圆周上的范德瓦尔登数

The big upper bound of typical van der Waerden number was investigated through calculating the van der Waerden number on a circle. And the van der Waerden number Wh (3,3) = 9, Wh (3,3,3)≥25 on a circle was calculated by computer.     

Windows环境上机考试自动评分算法的研究

针对Windows平台上机操作考试,阐述了通过面向对象、OLE自动化技术和VBA嵌入式编程实现计算机自动评分的策略,及各种常见操作类型的自动评分算法实例。     

GPS在井位放样测量中的应用

GPS技术在井位测量中已得到迅速推广使用，本文针对壳牌公司对长1井位测量提出的严格要求和较高精度的条件下，介绍采用GPS技术进行长1井井位的放样工作，包括放样方案的制定、网形设计、数据处理及精度评定，通过比较分析得出最佳成果。     

论电子商务的知识产权保护及对策

电子商务是因特网发展到高级阶段的产物，是世界经济新的增长点，但同时也存在一系列法律问题，本文拟从知识产权的角度分析电子商务所涉及到的法律问题，并就我国实际情况提出了5条建议，期盼我国早日制定一部既与国际电子商务相互衔接又能反映中国特色的中国电子商务知识产权法规。     

技术监测方法在纳米技术领域的应用研究

文章通过简要介绍纳米技术的重要意义指出对纳米技术领域进行监测的必要性，并对其进行了详细的实证监测分析评估，最后根据纳米技术的监测结果对发展我国纳米技术提出了政策建议。     

知乎问答社区回答者知识贡献行为受同伴效应影响研究

社会化问答社区的出现改变了原有的问答模式并拓展了知识获取的途径。回答者作为知识的主要贡献者,是促进问答社区内知识传递的核心要素。现有关于问答社区用户的研究普遍以用户的属性数据为依据,较少考虑使用个体连接所形成的关系数据进行分析。本文以中文问答社区"知乎"为研究对象,爬取了"流行音乐"和"英语学习"两个话题下的大规模数据,通过构建回答者关注关系网络,定义和量化直接连接和间接连接两类同伴关系,使用网络自回归模型探究同伴效应对知识贡献行为的影响。研究发现,回答者的知识贡献行为会受到直接和间接连接同伴效应的正向影响,但是间接连接同伴效应会随着回答者网络密度的增加而逐渐减弱甚至消失,聚类系数对回答者的知识贡献行为有负向影响。     

典籍分类与学术演进——论《葆醇堂藏书录》的八分法体系

朱文藻编著的《葆醇堂藏书录》采用"经、艺、史、志、子、集、类、说"八分法,试图打破四部分类框架。他整合小类设立艺部,把志部、类部、说部提升为一级类目,调整部分二、三级类目的划分、名称和顺序,对类书的性质和丛书的价值做出新认识,反映出以小学、金石学、舆地之学等为代表的乾嘉学术风貌。《葆醇堂藏书录》本着灵活变通的编目原则,力求突破四分法的桎梏,在图书分类上体现学术发展,是古籍目录辨章学术、考镜源流的积极尝试。     

采访数字资源的版权风险和应对策略探讨

数字资源采访实践工作中,图书馆面临着极大的版权风险。基于近年来图书馆数字资源相关版权纠纷统计分析,总结采购数字资源中的版权风险主要包括数字资源中含侵权作品、合同风险、服务风险等。图书馆应该对我国著作权相关法律中图书馆的版权例外保护条款和数字资源采访中的版权风险有充分而深入的认识,积极参与相关法律法规的完善,加强对数字资源供应商、资源合法性和合同的审查,强化数字资源服务中的技术保护措施、注意和告知义务,并制定图书馆版权管理办法。     

Genetic analysis for brix weight per stool and its component traits in sugarcane （Saccharum officinarum）

Brix weight per stool (BW) of sugarcane is a complex trait, which is the final product of a combination of many components. Diallel cross experiments were conducted during a period of two years for BW and its five component traits, including stalk diameter (SD), stalk length (SL), stalk number (SN), stalk weight (SW), and brix scale (BS) of sugarcane. Phenotypic data of all the six traits were analyzed by mixed linear model and their phenotype variances were portioned into additive (A),dominance (D), additive×environment interaction (AE) and dominance×environment interaction (DE) effects, and the correlations of A, D, AE and DE effects between BW and its components were estimated. Conditional analysis was employed to investigate the contribution of the components traits to the variances of A, D, AE and DE effects of BW. It was observed that the heritabilities of BW were significantly attributed to A, D and DE by 23.9%, 30.9% and 28.5%, respectively. The variance of A effect for BW was significantly affected by SL, SN and BS by 25.3%, 93.7% and 17.4%, respectively. The variances of D and DE effects for BW were also significantly influenced by all the five components by 5.1%～85.5%. These determinants might be helpful in sugarcane breeding and provide valuable information for multiple-trait improvement of BW.