负载扰动作用下电液位置伺服系统的校正设计

介绍了负载扰动对电液位置伺服系统动态性能的影响以及负载误差的计算,利用MATLAB／simu—link环境,对负载扰动作用下的典型电液位置伺服系统进行了稳定性分析,并采用超前校正方式对系统进行了校正设计．     

K/Na-Mo复合变质对M2高速钢组织和性能的影响

用K／Na-Mo复合变质剂对M2铸造高速钢进行变质处理,对试样进行组织分析及力学性能测试．结果表明,随着K／Na-Mo复合变质剂的加入,M2高速钢中铸态碳化物趋于断网,骨状晶转变为等轴晶,组织得到了优化,同时M2高速钢的韧性明显提高,硬度和红硬性也有所改善．     

基于profiling系统的软硬件划分方法研究

通过对path profiling和loop profiling对软硬件划分作用的分析,发现了在特定条件下pathprofiling相对于loop profiling的优点,并提出了一个新的基于profiling系统的软硬件划分的方法。     

关于心理教育评价的思考

心理教育评价是一个亟待探索的新领域,心理教育评价涵盖目标评价、过程评价和结果评价。评价应注重综合性、情境性和对话式,评价中则要充分考虑评价的教育性、发展性、主体性、客观性和全面性。心理教育评价标准可以从教师、学生、教育过程三个维度制定,心理档案袋是心理教育评价的有效方式之一。     

二十世纪汉魏六朝隐逸诗研究综述

20世纪80年代以前,人们对汉魏六朝隐逸诗的研究少有涉及;后20年,关于汉魏六朝隐逸诗的研究大大加强,研究的角度和覆盖面较之以前都有较大的突破。但大多注重研究诗人个体的隐逸思想及诗作,缺乏对这一时期隐选诗的总体透视。     

法治离我们有多远——我国建设法治国家的历程和反思

法治作为人类现代政治文明的主要成果,已得到人们普遍的认同,作为当今世界潮流,也已是不争的事实。我国近代以来,以法治取代人治成为无数仁人志士终身为之奋斗的目标。百年过去后的今天,可以说建设法治国家已成为全国上下痛定思痛后取得的共识。但考察我们的法治进程可以看到,这种所谓共识只是表面的。我们的现实和历史让我们举步维艰。要真正建设法治国家,从理论到实践,我们都有很漫长的路要走。     

设备远程故障诊断系统研究

研究了设备远程监测和故障诊断技术的国内外开发应用现状,提出了基于Internet的设备远程监测和故障诊断系统模型,简述了其运行模式.     

The impact of alternative authentic assessment outcomes in Palestinian fourth grade math classrooms

Focusing on evaluating students’ performance in basic math classrooms, the researchers in this study examined the impact of alternative assessments on learning outcomes in fourth grade Palestinian classrooms. Representing a large sector of education in the Palestinian territories, fourth grade students were randomly selected to participate in the study in which they participated in various math instructional and assessment activities throughout multiple lessons and cycles. Alternative assessment approaches were used including student self- assessment, peer assessment, and teacher assessment in terms of three main achievement levels to measure the extent to which students learned the math concepts by recall and remembrance, ability to apply, and making inferences. Mixed Design ANOVA measures were used to analyze and interpret the results which showed significant trends and correlations across the four cycles of math instruction and indicated that alternative authentic assessment methods have had a positive impact on students’ learning and application of math. Implications for integrating authentic assessment measures as well as peer and self- assessments were drawn in light of the promising outcomes of augmenting student motivation and developing critical life-long skills.