Modular-transform based clustering

Spectral clustering uses eigenvectors of the Laplacian of the similarity matrix. It is convenient to solve binary clustering problems. When applied to multi-way clustering, either the binary spectral clustering is recursively applied or an embedding to spectral space is done and some other methods, such as K-means clustering, are used to cluster the points. Here we propose and study a K-way clustering algorithm – spectral modular transformation, based on the fact that the graph Laplacian has an equivalent representation, which has a diagonal modular structure. The method first transforms the original similarity matrix into a new one, which is nearly disconnected and reveals a cluster structure clearly, then we apply linearized cluster assignment algorithm to split the clusters. In this way, we can find some samples for each cluster recursively using the divide and conquer method. To get the overall clustering results, we apply the cluster assignment obtained in the previous step as the initialization of multiplicative update method for spectral clustering. Examples show that our method outperforms spectral clustering using other initializations.     

网络舆论倾向性的动态跟踪方法及实证研究

从统计学视角审视网络舆论倾向性的监测问题,提出了以粗糙分类器为基础建立舆论倾向性分类模型,将复杂的预警指标体系简化为单一直观的跟踪统计量,并通过跟踪统计量动态跟踪舆论倾向性变化轨迹的研究方法。实证研究以2011年郭美美事件相关新闻跟帖为对象。分析表明,网络舆论的消极倾向性在整个事件发展过程中呈持续增长,与基本事实相符,证实了方法的可行性和适用性。     

春节模型的设计与应用

 季节调整是经济数据预处理中非常重要的一个步骤。现有的主流季节调整方法X-12-ARIMA 和TRAMO/SEATS中都包含节假日因素的调整。由于不同的国家节假日一般不同,因此各国在进行经济数据的季节调整时,都需要结合本国的假日对季节调整方法进行修正。春节是中国最为重要而且持续时间最长的节日,具体日期可以出现在一月也可以在二月。本文基于X-12-ARIMA方法,同时考虑春节对经济指标的正负性影响效应、春节影响的变化速率以及春节效应的时长三个因素,设计了十二个不同类型的春节模型。本文应用Eviews软件和Demetra软件,采集不同的经济指标,对所设计的春节模型进行了应用研究,并根据异常值改善标准,对最佳的春节模型进行了选择与比较分析。     

Case–control genome-wide joint association study using semiparametric empirical model and approximate Bayes factor

We propose a semiparametric approach for the analysis of case–control genome-wide association study. Parametric components are used to model both the conditional distribution of the case status given the covariates and the distribution of genotype counts, whereas the distribution of the covariates are modelled nonparametrically. This yields a direct and joint modelling of the case status, covariates and genotype counts, and gives a better understanding of the disease mechanism and results in more reliable conclusions. Side information, such as the disease prevalence, can be conveniently incorporated into the model by an empirical likelihood approach and leads to more efficient estimates and a powerful test in the detection of disease-associated SNPs. Profiling is used to eliminate a nuisance nonparametric component, and the resulting profile empirical likelihood estimates are shown to be consistent and asymptotically normal. For the hypothesis test on disease association, we apply the approximate Bayes factor (ABF) which is computationally simple and most desirable in genome-wide association studies where hundreds of thousands to a million genetic markers are tested. We treat the approximate Bayes factor as a hybrid Bayes factor which replaces the full data by the maximum likelihood estimates of the parameters of interest in the full model and derive it under a general setting. The deviation from Hardy–Weinberg Equilibrium (HWE) is also taken into account and the ABF for HWE using cases is shown to provide evidence of association between a disease and a genetic marker. Simulation studies and an application are further provided to illustrate the utility of the proposed methodology.     

铅蓄电池正极材料的X射线衍射分析

本文用X射线衍射法对铅蓄电池正极活性材料二氧化铅进行了结构分析。结果表明:正极的二氧化铅同时存在二种不同的晶体结构。正方晶系的β—PbO_2主要分布在电极表面,针方晶系的α—PbO_2则分布在电极内部。如果将块状电极碾磨测量,α—PbO_2与β—PbO_2的含量几乎是相等的。     

探索高校马克思主义哲学课堂教学新方法

在高校马克思主义哲学的课堂教学中,自觉地引入“友善用脑”新思路、大胆地探索“友善用脑”新方法,从根本上贯彻和维护“以学生为本”,是全面实施素质教育的重要举措。     

论物权的正当性与物权法定原则

洛克的自然权利说、黑格尔的意志说、庞德的社会学说、波斯纳的经济说等从不同角度和不同层面揭示物权正当性的哲学基础,要正确全面理解物权正当性的内涵,应当从权利主体要求的有效性、权利来源的权威性、权利主体自由的重要性、权利和利益的相关性、权利的道德性以及权利的效率性等方面综合考察.实现物权的正当性,应当将应然的物权法定化(正当化),物权法定原则对实现物权正当性起到关键性作用.但是物权法定原则在某种程度上也阻碍物权正当化的进一步实现.我们应坚持物权法原则定的同时,又要以发展的眼光对待法,在法定物权不能满足正当性要求时,应当及时对法律进行修改.     

把握正确舆论导向服务全省工作大局

追求正确、积极的舆论导向是我国新闻媒体的必然要求.坚持正确的新闻舆论导向必须坚持"五个有利于",服从服务于全党的工作大局.本文从用"三个代表"重要思想统领宣传工作;围绕中心,服务大局,宣传好省委、省政府的决策部署;把握正确舆论导向,提高宣传引导水平等三个方面论述了河北电视台在把握正确舆论导向,服务全省工作大局中做出的贡献.     

人文关怀：大学生思想政治工作的生态链

人文关怀是我国大学生思想政治工作的一个基本维度。加强人文关怀,创建一个有利于沟通和共鸣的人性化环境,是大学生思想政治工作的基础和前提,是提高大学生思想政治工作水平和成效的重要手段。在文化多元化的背景下,大学生思想政治工作要通过提高教师和管理者的人文素质,倡导、实践人文关怀,回归工作重心,润滑连接纽带,延伸工作的内容和手臂,建立多维评价体系,营造大学生思想政治工作的绿色走廊和生态环境。     

园区网络运行综合监测系统的设计与实现

针对园区网络日常运行中网管员要持续关注的机房环境、网络服务状况、链路畅通与性能状况,设计实现了一个综合监测报警系统,首次将机房环境与服务器、链路运行状态及性能监测融于一体,并能依据可自定义的报警策略实施有效的声光、邮件、短信方式报警,充分符合网络运行维护的实际需求.文中描述了整个系统的体系结构、利用面向对象技术实现的关键模块,总结了实际应用的效果.