Synchronized lower limb kinematics with pelvis orientation achieves the non-rotational shot

A non-rotational (NR) shot is now a well-known scoring move in soccer. To execute the NR shot, it is necessary to deprive the ball of any rotational forces during the impact phase. To execute the NR shot, it is natural that the force vector acting from the foot would pass through the ball’s center of gravity; however, the coordinated motion of the lower limb joint’s angular displacement and the pelvis is still unclear. The aim of this study is to estimate the coordinated leg and pelvis motion during the NR shot as compared to that during instep kicking. Four right-leg dominant college league players were asked to perform a NR shot and an instep kick a total of 10 times each. Hip, knee, and ankle joint angular displacements in the sagittal plane and pelvis yaw and roll rotational motions during both types of kicks were calculated with 14 IR reflective markers using a 3D real-time motion analysis system with a 250-Hz sampling. The Euclidean distances of the joint space of the NR shot and the instep kick were also calculated to detect similarities in the coordinated motion of the lower limb. The results showed that the lower limb joint motions in the sagittal plane were not different; however, the pelvis roll and yaw motions were apparently different, and these phenomena could simulate a pendulum motion with changes in both the vertical and horizontal displacements. These results suggest that the coordinated motion of the lower limb joint’s angular displacement shows high similarity between the NR shot and the instep kick, and the pelvis roll and yaw synchronized orientation is essential for achieving the NR shot.     

如何建立城镇国土基础地理信息系统

阐述了城镇国土基础地理信息系统的设计内容、总体设计的基本原则、功能、分类与编码以及系统运行的环境和特点，对合理规划、开发和利用国土资源，促进国民经济的可持续发展，改善全球环境有着十分重要的意义。     

基于有限元计算的螺栓接头预紧力和允许外力设计方法

用MSC.Marc软件建立螺栓接头的三维接触有限元模型,计算得到了螺栓接头中螺纹段最大等效应力随预紧力的变化曲线、残余预紧力和螺纹段最大等效应力随被连接件所受轴向外力的非线性变化曲线,提出了基于这些曲线设计高强度螺栓接头预紧力和允许外力的方法。     

《文件自迩集注释》的注音和释义系统分析

《文件自迩集注释》是威妥玛主编的优秀汉语第二语言公文教材。该教材的注释系统主要分为两个部分:注音系统和释义系统。该教材注音系统有23个声母、41个韵母,记音准确,但不太关注声调;释义详略有别,难度大的词语往往从结构、语义、功能、搭配或文化等方面释义。两个部分都紧扣学生母语和汉语的相同点和不同点,突出汉英对比,体现了教材的本土化特征。     

Improved fast intra prediction algorithm of H.264/AVC

With advanced prediction modes of intra prediction, intra coding of H.264/AVC offers significant coding gains compared with previous video coding standards. It uses an important tool called Lagrangian rate-distortion optimization (RDO) technique to decide the best coding mode for a block, but the computational burden is extremely high. In this paper, we proposed an improved fast intra prediction algorithm including block type selection and mode decision algorithm based on analysis of edge feature of a block. Our algorithm filters out unlikely block type and candidate modes to reduce the RDO calculations. Experimental results showed that the proposed algorithm can reduce the computation complexity of intra prediction from 52.90% to 56.31%, with 0.04 dB PSNR degradation and 2% increase of bit rate.     

戚学标年谱

戚学标,浙江太平人(今温岭),乾隆四十六年进士,自乾隆五十九年,至嘉庆十一年,这十三年间,任涉县知县。道光元年至道光三年,授宁波教授。多次在孔继涵家开馆,执教过鹤鸣书院、紫阳书院、崇文书院等。主要交往人物有洪枰、黄河清、宋世荦、孔继涵、徐秉文、赵希璜、崔述等。     

学分制条件下实施本科生导师制的思考

本科生导师制是学分制管理的一个重要组成部分。本文从培养高素质复合型人才的需要出发。阐明了本科生导师制在学分制管理制度下的重要性，导师制存在的问题，以及对如何推行和完善本科生导师制所提出的对策。     

Triadic interaction in clinical task-based interviews with mathematics teachers

A clinical task-based interview can be seen as a situation where the interviewer–interviewee interaction on a task is regulated by a system of explicit and implicit norms, values, and rules. This paper describes how documenting and mapping triadic interaction among the interviewer, the interviewee, and the knowledge negotiated can be used to increase procedural replicability of the interview and accuracy of drawn conclusions about the interviewee’s thinking process. Excerpts from interviews with 25 inservice mathematics teachers working on a task to make up a problem whose solution requires division of two fractions are discussed. The excerpts illustrate the relationship between methodological decisions taken by the interviewer during the interview and the applicability of the interview output to the research questions. A divergent analysis of the interviews with these teachers, which spanned over two years and were conducted by four interviewers, is used to offer a framework for analyzing data collected in clinical task-based interviews.     

从严治学提高培训质量

工商管理培训注重实用性，强调培训内容与实际需要相结合，注重学以致用。在制定培训计划方面我们做了有益的探索：一是培训计划较好地体现了国家经贸委下达的“教学大纲”和“教学方案”的基本内容和要求，开设了《管理经济学》等13门课程，确保360学时。在完成教学计划的基础上又增加了我国加入WTO带来的机遇与挑战、企业投融资决策的管理创新与风险控制策略、法人治理结构、领导艺     

Flow shop rescheduling problem under rush orders

INTRODUCTION Rescheduling problem in manufacturing system is considered as a particularly hard combinatorial optimization problem,closely related with uncer-tainty caused by exterior business environment and interior production conditions.Production resched-uling is a common practice in manufacturing compa-nies all over the world.Four sources of production disturbances have been identified:(1)incorrect work;(2)machine breakdowns;(3)rework due to quality problem;and(4)rush orders(Rangsarit…