次波

The multiples will be predicted with the spatial convolution between the original record and the initially estimated value of primary reflection or the seismic record itself. The multiples were scaled using the inverse of the surface operator obtained from the inversion by using the least-squares criterion.

首先通过原始记录与一次波的初始估计值的空间褶积预测多次波，再用最小能量准则反演求得的表层运算元的逆来标定多次波，最后从原始记录中将多次波消除。

The multiples will be predicted with the spatial convolution between the original record and the initially estimated value of primary reflection or the seismic record itself. The multiples were scaled using the inverse of the surface operator obtained from the inversion by using the least - squares criterion.

首先通过原始记录与一次波的初始估计值的空间褶积预测多次波，再用最小能量准则反演求得的表层算子的逆来标定多次波，最后从原始记录中将多次波消除。

Applying the prediction minus technique to attenuate surface correlated multiple,the method needs making inversion of wavelet by principle of minimum energy.

石油地球物理勘探，2 0 0 2 ，37(3)：2 0 9～ 2 15多次波压制的自适应方法以预测相减的思路进行与地表相关的多次波压制，它需要根据能量最小准则反演子波。

Since the 20th century 50's, a lot of multiple suppressing methods have rushed, which differentiate multiple and primary reflection on different standard.

自 20 世纪 50 年代以来，已产生了多种压制多次波的方法技术，它们分别基于不同标准来区分多次波和一次波。

These methods are mainly divided into two classes. One is based on the separableness between primary and multiple or other differences, including periodicity of multiple, time difference and so on.

压制多次波的方法主要分为两大类：一类是基于有效波和多次波之间的可分离性和其他差异性(如多次波周期性、时差差异等)来预测与压制多次波。

I want you to know who I really am I never thought I'd feel this way towards you And if you ever need someone to come along I will follow you, and keep you strong 旅はまた続いてく穏やかな日もつきはまた新しい周期で(Tsuki wa mata atarashii shuuki de)船を照らし出す祈りをささげて新しい日を待つ鲜やかに光る海その果てまで And every time I see your face, The oceans heave up to my heart You make me wanna strain at the oars, And soon I can see the shore 运命の舟を漕ぎ波は次から次へと私たちを袭うけどそれも素敌な旅ねどれも素敌な旅ね Dore mo suteki na tabi ne

我希望你能知道我的真实我从未想过我将要追随着你的方向但如果你需要有人来陪伴我将追随着你并使你坚强就算平淡安稳的日子里旅行也依然继续又一轮阴晴圆缺的月亮照亮了我的身影虔诚地祈祷着期待新的一天到来直到那闪耀着亮丽光芒的大海边际每一次我看见你的脸庞海洋奋力托起我的心脏你令我在荡桨时感到紧张转眼我竟看不到岸的彼方荡起命运的小舟虽然波浪一波一波地袭来这次仍是美好而奇妙的旅行每次都是美好而奇妙的旅行

Firstly, after getting predicted multiples, we use adaptive subtraction algorithm to eliminate multiples and get some inverse wavelets corresponding to every trace in one shot gather, then construct inverse wavelets domain by those inverse wavelets. Secondly, use median filtering method to get inverse wavelet estimation in inverse domain. Thirdly, correct the misshaped inverse wavelets in inverse domain by the inverse wavelet estimation.

其步骤为：首先用SRMA方法预测出表面多次波，并对每一单炮进行单道自适应相减，得到逆子波，形成逆子波域；其次，在逆子波域采用中值滤波，提取接近真实逆子波的逆子波估计；第三，在逆子波域用逆子波估计对畸变的逆子波进行校正；最后采用校正后的逆子波来衰减多次波。

Usually it does not matter whether the reflections being mapped are primary but rather whether their attitude is indicative of the attitude of the appropriate portion of the section, so that the tailing produced by the many short-path peg-leg multiples does not detract seriously.

通常，所要成图的反射波是否是一次波无关紧要，而它们的形态是否能表示剖面的部分形态却是非常重要的。所以，短程微屈多次反射波产生的拖尾对剖面质量的影响不大。

Presence of multiples leads to poor quality in main stages of offshore seismic data processing, such as velocity analysis, stacking and imaging. Three basic multiple attenuating methods are reviewed; and a more effective multiple attenuator is achieved by joining them. As the first step, shot or receiver records are extrapolated by wave-equation datum algorithms. The extrapolation will establish a model of waterbottom multiples. Waterbotton multiples will then be removed by subtracting the extrapolated records from the original records. After that, predictive deconvolution is used to attenuate the multiples created by source ghost. Finaly, RADON transformation is adopted to separate peg-leg multiples and residual water-bottom multiples from the original data in the τ-p domain.

地震勘探尤其是海上地震勘探中存在着各类多次波，由于多次波的存在严重影响了速度分析、叠加、偏移成像等地震资料处理，海上多次波主要有全程多次波和层间多次两大类，为了压制海上不同类型的多次波，本文首先分析波场外推、预测反褶积和拉东变换衰减不同多次波的理论基础，然后联合采用这些方法，分别衰减全程多次波和层间多次波；即：首先对炮记录或者接收点记录进行波场外推，建立海底多次波模型，预测并减去全程多次波，然后利用预测反褶积衰减掉周期性明显的多次波，最后将数据转换到τ-p 域，用拉冬变换根据同一时间多次波和有效波在速度等方面的差异，进一步分离层间多次波和剩余的全程多次波，并在该域中切除分离出的多次波，从而实现联合多次波衰减处理。

It shows that, because of HOMW, the sound wave in expansion chamber is not in plane form; HOMW can decrease the capability of muffler; and the positions of inlet and outlet are important to the performance of mufflers.

结果表明，由于高次波的存在，消声器内部不一定是平面波；高次波对消声器性能有一定影响，能使某些频段的消声量下降，甚至失效；适当选择进出口管位置能抑制某几次高次波的出现，扩展消声器的有效频率。

The absorption and distribution of chromium were studied in ryeusing nutrient culture technique and pot experiment.

采用不同浓度K2CrO4(0，0.4，0.8和1.2 mmol/L)的Hoagland营养液处理黑麦幼苗，测定铬在黑麦体内的亚细胞分布、铬化学形态及不同部位的积累。

By analyzing theory foundation of mathematical morphology in the digital image processing, researching morphology arithmetic of the binary Image, discussing two basic forms for the least structure element: dilation and erosion.

通过分析数学形态学在图像中的理论基础，研究二值图像的形态分析算法，探讨最小结构元素的两种基本形态：膨胀和腐蚀；分析了数学形态学复杂算法的基本原理，把数学形态学的部分并行处理理念引入到家实际应用中。