查询词典 unsteady

Main 3-D characteristics are taken into account, and the theory gives a detailed describe to the calculation of the unsteady components of hydrofoil lift and other important problems.

该理论在二维理论基础之上计入了主要的三维特性，并对非定常水翼水动力计算等重要问题予以了详尽的阐述。

In this paper, a high order accuracy difference method is presented for solving unsteady convection diffusion equation by using Implicit Perturbation Finite Difference scheme.

本文利用摄动差分思想，对定常对流扩散方程中的空间微商系数进行摄动展开，展开幂级数系数通过消去摄动格式修正微分方程的截断误差项求出，由此获得方程的隐式摄动差分格式，将此方法应用于非定常对流扩散方程，并加以修正，得到该方程的修正隐式摄动差分格式。

A new graph theory methodology is presented for analysis of the unsteady flows in open channel network, including the structure and characteristics of the incidence matrix A, continuity equation and energy equation with matrix A.

提出了新的渠网非恒定流图论原理，包括适应渠网非恒定流特征的节支关联矩阵A的构建方法及性质分析，基于A的节点连续性矩阵方程和节点水深矩阵方程等。

A finite element analysis is presented based on the Lagrangian description for unsteady incompressible fluid flow problems with a free surface.

介绍了拉格朗日描述下的非定常不可压缩带自由面流体运动的有限元分析。

The instantaneous velocity field can be measured by using PIV technique. This is important to researching the unsteady flow within turbomachinery.

实践表明，该实验台能够满足本文的实验要求，而且为以后进一步的实验研究留有充分的余地。

Formulations of the lift and the thrust are derived based on the three-dimensional unsteady vortex lattice method, and the effect on instantaneous shape velocity is analyzed.

推导了新的基于空间非定常涡格法的扑翼飞行器升力和推力的计算公式，然后分析了瞬时形状速度对它们的影响。

For a soil or rock of water - lacked , a heat transfer theoretical model is developed , which is a steady or unsteady , the results show that reservoir temperature , thermal diffusion coefficient , inlet temperature , flow rate of and run time of ground source heat pumps have an effect directly on heat transfer process of dhe . it can deduce that intermit running is favorable for this type of soils and rocks

对于贫含水地下岩土层建立了稳态与非稳态传热的理论模型，分析结果表明，岩土层的热储温度、导温系数、埋地换热器进水温度、流量以及地源热泵系统的运行时间或开停机比，都对埋地换热器的传热过程产生直接影响，可以推断，对于该类型岩土层的地源热泵系统，采用间歇运行将是有利的。

Second, a 3D unsteady-state numerical model of heat transfer in laser circular cutting of pipe was set up for the first time, and the kerf width, the cut front profile, the temperature field and the heat affected zone were calculated by using the model.

其次，首次建立了管材激光圆周切割传热过程的三维非稳态温度场计算模型，并计算了不同管径和切割速度条件下的切缝宽度、切割前沿及其相邻基材的温度场和热影响区大小。

The characteristic of solute distribution at the S/L interface is a function of time for an unsteady solidification process.

在讨论一般非平衡凝固过程的溶质传输时，界面局部平衡假设应予以修正。

This paper establishes mathematical models of unsteady and Non-Darcy low speed flow through the porous media and the double porous medium, and has obtained their solutions in an infinite reservoir through Laplace transformation, and their long time asymptotic solutions has been worked out, solutions on a bounded reservoir has also obtained through finite integral transformation and Laplace transformation.

从现场上各种水淹的实际资料来看，同一水动力的非均质油层系统中，渗透率相对较高的部分水洗之后，渗透率相对较低部分的油层却可以原封不动。而且，其渗透率可达达西级，含油饱和度可达80％以上。相对流动比(即同一水动力的非均质油层系统中，小层平均渗透率的最大值与其中不流动部分的小层平均渗透率的最大值相比)的比值在各种油层的生产实例中十分相近。一般的分布范围为3—7，常见的为4—6。实验室结果和生产实践基本相同。简单的注水和压裂对这一比值几乎无影响。

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了