基于VB的滑动轴承试验系统     

张绍林  武红霞  李瑞珍 《中国科技信息》2006,(19):99-100,102

利用传统的滑动轴承试验台与PC机相结合，设计出了一种新型的滑动轴承试验系统。文中介绍了系统的硬件组成及软件设计。采用模块化结构设计了系统工作的软件部分；采用VB调用动态链接库的方法实现试验数据的采集与处理。系统工作稳定可靠，操作界面简单，试验精度比传统试验台高。  相似文献   

市场营销管理中原始信息的收集     

邬晓鸥 《情报理论与实践》2004,27(1):59-61

对原始信息在营销管理中的作用进行了分析，概述了原始信息收集工作的要求，介绍了收集原始信息的3种主要方法：观察法、调查法和试验法。  相似文献   

四川金佛山藓类植物区系的研究     

胡晓云  吴鹏程 《中国科学院研究生院学报》1991,29(4):315-334

通过半个世纪以来对金佛山近2000号藓类植物标本的鉴定，现确定金佛山藓类植物有40科，133   属和245种(包括4亚种、9变种和1变型)。其区系成分以东亚成分为主(33．77％)，其次为温带成分   (28．57％)及热带、亚热带成分(24．68％)。文内还全面分析了金佛山藓类植物区系及我国南北8个山区藓   类植物区系之间的关系，用排序方法统计它们之间的相似性与非相似性系数，并着重就金佛山藓类植物区  系的过渡性特点作了探讨，提出在该山区与其邻近地区，存在一个苔藓植物东亚特有属的分布中心。  相似文献   

湖南蹄盖蕨科二新种     

吴世福  张来发 《中国科学院研究生院学报》1990,28(2):165-167

Two new  species  of  family  Athyriaceae  are  described from  Hunan Province, China. i. e. Athyriopsis hunanensis Z. R. Wang et S. F. Wu, and  Athy-rium tianzeshanense S. F. Wu et L. F. Zhang.  相似文献   

深化大学生信息素质教育的探讨   总被引：13，自引：0，他引：13  

吴海媛  陈彦君 《情报科学》2003,21(2):140-141

本文在分析信息素质教育的含义和高校大学生信息素质状况的基础上，探讨了深入开展大学生信息素质教育的对策。  相似文献   

我国数字图书馆的发展现状及思考   总被引：13，自引：1，他引：13  

吴培红 《情报科学》2002,20(2):222-224

本文调研了我国数字图书馆，包括一些大的文献信息网络服务系统的研究和发展现状，指出存在的问题，提出了今后的发展思路。  相似文献   

Stokes‘s First Problem的差分解法     

巫衡竹 《科技通报》1997,13(6):398-400

将有限差分方法的隐式格式计算公式应用于Ｓｔｏｋｅｓ＇ｓ ｆｉｒｓｔ ｐｒｏｂｌｅｍ求得流场的速度分布。过去通过实验方法测得速度场是一件十分费时费事的事。  相似文献   

赵嘏、杜牧卒年与《唐诗类选后序》作年考论     

吴在庆  常鹏 《福建师范大学学报(哲学社会科学版)》2011,(1)

有学者认为<唐诗类选后序>撰于"咸通元、二年间"或"咸通三年前后",并据此和其他"根据"考订赵嘏卒于大中十二三年,否定杜牧卒于大中六年.经过分析考证,张祜卒于大中八年,杜牧则卒于大中六年底,且顾陶前后两序之撰写时间极为接近,均是大中十年先后所撰,因此赵嘏即约卒于大中八年.  相似文献   

Effects of reviewing annotations and homework solutions on math learning achievement     

Wu‐Yuin Hwang  Nian‐Shing Chen  Rustam Shadiev  Jin‐Sing Li 《British journal of educational technology : journal of the Council for Educational Technology》2011,42(6):1016-1028

Previous studies have demonstrated that making annotations can be a meaningful and useful learning method that promote metacognition and enhance learning achievement. A web‐based annotation system, Virtual Pen (VPEN), which provides for the creation and review of annotations and homework solutions, has been developed to foster learning process among students. In order to explore the effects of reviewing annotations and homework solutions on learning achievement, a quasi‐experiment was conducted with VPEN in a math class over a period of 4 months. It was found that reviewing own text annotations has a significant influence on learning achievement; while on the contrary, reviewing peers' text annotations has no significant influence on learning achievement. Our results show that students gain more from reviewing their own annotations than from reviewing the annotations made by peers, a contrast which reveals that annotations hold additional meaning for their creators. Further investigation revealed that only the quantity of text annotations among all other variables can significantly predict students' learning achievement. This finding may suggest that text annotations play more important roles to learning achievement than other variables, like homework. The reason is because text annotations are created by learners actively on voluntary base whereas homework is usually assigned by the teachers. Based on our findings, we suggest that teachers may consider incorporating learning activities that can foster metacognitive development into the learning process, like making annotations, solving homework and reviewing them, whereas peer learning should be encouraged only for reviewing the homework solutions of their peers with good learning achievement.  相似文献   

Use of peer feedback to enhance elementary students' writing through blogging     

Yu Liang Chen  Eric Zhi Feng Liu  Ru Chu Shih  Chin Tsung Wu  Shyan Ming Yuan 《British journal of educational technology : journal of the Council for Educational Technology》2011,42(1):E1-E4

  相似文献