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.     

学习型社会视野中高职教育的发展与创新

学习型社会对高职教育提出了许多新要求,而高职教育也在积极探索适应这种需求的新模式,通过职业培训与学历教育、成人教育与职业教育、社区教育与学校教育等多种教育措施的综合运用,拓宽了高职教育的生存与发展空间.     

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.     

The effect of Co doping on the magnetic entropy changes in Ni44−xCoxMn45Sn11 alloys

A series of Ni_44?xCo_xMn₄₅Sn₁₁ (x = 0, 1, and 2) ferromagnetic shape memory alloys (FSMAs) were prepared by arc melting method. The martensitic transition (MT) and Curie temperatures vary obviously with Co addition. With the increasing temperature, the magnetization increases from a weak-magnetic martensite to a ferromagnetic austenite, for x = 0 and 1. But in the case of x = 2, the magnetization increases from a ferromagnetic martensite to another ferromagnetic austenite. Under an applied magnetic field of 10 kOe, the peak values of magnetic entropy changes are 10.1, 14.1, and 6.2 J/(kg K), for x = 0, 1, and 2, respectively. The magnetic phase transition near the martensitic transition temperatures and the field-induced metamagnetism should account for the large magnetic entropy changes.     

均匀阵列下二维TLS-ESPRIT改进算法的研究

通过对均匀阵列下二维TLS-ESPRIT算法的研究,将一维ESPRIT改进算法推广到二维领域,在二排平面均匀直线阵模型中使用同一排几何阵列构造两个子阵列,即将阵元为M的阵列够造成由前M-1个阵元构成的子阵列和后M-1个阵元构成的子阵列,从而增加了阵列的有效孔径,提高了信源波达方向的估计精度,并通过MATLAB仿真,给出了不同信噪比情况下,改进算法与原算法的性能比较,证实了该算法的有效性。     

长短桩复合地基加固处理高层建筑下鱼塘回填土地基

鱼塘回填土的形成既有自然沉积过程又有人工堆填过程。论文从工程角度分析了鱼塘回填土在成因、分布及强度等方面的特点,以某高层建筑基础下鱼塘回填土的地基加固工程为例,介绍了长短桩复合地基在加固处理鱼塘回填土中的应用,对类似工程具有参考作用。