基于C/S模式的企业MIS系统中性能优化的实现   总被引：1，自引：0，他引：1  

张青锋 《周口师范学院学报》2004,21(5):86-88

论述了大型数据库应用系统的优化技术和方法.首先提出优化的必要性,然后论述了基于C/S模式的企业MIS系统的几种优化原则和部分优化技术,最后介绍了在开发黄石鑫宝管业有限公司的企业MIS系统的过程中用到的几种优化技术和方法.  相似文献   

Doodling Effects on Junior High School Students’ Learning          下载免费PDF全文

Mariam Tadayon  Reza Afhami 《The International Journal of Art & Design Education》2017,36(1):118-125

The main purpose of this study was to assess the effects of doodling on the learning performance of high school female students in Tehran. The design of this research was a pre‐test–post‐test with a control group. A group of 169 junior high school 12–13 year‐old students was chosen for this study. After being taught a section of the Natural Science course, the students were asked to answer questions related to the lessons. After that, their grades were used as the pre‐test scores. The post‐test was carried out after the devised treatment. During ten sessions of the same course and teacher, the students were each given a blank sheet of paper and were asked for doodling if they felt like doing it. After each session, a couple of relevant written questions were asked to evaluate how well students had learned the lessons. The experiment and control group both consisted of 27 randomly selected students; participants in the experiment group were doodlers and those in the control group did not doodle. To evaluate the doodling effect a t‐test analysis was performed. Comparison of the grades showed that the experiment group outperformed the control group significantly.  相似文献   

再生混凝土力学性能的研究   总被引：1，自引：0，他引：1  

徐立民  蒋业浩  吴瑾 《连云港职业技术学院学报》2005,18(2):71-75

对再生混凝土力学性能的研究进行了综述，主要包括再生混凝土力学性能的抗压强度、弹性模量、干缩与徐变。研究表明，和普通混凝土相比，再生混凝土力学性能的抗压强度低，弹性模量小，干缩与徐变较大。最后提出了再生混凝土力学性能需要进一步研究的问题。  相似文献   

浅谈音乐表演中的联想     

杨艳 《湖南科技学院学报》2005,26(8):261-262

音乐表演属于创造性的音乐实践活动，为了更为准确的表达作品情感，音乐表演者在表演时要根据作品内涵充分展开联想，并通过各种途径丰富自己的联想。  相似文献   

不同强度板柱节点混凝土有效强度计算方法探讨     

周贤文 《丽水学院学报》2007,29(2):48-51

对高强混凝土柱和普通混凝土板之间节点混凝土有效强度计算公式进行了综述分析,并结合大量试验结果的分析,得出了比较好的结果.  相似文献   

PEMFC分散发电系统的压力控制研究     

张颖颖  曹广益  朱新坚 《上海大学学报(英文版)》2006,10(3):262-267

NomenclatureA-area ( m2)Dw-membrane water diffusivity ( m2/s)F-=96 487I-current (A)M-molecule mass (kg/mol)T-temperature (K)W-mass flowrate (kg/s)cw-water concentration in membrane ( mol/m3)m-mass (kg)n-cell numbernd-electro-osmotic drag coefficientp-pres…  相似文献   

复合酸化剂对断奶仔猪抗腹泻效果和生产性能的影响     

王治华  陈俊东  尤峰 《安徽科技学院学报》2002,16(1):14-16

通过体外实验和断奶仔猪饲养试验研究了包被复合酸化剂(简称复合酸化剂)的抑菌效果及其对断奶仔猪抗腹泻效果和生产性能的影响.体外试验结果表明,采用抑菌圈法对不同浓度的复合酸化剂进行比较时,以0.2%的浓度显示出较强的抑菌效果,对大肠杆菌、沙门氏菌和乳酸杆菌的抑菌圈直径分别达到了15.0、16.8和13.0 mm.仔猪饲养实验结果表明:与不合酸化剂的对照组或有机酸化剂组相比,在基础日粮中添加了0.2%的包被复合酸化剂可以进一步提高仔猪的生长速度及饲料转化率,同时可以降低仔猪的腹泻率.  相似文献   

制造业管理者元胜任力与行业胜任力和绩效之间关系的实证研究   总被引：2，自引：0，他引：2  

冯明  纪晓丽  尹明鑫 《中国软科学》2007,84(10):126-135

本文利用元胜任力与绩效问卷和制造业管理胜任力问卷进行了大量的调查,研究表明:元胜任力包括思维能力、学习运用能力和自我发展能力三个因子;思维能力能够有效的促进周边绩效和适应性绩效,学习运用能力能够较好的促进整个绩效;思维能力、市场营销策划能力和产品系统管理能力是制造业管理者绩效的有效预测指标。  相似文献   

The effectiveness of workflow management systems: A longitudinal study     

《International Journal of Information Management》2016,36(1):126-141

Workflow management systems coordinate and allocate work through the various stages of executing business processes. The benefits of such systems appear pervasive, but no hard data is available that confirms that their implementation improves organizational performance. In part, this is due to the difficulty of measuring the effects of enterprise-wide initiatives in general. In this paper, the results are presented of a longitudinal, multi-case study into the effectiveness of workflow management technology. The study builds on a novel methodology that combines field work and computer simulations. Through its application, the contribution of this technology to conduct business processes faster and with less effort could be quantitatively assessed. Surprisingly, only a fraction of the projects that were followed in this longitudinal study led to a fully operational implementation of a workflow management system at all. Even so, in most of the projects where such a system was introduced this resulted in substantial improvements. We present success and fail factors for the implementation of this technology within organizations, which we inferred from a follow-up analysis. The novel methodology presented in this paper is thought to be of value to track the performance effects of introducing other technologies or organization concepts as well.  相似文献   

固化土强度特性试验研究   总被引：4，自引：0，他引：4  

董邑宁  张青娥 《科技通报》2003,19(6):477-480

应用不同固化剂对加固软土的作用进行了试验，分析和讨论了固l和固2加固土在不同掺入比和龄期时强度的变化规律及应力一应变特性．从整体加固效果分析看出，固2加固土效果优于固l加固土，两种固化土的最佳掺入比在12％～15％，可在软土地基处理和实际工程中应用．  相似文献