平底从动件盘形凸轮机构的研究

对平底从动件盘形凸轮机构进行研究，在已知机构运动简图的前提下，提出了根据已有凸轮的轮廓参数确定从动件运动规律的分析算法，建立了相应的代数算式；并在此基础上，导出了根据预定的从动件运动规律确定凸轮轮廓参数的代数算式。最后，用实例验证了本文算法的正确性。     

一种基于矛盾思想方法的性能指标函数

由给定值阶跃响应过渡过程性能指标中存在的矛盾入手,分析了给定值跟随型控制系统优化的本质,认为其实质上是矛盾对立统一的产物,进而从抓住主要矛盾的观点出发,构造了一种以3个分立的过渡过程曲线特征参数为组成部分的性能指标函数.通过适当的均衡化和归一化变换处理,该性能指标函数在保持主要性能指标平衡性的基础上,加入了最大动态偏差限制、负向波动参数和过渡过程时间参考值,从而在保证稳定性的同时体现了控制要求和实际对象的动态特性,因而具有良好的适应性和针对性.仿真试验结果表明,使用该性能指标函数优化得到的系统具有给定动态偏差范围内快速的阶跃给定值跟随性能,同时具有良好的抗扰动性能和鲁棒性,适合于给定值跟随型控制系统的计算机仿真寻优.     

最小尺寸摆动从动杆移动凸轮机构的一种设计方法

对按许用压力角确定摆动从动杆移动凸轮的最小移动速度了分析,根据压力角表达式,作出该机构 的角速度图,利用图解原理和解析方法,给出了最小尺寸摆动从动杆移动凸轮机构的一种设计方法,     

平底移动从动件凸轮机构CAD

在凸轮机构中平底从动件凸轮机构受力性能最好。本文论述了平底移动从动件盘状凸轮机构的一些参数的选择及凸轮廓线的设计方法和ＣＡＤ过程，可促进平底从动件凸轮机构的设计与应用。     

确定滚子从动件盘形凸轮基圆半径的解析方法

介绍按许用压力角确定滚子从动件盘形凸轮最小基圆半径的一种新的解析方法．同时给出凸轮机构几何参数的可行域．     

直动尖顶从动件盘形凸轮机构效率计算与分析

运用力学方法研究了直动尖顶从动件盘形凸轮机构的瞬时效率，分析了机构的自锁条件，提出了基于效率的设计方法，该方法可作为机构基本尺寸设计理论依据。     

The Forgotten Ones? The Validity of Consideration and Initiating Structure in Leadership Research.

This study provided a meta-analysis of the relationship of the Ohio State leadership behaviors--Consideration and Initiating Structure--with leadership. Overall, 163 independent correlations for Consideration and 159 correlations for Initiating Structure were analyzed. Results revealed that both Consideration (.48) and Initiating Structure (.29) have moderately strong, nonzero relations with leadership outcomes. Consideration was more strongly related to follower satisfaction (leader satisfaction, job satisfaction), motivation, and leader effectiveness, and Initiating Structure was slightly more strongly related to leader job performance and group-organization performance. Validities did vary by leadership measure, but in most cases validities generalized regardless of the measure used. Overall, the results provide important support for the validity of Initiating Structure and Consideration in leadership research. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Continuous Time Universal Filters using Unity Gain Cells

A new circuit configuration for continuous time universal filters using current and voltage followers is proposed. The new configuration employs small number of passive elements. It provides independent control over all filterdesign aspects mainly the natural frequency, ω_o, quality factor, Q, and gain. It also allows complete MOS non-linearity cancellation, thus is suitable MOS-C continuous-time fully integrated filters. Analysis ofthe non-idealities associated with the active elements is included. HSpice simulations that confirm theoretical analysis are included.     

Grounded capacitance multipliers based on active elements

In this study, we present two new grounded capacitance multiplier circuits based on a negative-type second-generation current conveyor (CCII-) and an inverting second-generation current conveyor (ICCII). The first proposed circuit consists of one CCII- and a voltage follower (VF) employing two NMOS transistors while the second proposed circuit is composed of an ICCII and an inverting voltage follower (IVF) including two NMOS transistors. Each circuit contains two resistors, and single grounded capacitor, which is attractive for integrated circuit realization. No active and passive component matching conditions are required for the realization of the proposed capacitance multiplier circuits. The simulation results are included to confirm the theory.     

Realization of Universal Active Complex Filter Using CCIIs and CFCCIIs

In this paper, two universal building blocks for complex filter using CCIIs, CFCCIIs, grounded resistors and grounded capacitors are presented. These can be used to realize various complex bandpass filters with arbitrary order. The paper shows that the response error of the proposed circuit caused by nonideality of active components is more easily compensated than that of the conventional one employing op-amps, and that the sensitivities for all components are relatively small. Experimental results are used for verifying the validity of the proposed circuits.