在绝望处寻找希望--论瓦尔特·本雅明的艺术发展观

瓦尔特·本雅明指出,由史诗分裂形成的三种文体———故事、小说、新闻消息等随着时代变迁,在艺术场的位置发生相应的变化。传统艺术灵韵消失,机械复制时代的电影等新艺术形式展示了全新的艺术功能。在《小说的危机》《讲故事的人》和《机械复制时代的艺术》等篇章中,本雅明深入探讨了从故事、小说到新闻、电影的艺术链条上展示出来的艺术形式演变以及艺术和技术的关系,进而提出了他的艺术发展观,即一时代必然有一时代之艺术。他强调,技术进步影响并改变了各种艺术形式、接受方式及其功能,现代技术在艺术变革中的潜能因而是绝对不可忽视的。     

An online copy number variant detection method for short sequencing reads

The availability of the next generation sequencing (NGS) technology in today's biomedical research has provided new opportunities in scientific discovery of genetic information. The high-throughput NGS technology, especially DNA-seq, is particularly useful in profiling a genome for the analysis of DNA copy number variants (CNVs). The read count (RC) data resulting from NGS technology are massive and information rich. How to exploit the RC data for accurate CNV detection has become a computational and statistical challenge. We provide a statistical online change point method to help detect CNVs in the sequencing RC data in this paper. This method uses the idea of online searching for change point (or breakpoint) with a Markov chain assumption on the breakpoints loci and an iterative computing process via a Bayesian framework. We illustrate that an online change-point detection method is particularly suitable for identifying CNVs in the RC data. The algorithm is applied to the publicly available NCI-H2347 lung cancer cell line sequencing reads data for locating the breakpoints. Extensive simulation studies have been carried out and results show the good behavior of the proposed algorithm. The algorithm is implemented in R and the codes are available upon request.     

关于代数体函数的增长与其例外函数个数的关系

设f（z）为n值代数体函数，如果f（z）具有n＋1个Borel例外函数，则f（z）是正规增长的，其级为正整数或无穷。如果f（z）的级ρ（0＜ρ＜∞）不为整数，记P为f（z）的Borel例外函数个数，q为f（z）的亏量等于1的Nevanlinna例外值个数，则P＋q≤n．     

对节约型社会的政治经济学解读

当代中国节约型社会理念的提出,缘起于支撑经济增长的资源匮乏与环境退化。如果只从这一角度理解节约问题和构建节约型社会,那么,不仅在理论上是片面的,在实践上也会对节约型社会的建立形成限制。节约在社会再生产过程中具有生产、消费与人的全面发展效应。节约型社会的实质是人、社会经济关系与自然三个层次发展目标的高度和谐与统一,它部分体现了革命导师马克思、恩格斯对未来社会的伟大构想。     

从科学发展观的角度探析马克思社会再生产理论

科学发展观强调了经济和社会要和谐发展。马克思的社会再生产理论要体现科学的发展观,必须在经济系统和环境系统相统一、经济资源价值和环境资源价值相统一以及经济系统再生产和环境系统再生产相统一的前提下深化和发展。     

On a Pandemic Threshold Theorem of the Early Kermack–McKendrick Model with Individual Heterogeneity

A pandemic threshold theorem of the Kermack–McKendrick epidemic system with individual heterogeneity is proved from the definition of R ₀ by Diekmann, Heesterbeek, and Metz. The early Kermack–McKendrick epidemic model is extended to recognize individual heterogeneity, where the state variable indicates an epidemiological state or genetic, physiological, or behavioral characteristics such as risk of infection. With the basic reproduction number R ₀ for the heterogeneous population, the final size equation of the limit epidemic starting from a completely susceptible steady state at t = ?∞ has a unique positive solution if and only if R ₀  > 1. The main result is that the positive solution of the final size equation gives the lower bound of the intensity of any epidemic starting from a host population composed of susceptible and a few infected individuals who spread on a noncompact domain of the trait variable.     

中华书局版《元稹集》存在的八个主要问题略说

中华书局 1982年出版的冀勤点校的《元稹集》 ,是 2 0世纪惟一的点校本 ,但是这个点校本却存在较多的不足之处 :一是录校不精 ,二是误校太多 ,三是失校太多 ,四是对前人成果的借鉴不够合理、充分 ,五是轻率校改 ,六是误收与误补 ,七是标点失误 ,八是未能广参异本。为此我们对《元稹集》应有一个基本正确的认识 ,以便日后谨慎正确的利用 ,并藉此为以后重新整理《元稹集》获得些微的经验教训     

量词插入与汉英数量表述

名词可以分为两类:带有[+个体]特征的名词和带有[-个体]特征的名词.定量数词只能直接加在带有[+个体]特征的名词前面来计数.为了挽救定量数词的这一局限性,汉语和英语都选择了“量词插入”这一手段,但在汉语中“量词插入”属于词汇手段,即用附加手段将“量词”作为语素创造出一种新的双音节词汇；而在英语中“量词插入”则是句法手段,它必须满足“格检验式”这一句法规则.     

Estimating the number of clusters

Hartigan (1975) defines the number q of clusters in a d ‐variate statistical population as the number of connected components of the set {f > c}, where f denotes the underlying density function on R^d and c is a given constant. Some usual cluster algorithms treat q as an input which must be given in advance. The authors propose a method for estimating this parameter which is based on the computation of the number of connected components of an estimate of {f > c}. This set estimator is constructed as a union of balls with centres at an appropriate subsample which is selected via a nonparametric density estimator of f. The asymptotic behaviour of the proposed method is analyzed. A simulation study and an example with real data are also included.