Aimed at the widespread practical significance of solving geometric constraint problems in engineering, classic numerical methods are highly sensitive to the initial guess, but it is difficult to find a suitable good initial guess in practical operation. So the problem of solving geometric constraint is transformed to the problem of function optimization, and then, Election-Survey Optimization Algorithm...
To estimate the life cycle cost for overhead lines, this paper established a 3-dimensional cost model of life cycle cost with life cycle breakdown, product breakdown structure and cost breakdown structure. Based on the model, this paper defined the cost elements of overhead lines, analyzed the influence of overhead lines' characteristics, learning curves and maintenance routine period on life cycle...
Construction site in order to achieve a simple, efficient, flexible, and developed content management and style set the separation of “web site building tool,” allowing people who are not familiar with HTML or other programming language, people can create, modify, or delete site content. Using the method of layering, this paper realizes content-management function component designing, achieving module...
In this paper, Ant Colony Algorithm, (ACA) is taken as the research object. According to its characteristics, improvement of algorithm and application is made and obtains a good result. Using the parameters of the algorithm in the theoretical analysis, the qualitative parameters of the algorithm is given in the scope of the conclusions based on the optimized settings. Finally, the improved algorithm...
In order to offer security for multicast applications, the group key has to be changed whenever a user joins or leaves the group. At present, there are two re-keying strategies: individual re-keying and batch re-keying. Individual re-keying method has the problems of inefficient and out-of-sync. Batch re-keying method alleviates these problems, but this method ignores the change probabilities of members...
In this paper, we take the design requirements of device identify mechanism for network lighting control system as the instruction, the content, basic framework and the sub-agreements option on device identify mechanism for network lighting control system are proposed. Based on these results, the cooperation relations among these sub protocols are explained.
In order to provide scientific and rational support for disposing abrupt river environment pollution accidents, minimize to loess, it is necessary to set up rapid reaction mechanism of sudden environmental pollution. With the advancement of GIS technology, it is feasibility to develop abrupt environmental pollution emergency decision-making supporting system. In the paper, aimed at the pollution in...
The geometric constraint solving can transform into the numerical optimization solving. A new hybrid algorithm is proposed which combines the merits of global search of the Genetic Algorithm and the good property of local search of the simplex algorithm approach. This algorithm uses Genetic Algorithm to search the area where the best solution may exist in the whole space, and then performs fine searching...
Manchester II coding is now widely used in many aerospace and aeronautics bus protocols. In all these protocols, the maximum data transfer rate is less than 20Mbps. Due to lack of core physical interface (PHY), higher data transfer rate can not be achieved, and key system performance can not be raised as well. To break this bottleneck, a new type fiber-optic bus PHY was designed and implemented. In...
The paper has mainly discussed extractive method to attack targets of remote sensing image. Based on two-dimensional histogram, made up of pixel gray level and its neighborhood average gray level, it has analyzed traditional method adopted Fisher criterion to extract targets. Due to inaccurateness of extract targets, then improved that draw two parallel lines along the two-dimensional histogram diagonal,...
The purpose of this study was to provide a unified modeling framework of Product Lifecycle Management (PLM). Firstly, this paper formed a full-scale manufacturing data structures after analyzed manufacturing data and the relationship between them integrally from the user perspective. Secondly, this paper presented a Total Object Unified Mode (TOUM) method which was used to abstract the concepts of...
This paper deeply analyzes the characteristics of P2P flow and the most popular detection algorithm, on the basis of which, P2P-based weighted behavioral characteristics of deep packet inspection algorithm is proposed, which better combined two kinds of practical P2P detection technology, solving problems of a high rate of false behavioral detection technology positively in the way of P2P flow weighted...
Effect of antenna selection on channel capacity of MIMO system is studied in both full rank and rank deficient channel based on a modified Water Pouring algorithm. Simulation results show that in rank deficient channel transmit antenna selection will increase channel capacity while in full rank channel it will reduce the channel capacity. Meanwhile practical significance of antenna selection in full...
e-Government, in which the workflow technology occupies the essential position, plays a leading role in the information construction of Chinese governmental affairs. However, the workflow system which is widely used currently mainly relies on workflow parameters and the process of how the workflow can be practiced. The paper puts forward and constructs an e-Government model on the basis of ontology,...
Web-based virtual laboratories are promising to save experimental cost, to avoid danger, and to support collaboration and resource sharing. This paper discusses the theoretic basis for the design of web-based virtual laboratories, proposes four key design issues, including the design of virtual experimental instruments, the design of virtual experimental contexts, the design of virtual tutor, and...
For the problem of wind power generation system (WPGS) with much uncertainty and serious nonlinearity, precise mathematical model based traditional PID controller cannot meet the requirements of pitch control. In order to improve dynamic performances of WPGS in constant power output running area, a radial basis function neural network (RBFNN) based self-tuning PID pitch control strategy is resented...
This paper summarizes the structure of WinPcap and introduces the capture principle of Ethernet packets. Based on multithreading technology, WinPcap captures the network layer packets. The design and realization method are provided by this paper. The overall optimization of system has improved the ability of the packet capture and greatly reduced the rate of packet loss. Data contents of the captured...
In this paper, course timetabling problem was referred as the research object, the objective function converted by many constraints and soft constraint condition was analyzed. Established the mathematical model, proposed discrete particle swarm algorithm and simulated annealing algorithm that combined to settle course timetabling problem, which ensured that the particles escaped from the local minimum,...
Integrating healthcare enterprise is one of hotspots in the present medical field. In the article, based on analysis of current status of medical information, a novel integration model is constructed where multi-agent technology and XML are introduced to medical information resource integration, called HIIS-MA, which is a multi-agent model, including user agent, management agent, integration agent...
As one of the most important technologies in the information era, Wireless Sensor Network has been widely used in medical and other various social fields. This paper described the various research applications of ZigBee-based Wireless Sensor Network technology in medical fields. Based on its low-power, low-cost, network flexibility and some other features, we presented the significance, the principle,...