WINDOWS环境下数据采集控制软件的研究

提出了在ＷＩＮＤＯＷＳ环境下利用汇编语言直接对硬件端口进行实时访问的一种方法,利用该方法创建的动态连接库（ＤＬＬ）可以被多种高级语言调用,有效地解决了在Ｖｉｓｕａｌ Ｂａｓｉｃ等开发环境下不能控制硬件的问题。     

Modelling the evolution of a bipartite network—Peer referral in interlocking directorates

A central part of relational ties between social actors is constituted by shared affiliations and events. The action of joint participation reinforces personal ties between social actors as well as mutually shared values and norms that in turn perpetuate the patterns of social action that define groups. Therefore the study of bipartite networks is central to social science. Furthermore, the dynamics of these processes suggests that bipartite networks should not be considered static structures but rather be studied over time. In order to model the evolution of bipartite networks empirically we introduce a class of models and a Bayesian inference scheme that extends previous stochastic actor-oriented models for unimodal graphs. Contemporary research on interlocking directorates provides an area of research in which it seems reasonable to apply the model. Specifically, we address the question of how tie formation, i.e. director recruitment, contributes to the structural properties of the interlocking directorate network. For boards of directors on the Stockholm stock exchange we propose that a prolific mechanism in tie formation is that of peer referral. The results indicate that such a mechanism is present, generating multiple interlocks between boards.     

一种基于密度的无监督联系发现方法

在数据挖掘过程中,利用K-近邻(KNN)算法搜索新颖节点往往具有一定的局限性和偏差性。针对此问题,本文提出了加权距离和相对密度的概念,采用基于加权距离的相对密度来度量一个对象的局部离群程度。在此基础上,提出了一种基于密度的无监督联系发现方法,并进行了实验。实验结果表明,该方法能够较准确地描述对象的异常程度,具有更高的精确度。     

职业教育信息化教学设计浅析

职业教育信息化教学设计是围绕"培养符合社会需求的高素质技能型人才"这一职业教育的培养目标而创造的一种新的职业教育教学模式,其设计过程要融入信息化的教育观念、信息化的教材观念、学生主体观念、教师主导观念,把握好教学内容的选定、教学目标的确立、教学策略的使用、教学过程的设计及教学反思五个环节。     

On the Non-attainability of Chebyshev Bounds

In this department The American Statistician publishes articles, reviews, and notes of interest to teachers of the first mathematical statistics course and of applied statistics courses. The department includes the Accent on Teaching Materials section; suitable contents for the section are described under the section heading. Articles and notes for the department, but not intended specifically for the section, should be useful to a substantial number of teachers of the indicated types of courses or should have the potential for fundamentally affecting the way in which a course is taught.     

多进制LDPC码混合重传联合设计与性能分析

以下一代数字卫星战术数据链通信系统为背景,研究了低复杂度、简单实用多进制低密度校验(LDPC)码与混合自动请求重传(HARQ)技术的联合优化,并且与传统的二进制LDPC码HARQ方案进行了误帧率和吞吐量性能比较。基于C 的链路级仿真结果表明,多进制LDPC码HARQ技术能提供明显的性能改善,尤其是包合并和部分增益型HARQ。此外,多进制LDPC码HARQ在复杂度增加不大的情况下,可提供比二进制LDPC码HARQ更可观的性能增益。     

Distributions and moments of record values in a sequence of maximally dependent random variables

A sequence of possibly dependent random variables is maximally dependent if all the sample maxima in the sequence have stochastically maximal distributions in the class of all distributions with the same marginals. For a sequence of maximally dependent standard uniform random variables, we determine the distribution functions of record times and values. We show that the distribution of the record occurrence times coincides with the respective distribution for the i.i.d. sequence, and the distributions of the record values are stochastically maximal in the class of sequences with the same record times distributions, containing all the exchangeable sequences. We also derive analytic formulae for the moments of record values from the maximally dependent sequence, and compare them with those of the i.i.d. case.     

大学校园文化建设是人才培养的重要环节

高等学校的校园文化,潜移默化地对学生的成长与发展产生着巨大的作用,影响着大学生生活的各个方面,这种影响的走向和态势不仅直接关系着大学生的成才,而且也关系着校园文化发展方向与层次。因此,加强校园文化建设,全面提高大学生的自身素质,培养成功型人才,已成为学校学生工作的重要内容。     

"政行二分"理论的偏移与复归——纪念威尔逊《行政学研究》一文发表暨公共行政学诞生120周年

威尔逊政行二分理论包括两个方面,一是政行分离,二是政行相互依存。前者既指政行功能分离,也指政行领域分离,且领域分离先于功能分离;后者既指功能相互依存,也指领域相互依存,且领域依存先于功能依存。因而,政行二分准确地说是指政行弹性分离。威尔逊之后的行政学家囿于经验,断言政行不分;不仅否定了政行分离的一面,也未深刻领会政行相依的一面。特别是以西蒙为首的决策学派,在该方面造成了恶劣的影响。政行弹性分离并非经验事实,而是政治世界的"理性事实";它源于政治与行政各自不同的本性,自在地先于现实的政治与行政。政行弹性分离是公共行政正常运行的规范前提,是公共行政学迅速发展的首要条件。因此,现实的政行关系是朝着政行弹性分离运动的。展望公共行政学发展120年后的道路,我们依然朝着威尔逊的方向前进。     

网络链接中网络著作权侵权问题探讨

在信息高速发展的今天,浏览网页已成为越来越多人生活中必不可少的活动。由此引起的一个问题就是网络的链接问题。从当下越来越多的网络链接纠纷可以看出:网络链接本身不是没有问题的。本文拟以网络链接所引起的网络著作权纠纷为关注点,从网络链接的含义、分类入手,进而探讨网络链接是否必然引起网络著作权侵权,为我国在网络链接方面的立法规制提供一些依据。