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Further studies on the numerical simulation of bubble plumes in the cold seepage active region

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Acta Oceanologica Sinica 2016年第1期35卷 118-124页

作者： li canping GOU limin YOU Jiachun liU Xuewei OU Chuling Guangdong Province Key Laboratory for Coastal Ocean Variation and Disaster Prediction (GLOD) Guangdong Ocean University Laboratory of Ocean Remote Sensing and Information Technology Guangdong Ocean University School of Ocean Sciences China University of Geosciences (Beijing) School of Geophysics and Information Technology China University of Geosciences (Beijing)

Using the occurrence characteristics of bubble plumes in the South China Sea as a reference, this paper continues to study the seismic responses produced by bubble plumes in the cold seepage active region. To make the plume modelling scheme more reasonable, we modified the original modelling scheme and reconstructed a plume water body model based on the variation of its radius as bubbles rise in seawater. The plume seismic records of shot gathers were obtained by forward simulation. The seismic records of single shot show obvious characteristics of a scattering wave field and the periodic characteristics of the model. Seismic records of shot gathers were processed using prestack depth migration. The boundary of its imaging section has a good convergence effect. The migration sections can be imaged distinctly with higher accuracy. The aforementioned studies once again laid a foundation for the further study of the seismic responses produced by plumes. They also gradually probed a more suitable seismic data processing method for plumes and provided a theoretical guidance for the identification of plumes.

关键词： plume cold seepage gas hydrate scattered wave numerical simulation

Forward modeling and inversion of the relation model between the gas content of plume and its seismic attribute

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Acta Oceanologica Sinica 2021年第5期40卷 120-128页

作者： canping li Jiachun You Yanchun Tan Fengying Chen Yilin liu Zihao Guo Xinyu Tian School of Electronics and Information Engineering Guangdong Ocean UniversityZhanjiang 524088China Southern Marine Science and Engineering Guangdong Laboratory(Zhanjiang) Zhanjiang 524006China School of Geophysics Chengdu University of TechnologyChengdu 610059China

The methane bubble plume attracts interest because it offers direct evidence of seafloor gas leakage and plays an indirect role in the exploration and identification of natural gas *** this study,based on established plume models and their migration sections,three amplitude-class attributes were extracted from three formations for the migration sections of five plumes,and the correlation between the gas content and seismic attribute was *** the gas content increases,the amplitude attribute correspondingly increases,and the linear correlation is relatively ***,correlation coefficients between gas content and amplitude attributes are close to *** using linear fitting,the relation model between the gas content of the plume and the seismic attribute was *** relation model was subsequently used to invert the gas content from a real databearing *** of the gas content section of the plume with the attribute section and real seismic section reveals common distribution characteristics,namely,the color of the section in the lower right corner is *** the amplitude value is large in the seismic section of the real plume,the amplitude attribute value is also large in the corresponding attribute section,and the inverted value of the gas content is also large(because gas content and amplitude are linearly correlated),which indicates that the plume bubbles of the section in the lower right corner is intensively ***,the obtained gas content section of the plume can reflect the distribution of the plume bubble content more simply and intuitively,from which the distribution law of seafloor bubbles can be deduced,and this lays a foundation for the further estimation of the gas content of the plume and hydrate reserves.

关键词： methane plume natural gas hydrate gas content seismic attribute linear fitting

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提高套管井电场数值计算精度的方法研究

测井技术 2010年第2期34卷 135-137,142页

作者：李灿苹广东海洋大学信息学院广东湛江524088

准确求取井轴上的电位值对获得地层电阻率非常重要。研究了套管井电阻率测井过程中套管井中电场数值计算的精度和稳定性。介绍了套管井地层电阻率测井原理。给出了计算套管井中井轴上电场电位的2种方法:积分法和留数法。采用积分法计算... 详细信息

准确求取井轴上的电位值对获得地层电阻率非常重要。研究了套管井电阻率测井过程中套管井中电场数值计算的精度和稳定性。介绍了套管井地层电阻率测井原理。给出了计算套管井中井轴上电场电位的2种方法:积分法和留数法。采用积分法计算的电位值在场源距较小时是可取的,但由于被积函数具有振荡性,致使其结果不稳定。采用留数法计算的电位值随着场源距的变大而呈指数规律地迅速减小,很好地反映了电场中的物理规律又提高了电位值的精度。数值计算结果表明,采用留数法的电位值计算结果更稳定,且精度高。

关键词：电阻率测井套管井电场数值计算积分法留数法精度

Effect of inguinal hernia on the thickness and blood flow of spermatic cord in boys

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World Journal of Pediatric Surgery 2019年第2期2卷 25-28页

作者： Shoujiang Huang canping li Xiuzhen Yang Jianfeng liang Dongpi Wang Neonatal Surgery Children's HospitalZhejiang University School of MedicineHangzhouChina Ambulatory Surgery Children's HospitalZhejiang University School of MedicineHangzhouChina Ultrasonography Children's HospitalZhejiang University School of MedicineHangzhouChina Department of Medical Record Management Children's HospitalZhejiang University School of MedicineHangzhouChina Anesthesiology Children's HospitalZhejiang University School of MedicineHangzhouChina

Objective To evaluate the effect of inguinal hernia(IH)on the spermatic cord using spermatic cord ultrasonography(SCU).Methods From January 2016 to January 2017,boys with IH who received SCU at the start of open herniorrhaphy(OH)were enrolled in this *** age and weight at SCU,width of the spermatic cord(SC-W),peak systolic velocity(PSV)in the spermatic artery(SA-PSV)and velocity in the pampiniform plexus(PP-V),and the interval between the initial and the second OH in boys with metachronous inguinal hernia(MIH)were recorded,and the relationship among them was *** with unilateral IH comprised the IH group,and boys with MIH comprised the MIH *** with polydactylism served as the ***-way analysis of variance tested the differences among ***’s r tested the relationship between SC-W in the MIH group and the *** A total of 80 boys were enrolled in this study(IH group 29,MIH group 26,and control group 25).SA-PSV and PP-V in the hernia side were faster and slower than the control,*** was no significant difference in PP-V and SA-PSV of the treated side in the MIH group and in the control *** herniorrhaphy,SC-W was tapered down to normal ***-W,SA-PSV,and PP-V in the treated side were all highly correlated to the interval in a curvilinear *** PSV was positively correlated with SC-W in boys with IH,and PP-V was negatively correlated;herniorrhaphy could reverse the impairment.

关键词： faster slower flow

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随机-均匀介质地震波振幅属性研究

石油物探 2009年第5期48卷 465-469页

作者：李灿苹刘学伟广东海洋大学广东湛江524088 中国地质大学(北京) 北京100083

基于二维随机-均匀介质模型,讨论了复杂介质中由非均匀体产生的散射波的特性,同时讨论了不同尺度地质体条件下散射波对直达波和反射波的影响。建立了11个不同尺度的随机-均匀介质模型,并利用有限差分法进行了正演模拟。基于正演模拟结果... 详细信息

基于二维随机-均匀介质模型,讨论了复杂介质中由非均匀体产生的散射波的特性,同时讨论了不同尺度地质体条件下散射波对直达波和反射波的影响。建立了11个不同尺度的随机-均匀介质模型,并利用有限差分法进行了正演模拟。基于正演模拟结果,提取了直达波、散射波和反射波的均方根振幅、平均绝对振幅、振幅峰态和绝对振幅积分4种振幅属性,绘制了振幅属性与非均匀地质体尺度的关系曲线。研究认为,当非均匀地质体尺度与地震波长相近或更小时,3种地震波的4种振幅属性值随地质体尺度的增大而增大;当非均匀地质体尺度比地震波长大或大很多时,随着地质体尺度的增大,直达波和反射波的4种振幅属性值均呈减小趋势,散射波的4种振幅属性值呈增大趋势。

关键词：非均匀地质体散射波随机介质振幅属性

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介质材料介电常数均匀性测试评价系统

宇航材料工艺 2019年第4期49卷 80-83页

作者：高冲李恩李灿平余承勇王强电子科技大学成都611731 成都恩驰微波科技有限公司成都611731

介绍了针对介质材料的介电常数的均匀性测试方法,基于谐振微扰法和场分析理论,建立了圆柱腔内样品分段测试模型。利用工作在TM0n0的圆柱腔进行方法可行性验证后,设计了一套由矢量网络分析仪、计算机、圆柱腔、移动装置等组成的介电常数... 详细信息

介绍了针对介质材料的介电常数的均匀性测试方法,基于谐振微扰法和场分析理论,建立了圆柱腔内样品分段测试模型。利用工作在TM0n0的圆柱腔进行方法可行性验证后,设计了一套由矢量网络分析仪、计算机、圆柱腔、移动装置等组成的介电常数均匀性测试系统,并利用自动化测试软件,旨在实现对介质材料介电常数的在线自动化均匀性测试。通过对三种典型介质材料进行均匀性测试分析,与材料制造商比对的测试差别分别小于0.02、0.04和0.15,证明了该均匀性能测试评价系统的可行性和有效性。

关键词：介质材料介电常数圆柱腔均匀性测试

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冷泉活动区气泡羽状流数值模型研究

海洋地质与第四纪地质 2017年第5期37卷 141-150页

作者：李灿苹勾丽敏尤加春欧触灵广东海洋大学海洋遥感与信息技术实验室湛江524088 中国地质大学(北京)海洋学院北京100083 中国地质大学(北京)地球物理与信息技术学院北京100083

羽状流对天然气水合物的识别起到了间接指示作用,为研究冷泉活动区气泡羽状流产生的地震响应,需建立符合实际羽状流特征的模型。为此,参考实际羽状流赋存状态,结合含气泡水体特征,在已建立模型基础上,从羽状流气泡的垂直运移规律、分布... 详细信息

羽状流对天然气水合物的识别起到了间接指示作用,为研究冷泉活动区气泡羽状流产生的地震响应,需建立符合实际羽状流特征的模型。为此,参考实际羽状流赋存状态,结合含气泡水体特征,在已建立模型基础上,从羽状流气泡的垂直运移规律、分布特点及羽状流外观特征上对模型进行了改进,先后获得3个羽状流模型,最后的模型Ⅲ更接近实际羽状流赋存特征。通过与实际羽状流的对比,讨论分析了模型Ⅲ的合理性,并得出结论:所建模型体现了实际羽状流气泡的本质特征,并包含了更为复杂的气泡含量变化,可用于进一步深入研究羽状流地震响应特征,也为气泡羽状流的地震识别及天然气水合物的相关研究提供了较好的数值模型。

关键词：羽状流冷泉天然气水合物数值模拟偏移成像

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灾难中的数据备份与恢复策略初探

科技广场 2009年第7期 73-74页

作者：赵哲文李灿平成都理工大学四川成都610059

在高度信息化的今天,各种数据存储设备已经取代了传统的纸张,成为数据的最重要载体,而各种自然灾害,例如地震,都是很难被预测的,它们对于数据的安全造成了极大的威胁,因此无论对于个人还是企业或是政府,灾难前的数据备份以及灾难后的数... 详细信息

在高度信息化的今天,各种数据存储设备已经取代了传统的纸张,成为数据的最重要载体,而各种自然灾害,例如地震,都是很难被预测的,它们对于数据的安全造成了极大的威胁,因此无论对于个人还是企业或是政府,灾难前的数据备份以及灾难后的数据修复都显得十分重要。

关键词：地震危害数据备份数据修复

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边缘检测算法在不同分辨率图像中的性能研究

计算机测量与控制 2006年第2期14卷 166-169页

作者：吴学明李灿平成都理工大学信息管理学院四川成都610059 成都理工大学信息工程学院四川成都610059

边缘检测是图像处理、计算机视觉中的重要内容之一,是实现图像分割、特征提取和图像理解的基础,也是仍未得到圆满解决的研究课题;图像分辨率是衡量图像质量的重要参数,分辨率越高图像质量越好,存储空间也越大;重点讨论了数字图像边缘检... 详细信息

边缘检测是图像处理、计算机视觉中的重要内容之一,是实现图像分割、特征提取和图像理解的基础,也是仍未得到圆满解决的研究课题;图像分辨率是衡量图像质量的重要参数,分辨率越高图像质量越好,存储空间也越大;重点讨论了数字图像边缘检测中常用的几种经典的边缘检测算法对图像在不同分辨率时的性能变化,以及图像在不同分辨率条件下加入噪声时的性能变化,分析了造成这些变化的主要原因;同时,通过实验得出了这些边缘检测算法的优缺点和一些经验性结论,以便在实际应用中更好地发挥它们的特长;实验证明,这些边缘检测算法对图像和加噪图像在不同分辨率下的性能及其变化存在明显的差异。

关键词：边缘检测算子图像处理图像分辨率噪声