建立三维因子结构选择cai模式

本文对当前教学中各种主要的cai模式进行了分析比较，阐析了它们的特点及其所起的不同作用与功能。在此基础上，从教育心理学角度提出了依据认知目标、学生知识背景、教学组织形式三要素选择恰当cai模式的可操作性方法。     

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。     

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。     

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.     

超声雾化治疗慢性咽炎的疗效观察

采用超声雾化吸入治疗具有药物直达炎症部分,局部易吸收等作用,从而减少药物的用量,降低毒副作用.     

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。     

2+1维破切孤子方程的分支和行波解(英文)

运用动力系统原理研究2+1维破切孤子方程的行波解,得到了参数空间不同区域上所有可能的精确解.     

玻色--爱因斯坦凝聚研究

本文用最速下降法研究了玻色-爱因斯坦凝聚体的波函数和化学势，通过研究得出了T=0时凝聚体的形状、波函数随粒子数增大的变化规律以及化学势与粒子数间的关系。