欧洲门户鹿特丹

作为鹿特丹市市长，我非常荣幸有机会能向中国读者介绍我们这座城市。因为中国和鹿特丹之间的关系非常密切。鹿特丹三十余年来一直雄居世界第一大港，同时它又是荷兰的工业中心。目前全市人口超过一百万。鹿特丹港的年货物吞吐量约在3亿吨左右。面对日益发展的欧洲其它港口的竞争，为了维护世界第一大港的地位，鹿特丹市已将改善港口的服务质量提上议事日程。这也正是促成鹿特丹港从原来单一的转口贸易港发展成为一个集国际贸易、工业和货物集散中心为一体的大港，其设施和服务也从进出口、转口贸易扩展到所有的服务领域的原因所在。我们的…     

大碗茶“倒出”百万金

下岗夫妇无奈卖起大碗茶 张勇和王欣是杭州市郊区青云镇上一家铸钢厂的工人。1994年春天，夫妻俩双双下岗。两人很快又找到了工作，张勇在一个建筑工地当泥瓦工，王欣做起了家政工作。     

争大棚与毁大棚的启示

去年年初，某乡发现反季节蔬菜在市场上日益走俏，种植效益是常规蔬菜的好多倍，便把群众分批带到山东寿光参观学习，并高薪聘请寿光技术人员前来举办培训班，指导农民种植。结果，不到一年时间，全乡日光温室发展到150多幢，每幢年收入达8000多元。前不久，乡里集中投资建设的     

企业生存发展之道——来自动物实验的启示

羚羊和狼的故事的启示:要感激对手,因敌制胜一位动物研究学家在考察生活于非洲奥兰洽河两岸的动物时,注意到河东岸和河西岸的羚羊大不一样,前者繁殖能力比后者更强,而且奔跑速度每分钟要快15米。他感到十分奇怪,既然环境和食物都相同,差别何以如此之大?为了能解开其中之谜,动物学家和当地动物保护协会进行了一项实验:在河两岸分别捉10只羚羊送到对岸生活。结果送到西岸的羚羊繁殖到了15只,而送到东岸的羚羊只剩下4只,另外6只被狼吃掉了。谜底终于被揭开,原来东岸的羚羊之所以身体强健,是因它们附近居住着一个狼群,这使羚羊天天处在一个“竞…     

A child health production function estimated from longitudinal data. Cebu Study Team

Collaborating researchers used a multi equation model to analyze 3080 mother-infant pairs living on the island of Cebu in the central Philippines and to estimate a child health production function. The econometric methods used eliminated obstacles such as heterogeneity and endogeneity of significant explanatory factors. They also maximized the longitudinal quality of the data. The results showed that morbidity in 1 period reduced infant weight in following periods. For example, diarrhea and febrile respiratory infection reduced growth in the time period following the illnesses. Further effects of some contributing factors were great near birth not diminished with age. For example, breast feeding promoted growth and protected against infection, especially diarrhea and febrile respiratory infection, more substantially near birth than it did later. Further, in urban areas, preventive health care positively affected growth independently of its indirect influence on reducing respiratory infection. Yet it had little effect on diarrhea. Diarrhea had a strong adverse effect on growth. Exposure of the infant to enteric pathogens had the greatest influence on production of diarrhea. In urban areas, exposure included water supply contamination, exposure to feces, a more pathogenic diet, and community crowding. In rural areas, however, exposure included community crowding and increased rainfall which presumably washed feces into the water supply. Household crowding in both urban and rural areas and irritation from smoke in urban areas only tended to bring about febrile respiratory infection.     

1989年我刊被美国《化学文摘》系统收录

1990年12月23日,我刊收到中国科学技术情报研究所的来函,信函说:“1989年,贵刊被国外〈CA〉系统收录,特表祝贺。”〈CA〉是美国《化学文摘》的简称,全名为 Chemical Abstracts。创刊于1907年,至今已达83年的历史,它是目前世界上化学化工领域最大的情报探索工具,现由美国化学会化学文摘服务社(Chemical Abstracts Service of fhe American