使用相匹配滤波技术提取基阶面波振型的相位，然后再利用时变滤波进行振幅谱校正，以此分离出基阶振型面波信号。
Phase-matched filter is applied to extract phase of fundamental surface wave, and then time-variable filter is used to correct amplitude spectrum in order to isolate fundamental mode signs.
数值模拟采用二阶NND格式求解二维N S方程，计算得到的壁面压强分布与实验结果吻合较好。
Second order NND scheme was adopted. The pressure distributions of numerical results agree well with the experimental results.
另一方面讨论了随机利率下的一些离散年金、连续年金和连续生存年金现值随机变量的一阶和二阶原点矩及其方差。
On the other hand, the moment, the second moment and variance of the present value random variables about some life annuities and annuities with random interest rate are gotten.
液面反射波信号主要在硬件方面采用双通道二阶有源低通滤波，功图信号则在软件方面采用数字滤波算法。
Reflected wave signal is processed by double channels two-order low-pass active filtering in hardware, and indicator diagram signal is processed by digital filtering in software.
在此基础上，用冻结势方法计算了该超晶格系统的价带带阶；用四面体方法计算了该系统的联合态密度。
The valence-band offsets of such systems are calculated by frozen potential method and their Joint density of states has been computed by tetrahedron method.
利用WDM94模型编制了华北地区不同阶次的大地水准面起伏图，讨论了大地水准面起伏和该地区构造横向不均匀性的关系。
The geoid undulation diagrams in different degrees are mapped by WDM94 model. The relationship between the geoid undulation and the lateral inhomogeneity of regional tectonics is discussed.
一般齿轮齿形曲线在一点邻域的高阶阶戴劳级数展开后，会发现齿面啮合点邻域间隙为2阶无穷小。
The common gear tooth profile curve launches after neighborhood higher order step taylor's series, can discover the tooth face meshing point neighborhood gap is 2 step infinitely greats.
对二阶物面边界条件采用数学手段，推导出一个没有二阶空间导数的表达式，以便于计算。
Additionally, a mathematical manipulation is adopted to remove the second-order spacial derivatives in the body surface boundary condition.
该模型与EGM96相比（70阶次），大地水准面起伏差异最大为2。
The maximum difference of geoid undulation between the model and EGM96(to 70 degrees) is 2.
然后将一个子系统的控制目标嵌入到另一个子系统的控制目标中，用一个控制量使两个子系统同时向各自的滑模面趋近，使该四阶系统稳定。
Study a class of fourth-order nonlinear systems, decouple the whole system into two second-order systems, and design their separate sliding surface of each subsystems.
连铸板坯宽面鼓肚对铸坯中心偏析和裂纹有较大影响，为计算板坯宽面鼓肚，按蠕变规律，需解一个三阶微分方程，按弹塑性规律，需解一个二阶微分方程，十分费时。
In order to compute bulging of wide face of continuous cast slab, it is necessary to solve a third order differental equation for creep or a second order one for elastoplastic deformation.
针对交通微观仿真路网结构模型的层次特点，提出点、线、面分层递阶的分析评价方法。
Designing a new point-line-plane layered method for carrying out traffic status analysis and estimation with regard to the micro-simulation traffic network model.
在年代地层方面，进一步强调以初始海泛面(FFS)作为优化年代地层“阶”的标准。
It is emphasized that the first flooding surface (FFS) is used as a standard or useful marker in optimizing chronostratigraphic and lithostratigraphic boundaries.
用二阶微拢论计算这一截面，结果表示为核矩阵元和激光电场强度的函数。
The cross sections for such processes are calculated in second order perturbation theory and expressed in term of the intensity of laser radiation and the nuclearmatrix elements.
由分层介质表面两不同点响应互谱分析(SASW)得到的有效相速度并不对应于面波基阶模态相速度，它与波场中高阶模态能量分配比例有关。
Affected by higher Rayleigh wave modes in the surface wave field, the effective phase velocity obtained by spectral analysis of surface waves SASW.
还指出仅当柱面或平面光栅时，才能形成二阶子午无离焦平场和弧矢无象散圆场谱面。
It is also shown that only when the gratings are cylinder or plane ones, the second order sagittal anastigmatic circular field and meridional non defocus flat field spectral images can be formed.
现有基本的结构可靠度计算方法可分为一次二阶矩法、蒙特卡罗法和响应面法。
The present usually reliability analysis method for engineering structures are Monte Carlo Simulate (MCS), First-order Second-moment method (FOSM) and reliability Surface method (RSM).
面元和奇点的分布分别采用了二阶和三阶的形式。
The method is based on the second-order or third-order geometric panel and vortex singularities.
结果三阶趋势面拟合优度为最佳。
概括起来主要有四方面：采用三阶六步课堂结构模式；
There are four sides: adopting class mode of three stages and six steps;
本文讨论四阶椭园方程一类周期问题的差分方法及在过渡面、自由曲面设计中的应用。
The paper discusses the difference method of solving the 4th ordered elliptic partial differential equations and its application to the design of blending and free form surfaces.
另一方面，采用传统迭代子和共轭梯度法作为光滑子，我们证明了瀑布型多重网格法对一、二维非线性椭圆边值问题，在能量范数下，均可获得最优收敛阶。
Onthe other hand, with traditional iterations and the conjugate gradient(CG) as smoothers, we can show the optimal convergence rate of the cascadic method in energy norm for 1-D and 2-D cases.
从微分几何学的角度，探讨了在五坐标数控机床上采用圆柱形刀具线接触加工自由曲面的几何学原理，分析了刀具面与被加工曲面二阶密切的条件。
On the basis of the differential geometry, the geometrical theory of machining free form surface by cylindrical cutter in 5-axis NC machine tool is investigated.
这种变化一方面围绕着各式各样的品牌战，通过广告树立品牌个性，以及上移品牌位阶；
The advertizers try to build up the character of the brand and move the position of the brand to the higher place with the help of the ads.
该方法一方面利用三阶累积量提高了抗噪性能，同时又使用非零奇异值矢量减少了存储量与运算量。
The third-order cumulant is used to improve the robustness to noise, and the singular value vector is used to reduce the memory and complicatedness. The…
该方法一方面利用三阶累积量提高了抗噪性能，同时又使用非零奇异值矢量减少了存储量与运算量。
The third-order cumulant is used to improve the robustness to noise, and the singular value vector is used to reduce the memory and complicatedness. The simulated experimental …
该方法一方面利用三阶累积量提高了抗噪性能，同时又使用非零奇异值矢量减少了存储量与运算量。
The third-order cumulant is used to improve the robustness to noise, and the singular value vector is used to reduce the memory and complicatedness. The simulated experimental …
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