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Multi-surrogate framework with an adaptive selection mechanism for production optimization

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Petroleum Science 2024年第1期21卷 366-383页

作者： Jia-Lin Wang Li-Ming Zhang Kai Zhang Jian Wang Jian-ping Zhou Wen-Feng Peng Fa-Liang Yin Chao Zhong Xia Yan pi-yang liu Hua-Qing Zhang Yong-Fei yang Hai Sun School of Petroleum Engineering China University of Petroleum(East China)Qingdao266580ShandongChina Qingdao University of Technology Qingdao266580ShandongChina College of Science China University of PetroleumQingdao266580ShandongChina Zepu Oil and Gas Development Department PetroChina Tarim Oilfield CompanyKorla841000XinjiangChina Hainan Branch of CNOOC Ltd Haikou70311HainanChina

Data-driven surrogate models that assist with efficient evolutionary algorithms to find the optimal development scheme have been widely used to solve reservoir production optimization ***,existing research suggests that the effectiveness of a surrogate model can vary depending on the complexity of the design problem.A surrogate model that has demonstrated success in one scenario may not perform as well in *** the absence of prior knowledge,finding a promising surrogate model that performs well for an unknown reservoir is ***,the optimization process often relies on a single evolutionary algorithm,which can yield varying results across different *** address these limitations,this paper introduces a novel approach called the multi-surrogate framework with an adaptive selection mechanism(MSFASM)to tackle production optimization *** consists of two *** the first stage,a reduced-dimensional broad learning system(BLS)is used to adaptively select the evolutionary algorithm with the best performance during the current optimization *** the second stage,the multi-objective algorithm,non-dominated sorting genetic algorithm II(NSGA-II),is used as an optimizer to find a set of Pareto solutions with good performance on multiple surrogate models.A novel optimal point criterion is utilized in this stage to select the Pareto solutions,thereby obtaining the desired development schemes without increasing the computational load of the numerical *** two stages are combined using sequential transfer *** the two most important perspectives of an evolutionary algorithm and a surrogate model,the proposed method improves adaptability to optimization problems of various reservoir *** verify the effectiveness of the proposed method,four 100-dimensional benchmark functions and two reservoir models are tested,and the results are compared with those obtained by six other surrogate-model-based *** res

关键词： Production optimization Multi-surrogate models Multi-evolutionary algorithms Dimension reduction Broad learning system

Effect of hydraulic fracture deformation hysteresis on CO_(2)huff-n-puff performance in shale gas reservoirs

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2023年第1期24卷 37-55页

作者： Xia YAN pi-yang liu Zhao-qin HUANG Hai SUN Kai ZHANG Jun-feng WANG Jun YAO School of Petroleum Engineering China University of Petroleum(East China)Qingdao 266580China Civil Engineering School Qingdao University of TechnologyQingdao 266520China Chuandong Drilling Company CNPC Chuanqing Drilling Engineering Company LimitedChongqing 401120China

As a promising enhanced gas recovery technique,CO_(2)huff-n-puff has attracted great attention ***,hydraulic fracture deformation hysteresis is rarely considered,and its effect on CO_(2)huff-n-puff performance is not well *** this study,we present a fully coupled multi-component flow and geomechanics model for simulating CO_(2)huff-n-puff in shale gas reservoirs considering hydraulic fracture deformation ***,a shale gas reservoir after hydraulic fracturing is modeled using an efficient hybrid model incorporating an embedded discrete fracture model(EDFM),multiple porosity model,and single porosity *** flow equations,Fick’s law,extended Langmuir isotherms,and the Peng-Robinson equation of state are used to describe the molecular diffusion,multi-component adsorption,and gas properties,*** relation to geomechanics,a path-dependent constitutive law is applied for the hydraulic fracture deformation *** finite volume method(FVM)and the stabilized extended finite element method(XFEM)are applied to discretize the flow and geomechanics equations,*** then solve the coupled model using the fixed-stress split iterative ***,we verify the presented method using several numerical examples,and apply it to investigate the effect of hydraulic fracture deformation hysteresis on CO_(2)huff-n-puff performance in a 3D shale gas *** results show that hydraulic fracture deformation hysteresis has some negative effects on CO_(2)huff-n-puff *** effects are sensitive to the initial conductivity of hydraulic fracture,production pressure,starting time of huff-n-puff,injection pressure,and huff-n-puff cycle number.

关键词： Enhanced gas recovery CO_(2)huff-n-puff Coupled geomechanics and multi-component flow Hydraulic fracture deformation hysteresis Embedded discrete fracture model(EDFM)

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基于模糊自适应piD控制器的智能供水系统

电气自动化 2012年第3期34卷 79-81页

作者：皮柳杨陈希有李红大连理工大学电气工程学院辽宁大连116023

系统采用PLC(Programmable Logic Controller)作为触点和变频器的控制单元。用LabVIEW作为上位机,为系统提供友好的人机交互界面。以模糊自适应piD算法和模糊控制理论为基础,设计了一套优化的智能供水系统。该系统能够减少能量浪费,提... 详细信息

系统采用PLC(Programmable Logic Controller)作为触点和变频器的控制单元。用LabVIEW作为上位机,为系统提供友好的人机交互界面。以模糊自适应piD算法和模糊控制理论为基础,设计了一套优化的智能供水系统。该系统能够减少能量浪费,提高水压稳定性。实验结果表明,该系统运行状况良好,性能优越,验证了其有效性和可靠性。

关键词：模糊控制恒压供水变频器人机界面

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通用型多通道高速数据采集记录仪

太赫兹科学与电子信息学报 2014年第4期12卷 600-604页

作者：皮柳杨黄莎玲叶海福中国工程物理研究院电子工程研究所四川绵阳621999

目前数据采集记录仪体积较大,采样频率低,记录通道少,记忆空间易受干扰而多变。本系统以Xilinx的Virtex-5系列现场可编程门阵列(FPGA)芯片XC5VLX30作为核心控制单元;采用ADI公司的高速AD进行模数转换;外围采用多片并口存储器作为存储单... 详细信息

目前数据采集记录仪体积较大,采样频率低,记录通道少,记忆空间易受干扰而多变。本系统以Xilinx的Virtex-5系列现场可编程门阵列(FPGA)芯片XC5VLX30作为核心控制单元;采用ADI公司的高速AD进行模数转换;外围采用多片并口存储器作为存储单元,延长记录时间。本系统能够采样16通道以上、精确度8位模拟信号,采样速率能达500 Mbps以上,并把采样数据无线传输给上位机进行处理。

关键词：高速采集多通道状态机 FPGA芯片

Cortical plasticity and nerve regeneration after peripheral nerve injury

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Neural Regeneration Research 2021年第8期16卷 1518-1523页

作者： Ci Li Song-yang liu Wei pi Pei-Xun Zhang Department of Orthopedics and Trauma Peking University People’s HospitalBeijingChina Key Laboratory of Trauma and Neural Regeneration Peking UniversityBeijingChina National Center for Trauma Medicine BeijingChina

With the development of neuroscience, substantial advances have been achieved in peripheral nerve regeneration over the past decades. However, peripheral nerve injury remains a critical public health problem because of the subsequent impairment or absence of sensorimotor function. Uncomfortable complications of peripheral nerve injury, such as chronic pain, can also cause problems for families and society. A number of studies have demonstrated that the proper functioning of the nervous system depends not only on a complete connection from the central nervous system to the surrounding targets at an anatomical level, but also on the continuous bilateral communication between the two. After peripheral nerve injury, the interruption of afferent and efferent signals can cause complex pathophysiological changes, including neurochemical alterations, modifications in the adaptability of excitatory and inhibitory neurons, and the reorganization of somatosensory and motor regions. This review discusses the close relationship between the cerebral cortex and peripheral nerves. We also focus on common therapies for peripheral nerve injury and summarize their potential mechanisms in relation to cortical plasticity. It has been suggested that cortical plasticity may be important for improving functional recovery after peripheral nerve damage. Further understanding of the potential common mechanisms between cortical reorganization and nerve injury will help to elucidate the pathophysiological processes of nerve injury, and may allow for the reduction of adverse consequences during peripheral nerve injury recovery. We also review the role that regulating reorganization mechanisms plays in functional recovery, and conclude with a suggestion to target cortical plasticity along with therapeutic interventions to promote peripheral nerve injury recovery.

关键词： cortical plasticity injury mechanisms nerve transfer neurorrhaphy peripheral nerve phantom limb pain recovery regeneration treatment

Formation, Structures and Electronic Properties of Silicene Oxides on Ag(111)

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Journal of Materials Science & Technology 2017年第7期33卷 751-757页

作者： Muhammad Ali Zhenyi Ni Stefaan Cottenier Yong liu Xiaodong pi Deren yang Centerfor Molecular Modeling （CMM） and Department of Materials Science and Engineering （DMSE） Ghent University Zwijnaarde BE-9052. Belgium

The formation, structural and electronic properties of silicene oxides（SOs） that result from the oxidation of silicene on Ag（111） surface have been investigated in the framework of density functional theory（DFT）.It is found that the honeycomb lattice of silicene on the Ag（111） surface changes after the oxidation. SOs are strongly hybridized with the Ag（111） surface so that they possess metallic band structures. Charge accumulation between SOs and the Ag（111） surface indicates strong chemical bonding, which dramatically affects the electronic properties of SOs. When SOs are peeled off the Ag（111） surface, however, they may become semiconductors.

关键词： Silicene oxides Ag(111) Density functional theory Oxidation Hybridization Band gap

Formation,Stability,Geometry and Band Structure of Organically Surface-Modified Germanane

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Journal of Materials Science & Technology 2017年第1期33卷 59-64页

作者： Hui Jia Rong Wang Zhenyi Ni Yong liu Xiaodong pi Deren yang State Key Laboratory of Silicon Materials and Department of Materials Science and Engineering Zhejiang University Key Laboratory of Interface Science and Engineering in Advanced Materials Ministry of EducationTaiyuan University of Technology

Surface modification may be an effective means for controlling the properties of germanane, i.e., hydrogenated germanene. In this work, we investigate the formation, stability, structure and electronic properties of surface-modified germanane that results from the hydrogermylation, alkoxylation, aminization or phenylation of germanane. By assuming the typical organic surface coverage of -33%, we have com- pared organically surface-modified germanane with germanene and germanane in the framework of density functional theory. It is found that organically surface-modified germanane may all stably exist despite the endothermic nature of organic surface modification. Organic surface modification leads to the de- crease of the Ge--Ge bond length and the Ge--Ge-Ge bond angle ofgermanane, while causing the buckling distance of germanane to increase. Hydrogenation makes germanene change from a semimetal to a direct- bandgap semiconductor. Organic surface modification further impacts the band structure of the resulting germanane. Hydrogermylated/alkoxylated germanane is a direct-bandgap semiconductor, while aminated/ phenylated germanane is an indirect-bandgap semiconductor. All the organic surface modification gives rise to the increase of the bandgap of germanane.

关键词： Germanane Surface modification Density functional theory Band structure

Review of computer-generated hologram algorithms for color dynamic holographic three-dimensional display

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Light(Science & Applications) 2022年第9期11卷 1962-1978页

作者： Dapu pi Juan liu Yongtian Wang Beijing Engineering Research Center for Mixed Reality and Advanced Display School of Optics and PhotonicsBeijing Institute of TechnologyBeijing 100081China

Holographic three-dimensional display is an important display technique because it can provide all depth information of a real or virtual scene without any special *** recent years,with the development of computer and optoelectronic technology,computer-generated holograms have attracted extensive attention and developed as the most promising method to realize holographic ***,some bottlenecks still restrict the development of computer-generated holograms,such as heavy computation burden,low image quality,and the complicated system of color holographic *** overcome these problems,numerous algorithms have been investigated with the aim of color dynamic holographic three-dimensional *** this review,we will explain the essence of various computer-generated hologram algorithms and provide some insights for future research.

关键词： holographic dynamic overcome

Enhanced remediation of Cr(Ⅵ)-contaminated groundwater by coupling electrokinetics with ZVI/Fe_(3)O_(4)/AC-based permeable reactive barrier

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Journal of Environmental Sciences 2022年第2期34卷 280-290页

作者： Ruolin Cao Shiqing liu Xinyu yang Chunfeng Wang Yanbin Wang Wanfeng Wang Yunqing pi Henan Key Laboratory for Environmental Pollution Control and Key Laboratory for Yellow River and Huai River Water Environment and Pollution Control(Ministry of Education) School of EnvironmentHenan Normal UniversityXinxiang 453007China

Although widely used in permeation reaction barrier(PRB)for strengthening the removal of various heavy metals,zero-valent iron(ZVI)is limited by various inherent drawbacks,such as easy passivation and poor electron *** a solution,a synergistic system with PRB and electrokinetics(PRB-EK)was established and applied for the efficient removal of Cr(Ⅵ)-contaminated *** the filling material of PRB,ZVI/Fe_(3)O_(4)/activated carbon(ZVI/Fe_(3)O_(4)/AC)composites were synthesized by ball milling and thermal treatment.A series of continuous flow column experiments and batch tests was conducted to evaluate the removal efficiency of Cr(Ⅵ).Results showed that the removal efficiency of Cr(Ⅵ)remained above 93%even when the bed volume(BV)reached 2000 under the operational parameters(iron/AC mass ratio,2:1;current,5 m A).The mechanism of Cr(Ⅵ)removal by the PRB-EK system was revealed through field emission scanning electron microscopy images,X-ray diffraction,X-ray photoelectron spectroscopy,Fe^(2+) concentration,and redox potential(E h)*** key in Cr(Ⅵ)reduction was the Fe^(2+)/Fe^(3+) cycle driven by the surface microelectrolysis of the *** application of an externally supplied weak direct current maintained the redox process by enhancing the electron transfer capability of the system,thereby prolonging the column ***(Ⅵ)chemical speciation was determined through sequential extraction,verifying the stability and safety of the *** findings provide a scientific basis for PRB design and the in-situ remediation of Cr(Ⅵ)-contaminated groundwater.

关键词： ZVI/Fe_(3)O_(4)/AC Electrokinetics Micro-electrolysis Cr(Ⅵ)-continuous ground water Zero-valent iron