弹簧夹连续模设计

介绍了以自动送料与重力送料相结合传递工件和利用工件形状尺寸巧妙定位的连续模设计方法。     

An interactive simulation model of urban ecosystem and its implementation

An interactive simulation model is established based on the methodology of "sensitivity model" (SM) during the cooperative research process between the founders of SM and the authors. And the conceptual framework of SM is developed into the interactively qualitative and quantitative simulation model presented in this paper, which makes it possible to break down a complex urban ecosystem into simple and visual quantitative or qualitative relationships between the factors. By studying the dynamic responses of the system to the changes of the inputs and parameters of the model, future trends in urban development can be predicted and strategies formulated. The whole process is realized on micro-computer in the course of man-computer interaction. Its potential use is shown in a case of Tianjin City.     

农业开发与农业生态环境的保护和建设

本文分析了农业开发中存在的四个主要环境生态问题,及其对农业生产的严重制约,提出了当前农业综合开发过程中生态环境治理、保护和建设的6项基本对策。     

安全分析和评价方法论

本文对系统安全分析和评价方法进行了讨论。对它们的特点作了介绍和比较。同时给出了选用方法的要点.     

硬铝合金薄壁杯形件成形工艺与模具

此文介绍了硬铝合金薄壁杯形件成形工艺与模具设计的方法,分析了硬铝合金塑性差给冷挤压成形带来了困难的特点,从成形工艺、模具设计等方面采取了有效措施,从而较好地解决了硬铝合金在成形过程中产生的缺陷.此文也为类似零件艺及模具设计提供了参考.     

Role of interaction between selenium and organic matters on causes of Kaschin-Beck disease

Influences of organic matters of soil and water on speciation and biological utilization of selenium are discussed. Humic acid is found to be the main pool of selenium in soil and affects the bio-availability of the element in soil-plant system. Fulvic acid from drinking water inhibits the absorption of selenium taken from diet. The relationship between high content of organic matters of water and selenium deficiency on the causes of KBD could be reflected in the limited synthesis of glutathione peroxidase, which is generally stimulated by fulvic acid from drinking water.     

超塑性材料轴对称镦粗时的变形力计算

本文探讨了变分理论在超塑性成形方面的应用,建立了适合超塑性材料的变分理论的基本方程,并比超塑性材料轴对称镦粗为例验证了这些方程的正确性。     

Spatial and temporal distribution of total ozone over China

１　ＩｎｔｒｏｄｕｃｔｉｏｎＯｚｏｎｅｉｓｏｎｅｏｆｔｈｅｔｒａｃｅｇａｓｅｓｉｎａｔｍｏｓｐｈｅｒｅ．Ｉｔｃａｎａｂｓｏｒｂｎｅａｒｌｙａｌｌｓｏｌａｒｕｌｔｒａｖｉｏｌｅｔｒａｄｉａｔｉｏｎ（ＵＶＢ）ｒａｎｇｅｄｆｒｏｍ０－２０—０－３５μｍ．Ｔｈｅｃｈａｎｇｅｏｆｓｔｒａｔｏｓｐｈｅｒｉｃｏｚｏｎｅｃｏｎｃｅｎｔｒａｔｉｏｎａｎｄｉｔｓｖｅｒｔｉｃａｌｓｔｒｕｃｔｕｒｅｗｉｌｌｉｎｆｌｕｅｎｃｅｔｈｅｔｅｍｐｅｒａｔｕｒｅｓｔｒｕｃｔｕｒｅｏｆｓｔｒａｔｏｓｐｈｅｒｅ．Ｔｈｅｄｅｃｒｅａ…     

福建龙岩中甲锡多金属矿床构造控矿特征

中甲锡多金属矿床是受政和一大埔断裂带的低序级构造所控制的矿床。控矿构造研究表明，锡矿化及矿体主要受NE－NNE、NW向断裂、裂隙以及接触带构造的复合控制，构造变形以服性—脆韧性为主，构造控矿型式多样并决定矿（化）体的空间定位方式，形成高中温热液型、破碎蚀变岩型、斑宕型锡多金属矿床，成为中甲锡多金属矿床的重要成矿地质条件之一。     

利用塑性介质挤胀成形三通管接头变形力的研究

此文对利用塑性介质挤胀成形三通管接头变形力进行了实验研究。设计了一套挤胀成形三通管接头的通用装置,并利用此装置进行了三通挤胀成形实验。此研究给出了影响成形过程的一些重要参数。将理论结果与实验结果进行了对比,两者吻合较好。