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IEEE International conference on computation, communication and engineering (ICCCE)

作者： Qing Tang Hua Wu Guoquan Teng Hongguang Bu Chaodong Tan Jiankang Liu Xiongying Zhang Yanlong Zhang Wei Yan Jingen deng PetroChina Dagang Oilfield Production Technology Research Institute Tianjin China China University of Petroleum Beijing China Beijing Yadan Petroleum Technology Co. Ltd Beijing China CNPC Engineering Technology R&D Company Limited Beijing China

ISBN: (数字)9781728131122

ISBN: (纸本)9781728131139

despite numerous studies in the subject matter, there is no mature casing damage prediction method based on historical casing damage data in the oil and water well production stage for unconsolidated sandstone reservoirs. We use two popular algorithms to establish a prediction model for the sand-sand casing damage area, eXtreme Gradient Boosted Trees (XGBoost) and Light Gradient Boosted Trees (LGBM). According to data analysis and casing damage mechanism, we selected 19 casing damage factors for oil wells and 18 for water injection wells. Geological, reservoir, completion and historical production/operation data for 653 production layers and 212 injection layers in Gangxi Oilfield are collected to form dataset. Among them, the casings of 91 production layers and 22 injection layers were damaged. The dataset is split into 80% training and 20% holdout datasets. A training dataset is split into 10-fold cross validation. Two machine learning algorithms are evaluated predicting casing damage and their performance is compared. For production wells, the prediction accuracy of LGBM model is higher, up to 95.4%. For injection wells, the prediction accuracy of LGBM model is higher, up to 100%. Therefore, we can use more accurate model to predict casing damage in unconsolidated sandstone reservoirs, and determine main controllable factors of casing damage in risk wells, so as to provide technical guidance for technicians to take preventive measures.

关键词： Production Predictive models Oils reservoirs Machine learning algorithms computational modeling

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corrigendum to “Phase behavior and rheology of the sucrose laurate/sorbitan mono-laurate (Span 20)/water pseudo-ternary system” [colloid. Surf. A 700 (2024) 134744]

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colloids and Surfaces A: Physicochemical and engineering Aspects 2024年 700卷

作者： Jing Zhou Meng Xiao Hongyan Xie R&D Department of the Daily Chemicals Institute of Life Science Perfect (Guangdong) Commodity Corporation LTD. NO.8 Perfect Road Nanlang Town Zhongshan China Laboratory of Applied Bio-catalysis School of Food Science and Engineering South China University of Technology NO.381 Wushan Road Tianhe District Guangzhou China Department of Pharmaceutical Analysis Guangzhou Novaken Pharmaceutical Co. Ltd No.1078 Xingye Avenue East Panyu District Guangzhou China

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Identifying gelatin source by mass spectrometry: A review

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Food Chemistry 2025年 488卷 144904页

作者： Sha, Xiao-Mei Yang, Le-Ying Wang, Hui Cheng, Jie Luo, Hao-Sheng Zhang, Li-Jun Hu, Zi-Zi Tu, Zong-Cai National R&D Center for Freshwater Fish Processing College of Life Science Jiangxi Normal University Jiangxi Nanchang330022 China State Key Laboratory of Food Science and Resources Nanchang University Jiangxi Nanchang330047 China Shandong Provincial Key Laboratory of Gelatine Medicines Research and Development Dong-E-E-Jiao Co. Ltd. Shandong Liaocheng252201 China National Engineering Technology Research Center for Gelatin-based Traditional Chinese Medicine Dong-E-E-Jiao Co. Ltd. Shandong Liaocheng252201 China Guangdong Audima Bio-tech Co. Ltd Guangdong Huazhou525100 China

Gelatin is adulterated in various foods, which can be identified by mass spectrometry (MS) to detect characteristic peptides. The paper aims to review the application of MS in qualitative and quantitative analysis of gelatin. The identification results are affected by many factors, including the process of gelatin production and processing, the pre-treatment method and type of MS. At present, the traceability of gelatin mainly exists in pure gelatin, mixed gelatin and food systems. The quantification of gelatin is mainly through external reference and labeled internal standards. In the future, reducing the loss of gelatin during extraction, obtaining the maximum target characteristic peptide and improving the accuracy of MS should be focused on. In addition, the quantitative application of MS should be expanded to meet the market demand. © 2025

关键词： Mass spectrometry

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Economic Analysis of Integrated Energy Supply System Based on Solid Oxide Fuel Cell

Economic Analysis of Integrated Energy Supply System Based o...

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Sustainable Power and Energy conference (iSPEC)

作者： Jiang Ting Hu Yongfeng Xu Jingjing National Energy Distributed Energy Technology R&D Center China Huadian Engineering Co. Ltd Beijing China

ISBN: (纸本)9781728149318

In recent years, natural gas distributed energy systems have been vigorously developed due to their high energy efficiency, environmental friendliness and closeness to users. In this paper, a solid oxide fuel cell is used as the main power generation equipment for natural gas distributed energy. A 200kW cooling, heating and power triple supply system is designed to power a commercial user in Beijing. The results show that the system power generation efficiency is 53.3%, and the annual energy utilization efficiency is 88.32%, which is higher than system driven by combustion engine and gas turbine. Through the study of the three modes of system cooling season, heating season and transition season, the addition of system cooling and heating storage tank effectively increases the hourly supply of heating and cooling. At the same time, reducing the price of natural gas supply and increasing the life of solid oxide batteries will help improve system economics.

关键词： distributed energy system solid oxide fuel cell energy storage electricity price economics Solid oxide fuel cells distributed energy system energy storage economics economic analysis Electricity pricing Energy Supply System fuel batteries cooling Natural gas supply energy utilization efficiency Supply systems Heating combustion engine

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Improved the biocompatibility of cancellous bone with compound physicochemical decellularization process

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regenerative Biomaterials 2020年第5期7卷 443-451页

作者： You Ling Weikang Xu Lifeng Yang Changyan Liang Bin Xu National Engineering Research Center for Human Tissue Restoration and Function Reconstruction School of Materials Science and EngineeringSouth China University of TechnologyGuangzhou Higher Education Mega CentrePanyu DistrictGuangzhouGuangdong 510006China Department of Scientific Research National Engineering Research Center for Healthcare DevicesGuangdong Key Lab of Medical Electronic Instruments and Polymer Material ProductsGuangdong Institute of Medical InstrumentsGuangdong Academy of SciencesNo.1307 Guangzhou Avenue CentralTianhe DistrictGuangzhouGuangdong 510500China National Engineering Laboratory for Regenerative Implantable Medical Devices R&D CenterGrandhope Biotech Co.LtdGuangzhouGuangdong 510530China Department of Biosecurity Evaluation Guangdong Medical Devices Quality Surveillance and Test InstituteNo.1 Guangpu West RoadHuangpu DistrictGuangzhouGuangdong 510663China Department of Gynecology Third Affiliated Hospital of Sun Yat-sen UniversityNo.600 Tianhe RoadTianhe DistrictGuangzhou 510630China

due to the unique microstructures and components of extracellular matrix(ECM),decellularized scaffolds had been used widely in *** reaction of the host toward decellularized scaffolds depends on their biocompatibility,which should be satisfied before applied in *** aim of this study is to develop a decellularized xenograft material with good biocompatibility for further bone repair,in an effective and gentle *** existing chemical and physical decellularization techniques including ethylene diamine tetraacetic acid(EdTA),sodium dodecyl sulfate(SdS)and supercritical carbon dioxide(SC-co2)were combined and modified to decellularize bovine cancellous bone(CB).After decellularization,almost 100%of A-Gal epitopes were removed,the combination of collagen,calcium and phosphate was *** direct and indirect contact with macrophages was used to evaluate the cytotoxicity and immunological response of the *** stem cells(MSCs)were used in the in vitro cells’proliferation *** decellularized CB was proved has no cytotoxicity(grade 1)and no immunological response(NO,IL-2,IL-6 and TNF-α secretion inhibited),and could support MSCs proliferated *** results were similar to that of commercial decellularized human *** study suggests the potential of using this kind of combine decellularization process to fabricate heterogeneous ECM scaffolds for clinical application.

关键词： extracellular matrix cancellous bone physicochemical decellularization biocompatibility

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True 3d Fracture Simulation with Geology-engineering Integration of Volume Modification in Jimsar Shale Oil

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IOP conference Series: Earth and Environmental Science 2021年第2期714卷

作者： Kui Zhang Yang Xiao Leiming Cheng Shouyu Liu Junchao Wang Mingqiang Xu Engineering Technology Research Institute Xinjiang Oilfield Company PetroChina Karamay China CNPC Engineering Technology R&D Company Limited Beijing China School of Energy Chengdu University of Technology Chengdu China Chengdu Institute of Technology Sunshine Energy Technology Co. Ltd. Chengdu China Shale oil Project Management Department Development Company PetroChina Xinjiang Oilfield Company Karamay China

The main characteristics of Jimsar shale oil reservoir are of complex structure, strong heterogeneity and great difficulty in fracturing. It is mainly produced by volume fracturing technology, which is easy to form complex fracture networks. At present, the design and parameter optimization of fracturing scheme are not targeted, and the true 3d fracture simulation with geology-engineering integration is particularly important. On the basis of 3d geological modeling, the 3d geo-mechanical parameter distribution is determined by seismic data, logging data, experimental data, etc to simulate the stress environment in which the overburden pressure, surrounding rock pressure and lower strata pressure. And the 3d geo-mechanical parameter model is established by combining simulated analysis of the stress. On the basis of geological model, geomechanical model and natural fracture model, the natural fractures and faults determined by seismic, logging or discrete fracture modeling are integrated into the geomechanical model to complete the true 3d simulation of artificial fracture network based on true 3d geo-mechanical model. This simulation is the practice and improvement of the geology-engineering integration of shale oil reservoirs volume modification technology in Jimsar, which will deepen the geological understanding and strengthens the engineering technology supporting, provides reference basis for the optimization design of fracturing process and the maximization of the volume, and finally realizes the efficient development of shale oil in Jimsar.

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Simulation Analysis of Characteristics for Independent Metering control System Based on downstream compensation

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World Journal of engineering and technology 2019年第3期7卷 536-547页

作者： Guotai Zhang Jie Xu Jing Yang Kailei Liu Medium Size Excavator R&D Institute Sany Heavy Machinery Co. Ltd. Kunshan China Big Size Excavator R&D Institute Sany Heavy Machinery Co. Ltd. Kunshan China School of Mechanical Engineering Yanshan University Qinhuangdao China School of Mechanical Engineering Jiangsu University of Technology Changzhou China

Aiming at the shortcomings of the separate meter in and separate meter out?hydraulic system, a new type of independent metering control system is proposed by referring to the principle of load-sensing system. The valve group unit in the system is designed, and the AMESim/Matlab cosimulation model of the component and system is established. The actuator speed control, energy consumption and anti-flow saturation characteristics of the system are discussed. The simulation result shows that the system proposed in this article can achieve?better performances.

关键词： Independent Metering control Pressure compensation cosimulation

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56-2:Invited Paper:World's First 1 Hz driving Fringe-Field Switching (FFS) LCd for Power Saving

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SId Symposium digest of Technical Papers 2023年第1期54卷

作者： Seung-Hwa Baek Jong-Wook Jung Hee-Jung Park dong-Jin Lee Sun-Mi Park Ki-Sun Kwon Heui-Seok Jin HanByeol Park daYeon Lee MinSu Kim Seung Hee Lee LG Display R&D Center Paju Gyeonggi Korea 413-779 Merck Performance Materials Co. Ltd. Pyeongtaek Gyeonggi Korea an affiliate of Merck KGaA Darmstadt Germany Department of Nano Convergence Engineering Jeonbuk National University Jeonju Jeonbuk Korea 54896 Department of Polymer Nano Science and Technology Jeonbuk National University Jeonju Jeonbuk Korea 54896

Here, we demonstrate world's first 1 Hz driving fringe-field switching (FFS) LCd via development of low flexoelectric coefficient LCs with high voltage holding ratio (VHr). The evaluation of the 1 Hz driving 13.4-inch FFS LCd laptop panel shows no flicker, and the power consumption is reduced by 83% compared to the 60 Hz driving. We believe this result opens a new chapter of FFS LCds for low-power consumption.

关键词： Fringe-field switching liquid crystal display (FFS LCd) Power saving Low refresh rate mode Flexoelectric effect Voltage holding ratio Flicker

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Steady and unsteady flow characteristics of a multi-stage centrifugal pump under design and off-design conditions

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International Journal of Fluid Machinery and Systems 2019年第1期12卷 64-70页

作者： Kim, Jin-Hyuk Cho, Bo-Min Kim, Sung Lee, Yong-Kab Choi, Young-Seok Thermal & Fluid System R&D Group Korea Institute of Industrial Technology 89 Yangdaegiro-gil Ipjang-myeon Seobuk-gu Cheonan-siChungcheongnam-do31056 Green Process and Energy System Engineering University of Science and Technology 217 Gajeong-ro Yuseong-gu Daejeon34113 Korea Republic of Anflux Co. Ltd. 27 Digital-ro 34-gil Guro-gu Seoul08378 Korea Republic of

This paper presents detailed analyses on the steady and unsteady internal flow characteristics of a three-stage centrifugal pump under design and off-design conditions. A numerical analysis is conducted by solving three dimensional steady and unsteady reynolds-averaged Navier–Stokes equations with the shear stress transport (SST) turbulence model. The results of the steady and unsteady numerical analyses throughout the flow region are analyzed and compared with experimental data. A reattachment modification is used in the SST turbulence model to better capture the characteristics of flow separation due to boundary layer reattachment under the design and off-design conditions. The unsteady numerical results are in reasonable agreement with the experimental data, whereas they differ from the steady numerical results when it comes to the internal flow fields at each component stage. In particular, the time averaged internal flow phenomena obtained from the unsteady analysis are close to the real field conditions of this pump at low flow rates. The hydraulic performances with and without the reattachment modification are similar throughout the flow region, whereas the respective flow characteristics in each impeller component are considerably different, particularly at low flow rates. © 2019, Turbomachinery Society of Japan. All rights reserved.

关键词： Turbulence models

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Assessing the Effectiveness of Virtual reality courseware for Experiential Learning

Assessing the Effectiveness of Virtual Reality Courseware fo...

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International Symposium on Educational technology (ISET)

作者： Jun Xiao Xuejiao Li Hui Qiao Xiaotong Liang Shanghai Engineering Research Center of Open Distance Education Shanghai Open University Shanghai China Modern Education Technology Center East China University of Science and Technology Shanghai China Flight Training Center China Eastern Airlines Technology Application R&D Center Co. Ltd Shanghai China Shanghai Normal University Shanghai China

ISBN: (数字)9781728171890

ISBN: (纸本)9781728171906

Virtual reality technology brings immersive learning experience to learners in a limited learning environment by restoring real situations as much as possible. It provides conditions for experiential learning. Experiential learning means that students actively construct knowledge from experience, which has the advantages of high participation and enthusiasm, and has gradually become the focus of research in the field of education. Our research adopts an experimental design method. From the perspective of adult higher education, 27 adult learners from Shanghai Open University were selected to carry out an experiential learning activity experiment based on Virtual reality courseware. The experiment takes learning satisfaction and behavioral willingness as indicators of experiential learning behavior. Investigate the effectiveness of Virtual reality courseware for experiential learning. The experiment finally revealed that the learning ability of learners and the perceived pleasure of learning content have a significant positive impact on learning satisfaction, and technology perceived ease of use and technology perceived usefulness have a positive impact on the behavioral willingness.

关键词： Educational technology

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