马钱子碱的高效液相色谱测定

报道了使用反相ＨＰＬＣ法用Ｃ１８柱在２５４ｍｍ测定马钱子碱的新方法。实验结果表明，这种方法操作方便，测定结果准确可靠。     

长圆形出口喷嘴射流特性的实验研究

在研究矩形出口喷嘴射流的基础上,对长圆形出口喷嘴的射流特性进行了室内实验研究.结果表明.长圆形喷嘴射流在短轴剖面上的扩散角比在长轴剖面上大.随喷距的增大.其横向截面将逐渐变为圆形.长圆形喷嘴的流量系数大于同样结构特征的矩形喷嘴,其射流的轴心动压力衰减以及横向动压力梯度分布规律与矩形喷嘴射流相似.随喷距增加.长圆形喷嘴的轴心动压力衰减比矩形喷嘴衰减慢.在钻头上使用的长圆形喷嘴的最佳无因次喷距应在无因次等速核长度L_1和最大轴心动压力衰减梯度所在的无因次喷距L_(max)之间.     

数字程控交换机计费系统JFXT的设计与实现

计费系统JFXT直接从数字程控交换机中提取信息,从而省略了需长期运行的数字采集部件及相应系统、适应长途计费、复式计费及宾馆计费等要求,并能进行实时与定时处理,具有完善的计费、统计、查询、打印及修改参数功能,操作方便、灵活。系统应用了汇编语言、高级语言和数据库语言混合编程及结构化与速成原型法等多种编程技术研制而成。     

克服扭摆吊丝非线性影响的方法

采取本底曲线扣除措施,扣除扭摆吊丝弹性恢复力矩非线性变化和环境温度变化产生的系统误差,可将扭摆的测量精度提高到9.6×10~(-3),周期的最大相对起伏减小到9.4×10~(-3)。     

建筑群与外部空间的整体意识：（Ⅰ）汽车站的总体设计

通过建筑外部空间理论的研究，提出建筑总体设计中的整体意识．以汽车站总体设计为例，阐述Ｎ空间的局部Ｐ化、锐角空间的钝化、不规则空间的几何化、化整为零等设计方法．     

乳液粒子的性能对最低成膜温度的影响

讨论了乳液粒子的粒度，形态以及单体的亲水性对乳液最低成膜温度的影响。乳液粒子粒度大，ＭＦＴ高，反之则低。ＭＦＴ随乳液体系的多分散性变化而变化。乳液粒子的形态影响ＭＦＴ，粒子外壳为硬聚合物的，ＭＦＴ高，反之则低，新水性单体倾向于留在乳液粒子的外壳层，因而ＭＦＴ的取值依赖于亲水单体的性能。     

The model of defense gene expression induced by signaling molecule β-ocimene

β-ocimene, a kind of monoterpene, was found recently as a plant communication signal molecule. It has two isomeric forms in nature: cis-β-ocimene and trans-β-ocimene. According to recent reports, all investigated plants, such as corn, cotton, lima bean, potato, tobacco, arabidopsis, and Mediterranean pine, could release the chemical component β-ocimene after fed by arthropod herbivores,     

An ordered mesoporous organosilica hybrid material with a crystal-like wall structure

Surfactant-mediated synthesis strategies are widely used to fabricate ordered mesoporous solids in the form of metal oxides, metals, carbon and hybrid organosilicas. These materials have amorphous pore walls, which could limit their practical utility. In the case of mesoporous metal oxides, efforts to crystallize the framework structure by thermal and hydrothermal treatments have resulted in crystallization of only a fraction of the pore walls. Here we report the surfactant-mediated synthesis of an ordered benzene-silica hybrid material; this material has an hexagonal array of mesopores with a lattice constant of 52.5 A, and crystal-like pore walls that exhibit structural periodicity with a spacing of 7.6 A along the channel direction. The periodic pore surface structure results from alternating hydrophilic and hydrophobic layers, composed of silica and benzene, respectively. We believe that this material is formed as a result of structure-directing interactions between the benzene-silica precursor molecules, and between the precursor molecules and the surfactants. We expect that other organosilicas and organo-metal oxides can be produced in a similar fashion, to yield a range of hierarchically ordered mesoporous solids with molecular-scale pore surface periodicity.     

关于节奏健美操锻炼价值的研究

节奏健美操是大体协"两操"分会推出的一套健身健美操,它具有编排的科学性、锻炼的实效性和开展的可行性.经过北京市部分高校试行和全国高校"两操"学习班中推广,均收到良好的效果.它的推出更加丰富了高校健美操课的内容.     

顾客满意度的模糊DEA评价

将模糊理论与DEA方法相结合评价顾客满意度,顾客只需作出自己的模糊印象结论,而每个决策单元的“输入”和“输出”的权重由其实际数据求得。