马齿苋多糖的抗肿瘤活性

研究了马齿苋多糖的抗肿瘤活性。结果表明马齿苋多糖可使小鼠T淋巴细胞数量增加，体外对肝癌细胞SMMC7721的增殖具有一定的抑制作用，体内可使小鼠S180腹水瘤分裂指数显著下降，并能明显抑制小鼠S180移植性实体瘤生长。     

一种改进的点模式指纹匹配方法

自动指纹识别因其在身份认证方面所具有的方便、快速、准确等特点而得到了广泛的关注，而指纹匹配算法的研究又是其中一个非常重要的研究内容．针对基准点定位困难的问题，提出了一种根据特征点集合中3个近邻点所组成的子集之间的相互关系来确定基准点以及变换参数的算法．实验结果证明，该算法可以快速、准确的定位基准点，精确求取变换参数，指纹匹配的速度和准确率可以满足实际应用的需要．     

可拆装辐条式单面滑模在压力管道竖井混凝土施工中的应用

溪洛渡水电站引水压力管道竖井混凝土施工项目采用可拆装辐条式单面滑模施工技术,提高了工程质量、缩短了工期、减小了财力消耗.介绍了滑模的工作原理、结构设计及组装拆卸方法,运用有限元分析软件Workbench得到了L型提升架的应力应变状态,为滑模技术在其它竖井混凝土施工项目中的推广提供了理论依据.     

The development of Bi Fe O_3-based ceramics

The multiferroic properties of Bi Fe O3-based ceramics were improved through optimizing their sintering method and doping with certain rare earth elements in pure Bi Fe O3. Some methods, especially liquid-phase sintering method has largely decreased the densities of oxygen vacancies and Fe2in Bi Fe O3-based ceramics, and thus their resistivity became high enough to measure the saturated polarization and the large piezoelectric d33 coefficient under the high electric field of [150 k V/cm. Besides,multiferroic properties were improved through the rare earth elements’ doping in pure Bi Fe O3. Magnetization commonly increases with the proportional increase of Nd,La, Sm and Dy contents up to ＊30 %, while ferroelectric phase can transform to paraelectric phase at a certain proportion. An improved magnetoelectric coupling was often observed at ferroelectric phase with a relatively large proportion. Besides, an enhanced piezoelectric coefficient is expected in Bi Fe O3-based ceramics with morphotropic phase boundaries as they are already observed in thin epitaxial Bi Fe O3 films.     

淀粉废水的絮凝沉淀及生物处理

关于淀粉废水处理的综述已有文献〔1〕,吴锡康也曾对淀粉废水的絮凝沉淀处理及生物处理的各种方法做过阐述 ,并列举了相应的文献 〔2〕.文章对近年来国内外淀粉废水处理常用的两种方法 :絮凝沉淀处理及生物处理做了简单的综述 ,并列举了相应的文献资料 .     

40-Gb/s all-optical digital 4-bit priority encoder employing cross-gain modulation in semiconductor optical amplifiers

High-speed all-optical logic circuits have attracted much attention because of their important roles in signal processing in next-generation optical networks.The digital encoder is widely used in binary calculation,multiplexing,demultiplexing,address recognition and data encryption.A priority encoder allows the existence of multiple valid inputs simultaneously,identifies the priority of the request signals and encodes the priority.We propose and experimentally demonstrate an all-optical 4-bit priority encoder for return-to-zero signals at 40 Gbit/s based on cross-gain modulation in semiconductor optical amplifiers.Detuning fil-ters after semiconductor optical amplifiers are employed to improve the output performance.Correct logic bit sequences and clear open eye patterns with extinction ratios exceeding 10 dB are achieved.     

二株细菌处理石油废水的比较研究

从成都市郊区加油站附近分离到二株以石油烃类为碳源与能源的优势菌C-1与C-2,初步鉴定为假单胞菌(Pseudomonassp.)与芽孢杆菌(Bacillussp.),采用生物膜法对二株菌降解石油废水能力进行了比较.30℃,1.25L/min通气挂膜2星期后,处理南充炼油厂石油废水,处理效果C-1好于C-2,不同营养盐NH4NO3、K2HPO4·2H2O、NaH2PO4、NH4Cl对菌株C-1处理石油废水的作用不同,浓度为1000mg/LNH4NO3对菌株C-1处理石油废水效果最佳.     

直线电荷与带电圆柱导体间的互作用力及其变化曲线

用电象法导出直线电荷与保持恒定电势的圆柱导体之间的互作用力,以及几种情况下互作用力的变化曲线,并对曲线进行讨论.     

解析青春文学及青春文学出版现状

青春文学在内容方面充分体现了作为同龄人共有的生活场景、思维方式和性格特征,极易取得共鸣并获取情感上的宣泄。他们的写作体现了“80后”一代人的整体特征,个性张扬、叛逆不羁、惟我独尊等,作品中表现了很多同龄人共同的压抑感和迷茫感,在大量青少年读者中引起了强烈的共鸣。     

知道分子

属于一定阶级、阶层、集团或具有某种特征的人常习惯性地被称为“某某分子”,如“知识分子”“资产阶级分子”“积极分子”“好战分子”等。这类用来指称社会群体中某一类成员的语词带有很强的时代性,值得关注。“知道分子”就是如此。“今天,知识分子自身的生活正在经历一场意味深长的变化——被冠以‘知道分子’之名的意见领袖正成为这个古老群体的新身份”。