学科教师网志行为案例分析

本文主要通过案例实证的研究方式,选择一个地区网络教研社群小学语文30位学科教师的网志,从一般网志功能应用行为、学科教学日志内容写作行为、学科教师之间交流行为三个方面,分析学科教师网志行为发生的实际数据,来获得对网志技术应用现状水平的认识和了解,从而为学科教师、学科教研活动组织如何更有效利用和发挥网志各种功能与价值提供参考和建议。同时也从研究方法与思路上,为教育网志的分析研究提供参考。     

谈电气控制技术课程的改革与实践

从“双证”融通出发进行课程教学内容整合,注重理论教学与实践教学改革的统一,引进新技术、新知识,并结合工程实际加强学生的动手能力,培养学生的就业本领,实现零距离就业,是提高电气控制技术课程教学效果的有效方法。     

基于新型自适应遗传算法的直线感应电机的优化设计(英文)

为了提高直线感应电机的力能指标,提出一种新型自适应遗传算法,并对直线感应电机进行了优化设计.采用佳点集理论对遗传算法的初始化种群进行均匀设计,提高了遗传算法的优化效率.同时利用sigmoid函数改进了交叉概率和变异概率,使交叉率和变异率按照个体的适应度在平均适应度和最大适应度之间随sigmoid曲线进行非线性调整.在分析直线感应电机与旋转电机物理结构差异的基础上,得到考虑边端效应的直线感应电机的稳态性能,并给出直线感应电机力能指标的优化模型.通过对优化后的设计方案与原设计方案的比较发现:直线感应电机的力能指标显著提高,验证了方法的有效性.     

间氯甲苯在Cu/LaPO_4催化剂上的水解反应动力学

本文研究了间氯甲苯在Cu／LaPO4催化剂上的水解反应动力学,建立了初始经验速率方程,在此基础上讨论了可能的反应机理,并发现Cu对间氯甲苯水解反应的促进作用．     

Comparison of various procedures for progressive collapse analysis of cable-stayed bridges

Alternate path(AP) method is the most widely used method for the progressive collapse analysis,and its application in frame structures has been well proved.However,the application of AP method for other structures,especially for cable-stayed structures,should be further developed.The four analytical procedures,i.e.,linear static,nonlinear static,linear dynamic,and nonlinear dynamic were firstly improved by taking into account the initial state.Then a cable-stayed structure was studied using the four improved methods.Furthermore,the losses of both one cable and two cables were discussed.The results show that for static and dynamic analyses of the cable-stayed bridges,there is large difference between the results obtained from simulations starting with either a deformed or a nondeformed configuration at the time of cable loss.The static results are conservative in the vicinity of the ruptured cable,but the dynamic effect of the cable loss in the area farther away from the loss-cable cannot be considered.Moreover,the dynamic amplification factor of 2.0 is found to be a good estimate for static analysis procedures,since linear static and linear dynamic procedures yield approximately the same maximum vertical deflection.The results of the comprehensive evaluation of the cable failure show that the tread of the progressive failure of the cable-stayed bridges decreases when the location of the failed cables is closer to the pylon.     

学术职业的运行规则——激励大学教师的若干原则探析

在大学这类学术组织当中,学术共同体对从事学术职业的大学教师在增进与传播知识过程中所做出的贡献而给予的承认和荣誉,被人们更为看重,因此,设计较好的激励制度以让大学教师职业效能更好地发挥至关重要。激励制度设计应当充分考虑大学的组织特性和大学教师的职业性质,进而遵循某些制度设计的原则。如大学的适度分层(分类);激励能真正测量大学教师表现的有效信息;激励的强度适当;对大学教师的监督最小化等等。     

闽籍近代学者与莎士比亚

近代著名翻译家严复、林纾及辜鸿铭对莎氏及其戏剧的译述、评论,与最早引进莎士比亚的林则徐,蔚成了闽籍近代学人与莎氏关系的一道亮丽的戏剧文化景观,也见证了闽籍思想家、学者在中国莎学创始期的卓异的历史贡献.     

从活动走向课程:高职院校活动课程开发研究

分析了当前高职院校活动课程开设的优势,以及活动课程的理论基础、价值诉求和基本特点,提出了高职院校活动课程设计、开发与实施的路径。     

Theoretical and experimental research on heat transfer performance of the semi-open heat pipe

This paper focuses on the heat transfer performance of semi-open heat pipe which is a new type of heat pipe. After analyzing its condensation heat transfer mechanisms theoretically, several semi-open heat pipes in different length ratios and upper hole diameters are studied experimentally and compared with the same dimensions closed heat pipes. Experimental results show that the heat transfer performance of semi-open heat pipe becomes better by increasing heat transfer rate. At the first transitional point, the heat transfer performance of semi-open heat pipe approaches the level of the closed heat pipe. It is suitable to choose upper small hole about 1 mm in diameter and length ratio larger than 0.6 for the semi-open heat pipe.     

DEL RBC transfusion should be avoided in particular blood recipient in East Asia due to allosensitization and ineffectiveness

Previously, both primary and secondary anti-D alloimmunizations induced by "Asian type" DEL (RHD1227A allele) were observed in two incidents. We investigated how often these alloimmunization events occur. The transfusions of any D-negative patients were investigated in the First Affiliated Hospital of Xi’an Jiaotong University Medical College, China, during the entire 2009. The antigens of D, C, c, E, and e were routinely serotyped. The "Asian type" DEL variant was genotyped and the RHD heterozygote was determined through two published methods. The changes in anti-D levels were monitored by the indirect antiglobulin test (IAT) and flow cytometry. Thirty D-negative transfused patients were included in the study. We focused on 11 recipients who were transfused with packed red blood cells (RBCs) from DEL donors at least one time. Of those 11 recipients, seven were anti-D negative before transfusion and four were anti-D positive (one patient with an autoantibody). One of the seven pre-transfusion anti-D negative patients produced a primary-response anti-D after being transfused with 400 ml of DEL blood twice. All four pre-transfusion antibody positive patients were not observed hemoglobin (Hb) levels increased, as expected after transfusions. Two patients had an increase in anti-D from 1:8 to 1:64 by IAT, which was also shown by flow cytometry. None of the patients experienced an acute hemolytic episode. Our data indicated that the primary anti-D induced by DEL transfusion or the secondary anti-D elevated by DEL in a truly D-negative patient might not be unusual. We suggest that a truly D-negative childbearing-aged woman should avoid DEL transfusion to protect her from primary anti-D allosensitization. In addition, anti-D positive recipients should also avoid DEL red cell transfusion due to the delayed hemolytic transfusion reaction (DHTR).