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| 1 | Phenotypic and genetic variation between two populations of the Chinese yellow pond turtle, Mauremys mutica (Cantor, 1842)显示文摘Mauremys mutica(Cantor,1842)is an endangered species in China.Main phenotypic variations inbody color,body weight,body shape,clutch size,egg size,and hatchling size were revealed betweenthe southern and northern populations.Both populations have the phenomenon of'larger male'sexualsize dimorphism(SSD),especially in the southern population.Furthermore,genetic variations betweenthe two populations were analyzed by RAPD band patterns of 30 random individuals in each population.The average genetic distance was 0.299±0.108 among the samples of two populations.The average ge-netic distance between southern and northern populations was 0.305±0.046.Cluster analysis indicatedthat all the individuals from the southern and northern populations were clustered among themselves toform two distinct clades.A total of 20 population-specific RAPD fragments were scored from 16 primers,and could be used as RAPD markers for distinguishing the southern and the northern population.Basedon the nucleotide sequences of two RAPD markers,two pairs of SCAR primers(SC1-S and SC2-S)weredesigned,which could be used as SCAR markers for the southern population.According to the significantphenotypic and genetic variations,we suggested that the northern population and southern populationmight be considered as two separate taxa,the'northern taxon'and the'southern taxon',and the con-servation should be respectively conducted on the two taxa. | 朱新平 Zhou Li Chen Yongle Du Hejun Gui Jianfang | 2008 | High Technology Letters2008，14，1： | 10 |
| 2 | A ZnO thin-film driven microcantilever for nanoscale actuation and sensing显示文摘Zinc oxide(ZnO)thin film as a piezoelectric material for microelectromechanical system(MEMS)actuators and sensors was evaluated.ZnO thin films were deposited using radio frequency(RF)magnetron sputtering.Process parameters such as gas ratio,working pressure,and RF power were optimized for crystalline structure.The ZnO thin films were characterized by X-ray diffraction(XRD)and scanning electron microscopy(SEM).Good quality of ZnO thin films was further confirmed by a high transverse piezoelectric coefficient d31.A microcantilever was then designed,fabricated,and characterized.Design formulas of resonant frequency,actuation,and sensing sensitivities were derived.The resonant frequency was determined by an impedance analyzer.Tip deflection on nanometer level was demonstrated with the cantilever used as an actuator.The actuation sensitivity was found to be 12.2 nm/V.As a sensor,the cantilever was calibrated against a reference accelerometer.The sensing sensitivity was characterized to be 46 mV/g.The characterization results were compared with design specifications.The differences were caused mainly by thickness control in etching.This study showed that ZnO is a promising piezoelectric material for MEMS actuators and sensors in terms of excellent process compatibility and good piezoelectric performance. | Yanhui Yuan Kun Shyong Chow Hejun Du Peihong Wang Mingsheng Zhang Shengkai Yu k Bo Liu | 2013 | International Journal of Smart and Nano Materials2013，4，2： | 2 |
| 3 | Microstructure and ablation properties of zirconium carbide doped carbon/carbon composites显示文摘 | Shen Xuetao Li Kezhi Li Hejun Du Hongying Cao Weifeng Lan Fengtao | 2009 | Carbon2009，，2： | 2 |
| 4 | SiC whisker toughened Al2O3-(Ti,W)C ceramic matrix composites显示文摘 | FU Yongqing GU Y W DU Hejun | 2001 | Scripta Mater2001，44，： | 1 |
| 5 | Fabrication and characterization of piezoelectric cantilever for micro transducers显示文摘 | Jin Xie Min Hu Shih-Fu Ling Hejun Du | 2005 | Sensors & Actuators: A Physical2005，，1： | 1 |
| 6 | From diamond to crystalline silicon carbonitride:effect of introduction of nitrogen in CH4/H2 gas mixture using MW-PECVD 显示文摘 | Fu Yongqing Sun Chang Q Du Hejun | 2002 | Surface and Coatings Technology2002，165，： | 1 |
| 7 | A silicon-on-insulator based micro check valve显示文摘 | Du Hejun Ling Shih Fu | 2004 | J Micromech Microeng2004，14，： | 1 |
| 8 | Toughness measurement of thin films: a critical review显示文摘 | Sam Zhang Deen Sun Yongqing Fu Hejun Du | 2004 | Surface & Coatings Technology2004，，1： | 1 |
| 9 | Toughness measurement of thin films: a critical review显示文摘 | Sam Zhang Deen Sun Yongqing Fu Hejun Du | 2004 | Surface & Coatings Technology2004，，1： | 1 |
| 10 | Toughening of hard nanostructural thin films: a critical review显示文摘 | Sam Zhang Deen Sun Yongqing Fu Hejun Du | 2004 | Surface & Coatings Technology2004，，1： | 1 |
| 11 | Thin Solid Films显示文摘 | Yongqing Fu Hejun Du Chang Q Sun | 2003 | 424:1072003，424，： | 1 |
| 12 | Crystalline carbonitride forms harder than the hexagona Si-carbonitride crystallite显示文摘 | Chang Q Sun Hejun Du | 2001 | J Phys D: Appl Phys2001，34，： | 1 |
| 13 | Deposition of TiN layer on TiNi thin films to improve surface properties显示文摘 | Yongqing Fu Hejun Du Sam Zhang | 2002 | Surface & Coatings Technology2002，，2： | 1 |
| 14 | Sun, Interracial structure,residual stress and adhesion 显示文摘 | Yongqing Fu Hejun Du Chang Q | 2003 | Thin Solid Films2003，424，： | 1 |
| 15 | From diamond to crystalline silicon carbonitride: effect of introduction of nitrogen in CH4/H2 gas mixture using MW-PECVD 显示文摘 | Fu Yongqing Sun Chang Q Du Hejun | 2002 | Surface and Coating Technology2002，165，： | 1 |
| 16 | Enhanced photoelectrochemical water-splitting effect with a bent ZnO nanorod photoanode decorated with Ag nanoparticles显示文摘 | Yuefan Wei Lin Ke Junhua Kong Hong Liu Zhihui Jiao Xuehong Lu Hejun Du Xiao Wei Sun | 2012 | Nanotechnology2012，，23： | 1 |
| 17 | TiNi-based thin films in MEMS applications: a review显示文摘 | Fu Yongqing Du Hejun Huang Weimin | 2004 | Sensors and Actuators2004，112，： | 1 |
| 18 | Deposition and characterization of Ti1-x (Ni,Cu)x shape memory alloy thin films显示文摘 | DU Hejun FU Yongqing | 2004 | Suface and CoatingsTechnology2004，176，： | 1 |
| 19 | Influence of thermal treatment on electronic properties of inkjet-printed zinc oxide semiconductor显示文摘Additive manufacturing of electronic devices using inkjet printing provides a potential alternative approach in substitution for con-ventional electronic fabrication processes.However,the complex nature of inkjet printing involves the liquid deposition and film formation from the vaporization of solvent,which makes it different from film created by conventional deposition methods.Inkjet print-ing of zinc oxide(ZnO),which is a widely utilized semiconductor,produces polycrystalline film composed of nano-size grains,which could significantly influence the properties of printed film.In this study,low-temperature annealing was employed to treat inkjetprinted ZnO for UV photodetection application,and its influence on electrical properties was studied.Band bending was character-ized using the Mott-Schottky plot which examines the charge dis-tribution of the films.It is found that the annealing of inkjet-printed polycrystalline ZnO film has improved its electrical properties,which could be attributed to the reduction of band bending due to the merging of grains.The treatment also helps to reduce impurities of the film,such as zinc hydroxide complexes,which is common for solution-derived films.Hence,the study could pay the way for the improvement of electrical properties of inkjet-printed functional materials. | Van-Thai Tran Yuefan Wei Hejun Du | 2022 | International Journal of Smart and Nano Materials2022，13，2： | 0 |
| 20 | Investigation of HDD Ramp Unloading Processes with an Efficient Scheme显示文摘Ramp load/unload(L/UL)mechanisms are widely used to rest sliders in hard disk drives(HDDs).Loading/unloading a slider swiftly and smoothly is crucial in a HDD design.A novel,efficient simulation scheme is proposed to investigate the behaviors of a head disk interface(HDI)in ramp unloading processes.A dual scale model is enabled by decoupling the nano-meter scale change of an air bearing and the micro-or milli-meter scale deformation of a suspension.A modified Reynolds equation governing the air bearing was solved numerically.The slider design was characterized with performance functions.Three stages in an unloading process were analyzed with a lumped parameter suspension model.Key parameters for the model were estimated with a comprehensive finite element suspension model.Finally,simulation results are presented for a commercial HDI design. | Yan Liu Hejun Du | 2011 | Advances in Applied Mathematics and Mechanics2011，3，6： | 0 |
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