The model consists of the conservation laws for the electron density and the current density coupled to the Poisson equation for the electrostatic potential.
该模型由电子密度和电流密度的守恒律方程组相合上关于静电位势的Poisson方程而组成。
The main content and result of this thesis include:(1) For the first time the author analysis the fractor that effect the test parameters of rock and its mechanism based on the rock geophysics, build the statistical rules of varity rock test parameter and summarize the relationships among rock test parameters and the three common used parameters in the clastic reservoir description, that are density, porosity and impedence, and draw a conclusion that the lame's constant, the poisson's ratio and the ratio between P and S wave are the optimal parameter used to distinguish gas/water and lithologic identification.
本文的主要研究内容和取得的成果有：①首次在川西坳陷中段从物探描述的角度独立进行了岩石物理研究工作，阐述了影响岩石物理测试参数的因素及其影响机理，建立了各种岩石物理测试参数的统计规律，总结了密度、孔隙度、波阻抗三种在碎屑岩气藏描述中常用的参数与岩石物理测试参数的关系，得出了拉梅常数、泊松比、纵横波速度比是区分气水和岩性的最佳参数的结论。
It is found that poisson ratio, tensile strength, horizontal stress contrast, cohensive force, angle of internal friction and formation pore pressure have effect on safe drilling mud density windows through analyzing the sensibility of formation parameter.
对地层参数敏感性分析发现，泊松比、抗拉强度、水平地应力差、粘聚力、内摩擦角和地层孔隙压力对计算安全钻井液密度窗口有不同程度的影响，所以地层的弹性和强度参数的确定对于进行井壁稳定性分析是十分必要的。
An aim is to optimize dynamic mechanics properties, density and Poisson's Ratio of the polymers.
主要优化高分子材料的动态力学性能参数、密度及泊松比，使其在所研究的频率范围内具有最大的吸声系数。
The effects of the photon density, APD's quench time, gate time and sample periods on the quality of the photon counting imaging were analyzed with the random sample theory of Poisson point process.
通过对光子事件发生时间统计特性的描述，分析了光子密度、门控时间、雪崩光电二极管恢复时间等因素对光子计数成像质量的影响。
In the paper, general equations among the fluid RTD density functions in a typical recycle system, the types of tracer input and the total response curve were developed and, successfully, used to help the RTD experiment on recycle condition and to treat the experimental data. For the numerical simulation of flow field in an irregular region formed with four curved boundaries, an idea and a fast method to generate body-fitted grid with grid lines orthogonal on the boundaries were presented based on Poisson equation system and, through the coordinate transformation and using vorticity Ω、stream function ψ and tangential velocity v as basic variables, the model equations of 3-D incompressible flow with axial symmetry under body-fitted coordinates were derived.
本文工作建立了直接在循环系统中进行RTD实验时总响应曲线、示踪剂输入方式、容器和循环管内流体RTD密度函数之间的普遍关系式，并成功用于指导实验和处理实验数据；针对不规划区域流场数值模似，以Poisson方程系统为基础，提出了在一般四边曲线区域上生成具有正交边界条件贴体坐标网格的构思和方法；通过坐标变换建立了贴体坐标下以涡量Ω、流函数ψ和切向速度v为基本变量的三维轴对称不可压缩问题的一般模型方程。
Poisson's equation:In space where the source density is ρ, the Laplacian of a: potential U is 2 U = 4πρK, where is the operator del and K is a constant (gravitational constant in case of mass and gravitational potential).
泊松方程：在源密度为ρ的空间中，位场 U 的拉普拉斯算子为：U = 4πρK，。在米-千克其中为 del 算子，K 为常数(质量的万有引力常数和重力势)秒单位制中应去掉常数 4π。
It contains Euler equations for conservation of mass, momentum and energy, and Poisson equation through which the gravitational potential is determined by the density distribution of the gas itself.
它包括由质量守恒方程、动量守恒方程和能量守恒方程构成的Euler方程组以及由星体本身的密度分布决定的自引力势能所满足的Poisson方程。
Key words: engineering mechanics; Poisson white noise; perturbation approach; dissipated Hamiltonian system; probability density function; generalized Fokker-Planck equation
关键 词：工程力学；泊松白噪声；摄动法；耗散的哈密顿系统；概率密度函数；广义Fokker-Planck 方程
Rapeseed physical properties such as bulk density, frictional factor, module of elasticity and Poisson ratio as well as permeability and adsorbability have direct or indirect influence on oilseed transportation and squeezing.
油菜籽散体的密度、摩擦因数、弹性模量和泊松比以及渗透性和吸附性等物理特性对油料的输送和压榨均有直接或间接的影响。
In this papers we based on that both density and measured data of positron imaging are poisson point process, and poisson distribution data has interscale dependent under Haar multiscale decomposition, We have presented a multiscale reconstruction method.
根据正电子成像的图像密度数据和测量数据都具有Poisson分布的特性，利用Poisson分布数据在多尺度Haar基分解下的尺度之间的统计联系，提出了一个基于多尺度分析的重建方法。
Elastic parameter such as impedance, velocity, Poisson ratio etc. and pre-stack amplitude, frequency attributes can be used to quantitatively predict the fracture density and direction.
利用阻抗、速度、泊松比等弹性参数和叠前振幅、频率属性可对裂缝密度和方位进行定量预测。
Poisson ratio and density of rock has little influence, so they are not the sensitive factor.
岩体的密度、泊松比对孔壁处应力变化影响很小，不是影响地应力测量精度的敏感因素。
In this paper, the current density equation, the continuity equations and the Poisson's equation for the semiconductor, devices with a position-dependent energy band structure are obtained from the Boltzmann's transport equation and the electrodynamics equations, respectively.
本文根据在异质半导体材料中，载流子能量是位置函数这一特点，分别从玻尔兹曼传输方程和电动力学公式得出了对异质材料器件也适用的电流密度方程、连续性方程和泊松方程。
According to current continuity equations and Poisson's equation, a complete analytic function for recombination probability density, current density and recombination efficiency was given.
－3.根据有机发光器件中激子的解离模型及电流连续性方程和Poisson方程，导出－＿了其复合几率密度、电流密度及复合效率的解析式。
The ion density, flux, dose distributions are calculated by solving Poisson's equation and the equations of ion motion and continuity using finite difference methods.
通过计算得到了鞘层内随时间变化的电势分布和离子密度分布，计算了端点附近材料表面处的离子流密度分布和注入剂量分布随时间的变化规律。
But the dynamic Poisson's ratio is smaller than the static Poisson's ratio; (4) the ratio of water content to density as transformation variable between dynamic and static elastic parameters has high fitting accuracy;
含水率与密度的比值作为研究动、静态弹性参数的关系变量，具有高的拟合精度；
The marginal recursive equations on excess-of-loss reinsurance treaty were investigated, under the assumption that the number of claims belongs to the family consisting of Poisson, binomial and negative binomial, and that the severity distribution had bounded continuous density function.
在索赔数目服从Poisson分布、二项分布或负二项分布，以及索赔额分布的密度函数连续且有界的条件下，研究了溢额损失再保险条款的总体损失分布的条件递推方程。
There is linear relationship between the density of carbonate rock and the longitudinal or rotational wave. Lithologic difference of carbonate rock can be judged with density, wave speed, longitudinal and rotational wave speed ratio or Poisson's ratio.
纵、横波速与岩石的密度具有线性关系，利用密度、波速、纵横波速比或泊松比可初步判断碳酸盐岩在岩性上的差别。
The Young's modulus of the foam with the strut of larger second moment of the cross sectional area gets higher than that of the foam with the same relative density and the Poisson's ratio in reverse.
在密度等同的条件下，筋条截面惯性矩越大的开孔泡沫材料，其弹性模量也越大，而泊松比则越小。