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221篇 您的检索式:作者名="Ursin"
    题名 作者 年代 出处 被引量
1最佳混合相位反滤滤器的估计显示文摘反滤波用于地震数据以消除子波效应和获得反射序列的估计。在许多情况下,子波是未知的,而仅能估算出子波的自相关函数(ACF)。求解Yule-Walker方程能获得符合最小延迟子波的反滤波器。当子波是混合延迟时,这个反滤波器产生的结果较差。通过求解滤波器方程组的主对角线上ACF的延迟量为α的扩展Yule-Walker方程组,可将反滤波器分解为一个有限长度的滤波器与一个无限长度滤波器的褶积。我们在先前的一篇论文中曾提出,在一个混合延迟的反滤波器中,有限长度滤波器是最大延迟的,而无限长度滤波器则是最小延迟的。本文通过分析有限长度滤波器的Z变换多项式的根改进了上述方法。通过改变混合延尺反滤波器单位圆内根的数目,可获得最多2^a个不同的滤波器。将每个滤波器应用于小的数据集(如一个CMP道集),并选择使得输出结果具有最大L^p(p=5)范数的滤波器为最佳滤波器。这是通过提高a的值来获得最终最佳滤波器。从这一最佳波滤器出发,可以很容易构造出反子波,它可作为地震子波的一个估计来使用。新的算法已用于合成子波和气枪子波以检验其性能和验证重构的子波与初始子波的接近程度。本算法还用于海上叠前地震数据,与用量小延迟滤波器的处理结果比较,本方法改善了叠加剖面。Bjorn Ursin 冯诗齐 2001石油物探译丛2001,,6:2
2Developmental analysis of elongation factor-1 expression in transgenic tobacco显示文摘URSIN V M IRVINE J M HIATT W R SHEWMAKER C K 1991Plant Cell1991,3,6:1
3Quantum teleportation across the Danube: A real-world experiment marks a step towards worldwide quantum communication显示文摘Ursin R Jennewein T Aspelmeyer M 2004Nature2004,,:1
4Automatic nonhyperbolic velocity analysis 显示文摘Brdhim Aabbad Bjorn Ursin Didier Rappin 2009Geophysics2009,74,2:1
5Space-QUEST Experiments with quantum entanglement in space 显示文摘Ursin R Jennewein T Kofler J 2009Europhysics News (S0531-7479)2009,40,3:1
6What are the real problems for patients with functional dyspepsia? 显示文摘Hang T T Withelmen Ursin H 1995Scand J Gastroenteral1995,30,:1
7Reproductive and other risk fac- tors for adenocarcinorna of the cervix, results from a population - based, case - control study ( California, United States)显示文摘Ursin G Pike MC Martin S et a l 1996Cancer Causes Control1996,7,3:1
8A novel mutation in the NOD2 gene associated with Blau syndrome: a Norwegian family with four affected members显示文摘Milman N Ursin K Hedevand E 2009Sea J Rheum2009,38,3:1
9Serum levels of leptin and mammographic density among postmenopausal women: a cross-sectional study breast cancer research 显示文摘Anne SG Ursin MB Veierod M 2006Diabetes Rev2006,8,2:1
10A field study of effects of road traffic and railway noise on poly- somnographic sleep parameters显示文摘MARIT AASVANG G OVERLAND B URSIN R 2001Journal of the Acoustical Society of America2001,129,6:1
11Focusing in dip and AVA compensation on scattering-angle/azimuth common image gathers显示文摘BRANDSBERG-DAHL S DE HOOP M V Ursin B 2003Geophysics2003,68,2:1
12Kinetic analysis of antioxidantcapacity of wine显示文摘TUBARO F RAPUZZI P URSIN F 1999Biofactors1999,9,1:1
13What are the real problems for patients with functional dyspepsia显示文摘Haug TT Wilhelmsen L Ursin H 1995Scand J Ganstrocnenterol1995,30,1:1
14Experi- mental entanglement purification of arbitrary unknown states显示文摘PAN J W GASPARONI S URSIN R 2003Nature2003,423,6938:1
15High- fidelity transmission of entanglement over a high-loss free-space channel显示文摘Fedrizzi A Ursin R Herbst T 2009Nature Physics2009,5,:1
16Maximum-likelihood estimation of seismic impulse responses 显示文摘Ursin B Holberg O 1985Geophysics Prospecting1985,32,2:1
17Entanglement-based quantum communication over 144 km 显示文摘Ursin R Tiefenbacher F Schmitt-mandebrach T 2007Nature Physics2007,3,:1
18Chapter 4 European guidelines for the management of chronic nonspecific low back pain显示文摘O. Airaksinen J. I. Brox C. Cedraschi J. Hildebrandt J. Klaber-Moffett F. Kovacs A. F. Mannion S. Reis J. B. Staal H. Ursin G. Zanoli 2006European Spine Journal2006,,2:1
19Sexual, reproductive, and other risk factors for a denocareinoma of the cervix: results from a population based case control study (California, United States) 显示文摘Ursin G Pilce M C Preston Martin S 1996Cancer Causes Control1996,7,3:1
20Endogenous sex hormones, prolactin and mammographic density in postmeno pausa Norwegian women 显示文摘Bremnes Y Ursin G Bjurstam N 2007Cancer2007,121,:1
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