查询词典 diffusion air pump

The system at higher temperature becomes thermodynamically more stable, and raises the diffusion exchange rate of solvent and nonsolvent at the interface according to the diffusion kinetics. For the PANCMA/DMSO/ system, with the addition of DMSO to nonsolvent, the cloud point curves shifts to the polymer-nonsolvent axis, and the homogeneous phase region is broadened, system becomes thermodynamically more stable and needs more nonsolvent mixture to induce liquid-liquid phase separation.

通过浊点滴定，结合LCP半经验关系，可以得到制膜体系PANCMA/溶剂/非溶剂的三元相图浊点线，考察其相分离过程中的热力学性质，同时考察了溶剂和非溶剂双向扩散传质动力学，从体系热力学和动力学性质出发为PANCMA中空纤维膜的制备以及解释最终的膜结构和性能提供理论依据。

Objective To determine the relationship between the extent of the damage and clinical data in schizophrenia by using diffusion tensor imaging. Methods Twenty-two patients with schizophrenia and twenty normal controls received diffusion tensor scanning.

目的 应用磁共振扩散张最成像技术对精神分裂症患者额叶及胼胝体压部脑白质损伤情况与临床症状之间的关系进行初步研究。

Collecting patients which have typical clinical symptoms and have make a MRI check within 3 days, analysis the DWI image of 38 cases patients with cerebral hemorrhage, and make a relevant compare about the diffusion coefficient numerical of ADC at the same time,and it's performance almost the same with in DWI image;Also a relevant measuring and analysis have been done for the apparent diffusion coefficient numerical of edema inner or surrounding the lesions in ADC image.

收集临床症典型的三天以内进行MRI检查的患者，对经过DWI检查的38例脑出血患者的DWI图进行分析，同时进行ADC图扩散系数值的相关比较，影像表现与DWI图像表现大致相当，并对ADC图像上病灶中央和外周水肿区的表观扩散系数值做了相应测量分析。

This dissertation firstly analyses the background of this project, then analyses the research status of the AIP submarine, the gas leakage diffusion models, the numerical value solution of the diffusion equation, and the simulation research progress.

本文首先分析了本课题提出的背景，接着分析了目前国内外关于AIP潜艇的研究现状、气体泄漏扩散模型、扩散方程的数值解法、仿真研究进展，在此分析基础之上确定了本文的研究内容。

For intramolecular electron transfer reactions in solution,the fluctuations of the intramolecular vibrational modes are much faster than that of solvent mode.Thus,the reaction-diffusion equation is commonly used to describe the motion of solvent,with a sink function to treat the vibrational high-frequency mode.Based on this theory-so -called the Sumi-Marcus theory,we proposed an imaginary-time split operator approach to solve the reaction-diffusion equation.The approach is applied to evaluate the intermolecular ET rate between oxazine 1 and N,N-dimethlaniline.By measuring the two average survival times of the donor state probability and the rate constant in long time limit,the full kinetics of the ET is revealed with a variety of sink functions.

对于扩散控制的溶液中的电子转移反应，分子内振动模的运动比溶剂运动快很多，Sumi-Marcus理论提出用反应扩散方程(reaction-diffusion equation)处理溶剂的扩散运动，而分子内的振动用sink函数来表示，我们基于此理论发展了用虚时间分裂算符的方法(imaginary-time Split operator approach)解反应扩散方程，并将其应用于嗪1(oxazine 1，OX1)和N，N-二甲基苯胺分子之间的电子转移反应，Sink函数采用几种不同的微扰表达式，通过计算得到给体几率衰减的两种平均速率和长时间极限下的速率常数，揭示了该体系电子转移过程中的一些动力学性质。

The diffusion direction and volume of gas is decided by its own partial pressure difference、diffusion rate and the solubility in fluid.

各气体的扩散方向和量，决定于该气体的分压差、气体的扩散速度和气体在液体中的溶解度。

Drugs may cross a biologic barrier by passive diffusion, facilitated passive diffusion, active transport, or pinocytosis.

药物可通过被动扩散、易化被动扩散、主动转运或胞饮作用等方式穿越生物屏障。

Drugs may cro a biologic barrier by pa ive diffusion, facilitated pa ive diffusion, active tra ort, or pinocytosis.

药物可通过被动扩散、易化被动扩散、主动转运或胞饮作用等方式穿越生物屏障。

The SCVFV(the convection-diffusion difference scheme based on control-volume face values) scheme was put forward. The theory of the SCVFV scheme was systematically elaborated. The general interpolation formula of the SCVFV scheme was given. The formulas of the SCVFV scheme based on the Cartesian coordinate were derived. The precision, the mass conservation property and the preventability of the false-diffusion of the SCVFV scheme were theoretically analyzed.

提出了基于控制容积面值的对流扩散差分格式SCVFV，系统地阐述了SCVFV格式的基本思想，给出了SCVFV插值公式的通用表达式，推导了直角坐标系下完整的SCVFV格式的表达式，从理论上分析SCVFV格式的精度、守恒性及反伪扩散性。

The self-diffusion coefficients of supercritical carbon dioxide and infinite dilute diffusion coefficients of methanol and ethanol in supercritical carbon dioxide were investigated by molecular dynamics simulation.

采用分子动力学模拟的方法对超临界二氧化碳的自扩散系数及甲醇和乙醇在超临界二氧化破中的无限稀释扩散系数进行了模拟计算。

But Severus escaped the hands of those that Julianus had sent to murder him and sent a letter to the praetorian guard, giving them the signal either to desert Julianus or to kill him.

赛维鲁总算逃过了尤利阿努斯派来的杀手，并写了一封信给罗马的禁卫军，向他们发出信号，要么抛弃尤利阿努斯，要么干掉他。他们立即服从了。

This text is in terms of this of " human nature ", it is under the influence of western literature human nature thought to probe into, awakening in human nature of novel works and all sorts of limitations that affectionate The school of Mandarin Duck and butterfly.

本文便是从"人性"这一角度，探讨在西方文学人性思想的影响下，清末民初鸳鸯蝴蝶派的言情、哀情小说作品在人性方面的觉醒与种种局限。