管道

Pipeline stress calculation and Euler formula, as well as the theory of forced convection heat transfer in tube, are used to solve the problem of large deformation and uneven distribution of stress which occurred in thermal pipeline of a power plant.

通过应用管道应力计算方法、欧拉公式以及管内强制对流换热等传热学理论，解决了某电厂热力管道运行中出现的变形过大、应力分布不均的问题。

The calculated results coincide well with the model experiment, which assure the exaction of FEA model.

此计算模型能够准确地计算温度荷载对管道缝宽与钢材应力的影响，有限元计算结果与三峡电站压力管道1：2模型试验吻合较好，证实了此有限元计算模型的可靠性

1 The laboratory exhaust system includes exhaust duct works, exhaust fan, laboratory fume hood exhaust, laboratory canopy hood and cabinets needed venting.

实验室排气系统包括排气管路、排气风机、实验室通风柜管道、实验室排风罩和特殊存储柜的排气管道。

Metal bellows are fitted in the pipe system as well as between the turbocharger and the exhaust discharge pipe system.

金属风箱是装在管道系统中，同样也在涡轮增压器与尾气排放管道系统之间。

A leakage point positioning systerm is developed,which is based on correlation analysis of fast Fourier transformation for locationing the leakage in the pipe.

针对管道漏点定位问题，研制出了一套基于快速傅立叶变换的相关分析法管道泄漏点定位系统。

Ferroconcrete circle form is the main pressure pipelines type mostly adopted in built power stations from 1970"s to 1980"s in our country. During long running process, there are many factors such as design faults, bad materials, manufacturing deficiencies, improper constructions, environment factors, function changed, load increase, material aging, damage and so on which lead to all kinds of problems containing deficiency, crack, lack of strength and structure destroyed .

在我国七八十年代建成的电站压力管道，大多采用的是钢筋混凝土圆形结构，在长期运行过程中由于其设计失误、材质恶劣、制作偏差、施工不当、环境因素、功能改变和荷载增加等因素及材质本身的老化、损害等而导致钢筋混凝土压力管道产生各种各样的缺陷、损伤、裂缝过大、承载力不足或结构破坏等问题。

The detected leakage signal can be decomposed into a sum of finite intrinsic mode functions by EMD, some of IMFs embracing typical AE characteristic can be selected to be reconstructed. Thus, noise interference can be eliminated. The reconstructed signals are analyzed and their cross-correlation parameter is calculated.

该信号分析方法将管道泄漏产生的声发射信号通过EMD分解为多个平稳的固有模态函数之和，选择包含声发射特征的若干IMF分量进行重构，可以提取到管道泄漏声发射信号的本质特征，消除噪声信号的干扰。

In the project of Dongfang-Yangpu-Haikou Long Distance Transportation Pipeline Crossing through Changhua River, the construction technique of launch way with slide boards is utilized, that is, the pulley block fixed on opposite bank tows the pipeline directly. The pulley block of a 32t low speed windlass successfully towed the integral pipeline section through the river.

在海南东方－洋浦－海口输气管道工程的昌化江穿越施工中，采用了发送道滑板施工技术：滑轮组过江直接牵引管道，32t慢速卷扬机牵引滑轮组将管道整体牵引过江，牵引穿越一次成功。

The system consists of mobile pipes and pipe gate on the composition of a number of configurations, including the water hose and opening the outlet with adjustable parts, with the outlet and from the gate, pressure ring, window gates and a four-part group flashboard Cheng, gate spacing and specifications can be ditching the field and the flow configuration space.

该系统由移动管道和管道上配置的多个闸门组成，包括输水软管和开度可调节的配水口等部分，配水口又由闸口、压环、闸窗和闸板四个部分组成，闸门间距及规格可根据田间开沟间距及所需流量配置。

Knife-type valve: Features 1, ultra-structure length, saving materials, piping systems can greatly reduce the overall weight of 2, the effective space occupied by small, can effectively support the strength of pipelines can reduce the possibility of pipeline vibration 3, flashboard selected austenitic stainless steel, Corrosion performance greatly improved, which can effectively prevent the corrosion caused by gate leakage sealing diarrhea 4, on the use of flexible packing seal PTFE, sealing reliable, flexible and lightweight 5, the gate with Knife function, can effectively break the gates of all types of media objects

刀型闸阀：产品特点 1、超短结构长度，节省材料，可使管路系统整体重量大大减轻 2、占用有效空间小，能有效支持管道的强度，可减少管道振动的可能性 3、闸板选用奥氏体不锈钢，耐腐性能大大提高，可有效的防止由于闸板腐蚀引起的密封泻漏 4、上密封填料采用柔性 PTFE ，密封可靠、操作轻便灵活 5、闸板具有闸刀的功能，能有效的闸断介质中各类杂物

The basic concept of FOP can be summarized as to further optimize effective prescription according to the standard of curative effects and with the aid of modern science and technology and theories of traditional Chinese medicine.

其基本内涵可概括为：以确有疗效的中药复方为研究对象，以现代科学技术和传统中医药理论为技术支持，以该复方所治病证的药效响应为评价标准，以优化重组疗效更优的新复方为研究目的。

Ever since our world has been a world, native forests have been indiscriminately exploited by man.

自从我们的世界一直是世界原生森林被任意剥削人。