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东海陆坡天然气水合物成藏地质条件和BSR反射及成藏类型特征 被引量:3
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作者 许红 蔡瑛 +7 位作者 孙和清 闫桂京 魏凯 赵新伟 朱玉瑞 施剑 董刚 李清 《热带海洋学报》 CAS CSCD 北大核心 2013年第4期22-29,共8页
在分析研究区高热流、高地温梯度、强烈火山及黑潮活动地质背景及对天然气水合物形成的影响和前人相关工作进展基础上,针对国内外冷泉、二氧化碳水合物调查发现进行分析,指出研究区具有形成天然气水合物的油气地质条件;通过ODP195航次K... 在分析研究区高热流、高地温梯度、强烈火山及黑潮活动地质背景及对天然气水合物形成的影响和前人相关工作进展基础上,针对国内外冷泉、二氧化碳水合物调查发现进行分析,指出研究区具有形成天然气水合物的油气地质条件;通过ODP195航次KS-1井及研究区实测热流数据301个(组)与水深资料开展拟合分析,建立了水深—水温变化曲线,与物理化学平衡状态模拟结果确定500m水深是研究区天然气水合物成藏合适水深的结论相符;特别是通过前人有关研究区地震调查解释天然气水合物模拟海底反射(bottom simulating reflector,BSR)影像及其特征分析,提供了最新常规和高分辨率二维地震BSR的解释、常规与特殊地震资料系列处理的部分成果,包括地震信号增强与速度精细等方法的处理认识,发现并提出了大陆斜坡、斜坡根、海中低隆、深海平原和隆中凹等5种BSR反射类型,指出它们构成冲绳海槽天然气水合物的不同成藏类型,是下一步研究重要课题。 展开更多
关键词 东海陆坡 冷泉与二氧化碳水合物 天然气水合物 黑潮影响 BSR反射类型 信号增强 速度倒转剖面 成藏条件
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乌尔逊凹陷地震反射终止类型及其纵向叠置特征与不整合界面的识别 被引量:1
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作者 龚华 李忠权 +1 位作者 陈骁 陈均亮 《大庆石油学院学报》 CAS 北大核心 2011年第1期8-14,113,共7页
通过对乌尔逊凹陷各反射界面终止类型的识别,分析地震反射终止类型的纵向叠置特征,结合各时期构造运动和沉积建造背景,解析乌尔逊凹陷各不整合界面的地质意义,并通过剖面演化史分析进行验证.结果表明:区域性构造运动所形成的不整合界面... 通过对乌尔逊凹陷各反射界面终止类型的识别,分析地震反射终止类型的纵向叠置特征,结合各时期构造运动和沉积建造背景,解析乌尔逊凹陷各不整合界面的地质意义,并通过剖面演化史分析进行验证.结果表明:区域性构造运动所形成的不整合界面,上覆地层通常上超于界面之上,界面对下伏地层普遍表现为削截;局部不整合界面虽然在局部会出现上超下削现象,但界面上下属于同一个沉积建造,不是区域性构造运动的响应. 展开更多
关键词 乌尔逊凹陷 地震反射终止类型 纵向叠置特征 不整合界面
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基于PO/AP的角反射体RCS模型构建及分析 被引量:11
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作者 张俊 胡生亮 +1 位作者 王聘 范学满 《系统工程与电子技术》 EI CSCD 北大核心 2018年第7期1478-1485,共8页
为全面深入掌握角反射体全向雷达截面积(radar cross section,RCS)特性,提出了综合利用物理光学(physical optics,PO)和区域投影(area projection,AP)的混合算法,构建了基于PO/AP的三面角反射体全向RCS模型,研究了包括角反射体形状、尺... 为全面深入掌握角反射体全向雷达截面积(radar cross section,RCS)特性,提出了综合利用物理光学(physical optics,PO)和区域投影(area projection,AP)的混合算法,构建了基于PO/AP的三面角反射体全向RCS模型,研究了包括角反射体形状、尺寸及入射波方位角、俯仰角、频率、极化方式等参数在内的角反射体RCS特性,并对3种反射类型进行了独立分析,最后通过FEKO(一款三维全波电磁仿真软件)仿真对算法的有效性进行了验证。结果表明:所提算法是角反射体全向RCS模型构建及分析行之有效的手段,其在有效保证计算精度的前提下,能够显著提高角反射体RCS的预估效率。 展开更多
关键词 反射 雷达截面积 物理光学法 区域投影法 极化方式 反射类型
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一种Protobuf 到JSON 动态转换方法 被引量:2
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作者 田丹 张金杰 +2 位作者 李翀 曲艳华 焦昊 《数据与计算发展前沿》 2020年第4期155-164,共10页
【背景】Protobuf和JSON是目前两种主流网络数据结构,有着各自的特点和应用场景,随着互联网应用的场景复杂,不同场景下数据交换上有了新的要求。JSON主要应用于Web浏览器到服务器数据传输,Protobuf主要用于客户端到服务器端高效安全数... 【背景】Protobuf和JSON是目前两种主流网络数据结构,有着各自的特点和应用场景,随着互联网应用的场景复杂,不同场景下数据交换上有了新的要求。JSON主要应用于Web浏览器到服务器数据传输,Protobuf主要用于客户端到服务器端高效安全数据传输。【目的】若能实现两者的转换,可以促进数据交互,极大地提高开发效率。【方法】本文基于动态解析和类型反射技术,实现了Protobuf和JSON数据动态转换,并搭建测试平台和编写测试用例进行了验证。【结果】实验表明,该方法可靠稳定兼容性好,在测试用例不同测试数据下转换效率保持20MB/s,Protobuf 2和Protobuf 3均可正常转换。 展开更多
关键词 Protobuf JSON 转换 动态解析 类型反射
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C++/CLI凤凰的涅槃
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《程序员》 2004年第11期68-75,共8页
自上世纪八十年代末以来,C++就成为程序员中长盛不衰的话题。对于九十年代成长起来的中国程序员来说,C++更有特殊意义。他们是从Borland C++那里体验了编程的乐趣,从C++教程里摸索面向对象的真义,从Visual C++入手体验Windows编程... 自上世纪八十年代末以来,C++就成为程序员中长盛不衰的话题。对于九十年代成长起来的中国程序员来说,C++更有特殊意义。他们是从Borland C++那里体验了编程的乐趣,从C++教程里摸索面向对象的真义,从Visual C++入手体验Windows编程的奥秘,从MFC中体会框架的宏大和精致,从STL步入泛型编程的大门。可以说,C++伴随了整整一代程序员的成长与成熟。不但如此,极盛时代的C++在工业界据有至高的地位,在九十年代的最初几年,从前端到后端,从系统层到应用层,C++全面渗透。 展开更多
关键词 C++/CLI WINDOWS编程 编程语言 代码 静态对象模型 通用语言基础构造 绑定 类型反射
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Shrek:a dynamic object-oriented programming language 被引量:1
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作者 曹璟 徐宝文 周毓明 《Journal of Southeast University(English Edition)》 EI CAS 2009年第1期31-35,共5页
From a perspective of theoretical study, there are some faults in the models of the existing object-oriented programming languages. For example, C# does not support metaclasses, the primitive types of Java and C# are ... From a perspective of theoretical study, there are some faults in the models of the existing object-oriented programming languages. For example, C# does not support metaclasses, the primitive types of Java and C# are not objects, etc. So, this paper designs a programming language, Shrek, which integrates many language features and constructions in a compact and consistent model. The Shrek language is a class-based purely object-oriented language. It has a dynamical strong type system, and adopts a single-inheritance mechanism with Mixin as its complement. It has a consistent class instantiation and inheritance structure, and the ability of intercessive structural computational reflection, which enables it to support safe metaclass programming. It also supports multi-thread programming and automatic garbage collection, and enforces its expressive power by adopting a native method mechanism. The prototype system of the Shrek language is implemented and anticipated design goals are achieved. 展开更多
关键词 dynamic typing metaclass programming computational reflection native method object-oriented programming language
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Thin-bed thickness calculation formula and its approximation using peak frequency 被引量:13
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作者 Sun Luping Zheng Xiaodong Li Jingsong Shou Hao 《Applied Geophysics》 SCIE CSCD 2009年第3期234-240,299,共8页
Quantitative thickness estimation below tuning thickness is a great challenge in seismic exploration. Most studies focus on the thin-beds whose top and bottom reflection coefficients are of equal magnitude and opposit... Quantitative thickness estimation below tuning thickness is a great challenge in seismic exploration. Most studies focus on the thin-beds whose top and bottom reflection coefficients are of equal magnitude and opposite polarity. There is no systematic research on the other thin-bed types. In this article, all of the thin-beds are classified into four types: thin-beds with equal magnitude and opposite polarity, thin-beds with unequal magnitude and opposite polarity, thin-beds with equal magnitude and identical polarity, and thin-beds with unequal magnitude and identical polarity. By analytical study, an equation describing the general relationship between seismic peak frequency and thin-bed thickness was derived which shows there is a Complex implicit non-linear relationship between them and which is difficult to use in practice. In order to solve this problem, we simplify the relationship by Taylor expansion and discuss the precision of the approximation formulae with different orders for the four types of thin-beds. Compared with the traditional amplitude method for thin-bed thickness calculation, the method we present has a higher precision and isn't influenced by the absolute value of top or bottom reflection coefficient, so it is convenient for use in practice. 展开更多
关键词 thin-bed quantitative thickness calculation peak frequency Taylor expansion approximation
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Abnormal Phenomena of Volume Strain before Large Earthquakes 被引量:1
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作者 Wu Lijun Chen Zhengwei +3 位作者 Li Hangu Xu Lei An Bayaer Xu Shunqiang 《Earthquake Research in China》 CSCD 2015年第3期373-385,共13页
This paper studies the imminent anomalies observed by the Sacks volume strainmeter in Erzhangying station and Tiantanghe station before 80 earthquakes with Ms≥ 7. 0 which took place from January 2011 to April 2014 al... This paper studies the imminent anomalies observed by the Sacks volume strainmeter in Erzhangying station and Tiantanghe station before 80 earthquakes with Ms≥ 7. 0 which took place from January 2011 to April 2014 all over the world. Then, preconditions for anomaly identification are put forward for complex earthquake cases. Statistical results show that volume strain observation has a better earthquake reflecting ability for earthquakes with magnitudes larger than 7. 0 and epicentral distance within 8000kin. In addition, these results also reflect that the volume strain observation can better reflect precursory anomalies of such earthquakes. Based on categorization and description of those anomalies, we divide the anomalies into three types, that is, earth tide distortion type, abrupt change type and slow earthquake type. Furthermore, the paper makes a statistical analysis of these types and preliminarily discusses their mechanical properties as well. According to research, volume strain anomaly has an indicative significance to future strong earthquakes in the world. 展开更多
关键词 Large earthquakes Volume strain The earth tide distortion Abruptchange Slow earthquakes Earthquake case study
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卡1-顺西地区碳酸盐岩储层响应特征及有利勘探部位优选
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作者 龚伟 林新 +1 位作者 任丽丹 杨春琴 《新疆地质》 CAS CSCD 2017年第2期167-172,共6页
卡1-顺西地区是重要的油气勘探潜力区,钻井表明该区油水关系复杂,优质储层钻遇难度大,油气成藏控制因素及规律不明。通过对研究区已钻井统计分析,建立储层综合评价标准,开展储层充填物影响因素和正演模拟分析,明确储层地震响应特征。通... 卡1-顺西地区是重要的油气勘探潜力区,钻井表明该区油水关系复杂,优质储层钻遇难度大,油气成藏控制因素及规律不明。通过对研究区已钻井统计分析,建立储层综合评价标准,开展储层充填物影响因素和正演模拟分析,明确储层地震响应特征。通过实钻井储层发育特征、油气钻遇情况与盖层、构造、断裂的关系分析,研究高效井油气成藏控制因素。结果表明,强反射异常是卡1-顺西地区碳酸盐岩储层的地震响应特征,"串珠"、"短板"是规模储集体的甜点,裂缝型储层形成的杂乱反射响应特征是重要的储层目标类型,但部署需慎重。断裂带附近储层发育,有利于油气富集,断裂带周围1 km范围内可能是最有利的勘探区域,断裂带两侧封闭的规模储集体高点是最有可能的高效井甜点。研究结果为卡1-顺西地区碳酸盐岩后期勘探提高储层和油气钻遇率奠定了坚实基础。 展开更多
关键词 碳酸盐岩储层 油气成藏 反射类型
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Characteristics of hydrocarbon source rocks of No.3 buried-hill region in Nanpu Sag
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作者 Ma Guanghua Zhang Hongchen +1 位作者 Qian Fengyan Chen Haixia 《Engineering Sciences》 EI 2014年第1期87-92,96,共7页
Based on the data of 44 samples of hydrocarbon source rocks in Nanpu No.3 buffed-hill region, the kerogen type is judged through the pyrolysis and microscopic identification. At the same time, organic matter maturity ... Based on the data of 44 samples of hydrocarbon source rocks in Nanpu No.3 buffed-hill region, the kerogen type is judged through the pyrolysis and microscopic identification. At the same time, organic matter maturity and hydrocarbon generation threshold are studied by using vitrinite reflectance, pyrolysis yield and hydrocarbon abundance. Meanwhile the hydrocarbon expulsion threshold is calculated. And the characteristics of organic hydrocarbon generation and expulsion are preliminarily revealed and evaluated. The result shows that the No.3 buffed-hill region has abundant hydrocarbon source rocks with high content of organic carbon. And the primary types of kerogen are II, and lI 2. The hydrocarbon source rocks which passed biochemistry, thermolysis and thermal cracking have developed into the mature-postmature phase of different extents. And plenty of oil and gas were expelled out. It is believed the depth of oil-generating window is 3 600 m and the depth of hydro- carbon-expulsion threshold is 4 100 m. The comprehensive analysis indicates that Nanpu No.3 burried-hill region has a certain condition to generate hydrocarbon which is very promising in oil exploration and thus can become an important exploration and development target next. 展开更多
关键词 hydrocarbon source rocks KEROGEN pyrolysis yield index oil threshold hydrocarbon-expulsion threshold
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Initial research on the polarized reflectance of typical urban surface types measured by the Directional Polarimetric Camera 被引量:1
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作者 XIE DongHai GU XingFa +5 位作者 CHENG TianHai YU Tao LI ZhengQiang CHEN XingFeng CHEN Hao GUO Jing 《Science China Earth Sciences》 SCIE EI CAS 2011年第8期1199-1205,共7页
This paper retrieves the bidirectional polarization distribution functions (BPDFs) of the distinct urban cover in the Pearl River Delta (PRD) region employing the high spatial resolution of multi-angle polarized measu... This paper retrieves the bidirectional polarization distribution functions (BPDFs) of the distinct urban cover in the Pearl River Delta (PRD) region employing the high spatial resolution of multi-angle polarized measurements made by the Directional Polarimetric Camera (DPC).The BPDF operational products of MICROPOL and POLDER measurements were used to validate the BPDF products of the DPC,with the results demonstrating that the BPDF product of the DPC measurements accurately expresses the surface polarized reflectance.The polarized reflectance of distinct surface types in the PRD region was studied using the DPC measurements.The results demonstrate that the polarized reflectances of different surface types differ and decrease as the normalized difference vegetation index increases.The polarized reflectance of a distinct surface type in the PRD region decreases with increasing scattering angle.The basic theory of investigating surface properties using multi-angle polarized measurements is proposed. 展开更多
关键词 Directional Polarimetric Camera bidirectional polarization distribution function AEROSOL POLDER normalized difference vegetation index MICROPOL
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