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无平面结敏感区硅光二极管

武汉大学学报（自然科学版） 1997年第5期43卷 647-649页

作者：尹长松李晓军谷增云王林武汉大学物理学系

研制了在平面ＰＮ结内无敏感区的硅光探测器，测量了这种新结构器件的光电转换特性，说明在光照下，器件的光电流不为零值．

关键词：光敏二极管面积PN结平面结敏感区硅光二极管

Body-Fitted Momentum Source Method for Predicting Rotor Aerodynamics Characteristics in Hover

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Transactions of Nanjing University of Aeronautics and Astronautics 2019年第4期36卷 641-651页

作者： li Peng KONG xiaojun yin Hang ZHANG Guangjun Shanghai Institute of Mechanical and Electrical Engineering Shanghai 201109P.R.China

To gain high efficiency for the simulation of the aerodynamic characteristics of the rotor in hover,body?fitted momentum source(BFMS)method is *** this method,the actual blade geometry is represented by the single layer of volume grid surrounding the *** at correctly simulating the aerodynamic characteristics of the discrete cells along the chordwise of blade airfoil section,a new distributed force model is *** comparison,the RANS method with S?A turbulence model and the steady rotor momentum source(SRMS)method based on embedded grid systems are established,*** the grid connecting methodology is improved to embed the blade into the background grids for the three ***,simulations are performed for the hovering Caradonna?Tung rotor by these methods,and the calculated results are compared with the available experimental ***,the pressure distributions along the blade are compared with the conventional momentum source *** is demonstrated that the BFMS method can be employed as an effective approach to predict rotor aerodynamic characteristics with a low computational resource and reasonable accuracy.

关键词： rotor momentum source body⁃fitted CFD embedded grid system

A novel method for preparing and characterizing graphene nanoplatelets/aluminum nanocomposites

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Nano Research 2018年第3期11卷 1642-1650页

作者： Duosheng li yin Ye xiaojun liao Qing H. Qin School of Materials Science and Engineering Nanchang Hangkong University Nanchang 330063 China Research School of Engineering Australian National University Acton ACT2601 Australia

Graphene nanoplatelets/aluminum （GNPs/Al） nanocomposites were fabricated using a novel two-step method. High resolution transmission electron microscope （HRTEM）, Raman, field emission scanning electron microscopy （FESEM）, X-ray diffraction （XRD）, energy dispersive X-ray spectroscopy （EDS）, EDS mapping, and mechanical testing system （MTS） were applied to characterize the microstructure and mechanical properties of the GNPs/Al nanocomposites. The GNPs were homogeneously dispersed in GNPs/Al nanocomposites, and presented a fine interface behavior and microstructure characteristics. A harmful phase, aluminum carbide （Al4C3）, was not observed in significant quantities in the nanocomposite. Compared with pure aluminum, the mechanical properties of the GNPs/Al nanocomposites containing a low volume fraction of GNPs were sharply improved. When 0.5 vol.%, 1.0 vol.%, and 2.0 vol.% GNPs were added to the aluminum matrix, the average compressive strength of GNPs/A1 nanocomposites was 297, 345, and 527 MPa, respectively, which remarkably increased the strength over the original aluminum by 330% to 586%.

关键词： graphene nanoplatelets nanocomposites mechanical properties two-step method

Wave interaction for a generalized higher-dimensional Boussinesq equation describing the nonlinear Rossby waves

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Journal of Oceanology and limnology 2024年第5期42卷 1415-1424页

作者： Rong SU Penghao JI xiaojun yin College of Science Inner Mongolia Agricultural UniversityHohhot 010018China

Based on an algebraically Rossby solitary waves evolution model,namely an extended(2+1)-dimensional Boussinesq equation,we firstly introduced a special transformation and utilized the Hirota method,which enable us to obtain multi-complexiton solutions and explore the interaction among the *** wave functions are then employed to infer the influence of background flow on the propagation of Rossby waves,as well as the characteristics of propagation in multi-wave running ***,we generated stereogram drawings and projection figures to visually represent these *** dynamical behavior of these solutions is thoroughly examined through analytical and graphical ***,we investigated the influence of the generalized beta effect and the Coriolis parameter on the evolution of Rossby waves.

关键词： Rossby wave Boussinesq equation Complexiton solution Breather solution

Determination of Steroid Hormone Residues in Fish Tissues Using Gel Permeation Chromatography and Ultra Performance liquid Chromatography-Tandem Mass Spectrometry

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Journal of Ocean University of China 2018年第5期17卷 1171-1177页

作者： li Peipei YAN Zhongyong SUN Xiumei CHEN Si CHEN yin ZHANG xiaojun Marine Fishery Institute of Zhejiang Province Zhoushan 316021China Key Laboratory of Sustainable Utilization of Technology Research for Fishery Resource of Zhejiang Province Zhoushan 316021China Zhejiang Ocean University Zhoushan 316022China

A highly sensitive method was developed for the simultaneous determination of 8 steroid hormones in high-fat fish tissues using ultra high performance liquid chromatography-tandem mass spectrometry(UPLC-MS/MS).The 8 steroid hormones were extracted from the tissues with diethyl *** from other common purification methods,the extract solutions were cleaned by gel permeation chromatography(GPC) using ethyl acetate-cyclohexane solution(1:1,v/v) as the mobile *** separation of target compounds was carried out by a BEH C18 column and a gradient elution consisting of acetonitrile and 0.2% aqueous formic acid(v/v).The compounds were detected under the multiple reaction monitoring(MRM) mode and quantified with external standard *** method was validated with respect to linearity,specificity,accuracy and precision.A linearity with correlation coefficient larger than 0.995 was achieved in the range of 0.5 to 50 ng m L^(-1).The average recoveries at the spiked levels of 1.0,5.0,and 10.0 μg kg^(–1) varied between 81.7% and 90.8%,with the relative standard deviations(n=5) ranged from 3.50% to 10.0%.The limit of quantification(LOQ) for 8 steroid hormones ranged from 0.2 to 1.5 μg kg^(-1).It was concluded that this method can be successfully applied for the determination of 8 steroid hormones in complicated matrices including high-fat fish tissues.

关键词： ultra performance liquid chromatography-tandem mass spectrometry anabolic hormone gel permeation chromatography fish tissue

Beam scan mode analysis and design for geosynchronous SAR

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Science China(Information Sciences) 2017年第6期60卷 72-84页

作者： Wei yin Zegang DING xiaojun LU Yu ZHU Beijing Key Laboratory of Embedded Real-time Information Processing Technology School of Information and Electronics Beijing Institute of Technology Beijing Institute of Spacecraft System Engineering Chinese Academy of Space Technology

The beam velocity of geosynchronous synthetic aperture radar(GEO SAR) varies seriously with the orbital position and the scene position, which leads to a significant variation of the scene length and the azimuth resolution in the stripmap(SM) mode. To obtain uniform scene length and azimuth resolution, beam scan modes can be utilized in GEO SAR, such as the sliding spotlight(SLL) mode and the terrain observation by progressive scans(TOPS) mode. However, the conventional design method of the beam scan mode is based on the straight line model(SLM), which does not consider the effects of the curved satellite track and the spherical earth surface. To solve this problem, a curvature circle model(CCM) is proposed considering the actual satellite-earth relationship. By using the CCM, the beam velocity after the beam scan is derived. The scene length and the azimuth resolution are analyzed. The SLL mode and the TOPS mode are recommended for GEO SAR. After that, a design method of the beam scan mode is proposed based on the CMM. The performance of the proposed method is verified by computer simulations.

关键词： GEO SAR beam scan mode design azimuth resolution scene length

Explanations of the DAMPE high energy electron/positron spectrum in the dark matter annihilation and pulsar scenarios

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Science China(Physics,Mechanics & Astronomy) 2018年第10期61卷 19-29页

作者： BingBing Wang xiaojun Bi SuJie lin PengFei yin Key Laboratory of Particle Astrophysics Institute of High Energy Physics Chinese Academy of Sciences Beijing 100049 China University of Chinese Academy of Sciences Beijing 100049 China

Many studies have shown that either the nearby astrophysical source or dark matter （DM） annihilation/decay can be used to explain the excess of high energy cosmic ray （CR） e^±which is detected by many experiments, such as PAMELA and AMS-02. Recently, the dark matter particle explorer （DAMPE） collaboration has reported its first result of the total CR e^± spectrum from 25 GeV to 4.6TeV with high precision. In this work, we study the DM annihilation and pulsar interpretations of this result. We show that the leptonic DM annihilation channels to r＋＇/＂-, 4p, 4＂/＇, and mixed charged lepton final states can well explain the DAMPE e^± spectrum. We also find that the mixed charged leptons channel would lead to a sharp drop structure at - TeV. However, the ordinary DM explanations have been almost excluded by the constraints from the observations of gamma-ray and CMB, unless some exotic DM models are introduced. In the pulsar scenario, we analyze 21 nearby known pulsars and assume that one of them dominantly contributes to the high energy CR e^± spectrum. Involving the constraint from the Fermi-LAT observation of the e^± anisotropy, we find that two pulsars could explain the DAMPE e^± spectrum. Our results show that it is difficult to discriminate between the DM annihilation and single pulsar explanations of high energy e^± with the current DAMPE result.

关键词： cosmic rays dark matter pulsars

Pressure-stabilized hexagonal perovskite-related isolated tetrahedral anion silicate La_(6)Sr_(3)Si_(6)O_(24)

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Chinese Chemical Letters 2023年第5期34卷 548-552页

作者： Jie Feng Lei Zhao Wenda Zhang Cheng li Congling yin xiaojun Kuang Guangxi Key Laboratory of Optic and Electronic Materials and Devices MOE Key Laboratory of New Processing Technology for Nonferrous Metals and MaterialsCollege of Materials Science and EngineeringGuilin University of TechnologyGuilin 541004China Neutron Scattering Division Oka Ridge National LaboratoryOak Ridge 37831United States Guangxi Key Laboratory of Electrochemical and Magnetochemical Functional Materials College of Chemistry and BioengineeringGuilin University of TechnologyGuilin 541004China

The discovery of new perovskite compounds under high pressure mainly focuses on the ABO_(3)compositions and the compositions highly deviated from ABO_(3)are less *** we demonstrate that the La_(6)Sr_(3)Si_(6)O_(24)silicate composition can be stabilized as a hexagonal perovskite-related structure with isolated tetrahedra anions under high pressure of 6 *** compound adopts 9-layer shifted hexagonal perovskite-like structure with both B-cation and oxygen deficiencies and contains pseudo-cubic(c)(La/Sr)O_(2)layers and hexagonal(h)(La/Sr)O_(3)layers stacked according to(c hh)_(3)*** structure features both B-cation vacancy ordering between the two consecutive hexagonal layers and oxygen vacancy ordering in c-(La/Sr)O_(2)layers,resulting in isolated tetrahedral Si O_(4)anions and ionic conduction *** work demonstrates the practicability of accessing new perovskite-related functional materials from the compositions highly deviated from ABO_(3)under high pressure.

关键词： High pressure Hexagonal perovskite Isolated tetrahedral anion Silicate Ionic conductors

Therapeutic Drug Monitoring of Vancomycin and Voriconazole by liquid Chromatography-Tandem Mass Spectrometric Method

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Chemical Research in Chinese Universities 2017年第3期33卷 339-342页

作者： li Yanyan yin Lei li Yanhua SUN Zhihui ZHAO xiaojun GAO Mingyue WANG Hongliang The First Hospital of Jilin University Changchun 130021 P. R. China School of life Science Jilin University Changchun 130012 R R. China

A reliable liquid chromatography-tandem mass spectrometric（LC-MS/MS） method was developed and va- lidated for the simultaneous determination of vancomycin and voriconazole in human plasma. The analytes and internal standard 10-hydroxycarbazepine were separated at a flow rate of 0.9 mL/min using a Zorbax SB-C18 column （50 min×4.6 mm, 2.7 μm）. Positive ion electrospray ionization was used to detect vancomycin, voriconazole and intrenal standard（IS） 10-hydroxycarbazepine followed by multiple reaction monitoring（MRM） of the transition at m/z 725.5→144.2, 350.3→281.0 and 253.1→208.0, respectively. The total run time for both vancomycin and voriconazole samples was 5 min; 0.30μg/mL was the lower limit of quantification. The precision of intraday and interday was no more than 12.4%. The method was successfully and resoundingly applied in therapeutic drug monitoring of 156 patients treated with vancomycin and voriconazole.

关键词： liquid chromatography-tandem mass spectrometry(LC-MS/MS) Vancomycin Voriconazole Therapeutic drug monitoring