扩散的

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。

In the Chapter 2 of this dissertation, new pulse sequences were introduced, in which CPMG and bipolar gradient pulses have been implemented into pulsed-filed-gradients spin-echo NMR spectroscopy, and is used to measure the self-diffusion coefficient of metabolites in bio-fluids.

实验结果表明，这种新方法不仅可以在生物体温或更高温度下准确测量分子的自扩散系数，不受对流和背景梯度的干扰，同时还具有复杂核磁共振谱的编辑功能，能够在不做任何物理分离的条件下，分别研究生物大分子和小分子的扩散系数，以及分子之间的相互作用。

The exact expressions of minimal martingale measure and the minimal entropy martingale measure for jump diffusion semimartingale are gained,with the specific changes of intensity and density function processes in these measures.

在跳扩散半鞅模型中，引进了跳的强度过程与跳的概率密度函数过程，研究了测度变换对跳的强度与密度函数过程引起的变化、研究了跳扩散半鞅的最小鞅测度与最小熵鞅测度。

But operation operation often can increase sex of source of malign cell cure to diffuse odds and the result that affects operation cure. 1954 the Cole idea that put forward to manipulate a technology without tumour [2] , it is the to decrease or prevent cancer cell desquamation in showing the operation in malignant tumor is operated, cultivate and sow what come loose and adopt a series of measure, its purpose is to prevent path of blood of cancer cell edge, lymphatic path to diffuse, 2 it is to prevent cancer cell to cultivate.

但手术操作往往会增加恶性细胞医源性扩散几率而影响手术治疗的效果。1954年Cole等提出了无瘤操作技术的概念[2]，它是指在恶性肿瘤的手术操作中为减少或防止癌细胞的脱落、种植和播散而采取的一系列办法，其目的一是防止癌细胞沿血道、淋巴道扩散，二是防止癌细胞种植。

A basic review on dielectric nonlinearity and electric tunable mechanism was performed in view of thermodynamics, ferroelectric domain, polar nanoregion, field induced phase transition, grain boundary layer and AC dielectric nonlinearity. The dielectric nonlinearity phenomena in barium stannate titanate ceramics were studied and the field dependences of dielectric constant and loss tangent were showed.

关于低温介电弛豫行为与极性微区关系的讨论涉及到了弛豫铁电体与扩散相变铁电体之间的相容关系，作者认为所有的扩散相变铁电体都应该是弛豫铁电体或潜在的弛豫铁电体，它们的区别仅在于能够观测到介电弛豫现象的测试频率范围不同。

ZHOU Zhangjian（Laboratory of Special Ceramics and Powder Metallurgy, USTBeijing, Beijing, 100083, China）Abstract:On the basis of analysisof developing background and theory of thermoelectric graded materials, p-type (Bi1-0.85Sb0.85)2Te3and PbTe two segments thermoelectrical graded materials with different barriers werefabricated by conventional hot-pressing process.

具有不同扩散势垒的p型(Bi1-0.85Sb0.85)2Te3和PbTe二元梯度热电材料的研制徐桂英葛昌纯高艳平周张健摘要：在分析了热电材料的发展背景和研究理论的基础上，采用热压法制备出单体和双层具有不同扩散势垒的(Bi1-0.85Sb0.85)2Te3与PbTe体系二元梯度热电材料。

A method using a tiny thermistor as heat transfer model was developed to measure thermophysical properties (thermal conductivity and thermal diffusivity) of three standand samples(ethanol, ethylene alcohol, solution of calcium chloride). Results showed that there was no significant difference between measurement and recommendation; results of thermal conductivity from thermistor method and heat probe method for carrot and potato samples showed no significant difference; results of thermal diffusivity between thermistor method and calculation for carrot and potato samples showed no significant difference.

在分析微珠状热敏电阻传热模型的基础上，在室温对标准样品（乙二醇、乙醇、氯化钙的水溶液）的热物性进行测定，结果显示，导热系数及热扩散系数的测量值与推荐值之间无显著性差异（p＞0.05）；热敏电阻法与热探针法对比测定胡萝卜及马铃薯两种农产品的导热系数，结果显示两种方法之间无显著性差异（p＞0.05）；热敏电阻法与常规计算对比测定胡萝卜及马铃薯两种农产品的热扩散系数，结果显示两种方法之间无显著性差异（p＞0.05）。

Abasic review on dielectric nonlinearity and electric tunable mechanism wasperformed in view of thermodynamics, ferroelectric domain, polar nanoregion,field induced phase transition, grain boundary layer and AC dielectricnonlinearity. The dielectric nonlinearity phenomena in barium stannate titanateceramics were studied and the field dependences of dielectric constant and losstangent were showed.

关于低温介电弛豫行为与极性微区关系的讨论涉及到了弛豫铁电体与扩散相变铁电体之间的相容关系，作者认为所有的扩散相变铁电体都应该是弛豫铁电体或潜在的弛豫铁电体，它们的区别仅在于能够观测到介电弛豫现象的测试频率范围不同。

Namely, the fluid of swift water and tiny whirlpool come from kinetics of the process which make the mass transfer better; 2 Increase alkalinity to improve the capability of abirritation of the system and an optimal pH condition which fit to acidic bacterium come into being.

即通过动力学措施造成反应器内流体介质的湍动及形成微涡旋，利用涡流扩散和对流扩散来加速传质；2提高所处理的碱度，增强系统的缓冲能力，控制酸化菌生存的最佳pH值范围，以实现系统在酸化段有机去除能力的高效性。

So the respiratory physiology a hydrodynamics is the base of studying how gas convect and diffuse in the hi In this paper, we introduce the physiological structure and the process of | convection and diffusion in the lung. After analyzing some kinds mathematical model, we have got a digital model through simplifying l Weible model.

本文介绍了肺体的生理结构以及气体在肺内的传输和扩散过程，通过对现有几种数学模型的分析后，在Weible肺解剖模型的基础上简化得到肺的一维喇叭口数学模型，把气体在三维空间传输和扩散问题转化为一维问题。

The concept of equivalent rotationally rigidity is offered and the formula of rotationally rigidity is obtained.

主要做了如下几个方面的工作：对伸臂位于顶部的单层框架—筒体模型进行分析，提出了等效转动约束的概念和转动约束刚度的表达式。

Male cats normally do not need aftercare with the exception of the night after the anesthetic.

男猫通常不需要善后除了晚上的麻醉。