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Nano Research 2022年第2期15卷 1524-1531页

作者： Hyeonwoo Shin Sang-Joon Park Byeong-Cheol kang Tae-jun Ha Department of Electrical Engineering and Computer Science Inter-university Semiconductor Research CenterSeoul National UniversitySeoul 08826Korea Department of Electronic Materials Engineering Kwangwoon UniversitySeoul 01897Korea

Understanding charge transport mechanisms in thin-film transistors based on random networks of single-wall carbon nanotubes(SWCNT-TFTs)is essential for further advances to improve the potential for various nanoelectronic ***,a comprehensive investigation of the two-dimensional(2D)charge transport mechanism in SWCNT-TFTs is reported by analyzing the temperature-dependent electrical characteristics determined from the direct-current and non-quasi-static transient measurements at 80-300 *** elucidate the time-domain charge transport characteristics of the random networks in the SWCNTs,an empirical equation was derived from a theoretical trapping model,and a carrier velocity distribution was determined from the differentiation of the transient ***,charge trapping and de-trapping in shallow-and deep-traps in SWCNT-TFTs were analyzed by investigating charge transport based on their trapping/de-trapping *** comprehensive analysis of this study provides fundamental insights into the 2D charge transport mechanism in TFTs based on random networks of nanomaterial channels.

关键词： single-wall carbon nanotube random networks two-dimensional(2D)charge transport time-domain transient measurements charge trapping/de-trapping shallow-/deep-traps

Review on design, preparation and performance characterization of gelled fuels for advanced propulsion

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Frontiers of Chemical Science and Engineering 2022年第6期16卷 819-837页

作者： kang Xue Jinwen Cao Lun Pan Xiangwen Zhang Ji-jun Zou Key Laboratory for Advanced Fuel and Propellant of Ministry of Education School of Chemical Engineering and TechnologyTianjin UniversityTianjin 300072China Collaborative Innovative Center of Chemical Science and Engineering(Tianjin) Tianjin 300072China

With the increasing demand for high-performance and safe fuels in aerospace propulsion systems,gelled fliels have attracted increasing *** of their unique structure,gelled fuels exhibit the advantages of both solid and liquid fliels,such as high energy density,controllable thrust and storage *** review provides an overview on design,preparation and performance characterization of gelled *** composition,preparation process and gelation mechanism of gelled high-energy-density fuels are *** these aspects,the rheology and flow behavior of gelled fuels is summarized in terms of the shear thinning property,dynamic viscoelasticity and ***,the progress of atomization of gelled fuels is reviewed with a focus on the effect of atomizing *** addition,the experiments and theoretical models of single droplet combustion and combustor combustion are ***,research directions for the development and application of gelled fuels are suggested.

关键词： gelled fuels high-energy-density fuels rheological properties atomization combustion

Optimum conditions and application of one-step fluorescent cyanoacrylate fuming method for fingermark development based on PolyCyano UV

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Forensic Sciences Research 2022年第3期7卷 550-559页

作者： kang Li Shuo Li jun Yang Forensic Science Department Zhejiang Police CollegeHangzhouChina School of Investigation People’s Public Security University of ChinaBeijingChina

Cyanoacrylate fluorescent staining has become a common method for developing latent fingermarks on light-coloured or white *** method requires two steps and skilled operation,and the handling process has the risk of damaging the ridge details or even biological *** take full advantage of the high-sensitivity fluorescence,recent research efforts on fluorescent cyanoacrylate have aimed to avoid rinsing after staining,add fluorescence to the cyanoacrylate,increase the fluorescence intensity and broaden the fluorescence spectral *** UV is a novel product that can be used to overcome the disadvantages associated with progressing to one-step fuming to directly develop *** explore the optimal development conditions and application effects of PolyCyano UV,thermogravimetric differential thermal analysis,fluorescence spectroscopy and control variable analysis are used to determine and analyse the best conditions for using the reagent,including temperature,fluorescence excitation band,relative humidity and fuming *** temperature range of the one-step fuming development method is 212.14℃–275.16℃,the wavelength range of the excitation light source is 235–580 nm,the relative humidity is 60%–80%,the concentration of the fume is 1–3g/m^(3) and the specific value is related to the surface properties of the object and the aged time of the ***,fluorescence spectroscopy shows that the excitation wavelength range of the light source is 235–*** on the best fuming condition,many common objects were selected to proceed to the application experiments,which allowed for a comparison with the traditional visualisation method,namely the Cyanobloom reagent+dyeing two-step development *** comparison showed that latent fingermarks on most non-porous smooth surfaces,especially on light-coloured or white objects,were developed *** addition,a comparative study with the conventional cyanoacrylate glue–f

关键词： Forensic sciences polyCyano UV latent fingermark developing conditions fluorescence technique one-step fuming

Time delay and cross-correlated Gaussian noises-induced stochastic stability and regime shift between steady states for an insect outbreak system

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International Journal of Biomathematics 2019年第4期12卷 301-323页

作者： kang-kang Wang Ya-jun Wang Hui Ye Sheng-Hong Li School of Science Jiangsu University of Science and Technology Zhenjiang 212003 P. R. China Center of Complex Systems and Network Science Research Southeast University Nanjing 210096 P. R. China School of Mathematical Sciences Nanjing Normal University Nanjing 210097 P. R. China

In this paper, we focus on investigating the stochastic stability and the regime transition between the endangered state and the boom state for a time-delayed insect growth system driven by correlated external and internal noises. By use of the Fokker Planck equation, the method of small time delay approximation and the fast descent method, we explore in detail the joint action of noise terms and time delay on the mean reproduction and depression time for the insect population. Our investigations indicate that the pseudo-resonance phenomenon of the mean first-passage time (MFPT) occurs because of the impact of different noises and time delay. Through the numerical calculation, it is discovered that multiplicative noise can speed up the shift of the insect population from the boom state to the endangered one, while the noise correlation and time delay can propel the insect system to evolve from the endangered state to the boom state and improve the biological stability. In addition, the impact of the additive noise on the stability of the biological system depends on the positive and negative situation of the noise correlation. On the other hand, during the process of suppressing the insect explosion, it is beneficial to the pest control to amplify the association noise strength and weaken the intensities of the multiplicative, additive noises and time delay. However, during the process of eliminating the pests, it can produce nice effect on the disinsection to increase time delay, the intensities of multiplicative and additive noises and weaken the strength of noise correlation.

关键词： Insect outbreak model correlated noises time delay mean reproduction time mean depression time

DP-GenFL: a local differentially private federated learning system through generative data

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Science China(Information Sciences) 2023年第8期66卷 275-276页

作者： jun LI kang WEI Chuan MA Feng SHU School of Electronic and Optical Engineering Nanjing University of Science and Technology Zhejiang Lab Key Laboratory of Computer Network and Information Integration (Southeast University) Ministry of Education School of Information and Communication Engineering Hainan University

With the rapid development of the Internet of Things(Io T),the amount of data from intelligent devices is propagating at unprecedented scales. Meanwhile, machine learning(ML),which relies heavily on such data, is revolutionizing many aspects of our lives [1]. However, conventional centralized ML offers little scalability for efficiently processing this huge amount of data.

关键词： Learning systems

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Application of Wenner Configuration to Estimate Soil Water Content in Pine Plantations on Sandy Land

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Pedosphere 2007年第6期17卷 801-812页

作者： ZHU Jiao-jun kang Hong-Zhang Y. GONDA Institute of Applied Ecology Chinese Academy of Sciences Shenyang 110016 （China）. Graduate School Chinese Academy of Sciences Beijing 100039 （China） Shanghai Jiaotong University Shanghai 200240 （China） Faculty of Agriculture Niigata University Niigata 950-2181 （Japan）

To estimate the mean value of surface soil water content rapidly,accurately,and nonintrusively,field investigations on soil electrical resistivity(SER)with the Yokogawa 324400 earth resistivity meter and the surface(0-150 cm)soil water content(SWC)with time domain reflectometry(TDR),together with the abiotic factors including soil texture,structure. and salinity concentrations were conducted in the Mongolian pine(Pinus sylvestris ***)plantations on a sandy *** measurement of SER was based on the 4-probe Wenner configuration *** between the values of SWC and SER were obtained based on analysis of the abiotic factors of the research site,which play a key role in affecting the soil electrical *** indicate that the SER meter could be used to estimate the mean value of SWC in the Mongolian pine plantations on the sandy land during the growing *** bulky nature of the equipment simplified the cumbersome measurements of soil water content with the general *** must be noted that the Wenner configuration method could only provide the mean values of the SWC,and the soil texture,structure, temperature,and solute concentrations influenced the SER and further affected the estimation of the SWC by the SER ***,the results of this study could be applied on a sandy land during the growing seasons ***, the SWC of other soil types also may be obtained according to the individual soil types using the procedures of this study.

关键词： Mongolian pine plantation sandy land soil electrical resistivity soil water content Wenner configuration method

2,3-Dimercaptosuccinic acid self-assembled gold electrode for the simultaneous determination of epinephrine and dopamine

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Chinese Chemical Letters 2009年第2期20卷 221-224页

作者： Wei jun kang Ling Mei Niu Li Ma School of Public Health Hebei Medical University Shijiazhuang 050017 China

Simultaneous determination of epinephrine （EP） and dopamine （DA） at 2,3-dimercaptosuccinic acid （DMSA） modified electrode was studied. The oxidation peaks of the mixture of EP and DA appeared at the same potential, but the cathodic peak currents were only linear to the concentration of DA, whereas the anodic peak currents were equal to the sum of individual anodic peak currents of EP and DA. Therefore, a novel electrochemical method for the simultaneous determination of EP and DA at a DMSA modified electrode （DMSA/Au electrode） by cyclic voltammetry was established. The DMSA self-assembled electrode showed good sensitivity, selectivity and stability and could be used to determine DA and EP, simultaneously, in the real application with satisfactory results.

关键词： 2,3-Dimercaptosuccinic acid Simultaneous determination Dopamine Epinephrine

Shadow Detection and Removal From Photo-Realistic Synthetic Urban Image Using Deep Learning

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Computers, Materials & Continua 2020年第1期62卷 459-472页

作者： Hee-Jin Yoon kang-Jik Kim jun-Chul Chun Department of Computer Science Kyonggi UniversityGyeonggi-do16227Korea

Recently,virtual reality technology that can interact with various data is used for urban design and ***,one of the most important elements in virtual reality technology,means visual expression so that a person can experience three-dimensional space like *** obtain this realism,real-world data are used in the various *** example,in order to increase the realism of 3D modeled building textures real aerial images are utilized in 3D ***,the aerial image captured during the day can be shadowed by the sun and it can cause the distortion or deterioration of *** resolve this problem,researches on detecting and removing shadows have been conducted,but the detecting and removing shadow is still considered as a challenging *** this paper,we propose a novel method for detecting and removing shadows using deep *** this work,we first a build a new dataset of photo-realistic synthetic urban data based on the virtual environment using 3D spatial information provided by *** detecting and removing shadow from the dataset,firstly,the 1-channel shadow mask image is inferred from the 3-channel shadow image through the ***,to generate a shadow-free image,a 3-channel shadow image and a detected 1-channel shadow mask into the GAN is *** the experiments,we can prove that the proposed method outperforms the existing methods in detecting and removing shadow.

关键词： Deep-learning shadow detection shadow removal synthetic data

Dependence of Conductance of Corrugated Graphene Quantum Dot on Geometrical Features

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Communications in Theoretical Physics 2009年第11期52卷 960-964页

作者： LI Gui-Qin DENG Jing-kang CAI jun Department of Physics Tsinghua University Beijing 100084 China

Dependence of conductance of corrugated graphene quantum dot(CGQD)on geometrical features includinglength,width,connection and edge is investigated by the first principles *** results demonstrate that theconductance of CGQD with different geometrical features is different from each *** positions and amplitudesof discrete levels in densities of states and transmission coefficients are sensitive to geometrical *** I-Vcharacteristics of graphene are modified by size and edge,it is surprise the current does not change monotonously butoscillatory with *** they are slight change for different connections.

关键词： corrugated graphene conductance first principles calculations geometrical features

Classical Electromagnetic Field Theory in the Presence of Magnetic Sources

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Chinese Physics Letters 2003年第3期20卷 321-324页

作者： Li kang Chen Wen-jun Carlos M. Naón Department of Physics Hangzhou Teacher's College Hangzhou 310036 Department of Physics Zhejiang University Hangzhou 310027 Instituto de Física La Plata Departamento de Física Facultad de Ciencias Exactas Universidad Nacional de La Plata CC 67 1900 La Plata Argentina

Using two new well-defined four-dimensional potential vectors, we formulate the classical Maxwell field theory in a form which has manifest Lorentz covariance and SO(2) duality symmetry in the presence of magnetic sources. We set up a consistent Lagrangian for the theory. Then from the action principle we obtain both Maxwell's equation and the equation of motion of a dyon moving in the electromagnetic field.

关键词： Maxwell equations