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Wavelets in probability and statistics——A review in recent advances

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Chinese Science Bulletin 2002年第9期47卷 705-716页

作者： XIE Zhongjie Heung wong wai-Cheung Ip School of Mathematical Sciences Peking UniversityBeijing 100871China Department of Applied Mathematics The Hong Kong Polytechnic UniversityHong KongChina

The main purpose of this paper is to give a review on recent advances of wavelet in probability and statistics. Many interesting new ideas, new results and new methods are introduced in this review. From many aspects of this paper, probability and statistics researchers may find many new interesting research topics for further studying on wavelets in stochastic processes. New results, such as K- sta-tionarity, wavelet representation of Karhunen processes, hidden periodicities analysis by wavelet approach, hetero-scedasticity in wavelet regression, wavelets and neural networks, etc. are introduced in this paper. Comments, discussions and plentiful references are also involved in this review.

关键词： wavelets K-stationarity time varying spectral analysis nonlinear modeling wavelet variance.

QUASI-INTERPOLATING OPERATORS AND THEIR APPLICATIONS IN HyPERSINGULAR INTEGRALS

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Journal of Computational Mathematics 1998年第4期16卷 337-344页

作者： wong, RH Lu, y Dalian Univ Technol Inst Math Sci Dalian 116024 Peoples R China

The purpose of this paper is to propose and study a class of quasi-interpolating operators in multivariate spline space S-1/2(Delta(mn)(2*)) on non-uniform type-2 triangulation. Based on the operators, we construct cubature formula for two-dimensional hypersingular integrals. Some computing work have been done and the results are quite satisfactory.

关键词： hypersingular integral finite-part integral quasi-interpolating operator non-uniform type-2 triangulation

Recent progress of electronic materials based on 2,1,3-benzothiadiazole and its derivatives:synthesis and their application in organic light-emitting diodes

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Science China Chemistry 2021年第3期64卷 341-357页

作者： youming Zhang Jun Song Junie Qu Peng-Cheng Qian wai-y.ung wong Department of Applied Biology and Chemical Technology and Research Institute for Smart Energy1 The Hong Kong Polytechnic University(PolyU)Hung HomHong KongChina PolyU Shenzhen Research Institute Shenzhen 518057China College of Materials Science and Engineering Shenzhen UniversityShenzhen 518060China Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province College of Physics and Optoelectronic Engineering.Shenzhen UniversityShenzhen 518060China Key Laboratoty of Environmental Functional Materials Technology and Application of Wenzhou City Institute of New Materials&IndustiyCollege of Chemistry&Materials Engineering.Wenzhou UniversityWenzhou 325035China

2,1,3-Benzothiadiazole(BT)and its derivatives are very important acceptor units used in the development of photoluminescent compounds and are applicable for the molecular construction of organic light-emitting diodes,organic solar cells and organic field-effect *** to their strong electron-withdrawing ability,construction of molecules with the unit core of BT and its derivatives can usually improve the electronic properties of the resulting organic *** this contribution,we review the synthesis of various polymers,small molecules and metal complexes with BT and its derivatives and their applications in organic light-emitting ***,the molecular design rules based on these cores are discussed.

关键词： 2,1,3-benzothiadiazole organic light-emitting diodes synthesis electronic properties photoluminescence

Insights on advanced substrates for controllable fabrication of photoanodes toward efficient and stable photoelectrochemical water splitting

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Carbon Energy 2024年第4期6卷 164-221页

作者： Huilin Hou Gang Shao yang Wang wai‐y.ung wong Weiyou yang Institute of Micro/Nano Materials and Devices Ningbo University of TechnologyNingboChina School of Materials Science and Engineering Zhengzhou UniversityZhengzhouChina Department of Applied Biology and Chemical Technology and Research Institute for Smart Energy The Hong Kong Polytechnic UniversityHong KongChina

Conversion of solar energy into H_(2) by photoelectrochemical(PEC)water splitting is recognized as an ideal way to address the growing energy crisis and environmental *** a typical PEC cell,the construction of photoanodes is crucial to guarantee the high efficiency and stability of PEC reactions,which fundamentally rely on rationally designed semiconductors(as the active materials)and substrates(as the current collectors).In this review work,we start with a brief introduction of the roles of substrates in the PEC ***,we provide a systematic overview of representative strategies for the controlled fabrication of photoanodes on rationally designed substrates,including conductive glass,metal,sapphire,silicon,silicon carbide,and flexible ***,some prospects concerning the challenges and research directions in this area are proposed.

关键词： hydrogen photoanode photoelectrochemical substrates water splitting

An overview on AIEgen-decorated porphyrins:Current status and applications

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Aggregate

Aggregate 2023年第3期4卷 55-70页

作者： Govardhana Babu Bodedla Xunjin Zhu wai-y.ung wong Department of Applied Biology&Chemical Technology and Research Institute for Smart Energy The Hong Kong Polytechnic UniversityHong KongP.R.China The Hong Kong Polytechnic University Shenzhen Research Institute ShenzhenP.R.China Department of Chemistry Hong Kong Baptist UniversityHong KongP.R.China

One of the major obstacles of porphyrins is the aggregation-caused quenching(ACQ)of photoluminescence due to the strong intermolecularπ–πinteraction of the planar porphyrin core in the solid ***,ACQ leads to the nonradiative deactivation of the photoexcited states which results in short-lived charge-separated states and thus low photoluminescence and singlet quantum *** phenomenon would limit the utilization of porphyrins in near-infrared fluorescent bioimaging,photodynamic therapy,photocatalytic hydrogen evolution,electrochemiluminescence,and chiroptical ***,to address the ACQ property of porphyrins and enhance the performance of the above applications,a limited number of AIEgen-decorated porphyrins have been designed,synthesized,and tested for their *** has been found that the introduction of AIEgens,such as tetraphenylethylene,diphenylacrylonitrile,(3,6-bis-(1-methyl-4-vinylpyridinium)-carbazole diiodide,and iridium motif into the porphyrin core,transformed the porphyrins from ACQ to aggregation-induced emission(AIE)in their solid state due to the reduced strong intermolecularπ–πstacking of ***,such porphyrins containing AIE features are employed as potential candidates in the above-mentioned *** this review,we summarize the AIEgen-decorated porphyrins which have been published to date,and also discuss the benefits of converting porphyrins from ACQ to AIE for enhanced performance within each *** far as we know,there is no review that summarizes the structures and applications of AIEgen-decorated porphyrins to ***,we presume that this review would be helpful to design more efficient AIEgen-decorated porphyrins for a wide range of applications in the future.

关键词： aggregation-caused quenching aggregation-induced emission AIE luminogen FRET and solid state emission porphyrin

Steering S-scheme charge transfer via interfacial dipoles induced by amine-containing polyelectrolytes

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Science China Chemistry 2023年第7期66卷 2098-2108页

作者： Tao Li Chuang Feng Biquan Xiong Xuhui Zhu Zhicai He wai-y.ung wong Institute of Polymer Optoelectronic Materials and Devices State Key Laboratory of Luminescent Materials and DevicesSchool of Material Science and EngineeringSouth China University of TechnologyGuangzhou 510640China Department of Applied Biology&Chemical Technology and Research Institute for Smart Energy The Hong Kong Polytechnic UniversityHung HomHong KongChina

The lack of a robust interfacial driving source over multicomponent photocatalysts is an essential contributor to the sluggish spatial charge transfer across the heterointerface and severe carrier recombination,thereby rendering maneuvering charge transfer of composite materials a thorny ***,we demonstrate an electric dipole moment-driven charge transfer photosystem utilizing amine-containing polyfluorene polyelectrolyte(i.e.,PFN)and inorganic semiconductor matrices(i.e.,WO_(3))as the building blocks to direct the interfacial charge transfer,effectively targeting the photoexcited charge carriers to the active *** results and theoretical simulations reveal that the electronic coupling interaction between the pendant electron-rich amine groups along the PFN backbone and WO_(3)surface enables the nonuniform charge distribution at the interface over the WO_(3)@PFN heterojunction,which ultimately fosters the formation of interfacial dipoles oriented from conjugated macromolecular backbone of PFN to the surface of WO_(3)*** interfacial dipoles with excellent charge transfer kinetics spontaneously activate the unidirectional and accelerated S-scheme charge motion from the WO_(3)framework to the conjugated chain of PFN due to the suitable band offsets at the interface,thus endowing WO_(3)@PFN heterostructures with a significantly enhanced net efficiency of *** findings would provide some insights into the design of advanced heterojunction photocatalysts for solar energy conversion as well as the study of the working mechanism of polyelectrolyte interlayers in optoelectronic devices.

关键词： photocatalysis heterojunction interfacial dipole polyelectrolyte S-scheme

Engineering advanced dynamic biomaterials to optimize adoptive T-cell immunotherapy

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Engineered Regeneration 2021年第1期2卷 70-81页

作者： wai Ki wong Bohan yin Anel Rakhmatullina Jingying Zhou Siu Hong Dexter wong Department of Bioengineering Imperial College LondonLondon SW72AZUnited Kingdom Department of Biomedical Engineering The Hong Kong Polytechnic UniversityKowloonHong KongChina School of Biomedical Sciences The Chinese University of Hong KongShatinHong KongChina

Adoptive T-cell therapy(ACT)is a promising therapeutic approach based on the concept of potent T-cell mediated immunity against the *** outcome of antigen-specific T-cells responses relies on the interaction between T-cells and antigen-presenting cells,which provides signals for generating different T-cell phenotypes with different roles in tumor ***,such interaction is often not optimal in vivo and results in low therapeutic *** reach the full potential of the T-cell response,current research put effort into developing dynamic biomaterials as artificial antigen-presenting cells to study and regulate the T-cell activity for controlling T-cell *** this perspective,we provide(1)an overview of ACT and general T-cells behaviors,(2)explore the insight on how biomaterials can be used for studying and regulating T-cell behaviors,(3)and discuss conceptual gaps in knowledge for biomaterials-based immunotherapy.

关键词： T-cell mechanobiology Dynamic nanobiomaterials Adoptive T-cell immunotherapy T-Ligand presentation

A fuzzy risk assessment model used for assessing the introduction of African swine fever into Australia from overseas

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Artificial Intelligence in Agriculture 2023年第1期7卷 27-34页

作者： Hongkun Liu yongLin Ren Huanhuan Chu Hu Shan Kok wai wong College of Veterinary Medicine Qingdao Agriculture UniversityQingdaoPR China Murdoch University 90 South StreetMurdochWestern Australia 6150Australia

African swine fever(ASF)is a contagious and lethal hemorrhagic disease with a high case fatality *** 2007,ASF has been spreading into many countries,especially in Europe and *** that there is no effective vaccine and treatment to deal with ASF,prevention is an important way for a country to avoid the effects of the *** is currently ASF-free but the disease has been reported in many neighboring countries,such as Indonesia,Timor-Leste,and Papua New ***,it is necessary for Australia to maintain hypervigilance to prevent the ASF *** this paper,we propose the use of fuzzy concepts to establish a fuzzy risk assessment model to predict the ASF introduction risk in *** the analysis,the international passengers(IP)and international import trade(IIT)are concluded as the two main ASF introduction factors based on transmission features and past *** the established fuzzy risk assessment model based on the analysis of the 2019 and 2020 data,the risks of ASF introduction into Australia are considered to be *** model further deduced that the Asian region was the major source of potential ***,in order to validate the effectiveness of the established fuzzy risk assessment model,the qualitative data from the Department for Environment,Food&Rural Affairs of the United Kingdom was *** the validation results,it has shown that the results were consistent when the same data is adopted,and thus proved that the functionality of the established fuzzy risk assessment model for assessing the risk in Australia.

关键词： Risk assessment Fuzzy model African swine fever(ASF) ASF introduction Australia

Epidemiology and Clinical Outcomes of Metabolic(Dysfunction)-associated Fatty Liver Disease

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Journal of Clinical and Translational Hepatology 2021年第6期9卷 972-982页

作者： Huapeng Lin Xinrong Zhang Guanlin Li Grace Lai-Hung wong Vincent wai-Sun wong Department of Medicine and Therapeutics State Key Laboratory of Digestive diseaseand Medical Data Analytics CentreThe Chinese University of Hong KongHong KongChina

Metabolic(dysfunction)-associated fatty liver disease(MAFLD)is currently the most common chronic liver disease and affects at least a quarter of the global adult *** has rapidly become one of the leading causes of hepatocellular carcinoma and cirrhosis in Western *** this review,we discuss the nomenclature and definition of MAFLD as well as its prevalence and incidence in different geographical *** cardiovascular disease remains the leading cause of death in MAFLD patients,the proportion of patients dying from hepatic complications increases sharply as the disease progresses to advanced liver fibrosis and *** addition,patients with MAFLD are at increased risk of various extrahepatic *** a causal relationship between MAFLD and extrahepatic cancers has not been established,clinicians should recognize the association and consider cancer screening(e.g.,for colorectal cancer)as appropriate.

关键词： Nonalcoholic fatty liver disease Nonalcoholic steatohepatitis Obesity Prevalence Incidence Hepatocellular carcinoma Cirrhosis