基于XML技术数据库优化接入设计

鉴于用户对目前数据库接入技术要求的提高，一种基于XML技术对数据库接入进行优化的技术出现了。这种技术利用了基于XML传输时的可扩展、高度结构化等特性，在JavaBean，JDBC，Apache，Tomcat等设计组件及Linux体系结构的配合使用下．为用户提供了一个安全、高效、可扩展且访问灵活的数据库接入方式。     

一种楼宇无线自动抄表系统的设计

介绍了一种以无线方式实现自动抄表的数据采集系统，给出院 系统的总体设计，详细说明了主站，分站的工作原理以及主站和分站之间的通讯方式。     

Synthesis and properties of novel amphiphilic sulfated ionomers by the ring‐opening reaction of an epoxidized styrene–butadiene–styrene triblock copolymer

A method for the synthesis of novel sulfated ionomer of styrene–butadiene–styrene triblock copolymer (SBS) was developed. SBS was first epoxidized by performic acid in the presence of a phase‐transfer catalyst; this was followed by a ring‐opening reaction with an aqueous solution of alkali salt of bisulfate. The optimum conditions for the ring‐opening reaction of the epoxidized SBS with an aqueous solution of KHSO₄ were studied. During the ring‐opening reaction, both phase‐transfer catalyst and ring‐opening catalyst were necessary to enhance the conversion of epoxy groups to ionic groups. The products were characterized with Fourier transform infrared spectrophotometry and transmission electron microscopy (TEM). After the potassium ions of the ionomer were substituted with lead ions, the lead sulfated ionomer exhibited dark spots under TEM. Some properties of the sulfated ionomer were studied. With increasing ionic groups or ionic potential of the cations, the water absorbency and emulsifying volume of the ionomer and the intrinsic viscosity of the ionomer solution increased, whereas the oil absorbency decreased. The sulfated ionomer possessed excellent emulsifying properties compared with the sulfonated SBS ionomer. The sodium sulfated ionomers in the presence of 10% zinc stearate showed better mechanical properties than the original SBS. When the ionomer was blended with crystalline polypropylene, a synergistic effect occurred with respect to the tensile strength. The ionomer behaved as a compatibilizer for blending equal amounts of SBS and oil‐resistant chlorohydrin rubber. In the presence of 3% ionomer, the blend exhibited much better mechanical properties and solvent resistance than the blend without the ionomer. SEM photographs indicated improved compatibility between the two components of the blend in the presence of the ionomer. © 2007 Wiley Periodicals, Inc. J Appl Polym Sci, 2008     

旋转喷淋式干红发酵罐的设计及改进方案

介绍了一种实用新型干红葡萄酒发酵罐。它利用设置在罐顶的旋转喷淋装置对浮于液面上的葡萄皮进行间歇喷淋。解决了葡萄皮由于长期与空气接触而变质发霉的问题。与上次介绍的压板式干红葡萄酒发酵罐的区别在于：它具有制造难度小、生产成本低、维护容易等优点。适用于中小型葡萄酒厂的推广与应用。     

CO毒化AB5型合金分形特征研究

研究了三种贮氢合金 L a Ni5、L a Ni4 .7Al0 .3、Ml Ni4 .5Al0 .5被 10 0× 10 - 6 CO毒化后的分形特征 ,求出这三种合金在含 10 0× 10 - 6 CO的氢中循环 ,分维分别为 0 .2 5 4 7、0 .170 9、0 .0 72 5。可以较好的解释合金被毒化的宏观现象。     

河南油田泌阳凹陷稠油地化录井评价方法

河南油田泌阳凹陷分布有古城、井楼、杨楼、新庄4个稠油油田，各油田油质复杂，查清各区块、各层系稠油油质是开发生产的重要工作之一。通过对稠油层基本特征分析，应用地化录井参数建立了TPI评价法、原油密度评价法及原油黏度评价法。TPI评价法主要是利用原油中气态烃和液态烃与全烃比值大小划分油质类型；原油密度评价法主要利用油质重，TPI值小，反之TPI值大的关系划分油质类型；原油黏度评价法主要利用TPI反映油质组分的综合性参数的特点，建立TPI与黏度的关系。这套评价评价方法提供了快速精细评价稠油油质的新手段。     

激光角膜矫正术中所用激光波长的选择

用分光光度计测定了12例兔角膜和1例人角膜的吸收光谱,结果表明波长小于300nm的准分子激光和波长在1.88μm～2.64μm,2.36μm～40μm的激光,均可对角膜进行切割并可望用于激光角膜矫正术。     

几种吸附式致冷新工质对的性能预测

应用吸附平衡基本理论对几种可能的吸附式致冷新工质对的性能进行了预测。结果表明，烷烃系列的低混点工质与沸石的配对体系是不可取的，而沸石－氨、活性炭－丙酮、活性炭－氨及活性炭－乙醇则是沸石－水、活性炭－甲醇体系的适宜的替代物。     

Improved fully-balanced current-mode integrator

A high CMRR fully-balanced current-mode integrator structure is presented. The proposed structure improves the CMRR at low frequencies by a factor of g_m/g_o. Moreover, the structure provides more flexibility to guarantee stability and is significantly less sensitive to process mismatches. The differential and common-mode gains and CMRR at low and high frequencies are analysed as well as verified in simulation     

超短脉冲光电导开关的全波分析

本文采用时域有限差分法直接求解包含传导电流的三维麦克斯韦方程组,对超短脉冲光电导开关进行全波分析,分析中考虑了静电场影响,采用了比较精确的光电导数学模型。本文还讨论了开关输出信号的模式组成和激光脉冲能量、脉宽对开关性能的影响,并给出了光电导开关响应在不同时刻的三维图形。