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arXiv 2023年

作者： Wu, Wen Cheng, Nan Zhang, Ning Yang, Peng Aldubaikhy, Khalid Shen, Xuemin The Department of Electrical and Computer Engineering University of Waterloo WaterlooONN2L 3G1 Canada State Key Lab. of ISN The School of Telecommunications Engineering Xidian University Xian710071 China The Department of Computing Sciences Texas A&M University Corpus ChristiTX78412 United States The School of Electronic Information and Communications Huazhong University of Science and Technology Wuhan430074 China The Department of Electrical Engineering Qassim University Buraydah52571 Saudi Arabia

Beamforming (BF) training is crucial to establishing reliable millimeter-wave communication connections between stations (STAs) and an access point. In IEEE 802.11ad BF training protocol, all STAs contend for limited BF training opportunities, i.e., associated BF training (A-BFT) slots, which results in severe collisions and significant BF training latency, especially in dense user scenarios. In this paper, we first develop an analytical model to evaluate the BF training protocol performance. Our analytical model accounts for various protocol components, including user density, the number of A-BFT slots, and protocol parameters, i.e., retry limit and contention window size. We then derive the average successful BF training probability, the BF training efficiency and latency. Since the derived BF training efficiency is an implicit function, to reveal the relationship between system parameters and BF training performance, we also derive an approximate expression of BF training efficiency. Theoretical analysis indicates that the BF training efficiency degrades drastically in dense user scenarios. To address this issue, we propose an enhancement scheme which adaptively adjusts the protocol parameters in tune with user density, to improve the BF training performance in dense user scenarios. Extensive simulations are carried out to validate the accuracy of the developed analytical model. In addition, simulation results show that the proposed enhancement scheme can improve the BF training efficiency by 35% in dense user scenarios. © 2023, CC BY-NC-SA.

关键词： Analytical models

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Wenwang: Toward Effectively Generating Code Beyond Standalone Functions via Generative Pre-trained Models

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ACM Transactions on Software Engineering and Methodology 1000年

作者： Hao Yu Bo Shen Jiaxin Zhang Shaoxin Lin Lin Li Guangtai Liang Ying Li Qianxiang Wang Tao Xie The Hong Kong University of Science and Technology China Huawei Cloud Computing Technologies Co. Ltd. China Huawei Noah’s Ark Lab China National Research Center of Software Engineering Peking University China Key Lab of HCST (PKU) MOE SCS Peking University China

Code generation models based on the pre-training and fine-tuning paradigm have been increasingly attempted by both academia and industry, resulting in well-known industrial models such as Codex, CodeGen, and PanGu-Coder. After being pre-trained on a large-scale corpus of code, a model is further fine-tuned with datasets specifically for the target downstream task, e.g., generating code from natural language description. The target code being generated can be classified into two types: a standalone function, i.e., a function that invokes or accesses only built-in functions and standard libraries, and a non-standalone function, i.e., a function that invokes or accesses user-defined functions or third-party *** effectively generate code especially non-standalone functions (largely ignored by existing work), in this article, we present Wenwang, an approach to improving the capability of a pre-trained model on generating code beyond standalone functions. Wenwang consists of two components: a fine-tuning dataset named WenwangData and a fine-tuned model named WenwangCoder. Compared with existing fine-tuning datasets, WenwangData additionally covers non-standalone functions. Besides the docstring and code snippet for a function, WenwangData also includes its contextual information collected via program analysis. Based on PanGu-Coder, we produce WenwangCoder by fine-tuning PanGu-Coder on WenwangData with our context-aware fine-tuning technique so that the contextual information can be fully leveraged during code generation. On CoderEval and HumanEval, WenwangCoder outperforms three state-of-the-art models with similar parameter sizes (at the scale of around 300M), namely CodeGen, PanGu-Coder, and PanGu-FT. Although WenwangCoder does not outperform ChatGPT on HumanEval, WenwangCoder with smaller model parameter sizes can achieve similar effects to ChatGPT on CoderEval. Our experimental results also shed light on a number of promising optimization directions based on

关键词： Code Generation Pre-trained Language Models Fine-tuning Dataset

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Social sensing enhanced time estimation for bus service

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Concurrency and Computation: Practice and Experience 2015年第15期27卷

作者： Jin Liu Juan Li Xiaohui Cui Xiaoguang Niu Xiaoping Sun Jing Zhou State Key Lab. of Software Engineering Computer School Wuhan University Wuhan China Guangxi Key Laboratory of Trusted Software Guilin University of Electronic Technology Guilin China International School of Software Wuhan University Wuhan China Computer School Wuhan University Wuhan China Key Lab of Intelligent Information Processing Institute of Computing Technology CAS Beijing China School of Computer Science Communication University of China China

The precise prediction of bus routes or the arrival time of buses for a traveler can enhance the quality of bus service. However, many social factors influence people's preferences for taking buses. These social factors may include heavy traffic cost, traffic congestion, poor air quality and so forth. Existing prediction techniques rarely consider social sensing when predicting the bus arrival time. Accordingly, this paper proposes a social sensing enhanced service for predicting bus routes, which integrates sensing ability and social networks to understand and measure the influence between social events and vehicle velocity. We focus on the analysis of two different attributions: PT service quality attributions PEA s and road condition attributions PRCA s. Both of them synthesize the social sensing in their evaluation of bus routes. PEA represents individual preferences and PRCA represents physical factors that significantly influence vehicle velocity. Bus relevant social events were further categorized into PEA events or PRCA events. PEA s of buses were scored according to the tendency of bus conditions reflected in social events. Furthermore, an artificial neural network prediction model is established to estimate the bus travel time. Copyright © 2015 John Wiley & Sons, Ltd.

关键词： social sensing in-time bus service bus route arrival time estimation

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Corrigendum to “Fast and scalab.e lock methods for video coding on many-core architecture” [J. Vis. Commun. Image R. 25(7) (2014) 1758–1762]

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Journal of Visual Communication and Image Representation 2015年 27卷 57-57页

作者： Weizhi Xu Hui Yu Dianjie Lu Fenglong Song Da Wang Xiaochun Ye Songwei Pei Dongrui Fan Hongtao Xie Institute of Microelectronics Tsinghua University Beijing China State Key Laboratory of Computer Architecture Institute of Computing Technology Chinese Academy of Sciences Beijing China Key Lab. of Intelligent Information Processing Institute of Computing Technology Chinese Academy of Sciences Beijing China School of Information Science and Engineering Shandong Normal University Jinan China Department of Computer Science and Technology Beijing University of Chemical Technology Beijing China Institute of Information Engineering Chinese Academy of Sciences National Engineering Laboratory for Information Security Technologies Beijing China

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Corrigendum to “Fast and scalab.e lock methods for video coding on many-core architecture” [J. Vis. Commun. 25 (7) (2014) 1758–1762]

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Journal of Visual Communication and Image Representation 2015年 26卷 350-350页

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面向微博的情感影响最大化模型

面向微博的情感影响最大化模型

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第29届中国数据库学术会议

作者： OU Gaoyan 欧高炎 CHEN Wei 陈薇 WANG Tengjiao 王腾蛟 LEI Kai 雷凯 YANG Dongqing 杨冬青 Key Laboratory of High Confidence Software Technologies Ministry of Education Beijing 100871 Chin 高可信软件技术教育部重点实验室北京100871 北京大学信息科学技术学院北京100871 The Shenzhen Key Lab for Cloud Computing Technology and Applications Shenzhen Graduate School Peki 北京大学深圳研究生院深圳市云计算关键技术与应用重点实验室广东深圳518055

社交网络中影响最大化问题是寻找具有最大影响范围的节点。影响最大化的大部分求解算法仅仅依赖社交网络图。基于微博的转发关系树和微博内容的情感倾向性,以及用户的社交网络图,提出了一个能够刻画用户情感影响的情感影响最大化模型—... 详细信息

社交网络中影响最大化问题是寻找具有最大影响范围的节点。影响最大化的大部分求解算法仅仅依赖社交网络图。基于微博的转发关系树和微博内容的情感倾向性,以及用户的社交网络图,提出了一个能够刻画用户情感影响的情感影响最大化模型——情感影响分配模型(SID),证明了SID模型下的情感影响最大化问题是一个NP难问题,给出了一个具有精度保证的贪心算法。在真实的微博数据上的实验结果表明,SID模型能够有效地找出情感影响最大化的节点集,同时具有很高的扩展性。

关键词：社交网络情感分析信息传播模型分配算法

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XML模式匹配:整体连接算法TurboStack

XML模式匹配:整体连接算法TurboStack

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第29届中国数据库学术会议

作者： Guo Shaosong 郭少松 Bao Xiaoyuan 包小源 Chen Wei 陈薇 Wang Tengjiao 王腾蛟 Lei Kai 雷凯 Yang Dongqing 杨冬青 Key Laboratory of High Confidence Software Technologies(Ministry of Education) School of EECS Peki 高可信软件技术教育部重点实验室北京大学信息科学技术学院北京 100871 School of EECS Peking University Beijing 100871 北京大学信息科学技术学院北京 100871 The Shenzhen Key Lab for Cloud Computing Technology and Applications(SPCCTA) Peking University Shen 深圳市云计算关键技术与应用重点实验室(SPCCTA) 北京大学深圳研究生院

含谓词的XPath查询为小枝查询(twig query),它是XQuery最基本的查询模式。小枝查询算法有两大类：小枝分解和整体小枝连接,其中TwigStack系列算法处理小枝查询的效率是最优的,但其缺点在于不支持Twig Query中含“OR”以及通配符“*”的... 详细信息

含谓词的XPath查询为小枝查询(twig query),它是XQuery最基本的查询模式。小枝查询算法有两大类：小枝分解和整体小枝连接,其中TwigStack系列算法处理小枝查询的效率是最优的,但其缺点在于不支持Twig Query中含“OR”以及通配符“*”的查询;在大型商业数据库管理系统中,TurboXPath是DB2用于处理小枝查询的基本算法,它对XPath的支持较全面,但由于TurboXPath是针对XML数据流查询处理设计的,因而对数据库中Native存储的XML数据的查询处理效率较低;针对已有方法的不足,设计了一种纯XML存储方式,以DDE编码为基础,提出了TurboStack算法,并通过大量实验验证了该方法的有效性。

关键词：可扩展标记语言数据模式匹配整体连接算法信息查询

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25th Annual Computational Neuroscience Meeting CNS-2016, Seogwipo City, South Korea, July 2-7, 2016 Abstracts

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BMC NEUROSCIENCE 2016年第Sup1期17卷 54-54页

作者： [Anonymous] Computational Neurobiology Laboratory The Salk Institute for Biological Studies San Diego CA USA UNIC CNRS Gif sur Yvette France The European Institute for Theoretical Neuroscience (EITN) Paris France ATR Computational Neuroscience Laboratories 2-2 Hikaridai Seika-cho Soraku-gun Kyoto 619-0288 Japan Krembil Research Institute University Health Network Toronto ON M5T 2S8 Canada Department of Physiology University of Toronto Toronto ON M5S 1A8 Canada Department of Medicine (Neurology) University of Toronto Toronto ON M5T 2S8 Canada Department of Neurophysiology Nencki Institute of Experimental Biology Warsaw Poland Department of Theory Wigner Research Centre for Physics of the Hungarian Academy of Sciences Budapest 1121 Hungary Department of Mathematical Sciences KAIST Daejoen 34141 Republic of Korea Department of Mathematics University of Houston Houston TX 77004 USA Department of Biochemistry & Cell Biology and Institute of Biosciences and Bioengineering Rice University Houston TX 77005 USA Department of Biology and Biochemistry University of Houston Houston TX 77004 USA Grupo de Neurocomputación Biológica Dpto. de Ingeniería Informática Escuela Politécnica Superior Universidad Autónoma de Madrid Madrid Spain Department of Biological Sciences University of Southern California Los Angeles CA USA Center for Neuroscience Korea Institute of Science and Technology Hwarang-ro 14-gil 5 Seongbuk-gu Seoul 02792 South Korea Department of Neuroscience University of Science and Technology 217 Gajeong-ro Yuseong-gu Daejon 34113 South Korea Department of Psychology Yonsei University 50 Yonsei-ro Seodaemun-gu Seoul 03722 South Korea Department of Psychiatry Kyung Hee University Hospital at Gangdong 892 Dongnam-ro Gangdong-gu Seoul 05278 South Korea Department of Psychiatry Veterans Administration Boston Healthcare System and Harvard Medical School Brockton MA 02301 USA Center for Neural Science New York University New York NY 10003 USA Courant Institute

A1 Functional advantages of cell-type heterogeneity in neural circuits Tatyana O. Sharpee A2 Mesoscopic modeling of propagating waves in visual cortex Alain Destexhe A3 Dynamics and biomarkers of mental disorders Mitsuo Kawato F1 Precise recruitment of spiking output at theta frequencies requires dendritic h-channels in multi-compartment models of oriens-lacunosum/moleculare hippocampal interneurons Vladislav Sekulić, Frances K. Skinner F2 Kernel methods in reconstruction of current sources from extracellular potentials for single cells and the whole brains Daniel K. Wójcik, Chaitanya Chintaluri, Dorottya Cserpán, Zoltán Somogyvári F3 The synchronized periods depend on intracellular transcriptional repression mechanisms in circadian clocks. Jae Kyoung Kim, Zachary P. Kilpatrick, Matthew R. Bennett, Kresimir Josić O1 Assessing irregularity and coordination of spiking-bursting rhythms in central pattern generators Irene Elices, David Arroyo, Rafael Levi, Francisco B. Rodriguez, Pablo Varona O2 Regulation of top-down processing by cortically-projecting parvalbumin positive neurons in basal forebrain Eunjin Hwang, Bowon Kim, Hio-Been Han, Tae Kim, James T. McKenna, Ritchie E. Brown, Robert W. McCarley, Jee Hyun Choi O3 Modeling auditory stream segregation, build-up and bistability James Rankin, Pamela Osborn Popp, John Rinzel O4 Strong competition between tonotopic neural ensembles explains pitch-related dynamics of auditory cortex evoked fields Alejandro Tabas, André Rupp, Emili Balaguer-Ballester O5 A simple model of retinal response to multi-electrode stimulation Matias I. Maturana, David B. Grayden, Shaun L. Cloherty, Tatiana Kameneva, Michael R. Ibbotson, Hamish Meffin O6 Noise correlations in V4 area correlate with behavioral performance in visual discrimination task Veronika Koren, Timm Lochmann, Valentin Dragoi, Klaus Obermayer O7 Input-location dependent gain modulation in cerebellar nucleus neurons Maria Psarrou, Maria Schilstra, Neil Davey, Benjamin Torben-Ni

关键词： NEUROSCIENCES PATHOLOGICAL psychology DENDRITES

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26th Annual Computational Neuroscience Meeting (CNS*2017): Part 3 Antwerp, Belgium. 15-20 July 2017 Abstracts

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BMC NEUROSCIENCE 2017年第Sup1期18卷 95-176页

作者： [Anonymous] Department of Neuroscience Yale University New Haven CT 06520 USA Department Physiology & Pharmacology SUNY Downstate Brooklyn NY 11203 USA NYU School of Engineering 6 MetroTech Center Brooklyn NY 11201 USA Kings County Hospital Center Brooklyn NY 11203 USA Departament de Matemàtica Aplicada Universitat Politècnica de Catalunya Barcelona 08028 Spain Institut de Neurobiologie de la Méditerrannée (INMED) INSERM UMR901 Aix-Marseille Univ Marseille France Center of Neural Science New York University New York NY USA Aix-Marseille Univ INSERM INS Inst Neurosci Syst Marseille France Laboratoire de Physique Théorique et Modélisation CNRS UMR 8089 Université de Cergy-Pontoise 95300 Cergy-Pontoise Cedex France Department of Mathematics and Computer Science ENSAT Abdelmalek Essaadi’s University Tangier Morocco Laboratory of Natural Computation Department of Information and Electrical Engineering and Applied Mathematics University of Salerno 84084 Fisciano SA Italy Department of Medicine University of Salerno 84083 Lancusi SA Italy Dipartimento di Fisica Università degli Studi Aldo Moro Bari and INFN Sezione Di Bari Italy Data Analysis Department Ghent University Ghent Belgium Coma Science Group University of Liège Liège Belgium Cruces Hospital and Ikerbasque Research Center Bilbao Spain BIOtech Department of Industrial Engineering University of Trento and IRCS-PAT FBK 38010 Trento Italy Department of Data Analysis Ghent University Ghent 9000 Belgium The Wellcome Trust Centre for Neuroimaging University College London London WC1N 3BG UK Department of Electronic Engineering NED University of Engineering and Technology Karachi Pakistan Blue Brain Project École Polytechnique Fédérale de Lausanne Lausanne Switzerland Departement of Mathematics Swansea University Swansea Wales UK Laboratory for Topology and Neuroscience at the Brain Mind Institute École polytechnique fédérale de Lausanne Lausanne Switzerland Institute of Mathematics

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