基于支撑向量机在线学习方法的短期负荷预测

提出了基于支撑向量机在线学习方法的短期负荷预测,该方法克服了传统的支撑向量机负荷预测当训练样本集合改变时为了保证预测精度必需重新进行训练来得到新的回归函数的缺点.充分利用支撑向量机解的稀疏性和前一次的训练结果,提出了递增和递减算法,直接修改原有回归函数的系数来得到新回归函数.实例计算表明,该方法与传统支撑向量机方法相比,具有计算速度快,推广能力强的显著特点,在相同预测精度下,计算速度提高了近两个数量级.     

基于单片机的图像传输自动跟踪系统

应用89C51单片机设计了一种简单实用的控制电路，可以自动或手动控制定向通信天线进行360度旋转，跟踪发射机，实现高质量图像和语音信号传输．对其硬件电路组成和软件设计等方面也作了介绍．     

无穷直线上的双解析函数的Riemann边值问题

研究双解析函数在无穷直线上的Riemann边值问题，并给出了该问题的可解性定理。     

单片机89C52在多功能电度表中的应用研究

讨了一种以89C52单片机为核心构成的多功能电度表，它可以同时具有电能表、自动补偿、分时段测电能等多种功能，并以先进的LCD显示屏显示当前的功率因数、总电能值、所消耗的峰、谷、平电能值。     

EPON上行方向物理编码子层的FPGA实现

目前EPON的物理层(其中包含物理编码子层)在上行方向尚无ASIC芯片可以直接使用，该文提出了EPON物理编码子层在上行方向的设计思想，并用FPGA实现，功能仿真的结果验证了该设计逻辑功能的正确性。     

一种还原糖自动检测系统

根据生化反应的基本原理,利用MCS-51单片机开发设计了一种还原糖自动检测系统.介绍了该系统的硬件和软件设计模式,其特点是结构简单、操作方便,是还原糖检测的一种新方法.     

Real time observation of the photocleavage of single DNA molecules

A method for real time observation of photo-cleavage of stratched λDNA at single molecular level by a fluorescent microscope coupled with CCD is developed.DNA molecules stained with YOYO-1 are stretched by the mo-lecular combing technique and fixed on a modified slide.Then the Process of Photocleavage and relaxation of DNA under radiation of blue light is observed.We speculate that the conformation change of stretched DNA and the effect of water are likely to facilitate the effect of YOYO photocleav-age DNA molecules.The photocleavage effect of YOYO for stretched DNA may be useful to study DNA elasticity,cancer research as well as the interaction between DNA and dyes.     

Parallel Mechanisms with Two or Three Degrees of Freedom

Parallel manipulators for the machine tool industry have been studied extensively for various industrial applications. However, limited useful workspace areas, the poor mobility, and design difficulties of more complex parallel manipulators have led to more interest in parallel manipulators with less than six degrees of freedom (DoFs). Several parallel mechanisms with various numbers and types of degrees of freedom are described in this paper, which can be used in parallel kinematics machines, motion simulators, and industrial robots.     

Abnormal piezoresponse behavior of Pb（Mg1／3Nb2／3）O3-30% PbTiO3 single crystal studied by high vacuum scanning force microscopy

The piezoresponse behavior dependence of the Pb(Mg1/3Nb2/3)O3-30%PbTi03 single crystal on the vacuum degree has been investigated by scanning force microscopy in the piezoresponse mode under high vacuum. Unusual piezoresponse behavior related to the screening charges compensation mechanism is observed on the (111) crystal face. The significant piezoresponse degradation behavior with low piezoresponse signal under high vacuum is attributed to the instability of the polarization state due to the insufficient compensation of the intrinsic screening charges for the polarization charges in PMN-30%PT single crystal. In contrast, the remarkable domain contrast of the sample at ambient pressure is owing to the dominant surface screening charges deriving from surface adsorption, which plays an important role in determining the stability of the domain behavior and in achieving the optimal properties.     

基于力信息的机器人接触状态下作业的技能学习

为实现机器人接触状态下作业的演示编程，使机器人获得人的基于力信息的作业技能，首先提出了描述接触状态的元素接触形式，用元素接触形式序列建立技能模型，根据不同的接触形式具有的不同腕力分布，利用支持向量机(SVM)对不同的元素接触形式进行辨识，在此基础上机器人获得人在接触状态下的作业技能，实现了演示编程方法中最关键的一步。