大学英语四、六级听力过关攻略     

王蕊 《青岛职业技术学院学报》2001,14(4):56-58

英语四、六级考级证书在大学生谋职过程中起着重要的作用。测试中听力是大部分考生的弱项 ,针对这一情况 ,本文从几个方面阐述了听力过关的诀窍  相似文献   

三维地质力学模型试验中光纤传感器的应用研究   总被引：1，自引：0，他引：1  

李仲奎  王爱民 《实验技术与管理》2006,23(12):57-60

近年来，在地下结构三维地质力学模型试验的研究中。多项新技术得到应用和开发，其中也包括采用光纤传感器量测模型材料中的应变和变形，这使模型试验上了一个新台阶。采用光纤传感器量测。对于地质力学模型试验来说还是一项新技术。该文结合在一个大比尺的地质力学模型试验中采用光纤传感器的经验，对它的实际应用及埋设方法做了进一步的探讨和设想。  相似文献   

飞机结构静强度与疲劳试验双向加载技术研究     

王逾涯  李岷  陈群志  张蕾  崔常京 《实验室研究与探索》2007,(11)

选取橡胶块胶板式、聚氨酯密封胶灌注式和双组分PU密封胶灌注式三种加载块与飞机结构模拟件粘接后,采用MTS810液压伺服疲劳试验机通过施加拉-压双向载荷的静强度和疲劳寿命试验方法完成了可行性研究,然后在某型飞机减速板进行了双向加载试验的考核验证,从而发展了一种施加拉-压双向载荷的试验方法。该方法能够满足复杂飞机结构静强度和疲劳试验中施加拉-压双向载荷的技术要求。试验结果表明,与传统加载所采用的胶布带相比,三种形式加载块的静强度、疲劳性能和加载速率均有明显提高。  相似文献   

The meaning of teacher education in an exam-oriented education system: lessons from novice secondary teachers in Korea     

Jina Ro 《Asia-Pacific Journal of Teacher Education》2019,47(4):399-413

This study investigated four novice secondary teachers’ experience and perceptions of teacher education in relation to their current work experience in a high-stakes testing context. The novice teachers commonly indicated that their preparation, which had focused on content expertise, turned out to have little significance in schools, as they mainly executed teaching to the test. Instead, their role as homeroom teachers, which was concerned with caring and supporting students, was found to have much more significance. Accordingly, they indicated that teacher education must more strongly emphasise preparing teachers for that role, which requires them to become mature, considerate, and autonomous educators. Based on this finding, this study suggests the need for a clearer conception of and emphasis on the subjectification function of teacher education that is grounded in the consideration of the fundamental vision, purpose, and meaning of teacher education in a society.  相似文献   

第4代白盒测试方法的理论研究     

程强 《宁波职业技术学院学报》2007,11(2):94-97

介绍了第4代白盒测试方法的理论,描述了3个关键领域内9项关键特征的概念与固有特征。同时介绍了白盒测试发展历程,对比说明了第4代白盒测试方法(4GWM)与以往测试方法的异同及优化要素。  相似文献   

结构抗震实验中的批量数据处理软件开发及应用     

周亦新  裴强 《大连大学学报》2007,28(6):76-80

结构抗震实验中通常会得到大量的实验数据,本文针对大数据量处理,利用Fortran 90与Graphic Lan-guage Editor(GLE)语言开发了数据分析软件,包括常规的FFT谱、加窗、滤波、功率谱、传递函数、相干函数、倒频谱、功率谱、相关以及场地谱比分析等,软件达到了以最少的输入参数得到最多的输出结果,尤其适合对批量数据进行分析和处理,并且同时完成计算分析和绘图功能.  相似文献   

基于小波去噪的快速定点ICA及其在振源识别中的应用     

武志勇  陈茜 《顺德职业技术学院学报》2006,4(1):6-8,12

在多源激励情况下,从传感器阵列输出的高维响应中分离、识别不同振源的性质,对于大型结构振动分析以及对其状态监测与健康评价有着重要的意义.本文结合大型结构振动的性质,介绍了小波阈值去噪原理,使用其改进的快速定点算法实现了多源激励情况下振源信息分离的方法.文中通过实例给出了这种方法的应用效果.  相似文献   

Development and Application of a Two-Tier Diagnostic Test for High School Students’ Understanding of Flowering Plant Growth and Development     

Sheau-Wen?LinEmail author 《International Journal of Science and Mathematics Education》2004,2(2):175-199

This study involved the development and application of a two-tier diagnostic test measuring students understanding of flowering plant growth and development. The instrument development procedure had three general steps: defining the content boundaries of the test, collecting information on students misconceptions, and instrument development. Misconception data were collected from interviews and multiple-choice questions with open response answers. The data were used to develop 13 two-tier multiple-choice items. The conceptual knowledge examined was flowering plant life cycles, reproduction, precondition of germination, plant nutrition, and mechanism for growth and development. The diagnostic instrument was administered to 477 high school students. The correlation coefficient of test-retest was 0.75. Difficulty indices ranged from 0.24 to 0.82, and discrimination indices ranged from 0.32 to 0.65. Results of the Flowering Plant Growth and Development Diagnostic Test suggested that students did not acquire a satisfactory understanding of plant growth and development concepts. Nineteen misconceptions were identified through analysis of the items that could inform biology instruction and resource.  相似文献   

液化气罐工作应力测量和评估     

于敏  缑瑞宾  仇飞 《安徽科技学院学报》2016,30(3):75-80

为了评估局部受损液化气罐的应力水平,利用气压试验对罐体进行加载,采用电测法对罐体缺陷区、封头焊缝热影响区和母材区的应力进行测定。结果表明,凹坑区域呈现出较高的应力水平,最大应力位于凹坑中心,为436 MPa(1.12 Rel),该区域的高应力水平在湿H2S腐蚀环境中易引发局部应力腐蚀;受焊接残余应力的影响,罐体总应力有可能进一步增加;罐体继续使用前应对变形部位进行局部消除残余应力热处理,罐体内部定期进行表面探伤。  相似文献   

"非典"隔离对警官学院学员情绪影响的调查     

陈立成  解志考  梁春生  鲁会杰 《河北北方学院学报(医学版)》2005,22(3):22-25

目的:了解警官学院学生在"防非"隔离时期的情绪状态.方法:采用症状自评量表、焦虑自评量表、抑郁自评量表和抑郁形容词检查量表对因"防非"被隔离的部分一年级警官大学生进行调查.结果:处于隔离期的警官大学生在四个量表的得分情况显著高于全国常模,并且以焦虑和抑郁情绪为主,不存在性别差异.结论:警官大学生在"防非"隔离这一特殊时期的心理健康状态不如平时.所以在某些特殊时期,更应采取针对性措施保障学生心理健康.  相似文献