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1.
在X-T域对浅层天然气藏进行振幅与炮检距(AVO)分析时,不可避免地遇到球面扩散振幅补偿不精确、浅层动校拉伸切除造成共中心点(CMP)道集中道数太少、CMP道集信噪比低等三方面的问题。文章提出一种新的浅层AVO处理方法,首先应用二维τ-P变换将点震源产生的球面波场分解成平面波场,以实现精确的球面扩散的自动振幅补偿;其次在τ-P域进行动校正,以减少动校正引起的拉伸现象。τ-P变换本身能够有效地提高C  相似文献   

2.
叠加处理是提高地震资料信噪比的主要手段。动校正处理限制了野外观测系统覆盖次数的增大,从而影响了现有的共中心点(CMP)水平叠加方法的去噪能力。文中提出的自适应面元(ADA)叠加法以面元估计代替点估计,等效地增大覆盖次数,提高了资料的信噪比;自适应地选择面无方向,对资料的剩余动、静校正误差进行补偿;对间断点处进行非线性处理,保持资料的横向分辨率。理论数据和实际数据的实验结果表明,ADA叠加可得到很好的改进效果。  相似文献   

3.
THEOPTICALOBSERVATIONOFTHECOLLISTIONSOFCOMETSHOEMAKER-LEVY9WITHJUPITER¥ZhouHongnan(DepartmentofAstronomy,NanjingUniversity,21...  相似文献   

4.
以dA(CuO2面上Cu(P)和项角氧O(A)键长)对Vd[沿Cu(P)-O(A)键和沿Cu(P)-O(P)键方向一个空穴的平均Madelung位势差]做图,发现所有铜氧化物超导体的转变温度和结构参量存在一确定的变化规律,不同超导系统被明显地分离开来,Tc既随dA也随Vd的增大而增大.本文从晶体结构的角度分析了产生该现象的原因.  相似文献   

5.
从实际工业化生产出发,用MS-1和OP-10复合乳化剂替代十二烷基磺酸钠,合成了具有核-壳结构的硬质聚氯乙烯(R-PVC)改性剂CS-ACR-IV;借助于Brabender塑化仪研究了此改性剂的用量及合成参数对R-PVC加工性能的影响。  相似文献   

6.
葡萄抗感霜霉病品种三项生化指标的比较(简报)于凤鸣(河北农业技术师范学院园艺系,昌黎,06660COMPARISONAMONGTHREEBIOCHEMICALINDEXESOFGRAPECULTIVARSANTI-INFECTIONSTODOWNYM...  相似文献   

7.
不论数据库开发应用平台是何种版本,在关系型数据库的程序设计中,一般都需要有原始数据录入或者叫做基础数据采集等功能模块。在以往传统的编程模式中,基本上可以说都是采用逐条数据录入,对应FOX系统而言往往不是用AP-PEND(如 APPEND BLANK与SCAT MEMOMEMV、 GATH MEMO MEMV配合或者APPEFROM ARRA等等)就是用INSERT(如INSERTBLANK与SCAT MEMO MEMV、GATH MEMOMEMV配合或者INSERT INTO-SQL)相关的命令来实现原始…  相似文献   

8.
以dA(CuO2面上Cu(P)和顶角氧O(A)键长)对△Vd(沿Cu(P)-O(A)键和沿Cu(P)-O(P)健方向一个空穴的平均Madelung位势差)做图,发现所有铜氧化物超导体的转变温度和结构参量存在一确定的变化规律,不同超导系统被明显地分离开来,Tc既随dA也随△Vd的增大而增大,本文从晶体结构的角度分析了产生该现象的原因。  相似文献   

9.
MAGNETICRELAXATIONATEARLYTIMESANDFLUXDIFFUSIONBARRIERV(J,B,T)FORTi-1223DOPEDWITHPbANDBaBYCOMPLEXACSUSCEPTIBILITYMEASUREMENTSD...  相似文献   

10.
关于发展西北太平洋鱿鱼钓生产的若干建议汤炳法(宁波海洋渔业总公司,宁波315000)RECOMMENOATIONSONDEVELOPMENTOFSQVIOJIGGINGINTHENORTH-WESTPACIFICTangBingfa(NingboMa...  相似文献   

11.
Language markedness is a common phenomenon in languages, and is reflected from hearing, vision and sense, i.e. the variation in the three aspects such as phonology, morphology and semantics. This paper focuses on the interpretation of markedness in language use following the three perspectives, i.e. pragmatic interpretation, psychological interpretation and cognitive interpretation, with an aim to define the function of markedness.  相似文献   

12.
理论推导与室内实验相结合,建立了低渗透非均质砂岩油藏启动压力梯度确定方法。首先借助油藏流场与电场相似的原理,推导了非均质砂岩油藏启动压力梯度计算公式。其次基于稳定流实验方法,建立了非均质砂岩油藏启动压力梯度测试方法。结果表明:低渗透非均质砂岩油藏的启动压力梯度确定遵循两个等效原则。平面非均质油藏的启动压力梯度等于各级渗透率段的启动压力梯度关于长度的加权平均;纵向非均质油藏的启动压力梯度等于各渗透率层的启动压力梯度关于渗透率与渗流面积乘积的加权平均。研究成果可用于有效指导低渗透非均质砂岩油藏的合理井距确定,促进该类油藏的高效开发。  相似文献   

13.
As an American modern novelist who were famous in the literary world, Hemingway was not a person who always followed the trend but a sharp observer. At the same time, he was a tragedy maestro, he paid great attention on existence, fate and end-result. The dramatis personae's tragedy of his works was an extreme limit by all means tragedy on the meaning of fearless challenge that failed. The beauty of tragedy was not produced on the destruction of life, but now this kind of value was in the impact activity. They performed for the reader about the tragedy on challenging for the limit and the death.  相似文献   

14.
正The periodicity of the elements and the non-reactivity of the inner-shell electrons are two related principles of chemistry,rooted in the atomic shell structure.Within compounds,Group I elements,for example,invariably assume the+1 oxidation state,and their chemical properties differ completely from those of the p-block elements.These general rules govern our understanding of chemical structures and reactions.Using first principles calcula-  相似文献   

15.
We have developed an adiabatic connection to formulate the ground-state exchange-correlation energy in terms of pairing matrix linear fluctuations.This formulation of the exchange-correlation energy opens a new channel for density functional approximations based on the many-body perturbation theory.We illustrate the potential of such approaches with an approximation based on the particle-particle Random Phase Approximation(pp-RPA).This re-  相似文献   

16.
正The electronic and nuclear(structural/vibrational)response of 1D-3D nanoscale systems to electric fields gives rise to a host of optical,mechanical,spectral,etc.properties that are of high theoretical and applied interest.Due to the computational difficulty of treating such large systems it is convenient to model them as infinite and periodic(at least,in first approximation).The fundamental theoretical/computational problem in doing so is that  相似文献   

17.
For molecular systems,the quantum-mechanical treatment of their responses to static electromagnetic fields usually employs a scalar-potential treatment of the electric field and a vector-potential treatment of the magnetic field.Although the potential for each field separately is associated with the choice of an(unphysical)origin,the precise choice of the origin for the electrostatic field has little consequences for the results.This is different for the  相似文献   

18.
Franck-Condon factors bridge the gap between theoretical modeling and experimental observations for molecular electronic spectroscopy and electron transfer.Under the displaced harmonic oscillator approximation,multidimensional Franck-Condon factors are decomposed into a product of many one-dimensional(1D)Franck-Condon(FC)factors,and each 1D-FC factor is associated with one Huang-Rhys factor that determines the leading contribution of  相似文献   

19.
<正>"The Journal of Shanghai Normal University:Mathematics"is published by Shanghai Normal University as regular issues of The Journal of Shanghai Normal University each year from 2014 in English.The editors-in-chief of the issues are professors Yuhao Cong and Maoan Han.The Journal of Shanghai Normal University was started in 1958 with  相似文献   

20.
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