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| 1 | Laser joining of CFRTP to titanium alloy via laser surface texturing显示文摘Grid pattern was textured on Ti-6 Al-4 V alloy(TC4)substrate surface by nanosecond laser system.Laser joining of carbon fiber reinforced thermoplastic composite(CFRTP)to TC4 joints were performed,and the effect of texture grid depth was investigated.The contact angle of molten CFRTP on textured TC4 surface was measured and the tensile-shear force was tested.The fracture surface and interface morphology were observed.The results indicated that the wettability of molten CFRTP on TC4 surface improved remarkably after laser textured TC4.Shear force of CFRTP/TC4 joints was increased by 156%after laser textured TC4 surface.When the depth of grid was deeper than 100μm,contact angle increased and incomplete filling of molten CFRTP in grid occurred,the shear force thus decreased gradually.Resin-carbon fibers mixture was adhered on the fracture surface of TC4,and the variation tendency of adhesion ratio was consistent with that of shear force.TC4 matrix was exfoliated from substrate and adhered at the fracture surface of CFRTP,indicating stronger mechanical interlocking occurred at the joining interface after laser textured TC4 surface.Beside mechanical interlocking,compound layer consisted of CTi_(0.42)V_(1.58)carburization phase was also confirmed at interface,suggesting that chemical bonding also occurred at the joining interface. | Caiwang TAN Jianhui SU Ziwei FENG Yifan LIU Bo CHEN Xiaoguo SONG | 2021 | Chinese Journal of Aeronautics2021，34，5： | 11 |
| 2 | A review:Photonics devices,architectures,and algorithms for optical neural computing显示文摘The explosive growth of data and information has motivated various emerging non-von Neumann computational approaches in the More-than-Moore era.Photonics neuromorphic computing has attracted lots of attention due to the fascinating advantages such as high speed,wide bandwidth,and massive parallelism.Here,we offer a review on the optical neural computing in our research groups at the device and system levels.The photonics neuron and photonics synapse plasticity are presented.In addition,we introduce several optical neural computing architectures and algorithms including photonic spiking neural network,photonic convolutional neural network,photonic matrix computation,photonic reservoir computing,and photonic reinforcement learning.Finally,we summarize the major challenges faced by photonic neuromorphic computing,and propose promising solutions and perspectives. | Shuiying Xiang Yanan Han Ziwei Song Xingxing Guo Yahui Zhang Zhenxing Ren Suhong Wang Yuanting Ma Weiwen Zou Bowen Ma Shaofu Xu Jianji Dong Hailong Zhou Quansheng Ren Tao Deng Yan Liu Genquan Han Yue Hao | 2021 | Journal of Semiconductors2021，42，2： | 7 |
| 3 | Recent progress of integrated circuits and optoelectronic chips显示文摘Integrated circuits(ICs)and optoelectronic chips are the foundation stones of the modern information society.The IC industry has been driven by the so-called'Moore's law'in the past 60 years,and now has entered the post Moore's law era.In this paper,we review the recent progress of ICs and optoelectronic chips.The research status,technical challenges and development trend of devices,chips and integrated technologies of typical IC and optoelectronic chips are focused on.The main contents include the development law of IC and optoelectronic chip technology,the IC design and processing technology,emerging memory and chip architecture,brain-like chip structure and its mechanism,heterogeneous integration,quantum chip technology,silicon photonics chip technology,integrated microwave photonic chip,and optoelectronic hybrid integrated chip. | Yue HAO Shuiying XIANG Genquan HAN Jincheng ZHANG Xiaohua MA Zhangming ZHU Xingxing GUO Yahui ZHANG Yanan HAN Ziwei SONG Yan LIU Ling YANG Hong ZHOU Jiangyi SHI Wei ZHANG Min XU Weisheng ZHAO Biao PAN Yangqi HUANG Qi LIU Yimao CAI Jian ZHU Xin OU Tiangui YOU Huaqiang WU Bin GAO Zhiyong ZHANG Guoping GUO Yonghua CHEN Yong LIU Xiangfei CHEN Chunlai XUE Xingjun WANG Lixia ZHAO Xihua ZOU Lianshan YAN Ming LI | 2021 | Science China(Information Sciences)2021，64，10： | 7 |
| 4 | Large-scale blow spinning of heat-resistant nanofibrous air filters显示文摘Particulate matter(PM)pollution has become a serious problem worldwide and various kinds of nanofibrous filters aiming to solve the problem have been developed.It is urgent to remove PM from high-temperature pollution sources,such as industrial emissions,coal furnaces,and automobile exhaust gases.However,filtration at pollution sources remains challenging because most existing air filters are not resistant to high temperature.Herein,heat-resistant polyimide(PI)nanofibrous air filters are fabricated via a simple and scalable solution blow-spinning method.These air filters show excellent thermal stability at high temperature up to 420℃.They exhibit a filtration efficiency as high as 99.73%at ambient temperature and over 97%at 300℃.In addition,a field test shows that the filters remove>97%of PM from the car exhaust fumes.Hence,the blow-spun PI nanofibrous membranes combined with the facile preparation strategy have great potential in high temperature air filtration fields and other similar applications such as water purification and protein separation. | Ziwei Li Jianan Song Yuanzheng Long Chao Jia Zhenglian Liu Lei Li Cheng Yang Junchen Liu Sen Lin Haiyang Wang Yibo Liu Minghao Fang Hui Wu | 2020 | Nano Research2020，13，3： | 6 |
| 5 | Room-temperature production of silver-nanofiber film for large-area, transparent and flexible surface electromagnetic interference shielding显示文摘A kind of pollution known as electromagnetic interference(EMI),which results from ubiquitous usage of various electronic communication and military radar equipment,has been receiving increasing attention recently.However,large-area EMI shielding on transparent and/or curved surfaces,including building windows,curved glass wall,and special requirements spaces(SRSs),remains hard to achieve.In this paper,a silver nanofiber(AgNF)based flexible and transparent EMI shielding film was successfully assembled via a room-temperature roll-to-roll production method.For transparent application scenario,AgNF with 89%transmittance in visible range and 1μm thickness shows~20 dB shielding efficiency(EMI SE).On the other hand,total shielding(>50 dB)is obtained when the thickness of AgNF increases to 10μm,while its transmittance in visible range remains higher than 75%.Considering the facile and scale-free production technology,this material can be readily applied in large-scale,transparent,and/or SRSs EMI shielding. | Sen Lin Haiyang Wang Fan Wu Qingmin Wang Xiaopeng Bai Di Zu Jianan Song Dong Wang Zhenglian Liu Ziwei Li Nian Tao Kai Huang Ming Lei Bo Li Hui Wu | 2019 | npj Flexible Electronics2019，3，1： | 4 |
| 6 | Investigation of microstructure changes in Al_(2)O_(3)-YSZ coatings and YSZ coatings and their effect on thermal cycle life显示文摘Yttria-stabilized zirconia(YSZ)coatings and Al_(2)O_(3)–YSZ coatings were prepared by atmospheric plasma spraying(APS).Their microstructural changes during thermal cycling were investigated via scanning electron microscopy(SEM)equipped with electron backscatter diffraction(EBSD)and X-ray diffraction(XRD).It was found that the microstructure and microstructure changes of the two coatings were different,including crystallinity,grain orientation,phase,and phase transition.These differences are closely related to the thermal cycle life of the coatings.There is a relationship between crystallinity and crack size.Changes in grain orientation are related to microscopic strain and cracks.Phase transition is the direct cause of coating failure.In this study,the relationship between the changes in the coating microstructure and the thermal cycle life is discussed in detail.The failure mechanism of the coating was comprehensively analyzed from a microscopic perspective. | Meiqi DAI Xuemei SONG Chucheng LIN Ziwei LIU Wei ZHENG Yi ZENG | 2022 | Journal of Advanced Ceramics2022，11，2： | 4 |
| 7 | Metal-Organic Framework Materials for Electrochemical Supercapacitors显示文摘Exploring new materials with high stability and capacity is full of challenges in sustainable energy conversion and storage systems.Metal-organic frameworks(MOFs),as a new type of porous material,show the advantages of large specific surface area,high porosity,low density,and adjustable pore size,exhibiting a broad application prospect in the field of electrocatalytic reactions,batteries,particularly in the field of supercapacitors.This comprehensive review outlines the recent progress in synthetic methods and electrochemical performances of MOF materials,as well as their applications in supercapacitors.Additionally,the superiorities of MOFs-related materials are highlighted,while major challenges or opportunities for future research on them for electrochemical supercapacitors have been discussed and displayed,along with extensive experimental experiences. | Ziwei Cao Roya Momen Shusheng Tao Dengyi Xiong Zirui Song Xuhuan Xiao Wentao Deng Hongshuai Hou Sedat Yasar Sedar Altin Faith Bulut Guoqiang Zou Xiaobo Ji | 2022 | Nano-Micro Letters2022，14，11： | 4 |
| 8 | Explore the QCD phase transition phenomena from a multiphase transport model显示文摘We study the phase structure of QCD matter in the framework of a multiphase transport model by implementing a strong local parton density fluctuation scenario. Our calculations on the beam energy dependence of net-proton high moment show that local parton density fluctuation only has a small effect. But it becomes important when all baryons are included. We then study the effect on elliptic flow and find that an enhanced local parton density fluctuation leads to a significant effect on protons but a small effect on pions. Our study provides a reference of transport dynamics on QCD phase transition phenomena and will be relevant for the upcoming phase II of the beam energy scan program at RHIC. | XiaoHai Jin JinHui Chen ZiWei Lin GuoLiang Ma YuGang Ma Song Zhang | 2019 | Science China(Physics,Mechanics & Astronomy)2019，62，1： | 2 |
| 9 | Pattern recognition in multi-synaptic photonic spiking neural networks based on a DFB-SA chip显示文摘Spiking neural networks(SNNs)utilize brain-like spatiotemporal spike encoding for simulating brain functions.Photonic SNN offers an ultrahigh speed and power efficiency platform for implementing high-performance neuromorphic computing.Here,we proposed a multi-synaptic photonic SNN,combining the modified remote supervised learning with delayweight co-training to achieve pattern classification.The impact of multi-synaptic connections and the robustness of the network were investigated through numerical simulations.In addition,the collaborative computing of algorithm and hardware was demonstrated based on a fabricated integrated distributed feedback laser with a saturable absorber(DFB-SA),where 10 different noisy digital patterns were successfully classified.A functional photonic SNN that far exceeds the scale limit of hardware integration was achieved based on time-division multiplexing,demonstrating the capability of hardware-algorithm co-computation. | Yanan Han Shuiying Xiang Ziwei Song Shuang Gao Xingxing Guo Yahui Zhang Yuechun Shi Xiangfei Chen Yue Hao | 2023 | Opto-Electronic Science2023，2，9： | 1 |
| 10 | Mass Production of Ultrafine Fibers by a Versatile Solution Blow Spinning Method显示文摘CONSPECTUS:Ultrafine fiber materials have shown great application prospects in many fields due to their superior properties,including large specific surface area,high porosity,low density,and good mechanical flexibility.Various spinning methods have been developed to prepare ultrafine fiber materials,including electrospinning,solution blow spinning(SBS),centrifugal spinning,melt-blowing,etc.Among them,SBS combines the merits of electrospinning and melt-blowing.Unlike electrospinning,SBS uses a high-speed airflow as the driving force to stretch the spinning solution,and solvent evaporates rapidly in the process of liquid flow movement,thus obtaining ultrafine fibers.Compared with other spinning methods,SBS has many advantages,including simple and safe process,high efficiency,suitability for a wider range of solution systems,controllability of fiber structure and diameter,etc.Since its development in 2009,SBS has received widespread attention and has become an efficient and versatile tool for fabricating various ultrafine fiber materials with controlled microstructures and morphologies.Solution blow spun fibers can be assembled into a variety of configurations,including sponges,mats,papers,and films.The thickness of the fiber materials also can be easily regulated,which is an important advantage of SBS over electrospinning.The various forms of the blow spun fibers enable them to have a wide range of applications in environmental remediation,flexible electronic devices,energy storage and conversion,and biomedicine,among others.In this Account,we review the recent progress of SBS and mainly focus on our group’s contributions to this technology.We begin with an introduction to the principles and setup of SBS,including(1)the mechanism of fiber formation from spinning solution under the action of airflow;(2)the effects of spinning solution parameters(concentration and viscosity),processing parameters(gas pressure,feeding rate and working distance),and ambient conditions on the fiber morphology;and(3)the operation modes and development progress of SBS equipment.Then,we review the latest developments of fiber materials prepared by SBS,including polymer fibers,ceramic fibers,carbon fibers,metal fibers,and polymer-based composite fibers.After that,we discuss the application progress of blow spun fibers in the fields of air filtration,water treatment,sound absorption,electromagnetic interference shielding,flexible electronic devices,high temperature thermal insulation,and uranium extraction.In the final section,we offer some remarks on the challenges,opportunities,and future development directions of SBS technology,especially pointing out the problems and research directions for the engineering of SBS.We envision that this Account will attract more researchers’attention to SBS technology,thus greatly promoting the development of this technology. | Chao Jia Lei Li Jianan Song Ziwei Li Hui Wu | 2021 | Accounts of Materials Research2021，2，6： | 1 |
| 11 | Photonic integrated neuro-synaptic core for convolutional spiking neural network显示文摘Neuromorphic photonic computing has emerged as a competitive computing paradigm to overcome the bottlenecks of the von-Neumann architecture.Linear weighting and nonlinear spike activation are two fundamental functions of a photonic spiking neural network(PSNN).However,they are separately implemented with different photonic materials and devices,hindering the large-scale integration of PSNN.Here,we propose,fabricate and experimentally demonstrate a photonic neuro-synaptic chip enabling the simultaneous implementation of linear weighting and nonlinear spike activation based on a distributed feedback(DFB)laser with a saturable absorber(DFB-SA).A prototypical system is experimentally constructed to demonstrate the parallel weighted function and nonlinear spike activation.Furthermore,a fourchannel DFB-SA laser array is fabricated for realizing matrix convolution of a spiking convolutional neural network,achieving a recognition accuracy of 87%for the MNIST dataset.The fabricated neuro-synaptic chip offers a fundamental building block to construct the large-scale integrated PSNN chip. | Shuiying Xiang Yuechun Shi Yahui Zhang Xingxing Guo Ling Zheng Yanan Han Yuna Zhang Ziwei Song Dianzhuang Zheng Tao Zhang Hailing Wang Xiaojun Zhu Xiangfei Chen Min Qiu Yichen Shen Wanhua Zheng Yue Hao | 2023 | Opto-Electronic Advances2023，6，11： | 1 |
| 12 | Research on Dynamic Change of Regional Cultivated Land Quality and Its Influence Factors显示文摘According to the reason of quality change,cultivated land is divided into four change types: decrease,increase,land construction project and gradual change. Farmland grading factor method is used to evaluate the quality of cultivated land in Zhengzhou City. The results show that(1) the quality of cultivated land in Zhengzhou City has slightly increased during the study period. Due to the decrease in the amount of cultivated land,the production capacity has declined.(2) The impact of different types of cultivated land change on the quality of regional cultivated land is in the order of gradual change> decrease > increase > land construction project.(3) Zhengzhou City is able to maintain the quality of regional cultivated land through new cultivated land and project construction,but fails to maintain the production capacity. By analyzing the mechanism of regional cultivated land quality change in different types,the relationship between quality changes in various types of areas and overall quality changes could be analyzed,and it could provide policy recommendations for managers to formulate farmland quality and capacity protection,with significant application value. | Ziwei WANG Lingchao WANG Yanhua SONG Yan TIAN | 2021 | Meteorological and Environmental Research2021，12，5： | 0 |
| 13 | Study on the Theory and Method of Real Estate Property Right Appraisal显示文摘This paper first introduces the overview of real estate appraisal theory,the basic situation of real estate appraisal,the basic principles and characteristics of real estate appraisal,and three main appraisal methods.On this basis,the specific use scope of each method,the meaning of each parameter,and the influencing factors are analyzed.Then,based on the in-depth study of various existing appraisal theories and methods,a new appraisal method is proposed:the appraisal analysis method based on fuzzy analytic hierarchy process. | Chenguang YUAN Ziwei WANG Yanhua SONG Yan TIAN Jianbo YANG | 2022 | Meteorological and Environmental Research2022，13，6： | 0 |
| 14 | Early Warning of Cultivated Land Quality Based on Multiple Indicators显示文摘At present,the quality protection and early warning of cultivated land in China are actually based on the increase and decrease of the quantity of cultivated land and the change of its quality.The early warning of cultivated land quality based on this is easy to cause the problem of missing and wrong alarm.Based on the quality and productivity change of regional cultivated land,early warning on the regional cultivated land quality is conducted in this study respectively,and the results of the two early warning are compared.Moreover,a multi-indicator cultivated land quality early warning based on the quality change,productivity change and auxiliary indicators is proposed.The results show that:early warning of cultivated land quality based on quality and productivity change of cultivated land has certain limitations.Based on multi-indicator early warning,the number of counties with heavy,medium and light warnings in Henan Province is 52,8 and 11 respectively.The multi-indicator early warning result of cultivated land quality is more accurate,which can provide a basis for cultivated land protection and management assessment,and has great application value. | Ziwei WANG Lingchao WANG Yanhua SONG Yan TIAN | 2022 | Meteorological and Environmental Research2022，13，6： | 0 |
| 15 | Study on Division Method of Quality Monitoring Control Area Based on Comprehensive Cultivated Land Attribute显示文摘The quality change of cultivated land resources requires the scientific deployment of monitoring areas.In this study,Yuzhou City is taken as an example to divide the quality monitoring control areas through the study of natural quality,utilization level,income level,and utilization characteristics,etc.Compared with the traditional administrative unit division or cultivated land quality division method,the regional homogeneity of this study is stronger,and there are quality differences between regions.It provides precondition and precision guarantee for the monitoring of cultivated land quality. | Ziwei WANG Lingchao WANG Yanhua SONG Chenguang YUAN Lei WANG Xihui YANG | 2022 | Meteorological and Environmental Research2022，13，6： | 0 |
| 16 | Mean-field effects on matter and antimatter elliptic flow显示文摘We report our recent work on mean-field potential effects on the elliptic flows of matters and antimatters in heavy ion collisions leading to the production of a baryon-rich matter.Within the framework of a multiphase transport(AMPT) model that includes both initial partonic and final hadronic interactions,we have found that including mean-field potentials in the hadronic phase leads to a splitting of the elliptic flows of particles and their antiparticles,providing thus a plausible explanation of the different elliptic flows between p and anti-p,K+and K-,and π+ and π- observed by the STAR Collaboration in the Beam Energy Scan(BES) program at the Relativistic Heavy Ion Collider(RHIC).Using a partonic transport model based on the Nambu-Jona-Lasinio(NJL) model,we have also studied the effect of scalar and vector mean fields on the elliptic flows of quarks and antiquarks in these collisions.Converting quarks and antiquarks at hadronization to hadrons via the quark coalescence model,we have found that the elliptic flow differences between particles and antiparticles also depend on the strength of the quark vector coupling in baryon-rich quark-gluon plasma,providing thus the possibility of extracting information on the latter's properties from the BES program at RHIC. | KO Cheming CHEN Liewen GRECO Vincenzo LI Feng LIN Ziwei PLUMARI Salvatore SONG Taesoo XU Jun | 2013 | Nuclear Science and Techniques2013，24，5： | 0 |
| 17 | A large-area AgNW-modified textile with high-performance electromagnetic interference shielding显示文摘Manufacturing a flexible,light,large-area,and high-efficiency electromagnetic shielding materials in a straightforward and cost-effective manner presently remains a significant challenge.In this work,we propose a conductive network design and verify its electromagnetic interference(EMI)shielding effectiveness(SE)by simulation.Using the structure and parameters obtained by simulation,we prepare a flexible EMI shielding material using silver nanowires(AgNWs)/polyvinyl butyral(PVB)ethanol solution and textile substructure via a facile immersing method.In the frequency range of 5-18 GHz,the AgNWs/PVB textile with 1.4 mm thickness achieves an EMI SE of 59 dB,which exceeds the requirements for commercial applications.Due to the low density of 56 mg/cm^(3),specific shielding effectiveness(SSE)of this material reaches 1053 dB m^(3)/g.It is found that the AgNWs/PVB textile is more resistant to washing with water and oxidation than AgNWs textile without a PVB protector.As a result,the conductivity of AgNWs/PVB textile exhibits no change after washing with water and varies slightly after being kept in hot air.We find that a signal monitor is unable to detect a signal emitted by a mobile phone from a jacket lined with AgNWs/PVB textile.AgNWs/PVB textile with these properties can be mass-produced as high-efficiency EMI shielding material for commercial applications. | Junchen Liu Sen Lin Kai Huang Chao Jia Qingmin Wang Ziwei Li Jianan Song Zhenglian Liu Haiyang Wang Ming Lei Hui Wu | 2020 | npj Flexible Electronics2020，4，1： | 0 |
| 18 | Study on'Same Land,Same Right,Same Price'of Collective Commercial Construction Land and State-owned Land显示文摘Taking Changyuan City of Henan Province,a pilot city of collective commercial construction land reform,as the research object,this paper analyzes the scientific connotation of'same land,same right,same price'of collective commercial construction land and state-owned land in the unified urban-rural construction land market system,and how to realize'same land,same right,same price'.The results show that in order to realize the fair entry of collective construction land into the market,it must base on scientific use control,unify the urban and rural construction land market and adhere to the guidance of market mechanism,and finally realize the sustainable development of the land market. | Chenguang YUAN Ziwei WANG Yanhua SONG Lei WANG Xihui YANG | 2022 | Meteorological and Environmental Research2022，13，5： | 0 |
| 19 | Compositional characteristics of sediment from Jiaozhou Bay in North China and the implication to the provenance显示文摘Rare earth elements(REEs)can be used to trace source materials and identify their provenances,because of significant conservation and immobility during chemical alteration processes after erosion of materials from the provenance.This study focused on the temporal variation of REEs for columnar sediments from the mouth of Jiaozhou Bay in North China to understand the potential controls for the geochemical variations of sediments.Through extraction experiments,we identified that the residual fraction is the main host for REEs compared with other fractions(i.e.,exchangeable and carbonate fraction,easily reducible oxides fraction,reducible oxides fraction,magnetite fraction).REE ratios(e.g.,La_(N)/Sm_(N)and La_(N)/Yb_(N);N:normalized by chondrite)lack correlations with grain size or the chemical index of alteration(CIA),which is correlated with major elements.All these indicate that these REE variations reflect the varying contribution of source materials from different provenances instead of grain size or chemical weathering effects.REE ratios(e.g.,La_(N)/Sm_(N)and La_(N)/Yb_(N))remain relatively constant until the depth of roughly 40 cm(equivalent to the year 1995),and show obvious changes beyond this depth.Compared REE characteristics of Jiaozhou Bay with those of neighboring rivers and bedrocks,the relative contributions of Dagu River-Jiaolai River,and Licun River may have been increased during the sedimentary processes,which could be caused by the construction of reservoir and related change of aquaculture(e.g.,rapid accumulation of organic materials). | Ziwei SUN Jin LIU Yue ZHANG Jinming SONG Yuanyuan XIAO Huamao YUAN Ning LI Xuegang LI | 2023 | Journal of Oceanology and Limnology2023，41，5： | 0 |
| 20 | Design of Trinity Framework for Cultivated Land Protection显示文摘Starting with the goals and tasks of quantity,quality and ecological protection in different scales,this paper constructs a'trinity'framework of cultivated land protection system,and puts forward the key points of cultivated land protection in different scales.Finally,a preliminary evaluation is made on the quantity,quality and ecological protection of cultivated land on a macro scale in China. | Ziwei WANG Yan TIAN Lingchao WANG Yanhua SONG | 2021 | Asian Agricultural Research2021，13，11： | 0 |
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