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Sealing performance and mechanical response of mud pump piston

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Petroleum 2023年第1期9卷 101-107页

作者： Jie Zhang wenjie jiang Pai Zhu Ting Zheng School of Mechatronic Engineering Southwest Petroleum UniversityChengdu610500China Oil and Gas Equipment Technology Sharing and Service Platform of Sichuan Province Chengdu610500China Luzhou Vocational and Technical College Luzhou646000China

In order to explore the effect of piston cup structure on its sealing characteristics and mechanical properties,a numerical simulation model of the piston cup in the BW-160 mud pump was *** of work load,friction coefficient and cup structure parameters on the sealing and mechanical properties of the piston were discussed under mud discharge *** results show that stress concentration on the root and lips of the cup is becoming more and more obvious with the working load *** average contact pressure increases with the friction coefficient increases,but an excessive friction coefficient accelerate the wear of the cup and the heat *** of the piston lip interference and thickness on the sealing performance of the cup is greater than that of the inner wall *** piston with groove structure can effectively improve the sealing performance of the *** mechanical properties of triangular groove cup are better than that of semicircular and trapezoidal groove cup.

关键词： Piston cup Sealing performance Mechanical property Groove structure

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碱性电解槽制氢技术的研究现状及发展趋势

西华大学学报(自然科学版) 2025年第1期44卷 168-180页

作者：尹诗斌蒋文杰文欢广西电化学能源材料重点实验室广西大学化学化工学院广西南宁530304

碱性电解槽技术作为制氢的关键途径,近年来得到了快速发展。文章综述了碱性电解槽的工作原理、性能指标及技术发展现状,并深入探讨了其发展趋势及技术创新方向。碱性电解槽技术因成本低、工艺成熟、易于大规模应用等优势,在电解水制氢... 详细信息

碱性电解槽技术作为制氢的关键途径,近年来得到了快速发展。文章综述了碱性电解槽的工作原理、性能指标及技术发展现状,并深入探讨了其发展趋势及技术创新方向。碱性电解槽技术因成本低、工艺成熟、易于大规模应用等优势,在电解水制氢领域占据重要地位。然而,随着氢能产业的不断发展,对电解槽的效率、稳定性及经济性提出了更高要求。未来,碱性电解槽技术将趋向大型化、集成化,并通过技术创新与优化,如开发新型高效催化剂、优化电解槽结构以及升级系统等提升其性能和经济性。同时,通过跨学科深度融合,为碱性电解槽技术的发展注入新的活力,推动氢能产业的持续进步与繁荣。

关键词：碱性介质电解槽电解水析氢反应析氧反应电解水制氢

Decoding the Molecular Mechanisms of BRAFV600E-Induced Nevi Formation

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Biomedical and Environmental Sciences 2024年第7期37卷 774-784页

作者： Weizheng Liang Yuxuan Liu Dandan Xu wenjie jiang Rensen Ran Central Laboratory The First Affiliated Hospital of Hebei North UniversityZhangjiakou 075000HebeiChina Institute of Molecular Immunology School of Laboratory Medicine and BiotechnologySouthern Medical UniversityGuangzhou 510515GuangdongChina Department of Artificial Intelligence and Data Science Hebei University of TechnologyTianjin 300401China Department of Chemical Biology School of Life SciencesSouthern University of Science and TechnologyShenzhen 518055GuangdongChina

Melanocytes derived from neural crest cells harbor the BRAFV600E mutation,which is the predominant driver of nevus formation in *** mutation leads to malignant cell proliferation and subsequent cell cycle arrest,culminating in oncogene-induced senescence and nevus ***,emerging evidence has highlighted the heterogeneity of cellular senescence markers in BRAFV600E-induced senescent ***,the capacity of melanocytes within nevi to regain their proliferative ability raises questions about the molecular mechanisms by which BRAFV600E,via the mitogen-activated protein kinase signaling pathway,triggers nevus *** study provides an overview and discussion of the molecular mechanisms underpinning BRAFV600E-induced melanocyte nevus formation and the relevant animal models employed for their *** also highlights the significance of elucidating dynamic changes in cytoplasmic and nuclear substrates that interact with phosphorylated extracellular signal-regulated protein kinases 1 and 2 and underscores the value of using targeted BRAFV600E animal models created through gene editing technologies.

关键词： BRAFV600E Melanocytes Nevi Oncogene-induced senescence Animal models

Strong electronic coupling of CoNi and N-doped-carbon for efficient urea-assisted H2 production at a large current density

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Carbon Energy 2023年第12期5卷 187-199页

作者： Guangfu Qian Jinli Chen wenjie jiang Tianqi Yu Kexin Tan Shibin Yin Guangxi Key Laboratory of Electrochemical Energy Materials College of Chemistry and Chemical EngineeringCollege of Light Industry and Food EngineeringGuangxi UniversityNanningChina

Exploiting efficient urea oxidation reaction(UOR)and hydrogen evolution reaction(HER)catalysts are significant for energy-saving H2 production through urea-assisted water electrolysis,but it is still ***,carbon-encapsulated CoNi coupled with CoNiMoO(CoNi@CN-CoNiMoO)is prepared by solvothermal method and calcination to enhance the activity/stability of urea-assisted water electrolysis at large current *** exhibits good activity for UOR(E10/1,000=1.29/1.40 V)and HER(E-10/-1000=-45/-245 mV)in 1.0 M KOH+0.5 M urea *** the UOR||HER system,CoNi@CN-CoNiMoO only needs 1.58 V at 500 mA cm-2 and shows good *** functional theory calculation suggests that the strong electronic interaction at the interface between NiCo alloy and N-doping-carbon layers can optimize the adsorption/desorption energy of UOR/HER intermediates and accelerate the water dissociation,which can expedite urea decomposition and Volmer step,thus increasing the UOR and HER activity,*** work provides a new solution to design UOR/HER catalysts for H2 production through urea-assisted water electrolysis.

关键词： carbon-encapsulated structure catalyst hydrogen production large current density urea-assisted water electrolysis

P2HBT: Partially Policy Hidden E-Healthcare System with Black-Box Traceability

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Chinese Journal of Electronics 2021年第2期30卷 219-231页

作者： YING Zuobin SI Yuanping MA Jianfeng jiang wenjie XU Shengmin LIU Ximeng School of Computer Science and Technology Anhui University Institutes of Physical Science and Information Technology Anhui University School of Computer Science and Technology Xidian University School of Information Systems Singapore Management University College of Mathematics and Computer Science Fuzhou University

Electronic health record(EHR), as the core of the e-healthcare system, is an electronic version of patient medical history, which records personal healthrelated information. EHR embodies the value of disease monitoring through large-scale sharing via the Cloud service provider(CSP). However, the health data-centric feature makes EHR more preferable to the adversaries compared with other outsourcing data. Moreover, there may even be malicious users who deliberately leak their access privileges for benefits. An e-healthcare system with a black-box traceable and robust data security mechanism is presented for the first time. Specifically, we propose an effective P2 HBT, which can perform fine-grained access control on encrypted EHRs, prevent the leakage of privacy contained in access policies, and support tracing of *** the standard model, the scheme is proved fully secure. Performance analysis demonstrates that P2HBT can achieve the design goals and outperform existing schemes in terms of storage and computation overhead.

关键词： outsourcing Cloud service provider malicious users effective P2HBT medical information systems partially policy hidden e-healthcare system electronic health record patient medical history security of data diseases black-box traceability data privacy authorisation electronic health records health data-centric feature cloud computing electronic version large-scale sharing access policies cryptography disease monitoring fine-grained access control health care outsourcing data black-box traceable robust data security mechanism encrypted EHRs personal health-related information access privileges EHR

Quantum Continual Learning Overcoming Catastrophic Forgetting

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Chinese Physics Letters 2022年第5期39卷 16-22页

作者： wenjie jiang Zhide Lu Dong-Ling Deng Center for Quantum Information IIISTsinghua UniversityBeijing 100084China Shanghai Qi Zhi Institute Shanghai 200232China

Catastrophic forgetting describes the fact that machine learning models will likely forget the knowledge of previously learned tasks after the learning process of a new *** is a vital problem in the continual learning scenario and recently has attracted tremendous concern across different *** explore the catastrophic forgetting phenomena in the context of quantum machine *** is found that,similar to those classical learning models based on neural networks,quantum learning systems likewise suffer from such forgetting problem in classification tasks emerging from various application *** show that based on the local geometrical information in the loss function landscape of the trained model,a uniform strategy can be adapted to overcome the forgetting problem in the incremental learning *** results uncover the catastrophic forgetting phenomena in quantum machine learning and offer a practical method to overcome this problem,which opens a new avenue for exploring potential quantum advantages towards continual learning.

关键词： overcome getting likely

基于政策工具的河北省科技创新人才政策文本分析

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经济论坛 2025年第1期 128-142页

作者：李欣栩姜文杰左延彬河北地质大学区域制度研究中心河北石家庄050031 河北师范大学汇华学院河北石家庄050091

科技创新人才是推动社会进步和经济发展的核心力量,有效的科技创新人才管理是确保人才资源高效配置和充分利用的关键。文章以河北省2016年7月10日以来发布的95份科技创新人才政策为样本,首先对政策的颁布时间、出台部门及形式进行分析... 详细信息

科技创新人才是推动社会进步和经济发展的核心力量,有效的科技创新人才管理是确保人才资源高效配置和充分利用的关键。文章以河北省2016年7月10日以来发布的95份科技创新人才政策为样本,首先对政策的颁布时间、出台部门及形式进行分析。随后,借助Nvivo14软件,基于Rothwell和Zegveld的政策工具分类方法,结合科技创新链和人才管理过程,构建三维分析框架,对样本进行单维和二维交叉分析。研究结果表明,河北省在科技创新人才管理中,应加强政策的稳定性和统筹性,加大对创新人才的支持力度,完善政策效果的评估和优化机制,合理配置具体政策工具。在围绕科技创新链管理科技创新人才的过程中,应加大资金投入,营造良好的制度环境,并加强与海外的交流合作。

关键词：科技创新人才政策科技创新链人才管理

高职学生参与沉浸式虚拟现实现场救护实训体验的质性研究

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卫生职业教育 2025年第06期43卷 61-64页

作者：奚兴蒋文婕朱晓艳周寒寒江苏卫生健康职业学院

目的探究高职学生参与沉浸式虚拟现实现场救护实训的学习体验。方法采用质性研究的描述性现象学研究方法，从32名在公众应急救护虚拟仿真实训基地参与沉浸式虚拟现实现场救护实训项目的高职学生中，选取8名学生进行半结构访谈，使用... 详细信息

目的探究高职学生参与沉浸式虚拟现实现场救护实训的学习体验。方法采用质性研究的描述性现象学研究方法，从32名在公众应急救护虚拟仿真实训基地参与沉浸式虚拟现实现场救护实训项目的高职学生中，选取8名学生进行半结构访谈，使用主题分析法对资料进行分析。结果总结出高职学生参与沉浸式虚拟现实现场救护实训项目学习体验的5个主题，包括：激发学习积极性、全方位真切感受到角色代入、即时交互反馈促进技能习得、同伴学习行为相互影响、内容和技术有一些缺陷。结论沉浸式虚拟现实现场救护实训为高职学生提供了直观、真实的学习体验，对于优化高职应急救护教育、提高应急救护教育质量具有重要意义，但也存在一些亟须解决的问题。

关键词：应急救护虚拟现实学习体验质性研究

Cycad-leaf-like crystalline-amorphous heterostructures for efficient urea oxidation-assisted water splitting

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Chinese Journal of Structural Chemistry 2024年第7期43卷 19-26页

作者： Rui Deng wenjie jiang Tianqi Yu Jiali Lu Boyao Feng Panagiotis Tsiakaras Shibin Yin Guangxi Key Laboratory of Electrochemical Energy Materials School of Chemistry and Chemical EngineeringGuangxi University100 Daxue RoadNanning530004China Laboratory of Electrochemical Devices Based on Solid Oxide Proton Electrolytes Institute of High Temperature Electrochemistry(RAS)Yekaterinburg620990Russian Federation Laboratory of Altemative Energy Conversion Systems Department of Mechanical Engineering School of EngineeringUniversity of ThessalyPedion Areos38834Greece

Developing efficient bifunctional catalysts for urea oxidation reaction(UOR)/hydrogen evolution reaction(HER)is important for energy-saving hydrogen ***,a catalyst with crystalline-amorphous hetero-structure supported by NiCo alloy on nickel foam(NiCoO-MoOx/NC)is reported for the first *** simple molybdenum salt etching,2D NiCo alloy nanosheets are transformed into a unique 3D cycad-leaf-like structure with a super-hydrophilic ***,the synergistic effect between crystalline NiCoO and amor-phous MoOx improves the UOR and HER activity,merely requiring 1.28 V and-45 mV potentials to reach±10 mA cm-2,***,the UOR kinetics of NiCoO-MoOx/NC is enhanced significantly compared to that of NiCoO/*** electronic structure of NiCoO is modified by MoOx,enabling the rapid generation of NiOOH and CoOOH active species,which would accelerate the synergistic electrocatalytic oxidation of urea *** work inspires the design of highly active and stable bifunctional catalysts for urea assisted H2 production.

关键词： Crystalline-amorphous Morphology modulation Urea oxidation reaction Hydrogen evolution reaction Super-hydrophilic