本文对非稳定导热问题的有限元算法的能量守恒条件进行了讨论。
In this paper, energy conservation condition of finite element method (FEM) to the transient heat conduction problem have been discussed.
运输网络中有流量需求的转运结点不遵从流量守恒条件，也不能按源、汇及中间结点归类。
In transportation networks, a transshipment node with flow demands fails to conform to flow conservation, and can not be categorized to a source, a sink or an intermediate node.
即使初始条件十分光滑，双曲守恒律方程的解也可能出现间断。
The solutions of the Hyperbolic conservation laws might develop discontinuity even if the initial conditions are very smooth.
以流体力学三大守恒方程为基础，建立了等温和非等温条件下的燃气管网稳态和动态仿真理论模型。
The theoretical dynamic simulation models for stationary flow and transient flow under the isothermal and non-isothermal condition are set up based on the three conservation equations.
模型耦合了连续方程、动量方程和组分守恒方程，并将质子膜中的净水迁移通量作为边界条件之一来处理。
The model couples continuity equation, momentum equation and species conservation equations. Net water transport flux in the membrane is considered as a boundary condition.
提出了一种满足通量守恒的内边界耦合条件。
An internal coupling condition is given to make the conservation of flux satisfied.
由能量转换和守恒准则，导出压缩波阵面上的屈曲变形附加约束条件。
The criterion of energy transformation and conservation are used to derive the supplementary restraint condition of buckling deformation at the front of axial compression wave.
十分明显地给出了J积分守恒成立的几个必要条件。
The necessary conditions for J-integral conservation are also given.
在假定桩土接触面不产生滑移的条件下，确定在桩基础沉降过程中与能量守恒定律等效的位移协调方程，并在此基础上建立了一种新的单桩沉降计算方法。
Assuming no slippage occurred on the interface between pile and soil, an equivalent equation of displacement coordination is obtained to constitute a new method calculating settlement of single pile.
现在，如果在某些条件下，热泵所产生的热能超出了它所消耗的电能，能量守恒定律即已遭到质疑了吗？
Now, if under certain conditions a heat pump puts out more thermal energy than it consumes in electrical energy, has the law of energy conservation been challenged?
分析了机械能守恒的内涵及条件，对有的教材关于机械能守恒定律的表述提出了不同的见解。
This article analyses the meaning and prerequisite of conservation of mechanical energy, and poses different standpoints on describing the law of conservation of mechanical energy in some textbooks.
跨音速计算采用守恒型金位势方程，精确边界条件和AF 2高效有限差分迭代算法。
The transonic flow computation is performed by the use of conservative full-potential equation with exact boundary conditions and the efficient iteration scheme in finite difference method AF2.
系统地阐明机械能守恒定律无条件服从力学相对性原理。
It is explained that the law of conservation of mechanical energy obeys relativity principle of mechanics.
文章系统地阐明了机械能守恒定律无条件服从力学相对性原理，若总机械能在一个惯性系守恒，它就在所有惯性系守恒。
In this paper it is explained that the law of conservation of mechanical energy must Obey the relativity principle of mechanics.
从一道力学试题出发，讨论了机械能守恒的条件，并深入研究了守恒规律的协变性要求。
Some mistaken viewpoints were clarified, and requirements on covariability of conservation law were studied deeply.
得到形式不变性导致守恒量的条件以及守恒量的形式，并给出三种特殊情形下的推论。
The condition under which the form invariance can lead to a conserved quantity and the form of the conserved quantity were deduced, and three corollaries in special cases were given.
通过寻找积分因子来建立非完整非保守系统的守恒律，讨论了存在守恒定律的必要条件，并举例说明其应用。
A single character for use in integral invariant of nonholonomic conservation systems is proved and is subject to some conditions.
通过寻找积分因子来建立非完整非保守系统的守恒律，讨论了存在守恒定律的必要条件，并举例说明其应用。
A single character for use in integral invariant of nonholonomic conservation systems is proved and is subject to some conditions.
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