Control valve is a pipe attachment, which is used to change the channel cross-section and flow direction, the control flow of a medium transport device.
调节阀是一种管路附件，它是用来改变通路断面和介质流动方向，控制输送介质流动的一种装置。
Compared with other types of open channel cross-section, the cubic parabola shape open channel is one of the open channels which convey water more efficiently.
与其他形式断面渠道的比较结果表明，立方抛物线形断面渠道也是一种水力较优的输水渠道。
This paper presents the design of a new degree of freedom-channel with variable cross-section design.
本文提出了一种新的设计自由度——变截面通道设计方法。
Channel section steel is a kind of economic cross section steel, the products are widely used in automobile, aviation, light industry, machinery manufacture and construction areas.
槽钢是一种经济断面型材，广泛应用于汽车、航空、轻工、机械制造以及建筑等各个行业。
When the upper state population is not reversed, the channel with greater ratio of emission and absorption cross-section has greater competitive advantage.
当上能级粒子数处于未反转分布态时，具有较大的发射截面与吸收截面比值的波长信道拥有相对较大的增益竞争优势。
The experiment has studied the heat transfer characteristic inside U shaped variable cross-section channels with different rib pitches, The channel is the middle part of a gas turbine blade.
本实验选取航空发动机涡轮叶片中段内部冷却通道为研究对象，对不同肋间距的横肋变截面U型通道的换热特性进行了研究。
The size and position of the cross section of support beam, the opening direction of beam channel.
表面处理形式、状态；支撑梁的截面尺寸和位置，槽钢的开口方向。
The design theory, function, application and secondary use is mentioned simply, specially, its application in the design of channel cross section is mentioned.
本文简述了数字化断面的设计原理、功能、应用及二次使用，特别是其在水利上河道断面设计中的应用。
A performance prediction model is established in this paper which taking ac count into gas compressibility and the change of cross section area of flow channel.
本文建立的性能预测模型考虑了气相的可压缩性和沿流道的截面面积的变化，介绍了数值模拟的方法和步骤。
The calculation methods for overbank flow in straight channel and meandering channel with compound cross section are studied respectively.
对复式顺直河道和复式游荡型河道中漫滩洪水的计算方法进行了研究。
The design method of U-shaped channel optimal hydraulic cross section and the calculation equation used to determine the bottom circle's radius of U-shaped channel is proposed in this paper.
提出了U形渠道水力最佳断面的设计方法，并给出了确定U形渠道水力最佳断面底弧半径的计算公式。
Under the assumptions of the triangular cross section channel and the uniform stable flow, an analytical solution of MEIFR is deduced.
假设河道呈三角形断面和均匀流，得到湿周法的解析解表达式。
The model is applied to forecast the variation process of main stream direction, cross section and channel slope of a conceptualized curved river under the erosion of clear water.
应用建立的水沙数学模型以及河岸冲刷模型，模拟了一概化弯道在持续清水冲刷下的主流线位置、断面形态、主槽比降的变化过程，模拟结果符合弯道演变规律。
There are still some shortages in the design of U-shaped cross section channel with concrete lining.
明渠衬砌U形断面渠道设计中仍存在一定的缺陷。
The experiment research find that variable cross-section channel has a certain impact on the stability of the thruster's discharge;
实验研究发现变截面通道影响推力器的放电稳定性；
The entry convergent flow pattern was observed with flow visualization technique when the resin melt flowed through a die featuring abrupt contraction in cross-section of channel and axial symmetry.
应用毛细管流变仪测量了在接近实际挤出工艺条件下低密度聚乙烯熔体的流变性质； 应用流动可视化技术，观测了试样熔体流经突然收缩的轴对称口模时的入口收敛流型。
The bar steels adopt I steels, Angle steels or channel steels, or adopt steel plates which are welded into a cross shaped section.
型钢选用工字钢、角钢或槽钢，或者采用钢板焊接为“十”字型截面。
The riverbed form in different periods from 1958 to 2005 of the South Channel and the South-North-Passage bifurcation and the cross-section transformation between U-shape and W-shape are analyzed.
分析了1958~2005年不同时期长江口南港及南北槽分汊口的河床形态特征，以及河床U形断面与W形断面的相互转化。
The results reveal that the velocity of the center of cross section is trapeziform, the velocity of about narrow side of the channel is lower, but the velocity of center is high;
研究表明，窄缝内横截面中心线上的速度呈梯形分布，窄边附近流速较低，中间高；宽边完全加热时，流体不足以带出加热板发出的热量，使得角部出现热集中现象；
The results reveal that the velocity of the center of cross section is trapeziform, the velocity of about narrow side of the channel is lower, but the velocity of center is high;
研究表明，窄缝内横截面中心线上的速度呈梯形分布，窄边附近流速较低，中间高；宽边完全加热时，流体不足以带出加热板发出的热量，使得角部出现热集中现象；
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