求解动态系统最优控制的主要数学方法

本文主要阐述了最优控制问题的提法以及如何求解动态系统的最优控制,在众多的求解方法中解析法是一种非常重要的方法,因此本文对这一方法作了深入的探讨。     

Matlab在运动控制系统实验教学中的应用

针对运动控制系统课程的现状,提出了一种基于M atlab的S imu link和Power System工具箱来设计运动控制系统实验,并给出了仿真实例。实践证明,利用电力系统工具箱作仿真,学生能较快地理解课程理论,学会仿真分析复杂的控制系统问题的技能。     

基于Project Tango手机的室内导航路网生成方法

导航路网是实现室内定位与导航服务的关键。现有室内路网生成方法成本较高,且依赖于室内建筑CAD图纸或室内二维平面图等先验知识,数据获取过程繁琐。提出一种服务于室内导航与定位的基础路网模型,利用Project Tango设备采集路网模型所需原始数据,经过细粒度划分得到室内空间适应性导航路网。实验证明,该方法可在面向未知环境时,可更快速、高效地获取较高精度的室内导航路网,且成本更低。     

从增长轨迹看我国高等教育的全面协调发展

研究高等教育的全面协调发展,首先要厘清发展的内涵和发展观的历史演变。讨论我国高等教育的发展是否全面协调,需要对50多年来高等教育的增长轨迹进行描述,以此做出评价。从其轨迹来看,我国高等教育的发展有时比较全面、比较协调,有时则是不全面、不协调的。要真正做到高等教育的全面协调发展,必须坚持决策的科学化、民主化,坚持质量第一原则和保证必要的投入。     

刚体平面平行运动的转动方程

通过对选动点为基点为时转动方程建立的讨论，给出了选非质心动点所建立的转动方程与刚体定轴转动方程一致的条件，并以瞬心为例，说明了在特殊条件下选瞬心为基点较选质心为基点更易于求解刚体的平面平行运动。     

基于交流伺服系统的数控课程设计

介绍了使用新型数控实验装置—NC嵌入PC式交流伺服数控系统完成的专业课程设计实例,该实验装置的控制手段和控制策略先进。课程设计内容软、硬件兼顾,系统性好。通过这一集中性实践环节的训练,提高了学生的设计和分析问题的能力。     

谈数学教学法中的哲学观点与方法

阐述了在数学教育中要善于用哲学的观点和方法组织教学 ,教会学生用运动观点理解数学知识 ,使学生树立起辩证的思维方式和正确解决问题的方法 .     

The association between lower limb biomechanics and ball release speed in cricket fast bowlers: a comparison of high-performance and amateur competitors

The aim of this study was to compare the associations between lower limb biomechanics and ball release speed in 15 high-performance (HP) and 15 amateur fast bowlers. Kinematic and kinetic variables of the lower limbs collected in the laboratory environment with a 3D Vicon motion analysis system were compared between groups, as well as their associations with ball release speed. HP bowlers had a significantly higher run-up velocity at back foot impact but this difference became non-significant at ball release. Front knee kinematics were not statistically different, however effect sizes revealed medium-large differences with the HP group displaying a more extended knee joint at maximum flexion (d = 0.72) and ball release (d = 0.76). Only front hip positive power was significantly higher in the HP group and it was suggested that the probable cause was the HP bowlers having less knee flexion after front foot impact. From a joint power analysis, the extensor muscle groups of the hip and knee were shown to be important in developing ball release speed. This highlights the need for lower limb/core strength programmes to be multifaceted and focus on the muscles associated with both power and stability.     

等离子显示中运动伪像的准确估计

针对目前等离子显示屏普遍存在的运动伪像问题,提出了一种新颖的模拟计算方法,该方法实现了对等离子体显示屏运动伪像的准确、快速估计.该方法通过测量等离子显示屏不同颜色不同灰度下光信号随时间的变化情况,仿真人眼对运动图像的视觉感知行为,模拟计算出任意图像以一定速度运动下的视觉感知效果.新算法不但加入了等离子显示屏荧光粉的延迟效应的影响,而且提高了模拟计算速度.所得模拟结果与实际主观视觉感知实验相符.这种快速准确的估计使对等离子显示器件运动伪像的客观评价成为可能.     

一种将增强层运动补偿与混合时空域的FGS融合的视频编码方案

1 Introduction Scalable coding has already been recognized as aneffective solution to resolve the network’s bandwidthvarying[1].It is also i mportant for video transmissionin error-prone environments , congest-prone networkand network with varying quality of service ,such aswireless video transmission systems .So it plays a veryi mportant role in both network communication andwireless communication. MPEG-4 video standard supports fine granularityscalability ( FGS) fine granularity scalabil…