向列相液晶光学双稳态

本文以高斯光束传输矩阵几何光学近似分析法入手,得到向列相液晶光自聚焦和光双稳性的解析结果.很好地解释了EBBA液晶样品的某些实验现象;并再次证实了双稳性起源于光致重取向效应.     

双苯螺磷阻燃剂的合成及应用

本文介绍在采用苯基二氯磷酸酯与季戊四醇反应合成双苯螺磷阻燃剂时，不用催化剂、不用反应溶剂、不用缚酸剂及用不同的精制方法进行了试验，可以较简便较高收率制得产物双苯螺磷阻燃剂，将其6～8份Phr添加于ABS树脂，可得到UL94V-2（3．2mm）级阻燃效果，并且无泛黄变色问题，还有较好熔体流动性等优异特点。     

The Bisphosphonate Clodronate Modifying Hydroxyapatite Bioceramics for Bone Scaffold

To investigate the efficiency of clodronate modifying HA bioceramics,and to evaluate the effect of clodronate modifying HA bioceramics on the cells in vitro,clodronate modified the porous HA bioceramics for bone scaffold by chelation .The outermost layer of the specimens was analyzd by XPS and FI-IR ,The depth profile was investigated by the argon-ion sputtering method.The cell culture test was conducted using MC3T3-E1 osteoblastic cells,The cells were inoculated and cultured on the scaffolds.Morphological observation of the cells,MTT test and ALP activity test evaluated the cell attachment ,proliferation and activity on the scaffolds.The cell culture test in cell quantity and morphology indicated active proliferation of the cells on the scaffolds.The ALP activity of the cells cultured for 3d and 7d on clodronate-HA bioceramics was slightly higher than that on HA bioceramics ,but the difference was not signifcant,This result indicated that clodronate-HA bioeramics had favorable cytocompatibility to be used as bone scaffold with potential ability to improve asteogensis.     

塔机"滑钩"事故发生的原因及预防措施

塔式起重机的起升机构有多种变速方法，选用绕线转子电机。加带电磁离合器换档的减速机是其中方法之一。这种机构调速范围广，能满足塔机各种起升速度的要求。但在实际运用中存在着易损件较多，寿命短。电磁离合器可靠性差等缺点。如果电磁离合器失效打滑．吊在空中的物料会突然以失控状态掉下，极易造成事故。通常把这种现象称为“滑钩”。     

市场风向标：DC篇

奥林巴斯 FE-120入门精选1399元，23mm超广角双镜头 柯达V570 2799元，触摸液晶屏 索尼N1 3400元，佳能长焦S3跌至3680元，富士F30价格跳水近200元，     

铝钛双金属板KR曲线测定

利用宽３００ｍｍ、长／宽＝１的横向ＣＴＴ试样对国产铝钛双金属板做了常规力学性能测定，并按航标测定了ＫＲ曲线，经过柔度法和Ｋ值计算，分别测得了ＫＲｉ和ａｉ数据，确定了临界的ＫＣ值通过性能数据对比，研制的材料达到了进口料的性能要求。     

实用双代号搭接网络

双代号搭接网络计划,具有逻辑关系明确,图面直观的优点。它虽沿用双代号网络的计算方法,但体现了工序的充分搭接,并通过验算调整,筛掉了其中不合理部分,把网络计划的绘制和优化融为一体。