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Universal bound on sampling bosons in linear optics and its computational implications

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National science Review 2019年第4期6卷 719-729页

作者： man-Hong Yung Xun Gao Joonsuk Huh 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 Central Research Institute Huawei Technologies Center for Quantum Information Institute for Interdisciplinary Information SciencesTsinghua University Department of Chemistry Sungkyunkwan University

In linear optics, photons are scattered in a network through passive optical elements including beam splitters and phase shifters, leading to many intriguing applications in physics, such as Mach–Zehnder interferometry, the Hong–Ou–mandel effect, and tests of fundamental quantum mechanics. Here we present the fundamental limit in the transition amplitudes of bosons, applicable to all physical linear optical networks. Apart from boson sampling, this transition bound results in many other interesting applications,including behaviors of Bose–Einstein condensates(BEC) in optical networks, counterparts of Hong–Ou–mandel effects for multiple photons, and approximating permanents of matrices. In addition,this general bound implies the existence of a polynomial-time randomized algorithm for estimating the transition amplitudes of bosons, which represents a solution to an open problem raised by Aaronson and Hance(Quantum Inf Comput 2012; 14: 541–59). Consequently, this bound implies that computational decision problems encoded in linear optics, prepared and detected in the Fock basis, can be solved efficiently by classical computers within additive errors. Furthermore, our result also leads to a classical sampling algorithm that can be applied to calculate the many-body wave functions and the s-matrix of bosonic particles.

关键词： boson sampling quantum optics quantum supremacy linear optics computational complexity

教育强国视域下高质量教师教育体系的理论认识与实践设计——专访东北师范大学柳海民教授

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教师教育学报 2025年第1期12卷 1-8页

作者：柳海民满莹东北师范大学教育学部吉林长春130024

柳海民教授长期致力于教育质量与教育体系建设的学术研究。经济领域提出高质量发展政策话语后,柳海民教授带领团队率先开展了教育高质量发展研究,并先后获批“新时代中国教育高质量发展的路径与对策研究”“高质量教育体系的内涵、比较... 详细信息

柳海民教授长期致力于教育质量与教育体系建设的学术研究。经济领域提出高质量发展政策话语后,柳海民教授带领团队率先开展了教育高质量发展研究,并先后获批“新时代中国教育高质量发展的路径与对策研究”“高质量教育体系的内涵、比较与建设路径研究”两项国家社科基金重大项目。近年来,该团队已形成了一系列以“教育高质量发展”为核心的学术成果。高质量的教师队伍是教育高质量发展的关键支撑,也是教育强国建设的中坚力量。柳海民教授重点阐述了高质量教师教育体系在支撑教育强国建设中的理论认识与实践路径。他认为,高质量教师教育体系对于教育强国建设的价值,既体现在对建设高质量教育体系的支撑作用上,又体现在对解决学科发展困境的现实需求上。他强调高质量教师教育体系的内涵特征应紧紧把握“高质量”“体系化”“自主性”三个方面。当前,教师教育已支撑中国建成了世界最大规模的教育体系,教师教育模式的持续创新有效促进了教师素质的整体提升,高质量教师教育体系正助推中国教育国际竞争力不断攀升。在教育强国背景下,高质量教师教育体系建设需要教育家精神的引领、科学系统的制度设计以及高效灵活的教育治理模式。

关键词：教育强国建设高质量教师教育体系教师教育模式教育高质量发展教育家精神

CUEDC2:an emerging key player in inflammation and tumorigenesis

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Protein & Cell 2011年第9期2卷 699-703页

作者： Jianghong man Xuemin Zhang Institute of Basic Medical sciences National Center of Biomedical AnalysisBeijing 100850China

CUE domain-containing 2(CUEDC2)is a protein involved in the regulation of the cell cycle,inflammation,and tumorigenesis and is highly expressed in many types of ***2 is phosphorylated by Cdk1 during mitosis and promotes the release of anaphase-promoting complex or cyclosome(APC/C)from checkpoint ***2 is also known to interact with IkB kinaseα(IKKα)and IKKβand has an inhibitory role in the activation of transcription factor nuclear factor-κ***,CUEDC2 plays an important role in downregulating the expression of hormone receptors estrogen receptor-αand progesterone receptor,thereby impairing the responsiveness of breast cancer to endocrine *** this review,current knowledge on the multi-functions of CUEDC2 in normal processes and tumorigenesis are discussed and summarized.

关键词： CUEDC2 inflammation cell cycle nuclear factor-κB tumorigenesis

Endpoint Estimates of Generalized Homogeneous Littlewood–Paley g-functions over Non-Homogeneous Metric Measure spaces

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Acta Mathematica sinica,English series 2016年第9期32卷 1035-1074页

作者： Xing FU Ji man ZHAO school of Mathematical sciences Beijing Normal University Laboratory of Mathematics and Complex Systems Ministry of Education Beijing 100875 P. R. China

Let （x, d,u） be a metric measure the upper doubling conditions. Under the weak space satisfying both the geometrically doubling and reverse doubling condition, the authors prove that the generalized homogeneous Littlewood-Paley g-function gr （r ∈ [2, ∞）） is bounded from Hardy space H1（u） into L1（u）. Moreover, the authors show that, if f ∈ RBMO（u）, then [gr（f）]r is either infinite everywhere or finite almost everywhere, and in the latter case, [gr（f）]r belongs to RBLO（u） with the norm no more than ｜｜f｜｜ RBMO（u） multiplied by a positive constant which is independent of f. As a corollary, the authors obtain the boundedness of gr from RBMO（u） into RBLO（u）. The vector valued Calderon-Zygmund theory over （X, d, u） is also established with details in this paper.

关键词： Non-homogeneous metric measure space generalized homogeneous Littlewood-Paley g-function Hardy space RBMO(u) RBLO(u) vector valued Calderon Zygmund theory

Damage effect analysis and experiment for electronic equipment in impact vibration environment

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Journal of systems Engineering and Electronics 2009年第6期20卷 1384-1388页

作者： shi Quan Tian Juan man Qiang Dept. of management Engineering Shijiazhuang Mechanical Engineering Coll. Shijiazhuang 050003 P. R. China

This paper analyzes the electronic equipment＇s effect factors such as structure characteristics and *** radar equipment is taken as an experimental *** damage laws of electro-products in vibration environment are *** experiment shows that the damage of electro-products in vibration environment has relations with both the type and amplitude of vibration and their structure.

关键词： electro-product vibration environment damage effect.

Littlewood–Paley Operators on spaces with Variable Exponent on Homogeneous Groups

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Acta Mathematica sinica,English series 2020年第5期36卷 535-558页

作者： Dong Li LIU Ji man ZHAO Key Laboratory of Mathematics and Complex systems Ministry of Education Institution of Mathematics and Mathematical Education School of Mathematical SciencesBeijing Normal UniversityBeijing 100875P.R.China

In this paper,on homogeneous groups,we study the Littlewood–Paley operators in variable exponent ***,we prove that the weighted Littlewood–Paley operators are controlled by the weighted Hardy–Littlewood maximal function,and obtain the vector-valued inequalities of the Littlewood–Paley operators,including the Lusin function,Littlewood–Paley g function and gλ* ***,we prove the boundedness of multilinear Littlewood–Paley gψ,λ* function.

关键词： Littlewood–Paley operators variable Lebesgue spaces homogeneous groups

Computational fluid dynamics simulation of the wind flow over an airport terminal building

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Journal of Zhejiang University-science A(Applied Physics & Engineering) 2010年第6期11卷 389-401页

作者： Chun-ho LIU Dennis Y.C.LEUNG Alex C.s.man P.W.CHAN Department of Mechanical Engineering The University of Hong Kong Hong Kong Observatory

Turbulence in the wake generated by wind flow over buildings or obstacles may produce complex flow patterns in downstream *** include the recirculating flow and wind deficit areas behind an airport terminal building and their potential impacts on the aircraft landing on nearby runways.A computational fluid dynamics(CFD) simulation of the wind flow over an airport terminal building was performed in this study of the effect of the building wake on landing *** normal meteorological conditions,the studied airport terminal building causes limited effects on landing aircraft because most of the aircraft have already landed before entering the turbulent wake *** simulating the approach of a tropical cyclone,additional CFD sensitivity tests were performed to study the impacts of building wake under extreme meteorological *** was found that,in a narrow range of prevalent wind directions with wind speeds larger than a certain threshold value,a substantial drop in wind speed(>3.6 m/s) along the glide path of aircraft was observed in the building *** CFD results also showed that under the most critical situation,a drop in wind speed as large as 6.4 m/s occurred right at the touchdown point of landing aircraft on the runway,an effect which may have a significant impact on aircraft *** study indicated that a comprehensive analysis of the potential impacts of building wake on aircraft operations should be carried out for airport terminals and associated buildings in airfields to ensure safe aviation operation under all meteorological conditions and to facilitate implementation of precautionary measures.

关键词： Aviation safety Building aerodynamics Computational fluid dynamics (CFD) k-e turbulence model Tropicalcyclone

Emerging roles of astrocytes in blood-brain barrier disruption upon amyloid-beta insults in Alzheimer's disease

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Neural Regeneration Research 2023年第9期18卷 1890-1902页

作者： Qian Yue Maggie Pui man Hoi state Key Laboratory of Quality Research in Chinese Medicine Institute of Chinese Medical SciencesUniversity of MacaoMacao Special Administrative RegionChina Department of Pharmaceutical sciences Faculty of Health SciencesUniversity of MacaoMacao Special Administrative RegionChina

Blood-brain barrier disruption occurs in the early stages of Alzheimer’s *** studies indicate a link between blood-brain barrier dysfunction and cognitive decline and might accelerate Alzheimer’s disease *** are the most abundant glial cells in the central nervous system with important roles in the structural and functional maintenance of the blood-brain *** example,astrocytic cove rage around endothelial cells with perivascular endfeet and secretion of homeostatic soluble factors are two major underlying mechanisms of astrocytic physiological *** activation is often observed in Alzheimer’s disease patients,with astrocytes expressing a high level of glial fibrillary acid protein detected around amyloid-beta plaque with the elevated phagocytic ability for *** alte rations in Alzheimer’s disease astrocytes including swollen endfeet,somata shrinkage and possess loss contribute to disruption in vascular integrity at capillary and arte rioles *** addition,Alzheimer’s disease astrocytes are skewed into proinflammatory and oxidative profiles with increased secretions of vasoactive mediators inducing endothelial junction disruption and immune cell *** this review,we summarize the findings of existing literature on the relevance of astrocyte alte ration in response to amyloid pathology in the context of blood-brain barrier ***,we briefly describe the physiological roles of astrocytes in blood-brain barrier ***,we review the clinical evidence of astrocyte pathology in Alzheimer’s disease patients and the preclinical evidence in animal and cellular *** further discuss the structural changes of blood-brain barrier that correlates with Alzheimer’s disease ***,we evaluate the roles of soluble factors secreted by Alzheimer’s disease astrocytes,providing potential molecular mechanisms underlying blood-brain barrier *** conclude with a

关键词： Alzheimer’s disease amyloid-beta astrocyte(astroglial)-endothelial interaction astrocyte pathology blood-brain barrier blood-brain barrier disruption brain endothelial cell neuroinflammation reactive astrocyte

self-normalized Cramer-type Moderate Deviations for Functionals of Markov Chain

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Acta Mathematicae Applicatae sinica 2020年第2期36卷 294-313页

作者： Xin-wei FENG Qi-man sHAO Zhongtai securities Institute for Financial studies Shandong UniversityJinan 250100China Department of statistics The Chinese University of Hong KongShatinN.T.Hong KongChina Department of statistics and Data science Southern University of Science and TechnologyShenzhen 518000China

Let{xn,n≥0}be a Markov chain with a countable state space s and let f(·)be a measurable function from s to R and consider the functionals of the Markov chain yn:=f(xn).We construct a new type of self-normalized sums based on the random-block scheme and establish a Crame′r-type moderate deviations for self-normalized sums of functionals of the Markov chain.

关键词： self-normalized partial sums Cramer-type moderate deviations Markov Chain ergodic