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Defence Technology（防务技术） 2022年第11期18卷 2065-2073页

作者： Bao-qi Wu Guang-sen wang Xiao-cun Guan Biao Wu National Key Laboratory of Science and Technology on Vessel Integrated Power System Naval University of EngineeringWuhan430033China Jiangsu Automation Research Institute Lianyungang222006China

Electromagnetic coil launch is an important branch of electromagnetic launch(EML)technology,which is suitable for launching anti-torpedo torpedo(ATT).This paper focuses on the EML parameters and the interception probability of the EML two ATTs *** on the launching model of a multi-stage coil launcher,the trajectory model of the ATT and the attacking torpedo,a calculation method for the EML two ATTs salvo parameters is proposed,with the conditions of capture and interception given *** adaptive particle swarm optimization(APSO)algorithm is proposed to calculate the optimal launching parameters,by designing the adaptive inertia weight and time-varying study *** to the analysis of the simulation with Monte Carlo method,EML will improve the interception probability effectively,and the interception probability is affected by the launching *** results demonstrate good performance of the proposed APSO in calculating EML parameters for the two ATTs salvo in certain combat *** of these results are particular regarding the command and decision in the anti-torpedo combat.

关键词： Interception probability Electromagnetic coil launch Anti-torpedo torpedo Adaptive PSO

Influence of modified biochar supported sulfidation of nano-zero-valent-iron(S-nZVI/BC) on nitrate removal and greenhouse gas emission in constructed wetland

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Journal of Environmental Sciences 2023年第3期125卷 568-581页

作者： Fanlong Kong Junru wang Weihao Hou Yuqian Cui Lihua Yu Yi Zhang sen wang College of Environmental Science and Engineering Qingdao UniversityQingdao 266071China Qingdao Environmental Protection Bureau Laixi BranchQingdao 266699China

In this study,the biochar (BC) produced from sawdust,sludge,reed and walnut were used to support sulfidation of nano-zero-valent-iron (S-nZVI) to enhance nitrate NO_(3)^(-) removal and investigate the impact on greenhouse gas *** experiment results showed the S-nZVI/BC(sawdust (2:1,500)),S-n ZVI/BC(sludge (2:1,900)),S-n ZVI/BC(reed (2:1,700)),and S-n ZVI/BC(walnut (2:1,700))respectively improved NO_(3)^(-) removal efficiencies by 22%,20%,3%and0.1%,and the selectivity toward N_(2)by 22%,25%,22%and 18%.S-nZVI uniformly loaded on BC provided electrons for the conversion of NO_(3)^(-) to N_(2)through *** the same time,FeSxlayer was formed on the outer layer of ZVI in the sulfidation process to prevent iron oxidation,so as to improve the electrons utilization efficiency After adding four kinds of S-nZVI/BC into constructed wetlands (CWs),the NO_(3)^(-) removal efficiencies could reach 100%and the N_(2)O emission fluxes were reduced by 24.17%-36.63%.And the average removal efficiencies of TN,COD,TP were increased by 21.9%,-16.5%,44.3%,*** increasing relative abundances of denitrifying bacteria,such as Comamonas and Simplicispira,suggested that S-nZVI/BC could also improve the process of microbial *** addition,different S-nZVI/BC had different effects on denitrification functional genes (narG,nirk,nirS and nos Z genes),methanotrophs (pmoA) and methanogenesis (mcrA).This research provided an effective method to improve NO_(3)^(-) removal and reduce N_(2)O emission in CWs.

关键词： Sulfidation of nano-zero-valent-iron Biochar Nitrate removal Greenhouse gas Constructed wetland

Water model experiments of multiphase mixing in the top-blown smelting process of copper concentrate

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International Journal of Minerals,Metallurgy and Materials 2016年第12期23卷 1369-1376页

作者： Hong-liang Zhao Pan Yin Li-feng Zhang sen wang School of Metallurgical and Ecological Engineering University of Science and Technology BeijingBeijing 100083China Beijing Key Laboratory of Green Recycling and Extraction of Metal Beijing 100083China Chambishi Copper Smelter Ltd. Beijing Representative OfficeBeijing 100029China

We constructed a 1：10 cold water experimental model by geometrically scaling down an Isa smelting furnace. The mixing processes at different liquid heights, lance diameters, lance submersion depths, and gas flow rates were subsequently measured using the conductivity method. A new criterion was proposed to determine the mixing time. On this basis, the quasi-equations of the mixing time as a function of different parameters were established. The parameters of the top-blown smelting process were optimized using high-speed photography. An excessively high gas flow rate or excessively low liquid height would enhance the fluctuation and splashing of liquid in the bath, which is unfavorable for material mixing. Simultaneously increasing the lance diameter and the lance submersion depth would promote the mixing in the bath, thereby improving the smelting efficiency.

关键词： copper smelting multiphase flow mixing water modeling

An unexpected reaction of cyanothioacetamide:Novel preparation of pyrazolo[3,4-b]-pyridine derivatives under MWI

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Chinese Chemical Letters 2008年第6期19卷 643-646页

作者： Xue sen Fan Xia wang Xiao Yan Li School of Chemical and Environmental Sciences Henan Key Laboratory for Environmental Pollution Control Henan Normal University Xinxiang 453007 China

An unexpected multi-component reaction of cyanothioacetarnide with aldehyde and aminopyrazole under MWI was reported. Through this reaction, a series of pyrazolo[3,4-b]-pyridine derivatives was prepared in high yields... 详细信息

关键词： Pyrazolo[3,4-b]-pyridine Microwave irradiation Thioacetamide

Very Short-Term Probabilistic Prediction Method for Wind Speed Based on ALASSO-Nonlinear Quantile Regression and Integrated Criterion

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CSEE Journal of Power and Energy Systems 2023年第6期9卷 2121-2129页

作者： Yan Zhou Yonghui Sun sen wang Linquan Bai Dongchen Hou Rabea Jamil Mahfoud Peng wang the College of Energy and Electrical Engineering Hohai UniversityNanjing 210098China Department of Systems Engineering and Engineering Management the University of North CarolinaCharlotte NC 28223USA

To enhance the performance of the prediction intervals (PIs), a novel very short-term probabilistic prediction method for wind speed via nonlinear quantile regression (NQR) based on adaptive least absolute shrinkage and selection operator (ALASSO) and integrated criterion (IC) is proposed. The ALASSO method is studied for shrinkage of output weights and selection of variables. Furthermore, for the better performance of PIs, composite weighted linear programming (CWLP) is proposed to modify the conventional linear programming cost function of quantile regression (QR), by combining it with Bayesian information criterion (BIC) as an IC to optimize the coefficients of PIs. Then, the multiple fold cross model (MFCM) is utilized to improve the PIs performance. Multistep probabilistic prediction of 15-minute wind speed is performed based on the real wind farm data from the northeast of China. The effectiveness of the proposed approach is validated through the performances' comparisons with conventional methods.

关键词： Composite weighted linear programming least absolute shrinkage and selection operator integrated criterion wind speed

Optimizing Seed Water Content:Relevance to Storage Stability and Molecular Mobility

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Journal of Integrative Plant Biology 2010年第3期52卷 324-331页

作者： Ming Zhang Jia-Jin Zhuo Xu wang sen Wu Xiao-Feng wang Key Laboratory for Genetics and Breeding in Forest Trees and Ornamental Plants Ministry of Education Beijing Forestry University Beijing 100083 China

This research was conducted to determine the optimum moisture content （MC） that gave maximum longevity to seeds. Three species were used to represent seeds with different dry matter reserves, which gives them different sorption properties： maize （Zea mays L.）, elm （Ulmus pumila L.） and safflower （Carthamus tinctorius L.）. The seeds of elm, safflower, and maize embryos with MC ranging from 0.00- 0.15 g H2O/g dry weight （DW） were stored at 35℃ for different periods of time. The results showed that the optimum MC for seed and embryo storage varied between species （0.057 g H20/g DW for maize embryos, 0.045 g H20/g DW for elm, and 0.02 g H2O/g DW for safflower）. Drying below this optimum MC increased the aging rate and there were detrimental effects of drying. The relative humidity corresponding to optimum MC in embryos of maize, elms and safflower was about 15%, 12% and 7% respectively, according to the lipid composition of the embryos. The data provided confirmatory evidence that molecular mobility （△Azz） in elms, maize and safflower embryos was compatible with the optimum moisture content.

关键词： no english key word

AI-Enhanced Constellation Design for NOMA System: A Model Driven Method

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China Communications 2020年第11期17卷 100-110页

作者： sen wang Hanxiao Yu Yifei Yuan Guangyi Liu Zesong Fei Future Mobile Technology Lab China Mobile Research InstituteBeijing 100053China Beijing Institute of Technology Beijing 100081China

Grant-free Non-orthogonal Multiple Access(GF-NOMA)is a promising technology for massive access users and sporadic small-packet transmission for Beyond the 5th Generation mobile communication system(B5G)/the 6th Generation mobile communication system(6G).One of the key aspects in GF-NOMA system is the signature/constellation ***,due to the channel variation and random activation of users,conventional optimization approaches seem unsuitable for such complex *** this paper,as an initial attempt,we propose a human intelligence(HI)-guided artificial intelligence(AI)-enhanced signature/constellation design *** separate design of modulation and power allocation inspired by prior knowledge,the proposed deep neuron network(DNN)for NOMA signature/constellation design not only has smaller size of DNN and less training data,but also has stronger *** the last section,via simulations we demonstrate that in terms of bit error rate,the proposed scheme can achieve significant performance gain over the conventional NOMA schemes.

关键词： NOMA system DNN constellation design power allocation

A shadow- eliminated vegetation index (SEVI) for removal of self and cast shadow effects on vegetation in rugged terrains

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International Journal of Digital Earth 2019年第9期12卷 1013-1029页

作者： Hong Jiang sen wang Xiaojie Cao Chenghai Yang Zhaoming Zhang Xiaoqin wang Key Laboratory of Spatial Data Mining&Information Sharing of MOE and Fujian Spatial Information Research CenterFuzhou UniversityFuzhouPeople’s Republic of China Aerial Application Technology Research Unit USDAAgricultural Research ServiceCollege StationTXUSA Chinese Academy of Sciences Institute of Remote Sensing and Digital EarthBeijingPeople’s Republic of China

The effect of terrain shadow, including the self and cast shadows, is one ofthe main obstacles for accurate retrieval of vegetation parameters byremote sensing in rugged terrains. A shadow- eliminated vegetation index(SEVI) was developed, which was computed from only red and nearinfrared top-of-atmosphere reflectance without other heterogeneous dataand topographic correction. After introduction of the conceptual modeland feature analysis of conventional wavebands, the SEVI was constructedby ratio vegetation index (RVI), shadow vegetation index (SVI) andadjustment factor (f (Δ)). Then three methods were used to validate theSEVI accuracy in elimination of terrain shadow effects, including relativeerror analysis, correlation analysis between the cosine of solar incidenceangle (cosi) and vegetation indices, and comparison analysis between SEVIand conventional vegetation indices with topographic correction. Thevalidation results based on 532 samples showed that the SEVI relativeerrors for self and cast shadows were 4.32% and 1.51% respectively. Thecoefficient of determination between cosi and SEVI was only 0.032 and thecoefficient of variation (std/mean) for SEVI was 12.59%. The results indicatethat the proposed SEVI effectively eliminated the effect of terrain shadowsand achieved similar or better results than conventional vegetation indiceswith topographic correction.

关键词： Vegetation indices shadoweliminated vegetation index(SEVI) terrain shadow effect self shadow cast shadow

Bio-inspired polygonal skeleton structure for vibration isolation:Design,modelling,and experiment

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Science China(Technological Sciences) 2020年第12期63卷 2617-2630页

作者： YAN Ge wang sen ZOU HongXiang ZHAO LinChuan GAO QiuHua ZHANG WenMing State Key Laboratory of Mechanical System and Vibration School of Mechanical EngineeringShanghai Jiao Tong UniversityShanghai 200240China Shanghai Aerospace Control Technology Institute Shanghai 201109China

Inspired by the safe landing of a cat falling from a high altitude,a bio-inspired polygonal skeleton(BIPS) structure is proposed,and its nonlinear characteristics are systematically studied to explore its potential application in the suppression of vibration. The polygon is formed by the skeleton structure of the cat’s entire body and the ground. The BIPS system consists of two symmetrical bionic legs with three robs(as skeleton) and four horizontal springs(as muscle). Two bionic legs are connected through the bearing platform(as spine),which could adjust the distance between the two bionic legs. A theoretical model is developed to characterize its stiffness nonlinearity through geometrical and mechanical analysis. Parameter analysis reveals that the BIPS structure has diverse stiffness,including nonlinear positive stiffness and negative stiffness. By imitating adjustment of leg posture and telescopic function of the spine(control the distance between legs),these flexible stiffness properties can be adjusted by structure parameters. In addition,the load capacity and working range can also be designed by the length of the bars,the initial angle,the mounting position,and the spring stiffness. The experimental setup is established,and the vibration isolation performance under various excitation is tested. The experimental results verify the accuracy of the dynamic model and also show that the proposed BIPS structure can suppress the vibration effectively under a variety of excitations. These peculiarities may provide potential possibility of an innovative approach to passive vibration control and isolation.

关键词： bio-inspired polygonal skeleton structure nonlinear stiffness passive vibration isolator

Joint Source-Channel Coding for 6G Communications

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China Communications 2022年第3期19卷 101-115页

作者： Yanfei Dong Jincheng Dai Kai Niu sen wang Yifei Yuan The Key Laboratory of Universal Wireless Communications Ministry of EducationBeijing University of Posts and TelecommunicationsBeijing 100876China China Mobile Research Institute Beijing 100876China

In order to provide ultra low-latency and high energy-efficient communication for intelligences,the sixth generation(6G)wireless communication networks need to break out of the dilemma of the depleting gain of the separated optimization *** this context,this paper provides a comprehensive tutorial that overview how joint source-channel coding(JSCC)can be employed for improving overall system *** the purpose,we first introduce the communication requirements and performance metrics for ***,we provide an overview of the source-channel separation theorem and why it may not hold in practical *** addition,we focus on two new JSCC schemes called the double low-density parity-check(LDPC)codes and the double polar codes,respectively,giving their detailed coding and decoding processes and corresponding performance *** a nutshell,this paper constitutes a tutorial on the JSCC scheme tailored to the needs of future 6G communications.

关键词： 6G joint source and channel coding doubel LDPC codes doubel polar codes