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Dependent Randomization in Parallel Binary Decision Fusion

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IEEE/CAA Journal of Automatica Sinica 2021年第2期8卷 361-376页

作者： Weiqiang Dong Moshe kam the Department of Electrical and Computer Engineering New Jersey Institute of TechnologyUniversity HeightsNJ 07102 USA

We consider a parallel decentralized detection system employing a bank of local detectors(LDs)to access a commonly-observed *** system makes a binary decision about the phenomenon,accepting one of two hypotheses(H_(0)("absent")or H_(1)("present")).The kth LD uses a local decision rule to compress its local observations yk into a binary local decision uk;uk=0 if the kth LD accepts H_(0)and uk=1 if it accepts H_(1).The kth LD sends its decision uk over a noiseless dedicated channel to a Data Fusion Center(DFC).The DFC combines the local decisions it receives from n LDs(u_(1),u_(2),...,u_(n))into a single binary global decision u_(0)(u_(0)=0 for accepting H_(0)or u_(0)=1 for accepting H_(1)).If each LD uses a single deterministic local decision rule(calculating uk from the local observations yk)and the DFC uses a single deterministic global decision rule(calculating u_(0)from the n local decisions),the team receiver operating characteristic(ROC)curve is in general *** system's performance under a Neyman-Pearson criterion may then be suboptimal in the sense that a mixed strategy may yield a higher probability of detection when the probability of false alarm is constrained not to exceed a certain value,α>***,a"dependent randomization"detection scheme can be applied in certain circumstances to improve the system's performance by making the ROC curve *** scheme requires a coordinated and synchronized action between the DFC and the *** this study,we specify when dependent randomization is needed,and discuss the proper response of the detection system if synchronization between the LDs and the DFC is temporarily lost.

关键词： Data fusion decision fusion dependent randomization parallel decentralized detection synchronization

Schematic interface of sound creation for computer animators

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2006年第7期7卷 1141-1151页

作者： TONG kam-pang Maya WONG kam-wah School of Creative Media City University of Hong Kong Hong Kong China

As an audiovisual medium, computer animations require superior image quality and professional soundtrack to lead audiences into their fascinating virtual world. Without sound, the impact of storytelling is reduced or the story is even not under- standable. Despite the importance of sound, most animators are unfamiliar with sound editing software. Limited budget projects such as independent or student works have difficulty hiring sound professionals to create tailor-made soundtrack. Therefore, we need a suitable sound tool to express their individual ideas. In this paper, we propose an approach using schematic for both computer animation and sound. Our approach provides (1) physical simulation on sound through animation parameters and (2) a new channel for animators to add aesthetic values in sound through their experience of using schematics in existing animation software. We demonstrate our idea through several examples, such as Doppler shift, obstacle effect, importance, energetic, and sputtering effect.

关键词： Computer animation Multimedia Digital media Schematics Physical simulation Aesthetic Sound effects Soundtrack

Homoclinic and heteroclinic solutions of cubic strongly nonlinear autonomous oscillators by hyperbolic Lindstedt-Poincaré method

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Science China(Technological Sciences) 2010年第3期53卷 692-702页

作者： SZE kam Yim Department of Mechanical Engineering The University of Hong Kong

The hyperbolic Lindstedt-Poincaré method is applied to determine the homoclinic and heteroclinic solutions of cubic strongly nonlinear oscillators of the form x + c1 x + c3 x 3= ε f (μ,x,x).In the method,the hyperbolic functions are employed instead of the periodic functions in the Lindstedt-Poincaré *** value of parameter μ under which there exists homoclinic or heteroclinic orbit can be determined by the perturbation *** applications are studied in *** illustrate the accuracy of the present method,its predictions are compared with those of Runge-Kutta method.

关键词： Lindstedt-Poincaré Method nonlinear autonomous oscillator homoclinic orbit heteroclinic orbit

OPTIMAL PROPORTIONAL REINSURANCE UNDER DEPENDENT RISKS

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Journal of Systems Science & Complexity 2012年第6期25卷 1171-1184页

作者： Fengqing HU kam C YUEN Department of Mathematics and Center for Financial Engineering Soochow University Department of Statistics and Actuarial Science University of Hong KongHong KongChina

This paper considers a correlated risk model with thinning-dependence structure. The au- thors investigate the optimal proportional reinsurance that maximizes the adjustment coefficient and the optimal proportional reinsurance under mean variance principle for the proposed model. The au- thors derive the optimal solutions and the numerical illustrations to show the impact of the dependence among the classes of business on the optimal reinsurance arrangements.

关键词： Adjustment coefficient mean-variance principle optimal proportional reinsurance thinning-dependence structure.

Coefficients of symmetric square L-functions

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Science China Mathematics 2010年第9期53卷 2317-2328页

作者： LAU Yuk-kam Department of Mathematics The University of Hong Kong

Let λsym2f(n) be the n-th coefficient in the Dirichlet series of the symmetric square L-function associated with a holomorphic primitive cusp form *** prove Ω± results for λsym2f(n) and evaluate the number of posi... 详细信息

关键词： Fourier coefficients of modular forms B-free numbers

An omega result for supremum norms of Hecke-eigenforms in the level aspect

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Science China Mathematics 2010年第1期53卷 223-242页

作者： LAU Yuk-kam Department of Mathematics The University of Hong KongPokfulam RoadHong KongChina

This note is to remark the large supremum norms of some Hecke-eigenforms of large squarefree levels and nebentypus of small conductors,based on the recent prominent progress by Soundararajan on the extreme central val... 详细信息

关键词： Hecke-eigenforms central values of L-functions

Silicon-based metal-organic frameworks(SiMOFs)for immunogenic cell death in cancer therapy

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Nano Research 2025年第1期18卷 628-641页

作者： Min Han Zishan Chen Shiying Zhou Zunde Liao Xiangting Yi Yao He Yiling Zhong kam W.Leong College of Pharmacy State Key Laboratory of Bioactive Molecules and Druggability AssessmentJinan UniversityGuangzhou 511443China Department of Biomedical Engineering Columbia UniversityNew YorkNY 10027USA Institute of Functional Nano and Soft Materials(FUNSOM) Soochow UniversitySuzhou 215123China

Silicon-based nanomaterials,known for their unique properties and favorable biocompatibility,significantly impact sectors like energy,electronics,and ***,metalorganic frameworks(MOFs)have emerged as promising candidates for biomedicine,characterized by adjustable chemical composition,high porosity,and ***,the combination of silicon with MOFs to create silicon-based MOF nanostructures(SiMOFs)remains ***,we establish a diverse library of SiMOFs with various nanostructures,including flower-like,capsule-like,hexagonal snowflake-like,and necklace-like morphologies via microwave-assisted *** SiMOFs,with their spacious interiors,are ideal for drug *** are used to load drugs and create drug-loaded SiMOFs(e.g.,SiFeO).SiFeO exhibits excellent photothermal effects and high reactive oxygen species(ROS)generation capacity,enabling synergistic treatments involving chemochemodynamic-photothermal *** approach efficiently triggers immunogenic cell death(ICD)and demonstrates excellent antitumor efficacy in *** staining reveals that the synergistic therapy can modulate the tumor microenvironment(TME)by reducing M2-phenotype macrophages,increasing the activation of antigen-presenting cells(APCs),enhancing the infiltration of CD4^(+)and CD8^(+)T cells,elevating Granzyme B production,and decreasing the presence of immunosuppressive regulatory T cells(Tregs).Consequently,drug-loaded SiMOFs-mediated combination therapy effectively reverses the immunosuppressive TME and activates robust antitumor immune responses by inducing ICD in tumor cells,ultimately achieving superior anticancer efficacy.

关键词： silicon-based nanomaterials nanocarriers immunogenic cell death antitumor immune responses

Asymptotic Results for Tail Probabilities of Sums of Dependent and Heavy-Tailed Random Variables

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Chinese Annals of Mathematics,Series B 2012年第4期33卷 557-568页

作者： kam Chuen YUEN Chuancun YIN Department of Statistics and Actuarial Science The University of Hong Kong Pokfulam Road HongKong China. Corresponding author. School of Mathematical Sciences Qufu Normal University Qufu 273165 Shan- dong China

Abstract Let X1, X2,... be a sequence of dependent and heavy-tailed random variables with distributions F1, F2,.. on （-∞,∞）, and let T be a nonnegative integer-valued random variable independent of the sequence {Xk, k 〉 1}. In this framework, the asymptotic behavior of the tail probabilities of the quantities Sn = fi Xk and S（n） =∑ k=1 n 〉 1, and their randomized versions ST and S（τ） are studied. Some risk theory are presented. max Sk for 1〈k〈n applications to the

关键词： Asymptotic tail probability Copula Heavy-tailed distribution Partialsum Risk process

Are chaos and catastrophe theories relevant to environmental sciences?

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Journal of Environmental Sciences 1992年第1期4卷 39-42页

作者： John Kaihong kam Morrison Hill P. O. Box 47478 Hong Kong

Data acquired in the area of Environmental Sciences are by their very nature often discontinuous and abrupt. As such, the mathematical theories of catastrophe and chaos may be of use in analyzing such scientific data ... 详细信息

关键词： chaos catastrophe environment.