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normal depth     
相关语句
  正常水深
     This paper provided a computer method to calculate normal depth,critical water depth,conjugate depth of flow and bottom width of the channel in trapezoidal an rectangular channel,instead of hydraulic calculation diagram.
     对水力学中常用的4 种水力计算求解图,即:梯形及矩形断面渠道正常水深求解图、梯形及矩形断面渠道临界水深求解图、梯形及矩形断面渠道共轭水深求解图和梯形及矩形断面渠道底宽求解图用计算机实现。
短句来源
     A Direct Calculation Formula for Normal Depth in Open Trapezoidal Channel
     梯形明渠正常水深直接计算公式
短句来源
     Furthermore, this paper indicates that it is improper to use symbols σe and σo to represent the critical slope corresponding to the critical depth ye and normal depth y0 respectively,since if the discharge Q is a given value, σe and σo must be identical.
     文中还指明,在流量为给定值的条件下,相应于临界水深y_c的σ_c和相应于正常水深y_0的σ_0必然相等,而且从σ的定义就不应给以不同的符号.
短句来源
     Calculation of the hydraulic factor (such as normal depth and critical depth) is a common hydraulic problem in the designing of hydraulic structure.
     正常水深和临界水深等水力要素的计算 ,是水工建筑物设计中常见的水力学问题。
短句来源
     The normal depth plays an important role in hydraulic calculation.
     明渠恒定均匀流正常水深在水力计算中十分重要。
短句来源
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  法线深度
     (2) Given that to contours are known, for each point of particular to contour, first, calculate its time gradient, then find the point G in thc reverse direction of time gradient, whose true depth of the reflector equals the normal depth between the corrected point and thc reflector, and finally connect the G's, which are corresponding to the same to contour, with line scgments or spine curvcs. The Curves such generated are isobathes.
     (2)对沿已知to等值线上拾取的点,首先求出每个点的to时间梯度值,再沿负梯度方向寻找特征点G,G点处界面的真深度等于空校点到界面的法线深度,最后用直线或样条曲线把同一to值所对应的特征点连接起来,就可获取一条等深线。
短句来源
  “normal depth”译为未确定词的双语例句
     Results After 3 -6 months of followed-up, the average IOP was 20.78 mmHg, 65 eyes showed normal depth of anterior chamber and 21 eyes presented superficial anterior chamber.
     结果术后65眼前房正常,21眼前房略浅,随访3-6月平均眼压为20.78mmHg(1kPa=7.5mmHg)。
短句来源
     Iteration method for calculation of normal depth in trapezoidal open channel
     梯形明渠正常水深计算的迭代法
短句来源
     Comparison of methods predicting normal depth in compound channels
     复式河槽正常水深计算方法比较
短句来源
     By using the CDP gather,common-mid-point stacked time section or apparent depth section can directly be obtained,which can be converted into normal depth section.
     利用 CDP道集,可以直接获得共中心点叠加时间剖面或视深度剖面,由此可转换为法向深度剖面。
短句来源
     This paper discusses the ap- pearance of dipping plane interface and the formula of 3D migration for normal depth section and 3D migration in two steps.
     本文讨论了倾斜平界面的表现形态和法向深度剖面的三维偏移归位公式,同时研究了二步法三维偏移。
短句来源
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  normal depth
Method of determining the normal depth for flow in open channels
      
The normal depth calculations are applied at a number of discrete cross-sections with linear interpolation between to form a 3-dimensional water surface.
      
The stationary surface waves in a quasi-uniform flow approaching the critical conditions are shown to be possible only around a basic normal depth greater than critical.
      
This modification does not interfere with the normal depth indicating function of the pinger and is an inexpensive means of obtaining water temperature data.
      
No hips were produced on those plants for the normal depth.
      
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By adopting the critical depth ye and critical slope σ as the parameters for flow depth and bottom slope respectively,this paper presents the unified nondimensional computation method for 15 types of flow profiles in trapezoidal open channels with five classes of bottom slopes.Some new ideas for the characteristics of flow profiles have been explored by examples of computation and plotting of the generalized nondimensional φ(u) function.Furthermore, this paper indicates that it is improper to use symbols σe...

By adopting the critical depth ye and critical slope σ as the parameters for flow depth and bottom slope respectively,this paper presents the unified nondimensional computation method for 15 types of flow profiles in trapezoidal open channels with five classes of bottom slopes.Some new ideas for the characteristics of flow profiles have been explored by examples of computation and plotting of the generalized nondimensional φ(u) function.Furthermore, this paper indicates that it is improper to use symbols σe and σo to represent the critical slope corresponding to the critical depth ye and normal depth y0 respectively,since if the discharge Q is a given value, σe and σo must be identical. Usually, the hydraulic exponent for trapezoidal open channel is suitable to be represented by n and m, or it is not reasonable to use a single value n, besides the exception of shallow wide rectangular section.

本文采用临界水深y_c及临界坡降σ分别作为水深及底坡的参数,对五类坡底的梯形渠道内15种水面线,提出了统一的无尺度计算方法.通过对微分函数式的计算及作图举例,进一步阐明了水面线的一些特性. 文中还指明,在流量为给定值的条件下,相应于临界水深y_c的σ_c和相应于正常水深y_0的σ_0必然相等,而且从σ的定义就不应给以不同的符号.除了浅宽矩形断面的特例外,水力指数不是单一的n值而应区别为n及m二值.

By using the CDP gather,common-mid-point stacked time section or apparent depth section can directly be obtained,which can be converted into normal depth section.A subsurface interface may have different appearances on different seismic sections.This paper discusses the ap- pearance of dipping plane interface and the formula of 3D migration for normal depth section and 3D migration in two steps.Whether the two- step 3D envelope migration,two-step difraction migration or two-step 3D migration of CMP...

By using the CDP gather,common-mid-point stacked time section or apparent depth section can directly be obtained,which can be converted into normal depth section.A subsurface interface may have different appearances on different seismic sections.This paper discusses the ap- pearance of dipping plane interface and the formula of 3D migration for normal depth section and 3D migration in two steps.Whether the two- step 3D envelope migration,two-step difraction migration or two-step 3D migration of CMP stacked apparent depth section,the first step is always the migration along the line,and the second step is switching over the lines,with the switching angles being determined by the angle between the normal plane and perpendicular plane.The first step of the migration is performed within the perpendicular plane,and the second step of migration is the spatial migration of the side waves.

利用 CDP道集,可以直接获得共中心点叠加时间剖面或视深度剖面,由此可转换为法向深度剖面。一个地下界面在不同形式的地震剖面上将有不同的表现形态。本文讨论了倾斜平界面的表现形态和法向深度剖面的三维偏移归位公式,同时研究了二步法三维偏移。无论是二步法三维包络偏移、二步法绕射偏移,还是共中心点叠加视深度剖面的二步法三维偏移,它们的实现步骤的第一步是沿测线方向偏移,第二步则是绕测线转动,其转动角由法向平面和铅垂平面间的夹角决定。第一步偏移的实质是在铅垂平面内完成偏移归位,第二步偏移是在空间内完成侧面波的空间归位。

A sphere reflector can display different shapes on different kind of seismic sections. The upper semisphere and low semisphere show same hyperbolas on a normal depth section, the hyperbolic apex of the upper semisphere being above that of the low semisphere. A new 3-D migration method is put forward. According to this method, the 3-D migration of seismic data is accomplished by first migrating data in the line direction, then rotating them around the line. As for a sphere reflector on a normal time...

A sphere reflector can display different shapes on different kind of seismic sections. The upper semisphere and low semisphere show same hyperbolas on a normal depth section, the hyperbolic apex of the upper semisphere being above that of the low semisphere. A new 3-D migration method is put forward. According to this method, the 3-D migration of seismic data is accomplished by first migrating data in the line direction, then rotating them around the line. As for a sphere reflector on a normal time section, the normal two-way travel time t_o versus y is not a hyperbola. In so far as a known line, if x is a constant, t_o is minimum when y=0, and t_o trends toward maximum when y approachs ±∞. As for a sphere reflector on stacked depth section, the apparent depth versus y is a quadruplicate curve. The migration of stacked depth section need not use velocities in migration and time-depth conversi- on. The spatial shape of sphere reflector can be directly determined using this kind of seismic section.

地下球界面在各种地震剖面上具有不同的表现形态。上半球形和下半球形界面在法向深度剖面上都表现为一条形状相同的双曲线,但是前者双曲线的顶点位于后者的上方。于是可用一种新的三维偏移方法,即先沿测线方向偏移,再以测线为轴进行一次转动,完成侧面波的空间归位。球界面在法向时间剖面上,其法向双程旅行时间t_0和y的关系曲线不是双曲线。对于固定的测线说来,若x是常数,当y=0时,t_0取最小值;当y→±∞时,t_0取最大值。球界面在叠加深度剖面上,其视深度与y的关系是一条四次曲线。在叠加深度剖面上进行偏移归位,不需偏移速度和时深转换速度。利用此种剖面可以直接确定球界面的空间形态。

 
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