管道中的

According to induced response method, the expression in frequency domain of pressure response at the end of pipeline is derived using impulse response method and convolution theorem. The expression indicates that that transfer function is only related to the characteristics of pipeline system and the Fourier transform of flow variable only depends on the operating characteristics, and the pressure response in frequency domain is linear with the Fourier transform of flow variable.

基于激励响应法，应用脉冲响应方法和卷积定理得出了管道末端压力响应在频域中的表达式，此式表明：传递函数只与系统的特性相关，流量变量的傅立叶变换只与操作特性相关，且压力频域响应与流量变量的傅立叶变换为线形关系，根据此式在理论上能够得到管道泄漏点的重要信息。

According to characteristics of submarine pipeline data, all information is divided into two kinds, geo-spatial data and attribute data. Using identifier to connect two kinds of data, the problem of storing geo-spatial data in relational database is solved.

根据海底管道的数据特点，将海底管道的描述信息分为空间信息和属性信息两类，解决空间信息在关系数据库中的存储问题，并通过标识实现空间信息与属性信息的关联。

The grid type energy dissipator process, commonly used in water conservancy project, was adopted in the design of sewerage system.

山地城市的地形坡度较大，排水管道系统的上、下端落差大，因而需设置大量的跌水、消能构筑物，为此，在城市排水管道工程设计中引入了在水利工程上常用的格栅式消能池工艺，并介绍了格栅式消能池的工艺构造、消能机理及设计计算方法。

The filaments, still in the liquid form, fall by gravity through the spinning cell, and a verticle tube through which a current of air or inert gas passes at a temperature as high as 400 c.

依然处于液状的长丝，靠自重通过纺丝仓，然后经过一个竖直的管道，在管道中流过温度达400℃的空气流或惰性气体气流。

The relation between the result accuracy and the element number of the system is studied and shows the minimal element number to ensure the response result accuracy is determined by the excitation frequency and the modal modes of the system.

研究指出，保证计算结果精确性的最小网格划分数目与激励频率及管道系统的振动模态有很大关系，即由对管系响应贡献较大的最高阶模态振型决定，这一研究成果对实际管道系统振动响应计算中时间与空间节点的划分提供了理论依据。

So it is urgent to find a method todetect underground pipeline and its branches conveniently. In order to solve the above problem, based on the fact that the heated petroleumradiates heat to the soil and then the especial temperature distribution will be formedon the ground, this paper reach out a method creatively using the infrared imaging todetect the underground pipeline.

本文的研究内容正是从这一实际需求出发，根据石油在管道中传输时因加热而向周围土壤辐射红外能量，进而在管道上方地表形成特殊的温场分布的特点，创造性地提出了用红外热成像技术来检测埋地输油管道方法，并重点完成了几下几方面工作。

Under the loads of upside soil and vehicles, those pipelines buried in soft soil are prone to produce longitudinal bending and overlarge deformation, these two influences will cause pipelines to lose stability and to produce breaks in the weakest parts, which will lead to leakage and even blowout. These accidents will influence normal operation of national economy and peoples daily lives, and bring serious economic and social damages.

埋在软土地基中的管道，受上部覆土荷载及车辆荷载的作用，容易产生纵向弯曲以及过大的变形，致使管道失稳，在最薄弱处产生破裂而导致渗漏甚至爆管事故，影响国民经济和日常生活的正常进行，会带来严重的经济和社会损失。

Special cutting device separating the sewage in the wreckage of objects organized, sanitary napkins, toilet paper and other similar residues were separated and chopped to avoid pipeline plugging, no additional land, to sewage, through 80mm or 100mm diameter exhaust pipes size small, simple and beautiful appearance, with clean body, and hand-wash basins, shower basins, such as connectivity, does not affect the overall aesthetic bathroom, no smell leak, no water leakage, automatic operation, no need for manual operation.

特制切割分离装置对污水中的物体组织残骸、卫生巾、手纸和其他相似的残渣进行分离和切碎，避免管道堵塞、不增加任何占地，将污水通过80mm或100mm口径的排水管道排出，体积小巧，外观简洁美观，可以与洁身器、洗手盆、淋浴盆等连接，不影响浴室整体美观，无异味泄出，不发生污水渗漏，自动控制运行，无须人工操作。

Based on the numerical calculation and the analysis of the calculated results, a solution to alleviate the harm of the slurry waterhammer in the pipeline was proposed, i.e.,installing a surge tank at the highest point of the pipeline and increasing the moment of inertia of the water pump motor.

通过对数值计算结果的分析，提出了在管道顶端最高点设置调压井和增大电机飞轮力矩的方法来降低管道中浆体水击的危害。

Wet air is pumped from the surface through intake pipes into low-pressure cavities in the pebble beds created by sun-heated suction pipes.

湿空气是泵浦从表面通过进水口管道进入低气压洞穴中的卵石床所造成的太阳炽热的吸力管道。

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。