Reflection and Transmission of the Level Step to the Waves in a Linear and Continuous Layer Liquid

1 Introduction Owing to the hot radiation of the sun, the den- sity distribution of water is usually perpendicular in actual oceans and river bayoux. The source of the disturbance will not only produce water waves of a surface mode, but also of an internal mode[1–2]. In layered liquids the internal mode will induce some dynamic water phenomena which are different from those in the single layer liquid[3]. Considering the propagation of waves in deep upheaval terrain, the problem can be simplif…     

基于VB6．0和串口无线通信的直流电机控制

利用VB6．0语言编程实现对机器人上直流伺服电机的控制，从而实现机器人的加速和恒速运行。分别将两块接口为标准的RS-232接口、型号为ZT—TR43C的无线数传模块，接到发、收的两台PC机上，并利用VB通信控件MSCommon实现串口无线通信，从而实现机器人的远程无线控制。实践证明了该无线控制方法的可行性，为机器人控制搭建了很好的平台。     

基于改进SPIHT的静态图像编码

本文在零树编码算法分析的基础上,针对SPIHT算法的不足,提出了一种新的零树编码算法。该算法以SPIHT为基础,改进了其零树结构及编码流程,同时引入LZC算法的标志位图思想,在保证恢复图像质量的前提下,降低了内存消耗,提高了编解码速度。仿真实验结果表明,相对于SPIHT算法而言,重构图像的峰值信噪比和直观图像质量,本文算法都表现出了优良的性能,尤其是在低比特率下表现跟明显。     

A fuzzy Actor-Critic reinforcement learning network

One of the difficulties encountered in the application of reinforcement learning methods to real-world problems is their limited ability to cope with large-scale or continuous spaces. In order to solve the curse of the dimensionality problem, resulting from making continuous state or action spaces discrete, a new fuzzy Actor-Critic reinforcement learning network (FACRLN) based on a fuzzy radial basis function (FRBF) neural network is proposed. The architecture of FACRLN is realized by a four-layer FRBF neural network that is used to approximate both the action value function of the Actor and the state value function of the Critic simultaneously. The Actor and the Critic networks share the input, rule and normalized layers of the FRBF network, which can reduce the demands for storage space from the learning system and avoid repeated computations for the outputs of the rule units. Moreover, the FRBF network is able to adjust its structure and parameters in an adaptive way with a novel self-organizing approach according to the complexity of the task and the progress in learning, which ensures an economic size of the network. Experimental studies concerning a cart-pole balancing control illustrate the performance and applicability of the proposed FACRLN.     

城市道路交叉系统的灰色物元评价

将灰色物元评价方法应用于城市道路交叉系统评价,分析了城市道路交叉系统的影响因素,建立了城市道路交叉系统评价的灰色物元评价模型.实例采用Visual Basic编程计算,经分析表明,灰色物元评价法能够比较简明确切地反映出城市道路交叉系统状况.     

教师教学质量综合评价模型

教师教学质量的评价对提高教学质量具有十分重要的意义.为整体评价教师教学质量,提出了教师教学质量评价指标体系,利用层次分析法对各指标的权重进行计算,建立了教师教学质量综合评价模型.     

采煤数据仓库的设计与实现

数据仓库是煤矿企业生产经营决策支持系统的重要组成部分.文章介绍了一个采煤数据仓库系统,给出了多维模型、数据转换与加载、物化视图以及模式维护等关键问题上的设计思想和实现方法.     

微波-超声波协同萃取银杏黄酮的工艺研究

以银杏叶为材料,研究了乙醇浓度、微波功率、微波处理时间、料液比、银杏叶粉碎颗粒大小以及微波-超声波协同作用对银杏黄酮提取效率的影响。结果表明微波处理,微波-超声波协同处理可以显著提高银杏黄酮的提取率。确定了最佳的微波处理条件:70%乙醇为萃取液,料液比1∶20,粉末颗粒80目,微波功率50W,微波处理时间4 m in,处理后水浴回流提取2 h所得提取液的黄酮提取率达到81.76%,比直接水浴提取提高了1.3倍,微波-超声波协同处理的黄酮提取率达到83.54%。