小洼地区洼38井区精细构造解释与储层预测

为寻找洼38井区新的出油点和储量增长点,借助Landmark一体化软件,应用相干体分析,可视化,地震属性分析等新技术对其进行研究,通过研究,。进一步搞清了该区的沉积,构造,储层特征及油气分布规律,发现和落实有利圈闭4个,同时指出了上不勘探的方向;在清东陡坡带应注重断鼻的勘探,在潜山披覆构造带上应注重充填沉积体的勘探,在冷东逆掩断裂带上应以断块勘探为主。     

南阳凹陷马店地区高精度三维地震技术与效果

针对马店地区断裂发育、构造破碎的特点,在高精度三维地震勘探过程中,运用基于正演模型的参数论证、采用小面元宽方位观测,通过精细表层结构调查、逐点设计井深与优选激发岩性等采集技术,改善了地震资料的单炮品质;在处理上采用静校正、叠前去噪、精细速度建模及叠前深度偏移技术提高复杂断裂带地震资料的成像精度;解释方面采用了三维可视化和相干数据体联合手段,通过精细成图,搞清了马店地区复杂断块圈闭,通过钻探发现了新的含油断块。     

储层预测技术在QK17-2油田水平井钻探中的应用

利用钻井、测井数据和地震资料制作合成地震记录 ,确定含油砂岩顶面为强振幅反射的波峰 ;应用三维相干分析精确解释断裂发育及分布规律 ;通过顺层振幅切片和三维可视化技术精确描述砂层组的空间展布 ;测井约束波阻抗反演提高了地震分辨率 ,在此基础上 ,进一步描述出单砂体的形态、厚度及物性的横向变化 ;为大位移水平井提供了准确的着陆点 ,并随时指导水平井钻进 ,使渤海海域首次进行的大位移水平井钻井获得成功     

纹理分析在生物组织光学相干层析图像信息提取和特征识别中的应用

随着光学相干层析(OCT)技术在生物医学成像领域日趋广泛的应用,分析和提取OCT图像中所包含的生物组织信息、对相关特征加以识别,并最终应用于疾病的辅助诊断和诊疗效果的追踪,已经成为一个重要的研究方向.国内外研究者就此提出了多种不同的方法,其中纹理分析方法得到了最为充分的研究,显示出良好的实用性.对纹理分析在生物组织光学...     

改型Wollaston棱镜干涉光谱仪的调制度研究

改型Wollaston棱镜(MWP)无需中继,可构建微型傅里叶变换光谱仪。回顾了MWP的基本原理,从调制度定义出发,计算得到准单色光源的复相干度,找到调制度的影响因素——扩展视场、剪切结构、焦面探测等。建立一般的干涉定域分析模型后,由像点逆光路追迹给出MWP的厚度计算公式,代入调制度约束参数得到不同参量的误差容限。通过FRED记录不同视场扩展情况的灰度与辐照度,结果显示,调制度为0.9时,视场与理论估算值1.24°基本相符;不同剪切量的灰度与辐照度变化特性表明,结构角会使定域垂直系统光轴的入射角发生变化,与晶轴倾角共同影响双折射率差;2.5和8μm像元探测采样表现出调制度差异,描述了定域深度或离焦的影响。以准单色光源、复相干度表示调制度,可将不同影响因素统一至约束参数中,相关变量误差容限可作为MWP-FTS的设计依据。     

Issues in Optical Diffraction Theory

This paper focuses on unresolved or poorly documented issues pertaining to Fresnel’s scalar diffraction theory and its modifications. In Sec. 2 it is pointed out that all thermal sources used in practice are finite in size and errors can result from insufficient coherence of the optical field. A quarter-wave criterion is applied to show how such errors can be avoided by placing the source at a large distance from the aperture plane, and it is found that in many cases it may be necessary to use collimated light as on the source side of a Fraunhofer experiment. If these precautions are not taken the theory of partial coherence may have to be used for the computations.In Sec. 3 it is recalled that for near-zone computations the Kirchhoff or Rayleigh-Sommerfeld integrals are applicable, but fail to correctly describe the energy flux across the aperture plane because they are not continuously differentiable with respect to the assumed geometrical field on the source side. This is remedied by formulating an improved theory in which the field on either side of a semi-reflecting screen is expressed as the superposition of mutually incoherent components which propagate in the opposite directions of the incident and reflected light.These components are defined as linear combinations of the Rayleigh-Sommerfeld integrals, so that they are rigorous solutions of the wave equation as well as continuously differentiable in the aperture plane. Algorithms for using the new theory for computing the diffraction patterns of circular apertures and slits at arbitrary distances z from either side of the aperture (down to z = ± 0.0003 λ) are presented, and numerical examples of the results are given. These results show that the incident geometrical field is modulated by diffraction before it reaches the aperture plane while the reflected field is spilled into the dark space. At distances from the aperture which are large compared to the wavelength λ these field expressions are reduced to the usual ones specified by Fresnel’s theory. In the specific case of a diffracting half plane the numerical results obtained were practically the same as those given by Sommerfeld’s rigorous theory.The modified theory developed in this paper is based on the explicit assumption that the scalar theory of light cannot explain plolarization effects. This premise is justified in Sec. 4, where it is shown that previous attempts to do so have produced dubious results.     

Extraordinary Transport Behaviors of La0.67Sr0.33Mn1-x Crx O3 (0.00≤ x ≤0.30)

M-T curves, ρ-T curves and MR-T curves of La0.67Sr0.33Mn1-xCrxO3(0.00≤ x ≤0.30) were studied. Experimental results indicate that the substitution of Cr on Mn sites is impotent in driving TC, but with an increase of Cr content, there appear two peaks in resistivity and MR response, thus the temperature range of CMR response is significantly broadened. The extraordinary transport behavior and the abnormal CMR effect could be the results of coexistence and competition of Mn3 -O-Mn4 and Mn3 -O-Cr3 channels.     

段落写作训练的一种有效方法：Clustering

介绍了英语段落写作训练的一种有效方法：Ｃｌｕｓｔｅｒｉｎｇ，并对此种方法在启发写作者的思维、帮助确定段落的主题及保持段落主题的统一性和内容的连贯性等方面所起的作用进行了探讨     

多智能体系统协作及控制机理和基本问题分析

首先介绍智能体的概念，并从协作、协调一致性，理性原理及冲突等方面，较为全面而深化入地分析阐述了多智能体系统协从航控制的机理和基本问题。