查询词典 alternating direction method

After studying the theory of combined signal processing with acoustic pressure and particle velocity, a method of direction estimation underwater, which is based on intensity measurement using an acoustic vector sensor, is presented. In the low frequency field with kinds of line-spectra, azimuth angle estimation is achieved based on the probability density statistics and bar graph approach. It can preferably resolve the problem of left/right bearing resolution and estimate the direction of space.

为了对水下目标进行定位，基于声压与振速联合信号处理的理论，研究了复声强法对水下目标信号的定向技术，并使用概率统计和直方图的理论对目标的方位角和俯仰角值进行了估计，在线谱分量存在的低频段对估计角度进行了概率统计，较好地解决了左右舷的分辨问题，实现目标的全空间无模糊定向。

In this paper it is given a more effective formula about the direction angle of the main plane in the plane stress state.2. To introduce the principle and method for drawing 3-D graph with the compuer and for checking up with the computer cursor,to give outline of expressions of 3-D curve,outline of cursor meterage of well depth,well deflection angle and direction angle at any section.

介绍了在实践中总结出的计算机绘制与光标检测3维图形的原理和方法，给出了3维动态图形到屏幕坐标的变换式、各测点的平滑连接方法以及描绘与检测井眼轨迹曲线的典型应用，实现了空间井眼轨迹曲线的任意旋转、投影和给出了任一井段的井深、井斜角和方位角的光标检测软件。

With the sub-pixel calculation,the fingerprint periodicity matrix and normal direction image can be gotten accurately and the sharp corner of fingerprint image center line in existing direction image method can be avoided,the AFIS performance also can be improved significantly.

通过亚像素的计算，可以精确地输出指纹的周期矩阵和法向图，避免了方向图算法中无法计算指纹中心线急转弯的问题，使整个AFIS的性能得到了很大的提高。

The bias of cyclic periodogram with ssinc window is analyzed in both spectrum frequency direction and cycle frequency direction, and that the TA cyclic spectrum estimation is unbiased is analyzed. The average method of cyclic periodogram is also derived in terms of STFT.

论文中通过分析加ssinc窗的循环周期图在谱频率方向和循环频率方向的偏差，表明TA循环谱估计是无偏估计，并根据STFT方法，推导了使方差得以减小的平均循环周期图方法。

Then depended on the Gradient Projection Method, the gradient projection direction is deduced. The gradient direction is the basement for sensitivity analysis.

接着，根据投影梯度法，推导出了投影梯度方向，该方向是灵敏度分析的基础。

This method can acurately simulate the flow direction in gird near river, and can keep the direction of waterflow from crossing the watershed of subdrainage area.

这样既可以较精确地反映出河道附近格网的水流方向，又可以让各个子流域内的汇流方向和水流方向不会跨越子流域的分水岭。

N this paper.a method for calculating the natural frequency and eigenmode of power turbine's tower.the wind effect and displacement response of the tower along wind direction. and the wind effect and displacement response produced by the tail vortex across wind direction is introduced. The response caused by wind turbine's rotation is discussed.

阐述了风力机塔架的固有频率和固有振型、顺风向下塔架的风效应和位移响应、横风向塔架在尾涡激励下的风效应和位移响应以及由风轮旋转而引起的位移响应。

A method of keying a radio carrier for transmitting binary data or teletypewriter signals, which consists of shifting the carrier frequency in one direction for a marking signal and in the opposite direction for a spacing signal.

对无线载波频率进行键控用于传输二进制数据或电传打字机信号的一种方法。这种方法是在某一方向上对载波频率进行漂移用于传输标记信号，而在相反方向上对载波频率进行漂移用于传输空格信号。

Exploiting the high temperature fluxion character of grate cooler clinker, the filling state during entire colling process can be determined. Then impact on the control model can be analyzed introducing by the fluctuating of the clinker's thinkness and diameter. a modeling method with three dimensions division is proposed. The Longbeige step-changing dichotomy is used to optimize the division time toward z direction. Then the mass balance and heat balance analysis for every cell derived from clinker's three dimentions division is presented. Finally, the clinker temperature field's unitary control model with deducing in x, y, z direction separately is constructed.

从篦冷机熟料的高温流动特性入手，确定熟料在流动过程中的填充状态，分析熟料厚度与颗粒直径波动对控制模型影响，提出对篦冷机熟料采用三维分割的思想进行建模；设计了基于龙贝格变步长的三维分割算法，对z方向的分割次数进行优化；分析流动状态下熟料微元的质量平衡与热平衡关系，分别沿x、y、z方向递推，建立篦冷机熟料整体控制模型。

According to the geological features and the grade data of ore-forming elements,which are analysed systematically by using Yang Chizong filter method,in several deposits of Hu-Bi-type copper deposit,we propose that such orefield is controlled compositely by folds-thrust faults of NE direction and faults of NW direction,and that ore pillars are formed in the intersection area of structures mentioned above.

应用杨赤中滤波法系统分析了胡篦型铜矿几个矿床成矿元素的品位资料，结合矿床地质特征研究，认为该类矿床不仅受NE向褶皱冲断构造控制，而且还受NW向断裂构造复合控制，在其交汇部位形成矿柱。

Molecular Distillation is a kind of high vacuum distillation method, which is suitable for the separation of high boiling, heat sensitivity and viscidity products.

分子蒸馏技术是一种在高真空条件下进行的连续蒸馏过程，适合于分离高沸点、热敏性及具有生物活性的混合物。

They are to the Noughties what yuppies were to the Eighties .

那在六十年代是时髦的，但在八十年代肯定是过时了