“数字鸿沟”：当代社会阶层分析的新视角*

当代社会，随着信息技术的发展以及信息重要性的增强，以互联网等为基础的电子信息网络已经浸透于社会的各个领域之中，在产业、经济和社会中生成着一种新的信息场域，影响着人们的社会生活。本文从社会阶层的研究视角出发，透过“现代——后现代”的二维分析模式对信息及信息技术带来的“数字鸿沟”现象进行理论上的阐释，对其究竟是实现着“阶层化”还是“去阶层化”进行探讨，并对信息化高度发达的日本社会进行了“数字鸿沟”的实证分析。可以看出：信息、信息技术已经成为一种新的变量，并与社会阶层之间产生着密切的关系，重塑着社会阶层化机制。     

振兴辽宁交通先行

交通运输是重要的基础产业,是辽宁振兴的先导和保障。“十五”期间,辽宁省委、省政府对高速公路建设给予了高度重视,省委书记李克强指出:交通运输是重要的基础性和先导性产业。实现辽宁全面振兴,必须发挥交通事业的关键作用。城市交通体系四通八达“十五”期间,辽宁省新增城市道路面积2263万平方米;新增公交车辆7317标台;在城市人口增长的情况下,万人拥有公交车辆9标台,比“九五”期末增加0.55标台。而对于越来越多的人来说,拥有一辆自己的汽车成了越来越迫切的愿望。随着经济的发展,5年间辽宁省全年城镇居民人均可支配收入已由5357.8元提高…     

Maternity and child health care in urban China

In China the effort to develop maternal and child health (MCH) care has been ongoing. Initially, attention was directed primarily to promulgating a modern method of delivery in an effort neonatal tetanus and puerperal fever. The next stage was the systematic management of MCH care. Pregnant women and puerperants were given a series of checkups and guidance from conception until the 42nd day after delivery. The purpose was to prevent and treat complications. In some cities, perinatal care has developed to the point of health care management of the health of both mother and child. This extensive health care system includes preconception and pregnancy care, puerperant care, and neonatal care. Premarital checks have become the rule in the urban areas. MCH care organizations at the grassroots level and community health workers take responsibility for advising newly married couples about health care. In addition, some medical colleges and their affiliated hospitals provide consultation services for these couples. The Shanghai Railway Medical College uses a computer to make projections on multigenic genetic diseases. It provides information on incidence risk of the next generation to help couples make their childbearing decisions. The majority of pregnant women get their 1st prenatal check prior to the 12th week of pregnancy, followed by 9 re-examinations to screen out high risk factors. Difficult labor, infections, obstetric trauma, postpartum hemorrhage, and fetal distress are prevented at childbirth. Newborns are scored with Apgar comments; those with low marks are specially protected. In some cities, an investigation system has been established to deal with perinatal deaths. Perinatal care is managed at 3 levels: community MCH centers and MCH departments of hospitals, clinics, and industrial enterprises form the 1st level of care; MCH centers of city districts and hospitals at the district level make up the 2nd level of care; and MCH institutes or hospitals at provincial or city levels, hospitals attached to medical colleges, and hospitals under government ministries form the 3rd level of care.     

高Si/C高强度铸铁中C、Si、Si/C的作用及其选择

本文叙述了高Si/C高强度灰铸铁中碳、硅元素存在的形式及其对结晶过程的影响。试验表明,当碳当量一定时,随着Si/C的升高,初生奥氏体枝晶数量增多并且细化和强化,从而构成了强度的基础。该铸铁的强度模式应为“初生奥氏+共晶团”。本文对E型石墨存在的必然性和合理性也进行了讨论。     

脉冲光源光函数的测试方法研究

本文主要探讨了脉冲光源光函数的测试方法,着重介绍了利用频谱分析仪,采用比对法测试闪光型救生衣灯光函数的过程．     

A cultural economy perspective on service sector migration in the global city: the case of Hong Kong

This article argues that in order to fully understand the geography of labour migration to global cities, it is necessary to consider economic forces in conjunction with mediating socio-cultural influences. Support for this argument is based on an examination of the pattern of migration to Hong Kong, a city which plays a significant role in the world economy.
Reported here are the results of an analysis of recently released 1996 by-census data, and the authors' interviews with foreign domestic workers in Hong Kong. These findings have shown that highly skilled immigrant workers were drawn largely from developed countries, the main sources of inward investment in this city, while less skilled immigrants were drawn from less developed neighbouring labour markets.
While the geographical pattern of immigration followed broadly that predicted from Hong Kong's position in the world economy, the results have revealed that cultural influences such as language and social networks are also important in shaping the economic roles of migrant workers.     

战术移动通信网的频率复用技术研究

战术移动通信网的网络拓扑结构随战场环境的变化而变化,为此网络拓扑结构具有重组的能力,网络拓扑重组后必须进行链路频道的重新分配,文中提出的频道分配技术是在避免同频道干扰条件下任一频道可在全网内多次重复使用,以提高频道的重复利用率,同时分析了该情况下网络至少应拥有的频道数,以保证网络有足够的频道供分配。     

中国西部开发与美国西部开发的对比研究

通过对美国西部开发和中国西部开发的对比及借鉴美国西部的经济开发策略,对中国西部的经济发展提出了采取“梯度转移”与有条件的“增长极核发展”相结合的经济发展战略模式的建议。     

中药“保健增乳乐”对围产期奶牛血液生化指标的影响

试验选用30头干奶牛随机分成试验Ⅰ组、Ⅱ组及对照组(Ⅲ),观察中药“保健增乳乐”对围产期奶牛血液生化指标的影响。在此基础上,异地选择10头干奶牛随机分成试验组(Ⅰ)和对照组(Ⅱ)进行了重复试验。结果显示:中药“保健增乳乐”能显著地降低产后奶牛血清谷草转氨酶(SGOT)、血清γ—谷氨酰转肽酶(Sγ—GT)、血清碱性磷酸酶(SALP)的活性(P<0.05),血清酮体含量(KB)、血清甘油三酯(TG)含量显著减少(P<0.01)。血糖(G)含量升高(P<0.05)。血清钙、无机磷的含量维持正常水平。结果显示中药“保健增乳乐”能有效地改善围产期奶牛的肝脏功能,维持奶牛的正常代谢,预防奶牛围产期的营养代谢性疾病。     

Stability of voting games

This paper generalizes the result of Le Breton and Salles (1990) about stable set (far-sighted core of order 1) for voting games to far-sighted core of arbitrary order. Let m be the number of alternatives, n be the number of voters and G(n,k) be a proper symmetric simple game in which the size of a winning coalition is greater or equal to k. It is shown that the far-sighted core of order d for G(n,k) is nonempty for all preference profiles and for all n and k with n/(n–k)=v ¹ iff m(d+1)(v–1).This paper is part of my dissertation. I am grateful to my thesis advisor Leonid Hurwicz for his guidance and encouragement. I would like to thank Edward Green, Lu Hong, James Jordan, Andrew McLennan, Herve Moulin and Marcel Richter for their very helpful suggestions. Especially a referee and Maurice Salles made many good comments. Of course, any errors that remain are the sole responsibility of the author.