基于单片机控制的智能机器人系统设计     

程玉凯  陆倩 《宁波职业技术学院学报》2011,(5):1-4

研究了如何将单片机控制技术应用于智能机器人的显示模块、听觉模块等重要部件上,旨在提高机器人工作的可靠性和智能性。  相似文献   

PETS一3口语测试评分方法对信度的影响     

陈妍玲  肖惜 《金华职业技术学院学报》2011,11(4):36-38

全国公共英语等级考试包括笔试和口试两大部分,分为五级。PETS-3口语测试评分方法既有优点,也存在不足之处。该口试评分方法对测试的信度产生了一定影响。评分的信度取决于评分标准、评分依据以及评分人三方面的共同作用．最终确保评分信度的真实、可靠。  相似文献   

Peer assessment accounting for student agreement     

Jordan L. Neus 《Assessment & Evaluation in Higher Education》2011,36(3):301-314

Peer assessment has been gaining significant ground as a means of fostering an environment of accountability and responsibility for group projects in higher education. A popular peer assessment method assigns individual grades via a linear relationship to peer assessment scores. Using this method, a group member who receives his or her group’s average peer assessment score is assigned the instructor‐given group grade; the group member who receives a total peer assessment score of zero is assigned an individual grade of zero. Unfortunately, applying this method often requires time‐consuming exploratory data analysis because of the potential for the method to yield a high spread of grades, including grades over 100%. The present study proposes a modification, which accounts for the degree of student agreement. When the modified procedure results in a change from the group grade, the direction of change is always the same, but with smaller magnitude, requiring less subsequent data analysis and instructor time demands. Easy‐to‐modify SAS code for applying the method is presented in the Appendix.  相似文献   

High cycle fatigue life prediction and reliability analysis of aeroengine blades     

张俊红  林杰威  张桂昌  刘海 《天津大学学报(英文版)》2012,18(6):456-464

Based on the nonlinear continuum damage model(CDM) developed by Chaboche,a modified model for high cycle fatigue of TC4 alloy was proposed.Unsymmetrical cycle fatigue tests were conducted on rod specimens at room temperature.Then the material parameters needed in the CDM were obtained by the fatigue tests,and the stress distribution of the specimen was calculated by FE method.Compared with the linear damage model(LDM),the damage results and the life prediction of the CDM show a better agreement with the test and they are more precise than the LDM.By applying the CDM developed in this study to the life prediction of aeroengine blades,it is concluded that the root is the most dangerous region of the whole blade and the shortest life is 58 211 cycles.Finally,the Cox proportional hazard model of survival analysis was applied to the analysis of the fatigue reliability.The Cox model takes the covariates into consideration,which include diameter,weight,mean stress and tensile strength.The result shows that the mean stress is the only factor that accelerates the fracture process.  相似文献   

Reliability as Argument     

Jay Parkes 《Educational Measurement》2007,26(4):2-10

Reliability consists of both important social and scientific values and methods for evidencing those values, though in practice methods are often conflated with the values. With the two distinctly understood, a reliability argument can be made that articulates the particular reliability values most relevant to the particular measurement situation and then the most appropriate evidence and theory to support an argument for the presence of that value. The steps in making a reliability argument are explained and an extended example is given. The article is intended to provoke discussion, debate, and the development of additional reliability methodologies.  相似文献   

感知跳跃测量方法的可靠性研究     

徐玉明  张国海 《体育科学》2004,24(7):49-50

采用实验法及数理统计分析法，对431名大学生的感知跳跃进行多次测量，用单因素方差分析法对测量数据的可靠性进行统计分析。结果表明，性别、测量次数和取值方法是影响测量可靠性的因素。建议在运动员选材、机能评定以及全民健身体质测评工作中推广应用文章中的两种方法。  相似文献   

高职院校教师课堂教学质量学生评价的问卷编制及信效度检验     

高维春  江务学 《辽宁教育研究》2014,(2):65-68

为编制一个可用于高职院校的教师课堂教学质量学生评价测量工具,根据高职院校教师课堂教学质量学生评价存在的问题,在《大学教师教学效果评价问卷(学生用)》基础上创新性地设计了高职院校教师课堂教学质量学生评价问卷(简称VSEEQ),开发了符合教育测量学标准的、现代教学与学习理论支持的VSEEQ评价问卷,施测并搜集了信效度资料。结果表明,VSEEQ评价问卷具有合理的维度结构,较好的内部一致性信度、重测信度、内容效度和结构效度。  相似文献   

可靠性分析在实验室仪器设备管理中的应用     

赵燕滔  权力  许仕君  屈喆  杨佳玲 《实验室研究与探索》2014,33(10):291-293

为提高实验室仪器设备管理水平,探讨在实验室仪器设备管理中引入可靠性分析,分别使用故障树分析的定性方法和平均寿命估计的定量方法进行分析。通过故障树分析,得出故障发生的原因或原因组合,为仪器设备维修提供依据。通过仪器设备平均寿命估计,为维护、更换提供科学依据。  相似文献   

国内外语言评估工具研究     

徐银秀  马红英 《绥化学院学报》2014,34(10):145-149

评估是开展科学有效的言语、语言训练的前提和基础,对语言能力作出准确的诊断评估则需要一定工具。目前,语言评估可以通过标准化测验和非标准化的评估方法进行评估。本文采用文献综述的方法,对现今国外、境外、大陆地区使用范围较广、评价较高的标准化语言评估工具进行介绍,以了解这些工具的主要内容、施测过程、信效度及优缺点,供评估者选择使用。  相似文献   

关于网络中心机房建设管理模式的探讨     

赵飞 《湖北成人教育学院学报》2014,(2):83-84

网络中心机房的建设在教育、企业甚至政府机关都有至关重要的作用,本文分析现有的网络中心机房建设和管理中存在的问题,提出网络中心机房新的建设管理模式,提高网络中心机房的安全可靠性。  相似文献