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Design and Implementation of Nonlinear Precoding for MIMO-SDMA Toward 6G Wireless

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China Communications 2024年第1期21卷 69-87页

作者： Chaowu wu Yue Xiao shu Fang Gang wu National Key Laboratory of Wireless Communications University of Electronic Science and Technology of ChinaChengdu 611731China

In this paper,we present a novel and robust nonlinear precoding(NLP)design and detection structure specifically tailored for multiple-input multipleoutput space division multiple access(MIMO-SDMA)systems toward 6G *** approach aims to effectively mitigate the impact of imperfect channel estimation by leveraging the channel fluctuation mean square error(MSE)for reconstructing a highly accurate precoding matrix at the ***,we introduce a simplified receiver structure that eliminates the need for equalization,resulting in reduced interference and notable enhancements in overall system *** conduct both computer simulations and experimental tests to validate the efficacy of our proposed *** results reveals that the proposed NLP scheme offers significant performance improvements,making it particularly well-suited for the forthcoming 6G wireless.

关键词： MIMO-SDMA nonlinear precoding Tomlinson-Harashima precoding(THP) vector perturbation(VP)

An improved bound on accelerated light dark matter

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Science China(Physics,Mechanics & Astronomy) 2024年第2期67卷 105-118页

作者： Liangliang Su Lei wu bin Zhu Department of Physics and Institute of Theoretical Physics Nanjing Normal UniversityNanjing 210023China School of Physics Yantai UniversityYantai 264005China

Light(sub-GeV)dark matter has gained increasing interest in terms of direct *** dark matter is a promising candidate that can generate detectable nuclear recoil energy within the sub-GeV *** of the large kinetic energy,its interactions with the nucleus are predominantly governed by inelastic scattering,including quasi-elastic and deep inelastic *** this work,we calculated the inelastic effects in dark matter-Earth scattering mediated by a vector *** analysis revealed that the impact of inelastic scattering relies on the mediator mass and the kinetic energy spectrum of dark *** results exhibited considerable disparity:the upper bounds of the exclusion limit for the spin-independent cross-section between accelerated dark matter and nuclei via a heavy mediator differ by several tens of times when inelastic scattering is considered.

关键词： accelerated dark matter inelastic scattering direct detection experiment

α-O-4型木质素二聚体热解行为的理论研究

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华南理工大学学报（自然科学版） 2015年第6期43卷 22-29,36页

作者：武书彬刘超邓裕斌华南理工大学制浆造纸工程国家重点实验室广东广州510640

为揭示热解过程中木质素中α-O-4连接键的解聚机理,运用密度泛函理论模拟了α-O-4型木质素二聚体模化物苯酚基甘油-α-苯基醚在773 K、101 k Pa条件下的热解行为.通过对各步反应热力学焓变的计算,明确了二聚体的初次裂解是Cα—O键和Cα... 详细信息

为揭示热解过程中木质素中α-O-4连接键的解聚机理,运用密度泛函理论模拟了α-O-4型木质素二聚体模化物苯酚基甘油-α-苯基醚在773 K、101 k Pa条件下的热解行为.通过对各步反应热力学焓变的计算,明确了二聚体的初次裂解是Cα—O键和Cα—Cβ键的断裂.根据热力学可能性,将二聚体的后续裂解设计成不同的路径,热解的最终产物有小分子化合物(甲醇、乙醇、乙二醇和环氧乙烷)、苯酚及其对位取代物(对甲基苯酚、对乙基苯酚和对羟基苯甲醇)、苯及其取代物(苯甲醇),酚类产物中较优先的是对甲基苯酚、对乙基苯酚,其次是苯酚.此外,还将α-O-4型二聚体的热解行为与β-O-4型二聚体进行了比较,发现其不同均源于两者结构的差异.

关键词：木质素二聚体热解密度泛函理论 α-O-4连接键

Cerebral Metabolic Profiling of Hypothermic Circulatory Arrest with and Without Antegrade Selective Cerebral Perfusion： Evidence from Nontargeted Tissue Metabolomics in a Rabbit Model

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Chinese Medical Journal 2016年第6期129卷 702-708页

作者： Li-Hua Zou Jin-Ping Liu Hao Zhang shu-bin wu bing-Yang Ji Department of Cardiopulmonary Bypass Fuwai Hospital and National Center for Cardiovascular Diseases Chinese Academy of Medical Sciences Peking Union Medical College Beijing 100037 China Department of Surgery and Center for Pediatric Cardiac Surgery Fuwai Hospital and National Center for Cardiovascular Diseases Chinese Academy of Medical Sciences Peking Union Medical College Beijing 100037 China

Background： Antegrade selective cerebral perfusion （ASCP） is regarded to perform cerebral protection during the thoracic aorta surgery as an adjunctive technique to deep hypothermic circulatory arrest （DHCA）. However, brain metabolism profile after ASCP has not been systematically investigated by metabolomics technology. Methods： To clarify the metabolomics profiling of ASCP, 12 New Zealand white rabbits were randomly assigned into 60 min DHCA with （DHCA＋ASCP [DA] group, n = 6） and without （ DHCA [D] group, n = 6） ASCP according to the random number table. ASCP was conducted by cannulation on the right subclavian artery and cross-clamping of the innominate artery. Rabbits were sacrificed 60 min after weaning off cardiopulmonary bypass. The metabolic features of the cerebral cortex were analyzed by a nontargeted metabolic profiling strategy based on gas chromatography-mass spectrometry. Variable importance projection values exceeding 1.0 were selected as potentially changed metabolites, and then Student＇s t-test was applied to test for statistical significance between the two groups. Results： Metabolic profiling of brain was distinctive significantly between the two groups （Q2y = 0.88 for partial least squares-DA model）. In comparing to group D, 62 definable metabolites were varied significantly after ASCP, which were mainly related to amino acid metabolism, carbohydrate metabolism, and lipid metabolism. Kyoto Encyclopedia of Genes and Genomes analysis revealed that metabolic pathways after DHCA with ASCP were mainly involved in the activated glycolytic pathway, subdued anaerobic metabolism, and oxidative stress. In addition, L-kynurenine （P = 0.0019）, 5-methoxyindole-3-acetic acid （P = 0.0499）, and 5-hydroxyindole-3-acetic acid （P = 0.0495） in tryptophan metabolism pathways were decreased, and citrulline （P - 0.0158） in urea cycle was increased in group DA comparing to group D. Conclusions： The present study applied metabolomics analysis to identify the cerebral met

关键词： Antegrade Selective Cerebral Perfusion Cardiopulmonary Bypass Metabolic Profiling Metabolomics

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澳门大众体育公共服务目标研究

西安体育学院学报 2009年第4期26卷 406-409,451页

作者：吴树斌澳门理工学院澳门999078

研究认为,澳门的大众体育公共服务体系应实行社会化管理模式,政府通过委托管理方式,由体育委员会对大众体育公共服务进行专业化管理。在社区建立相应的体育服务组织,统筹管理区域性体育服务工作。各类体育服务组织按规定申请服务许可并... 详细信息

研究认为,澳门的大众体育公共服务体系应实行社会化管理模式,政府通过委托管理方式,由体育委员会对大众体育公共服务进行专业化管理。在社区建立相应的体育服务组织,统筹管理区域性体育服务工作。各类体育服务组织按规定申请服务许可并签定服务合同,实施服务行为。

关键词：大众体育公共服务目标澳门

硫酸盐法制浆黑液中主要有机组分的热解特性研究

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燃料化学学报 2013年第2期41卷 169-176页

作者：戴涛武书彬郭大亮华南理工大学制浆造纸工程国家重点实验室广东广州510640 中国科学院广州能源研究所可再生能源与天然气水合物重点实验室广东广州510640

采用管式炉对硫酸盐法竹子、阔叶木混合制浆黑液固形物(BLS)及其三种主要组分碱木素(AL)、多糖(PLS)和木素-碳水化合物复合体(LCC),在400～800℃进行热解,全面分析了各相热解产物组成与分布规律。结果表明,BLS及其三种主要组分的热解产... 详细信息

采用管式炉对硫酸盐法竹子、阔叶木混合制浆黑液固形物(BLS)及其三种主要组分碱木素(AL)、多糖(PLS)和木素-碳水化合物复合体(LCC),在400～800℃进行热解,全面分析了各相热解产物组成与分布规律。结果表明,BLS及其三种主要组分的热解产物组成与分布规律存在明显差异。AL、PLS和LCC对BLS热解产生H2和CO的产率影响不大,PLS热解生成CO2的能力明显高于BLS、AL和LCC。BLS热解液相产物中的酚类和醚类主要是来自AL和LCC;酮类和酸类是由AL、PLS和LCC共同贡献的。BLS、AL、PLS和LCC热解半焦表面形貌存在明显差异。在BLS热解过程中,AL、PLS和LCC会相互影响、相互制约,共同决定着BLS的热解特性。

关键词：黑液碱木质素多糖木素-碳水化合物复合体热解

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基于热重红外的硫酸盐法黑液热解特性分析

林产化学与工业 2014年第3期34卷 22-26页

作者：刘超武书彬戴涛华南理工大学制浆造纸工程国家重点实验室广东广州510640

为了深入地探讨黑液热解的反应机理以及黑液热解过程中产物的释放规律,采用热重-红外联用（ TG-FT-IR）技术对竹子和桉木混合硫酸盐法制浆黑液固形物（ BLS）的热裂解过程进行了研究。 TG-FT-IR结果显示,BLS热解产物的释放主要集中在500... 详细信息

为了深入地探讨黑液热解的反应机理以及黑液热解过程中产物的释放规律,采用热重-红外联用（ TG-FT-IR）技术对竹子和桉木混合硫酸盐法制浆黑液固形物（ BLS）的热裂解过程进行了研究。 TG-FT-IR结果显示,BLS热解产物的释放主要集中在500~2000 s,热解产物主要是 CO2、CH4、H2O、CO、醇酚类化合物和醛酮类化合物。 BLS的整个热解过程可分为3个阶段,第1阶段的失重主要是原料中结合水的挥发引起的,此阶段的最大失重速率出现在105℃；第2失重阶段主要发生在173~518℃,失重率约为25.19%,主要产物是CO2、CH4、H2O、醇酚类化合物、醛酮类化合物以及少量的CO,此阶段CO2的生成量最大；第3阶段主要发生在722~1000℃,失重率接近39.05%,产物主要是CO,其它小分子产物的产率都很低。

关键词：硫酸盐法黑液热解热重红外

Mechanism Design for Ancillary Service Market Considering Social Welfare and Fairness

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CSEE Journal of Power and Energy Systems 2024年第3期10卷 1000-1010页

作者： Zhi wu Yuanxi wu Wei Gu Zheng Xu shu Zheng Jingtao Zhao School of Electrical Engineering Southeast UniversityNanjing 210096China NARI Technology Co. Ltd.Nanjing 211106China IEEE CSEE

Increasing penetration of distributed energy resources in the distribution network(DN)is threatening safe operation of the DN,which necessitates setup of the ancillary service market in the *** the ancillary service market,distribution system operator(DSO)is responsible for safety of the DN by procuring available capacities of *** existing studies,this paper proposes a novel market mechanism composed of two parts:choice rule and payment *** proposed choice rule simultaneously considers social welfare and fairness,encouraging risk-averse aggregators to participate in the ancillary service *** is then formulated as a linear programming problem,and a distributed solution using the multi-cut Benders decomposition is ***,successful implementation of the choice rule depends on each aggregator’s truthful adoption of private ***,a payment rule is also designed,which is proved to possess two properties:incentive compatibility and individual *** results demonstrate effectiveness of the proposed choice rule on improving fairness and verify properties of the payment rule.

关键词： Aggregator ancillary service market distributed mechanism fairness mechanism design

Contrastive Consistency and Attentive Complementarity for Deep Multi-View Subspace Clustering

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Computers, Materials & Continua 2024年第4期79卷 143-160页

作者： Jiao Wang bin wu Hongying Zhang School of Information Engineering Southwest University of Science and TechnologyMianyang621010China

Deep multi-view subspace clustering (DMVSC) based on self-expression has attracted increasing attention dueto its outstanding performance and nonlinear application. However, most existing methods neglect that viewprivatemeaningless information or noise may interfere with the learning of self-expression, which may lead to thedegeneration of clustering performance. In this paper, we propose a novel framework of Contrastive Consistencyand Attentive Complementarity (CCAC) for DMVsSC. CCAC aligns all the self-expressions of multiple viewsand fuses them based on their discrimination, so that it can effectively explore consistent and complementaryinformation for achieving precise clustering. Specifically, the view-specific self-expression is learned by a selfexpressionlayer embedded into the auto-encoder network for each view. To guarantee consistency across views andreduce the effect of view-private information or noise, we align all the view-specific self-expressions by contrastivelearning. The aligned self-expressions are assigned adaptive weights by channel attention mechanism according totheir discrimination. Then they are fused by convolution kernel to obtain consensus self-expression withmaximumcomplementarity ofmultiple views. Extensive experimental results on four benchmark datasets and one large-scaledataset of the CCAC method outperformother state-of-the-artmethods, demonstrating its clustering effectiveness.

关键词： Deep multi-view subspace clustering contrastive learning adaptive fusion self-expression learning