次波

An approximate nth derivative of an analytical signal can be obtained by applying n times of the wavelet transform to the signal.

用Haar小波对信号进行n次连续小波变换，可得到信号的近似n阶导数。

On one occasion, he sent word to Apollonius,84 whom he had summoned from Chalcis, to come to the House of Tiberius85 (where at the time he was staying) in order that he might put Marcus Antoninus in his charge, but Apollonius replied "The master ought not come to the pupil, but the pupil to the master".

一次，他送了个条子给从卡尔基斯召来的阿波罗纽斯（84），到台伯河上的房子（85）来，以便让马尔库斯。安东尼跟他学习；但是阿波罗纽斯答复说："教师不应该去找学生，应该是学生来找教师。"

Chasseur was a Baltimore clipper commanded by Captain Thomas Boyleo on his first voyage in 1814, Boyle unexpectedly sailed east, directly to the British Isles, where he harassed the British merchant fleet, sent a notice to the King by way of a captured merchant vessel that he had released for the purpose.

"猎人"号一艘巴尔迪摩快速帆船，美国一战时最有名的武装民船之一。由托马斯。波义尔船长指挥。1812年从托马斯坎普船厂下水。1814年作为"猎人"号的主人，波义尔船长出人意料地让她的第一次航行向东方行驶，直往英国的不列颠群岛。在那里他侵扰英国商船。船长做出一件异常大胆的举措。

Regulations of bifurcation in closed tube are narrated.

对由策动单元和驻波管构成的耦合系统所产生次谱波、分岔的规律做了论述。

Based on the radar dense data of convectional cloud on June 12,2004 in Yongdeng county,choosing two similar convectional clouds as seeding and non-seeding cloud,the remarkable changes of radar echo parameters of the seeding cloud compared with the non-seeding cloud were discussed in this paper,and the rain enhancement effect was evaluated primarily with ground observational rainfall data.The results show that many aspects of the seeding cloud,such as precipitation,life characteristic and vertical characteri...

利用2004年6月12日甘肃省永登县雷达观测对流云的加密资料，选取了2次相似对流云过程分别作为目标云和对比云，探讨了目标云作业前后较对比云雷达回波有关参数的显著变化，并结合地面雨量点观测资料对地面人工增雨作业效果进行了初步分析，结果表明：目标云在降水、生命期特征、回波垂直特征参数变化方面，表现出作业前后较对比云存在明显差异，目标云作业40 m in后地面产生0.6 mm降水，而对比云则从新生发展到减弱消散阶段经历较短的时间(30 m in)，地面并无降水产生，从而推断本次人工增雨达到了一定的预计效果。

According to the multi-scale propagation characteristic of image edge and noise as well as principle of edge detection using wavelet transforman,an algorithm based on cubic B-spline wavelet and directional derivative is presented.

根据图像边缘及噪声的多尺度传播特性和小波边缘检测的基本原理，提出了一种基于方向导数和三次B样条小波的边缘检测算法。

Deconvolvtion is used to eliminate effects of ghost multirefluction earth filtering when seismic secondary wave spreading. Deconvolution is a special way to eliminate these factors.

地震资料的反褶积处理是针对地震激发子波在传播过程中受虚反射、层间多次和大地滤波等影响，专门用于消除这些因素对地震子波改造的一种处理方法。

In the paper,according to homogeneous balance principle and F-expantion method,some double-periodic exact solutions of a fifth-order KdV-like equation with variable coefficients are obtained in form of Jacobi elliptic function .

利用齐次平衡原则和F-展开法，求出了一个五阶变系数KdV-like方程的一些用Jacobi 椭圆函数表示的双周期解。并且在极限的情况下，得到了该方程的孤立波解和三角函数表示的周期波解

Protection schemes based on the zero sequence fundamental voltage and the third harmonic voltage and the injection voltage are presented in this paper, and based on which, the factors which affects the protection schemes based on the zero sequence fundamental voltage and the relevant measures is presented.

本文在对基波零序电压型定子接地保护、三次谐波电压型定子接地保护和外加电源式定子接地保护各种方案的构成原理及其优缺点进行分析的基础上，详细分析了影响基波零序电压型定子接地保护的各种因素，并提出了相应措施。

Its implementation processes include:①to perform wavelet transform and frequency decomposition and reconstruction to gain the seismic data with high quality;②to adopt least square method to approach and fit the local secondary curved face, and compute the fit coefficients of the secondary curved face, then use these coefficients to gridding mapping bed plane to compute the average curvature and Gauss curvature, then, obtain other curvatures through the various linear combinations of the two curvatures above;③to generalize the curvature of the bed layer to compute and reconstruct the curvature volume.

其实现过程为：①对地震资料进行小波变换、分频重构，获得高质量的地震资料；②采用最小二乘法一次逼近，对局部二次曲面进行拟合，求取二次曲面拟合系数，并利用这些系数对网格化成图层面计算平均曲率和高斯曲率，再从两个曲率的不同线性组合，获取其他曲率；③将层面曲率推广，计算和重构曲率数据体。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。