共查询到20条相似文献,搜索用时 78 毫秒
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利用有色Petri网(CPN)建模工具,得到了舰艇编队指挥、控制、通信及情报(C3I)系统的可行结构空间,同时结合CPN Tools得到了匹配测度模型,进而得出面向作战任务的舰艇编队C3I系统结构优化匹配模型,最后给出了实例应用,得到了某编队C3I系统的最优匹配结构.提出的方法操作简单,通用性强,为舰艇编队C3I系统结... 相似文献
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在网络中心战的大背景下,对舰艇内部信息融合的需求显著提高。通过对舰艇内部通信网络技术现状的分析和商用主流综合传送网技术的比较,深入探讨了PTN分组传送网技术在舰艇内部综合通信平台中的应用。 相似文献
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《电子科技文摘》2006,(12)
水面舰艇编队对敌舰艇反导防御观察组织[刊,中]/孔令富//指挥控制与仿真.-2006,28(5).-56-59(L)针对反导防御对海观察组织的特点和水面舰艇编队在反导防御观察系统中的作战任务.运用定性定量分析法,得到了对敌水面舰艇编队反导防御观察区域与观察系统工作时间的计算模型。结合该模型与舰艇编队战术使用理论,探讨了海上对敌编队反导防御观察的组织方法,为水面舰艇的综合反导防御作战提供有价值的理论依据。参4基于云理论的预警探测系统作战效能评价[刊,中]/李春荣//电子信息对抗技术.-2006,21(5).-36-39(G)科学评价预警探测系统作战效能是指导其发展建设的重要基础。本文通过建立预警探测系统作战效能模型,确定了评价指标,尝试采用云重心评价方法对预警探测系统的作战效能进行评价。参3 相似文献
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网络中心战及网格技术 总被引:1,自引:0,他引:1
网格技术是实现网络中心战的基础。概述了美国海军提出的网络中心战概念,介绍了由信息网、探测网、作战网和指挥网4个虚拟网组成的网络中心战作战结构和由CEC、Link-16和IT-21技术组成的技术结构,提出了实现网络中心战的一些难点问题。 相似文献
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论述了水面舰艇编队在现代反导作战中面临的挑战,对无人机在水面舰艇编队反导作战中使用方法进行了探讨。对无人机在水面舰艇编队反导作战中的使用进行了初步探讨,总结了一些方法和原则。 相似文献
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为提高舰艇编队多站无源时差定位(TDOA)精度,必须解决水面舰艇平台间高精度的测距和时间同步问题。研究分析了几种时间同步技术,提出一种适用于舰艇编队的改进型双向比对时间同步控制技术,通过仿真实验得到舰艇间时间同步误差在7.5ns以内,测距精度在2.5m内。 相似文献
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水面舰艇编队雷达探测网络研究 总被引:6,自引:1,他引:5
简要论述了舰载雷达在信息战条件下所面临的挑战,在分析了国外的舰艇编队的舰载雷达系统的基础上,对我国水面舰艇编队的舰载雷达系统的发展思路进行了探讨。 相似文献
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Thomas M.Trexler 《半导体技术》2004,29(5)
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. 相似文献
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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. 相似文献
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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. 相似文献
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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. 相似文献
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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. 相似文献
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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. 相似文献
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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. 相似文献
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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. 相似文献
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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. 相似文献
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YUXiao-hua XIANGYu-qun 《半导体技术》2005,30(2):30-32,37
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. 相似文献