ν-SVC分类算法在飞机作战效能评估中的应用

ν-SVC算法是一种新的支持向量机分类算法,该算法根据给定的参数ν自动调整ε,来控制支持向量数目和算法误差.本文应用ν-SVC算法建立了飞机作战效能分类评估模型,并对几种飞机的作战效能进行了分类评估.评估结果与实际相符,表明ν-SVC算法的飞机作战效能分类评估有较高的分类精度.     

机载火控系统效能评估的支持向量机方法

回归型最小二乘支持向量机具有在较少学习样本下建立模型的能力和较强的泛化能力。提出了一种基于最小二乘回归支持向量机的机载火控系统作战效能评估模型。首先分析了影响飞机火控系统作战效能的主要因素,建立了飞机火控系统作战效能评估的指标体系,然后利用支持向量机建立与这些指标之间的非线性映射模型来对飞机火控系统的作战效能进行预测。仿真实例验证了该方法的适用性和结果的可靠性。     

电子侦察卫星作战效能FASSA-SVR评估模型

在电子侦察卫星支援对海作战背景下,为充分发挥卫星作战潜能,提出了基于萤火虫麻雀算法(FASSA)优化支持向量回归(SVR)的卫星作战效能评估模型。首先,运用萤火虫算法(FA)对麻雀搜索算法(SSA)进行改进;然后,建立了电子侦察卫星作战效能评估指标体系;最后,运用FASSA算法优化SVR的相关参数,依据所构建的效能评估指标体系,构建了电子侦察卫星作战效能评估模型。仿真结果表明,该模型具有较高的效能评估精度,在各项指标上均优于其他模型。     

基于支持向量机的雷达网抗干扰效能评估

为了评价作战环境下雷达网的抗干扰能力,以雷达网的各项评估指标及其相对应的量值作为样本,应用支持向量机的预测分类能力对相应的样本做出效能评估预测,实现了对雷达网抗干扰能力的评估。同时与基于模糊物元分析法的结果做相应的对比可看出,基于支持向量机的计算速度快、泛化能力强、评估结果准确等特点。     

对抗条件下双机编队空-地作战效能评估

双机编队是空防对抗中一种主要的编队模式。在对单机空 地作战效能评估的同时,对双机编队空 地作战效能进行了评估,构造了对抗条件下双机编队空 地作战效能评估的解析模型,是飞机作战效能评估方法的再次拓展,最后用实例证明了模型的正确性。     

基于最小二乘支持向量机的飞机备件多元分类

飞机后续备件配置直接关系到装备的战备完好率和寿命周期费用,对备件的正确分类是进行备件配置决策的前提。支持向量机是采用结构风险最小化原则代替传统统计学中的基于大样本的经验风险最小化原则的新型机器学习方法,具有出色的学习分类能力和推广能力。研究了新型支持向量机算法-最小二乘支持向量机,设计了基于多元分类的最小二乘支持向量机,在此基础上,建立了飞机备件多元分类模型,并对某机型的备件进行了分类。结果表明,基于最小二乘支持向量机的飞机备件多元分类方法是有效、可行的。     

基才SVM的输电线路故障选相新方法

故障选相元件是高压输电线路继电保护和单相重合闸的重要组成部分,基于SVM（支持向量机）提出了一种输电线路故障选相新方法。通过提取故障时各序基波电流、电压的信号特征量,结合LS—SVM（最小二乘支持向量机）,将其应用到选相过程中暂态信号的训练和分类上,先将特征量送到SVC（支持向量分类）函数中计算出SVM的参数值后,送到...     

改进SVC算法在雷达信号分选中的应用

为提高支持向量聚类（SVC）对分布复杂、不均匀雷达辐射源信号样本分选的正确率,提出一种改进的支持向量聚类分选方法,先采用支持向量聚类对所有未知样本作预分类,提供初始的聚类中心,然后利用K-Means聚类分选算法最终分选。结果表明,此方法能够很好地对复杂雷达信号进行分选,分选正确率较高。     

某型歼击机远距导航效能的计算

导航效能是影响飞机总体作战效能的关键因素之一。本文研究了某型歼击机导航阶段的导航效能模型，给出了导航效能的计算方法和程序框图，为最终评估歼击机的综合作战效能提供理论依据。     

基于模糊层次分析法评估作战飞机的对地攻击效能

作战飞机效能评估在作战飞机设计及其作战运用中具有重要作用。本文针对现代空地作战过程体现的动态性,提出作战飞机对地攻击效能评估的方法,利用影响对地攻击效果的指标量进行建模与分析。在建模过程中,对指标量建立分级评估的框架模型,利用二级模糊综合评判对效能进行评估。经计算机仿真实验,得到较好的结果。     

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