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

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

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Highly Hydrolysis-Resistant Polyimide Fibers Prepared by Thermal Crosslinking with Inherent Carboxyl Groups

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Chinese Journal of Polymer Science 2024年第2期42卷 247-255,I0010页

作者： Can-Can zhang Jun-Long Yang Ya-Jiang huang Guang-Xian Li College of Polymer Science and Engineering State Key Laboratory of Polymer Materials Engineering of ChinaSichuan UniversityChengdu610065China

Easy hydrolysis in alkaline environments limits the use of polyimide fibers in environmental protection. The hydrolysis resistance levels of polyimide fibers can be improved by crosslinking of the macromolecular chains. In this work, crosslinked polyimide fibers(CPI fibers) were produced by intrinsic carboxyl decarboxylation for the first time. The thermal stability of the polyimide fibers containing the intrinsic carboxyl groups(PIC fibers) was studied, and the temperature of the decarboxylation-crosslinking reaction was determined to be 450 ℃. The PIC fibers were hotdrawn to initiate thermal crosslinking of the carboxyl groups and molecular chain orientation at high temperature. The CPI fibers had high tensile strengths(0.72-1.46 GPa) and compressive strengths(401-604 MPa). The oriented macromolecules and chemically crosslinked structure improved the tightness of the molecular chains and endowed the CPI fibers with excellent hydrolytic resistance. The CPI-50 fiber did not dissolve in a 0.5 wt% NaOH solution during heating at 90 ℃ for 10 h, and the tensile strength retention reached 87% when treated in 0.5 wt% NaOH solutions at 90 ℃ for 1 h, providing a guarantee for its application in alkaline corrosive environments.

关键词： Polyimide Carboxyl group Crosslinking Hydrolysis-resistance

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Leukopenia-a rare complication secondary to invasive liver abscess syndrome in a patient with diabetes mellitus:A case report

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World Journal of Gastrointestinal Surgery 2024年第10期16卷 3343-3349页

作者： Chun-Yan Niu Bang-Tao Yao hua-Yi Tao Xin-Gui Peng qing-hua zhang Yue Chen Lu Liu Department of Gastroenterology Nanjing Lishui People’s HospitalZhongda Hospital Lishui BranchSoutheast UniversityNanjing 211200Jiangsu ProvinceChina Department of Ophthalmology Nanjing Lishui People’s HospitalNanjing 211200Jiangsu ProvinceChina Department of Medical Imaging Nanjing Lishui People’s HospitalZhongda Hospital Lishui BranchSoutheast UniversityNanjing 210009Jiangsu ProvinceChina

BACKGROUND Thrombocytopenia is a common complication of invasive liver abscess syndrome(ILAS)by Klebsiella pneumoniae(***)infection,which indicates severe infection and a poor ***,the presence of leukopenia is *** are rare reports on leukopenia and its clinical significance for ILAS,and there is currently no recognized treatment *** and broad-spectrum antimi-crobial therapy may be an effective therapy for treating ILAS and improving its *** SUMMARY A 55-year-old male patient who developed fever,chills,and abdominal distension without an obvious cause presented to the hospital for *** tests revealed thrombocytopenia,leukopenia,and multiple organ *** examinations revealed an abscess in the right lobe of the liver and thromboph-lebitis,and *** was detected in the blood *** the patient was diabetic and had multi-system involvement,he was diagnosed with ILAS accom-panied by leukopenia and *** antibiotic treatment and sys-temic supportive therapy,the symptoms disappeared,and the patient’s condition almost completely *** Leukopenia is a rare complication of ILAS,which serves as an indicator of adverse prognostic outcomes and the severity of infection.

关键词： Invasive liver abscess syndrome Klebsiella pneumoniae Leukopenia Thrombocytopenia Treatment Prognosis Case report

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日本法医学专业人才培养模式及其借鉴

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法医学杂志 2024年第3期40卷 284-290页

作者：马陈骏谭勇张清华上海公安学院侦查系上海200137 司法鉴定科学研究院上海市法医学重点实验室司法部司法鉴定重点实验室上海市司法鉴定专业技术服务平台上海200063

日本法医鉴定人员素质在世界范围内得到普遍认可。日本近代法医学教育事业迅速崛起源于不断吸收外域法医学教育资源与教学经验,最终形成基础教育与专业培训层级分明、课堂教学与案例研讨相辅相成的法医学专业人才培养模式,并通过国内培... 详细信息

日本法医鉴定人员素质在世界范围内得到普遍认可。日本近代法医学教育事业迅速崛起源于不断吸收外域法医学教育资源与教学经验,最终形成基础教育与专业培训层级分明、课堂教学与案例研讨相辅相成的法医学专业人才培养模式,并通过国内培训与国际交流协作不断提升从业人员的综合素质,为日本法医行业发展输送专业人才。据此,本文以日本法医学专业发展史为切入点,研究其如何在近代逐渐形成法医学教育事业发展雏形,并在此基础上分析日本现代法医学专业人才培养模式的特点,提炼其中的优秀经验予以本地化改造,如强调实践教学环节作用、发挥职业技能培训效能以及促进国际交流合作等,以供我国相关专业人才培养所参考与借鉴。

关键词：法医学教育模式人才培养专业培训日本

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Rapid Time-Decay Phenomenon of the Incompressible Navier–Stokes Flow in Exterior Domains

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Acta Mathematica Sinica,English Series 2022年第4期38卷 745-760页

作者： qing hua zhang Yue Ping ZHU School of Sciences Nantong UniversityNantong 226019P.R.China Department of Mathematics Nantong Normal CollegeNantong 226010P.R.China

This paper focuses on the rapid time-decay phenomenon of the 3 D incompressible NavierStokes flow in exterior *** using the representation of the flow in exterior domains,together with the estimates of the Gaussian kernel,the tensor kernel,and the Stokes semigroup,we prove that under the assumption∫0∞∫ΩT[u,p](y,t).νdSydt=0 for the body pressure tensor T[u,p],if u0∈L1(Ω)∩Lσ3(Ω)∩W2/5,5/4(Ω)with‖u0‖3≤ηfor some sufficiently small numberη>0,then rapid time-decay phenomenon of the Navier-Stokes flow *** additionally|x|αu0∈Lr0(Ω)for some0<α<1 and 1

关键词： Incompressible Navier–Stokes equation exterior domain strong solution rapid time-decay phenomenon higher decay rates

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柔性显示盖板用耐弯折无色透明聚酰亚胺薄膜的制备与性能

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高分子学报 2024年第10期55卷 1393-1404页

作者：白帆江怡雯李琇廷董杰赵昕张清华纤维材料改性国家重点实验室东华大学材料科学与工程学院上海201620

随着显示领域的不断发展,柔性显示盖板用无色透明聚酰亚胺(CPI)薄膜的研发备受关注.本研究中,通过使用商业化酸酐和二胺单体,调控主链结构、氟含量和分子间氢键,进而实现了薄膜透明性、尺寸稳定性、耐热性和机械性能之间的平衡;制备的CP... 详细信息

随着显示领域的不断发展,柔性显示盖板用无色透明聚酰亚胺(CPI)薄膜的研发备受关注.本研究中,通过使用商业化酸酐和二胺单体,调控主链结构、氟含量和分子间氢键,进而实现了薄膜透明性、尺寸稳定性、耐热性和机械性能之间的平衡;制备的CPI-2-TF薄膜有优异的平均光学透过率(T_(av))(>88%),同时具有较低的线性膨胀系数(CTE)(<1.3×10^(-5) K^(-1))、较高的玻璃化转变温度(T_(g))(≥380℃)和优良的机械性能,为CPI的商业化进程和大规模制备提供基础.此外,本研究重点考察了CPI-2-TF的耐弯折稳定性,弯折20万次后的薄膜基本没有任何变化,其T_(av)保持率在99%以上,力学性能仅下降4%;进一步弯折40万次后,薄膜的光学性能基本不变,力学性能保持率在92%以上,在折叠屏手机等领域展示出较高的应用潜力.

关键词：无色透明聚酰亚胺耐弯折性能柔性显示盖板耐高温

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Impacts of water surface area of watershed on design flood

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Water Science and Engineering 2014年第1期7卷 41-48页

作者： qing-hua zhang Yan-fang DIAO Jie DONG College of Water Conservancy and Civil Engineering Shandong Agricultural University State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering Hohai University

In order to analyze the impact of the water surface area of a watershed on the design flood, the watershed was classified into a land watershed and a water surface watershed for flood flow calculation at the same time interval. Then, the design flood of the whole watershed was obtained by adding the two flood flows together. Using this method, we calculated design floods with different water surface areas of three reservoirs and analyzed the impact of water surface area on the flood volume and peak flow. The results indicate that larger water surface areas lead to greater impacts on the flood volume and peak flow. For the same watershed area, the impact of water surface area on the flood volume and peak flow is positively proportional to the flood frequency, i.e., the higher the frequency, the greater the impact becomes.

关键词： watershed water surface area design flood, flood frequency flood volume peak Jlow

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Experimental study on discharge coefficient of a gear-shaped weir

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Water Science and Engineering 2018年第3期11卷 258-264页

作者： Jing zhang Qian Chang qing-hua zhang Shu-ning Li College of Water Conservancy and Civil Engineering Shandong Agricultural University River Management Bureau Huaihe River Commission of the Ministry of Water Resources

This study focused on hydraulic characteristics around a gear-shaped weir in a straight channel. Systematic experiments were carried out for weirs with two different gear heights and eight groups of geometrical parameters. The impacts of various geometrical parameters of gear-shaped weirs on the discharge capacity were investigated. The following conclusions are drawn from the experimental study:(1) The discharge coefficient(m_c) was influenced by the size of the gear: at a constant discharge, the weir with larger values of a/b(a is the width of the gear, and b is the width between the two neighboring gears) and a/c(c is the height of the gear) had a smaller value of m_c. The discharge capacity of the gear-shaped weir was influenced by the water depth in the weir.(2) For type C1 with a gear height of 0.01 m, when the discharge was less than 60m^3/h and H_1=P 1.0, m_c slowly decreased with the increases of the discharge and H_1=P for a=b 1.0 and a=c 1.0, and slowly increased with the discharge and H_1=P for a=b > 1.0 and a=c > 1.0.(3) A formula of m_cfor gear-shaped weirs was established based on the principle of weir flow, with consideration of the water depth in the weir, the weir height and width, and the height of the gear.

关键词： Experimental study Discharge coefficient Discharge capacity Gear-shaped weir Geometrical parameter

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Highly Transparent and Colorless Polyimide Film with Low Dielectric Constant by Introducing Meta-substituted Structure and Trifluoromethyl Groups

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Chinese Journal of Polymer Science 2021年第4期39卷 455-464,I0006页

作者： Hong-Tao Zuo Feng Gan Jie Dong Peng zhang Xin Zhao qing-hua zhang State Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of Materials Science and EngineeringDonghua UniversityShanghai 201620China Institute of High Energy Physics Chinese Academy of SciencesBeijing 100049China

An effective design strategy for preparing highly transparent polyimide film with low dielectric constant is *** key to the strategy is to simultaneously introduce meta-substituted structure and trifluoromethyl in polymer *** using this design strategy,a highly transparent polyimide film with low-k was synthesized from 3,5-diaminobenzotrifluoride(m-TFPDA)and 4,4'-(hexafluoroisopropylidene)diphthalic anhydride(6FDA)through a two-step *** obtained m-TFPDA/6FDA(CPI)film(~30 pm)possesses high optical transparency(λ_(cutoff)=334 nm,T_(450nm)=85.26%,Haze=0.31)and is close to colorless(L^(*)=96.03,a^(*)=-0.34,b^(*)=2.12,yellow index=3.96).The intrinsic k and dielectric loss value of the film are 2.27 and 0.0013 at 10 kHz,*** importantly,such low dielectric performance could remain stable up to 280℃,and the film shows a low moisture rate(~0.51%),which helps to maintain the low-k property stability in different humid ***,the film also shows good thermal stability and mechanical properties,with a glass transition temperature(T_(g))of 296℃and the 5 wt%decomposition temperature(T_(d,s%))of 522℃under N_(2).The tensile strength and tensile modulus of the film are 85.1 MPa and 1.96 GPa,*** addition,the film is soluble in common solvents,which allows simple solution processing and low-cost,continuous roll-to-roll *** design strategy is beneficial to improving the transparency,lightening yellow color,lowering the dielectric constant and meanwhile maintaining the comprehensive properties of polyimide films,which is mainly due to the introduced meta-substituted and trifluoromethyl structures effectively inhibiting the transfer of charge transfer complex(CTC)effects and increasing the free volume of *** design strategy could also be extended to other high-performance polymer systems.

关键词： Polyimide film Transparent Colorless Low dielectric constant

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Rice Homeobox Transcription Factor HOX1a Positively Regulates Gibberellin Responses by Directly Suppressing EL1

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Journal of Integrative Plant Biology 2011年第11期53卷 869-878页

作者： Bi-qing Wen Mei-qing Xing hua zhang Cheng Dai Hong-Wei Xue National Key Laboratory of Plant-Molecular Genetics Institute of Plant Physiology and Ecology Shanghai Institute for Biological Sciences the Chinese Academy of Sciences Shanghai 200032 China

Homeobox transcription factors are involved in various aspects of plant development, including maintenance of the biosynthesis and signaling pathways of different hormones. However, few direct targets of homeobox proteins have been identified. We here show that overexpression of rice homeobox gene HOXla resulted in enhanced gibberellin （GA） response, indicating a positive effect of HOXla in GA signaling. HOXla is induced by GA and encodes a homeobox transcription factor with transcription repression activity. In addition, HOXla suppresses the transcription of early flowering1 （EL1）, a negative regulator of GA signaling, and further electrophoretic mobility shift assay and chromatin immunoprecipitation analysis revealed that HOXla directly bound to the promoter region of EL1 to suppress its expression and stimulate GA signaling. These results demonstrate that HOXla functions as a positive regulator of GA signaling by suppressing EL1, providing informative hints on the study of GA signaling.

关键词： EL1 giberellin giberellin signaling HOXla homeobox.

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