WSN多节点决策信息融合在机器人自主导航中的应用

将机器人作为无线传感器网络的（WSN）的移动节点,可实现节点动态自定义部署并扩大其监测范围。建立了接收信号强度（RSSI）势场量化的坐标系描述机器人状态及导航空间,有效避免将RSSI值转换为距离时带来的模型误差。由处于机器人可通信区域内的若干信标节点组成一个分布式导航网络,每个节点都会对机器人做出独立的导航决策,最后由决策控制中心融合各信标节点的输出决定机器人的航向。采用分布式处理技术,绝大部分导航信息数据处理都由信标节点完成,因此很大程度上简化了机器人的设计和硬件成本,仿真和现场实验都表明该系统的有效性。     

足球机器人系统控制结构的研究与协作实现

本文分析了足球机器人系统集中式控制结构存在的问题，提出了足球机器人系统分布式控制结构，研究了足球机器人系统的协作机理和规则。仿真实验表明，分布式控制结构优于集中式控制结构。     

民机机电系统3H架构仿真的任务划分研究

针对目前AMESim分布式仿真难以确定仿真分布式划分点、无规则划分将进一步降低仿真实时性的难题,以民机协同仿真中的机电系统为研究对象,提出一种基于网络模型和组合赋权法的机电系统协同仿真任务划分方法.首先,利用基于数据分发服务的分布式平台作为通信基础,保证了分布式仿真的同步性.其次,将网络模型的拓扑属性引入民机机电系统协...     

基于无线传感网络的移动机器人通信研究

文章对无线传感网络在机器人设计中的应用进行了研究,提出了一种基于Ad hoc网络的分布式无线令牌环协议的机器人通信系统实现方案,分析了其在机器人通信系统应用中的可行性.文中给出了基于无线传感网络的机器人通信系统的软硬件设计方案,并对其在移动机器人通信系统中的应用问题进行了探讨,最终提出了无线传感器网络应用于移动机器人通信系统的实现方法.     

智能分布式馈线自动化网络闭环仿真测试技术

针对传统配电网分布式馈线自动化网络系统测试存在模型复杂、耗资巨大及兼容性差等问题,提出了一种智能分布式馈线自动化网络闭环仿真测试技术。首先分析了智能分布式馈线自动化网络实现方案,其次在此基础上提出了由RTDS功能模块、放大器模块和智能终端模块组成的闭环仿真测试功能模块,并在RTDS环境中建立了配网分布式馈线自动化系统模型,最后通过闭环仿真测试对智能分布式馈线自动化系统的故障逻辑处理性能进行了验证。     

天线选择对分布式多入多出系统的容量影响研究

通过天线选择可以提高多输入多输出(MIMO)系统的容量,并能有效地降低MIMO系统的复杂度和射频成本.基于连续选择使MIMO系统容量增加最大的天线的方法,用矩阵及行列式运算导出了一种新的接收天线选择算法.将该算法用于分布式MIMO系统的容量研究,通过计算机仿真,结合Rice因子K及不同视距传播条件等因素对分布式MIMO系统上行信道容量的影响进行了研究.仿真结果在分布式无线通信组网及网络优化中具有指导意义.     

分布式网络雷达检测融合处理算法

针对分布式网络雷达的特点,提出将检测融合应用于数据处理系统,给出了检测融合处理算法,并对子网融合的性能进行了仿真。仿真分析表明,将检测融合应用到分布式网络雷达数据处理,对提高系统的探测性能是有效的,尤其是对提高对低空、慢速、小目标的发现概率,有较大的实际意义。     

基于子波滤波的并行分布式检测融合算法分析

将软阈值决策子波域滤波算法与多传感器并行分布式检测融合系统有机地结合在一起,提出了多传感器并行分布式检测系统在Neyman-Pearson(N-P)准则下融合规则和局部判决规则之间相互关系的理论分析方法,完整地给出了两种次最佳系统和全局最佳系统判决规则的理论推导,并藉此理论对以上3种系统进行了瑞利噪声环境下的仿真,结果表明子波域滤波算法和多传感器并行分布式检测融合系统的同时引入明显提高了雷达探测系统的检测性能。     

分布式光伏接入对配电网网络损耗的影响分析

为了明确分布式光伏并网对配电网网络损耗的影响,并给出合理的分布式光伏并网规划方案,首先总结了配电网网损的计算方法,并通过真实配电网作为算例,利用DIgSILENT仿真软件建立了包含光照和温度变化模型的光伏发电系统仿真模型。利用基于分布式光伏发电特性的仿真步长多样化连续潮流计算算法,仿真分析分布式光伏并网系统在不同接入位置和不同接入容量两种情况下系统的网络损耗变化趋势,最终得到了分布式光伏接入后配电网网络损耗的变化规律。该仿真分析结果可为配电网分布式光伏项目的规划建设提供科学的参考依据。     

基于HLA的分布式网络仿真组件的研究实现

针对基于HLA分布式仿真系统中仿真组件的重用,代码共享以及底层网络数据交换的接口不统一和不一致性,同时使得底层通信独立于仿真中间件等问题.提出设计应用于基于HLA分布式仿真系统中底层网络通信的统一接口组件.他独立于HLA分布式仿真系统功能开发,使得开发人员能够集中精力进行仿真功能开发,使各分布Agent能够使用统一接口进行网络协作以及数据交换,并满足分布式仿真系统的实时性要求.     

Resolution Enhancement Technology:Integrated Process Solutions using OPC

DUV lithography, using the 248 nm wavelength, is a viable manufacturing option for devices with features at 130 nm and less. Given the low kl value of the lithography, integrated process development is a necessary method for achieving acceptable process latitude. The application of assist features for rule based OPC requires the simultaneous optimization of the mask, illumination optics and the resist.Described in this paper are the details involved in optimizing each of these aspects for line and space imaging.A reference pitch is first chosen to determine how the optics will be set. The ideal sigma setting is determined by a simple geometrically derived expression. The inner and outer machine settings are determined, in turn,with the simulation of a figure of merit. The maximum value of the response surface of this FOM occurs at the optimal sigma settings. Experimental confirmation of this is shown in the paper.Assist features are used to modify the aerial image of the more isolated images on the mask. The effect that the diffraction of the scattering bars (SBs) has on the image intensity distribution is explained. Rules for determining the size and placement of SBs are also given.Resist is optimized for use with off-axis illumination and assist features. A general explanation of the material' s effect is discussed along with the affect on the through-pitch bias. The paper culminates with the showing of the lithographic results from the fully optimized system.     

Development of the readout system for waveguide multilayer optical card

Waveguide multilayer optical card （WMOC） is a novel storage device of three-dimensional optical information. An advanced readout system fitting for the WMOC is introduced in this paper. The hardware mainly consists of the light source for reading, WMOC, motorized stages addressing unit, microscope imaging unit, CCD detecting unit and PC controlling ＆ processing unit. The movement of the precision motorized stage is controlled by the computer through Visual Basic （VB） language in software. A control panel is also designed to get the layer address and the page address through which the position of the motorized stages can be changed. The WMOC readout system is easy to manage and the readout result is directly displayed on computer monitor.     

Cost-effective test solutions for smart card and other integrated flash applications

From its emergence in the late 1980s as a lower cost alternative to early EEPROM technologies, flash memory has evolved to higher densities and speedsand rapidly growing acceptance in mobile applications.In the process, flash memory devices have placed increased test requirements on manufacturers. Today, as flash device test grows in importance in China, manufacturers face growing pressure for reduced cost-oftest, increased throughput and greater return on investment for test equipment. At the same time, the move to integrated flash packages for contactless smart card applications adds a significant further challenge to manufacturers seeking rapid, low-cost test.     

An improved parallel thinning algorithm with two subiterations

The parallel thinning algorithm with two subiterations is improved in this paper. By analyzing the notions of connected components and passes, a conclusion is drawn that the number of passes and the number of eight-connected components are equal. Then the expression of the number of eight-connected components is obtained which replaces the old one in the algorithm. And a reserving condition is proposed by experiments, which alleviates the excess deletion where a diagonal line and a beeline intersect. The experimental results demonstrate that the thinned curve is almost located in the middle of the original curve connectivelv with single pixel width and the processing speed is high.     

Theoretical analysis of the relationship between the Brillouin gain coefficient and the strain in the optical-fiber sensors

The relation between the power of the Brillouin signal and the strain is one of the bases of the distributed fiber sensors of temperature and strain. The coefficient of the Bfillouin gain can be changed by the temperature and the strain that will affect the power of the Brillouin scattering. The relation between the change of the Brillouin gain coefficient and the strain is thought to be linear by many researchers. However, it is not always linear based on the theoretical analysis and numerical simulation. Therefore, errors will be caused if the relation between the change of the Brillouin gain coefficient and the strain is regarded as to be linear approximately for measuring the temperature and the strain. For this reason, the influence of the parameters on the Brillouin gain coefficient is proposed through theoretical analysis and numerical simulation.     

Novel fiber-optical interferometer with miniaturized probe for in-hole measurements

Today, micro-system technology and the development of new MEMS （Micro-Electro-Mechanical Systems） are emerging rapidly. In order for this development to become a success in the long run, measurement systems have to ensure product quality. Most often, MEMS have to be tested by means of functionality or destructive tests. One reason for this is that there are no suitable systems or sensing probes available which can be used for the measurement of quasi inaccessible features like small holes or cavities. We present a measurement system that could be used for these kinds of measurements. The system combines a fiber optical, miniaturized sensing probe with low-coherence interferometry, so that absolute distance measurements with nanometer accuracy are possible.     

Study of waveguide coupling efficiency in hybrid silicon lasers

This paper presents a new method to increase the waveguide coupling efficiency in hybrid silicon lasers. We find that the propagation constant of the InGaAsP emitting layer can be equal to that of the Si resonant layer through improving the design size of the InP waveguide. The coupling power achieves 42% of the total power in the hybrid lasers when the thickness of the bonding layer is 100 nm. Our result is very close to 50% of the total power reported by Intel when the thickness of the thin bonding layer is less than 5 nm. Therefore, our invariable coupling power technique is simpler than Intel＇s.     

A method for calculating the center position of collimated light

It is a key problem to accurately calculate beam spots＇ center of measuring the warp by using a collimated laser. A new method, named double geometrical center method （DGCM）, is put forward for the first time. In this method, a plane wave perpendicularly irradiates an aperture stop, and a charge couple device （CCD） is employed to receive the diffraction-beam spots, then the geometrical centers of the fast and the second diffraction-beam spots are calculated respectively, and their mean value is regarded as the center of datum beam. In face of such adverse instances as laser intension distributing defectively, part of the image being saturated, this method can still work well. What＇s more, this method can detect whether an unacceptable error exits in the courses of image receiving, processing and calculating. The experimental results indicate the precision of this method is high.     

Collinear phase-matching study of terahertz-wave generation via difference frequency mixed in GaAs and Inp

The collinearly phase-matching condition of terahertz-wave generation via difference frequency mixed in GaAs and InP is theoretically studied. In collinear phase-matching, the optimum phase-matching wave hands of these two crystals are calculated. The optimum phase-matching wave bands in GaAs and lnP are 0.95-1.38μm and 0.7-0.96μm respectively. The influence of the wavelength choice of the pump wave on the coherent length in THz-wave tuning is also discussed. The influence of the temperature alteration on the phase-matching and the temperature tuning properties in GaAs crystal are calculated and analyzed. It can serve for the following experiments as a theoretical evidence and a reference as well.     

Effects of the alloy compositions on the phonon-polaritons in ternary mixed crystals

Composition dependence of bulk and surface phonon-polaritons in ternary mixed crystals are studied in the framework of the modified random-element-isodisplacement model and the Bom-Huang approximation. The numerical results for Several Ⅱ - Ⅵ and Ⅲ- Ⅴ compound systems are performed, and the polariton frequencies as functions of the compositions for ternary mixed crystals AlxGa1-xAs, GaPxAS1-x, ZnSxSe1-x, GaAsxSb1-x, GaxIn1-xP, and ZnxCd1-xS as examples are given and discussed. The results show that the dependence of the energies of two branches of bulk phonon-polaritons which have phonon-like characteristics, and surface phonon-polaritons on the compositions of ternary mixed crystals are nonlinear and different from those of the corresponding binary systems.