查询词典 transient period

As a transient inverse proposition of pipeline flow dynamics system identification, existent problems applied to CPM based on Real Time Transient Method are pointed out.

第二章给出了基本管内瞬变流动力学方程组，考虑到输送流体的性质，如粘性、可压缩性、状态相变等的不同，分别给出了相应的控制方程组。

The electro-reduction process of iodate on Pt electrode in acidic solution is studied by means of galvanostatic transient, potentiostatic transient and polarization curve methods.

本文研究了碘酸钾在酸性溶液中铂电极上电化学还原过程，实验结果表明与恒电流暂态和恒电位暂态的理论分析相符。

Energy function methods are based on transient kinetic and potential energy conservation principle during transient periods.

能量函数法是通过系统暂态过程中暂态动能和势能相互转化规律分析暂态稳定的。

Boundary polynomial point interpolation mesh-free method and boundary radial point interpolation mesh-free method were presented, based on polynomial basis and radial basis respectively for transient eddy current analysis, and their interpolation shape functions satisfy the Kronecker delta function and the essential boundary conditions can be directly imposed on the boundary nodes. An example on analyzing transient eddy current of a square metal column was set to prove the validity of the proposed methods, and a comparison on accuracy between BPPIM and BRPIM was analyzed as well.

运用多项式点插值法和径向基点插值法构造形函数，推导了适合于工程电磁场瞬态涡流问题的多项式基点插值边界无单元方法和径向基点播值边界无单元方法，这两种方法的空间插值形函数满足Kronecker delta条件，从而强加边界条件可以直接施加在边界点上，以金属长方柱的瞬态涡流分析作为数值算例，证实了两种方法的正确性和有效性，并对两种基类的点插值法进行了精度分析和比较。

A mathematical model that describes the transient flow is developed based on the conservation law of mass momentum and energy followed in the course of transient flow process of gasliquid phases.

根据气液瞬变流动过程中所遵循的质量、动量和能量守恒定律，建立了描述气液两相瞬变流动的数学模型。

Using wavelet analysis to realize single-phase grounding protection is easy to produce misjudgement and missed sanction and the method using magnitude and direction of transient component to realize single-phase protection needs calculate frequency and phase of transient component accurately.

采用小波分析实现单相接地保护容易产生误判和漏判现象，采用暂态分量的大小和方向实现单相接地保护的方法需要准确计算暂态分量的频率和相位。

Establish the steady-state and transient model using the three hydrodynamics equations (Continuity equation, Momentum equation and Energy equation). By comparing different state equation, it selects the BWRS state equation which is considered the most accurate state equation in current natural gas measurement. It calculates compression factor, density and other Thermal parameters based on BWRS state equation. In Numerical solution of the steady-state and transient model, compression factor, friction coefficient and all the other Thermal parameters are recalculated in each small time step to reduce the numerical calculation error.

在稳态模型的建立上，利用流体力学三大方程(连续性方程、运动方程和能量方程)，通过比较不同的状态方程选用了目前被认为最精确的用于天然气计量的BWRS状态方程，并以此方程为基础进行压缩因子、密度等热物性参数的计算；在稳态模型的求解上，选用容易计算，精度较高的标准型龙格—库塔(Runge-Kutta)法进行数值求解，并且在迭代过程的每一小步都重新计算燃气的压缩因子，摩阻系数等所有的计算参数，以减少数值计算的误差。

In order to solve the fault location problem, this paper analyzes the electric structure of automatic blocking and continuous power transmission line, investigating the transient characteristics of traveling waves generated by different fault in the lines on the basis of traveling wave theory. The results show that transient process of earth fault and short fault in neutral noneffective grounding systems produce aerial mode component of traveling waves with steadyparameters.

为了解决自闭/贯通线路故障自动定位问题，分析了自闭/贯通线路电气结构的特殊性，以行波理论为基础研究了接地故障和相间短路故障产生的暂态电压、电流行波特征，发现接地故障和相间短路故障都存在参数比较稳定的行波线模分量。

Normalized transient energy function ; transient stability assessment ; stability control

归一化能量函数；暂态稳定性；稳定控制

Abtract This paper presents researches into the on—line identification of dynamic parameters of synchronous generators and power systems. The work is mainly in the following two fields:Ⅰ On—line identification of transient and sub—transient parameters of synchronous generators A new corrected extended Kalman filter is developed, in which, a corrected term is added in the equation of the partial differentiation of the state variables with respect to the parameters.

本文研究了同步发电机和电力系统的动态参数的在线辨识，所做的工作主要在以下两个方面：一、同步发电机的暂态和次暂态参数的在线辨识本文提出了一个校正扩展卡尔曼滤波技术，在状态对参数的偏导方程中加入了一个校正项。

More direct, directer ; most direct, directest

径直的，笔直的

Do you know how to use a chain saw?

你知道如何使用链锯吗？