复习C语言应注意的几个方面(之三)——针对CCTC语言函数部分     

刘丽梅  李军 《承德职业学院学报》2005,(2)

本文主要针对CCT中的C语言部分,在复习时应该注意的几个方面,以讲、例结合的方式作了详细的论述。  相似文献   

流媒体中一种高质量视频内容的设计     

陈敬远 《浙江传媒学院学报》2004,11(2):33-36

结合当前流行的流媒体技术,深入分析了流媒体技术及其文件格式,讨论了如何实现流媒体高质量的视频内容.在此基础上,本文实现了一个基于流媒体的高质量视频内容的设计.  相似文献   

在PHP中利用绑定变量提高Oracle的存储效率     

白海燕  刘强 《现代图书情报技术》2004,(1):84-85,90

介绍了Oracle的存储结构和共享机制以及在PHP中利用绑定变量实现SQL语句共享的方法。  相似文献   

Four pitfalls in normalizing citation indicators: An investigation of ESI’s selection of highly cited papers     

Zhigang Hu  Wencan Tian  Shenmeng Xu  Chunbo Zhang  Xianwen Wang 《Journal of Informetrics》2018,12(4):1133-1145

InCites Essential Science Indicators is becoming increasingly used to identify top-performing research and evaluate the impact of institutes. Unfortunately, our study shows that ESI indicators, as well as other normalized citation indicators, have the following flaws. First, the publication month and the online-to-print delay affect a paper’s probability of becoming a Highly Cited Paper (HCP). Papers published in the earlier months of the year are more likely to accumulate enough citation counts to rank at the top 1% compared with those published in later months of the year. Papers with longer online-to-print delays have an apparent advantage for being selected as HCPs. Research field normalizations lead to the third pitfall. Different research fields have different citation thresholds for HCPs, making research field classification important for a journal. In addition, the uniform thresholds for both articles and reviews in ESI affect the reliability of HCP selection because, on average, reviews tend to have higher citation rates than articles. ESI’s selection of HCPs provides an intuitive feel for the problems of normalized citation impact indicators, such as those provided in InCites and SciVal.  相似文献   

中立型泛函微分方程正周期解的存在性     

刘兴元 《怀化学院学报》2007,26(5):1-4

应用锥上不动点理论讨论了一类包含许多时滞人口模型的泛函微分方程的正周期解的存在性.  相似文献   

Gender-preferential intergenerational patterns in primary educational attainment: An econometric approach to a case in rural Mindanao,the Philippines     

《International Journal of Educational Development》2016

This study investigates the factors determining children's educational attainment, focusing on gender-differential intergenerational patterns, by employing a case study from rural Mindanao. The result mainly shows, unlike general trends in developing countries, educational attainment is more favorable for girls; maternal education level is equally associated with daughters’ and sons’ education levels, and paternal education level is preferentially favorable to their sons. To reduce the disparity, suggestions include providing boy-specific interventions to enhance the magnitude of the father–son educational virtuous circle and comparing the magnitude of gender-equal maternal and boy-preferential paternal education influences to specify which effect is larger.  相似文献   

亲子互动治疗研究的新取向     

魏晓娟 《中国特殊教育》2007,(9):93-96

随着亲子互动治疗的研究和应用范围扩大,亲子互动治疗研究出现新的取向:亲子互动治疗的应用范围明显扩大,亲子互动治疗的实施方法出现变异和创新,开始关注影响治疗效果的治疗师等变量,治疗过程中患者的离开现象引起了研究者的重视等。其研究的新取向为我国心理治疗领域的深入和拓展提供了新的研究思路。  相似文献   

用分离变量法求静电场问题的新思路     

蒋逢春  董红 《商丘师范学院学报》2004,20(2):166-168

给出一种用分离变量法求解均匀介质球内外放有点电荷或自由偶极子等类问题电势的新方法．  相似文献   

单片机延时方法的分析及应用     

周绍平 《江苏广播电视大学学报》2005,16(6):58-60

单片机开发应用中经常用到延时控制，延时控制的基本方法有纯软件、纯硬件及软硬件结合方法，它们都有各自的特点及应用范围，以1秒延时为例给出用三种方法实现的过程，并介绍了软硬件结合延时的应用实例。  相似文献   

随机变量的熵与标准熵     

王雪琴 《三门峡职业技术学院学报》2003,2(4):33-34

本文研究随机变量的熵与标准熵、标准差之间的关系,得出的结论是:对于离散型的随机变量熵与标准熵相等,与标准差无关;对于连续型随机变量ξ(ξ是的ξ标准化随机变量),熵H(ξ)等于它的标准熵H(ξ)加标准差的对数σ。从而揭示出两类常见的随机变量之间的本质性差异:离散型随机变量的不确定度与离散度无关,连续型随机变量的不确定度与离散度(标准差)呈对数关系。  相似文献