社会主义荣辱观一高校学生思想政治工作的价值坐标

党的十七大报告指出要“用社会主义荣辱观引领风尚”。对大学生的荣辱观教育是当前和今后一个时期高校思想政治工作的重要任务。要认清当前大学生的荣辱观现状，以荣辱观为价值坐标，采取切实有效措施，引领高校思想政治工作。     

关于多元函数的极值

建立了ｋ次齐次函数的正（负）定概念,得到了多元函数的极值判定定理     

论传播场的基本特征

传播场是传播模式研究史上最具现代性的内容之一。以自然场的观点观照传播过程,以口语这一主要的和基本的传播媒介进行分析,可以发现传播场在基本方面具有传播主体的两极性、传播主体在传播实践中所受到的多维制约力、制约力具有方向性和可变性、传播主体与媒介具有同质特征以及主体和媒介具有可观察的个性和共性的二象性等与自然场基本同构的特征。     

球坐标系中的复源点方案及其意义

从球坐标的角度考虑,建议一种引入复源点虚坐标的方案,利用这种方案可以实现对非高斯波束场的直接模拟,文中例举了以这种方案对孔径衍射场的复源点仿真。     

论主权民族在“族裔同质国家”的构建

主权民族就是"享有国家主权的民族",与"国族"、"政治民族"等概念具有相同的外延和内涵,只是侧重点不同。"族裔同质国家"构建主权民族有"国族一体式构建"、"代表式构建"和"共同创设式构建"三种方式。     

The Finite Time Ruin Probability of a New Risk Model Based on Entrance Process

In this article, we consider a new insurance risk model based on the entrance process proposed in Li et al. (2005 Li , Z. , Zhu , J. , Chen , F. ( 2005 ). Study of a risk model based on the entrance process . Statist. Probab. Lett. 72 : 1 – 10 .[Crossref], [Web of Science ®] , [Google Scholar]), and investigate the finite time ruin probabilities of this model. It is showed that an exponential upper bound for the finite time ruin probability exists, when the distributions of the claim size are light tailed. Furthermore, when the distributions of the claim size are heavy tailed, an asymptotic formula for the finite time ruin probability is obtained.     

A robust Parafac model for compositional data

Compositional data are characterized by values containing relative information, and thus the ratios between the data values are of interest for the analysis. Due to specific features of compositional data, standard statistical methods should be applied to compositions expressed in a proper coordinate system with respect to an orthonormal basis. It is discussed how three-way compositional data can be analyzed with the Parafac model. When data are contaminated by outliers, robust estimates for the Parafac model parameters should be employed. It is demonstrated how robust estimation can be done in the context of compositional data and how the results can be interpreted. A real data example from macroeconomics underlines the usefulness of this approach.     

VTR走带系统的齐次坐标变换

提出了一种分析磁带录像机(VTR)螺旋扫描走带系统设计参数、坐标计算及描述误差传递的数学方法.这种方法系统性强并有利于编程计算,已应用于本校录像系统生产技术研究院机电一体化研究室的研究工作,是空间复杂问题分析的一种有效方法.     

Penalized angular regression for personalized predictions

Personalization is becoming an important aspect of many predictive applications. We introduce a penalized regression method which inherently implements personalization. Personalized angle (PAN) regression constructs regression coefficients that are specific to the covariate vector for which one is producing a prediction, thus personalizing the regression model itself. This is achieved by penalizing the normalized prediction for a given covariate vector. The method therefore penalizes the normalized regression coefficients, or the angles of the regression coefficients in a hyperspherical parametrization, introducing a new angle-based class of penalties. PAN hence combines two novel concepts: penalizing the normalized coefficients and personalization. For an orthogonal design matrix, we show that the PAN estimator is the solution to a low-dimensional eigenvector equation. Based on the hyperspherical parametrization, we construct an efficient algorithm to calculate the PAN estimator. We propose a parametric bootstrap procedure for selecting the tuning parameter, and simulations show that PAN regression can outperform ordinary least squares, ridge regression and other penalized regression methods in terms of prediction error. Finally, we demonstrate the method in a medical application.