迁移

The results also show that subtituent position on the benzene ring has a great influence on the transfer volume. The trends of change of δ〓ΔΦ〓〓 for mand p-isometers with the composition of the mixed solvent are similar. However, the position and amplitude of the limit valve are different from each other. These are discussed according to the inductive effect and the resonance effect.

研究发现：取代基在苯环上的取代位置对迁移偏摩尔体积有明显影响，间、对位取代的异构体在DMF-水混合溶剂中的δ〓Δφ〓〓随混合溶剂的组成变化规律相似，但极值点的位置及幅度有所不同，根据诱导效应和共轭效应对此进行了讨论。

This paper, however, proposes a countyscope gravity model to present the smallscale population migrations, using separated resident areas as basic calculation units.

在GIS的支持下，提出构建县域人口迁移引力模型，选择县域内独立的居民区片为计算单元来评价乡镇的人口吸引潜力和人口最大可能迁移目的地分布。

Ion gate is one of the important parts in an ion mobility spectrometer.The main function of the ion gate is to control the ions to fly into the drift tube in pulse mode.

离子门是离子迁移谱仪的一个重要部件，主要作用是用来控制离子以脉冲的方式有效地进入迁移管。

In this text, we present the Ion Mobility Spectrometer developed by the Third Research Institute of the Ministry of Public Security. Its radical structure is described, especially the core component, which is called drift tube, is depicted in detail. Also, some questions and corresponding solutions encountered in the research of theinstrument are pointed out, which gives much valuable information to the laterresearchers.

本文主要介绍了公安部第三研究所自行研制的离子迁移谱仪，描述了它的基本结构，并详细介绍了其核心部件迁移管的构造，指出了我们在仪器研制中碰到的诸多问题以及相应的解决方法，为以后的仪器研制提供了有价值的参考资料。

The ion mobility was measured at different temperatures and the effects of the temperature in drift tube on the variety and yield of the reactant ions and product ion s were discussed.

本研究在不同温度下进行了离子迁移率实验，结果表明，离子迁移率随温度的升高而增大，而提高工作温度可以减少水分子对产物离子的影响，有利于改善系统检测的分辨率；选择合适漂移管工作温度，能有效地增加反应物离子的产量，从而提高系统检测的灵敏度和选择性。

The results show that the ion mobility increases as temperature rises; the influence of water vapor on product ions was reduced and the system resolution was enhanced at a higher temperature. In addition, the reactant ion yield can be effectively increased by choosing a proper temperature in drift tube, and improves the sensitivity and selectivity of system.

本研究在不同温度下进行了离子迁移率实验，结果表明，离子迁移率随温度的升高而增大，而提高工作温度可以减少水分子对产物离子的影响，有利于改善系统检测的分辨率；选择合适漂移管工作温度，能有效地增加反应物离子的产量，从而提高系统检测的灵敏度和选择性。

Ion mobility spectrometry ; ion mobility ; drift tube ; reactant ion ; product ion

离子迁移率谱；离子迁移；漂移管；反应物离子；产物离子

There are thinks the double features of saline and alkaline for the formation and evolutionprocess of the salinization soils in this region,the generation intensity and scale are related withgeomorphological types,shallow water geochemical types,shallow water table and soil structureetc.,presents the quantity relationship between the salinization degree of the soils,shallow watertable and mineralization,expounds the four stage and seasonal succession features of slattransference and inversion,discuss the interaction between ions in shallow water and soils and thethe regularity of the salt transference and accumulation under freeze-thaw action.

本文在野外调查、监测及实验研究的基础上提出松嫩平原盐渍土的形成过程存在盐化与碱化双重作用，其发生强度和规模与地貌、潜水类型、径流条件、潜水水位、土壤结构有关，提取出潜水埋深、矿化度与土壤盐渍化程度关系的定量指标，以及土壤盐分迁移转化季节性变化的四个阶段及其特征。同时重点研究了潜水与土壤之间元素交互作用及冻融作用下盐分迁移和聚积规律，为土壤次生盐渍化的防治提供了理伦依据和技术支撑。

Secondly, to investigate the effect of FK506 on Human embryonic Schwann cell migration in vitro.

其次，研究FK506对人胚雪旺细胞体外培养迁移活性的影响，结果显示FK506能促进人胚雪旺细胞的迁移并抑制成纤维细胞的生长，这种作用在较低浓度时也能产生明显效果。

Secondly, on the base of Jarrow's(1997) credit rating mitigation matrices estimating approach, this dissertation focuses on the macro economic's influntion and assumes credit rating mitigation is Non-homogeneous Markov Chain conditional on macro economic risk factors.

最后以Duffie和Singleton(1999)的基于违约强度的市值回收公司债券定价模型为基础，在信用评级迁移为条件Markov链的假设下，使用带跳跃的均值回复过程描述信用评级迁移事件，建立公司债券定价模型，进而利用带跳跃均值回复过程的良好性质解决风险中性期望问题，求得公司债券价格的显式解，得到每一信用评级公司债券的信用价差。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。