结构弹塑性分析的新方法

利用样条有限点法及弹性应变与塑性应变的关系，提出了一个分析结构弹塑性问题的新方法。这个方法避开了非线性应力应变关系，计算简便。     

二自由度自谐式机器人动力学的研究

本文对引用弹性元件的二自由度谐式机器人的动力学进行了分析,在该模型中引入了负反馈系统。按预期的机构运动规律和系统的稳定性要求,研究了反馈放大系数的合理选择,并对构件单独和同时运动的仿真图线进行了分析。     

化学刺激引起相邻丽藻细胞的重复兴奋发放

给一丽藻细胞以化学刺激,经过一段延时,发现与之相邻的细胞的膜电位出现了自持重复兴奋发放.这一现象,可能是阳离子通过细胞节的扩散而引起的.     

点焊中的严格相似理论

本文对点焊过程中的相似理论进行了推导,并对其结果进行了分析和工艺试验。     

可用于累煤层露天矿山的多周期目标规划模型

本文给出了一个可应用于复合煤层露天矿短期生产计划优化的目标规划模型.模型考虑了与煤质、煤产量及开采程序合理性有关的亏损与盈利.该方法利用了带有客观地确定权重系数的目标规划加权法.文后又给出了一个能说明该模型应用于实际采矿问题的例子.     

Manufacturing''s Roel in Innovation Diffusion and Technological Substitution

Successful innovation management depends upon both, the intrinsic attributes of the new product to be marketed and the firm's internal performance like cost management, timely delivery and quality assurance. The impact of these latter aspects is frequently neglected in the design of models for supporting decision making in innovative firms.A model is outlined to study the market response of different manufacturing policies for innovative goods. It allows e.g. the evaluation of an aggressive strategy with large production capacities from the outset, or a more tentative behavior to. avoid the pressures stemming from high fixed cost and the risks of eventually idle capacity.     

Type I phosphatidylinositol kinase makes a novel inositol phospholipid, phosphatidylinositol-3-phosphate

The generation of second messengers from the hydrolysis of phosphatidylinositol-4,5-bisphosphate (PtdInsP2) by phosphoinositidase C has been implicated in the mediation of cellular responses to a variety of growth factors and oncogene products. The first step in the production of PtdInsP2 from phosphatidylinositol (PtdIns) is catalysed by PtdIns kinase. A PtdIns kinase activity has been found to associate specifically with several oncogene products, as well as with the platelet-derived growth factor (PDGF) receptor. We have previously identified two biochemically distinct PtdIns kinases in fibroblasts, and have found that only one of these, designated type I, specifically associates with activated tyrosine kinases. We have now characterized the site on the inositol ring phosphorylated by type I PtdIns kinase, and find that this kinase specifically phosphorylates the D-3 ring position to generate a novel phospholipid, phosphatidylinositol-3-phosphate (PtdIns(3)P). In contrast, the main PtdIns kinase in fibroblasts, designated type II, specifically phosphorylates the D-4 position to produce phosphatidylinositol-4-phosphate (PtdIns(4)P), previously considered to be the only form of PtdInsP. We have also tentatively identified PtdIns(3)P as a minor component of total PtdInsP in intact fibroblasts. We propose that type I PtdIns kinase is responsible for the generation of PtdIns(3)P in intact cells, and that this novel phosphoinositide could be important in the transduction of mitogenic and oncogenic signals.