查询词典 elasticity of substitution

Based on B-trichloroborazine with boron-nitrogen ring structure, the monomer was synthesized by substitution reaction with different molar ratio of propylamine/isopropylamine, then the corresponding polylyborazine was obtained through thermal polymerization.

以三氯环硼氮烷为原料，将其与正丙胺／异丙胺进行共取代反应，制得了不同结构的取代单体，再经热聚合反应获得了相应的聚硼氮烷先驱体。

In conclusion, a catechol moiety is presumably to be essential for its activity and substitution of the p-hydroxybenzyl group at C-1 position with correct stereochemistry in the isoquinoline molecule makes a great contribution to the activation of beta adrenergic receptors.

本实验初步结果发现，对於去甲基乌药碱分子之药效，catechol基是必备无疑；而异喹啉环的碳－1位置上取代的p-hydroxybenzyl基对於药效有非常大的影响；至於其立体化学的配位是有立体选择性的。

On the basis of isotopic substitution experiments and theoretical calculations, various reaction ...

结合同位素取代实验和量子化学理论计算，对反应产生的活性中间体和产物进行了归属，并探讨了相关的反应机理。

The products have an isoxazole mother core with 3-morpholinopyridyl substitution and possess an approxi-mately planar structure. In addition a number of ester groups, amino groups, triazole groups and oxazolidi-none groups were introduced to 5-position of the isoxazole mother core.

这些化合物均以异噁唑为母核，具有近似的平面结构，在异噁唑环的3-位引入吗啉吡啶基，而在5-位引入酯基、取代氨基、三唑环和噁唑烷酮环。

On the other hand, on account of the accumulation of past experience and the popularity of "Valuing virtues; undervaluing penalty", law makers and executors were then capable of laying down effective regulations in connection With specific groups, specific procedures and specific situations. This marked the maturity of the Remission Policy and thereby arose such judicative customs as remission coming of suicide and substitution etc. All these embody the class nature of legislation and Judicature as well as a certain degree of reasonableness and progressiveness.

另一方面，由于秦汉时期对既往经验的总结以及汉时&尚德厌刑&的社会风尚的影响，当时法律的制定和执行者们已经能够针对特定人群、特定情节与特定情况作出相应的减免规定与决定，从而使得秦汉律法中的减免体系得到完备，并导致自杀免罪，替代免刑等若干免罪司法司惯的出现，这其中既体现了秦汉立法与司法行为所具有的阶级本质特点，又反映出其所包含的一定程度的科学性与进步性。

On the other hand,the Inverse PCR combined with a tail-to-tail primer design requires T4 DNA ligase enzyme to ligate PCR products,which makes the positive rate relatively low.We aim to find out an easy and effective method to perform gene deletion, insertion and substitution mutation.

近几年，有文献报道使用基于Quikchange原理的方法来制作DNA片段的插入、替代以及删除突变，但由于QCM-PCR的低产量，难以产生阳性克隆。

As a developing country, there still have 30 years to stop the production and distribution of R 22 in China , and there are very few technical obstacles in substituting C22 for R 410A . But the substitution will follow with the higher costs of production. And because of the threat of 揼 lobal warming? the future of R 410A is still unclear. How can the air-conditioner industry deal with this problem?

作为发展中国家，中国距最终禁止 R22 的生产与销售还有 30 余年，虽然目前进行绿色制冷剂的替代在技术上的障碍并不多，但随之而来的却是空调生产成本的提高，而且面对着全球变暖的问题， R 410A 等绿色制冷剂的前景还并不明朗，那么在这个问题上，空调行业将走向何方？

Therefore, some methods of substitution for a real heterogeneous material with the homogeneous one, macroscopically equivalent, are used.

因此有必要寻找一种新的理论来实现这一复杂的分析过程。

By means of FTIR,SEM,DSC,TGA and XRD,we studied the microstructure,particle shape,meltage temperature,decomposition temperature and crystal degree,and gained better understanding about influences of different degrees of substitution on microstructure and thermal property of starch acetates.

用傅立叶红外、扫描电镜、差示扫描量热、热失重和X射线衍射测试技术对淀粉醋酸酯的结构、形貌、熔融温度、分解温度和结晶度进行表征，分析了不同取代度对醋酸酯淀粉的热性能及其结晶结构的影响。

H2SO4. By means of FTIR, SEM, DSC, TGA and XRD, we studied the microstructure, particle shape, meltage temperature, decomposition temperature and crystal degree, and gained better understanding about influences of different degrees of substitution on microstructure and thermal property of starch acetates.

用傅立叶红外、扫描电镜、差示扫描量热、热失重和X射线衍射测试技术对淀粉醋酸酯的结构、形貌、熔融温度、分解温度和结晶度进行表征，分析了不同取代度对醋酸酯淀粉的热性能及其结晶结构的影响。

You can snipe the second and third union leaders from this position.

您可以鹬第二和第三工会领袖从这一立场出发。

Aiming at the currently shortage of XML streams quality detecting, this paper proposes a new forecasting method of XML streams quality by least squares support vector machines, which is used the method of XML keys' vector matrix as windows, and vector product wavelet transform to multilevel decompose and refactor the XML streams series, that can fulfill real-time checking demand of XML quality, and ensure constraint, consist- ency and integrality. For even more adapting net load, it proposes a control strategy by weight and adaptive adjustment to ensure XML streams quality.

针对当前XML数据流质量检测存在的不足，提出构建XML键的矢量矩阵作为窗口，利用矢量积小波变换多级分解与重构XML数据流，再结合最小二乘支持向量机对XML数据流质量进行预测的一种方法，满足XML数据流质量重构时实时检测的要求，保证XML数据的约束性、一致性与完整性；为了更好的适应网络负载，采取加权与自适应窗口调整等调度策略充分保证XML数据流的质量检测。