机电系统交流采样的误差分析

机电系统在对周期电气信号的采样测量中 ,电网频率的变化、信号周期的不同步均会导致测量误差 ,典型算法梯形法中也存在截断误差。作者对目前电量采样中常出现的采样误差进行了分析 ,其结果对机电测量系统的软、硬件设计具有指导参考价值     

串行通讯中的波特率设置和误差分析

波特率设置的误差是串行通讯中一个非常重要的参数。本文作者首先介绍了MCS 51单片机串行通讯中波特率的设置方法,然后分析了波特率的误差来源,并着重介绍了几种波特率误差的消除方法。     

利用辛算法求解谐振子薛定谔方程误差分析

通过谐振子实例揭示了利用辛算法求解薛定谔方程所得波函数的相对误差变化的规律性 .通过计算发现任一时刻波函数在各个x格点处的相对误差完全相同 .波函数实数部分和虚数部分的相对误差随着时间的推演均周期性地在正数和负数之间来回变动 ,其周期为 62 8步或说是πs .波函数的实数部分和虚数部分的相对误差之间有类似于不确定关系的特点 .一个相对误差趋向于无穷小时另一个相对误差趋向于无穷大 .两者的乘积为一稳定的小数 .随着时间的推进这一小数的绝对值缓慢增大     

ISA法铜电解槽槽面水平误差的控制

本文介绍了通过采用找平装置来控制ISA法铜电解槽槽面水平误差的方法,通过现场测量及工艺操作证明是行之有效的。     

Escapable Conclusions: Toomela (2003) and the Universality of Trait Structure.

A. Toomela (2003) concluded that personality structure may be shaped by a cultural mechanism, word meaning structure, and that the apparent universality of the Five-Factor Model (FFM) was the result of inadequate sampling of concrete thinkers. A reanalysis using targeted rotation showed that the intended structure was generally replicated; small deviations in the most concrete thinkers were probably due to measurement error. The reanalysis authors found no evidence of structural differences in a second sample of adults classified as concrete or abstract thinkers. The FFM structure has been replicated in many samples containing individuals with cognitive or educational limitations; observer ratings may be preferred if these limitations are severe. To date, there is no compelling evidence that culture affects personality structure. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

A pulsed neural network model of spectro-temporal receptive fields and population coding in auditory cortex

The existence of spectro-temporal receptive fields and evidence for population coding in auditory cortex motivate the development of such models, that explicitly operate in the time-frequency domain and are based on a pulsed neural network. In presenting such a model, a formal connection of the fields of Time Frequency Analysis and Pulsed Neural Networks is established. The resulting neural time-frequency signal representation is shown to be representable as a signal-dependent overcomplete dictionary. It is derived from neural population coding. Signal decomposition and filtering effects are presented, indicating obvious technical applications of the proposed model. This revised version was published online in June 2006 with corrections to the Cover Date.     

相空间重构中的K-L变换

在对单变量输出时间序列用延迟坐标状态空间法进行相空间重构基础上 ,提出对重构后的相空间再作K L变换的改进方法 .采用这种方法后 ,在保留原信号绝大部分能量的前提下 ,能够完全去除重构相空间中各个向量之间的相关性 ,更好地恢复原动力系统的特征 ,更多地体现出原信号所携带的信息 ,同时该方法还可以减少重构相空间的计算量 .     

使用夹具加工工件时定位误差分析与计算探讨

本文概述了定位误差产生的原因，综合分析了各种定位误差计算方法的优缺点，提出了用“调整法”在斜面上钻孔时，特定的工序尺寸标注情况下，计算定位误差出现的新问题，从而导出了定位误差更为广泛的概念。     

一类有理三次样条的区域控制和逼近性质

对一类分母为二次的有理三次插值样条曲线的区域控制问题进行了研究 ,给出了将其约束于给定区域的充分条件及充分必要条件 ,然后给出了当被插值函数为一阶连续时插值函数的逼近性质 .     

工业机器人校正技术及软件设计

机器人末端执行器准确到达预先指定位姿的能力是其重要的技术指标之一,而机器人位姿误差校正补偿技术正是提高机器人位姿精度的有效方法.本文采用机器人位姿误差局部校正方法,建立了机器人工作空间位姿转换矩阵及误差模型.以AdeptOne机器人为对象,利用光电检测手段,自行设计研