浅谈高职学校的素质教育

关于素质教育,我国党和政府给予了高度重视,多次强调要提高全民族的综合素质,其关键在于素质教育。素质教育包括品德素质、文体素质、身体素质等方面。     

An Intelligent Adaptive Fuzzy PID Controller Based on Multimodel Control Approach

A novel intelligent adaptive fuzzy PHD controller based on multimodel control approach is presented in this paper.It can improve the system performance of the dynamic time- varying system at various operating conditions.The fuzzy PHD controller is implemented by combining a fuzzy PI with a fuzzy PD controller in a parallel structure. The parameters of the fuzzy PHD controller are linked, via analytical derivation, to the gains of the linear PID controller. The sum of error square is used as performance criterion to locate the model that best reresents the process among the multiple models, The desired control output to drive the process along the desired path is generated only by modifying the output scale factots GU_I and GU_D of the fuzzy PID controller, Among the prescribed models, the control signal of the nearestmmodel to the system is applied. The system can be driven to its original trajectory because of the robustness of the fuzzy PID controller, Computer simulation results show that the adaptiv     

Study on Three-layered Grid Conceptual Prototype Using Ecological Network Computing Environment

Next generation grid systems where the emphasis shifts to distributed global collaboration, a service-oriented approach and information layer issues exhibit a strong sense of automation. Requirements for these systems resemble the self-organizing and the healing properties of natural ecosystems. Some key ecological concepts and mechanisms are introduced into the design for the third generation grid computing architectures by inspiration of this resemblance. Also, an Ecological Network-based Computing Environment (ENCE) platform is designed in this paper. Based on the ENCE platform, a grid-computing model of three-layered grid conceptual prototype that embeds the ENCE layers is presented from the viewpoint of implementation. The implementation model should be useful to the design of the third generation grid systems.     

基于神经网络的股票估值综合模型

鉴于传统估值方法对我国股市不完全适用，结合经济类和工程类研究者对股票估价的一般方法，提出了一种基于神经网络的股票估值综合模型．模型以上市公司的财务数据、比率因素及历史股价作为输入变量，将市场均价作为输出值．通过实证分析，显示模型具有良好的估价性能，并且优于市赢率估价法，     

Analytical Structures of Typical Takagi - Sugeno Fuzzy PID Gain Scheduling Controllers

The analytical structure of a class of typical Takagi Sugeno (TS) fuzzy controllers is revealed in this paper.The TS fuzzy controllers consist of three or more trapezoidal input fuzzy sets, Zadeh fuzzy logic AND operator,fuzzy rules with linear consequent, and the centriod defuzzifier. The TS fuzzy controllers are proved to be accurately nonlinear PID controllers with gains continuously changing with process output. The analytical expressions of the variable gains of the TS fuzzy controllers are derived and their mathematical characteristics including the bounds and geometrical shape of the gain variation are analyzed. The resulting explicit structures show that the TS fuzzy controllers are inherently nonlinear PID gain scheduling controllers with variable gains in different regions of input space.     

基于双声光移频器的外差式激光多普勒测振计

分析了单声光移频器构成的外差式激光多普勒测振计中声光移频器驱动信号的频率稳定性和信号功率对待测振动信号的影响.为了降低声光移频器驱动信号频率漂移的影响,提出双声光移频器构成的外差式激光多普勒测振计,并基于直接数字频率合成技术,以相位噪音低、初始相位可控的芯片AD9912为核心器件,完成了声光移频器驱动信号生成及处理模块的设计.开展了双声光移频器组成的外差式激光多普勒测振计的振动测量实验,结果表明,驱动信号生成装置可以驱动声光移频器正常工作,且测振计的本底噪音在0～10kHz频带范围内呈现平坦分布,0～1kHz频段内噪音得到明显抑制,较单声光移频器构成的外差式激光多普勒测振计有显著改善.     

汽油机分层废气再循环与稀薄混合气燃烧

为探索汽油机清洁燃烧技术途径 ,设计了 5气门汽油机馅饼状分层充气系统 ,试验对比了在分层充气前提下的稀燃和废气再循环对发动机排放特性的影响 ,并研究了两者叠加后对发动机性能的影响。试验结果表明 ,采用分层充气方式能够使废气再循环率达到 3 2 % ;在相同进气充量时 ,废气再循环与稀燃对改善 NOx 排放的效果基本相同 ;稀燃与废气再循环相结合可以获得比单纯稀燃或单纯废气再循环更好的综合性能 ,使 NOx 和 CO排放均降低到化学计量比无废气再循环情况下的排放指标的 10 %以下。稀燃与分层充气废气再循环相结合 ,简便可行 ,为研发低污染发动机提供了新思路     

一种采用单照相机的三维人体测量方法

非接触式三维人体自动测量是现代化人体测量技术的主要特征,也是今后人体测量的趋势所在.在分析国内外非接触式三维人体测量方法的基础上,提出一种采用单照相机的三维人体测量方法.首先通过在单照相机前加一套镜面组合系统,进行实时拍照,获得一张同时记录人体的正面和侧面的照片;然后通过基于图像的人体特征区域和特征参数提取得到人体尺寸信息(尺寸、轮廓点和轮廓线).试验结果验证了此方法的可行性.     

Analytical Analysis on the Structure of a Typical Fuzzy On - Off Controller

The analytical structure of a typical fuzzy on - off controller that employs three or more triangular Input fuzzy sets, Zadeh fuzzy logic AND operator, fuzzy rules with singleton output fuzzy sets, and the centriod defuzzifier is Investigated in this paper. The analytical expressions of the variable gains of the fuzzy controller are derived. The resulting explicit structure shows that the fuzzy controller is accurately a nonlinear PD - like controller with gains continuously changing with system output in different regions of input space.     

基于双声光移频器的外差式激光多普勒测振计

分析了单声光移频器构成的外差式激光多普勒测振计中声光移频器驱动信号的频率稳定性和信号功率对待测振动信号的影响.为了降低声光移频器驱动信号频率漂移的影响,提出双声光移频器构成的外差式激光多普勒测振计,并基于直接数字频率合成技术,以相位噪音低、初始相位可控的芯片AD9912为核心器件,完成了声光移频器驱动信号生成及处理模块的设计.开展了双声光移频器组成的外差式激光多普勒测振计的振动测量实验,结果表明,驱动信号生成装置可以驱动声光移频器正常工作,且测振计的本底噪音在0~10kHz频带范围内呈现平坦分布,0~1kHz频段内噪音得到明显抑制,较单声光移频器构成的外差式激光多普勒测振计有显著改善.