简便

A general Godunov finite difference schemes-WENO schemes which had fifth-order accuracy was used to make a numerical calculation for 2-dimensional axis symmetrical laser-supported plasma flow field under laser ablated solid target and laser ablated propulsion efficiency parameters(mechanical coupling coefficient etc.) was obtained by the simulation.The models of the calculation of ionization degree of plasma and the interaction between laser beam and plasma and the simplified eos of plasma were considered in the simulation.

采用针对高温气体电离度的一种近似计算方法，以及具有五阶精度的广义Godunov差分格式-加权本质无振荡格式WENO(weighted essentially non-oscillatory schemes)，给出了高温气体状态方程的简便描述，并考虑激光与等离子体的相互作用，模拟了强激光与固体靶相互作用时激光支持靶面等离子体流场的动态物理过程，并给出了不同参数条件下激光烧蚀固体靶的推进效应参数。

The problem of PI controller design for the multi-input and multi-output system is transformed to that of static output feedback controller design via the new state variable. As to the problem of the static output feedback, a new LMI-based sufficient condition of the controller is presented in this thesis. We can gain the multivariable PI controllers just solving one LMI inequality. The numerical example is provided to illustrate the proposed design approach. 3.The H_∞ robust control is able to solve the multivariable problem, also the control problem characteristic of the modeling error, parameters uncertainties and unknown perturbation, Its application research in the power electronics is beginning now. Considering the characteristics of the PWM DC-DC converters, a multivariable PI controllers which is based on H_∞ Performance Index is designed.

通过构造新的状态变量，可以将多输入多输出系统的PI控制器设计问题转化为静态输出反馈控制问题，利用后者的成熟理论来设计控制器；本文在问题转化后采用更为简便的算法，只需通过求解一个LMI不等式，就能求取基于H_∞性能指标的多变量PI控制器参数，实例验证了算法的有效性。3.H_∞鲁棒控制具有处理多变量问题的能力，可解决具有建模误差、参数不确定和干扰未知系统的控制问题；它在电力电子学中的应用研究刚刚开始。

The numerical results show this method is simple and effective.

计算结果表明：该方法简便有效，在工程中具有十分广阔的应用前景。

The numerical results show that the proposed method is accurate, convenient and efficient.

所得结果表明，该方法是一种精度较高、简便有效的计算方法。

Continuous wave of condensation technique is more adaptable to root canal obturation.

连续波充填技术临床操作简便有效，操作时间短。

Old-time diners were built in a factory and transported to their place of business.

老式的简便餐厅都是建在工厂里的并且可以方便的送到他们工作的地方。

HPLC was used to determinate the capsaicinoids content of paprika oleoresin directly.

采用HPLC法对红辣椒油树脂中辣椒素的含量进行直接测定，方法简便，结果准确。

The detection limit had been estimated as 1.0×10^(-8)molL^(-1). This method can be used for the determination of lute olin with satisfactory results.

本法操作简单、快速、灵敏、准确，可为木犀草素药物质量的控制和检测提供一种简便的新方法。

Objective: To explore the economical,convenient,effective method for neonatal omphalitis treatment.

目的：探讨新生儿脐炎的简便、经济、有效的治疗方法。

Objective: To explore the economical, convenient,effective method for neonatal omphalitis treatment .

脐炎 摘要：目的：探讨新生儿脐炎的简便、经济、有效的治疗方法。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。