SAW动态转矩传感器理论计算与推导

动态转矩的测量对于机械传动过程的监测和控制具有重要意义,现有的测量方式大都是有源接触式的测量,多具有接触滑片磨损和测量精度下降等问题。本实验采用声表面波(SAW)技术的动态转矩测量方法。通过分析其工作原理,以典型ST切片石英基体材料为例,推导SAW器件谐振频率与转矩的关系表达式,提出采用差分连接方式来消除温度对于测量结果的影响,并简要分析测量系统的构成与工作原理。     

Marketing students at work: organisation citizenship behaviour training as a tool to minimise survey non-response

A continuing decline in an institution’s response rates for student evaluations of teaching (SET) raised faculty concerns about non-response bias in summary statistics. In response, this institution’s SET stakeholders partnered with a Marketing Methods class section to create strategies for increasing response rates. The project was also an exercise in organisational citizenship behaviour (OCB) training because students in that class section received intensive training on how SET feedback is valued by instructors and its role in improving their academic organisation. Within the context of OCB theory, this article finds student exposure to OCB training increases SET response rates because knowing how SET benefits their organisation increases unit-level response propensity for member surveys intended to improve their institution. In the year of the OCB training, SET response rates increased by 26%, though the increases did not persist into later academic years. The response rate increases are realised across all demographic groups with disproportionate increases among low response rate groups, including low performing students, men and ethnic minorities.     

基于HTN动态教学规划系统的研究

采用人工智能领域的层次任务网络(HTN)规划方法及相关的简单层次序列规划器2(SHOP2)构建一个动态教学规划系统(DTPS)。介绍了动态教学规划系统所必须要实现的功能,HTN规划及SHOP2的相关知识,及DTPS的系统特点。并介绍了如何设计一个用于描述教学活动的HTN规划的领域表示,以及DTPS系统的整体架构。最后用DTPS实现的规划实例,进一步阐述该技术在教学规划领域内的应用前景。     

Ensuring quality in EPs’ use of dynamic assessment: a Delphi study

Dynamic Assessment (DA) is an interactive form of cognitive assessment used by some educational psychologists (EPs) to assess the learning potential of children and young people, through a focus on cognitive and affective aspects of learning. In terms of UK EP practice, this approach has the potential to complement the focus on ‘person-centred planning’ set out in the Special Educational Needs and Disability Code of Practice. However, there is little guidance or consensus on what constitutes good DA practice. This research employed a Delphi methodology to identify competencies required to carry out quality DA. A panel of five international experts in DA and 17 EPs, using DA in practice, participated in three rounds of a Delphi study that identified 13 knowledge and 12 skills competencies considered essential for quality DA practice. The resulting framework could inform training and professional development programmes for EPs wishing to develop their skills and competence in practice.     

埋设管线穿过不同介质时的地震反应研究

本文应用表面波理论计算埋设管线穿过不均匀场地时的地震反应。用带竖直断面的分层介质模拟不均匀场地。从断面两侧的变形、应力连续条件近似确定两侧由表面波引起的场地运动,将所得的场地运动输入到以弹性地基梁模拟的管线上,得出管线的地震反应。最后通过计算实例对结果进行了比较分析。     

Finite element analysis of dynamic stability of skeletal structures under periodic loading

INTRODUCTION Some structures fail geometrically before thestrength failure because of lack of stability and such afailure is known as instability failure or bucklingfailure. Determination of buckling load is importantin order to ensure the stability of a structure. If thestructure under consideration is subjected to a dy-namic load then this problem comes under the pur-view of dynamic stability problems. Examples areslender offshore structures subjected to periodic ex-citations and colum…     

线性系统脉冲响应的初值修复

用拉氏变换寻求线性系统在单位脉冲激励下产生的响应，会出现初值异变，针对这一情况．运用摄动法对初值异变进行了成功的修复，并将修复结果推广到更一般的阶微分方程。     

SC response characteristics of two kinds of coagulant

Automatic coagulant dosage control with streaming current (SC) technique is introduced in this paper. Aluminum and ferric coagulants are widely used in surface water treatment. The SC response characteristics of P-AlCl3 aluminum coagulant and P-FeCl3 ferric coagulant were investigated in this work. Bench-scale water treatment results were obtained from jar tests including rapid mixing, flocculation and undisturbed sedimentation. Results showed that aluminum coagulant is more sensitive than ferric coagulant to SC response.     

Children’s solving of ‘Tower of Hanoi’ tasks: dynamic testing with the help of a robot

Abstract

The present study investigated the usefulness of a pre-programmed, teleoperated, socially assistive peer robot in dynamic testing of complex problem solving utilising the Tower of Hanoi. The robot, in a ‘Wizard of Oz’ setting, provided instructions and prompts during dynamic testing to children when they had to solve 3?D Tower of Hanoi puzzles. Participants were 37?second grade 8-year-old children, of whom half received graduated prompts training between pre-test and post-test, delivered by the robot, and half did not. It was found that children’s progression in task accuracy varied considerably, depending on whether or not children were trained in solving Tower puzzles. Trained children showed greater progression in the number of Tower problems that they could solve accurately, made considerably fewer steps, although the Tower puzzles increased quickly in difficulty level. The mean completion time of trained children decreased at a slower rate than that of the untrained children, but both groups of children took considerably more time to think and plan ahead before they started the solving process. Only moderate relations with planning behaviour were found. In general, the study revealed that computerised dynamic testing with a robot as assistant has much potential in unveiling children’s potential for learning and their ways of tackling complex problems. The advantages and challenges of using a robot in educational assessment were discussed.     

浅析动态薪酬管理机制的构建与运行

该文以常见薪酬激励机制的误区为切入点,从岗位分析的角度系统地分析了如何设计一套有效的动态薪酬管理机制,围绕如何配合企业战略这个薪酬管理宏观层面的目标具体分析了动态薪酬管理机制的运行过程.