分析电磁散射问题的MGFFT方法

采用多重网格法（ＭＧ）分析电大尺寸物体的电磁散射，这种ＭＧ方法与已有的几种多重矩量法有本质的不同，与其他多层方法相比，它是一种高效率的迭代方法。再利用积分方程的卷积特性引入ＦＦＴ方法快速计算迭代过程中矩阵与矢量的乘积，从而构成ＭＧＦＦＴ新算法，数值结果表明ＭＧＦＦＴ方法具有很高的计算效率，适用于电大尺寸问题的分析。     

唐代三教融合思潮对白居易思想的影响

儒、释、道三教融合,构成了唐代三教关系的最重要特点.在中唐诗人中,自居易的行为方式和生存智慧,真正体现了三教融合这一时代精神.在唐宋文化转型之际,自居易更以其独特的诗歌风格和人生思考,开种种风气之先.     

A tutorial on rank-based coefficient estimation for censored data in small- and large-scale problems

The analysis of survival endpoints subject to right-censoring is an important research area in statistics, particularly among econometricians and biostatisticians. The two most popular semiparametric models are the proportional hazards model and the accelerated failure time (AFT) model. Rank-based estimation in the AFT model is computationally challenging due to optimization of a non-smooth loss function. Previous work has shown that rank-based estimators may be written as solutions to linear programming (LP) problems. However, the size of the LP problem is O(n ²+p) subject to n ² linear constraints, where n denotes sample size and p denotes the dimension of parameters. As n and/or p increases, the feasibility of such solution in practice becomes questionable. Among data mining and statistical learning enthusiasts, there is interest in extending ordinary regression coefficient estimators for low-dimensions into high-dimensional data mining tools through regularization. Applying this recipe to rank-based coefficient estimators leads to formidable optimization problems which may be avoided through smooth approximations to non-smooth functions. We review smooth approximations and quasi-Newton methods for rank-based estimation in AFT models. The computational cost of our method is substantially smaller than the corresponding LP problem and can be applied to small- or large-scale problems similarly. The algorithm described here allows one to couple rank-based estimation for censored data with virtually any regularization and is exemplified through four case studies.     

应用数字仿真技术提高电液伺服课教学效果

针对电液伺服课内容抽象、理论推导多、不易理解,且学校实验经费紧张,无法实现物理实验的难点,应用数字仿真方法建立了能完成该课程相关试验内容的虚拟实验环境,同时该软件也可配合课堂教学,对所授内容进行直观演示.     

规制犯罪中单位立功问题研究

基于与自然人主体的平等性以及立功制度的立法目的,犯罪的单位也可成为刑法中立功的主体.单位立功的构成,要求单位责任人员为了单位利益,以单位名义,体现单位意志,并且具有单位立功的前提和能力.单位构成立功时,单位立功的效力和从宽处遇通常及于单位责任人员,单位责任人员单独构成个人立功时,并不会影响对单位处刑上的优待.     

当前中小型出口企业面临的困境及原因探析

 2007年以来，在国内外形势趋紧的背景下，我国出口增幅逐步回落，出口企业承受的压力明显加大，特别是中小型出口企业出口下降，亏损和经营困难企业增多。本文结合作者在深圳、东莞和中山三市的调研情况，对当前出口企业的困境做深入分析，力图客观、全面地把握出口企业情况。     

An Observational Study of Early Heterosexual Interaction at Middle School Dances

In this longitudinal, observational study of heterosexual interaction at middle school dances we examined the degree to which boys' and girls' groups became more gender integrated over time. The results show groups became more integrated over time with the pattern differing by gender. Boys had a relatively low level of contact with girls over the early months with an accelerated increase in the latter months. Girls had an increase in contact with boys over the early months but then a decrease in contact over the latter months. Further, changes in the dynamic covariate, aggression, were associated with changes in integration, and the static covariate, initial physical attractiveness, was predictive of integration trajectories. Physical attractiveness and aggression did relate to gender integration, but counter to our hypotheses, each strategy did not vary by gender, as predicted by sexual selection theory. Results are discussed in terms of different methods in assessing the roles of aggression and physical attractiveness in gender integration.     

关于旅游本义的思考——从海洋看人类旅游

人类生活有两个基本样态--定居和行走.在唯物史观看来,行走就是旅游的本义.行走过程中探索着未知的领域,其中包含着享乐和游戏,这种行走也就是旅游.享乐和游戏被凸现为旅游的主要含义,只是一段历史时期中的现象.如今,知识经济和全球化的发展,已使人类旅游重新展现出了行走的本义.     

浅议军事人力资本

军事人力资本的概念是一般人力资本在军事领域的运用 ,因此军事人力资本既具有一般人力资本的通性 ,又具有自身的特点。同是有关军事人力的概念 ;军事人力资本与军事人力资源有着较多区别。人是战争和军队建设的决定性因素 ,加强质量建军 ,夺取未来战争的胜利 ,关键在于加强军事人力资本投资