钢筋混凝土无柱帽式无梁楼盖板的弯曲分析

将整体双向钢筋混凝土无柱帽式无梁楼盖视为支承于等矩柱网上的正交各向异性板,依据ｋｉｒｃｈｈｏｆｆ薄板理论,利用变形的对称性,并借助Ｆｏｕｒｉｅｒ求解方法,给出了均布荷载作用下楼盖板弯曲挠度的解析解。本文解析解收敛很快,使用较为方便,对该类问题的工程设计有一定的参考价值。     

Thermal Deformation Measurement and Stress Analysis of PQFP Assembly during Power Cycling

ＴｈｅｒｍａｌＤｅｆｏｒｍａｔｉｏｎＭｅａｓｕｒｅｍｅｎｔａｎｄＳｔｒｅｓｓＡｎａｌｙｓｉｓｏｆＰＱＦＰＡｓｅｍｂｌｙｄｕｒｉｎｇＰｏｗｅｒＣｙｃｌｉｎｇＤａｉＦｕｌｏｎｇ（戴福隆）,ＳｈｉＬｉｎｇ（石玲）,ＷｅｎＸｉｕｍｅｉ（温秀梅）Ｄｅｐａｒｔｍ...     

固支各向同性圆板的横向剪切影响

应用８节点厚板等参元分析了受均布载荷的固支各向同性厚圆板和薄圆板的弯曲,重点分析了横向剪切影响。     

复合采动影响下地表变形预测与危险区划分方法

矿山岩体工程开挖将改变原岩应力状态,由此引起岩体本身及周围一定区域的移动和变形,地下与露天复合开采的矿山更是如此,其变形速率之大、范围之广、时间之长已严重地影响周边环境的安全。通过对地下与露天复合采动影响下地表变形规律进行研究,建立了相应的移动模型。在此基础上,对移动参数的计算方法及地面变形区的划分方法等问题进行了研究。然后,依据当前形量和后续变形量大小,对矿山继续开采可能产生的破坏范围进行了划分     

基于Bayes准则的广义判别预报模式及其应用

根据Ｂａｙｅｓ准则,提出一种时间序列与多元分析相结合的广义判别模式．该模式既保留了时间序列线性模式的优点,同时又吸收了多元分析线性模式的长处．从气象状况演变的物理机制来看,这种综合考虑系统状况的方法比单纯考虑前期状态演变或单纯考虑某一时次的状态更有意义．     

水库二维水流泥沙数学模型及应用

建立水库坝区平面二维水流泥沙数学模型,考虑了悬移质非均匀,非饱和输沙特性,采用正交曲线坐标拟合复杂边界、ＳＩＭＰＬＥＣ程式离散求解及动边界技术。用该模型对白沙水库流场和河床变形进行了数值验证,计算了典型年条件下,水库取水口附近流场和河床局部形态。结果表明,坝前取水口漏斗基本保持稳定状态。     

瀑布沟土石坝防渗墙应力变形分析

用三维弹塑性有限元计算分析了瀑布沟土石坝混凝土防渗墙的应力变形特征.防渗墙的应力变形受到“边界效应”,墙顶、墙底的预留压紧量,墙土之间的相对剪切及廊道纵向刚度等因素的影响。为了改善防渗墙的工作性状,文中提出了几点建议。     

膨胀土的浸水规律

根据土体浸水速率（导水库）与土体结构的理论关系和膨胀土结构的分形模型,导出了膨胀土的浸水速率与含水量,吸力、时间和上覆荷载的相关关系。理论和试验结果表明：膨胀土的浸水速率与含水量、吸力和时间在双对数坐标上呈直线相关,随着含水量增加、吸力减小,浸水速率增大、浸水速率随时间延长而减小;浸水速率的对数与上覆荷载呈直线相关,上覆荷载越大,浸水速率越小。     

2-Carboxyethylgermanium sesquioxide,a synthetic organogermanium compound,as an inducer of contrasuppressor T cells

2-Carboxyethylgermanium sesquioxide (Ge-132), a synthesized organogermanium compound with immunomodulaing activities, was shown to be an inducer of anti-suppressor T cells in normal mice. The suppressor cell activity of T6S cells, a clone of burn-induced CD8⁺ IL-4-producing suppressor T cells, was clearly inhibited when a mixed lymphocyte-tumor cell reaction of the clone was conducted with splenic mononuclear cells from mice treated orally with a 100 mg/kg dose of Ge-132. The activity of anti-suppressor cells was demonstrated in spleens of mice 2 days after treatment with Ge-132 and reached its peak on day 3. The anti-suppressor cells induced by the compound were of a contrasuppressor T cell-linage, because they were characterized as CD4⁺ CD28⁺ TCR/⁺ Vicia villosa lectin-adherent T cells. These cells produced IFN- but did not produce IL-2, IL-4, IL-6 or IL-10 in their culture fluids. CD4⁺ anti-suppressor T cells induced by Ge-132 may be different from other subsets of CD4⁺ T cells because Th1 and Th2 cells generated in our laboratory did not adhere toVicia villosa lectin-coated petri dishes, and each produced specific cytokines. Th1 cells produced IFN- and IL-2 while Th2 cells produce IL-4 and IL-10 in vitro. These results suggest that Ge-132 may be useful as an inducer of contrasuppressor T cells in immunocompromised individuals bearing suppressor T cells. To eliminate suppressor T cells from immunocompromised hosts may result in improved resistance from various opportunistic infections.     

冲击波作用下粉末颗粒效应及其形成过程

采用两种颗粒尺寸相差悬珠的高速钢粉末进行爆炸烧结机制的研究,发现了明显的“颗粒效应”,烧结过程首先在小颗粒变形量最大的尖角处发生熔化,在冲击波作用下使液体流激烈运动,加速了颗粒的熔化,最后使颗粒相互粘结在一起,达到烧结的目的。