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Asymptotic Analysis and Precoding Design of Integrated Access and Backhaul in Full-Duplex mmWave Networks

China Communications 2022年第5期19卷 24-45页

作者： yi zhang Shuai han Weixiao Meng Xunan Li Yue Chen Communications Research Center Harbin Institute of TechnologyHarbin 150001China National Computer Network Emergency Response Technical Team/Coordination Center of China Beijing 100000China

In this paper,we consider a full-duplex(FD)millimeter wave(mmWave)multiuser integrated access and backhaul(IAB)system with massive MIMO,and the system asymptotic performance and interference cancellation schemes are ***,the asymptotic performance of the IAB system with massive MIMO is *** the number of macro base station(MBS)and small base station(SBS)antennas approaches infinity,the FD selfinterference(SI),inter-tier interference and noise can be eliminated,which means that only multiuser interference remains in the ***,multiuser interference can be suppressed by the base band(BB)*** all interference and noise are suppressed,the spectral efficiency of the SBS and users are infinite in ***,two interference suppression precoding schemes are proposed.A block diagonalization(BD)-based interference cancellation scheme is designed based on the channel characteristics and null space *** FD SI,intertier interference and multiuser interference are eliminated by BB *** of eliminating interference completely,a signal to leakage and noise ratio(SLNR)-based precoding scheme is derived to suppress both interference and *** utilizing the Rayleigh-Ritz theorem,the SLNRs of the SBS and users are *** results show that all the interference can be effectively eliminated by the BD-based scheme at the cost of spectral efficiency performance loss,while the SLNR-based scheme can balance interference and noise and achieve higher spectral efficiency with comparatively low interference ***,the BD-based scheme is more suitable for interference elimination cases,and the SLNRbased scheme can improve the system performance in low interference scenarios.

关键词： millimeter wave full duplex integrated access and backhaul precoding

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Plastid phylogenomic insights into the evolution of subfamily Dialioideae (Leguminosae)

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Plant Diversity 2021年第1期43卷 27-34页

作者： han-Rui Bai Oyetola Oyebanji Rong zhang Ting-Shuang yi Germplasm Bank of Wild Species Kunming Institute of BotanyChinese Academy of SciencesKunmingYunnan650201China College of Life Science Yunnan UniversityKunmingYunnan650201China Kunming College of Life Science University of Chinese Academy of SciencesKunmingYunnan650201China

The subfamily Dialioideae(Leguminosae)consists of 17 genera and about 85 *** studies have detected significant plastid genome(plastome)structure variations in legumes,particularly in subfamilies Papilionoideae and *** it is important to investigate plastomes from the newly recognized Dialioideae to better understand the plastome variation across the whole ***,we used nine plastomes representing nine genera of Dialioideae to explore plastome structural variation and intergeneric relationships in this *** plastomes of Dialioideae exhibited a typical quadripartite structure,and had relatively conserved structure compared with other legume ***,the genome size ranged from 154,124 bp to 165,973 bp and gene numbers ranged from 129 to132,mainly due to the expansion and contraction of the inverted repeat(IR)*** IR of Distemonanthus benthamianus has experienced two separate expansions into the large single copy(LSC)region and the small single copy(SSC)region,and one contraction from *** procera has experienced two separate IR expansions into LSC,while Dicorynia paraensis has experienced an IR contraction from *** divergent regions or genes(ndhC-trnV^(UAC),psbK-trnQ^(UUG),rps19-rps3,rpl33-rps18,accD-psaI,trnG^(UCC)-trnS^(GCU),psbI-trnS^(GCU),5'rps16-trnQ^(UUG)and ycf1)were identified as potential molecular markers for further species delimitation and population genetics analysis in *** analysis based on 77 protein-coding sequences fully resolved the intergeneric relationships among nine genera except a moderately supported sister relationship between Petalostylis labicheoides and Labichea *** study reveals new insights into the structural variations of plastomes in subfamily Dialioideae and advances our understanding of the evolutionary trajectories of legume plastomes.

关键词： Dialioideae Plastome IR expansion/contraction Fabaceae Variation

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Effects of pressure and plastic addition on sticking of fine iron ore particles in fluidized bed reduction

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Journal of Iron and Steel Research International 2021年第2期28卷 140-151页

作者： Qi-yan Xu zhang-han Gu Zhi-ping Li ying-yi zhang Hai-chuan Wang School of Metallurgical Engineering Anhui University of TechnologyMa’anshan 243002AnhuiChina

The adhesion of fine iron ore particles during fluidized bed reduction was studied using pressurized visible fluidized bed laboratory *** results showed that the optimal operating parameters for pure hydrogen reduction under high pressure were reduction temperature of 1073 K,particle size of 0.18-0.66 mm,pure H_(2) linear velocity of 0.8 m/s,reduction pressure of 200 kPa,and reduction time of 50 *** plastic particles were mixed into the fluidized bed,the optimal parameters were reduction temperature of 973 K,particle size of 0.18-0.66 mm,pure H_(2) linear velocity of 0.8 m/s,reduction pressure of 100 kPa,mass content of plastic particles of 8%,and reduction time of 65 *** chemical reaction resistance is much higher than the inner diffusion resistance at the initial stage of the reaction,whereas,in later stage,the inner diffusion resistance exceeds the chemical reaction *** contact area of iron atoms or iron whiskers gradually decreases with the increase in reduction pressure from 0.20 to 0.45 MPa,and the sticking trend gradually *** plastic particles in the fluidized reduction process of fine iron ore can effectively inhibit the adhesion among fine iron ore particles.

关键词： Fine iron ore Fluidized bed Reduction pressure Plastic particle Sticking Reduction

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A Survey on Blocking Technology of Entity Resolution

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Journal of Computer Science & Technology 2020年第4期35卷 769-793页

作者： Bo-han Li yi Liu An-Man zhang Wen-Huan Wang Shuo Wan College of Computer Science and Technology Nanjing University of Aeronautics and AstronauticsNanjing 211106China Key Laboratory of Safety-Critical Software Ministry of Industry and Information TechnologyNanjing 211106China Collaborative Innovation Center of Novel Software Technology and Industrialization Nanjing 210000China

Entity resolution(ER)is a significant task in data integration,which aims to detect all entity profiles that correspond to the same real-world *** to its inherently quadratic complexity,blocking was proposed to ameliorate ER,and it offers an approximate solution which clusters similar entity profiles into blocks so that it suffices to perform pair-wise comparisons inside each block in order to reduce the computational cost of *** paper presents a comprehensive survey on existing blocking *** summarize and analyze all classic blocking methods with emphasis on different blocking construction and optimization *** find that traditional blocking ER methods which depend on the fixed schema may not work in the context of highly heterogeneous information *** to use schema information flexibly is of great significance to efficiently process data with the new features of this *** learning is an important tool for ER,but end-to-end and efficient machine learning methods still need to be *** also sum up and provide the most promising trend for future work from the directions of real-time blocking ER,incremental blocking ER,deep learning with ER,etc.

关键词： blocking construction blocking optimization data linkage entity resolution

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Laser-induced topology optimized amorphous nanostructure and corrosion electrochemistry of supersonically deposited Ni_(30)Cr_(25)Al_(15)Co_(15)Mo_(5)Ti_(5)Y_(5) HEA coating based on AIMD

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Journal of Materials Science & Technology 2022年第11期106卷 257-269页

作者： Xue Yan Cheng zhang Yangshuai Li Youjian yi Ziruo Cui Bingyuan han State Key Laboratory of High Field Laser Physics Shanghai Institute of Optics and Fine MechanicsChinese Academy of SciencesShanghai 201800China hangzhou Institute for Advanced Study University of Chinese Academy of Sciences(UCAS)Hangzhou 310024China National Laboratory on High Power Laser and Physics Shanghai Institute of Optics and Fine MechanicsChinese Academy of SciencesShanghai 201800China Key Laboratory for Laser Plasmas(MOE) Collaborative Innovation Center of IFSA(CICIFSA)School of Physics and AstronomyShanghai Jiao Tong UniversityShanghai 200240China School of Automotive and Traffic Engineering Jiangsu University of TechnologyChangzhou 213001China

A novel Ni_(30)Cr_(25)Al_(15)Co_(15)Mo_(5)Ti_(5)Y_(5) high-entropy alloy(HEA)coating was irradiated to optimize its internal structure via laser after supersonic particle deposition(SPD).Owing to the high energy density of the laser and large temperature gradient,the crystallization process of the molecules and atoms in the coating was restrained and supercooling *** results showed that a considerable number of nano-crystal grains precipitated and amorphous structures were formed because of the random orientation of the *** baseline of differential scanning calorimetry scans obtained for the coating started to shift at the Tg of 939.37℃ and a step was *** dispersion peaks and lattice fringes indicated that the nucleation of the irradiated laser-induced topology optimized(LTO)coating was *** laser-induced topology optimizing treatment led to quasi-isotropy in the SPD ***,the LTO coating exhibited a residual stress of 18.4 MPa,stress-strain response,and fatigue limit of 265 ***,the LTO coating exhibited higher performance than the unirradiated SPD *** Nyquist and Bode electrochemical impedance spectra of the LTO coating,including two relaxation processes,indicated that the corrosion process steadily recovered to the equilibrium *** implies that the uniform oxidation passivation layer on the surface of the LTO coating insulated the material from the corrosive medium,protecting the substrate from further corrosion,thus enhancing the structural security of the material for use in super-intense laser facility applications.

关键词： Ultrasonic atomization spin method(UASM) Laser-induced topology optimized(LTO) Amorphous nanostructure High-entropy alloy(HEA) Ab-initio molecular dynamics(AIMD)

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MOFs derived magnetic porous carbon microspheres constructed by core-shell Ni@C with high-performance microwave absorption

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Journal of Materials Science & Technology 2021年第29期88卷 56-65页

作者： Sai Gao Guozheng zhang yi Wang Xiaopeng han ying Huang Panbo Liu School of Chemistry and Chemical Engineering Northwestern Polytechnical UniversityXi’an710129China

Lightweight and high-performance are two determining factors for metal-organic-frameworks(MOFs)derived microwave ***,most of the reported MOFs derived absorbers usually possess high filler ***,a series of MOFs derived magnetic porous carbon microspheres with tunable diameter and high specific surface area have been synthesized via a pyrolysis *** synthesized magnetic porous carbon microspheres,constructed by uniformly distributed core-shell Ni@C,exhibit high-performance microwave absorption with a low filler loading of 10 wt%.Considering the mciro-mesoporous structures,matched impedance,strong conductive loss,enhanced dipolar/interfacial polarization as well as strong magnetic coupling network,a minimum reflection loss of-60 dB and an absorption bandwidth of 7.0 GHz can be achieved at 2.6 ***,the bandwidth reaches as wide as 10.2 GHz when the thickness is 4 *** addition,compared with other MOFs derived absorbers,this work provides us a simple strategy for the synthesis of porous carbon microspheres with lightweight and high-performance microwave absorption for practical applications.

关键词： Metal-organic-frameworks Carbon microspheres Magnetic particles Core-shell structure Microwave absorption

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Improved Dota2 Lineup Recommendation Model Based on a Bidirectional LSTM

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Tsinghua Science and Technology 2020年第6期25卷 712-720页

作者： Lei zhang Chenbo Xu yihua Gao yi han Xiaojiang Du Zhihong Tian Henan Key Laboratory of Big Data Analysis and Processing Kaifeng 457004China Institute of Data and Knowledge Engineering Henan UniversityKaifeng 475004.China National Internet Emergency Center Zhengzhou 450000China Department of Computer and Information Sciences Temple UniversityPhiladelphiaPA 19122-6008USA Cyberspace Institute of Advanced Technology Guangzhou UniversityGuangzhou 510006China

In recent years,e-sports has rapidly developed,and the industry has produced large amounts of data with specifications,and these data are easily to be *** to the above characteristics,data mining and deep learning methods can be used to guide players and develop appropriate strategies to win *** one of the world’s most famous e-sports events,Dota2 has a large audience base and a good game system.A victory in a game is often associated with a hero’s match,and players are often unable to pick the best lineup to *** solve this problem,in this paper,we present an improved bidirectional Long Short-Term Memory(LSTM)neural network model for Dota2 lineup *** model uses the Continuous Bag Of Words(CBOW)model in the Word2 vec model to generate hero *** CBOW model can predict the context of a word in a ***,a word is transformed into a hero,a sentence into a lineup,and a word vector into a hero vector,the model applied in this article recommends the last hero according to the first four heroes selected first,thereby solving a series of recommendation problems.

关键词： Word2vec mutiplayer online battle arena games Continuous Bag Of Words(CBOW)model Long Short-Term Memory(LSTM)

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Electrochemical Preparation of Mg-Li-Al-Er Alloys by Co-reduction in Molten Chloride

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Acta Metallurgica Sinica(English Letters) 2013年第4期26卷 455-460页

作者： yi SUN Milin zhang Wei han Mei LI Yusheng YANG Yongde YAN Meng zhang Key Laboratory of Superlight Materials and Surface Technology Ministry of EducationCollege of Materials Science and Chemical EngineeringHarbin Engineering University

The electrochemical behavior of Mg, Li, AI and Er were investigated by electrochemical techniques in LiCI- KCI-MgCI2-AICI3-ErCI3 melts at 823 K. The cyclic voltammetry and chronopotentiometry indicated that the co-reduction of Mg, Li, AI and Er occurs at current densities more negative than -0.89 ***-2. Er（lll） under-potential deposited on pre-reduced AI electrode formed AI-RE alloys. X-ray diffraction （XRD） results indicated that Mg17Al12, Al2Er, Al2Er3 and Al4Li9 phases were prepared by galvanostatic electrolysis. ICP analyses of samples showed that lithium and aluminum contents of Mg-Li-AI-Er alloys could be controlled by concentration of AICI3 and cathodic current density.

关键词： Mg-Li based alloys Co-reduction Rare earth Molten salt electrolysis

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Opaque Gd_(2)Zr_(2)O_(7)/GdMnO_(3) thermal barrier materials for thermal radiation shielding:The effect of polaron excitation

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Journal of Materials Science & Technology 2022年第5期100卷 67-74页

作者： Muzhang Huang Jia Liang Peng zhang yi Li yi han Zesheng Yang Wei Pan Chunlei Wan State Key Lab of New Ceramics and Fine Processing School of Materials Science and EngineeringTsinghua UniversityBeijing 100084China

Opaque thermal barrier materials play a pivotal role in thermal radiation shielding of turbine blades,since the intensity of thermal radiation rapidly increases with the increase of operating temperature of gas turbines and has become a new and major concern for the durability of metallic *** conventional thermal barrier coating(TBC)materials such as YSZ and Gd_(2)Zr_(2)O_(7),however,are almost translucent to thermal radiation and are unable to protect the blades at such harsh *** searching for new thermal barrier materials is significant,it is still a challenge to make the current TBC materials opaque without significantly modifying the composition or other physical *** cope with this challenge,GdMnO_(3) is incorporated as an absorptive second phase into Gd_(2)Zr_(2)O_(7) in this work,which is originally translucent(absorption coefficient 10^(1)-10^(2) m^(-1))in the near-infrared ***,with less than 5 wt.%GdMnO_(3),the Gd_(2)Zr_(2)O_(7)/GdMnO_(3) becomes opaque to thermal radiation and successfully refrains the rise of thermal conductivity at high ***,the lattice thermal conductivity and mechanical properties are almost *** small polaron mechanism is confirmed for GdMnO_(3),leading to a high absorption coefficient(>10^(6) m^(-1))for near-infrared *** understand the underling mechanism,a theoretical model is built to estimate the absorption coefficient of the Gd_(2)Zr_(2)O_(7)/GdMnO_(3) composites(>10^(4) m^(-1)).This paper proposes a powerful strategy to design thermal-radiation-shielding TBCs through incorporating minor second-phase particles with high-absorption mechanism,such as polaron excitation.

关键词： Thermal barrier coatings Thermal radiation Radiative heat transfer Emissivity Small polaron

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Precipitation of μ Phase in Nickel-based Powder Metallurgy Superalloy FGH97

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Journal of Iron and Steel Research International 2016年第8期23卷 851-856页

作者： Li-ming TAN yi-wen zhang Jian JIA Shou-bo han High Temperature Material Institute Central Iron and Steel Research Institute Beijing 100081 China Beijing Key Laboratory of Advanced High Temperature Materials Beijing 100081 China

The precipitation behavior of topological close-packed（TCP）μphase in powder metallurgy（P/M）nickelbased superalloy FGH97 was *** results showed that proper addition of solution strengthening elements,such as Co,Cr,W,Mo,improved tensile strength,while excessive addition of those elements facilitated the precipitation ofμphase,which seriously aggravated the plasticity of the P/M *** the heat-treated specimens,the relationship between critical aging time（whenμstarted to precipitate）,aging temperature,and the average electron vacancy number ofγmatrix was established.

关键词： superalloy precipitate tensile plasticity seriously Precipitation topological strengthening packed metallurgy

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