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Communications in Theoretical Physics 2020年第12期72卷 18-24页

作者： chong Yang Xi-Yang Xie Department of Mathematics and Physics North China Electric Power UniversityBaoding 071003China

Dark solitons in the inhomogeneous optical fiber are studied in this manuscript via a higher-order nonlinear Schr?dinger equation,since dark solitons can be applied in waveguide optics as dynamic switches and junctions or optical logic *** on the Lax pair,the binary Darboux transformation is constructed under certain constraints,thus the multi-dark soliton solutions are *** propagation and collision are graphically discussed with the group-velocity dispersion,third-and fourth-order dispersions,which can affect the solitons’velocities but have no effect on the *** collisions between the two dark solitons and among the three dark solitons are displayed,while the elasticity cannot be influenced by the above three coefficients.

关键词： higher-order nonlinear Schrodinger equation inhomogeneous optical fiber binary Darboux transformation dark solitons

Clinical significance of heterotopic gastric mucosal patch of the proximal esophagus

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World Journal of Gastroenterology 2013年第3期19卷 331-338页

作者： Vui Heng chong Endoscopy Unit Department of MedicineRIPAS HospitalBandar Seri Begawan BA 1710Brunei Darussalam

Heterotopic gastric mucosa of the proximal esophagus (HGMPE),also referred to as"inlet patch"or"cervical inlet patch",is a salmon colored patch that is usually located just distal to the upper esophageal sphincter. HGMPE is uncommon with endoscopic studies reporting a prevalence ranging from less than one percent to 18%.Most HGMPE are asymptomatic and are detected incidentally during endoscopy for evaluations of other gastrointestinal *** consider HGMPE as clinically irrelevant *** clinical significance of HGMPE is mainly acid related or neoplastic *** reported prevalence of laryngopharyngeal reflux symptoms varies from less than 20%to as high as 73.1%.However,most of these symptoms are mild. Clinically significant acid related complications such as bleeding,ulcerations,structure and fistulization have been *** rare,dysplastic changes and malignancies in association with HGMPE have also been *** with Barrett's esophagus have also been reported but the findings so far have been *** are still many areas that are unknown or not well understood and these include the natural history of HGMPE,risk factors for complications,role of Helicobacter pylori infection and factors associated with malignant ***-up may need to be considered for patients with complications of HGMPE and surveillance if biopsies show intestinal metaplasia or dysplastic *** the overall low incidence of clinically relevant manifestations reported in the literature,HGMPE is a clinically significant entity but further researches are required to better understand its clinical significance.

关键词： Cervical inlet patch Laryngopharyngeal reflux Globus pharyngeus Neoplasms Barrett’s esophagus

Dissipative preparation of Bell states with parallel quantum Zeno dynamics

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Science China(Physics,Mechanics & Astronomy) 2019年第11期62卷 57-62页

作者： chong Yang DongXiao Li XiaoQiang Shao Center for Quantum Sciences and School of Physics Northeast Normal UniversityChangchun 130024China Center for Advanced Optoelectronic Functional Materials Research and Key Laboratory for UV Light-Emitting Materialsand Technology of Ministry of EducationNortheast Normal UniversityChangchun 130024China

We propose a new mechanism, parallel quantum Zeno dynamics, to dissipatively prepare all Bell entangled states of the twoqubit system in the context of cavity quantum electrodynamics. This mechanism can provide two transition channels between ground states and two different dark states simultaneously, which efficiently speeds up the stabilization of the entanglement and suppresses the adverse influence of surrounding environments. In addition, there is no need for the initialization of quantum states and the Clauser-Horne-Shimony-Holt inequality can be violated in a finite temperature bath. The experimental feasibility is also studied by the state-of-the-art technique and a high fidelity about 99% can be achieved.

关键词： Bell states quantum Zeno dynamics quantum dissipation

Effective I/O Scheme Based on RTP for Multimedia Communication Systems

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Journal of Computer Science & Technology 2006年第6期21卷 989-996页

作者： Nam-Sup Park chong-Sun Hwang Department of Computer Science and Engineering Korea Univcrsity Seoul Korea

The prime standard for audio/video transport in IP networks is the Real-time Transport Protocol （RTP） and it is targeted at useful services for the transport of real-time multimedia data. RTP was originally designed for use in multicast conferences, using the lightweight sessions model. RTP （in particular, the data part） is so tightly coupled to the application that a number of people have developed libraries that implement RTP. However, little is known about the RTP overheads between user area and kernel area within operating systenl. Actually, unnecessary copying between user area and kernel area lowers the system efficiency. In this paper, we present the design and implementation of Enhanced Multimedia Input/Output Scheme based on LINUX. We brought focus to the crossover architecture supporting RTP. Our contributions are able to be summarized into two components： 1） Enhanced Input/Output （EIO） scheme based on LINUX improves the transmission speed by reducing the overheads generated from data copy and context switch between user area and kernel area. And this enables server-based system to transport multimedia data more efficiently. 2） Furthermore, Enhanced Input/Output scheme with RTP （EIORTP） scheme supports efficient multimedia data transmission architecture. The two schemes improve the performance of massive multimedia data transmission.

关键词： kernel area system call EIO RTP EIORTP

Single Minimal Supersymmetric Extension of Standard Model Higgs Production in γγ Collision

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Chinese Physics Letters 1998年第2期15卷 89-91页

作者： ZHU Shou-hua LI chong-sheng GAO chong-shou China Center of Advanced Science and Technology(World Laboratory) P.O.Box 8730Beijing 100080 Department of Physics Peking UniversityBeijing 100871

The cross sections of the single minimal supersymmetric extension of standard model(MSSM)Higgs production inγγcollision based on next linear collider with the e+e-center-of-mass energy 500 GeV have been *** to the cross sections arising from stops mixing are significant and have been *** the MSSM single Higgs production cross sections,which are typically in the range of 0.01 fb to several hundreds of fbs,can be comparable to that of standard model at appropriate parameters values.

关键词： symmetric Higgs mixing

Viral inactivation by irradiation rays

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Light(Science & Applications) 2023年第4期12卷 505-506页

作者： Kai-Kai Liu chong-Xin Shan Henan Key Laboratory of Diamond Optoelectronic Materials and Devices School of Physics and MicroelectronicsZhengzhou UniversityZhengzhouChina

Viral infection can lead to serious illness and death around the world,as exemplified by the spread of *** irradiation rays can inactive virions through ionizing and non-ionizing *** application of light in viral inactivation and the underlying mechanisms are reviewed by the research group of Dayong Jin from University of Technology Sydney.

关键词： effect. inactivation death

A PROCESS FOR SOLVING A FEW EXTREME EIGENPAIRS OF LARGE SPARSE POSITIVE DEFINITE GENERALIZED EIGENVALUE PROBLEM

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Journal of Computational Mathematics 2000年第4期18卷 387-402页

作者： chong-hua Yu O.Axelsson Department of Mathematics Fudan UniversityShanghai 200433China Faculty of Mathematics and Informatics University of Nijmegen6525 ED NijmegenThe Netherlands

In this paper, an algorithm for computing some of the largest (smallest) generalized eigenvalues with corresponding eigenvectors of a sparse symmetric positive definite matrix pencil is presented. The algorithm uses an iteration function and inverse power iteration process to get the largest one first, then executes m - 1 Lanczos-like steps to get initial approximations of the next m - 1 ones, without computing any Ritz pair, for which a procedure combining Rayleigh quotient iteration with shifted inverse power iteration is used to obtain more accurate eigenvalues and eigenvectors. This algorithm keep the advantages of preserving sparsity of the original matrices as in Lanczos method and RQI and converges with a higher rate than the method described in [12] and provides a simple technique to compute initial approximate pairs which are guaranteed to converge to the wanted m largest eigenpairs using RQL. In addition, it avoids some of the disadvantages of Lanczos and RQI, for solving extreme eigenproblems. When symmetric positive definite lira ear systems must be solved in the process, an algebraic multilevel iteration method (AMLI) is: applied. The algorithm is fully parallelizable. [ABSTRACT FROM AUTHOR]

关键词： eigenvalue sparse problem

Photocatalytic activity of Fe-doped CaTiO_3 under UV–visible light

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Journal of Environmental Sciences 2014年第7期26卷 1489-1495页

作者： He Yang chong Han Xiangxin Xue School of Materials and Metallurgy Northeastern University

The photocatalytic degradation of methylene blue（MB） over Fe-doped CaTiO3 under UV-visible light was investigated. The as-prepared samples were characterized using X-ray diffraction（XRD）, scanning electron microscope（SEM） equipped with an energy dispersive spectrometer（EDS） system, Fourier transform infrared spectra（FT-IR）, and UV-visible diffuse reflectance spectroscopy（DRS）. The results show that the doping with Fe significantly promoted the light absorption ability of CaTiO3 in the visible light region. The Fe-doped CaTiO3 exhibited higher photocatalytic activity than CaTiO3 for the degradation of ***, the photocatalytic activity of the Fe-doped CaTiO3 was greatly influenced by the calcination temperature during the preparation process. The Fe-doped CaTiO3 prepared at500°C exhibited the best photocatalytic activity, with degradation of almost 100% MB（10 ppm）under UV-visible light for 180 min.

关键词： Fe-doped CaTiO3 Methylene blue Photocatalytic activity UV-visible light

Crowd counting via learning perspective for multi-scale multi-view Web images

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Frontiers of Computer Science 2019年第3期13卷 579-587页

作者： chong SHANG Haizhou AI Yi YANG Tsinghua National Laboratory for Information Science and Technology Department of Computer Science and Technology Tsinghua University Beijing 100084 China Huawei Technologies Beijing 100084 China

Estimating the number of people in Web images still remains a challenging problem owing to the perspective variation, different views, and diverse backgrounds. Existing deep learning models still have difficulties in dealing with scenarios where the size of a person is either extremely large or extremely small. In this paper, we propose a novel perspective-aware architecture to estimate the number of people in a crowd in web images. Specifically, we use a two-stage framework, where we first learn a policy network to infer the perspective of the target scene, which outputs a scale label for the subsequent perspective normalization. Next, given the aligned inputs, we further adjust the scale-specific counting network to regress the final count. Experiments on challenging datasets demonstrate our approach can deal with a large perspective variation and that we have achieved state-of-theart results.

关键词： crowd counting Web images perspective inference

Organic topological insulators(OTI): a dream coming true?

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National Science Review 2020年第6期7卷 996-997页

作者： Danfeng Zhi chong-an Di Daoben Zhu Beijing National Laboratory for Molecular Sciences CAS Key Laboratory of Organic SolidsInstitute of Chemistry Chinese Academy of Sciences University of Chinese Academy of Sciences

Topological insulators (TIs) are a class of materials with insulating bulk states but exotic metallic states on their surfaces [1]. Benefiting from topological boundary states, TIs have become one of the most important topics in condensed materials, not only because they offer a unique perspective for revealing the origin of various quantum phases, but also because of their potential applications in spintronics and quantum com-

关键词： Electric insulators