《桂东明珠——梧州》多媒体光盘的设计与制作

介绍《桂东明珠－梧州》多媒体光盘的设计与制作的技术方案及实施措施。     

Effects of organic modifiers on the size-controlled synthesis of hydroxyapatite nanorods

Size-controlled synthesis of hydroxyapatite nanorods were carried out by chemical precipitation method using polyethylene glycol (MW 600), Tween 20, trisodium citrate, and d-sorbitol as organic modifiers and starting from calcium nitrate, phosphoric acid, and ammonia solution. The influence of the organic modifiers on the sizes of the resultant HAP nanorods was investigated under different synthesis temperatures. It was found that polyethylene glycol was beneficial to the formation of HAP nanorods with a larger aspect ratio (average length/average diameter) at high synthesis temperature, Tween 20 and trisodium citrate favored the formation of small-sized HAP nanorods, and d-sorbitol helped the formation of HAP nanorods with long length at low synthesis temperatures.     

南村地质灾害分析

通过实际资料，详细论述了南村的地质灾害现状，初步分析了南村地质灾害的形成机理，并讨论了校区地质灾害应采取的防治对策。     

河南的红菇科真菌资源研究（Ⅲ）

红菇属（Ｒｕｓｓｕｌａ）的大多数种类分布在温带地区。河南省位于暖温带和亚热带的过渡地带，因此红菇属的种类分布较为丰富。本文继续描述河南境内分布的红菇属的种类及其经济价值。     

机床主轴轴承热诱导预紧力及刚度计算与实验研究

为了研究机床主轴系统非均匀温升带来的热位移对轴承预紧力和动刚度的影响,建立了一种机床主轴系统热机耦合模型。在分析轴承摩擦损耗影响因素的基础上,确定了系统热载荷和边界条件,采用有限元方法求解了机床主轴瞬时温升和热变形,根据轴承载荷-位移关系式求解轴承的热诱导预紧力,基于改进的Jones模型计算了轴承径向刚度。最后,实验测定轴承预紧力,分析预紧力影响因素。理论计算与实验结果表明:在定位预紧下,主轴、隔圈、轴承座和轴承热位移会导致轴承预紧力和径向刚度的增加,且随着初始预紧力、转速和环境温度增加,预紧力变化幅值也增加。此外,局部冷却引起热位移的变化,从而改变轴承预紧力和径向刚度的变化规律。     

南通市1118例患儿发锌、铅含量与分析

为了解南通市患儿体内微量元素锌、铅含量及其关系,采用火焰原子吸收分光光度法对1 118例发锌、铅进行了检测分析,按性别、年龄做了锌、铅的相关分析。结果表明,缺锌率为77.91%;铅含量均在正常范围内;南通市患儿锌、铅的x-±s分别为(83.6±24.8)、(1.4±0.7)μg/g;低锌和低铅污染无负相关关系。     

A unique approach to the concise synthesis of highly optically active spirooxazolines and the discovery of a more potent oxindole-type phytoalexin analogue

Drug-lead synthesis through rapid construction of chiral molecular complexity around the biologically relevant framework using a highly efficient strategy is a key goal of organic synthesis. Molecules bearing a spirooxindole-type framework exhibit important bioactivities. Herein, we present a highly efficient and convenient strategy that allows rapid construction of unique optically active spiro[oxazoline-3,3'-oxindole]s through the organocatalyzed asymmetric synthesis of spirocyclic thiocarbamates via an aldol reaction. Preliminary biological evaluation of several of the spirooxazolines using a model of acute neuroinflammation revealed promising antipyretic activity and provided an opportunity to discover new antipyretic agents.     

水下目标高分辨方位估计特征分解法的C30硬件实验研究

高分辨方位估计特征分解法是一类性能良好的方法，本文从水下阵列信号处理的实际应用出发，对这类方法进行了C30硬件实验研究，所得结果为高分辨技术的实际应用提供了重要依据文中构造了高分辨方位估计的C30硬件实验系统；并实现了高分辨方位估计的Pisarenko法、MUSIC法、Johnson法和最小摸（Mininorm）法；对高分辨实验系统进行了仿真实验和消声水池实验，并测试了各特征分解法的运行时间．结果表明，高分辨C30实验系统表现了良好的方位估计统计性能和实时性能     

Asymmetrical spectral broadening of SRS and its temperature dependence in a phenylethanol liquid-core wave-guide optical fiber

Spectral broadening of stimulated Raman scattering has been studied in a phenylethanol liquid-core wave-guide optical fiber by using a frequency-doubled Q-switched Nd: YAG laser. Four orders of Stokes lines were observed. All the Stokes lines were asymmetrically broadened favoring the lower frequencies. Both the red-shifted broadening and the blue-shifted broadening increased with the rise of the temperature of the Raman medium. The asymmetric broadening was discussed to be mainly due to the effect of the cascaded stimulated Rayleigh-wing scattering.