中国物流上市公司的债务融资与市场价值研究

分析发现物流企业的债务融资率的提高对企业市场价值的增加具有积极的促进作用。同时,债务融资对企业下一年的业绩具有积极的作用,这主要得益于物流企业的整体资产回报率高于借款的成本,从而使企业的股东得到收益,也促进企业价值的提升。     

Toeplitz矩阵的性质及其应用

运用矩阵方法,研究了特殊的Toeplitz矩阵A和n阶幂零矩阵在相似变换下的广义逆,得到了Toeplitz矩阵的一些性质,并用这些性质刻画了幂零矩阵A在相似变换下的广义逆的表达形式.     

中英文医学科研论文摘要的比较研究

目的：探讨和对比中英文医学科研论文摘要部分所存在的差异。方法：通过自身写作及阅读大量的中英文参考文献,对比、分析其摘要的基本结构、基本内容和写作要求,比较中英文医学科研论文的基本结构、基本内容的描述及人称代词的使用等方面的内容。结果：中英文医学科研论文摘要部分在基本结构、基本内容的描述以及人称代词的使用方面存在很大的差异。结论：中英文医学科研论文的摘要部分写作要求不完全相同,提示作者在进行中英文医学科研论文写作时,应根据中英文期刊的具体要求进行有针对性的写作,以提高论文录用率。     

日本动画类型化思考——以机器人动画为例

本文从类型产生的根源出发,剖析日本机器人动画存在的基础与演变,同时分析其类型如何通过叠加变异形成更丰富的体系,满足大众文化的多种需求.     

加里·史密斯 沈阳变化太快了

<正>沈阳的发展太快了,记得在两年前刚到这里,看到的是很多拆迁的房屋,路边还有许多正在施工的吊车,可是短短的两年时间就让这里有了太多的改变,一座座崭新现代的建筑物纷纷拔地而起。沈阳,一座旧的城市正在发生着日新月异的变化。加里·史密斯(Gary Smith)感慨地向记者讲述着沈阳城市的变化。     

语法与四个世界关系之断想

用三一语言学的四个世界理论,从语言世界、物理世界、心理世界、文化世界的角度解释语法,可以帮助我们认识语法与四个世界的关系,从而更深刻地理解语法现象.这是语法研究的一个新途径.     

青藏高原多民族聚居区民族交往的调查研究——以青海省化隆县为例

化隆地区多元民族类型和多种宗教信仰决定了当地民族关系的历史复杂性;当地的多民族杂居特点是我国青藏高原地区民族杂居形态的一个缩影,将化隆县作为一个多民族聚居区民族交往的调查研究个案,有助于我们比较准确地把握青藏地区民族交往的特点与规律.     

网络、信息与统计

文章探讨在网络技术下,网络、信息与统计三者之间的关系,最终旨在阐述在信息经济时代,统计可能面对的一些挑战.     

Bayesian model comparison for compartmental models with applications in positron emission tomography

We develop strategies for Bayesian modelling as well as model comparison, averaging and selection for compartmental models with particular emphasis on those that occur in the analysis of positron emission tomography (PET) data. Both modelling and computational issues are considered. Biophysically inspired informative priors are developed for the problem at hand, and by comparison with default vague priors it is shown that the proposed modelling is not overly sensitive to prior specification. It is also shown that an additive normal error structure does not describe measured PET data well, despite being very widely used, and that within a simple Bayesian framework simultaneous parameter estimation and model comparison can be performed with a more general noise model. The proposed approach is compared with standard techniques using both simulated and real data. In addition to good, robust estimation performance, the proposed technique provides, automatically, a characterisation of the uncertainty in the resulting estimates which can be considerable in applications such as PET.     

Further results for parallel systems with two heterogeneous exponential components

In this paper, we investigate ordering properties of lifetimes of parallel systems with two independent heterogeneous exponential components with respect to likelihood ratio and hazard rate orders. Two sufficient conditions are provided for likelihood ratio and hazard rate orders to hold between the lifetimes of two parallel systems, respectively. Moreover, we extend the results from exponential case to the proportional hazard rate models. The results established here strength some of the results known in the literature. Finally, some numerical examples are given to illustrate the theoretical results derived here as well.