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通用CFD软件对微注塑成型模拟的适用性研究

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机械工程师 2013年第6期 74-76页

作者：杨灿富佳伟尹晓红关伟盛浙江师范大学工学院浙江金华321004 华南理工大学机械与汽车工程学院广州510640

微注塑成型(μIM)被认为是最具灵活性、可靠性以及成本优势的聚合物微/纳器件制造技术之一。因尺寸效应影响,μIM中熔体的流变行为以及微观因素的相对重要程度均发生明显变化。因此,很有必要对现有通用流体动力学(CFD)仿真软件处理微注... 详细信息

微注塑成型(μIM)被认为是最具灵活性、可靠性以及成本优势的聚合物微/纳器件制造技术之一。因尺寸效应影响,μIM中熔体的流变行为以及微观因素的相对重要程度均发生明显变化。因此,很有必要对现有通用流体动力学(CFD)仿真软件处理微注塑成型模拟过程的能力进行全面评估。文中采用案例研究方式,并与注塑成型专用模拟软件(Moldflow)进行对比。针对微注塑成型典型流动模式评估软件的模拟分析能力,具体比较模拟结果的一致性、计算速度以及综合考虑微观因素的灵活性,并在条件允许时将模拟结果与实验结果进行对比验证分析。

关键词：微注塑模拟适用性验证

混凝/平板膜光催化联合反应器工艺处理高速公路桥面雨水径流研究

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安全与环境学报 2017年第4期17卷 1465-1469页

作者：郭冀峰黄宇华关卫省崔倩倩赵建勋长安大学环境科学与工程学院旱区水文与生态效应教育部重点实验室西安710054 陕西省交通运输厅西安710075

运用混凝/平板膜光催化联合反应器工艺对穿越自然保护区的高速公路桥面雨水径流进行处理。首先,利用混凝沉淀将雨水中的悬浮物(SS)和CODCr进行去除。以SS、CODCr为去除对象,通过试验对聚合氯化铝(PAC)和聚合硫酸铝(PAS)两种混凝剂进行... 详细信息

运用混凝/平板膜光催化联合反应器工艺对穿越自然保护区的高速公路桥面雨水径流进行处理。首先,利用混凝沉淀将雨水中的悬浮物(SS)和CODCr进行去除。以SS、CODCr为去除对象,通过试验对聚合氯化铝(PAC)和聚合硫酸铝(PAS)两种混凝剂进行性能测定和比选,考察混凝剂的处理效果,以确定合适的混凝剂。结果显示,混凝剂PAS对雨水的处理效果好。经药剂混凝之后的水再用平板膜光催化反应器进行处理,其中膜技术可以将小分子及剩余SS去除,光催化技术可以将难降解物质去除,同时光催化技术中紫外灯可将出水中的细菌消灭,达到光催化降解污染物和消毒的双重功效。在最佳工艺运行条件即100 mg/L混凝剂聚合硫酸铝(PAS)投量下,经曝气量250L/(m2·h)、停留时间20 min的光催化平板膜反应器处理后,出水SS、CODCr去除率分别为100%和94.5%,可达到地表水环境质量标准(GB 3838—2002)Ⅱ类水的水质要求。

关键词：环境工程学高速公路桥面雨水混凝膜光催化反应器

Cyanidation of gold clay ore containing arsenic and manganese

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International Journal of Minerals,Metallurgy and Materials 2010年第2期17卷 132-136页

作者： Yu-liang Li Jian Liu wei-sheng guan School of Environmental Science and Engineering Chang＇an University Xi＇an 710054 China

The extraction process of gold and silver from the gold clay ore containing arsenic and manganese was *** the conventional technique,the leaching rates of gold and silver are 78.23%and 49.02%,*** eliminate the negative effects of arsenic and manganese on cyanidation and increase the gold and silver leaching rates,a novel catalyst was *** content of the catalyst used in the process was 8 g per 500 g org sample,the sample size was 60μm and the pH value was kept between 10 and *** with the catalyst for 3-5 h under certain conditions,the gold leaching rate increased to over 90%and the silver leaching rate increased to 80%-90%.The catalyst can effectively liberate gold and silver from the enclosure of arsenic and manganese and the industrial experiment has great significance to the development and utilization of the gold clay ore containing arsenic and manganese.

关键词： gold ore cyanidation catalyst gold silver leaching rate

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船舶生活污水处理技术研究

建筑科学与工程学报 2005年第2期22卷 90-94页

作者：董良飞蔡慧萍王经宇关卫省长安大学环境科学与工程学院陕西西安710064 武汉市江汉区环境保护局湖北武汉430010 西安市天然气总公司陕西西安710075

结合国内外现状及实船调查资料,对船舶生活污水的水量及水质特征进行研究,分析了影响船舶生活污水处理的因素,介绍了船舶生活污水处理的国内外研究现状,并探讨了处理技术的研究方向。结果表明,船舶生活污水排放的水力负荷变化较大,水质... 详细信息

结合国内外现状及实船调查资料,对船舶生活污水的水量及水质特征进行研究,分析了影响船舶生活污水处理的因素,介绍了船舶生活污水处理的国内外研究现状,并探讨了处理技术的研究方向。结果表明,船舶生活污水排放的水力负荷变化较大,水质随不同船型和卫生设备类型及排水系统形式有较大差异。膜生物法用于船舶生活污水处理具有良好的应用前景,国内应针对船舶生活污水处理开展相关研究。

关键词：船舶生活污水流动污染源水力特性污水水质污染负荷污水处理技术膜生物法

Structural optimization and design of purging plug for improving its service performance

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Journal of Iron and Steel Research International 2022年第4期29卷 628-635页

作者： Fang-guan Tan sheng-li Jin Zhu He Ya-wei Li The State Key Laboratory of Refractories and Metallurgy Wuhan University of Science and TechnologyWuhan 430081HubeiChina National-Provincial Joint Engineering Research Center of High Temperature Materials and Lining Technology Wuhan University of Science and TechnologyWuhan 430081HubeiChina Chair of Ceramics Montanuniversitaet LeobenLeoben 8700Austria

Purging plug with slits is widely used in the secondary refining process,and its service life determines the downtime and production *** achieve a good performance in service life,optimizing the geometric structure of the slit,which can alleviate the stress concentration around the slit,was employed using the finite plate ***,the performance of the purging plugs with different shapes of slits in the refining effect was investigated by conducting the water model *** numerical simulation results showed that the appropriate shapes of slits could alleviate the stress concentration *** the water model experiment,the mixing time of the purging plug with circular slits is lesser than that of the purging plug with rectangular slits when the gas flow is less than 6.02 L/*** with the rectangular slits,the circular slits are detrimental to smaller and well-distributed ***,the inclusion removal rate of the purging plug with circular slits is approximately 10%larger than that of the purging plug with the rectangular slits.

关键词： Purging plug Stress concentration Water model experiment Mixing time Inclusion removal Ladle metallurgy

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激光聚焦与激光打微孔实验设计

物理实验 2014年第12期34卷 6-9页

作者：敖霖管昇炜汪晓张增明张权朱玲赵伟中国科学技术大学物理学院安徽合肥230026 中国科学技术大学物理实验中心安徽合肥230026

利用激光束的高亮度、高方向性、高单色性等特点,让固体激光器所产生的激光依次通过光阑、准直镜组、聚焦透镜来获得光斑半径小、强度高的光束,并用其对金属靶材进行加工,得到了优于机械打孔的微孔.

关键词：激光准直激光聚焦腰斑半径微孔

Self-lubricating epoxy-based composite abradable seal coating eliminating adhesive transfer via hierarchical design

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Journal of Materials Science & Technology 2022年第9期104卷 145-154页

作者： Yun-qi Tong wei Li Qiu-sheng Shi Lin Chen guan-jun Yang State Key Laboratory for Mechanical Behavior of Materials School of Materials Science and EngineeringXi’an Jiaotong UniversityXi’an 710049China AECC Hunan Aviation Powerplant Research Institute Zhuzhou 412002China

Aluminum-based composite abradable seal coatings are pivotal to improving the efficiency of aero engines or gas ***,the adhesive transfer frequently occurs between metallic blade tips and aluminum-based composite coatings,resulting in engine vibration and even *** past studies had tried to solve this problem by reducing coating hardness,improving lubrication,or strengthening blade tips,but all had *** this paper,we proposed a novel epoxy-based composite abradable seal coating,eliminating adhesive transfer by changing metal-to-metal scraping pair to metal-to-polymer scraping *** coating was developed via a hierarchical structure *** spherical pores were uniformly distributed in the continuous epoxy matrix with fine graphite *** adding 20 vol.%graphite and 50 vol.%hollow microspheres,a self-lubricating epoxy-based coating of 0.26 friction coefficient with thermal conductivity of 0.28 W/(m·K),coating HR15 Y hardness at 54.8,and bonding strength at 18.7 MPa can be *** the metallic blades scrape the epoxy-based composite coating,no adhesive transfer ***,a smooth scraped surface is formed by pseudoplastic *** epoxy-based composite abradable seal coating opens a new way to improve the efficiency and reliable operations of air engine compressors.

关键词： Epoxy-based composite coating Hierarchical structure design Self-lubricating Pseudoplastic deformation

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热电偶测温技术在矿井防灭火中的应用

华北科技学院学报 2005年第3期2卷 31-33页

作者：管维生张显峰李玉民王玉怀张建伟开滦林南仓矿业分公司河北唐山063000 华北科技学院资源与环境工程系北京东燕郊101601

林南仓矿业分公司所开采的各煤层均属自然发火煤层,为加强工作面后方采空区的防火管理,对采空区自然氧化情况及时准确做出分析判断,在1019工作面的采空区运用热电偶技术进行温度监测,得到了工作面后方采空区温度变化的基本规律并将研究... 详细信息

林南仓矿业分公司所开采的各煤层均属自然发火煤层,为加强工作面后方采空区的防火管理,对采空区自然氧化情况及时准确做出分析判断,在1019工作面的采空区运用热电偶技术进行温度监测,得到了工作面后方采空区温度变化的基本规律并将研究成果应用于矿井安全生产,取得良好效果。

关键词：热电偶热电偶测温技术研究应用

Subretinal fibrosis secondary to neovascular age-related macular degeneration:mechanisms and potential therapeutic targets

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Neural Regeneration Research 2025年第2期20卷 378-393页

作者： Jingxiang Zhang Xia sheng Quanju Ding Yujun Wang Jiwei Zhao Jingfa Zhang Department of Ophthalmology People’s Hospital of Huangdao DistrictQingdaoShandong ProvinceChina Department of Urology People’s Hospital of Huangdao DistrictQingdaoShandong ProvinceChina Department of Ophthalmology Shanghai General Hospital(Shanghai First People’s Hospital)Shanghai Jiao Tong University School of MedicineShanghaiChina National Clinical Research Center for Eye Diseases Shanghai Key Laboratory of Ocular Fundus DiseasesShanghai Engineering Center for Visual Science and PhotomedicineShanghai Engineering Center for Precise Diagnosis and Treatment of Eye DiseasesShanghaiChina

Subretinal fibrosis is the end-stage sequelae of neovascular age-related macular *** causes local damage to photoreceptors,retinal pigment epithelium,and choroidal vessels,which leads to permanent central vision loss of patients with neovascular age-related macular *** pathogenesis of subretinal fibrosis is complex,and the underlying mechanisms are largely ***,there are no effective treatment options.A thorough understanding of the pathogenesis of subretinal fibrosis and its related mechanisms is important to elucidate its complications and explore potential *** current article reviews several aspects of subretinal fibrosis,including the current understanding on the relationship between neovascular age-related macular degeneration and subretinal fibrosis;multimodal imaging techniques for subretinal fibrosis;animal models for studying subretinal fibrosis;cellular and non-cellular constituents of subretinal fibrosis;pathophysiological mechanisms involved in subretinal fibrosis,such as aging,infiltration of macrophages,different sources of mesenchymal transition to myofibroblast,and activation of complement system and immune cells;and several key molecules and signaling pathways participating in the pathogenesis of subretinal fibrosis,such as vascular endothelial growth factor,connective tissue growth factor,fibroblast growth factor 2,platelet-derived growth factor and platelet-derived growth factor receptor-β,transforming growth factor-βsignaling pathway,Wnt signaling pathway,and the axis of heat shock protein 70-Toll-like receptors 2/*** review will improve the understanding of the pathogenesis of subretinal fibrosis,allow the discovery of molecular targets,and explore potential treatments for the management of subretinal fibrosis.

关键词： choroidal neovascularization epithelial-mesenchymal transition mesenchymal transition myofibroblast neovascular age-related macular degeneration submacular fibrosis subretinal fibrosis therapeutic targets transforming growth factor-β vascular endothelial growth factor