断面系数

Alignment Chart is commonly used to determine the effective length factor of prismatic member.

一般在实务设计中均匀断面构件求取有效长度系数K最普遍采用的方法就是利用准线图，但对於应用准线图求取非均匀断面构件之有效长度系数Kγ，则受到相当的限制，故工程单位也常因此在设计时舍弃非均匀断面构件的考量。

The surface pressure coefficient and the minimum pressure coefficient of a bridge deck section are important parameters of the bridge.

桥梁断面表面压力系数、最小压力系数等是桥梁断面重要的参数。

There are some characteristics in thermal test and calculation of boi ler burning these fuel s, such as the calculation of excess air coefficient for large content nitrogen. Fuel characteristic coefficient would be negative. Its necessary to convert fr o m heat content into volume content for the gas fuels calculation.

用这种燃料的锅炉，其热力试验和热力计算有若干特点，如高含氮量的气体燃料过量空气系数的算法，气体燃料特性系数出现负值，将给定燃料的热量份额换算成体积份额，试验中多个取样断面等。

Secondly, in the trapezoidal channel which profile is that the base width is 20cm, the depth of channel is 20cm, the slope coefficient 1.0, and U-shaped channel which profile is that the depth of channel is 40cm, the radius of bottom circular arc, the external dip angle α of abutment wall is 8°, the article does a series of experiment researches on many of cylinder measuring flumes, such as circular, pier shaped, elliptic and diamond cylinder flumes, and discusses the variance of discharge coefficient, submergence factor, backwater height, head loss and critical submergence degree for each of cylinder measuring flume. On this basis, the article optimizes the structure shape of the cylinder measuring flume further.

然后，在底宽为20cm、渠深为35cm、边坡系数为1.0的梯形断面渠道和渠深为40cm、底部圆弧半径为15cm、边墙外倾角α=8°的U形渠道上，对圆柱形、桥墩形、椭圆柱形和菱柱形等多种柱形量水槽进行一系列的试验研究，探讨各种形式柱形量水槽的流量系数、淹没系数、壅水高度、水头损失、临界淹没度等变化规律，在此基础上，对柱形量水槽的结构形式作进一步优化分析。

The results show that:(1) The mean drag and lift coefficients of box shape bridge deck section have considerable Reynolds number effect;(2) the ratio of width to height affects on Reynold.

在较大的雷诺数范围内测量了不同宽高比箱形桥梁断面的三分力系数，研究了三分力系数雷诺数效应以及宽高比对断面三分力系数雷诺数效应的影响。

The pattern of camber die-drawing are optimized. The physical innate character of drawing with camber die is analyzed thoroughly. For the first time, the periodical relation between the limit drawing coefficient and the large longitudinal stress in dangerous section is established. Furthermore, the rationale to judge limit deforming degree is developed. Then, the limit drawing coefficient of drawing with camber die is proposed. Based on the criterion that the large stress in flange is smaller than that of limit value, the formula of drawing with camber die without wrinkles is deduced.

对拉深凹模的型式进行了优化；深入地分析了曲面凹模拉深成形的物理本质，首次定量地确定了极限拉深系数与危险断面最大径向应力的关系，提出了判断极限变形程度的依据，分析了极限承载能力，建立了曲面凹模拉深的极限拉深系数的表达式；以凸缘切向最大压应力小于凸缘切向压应力临界值为准则，推导出了曲面凹模拉深不起皱的理论表达式。

Based on this principle, the proposed algorithms, such as fast search for transmission section based graph theory, fast search for flow transferring shortest path and the FTRF, are developed under Microsoft Visual C++ environment by using the Standard Template Library in order to simplify the development effort.

基于以上原理，用C++计算机编程语言编制了基于图论的输电断面快速搜索算法、基于图论的潮流转移最短路径快速搜索算法与基于直流潮流的分布系数法，并运用Visual C++计算机编程语言搭建了输电断面安全性保护的仿真平台。

Through assessment, it can be concluded that the water quality in Shuimo river valley of Urumqi was worse; the water quality did not improve in last three years, and this trend was not stable either in space or in time; the water quality was best in low water period but it's worse in flush water period and slack water period; in space the water quality in Tangcichangquan section was best , it's the second place in Qifangqiao section and Lianfengqiao section while it's worst in Miquanqiao section. According to the analysis, the trend of the water quality change of Shuimo river valley of the major pollutants, the method of Spearman was used in 1996 to 2002. It concluded, the pollutants did not have the remarkable trend of change in Tangcichangquan section,but BOD5 had very prominent raising trend in Qifangqiao section, so did BOD5, petroleum, and ammoniac nitrogen in Lianfengqiao, DO in Miquanqiao section in seven years.

根据秩相关系数法对水磨河流域1996 -2002 年主要污染物变化趋势分析，搪瓷厂泉断面作为流域的源头，各污染物七年里没有显著的上升或下降趋势；七纺桥断面的五日生化需氧量在七年中有很显著的升高趋势；联丰桥断面的五日生化需氧量、氨氮、石油类在七年里都有非常显著的升高趋势； DO 在米泉桥断面七年里也有非常显著的升高趋势，后三个断面接受了沿岸工矿企业的生产废水和周边居民的生活污水，水质明显变差，每个断面污染源不同，占主导地位的污染物也有差异。

By using CFD method, it was available to get not only the distribution of pressure, velocity and eddy air, but also the aerostatic force coefficients of a box girder section.

用计算流体力学方法模拟了桥梁跨中断面周围的风场特征，不仅能得到流场的压力、速度和涡旋的分布，还提取了箱梁断面的三分力系数。

An 1-D sediment mathematic model is developed in the second part. Techniques are suggested for some problems in calculations, such as the effective suspended load carrying capacity of the different bed material reach, the coefficient of suspended load carrying capacity, the recovering coefficient of the carrying capacity, the thickness of the mixed layer, the transport width of the bedload, bifurcation and confluence of main and branch channel, and the distribution of deposition and erosion along the cross section, etc. The numerical scheme of 1-D model is induced.

第二部分建立了一维泥沙数学模型，对计算中的几个关键问题提出了处理方法，如不同床沙组成河段的有效挟沙力、挟沙力系数、挟沙力的恢复饱和系数、床面混合层厚度、推移质输移带宽度、干支流入汇及分流问题、横断面冲淤形态及断面修正方法，导出了一维模型的差分格式。

In the negative and interrogative forms, of course, this is identical to the non-emphatic forms.

。但是，在否定句或疑问句里，这种带有"do"的方法表达的效果却没有什么强调的意思。

Go down on one's knees;kneel down

屈膝跪下。。。下跪祈祷