According to characteristics of normal analysis of water quality in the country at present,the article applies thermodynamics theory and conservation of mass,considering with the example,determines the element as the format of some compounds with distributed quotient and calculates their compositions.
针对目前国内水质常规分析特点和水质评价的现状,运用热力学原理和质量守恒定律,结合实例,确定了地下水中元素以配位化合物的存在形式,并对各种配位化合物的组分进行了计算,这对水质评价有重要的价值,特别对一些有毒元素的评价更有实际意义。
Large time behavior of solutions to the one dimensional scalar conservation law with relaxation;
带松弛项的单个守恒律方程解的大时间状态估计
We study the pointwise estimates of solutions for the conservation law with relaxation by Green\'s function.
考虑带松弛项的守恒律方程,用格林函数的方法得到了其整体解的逐点估计。
A new approach is introduced to prove optimal L 1 error estimates for various approximate methods,such as viscosity methods,monotone difference schemes and stiff relaxation approximations,to conservation laws.
介绍一种误差分析的新途径，并对守恒律方程各种近似方法如粘性法，单调差分格式及松弛近似等证明了最佳Ｌ１误差估计。
In this paper,the scalar conservation laws with discontinuous flux function is considered.
本文研究了具有间断流函数的守恒律方程,借助本质无振荡(ENO)的思想,利用Rankine-Hugoniot关系和全局熵条件设计出一种高精度计算格式;并利用此格式计算出相关情形的Riemann问题,显示了满意的数值解果。
Despite of non-uniqueness of solutions of conservations laws, conservation laws are deduced by physical phenomena, which determine the uniqueness.
由于守恒律程的弱解不唯一，而守恒律方程是由特定的物理现象推导出来的，这就决定了弱解的唯一性。
These are equations of local conservation of mass and the jump condition.
这些就是局部质量守恒方程和跃变条件。
This equation is the local equation of mass conservation of a species in solution.
这个方程就是溶液中一种组分的局部质量守恒方程。
SIMPLIFICATION OF THE MASS BALANCE EQUATION OF WATER STORAGE FORMATION AND ITS COUPLING WITH THE FLOW EQUATION UNDER VERTICAL ELASTICITY ASSUMPTION
储水层质量守恒方程的简化及在垂向弹性形变假定下与水流方程的耦合
Derivation and solutions to the differential form of mass conservation equations.
质量守恒微分方程的推导解析和解答。
Almost Conserved Qualities of Modiefied Energy for the Initial Value Problem of the Kawahara Equations;
Kawahara方程初值问题修正能量的几乎守恒性质
Conservation of Mass. Conservation of Momentum. Stress Tensor.
质量守恒，动量守恒，应力张量。
The Global Distributed Solution of Boltzmann Equation and Energy Conservation;
Boltzmann方程的分布解与能量守恒
Under these conditions the conservation of energy is equivalent to the conservation of mass.
在这种条件下，能量守恒和质量守恒是相等的。
Lie symmetries and conserved quantities of Poincare-Chetaev equations in terms quasi-coordinates;
准坐标下Poincaré-Chetaev方程的Lie对称性与守恒量
Lie Symmetries and Conserved Quantities of Poincaré-Chetaev Equations In Generalized Classical Mechanics;
广义经典力学中Poincaré-Chetaev方程的Lie对称性与守恒量
Lie symmetry and conserved quantity of Appell equation for a Chetaev’s type constrained mechanical system
Chetaev型约束力学系统Appell方程的Lie对称性与守恒量
Form invariance of Raitzin s canonical equations of holonomic nonconservative mechanical system;
完整非保守系统Raitzin正则方程的形式不变性和守恒量
The maintenance of a physical quantity, such as energy or mass, during a physical or chemical change.
守恒在物理或化学变化过程中能量或质量等物理数量的维持原状
Ac-cordling to the relationships of the erergy blalance and mose balance. We can also judge the relationship of the flow direction with the energy change.
根据能量平衡和质量守恒的关系,特别流动方向及能量变化关系。
Structural Equation and Mei Conserved Quantity of Mei Symmetry for Appell Equations in Chetaev Nonholonomic Systems
Chetaev型非完整系统Appell方程Mei对称性的结构方程和Mei守恒量
Structural equation and Mei conserved quantity of Mei symmetry for Appell equations in holonomic systems
完整系统Appell方程Mei对称性的结构方程和Mei守恒量
Improvement of Bottom Boundary Condition Expressions in 3D PE on the principle of energy conservation;
三维抛物方程方法中海底边界条件改进处理的能量守恒方法
Three symmetries and their conserved quantities of Tzénoff equations for holonomic systems;
完整系统Tznoff方程的三种对称性及其直接导致的守恒量