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Proppant transport in rough fracture networks using supercritical CO_(2)

Petroleum Science 2024年第3期21卷 1852-1864页

作者： yong Zheng Meng-Meng Zhou Ergun Kuru Bin Wang Jun Ni Bing Yang Ke Hu Hai Huang Hai-Zhu Wang School of Petroleum Engineering Xi'an Shiyou UniversityXian710065ShaanxiChina Shaanxi Key Laboratory of Carbon Dioxide Sequestration and Enhanced Oil Recovery Xi'an710075ShaanxiChina State Key Laboratory of Petroleum Resources and Engineering China University of Petroleum(Beijing)Beijing2249China School of Mining and Petroleum Engineering University of AlbertaEdmontonTG2W2AlbertaCanad Shaanxi Yanchang Petroleum(Group)Co. Ltd.Xi'an710075ShaanxiChina

Proppant transport within fractures is one of the most critical tasks in oil,gas and geothermal reservoir stimulation,as it largely determines the ultimate performance of the operating *** transport in rough fracture networks is still a relatively new area of research and the associated transport mechanisms are still *** this study,representative parameters of rough fracture surfaces formed by supercritical CO_(2) fracturing were used to generate a rough fracture network model based on a spectral synthesis *** fluid dynamics(CFD)coupled with the discrete element method(DEM)was used to study proppant transport in this rough fracture *** reveal the turning transport mechanism of proppants into branching fractures at the intersections of rough fracture networks,a comparison was made with the behavior within smooth fracture networks,and the effect of key pumping parameters on the proppant placement in a secondary fracture was *** results show that the transport behavior of proppant in rough fracture networks is very different from that of the one in the smooth fracture *** turning transport mechanisms of proppant into secondary fractures in rough fracture networks are gravity-driven sliding,high velocity fluid suspension,and fracture structure *** the same injection conditions,supercritical CO_(2)with high flow Reynolds number still has a weaker ability to transport proppant into secondary fractures than *** of the supercritical CO_(2)needs to be increased beyond a certain value to have a significant effect on proppant carrying,and under the temperature and pressure conditions of this paper,it needs to be increased more than 20 times(about 0.94 m Pa s).Increasing the injection velocity and decreasing the proppant concentration facilitates the entry of proppant into the branching fractures,which in turn results in a larger stimulated reservoir *** results help to understand the pro

关键词： Reservoir stimulation CCUS Rough fracture network Supercritical CO_(2) Proppanttransport

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Surface decoration of mesocarbon microbeads with multifunctional TiNbO_(4-x)@C coating layer as high rate and stable anode of Li-ion batteries

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Rare Metals 2024年第5期43卷 2053-2066页

作者： Jia-Mei Lai Zhi-Min Zou Yu bai Yu-Tao Xing Chun-Hai Jiang Fujian Provincial Key Laboratory of Functional Materials and Applications Institute of Advanced Energy MaterialsSchool of Materials Science and EngineeringXiamen University of TechnologyXiamen 361024China Shanghai XFH Science and Technology Development Co. Ltd.Shanghai 200949China Fujian XFH New Energy Materials Co. Ltd.Yong'an 366000China Shenzhen XFH Science and Technology Co. Ltd.Shenzhen 518071China Laboratorio de Microscopia Eletronica de Alta Resolucao Centro de Caracterizagao Avangada Para a Industria de Petroleo(LaMAR/CAIPE)Universidade Federal FluminenseNiteroiRJ 24210-346Brazil

Surface modification of graphite anode with electroactive matters has been proven of a more practical strategy in enhancing the performance of Li-ion batteries than exploring alternative novel anode ***,rutile TiNbO_(4-x) nanoparticles with a tunnel structure are employed as multifunctional decoration substances in combination with a carbon coating layer to improve the rate and cycle properties of mesocarbon microbeads(MCMBs).As compared to pristine MCMB,the Li^(+)diffusion coefficients of the composite anodes are enhanced due to the synergistic effect of TiNbO_(4-x)@***,the overcharge and voltage polarization of the composite anodes at high rate are obviously minimized due to the current sharing effect of the high-potential TiNbO_(4-x).Moreover,the amorphous Li_(y)TiNbO_(4-x) converted from TiNbO_(4-x) in the initial lithiation process can deliver pseudocapacitive capacity to the composite anodes from the second *** of these functions of TiNbO_(4-x)@Ccoating layer have directly contributed to the improved rate and cycle performance of the MCMB/TiNbO_(4-x)@C composite *** one containing 12.0 wt%TiNbO_(4-x) exhibits a high reversible specific capacity of 118 m Ah·g^(-1)at 10C(1C=372 m A·g^(-1)),together with a high capacity retention of 90.9%after 300 cycles at 3C,which are all much superior to those of pristine MCMB.

关键词： Li-ion batteries MCMB TiNbO_(4-x)@C Surface decoration Rate capability

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Influence of IFNα-2b and BCG on the release of TNF and IL-1 by Kupffer cells in rats with hepatoma

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World Journal of Gastroenterology 2001年第3期7卷 419-421页

作者： xian yong bai~1 Xiu Hong Jia~2 Ling Zhong Cheng~3 Yun Di Gu~3 ~1Department of Histology and Embryology,Binzhou Medical College,Binzhou 256603,Shandong Province,China ~2Departrnent of Pediatrics,Binzhou Medical College,Binzhou 256603,Shandong Province,China ~3Department of Histology and Embryology,Shanghai Medical University,Shanghai 200032,ChinaDr.xian yong bai graduated from the Shanghai Medical University as a postgraduate in 1995,Professor of Histology and Embryology,specialized in hepatic tumor immunology,having 36 papers published. xian-yong bai Department of Histology and Embryology Binzhou Medical College Binzhou 256603 Shandong Province China Xiu-Hong Jia Department of Pediatrics Binzhou Medical College Binzhou 256603 Shandong Province China Ling-Zhong Cheng Yun-Di Gu Department of Histology and Embryology Shanghai Medical University Shanghai 200032 China

INTRODUCTIONKupffer cells are residential macrophages in the liver ,which play a critical role in the maintenance of normal liver function and in immunal surveilance of hepatocellular carcinoma (HCC) and other cancers[1].The biological immune modulants have cancers[2].In our previous studies ,the combined use of biological immune modulants showed better dffects .

关键词： gastrointestinal diseases/metabolism gastrins/analysis somatostatin/analysis G cells/secretion D cells/secretion

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Evaluation of the transfer function of human pulse system based on signal detection

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Chinese Science Bulletin 1999年第17期44卷 1566-1571页

作者： Binghe Wang Jinglin xiang yong Yang Liqin Zhi Wei Zheng Northwestern Polytech Univ Coll Marine Engn Xian 710072 Peoples R China xian Tradit Chinese Med Hosp Cardiovasc Sect Xian 710005 Peoples R China

On the basis of the pulse source-system model, a convenient and effective method used to evaluate the transfer function of human pulse system has been proposed by using the principle of signal detection and system analysis. The experimental results show that the pulse system of the normal pulse has 3 formants; the smooth pulse, 2 formants; the wiry pulse, 4 formants; and the thready pulse, only 1 formant. Formant frequencies reflect the resonance behaviour of the arterial system.

关键词： human pulse system (HPS) signal detection transfer function frequency characteristics formants.

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Behavior and Mechanisms of Deformation in Intermetallic Compound Al_(66) Mn_9Ti_(25) +La

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Journal of Rare Earths 2001年第3期19卷 198-203页

作者：陈铮刘兵傅云义王永欣 Northwestern Polytech Univ Sch Mat Sci & Engn Xian 710072 Peoples R China

The influence of lanthanum on the microstructure, deformed behavior, microcrack susceptibility of intermetallic compound Al 66 Mn 9Ti 25 was investigated. Adding lanthanum into intermetallic compound Al 66 Mn 9Ti 25 , the lattice parameters are not changed and the Ll 2 structure is maintained. At the same time, the dendritical grain and fine second phase are obtained, which inhibits the microcrack initiation and intergranular failure. On the other hand, the movability of dislocation is enhanced and the compressive ductility is improved. The mechanism about the role of lanthanum in intermetallic compound Al 66 Mn 9Ti 25 was discussed.

关键词： rare earths Al-Mn-Ti intermetallic compound lanthanum microstructure deformed behavior

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Influence of Electric Field on Mechanical Properties of Al-Li Alloy Containing Cerium and Electronic Mechanism

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Journal of Rare Earths 2001年第2期19卷 97-102页

作者：刘兵陈铮王永欣王西宁 Northwestern Polytech Univ Dept Mat Sci & Engn Xian 710072 Peoples R China

The effect of electric field on the mechanical properties and microstructure of AI-Li alloy containing Ce was investigated, and mechanism was discussed. The experimental results show that the ductility of the alloy is enhanced by the electric field. The fracture features are changed and the precipitates are dispersed under the effect of the electric field. The mechanism discussion reveals that the effects of the electric field on the alloy are due to the change of the electron density in the alloy.

关键词： rare earths electric field mechanical property fracture feature precipitates electron density

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Effect of metal powders on explosion of fuel-air explosives with delayed secondary igniters

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Defence Technology（防务技术） 2021年第3期17卷 785-791页

作者： yong-xu Wang Yi Liu Qi-ming Xu Bin Li Li-feng Xie School of Chemical Engineering Nanjing University of Science and TechnologyNanjingJiangsu210094PR China xian Modern Chemistry Research Institute XianShaanxi710065PR China China Research and Development Academy of Machinery Equipment Beijing100089PR China

In order to improve the energy level of fuel air explosive(FAE) with delayed secondary igniters, high energetic metal powders were added to liquid fuels mainly composed of ether and isopropyl *** powders’ explosive properties and reaction mechanisms in FAE were studied by high-speed video,pressure test system, and infrared thermal imager. The results show that compared with pure liquid fuels, the shock wave overpressure, maximum surface fireball temperature and high temperature duration of the mixture were significantly increased after adding high energetic metal powder. The overpressure values of the liquid-solid mixture at all measuring points were higher than that of the pure liquid fuels. And the maximum temperature of the fireball was up to 1700C, which was higher than that of the pure liquid fuels. After replacing 30% of aluminum powder with boron or magnesium hydride, the shock wave pressure of the mixture was further increased. The high heat of combustion of boron and the hydrogen released by magnesium hydride could effectively increase the blast effect of the mixture. The improvement of the explosion performance of boron was better than magnesium hydride. It shows that adding high energetic metal powder to liquid fuels can effectively improve the explosion performance of FAE.

关键词： Fuel air explosive Aluminum powder Boron Magnesium hydride Explosion performance

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Accelerating degradation rate of pure iron by zinc ion implantation

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Regenerative Biomaterials 2016年第4期3卷 205-215页

作者： Tao Huang Yufeng Zheng yong Han State Key Laboratory for Turbulence and Complex System and Department of Materials Science and Engineering College of EngineeringPeking UniversityBeijing 100871China State Key Laboratory for Mechanical Behavior of Materials Xian Jiaotong UniversityXian 710049China

Pure iron has been considered as a promising candidate for biodegradable implant ***,a faster degradation rate of pure iron is needed to meet the clinical *** this work,metal vapor vacuum arc technology was adopted to implant zinc ions into the surface of pure *** showed that the implantation depth of zinc ions was about 60 *** degradation rate of pure iron was found to be accelerated after zinc ion *** cytotoxicity tests revealed that the implanted zinc ions brought a slight increase on cytotoxicity of the tested *** terms of hemocompatibility,the hemolysis of zinc ion implanted pure iron was lower than 2%.However,zinc ions might induce more adhered and activated platelets on the surface of pure ***,zinc ion implantation can be a feasible way to accelerate the degradation rate of pure iron for biodegradable applications.

关键词： biodegradable metals iron zinc ion implantation biocompatibility

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Metabolic dysfunction associated fatty liver disease: The new nomenclature and its impact

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World Journal of Gastroenterology 2023年第3期29卷 549-560页

作者： Si-Ying Tang Jian Shiun Tan xian-Zheng Pang Guan-Huei Lee Division of Gastroenterology and Hepatology National University HospitalSingapore 119228Singapore yong Loo Lin School of Medicine Singapore 117597Singapore

BACKGROUND In 2020,an international expert panel proposed a new definition of fatty liver:Metabolic dysfunction-associated fatty liver disease(MAFLD).The MAFLD added the criteria for defining metabolic dysfunctions,which are high-risk factors for liver-related and cardiovascular *** to the non-alcoholic fatty liver disease(NAFLD)definition,it allows the coexistence of MAFLD and significant alcohol use in the same *** To review the existing data that evaluate the clinical profile and long-term outcome difference between the patients identified as MAFLD and *** Databases MEDLINE via PubMed and EMBASE were searched and relevant publications up to June 28,2022 were *** were included if they involved human participants diagnosed with *** A total of 2324 records were reviewed,of which 1575 duplicate citations were *** the 2324 records screened,207 articles were excluded,and 542 articles were assessed for their eligibility,for which 511 were *** remaining 31 articles were selected for *** diagnostic criteria were able to identify more individuals with fatty *** have shown that patients included using the MAFLD criteria were associated with higher risks of hepatic fibrosis when compared to ***-cause mortality,cardiovascular diseaserelated,and cancer-related mortality were shown to be higher in MAFLD *** patients also had higher baseline metabolic derangement,and risks of developing obesity,diabetes,and cardiovascular *** the 3 subtypes,diabetes mellitus has the strongest association with negative outcomes,followed by metabolic dysfunction and elevated body mass *** the subtypes of MAFLD,patients with more metabolic conditions at the time of diagnosis had worse hepatic and liver injury compared to those with a single metabolic *** MAFLD is a new definition of fatty liver disease that is gaining increasing *** is based on empirical

关键词： Hepatic steatosis Liver fibrosis Cardiovascular events Alcohol liver disease Obesity

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Expression and alterations of different molecular form γ-glutamyl transferase and total RNA concentration during the carcinogenesis of rat hepatoma

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World Journal of Gastroenterology 1999年第4期5卷 84-86页

作者： TANG Qi Yun, YAO Deng Fu, LU Jian Xin, WU Xin Hua and MENG xian yong Qi-Yun Tang Deng-Fu Yao Jian-Xin Lu Xin-Hua Wu Xian-Yong Meng Department of Gastroenterology and Research Center of Clinical Molecular Biology Affiliated Hospital Nantong Medical College Nantong 226001 Jiangsu Province China

ＩＮＴＲＯＤＵＣＴＩＯＮＣａｒｃｉｎｏｇｅｎｅｓｉｓｉｓｃｌｏｓｅｌｙｒｅｌａｔｅｄｗｉｔｈＤＮＡｓｙｎｔｈｅｓｉｓａｎｄｈｙｐｅｒｍｅｔａｂｏｌｉｓｍｏｆｎｕｃｌｅｉｃａｃｉｄ．γｇｌｕｔａｍｙｌｔｒａｎｓｆｅｒ... 详细信息

ＩＮＴＲＯＤＵＣＴＩＯＮＣａｒｃｉｎｏｇｅｎｅｓｉｓｉｓｃｌｏｓｅｌｙｒｅｌａｔｅｄｗｉｔｈＤＮＡｓｙｎｔｈｅｓｉｓａｎｄｈｙｐｅｒｍｅｔａｂｏｌｉｓｍｏｆｎｕｃｌｅｉｃａｃｉｄ．γｇｌｕｔａｍｙｌｔｒａｎｓｆｅｒａｓｅ（ＧＧＴ，ＥＣ２．３．２．２...

关键词： liver neoplasms/enzymology γ glutamyl transferase/analysis disease models, animal RNA 2 fluoenyacetamide/analysis

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