基于淘宝网C2C平台的大学生网上创业问题研究

随着就业压力的增加,鼓励大学生创业成为解决就业压力的重要举措之一。针对大学生网络创业属于粗放式经营、大学生创业非主流,试水性质比较多等现状,高校可以从努力营造支持创业的良好氛围;积极发挥课堂教学的作用,开设相关系列创业课程;打造创业教育师资队伍,逐步完善创业导师制度;鼓励有特长的学生通过先创业、后就业的途径加强对大学生网络创业教育。     

A SCORE TEST FOR SEASONAL FRACTIONAL INTEGRATION AND COINTEGRATION

This paper develops a time domain score statistic for testing fractional integration at zero and seasonal frequencies in quarterly time series models. Further, it introduces the notion of fractional cointegration at different frequencies between two seasonally integrated, I(1) series. In testing problems involving seasonal fractional cointegration, it is argued that the alternative hypothesis is one-sided for which the usual score test may not be appropriate. Therefore, based on ideas in Silvapulle and Silvapulle (1995), a one-sided score statistic is constructed. A simulation study finds that the score statistic generally has desirable size and power properties in moderately sized samples. The score test is applied to the quarterly Australian consumption function. The income and consumption series are found to be I(1) at zero and seasonal frequencies and these two series are not cointegrated at any frequency.     

A BAYESIAN INTERPRETATION OF MULTIPLE POINT ESTIMATES

Consider a large number of econometric investigations using different estimation techniques and/or different subsets of all available data to estimate a fixed set of parameters. The resulting empirical distribution of point estimates can be shown - under suitable conditions - to coincide with a Bayesian posterior measure on the parameter space induced by a minimum information procedure. This Bayesian interpretation makes it easier to combine the results of various empirical exercises for statistical decision making. The collection of estimators may be generated by one investigator to ensure the satisfaction of our conditions, or they may be collected from published works, where behavioral assumptions need to be made regarding the dependence structure of econometric studies.     

THE POWER AND SIZE OF NONPARAMETRIC TESTS FOR COMMON DISTRIBUTIONAL CHARACTERISTICS

This paper considers the power and size properties of some well known nonparametric linear rank tests for location and scale as well as the Kolmogorov-Smirnov omnibus test and proposed alternatives to it. Independence between some classes of linear rank tests is established facilitating their joint application. Monte Carlo study confirms the asymptotic power properties of the linear rank tests but raises concerns about their application in more general and practically relevant circumstances. It also indicates that the new omnibus tests constitute viable alternatives with superior properties to the Kolmogorov-Smirnov test in certain circumstances.     

I~2C总线与PC机接口设计

介绍一种简单、成本低的 I2 C总线与 PC机的接口卡 ,普通微机便可以与 I2 C系列的外接设备数据传输 ,构成一个工业自动化生产过程的监控系统     

On convergence of properly weighted samples to the target distribution

We consider importance sampling as well as other properly weighted samples with respect to a target distribution π$\pi$ from a different point of view. By considering the associated weights as sojourn times until the next jump, we define appropriate jump processes. When the original sample sequence forms an ergodic Markov chain, the associated jump process is an ergodic semi-Markov process with stationary distribution π$\pi$. In this respect, properly weighted samples behave very similarly to standard Markov chain Monte Carlo (MCMC) schemes in that they exhibit convergence to the target distribution as well. Indeed, some standard MCMC procedures like the Metropolis–Hastings algorithm are included in this context. Moreover, when the samples are independent and the mean weight is bounded above, we describe a slight modification in order to achieve exact (weighted) samples from the target distribution.     

A note on the queue with a random set-up time under a restricted admissibility policy with a Bernoulli vacation schedule

This paper deals with the queue size distribution of an M^x/G/1 queue with a random set-up time and with a Bernoulli vacation schedule under a restricted admissibility policy. This generalizes the model studied by Madan and Choudhury [Sankhyá 66 (2004) 175–193].     

唐代日本留学生井真成墓志铭初释

20 0 4年 ,一方唐代日本留学生的墓志惊现于古都西安 ,引起了中日专家学者的深切关注。由于墓志的记载极为简单 ,且日本文献中未有相关记载 ,目前对墓主井真成的身世及留学的生涯的论争非常激烈 ,成为 2 0 0 4年日本唐代史研究会的主要议题之一。目前 ,对最基本的墓志铭的释读存在很大争议。一些媒体报道少录了“志文”两字 ,并把楷体的志盖铭文释为篆体。关于墓志石的大小、汉字的判读也不一致。此外 ,就墓志铭所缺处的候补文字 ,虽有各种意见 ,但“衔”、“立”、“壑”、“哀”、“给”等的可能性较大。     

中国古代分封制与郡县制之争

由于中国古代社会君主专制的中央集权政权不断巩固与发展,自秦汉以来郡县制一直占主导地位,而分封制也以与西周不同的形式长期延续存在.分封制与郡县制都是君主专制政体下中央和地方关系的体现形式,二者的长期争论反映了中央集权与地方分权的斗争.     

当前广西边贸的问题与发展对策

文章针对今年3月以来广西边贸出现的大滑坡现象,对广西边贸的现状进行了调查与分析,探讨了凭祥市的“南山模式”是否应当否定、小额贸易与边民互市贸易之间的界定是否已经明确、边民每人每天带进的3000元以下的商品是否只能从口岸带进等问题,并提出了解决问题的8点有建设性的建议。