【 Weak current College 】 room wired network cabling and considerations

Many users at by building their own proxy servers, hubs, switches, routers and other network surfing equipment. Most home computer network Terminal and network equipment, coupled with the network structure is simple, you may ignore the computer network cabling. 　　To use the wireless network of Fans, the suspense is available regardless of network wiring. However, for the economy, compatibility and transfer speeds multiple factors into account, the cable network is more flexible, secure. 　　I speak about the experience of indoor cabling. Wiring of principle 1. cabling in wiring design should be considered a phone line, cable TV and cable, power line and twisted-pair location. 　　Phone line and power line is not too close from the twisted pair, to avoid interference of the twisted pair, but also not too far away, the relative position to keep around. 20cm 　　2. focus on artistic home wiring more beautiful, so the wiring construction should go hand in hand with the decoration, the cable ducts embedded in the floor or decorative plates, information outlets are chooses embedded, bottom box buried in the wall. 3. simple design due to the information point of a smaller number that is easy to manage, so home routing does not need to use distribution frame. 　　Twisted-pair of end is connected to the information outlets, on the other side you can directly connect the Assembly line equipment, thus saving costs, reduce management complexity. 4. appropriate redundant cabling service life of 15 years, perhaps now the family has a relatively small number of computers, but no one can predict the future development of household appliances will be to what extent, may not take a few years, all the appliances can be managed with the help of the Internet. 　　Therefore, appropriate redundancy is very necessary. Design home wiring scheme should be taken into account when routing question 1. information point number typically, due to the master bedroom is usually has two master, it is recommended to install two information point, so that both sides can also use the computer. Other bedroom and living room just install an information point for children or temporary changes to the computer using the site. Especially when you have a laptop, the more consideration should be given in each room and Hall, an information point is installed. Restaurants typically do not need to install information point, because very few people will use the computer there. 　　If the community offer information interface, it should be laid from the interface to the Assembly line equipment of twisted-pair cable for home networking and community broadband connections. 　　In addition, the best in accommodation centres and front and rear balcony in a concealed location more layout 2 ~ 3 information point for future installation of a wireless network access point devices, your home computer's wireless network connection, and can carry a laptop to work outdoors. 　　2. information outlets in the choice of location information outlet position, also paid great attention to ease of use, cannot be furniture blocking and more subtle, less conspicuous in the bedroom, information outlets can be on either side of the bed; in the living room sofa can be located near the end of the window; in his study, it should be located near the information desk in the socket and the vertical distance above ground should not be less than 20cm. 3. set line device location because the Assembly line equipment are rarely in contact with, therefore, to ensure good ventilation, assembly line equipment shall be located in the most secluded location. Note that set line device requires power support, so you must set the decoration for the line device with power outlet. 　　In addition, the Assembly line equipment should avoid installation in wet, easy to get wet and electromagnetic interference is very serious. 　　4. keep away from sources of interference should be twisted-pair and the computer as far away as possible from washing machines, refrigerators, air conditioners, fans, to avoid these appliances on twisted pair transmission signal interference. 　　5. power supply separate from the computer, printer and set line device uses a power cord, and fluorescent lights, washing machines, refrigerators, air conditioners, fans use the power cord from the power supply to achieve individually to ensure that your computer's security and stable operation. 6. routing twisted pair should avoid direct sunlight and not placed in a damp place. In addition, it should be as far away as possible from the regular use of the channel and weight, to avoid possible conflicts, to ensure that the electrical performance of twisted pair.
House wiring scheme 1. two bedroom home wiring master bedroom two information point, located on both sides will be double beds while the use of the laptop. Secondary bedroom setup information points located in the vicinity of the bed or single bed, writing desk for children or guests. 　　The living room to install an information point, located at one end of the sofa or coffee table near more concealed location, easy to use notebook Office or entertainment in the living room. In addition, from the residential area provides information outlet cited a twisted-pair to the set line device for home network LAN access to the community. Telephone cable and power cord should be responsible for the laying of the distance between each other as 20cm. Information outlets, voice outlet and the power outlet of distance should 20cm. Wiring scheme can refer to figure design, including "." 　　Represents the information point. The twisted pair into the PVC pipes, laying on the floor mat. Needs over the wall, the wall close to the ground at the hole. Information outlets used wall type, in the bottom box in the laying of walls. The distance from ground-based information outlets as 20cm from the power outlet for 20cm distance. 　　Set line device (hub or switch) installed in the bedroom, it is proposed to adopt 5 port desktop device, can be fixed in writing desk near the side of the bed, not only save space, ensure proper ventilation space, while avoiding device directly influence is artistic exposure. 2. three bedroom home wiring two rooms are the same, it will not repeat them. Since the three bedroom living room is usually relatively large, so you can consider on both sides of the wall are installed an information point, are located away from the window 1m ~ 1.5m concealed location, easy access to the computer at the same time. Cabling requirements and two living rooms are exactly the same. Three bedroom alignment styles and two rooms are the same, note the "." 　　Represents the information point. 3. duplex home wiring upstairs master bedroom and secondary bedroom design, as well as community broadband link and two rooms are the same so it is no longer here. First floor Hall of the twoSide wall installation of an information point, respectively, are located at the distance of window 1m ~ 1.5m concealed location, convenient for both the access computer or wireless access point, in floor and wall holes and into the PVC pipe, realization twisted pair line in the floor of the crossing between the rooms. Recommended assembly line equipment installed in the back of a stairs, ease of maintenance, without affecting the appearance. Cabling requirements and two living rooms are exactly the same, including the "." 　　Represents the information point. If community broadband allows each family has more than one user to access and use DHCP dynamically assigns IP addresses, then simply use a crossover cable hub and community information socket connections. If the community does not provide DHCP service, you need to every computer set P address. If the community just as every family is assigned an IP address and MAC address by restricting access number, you must use the broadband router or proxy server. How to use broadband router, use a crossover twisted pair connection router WLAN port and community information outlets, and then use a crossover cable connected to the router's LAN port and family set line devices, using a proxy server, if you use Windows ICS, you need two network cards, a network card to connect a network adapter to connect the community that the home network.

【 Weak current college 】 building weak electricity system--the fourth section telephone communication and computer network system

First, telephone communication system telephone communication system is a smart building information transmission network of basic components. Traditional telephone systems are limited to telephone, Telegraph and other audio and low-speed data communication services, generally using the audio cable laying.　　The present building of user demand for information is not just the auditory information, more need to transmit Visual information, such as text, graphics and images, and other activities, such as non-voice, data transmission, videotex, e-mail, video phone and multimedia communications, etc. Intelligent building telephone communication systems typically include digital PABX, distribution frame, transfer box, cable boxes (boxes) and transmission lines, and other equipment.　　At present, the user switch and Nan connected with fiber-optic cable trunk lines are generally, building of transmission line performance excellent double Ridge cable. Telephone communication system installation is required in building embedded underground communication cables and pipelines, cabling, and building reserved telephone connection rooms, cable shaft, pre-buried pipe and cable wiring harness.　　If you need to set the user switches, but also in building up the telephone station. The communication aims to achieve a certain area in any two terminal information exchange between users.　　To do this, you must handle the signal send and receive, signal transmission and signal Exchange three problems.　　Telephone communication system consists of a user's terminal equipment, transmission systems and switching equipment is composed of three parts.　　1. user terminal equipment of a user's terminal equipment to complete the signal send and receive, equipment mainly in telephones, fax machines and computer terminals, etc. 2. telephone transmission system telephone transmission system as the transport medium into cable transfers (wire, cable, fiber, etc.) and wireless transmission (short-wave and microwave relay, satellite communications, etc.). Wired transfer press transfer information work is divided into analog transmission and digital transmission. Analog transmission is to convert the information with the appropriate size of the current analog transmission, phone is a simulation of voice information transmission.　　Digital transmission is information by digital encoding converted to digital signals for transmission, digital transmission a antijamming ability is strong, confidentiality and integrated circuits, etc., now the program-controlled telephone exchange is to use digital transmission of information. In the cable transmission of the telephone communication system, transmission line has a subscriber line and trunk. Subscriber line refers to the user and switch between the lines.　　Two switch between the lines is called a trunk. 3. telephone exchange equipment, program-controlled switches now widely used as a telephone switching equipment. The so-called program control refers to a control, it is the computer stored program control technology applied to the telephone switching equipment. This control is to advance the telephone exchange function compiled into the appropriate program, and program and related data are deposited into the store.　　When a user calls, the processor in accordance with the directives issued by the program to control switch, to complete the continuation function. Telephone switches according to its usage scenarios can be divided into two categories: one category is used for large switch PSTN, such as long-distance telephone switches and switch; enterprises and institutions within the telephone exchange of private branch exchange, commonly referred to as the small operator, or user switch.　　User switches General capacity, internal users can via local Council, so as to reduce the load on the local Council of telephone traffic, improve user line distance. A user switches a general-purpose and special-purpose, general-purpose user switches apply to voice service oriented unit; special switch applies to the various features of the unit, such as hotel type switch, a long distance call instant billing, message, room status, do not disturb, wake-up service and comprehensive voice capabilities.　　In addition, there are Office Automation-, banking-and network-user switch.　　Second, computer network systems, the definition of computer network: where location is different, having independent function of multiple computer systems through communication equipment and lines concatenated, separated by full-featured network management and control of the software to achieve the mutual exchange of information and sharing network resources of the system, known as a computer network system. 1. computer network function (1) information for rapid transfer and focus
Take advantage of this feature, you can use geographically dispersed units or departments connected via a computer network for mutual exchange of information and information from the parties, in order to concentrate on the units or departments for control and management. (2) resource sharing
Users on the network can share the network hardware and software resources and information resources. (3) balanced load and distribution processing
When a host of overload, you can set certain jobs over the network to the other host processing in order to balance the load and reduce local burden can improve equipment utilization. For a comprehensive, significant problems can be resolved after the job decomposition to different computers, balanced use of network resources, the purpose of achieving distributed processing.　　Today's calculation of a new trend — collaborative computing, is the use of a network of several computers to work together to complete a task. (4) comprehensive information service
Through the computer network to the whole society offers a variety of economic information, technology information and consulting services, and may transfer digital, sound and graphic images, and other information. (5) improve the reliability of your computer
In the case of stand-alone use, when a computer or a part of a failure would result in downtime, the computer will not be able to continue to use, and in computer network systems, computer and software resources available on each back-up, failure of tasks to be completed on behalf of the other computer, greatly improves the reliability of computer systems. 2. the composition of the computer network system (1) network hardware system
Composition of the LAN network hardware system can be divided into five categories: servers, workstations, network switching interconnect devices, firewall and external devices. ① Server is the personal computer (PC) or workstation or small computer. The server should have a high performance, including faster speed, more memory and a larger capacity hard disk. ② network workstations. Means to enable users in a network environment on a work planComputer (client). The role of network workstations is to let the user work in the network environment, and run from a network file server provides a variety of application software. In a LAN Server generally only store shared data or files, and on the information or document to run and processing is accomplished by the workstation. ③ network switching interconnect devices. Including network adapters, modems, network transmission media, repeaters, hubs, bridges, routers and gateways, etc. ④ Firewall. Is on the intranet and Internet of the barrier between architecture, it is differentiated and the need to distinguish between Office setting conditional isolation devices to protect the intranet information, resources, and so are not affected by illegal from Internet users. ⑤ external devices. 　　Can be networked users shared, common hardware resources, such as a laser printer, drawing equipment and mass storage systems. (2) network software system
According to the role of the network software and features that put the network software is divided into network system software and network application software. Network system software is the control and management of network operation and network resources using the network software, it provides users with access to the network and operations network into the machine interface.　　Network application software is an application for a particular purpose and the development of network software. In the network system software, the most important is the network operating system, network operating system often determines the network properties, functions, types, etc.　　There are a variety of LAN network operating system, the most widely used mainly in Microsoft Windows, Novell Netware, Banyan VINES, and the company's UNIX, LINUX, etc.　　Network application software is the use of application software development platform developed some software, such as JAVA, ASP, Perl/CGI, SQL, and other professional software applications. 3. classification of the computer network is the computer network is mainly based on a particular aspect of the feature to be classified, usually have several classifications. Press coverage of the geographical scope, divided into the wide area network (also called remote Web), LAN (local network) and Wan (City area). Press communication rate, divided into low-speed Internet, medium-speed network and high-speed Internet. The topology of the network, is divided into the star network, bus-NET, ring network, tree, mesh and hybrid network. As the transmission medium, divided into twisted-pair network, coaxial cable, fiber, wireless media network and mixed media network. According to the information exchange, split into circuit switched, packet switched networks and integrated switching network. 　　By using range, divided into public and private networks. On a computer network, coverage and communication rate is most concerned about two issues, both of which are often contradictory, that is, the larger the network coverage, communication rate lower, network coverage, the higher communication speed.　　The following provides an overview of the common press covering geographical scope to share three of the network. (1) a WAN (Wide Area Network)
Also called a remote network, its characteristics are covered range from covering several cities to a national or even global. Wide area networks are generally the use of telecommunications or utilities existing public or private communication lines as a transport media, the network consists of multiple departments or more countries combined.　　1969 United States Department of Defense Advanced research projects Agency Organization, developed by APPA network was one of the wide area network, it has been from birth till today, not only over the American continent, and spans two Ocean extending into Europe, Asia, and the rest of the world, has become the world's largest wide area network, the Internet network. (2) LAN (Local Area Network)
It is in the local scope using the computer network, features, covering geographical scope is limited, relatively small, network computers and related equipment are typically limited to one unit, of a building or even an Office. Intranet, network construction time is short, low cost, flexible, economic and social benefits significantly.

LAN generally do not use public communication line, but specialized separate laying of own communication lines. It takes the transmission medium for the twisted pair, fiber optic cables in General.　　LAN transmission distance of more recent, but data transfer rate is very high, and low error rate. (3) the man (Metropolitan Area Network)
Metropolitan area network (MAN) usually cover a city or area, between the Wan and LAN, it is in the local area network developed on the basis of a new kind of network. As Internet users growing and constantly widening the field of application, General LAN has become too great, the new application requirements to multiple LANs connected together to form a greater coverage area, and support high-speed transmission and integrated business service, suitable for large cities are using computer network, thus forming a metropolitan area network.

【 Weak current College 】 pump safety operation knowledge

The first section pumps-basic requirements and security management

I. basic requirements and general provisions

1. water pump industry must learn this post security operation procedures and relevant security knowledge, by the State after a medical examination, training and pass an examination certificate issued to operation, certificates, participate in periodic refresher training programs.

2. must be familiar with the construction of drainage equipment, principle, performance, characteristics, uses, repair, will exclude General failure.

3. strict compliance with the relevant rules and regulations and labour discipline, is strictly prohibited to drive to work, before going to work must wear PPE, class cannot do non-work-related things.

4, must be put in scene shift to leave the workplace, you must leave, be sure to take reliable security measures.

5. work must be detailed inspection equipment, tools, such as finding adverse circumstances, should be immediately processed or, strictly prohibits the use of force.

6. operation must note there is no impact on the surrounding environment and personal safety equipment. The highly concentrated attention, chat, play, is strictly prohibited.

7, two or more people work together, you must clear a responsible person, should fulfill the responsibility, mutual supervision.

8, pump room, the door should be hanging "non-staff, no sign of human" is strictly forbidden to stay at the pump house were on fire.

Second, water pumps work safety management

1, pumps work shift system

(1) succession must arrive within the allotted time, the workplace and the shift to shift the scene.

(2) successors did not reach the workplace, people will be allowed to shift away from work to please others alternative shift.

(3) shift, you must set the status of equipment, materials, tools, spare parts, accessories and other junction.

(4) shift personnel must be on duty in the circumstances and problems to succession duty clearly, people can deal with the problem, you must shift handle, cannot handle, must be well documented and timely reporting. Shift personnel should do well in the engine room and equipment cleaning.

(5) shift staff must sign the shift register.

2, water pumps work post responsibility system

Water pump worker should earnestly perform job responsibilities to ensure the safe operation of the pump.

(1) comply strictly with the shift system on time shift in the workplace.

(2) comply strictly with the operation of statutes, adhere to the chapter.

(3) comply strictly with the labor discipline, not late, leave early, sleeping in class.

(4) the strict implementation of the security system to remain independent staff person.

(5) enforce device circuit inspection system.

(6) Note the various instrument readings are good, listen to the sound of the device, check whether the normal motor, pump body and bearing temperature is normal.

(7) water level changes and stop the pump in a timely manner.

(8) for directions in violation of the right to refuse work, equipment maintenance unqualified right to refuse to receive materials, accessories, security appliances, the unqualified right to refuse use.

(9) keep pumping equipment and the environment clean and tidy.

(10) timely, fill in the various records, discovery issues timely reporting.

3, the crucial point of the safety management system

Water pump house is important and hydropower production activities, in order to ensure the physical integrity and the drainage, must strictly implement critical workplace safety management system.

(1) is strictly prohibited within the pump house were on fire, access and stay at home. Forced entry to the defence sector.

(2) external staff (associate of visit, study, etc.) must be of safety supervision departments and has guided before entering.

(3) in addition to the engineering staff, all access to key places of personnel must strictly enforce access registration system.

(4) where the approved into the vital place of foreign personnel, must obey the duty officer and led the staff of the satirical play command, without permission, is not permitted to use the device, not allowed to copy the information and data, are not allowed to take pictures and video.

(5) are forbidden to carry flammable and explosive and dangerous goods into the engine room (the room required

The exception). The engine will not be allowed to pile up incidentals and hosting other items.

(6) must adhere to the workplace, no shortage of posts, empty post and unauthorized requests on behalf of the gang.

4. electromechanical equipment Charter management

Charter management is: package operation, maintenance, and repair the package. Allows operators to: understand the practice, to understand device performance and to understand the principle, operate, maintain, repair, judge and handling incidents.

Introduction to electrical and mechanical equipment, packaging systems, listing management can enhance job pump work, maintenance staff accountability and improve service quality.

For each device you want to establish clear roles and responsibilities, to make water pump, for overhaul maintenance personnel, equipment, materials, spare parts for consumption, make reasonable spare parts and material requirements planning, fair use, maintenance and upkeep of equipment, give full play to the efficiency of the device.

Pump engineering, maintenance personnel must be familiar with the equipment model specifications, technical performance, drawing materials, works, quality standards and procedures, and so on, must pass the training, examination candidates before appointment.

Pump engineering, maintenance personnel on the jurisdiction of the equipment is responsible for identifying problems in time, for maintenance, adjustment or replacement, the equipment is in good condition and normal operation.

Seriously implement the device periodically maintenance, replacement system, and doWell the various records.

Regular reporting to the competent personnel and equipment problems, continue to improve the equipment of the defects and deficiencies, and make suggestions.

5, equipment checking management.

Inspection of the time normally once per hour. The main contents of roving examination:

(1) all fasteners and pine plant should be complete, no loose.

(2) heating parts of temperature overrun (plain bearings is not greater than 65oC, rolling bearings is not greater than 75oC, motor temperature not higher than the rated temperature rise), the packing box and casing not hot, forced lubricating oil pump system work properly.

(3) packing tightness should moderate (not intake, not dripping).

(4) motor, pump is shaped, abnormal sound or I-mode.

(5) current does not exceed the prescribed value, voltage fluctuations not exceeding the rated voltage value of ± 5%.

(6) gauges, vacuum table indicates should be fine.

(7) Note the change well water, surface water wells accumulate dirt from the pump bottom valve bottom distance not less than 0.5m. Water pump shall pump under the circumstances, shall the cavitation and gate closed cases long running.

Roving examination findings and treatment, should fill one running log.

【 Weak current College 】 harmful decoration material standard policy control decoration pollution

National indoor decoration materials harmful substances limits law begins mandatory implementation. During renovation process, what is a hazardous material? how to avoid public decoration should buy unwanted decoration materials and decoration pollution problem for these? reporters interviewed lndoor environment testing center songguangsheng Director.　　 Q: the national post of 10 species of the indoor decoration materials harmful substances which limits "is hazardous material. A: mainly include wood and its products, solvent-borne Wood coatings, interior paint, adhesives, wooden furniture, wallpaper, PVC floors, carpets and carpet pad and carpet adhesives, concrete admixture, building materials, radioactive nuclide 10 categories, these will cause decoration pollution. Q. 10 the indoor decoration materials harmful substances limits "in the main control which harmful material on the decoration pollution indicators? a: for indoor decoration materials, use of raw materials and auxiliary materials, manufacturing processes, using procedures and so on each link may cause harm to human health of various harmful decoration materials, standards for hazardous material in formaldehyde, volatile organic compounds (VOC), benzene, toluene and xylene, ammonia, free toluene diisocyanate (TDI), vinyl chloride monomer, styrene monomer, soluble lead, cadmium, chromium, mercury, arsenic and other harmful elements, and construction materials of radionuclides concentration values are clearly defined in order to reduce the decoration pollution. Q: what is the mandatory standards, and why the indoor decoration materials harmful to limit of harmful substances as mandatory standards? a: the People's Republic of China Standardization Act: national standards are divided into mandatory criteria and recommended standards. Protection of human health, personal and property safety standards and laws and administrative regulations enforceable standards is mandatory standards. Therefore, in formulating the indoor decoration materials harmful substances limits of law, in order to protect human health and personal safety, interior decoration materials and decoration harmful pollution control and management, in accordance with the provisions of the standard as a mandatory national standard. To reduce harmful decoration materials decoration pollution. Q: States in the implementation of the mandatory standards which require? answer: in order to guarantee the correct implementation of standards, the standardization of the law in Chapter 3, article 14: the mandatory standards, you have to do. Does not comply with the mandatory standards for products, the prohibition of the production, sale and import. At the same time in the legal responsibility of Chapter 4, the provisions in article 20: production, sales, import does not comply with the mandatory standards for products, legal and administrative regulations of executive authorities in accordance with the law, legal, administrative regulations, not provided for by the industrial and commercial Administration Department confiscated products and illegal proceeds, and fine; serious consequences as to constitute a crime, on a direct responsibility personnel, legally investigates the legal responsibility. These harmful decoration materials and decoration pollution of mandatory standards for the consumer to provide a strong basis. Q: How does decorative businesses and consumers, in accordance with criteria to distinguish between harmful material and avoid decoration pollution? answer: the first is to buy construction materials or furniture do not figure, as far as possible to conveniently cheap regular building materials market to buy, so you can avoid buying as much as possible into the harmful material, reduce the decoration pollution. The second is the Distributor for the new standard test report. Third, let operators in invoice indicating the product name, unwanted decoration materials limited levels of harmful substances. Fourth, in the use of materials to keep some small pieces of specimens, in the event of a decoration pollution or other issues you can do it in evidence. Q: does not buy unwanted decoration materials also have a decoration pollution? a: the House decoration pollution sources is more complex, the control of harmful material only address one aspect of the decoration pollution. In addition, there is how the housing space reasonable design, how to choose no decoration pollution of the construction process, the proper solution to the problem of indoor air and so on, which is why some decoration enterprises and consumers to buy the best decoration material, but still decorate a present decoration pollution of room. Q: found purchased harmful decoration materials and decoration pollution? a: national consumer rights protection law provides that: in accordance with the relevant administration determined to be ineligible for the return of goods, consumer requirements, operators shall be responsible for the return. Operators of commercial fraud, according to consumer demands increase the loss of their compensation, increase the amount of compensation to consumers to purchase prices doubled, we often speak of a "taking a loss." The consumer rights protection law also stipulates that the goods in the donation, adulterate, yijiachongzhen, falsification, or unqualified products posing as qualified products; producing countries explicitly obsolete items or sell merchandise, metamorphic, according to the seriousness of the single Office or Department warned, confiscation illegal obtained, by illegal income more than doubled to five times the fine, not illegally obtained, is punishable by a fine of ten thousand Yuan; serious cases, order the rectification, their business licenses. If the decoration enterprise and consumers find themselves buying unwanted decoration materials, decoration pollution can protect their legitimate rights and interests.

【 Weak current College 】 Intelligent Home Plug-and-technical specifications

1 HomePnP specification overview
HomePnP standards makers to establish reliable family system technology provides some new ideas, the most important of which is: a public device language; the independence of the transmission protocol; state object, listen to the object and the request object; subsystem of loosely coupled; home mode and State vector; configuration process.


1.1 transfer protocol independence
The independence of the transmission protocol is the most HomePnP specification for one of the main objectives of, the specification by addressing three main function to handle application-tier and higher. Household electrical appliances plug (HomePnP) uses a hierarchical structure, the lowest representative application layer and its related public application language (CAL), which is included in the standard EIA-600 (CEBus), it can be waived in different product between expensive language translation gateway. Context data structure layer represents a wide range of development with CAL syntax into the product model. By defining security, lighting, environment, energy management, public facilities, computers and entertainment applications of functional product parts, components to industry appliances models. At the top are system guide, it pointed out that the plug and play installation of the product must have what behavior characteristics. These guiding principles relating to the previously unresolved problems. HomePnP specification so that manufacturers can use an application protocol, and select the appropriate independent transmission network (PL, RF, IR). Application layer from the following transport layer to get some of the services. Because HomePnP intends to run on existing consumer electronics protocol such as CEBus and IEEE1394 (FireWire), so it's only after transport layer below the proposed minimum requirements.


1.2 status, listen to and request objects
In the application public EIA-600 language (CAL) provides three standardized object type — the State object, listen to the object and request objects. HomePnP officially establishes the State, to listen to and request objects. For example, in a contained conditioner, electric water heater system of intelligent home system, the request object cause device changes state, then the State object published status change, all of the work of listening object can tune in to this state information. These three objects constitute various subsystems through loosely coupled interoperability.


1.3 subsystem of loose coupling
Loose coupling is a feature of HomePnP. Smart family HomePnP structure using subsystem loosely coupled, new ideas, the complexity of the equipment by natural form hierarchies. In a loosely coupled way, subsystem can assure all other HomePnP subsystem reports status information and allows manufacturers to design products without having to learn more about other manufacturers ' products. For example, we can design a security system: If the window is opened air conditioner is started, the security system will issue a warning. A loosely coupled way security system with just a right to object, to listen to the information from the environment monitoring, in accordance with the contract from the air conditioner. Security system depending on your design decisions to use or do not use this information. The request object also can be caused by network status changes.


1.4 home mode and State vector
State vector from the beginning, it home mode reflects user to home set work objectives, shared by the various subsystems. These vector information is more information from the subsystem extracted, take hierarchical structure. Home mode to define the first element is the State, the State can be a person, no person or uncertain; the second element is the probability that the optional certainly or probably; the remaining elements of the home state of the change request, and gradually make ideal home in depth work status of detailed requirements. Home mode in the hierarchy of practicality, listening devices to vector analysis, and in accordance with their own understanding of action. But lighting subsystems may only under some State or State control over some of the lights, and another subsystem may use the above all vector control.


1.5 configuration process
HomePnP for Advanced Intelligent Home system opens up development path, but does not require consumers to one step, consumers will still be available from the system start, gradually increasing and extending their systems. Configuration process can be divided into three stages. First is the use of two of the most common medium power line carrier and RF configuration device basic communication capability, it should be noted that required the use of special handshake steps to avoid various interactions. The second stage is to make a device equipped with a state object, which requires network to each State of the object is assigned a unique identification number. The third stage is equipped with a device to listen to the object requesting matching state object that is called automatically. HomePnP


1.6 other research topics
A study on the subject of other HomePnP are: product groupings, including geography, scenario and other groups; scheduling, a better use of network products one approach is to arrange the time of the event. HomePnP will provide detailed data structure and edit methods; lock, HomePnP will provide a tool for some action and lock a device, in whole or in part; security and privacy, the application might require multiple levels of security measures, it is necessary to provide the required protection, and not too complicated; the user interface, HomePnP will provide the context for the user interface and the object to ensure that can be used with other HomePnP device interoperability.

【 Weak current College 】 project time management (1)

Time management priority is making progress management plan, but not the activity definition, schedule management plan not as a separate process definition, but actually exist as part of project management, schedule management plan to tell you how to make already if effective management and tracking project progress. Schedule management plans should include identifying development schedule of estimation methods and procedures, to approach and how to estimate to determine the progress of metrics and deviation management method, determine how to track progress on performance and projects change programs.
1. the activity definition
In the range defined process or output work breakdown structure WBS WBS, the lowest level is a work package, and the activity definition is targeting the underlying work package decomposition, as progress estimates that arrangements, tracking and control Foundation. In real-world projects we often do when direct WBS decomposition is decomposed into an activity, or because the decomposition to active number is too big and directly on the network map in work packages, these are not scientific.
Activities defined output is a list of active list and milestones, note listing just list what activities, what are the milestones and does not contain the duration or specific time points and other information. Another output is active properties, this is a time management follow-up all process group to continuously updated one output, are more active in one or more of the properties are updated or added.
2. the activities of the sort
Activities in order to determine the activity before and after and dependencies, forming a network map. In the active sort phase network diagram only reflect activity dependencies, when the active duration estimate completed activity diagram can calculate the critical path, when taking into account the balance between resources and the resource calendar when the activity diagram might become a valuable progress meter.
Single-arrow network (PDM, AON)
A. you can have the start-finish, start-start, finish-start, finish-complete the four relations
B. There is lag and lead volume
C. activities in node above
-Arrow network (ADM, AOA)
A. activities on the arrow line
B. in order to express dependencies, you need to use virtual activities
C. amount without delay
D. only complete start a relationship.
Graphical evaluation and review technique (GERT): is a network drawing method, the focus is on running loop or conditional
Program evaluation and review technique (PERT): three-point method
The value of the calculation: PERT (optimistic time + 4 * most likely time + pessimistic time)/6, deviation (optimistic time-pessimistic time)/6
Three dependencies
A. mandatory logic
B. free dependence (preferred logic or soft logic)
C. external dependency (external dependency from the project, General network map does not reflect)

【 Weak current College 】 property management exam blanks selection (2)

(11) owners (late) non-payment of service charges of the property (property owners Committee) shall supervise the pay period; the late still does not pay, property management companies can sue to the (Court). Article 67
(12) owners to (owners or owners ' Committee), in violation of laws and regulations, the Constitution crime, legally (criminal liability); If no crime is constituted, legally imposes the punishment (order management). Article 68
(13) the construction of the State administrative departments, local people's Governments at or above the county level (real estate Executive) authorities or (other relevant administrative) staff use their own position, accepting others property or other benefits, not to discharge the duties (supervision), or discovery violations will not be investigated, the Constitution crime, legally investigates the legal responsibility; no crime is constituted, legally imposes the (administrative sanctions). Article 69
(14) the State shall encourage property management adoption (new technologies, new methods), count on (Science and technology progress) improve management and (service) level. Article 4
(15) (State building administrative authorities) responsible for the national property management activities of the supervision and management. Article 5
(16) owners should (and maintain) property management in all of the owners in the region (property management activities). Article 8
(17) the Division of property management area should consider property (common facilities), (building scale), (community development), and other factors. Specific measures by provinces, autonomous regions and municipalities. Article 9, paragraph 2
(18) a general decision, must be approved by the voting rights held by the participating owners (1/2 above). Owners to develop and modify the owners'convention rules (selection and dismissal of property management companies), the use and special maintenance funds (continued preparatory programmes) of the decision, must be approved by the property management area all the owners hold over two-thirds vote. Article 12, paragraph 3
(19) the residence of the general meeting, shall be informed at the same time related (residents ' Committee). Owners'committee (records of the general meeting). Article 14
(20) the owners ' Committee shall be elected as of the date (30 days), location of the property area, county people's Government (real estate executives) sector. Article 16