多无源传感器之属性信息数据关联的规则与结构模型

属性信息具有提高数据关联算法性能的巨大潜力,是多无源传感器信息数据关联研究的趋势之一。对属性信息在多无源传感器数据关联问题中的应用进行了综述,分析了基于属性信息的数据关联问题的研究进展,抽象出属性信息应用的问题模型,给出了基于统计、不确定推理的属性信息关联规则,总结了属性信息应用于多无源传感器数据关联的处理结构模型,并比较了各处理结构的优缺点,最后指出了未来属性信息辅助数据关联要解决的关键问题。     

无源多传感器多目标融合的关联算法研究

无源多传感器多目标融合在信息融合技术中具有非常重要的意义,而测量数据的关联问题则是其中的一个关键问题。本文从实际的工程研究入手,探寻无源多传感器多目标融合的关联算法。首先基于目标属性参数进行关联,再对已定位目标进行位置相关,最后通过模糊评估获得最佳关联目标。     

基于综合相关判别的无源航迹关联算法

航迹关联是多目标航迹处理中的重要问题,综合利用无源传感器获取的其他信息是改善航迹关联的重要途径。利用辐射源航迹得到正确的目标关联航迹较困难,因此,提出了一种辐射源航迹自关联和目标平台航迹互关联的两步关联综合相关判别算法,在充分运用无源传感器获取到的角度信息的同时,利用丰富的综合属性信息对航迹进行关联。仿真结果表明,该算法能够有效解决多无源传感器的航迹关联问题,并且有较高的关联正确概率。     

多源置信综合的雷达与ESM协同跟踪方法

跟踪空间邻近目标时，仅依靠运动学信息不足以实现可靠的数据关联，而基于动目标指示器（Moving Target Indicator，MTI）雷达和电子支援措施（Electronic Support Measurement，ESM）的多源异类传感器数据融合可以通过提升数据关联性能达到改善跟踪性能的目的。通过构建基于五种成比例再分配规则（Five Proportional Conflict Redistribution Rules，PCR5）置信度量的数据关联策略，将目标运动学信息和属性信息结合做多特征推理，解决异类传感器数据的不确定性和不一致性；利用Dempster-Shafer（DS）证据理论方法进行属性融合更新，完成属性信息在时间序列上的相干积累，实现空间邻近目标的可靠跟踪。该方法从数据关联和状态估计两方面联合进行改进，通过引入属性信息提升数据关联的正确性，从而提升跟踪性能，实现多源异类信息下的协同跟踪。仿真表明，相比于仅雷达跟踪、雷达和ESM序惯跟踪等方案，该方法可有效提升跟踪精度和关联性能。     

基于灰关联无源多目标跟踪系统航迹关联算法

目前分布式无源多目标跟踪系统的航迹关联算法基本上照搬多传感器数据融合的理论,仅利用目标的状态信息.文中利用了目标的多特征信息(载频、脉宽、脉冲重复间隔等),应用灰关联理论,提出了一种基于灰关联的分布式无源多目标跟踪系统的航迹关联算法.由于利用了目标多特征信息,算法具有关联速度快、正确率高、而且能够适应密集目标环境的优点.仿真实验证明该算法的航迹关联效果明显优于加权航迹关联算法.     

多目标纯方位定位和跟踪

当采用多个无源传感器对多个目标进行测向交叉定位时 ,首先需要考虑的是各个无源传感器之间的测量同步问题 ,通过上述问题以及复杂环境下的方位数据关联、目标位置信息融合等问题的研究 ,建立了复杂环境下多站多目标、纯方位和跟踪的数学模型 ,并通过仿真分析验证了该模型的可行性和有效性。     

基于D-S证据理论的无源航迹关联算法

目前分布式无源多目标跟踪系统的航迹关联算法基本照搬多传感器数据融合的理论,仅利用目标的状态信息。文中利用了目标的多特征信息（载频、脉宽、脉冲重复间隔（PRI）等）,应用Dempster-Shafer（D-S）证据理论,提出了一种基于分布式无源多目标跟踪系统的多特征信息融合航迹关联算法。算法具有以下优点：关联速度快,正确率高,而且能够适应密集目标的环境。仿真实验证明该算法的航迹关联效果明显优于加权航迹关联算法。     

一种改进的基于模糊聚类分析的数据关联算法

基于模糊聚类分析的无源传感器数据关联中,当目标集合中所有目标的属性差异较小时,通常不能正确得到目标关联结果。论文提出了一种改进的基于模糊聚类分析算法,并对该算法进行了推导和仿真。仿真试验结果表明该算法能有效解决辐射源特征值取值接近或单目标环境中的属性关联问题。     

基于软件架构设计的多源信息融合系统

以往对多源信息融合系统的研究大多是基于某种算法,针对某一层级或某一类传感器数据的特征信息进行分析、处理和综合。为优化多源信息融合系统综合处理及集成能力,针对多级多源信息融合处理系统进行领域工程分析,提出了该领域的通用软件架构模型,对软件构件化技术在多级多源信息融合系统中的应用进行了初步探索。     

一种基于GA的无源交叉定位数据关联算法

针对多站无源测向交叉定位的多目标辐射源数据关联问题,提出了一种基于遗传算法的无源多站多目标交叉定位数据关联算法。利用遗传算法在解决组合优化中NP问题的优势,将遗传算法引入到数据关联算法的求解过程中,对基于残差的数据关联算法进行了优化改进,给出了求解步骤。仿真结果表明,在考虑虚警和漏检的情况下,由于遗传算法充分利用了全局信息,所以基于遗传算法的数据关联算法能以较快的速度实现收敛,并且正确关联率明显提高,从而能够更有效地分辨真实目标和虚假目标。     

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.     

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.     

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.     

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.     

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.     

Teleportation of an arbitrary unknown N-qubit entangled state under the controlling of M controllers

A new quantum protocol to teleport an arbitrary unknown N-qubit entangled state from a sender to a fixed receiver under M controllers(M < N) is proposed. The quantum resources required are M non-maximally entangled Greenberger-Home-Zeilinger (GHZ) state and N-M non-maximally entangled Einstein-Podolsky-Rosen (EPR) pairs. The sender performs N generalized Bell-state measurements on the 2N particles. Controllers take M single-particle measurement along x-axis, and the receiver needs to introduce one auxiliary two-level particle to extract quantum information probabilistically with the fidelity unit if controllers cooperate with it.     

Diode-end-pumped Nd:YVO4/LBO lasers with 4.2W continuous-wave output at 457 nm

A continuous-wave (CW) 457 nm blue laser operating at the power of 4.2 W is demonstrated by using a fiber coupled laser diode module pumped Nd: YVO4 and using LBO as the intra-cavity SHG crystal With the optimization of laser cavity and crystal parameters, the laser operates at a very high efficiency. When the pumping power is about 31 W, the output at 457nm reaches 4.2 W, and the optical to optical conversion efficiency is about 13.5% accordingly. The stability of the out putpower is better than 1.2% for 8 h continuously working.     

A rigorous proof of MIMO channel capacity’s increase with antenna number

It is well known that adding more antennas at the transmitter or at the receiver may offer larger channel capacity in the multiple-input multiple-output（MIMO） communication systems. In this letter, a simple proof is presented for the fact that the channel capacity increases with an increase in the number of receiving antennas. The proof is based on the famous capacity formula of Foschini and Gans with matrix theory.     

Call for Papers

正Wireless Body-area Networks The last decade has witnessed the convergence of three giant worlds:electronics,computer science and telecommunications.The next decade should follow this convergence in most of our activities with the generalization of sensor networks.In particular with the progress in medicine,people live longer and the aging of population will push the development of wireless personal networks