连续原理

Based on the continuity equation of groundwater and the normal velocity formula of free surface, taking element e as a subdomain R in the seepage flow domain R, according to variation principle, the finite element equation of seepage field can be obtained.

由地下水的连续方程和自由面的法向流速公式，把单元e作为渗流求解区域R上的一个子域ΔR，根据变分原理，得到岩土体渗流场有限元方程。

In addition, it was investigated how the frequency of the vibration exciter influenced the slip velocity.

本文介绍和研究了非谐和振动输送机的输送原理和动力学特性，从理论上分析了物料运动的基本特征，得到了物料连续滑动时的速度表达式。

In this paper the structure principle of GM(1, 1) was analyzed and the defect was pointed out that the traditional model only adapt to the data with exponential law, and only can fit for the monotonic data. The prediction is defected when there are two consecutive data unchanged, and 'a' is equal to 0.5 in prediction formula.

从传统GM(1，1)预测模型构造原理出发分析其存在的理论缺陷，此模型适用于具有较强指数规律的序列，只能描述单调变化过程，而且预测数据序列中出现连续两个相等值时将使得a等于0，会使预测数列发散致使预测失效。

The compound perforation technology adopts a new principle of secondary blasting and secondary fluidics.

复合射孔技术采用二次起爆、二次射流连续接力复合射孔新原理，能大幅度提高射孔深度和孔径，增大渗透面积，理想地沟通油气层段的储油渠道，达到油气田高产稳产的目的。

In this article two functional modes of the Fly-back Converter (Continuous Conduct Mode and Discontinuous Conduct Mode) are particularly analyzed, which include their characteristics, applications, the critical pattern of two functional modes is argued, both the exact boundary from the angle of circuit parameters is crystallized, at the same time, basic principle of PFC under the DCM mode is introduced, which settle theoretical basis for the subsequent design; by establishing the mathematic model of the converter, a further investigation of the configuration is made, qualitatively and quantitatively, analyzed to settle exactly theoretical basis for the subsequent emulation and the experimental parameter; from the angle of steady-state analysis, the transfer function of the system is deduced to establish dynamic small-signal state equation, emulating the system with the help of matlab, then according to the simulation result and the theory of PFC revise the system, lastly, we adopt the project which add a zero-pole compensator to the voltage loop, by this way, a satisfied system performance is gained and the PFC scheme is ensured successfully; finally, based on the previously-done work, we combining with the situation of specific design requirement, acquired the numerical value of each unit devices in this converter

详细分析了反激式变换器的两种工作状态，连续模式(Continuous Conduct Mode ，简称CCM)和断续模式(Discontinuous Conduct Mode，简称DCM)以及各自的特点、应用场合，论证了两种工作状态的临界模式，从电路参数的角度明确了二者的界限，同时还介绍了DCM模式下PFC的基本原理，为后面的设计奠定理论基础；通过对整个变换器系统建立准确的数学模型，对此变换器的电路结构做了进一步的研究，定性、定量地分析了变换器各部分的工作状态，为仿真和实验参数的确定以及电路参数的优化提供理论依据；从稳态分析的角度，为系统建立了动态小信号状态方程并推导出系统的传递函数，利用matlab对系统进行仿真，进而根据仿真结果以及PFC的相关理论对系统进行校正，采用在电压环加入零点—极点补偿器的设计方案，得到了满意的系统特性并且保证了PFC的顺利实现；最后，在前面所做工作的基础上，结合设计要求计算出此变换器系统中每个元器件的数值，利用Pspice对其进行了仿真、优化，然后根据仿真结果搭建了硬件电路。

Its working principles for the saws mounted on a frame on the saw blade, driven by the connecting rod with the saw frame for resumption of exercise often, at the same time through the movements transmission Continuous feed down for sport in order to achieve the sawing of stone processing.

其工作原理为装在锯框上的锯条在连杆的带动下随着锯框作往往复运动，同时通过升降传动机构连续向下作进给运动，从而实现对石材的锯切加工。

The topologies and operating principles of power supply and control system are introduced. Based on the continuous hereinbefore two-year operations of control system, control system characteristics are analyzed and control system saving investment/energy/resource specific effects are researched.

论文介绍了供电系统和控制系统的拓扑结构和工作原理，以控制系统连续运行两年多的实际状况为基础，分析了控制系统的特点，研究了采用该控制系统所带来的节约投资、节约能源资源的具体效果。

The improvement of the determined equipment was including:(1) adoption of the 635nm laser lamp-house whose homochromatism is good;(2) continual feeding device used the auto-feeding device based on the gravity potential energy theory;(3) absorbing pool is the 126μL micro- absorbing pool;(4) signal sensor used silicon electric eye;(5) the photocurrent signal was amplified by single route.

其中对检测装置的改进主要包括：(1)采用单色性良好的635nm的激光光源；(2)连续进样装置采用重力势能原理自动进样器；(3)吸收池采用126微升微量吸收池；(4)信号检测器采用硅光电池；(5)对光电流采用单路信号放大。

Single opening flat hot-press cannot be made in our country, so only analysing the working principle and summarizing the controll to density parameter.

我国目前正在开发连续平压法热压机，论文中配合这项工作，分析了有关参数控制的工作原理和实际应用。

Based on photo ionization principle,a gas sensor for hydrazine is designed to meet aerospace industry.

为满足航天工程的需求，根据光离子化原理，设计了一种响应快、精度高(1O )、便携、可连续测试的肼类监测传感器，可用于现场检测有机蒸气和气体。

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