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Site selection is a basic function for GIS technology, but it has not been used widely in the process of park site selection. Many factors should be considered during this process, such as ecology, society, landscape and existing parks layout. In this study, four park site selection conditions were put forward according to above factors. Based on these selection conditions, combining SPOT5 RS image,...
The technology of artificial intelligence breaks a new way in the area of network security. Applying the idea of ant colony optimization into network vulnerability detection and restoration system can improve the performance of network security management. Based on the research of ant colony optimization algorithm, a novel model of multi mobile agent vulnerability detection and restoration system...
This paper designs an energy monitoring system for a certain Motors Corporation in China based on not only the technology of combining industrial field bus with industrial Ethernet but also other technologies. System's main functions, hardware configuration, network structure, as well as the development of application software are all discussed in this article. Statistical data collected from that...
Against current welding mask existence's problems has designed one kind of auto-changing shade welding mask. The welding mask uses MCU as the core control circuit, through the establishment of different batches of LCD parameters database, resolves the key technical issues of difficult to accurately adjust shading caused by the non-linear characteristic and the discreteness characteristic of LCD. The...
Against the key technical issues of difficult to accurately adjust shading, auto-changing shade welding mask in this paper first use MCU control in our country. Through the establishment of different batches of LCD parameters database design expert system with advanced control strategies to ensure the accuracy of shading adjustment, raise the overall performance.
Base on a prototype of the 130 kw/5 kv high voltage generator, the system simulation model is set up for the generator stator windings suddenly three-phase short-circuit failure and loss of excitation failures. The dynamic simulation compared with experiment on DJ18-1 synchronous generator, it reaches conclusion that the system simulation model is correct. The current of the high-voltage generator...
A Constant-gm CMOS operational amplifier with rail-to-rail input common-mode voltage range has been designed. The input stage is based on two pairs of single p-channel differential pairs and two identical n-channel source followers as DC level shifters, which realizes rail-to-rail input swing. To attain a constant-gm over the whole common-mode input range, the compensation circuit which is based on...
The paper researches the structures of micro-incentive mechanism in teaching management, and puts forward two key elements of measuring micro-incentive mechanism, namely measuring quantitative and price of teaching activity, and then we provide some typical examples of micro-incentive mechanism and study the effects to teaching quality of different choices, and we also give some proxies of utilities...
Calculating the power loss of amorphous core transformer (AMT), S11 and S7 type distribution transformers in the same capability, and comparative analysis the economic benefits between AMT and S11 type transformer. It can be concluded that the effect of energy-saving of AMT is superior to the energy-saving effect of S11 type distribution transformers, and if replace the S7 type transformer by AMT...
To make external network power station drawing circuit diagrams more expediently, an automatic graphic generation based on CIM standard is developed. First, with the screen centre as basic point, the screen is divided into 4 areas, and various equipment lay aside separately according to certain rule. Next, voltage level structure table, bus bar structure table, transformer structure table and switch...
Urban planning is a important part of urban construction, spatial distribution is subordinate to urban planning, it is difficult to obtain a satisfactory solution by traditional optimal methods. In view of the factors that influence urban spatial distribution are diverse and dynamic and city needs to keep the balance continuously in the development, genetic algorithm method is selected because it...
Electronic instruments for aeronautics and astronautics usually endure stronger impact or vibration under hostile environments, which results in the storage of more deformation energy within the isolators. Another necessary requirement comes from the limitation of the assembly space where the larger isolator is unallowable. Compared with other commonly used vibration isolators, a plane supporting...
To MIPv6 networks, Identify authentication is an important part of the network security. In this paper, we proposed a secure identify authentication scheme. Which considers inters domain trust relationship between mobile node home domain and the access domain in the pre-handoff procedure and realizes effective mutual authentication between mobile node(MN) and the access domain. Based on the combined...
Cryptography in wireless sensor networks play important role, it will not only affect transmission reliability, and will waste valuable energy resources. CPK and IBE algorithms based scheme enhances system more stable. Mutual identity-based authentication guarantees node to communicate with the right one, by which the malicious nodes aiming to fake or send false information can be drawn away from...
This paper puts forward an analysis of the effects of zero sequence components on power devices in particularly on the dynamic voltage restorer (DVR) and gives simulation results. It is shown that four-wire DVR do better then the traditional three-wire DVR, unbalance voltage and zero sequence components can be lessened by four-wire DVR effectively, because it provides zero sequence current circuit...
The ever-increasing scientific literature and the exponential growth of large-scale molecular data have prompted active research in biological text mining to facilitate literature-based curation of molecular databases. Meanwhile, systems biology and bio-ontologies are emerging as critical tools in biological research where complex data in disparate resources are generated, integrated and analyzed...
The main frame of full face rock tunnel boring machine (TBM) has very complex configuration, function and space constraint relation. Aiming at these problems, a new method of variant design for TBM main frame based on KBE is proposed. The modularization variant project configuration for TBM main frame is designed with integrating KBE and modular design method. Moreover, the method can realize parametric...
Automatic generation control (AGC) is an essential requirement of modern power system automatic control. At present, slow response to AGC load demand is a serious problem existing in thermal power units taking part in AGC, which makes the control performance of power system AGC poor. The unit one and unit two of Yaomeng Power Co. Ltd., are all once-through boiler, its boiler-turbine coordinated control...
As the typical application of intelligent transportation system (ITS), highway tunnel surveillance and control system (HTSCS) is the critical system to improving the transportation safety and efficiency of highway tunnel. In this paper, a HTSCS performance assessment model which employs failure rate (probability of top events) as the performance index based on fault tree analysis (FTA) method is presented...
In networked control systems (NCS) network-induced delays affect the performance of system and even cause instability. A discrete model of NCS was established in this paper, and a feedback control method based on forecast for State compensation was given in view of the model. The method was applied in a simulation model of inverted pendulum, and was confirmed to be effective .Finally, the paper points...
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