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Study of inter-well interference in shale gas reservoirs by a robust production data analysis method based on deconvolution

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Petroleum Science 2024年第4期21卷 2502-2519页

作者： Wen-Chao Liu Cheng-Cheng Qiao Ping Wang Wen-Song Huang Xiang-Wen Kong Yu-Ping Sun he-dong Sun Yue-Peng Jia School of Civil and Resource Engineering University of Science and Technology BeijingBeijing100083PR China PetroChina Research Institute of Petroleum Exploration and Development Beijing100083PR China

In order to overcome the defects that the analysis of multi-well typical curves of shale gas reservoirs is rarely applied to engineering,this study proposes a robust production data analysis method based on deconvolution,which is used for multi-well inter-well interference *** this study,a multi-well conceptual trilinear seepage model for multi-stage fractured horizontal wells was established,and its Laplace solutions under two different outer boundary conditions were ***,an improved pressure deconvolution algorithm was used to normalize the scattered production ***,the typical curve fitting was carried out using the production data and the seepage model ***,some reservoir parameters and fracturing parameters were interpreted,and the intensity of inter-well interference was *** effectiveness of the method was verified by analyzing the production dynamic data of six shale gas wells in Duvernay *** results showed that the fitting effect of typical curves was greatly improved due to the mutual restriction between deconvolution calculation parameter debugging and seepage model parameter ***,by using the morphological characteristics of the log-log typical curves and the time corresponding to the intersection point of the log-log typical curves of two models under different outer boundary conditions,the strength of the interference between wells on the same well platform was well *** work can provide a reference for the optimization of well spacing and hydraulic fracturing measures for shale gas wells.

关键词： Shale gas Inter-well interference Deconvolution Production data analysis Typical curves Multi-stage fractured horizontal well

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Electronic Coupling of Single Atom and FePS_3 Boosts Water Electrolysis

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Energy & Environmental Materials 2022年第3期5卷 899-905页

作者： Chongyang Tang dong he Nan Zhang Xianyin Song Shuangfeng Jia Zunjian Ke Jiangchao Liu Jianbo Wang Changzhong Jiang Ziyu Wang Xiaoqing Huang Xiangheng Xiao School of Physics and Technology Wuhan UniversityWuhan 430072China The Key Laboratory of Synthetic and Biological Colloids Ministry of EducationSchool of Chemical and Material EngineeringJiangnan UniversityWuxi 214122China Institute of Technological Sciences Wuhan UniversityWuhan 430072China State Key Laboratory of Physical Chemistry of Solid Surfaces College of Chemistry and Chemical EngineeringXiamen UniversityXiamen 361005China

Engineering the electronic structure of surface active sites at the atomic level can be an efficient way to modulate the reactivity of ***,we report the rational tuning of surface electronic structure of FePS_(3) nanosheets(NSs)by anchoring atomically dispersed metal *** calculations predict that the strong electronic coupling effect in single-atom Ni-FePS_(3) facilitates electron aggregation from Fe atom to the nearby Ni-S bond and enhances the electron-transfer of Ni and S sites,which balances the oxygen species adsorption capacity,reinforces water adsorption and dissociation process to accelerate corresponding oxygen evolution reaction(OER)and hydrogen evolution reaction(heR).The optimal Ni-FePS_(3)NSs/C exhibits outstanding electrochemical water-splitting activities,delivering an overpotential of 287 mV at the current density of 10 mA cm^(-2) and a Tafel slope of 41.1 mV dec^(-1) for OER;as well as an overpotential decrease of 219 mV for heR compared with pure FePS_(3)NSs/*** concept of electronic coupling interaction between the substrate and implanted single active species offers an additional method for catalyst design and beyond.

关键词： electronic coupling iron thiophosphates nanosheet single atom water electrolysis

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Ectopic osteogenesis and scaffold biodegradation of tissue engineering bone composed of chitosan and osteo-induced bone marrow mesenchymal stem cells in vivo

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Chinese Medical Journal 2014年第2期127卷 322-328页

作者： he Yiqun dong Youhai Chen Xujun Lin Rongqiang Department of Orthopaedic Surgery the Fifth People's Hospital of Shanghai Fudan University Shanghai 200240 China

Background Chitosan （CS） scaffolds combined with osteogenically induced bone marrow mesenchymal stem cells （BMSCs） have been proved to be promising substitutes for repairing bone ***,the bone-forming and scaffold-biodegrading processes are seldom *** study aimed to determine the osteogenic ability of CS/osteoinduced BMSC composites by observing the bone-forming process and explore the relationship between bone formation and scaffold *** The CS/osteo-induced BMSC composites （CS＋cells group） and the CS scaffolds （CS group） were,respectively,implanted into SD rat thigh *** 2,4,6,8,and 12 weeks postoperatively,the rat femurs were scanned by CT,and the CT values of the implants were measured and comparatively ***,the implants were harvested and stained with hematoxylin and eosin and Masson trichrome,and the percentages of bone area,scaffold area,and collagen area were calculated and compared between the two *** The imaging results showed that the densities of implants of the two groups gradually increased along with time,but the CT values of implants in the CS＋cells group were much higher than in the CS group at the same time point （P ＜0.05）.The histological results showed that the de novo bone and collagen formed in the pores of the scaffolds and gradually increased since 2 weeks postoperation in both groups,and the scaffold gradually degraded along with the boneforming ***,the comparative analysis results showed that the CS＋cells group gained more de novo bone and collagen formation and had less scaffold than the CS group at the same time point （P ＜0.05）.Conclusion The CS/osteo-induced BMSC composites are excellent bone tissue engineering substitutes,and the scaffold biodegradation is accordant with the bone formation.

关键词： ectopic osteogenesis chitosan biodegradation bone marrow mesenchymal stem cells

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Stability of Sn-Pb mixed organic–inorganic halide perovskite solar cells:Progress,challenges,and perspectives

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Journal of Energy Chemistry 2022年第2期31卷 371-404页

作者： Shaoshen Lv Weiyin Gao Yanghua Liu he dong Nan Sun Tingting Niu Yingdong Xia Zhongbin Wu Lin Song Chenxin Ran Li Fu Yonghua Chen Frontiers Science Center for Flexible Electronics Xi’an Institute of Flexible Electronics(IFE)and Xi’an Institute of Biomedical Materials&EngineeringXi’an 710072ShaanxiChina Key Laboratory of Flexible Electronics(KLOFE)&Institution of Advanced Materials(IAM) Nanjing Tech University(NanjingTech)Nanjing 211816JiangsuChina School of Materials Science and Engineering Northwestern Polytechnical UniversityXi’an 710072ShaanxiChina

The exploration of low bandgap perovskite material to approach Shockley-Queisser limit of photovoltaic device is of great significance,but it is still *** the past few years,tin–lead(Sn-Pb)mixed perovskites with low bandgaps have been rapidly developed,and their single junction solar cells have reached power conversion efficiency(PCE)over 21%,which also makes them ideal candidate as low bandgap sub-cell for tandem ***,due to the incorporation of unstable Sn^(2+),the stability issue becomes the vital problem for the further development of Sn-Pb mixed perovskite solar cells(PSCs).In this review,we are dedicated to give a full view in current understanding on the stability issue of SnPb mixed perovskites and their *** begin with the demonstration on the origin of instability of Sn-Pb mixed perovskites,including oxidation of Sn^(2+),defects,and interfacial layer induced ***,the up-to-date developments on the stability improvement of Sn-Pb mixed perovskites and their PSCs is systematically reviewed,including composition engineering,additive engineering,and interfacial *** last,the current challenges and future perspectives on the stability study of Sn-Pb mixed PSCs are discussed,which we hope could promote the further application of Sn-Pb mixed perovskites towards commercialization.

关键词： Sn-Pb mixed perovskites Stability Interfacial defects Energy level mismatch Solar cells

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cNPAS2 inducedβcell dysfunction by regulating KANK1 expression in type 2 diabetes

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World Journal of Diabetes 2024年第9期15卷 1932-1941页

作者： Yan-Bin Yin Wei Ji Ying-Lan Liu Qian-Hao Gao dong-dong he Shi-Lin Xu Jing-Xin Fan Li-Hai Zhang Department of General Surgery The First Affiliated Hospital of Jiamusi UniversityJiamusi 154000Heilongjiang ProvinceChina Department of Anesthesiology Yantai Affiliated Hospital of Binzhou Medical UniversityYantai 264199Shandong ProvinceChina Operating Room The First Affiliated Hospital of Jiamusi UniversityJiamusi 154000Heilongjiang ProvinceChina Department of Anesthesiology Huazhong University of Science and Technology Union Jiangbei HospitalWuhan 430100Hubei ProvinceChina Department of Endocrinology The First Affiliated Hospital of Jiamusi UniversityJiamusi 154000Heilongjiang ProvinceChina

BACKGROUND Diabetes mellitus type 2(T2DM)is formed by defective insulin secretion with the addition of peripheral tissue resistance of insulin *** has been affecting over 400 million people all over the *** To explore the pathogenesis of T2DM and to develop and implement new prevention and treatment strategies for *** Receiver operating characteristic(ROC)curve analysis was used to conduct diagnostic *** expression level of genes was determined by reverse transcription-PCR as well as Western *** proliferation assays were performed by cell counting kit-8(CCK-8)*** last,T2DM mice underwent Roux-en-Y gastric bypass *** We found that NPAS2 was significantly up-regulated in isletβcell apoptosis of *** ROC curve revealed that NPAS2 was capable of accurately diagnosing ***2 overexpression did increase the level of *** addition,the CCK-8 test revealed knocking down NPAS2 and KANK1 increased the proliferation of MIN6 *** last,we found that gastric bypass may treat type 2 diabetes by down-regulating NPAS2 and *** This study demonstrated that NPAS2 inducedβcell dysfunction by regulating KANK1 expression in type 2 diabetes,and it may be an underlying therapy target of T2DM.

关键词： Diabetes mellitus type 2 KANK1 NPAS2 Gastric bypass

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Association of metabolic syndromes and risk factors with ampullary tumors development: A case-control study in China

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World Journal of Gastroenterology 2014年第28期20卷 9541-9548页

作者： Xiao-dong he Qiao Wu Wei Liu Tao Hong Jing-Jing Li Ruo-Yu Miao Hai-Tao Zhao Department of General Surgery Peking Union Medical College HospitalChinese Academy of Medical Sciences and Peking Union Medical College Department of Liver Surgery Peking Union Medical College HospitalChinese Academy of Medical Sciences and Peking Union Medical College

AIM: To evaluate the risk factors for ampullary adenoma and ampullary cancer.

关键词： Metabolic syndromes Ampullary adenoma Ampullary cancer Risk factors

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Intrinsic defects of nonprecious metal electrocatalysts for energy conversion: Synthesis, advanced characterization, and fundamentals

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ChemPhysMater 2022年第3期1卷 155-182页

作者： Menghua Yang Jiangchao Liu Hang Xu Yongfeng Pei Changzhong Jiang dong he Xiangheng Xiao Department of Physics Hubei Nuclear Solid Physics Key LaboratoryWuhan UniversityWuhan 430072China Hubei Yangtze Memory Laboratories Wuhan 430205China

With the depletion of fossil fuels and environmental pollution, energy storage and conversion have become the focus of current research. Water splitting and fuel cell technologies have made outstanding contributions to energy conversion. However, the oxygen evolution reaction (OER) and oxygen reduction reaction (ORR) have slow kinetics, which limit the capacity of fuel cells. It is of great significance to develop catalysts for the OER and ORR and continuously improve their catalytic performance. Many studies have shown that intrinsic defects, especially vacancies (anion and cation vacancies), can effectively improve the efficiency of electrochemical energy storage and conversion. The introduction of intrinsic defects can generally expose more active sites, enhance conductivity, adjust the electronic state, and promote ion diffusion, thereby enhancing the catalytic performance. This review comprehensively summarizes the latest developments regarding the effects of intrinsic defects on the performance of non-noble metal electrocatalysts. According to the type of intrinsic defect, this article reviews in detail the regulation mechanism, preparation methods and advanced characterization techniques of intrinsic defects in different materials (oxides, non-oxides, etc.). Then, the current difficulties and future development of intrinsic defect regulation are analyzed and discussed thoroughly. Finally, the prospect of intrinsic defects in the field of electrochemical energy storage is further explored.

关键词： Intrinsic defects Anion vacancies Cation vacancies Transition metal-based materials Electrochemical energy conversion

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Effects of Ginseng Fruit Saponins on Serotonin System in Sprague-Dawley Rats with Myocardial Infarction, Depression, and Myocardial Infarction Complicated with Depression

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Chinese Medical Journal 2016年第24期129卷 2913-2919页

作者： dong-Fang he Yan-Ping Ren Mei-Yan Liu Department of Cardiology Beijing Anzhen Hospital Affiliated to Capital Medical University Beijing 100029 China Geriatric-cardiovascular Department First Affiliated Hospital of Xi'an Jiaotong University Xi'an Shaanxi 710061 China

Background： Our previous studies have demonstrated that the levels of 5-hydroxytryptamine （5-HT） and 5-HT 2A receptor （5-HT2AR） in serum and platelet were associated with depression and myocardial infarction （MI）, and pretreatment with ginseng fruit saponins （GFS） before MI and depression had an effect on the 5-HT system. In this study, the effects of GFS on the 5-HT system in the Sprague-Dawley （SD） rats with MI, depression, and MI ＋ depression were evaluated. Methods： A total of eighty SD rats were allocated to four groups： MI, depression, MI ＋ depression, and control groups （n = 20 in each group）. Each group included two subgroups （n = 10 in each subgroup）： Saline treatment subgroup and GFS treatment subgroup. The levels of 5-HT, 5-HT2AR, and serotonin transporter （SERT） were quantified in serum, platelet lysate, and brain tissue through the enzyme-linked immunosorbent assay method, respectively. Results： Compared with those in the saline treatment subgroups, the levels of 5-HT in serum and platelet lysate statistically significantly increased in the GFS treatment subgroups of MI, depression, and MI ＋ depression groups （serum： all P = 0.000; platelet lysate： P = 0.002, 0.000, 0.000, respectively）. However, the 5-HT levels in brain homogenate significantly decreased in the GFS treatment subgroups compared with those in the saline treatment subgroups in MI and depression groups （P = 0.025 and 0.044 respectively）, and no significant difference was observed between saline and GFS treatment subgroups in MI ＋ depression group （P = 0.663）. Compared with that in GFS treatment subgroup of control group, the 5-HT2AR levels in the platelet lysate significantly decreased in GFS treatment subgroups of MI, depression, and MI ＋ depression groups （all P = 0.000）. Compared to those in the saline treatment subgroups, the serum SERT levels significantly decreased in the GFS treatment subgroups in MI, depression, and MI ＋ depression groups （P = 0.009, 0.038, and P = 0.001, respectiv

关键词： 5-hydroxytryptamine 2A Receptor Depression Ginseng Fruit Saponins 5-hydroxytryptamine Myocardial Infarction Serotonin Transporter

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矿用对旋轴流式主通风机机壳有限元分析

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煤炭学报 2005年第3期30卷 378-382页

作者：贺秋冬湘潭平安电气集团有限公司湖南湘潭411100

对BD型矿用对旋轴流式主通风机机壳主要部件———机座———建立了有限元分析模型,计算分析表明,该型通风机机壳强度和刚度富余度过大.通过有限元分析,优化了机座结构,在保证性能的前提下,减小了钢板的厚度,机座质量减轻了25.4%.同时,... 详细信息

对BD型矿用对旋轴流式主通风机机壳主要部件———机座———建立了有限元分析模型,计算分析表明,该型通风机机壳强度和刚度富余度过大.通过有限元分析,优化了机座结构,在保证性能的前提下,减小了钢板的厚度,机座质量减轻了25.4%.同时,指出了该方法在同类产品中应用的可能性.

关键词：对旋轴流式主通风机机壳强度有限元

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Solid-state Circuit Breaker Based on Cascaded Normally-on SiC JFETs for Medium-voltage DC Distribution Networks

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Protection and Control of Modern Power Systems 2024年第2期9卷 32-46页

作者： dong he Haohui Zhou Zheng Lan Wei Wang Jinhui Zeng Xueping Yu Z.John Shen Chongqing University of Posts and Telecommunications ChongqingChina henan Polytechnic University JiaozuoChina College of Electrical and Information Engineering Hunan University of TechnologyZhuzhou 412007China Hunan University ChangshaChina College of Electrical and Information Engineering Hunan UniversityChangshaChina College of Electrical Engineering Three Gorges University Rensselaer Polytechnic Institute TroyNYUSA

Solid-state circuit breakers(SSCBs)are critical components in the protection of medium-voltage DC distribution networks to facilitate arc-free,fast and reliable isolation of DC ***,limited by the capacity of a single semiconductor device,using semi-conductor-based SSCBs at high voltage is *** study presents the details of a 1.5 kV,63 A medi-um-voltage SSCB,composed primarily of a solid-state switch based on three cascaded normally-on silicon car-bide(SiC)junction field-effect transistors(JFETs)and a low-cost programmable gate drive *** and static voltage sharing among the cascaded SiC JFETs of the SSCB during fault isolation is realized using the pro-posed gate drive *** selection conditions for the key parameters of the SSCB gate driver are also ***,an improved pulse-width modulation cur-rent-limiting protection solution is proposed to identify the permanent overcurrent and transient inrush current associated with capacitive load startup in a DC distribu-tion *** the developed SSCB prototype and the fault test system,experimental results are obtained to validate the fault response performance of the *** Terms—Solid-state circuit breaker,DC distribu-tion network,SiC JFET,voltage balancing,inrush current.

关键词： Solid-state circuit breaker DC distribu-tion network SiC JFET voltage balancing inrush current

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