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Morphological classification and three-dimensional pore structure reconstruction of shale oil reservoirs: A case from the second member of Paleogene Kongdian Formation in the Cangdong Sag, Bohai Bay Basin, East China

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Petroleum Exploration and Development 2022年第5期49卷 1085-1097页

作者： FAN Yuchen LIU Keyu PU Xiugang zhao jianhua China University of Petroleum(East China) Qingdao 266580China Laboratory for Marine Mineral Resources Qingdao National Laboratory for Marine Science and TechnologyQingdao 266071China PetroChina Dagang Oilfield Company Tianjin 300280China

This study combines large volume three-dimensional reconstruction via focused ion beam scanning electron microscopy(FIB-SEM) with conventional scanning electron microscope(SEM) observation, automatic mineral identification and characterization system(AMICS) and large-area splicing of SEM images to characterize and classify the microscopic storage space distribution patterns and 3D pore structures of shales in the second member of the Paleogene Kongdian Formation(Kong 2) in the Cangdong Sag of the Bohai Bay Basin. It is shown that:(1) The Kong 2 Member can be divided into seven types according to the distribution patterns of reservoir spaces: felsic shale with intergranular micron pores, felsic shale with intergranular fissures, felsic shale with intergranular pores, hybrid shale with intergranular pores and fissures, hybrid shale with intergranular pores, clay-bearing dolomitic shale with intergranular pores, and clay-free dolomitic shale with intergranular pores.(2) The reservoir of the intergranular fracture type has better storage capacity than that of intergranular pore type. For reservoirs with storage space of intergranular pore type, the dolomitic shale reservoir has the best storage capacity, the hybrid shale comes second, followed by the felsic shale.(3) The felsic shale with intergranular fissures has the best storage capacity and percolation structure, making it the first target in shale oil exploration.(4) The large volume FIB-SEM 3D reconstruction method is able to characterize a large shale volume while maintaining relatively high spatial resolution, and has been demonstrated an effective method in characterizing the 3D storage space in strongly heterogeneous continental shales.

关键词： shale oil pore structure LV-FIB-SEM 3D reconstruction Paleogene Kongdian Formation Cangdong Sag Bohai Bay Basin

Study on Sealing Characteristics of Sliding Seal Assembly of Aircraft Hydraulic Actuator

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Instrumentation 2024年第1期11卷 18-29页

作者： Weinan Li Saixin Shi Hongxia Tang Liang Chen Jiawei Zhang Hao Tang jianhua zhao Shijiazhuang Haishan Industrial Development Corporation Shijiazhuang 050200 China Heavy Machinery Fluid Power Transmission and Control Laboratory Yanshan UniversityQinhuangdao 066004China

The hydraulic actuator,known as the"muscle"of military aircraft,is responsible for flight attitude adjustment,trajectory control,braking turn,landing gear retracting and other actions,which directly affect its flight efficiency and ***,the sealing assembly often has the situation of over-aberrant aperture fit clearance or critical over-aberrant clearance,which increases the failure probability and degree of movable seal failure,and directly affects the flight efficiency and safety of military *** this paper,the simulation model of hydraulic actuator seal combination is established by ANSYS software,and the sealing principle is *** change curve of contact width and contact pressure of combination seal under the action of high-pressure fluid is *** effects of different oil pressure,fit clearance and other parameters on the sealing performance are ***,the accelerated life test of sliding seal components is carried out on the hydraulic actuator accelerated life test rig,and the surface morphology is compared and *** research shows that the O-ring is the main sealing element and the role of the check ring is to protect and support the O-ring to prevent damage caused by squeezing into the fit clearance,so the check ring bears a large load and is prone to shear *** fit clearance is the main factor affecting the damage of the check ring,and the damage parts are mainly concentrated at the edge of the sealing *** paper provides a theoretical basis for the design of hydraulic actuator and the improvement of sealing performance.

关键词： hydraulic actuator contact stress sealing characteristics maximum shear stress

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Research on valve core’s clamping stagnation of double flapper-nozzle servo valve

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High Technology Letters 2019年第1期25卷 65-73页

作者： zhao jianhua Zhang Bin Chen Tao Wang Qiang Zhou Songlin Gao Dianrong Hebei Provincial Key Laboratory of Heavy Machinery Fluid Power Transmission and Control Yanshan University

Due to great changing of instantaneous temperature of hydraulic oil of double flapper-nozzle servo valve, thermal deformation between valve core and valve sleeve may result in catching phenomenon of valve core, and then the reliability of servo valve could be affected seriously. The work focuses on a particular model of double flapper-nozzle servo valve and establishes three dimension couple models of liquid-solid-thermal under extreme operating condition. The transmission route and dissipative mechanism of heat is revealed and thermal deformation behavior of valve core and valve sleeve is researched. A change law of the key fit clearance under the effect of thermal expansion and warp deformation is explored, the source of catching phenomenon of valve core is identified, and then preventive measure and improvement can be proposed. In order to verify the correctness of theoretical analysis, the moving smoothness of deformed valve core and reground valve core under the circumstance of high-temperature hydraulic oil on electrohydraulic servo valve static characteristics test table is compared and tested. The results show that as oil temperature rises, relative deformations between valve core and valve sleeve in different direction at a same cross-section are not equal, and then the key fit clearance is less than the initial value. Relative deformations in the same direction at different axial position are not equal, the deformations of middle and two ends are maximum and minimum values respectively, and then warp deformation of valve core occurs. When oil temperature is higher, the relative deformations between valve core and valve sleeve is larger, the moving smoothness of valve core gets worse, and the catching phenomenon of valve core occurs. Axial deformation of valve sleeve and valve core at different axial position is different, and the opening coefficient and stability of servo valve could be affected, especially the operation circumstance of small opening. The

关键词： double flapper-nozzle servo valve flow-solid-thermal coupling numerical simulation catching phenomenon thermal deformation mechanism smooth movement

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是否可能制造出室温下的磁性半导体?

科学通报 2016年第13期61卷 1401-1406页

作者：赵建华中国科学院半导体研究所半导体超晶格国家重点实验室北京100083

针对Science创刊125周年之际公布的125个最具挑战性的科学问题之一"是否可能制造出室温下的磁性半导体?"进行了解读.主要从传统电子学面临的严峻挑战出发,介绍了磁性半导体的基本概念、与普通半导体的区别以及在信息技术中可能发挥的重... 详细信息

针对Science创刊125周年之际公布的125个最具挑战性的科学问题之一"是否可能制造出室温下的磁性半导体?"进行了解读.主要从传统电子学面临的严峻挑战出发,介绍了磁性半导体的基本概念、与普通半导体的区别以及在信息技术中可能发挥的重要作用.本文以磁性元素掺杂的Zn O和Ga N为例介绍了实验中观察到的室温铁磁性的可能机制,并重点介绍了近年来关于典型磁性半导体(Ga,Mn)As的研究进展.最后针对室温下的磁性半导体研究进行了总结及展望.

关键词：磁性半导体居里温度室温铁磁性

Physical Mechanism of Organic Matter-Mineral Interaction in Longmaxi Shale,Sichuan Basin,China

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Acta Geologica Sinica(English Edition) 2016年第5期90卷 1923-1924页

作者： zhao jianhua JIN Zhijun JIN Zhenkui WEN Xin GENG Yikai College of Geosciences China University of Petroleum Beijing 102249 China State Key Laboratory of Shale Oil and Gas Enrichment Mechanisms and Effective Development Beijing 100083 China Petroleum Exploration andProduction Research Institute SINOPEC Beijing 100083 China Sinopec Key Laboratory of Shale Oil/Gas Exploration andProduction Beijing 100083 China

Objective Shale gas is as an important kind of unconventional natural gas,with a great resource potential,and its exploration and development has attracted much attention around the *** matter（OM）pores are a common ... 详细信息

关键词： OM Physical Mechanism of Organic Matter-Mineral Interaction in Longmaxi Shale,Sichuan Basin,China

Influence of Chemical Stability on the Fabrication of MnGa-based Devices

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Journal of Microelectronic Manufacturing 2019年第3期2卷 13-16页

作者： Lijun Zhu jianhua zhao State Key laboratory of Superlattice and microstructures Institute of Semiconductors Chinese Academy of Sciences Cornell University Ithaca New York 14850 USA

Ferromagnetic films of L10-ordered MnGa have shown promise not only in the applications in ultrahigh-density magnetic recording and spintronic memories,oscillators,and sensors,but also in controllable studies of novel electrical transport ***,the stability of MnGa in chemicals and oxygen plasma that are commonly used in the standard micronano-fabrication process has remained *** this work,we report a systematic study on the chemical stability of the MnGa films in acids,acetone,ethanol,deionized water,tetramethylammonium hydroxide (TMAOH) and oxygen *** find that MnGa is very stable in acetone and ethanol,while can be attacked substantially if soaked in TMAOH solution for sufficiently long *** water and acids (e.g.,HCl,H3PO4 and H2SO4 solutions) attack MnGa violently and should be avoided whenever *** addition,oxygen plasma can passivate the MnGa surface by oxidizing the *** results provide important information for the fabrication and the integration of MnGa based spintronic devices.

关键词： Chemical stability Perpendicular magnetic anisotropy Spintronics Wet etching

Electronic Transport Properties of Phenalenyl Molecular Devices via Gated Modulation

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Journal of Applied Mathematics and Physics 2021年第3期9卷 503-514页

作者： Xiaohui Jiang Wen Liu jianhua zhao Department of Physics and Information Engineering Jining University Qufu China

By applying nonequilibrium Green’s functions (NEGF) in combination with the density functional theory (DFT), we investigate the electronic transport properties of gated phenalenyl molecular devices with two different contact geometries. The calculated results show that electronic transport properties of the two different devices can be modulated by external transverse gates. When the molecule contacts the Au electrodes through two second-nearest sites, the current-voltage (I-V) characteristic curves are symmetric and suppressed by the gate electrodes. However, a rectifying behavior will occur when the electrodes connect the molecule on both sides, one second-nearest site and one third-nearest site, respectively. Mechanisms for such phenomena are proposed and these findings suggest a new opportunity for developing molecular devices.

关键词： Electronic Transport Transverse Gate Nonequilibrium Green’s Function Phenalenyl Molecular

Resonant enhancement of magnetic damping driven by coherent acoustic phonons in thin Co_(2)FeAl film epitaxied on GaAs

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Journal of Semiconductors 2021年第3期42卷 66-72页

作者： Lin Song Wei Yan Hailong Wang jianhua zhao Xinhui Zhang State Key Laboratory of Superlattices and Microstructures Institute of SemiconductorsChinese Academy of SciencesBeijing 100083China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China Laser Institute Qilu University of Technology(Shandong Academy of Sciences)Qingdao 266000China

The magnetic dynamics of a thin Co_(2)FeAl film epitaxially grown on GaAs substrate was investigated using the timeresolved magneto-optical Kerr measurement under an out-of-plane external *** intrinsic magnetic damping constant,which should do not vary with the external magnetic field,exhibits an abnormal huge increase when the precession frequency is tuned to be resonant with that of the coherent longitudinal acoustic phonon in the Co_(2)FeAl/GaAs *** experimental finding is suggested to result from the strong coherent energy transfer from spins to acoustic phonons via magnetoelastic effect under a resonant coupling condition,which leads to a huge energy dissipation of spins and a greatly enhanced magnetic damping in Co_(2)*** experimental findings provide an experimental evidence of spin pumping-like effect driven by propagating acoustic phonons via magnetoelastic effect,suggesting an alternative approach to the possible long-range spin manipulation via coherent acoustic waves.

关键词： magnetic damping coherent longitudinal acoustic phonons magnetoelastic effect long-range spin manipulation

Yak rumen microbiome elevates fiber degradation ability and alters rumen fermentation pattern to increase feed efficiency

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Animal Nutrition 2022年第4期11卷 201-214页

作者： Congcong zhao Lamei Wang Shanlin Ke Xinhua Chen Akos Kenez Wei Xu Dangdang Wang Fan Zhang Yong Li Zhanhong Cui Yu Qiao Jing Wang Wenjuan Sun jianhua zhao Junhu Yao Zhongtang Yu Yangchun Cao College of Animal Science and Technology Northwest A&F UniversityYanglingShaanxiChina Division of Gastroenterology Department of MedicineBeth Israel Deaconess Medical CenterHarvard Medical SchoolBostonMAUSA Channing Division of Network Medicine Brigham and Women's Hospital and Harvard Medical SchoolBostonMAUSA Department of Infectious Diseases and Public Health City University of Hong KongKowloonHong KongChina Qinghai Academy of Animal Husbandry and Veterinary Sciences Qinghai UniversityXiningQinghaiChina Department Animal Engineering Yangling Vocational&Technical CollegeYanglingShaanxiChina Shanghai Majorbio Bio-pharm Technology Co. Ltd.ShanghaiChina Department of Animal Sciences The Ohio State UniversityColumbusOHUnited States

Rumen microbes play an important role in ruminant energy supply and animal *** studies showed that yak(Bos grunniens)rumen microbiome and fermentation differ from other ***,little is understood about the features of the rumen microbiome that make yak adapted to their unique environmental and dietary *** study was to investigate the rumen microbiome and metabolome to understand how yak adapt to the coarse forage and harsh environment in the Qinghai-Tibetan *** female Qaidam yellow cattle(Bos taurus),9 dzomo(hybrids of cattle and yak)and 9 female plateau yak(***),about 5 to 6 years old,were used in this *** fermentation parameters,fibrolytic enzyme activities,and rumen metataxonomic were *** 18(6 samples per group)were selected for rumen metagenomic and metabolome *** analysis revealed that the rumen microbiota was significantly different among plateau yak,Qaidam yellow cattle,and dzomo(P<0.05).Metagenomic analysis displayed a larger gene pool encoding a richer repertoire of carbohydrate-active enzymes in the rumen microbiome of plateau yak and dzomo than Qaidam yellow cattle(P<0.05).Some of the genes encoding glycoside hydrolases that mediate the digestion of cellulose and hemicellulose were significantly enriched in the rumen of plateau yak than Qaidam yellow cattle,but glycoside hydrolase 57 that primarily includes amylases was abundant in Qaidam yellow cattle(P<0.05).The rumen fermentation profile differed also,Qaidam yellow cattle having a higher molar proportion of acetate but a lower molar proportion of propionate than dzomo and plateau yak(P<0.05).Based on metabolomic analysis,rumen microbial metabolic pathways and metabolites were *** metabolites are mainly amino acids,carboxylic acids,sugars,and bile *** in rumen microbial composition could explain the above *** present study showed that the rumen microbiome of plateau yak h

关键词： High plateau ruminant Rumen microbiome Metagenome Metabolome