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Efficient production optimization for naturally fractured reservoir using EDFM

Petroleum Science 2023年第4期20卷 2268-2281页

作者： Jian-Chun Xu wen-xin zhou Hang-Yu Li Key Laboratory of Unconventional Oil&Gas Development China University of Petroleum(East China)Ministry of EducationQingdao266580ShandongPR China School of Petroleum Engineering China University of Petroleum(East China)Qingdao266580ShandongPR China

Naturally fractured reservoirs make important contributions to global oil and gas reserves and *** modeling and simulation of naturally fractured reservoirs are different from conventional reservoirs as the existence of natural *** address the development optimization problem of naturally fractured reservoirs,we propose an optimization workflow by coupling the optimization methods with the embedded discrete fracture model(EDFM).Firstly,the effective and superior performance of the workflow is verified based on the conceptual *** stochastic simplex approximate gradient(StoSAG)algorithm,the ensemble optimization(EnOpt)algorithm,and the particle swarm optimization(PSO)algorithm are implemented for the production optimization of naturally fractured reservoirs based on the improved versions of the Egg model and the PUNQ-S3 *** results of the two cases demonstrate the effectiveness of this optimization workflow by finding the optimal well controls which yield the maximum net present value(NPV).Compared to the initial well control guess,the final NPV obtained from the production optimization of fractured reservoirs based on all three optimization algorithms is significantly *** with the optimization results of the PSO algorithm,StoSAG and EnOpt have significant advantages in terms of final NPV and computational *** results also show that fractures have a significant impact on reservoir *** economic efficiency of fractured reservoir development can be significantly improved by the optimization workflow.

关键词： Production optimization Naturally fractured reservoir Embedded discrete fracture method StoSAG algorithm PSO algorithm

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Optimal Stopping Time of a Portfolio Selection Problem with Multi-assets

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Journal of the Operations Research Society of China 2021年第1期9卷 163-179页

作者： Xian-Ping Wu Seakweng Vong wen-xin zhou School of Applied Mathematics Guangdong University of TechnologyGuangzhou 510006China Department of Mathematics University of MacaoMacaoChina Department of Applied Mathematics The Hong Kong Polytechnic UniversityHong KongChina

In this work,we study a right time for an investor to stop the investment among multi-assets over a given investment horizon so as to obtainmaximum *** formulate it to a two-stage *** main problem is not a standard optimal stopping problem due to the non-adapted term in the objective function,and we turn it to a standard one by stochastic *** subproblem with control variable in the drift and volatility terms is solved first via stochastic control method.A numerical example is presented to illustrate the efficiency of the theoretical results.

关键词： Optimal stopping Portfolio Valuefunction Dynamic programming Holding region

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The dual roles of cytokines in Alzheimer’s disease:update on interleukins, TNF-α,TGF-β and IFN-γ

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Translational Neurodegeneration 2016年第1期5卷 52-66页

作者： Cong Zheng xin-wen zhou Jian-Zhi Wang Department of Pathophysiology School of Basic Medicine and the Collaborative Innovation Center for Brain ScienceKey Laboratory of Ministry of Education of China for Neurological DisordersTongji Medical CollegeHuazhong University of Science and TechnologyWuhan 430030China Co-innovation Center of Neuroregeneration Nantong 226000China

Alzheimer’s disease(AD)is one of the most common neurodegenerative disorders in the *** the mechanisms underlying AD neurodegeneration are not fully understood,it is well recognized that inflammation plays a crucial role in the initiation and/or deterioration of AD *** evidence suggests that different cytokines,including interleukins,TNF-α,TGF-βand IFN-γ,are actively participated in AD pathogenesis and may serve as diagnostic or therapeutic targets for AD ***,we review the progress in understanding the important role that these cytokines or neuroinflammation has played in AD etiology and pathogenesis.

关键词： Alzheimer’s disease Cytokines Interleukins TNF-α TGF-β IFN-γ

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Enhanced ethanol oxidation over Pd nanoparticles supported porous graphene-doped MXene using polystyrene particles as sacrificial templates

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Rare Metals 2022年第9期41卷 3170-3179页

作者： Yi-Zhe Chen Ming zhou Yu-Fu Huang Yan-Yun Ma Luo-Yi Yan xin-wen zhou xin-zhou Ma Xue-Ling Zhao Cheng Chen Juan Bai Dong-Hai Lin Shanghai Engineering Research Center of Advanced Thermal Functional Materials Shanghai Key Laboratory of Engineering Materials Application and EvaluationSchool of Energy and MaterialsShanghai Polytechnic UniversityShanghai201209China Institute of Functional Nano&Soft Materials(FUNSOM) Jiangsu Key Laboratory for Carbon-Based Functional Materials&DevicesSoochow UniversitySuzhou215123China College of Biological and Pharmaceutical Sciences China Three Gorges UniversityYichang443002China School of Materials Science and Hydrogen Energy Foshan UniversityFoshan528000China School of Chemistry and Physics Queensland University of TechnologyBrisbaneQLD4000Australia

Fabrication of superior catalytic performance palladium-based catalysts with affordable cost is the key to develop direct ethanol fuel ***,Pd-decorated three-dimensional(3D)porous constructed from graphene oxide(GO)and MXene combining with polystyrene(PS)particles as sacrificial templates(Pd/GO-MXene-PS)to elevate the catalytic performance for ethanol oxidation was *** 3D porous interconnected structure of Pd/GO-MXene-PS was characterized by scanning electron microscope(SEM),transmission electron microscope(TEM)and Brunner−Emmet−Teller(BET).By optimizing the doping ratio of MXene to GO,the mass activity of Pd/GO_(5)-MXene_(5)-PS(2944.0 mA·mg^(−1))was 3.0 times higher than that of commercial Pd/C(950.4 mA·mg^(−1))toward ethanol oxidation in base ***,the rotating disk electrode(RDE)results demonstrated that Pd/GO5-MXene5-PS had a faster kinetics of ethanol *** enhanced ethanol oxidation over Pd/GO5-MXene5-PS could attribute to the excellent 3D interconnected porous structure,large surface area,good conductivity and homogeneous Pd *** work provided a new idea for creating 3D porous MXene composite materials in electrocatalysis.

关键词： Pd nanoparticles Ethanol oxidation Graphene MXene Polystyrene(PS)template Rotating disk electrode(RDE)

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Bifunctional sulfonated covalent polymers as the modulator for oriented and highly reversible zinc plating

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Science China Chemistry 2023年第1期66卷 289-296页

作者： Meng-Jie Chen Qing-Yuan Zhao Hong-Rui Wang Tao Long xin Ma Qing Wu wen-xin zhou Xiong-Wei Wu Xian-Xiang Zeng School of Chemistry and Materials Science Hunan Agricultural UniversityChangsha 410128China College of Chemistry and Chemical Engineering Hunan Provincial Key Laboratory of Efficient and Clean Utilization of ManganeseResourcesCentral South UniversityChangsha 410083China Information and Network Center Central South UniversityChangsha 410083China

The vast superiority in resource sustainability and volumetric energy density enables metallic zinc(Zn)to construct costeffective and environment-benign battery systems for the energy ***,the problems of Zn dendrites and poor Coulombic efficiency(CE)during cell’s whole life cycle stump its advancement as a rechargeable battery *** solution is to modulate the Zn^(2+) desolvation prior to electro-reduction and subsequent ***,a transferred protection tactic via a bifunctional sulfonated covalent polymer interlayer is proposed to regulate the Zn2+desolvation,which affects the formation of solid-electrolyte interphase,and guides its plating along with preferable(002)crystal ***,the high initial CE of 96.3%and the long-term average CE of 99.8%for 310 cycles are achieved in Zn||Cu cells and 570-h circulation is also realized at 2 mA cm^(-2)/10 mAh cm^(-2)in Zn||Zn ***,Zn||hydrated vanadium oxide-based full batteries with the low-concentration organic electrolytes are also demonstrated with the high specific capacity of 173.8 mAh g^(-1)at 0.5 A g^(-1)and 64%capacity retention over 305 cycles and oriented Zn deposition.

关键词： Zn anode interface chemistry sulfonated covalent polymer oriented plating reversibility

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High electro-catalytic graphite felt/Mn O2composite electrodes for vanadium redox flow batteries

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Science China Chemistry 2018年第6期61卷 732-738页

作者： Qiang Ma Qi Deng Hang Sheng Wei Ling Hong-Rui Wang Hai-wen Jiao Xiong-Wei Wu wen-xin zhou Xian-Xiang Zeng Ya-Xia Yin Yu-Guo Guo College of Science Hunan Agricultural University Changsha 410128 China Laboratory of Molecular Nanostructure and Nanotechnology and Beijing National Laboratory for Molecular Sciences Institute of Chemistry Chinese Academy of Sciences (CAS) Beijing 100190 China Hunan Province Yin Feng New Energy Co. LTD Changsha 410000 China

A mild and simple synthesis process for large-scale vanadium redox flow batteries(VRFBs)energy storage systems is desirable.A graphite felt/Mn O_2(GF-MNO)composite electrode with excellent electrocatalytic activity towards VO^(2+)/VO_2^+redox couples in a VRFB was synthesized by a one-step hydrothermal *** resulting GF-MNO electrodes possess improved electrochemical kinetic reversibility of the vanadium redox reactions compared to pristine GF electrodes,and the corresponding energy efficiency and discharge capacity at 150 m A cm^(-2)are increased by 12.5%and 40%,*** discharge capacity is maintained at 4.8 A h L^(-1)at the ultrahigh current density of 250 m A cm^(-2).Above all,80%of the energy efficiency of the GF-MNO composite electrodes is retained after 120 charge-discharge cycles at 150 m A cm^(-2).Furthermore,these electrodes demonstrated that more evenly distributed catalytic active sites were obtained from the Mn O_2particles under acidic *** proposed synthetic route is facile,and the raw materials are low cost and environmentally ***,these novel GF-MNO electrodes hold great promise in large-scale vanadium redox flow battery energy storage systems.

关键词： VRFB one-step hydrothermal graphite felt manganese dioxide composite electrode

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Data-Driven Fault-Tolerant Bipartite Consensus Tracking for Multi-Agent Systems With a Non-Autonomous Leader

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IEEE/CAA Journal of Automatica Sinica 2025年第1期12卷 279-281页

作者： Yan zhou Guanghui wen Jialing zhou Tao Yang the Department of Systems Science Southeast University the State Key Laboratory of CNS/ATM Beijing Institute of Technology the Beijing Institute of Technology (Zhuhai) the State Key Laboratory of Synthetical Automation for Process Industries Northeastern University

Dear Editor,This letter studies the bipartite consensus tracking problem for heterogeneous multi-agent systems with actuator faults and a leader's unknown time-varying control input. To handle such a problem, the continuous fault-tolerant control protocol via observer design is developed. In addition, it is strictly proved that the multi-agent system driven by the designed controllers can still achieve bipartite consensus tracking after faults occur.

关键词： Time varying control systems

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Melatonin ameliorated okadaic-acid induced Alzheimer-like lesions

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Acta Pharmacologica Sinica 2004年第3期25卷 22-26页

作者： Yi-peng WANG,Xian-tao LI,Shi-jie LIU,xin-wen zhou,Xiao-chuan WANG,Jian-zhi WANG2 TongjiMedical College,Huazhong University of Science and Technology,Wuhan 430030,China Tongji Medical College Huazhong University of Science and Technology Wuhan 430030 China

AIM: To explore the protective effects of melatonin (Mel) on the abnormal phosphorylation of neuronal cytoskeletal proteins. METHODS: We generated a neuroblastoma (SH-SY5Y) cell system in which cytoskeletal proteins are abnormally phosphorylated resulting in microtubule disruption due to the marked inhibition of protein phosphatase activities by okadaic acid (OA). RESULTS: OA-induced declines in cell viability and mitochondrial metabolic activity were remarkably prevented by Mel. In addition, the hyperphosphorylation/accumulation of neurofilament- (NF-) H/M subunits and the disruption of microtubules, induced by OA, were significantly inhibited by Mel. CONCLUSION: Our results suggest multiple protective functions of Mel against a series of pathological lesions known to culminate in AD, including abnormal phosphorylation of cytoskeletal proteins, microtubule disassembly and mitochondrion-initiated cell toxicity.

关键词： Alzheimer disease protein phosphatase okadaic acid neurofilament proteins melatonin

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Flow behavior and dynamic softening mechanism of Pt−10Ir precious alloy

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Transactions of Nonferrous Metals Society of China 2025年第1期35卷 225-242页

作者： xin-pei ZHANG Jun-jie HE Lin PI Quan FU wen-yan zhou Jun CHENG Sheng-wen BAI Xuan zhou Yi LIU Yong MAO Materials Genome Institute School of Materials and EnergyYunnan UniversityKunming 650091China Kunming Precious Materials&Technology Co. Ltd.Yunnan Precious Metals Laboratory Co.Ltd.Sino-Platinum Metals Co.Ltd.Kunming 650106China Kunming Institute of Precious Metals Kunming 650106China State Key Laboratory of Advanced Technologies for Comprehensive Utilization of Platinum Metals Sino-Platinum Metals Co.Ltd.Kunming 650106China Shaanxi Key Laboratory of Biomedical Metal Materials Northwest Institute for Non-ferrous Metal ResearchXi’an 710016China College of Materials Science and Engineering Chongqing UniversityChongqing 400044China

The hot deformation behavior of Pt−10Ir alloy was studied under a wide range of deformation *** a low deformation temperature(950−1150℃),the softening mechanism is primarily dynamic *** addition,dynamic recrystallization by progressive lattice rotation near grain boundaries(DRX by LRGBs)and microshear bands assisted dynamic recrystallization(MSBs assisted DRX)coordinate the ***,it is difficult for the dynamic softening to offset the stain hardening due to a limited amount of DRXed *** a high deformation temperature(1250−1350℃),three main DRX mechanisms associated with strain rates occur:DRX by LRGBs,DRX by a homogeneous increase in misorientation(HIM)and geometric DRX(GDRX).With increasing strain,DRX by LRGBs is enhanced gradually under high strain rates;the“pinch-off”effect is enhanced at low strain rates,which was conducive to the formation of a uniform and fine microstructure.

关键词： platinum alloy hot deformation microstructure evolution dynamic recovery dynamic recrystallization

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Quantum metrology with optimal control under an arbitrary non-Markovian bosonic environment

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Communications in Theoretical Physics 2025年第2期77卷 112-120页

作者： Likun zhou wen Yang Beijing Computational Science Research Center

Finding the optimal control is of importance to quantum metrology under a noisy *** this paper, we tackle the problem of finding the optimal control to enhance the performance of quantum metrology under an arbitrary non-Markovian bosonic environment. By introducing an equivalent pseudomode model, the non-Markovian dynamic evolution is reduced to a Lindblad master equation, which helps us to calculate the gradient of quantum Fisher information and perform the gradient ascent algorithm to find the optimal control. Our approach is accurate and circumvents the need for the Born–Markovian approximation. As an example, we consider the frequency estimation of a spin with pure dephasing under two types of non-Markovian environments. By maximizing the quantum Fisher information at a fixed evolution time, we obtain the optimal multi-axis control, which results in a notable enhancement in quantum metrology. The advantage of our method lies in its applicability to the arbitrary non-Markovian bosonic environment.

关键词： quantum metrology non-Markovian environment optimal control

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