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19篇 您的检索式:作者名="Haomin Chen"
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1Investigation of Surface Damage in Forming of High Strength and Galvanized Steel Sheets显示文摘Powdering/exfoliating of coatings and scratching are the main forms of surface damage in the forming of galvanized steels and high strength steels (HSS), which result in increased die maintenance cost and scrap rate. In this study, a special rectangular box was developed to investigate the behavior and characteristics of surface damage in sheet metal forming (SMF) processes. U-channel forming tests were conducted to study the effect of tool hardness on surface damage in the forming of high strength steels and galvanized steels (hot-dip galvanized and galvannealed steels). Experimental results indicate that sheet deformation mode influences the severity of surface damage in SMF and surface damage occurs easily at the regions where sheet specimen deforms under the action of compressive stress. Die corner is the position where surface damage initiates. For HSS sheet, surface damage is of major interest due to high forming pressure. The HSS and hot-dip galvanized steels show improved ability of damage-resistance with increased hardness of the forming tool. However, for galvannealed steel it is not the forming tool with the highest hardness value that performs best.Zhongqi Yu Yingke Hou Haomin Jiang Xinping Chen Weigang Zhang 2009Journal of Materials Science & Technology2009,25,3:4
2Anisotropic,Wrinkled,and Crack-Bridging Structure for Ultrasensitive,Highly Selective Multidirectional Strain Sensors显示文摘Flexible multidirectional strain sensors are crucial to accurately determining the complex strain states involved in emerging sensing applications.Although considerable efforts have been made to construct anisotropic structures for improved selective sensing capabilities,existing anisotropic sensors suffer from a trade-off between high sensitivity and high stretchability with acceptable linearity.Here,an ultrasensitive,highly selective multidirectional sensor is developed by rational design of functionally different anisotropic layers.The bilayer sensor consists of an aligned carbon nanotube(CNT)array assembled on top of a periodically wrinkled and cracked CNT-graphene oxide film.The transversely aligned CNT layer bridge the underlying longitudinal microcracks to effectively discourage their propagation even when highly stretched,leading to superior sensitivity with a gauge factor of 287.6 across a broad linear working range of up to 100%strain.The wrinkles generated through a pre-straining/releasing routine in the direction transverse to CNT alignment is responsible for exceptional selectivity of 6.3,to the benefit of accurate detection of loading directions by the multidirectional sensor.This work proposes a unique approach to leveraging the inherent merits of two cross-influential anisotropic structures to resolve the trade-off among sensitivity,selectivity,and stretchability,demonstrating promising applications in full-range,multi-axis human motion detection for wearable electronics and smart robotics.Heng Zhang Dan Liu Jeng-Hun Lee Haomin Chen Eunyoung Kim Xi Shen Qingbin Zheng Jinglei Yang Jang-Kyo Kim 2021Nano-Micro Letters2021,13,8:3
3ExExperimental and numerical studies on the prediction of bendability limit of QSTE340 welded tube in NC bending process显示文摘For a low carbon steel tube with small wall factor D/t and bending radius R,the over-thinning induced localized necking is one dominant failure in tube numerical control(NC) bending process,which strongly restricts the bendability limit of the tube.In addition,the deterioration of bendability of a tube is increased by the existence of the weak weld region.Therefore,an important issue is how to determinate and predict the welded tube bendability limit.In the present study,a finite element(FE) model with weld and subdivided heat affected zones under ABAQUS platform is employed to explore the deformation behaviors of welded tube NC bending.A localized necking criterion based on the critical thickness thinning is used to predict the critical principal strains,critical bending radius and burst location during the forming process.It is found that the failures always occur at the rigid supporting point of mandrel flexible balls near the tangent point at the outside of the bend,where the wall thickness of the tube is the lowest.The bending limit curves(BLCs) of the QSTE340 welded tube are obtained by shifting the standard shaped forming limit curve to the critical principal strains along the major strain axis.Comparison between the numerical and experimental results has shown that the BLC and critical bending radius predictions agree well with the experimental results.In addition,the effect of weld positions on BLC is discussed,the weld region shows an almost negligible effect on the forming limit at a non-critical location that is far away from the outside of the bend.However,when the weld is at the large tensile deformation region on the outside of the bend,a decrease of the forming limit strains is seen.YANG He REN Ning ZHAN Mei ZHANG ZhiYong QIN YaTao JIANG HaoMin DIAO KeShan CHEN XinPing 2012Science China(Technological Sciences)2012,55,8:2
4Volatile organic compounds concentration profiles and control strategy in container manufacturing industry:Case studies in China显示文摘Volatile organic compounds(VOCs),important precursors of ozone(O_(3))and fine particulate matter(PM_(2.5)),are the key to curb the momentum of O_(3)growth and further reducing PM_(2.5)in China.Container manufacturing industry is one of the major VOC emitters,and more than 96%containers of the world are produced in China,with the annual usage of coatings of over 200,000 tons in recent years.This is the first research on the emission characteristics of VOCs in Chinese container manufacturing industry,including concentration and ozone formation potential(OFP)of each species.The result shows that the largest amounts of VOCs are emitted during the pretreatment process,followed by the paint mixing process and primer painting process,and finally other sprays process.The average VOC concentrations in the workshops,the exhausts before treatment and the exhausts after treatment are ranging from 82.67–797.46,170–1,812.65,66.20–349.63 mg/m^(3),respectively.Benzenes,alcohols and ethers are main species,which contribute more than 90%OFP together.Based on the emission characteristics of VOCs and the technical feasibility,it is recommended to set the emission limit in standard of benzene to 1.0 mg/m^(3),toluene to 10 mg/m^(3),xylene to 20 mg/m^(3),benzenes to 40 mg/m^(3),alcohols and ethers to 50 mg/m^(3),and VOCs to 100 mg/m^(3).The study reports the industry emission characteristics and discusses the standard limits,which is a powerful support to promote VOCs emission reduction,and to promote the coordinated control of PM_(2.5)and O_(3)pollution.Yunting Ke Ruiyuan Liu Xiaofang Chen Yang Feng Ping Gao Haomin Huang Liya Fan Daiqi Ye 2021Journal of Environmental Sciences2021,33,6:2
5Influence of seeding promoters on the properties of CVD grown monolayer molybdenum disulfide显示文摘Chemical vapor deposition (CVD) is the most efficient method to grow large-area two dimensional (2D) transition metal dichiacogenides (TMDCs) in high quality.Monolayer molybdenum disulfide (MoS2) and seed-assistant are the mostly selected 2D TMDC and growth strategy for such CVD processes,respectively.Though the advantages of seed catalysts in facilitating the nucleation,achieving higher yield and better repeatability,as well as their effects on the morphologies of as-grown MoS2 have been studied,the influence of seeding promoters on both optical and electrical properties of as-grown monolayer MoS2 is not known comprehensively,which is indeed critical for understanding fundamental physics and developing practical application of such emerging 2D semiconductors.In this report,we systematically investigated the effect of different seeding promoters on the properties of CVD-grown monolayer MoS2.It is found that different seed molecules lead to different impacts on the optical and electrical properties of as-grown monolayer MoS2.Among three different seed catalysts (perylene-3,4,9,10-tetracarboxylic acid tetrapotassium salt (PTAS),copper phthalocyanine (CuPc),and crystal violet (CV)),PTAS performs better in obtaining large area monolayer MoS2 with good optical quality and high electrical mobility than the other two.Our work gives a guide for modifying the properties of as-grown monolayer MoS2 and other 2D transition metal dichalcogenides in seeding promoters-assisted synthesis process.Peng Yang Ai-Guo Yang Lingxiu Chen Jing Chen Youwei Zhang Haomin Wang Laigui Hu Rong-Jun Zhang Ran Liu Xin-Ping Qu Zhi-Jun Qiu Chunxiao Cong 2019Nano Research2019,12,4:2
6Preparation and characterization of porous hollow silica nanoparticles for drug delivery application显示文摘CHEN Jianfeng DING Haomin WANG Jiexin 2004Biomaterials2004,25,4:1
72020 Roadmap on gas-involved photo-and electro-catalysis显示文摘Green reactions not only provide us chemical products without any pollution,but also offer us the viable technology to realize difficult tasks in normal conditions.Photo-,photoelectro-,and electrocatalytic reactions are indeed powerful tools to help us to embrace bright future.Especially,some gas-involved reactions are extremely useful to change our life environments from energy systems to liquid fuels and cost-effective products,such as H2 evolution(H2 production),02 evolution/reduction,CO2 reduction,N2 reduction(or N2 fixation) reactions.We can provide fuel cells clean H2 for electric vehicles from H2 evolution reaction(HER),at the same time,we also need highly efficient 02 reduction reaction(ORR) in fuel cells for improving the reaction kinetics.Moreover,we can get the clean oxidant O2 from water through O2 evolution reaction(OER),and carry out some reactions without posing any pollution to reaction systems.Furthermore,we can translate the greenhouse gas CO2 into useful liquid fuels through CO2 reduction reaction(CRR).Last but not the least,we can get ammonia from N2 reduction reaction(NRR),which can decrease energy input compared to the traditional Hubble process.These reactions,such as HER,ORR,OER,CRR and NRR could be realized through solar-,photoelectro-and electro-assisted ways.For them,the catalysts used play crucial roles in determining the efficiency and kinds of products,so we should consider the efficiency of catalysts.However,the cost,synthetic methods of catalysts should also be considered.Nowadays,significant progress has been achieved,however,many challenges still exist,reaction systems,catalysts underlying mechanisms,and so on.As extremely active fields,we should pay attention to them.Under the background,it has motivated us to contribute with a roadmap on ’GasInvolved Photo-and Electro-Catalysis’.Yulu Yang Yang Tang Haomin Jiang Yongmei Chen Pingyu Wan Maohong Fan Rongrong Zhang Sana Ullah Lun Pan Ji-Jun Zou Mengmeng Lao Wenping Sun Chao Yang Gengfeng Zheng Qiling Peng Ting Wang Yonglan Luo Xuping Sun Alexander S.Konev Oleg V.Levin Panagiotis Lianos Zhuofeng Hu Zhurui Shen Qinglan Zhao Ying Wang Nadia Todorova Christos Trapalis Matthew V.Sheridan Haipeng Wang Ling Zhang Songmei Sun Wenzhong Wang Jianmin Ma 2019Chinese Chemical Letters2019,30,12:1
8Fundamental principles and development of proximity-field nanopatterning toward advanced 3D nanofabrication显示文摘Three-dimensional(3D)nanoarchitectures have offered unprecedented material performances in diverse applications like energy storages,catalysts,electronic,mechanical,and photonic devices.These outstanding performances are attributed to unusual material properties at the nanoscale,enormous surface areas,a geometrical uniqueness,and comparable feature sizes with optical wavelengths.For the practical use of the unusual nanoscale properties,there have been developments for macroscale fabrications of the 3D nanoarchitectures with process areas over centimeter scales.Among the many fabrication methods for 3D structures at the nanoscale,proximity-field nanopatterning(PnP)is one of the promising techniques that generates 3D optical holographic images and transforms them into material structures through a lithographic process.Using conformal and transparent phase masks as a key factor,the PnP process has advantages in terms of stability,uniformity,and reproducibility for 3D nanostructures with periods from 300 nm to several micrometers.Other merits of realizing precise 3D features with sub-100 nm and rapid processes are attributed to the interference of coherent light diffracted by phase masks.In this review,to report the overall progress of PnP from 2003,we present a comprehensive understanding of PnP,including its brief history,the fundamental principles,symmetry control of 3D nanoarchitectures,material issues for the phase masks,and the process area expansion to the wafer-scale for the target applications.Finally,technical challenges and prospects are discussed for further development and practical applications of the PnP technique.Sang-Hyeon Nam Gayea Hyun Donghwi Cho Seonggon Han Gwangmin Bae Haomin Chen Kisun Kim Youngjin Ham Junyong Park Seokwoo Jeon 2021Nano Research2021,14,9:1
9POROUS SILICA NANO-TUBE AS HOST FOR ENZYME IMMOBILIZATION显示文摘With their hollow morphology and large openings, the as-synthesized porous silica nano-tubes (NTPS), prepared through a sol-gel routine by using nano-sized needle-shaped CaCO3 particles as templates, were used as host for enzyme immobilization. Bioimmobilization study showed that enzyme molecules could not only be adsorbed on the external surface of NTPS but also entrapped in their inner hollow cores, leading to higher enzyme loading capacities of NTPS (more than 350 mg/g silica) in a shorter time, as compared to common porous silica (less than 50 mg/g) and most conventional mesoporous silica materials (less than 100 mg/g).Haomin Ding, Lixiong Wen and Jianfeng Chen* Key Lab for Nanomaterials, Ministry of Education Research Center of the Ministry of Education for High Gravity Engineering & Technology, Beijing University of Chemical Technology, Beijing 100029, P. R. China *Author to whom correspondence should be addressed. E-mail: chenjf@mail.buct.edu.cn 2004China Particuology2004,2,6:1
10New Progress in the Application of Satellite Thermal Infrared Imagery to Earthquake Prediction显示文摘The concept of stochastic resonance (SR) has been introduced into the analysis of satellite thermal infrared images. Six kinds of anomalous phenomena related to crustal movement were recognized in satellite thermal infrared images. Six diagnostic indicators for the prediction of global earthquakes with magnitude ≥6.0 and their quantitative evaluation standards have been established. The microscopic behavior of global crustal movement is successfully controlled by using satellite thermal infrared imagery, and the occurrence time and magnitude of over 80% of global strong earthquakes occurred since the foundation of the observation station have been successfully predicted. It is believed that the combination of satellite thermal infrared information with macroscopic anomalous phenomena will play an important role in earthquake hazard reduction.Xu Haomin, Wang Yu, Tang Fangtou and Chen MeihuaInstitute of Geology, China Seismological Bureau, Beijing 100029, China 2002Earthquake Research in China2002,16,2:1
11Preparation and characterization of porous hollow silica nanoparticles for drug deliveryapplication显示文摘CHEN Jianfeng DING Haomin WANG Jiexin 2004Biomaterials2004,25,:1
12Pathogenesis of premature coronary artery disease:Focus on risk factors and genetic variants显示文摘The development of premature coronary artery disease(PCAD)is dependent on both genetic predisposition and traditional risk factors.Strategies for unraveling the genetic basis of PCAD have evolved with the advent of modern technologies.Genome-wide association studies(GWASs)have identified a considerable number of common genetic variants that are associated with PCAD.Most of these genetic variants are attributable to lipid and blood pressure-related single-nucleotide polymorphisms(SNPs).The genetic variants that predispose individuals to developing PCAD may depend on race and ethnicity.Some characteristic genetic variants have been identified in Chinese populations.Although translating this genetic knowledge into clinical applications is still challenging,these genetic variants can be used for CAD phenotype identification,genetic prediction and therapy.In this article we will provide a comprehensive review of genetic variants detected by GWASs that are predicted to contribute to the development of PCAD.We will highlight recent findings regarding CAD-related genetic variants in Chinese populations and discuss the potential clinical utility of genetic variants for preventing and managing PCAD.Haiming Wang Zifan Liu Junjie Shao Min Jiang Xuechun Lu Lejian Lin Lin Wang Qiang Xu Haomin Zhang Xin Li Jingjing Zhou Yundai Chen Ran Zhang 2022Genes & Diseases2022,9,2:1
13Preparation and characterization of porous hollow silica nanoparticles for drug delivery application 显示文摘CHEN Jianfeng DING Haomin WANG Jiexin 2004Biomaterials2004,25,4:1
14Preparation and characterization of porous hollow silica nanoparticles for drug delivery application显示文摘Chen Jianfeng Ding Haomin 2004Biomaterials2004,25,:1
15Preparation and characterization of porous hollow silica nanoparticles for drug delivery application显示文摘Chen Jianfeng Ding Haomin Wang Jiexin Shao Lei 2004Biomaterials2004,25,:1
16Preparation and characterization of porous hollow silica nanoparticles for drug delivery application显示文摘CHEN Jianfeng DING Haomin WANG Jiexin 2004Biomaterials2004,25,4:1
17Bioinformatics analysis of SARS-CoV-2 infectionassociated immune injury and therapeutic prediction for COVID-19显示文摘Background:Severe acute respiratory syndrome coronavirus 2 is a highly contagious viral infection,without any available targeted therapies.The high mortality rate of COVID-19 is speculated to be related to immune damage.Methods:In this study,clinical bioinformatics analysis was conducted on transcriptome data of coronavirus infection.Results:Bioinformatics analysis revealed that the complex immune injury induced by coronavirus infection provoked dysfunction of numerous immune-related molecules and signaling pathways,including immune cells and toll-like receptor cascades.Production of numerous cytokines through the Th17 signaling pathway led to elevation in plasma levels of cytokines(including IL6,NF-kB,and TNF-a)followed by concurrent inflammatory storm,which mediates the autoimmune response.Several novel medications seemed to display therapeutic effects on immune damage associated with coronavirus infection.Conclusions:This study provided insights for further large-scale studies on the target therapy on reconciliation of immunological damage associated with COVID-19.Haomin Zhang Haoran Chen Jundong Zhang Ximeng Chen Bin Guo Peng Zhi Zhuoyang Li Geliang Liu Bo Yang Xiaohua Chi Yixing Wang Feng Cao Jun Ren Xuechun Lu 2021Emergency and Critical Care Medicine2021,1,1:0
18Evaluation of DNA adduct damage using G-quadruplex-based DNAzyme显示文摘Toxicity assessment is a major problem in pharmaceutical candidates and industry chemicals development.However,due to the lack of practical analytical methods for DNA adduct analysis,the safety evaluation of drug and industry chemicals was severely limited.Here,we develop a DNAzyme-based method to detect DNA adduct damage for toxicity assessment of drugs and chemicals.Among 18 structural variants of G4 DNAzyme,EA2 DNAzyme exhibits an obvious DNA damaging effect of styrene oxide(SO)due to its unstable structure.The covalent binding of SO to DNAzyme disrupts the Hoogsteen hydrogen bonding sites of G-plane guanines and affects the formation of the G4 quadruplex.DNA damage chemicals reduce the peroxidase activity of the G4 DNAzyme to monitor the DNA adduct damage by disrupting the structural integrity of the G4 DNAzyme.Our method for genotoxic assessment of pharmaceutical candidates and industrial chemicals can elucidate the complex chemical pathways leading to toxicity,predict toxic effects of chemicals,and evaluate possible risks to human health.Yi Xiao Haomin Yi Jingzhi Zhu Suhua Chen Guofang Wang Yilong Liao Yuanyuan Lei Liyin Chen Xingcai Zhang Fangfu Ye 2023Bioactive Materials2023,,5:0
19Direct conversion of methane to methanol by electrochemical methods显示文摘A convenient method for methane(CH_(4))direct conversion to methanol(CH_(3)OH)is of great significance to use methane-rich resources,especially clathrates and stranded shale gas resources located in remote regions.Theoretically,the activation of CH_(4) and the selectivity to the CH_(3)OH product are challenging due to the extreme stability of CH_(4) and relatively high reactivity of CH_(3)OH.The state-of-the-art‘methane reforming-methanol synthesis’process adopts a two-step strategy to avoid the further reaction of CH_(3)OH under the harsh conditions required for CH_(4) activation.In the electrochemical field,researchers are trying to develop conversion pathways under mild conditions.They have found suitable catalysts to activate the C–H bonds in methane with the help of external charge and have designed the electrode reactions to continuously generate certain active oxygen species.These active oxygen species attack the activated methane and convert it to CH_(3)OH,with the benefit of avoiding over-oxidation of CH_(3)OH,and thus obtain a high conversion efficiency of CH_(4) to CH_(3)OH.This mini-review focuses on the advantages and challenges of electrochemical conversion of CH4 to CH_(3)OH,especially the strategies for supplying electro-generated active oxygen species in-situ to react with the activated methane.Haomin Jiang Luting Zhang Zhiwei Han Yang Tang Yanzhi Sun Pingyu Wan Yongmei Chen Morris D.Argyle Maohong Fan 2022Green Energy & Environment2022,7,6:0
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