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Performance of Cooperative Spatial Modulation with AF Protocol in Wireless Relay Network

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Chinese Journal of Electronics 2019年第1期28卷 143-151页

作者： YU Xiangbin pan qing WANG Cheng College of Electronic and Information Engineering Nanjing University of Aeronautics and Astronautics National Mobile Communications Research Laboratory Southeast University

By combing Spatial modulation(SM) with the Amplify-and-forward(AF) cooperative communication, a cooperative SM scheme with AF(AF-SM) protocol is presented, and the corresponding Bit error rate(BER)performance is investigated. Based on the performance analysis, the error probability of antenna index estimation(Pa) and the error probability of symbol estimation(Pd),which constitutes the overall average BER, are derived,respectively. As a result, tightly approximate closedform expressions of Paand Pdare attained, *** these expressions, the closed-form overall average BER is achieved. During the analysis, the computational complexity of AF-SM detector is also provided in terms of the complex addition and multiplication ***, the asymptotic BER at high SNR and the corresponding diversity gain are further derived, and the resultant diversity gain of Nr+ 1 is obtained for the system with Nrreceive antennas. Simulation results show that our theoretical analysis is valid, and provides good performance evaluation method for cooperative SM system. Moreover, the BER performance can be effectively improved as Nrincreases due to higher diversity gain.

关键词： Spatial modulation(SM) Cooperative communication Amplify and forward protocol Diversity gain Average bit error rate

Model the Solvent-Excluded Surface of 3D Protein Molecular Structures Using Geometric PDE-Based Level-Set Method

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Communications in Computational Physics 2009年第9期6卷 777-792页

作者： qing pan Xue-Cheng Tai College of Mathematics and Computer Science Hunan Normal UniversityChangsha410081China Division of Mathematical Sciences School of Physical and Mathematical SciencesNanyang Technological UniversitySingapore Department of Mathematics University of BergenNorway

This paper presents an approach to model the solvent-excluded surface(SES)of 3D protein molecular structures using the geometric PDE-based level-set *** level-set method embeds the shape of 3D molecular objects as an isosurface or level set corresponding to some isovalue of a scattered dense scalar field,which is saved as a discretely-sampled,rectilinear grid,i.e.,a volumetric *** level-set model is described as a class of tri-cubic tensor product B-spline implicit surface with control point values that are the signed distance *** geometric PDE is evolved in the discrete *** geometric PDE we use is the mean curvature specified flow,which coincides with the definition of the SES and is geometrically *** technique of speeding up is achieved by use of the narrow band strategy incorporated with a good initial approximate construction for the *** get a very desirable approximate surface for the SES.

关键词： Solvent-excluded surface implicit surface mean curvature specified flow level-set method

One novel multidimensional organic-inorganic hybrid based on polyoxometalates and copper chlorine coordination polymers with 4,4'-bipyridine ligands

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Chinese Chemical Letters 2012年第7期23卷 859-862页

作者： Li Chun Xuan qing Jiang pan School of Chemistry and Materials Science Heilongjiang UniversityHarbin 150080China

One novel organic-inorganic hybrid materials with 4,4＇-bipy ligands and copper chlorine coordination polymers as linkers,with new topology,{[Cu^I（4,4＇-bipy）]_（10）Cl_2（SiW_（12）O_（40））_2}·6H_2O（1）（4,4＇-bipy = 4,4＇-bipyridine）,has been hydrothermally synthesized. The single crystal X-ray structural analysis reveals that the structure of 1 is constructed from classical Keggin anions and[Cu^I（4,4＇- bipy）]cations into a novel,three-dimensional（3D） polyoxometalates（POMs）based *** the topological view,compound 1 is a novel（3.4^4.5^2.6^3）（3^2.4^4.5^6.6^9） *** electrochemical and photocatalysis properties of 1 have been investigated in details.

关键词： Polyoxometalate Tungstoferrate Framework Novel topology

Topsoil organic carbon mineralization and CO_2 evolution of three paddy soils from South China and the temperature dependence

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Journal of Environmental Sciences 2007年第3期19卷 319-326页

作者： ZHANG Xu-hui LI Lian-qing pan Gen-xing Institute of Resources Ecosystem and Environment of Agriculture Nanjing Agricultural University Nanjing 210095 China.

Carbon mineralization and its response to climatic warming have been receiving global attention for the last decade. Although the virtual influence of temperature effect is still in great debate, little is known on the mineralization of organic carbon （SOC） of paddy soils of China under warming. SOC mineralization of three major types of China＇s paddy soils is studied through laboratory incubation for 114 d under soil moisture regime of 70% water holding capacity at 20℃ and 25℃ respectively. The carbon that mineralized as CO2 evolved was measured every day in the first 32 d and every two days in the following days. Carbon mineralized during the 114 d incubation ranged from 3.51 to 9.22 mg CO2-C/gC at 20℃ and from 4.24 to 11.35 mg CO2-C/gC at 25℃ respectively; and a mineralizable C pool in the range of 0.24 to 0.59 gC/kg, varying with different soils. The whole course of C mineralization in the 114 d incubation could be divided into three stages of varying rates, representing the three subpools of the total mineralizable C： very actively mineralized C at 1-23 d, actively tnineralized C at 24--74 d and a slowly mineralized pool with low and more or less stabilized C mineralization rate at 75-114 d. The calculated Q10 values ranged from 1.0 to 2.4, varying with the soil types and N status. Neither the total SOC pool nor the labile C pool could account for the total mineralization potential of the soils studied, despite a well correlation of labile C with the shortly and actively mineralized C, which were shown in sensitive response to soil warming. However, the portion of microbial C pool and the soil C/N ratio controlled the C mineralization and the temperature dependence. Therefore, C sequestration may not result in an increase of C mineralization proportionally. The relative control of C bioavailability and microbial metabolic activity on C mineralization with respect to stabilization of sequestered C in the paddy soils of China is to be further studied.

关键词： C mineralization carbon pool laboratory incubation paddy soil soil warming

Double-branch fusion network with a parallel attention selection mechanism for camouflaged object detection

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Science China(Information Sciences) 2023年第6期66卷 258-266页

作者： Junjiang XIANG qing pan Zhengrong ZHANG Songnian FU Yuwen QIN Advanced Institute of Photonics Technology School of Information EngineeringGuangdong University of Technology Guangdong Provincial Key Laboratory of Photonics Information Technology Guangdong University of Technology Guangxi Key Laboratory of Multimedia Communications and Network Technology School of Computer Electronics and InformationGuangxi University

To meet the challenge of camouflaged object detection (COD),which has a high degree of intrinsic similarity between the object and background,this paper proposes a double-branch fusion network(DBFN)with a parallel attention selection mechanism (PASM).In detail,a schismatic receptive field block(SRF)combined with an attention mechanism for low-level information is performed to learn texture features in one branch,and an integration of the SRF,a hybrid attention mechanism (HAM),and a depth feature polymerization module (DFPM)is employed for high-level information to extract detection features in the other ***,both texture features and detection features are input into the PASM to acquire selective expression ***,the final result is obtained after further selective matrix optimization with atrous spatial pyramid pooling (ASPP)and a residual channel attention block (RCAB)being applied *** results on three public datasets verify that our method outperforms the state-of-the-art methods in terms of four evaluation metrics,i.e.,mean absolute error (MAE),weighted F βmeasure (Fβω),structural measure (Sα),and E-measure (Eφ)

关键词： camouflaged object detection attention mechanism feature extraction feature aggregation texture information fuzzy boundary

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

Performance Analysis and Power Allocation for Cooperative SSK System with Receive Correlation in Rayleigh Fading Channel

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Transactions of Nanjing University of Aeronautics and Astronautics 2019年第4期36卷 537-544页

作者： YU Xiangbin LI Qiyishu HU Yaping pan qing College of Electronic and Information Engineering Nanjing University of Aeronautics and AstronauticsNanjing 210016P.R.China

In this paper,the performance analysis of cooperative space shift keying(SSK)system with dual hop amplify and forward(AF)in receive correlated Rayleigh channel is *** means of the performance analysis,a closed form approximate expression of the average bit error rate(BER)is derived for the performance *** this expression,in a high signal to noise ratio(SNR)region,a tight closed form asymptotic BER of the system is also *** can simplify the calculation of average BER and provide effective evaluation for asymptotic *** minimizing this asymptotic BER expression,a suboptimum power allocation(PA)scheme is developed,and the closed form PA coefficients are *** indicates that the suboptimal PA scheme outperforms the conventional equal PA scheme,and its performance is very close to that of the exhaustive search based optimal PA scheme but with low ***,the system performance under the spatially correlated channel is worse than that in spatially independent channel due to the effect of spatial correlation.

关键词： amplify and forward space shift keying receive correlation power allocation

A Review on Nano-/Microstructured Materials Constructed by Electrochemical Technologies for Supercapacitors

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Nano-Micro Letters 2020年第9期12卷 147-202页

作者： Huizhen Lv qing pan Yu Song Xiao‑Xia Liu Tianyu Liu Department of Chemistry Northeastern UniversityShenyang 110819People’s Republic of China Department of Chemistry Virginia Polytechnic Institute and State UniversityBlacksburgVA 24061USA

The article reviews the recent progress of electrochemical techniques on synthesizing nano-/microstructures as supercapacitor *** a history of more than a century,electrochemical techniques have evolved from metal plating since their inception to versatile synthesis tools for electrochemically active materials of diverse morphologies,compositions,and *** review begins with tutorials on the operating mechanisms of five commonly used electrochemical techniques,including cyclic voltammetry,potentiostatic deposition,galvanostatic deposition,pulse deposition,and electrophoretic deposition,followed by thorough surveys of the nano-/microstructured materials synthesized ***,representative synthesis mechanisms and the state-of-the-art electrochemical performances of exfoliated graphene,conducting polymers,metal oxides,metal sulfides,and their composites are *** article concludes with summaries of the unique merits,potential challenges,and associated opportunities of electrochemical synthesis techniques for electrode materials in supercapacitors.

关键词： Nanostructure Microstructure Electrochemical Synthesis Supercapacitor

Rapid diagnostic method for transplutonium isotope production in high flux reactors

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Nuclear Science and Techniques 2023年第3期34卷 125-142页

作者： qing-Quan pan qing-Fei Zhao Lian-Jie Wang Bang-Yang Xia Yun Cai Xiao-Jing Liu School of Nuclear Science and Engineering Shanghai Jiao Tong UniversityShanghai 200240China Science and Technology on Reactor System Design Technology Laboratory Nuclear Power Institute of ChinaChengdu 610200China

Transplutonium isotopes are scarce and need to be produced by irradiation in high flux ***,their production is inefficient,and optimization studies are *** study analyzes the physical nature of transplutonium isotope produc-tion using ^(252)Cf,^(244)Cm,^(242)Cm,and ^(238)Pu as *** methods based on the Monte Carlo burnup calculation have the limitations of many calculations and cannot analyze the individual energy intervals in detail;thus,they cannot sup-port the refined evaluation,screening,and optimization of the irradiation *** understanding the physical nature and simplifying the complexity of the production process,we propose a rapid diagnostic method for evaluating radiation schemes based on the concepts“single energy interval value(SEIV)”and“energy spectrum total value(ESTV)”.The rapid diagnostic method not only avoids tedious burnup calculations,but also provides a direction for *** optimal irradiation schemes for producing ^(252)Cf,^(244)Cm,^(242)Cm,and ^(238)Pu are determined based on a rapid diagnostic *** irradiation schemes can significantly improve production *** with the initial scheme,the optimal scheme improved the production efficiency of ^(238)Pu by 7.41 times;^(242)Cm,11.98 times;^(244)Cm,65.20 times;and ^(252)Cf,15.08 ***,a refined analysis of transplutonium isotope production is conducted and provides a theoretical basis for improving production efficiency.

关键词： Transplutonium isotope Rapid diagnostic method Production optimization Single energy interval value Energy spectrum total value