“分配不公”的社会学解读

当前在我国普遍存在的“分配不公”现象 ,有使社会向恶性运行和畸形发展方向退化的趋势。针对“分配不公”产生的原因 ,必须从政治理念、制度重建、政策调整、文化重建等多方面入手 ,解决“分配不公”问题 ,实现社会良性运行和协调发展     

An efficient polynomial space and polynomial delay algorithm for enumeration of maximal motifs in a sequence

In this paper, we consider the problem of enumerating all maximal motifs in an input string for the class of repeated motifs with wild cards. A maximal motif is such a representative motif that is not properly contained in any larger motifs with the same location lists. Although the enumeration problem for maximal motifs with wild cards has been studied in Parida et al. (2001), Pisanti et al. (2003) and Pelfrêne et al. (2003), its output-polynomial time computability has been still open. The main result of this paper is a polynomial space polynomial delay algorithm for the maximal motif enumeration problem for the repeated motifs with wild cards. This algorithm enumerates all maximal motifs in an input string of length n in O(n ³) time per motif with O(n) space, in particular O(n ³) delay. The key of the algorithm is depth-first search on a tree-shaped search route over all maximal motifs based on a technique called prefix-preserving closure extension. We also show an exponential lower bound and a succinctness result on the number of maximal motifs, which indicate the limit of a straightforward approach. The results of the computational experiments show that our algorithm can be applicable to huge string data such as genome data in practice, and does not take large additional computational cost compared to usual frequent motif mining algorithms. This work is done during the Hiroki Arimura’s visit in LIRIS, University Claude-Bernard Lyon 1, France.     

应用白纸测图技术测绘大比例尺草地群落分布图的探讨

在牧区生产方面 ,大比例尺草地植被分布图是非常重要的基础资料 ,对于划区轮牧、草场轮刈以及草地权属落实等都是最基础的档案 ,然而大比例尺植被图 ( 1:50 0 0 )的测绘却很少有人探讨 ,本文从生产发展需要出发 ,试用测绘学方法白纸测图技术 ,进行 1:50 0 0植物群落分布图的测绘研究 ,此方法可以概括为草群分类、样地选择、界线勾绘、建立控制网、样地扩展、分板实测、联绘成图等步骤     

算子的型与指标选择

本文定义了弱*(p,q)型算子,并且通过对强(p,q)型算子指标选择结论的推广,得到了弱(p,q)型算子以及弱*(p,q)型算子指标选择的结论。     

从社区居民读书状况看社区图书馆的建设模式

南昌居民读书特点为：家庭藏书不能满足居民的读书需求；读书的主观能动性不足，属于“要用才读书”；在读书方面投入的时间和资金不大。因此，社区图书馆在社区将有着极大的功能发挥空间。社区图书馆的建设必须与时俱进，采用依靠政府支持、创办图书银行、挖掘物业潜力、共享学校与公共图书馆的资源等多元化模式进行建设。     

应用型大学《大学计算机基础》课程教学模式探讨

介绍了《大学计算机基础》课程的基本教学要求和大学新生信息技术基础的差异性,提出在应用型大学内根据国家计算机等级考试大纲逐步引入该课程的教学内容,并充分建设合适的网络平台,帮助学生自学该课程的理论内容。     

优化进出口商品结构转变外贸增长方式

近时期我国外贸工作的重点是,加快转变外贸增长方式,优化进出口商品结构,鼓励高新技术产品和机电产品出口,继续限制资源性、高耗能、高污染产品出口,提高利用外资质量,促进国内产业升级.我国贸易增长方式的转变关键在于国内产业结构的转变,而产业结构的转变是一个比较长期的过程.要优化进出口商品结构,着力提高对外贸易的质量和效益.     

`Sex-Equal' Stable Matchings

The paper defines a measure on the set of stable matchings in the marriage problem. This measure is based on the minimization of the envy difference between the sets of men and women, while preserving stability and selects stable matchings with the least conflict of interest between both groups of agents. The solution concept proposed is called Sex-equal Matching (SEM) and the paper also provides an algorithm to compute the set of SEM.     

Conditional interval estimation of the mean following rejection of a two sided test

The effect of rejecting a two-sided preliminary test of significance for the mean of a normal distribution upon subsequent interval estimation of the mean is examined. For the case where the variance is known, conditional confidence intervals may be shorter than unconditional intervals, in contrast to the one-sided preliminary test case examined by Meeks and D’Agostino (1983, The American Statistician, 7, 134-136) . For the case where the variance is unknown and must be estimated by the sample variance, it is shown that customary intervals do not offer uniformly greater or lesser coverage than the nominal level.     

Serial dependence and regression of Poisson INARMA models

Time series of counts occur in many fields of practice, with the Poisson distribution as a popular choice for the marginal process distribution. A great variety of serial dependence structures of stationary count processes can be modelled by the INARMA family. In this article, we propose a new approach to the INMA(q) family in general, including previously known results as special cases. In the particular case of Poisson marginals, we will derive new results concerning regression properties and the serial dependence structure of INAR(1) and INMA(q) models. Finally, we present explicit expressions for the distribution of jumps in such processes.