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An introduction to on-shell recursion relations

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Frontiers in Biology 2012年第5期7卷 533-575页

作者： Bo Feng Mingxing luo Zhejiang Institute of Modern Physics Zhejiang UniversityHangzhou 310027China Center of Mathematical Science Zhejiang UniversityHangzhou 310027China

This article provides an introduction to on-shell recursion relations for calculations of tree-level amplitudes. Starting with the basics, such as spinor notations and color decompositions, we ex- pose analytic properties of gauge-boson amplitudes, BCFW-deformations, the large z-behavior of amplitudes, and on-shell recursion relations of gluons. We discuss further developments of on-shell recursion relations, including generalization to other quantum field theories, supersymmetric theo- ties in particular, recursion relations for off-shell currents, recursion relation with nonzero boundary contributions, bonus relations, relations for rational parts of one-loop amplitudes, recursion relations in 3D and a proof of CSW rules. Finally, we present samples of applications, including solutions of split helicity amplitudes and of Af = 4 SyM theories, consequences of consistent conditions under re- cursion relation, Kleiss-Kuijf （KK） and Bern-Carrasco-Johansson （BCJ） relations for color-ordered gluon tree amplitudes, Kawai-Lewellen-Tye （KLT） relations.

关键词： amplitude on-shell recursion relation

A Novel Predictive Congestion Control Algorithm for Urban Traffic Network 36

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A Novel Predictive Congestion Control Algorithm for Urban Tr...

An Improved Dropout Method and its Application into DBN-based Handwriting Recognition 36

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作者： Ran Tao yugeng Xi Dewei Li yiyao luo Department of Automation Shanghai Jiao Tong UniversityKey Laboratory of System Control and Information Processing Ministry of Education of China

ISBN: (纸本)9781538629185

For some big cities where congestion occurs frequently,this paper proposes a novel predictive congestion control algorithm,focusing on imposing hard constraints on links for avoiding *** the urban traffic network is often optimized with some micro-integrated global performance indexes,which equalize the effect of congestion and the emergency of congestion may be ***,for cities with heavy congestion,more attentions should be directly paid to congestion avoidance which may be particularly sensitive for urban traffic managers and individual *** use the universal standard of length of the queue to describe the congestion status of the *** simplifying the macroscopic urban traffic S model,we approximately get a linear relationship between signals and queue lengths such that we can predict the future congestion status of the *** on this,we transform the traditional optimization into formulating the urban traffic congestion control as a constraint satisfaction problem（CSP） where congestion avoidance conditions are imposed on the links and the problem can be characterized by finding the feasible solution for a group of linear *** the problem is non-feasible,we further develop a hierarchical strategy to guarantee the most important links without *** results show that the control approach significantly decreases the number of congested links compared to other controllers.

关键词： Traffic Congestion Control Model Predictive Control Constraint Satisfaction Problem

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An Improved Dropout Method and its Application into DBN-base...

3-D Marine CSEM Modeling in General Anisotropic Media by Using an Adaptive Finite Element Approach Based on the Vector-Scalar Potential

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作者： Guangzheng Hu Huifang Li Lixuan luo yuanqing Xia School of Automation Beijing Institute of Technology Department of Computer Science University of Toronto

ISBN: (纸本)9781538629185

As a typical deep learning method,Deep Belief Network（DBN） and Dropout method are usually used together for pattern recognition in case of lacking training *** training can avoid the overfitting phenomenon in deep neural *** the testing stage,the outputs of all neurons in hidden layers are multiplied by a same factor as their actual outputs in the original Dropout *** does not consider that the participation of a few poor-recognition models may reduce the recognition accuracy of its whole DBN *** paper proposed an improved Dropout method,which can further increase the recognition accuracy of DBN by introducing probability *** comparison of recognition results for MNIST handwritten digit database shows that the improved method can outperform the original and traditional identification methods under the same conditions.

关键词： Deep learning deep belief network dropout training handwriting recognition

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Journal of Ocean University of China 2022年第5期21卷 1205-1213页

作者： yE yixin JIANG Fenyong FENG Zhibing luo Ming LI Gang LI yuguo State Key Laboratory of Nuclear Resource and Environment East China University of TechnologyNanchang 330013China College of Marine Geosciences Ocean University of ChinaQingdao 266100China Ocean College Zhejiang UniversityZhoushan 316021China

We present three-dimensional(3-D)modeling method of marine controlled-source electromagnetic(CSEM)fields in general anisotropic media using an adaptive finite element approach based on the vector-scalar *** modeling is based on the governing Helmholtz equations in the vector-scalar potential *** tetrahedral grids are employed,which can exactly simulate the terrain relief and complex electrical ***,based on the gradient recovery technology,the adaptive finite element approach is used to drive the mesh refinement,and make the finite element solutions converge gradually to the exact *** primary-secondary field approach is used to improve the numerical accuracy of CSEM fields near the source point,where the primary field is calculated by using the quasi-analytical *** accuracy of this approach is verified by a one-dimensional *** 3-D models are used to demonstrate the effectiveness of the adaptive mesh refinement and the influences of dipping anisotropy layer on the marine CSEM responses for both inline and broadside *** complex synthetic model is simulated to show the capability and flexibility of the approach for geometrically complex situations.

关键词： marine CSEM general anisotropy vector-scalar potential unstructured mesh adaptive finite element

Food allergy and related risk factors in 2540 preschool children: an epidemiological survey in Guangdong Province, southern China

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World Journal of Pediatrics 2015年第3期11卷 219-225页

作者： Guang-Qiao Zeng Jia-ying luo Hui-Min Huang Pei-yan Zheng Wen-Ting luo Ni-Li Wei Bao-Qing Sun State Key Laboratory of Respiratory Disease National Clinical Research Center for Respiratory DiseasesGuangzhou Institute of Respiratory DiseasesFirst Affiliated HospitalGuangzhou Medical UniversityGuangzhouChina

Background:Although the number of studies on allergic diseases in the general population of southern China is increasing,only a few have addressed food allergy(FA)in children in this *** present study aimed to investigate the prevalence,clinical manifestations,spectrum of allergens,and related risk factors of FA in preschool children in Guangdong Province,southern ***:A random cluster-sampling method was used to select 24 kindergartens from 12 cities in Guangdong *** parents or guardians of the children were requested to complete a questionnaire on general information and data regarding FA diagnosis and symptoms in the children and their first-degree ***,the Chi-square test,multivariate regression analysis,and Spearman's rank-order correlation coefficient analysis were performed to identify statistically significant ***:Analysis of 2540 valid questionnaires revealed an FA prevalence rate of 4%.Adverse food reactions were due to the consumption of shrimp(4.4%),crab(3.2%),mango(2.3%),cow's milk and dairy products(1.9%),and eggs(1.4%).Logistic regression analysis indicated that a history of FA and a history of allergic rhinitis in the first-degree relatives were the major factors leading to FA in ***:The incidence of FA in children in Guangdong Province is higher than that commonly *** individual's genetic background is an important risk factor for ***,mitigation of the impact of lifestyle and environmental factors should be carefully considered to reduce the incidence of childhood FA.

关键词： allergic rhinitis eczema epidemiology food allergy questionnaire

A Design and I mplement ation of Secure Login System

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微计算机信息 2006年第4X期22卷 26-28,56页

作者： Cao Xiaojing luo Weiqi Center of Network Jnu University GuangZhou 510632China

According to the secure problems existing in the login system, a new secure scheme on login system is proposed. This scheme encryptedly transmits the input information after filtration and digestion so that it can eff... 详细信息

关键词：进入系统安全机制 ECC CA Java

Epiphytic zooplankton community profiles in a typical urban wetland as revealed by DNA metabarcoding

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Journal of Oceanology and Limnology 2024年第5期42卷 1571-1585页

作者： Diwen LIANG Chunrong HUANG Senjie LIN Jiahua DONG Mingyi LIANG Hailin luo State Environmental Protection Key Laboratory of Urban Ecological Simulation and Protection South China Institute of Environmental SciencesMinistry of Ecology and Environment of the People’s Republic of ChinaGuangzhou 510530China Department of Marine Sciences University of ConnecticutGrotonConnecticut 06340USA

Zooplankton,a crucial component of urban wetland,are one of the effective bioindicators for monitoring the feeding stocks of organisms at higher trophic levels and assessing the ecological quality of ***,information about the characteristics of epiphytic zooplankton community structure resulted from traditional methods is limited and hindered by the large amount of detritus and sludge attached to the *** investigated the epiphytic zooplankton communities associated with macrophytes(Vallisneria,Nymphaea,and Thalia dealbata)in a subtropical wetland using as DNA markers of the 18 S rRNA gene and the mitochondrial cytochrome c oxidase subunit I(COI)gene.A total of 241 OTUs of zooplankton were obtained from COI amplicons,including 194 OTUs of Rotifera,22 of Cladocera,and 25 of Copepoda,while only 62 OTUs of zooplankton were obtained from 18 S rDNA amplicons including 34 OTUs of Rotifera and 28 of *** zooplankton communities associated with the three macrophytes were similar,but they differed significantly from those in the open ***,there were no significant temporal differences among the zooplankton *** zooplankton communities were dominated by littoral zooplankton such as Testudinella,Lecane,and ***,especially littoral species,utilize macrophytes as food sources and as refuges against *** further led to an increase inαandβdiversity of zooplankton communities in urban *** result suggests that the joint use of multiple molecular markers could improve the taxonomic resolution and generate a comprehensive biodiversity profile of zooplankton.

关键词： environmental DNA metabarcoding diversity macrophyte cytochrome c oxidase subunit I(COI) 18 S rRNA

Constraints on the Ediacaran-Cambrian boundary in deep-water realm in South China: Evidence from zircon CA-ID-TIMS U-Pb ages from the topmost Liuchapo Formation

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Science China Earth Sciences 2020年第8期63卷 1176-1187页

作者： Wei WANG Mingzhong ZHOU Zhuyin CHU Junjie XU Chaofeng LI Taiyi luo Jinghui GUO State Key Laboratory of Lithospheric Evolution Institute of Geology and GeophysicsChinese Academy of SciencesBeijing 100029China University of Chinese Academy of Sciences Beijing 100049China Innovation Academy for Earth Science Chinese Academy of SciencesBeijing 100029China School of Geographical and Environmental Sciences Guizhou Normal UniversityGuiyang 550001China:China University of GeosciencesBeijing 100083China:State Key Laboratory of Ore Deposit GeochemistryInstitute of GeochemistryChinese Academy of SciencesGuiyang 550002China

The placement of the Ediacaran-Cambrian boundary in deep-water realm in South China and the high-precision temporal framework for the Ediacaran-Cambrian transition in this region have not yet been completely solved. Recently, we have found two K-bentonite beds in the top of the Liuchapo Formation at the Pingyin section, Guizhou Province. It provides an opportunity for constructing the temporal framework of the transitional strata on the yangtze Platform in South China and for determining the Ediacaran-Cambrian boundary in this area. In this study, we conducted high-precision CA-ID-TIMS U-Pb dating on zircons from the two K-bentonites. The ages of the two K-bentonites were precisely constrained at 536.40±0.47/1.1/1.2 Ma(2σ, n=7, MSWD=0.92) and 541.48±0.46/1.1/1.2 Ma(2σ, n=8, MSWD=1.3). Combining the geochronological results with organic carbon isotope data of chert in the topmost Liuchapo Formation from the section, we suggest that the EdiacaranCambrian boundary should be consistent with a significant negative organic carbon isotope excursion between the two Kbentonites. The scheme of the Ediacaran-Cambrian boundary in this study is of great significance for global correlation, and further for unravelling the information of the terminal Ediacaran-early Cambrian ocean.

关键词： Liuchapo Formation yangtze Platform Ediacaran-Cambrian CA-ID-TIMS Organic carbon isotope

Ni0.85 Se hexagonal nanosheets as an advanced conversion cathode for Mg secondary batteries

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Journal of Energy Chemistry 2020年第9期29卷 226-232,I0007页

作者： Dong Chen Jingwei Shen Xue Li Shun-an Cao Ting Li Wei luo Fei Xu Key Laboratory of Hydraulic Machinery Transients Ministry of EducationSchool of Power and Mechanical EngineeringWuhan UniversityWuhan 430072HubeiChina Key Laboratory of Catalysis and Materials Science of the State Ethnic Affairs Commission Ministry of EducationCollege of Chemistry and Materials ScienceSouth-Central University for NationalitiesWuhan 430074HubeiChina College of Chemistry and Molecular Sciences Wuhan UniversityWuhan 430072HubeiChina

Mg secondary batteries are promising scalable secondary batteries for next-generation energy ***,Mg-storage cathode materials are greatly demanded to construct high-performance Mg *** conversion reaction provides plenty of cathode options,and strategy for cathode selection and performance optimization is of special *** this work,Ni0.85Se with nanostructures of dispersive hexagonal nanosheets(D-Ni0.85Se)and flower-like assembled nanosheets(F-Ni0.85Se)is synthesized and investigated as Mg-storage *** with F-Ni0.85Se,D-Ni0.85Se delivers a higher specific capacity of 168 mAh g^-1 at 50 mA g^-1 as well as better rate performance,owing to its faster Mg^2+-diffusion and lower resistance.D-Ni0.85Se also exhibits a superior cycling stability over *** investigation on mechanism indicates an evolution of Ni0.85Se towards NiSe with cycling,and the Mg-storage reaction occurs between NiSe and metallic Ni^*** present work demonstrates that advanced conversion-type Mg battery cathode materials could be constructed by soft selenide anions,and the electrochemical properties could be manipulated by rational material morphology optimization.

关键词： Mg secondary batteries Electrochemical conversion reaction Ni0.85Se Hexagonal nanosheets Diffusion kinetics