Recommending Trust Model Based on Behavior for Distributed CA in MANET

Mobile Ad Hoc Networks(MANET) is a multi-ho Pand instant self-organized autonomous system of a collection of wireless mobile nodes.A multi-domain full-distributed Certification Authorities system model was proposed founding on its trait of territorial communication.The thesis researched this model and proposes a new model for the interoperability between virtual Certification Authorities named extended recommending trust model based on behavior.It can improve the system's security,retractility and robustness by dynamic trust chain maintenance with feedback information in the actual course.     

Study on Modeling for Pretreatment and Cyclic Control Stream

The characteristics of pretreatment and cyclic control stream are analysed:the form of cyclic embedded hardware circuit,the idea for designing the pretreatment program.The chart model of the system is established preliminarily.     

基于生态系统过程耦合的农业管理信息系统的分析与设计

对农业管理信息系统与生态过程模拟模型耦合进行了有益的探索,提出构建与生态过程耦合、基于空间信息的农业管理信息系统的设想,为农业管理和生态过程模拟模型在空间区域上的应用提出了一种有效、直观的解决方案。通过系统分析、系统设计及其功能实现技术的研究,采用SuperMap作为开发平台,利用二次开发语言开发了与生态过程耦合的农业管理信息系统(TES_AGRDSS)。该系统充分利用了地理信息系统（GIS）的强大功能,将各种信息进行综合、抽取,实现了单个模型内部的属性数据和空间数据的双向连接,以及不同模拟模型之间数据的双向连接与耦合,使得生态模拟模型在区域上的应用、生态过程模型与农业管理模型的耦合成为可能,为土地利用的管理与决策提供了强有力的帮助。     

大学生村官政策可持续发展途径探析——-基于制度嵌入性的视阈

为了解决大学生村官可持续发展问题,通过分析制度嵌入理论,结合大学生村官制度的调研,结果表明：大学生村官制度嵌入在有利的政治经济环境中,具有长远的发展意义,但其非制度化的特征引起的工资福利问题、认同度问题、职能划分问题制约其可持续发展;重构大学生村官制度的嵌入环境,鼓励大学生村官自主创业,能够很好地解决这一问题。因此,各级政府应该不断探索大学生村官自主创业的模式,并在理论和实践上不断使其完善。     

Robust Adaptive Control Based on On-line Identification to Multi-parameters

In system controlled,Sampling these parameters and with parameters for controller in time, it is an object to adaptive control. The article presents a scheme that the structure parameters on it's model and model parameters is robust identified by on line, while to optimal of algorithm on adaptive control is fulfilled. In control scheme, method of intelligent identifying to the structure parameters(levels of model) and algorithm of robust pole placement are introduced also It is advancer for already mentioned scheme. Whole scheme presents new model on adaptive control.     

Principle and Analysis of Rapid Feeder Protection System for Distribution Network

The scheme of rapid protection will be possibly implemented by using the channel of communication, as the communication network of distribution power system being increasingly perfect and particular foundation of optical cable. The feeder protection based on communication can quickly and selectively isolate fault section and restructure the distribution network. This method is the direction of distribution automation. The action principles of feeder protection using blocking and allowing signals of directional over-current are analyzed. The directional over-current protection utilizing blocking signals is suitablefor distribution automation. The scheme can locate the fault section and instantly separate it. When feeder terminal unit (FTU) fails to act or communicate is interrupted, the feeder protection in the substation can backup.     

Study on Broadband Cellular Mobile Communication System OFDM Based

The characteristic of broadband mobile channel is analyzed, then we construct a model of bidimensions wideband mobile channel based on delay and Doppler frequency domain. On the basis of describing OFDM theory, the design on initial physical layer of broadband cellular mobile communication systems is proposed. Simulation for base band system is ground on channel model proposed above. The results of experiment and simulation are relatively inosculated, which manifest the well prospect of the communication system proposed for future application.     

Design of the PC/104 Bus Mode Multi-channel Analyzer

This paper expatiates on the bus structure and develop the bus mode Multi-Channel Analyzer (MCA). The nucleus of this MCA is the PC/104 embedded computer, and it introduces the bus communication to realize system and data communication. It may realize data collecting and showing in the field, because the bus mode is rapid. At first, on the hardware we introduce CMOS components, this reduces power, volume and weight. These make it adapts to use in the field; besides, on the software we adopt C and assembly language to program in order to improve conversion speed. At the same time, single-task DOS operating system is infroduced, which makes the software run more steadily, operate more simply. By means of testing on the spot it can normally work, so it suitable to work in the field.     

Research of the Key Devices of Solar Blind Ultraviolet Communication System

The topic of this thesis is ultraviolet communication system,one model of the Free Space Optics(FSO).The Free Space Optics communication system for civil use regards infrared light as transmission medium.However,for military use,if we want to establish a local communication system(about 1.5 km) with jamproof and safe,it is impossible to use infrared as transmission medium.Based on the predecessors' research and struggle,they discovered that ultraviolet light,especially the ultraviolet light in the solar blind light spectrum is a perfect transmission medium.Because of the absorption of air and scattering process in the atmosphere it can provide a suitable transmission distance and the ability to get over obstacles.The importance of the thesis is to introduce the key devices used in the communication system.     

弹性波作用下渗流多孔介质微粒运移分析

弹性波作用下渗流多孔介质微粒运移分析是对目前静态流体或稳态多相渗流中微粒运移/捕集的补充,通过分析弹性波对微粒剥离运移捕集过程的影响,建立弹性波作用下微粒运移模型,得到对微粒运移效果和储层物性变化的影响规律。由推导得到的弹性波作用下微粒剥离临界速度可知,当微粒与孔喉半径的比值越小时弹性波导致的振荡附加力影响越大,临界速度与流体粘度、微粒/孔喉半径比成负相关,与基质胶结程度、结构力、微粒半径、微粒密度成正相关。弹性波作用下微粒运移模型需同时考虑多孔介质渗流速度的变化,此时微粒剥离释放速率增加,但随着波衰减和时间延长而降低,微粒在孔隙表面沉积滞留速率先上升后下降,喉道堵塞的速率有所上升,说明弹性波作用下微粒的剥离和悬浮能力增加,但亦增加了微粒在微细孔喉"架桥"堵塞的可能性。研究结论对岩石物理学和工业化波动处理涉及的储层物性研究具有一定指导意义。     

Development of Car Continuously Variable Transmission on the Basis of Personal Computer

During the process of developing the Car Continuously Variable Transmission, the Control rule of the system is so complicated that we have to adjust and modificate the control parameters often. Direct debugging and empoldering by using singlechip system will result in long empoldering period and low efficiency. The present article presents an empolder scheme based on the control of Personal Computer. In the empoldering process we will predigest the Car Transmission Control Unit of the Continuously Variable Transmission into an extension which is only used for parameter tracking and measurement, while the matching control of the system and the parameter monitor is achieved with the host computer. Serial communication is carried out in the communication between the host computer and the extension. In addition, we have developed the corresponding monitoring and debugging software with Visual C++ 6.0 also. The practice shows that the system has successfully realized the empoldering of the TCU(Transmission Control Unit) with great efficiency.     

Embedded System and Its Typical Developing Pattern

In the era of "post-PC", embedded system is regarded as a new representation. And its characteristics and developing technology are focused. The traits of embedded system, which are low power processor, compact operating system, prolifically peripheral interfaces and form, and its inner modularized framework are parsed. The typical developing pattern of embedded system is put forward,which is called Host-Target pattern . This pattern can make developers have clear design train of thoughts and divide the work, and also make the developing synchronously. And cross-compile and remote debug is the typical developing characteristics of Host-Target pattern. They are both discussed in this article. Finally we prospect the future of embedded system, and the network, system on chip (SOC) and lower cost of embedded systems are regard as its tendency by author.     

Application of Serial Ports Simulation in a Non-communication Fault Detection Device of Distribution Networks

This paper summarizes two kinds of fault detection techniques for distribution automation, that is with and without communication in fault detection, and then analyzes their merits and shortcomings. Moreover, according to the development tendency of distribution automation techniques, this paper presents an approach, through which the noncommunication FTU devices can detect transient fault voltage of distribution systems effectually. To detect transient fault voltage without standby batteries, the PIC Single Chip microcomputer with low power consumption and DSP chip with powerful data processing capabilities are adopted to form a dual CPU system. To realize the communication between the two CPUs, the general I/O port,s of the DSP chip are firstly used to simulate the UART communication of the serial ports and communicate with the PIC Single Chip microcomputer. The novel FTU devices based on this approach are tested in static and dynamic simulation experiments, the results are satisfied.     

Ananlysis on the Liability Financing in Leverage Buyouts

This article briefly introduces the principle and the character of the leverage buyouts since the rate of finance lever and the risk is high in the LBO, this article gives a game-theory analysis on the financing process between the purchaser and the investor in LBO by using the ROSS model. It is expected that some beneficial proposal to either side can be put forward by parting the equilibrium.in the last, it poses that LBO can be a way of broadening the financing channel on the annexation between the enterprises in our country.     

陆面蒸发估算的CRAE模型探讨

蒸发是陆面过程中联系能量和水分循环的重要过程。蒸发模拟估算在流域水资源研究和农业生产等方面具有现实意义。概述了互补相关（CRAE）模型的结构及其应用与发展。CRAE模型在实际应用中避开了复杂的土壤-植被系统,只输入常规的气象资料,即气温、日照、湿度,就可以估算陆面蒸发。CRAE模拟的流域年蒸发量误差在1%~10%具有较好的拟合性。因此,CRAE模型在流域蒸发估算、水文资源分析、农业生产中有较强的应用性。     

土体固结与溶质运移三维耦合模型

考虑堆场上覆堆积体自重引起的土体固结与溶质运移的耦合效应已成为环境土工领域中的热点问题。在Biot固结理论和溶质运移理论相结合的基础上,以孔隙率作为耦合参量,将固结方程与运移方程相联系,考虑土体固结对溶质运移模型参数的影响,建立了溶质在固结变形土体中运移的三维耦合模型。采用多场耦合有限元软件COMSOL Multiphysics对模型进行了数值求解。数值模拟结果表明,土体固结变形对溶质运移过程具有较强和持久的阻滞作用,导致溶质运移深度以及污染羽范围的减小,在模拟运移20 a时,运移距离减小率已高达27.75%,且随着时间的增加而逐渐增大;溶质在水平方向的迁移距离不可忽略,随着横向水力梯度的增大而增大。     

基于Quest3D的虚拟园林漫游系统的设计与实现

摘要：目前,虚拟现实技术在园林中的应用尚处于探索时期,但随着计算机软硬件水平的提高和可视化技术的不断发展更新,虚拟现实技术在园林中应用的领域逐渐广阔,对园林设计的影响也越来越大。本文以一个城市广场的园林设计为例,结合Quest3D技术制作开发了一个园林漫游展示系统。介绍了园林漫游展示系统的设计过程,研究了园林场景的建模、植物和水体模型的控制、光照和阴影设置、摄像机设置等问题。探讨了Quest3D技术在园林设计中的应用,研究了园林交互展示的相关技术,总结了构建园林漫游展示系统的方法和过程,为园林设计的展示提供一种有效的方法和途径。     

Low Voltage Power Line Communication Based on MSK

For that the characteristics of low voltage power line channel are complicated and variable, how to use low voltage power line to realize reliable and high speed communication has always been the hottest question in power line communication field. This article introduces how to apply MSK to the low voltage power line communication. It analyses the application elements of MSK and structures the model of low voltage power line communication based on MSK. simulation result indicates that MSK modulation technology can satisfy the characteristics that the bandwidth of power line communication channel is narrow and the attenuation to the amplitude of signal is time variable and frequency selected. Also, it makes better use of the spectrum.     

Trust in Virtual Enterprise：Determinants and Mechanism

Trust is the most basic operation mechanism. From the embedded visual angle, the cooperation relation is considered as the inter-continuation.The trust relation in virtual enterprise is embedded in the network of social relation and will evolve dynamically. The interaction between partners, which is composed of information communion and learning, plays an important role in the creation mechanism of VE's trust . Firstly, this article starts with the time dimension of cooperation relation in VE, compartmentalizes the trust relation of VE as two parts: initial trust and continuous trust. Secondly, it argues that the prior experience of cooperation, reputation and commitment can affect the initial trust obviously, accordingly, the life cycle of VE, opportunism, interdependence and the distance of culture and geographic distribution can determine the generation and development of the continuous trust. Finally, it develops a dynamic process model based on information communion and learning, which perfects Nielsen's static conception model.     

论促进农民增收的杨凌模式

杨凌示范区在促进农民增收工作中，创立了“政府组织，科技支撑，企业带动，农户实施”的杨凌模式，使杨凌农民人均纯收入年平均增加12.5%,快速的促进了农民收入的增加。文中论述了杨凌模式的运行机制、突出特色和实践作用。