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Elimination of the Coherent Artifact in a Pump-Probe Experiment by Directly Detecting the Background-Free Diffraction Signal

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Chinese Physics Letters 2011年第8期28卷 229-232页

作者： LIU Hui ZHANG Hang SI Jin-hai YAN Li-He CHEN Feng hou Xun Key Laboratory for Physical Electronics and Devices of the Ministry of Education&Shaanxi Key Lab of Information Photonic Technique School of Electronics&information EngineeringXi'an Jiaotong UniversityXi'an 710049

The influence of the coherent artifact in a semiconductor Ga-doped ZnO film on femtosecond pump-probe measurement is *** coherent artifact mixed into the pump-probe signal can be directly inspected by detecting the background-free first-order diffraction signal induced by the interference between the pump and probe *** results show that by varying the polarization angle or adjusting the relative intensity between the pump and probe pulses,the coherent artifact can be eliminated from the pump-probe measurement.

关键词： measurement coherent Probe

Flexible, transparent nanocellulose paper-based perovskite solar cells

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npj Flexible Electronics 2019年第1期3卷 42-49页

作者： Lei Gao Lingfeng Chao Meihui hou Jin Liang Yonghua Chen hai-Dong Yu Wei Huang Institute of Advanced Materials(IAM)&Key Laboratory of Flexible Electronics(KLOFE) Jiangsu National Synergetic Innovation Center for Advanced Materials(SICAM)Nanjing Tech University(NanjingTech)30 South Puzhu Road211816 NanjingChina Shanxi Institute of Flexible Electronics(SIFE) Northwestern Polytechnical University127 West Youyi Road710072 Xi’anChina

Recently perovskite solar cells(PSCs),as photoelectric conversion devices,exhibit excellent power conversion efficiency(PCE)and low-processing cost,and have become one of the most promising devices to replace conventional silicon-based solar cells and address current pressing energy *** them,the flexible PSCs are especially more widely applicable and may propel the rapid advancements of wearable electronics,causing a significant paradigm shift in consumer *** flexible PSCs use non-biodegradable petroleum-based polymer substrates,discarding of which will aggravate“white pollution”.Therefore,development of green,biodegradable and low-cost flexible substrates will provide a great alternative to flexible *** we have developed transparent nanocellulose paper(NCP)with coating of acrylic resin as substrates to fabricate flexible PSCs,which are biodegradable and easily *** PCE of these NCP-based PSCs reached 4.25%,while the power per weight(the ratio of power to device weight)was as high as 0.56 W g^(–1).The flexible PSCs also showed good stability,retaining>80%of original efficiency after 50 times of *** NCP-based substrates can also be applied to other electronic systems,which may prosper next-generation green flexible electronics.

关键词： transparent perovskite retaining

Reversed rotation of limit cycle oscillation and dynamics of low-intermediate-high confinement transition

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Chinese Physics B 2018年第6期27卷 292-297页

作者： Dan-Dan Cao Feng Wan Ya-Juan hou hai-Bo Sang Bai-Song Xie College of Nuclear Science and Technology Beijing Normal UniversityBeijing 100875China Beijing Radiation Center Beijing 100875China

The dynamics of the confinement transition from L mode to H mode（LH） is investigated in detail theoretically via the extended three-wave coupling model describing the interaction of turbulence and zonal flow（ZF） for the first ***, turbulence is divided into a positive-frequency（PF） wave and a negative-frequency（NF） one, and the gradient of pressure is added as the auxiliary energy for the system. The LH confinement transition is observed for a sufficiently high input energy. Moreover, it is found that the rotation direction of the limit cycle oscillation（LCO） of PF wave and pressure gradient is reversed during the transition. The mechanism is illustrated by exploring the wave phases. The results presented here provide a new insight into the analysis of the LH transition, which is helpful for the experiments on the fusion devices.

关键词： limit cycle oscillation three-wave interaction confinement transition turbulence

Fabrication, Crosslinking and in vitro Biocompatibility of a Novel Degradable Nano-structure Urethral Tubular Scaffold

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Chemical Research in Chinese Universities 2012年第5期28卷 912-915页

作者： WANG Xiao-qing CHEN Qi-hui hou Yu-chuan LU Zhi-hua HU Jing-hai ZHANG hai-feng HAO Yuan-yuan ZHANG Long GAO Zhan-tuan WANG Chun-xi Department of Urology the First Hospital of Jilin UniversityChangchun 130021P.R.China State Key Laboratory of Polymer Physics and Chemistry Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun 130022P.R.China

A degradable poly（lactic-co-glycolic acid, LA：GA=80：20）（PLGA） urethral tubular scaffold was fabricated by electrospinning. In order to enhance the mechanical properties, the scaffold was crosslinked with glutaraldehyde. The structure and properties of the crosslinked scaffolds were investigated by the mechanical property testing, scanning electron microscopy（SEM）, degradability test in vitro and 3-（4,5）-dimethylthiahiazo（-z-yl）-3,5-diphenytetrazo- liumromide（MTT）. The results show that the scaffold has the nano-structure. The pore size and the porosity are suitable for cell seeding, growth and extracellular matrix production. Although influenced by the crosslinking slightly, the pore size and the porosity could still support cell proliferation and tissuse formation. The mechanical properties are remarkably increased by the crosslinking of glutaraldehyde, and it could meet the demands of a urethral stent. The scaffold could completely collapse within 70 d. The results of the biocompatibility test show that the PLGA scaffold had no cytotoxicity.

关键词： Poly(lactic-co-glycolic acid) Urethral scaffold Degradable Electrospin Crosslinking

Microstructure, Mechanical Properties, and Corrosion Behavior of MoNbFeCrV, MoNbFeCrTi, and MoNbFeVTi High-Entropy Alloys

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Acta Metallurgica Sinica(English Letters) 2019年第9期32卷 1053-1064页

作者： Chao Xiang Zhi-Ming Zhang Hua-Meng Fu En-hou Han Jian-Qiu Wang hai-Feng Zhang Guo-Dong Hu Key Laboratory for Anisotropy and Texture of Materials(Ministry of Education) School of Materials Science and EngineeringNortheastern UniversityShenyang 110819China CAS Key Laboratory of Nuclear Materials and Safety Assessment Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China Shenyang National Laboratory for Materials Science Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China School of Materials Science and Engineering University of Science and Technology of ChinaShenyang 110016China

The development of high-entropy alloys(HEAs)has stimulated an ever-increasing interest from both academia and *** this work,three novel MoNbFeCrV,MoNbFeCrTi,and MoNbFeVTi HEAs containing low thermal neutron absorption cross section elements were prepared by vacuum arc *** microstructure,mechanical properties,and corrosion behaviors were investigated.A dominant body-centered cubic(BCC)phase was present in all these three *** addition,an ordered Laves phase was found to be another major phase in both MoNbFeCrV and MoNbFeCrTi alloys,whereas an ordered BCC(B2)phase was observed in the MoNbFeVTi *** phase formation in these three alloys was *** is found that the formation of the secondary phase in these alloys is mainly ascribed to the large atomic size difference and electronegativity *** the three HEAs show high hardness,high yield strength but limited ***,the MoNbFeCrV,MoNbFeCrTi and MoNbFeVTi alloys exhibit excellent corrosion resistance in both deaerated 1mol/L NaCl and 0.5 mol/L H2SO4 solutions at room ***,further composition adjustment and/or thermomechanical processing is required to enhance the mechanical properties of the three alloys.

关键词： High-entropy alloy Crystal structure Microstructure CALPHAD Mechanical property Corrosion

Kernel crack characteristics for X-ray computed microtomography(μCT)and their relationship with the breakage rate of maize varieties

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Journal of Integrative Agriculture 2020年第11期19卷 2680-2689页

作者： DONG Peng-fei XIE Rui-zhi WANG Ke-ru MING Bo hou Peng hou Jun-feng XUE Jun LI Chao-hai LI Shao-kun Key Laboratory of Oasis Eco-Agriculture Xinjiang Production and Construction Corps/College of AgronomyShihezi UniversityShihezi 832000P.R.China Institute of Crop Sciences Chinese Academy of Agricultural Sciences/Key Laboratory of Crop Physiology and EcologyMinistry of Agriculture and Rural AffairsBeijing 100081P.R.China College of Agronomy Henan Agricultural UniversityZhengzhou 450046P.R.China

The most significant problem of maize grain mechanical harvesting quality in China at present is the high grain breakage rate(BR).BR is often the key characteristic that is measured to select hybrids desirable for mechanical grain ***,conventional BR evaluation and measurement methods have challenges and *** crack parameters evaluation of maize kernel is of great importance to *** this connection,X-ray computed microtomography(μ-CT)has proven to be a quite useful method for the assessment of microstructure,as it provides important microstructural parameters,such as object volume,surface,surface/volume ratio,number of closed pores,and others.X-ray computed microtomography is a non-destructive technique that enables the reuse of samples already measured and also yields bidimensional(2D)cross-sectional images of the sample as well as volume *** this paper,six different maize hybrid genotypes are used as materials,and the BR of the maize kernels of each variety is tested in the field mechanical grain harvesting,and the BR is used as an index for evaluating the breakage resistance of the *** crack characteristic parameters of kernel were detected by X-ray micro-computed tomography,and the relationship between the BR and the kernel crack characteristics was analyzed by stepwise regression *** a relationship between crack characteristic parameters and BR of maize is vital for judging breakage *** results of stepwise multiple linear regression(MLR)showed that the crack characteristics of the object surface,number of closed pores,surface of closed pores,and closed porosity percent were significantly correlated to the BR of field mechanical grain harvesting,with the standard partial regression coefficients of–0.998,–0.988,–0.999,and–0.998,*** R2 of this model was *** validation showed that the Stepwise MLR Model could well predict the BR of maize based on these fou

关键词： breakage rate kernel crack maize microstructure X-ray computed microtomography

Application of Optical Kerr Gate with SrTiO3 Crystal in Acquisition of Gated Spectra from a Supercontinuum

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Chinese Physics Letters 2012年第7期29卷 118-121页

作者： YAN Li-He JIA Sen SI Jin-hai MATSUO Shigeki CHEN Feng hou Xun Key Laboratory for Physical Electronics and Devices of the Ministry of Education&Shaanxi Key Lab of Information Photonic Technique School of Electronics&Information EngineeringXi’an Jiaotong UniversityXi’an 710049 Department of Ecosystem Engineering The University of Tokushima2-1 MinamijosanjimachoTokushima 770-8506Japan

We investigate the optical Kerr effect of SrTiO3 (STO) crystal,of which the nonlinear response time was measured to be less than 200fs,while the nonlinear refractive index is estimated to be 2.16 × 10^(-15)cm^(2)/*** theoptical Kerr gate (OKG) technique with an STO crystal as the Kerr medium,we obtain narrow-bandwidth and symmetric gated spectra from a supercontinuum generated in distilled water by a femtosecond *** experimental results show superiority compared with the gated spectra obtained using OKG with CS2 as the Kerr medium,demonstrating that STO crystal is a promising OKG medium.

关键词： crystal SrTiO3 continuum

Source and accumulation process of Jurassic biodegraded oil in the Eastern Junggar Basin,NW China

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Petroleum Science 2021年第4期18卷 1033-1046页

作者： Mao-Guo hou Ming Zha Xiu-Jian Ding He Yin Bao-Li Bian hai-Lei Liu Zhong-Fa Jiang School of Geosciences China University of PetroleumQingdaoShandong 266580China Research Institute of Exploration and Development Xinjiang Petroleum Administration BureauKaramay 834000China

Biodegradation usually obscures or even radically alters the original characteristics of oil *** mixing of oil from multiple sources makes each source difficult to *** the source of biodegraded oil from multiple sources has always been a hard nut to *** to this challenge,in this study-we carried out a comprehensive investigation of biodegradation impacts,oil-source correlation,and oil charging history to trace the source and reveal the mixing process of biodegraded oil in the Toutunhe Formation(J_(2)t)in the eastern Junggar Basin,NW *** oil of this area was biodegraded to different extent,consequently,many commonly used biomarker parameters(***/Ph,Pr/n C_(17))became less powerful for oil-source *** address this problem,the resistance of many biomarkers to biodegradation was analyzed,and those of high bio resistance were selected to generate a more reliable oil-source *** results revealed that biodegraded oil was a mixture of oil sourced from Lucaogou Formation(P_(2)l)and Xiaoquangou Formation(T_(2-3)xq).Core sample observation,microscopic fluorescent analysis and fluid inclusion analysis were combined to analyze comprehensively oil charging *** analysis of accumulation process exhibited that the existing oil in J_(2)t was a mixture originated from the P_(2)l and T_(2-3)xq source rocks in two separate charging stages when it underwent a complicated process of charging,biodegradation,recharging and mixing.

关键词： Biodegraded oil Mixed oil Oil-source correlation Oil accumulation process Junggar Basin

Quantitative design of yield components to simulate yield formation for maize in China

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Journal of Integrative Agriculture 2020年第3期19卷 668-679页

作者： hou hai-peng MA Wei Mehmood Ali NOOR TANG Li-yuan LI Cong-feng DING Zai-song ZHAO Ming Institute of Crop Sciences Chinese Academy of Agricultural Sciences/Key Laboratory of Crop Physiology and EcologyMinistry of Agriculture and Rural AffairsBeijing 100081P.R.China Institute of Cotton Hebei Academy of Agriculture and Forestry SciencesShijiazhuang 050051P.R.China

Maize(Zea mays L.) stands prominently as one of the major cereal crops in China as well as in the rest of the ***,predicting the growth and yield of maize for large areas through yield components under high-yielding environments will help in understanding the process of yield formation and yield potential under different environmental *** accurate early assessment of yield requires accuracy in the formation process of yield components as *** order to formulate the quantitative design for high yields of maize in China,yield performance parameters of quantitative design for high grain yields were evaluated in this study,by utilizing the yield performance equation with normalization of planting *** density was evaluated by parameters including the maximum leaf area index and the maximum leaf area per *** showed that the variation of the maximum leaf area per plant with varying plant density conformed to the Reciprocal Model,which proved to have excellent prediction with root mean square error(RMSE) value of 5.95%.Yield model estimation depicted that the best optimal maximum leaf area per plant was 0.63 times the potential maximum leaf area per plant of *** performance parameters for different yield levels were quantitatively designed based on the yield performance *** validation of the yield performance model by simulating high yields of spring maize in the Inner Mongolia Autonomous Region and Jilin Province,China,and summer maize in Shandong Province,the yield performance equation showed excellent prediction with the satisfactory mean RMSE value(7.72%) of all the *** present study provides theoretical support for the formulation of quantitative design for sustainable high yield of maize in China,through consideration of planting density normalization in the yield prediction process,providing there is no water and nutrient limitation.

关键词： maize yield performance parameters high yield yield prediction process quantitative design