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| 1 | Preparation of nano-sized Bi_2Te_3 thermoelectric material powders by cryogenic grinding | Xiaozong Chen a, Leifeng Liu b, Yuan Dong a, Lianjun Wang a, Lidong Chen c, Wan Jiang a, a State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, Donghua University, 2999 people of North Road, Shanghai 201620, PR China b Department of Materials and Environmental Chemistry, Stockholm University, SE-106 91 Stockholm, Sweden c Shanghai Institute of Ceramics, Chinese Academy of Sciences, 1295 Dingxi Road, Shanghai 200050, PR China | 2012 | Progress in Natural Science:Materials International2012，22，3： | 8 |
| 2 | Virus-induced Phytoene Desaturase(PDS) Gene Silencing Using Tobacco Rattle Virus in Lilium × formolongi显示文摘Gene function analysis is challenging for Lilium due to the lack of an efficient method for stable genetic transformation. Virus-induced gene silencing(VIGS) is an attractive tool for determining gene function in plants. This study reported that Tobacco rattle virus(TRV)-based VIGS of a PHYTOENE DESATURASE(PDS) ortholog(LhPDS) can be achieved in Lilium × formolongi seedlings, with a survival rate of 92%, using the inoculation method of rubbing plus injection. Compared with untreated and mock-treated seedlings, the photobleached leaf phenotype of silenced plants significantly correlates with down-regulation of endogenous LhPDS(P ≤ 0.05). In addition, the silencing phenomenon can be observed in the growing points of plants, indicating that systemic viral infection was achieved using the protocol. The results indicate that TRV-based VIGS can be used to characterize gene function in Lilium × formolongi. This work lays the foundation for gene function analysis and molecular breeding in Lilium spp. | Hua Xu Leifeng Xu Panpan Yang Yuwei Cao Yuchao Tang Guoren He Suxia Yuan Jingyi Lei Jun Ming | 2019 | Horticultural Plant Journal2019，5，1： | 6 |
| 3 | Oxide dispersion strengthened stainless steel 316L with superior strength and ductility by selective laser melting显示文摘Dense oxide dispersion strengthened(ODS) 316 L steels with different amount of Y2O3 additions were succe s s fully fabricated by selective laser melting(SLM) even though part of the added Y2O3 got lost during the process.The microstructure was characterized in details and the mechanical properties were tested at room temperature,250℃ and 400℃,respectively.The effect of the scanning speed on agglomeration of nanoparticles during SLM process was discussed.Superior properties,e.g.,yield strength of 574 MPa and elongation of 91%,were achieved at room temperature in SLM ODS 316 L with additional 1% of Y2 O3.At elevated temperature s,the strength kept high but the elongations dropped dra matically.It was observed that nano-voids nucleated throughout the whole gauge section at the sites where nanoinclusions located.The growth and coalescence of these voids were suppre s sed by the formation of an element segregation network before necking,which relieved local stress concentration and thus delayed necking.This unusual necking behavior was studied and compared to the previous theory.It appeared that the strong convection presented in the melt pool can evenly redistribute the short-time milled coarse Y2O3 precursor powder during SLM process.These findings can not only solve the problems encountered during the fabrication of ODS components but also replenish the strengthening mechanism of SLM 316 L thus pave a way for further improving of mechanical properties. | Yuan Zhong Leifeng Liu Ji Zou Xiaodong Li Daqing Cui Zhijian Shen | 2020 | Journal of Materials Science & Technology2020，42，7： | 5 |
| 4 | Research status and progress of hot stamping显示文摘In this article,current application,materials,key equipments,finite element(FE) simulation and parts properties of hot stamping are introduced.The investigations of all processes and further excellent processes are described.The survey of existing works,especially key equipments has revealed several gaps.Some new ideas and programs are proposed on the basis of traditional process.This article aims at providing an insight into a whole process backgrounds and pointing out the great potential for further investigations and innovations of hot stamping. | Song Leifeng Ma Mingtu Guo Yihui Fang Gang Liu Qiang Yao Zaiqi | 2012 | Engineering Sciences2012，10，6： | 4 |
| 5 | Numerical simulation of hot stamping of side impact beam显示文摘Ls-DYNA software is adopted to conduct research of numerical simulation on hot stamping of side impact beam to calculate the temperature field distribution,stress field distribution,forming limit diagram(FLD) figure,etc.in the course of hot stamping so as to predict and analyze the formability of parts.ProCAST software is employed to conduct research of numerical simulation on solid quenching course concerning hot stamping to calculate temperature field distribution of tools and component of multiple stamping cycles.The results obtained from numerical simulation can provide significant reference value to hot stamping part design,formability predication and tools cooling system design. | Guo Yihui Ma Mingtu Fang Gang Song Leifeng Liu Qiang Wang Xiaona Zhou Dianwu | 2012 | Engineering Sciences2012，10，6： | 4 |
| 6 | Emission source-based ozone isopleth and isosurface diagrams and their significance in ozone pollution control strategies显示文摘In the past decade,ozone(O_(3))pollution has been continuously worsening in most developing countries.The accurate identification of the nonlinear relationship between O_(3) and its precursors is a prerequisite for formulating effective O_(3) control measures.At present,precursor-based O_(3) isopleth diagrams are widely used to infer O_(3) control strategy at a particular location.However,there is frequently a large gap between the O_(3)-precursor nonlinearity delineated by the O_(3) isopleths and the emission source control measures to reduce O_(3) levels.Consequently,we developed an emission source-based O_(3) isopleth diagram that directly illustrates the O_(3) level changes in response to synergistic control on two types of emission sources using a validated numerical modeling system and the latest regional emission inventory.Isopleths can be further upgraded to isosurfaces when co-control on three types of emission sources is investigated.Using Guangzhou and Foshan as examples,we demonstrate that similar precursor-based O_(3) isopleths can be associated with significantly different emission source co-control strategies.In Guangzhou,controlling solvent use emissions was the most effective approach to reduce peak O_(3) levels.In Foshan,co-control of on-road mobile,solvent use,and fixed combustion sources with a ratio of 3:1:2 or 3:1:3 was best to effectively reduce the peak O_(3) levels below 145 ppbv.This study underscores the importance of using emission source-based O_(3) isopleths and isosurface diagrams to guide a precursor emission control strategy that can effectively reduce the peak O_(3) levels in a particular area. | Huihong Luo Kaihui Zhao Zibing Yuan Leifeng Yang Junyu Zheng Zhijiong Huang Xiaobo Huang | 2021 | Journal of Environmental Sciences2021，33，7： | 3 |
| 7 | Linking a Storm Water Management Model to a Novel Two-Dimensional Model for Urban Pluvial Flood Modeling显示文摘This article describes a new method of urban pluvial flood modeling by coupling the 1D storm water management model(SWMM)and the 2D flood inundation model(ECNU Flood-Urban).The SWMM modeling results(the overflow of the manholes)are used as the input boundary condition of the ECNU Flood-Urban model to simulate the rainfall–runoff processes in an urban environment.The analysis is applied to the central business district of East Nanjing Road in downtown Shanghai,considering 5-,10-,20-,50-,and 100-year return period rainfall scenarios.The results show that node overflow,water depth,and inundation area increase proportionately with the growing return periods.Water depths are mostly predicted to be shallow and surface flows generally occur in the urban road network due to its low-lying nature.The simulation result of the coupled model proves to be reliable and suggests that urban surface water flooding could be accurately simulated by using this methodology.Adaptation measures(upgrading of the urban drainage system)can then be targeted at specific locations with significant overflow and flooding. | Yuhan Yang Leifeng Sun Ruonan Li Jie Yin Dapeng Yu | 2020 | International Journal of Disaster Risk Science2020，11，4： | 3 |
| 8 | Study on the resistance spot welding technology of 22MnMoB hot stamping quenched steel显示文摘In this paper,the spot welding technology of a new kind of 22 MnMoB hot stamping quenched steel sheet was systematically studied by power frequency spot welder.Through a series of technology and test experiments,we have obtained the optimal spot welding technological parameter condition.According to the results,the relations among spot welding technological parameter,welding nugget,mechanical property and fracture mode were discussed.The effects of all the welding parameters such as welding current,welding time and electrode force on the quality of joint can be boiled down to one thing—the diameter of welding nugget.The experimental results showed that welding nugget diameter determines the mechanical property of spot welding joint and the relation between welding nugget diameter and the mechanical property of joint presents a kind of linear mathematic representation.There are two typical fracture models of 22 MnMoB hot stamping quenched steel sheet,i.e.,interfacial fracture and nugget pullout.Other than mild steel or normal high strength steel,in the shearing tensile test,hot stamping quenched steel has a great tendency to fail in interfacial mode due to the effects of high strength matrix structure,welding soft zone and the porosity level of fusion zone. | Feng Yi Ma Mingtu Hua Fu'an Zhang Junping Song Leifeng Jin Qingsheng | 2014 | Engineering Sciences2014，12，5： | 2 |
| 9 | Cytidine Mediated AuAg Nanoclusters as Bright Fluorescent Probe for Tumor Imaging in vivo显示文摘高贵金属聚类,避免大多数缺点是一个新兴的班荧光灯探针普通荧光灯混合物,和他们简单准备并且有好水溶解度,好 biocompatibility 和优秀荧光性质。在这研究,我们探索了 cytidine 的合成调停的金银的 nanoclusters (AuAg NC ) 并且在 vitro 为两个使用了它在 vivo 的细胞的成像和肿瘤察觉。试验性的结果证明同样准备的 AuAg NC 能是被使用一敏感荧光灯为癌症房间 / 织物的探查察觉。特别,在有 488 nm 的波长的相关轻照耀下面,显然明亮的荧光信号能乐意地从接种肿瘤老鼠的焦点地点被检测,是明显的,暗示它的可能的应用程序为在 vivo 肿瘤 bioimaging 有效。 | Leifeng Chen Yuanyuan Zhang Hui Jiang Xuemei Wang Chongyang Liu | 2016 | Chinese Journal of Chemistry2016，34，6： | 2 |
| 10 | The test device for heat friction coefficient of high strength steel显示文摘Using high strength steel and ultra-high strength steel in hot stamping and automobile parts is one of the most important ways of the automobile lightweight,which is the development trend of automobiles currently.In this paper, the development of test device for heat friction coefficient by high strength steel can provide important technical parameters for hot stamping process,making the right selection of equipment types,mold design,technology optimization,and research and development of lubrication medium of press forming.At the same time,the experiments indicate that the instrument has not only accurate test result but also good repeatability. | Sun Zhifu Ma Mingtu Ma Fangwu Guo Yihui Song Leifeng Yao Zaiqi | 2012 | Engineering Sciences2012，10，6： | 1 |
| 11 | Ultra high temperature superfluidity in ultracold atomic Fermi gases with mixed dimensionality显示文摘It has been an important goal to achieve higher or even room temperature superconductivity,since the discovery of high Tc superconductors in 1986,with a typical maximum transition temperature Tc of around 95 K at ambien pressure[1]or up to 164 K for the Hg-based cuprates under high pressure[2].The typical Tc/TF is only around 0.05 or less,where TF denotes the Fermi temperature.There have been a few other families of superconductors,including the iron-based[3],heavy fermion[4]and organic superconductors[5].Their maximum attainable Tc/TF has not been able to exceed that of the cuprates.Other notable superconductors include the recently discovered H2S with a record high Tc=203 K under an enormous high pressure of 90 GPa[6],and the monolayer FeSe/SrTiO3 superconductors with a gap opening temperature up to 100 K[7]. | Leifeng Zhang Jibiao Wang Yi Yu Qijin Chen | 2020 | Science China(Physics,Mechanics & Astronomy)2020，63，2： | 1 |
| 12 | Research on plastic fender development and key technologies显示文摘Automotive lightweight and safety performance come into play as key technologies to promote competiveness, and average applied amount of automotive plastics has become a significant sign for automotive industrial development level of a country.Various performances of a vehicle with plastic automotive fenders are analyzed in the paper.The research is emphasized on sinking-resistance and pedestrian protection performance of the plastic fenders by studying plastics characteristics and simulation analysis.It offers references for engineering design in which both automotive lightweight and safety performance are achieved and well balanced. | Yang Hao Li Li Liu Qiang Yang Anzhi Ma Fangwu Zhao Fuquan Guo Yihui Song Leifeng | 2012 | Engineering Sciences2012，10，6： | 1 |
| 13 | Ten‐year follow‐up after intense chemoimmunotherapy with Rituximab‐HyperCVAD alternating with Rituximab‐high dose methotrexate/cytarabine (R‐MA) and without stem cell transplantation in patients with untreated aggressive mantle cell lymphoma显示文摘 | Jorge E.Romaguera Luis E.Fayad LeiFeng KimberlyHartig PamelaWeaver Maria AlmaRodriguez Fredrick B.Hagemeister BarbaraPro PeterMcLaughlin AnasYounes FelipeSamaniego AndreGoy FernandoCabanillas HagopKantarjian LarryKwak MichaelWang | 2010 | British Journal of Haematology2010，，2： | 1 |
| 14 | Microzone plates with high-aspect ratio fabricated by e-beam and x-ray lithography 显示文摘 | WANG Deqiang CAO Leifeng XIE Changqing | 2006 | Journal of Micro/Nanolithography(S1932-5150)2006，5，1： | 1 |
| 15 | Structural Characteristics of A New Original Bamboo Structure Composite Boards显示文摘 | Chuan He Jiyuan Wang Leifeng Zhao Yu Liu | 2012 | Advanced Materials Research2012，，： | 1 |
| 16 | Self-supported yttria-stabilized zirconia mesocrystals with tunable mesopores prepared by a chemi-thermal process显示文摘Mesoporous mesocrystals are highly desired in catalysis,energy storage,medical and many other applications,but most of synthesis strategies involve the usage of costly chemicals and complicated synthesis routes,which impede the commercialization of such materials.During the sintering of dense ceramics,coarsening is an undesirable phenomenon which causes the growth of the grains as well as the pores hence hinders the densification,however,coarsening is desired in the sintering of porous ceramics to expand the pore sizes while retaining the total pore volume.Here we report a chemi-thermal process,during which nanocrystallite aggregates were synthesized by hydrothermal process and then converted to the product by sintering.Through this strategy,we synthesized mesoporous self-supported mesocrystals of yttria-stabilized zirconia with tunable pore size and the process was then scaled-up to industrial production.The thermal conductivity measurement shows that the mesoporous powder is a good thermal isolator.The monolith pellets can be obtained by SPS sintering under high pressure and the mesoporosity is retained in the monolith pellets.This work features facile and scalable process as well as low cost raw chemicals making it highly desirable in industrial applications. | Leifeng Liu Mirva Eriksson Ji Zou Yuan Zhong Qi Liu Zhi Liu Yu-Lung Chiu Zhijian Shen | 2019 | Journal of Materiomics2019，5，3： | 1 |
| 17 | Single order X ray diffraction with binary sinusoidal transmission grating显示文摘 | Cao Leifeng Farster E Fuhrmann A | 2007 | Appl Phys Lett2007，90，05： | 1 |
| 18 | Acceleration and guiding of fast electrons by a nanobrush target显示文摘 | Zhao Zongqing Cao Lihua Cao Leifeng | 2010 | Physics of Plasmas2010，17，12： | 1 |
| 19 | Underground water source loop heat-pump air-conditioning system applied in a residential building in Beijing显示文摘 | Chao Chen Feng Lingsun Leifeng | | 0，，： | 1 |
| 20 | Single order X-ray diffraction with binary sinusoidal transmission grating显示文摘 | Cao Leifeng Forster E Fuhrmann A | 2007 | Appl Phys Lett2007，90，05： | 1 |
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