高速加工中心主轴系统动力学建模及优化设计

建立了DMU-70V五轴数控高速加工中心主轴-夹具-刀具系统的有限元模型，并利用动态测试的方法对有限元计算结果进行验证；以提高低阶固有频率作为动态优化目标函数，对主轴系统进行了优化设计。     

A force control high-order single-step-β method (HSM) for substructure pseudo-dynamic testing

This paper proposes a new technique which introduces the high-order single-step-β method(HSM)into the experimental study on the substructure pseudo-dynamic testing(SPDT).The technique is based on the proposed concept of equivalent shear stiffness which can meet the requirement of the HSM algorithm.A study is done to theoretically validate the technique by the numerical analysis of two-storey shear building structure,in comparison of the proposed substructure pseudo-dynamic testing algorithm with the central difference method(CDM).Then,a full-scale SPDT model,the three-storey frame-supported reinforced concrete short-limb masonry shear wall structure,is designed and tested to simulate the seismic response of the corresponding six-storey structure and verify the proposed force control HSM technique.Meanwhile,the techniques of both stiffness correction and force control are suggested to control algorithmic error,control error and measurement error.The results indicate that the force control HSM can be used in the full-scale multi-degree-of-freedom(MDOF)substructure pseudo-dynamic testing before descent segment of structure restoring force properties.     

摩托车曲柄锻模高速加工

介绍了锻模的高速加工，论述了实施高速加工的支撑技术。     

PIN BLOCK的一种攻击方法及其对策

介绍了一种通过加密机所提供的指令接口对PIN BLOCK进行攻击的方法。该方法无须知道加密密钥。同时针对PIN BLOCK攻击方 式给出了相应的对策。     

Lonidamine Solid Dispersions: In Vitro and In Vivo Evaluation

ABSTRACT

Solid dispersions of lonidamine in PEG 4000 and PVP K 29/32 were prepared by the spray-drying method. Then, the binary systems were studied and characterized using differential scanning calorimetry, hot stage microscopy, and x-ray diffractometry. In vitro dissolution studies of the solid dispersed powders were performed to verify if any lonidamine dissolution rate or water solubility improvement occurred. In vivo tests were carried out on the solid dispersions and on the cyclodextrin inclusion complexes to verify if this lonidamine water solubility increase was really able to improve the in vivo drug plasma levels. Drug water solubility was increased by the solid dispersion formation, and the extent of increase depended on the polymer content of the powder. The greater increase of solubility corresponded to the highest content of polymer. Both the solid dispersions and the cyclodextrin complexes were able to improve the in vivo bioavailability of the lonidamine when administered per os. Particularly, the AUC of the drug plasma levels was increased from 1.5 to 1.9-fold depending on the type of carrier.     

Lonidamine solid dispersions: in vitro and in vivo evaluation

Solid dispersions of lonidamine in PEG 4000 and PVP K 29/32 were prepared by the spray-drying method. Then, the binary systems were studied and characterized using differential scanning calorimetry, hot stage microscopy, and x-ray diffractometry. In vitro dissolution studies of the solid dispersed powders were performed to verify if any lonidamine dissolution rate or water solubility improvement occurred. In vivo tests were carried out on the solid dispersions and on the cyclodextrin inclusion complexes to verify if this lonidamine water solubility increase was really able to improve the in vivo drug plasma levels. Drug water solubility was increased by the solid dispersion formation, and the extent of increase depended on the polymer content of the powder. The greater increase of solubility corresponded to the highest content of polymer. Both the solid dispersions and the cyclodextrin complexes were able to improve the in vivo bioavailability of the lonidamine when administered per os. Particularly, the AUC of the drug plasma levels was increased from 1.5 to 1.9-fold depending on the type of carrier.     

一种基于相关反馈的图像内在语义模型

本文介绍了一种新的语义模型-图像内在语义模型ⅡSM（image internal semantic model）。这种模型通过分析相关反馈的图像检索的结果来提取语义信息，然后对所有图像计算两两之间的互信息，利用互信息对图像进行语义聚类。实验结果表明这种语义模型利用图像之间的语义相关性能提高查询的效率，并且能较准确的将数据库中的图像按语义分类。     

浅谈存储区域网的管理

本文首先从存储管理的角度介绍了SAN的物理结构和逻辑结构，简要介绍了SAN存储管理的特点，详细分析了SAN存储管理的结构及其关键技术。     

全新可升级ATE保障未来三代器件需求

存储器制造商一直在寻找一种既能满足其生产和功能需求又能提供比一代器件寿命更长、投资价值更高的节约型ATE解决方案.     

太钢热连轧活套控制系统的设计与实现

介绍了液压活套的工作原理和控制特点,确定了活套微张力自动控制系统的总体设计思想.全自动液压活套张力控制能够实现机架间稳定控制,具有非常好的实用价值,在同类行业中也具有较大的推广意义.