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A binary composite hypothesis test model with unknown and stochastic parameters was constructed.The sequential probability ratio test with the uniformly most powerful effect was provided for white Gaussian process.This novel method was used to detect the distant series of pipe mass flow difference of leakages produced in stationary and non-stationary operation situations, respectively.

建立了以泄漏信号的幅值为随机参量的二元复合假设检验模型，提出了具有一致最大功效的序列似然比检验方法，并进行了平稳观测序列强泄漏信号和非平稳观测序列弱泄漏信号的检测。

After a simple retrospect of the development and application of the heat pipe, the working elements and the history and the actual state of the investigation inside the thermosyphon, a numerical model based on the previous experimental and theoretical studies is developed to simulate and analyze the process of the flowage and heat transfer in the condensator of the two-phase closed thermosyphon.

本文首先简单回顾了热管的发展及应用情况，介绍了热虹吸管的工作机理及其内部凝结换热的研究历史和发展现状，然后在前人实验和理论研究的基础上提出了本文的研究方向，建立了一个数学模型，对两相闭式热虹吸管冷凝段的流动和传热过程进行了数值模拟和理论分析。

To determine the pipe size for condensing water is a common problem in the air conditioning system design.

针对中央空调系统中的冷凝水管径的正确选取是空调系统设计中普遍遇到的问题，提出了一种简明的计算方法，对于建设方在空调安装工程中降低初投资有一定的参考价值。

Wedge mechanism was adopted in piercing die to achieve side piercing, and the positioning of taper pipe depended upon the conical surface of blanking die itself.

在冲孔模中选用了带有楔角的斜楔机构来实现侧冲，并利用冲裁凹模自身的锥形面实现了锥形管的定位。

Or put it in your corncob pipe and smoke it, like everybody's favorite ornery, mumbling sailorman.

需要指出的是女主角奥利弗也许是第一个厌食症患者。

Frosty the Snowman and his famous corncob pipe couldn't escape the clutches of the advertising industry either; a whiskey maker in 1890 used Frosty's likeness to showcase an entirely different kind of holiday cheer.

雪人福斯弟和他著名的玉米棒子烟斗也脱离不了广告业的影响。1890年，一个威士忌酿造商使用福斯弟的形象来展示一个完全不同的节日餐。

But when he went back, he met a correctional officer and in order to avoid of knocking with him, he had to lean on a steam pipe and burned his back.

但是，当他返回来的时候，他遇到了一个狱警。为了避免撞上那个狱警，他不得不靠在一根蒸汽管上，结果把自己的背给烫伤了。

The differential pressure signal of slug flow was gathered in a downward inclined pipe, and the time series of liquid slug length was obtained by utilizing the cross correlation analysis.

通过采集下倾管中活塞流的差压信号，应用互相关法分析得到液塞长度时间序列。

According to this theory, hardware was made; the experiments showed different flow case brought different cross correlation function, when the distance of two sensors within 0.5～1. 5 diameter of the pipe, a sharp peak can be detected in the curve of cross correlation function, the frozen model is satisfied.

开展了互相关函数算法的研究，重点研究了极化相关算法，对该算法进行仿真研究；仿真结果与实验处理结果对比，得出只有将流动噪声信号量化为+1、-1时，极化相关算法可以得到准确的峰值位置。

The thesis can be divided into five parts as follows: First, the structural characteristics of finned-pipe evaporator are analyzed. After selecting suitable microelement controller, the heat-transfer and mass-transfer processes are analyzed for every microelement under the conditions of dryness, wetness and frostiness. Based on previous equations, some parameters of frostiness are confirmed and the frost-growing model is set up under frost condition. Some hypotheses are postulated and with the help of the equation of mass-conservation, energy-conservation and momentum-conservation, the evaporation model which fits in the dynamic simulation is built, which set a solid foundation for system simulation. Second, the starting and stopping behaviors under disturbed condition are analyzed and calculated by using the dynamic concentrative parameter model, which gives some advice to better prescribe refrigeration system and set theoretic foundation for carrying out automatic control of refrigeration system. Third, the normal running process is analyzed and calculated by means of rational matching theory, which gives some advice on how to better understand the parameter change under steady state and the affection of inlet-parameter on evaporator. Fourth, the simulation software with dynamic characteristic is designed, which can be applied to calculate thernio-parameter of cryogen, air humidity and frost thickness under different initial and boundary conditions, and to carry out dynamic simulation under conditions of dryness, wetness and frostiness, at the same time, to achieve detection and simulation at any stage from starting to stopping.

本文的主要内容如下：1对翅片管蒸发器结构特点进行分析，选取适当的微元控制体，就干、湿和霜工况下对每个微元分别进行传热传质分析，基于经验关系式确定霜的有关参数，对于霜工况下的霜生长建立模型，经适当假设，运用质量守恒、能量守恒和动量守恒方程建立适合动态仿真的蒸发器数学模型，为系统仿真奠定基础； 2对蒸发在大扰动下的开、停机过程，运用动态集中参数模型进行分析和计算，为更好地描述制冷系统运行的全过程奠定基础，同时也为制冷系统实现自动控制提供一定的理论基础； 3对蒸发器正常运行过程，运用动态分布参数和参数间定量耦合的观点来分析和计算，为更好地了解稳态工况下各点参数的变化情况及各入口参数对蒸发器动态特性的影响即蒸发器性能对各参数变化的敏感性； 4编写翅片管蒸发器动态特性仿真计算程序，可以计算不同边界条件和初始条件下的制冷剂热力参数、空气温湿度和霜厚度分布场，实现对翅片管蒸发器在干、湿和霜工况下的动态仿真。

Finally, according to market conditions and market products this article paper analyzes the trends in the development of camera technology, and designs a color night vision camera.

最后根据市场情况和市面上产品的情况分析了摄像机技术的发展趋势，并设计了一款彩色夜视摄像机。

Only person height weeds and the fierce looks stone idles were there.

只有半人深的荒草和龇牙咧嘴的神像。