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Characterization of Swirling Inflow Effects on Turbine Performance under Pulsating Flows

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Journal of Thermal Science 2022年第5期31卷 1734-1744页

作者： DING Zhanming WANG Cuicui zhang junyue LIU Ying HOU Linlin ZHUGE Weilin zhang Yangjun Science and Technology on Diesel Engine Turbocharging Laboratory China North Engine Research InstituteTianjin300400China Kangyue Technology(Shandong)Co. LtdShouguangShandong262718China State Key Laboratory of Automotive Safety and Energy Tsinghua UniversityBeijing100084China

The present study focuses on the influence of the swirling flows on flow behaviors and performance of a radial-flow turbocharger turbine under pulsating inflow *** characterize the effects of swirling flow,three sets of simulations of the turbine were carried out,which are an unsteady simulation under pulsating swirling inflow,an unsteady simulation under equivalent pulsating uniform inflow,and quasi-steady simulations under uniform *** proved that swirling flow has a considerable negative influence on turbine instantaneous performance and lead to 2.5%cycle-averaged efficiency reduction under pulsating flow *** inflow would lead to significant losses in both the volute and the rotor,while the pulsating inflow leads to higher losses in the rotor and shows little influence on the losses in the *** instantaneous efficiency reduction of the turbine could be correlated with the time-varying inlet swirl *** the influence of unsteady inlet swirls,the volute flow field is highly distorted and the free vortex relation is no longer *** swirling flow has strong interactions with the wake flow of the volute tongue,leading to additional *** flow angle at rotor inlet is remarkably reduced and its distribution is significantly *** separation flows and passage vortices would appear in the rotor because of the swirling inflow,leading to inferior rotor performance.

关键词： swirling inflow pulsating flow CFD turbocharger turbine internal combustion engine

Recent advances in g-C_(3)N_(4)-based direct Z-scheme photocatalysts for environmental and energy applications

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Chinese Journal of Structural Chemistry 2024年第2期43卷 66-84页

作者： Xiaoming Fu Haibo Huang Guogang Tang Jingmin zhang junyue Sheng Hua Tang School of Intelligent Engineering and Technology Jiangsu Vocational College of Finance&EconomicsHuai'anJiangsu223003PR China School of Modem Equipment Manufacturing Changzhou Institute of Light Industry Technology ChangzhouJiangsu213164PR China School of Environmental Science and Engineering Qingdao UniversityQingdao266071PR China School of Materials Science and Engineering Hainan UniversityHaikou570228PR China

In the midst of the rapid advancement of photocatalysis,direct Z-scheme heterojunction photocatalysts have emerged as a powerful solution to address environmental challenges and the looming energy *** precise engineering of direct Z-scheme heterojunction photocatalysts proves highly beneficial in optimizing their elec-tronic structure,ultimately enhancing their photocatalytic ***,graphitic carbon nitride(g-C_(3)N_(4))has recently gained recognition as a leading candidate for the creation of direct Z-scheme heterojunctions,owing to its favorable attributes such as a moderate band-gap(2.7 eV),high reduction potential and abundant active *** this review,we offer a concise overview of the fundamental principles and recent advancements in g-C_(3)N_(4)-based direct Z-scheme photocatalytic ***,we delve into the various practical applica-tions of g-C_(3)N_(4)-based direct Z-scheme photocatalysts,specifically in the realms of energy conversion and envi-ronmental *** applications include the removal of contaminant pollutants through photocatalytic degradation,water splitting(comprising H_(2)-generation,O_(2)-evolution,and overall water splitting),and CO_(2)***,we present comprehensive characterization methods and strategies aimed at further enhancing the photocatalytic activity of g-C_(3)N_(4)-based direct Z-scheme photocatalytic *** conclude,this review offers summarizing insights and a brief discussion on future challenges and prospects pertaining to g-C_(3)N_(4)-based direct Z-scheme *** believe that this review will inspire continued exploration and foster a deeper understanding of the groundbreaking possibilities within photocatalytic *** also provides valuable guidance for the design and construction of innovative direct Z-scheme photocatalysts.

关键词： Carbon nitride Photocatalyst Z-scheme systems Environmental remediation Energy conversion

Lotus seedpod-inspired internal vascularized 3D printed scaffold for bone tissue repair

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Bioactive Materials 2021年第6期6卷 1639-1652页

作者： Xiaoyu Han Mingjie Sun Bo Chen Qimanguli Saiding junyue zhang Hongliang Song Lianfu Deng Peng Wang Weiming Gong Wenguo Cui Department of Orthopedics Jinan Central HospitalShandong First Medical University&Shandong Academy of Medical Sciences105 Jiefang RoadLixia DistrictJinanShandong250013PR China Shanghai Key Laboratory for Prevention and Treatment of Bone and Joint Diseases Shanghai Institute of Traumatology and OrthopedicsRuijin HospitalShanghai Jiao Tong University School of Medicine197 Ruijin 2nd RoadShanghai200025PR China

In the field of bone defect repair,3D printed scaffolds have the characteristics of personalized customization and accurate internal ***,how to construct a well-structured vascular network quickly and effectively inside the scaffold is essential for bone repair after ***,inspired by the unique biological structure of“lotus seedpod”,hydrogel microspheres encapsulating deferoxamine(DFO)liposomes were prepared through microfluidic technology as“lotus seeds”,and skillfully combined with a three-dimensional(3D)printed bioceramic scaffold with biomimetic“lotus”biological structure which can internally grow blood *** this composite scaffold system,DFO was effectively released by 36%in the first 6 h,which was conducive to promote the growth of blood vessels inside the scaffold *** the following 7 days,the release rate of DFO reached 69%,which was fundamental in the formation of blood vessels inside the scaffold as well as osteogenic differentiation of bone mesenchymal stem cells(BMSCs).It was confirmed that the composite scaffold could significantly promote the human umbilical vein endothelial cells(HUVECs)to form the vascular morphology within 6 h in *** vivo,the composite scaffold increased the expression of vascularization and osteogenic related proteins Hif1-α,CD31,OPN,and OCN in the rat femoral defect model,significantly cutting down the time of bone *** sum up,this“lotus seedpod”inspired porous bioceramic 3D printed scaffold with internal vascularization functionality has broad application prospects in the future.

关键词： 3D scaffolds Drug release Neovascularization Osteogenesis Regeneration

Radical Arbuzov Reaction

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CCS Chemistry 2024年第5期6卷 1312-1323页

作者： Linxiang Chai Jian Wang Jimin Yang junyue Yin Zhuyong zhang Yulu Cheng Lin Zhu Xiao-Song Xue Chaozhong Li Department of Chemistry University of Science and Technology of ChinaHefeiAnhui 230026 Shanghai Institute of Organic Chemistry Chinese Academy of SciencesShanghai 200032

The Arbuzov reaction(also known as the Michaelis–Arbuzov reaction)is one of the most fundamental transformations in organic chemistry and has been extensively used for the synthesis of organophosphorus compounds for over a ***,the reaction generally requires an elevated temperature and is applicable mainly to primary alkyl halides with poor functional group *** report herein a radical alternative to the conventional nucleophilic substitution ***,new radical phosphonylation reagents,9-fluorenyl o-phenylene phosphite and benzhydryl o-phenylene phosphite,have been developed for this *** photoredox-catalyzed reaction of a wide range of alkyl bromides or iodides with 9-fluorenyl(or benzhydryl)o-phenylene phosphite followed by workup with methanol(or ethanol)provides the corresponding dimethyl(or diethyl)alkylphosphonates in satisfactory yields at room temperature under mild *** method is applicable to primary,secondary,and even tertiary alkyl iodides and bromides and exhibits an excellent functional group tolerance,thereby enabling the late-stage modification of complex molecules and rapid synthesis of phosphonate-containing natural products and drug molecules.A mechanism involving the formation and subsequentβ-scission of phosphoranyl radicals is proposed.

关键词： Arbuzov reaction radicals phosphonylation photoredox catalysis alkyl halides

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固体火箭发动机试验测量系统零位变化研究

推进技术 1999年第3期20卷 103-106页

作者：张俊岳任敏周桂兰航天工业总公司31所

介绍了测试系统推力测量中常见的零位变化现象，对零位变化的原理进行了分析，并提出了针对性的数据处理方法。

关键词：固体火箭发动机热试车推力测量零位检查

Co-operative roles of IL-4Rαand IL-13Rα1 in the progression of ovarian carcinomas and the survival of ovarian carcinoma patients

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Cancer Communications 2023年第7期43卷 850-854页

作者： Won Ku Choi Usama Khamis Hussein Asmaa Gamal Ahmed junyue zhang Kyoung Min Kim Ae Ri Ahn Ho Sung Park See-Hyoung Park Dong Hyu Cho Kyu Yun Jang Department of Obstetrics and Gynecology Jeonbuk National University Medical SchoolJeonjuRepublic of Korea Department of Pathology Jeonbuk National University Medical SchoolJeonjuRepublic of Korea Faculty of Science Beni-Suef UniversityBeni-SuefEgypt School of Biomedical Informatics The University of Texas Health Science Center at HoustonHoustonTexasUSA Faculty of Postgraduate Studies and Advanced Sciences Beni-Suef UniversityBeni-SuefEgypt Department of Orthopedic Surgery Jeonbuk National University Medical SchoolJeonjuRepublic of Korea Department of Bio and Chemical Engineering Hongik UniversitySejongRepublic of Korea Research Institute of Clinical Medicine of Jeonbuk National University JeonjuRepublic of Korea Biomedical Research Institute of Jeonbuk National University Hospital JeonjuRepublic of Korea

Dear Editor,Recently,there has been a rise in interest in the roles of cytokines and cytokine receptors in malignant human *** receptors,especially typeⅡinterleukin-4 receptor(IL-4R),have recently been examined as novel therapeutic targets of human cancers[1-3].The typeⅡIL-4R complex is composed of IL-4Rαand interleukin-13 receptorα1(IL-13Rα1),and the expression of IL-4Rαand IL-13Rα1 was higher in cancer tissues compared with normal counterpart tissues[3,4].

关键词： operative patients cytokines

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太阳能采暖系统储热水箱体积匹配研究

太阳能学报 2020年第9期41卷 219-226页

作者：郭放张俊月田原杨旭东清华大学建筑技术科学系北京100084 赤峰和然节能科技股份有限公司赤峰024000 中国电建集团国际工程有限公司北京100048

以太阳能光热采暖系统的集热面积与储热水箱体积的匹配为研究对象,搭建基于小时级热量流动的太阳能采暖系统模型。基于此模型,对集热面积和储热体积匹配关系对系统运行效率、经济性及安全性的综合影响进行讨论。并以一个典型算例为例,... 详细信息

以太阳能光热采暖系统的集热面积与储热水箱体积的匹配为研究对象,搭建基于小时级热量流动的太阳能采暖系统模型。基于此模型,对集热面积和储热体积匹配关系对系统运行效率、经济性及安全性的综合影响进行讨论。并以一个典型算例为例,结合经济性分析方法,给出太阳能采暖系统最优集热面积和水箱体积的设计流程。研究表明:单位集热面积匹配储热体积的最优值并非是一个定值,而是与系统的总集热面积有很强的相关性。系统集热面积越大,单位集热面积对应的最优储热体积越大。相应地,系统的热损失也越大,单位集热面积的有效供热量越小。因此,需要从集热量与热损失2个方面综合权衡系统规模,并合理匹配储热体积,以保证系统运行的经济性和安全性。

关键词：太阳能太阳能采暖太阳热水系统设计储热水箱

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固体火箭发动机试验故障错判案例启示

推进技术 1998年第5期19卷 15-19页

作者：张俊岳航天工业总公司31所

介绍了一个固体火箭发动机试验中的关联性试验故障错判案例，分析了由于验证方法不当引起错判的原因，并提出了在试验故障分析时要把验证方法写入故障图、对验证方法也要验证、对验证方法应根据重要性、价格等因素分别进行重点分析的故... 详细信息

介绍了一个固体火箭发动机试验中的关联性试验故障错判案例，分析了由于验证方法不当引起错判的原因，并提出了在试验故障分析时要把验证方法写入故障图、对验证方法也要验证、对验证方法应根据重要性、价格等因素分别进行重点分析的故障分析观点。

关键词：固体火箭发动机发动机试验故障诊断故障树

供应链合作关系调节效应研究——基于成熟企业与新创企业的对比

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科技进步与对策 2013年第8期30卷 95-101页

作者：李忆张俊岳刘小平重庆邮电大学经济管理学院重庆400065

由于具有不同的资源基础、组织经验和市场地位,成熟企业和新创企业在供应链合作中往往表现出不同的专用性投资行为。基于交易费用理论、资源依赖理论和风险管理理论,研究了合作与专用性投资之间关系的调节变量。将314家供应商分为成熟... 详细信息

由于具有不同的资源基础、组织经验和市场地位,成熟企业和新创企业在供应链合作中往往表现出不同的专用性投资行为。基于交易费用理论、资源依赖理论和风险管理理论,研究了合作与专用性投资之间关系的调节变量。将314家供应商分为成熟企业和新创企业进行实证研究,发现信任和依赖对合作与专用性投资之间的关系具有调节作用,但在成熟企业和新创企业中的调节作用不同。其中,信任在成熟企业中的调节作用为正向,在新创企业中为负向;依赖在成熟企业中的调节作用不显著,在新创企业中为正向。

关键词：供应链合作专用性投资信任依赖调节效应