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New model of linkage evolution for the transtensional fault systems in the Nanpu Sag of Bohai Bay Basin: Insight from seismic interpretation and analogue modelling

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Petroleum Science 2024年第4期21卷 2287-2310页

作者： Yu-Heng Wang fu-Sheng Yu Bao-Yin Zhao Ling-Jian Meng College of Geosciences China University of Petroleum (Beijing) State Key Laboratory of Petroleum Resources and Prospecting China University of Petroleum (Beijing) Jidong Oilfield Company PetroChina Limited Company

The evolution of faults within the same stress field is frequently influenced by numerous factors,involving the reactivation of pre-existing structures, stress transmission through ductile detachment layers, and the growth, interaction, as well as linkage of new fault segments. This study analyses a complex multi-phase oblique extension fault system in the Nanpu Sag(NPS) of the Bohai Bay Basin(BBB),china. High-resolution three-dimensional(3D) seismic data and analogue modelling indicate that the oblique extensional reactivation of pre-existing structures governs the sequential arrangement of fault segments in the caprock, and they dip synthetically to the reactivated fault at depth. During the NW-SE extension in the Eocene, the predominant movement of the pre-existing fault is strike-slip. Subsequently,during the N-S extension since the Oligocene, inclined at *** the pre-existing fault, forming splay fault segments and ultimately creating large en-echelon arcuate faults linked by relay ramps. Using fault throw-distance(T-D) and laser scanning, we reconstructed the fault evolution model of oblique extension reactivation in the presence of a ductile detachment basement. Our study illustrates that the arcuate faults can be categorized into linear master fault segments controlled by pre-existing structures, bending splay faults in the termination zone, and normal fault segments responding to the regional stress *** interaction between faults occurs among normal faults and strike-slip faults, and the kinematic unification of the two fault systems is accomplished in the intersection zone. As the faults continue to evolve, the new fault segments tend to relinquish the control of pre-existing structures and concentrate more on the development of planar and continuous major faults. The ductile detachment layer significantly contributes to the uniform distribution of strain, resulting in narrow shear zones and discontinuous normal faults in its absence.

关键词： Analogue modelling Transtensional deformation Fault linkage Fault intersection zone Nanpu Sag of Bohai Bay basin

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Distribution patterns of snow finches （Montifringilla spp.） in the Tibetan Plateau of china

Distribution patterns of snow finches （Montifringilla spp....

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23rd International Ornithological Congress

作者： Qu Yan-Hua Lei fu-Min Yin Zuo-HuaInstitute of Zoology chinese academy of sciences beijing 100080 china

＜正＞ Data from specimen collections and field records from the Tibetan Plateau were used to investigate the distribution patterns of species of Montifringilla. By plotting specimen localities against latitude and elevation, we found that the distribution ranges of six species overlapped greatly in the altitudinal range of about 2500m to 4500m and the latitude range of about N26?to N38?more than one species had been collected at 28 of 71

关键词： snow finches distribution pattern Tibetan Plateau

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Collision Detection for a Kind of Haptic Interface

Collision Detection for a Kind of Haptic Interface

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全国第十五届计算机科学与技术应用学术会议

作者： Chun Xu Haibing Zhu Kui Yuan Yujin fu (Institute of Automation chinese academy of sciences, beijing china 100080)

＜正＞In this paper, a new collision detection method, which is based on OBB-AABB bounding volume and can detect collisions between a virtual hand and VE efficiently, is presented. This new method adopts the advantages of OBB （oriented bounding box） and AABB （axis-aligned bounding box）. It uses OBB and AABB to bound the virtual hand and virtual objects respectively according to the models’ character. This method, based on Liang-Barsky clipping algorithm, has been implemented using "force-sensing glove", a haptic glove. Experiments show that the newly proposed method enables the system to detect collisions between a virtual hand and virtual objects effectively. And users can get a quite real feeling of force feedback when interacting with the virtual environment using a force-sensing glove.

关键词： collision detection bounding volumes OBB AABB haptic interaction

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Recursive Identification for Multidimensional ARMA Processes with Increasing Variances

Recursive Identification for Multidimensional ARMA Processes...

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第二十三届中国控制会议

作者： Han-fu Chen (Institute of Systems Science, AMSS, chinese academy of sciences, beijing 100080)

＜正＞ In time series analysis almost all existing results are derived for the case where the driven noise {wn} in the MA part is with bounded variance （or conditional variance）. In contrast to this, the paper discusses how to identify coefficients in a multidimensional ARMA process with fixed orders, but in its MA part the conditional moment E（||wn||β| fn-1）,β＞ 2, is possible to grow up at a rate of a power of logn. The well-known stochastic gradient （SG） algorithm is applied to estimate the matrix coefficients of the ARMA process, and the reasonable conditions are given to guarantee the estimate to be strongly consistent.

关键词： Multidimensional ARMA increasing variance recursive estimation martingale difference sequence.

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Compact difference approximation with consistent boundary condition

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Progress in Natural Science:Materials International 2003年第10期 10-15页

作者： fu Dexun*, MA Yanwen, LI Xinliang and LIU Mingyu(Laboratory of Nonlinear Mechanics, Institute of Mechanics, chinese academy of sciences, beijing 100080, china) Laboratory of Nonlinear Mechanics Institute of Mechanics Chinese Academy of Sciences Beijing 100080 China

For simulating multi scale complex flow fields it should be noted that all the physical quantities we are interested in must be simulated well. With limitation of the computer resources it is preferred to use high order accurate difference schemes. Because of their high accuracy and small stencil of grid points computational fluid dynamics (CFD) workers pay more attention to compact schemes recently. For simulating the complex flow fields the treatment of boundary conditions at the far field boundary points and near far field boundary points is very important. According to authors’ experience and published results some aspects of boundary condition treatment for far field boundary are presented, and the emphasis is on treatment of boundary conditions for the upwind compact schemes. The consistent treatment of boundary conditions at the near boundary points is also discussed. At the end of the paper are given some numerical examples. The computed results with presented method are satisfactory.

关键词： complex flow fields numerical simulation boundary conditions upwind compact scheme.

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Stochastic Approximation with Non-Additive Measurement Noise

Stochastic Approximation with Non-Additive Measurement Noise

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1997年中国控制会议

作者： Han-fu CHEN Laboratory of Systems & Control, Institute of Systems Science, The chinese academy of sciences, beijing 100080, china.

＜正＞The Robbins-Monro algorithm with randomly varying truncations for measurements with non-additive noise is considered. Assuming that the function under observation is locally Lipschitz-continuous in its first argument and the noise is a （?）-mixing process, strong consistency of the estimate is shown. Neither growth rate restriction on the function, nor the decreasing rate of the mixing coefficients are required.

关键词： Stochastic approximation non-additive noise randomly varying truncation

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A new role for T cells in dampening innate inflammatory responses

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Science china(Life sciences) 2010年第2期53卷 190-194页

作者： TANG Hong1 & fu YangXin1,2 1 Key Laboratory of Infection and Immunity,Institute of Biophysics,chinese academy of sciences,beijing 100101,china 2 Department of Pathology,Committee of Immunology,University of Chicago,Chicago,IL 60637,USA 1. Key Laboratory of Infection and Immunity Institute of Biophysics Chinese Academy of Sciences Beijing 100101 China2. Department of Pathology Committee of Immunology University of Chicago Chicago IL 60637 USA

The inflammatory response is an attempt by a host to protect itself against injurious stimuli and initiate the tissue healing process [1,2]. Although the production of both pro-and anti-inflammatory mediators which oc... 详细信息

关键词： cell BTLA A new role for T cells in dampening innate inflammatory responses NLRP

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五轴框架式机器人激光加工系统轨迹算法研究

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中国激光 2003年第4期30卷 364-368页

作者：涂孟夫虞钢中国科学院力学研究所北京100080

在集成化智能激光加工系统工作原理的基础上提出了五轴机器人的激光加工轨迹算法。将三维离散数据点集拟合为空间参数曲面 ,在此参数曲面上规划五轴激光加工的等距轨迹。给出了冲压模具激光强化加工实例 ,取得了理想的加工效果。

关键词：激光加工五轴机器人 CIMS 轨迹算法

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Electrical Properties and Phase Transition of CoFe2O4 and ZnFe2O4 Nanocrystals under Pressure

Electrical Properties and Phase Transition of CoFe2O4 and Zn...

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2003年纳米和表面科学与技术全国会议

作者： Zhenyu Wu, Yuping He, Maiming Fan, Limin fu, Cuixia Liu, Bingsuo Zou Nanoscale physics & device LAB, Institute of physics, chinese academy of sciences, beijing 100080, china

Electric resistances of different-sized CoFe2O4 and nanocrystals by the co-precipitation method were investigated under pressure up to 20 GPa in a diamond anvil cell (DAC) at ambient temperature. The experimental results indicate that phase transition of CoFe2O4 (from the spinel to the tetragonal) takes place at 7.5GPa and 12.5GPa for 6nm and 80nm, respectively, in agreement with the prediction of scaling theory of the phase transition of

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Advances in carbon flux observation and research in Asia

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Science china Earth sciences 2005年第Z1期48卷 1-16页

作者： YU Guirui, ZHANG Leiming, SUN Xiaomin, fu Yuling & LI Zhengquan Synthesis Center of chinese Ecosystem Research Network (CERN), Institute of Geographic sciences and Natural Resources Research, chinese academy of sciences, beijing 100101, china Graduate School of the chinese academy of sciences, beijing 100039, china Synthesis Center of chinese Ecosystem Research Network CERN Institute of Geographic Sciences and Natural Resources Research Chinese Academy of Sciences Beijing 100101 China Synthesis Center of chinese Ecosystem Research Network (CERN) Institute of Geographic Sciences and Natural Resources Research Chinese Academy of Sciences Beijing 100101 China Graduate School of the chinese academy of sciences Beijing 100039 China

As an important component of FLUXNET, Asia is increasingly becoming the hotspot in global carbon research for its vast territory, complex climate type and vegetation diversity. The present three regional flux observation networks in Asia (i.e. AsiaFlux, KoFlux and chinaFLUX)have 54 flux observation sites altogether, covering tropic rainforest, evergreen broad-leaved forest, broad-leaved and coniferous mixed forest, shrubland, grassland, alpine meadow and cropland ecosystems with a latitudinal distribution from 2°N to 63°N. Long-term and continuous fluxes of carbon dioxide, water vapor and energy between the biosphere and atmosphere are mainly measured with eddy covariance technique to (1) quantify and compare the carbon, water and energy budgets across diverse ecosystems; (2) quantify the environmental and biotic controlling mechanism on ecosystem carbon, water and energy fluxes; (3) validate the soil-vegetation-atmosphere model; and (4) serve the integrated study of terrestrial ecosystem carbon and water cycle. Over the last decades, great advancements have been made in the theory and technology of flux measurement, ecosystem flux patterns, simulation and scale conversion by Asian flux community. The establishment of chinaFLUX has greatly filled the gap of flux observation and research in Eurasia. To further promote the flux measurement and research,accelerate data sharing and improve the data quality, it is necessary to present a methodological system of flux estimation and evaluation over complex terrain and to develop the integrated research that combines the flux measurement, stable isotope measurement, remote sensing observation and GIS technique. It also requires the establishment of the Joint Committee of Asian Flux Network in the Asia-Pacific region in order to promote the cooperation and communication of ideas and data by supporting project scientists, workshops and visiting scientists.

关键词： terrestrial ecosystem, flux observation and research, carbon flux, eddy covariance, Asia.

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