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Communications in theoretical Physics 2008年第2期49卷 275-280页

作者： JiA man Department of Physics Shanghai Jiao Tong University Shanghai 200240 China Department of Physics North China Coal Medical College Tangshan 063000 China

Using Ablowitz-Ramani Segur algorithm, the coupled KdV systems are reclassified under the Painlevé integrable sense while the similarity reductions of the model are obtained by using the Clarkson and Kruskal＇s direct method. Some new types of Painlevé integrable models including a model with different dispersion relations for two layer fluids are found.

关键词： coupled KdV equation Painlevé classification similarity reductions

Quantum supremacy: some fundamental concepts

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National Science Review 2019年第1期6卷 22-23页

作者： man-Hong Yung Shenzhen institute for Quantum Science and Engineering and Department of Physics Southern University of Science and Technology Shenzhen Key Laboratory of Quantum Science and Engineering Southern University of Science and Technology

Quantum computation was envisioned by Feynman as a valuable means of solving quantum problems [1]. the question is, how do we prove the superiority of quantum computing over classical devices? A common misconception in describing the power of a quantum computer over a classical computer is that quantum bits can be prepared in a superposition of an exponential number of states, which cannot be achieved with classical bits. this statement is certainly true, but it does not tell us, specifically,what problems quantum computers can

关键词： Quantum supremacy some fundamental concepts

A landscape of β-Ga_(2)O_(3) Schottky power diodes

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Journal of Semiconductors 2023年第9期44卷 47-56页

作者： man Hoi Wong Department of Electronic and Computer Engineering Hong Kong University of Science and TechnologyClear Water BayKowloonHong KongChina

β-Ga_(2)O_(3) Schottky barrier diodes have undergone rapid progress in research and development for power electronic *** paper reviews state-of-the-art β-Ga_(2)O_(3) rectifier technologies,including advanced diode architectures that have enabled lower reverse leakage current via the reduced-surface-field *** device properties including onresistance,breakdown voltage,rectification ratio,dynamic switching,and nonideal effects are summarized for the different *** results on the high-temperature resilience of β-Ga_(2)O_(3) Schottky diodes,together with the enabling thermal packaging solutions,are also presented.

关键词： β-Ga_(2)O_(3) Schottky diodes power device edge termination nickel oxide

track Prediction of typhoon Neoguri 2008

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Communications in theoretical Physics 2009年第2期51卷 363-366页

作者： JiA man Department of Physics Shanghai Jiao Tong University Shanghai 200240 China

in this paper, the prediction of the track for No.1 tropical cyclone, Neoguri, is concretely provided by using a special solution to （2-1）-dimensional Euler Equation.

关键词： tropical cyclone Euler equation the induced flow

Recent insights into physiological responses to nutrients by the cylindrospermopsin producing cyanobacterium,Cylindrospermopsis raciborskii

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Journal of Oceanology and Limnology 2018年第4期36卷 1032-1039页

作者： Michele A.BURFORD Anusuya WiLLiS Ann CHUANG Xiao man Philip t.ORR Australian Rivers institute Griffith University

the harmful cyanobacterium Cylindrospermopsis raciborskii is a widespread species increasingly being recorded in freshwater systems around the world. Studies have demonstrated some key attributes of this species which may explain its global dominance. it has a high level of flexibility with respect to light and nutrients, being capable of growth under low and variable light conditions. However, it is the strategy with respect to nutrient utilization that has received more attention. Unlike many bloom forming species, the dominance of this species is not simply linked to higher nutrient loads. in fact it appears that it is more competitive when phosphorus and nitrogen availability is low and/or variable. An important component of this flexibility appears to be the result of within-population strain variability in responses to nutrients, as well as key physiological adaptations. Strain variability also appears to have an effect on the population-level cell quota of toxins, specifically cylindrospermopsins(CYNs). Field studies in Australia showed that populations had the highest proportion of toxic strains when dissolved inorganic phosphorus was added, resulting in stoichiometrically balanced nitrogen and phosphorus within the cells. these strategies are part of an arsenal of responses to environmental conditions, making it a challenging species to manage. However, our ability to improve bloom prediction will rely on a more detailed understanding of the complex physiology and ecology of this species.

关键词： nitrogen phosphorus cylindrospermopsins strains

Can cold dark matter paradigm explain the central-surface-densities relation?

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Research in Astronomy and Astrophysics 2017年第7期17卷 109-114页

作者： man-Ho Chan Department of Science and Environmental Studies The Education University of Hong Kong

Recently, a very strong correlation between the central surface density of stars and dynamical mass in 135 disk galaxies has been obtained. it has been shown that this central-surface-densities relation agrees very well with Modified Newtonian Dynamics（MOND）. in this article, we show that if we assume the baryons have an isothermal distribution and dark matter exists, then it is possible to derive by means of the Jeans equation an analytic central-surface-densities relation connecting dark matter and baryons that agrees with the observed relation. We find that the observed central-surface-densities relation can also be accommodated in the context of dark matter provided the latter is described by an isothermal profile. therefore, the observed relation is consistent with not only MOND.

关键词： (cosmology:) dark matter

Forms and Aesthetics of Bridges

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Engineering 2018年第2期4卷 103-112页

作者： man-Chung tang Chinese Academy of Engineering Beijing 100088 China US National Academy of Engineering Washington DC 20001 USA t.Y. Lin international Group San Francisco CA 94104 USA

the objective of a bridge design is to produce a safe bridge that is elegant and satisfies all functionality requirements, at a cost that is acceptable to the owner. A successful bridge design must be natural, simple, original, and harmonious with its surroundings. Aesthetics is not an additional consideration in the design of a bridge, but is rather an integral part of bridge design. Both the structural configuration and the aesthetics of a bridge must be considered together during the conceptual design stage. to achieve such a task, the bridge design engineer must have a good understanding of structural theory and bridge aesthetics.

关键词： Form Aesthetics Bridge Concept Design Environment

Small Molecule Organic Nanostructures—Fabrication and Properties

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Journal of Materials Science & technology 2008年第4期24卷 563-568页

作者： A.B.Djurii A.M.C.Ng Kai-Yin CHEUNG man-Kin FUNG Wai-Kin CHAN Department of Physics University of Hong KongPokfulam RoadHong KongHong Kong SARChina Department of Chemistry University of Hong KongPokfulam RoadHong KongHong Kong SARChina

Organic materials are of great interest for the development of low cost electronic and optoelectronic devices. Although majority of research on organic materials is concerned with synthesis of novel compounds and organic thin films, organic nanostructures are attracting increasing interest in recent years. We briefly review different growth methods of organic nanostructures, which can be roughly divided into vapor deposition methods and self-assembly techniques in solution. then we highlight some interesting properties of organic nanostructures, as well as possible applications, includinf field emission, electronic and optoelectronic devices.

关键词： Organic nanostructures Self-assembly Vapor deposition

Novel travelling wave structures:few-cyclepulse solitons and soliton molecules

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Communications in theoretical Physics 2021年第2期73卷 23-29页

作者： Zitong Chen man Jia School of Physical Science and technology Ningbo UniversityNingbo 315211China

We discuss a fifth order KdV(FOKdV)equation via a novel travelling wave method by introducing a background *** show that the background term plays an essential role in finding new abundant travelling wave structures,such as the soliton induced by negative background,the periodic travelling wave excited by the positive background,the few-cycle-pulse(FCP)solitons with and without background,the soliton molecules excited by the *** FCP solitons are first obuained for the FOKdV equation.

关键词： New travelling method a fifth order KdV equation solitons induced by background few-cycle-pulse solitons soliton molecules