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Robust multiuser MIMO scheduling algorithms with imperfect CSI

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Science china(Information Sciences) 2012年第4期55卷 815-826页

作者： MAO Junling 1,3,GAO JinChun 1,3,lIU YuanAn 1,3,XIE Gang 2,3 & zhang Jian 1,3 1 school of electronic engineering,beijing university of posts and telecommunications,beijing 100876,china 2 school of Information and Communication engineering,beijing university of posts and telecommunications,beijing 100876,china 3 Key lab of Universal Wireless Communications,Ministry of Education,beijing university of posts and telecommunications,beijing 100876,china school of electronic engineering Beijing University of Posts and Telecommunications Beijing China Key lab of Universal Wireless Communications Ministry of Education Beijing University of Posts and Telecommunications Beijing China school of Information and Communication engineering Beijing University of Posts and Telecommunications Beijing China

Robust multiuser multiple-input-multiple-output (MIMO) scheduling algorithms are proposed in this *** imperfect channel state information (CSI),traditional scheduling algorithms for the multiuser MIMO system based on the zero forcing precoding scheme will lose some performance due to the multi-user interference (MUI).In order to improve the system average throughput,we study the robust multiuser MIMO scheduling problem with imperfect *** the average capacity formula,we derive a robust factor which can transform the robust multiuser MIMO scheduling problem into the traditional one,thus most existing non-robust scheduling algorithms can be robust if this factor is *** results show that compared with the traditional algorithms,the proposed robust algorithms can improve the system average throughput significantly under the CSI error environment.

关键词： multiuser MIMO (MU-MIMO) scheduling robust imperfect CSI

Research on intelligent search-and-secure technology in accelerator hazardous areas based on machine vision

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Nuclear Science and Techniques 2024年第4期35卷 96-107页

作者： ying-lin Ma Yao Wang hong-Mei Shi Hui-Jie zhang school of Traffic and Transportation Beijing Jiaotong UniversityBeijing 100044China school of Mechanical Electronic and Control EngineeringBeijing Jiaotong UniversityBeijing 100044China Institute of High Energy Physics Chinese Academy of SciencesBeijing 100049China

Prompt radiation emitted during accelerator operation poses a significant health risk,necessitating a thorough search and securing of hazardous areas prior to ***,manual sweep methods are ***,the limitations of manual sweeps have become increasingly evident with the implementation of large-scale *** leveraging advancements in machine vision technology,the automatic identification of stranded personnel in controlled areas through camera imagery presents a viable solution for efficient search and *** the criticality of personal safety for stranded individuals,search and security processes must be sufficiently *** ensure comprehensive coverage,180°camera groups were strategically positioned on both sides of the accelerator tunnel to eliminate blind spots within the monitoring *** YOlOV8 network model was modified to enable the detection of small targets,such as hands and feet,as well as larger targets formed by individuals near the ***,the system incorporates a pedestrian recognition model that detects human body parts,and an information fusion strategy is used to integrate the detected head,hands,and feet with the identified pedestrians as a cohesive *** strategy enhanced the capability of the model to identify pedestrians obstructed by equipment,resulting in a notable improvement in the recall ***,recall rates of 0.915 and 0.82were obtained for Datasets 1 and 2,*** there was a slight decrease in accuracy,it aligned with the intended purpose of the search-and-secure software *** tests conducted within an accelerator tunnel demonstrated the effectiveness of this approach in achieving reliable recognition outcomes.

关键词： Search and secure Machine vision Camera Human body parts recognition Particle accelerator Hazardous area

Heterointerface engineering of rhombic Rh nanosheets confined on MXene for efficient methanol oxidation

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Journal of Energy Chemistry 2024年第6期93卷 419-428,I0011页

作者： Qi zhang Quanguo Jiang Xiang yang Chi zhang Jian zhang lu yang Haiyan He Guobing ying huajie huang College of Materials Science and engineering Hohai UniversityNanjing 210098JiangsuChina New Energy Technology engineering lab of Jiangsu Province College of ScienceNanjing University of Posts&Telecommunications(NUPT)Nanjing 210023JiangsuChina school of Materials Science and engineering Southeast UniversityNanjing 211100JiangsuChina

Although metallic rhodium(Rh)is regarded as a promising platinum-alternative anode catalyst of direct methanol fuel cell(DMFC),the conventional"particle-to-face"contact model between Rh and matrix largely limits the overall electrocatalytic performance due to their insufficient cooperative ***,we report a controllable and robust heterointerface engineering strategy for the bottom-up fabrication of rhombic Rh nanosheets in situ confined on Ti_3C_(2)T_x MXene nanolamellas(Rh NS/MXene)via a convenient stereoassembly *** unique design concept gives the resulting 2D/2D Rh NS/MXene heterostructure intriguing textural features,including large accessible surface areas,strong"face-toface"interfacial interactions,homogeneous Rh nanosheet distribution,ameliorative electronic structure,and high electronic *** a consequence,the as-prepared Rh NS/MXene nanoarchitectures exhibit exceptional electrocatalytic methanol oxidation properties in terms of a large electrochemically active surface area of 126.2 m~2 g_(Rh)~(-1),a high mass activity of 1056.9 mA mg_(Rh)-~1,and a long service life,which significantly outperform those of conventional particle-shaped Rh catalysts supported by carbon black,carbon nanotubes,reduced graphene oxide,and MXene matrixes as well as the commercial Pt nanoparticle/carbon black and Pd nanoparticle/carbon black catalysts with the same noble metal loading *** functional theory calculations further demonstrate that the direct electronic interaction at the well-contacted 2D/2D heterointerfaces effectively enhances the adsorption energy of Rh nanosheets and induces a left shift of the d-band center,thereby making the Rh NS/MXene configuration suffer less from CO *** work highlights the importance of rational heterointerface design in the construction of advanced noble metal/MXene electrocatalysts,which may provide new avenues for developing the next-generation DMFC devices.

关键词： Rhodium nanosheet Ti_(3)C_(2)T_(x)MXene Heterointerface Electrocatalyst Fuel cell

Wide temperature range,air stable,transparent,and self-powered photodetectors enabled by a hybrid film of graphene and singlewalled carbon nanotubes

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Nano Research 2024年第7期17卷 6582-6593页

作者： ying Yue Di zhang Pengyu Wang xin Wu Yuejuan zhang Yanchun Wang Xiao zhang Xiaojun Wei huaping liu Weiya Zhou beijing National laboratory for Condensed Matter Physics and Institute of PhysicsChinese Academy of SciencesBeijing 100190China school of Physical Sciences and College of Materials Science and Optoelectronic Technology University of Chinese Academy of SciencesBeijing 100049China Songshan lake Materials laboratory Dongguan 523808China beijing Key laboratory for Advanced Functional Materials and Structure Research Beijing 100190China

Transparent photovoltaic devices(TPVDs)have attracted increasing attention in emerging electronic *** the application scenarios extend,there raise higher requirements regarding the stability and operating temperature range of *** this work,a unique preparation strategy is proposed for air stable TPVD with a wide operating temperature range,i.e.,a nanoscale architecture termed as H-TPVD is constructed that integrates a free-standing and highly transparent conductive hybrid film of graphene and single-walled carbon nanotubes(G-SWNT TCF for short)with a metal oxide NiO/TiO_(2)*** preparation approach is suitable for scaling *** to the excellent transparent conductivity of the freestanding G-SWNT hybrid film and the ultrathin NiO/TiO_(2)heterojunction(100 nm),H-TPVD selectively absorbs the ultraviolet(UV)band of sunlight and has a transparency of up to 71%in the visible *** integrated nanoscale architecture manifests the significant holecollecting capability of the G-SWNT hybrid film and the efficient carrier generation and separation within the ultrathin NiO/TiO_(2)heterojunction,resulting in excellent performance of the H-TPVD with a specific detectivity of 2.7×10^(10) ***,the freestanding G-SWNT TCF is a super stable and non-porous two-dimensional film that can insulate gas molecules,thereby protecting the surface properties of NiO/TiO_(2)heterojunctions and enhancing the stability of *** subjected to 20,000 cycles and storage in air for three months,the performance parameters such as photo-response signal,output power,and specific detectivity show no noticeable *** particular,the as-fabricated self-powered H-TPVD can operate over a wide temperature range from −180 to 300℃,and can carry out solar-blind UV optical communication in this *** addition,the 4×4 array H-TPVD demonstrates clear optical *** results make it possible for H-TPVD to expand its potential application scenarios.

关键词： transparent photovoltaic devices hybrid films of graphene and single-walled carbon nanotubes metal oxides stability wide temperature range

Multiparty simultaneous quantum identity authentication with secret sharing

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Science china(Physics,Mechanics & Astronomy) 2008年第3期51卷 321-327页

作者： yang YuGuang1,2,WEN QiaoYan3 & zhang xing4,5 1 College of Computer Science and Technology,beijing university of Technology,beijing 100022,china 2 State Key laboratory of Information Security (Graduate university of the Chinese Academy of Sciences),beijing 100049,china 3 school of Science,beijing university of posts and telecommunications,beijing 100876,china 4 Institute of electronic Technology,Information engineering university,Zhengzhou 450004,china 5 Trusted Computing laboratory,beijing university of Technology,beijing 100022,china College of Computer Science and Technology Beijing University of Technology Beijing China State Key laboratory of Information Security (Graduate university of the Chinese Academy of Sciences) Beijing China school of Science Beijing University of Posts and Telecommunications Beijing China Institute of electronic Technology Information Engineering University Zhengzhou China Trusted Computing laboratory Beijing University of Technology Beijing China

Two multiparty simultaneous quantum identity authentication (MSQIA) protocols based on secret sharing are presented. All the users can be authenticated by a trusted third party (TTP) simultaneously. In the first protocol,the TTP shares a random key K with all the users using quantum secret sharing. The ith share acts as the authentication key of the ith user. When it is necessary to perform MSQIA,the TTP generates a random number R secretly and sends a sequence of single photons encoded with K and R to all the users. According to his share,each user performs the corresponding unitary operations on the single photon sequence sequentially. At last,the TTP can judge whether the impersonator exists. The sec-ond protocol is a modified version with a circular structure. The two protocols can be efficiently used for MSQIA in a network. They are feasible with current technol-ogy.

关键词： quantum identity authentication secret sharing quantum cryptography

Vertically grown MoS_(2)nanosheets on graphene with defect-rich structure for efficient sodium storage

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Rare Metals 2024年第3期43卷 1062-1071页

作者： ying Wang Jia-Peng He Han-Qing Pan Qing-Peng Wang lei zhang Yong-Chang liu Qing-hong Wang school of Chemistry&Materials Science Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional MaterialsJiangsu Normal UniversityXuzhou221116China Institute of Biopharmaceutical Research Liaocheng UniversityLiaocheng252059China beijing Advanced Innovation Center for Materials Genome engineering Institute for Advanced Materials and TechnologyState Key Laboratory for Advanced Metals and MaterialsUniversity of Science and Technology BeijingBeijing100083China Centre for Catalysis and Clean Energy Gold Coast CampusGriffith UniversityGold CoastQLD4222Australia

The synthesis of a perpendicular growth structure of MoS_(2)nanosheets on graphene for efficient sodium storage is challenging yet ideal due to the benefits of open ion diffusion channels and high electronic *** this study,we have successfully fabricated a novel structure of vertical MoS_(2)nanosheets on graphene,with ZnS nanoparticles serving as bonding points(MoS_(2)/ZnS/G),through a facile hydrothermal *** the synthesis process,Zn^(2+)not only acts as a landing site for the vertical growth of MoS_(2)nanosheets but also triggers the formation of a defect-rich structure in the final *** unique architecture of MoS_(2)/ZnS/G effectively combines the advantages of a vertically aligned geometry and a defectrich structure for energy *** resulting structure displays shortened transport paths for electrons/ions,enhanced conductivity,improved structural integrity,and an increased number of active sites for promising electrochemical *** expected,when used as anode for sodium-ion batteries,the as-synthesize d MoS_(2)/ZnS/G exhibits excellent rate capability(high capacity of 298 mAh·g^(-1)at 5 A·g^(-1))and good cycling stability(a capacity decay of 0.056%per cycle after 500 cycles at 1 A·g^(-1)).According to the kinetic investigations,the electrochemical process of the MoS_(2)/ZnS/G sample is primarily governe d by a pseudocapacitive behavior,which enhances the charge/discharge kinetics and allows the MoS_(2)/ZnS/G structure to remain intact during cycling.

关键词： MoS_(2) Perpendicular growth Graphene Sodium storage Electrochemical performance

Expert consensus on the diagnosis and treatment of macrolide-resistant Mycoplasma pneumoniae pneumonia in children

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World Journal of Pediatrics 2024年第9期20卷 901-914页

作者： ying-Shuo Wang Yun-lian Zhou Guan-Nan Bai Shu-Xian li Dan Xu li-Na Chen xing Chen Xiao-Yan Dong hong-Min Fu Zhou Fu Chuang-li Hao Jian-Guo hong En-Mei liu Han-Min liu Xiao-Xia lu Zheng-Xiu luo lan-Fang Tang Man Tian Yong Yin Xiao-Bo zhang Jian-hua zhang Hai-lin zhang De-Yu Zhao Shun-ying Zhao Guo-hong Zhu ying-Xue Zou Quan lu Yuan-Yuan zhang Zhi-Min Chen Department of Pulmonology Children’s HospitalZhejiang University School of MedicineNational Clinical Research Center for Child HealthHangzhou 310052China Department of Child Health Care Children’s HospitalZhejiang University School of MedicineNational Clinical Research Center for Child HealthHangzhou 310052China Department of Pediatric Pulmonology and Immunology West China Second University HospitalSichuan UniversityChengdu 610041China Department of Pediatrics Shandong Provincial Hospital Affiliated to Shandong First Medical UniversityJinan 250021China Department of Pulmonology Shanghai Children’s HospitalSchool of MedicineShanghai Jiao Tong UniversityShanghai 200062China Department of Pulmonary and Critical Care Medicine Kunming Children’s HospitalKunming 650034China Department of Respiratory Medicine Children’s Hospital of Chongqing Medical UniversityChongqing 400014China Department of Pulmonology Children’s Hospital of Soochow UniversitySuzhou 215003China Department of Pediatrics Shanghai General Hospital Affiliated to Shanghai Jiaotong University School of MedicineShanghai 200080China Department of Respiratory Medicine Wuhan Children’s HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhan 430015China Department of Respiratory Medicine Children’s Hospital of Nanjing Medical UniversityNanjing 210008China Department of Respiratory Medicine Shanghai Children’s Medical CenterShanghai Jiao Tong University School of MedicineShanghai 200127China Department of Respiratory Medicine Children’s Hospital of Fudan UniversityShanghai 201102China Department of Pediatric Pulmonology Xinhua HospitalShanghai Jiaotong University School of MedicineShanghai 201102China Department of Pediatric Respiratory Medicine The Second Affiliated Hospital and Yuying Children’s Hospital of Wenzhou Medical UniversityWenzhou 325027China National Clinical Research Center for Respiratory Diseases Beijing Children’s HospitalCapital Medical UniversityBeijing 100045China Departmen

Background Mycoplasma pneumoniae(***)is a significant contributor to community-acquired pneumonia among *** 1968,when a strain of *** resistant to macrolide antibiotics was initially reported in Japan,macrolide-resistant ***(MRMP)has been documented in many countries worldwide,with varying incidence *** infections lead to a poor response to macrolide antibiotics,frequently resulting in prolonged fever,extended antibiotic treatment,increased hospitalization,intensive care unit admissions,and a significantly higher proportion of patients receiving glucocorticoids or second-line *** 2000,the global incidence of MRMP has gradually increased,especially in East Asia,which has posed a serious challenge to the treatment of *** infections in children and attracted widespread attention from ***,there is still no global consensus on the diagnosis and treatment of MRMP in *** We organized 29 Chinese experts majoring in pediatric pulmonology and epidemiology to write the world’s first consensus on the diagnosis and treatment of pediatric MRMP pneumonia,based on evidence *** evidence searches and reviews were conducted using electronic databases,including PubMed,Embase,Web of Science,CNKI,Medline,and the Cochrane *** used variations in terms for“macrolide-resistant”,“Mycoplasma pneumoniae”,“MP”,“***”,“pneumonia”,“MRMP”,“lower respiratory tract infection”,“Mycoplasma pneumoniae infection”,“children”,and“pediatric”.Results Epidemiology,pathogenesis,clinical manifestations,early identification,laboratory examination,principles of antibiotic use,application of glucocorticoids and intravenous immunoglobulin,and precautions for bronchoscopy are *** and rapid identification of gene mutations associated with MRMP is now available by polymerase chain reaction and fluorescent probe techniques in respiratory *** the resistance rate to mac

关键词： Child Macrolide-resistant Mycoplasma pneumoniae Recommendation Diagnosis Treatment

Analysis of Radiating Electric Field for Indoor Broadband Power line Communication

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Analysis of Radiating Electric Field for Indoor Broadband Po...

A verifiable and efficient cross-chain calculation model for charging pile reputation

IEEE 2007 International Symposium on Microwave,Antenna,Propagation and EMC Technologies for Wireless Communications(ISMAPE-2007)

作者： yang biao,lV ying-hua,zhang hong-xin~+ (The school of telecommunication and network technology,beijing university of posts and telecommunications, beijing,100876,china,+The school of electronic engineering,beijing university of posts and telecommunications,beijing,100876,china)

Broadband Power line Communication(BPl)is a novel technology for constructing home ***, the electric field radiating from the power lines could change the indoor electromagnetic environment even disturb other radio communication ***,a model based on four- port networks is proposed to evaluate the radiating field. Numerous branches of power lines are also taken into account. The radiating electric field from a 12-m-long indoor power line with 3 branches has been measured and the results demonstrate the practical value of the proposed model.

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High-Confidence Computing

High-Confidence Computing 2024年第2期4卷 105-115页

作者： Cui zhang Yunhua He Bin Wu Hui yang Ke Xiao hong li school of Information Science and Technology North China University of TechnologyBeijing 100144China school of electronic engineering Beijing University of Posts and TelecommunicationsBeijing 100876China Institute of Information engineering Chinese Academy of SciencesBeijing 100195China

To solve the current situation of low vehicle-to-pile ratio,charging pile(CP)operators incorporate private CPs into the shared charging ***,the introduction of private CP has brought about the problem of poor service *** is a common service evaluation scheme,in which the third-party reputation scheme has the issue of single point of failure;although the blockchain-based reputation scheme solves the single point of failure issue,it also brings the challenges of storage and query *** is a feasible solution to classify and store information on multiple chains,and at this time,reputation needs to be calculated in a cross-chain *** reputation calculation faces the problems of correctness verification,integrity verification and ***,this paper proposes a verifiable and efficient cross-chain calculation model for CP ***,in this model,we propose a verifiable cross-chain contract calculation scheme that adopts polynomial commitment to solve the problems of polynomial damage and tampering that may be encountered in the crosschain process of outsourced polynomials,so as to ensure the integrity and correctness of polynomial *** addition,the miner selection and incentive mechanism algorithm in this scheme ensures the correctness of extracted information when the outsourced polynomial is calculated on the *** security analysis and experimental results demonstrate that this scheme is feasible in practice.

关键词： Blockchain Shared charging Reputation Cross-chain Verifiable