凝视热成像系统MTF测试技术分析

概述了目前进行高成像系统ＭＴＦ测试的几个主要方法，着重分析了其中的斜缝法和激光散斑法各自解决问题的工作原理，技术特点及技术关键，指出，对于凝视成像系统的ＭＴＦ测试，这是两种比较值得研究和推广的技术。     

Photons in the Non－uniform Optical Waveguide Propagate along z－axis in Spiral Form

ＰｈｏｔｏｎｓｉｎｔｈｅＮｏｎ－ｕｎｉｆｏｒｍＯｐｔｉｃａｌＷａｖｅｇｕｉｄｅＰｒｏｐａｇａｔｅａｌｏｎｇｚ－ａｘｉｓｉｎＳｐｉｒａｌＦｏｒｍ￥ＺＨＡＮＧＪｉｎｗｅｉ（ＪｉｎａｎＵｎｉｖｅｒｓｉｔｙ，Ｇｕａｎｇｚｈｏｕ５１０６３２，ＣＨＮ）Ａｂｓｔｒ...     

一种用于DS扩频信号非相干检测的差分延迟SAW相关器

本文介绍了用于ＤＰＳＫ调制的ＤＳ扩频信号非相干检测的一种ＳＡＷ器件的设计方法。对所研究的差分延迟功能均集于单一器件中。因为没有采用独立的延迟线，故消除了带限影响，ＤＰＳＫ解调器延迟支路无插入损耗。     

RECOGNITION OF MODULATION SYSTEM IN COMMUNICATION

Recognition of modulation system is an important problem in the modern electronicreconnaissance.A general method for solving this problem is suggested in this paper.From asegment of a captured signal we can determine the modulation system and extract its parameterwith this method.The theoretical basis,algorithms and test results of this method are described.It has been proved that the method is very effective in practical situation.     

本征吸除硅片特性研究

本文描述硅本征吸杂片的特性参数,如吸除区宽度、洁净度,氧沉淀密度、MOS电容寿命,介绍了表面态密度及残余间隙氧浓度的检测方法和工艺对参数的影响及参数之间的内在联系,文章还实验论证了不同参数水平对器件成品率的影响,建立了以MOS电容寿命为主导的参数控制方法,利用本文提供的控制参数,可使CCD-512器件成品率达60％,以上优品率≥85％。     

射频电流对桥丝式电雷管安全性与可靠性影响数值计算

为了研究射频电流对桥丝式电雷管在贮存与使用过程中可能出现的意外发火、迟发火与瞎火现象,选取了一种桥丝式电雷管进行热分析数值计算.首先建立了热分析的数理模型,然后根据所建立的模型对电雷管接受射频电流作用后药剂的性能变化进行了计算.确定了所研究的电雷管在受到0.09A以上电流作用时,出现意外发火现象,影响其贮存安全性;在受到0.08A以下电流作用时,出现迟发火与瞎火现象,影响其使用可靠性.     

基于PMS的装备作战单元复杂任务可靠性研究

多阶段任务系统(PMS)指包含具有时间连续且不相覆盖的基本任务阶段,分为静态和动态阶段任务系统.基于PMS理论及可用度和可信度,可建立包含可修与不可修复杂任务的任务可靠性模型.即按时序将任务分为阶段,分别建立各阶段的任务可靠性模型,根据条件概率法将各阶段的模型综合,并用稳态可用度近似代替瞬时可用度,最后得出复杂任务的可靠性模型.     

Experimental Study of RF-excited Diffusion Cooled Off-axis Unstable Resonator with High Frequency Modulation in a Waveguide CO2 Laser

The experimental study of the laser beam parameters of the pulse repetitive RF-excited diffusion cooled waveguide CO2 laser are presented. The measurements are carried out for the pumping pulse duration of 100 μs and pulse repetitive rates 5 - 14 kHz. The average power density delivered to the active medium is 76 W/cm^3. Three types of the pulses, namely the square, the sine and the triangular ones have been applied at the input as pumping pulses and their effects on the output power and the delay time have been studied. The output power of the radiation versus input power, pressure of the laser gas mixture and modulation frequency has been investigated. The results indicate that the output peak power for the three types of pulses increases with increase of the pressure of the laser gas mixture and with the input power where as it decreases with the repetition frequency. The delay time of the output pulse decreases with the increase of the repetition frequency and input power, where as it increases with the increase of the pressure of the laser gas mixture. The behavior of the output power and the delay time with duty cycle for square pulse has also been investigated.     

南水北调调蓄工程经济性的探讨

用于调节南水北调工程来水的有两类水库，在这两类水库中，一类为已建水库，位于南水北调中线以西较高位置，叫做“高库”，例如黄壁庄水库；另一类为拟建水库，位于中线以东平原洼地，也叫“低库”，以大浪淀水库为例．技术经济指标分析表明，第一类水库的供水成本明显小于后者，故得出如下结论：利用某些已建“高库”的闲置库容调节南水北调来水可能是经济的．     

小浪底地区总体规划方案构思

随着小浪底水利枢纽工程建设的进展，如何将小浪底地区建设成为一个以水利工程为主体、富有特色的新型居民点，将是该地区发展中的一个战略性问题。本文从分析小浪底地区的功能性质、规模、环境特点入手，对该地区的规划结构、布局形态、风景资源开发和景物景区的组织提出了总体构思，并对建设过程中远近期结合问题，提出了建设性的设想。