Design and Comparison Base Analysis of Adaptive Estimator for Completely Unknown Linear Systems in the Presence of OE Noise and Constant Input Time Delay

In this paper, an adaptive estimator (AE) is introduced to learn the approximate Q‐function and control policy by only using the noisy states and control signals of the unknown linear, discrete time systems having constant input time delay. The system measurements are uncertain owing to output error (OE)‐type noise acting randomly on the system measurements. Therefore, this research differs from the designed AE in the literature since previous research ignores the role of the external random disturbances on AE‐based learning. In order to compare the AE‐based learning results with traditional system identification (SI) approaches, a modified version of the OE model structure for unstable systems is reviewed and parameters of a second‐order unstable system with constant input time delay are identified. The simulation results demonstrate that the designed AE efficiently minimizes the stochastic cost function and the temporal difference error by learning the approximate solution for the Hamilton‐Jacobi‐Bellman (HJB) equation. It is noted that the error in the Q‐function obtained with the AE is slightly larger than the Q‐function attained with the identified OE parameters. However, as the noise standard deviation increases, the error in the AE‐based learning results reduces whereas the error in the OE‐based learning increases. This indicates that even though the added random noise deteriorates the performance of the OE predictor, it improves the learning efficiency of the AE since it acts like exploration noise.     

P215／70SR15高性能轮胎设计

根据上海通用ＢＵＩＣＫ轿车对原配轮胎的特殊要求,采用先进的有限元分析,噪音仿真优化,刻花工艺和独到的配方设计等创新技术研试Ｐ２１５／７０ＳＲ１５ Ｒ４２Ａ高性能轮胎。产品具有操纵性能好,乘坐舒适,驾驶平稳,耐磨性好等特点。花纹设计新颖,噪音低,在干／湿路面牵引性能强、滚动阻力低。     

用VB实现班主任工作的电子化

寄发通知是现在很多部门特别是学校班主任工作中例行的公务，传统的平邮方式工作量大又容易差错，为了减轻班主任工作量，减少人工操作中出现的差错，介绍了如何利用Visual Basic语言，读取数据库中的数据，自动生成电子邮件正文，并通过Microsoft MAPI Controls 6．0控件，利用Outlook Express，实现通知单以E-mail的形式自动寄发，从而实现办公自动化。     

基于正交试验的间歇传动链动力学仿真研究

以间歇传动链为研究对象,建立了该系统的虚拟样机。运用正交法设计试验,选择输入轴转速、导轨材料阻尼系数、链条和导轨之间的库仑动摩擦系数、预紧弹簧刚度和集中质量共5个因素作为试验参数,以链条附件加速度值作为振动指标,进行了间歇传动链的动力学仿真研究。     

低捻转杯纱及毛巾产品的试制与开发

介绍了在中频转杯纺纱机上纺制低捻转杯纱及在有梭织机上织造低捻转杯纱纯棉毛巾和染整的工艺流程,取得了一系列生产实践参数。为开发、生产低捻转杯纱提供了范例及生产依据。     

Optimization of Open-end Rotor Spinning Frame Parameter and Estimation of Relevant Quality Characteristics

The high-cleaning Lyocell fibers are used to spin the Ne 32 yarns for an open-end rotor spinning frame. The optimal processing parameters were obtained in demonstrating output speed, stretching roller speed, feed speed and rotor revolution. The quality characteristics, such as yarn count, strength, elongation and Um (%), are far beyond the rating standard of the combed yarn. No yarn breaking for continuous spinning during the experimental confirmation. The result presents lower yarn breaking rate and maintains stabilized output status of spinning conditions. The back propagation neural network was employed for learning, forecast and verification of the processing parameters.     

光电MCM分割算法的改进

芯片级分割技术可用于解决光电MCM(OE MCM)物理设计所面临的散热、系统速度及最大光互连距离等问题.本文给出了光电MCM分割的模型,将经改进的遗传算法(Gas)用于光电MCM的分割问题中.改进算法较标准遗传算法更适合光电MCM分割,其应用可使系统功耗降低约50%.     

混凝沉淀—IC工艺预处理高浓度OE生产废水

脂肪酸聚氧乙烯酯(OE)生产过程中产生高浓度有机废水,用混凝沉淀—IC反应器预处理高浓度OE生产废水,当进水CODCr为6 000～9 000 mg/L、SS为800～1 500 mg/L时,出水平均CODCr、SS分别为780 mg/L、200 mg/L,CODCr、SS的平均去除率达到90%和85%,出水水质达到厂方的预处理要求,为后续主体工艺处理提供保障。     

配套轿车轮胎的性能测试

介绍配套轿车轮胎开发过程中,从轮胎单体性能到轮胎整车性能所需的测试项目、设备及方法等。耐久性能包括常规耐久性能、老化耐久性能、结构耐久性能和整车加速耐久性能,安全性能包括强度性能、脱圈阻力、实车脱圈阻力、保持性能、制动性能、横向抓着性能、高速稳定性和耐鼓包性能,动力学性能包括刚度特性、六分力、操纵稳定性以及噪声、振动和声振粗糙度,经济性包括滚动阻力性能和耐磨性能等。指出建立完备的测试系统是配套轮胎开发的基础。     

OEMCM中光互连布局算法的研究

本文着重于具有FSOI结构的OEMCM的光学互连及其布局算法研究.针对具有CGH的FSOI系统中的互连布局特点,提出一种有效互连布局算法.运用该算法对典型的大规模互连网络示例进行的运算结果表明,该算法不仅能够有效地解决这种FSOI系统中的网络互连具有一定空间局限性的问题,而且与已有的其它互连布局算法的计算机模拟结果相比,本文的算法在布局结果、算法的收敛性等方面具有明显的优点.