铜(Ⅱ)-头孢唑啉钠络合物吸附波的研究与应用

在pHl0的NH3-NH4C1缓冲溶液中，Cu(Ⅱ)-头孢唑啉钠络合物在单扫描示波极谱仪上产生一灵敏的还原峰，其一次导数峰电位为-0．30V(vs．SCE)，峰电流与铜浓度在0．005—0．3mg／L范围内呈线性关系，检出限为0．0025mg／L。将该波用于人发及硫酸镍中铜含量的测定，并就极谱波的性质进行了探讨。     

射频强场电磁环境试验系统可行性研究

从高技术战争特点和我军武器装备发展需要出发，论述了建设射频强场电磁环境试验系统的必要性。从射频功率产生系统和射频场形成装置两方面，详细分析了在实验室内和野外电磁环境试验场建设射频强场电磁环境试验系统的技术可行性，计算确定了射频宽带功率放大器的技术指标，配置了辐射天线并进行了选型分析。结果表明：建设200V／m以上的射频强场电磁环境试验系统，满足武器装备电磁环境效应试验的需要具有技术可行性和经济合理性。     

双积分A/D转换器工作原理的演示实验装置的设计

选用基本元件设计一种实验电路装置，通过各关键点时序波形观测，展示双积分式A／D转换器工作原理。     

组合KdV方程的齐次平衡法求解

利用齐次平衡方法研究了组合KdV方程ut auux 6u^2ux uxxx=0的孤波解结构，并给出了它的扭结型孤波解。     

流体媒质界面上半波损失问题的讨论

本文主要是利用流体媒质界面处速度和能流的连续性边界条件,定量地分析,研究弹性纵波在界面处的半波损失问题。通过分析、研究,得出了弹性纵波有无半波损失的正确判据,及“入射波由波阻小的媒质射入波阻大的媒质,界面处反射波存在半波损失”不是普遍成立的结论。     

从权威到民主——简析二战后韩国政治变迁

韩国于1948年5月5日建国,并于同年8月15日建立了李承晚政府。由于李承晚政府统治腐败,引发了1961年5月16日的军人政变,从此韩国开始了军人权威统治。在朴正熙军人集团统治期间,韩国经济高速发展。经济的进步推动了社会全面进步,同时也动摇了权威统治的基础。在20世纪后期的民主化浪潮的推动下,韩国实现了由权威统治向民主的过渡。1992年底金泳三当选总统,标志着韩国民主化进程的完成。     

印制电路板的电磁兼容问题研究

主要介绍了在设计印制电路板时需要考虑的电磁兼容问题，并说明产生问题的原因。     

Synthesized Multi-Method to Detect and Classify Epileptic Waves in EEG

In order to sufficiently exploit the advantages of different signal processing methods, such as wavelet transformation (WT), artificial neural networks (ANN) and expert rules (ER), a synthesized multi-method was introduced to detect and classify the epileptic waves in the EEG data. Using this method, at first, the epileptic waves were detected from pre-processed EEG data at different scales by WT, then the characteristic parameters of the chosen candidates of epileptic waves were extracted and sent into the well-trained ANN to identify and classify the true epileptic waves,and at last, the detected epileptic waves were certificated by ER. The statistic results of detection and classification show that, the synthesized multi-method has a good capacity to extract signal features and to shield the signals from the random noise. This method is especially fit for the analysis of the biomedical signals in biomedical engineering which are usually non-placid and nonlinear.     

Dynamic Responses Analysis of a Building Structure Subjected to Ground Shock from a Tunnel Explosion

Dynamic responses of a multi-storey building without or with a sliding base-isolation device for ground shock induced by an in-tunnel explosion are numerically analyzed. The effect of an adjacent tunnel in between the building and the explosion tunnel, which affects ground shock propagation , is considered in the analysis. Different modeling methods, such as the eight-node equal-parametric finite element and mass-lumped system, are used to establish the coupling model consisting of the two adjacent tunnels, the surrounding soil medium with the Lysmer viscous boundary condition, and the multi-storey building with or without the sliding base-isolation device. In numerical calculations , a continuous friction model, which is different from the traditional Coulomb friction model, is adopted to improve the computational efficiency and reduce the accumulated errors. Some example analyses are subsequently performed to study the response characteristics of the building and the sliding base-isolation device to ground shock. The effect of the adjacent tunnel in between the building and the explosion tunnel on the ground shock wave propagation is also investigated. The final conclusions based on the numerical results will provide some guidance in engineering practice.     

电力系统故障信息及其在继电保护中的应用

综述了电力系统故障信息的种类和小波变换在提取故障分量中的应用；介绍了当前继电保护专家们提出的行波保护、无通道保护等新型保护的基本原理。