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Local Functional Limit Theorems of Increments for Brownian Motion

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Acta Mathematica Sinica,English Series 2018年第7期34卷 1074-1086页

作者： Fu Qing GAO yong hong LIU School of Mathematics and Statistics Wuhan University Wuhan 430072 P. R. China Guangxi Colleges and Universities Key Laboratory of Data Analysis and Computation School of Mathematics and Computing Science Guilin University of Electronic Technology Guilin 541004 P. R. China

In this paper, we present a local Csorgo- Revesz type functional limit theorem for increments of Brownian motion and give its convergence rate. The results also extend the functional forms of Levy＇s modulus of contin... 详细信息

关键词： Keywords Brownian motion increment local functional limit rate of convergence large deviation small deviation

Video learning based image classification method for object recognition

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Journal of Central South University 2013年第9期20卷 2399-2406页

作者： LEE hong-ro SHIN yong-ju Department of NTIS Center Korea Institute of Science & Technology Information

Automatic image classification is the first step toward semantic understanding of an object in the computer vision *** key challenge of problem for accurate object recognition is the ability to extract the robust features from various viewpoint images and rapidly calculate similarity between features in the image database or video *** order to solve these problems,an effective and rapid image classification method was presented for the object recognition based on the video learning *** optical-flow and RANSAC algorithm were used to acquire scene images from each video *** the selection of scene images,the local maximum points on comer of object around local area were found using the Harris comer detection algorithm and the several attributes from local block around each feature point were calculated by using scale invariant feature transform （SIFT） for extracting local ***,the extracted local descriptor was learned to the three-dimensional pyramid match *** results show that our method can extract features in various multi-viewpoint images from query video and calculate a similarity between a query image and images in the database.

关键词： image classification multi-viewpoint image feature extraction video learning

Noncommutative Versions of the Singer-Wermer Conjecture with Linear Left θ-derivations

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Acta Mathematica Sinica,English Series 2008年第11期24卷 1891-1900页

作者： yong Soo JUNG Kyoo hong PARK Department of Mathematics Sun Moon University Asan Chungnam 336-708 Korea Department of Mathematics Education Seowon University Cheongju Chungbuk 361-742 Korea

The noncommutative Singer-Wermer conjecture states that every linear （possibly unbounded） derivation on a （possibly noncommutative） Banach algebra maps into its Jacobson radical. This conjecture is still an open q... 详细信息

关键词： linear left θ-derivation linear θ-derivation Jacobson radical nil radical

SPH Modelling of the Vortex-Induced Vibration of A Near-Wall Cylinder

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China Ocean Engineering 2023年第3期37卷 355-368页

作者： WEN hong-jie ZHAO Yu-meng ZHU gan-cheng ZHU Liang-sheng REN Bing School of Civil Engineering and Transportation South China University of TechnologyGuangzhou 510641China China State Construction Engineering Corporation Limited Beijing 100029China Institute of Ocean Engineering Ningbo UniversityNingbo 315211China State Key Laboratory of Coastal and Offshore Engineering Dalian University of TechnologyDalian 116024China

The frequency-locked phenomenon commonly occurs in the vortex-induced vibration(VIV)of bluff *** simulation of this lock-in behavior is challenging,especially when the structure is positioned in close proximity to a solid *** establish a robust simulator,an enhanced smoothed particle hydrodynamic(SPH)model is *** SPH model incorporates a particle shifting algorithm and a pressure correction algorithm to prevent cavity formation in the structure's wake area.A damping zone is also established near the outlet boundary to dissipate the vortices that shed from the ***,GPU parallel technology is implemented to enhance the SPH model's computational *** validate the mo del,the predicted results are compared with the available refere nce data for flow past both stationary and oscillating *** verified SPH model is then employed to comparatively investigate the motion re sponse,lift characteristic,and vortex shedding mode of cylinders with and without accounting for the effect of boundary *** analyses demonstrate that the developed SPH model is a proficient tool for efficiently simulating the vibration of near-wall bluff bodies at low Reynolds number.

关键词： SPH model VIV near-wall cylinder Reynolds number GPU

Composite solitons in SU(3) spin–orbit-coupling Bose gases

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Communications in Theoretical Physics 2020年第2期72卷 88-92页

作者： hong-Xia Yue yong-Kai Liu College of Physics and Information Engineering Shanxi Normal UniversityLinfen 041000China

We study solitons in a spin-1 Bose–Einstein condensates with SU(3)spin–orbit *** obtain the ground state and the metastable solution for solitons with attractive interactions by the imaginary-time evolution *** with the SU(2)spin–orbit coupling,it is found that the solitons in SU(3)spin–orbit coupling show a new feature due to breaking the *** solitons called the composite solitons have mixing manifolds of ferromagnetic and antiferromagnetic *** has stimulated people to study the topological excitation properties of SU(3)spin–orbit coupling and it is expected to find new quantum phases.

关键词： composite solitons Bose–Einstein condensates SU(3)spin–orbit-coupling

Super-Resolution Imaging by using a Metallic Rod Array in the Near Infrared Region

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Chinese Physics Letters 2012年第4期29卷 210-212页

作者： YAO Jie YE yong-hong College of Physics Science and Technology Nanjing Normal UniversityNanjing 210046

An array of metallic rods can transport details below the diffraction limit of an object from the front face to the back *** super-resolution imaging system has been studied in the microwave,mid-infrared and optical *** investigate its performance in the near infrared (1550nm) *** simulations show that the near-field components of dipole sources are transferred by the excitation and propagation of the surface plasmon mode of the *** appropriate length of rods is determined by the excited surface plasmon *** spatial resolution is greatly affected by the loss of metal.

关键词： resolution Infrared details

Highly Transparent and Colorless Polyimide Film with Low Dielectric Constant by Introducing Meta-substituted Structure and Trifluoromethyl Groups

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Chinese Journal of Polymer Science 2021年第4期39卷 455-464,I0006页

作者： hong-Tao Zuo Feng gan Jie Dong Peng Zhang Xin Zhao Qing-Hua Zhang State Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of Materials Science and EngineeringDonghua UniversityShanghai 201620China Institute of High Energy Physics Chinese Academy of SciencesBeijing 100049China

An effective design strategy for preparing highly transparent polyimide film with low dielectric constant is *** key to the strategy is to simultaneously introduce meta-substituted structure and trifluoromethyl in polymer *** using this design strategy,a highly transparent polyimide film with low-k was synthesized from 3,5-diaminobenzotrifluoride(m-TFPDA)and 4,4'-(hexafluoroisopropylidene)diphthalic anhydride(6FDA)through a two-step *** obtained m-TFPDA/6FDA(CPI)film(~30 pm)possesses high optical transparency(λ_(cutoff)=334 nm,T_(450nm)=85.26%,Haze=0.31)and is close to colorless(L^(*)=96.03,a^(*)=-0.34,b^(*)=2.12,yellow index=3.96).The intrinsic k and dielectric loss value of the film are 2.27 and 0.0013 at 10 kHz,*** importantly,such low dielectric performance could remain stable up to 280℃,and the film shows a low moisture rate(~0.51%),which helps to maintain the low-k property stability in different humid ***,the film also shows good thermal stability and mechanical properties,with a glass transition temperature(T_(g))of 296℃and the 5 wt%decomposition temperature(T_(d,s%))of 522℃under N_(2).The tensile strength and tensile modulus of the film are 85.1 MPa and 1.96 GPa,*** addition,the film is soluble in common solvents,which allows simple solution processing and low-cost,continuous roll-to-roll *** design strategy is beneficial to improving the transparency,lightening yellow color,lowering the dielectric constant and meanwhile maintaining the comprehensive properties of polyimide films,which is mainly due to the introduced meta-substituted and trifluoromethyl structures effectively inhibiting the transfer of charge transfer complex(CTC)effects and increasing the free volume of *** design strategy could also be extended to other high-performance polymer systems.

关键词： Polyimide film Transparent Colorless Low dielectric constant

Inhibition of hematite on acid mine drainage caused by chalcopyrite biodissolution

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Chinese Journal of Chemical Engineering 2022年第4期35卷 94-104页

作者： Baojun Yang Wen Luo Maoxin hong Jun Wang Xueduan Liu Min gan Guanzhou Qiu School of Minerals Processing and Bioengineering Central South UniversityChangsha 410083China Key Laboratory of Biohydrometallurgy Ministry of EducationCentral South UniversityChangsha 410083China Department of Dermatology The First Hospital of ChangshaChangsha 410005China

Even though biodissolution of chalcopyrite is considered to be one of the key contributors in the formation of acid mine drainage(AMD),there are few studies to control AMD by inhibiting chalcopyrite ***,a novel method of using hematite to inhibit chalcopyrite biodissolution was proposed and *** results indicated that chalcopyrite biodissolution could be significantly inhibited by hematite,which consequently decreased the formation of *** the presence of hematite,the final biodissolution rate of chalcopyrite decreased from 57.9%to 44.4%at 20 *** in turn suggested that the formation of AMD was effectively suppressed under such *** to the biodissolution results,mineral composition and morphology analyses,and electrochemical analysis,it was shown that hematite promoted the formation and accumulation of passivation substances(jarosite and Cu2-xS)on chalcopyrite surface,thus inhibiting the biodissolution of chalcopyrite and limiting the formation of AMD.

关键词： Chalcopyrite Hematite Biodissolution Acid mine drainage Acidithiobacillus ferrooxidans

Charged Higgs Boson Pair Production via Gluon-Gluon Collisions in MSSM with CP Violation

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Communications in Theoretical Physics 2001年第7期36卷 61-64页

作者： JIANG Yi MA Wen-gan HAN Liang HOU hong-Sheng CCAST(World Laboratory) P.O.Box 8730Beijing 100080China Modern Physics Department University of Science and Technology of ChinaHefei 230027China

The CP-violating effects to the subprocess gg→H+H-are studied in the mSUGRA scenario at the CERN large hadron collider,by taking into account the experimental bounds of electron and neutron electric dipole *** CP-violating effects in this process are related to the complex phases ofμand Af in the mSUGRA *** our calculation we consider smallCP phases ofμand Af and neglect the effects of neutral Higgs boson *** this case the CP effects to the process mainly come from the complex couplings of *** find a strong dependence of charged Higgs boson pair production rate on the complex couplings in the parameter space of minimal supersymmetric standard model.

关键词： charged Higgs boson MSSM CP violation