防空武器多层混合部署优化研究

以排队论为基础，建立了不同类型防空武器多层防御射击效能的计算模型。通过实例仿真计算，推测出毁伤概率对混合部署射击效能的影响规律，从而得出防空武器多层混合部署的优化依据，并加以证明。     

毫米波相阵技术在大闭环防空反导武器系统中的应用

近程防空武器系统(CIWS)由于它在防空反导方面具有无法替代的优点而越来越受到重视.目前西方先进国家这类武器系统已装备了十几种型号,还仍在不断研制新的型号.从长远看,未来型的防空反导武器系统必然是综合系统,即将不同作用距离的导弹与小口径高射速高炮结合起来,组成不同层次的几道防线以可靠地降低敌方导弹和飞机的突防概率.文中就 CIWS对雷达的特殊要求进行了分析,并对用相阵与毫米波技术实现这些要求的关键问题作了介绍.     

基于蒙特卡洛的高炮射击毁歼概率仿真

针对具体要地防空高炮射击环节,详细分析了射击误差模型,应用蒙特卡洛方法仿真了高炮射击过程,提出了高炮射击仿真的程序逻辑方案;并结合具体实例,得出仿真数据,定量分析了高炮射击毁伤概率.仿真结果比较符合实际防空情况,具有一定的实际应用价值,其分析问题解决问题的方法和过程对解决类似的问题有一定的借鉴意义.     

低截获概率火控系统的设计

反辐射导弹技术的快速发展,给防空系统中的各种辐射源造成极大的威胁,火控系统采用低截获概率技术可以极大的提高武器系统的作战有效性和生存能力.该文论述低截获概率的原理和关键技术,探讨了一种新型火控系统的低截获概率设计方法.     

舰载雷达发现目标的效能概率

舰载雷达发现目标的效能概率是表征舰载雷达保障武器系统完成某一单项作战任务的重要指标之一。首先研究了舰载雷达能够保障舰炮射击时发现目标的效能 ,并给出了效能概率的计算方法 ,然后就典型的雷达保障舰炮射击情况作了定量数学计算 ,计算结果表明 ,该算法是有效的 ,其结果对于提高舰载雷达的作战效能具有重要应用价值。     

弹炮结合防空武器系统可用性分析

可用性是构成弹炮结合防空武器系统作战效能、并影响其全寿命周期费用的重要因素,是弹炮结合防空武器系统战术技术指标的重要组成部分。本文分析了影响弹炮结合武器系统可用性的各种因素,建立弹炮结合系统在各种状态下的可用度数学模型,并且讨论了影响弹炮结合武器系统可用度的各要素之间的相互关系。以某型弹炮结合防空武器系统为例,对可用性进行了分析计算,应用证明模型的科学性。     

舰艇电子防空与火力防空电磁兼容性研究

综合采用电子防空和火力防空抑制和破坏反舰导弹的攻击,对于提高水面舰艇的生存能力具有重要的意义。从空域、时域和频域3个方面对舰艇防空武器系统的电磁兼容性进行了分析,并依据舰艇电子防空与火力防空力量的使用原则,提出了舰载防空武器系统协同使用的具体流程。     

便携式防空导弹武器系统可靠性分析与设计

可靠性是衡量武器系统性能的一项重要指标,也是影响系统效能的重要因素.在阐述可靠性及可靠性模型等基本概念的基础上,建立便携式防空导弹武器系统的可靠性模型,从可靠性设计的具体要求出发,结合便携式防空导弹武器系统组成及使用特点,提出了系统可靠性的量化评估模型和提高系统可靠性的设计方法,对提高便携式防空导弹武器系统可靠性和系统...     

弹炮结合防空武器系统的发展趋势

本文简要介绍了体系对抗的发展趋势、中国国情、弹炮结合防空武器系统的作战使命,以此为基础,提出了弹炮结合防空武器系统的发展建议。     

高炮防空武器系统部署与毁歼概率

高炮防空武器毁歼来犯敌机的概率绝不会始终是一个定值.这种概率随着多种因素变化而变化,但通过对武器单元的精心部署,射击时机、次数的精确计算,则可高概率地命中敌机.毁歼概率定义为一个点射命中目标的可能性;一般以百分数表示.对于一个高炮系统,影响毁歼概率的主要因素有:     

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.     

Curved crystal spectrometer for the measurement of X-ray lines from laser-produced plasmas

In order to diagnose the laser-produced plasmas, a focusing curved crystal spectrometer has been developed for measuring the X-ray lines radiated from a laser-produced plasmas. The design is based on the fact that the ray emitted from a source located at one focus of an ellipse will converge on the other focus by the reflection of the elliptical surface. The focal length and the eccentricity of the ellipse are 1350 mm and 0.9586, respectively. The spectrometer can be used to measure the X- ray lines in the wavelength range of 0.2-0.37 nm, and a LiF crystal （200） （2d = 0.4027 nm） is used as dispersive element covering Bragg angle from 30° to 67.5°. The spectrometer was tested on Shengnang- Ⅱ which can deliver laser energy of 60-80 J/pulse and the laser wavelength is 0.35 μm. Photographs of spectra including the 1 s2p ^1P1-1s^2 ^1S0 resonance line（w）, the 1s2p ^3P2-1s^2 1S0 magnetic quadrupole line（x）, the 1s2p ^3P1-1 s^2 ^1S0 intercombination lines（y）, the 1 s2p ^3S~1-1 s^2 ^1S0 forbidden line（z） in helium-like Ti Ⅹ Ⅺ and the 1 s2s2p ^2P3/2-1 s622s ^2S1/2 line（q） in lithium-like Ti Ⅹ Ⅹhave been recorded with a X-ray CCD camera. The experimental result shows that the wavelength resolution（λ/△ 2） is above 1000 and the elliptical crystal spectrometer is suitable for X-ray spectroscopy.     

Preparation and Characterization of TaN ALD Precursors

High purity organic-tantalum precursors for thin film ALD TaN were synthesized and characterized.Vapor pressure and thermal stability of these precursors were studied.From the vapor pressure analysis,it was found that TBTEMT has a higher vapor pressure than any other published liquid TaN precursor,including TBTDET,TAITMATA,and IPTDET.Thermal stability of the alkyl groups on the precursors was investigated using a 1H NMR technique.The results indicated that the tertbutylimino group is the most stable group on TBTDET and TBTEMT as compared to the dialkylamido groups.Thermal stability of TaN precursors decreased in the following order:TBTDET ＞ PDMAT ＞ TBTEMT.In conclusion,precursor vapor pressure and thermal stability were tuned by making slight variations in the ligand sphere around the metal center.     

Electronic Structure of Semiconductor Nanocrystals

This paper reviews our recent development of the use of the large-scale pseudopotential method to calculate the electronic structure of semiconductor nanocrystals, such as quantum dots and wires, which often contain tens of thousands of atoms. The calculated size-dependent exciton energies and absorption spectra of quantum dots and wires are in good agreement with experiments. We show that the electronic structure of a nanocrystal can be tuned not only by its size,but also by its shape. Finally,we show that defect properties in quantum dots can be significantly different from those in bulk semiconductors.     

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.     

Critical Stage Rule-Based Real Time Dispatch（RTD）System in Highly-Mixed-Products （HMP） FAB

An improving utilization and efficiency of critical equipments in semiconductor wafer fabrication facilities are concerned. Semiconductor manufacturing FAB is one of the most complicated and cost sensitive environments. A good dispatching tool will make big difference in equipment utilization and FAB output as a whole. The equipment in this paper is In-Line DUV Scanner. There are many factors impacting utilization and output on this equipment group. In HMP environment one of the issues is changing of reticule in this area and idle counts due to load unbalance between equipments. Here we'll introduce a rule-based RTD system which aiming at decreasing the number of recipe change and idle counts among a group of scanner equipment in a high-mixed-products FAB.     

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.