Intention to emigrate in transition countries: the case of Albania

We analyse the profile of potential emigrants from Albania using data from the Central and Eastern Europe Eurobarometer in 1992. Respondents were asked to rate on a four-point scale the likelihood that they would go to live in Western Europe. Our results show that intention to emigrate is correlated positively with males, education and certain occupations, and negatively with age. There is little relation between emigration and income. Those who support the introduction of a free market in Albania are also more likely to emigrate than those who do not. Received: 24 August 1998/Accepted: 17 April 2000     

A two phases queueing system with Bernoulli vacation schedule under multiple vacation policy

This paper deals with a single server Poisson arrival queue with two phases of heterogeneous service along with a Bernoulli schedule vacation model, where after two successive phases service the server either goes for a vacation with probability p (0≤p≤1) or may continue to serve the next unit, if any, with probability q(=1−p). Further the concept of multiple vacation policy is also introduced here. We obtained the queue size distributions at a departure epoch and at a random epoch, Laplace Stieltjes Transform of the waiting time distribution and busy period distribution along with some mean performance measures. Finally we discuss some statistical inference related issues.     

Identifying the most successful dose (MSD) in dose-finding studies in cancer

For a dose finding study in cancer, the most successful dose (MSD), among a group of available doses, is that dose at which the overall success rate is the highest. This rate is the product of the rate of seeing non-toxicities together with the rate of tumor response. A successful dose finding trial in this context is one where we manage to identify the MSD in an efficient manner. In practice we may also need to consider algorithms for identifying the MSD which can incorporate certain restrictions, the most common restriction maintaining the estimated toxicity rate alone below some maximum rate. In this case the MSD may correspond to a different level than that for the unconstrained MSD and, in providing a final recommendation, it is important to underline that it is subject to the given constraint. We work with the approach described in O'Quigley et al. [Biometrics 2001; 57(4):1018-1029]. The focus of that work was dose finding in HIV where both information on toxicity and efficacy were almost immediately available. Recent cancer studies are beginning to fall under this same heading where, as before, toxicity can be quickly evaluated and, in addition, we can rely on biological markers or other measures of tumor response. Mindful of the particular context of cancer, our purpose here is to consider the methodology developed by O'Quigley et al. and its practical implementation. We also carry out a study on the doubly under-parameterized model, developed by O'Quigley et al. but not     

数字电视视频压缩标准

简述MPEG、JPEG与H系列图像压缩编码国际标准中与高清晰度数字电视视频相关的编码技术,并指出各自的特点、性能与应用。     

多元·创新·现实主义--20世纪美国文学综述

20世纪美国文学取得了举世瞩目的成就.其主要有以下几个特点文学流派繁多,异彩纷呈;戏剧、诗歌、小说各领风骚,现实主义小说成就最高;文学批评表现出独立性、多元性和科学性;文学创作者具有反传统性与创新性.这些特点使美国文学充满了生机和活力,并对世界其他国家的文学发展产生了越来越大的影响.     

中国学术刊物的发展与学术为本

中国的人文社会科学刊物应当在建构中国学术传统和实质性地推进中国学术发展方面发挥重要作用。它应最大化地支配中国人文社会科学的发展和方向,亦应在学术生产和学术传统的建构方面不遗余力。但受各种因素的影响,中国人文社会科学学术刊物在一定意义上丧失了其作为研究者个人学术研究的知识参照作用和引领中国人文社会科学发展的实质性作用,其根本问题在于整个学术界还没有充分意识到学术论文以及刊载这些论文的学术刊物所具有的知识意义。因此,中国学术刊物应建构和加强明确的学术自主性和学术责任感,能够在学术刊物和学术发展之间明确定位,以期推动中国未来学术传统和学术发展走向。     

先秦汉语的“是”字主语句

先秦汉语“是”字主语句中有一类较特殊的次类——“NP,是＋P”,其中的指代词“是”在语义上回指其前的名词性成份NP,这是汉语判断句系词“是”产生的重要句法环境。不过,该句式在先秦汉语中并不多见：通过对六部先秦典籍的考察,只有13例“NP,是＋P”可以认为是较典型的用例,而这13例“是”字主语句仍然说明了指代词“是”的回指用法逐渐弱化,由一个可有可无的语用成份,最终发展为系词的历史过程。这一过程是指代词“是”和“NP,是＋P”句式在语义机制和句法机制相互作用下完成的,类似的语言变化现象在汉语史中具有代表性。     

《论衡》的文学思想探析

《论衡》是一部具有文学性的政论散文著作,探析其文学思想对于我们理解《论衡》的文章写作意义极大。《论衡》的文学思想是在王充朴素的科学精神,即"疾虚妄"式的批判、"求真美"的价值取向下形成的,突出表现为"为世用""求真美"的特点,并由此派生出王充的文章观。     

城市公共交通出行者交通信息选择行为研究

先进的交通信息服务系统建设是我国城市交通可持续发展的必由之路。文章基于大连市公共交通出行信息需求专项调查,通过多维度频率分布研究,对不同个人属性、信息服务特征等条件下公共交通出行者的交通信息内容需求进行分析,进一步建立公共交通出行者交通信息选择binary logistic模型,对公共交通出行者交通信息选择行为进行研究。研究显示,公共交通出行者交通信息内容需求因个人属性、信息服务特征等因素存在较大差别,交通信息内容对公共交通出行者交通信息选择行为存在不同程度的影响。最后,文章基于实证研究结果,提出面向城市公共交通出行者的交通信息服务系统规范化建设的相关策略。     

沃勒斯坦与布罗代尔视野中的资本主义

世界体系理论主要代表人物沃勒斯坦与年鉴学派第二代宗师布罗代尔对资本主义有许多共识 ,都将资本主义置于世界范围去考察 ,并对资本的含义、资本主义的产生和发展进行了论述。本文力图透过他们的视野介绍他们对资本主义的认识