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China Communications 2022年第7期19卷 135-151页

作者： Hongbin wang Bangning Zhang heng wang Binbin Wu Daoxing Guo College of Communications and Engineering Army Engineering UniversityNanjing 210007China

In this paper,we address the problem of multiple frequency-hopping(FH)signal parameters estimation in the presence of random missing observations.A space-time matrix with random missing observations is acquired by a uniform linear array(ULA).We exploit the inherent incomplete data processing capability of atomic norm soft thresholding(AST)to analyze the space-time matrix and complete the accurate estimation of the hopping time and frequency of the received FH *** hopping time is obtained by the sudden changes of the spatial information,which is implemented as the boundary to divide the time domain signal so that each segment of the signal is a superposition of time-invariant multiple ***,the frequency of multiple signal components can be estimated precisely by AST within each *** obtaining the above two parameters of the hopping time and the frequency of signals,the direction of arrival(DOA)can be directly calculated by them,and the network sorting can be *** of simulation show that the proposed method is superior to the existing *** when a large portion of data observations is missing,as the number of array elements increases,the proposed method still achieves acceptable accuracy of multi-FH signal parameters estimation.

关键词： frequency hopping parameter estimation missing observations atomic norm soft thresholding uniform linear array

Immunomodulation of Proton-activated G Protein-coupled Receptors in Inflammation

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Current Medical Science 2024年第3期44卷 475-484页

作者： Min-shan LI Xiang-hong wang heng wang Department of Otolaryngology-Head and Neck Surgery Tongji HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhan430030China Institute of Allergy and Clinical Immunology Tongji HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhan430030China Hubei Clinical Research Center for Nasal Inflammatory Diseases Wuhan430030China

Proton-activated G protein-coupled receptors(GPCRs),initially discovered by Ludwig in 2003,are widely distributed in various *** receptors have been found to modulate the immune system in several inflammatory diseases,including inflammatory bowel disease,atopic dermatitis,and ***-activated GPCRs belong to the G protein-coupled receptor family and can detect alternations in extracellular *** detection triggers downstream signaling pathways within the cells,ultimately influencing the function of immune *** this review,we specifically focused on investigating the immune response of proton-activated GPCRs under inflammatory conditions.

关键词： proton-activated G protein-coupled receptors inflammation immunomodulation disease

Fabrication and property of high-performance Ag-Pb-Sb-Te system semiconducting thermoelectric materials

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Chinese Science Bulletin 2007年第7期52卷 990-996页

作者： ZHOU Min LI JingFengt wang heng State Key Laboratory of New Ceramics and Fine Processing Department of Materials Science and Engineering Tsinghua University Beijing 100084 China

High performance Ag-Pb-Sb-Te system thermoelectric bulk materials were fabricated by a combination of mechanical alloying (MA) and spark plasma sintering (SPS). Phase composition and microstructure of the resultant materials were investigated by X-ray diffraction (XRD) and scanning electron micros-copy (SEM) analysis. A special emphasis was paid to the effects of chemical composition, especially the Pb content on the thermoelectric properties of the Ag0.8Pb18+xSbTe20 samples, including electrical resistivity, Seebeck coefficient, power factor, thermal conductivity and dimensionless figure of merit. The present study reveals that the optimal composition of Ag0.8Pb18+xSbTe20 samples is Ag0.8Pb22.5SbTe20 and the maximum figure of merit (ZT) is 1.2 at 673 K.

关键词：半导体热电材料 Ag-Pb-Sb-Te系统制备性能

Credibility protection for resource sharing and collaborating in non-center network computing environments

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The Journal of China Universities of Posts and Telecommunications 2014年第3期21卷 46-55页

作者： XU Xiao-long TU Qun wang Xin-heng wang Ru-chuan College of Computer Nanjing University of Posts and Telecommunications State Key Laboratory for Novel Software Technology Nanjing University School of Computing University of the West of Scotland Paisley PA1 2BE United Kingdom

Non-center network computing environments have some unique characteristics, such as instability, heterogeneity, autonomy, distribution and openness, which bring serious issues of security and reliability. This article proposes a brand-new credibility protection mechanism for resource sharing and collaboration in non-center network computing environments. First, the three-dimensional hierarchical classified topology （3DHCT） is proposed, which provides a basic framework for realizations of the identity credibility, the behavior credibility and the capability credibility. Next, the agent technology is utilized to construct the credibility protection model. This article also proposes a new comprehensive credibility evaluation algorithm with simple, efficient, quantitative and able to meet the requirements of evaluating behavior credibility and the capability credibility evaluation as well. The Dempster-Shafer theory of evidence and the combination rule are used to achieve the evaluation of the capability credibility. The behavior credibility is evaluated with the current and historical performance of nodes for providers and consumers to realize more accurate prediction. Based on the non-center network computing simulation test platform, simulation is been conducted to test the performance and validity of the proposed algorithms. Experiment and analysis show that the proposed algorithms are suitable for large-scale, dynamic network computing environments, and able to maintain the credibility for networks without relying on central node, make a non-center network gradually evolve into an orderly, stable and reliable computing environment efficiently.

关键词： non-center network computing agent credibility evidence

Effect of multilayer graphene/nano-Fe2O3 composite additions on dry sliding wear behavior of titanium matrix composites

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Journal of Iron and Steel Research International 2020年第9期27卷 1117-1126页

作者： Huang Xie Yun-xue Jin Mu-ye Niu Ji-heng wang School of Material Science and Engineering Jiangsu University of Science and TechnologyZhenjiang 212003JiangsuChina National Demonstration Center for Experimental Materials Science and Engineering Education(Jiangsu University of Science and Technology) Zhenjiang 212003JiangsuChina

The wear tests of titanium matrix composites(TMCs)at the loads of 50,100,120,and 150 N were carried out with an MMW-1 vertical universal friction and wear tester to study the addition of multilayer graphene(MLG)/nano-Fe2O3 composites(0,0.1,0.2,0.3,0.4,and 0.5 g)on the dry sliding wear behavior of *** presented a marked variation in wear loss as a function of the amount of MLG/Fe2O3 addition,and a significant decrease in the friction coefficient was obtained,reducing this parameter up to 50%.With the rise and fall of wear loss,TMCs underwent a transition from severe wear to mild *** phenomena were attributed to the existence of a protective lubricating film,which prevented the surface from coming in direct contact,and the lubricating film was 15-20μm thick and made up of MLG/Fe2O3(1:2)*** structure was speculated to be similar to a rolling wood.

关键词： Titanium matrix composite Graphene Nanomaterial Lubricating film Wear behavior

Effectiveness of intravitreal ranibizumab for diabetic macular edema in vitrectomized versus non-vitrectomized eyes:a Meta-analysis

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International Journal of Ophthalmology(English edition) 2024年第4期17卷 729-735页

作者： Yi-heng wang Qian Xu Jie Luan Department of Ophthalmology Zhongda HospitalSoutheast UniversityNanjing 210009Jiangsu ProvinceChina School of Medicine Southeast UniversityNanjing 210009Jiangsu ProvinceChina

AIM:To evaluate the effectiveness and safety of intravitreal ranibizumab(IVR)for diabetic macular edema(DME)in vitrectomized versus non-vitrectomized ***:The PubMed,EMBASE,Web of Science,Cochrane,EBSCO were comprehensively searched for studies comparing vitrectomized and non-vitrectomized eyes with *** outcomes of best-corrected visual acuity(BCVA),central macular thickness(CMT),the mean number of intravitreal injection and adverse events were extracted and ***:Six studies involving 641 eyes were *** visual gain significantly improved and CMT significantly reduced in vitrectomized eyes at 6mo and 12mo visits(P<0.05).Although the mean reduction in CMT among non-vitrectomized eyes was significantly greater than in vitrectomized eyes at the 6mo[mean difference(MD)=53.57,95%confidence interval(CI):28.03 to 78.72,P<0.0001]and 12mo(MD=49.65,95%CI:19.58 to 79.72,P=0.01),no significant difference was detected in improvement in BCVA at either 6mo(MD=0.05,95%CI:-0.02 to 0.13,P=0.14)or 12mo(MD=0.03,95%CI:-0.04 to 0.09,P=0.43).Injection number of ranibizumab in non-vitrectomized eyes was significantly less than that in vitrectomized eyes during 6-month period(MD=0.60,95%CI:0.16 to 1.04,P=0.008),while there was no statistically significant difference between the two groups during 12mo of ***:Evidence from current study suggests that IVR was useful for both vitrectomized group and nonvitrectomized group with *** less reduction in macular thickness is found in vitrectomized group,visual improvement between two groups is similar.

关键词： diabetic macular edema ranibizumab vitrectomized eye

Multi-Attention Fusion Modeling for Sentiment Analysis of Educational Big Data

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Big Data Mining and Analytics 2020年第4期3卷 311-319页

作者： Guanlin Zhai Yan Yang heng wang Shengdong Du the School of Information Science and Technology National Engineering Laboratory of Integrated Transportation Big Data Application TechnologySouthwest Jiaotong UniversityChengdu 611756China

As an important branch of natural language processing,sentiment analysis has received increasing *** teaching evaluation,sentiment analysis can help educators discover the true feelings of students about the course in a timely manner and adjust the teaching plan accurately and timely to improve the quality of education and *** at the inefficiency and heavy workload of college curriculum evaluation methods,a Multi-Attention Fusion Modeling(Multi-AFM)is proposed,which integrates global attention and local attention through gating unit control to generate a reasonable contextual representation and achieve improved classification *** results show that the Multi-AFM model performs better than the existing methods in the application of education and other fields.

关键词： educational big data sentiment analysis aspect-level attention

ENRICHED GOAL-ORIENTED ERROR ESTIMATION APPLIED TO FRACTURE MECHANICS PROBLEMS SOLVED BY XFEM

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Acta Mechanica Solida Sinica 2012年第4期25卷 393-403页

作者： Zhijia Lin Zhuo Zhuang Xiaochuan You heng wang Dandan Xu Applied Mechanics Lab. School of AerospaceTsinghua UniversityBeijing 100084China

Based on the concept of constitutive relation error along with the residual of both origin and dual problems, a goal-oriented error estimation method with extended degrees of freedom is developed in this paper. It leads to high quality local error bounds in the problem of fracture mechanics simulation with extended finite element method （XFEM）, which involves enrichment to solve a stress singularity in the crack. Since goal-oriented error estimation with enriched degrees of freedom gives us a chance to evaluate the XFEM simulation, the stress intensity factor calculated by two kinds of XFEM programs developed by ourselves and by commercial code ABAQUS are compared in this work. By comparing the reliability of the stress intensity factor calculation, the accuracy of two programs in different cases is evaluated and the source of error is discussed. A 2-dimensional XFEM example is given to illustrate the computational procedure.

关键词： goal-oriented error estimation extended finite element method fracture mechanics error bounds

Effects of Metal Cations and Counter Anions on the Structural Stability of Isoquinoline-Based Metallo-Supramolecular Cages

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Chinese Journal of Chemistry 2023年第21期41卷 2793-2800页

作者： Zhi Chen Yinghao Xie heng wang Xiujun Yu Xiaopeng Li College of Chemistry and Environmental Engineering Shenzhen UniversityShenzhenGuangdong518060 China Shenzhen University General Hospital Shenzhen University Clinical Medical AcademyShenzhenGuangdong518055 China

Metallo-supramolecular architectures that are constructed by coordination-driven self-assembly have received tremendous attention on account of their diverse yet molecular-level precise structures and broad *** particular,metal cations and counter anions are fundamentally important in terms of self-assembly,characterization and property;however,their effects on the structural stabilities of metallo-supramolecular architectures have seldom been *** address this issue,herein,a series of octahedral metallo-cages that are capable of tolerating with five metal cations(Pd^(2+),Cu^(2+),Ni^(2+),Co^(2+)and Zn^(2+)),and five counter anions(ClO_(4)^(–),OTf^(–),BF_(4)^(–),NTf_(2)^(–)and NO_(3)^(–))are constructed by the coordination-driven self-assembly of a well-designed tritopic isoquinoline-based ligand with corresponding metal *** stability studies show that metal cations and counter anions play a critical role in the stability of the resulting cages depending on their coordination abilities and stacking *** work provides deep insights in the ever-diversifying field of metallo-supramolecular chemistry,and will enable us to design more sophisticated assembled structure with desired function.

关键词： Supramolecular chemistry Structural stability Isoquinoline Octahedral cages Coordination-driven self-assembly

Simulation-based optimization of control policy on multi-echelon inventory system for fresh agricultural products

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International Journal of Agricultural and Biological Engineering 2019年第2期12卷 184-194页

作者： Guangyin Xu Jihao Feng Fenglei Chen heng wang Zhenfeng wang College of Mechanical and Electrical Engineering Henan Agricultural UniversityZhengzhou 450002China Collaborative Innovation Center of Biomass Energy Henan Province.Zhengzhou 450002China Guizhou Province Branch of China National Tobacco Company Guiyang 550000China

As fresh agricultural products are perishable and vulnerable,reducing inventory cost is a strategic target for supply chain *** to design a reliable multi-echelon inventory control policy is still a great ***,the inventory cost of a three-level fresh agricultural products inventory system was firstly mathematically ***,the simulation-based optimization model of the multi-echelon inventory system for fresh agricultural products was proposed by using the Flexsim simulation software and the improved particle swarm optimization ***,the multi-echelon inventory system is simulated based on a large number of survey *** results demonstrate that the proposed simulation-based optimization model of multi-echelon inventory system for fresh agricultural products can provide decision-making and technical support for the formulation of inventory control policy,and also it shows that the modeling of system simulation is an effective method to solve the problem of complex system.

关键词： multi-echelon inventory system simulation-based optimization fresh agricultural products control policy Flexsim simulation software