检索结果-南通市图书馆

Digital Twin Modeling and Simulation Optimization of Transmission Front and Middle Case Assembly Line

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Computer Modeling in Engineering & Sciences 2024年第6期139卷 3233-3253页

作者： Xianfeng Cao Meihua Yao yahui zhang Xiaofeng Hu Chuanxun Wu Process Research Institution China National Heavy Duty Truck Group Co.Ltd.Jinan250100China Transmission Factory China National Heavy Duty Truck Group Co.Ltd.Jinan250100China G Intelligent Manufacturing Research Center Institute of Marine EquipmentShanghai Jiao Tong UniversityShanghai200240China Institute of Intelligent Manufacturing and Information Engineering School of Mechanical EngineeringShanghai Jiao Tong UniversityShanghai200240China

As the take-off of China’s macro economy,as well as the rapid development of infrastructure construction,real estate industry,and highway logistics transportation industry,the demand for heavy vehicles is increasing rapidly,the competition is becoming increasingly fierce,and the digital transformation of the production line is *** one of themost important components of heavy vehicles,the transmission front andmiddle case assembly lines have a high degree of automation,which can be used as a pilot for the digital transformation of *** ensure the visualization of digital twins(DT),consistent control logic,and real-time data interaction,this paper proposes an experimental digital twin modeling method for the transmission front and middle case assembly ***,theDT-based systemarchitecture is designed,and theDT model is created by constructing the visualization model,logic model,and data model of the assembly ***,a simulation experiment is carried out in a virtual space to analyze the existing problems in the current assembly ***,some improvement strategies are proposed and the effectiveness is verified by a new simulation experiment.

关键词： Transmission front and middle case assembly line digital twin(DT) simulating optimization intelligent manufacturing

Recycling of waste aluminum scraps to fabricate sulfidated zero-valent iron-aluminum particles for enhanced chromate removal

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Environmental Sciences 2024年第4期138卷 650-659页

作者： yahui zhang Liguo zhang Jiajia Zeng Shuqun Xu Jianyu Pan Wenzhuo Huang Jianliang Sun Feng Jiang Guangdong Provincial Key Laboratory of Chemical Pollution and Environmental Safety&MOE Key Laboratory of Theoretical Chemistry of Environment School of EnvironmentSouth China Normal UniversityGuangzhou 510006China Guangdong Provincial Key Lab of Environmental Pollution Control and Remediation Technology School of Environmental Science&EngineeringSun Yat-Sen UniversityGuangzhou 510275China

Massive waste aluminum scraps produced from the spent aluminum products have high electron capacity and can be recycled as an attractive alternative to materials based on zerovalent iron(Fe^(0))for the removal of oxidative contaminants from *** study thus proposed an approach to fabricate micron-sized sulfidated zero-valent iron-aluminum particles(S-Al^(0)@Fe^(0))with high reactivity,electron selectivity and capacity using recycled waste aluminum scraps.S-Al^(0)@Fe^(0)with a three-layer structure contained zero-valent aluminum(Al^(0))core,Fe^(0) middle layer and iron sulfide(FeS)*** rates of chromate(Cr(Ⅵ))removal by S-Al^(0)@Fe^(0)at pH 5.0-9.0 were 1.6-5.9 times greater than that by sulfidated zero-valent iron(S-Fe^(0)).The Cr(Ⅵ)removal capacity of S-Al^(0)@Fe^(0)was 8.2-,11.3-and 46.9-fold greater than those of S-Fe0,zero-valent iron-aluminum(Al^(0)-Fe^(0))and Fe^(0),*** chemical cost of S-Al^(0)@Fe^(0) for the equivalent Cr(Ⅵ)removal was 78.5%lower than that of S-Fe^(0).Negligible release of soluble aluminum during the Cr(Ⅵ)removal was *** significant enhancement in the reactivity and capacity of S-Al^(0)@Fe^(0)was partially ascribed to the higher reactivity and electron density of the Al0core than Fe^(0).More importantly,S-Al^(0)@Fe^(0) served as an electric cell to harness the persistent and selective electron transfer from the Al^(0)-Fe^(0) core to Cr(Ⅵ)at the surface via coupling Fe^(0)-Fe^(2+)-Fe^(3+)redox cycles,resulting in a higher electron utilization ***,S-Al^(0)@Fe^(0) fabricated using recycled waste aluminum scraps can be a cost-effective and environmentally-friendly alternative to S-Fe^(0) for the enhanced removal of oxidative contaminants in industrial wastewater.

关键词： Recycled waste aluminum scraps Oxidative contaminants Cr(Ⅵ)reduction Sulfidated Al^(0)@Fe^(0)particle Electron transfer

The 3^(rd) Xihua Chemistry and Biomedicine Forum

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2024年第2期35卷 1-2页

作者： yahui zhang Zhouyu Wang Leyong Wang Xiaoqi Yu Department of Chemistry School of ScienceXihua UniversityChengdu 610039China Sichuan Engineering Research Center for Molecular Targeted Diagnostic&Therapeutic Drugs Chengdu 610039China Asymmetric Synthesis and Chiral Technology Key Laboratory of Sichuan Province Chengdu 610039China Jiangsu Key Laboratory of Advanced Organic Materials School of Chemistry and Chemical EngineeringNanjing UniversityNanjing 210023China

Serious diseases,particularly cancer,consistently pose significant threats to both national health and economic development[1].The cancer diagnosis methods such as fluorescent probes[2,3],as well as treatment techniques including photodynamic treatments[4]and targeted drugs[5]have attracted much attention in recent *** development and practical application of these methods have become focal points within research *** on this,the 3rd Xihua Chemistry and Biomedicine Forum(XHCBF)was successfully convened by Xihua University in Chengdu from 3 to 6 July,2023.

关键词： diagnosis drugs treatment Forum

Changes in human settlement environments and their drivers in valley cities located in arid and semi-arid regions:A case study of Lanzhou in Western China

在线全文

学校读者我要写书评

暂无评论

Research in Cold and Arid Regions 2024年第3期16卷 149-158页

作者： Rong Zhu YouYan Jiang Bo Wang yahui zhang Gansu Institute of Architectural Design and Research LanzhouGansu 730000China College of Earth and Environmental Sciences Lanzhou UniversityLanzhouGansu 730000China Lanzhou Regional Climate Center LanzhouGansu 730020China School of Human Settlements and Civil Engineering Xi’An Jiaotong UniversityXi’AnShanxi 712000China

Development of urban human settlement environments(HSEs)is an integral part of promoting high-quality and sustainable regional development and constructing a beautiful *** city of Lanzhou,located at the geometric center of China,is the only provincial capital traversed by the Yellow *** the constraints posed by the valley topography and the need for economic development,the development of this HSE,which is located within an arid region,poses considerable ***,an understanding of the evolution of HSEs and drivers of changes in them contributes to high-quality,sustainable urban development in arid and semi-arid re*** analytical model was developed using the parameters of relief degree of land surface,human comfort days,the land cover index,nighttime light index,and *** model was used in combination with population density and the gross domestic product to analyze the spatial distribution of Lanzhou's HSE and its *** results showed that landscapes in Lanzhou underwent significant changes between 2000 and 2022,with an increase in building-up land(+0.946%),cultivated land(+0.134%),and forest land(+0.018%)and a decrease in grassland(-1.10%).There was significant outward expansion of the main urban zone of Lanzhou and of various county towns,with the increase in building-up land being most *** this period,there were significant changes in the periphery of the core urban area and county towns in Lanzhou,with decreases moving from the urban center(the highest value)to the surrounding areas(Yongdeng County had the lowest value).The correlation between the HSE and population density grew stronger in Anning and Chengguan Districts but became weaker in Xigu and Qilihe *** variations in the HSE were primarily caused by climate change,followed by human activities,and were also influenced by the valley ***,the spatial distribution of population density and the HSE in Lanzhou

关键词： Human settlement environment Vegetation index Nighttime light index Human comfort days

Experimental demonstration of a photonic spiking neuron based on a DFB laser subject to side-mode optical pulse injection

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Science China(Information Sciences) 2024年第3期67卷 271-280页

作者： Shuiying XIANG Shuang GAO Yuechun SHI Yuna zhang Ziwei SONG Xingxing GUO yahui zhang Yuxin MA Xiangfei CHEN State Key Laboratory of Integrated Service Networks Xidian University Yongjiang Laboratory 3. College of Engineering and Applied Sciences Nanjing University

We proposed and experimentally demonstrated a simple and novel photonic spiking neuron based on a distributed feedback(DFB) laser subject to side-mode optical pulse injection(SMOPI). The DFB laser chip is designed and fabricated based on asymmetric equivalent π phase shift(π-EPS) with the reconstruction-equivalent-chirp(REC) technique. Under side-mode continuous-wave(CW) optical injection,excitability pulse was experimentally observed during the dominant mode switching process due to the injection-locked effect. Based on the transition between the excitability regime and the side-mode injection locking effect, the controllable and repeatable neuron-like spiking response can be realized when external stimulus pulses are electro-optically modulated on the CW optical carrier. The experimental results show that the spike threshold, temporal integration, and refractory period, which are important spike processing mechanisms in biological neurons, can all be achieved in the optically-injected DFB laser. The experimental findings are also verified numerically with a rate equation model that considers the SMOPI. To the best of our knowledge, this is the first experimental demonstration of a photonic spiking neuron based on a DFB laser subject to SMOPI, which holds promise for realizing large-scale photonic spiking neuron arrays for hardware photonic spiking neural network chips.

关键词： neuromorphic photonics photonic spiking neuron DFB laser side-mode optical pulse injections

End-group modulation of phenazine based non-fullerene acceptors for efficient organic solar cells with high open-circuit voltage

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Journal of Energy Chemistry 2024年第1期88卷 461-468,I0011页

作者： yahui zhang Yafeng Li Ruixiang Peng Yi Qiu Jingyu Shi Zhenyu Chen Jinfeng Ge Cuifen zhang Zheng Tang Ziyi Ge School of Materials Science and Engineering Shanghai UniversityShanghai 200444China Zhejiang Business Technology Institute Ningbo 315012ZhejiangChina Zhejiang Provincial Engineering Research Center of Energy Optoelectronic Materials and Devices Ningbo Institute of Materials Technology and EngineeringChinese Academy of SciencesNingbo 315201ZhejiangChina Center for Advanced Low-dimension Materials College of Materials Science and EngineeringDonghua UniversityShanghai 201620China

Phenazine-based non-fullerene acceptors(NFAs)have demonstrated great potential in improving the power conversion efficiency(PCE)of organic solar cells(OSCs).Halogenation is known to be an effective strategy for increasing optical absorption,refining energy levels,and improving molecular packing in organic ***,a series of NFAs(Pz IC-4H,Pz IC-4F,Pz IC-4Cl,Pz IC-2Br)with phenazine as the central core and with/without halogen-substituted(dicyanomethylidene)-indan-1-one(IC)as the electron-accepting end group were synthesized,and the effect of end group matched phenazine central unit on the photovoltaic performance was systematically *** photophysical and morphological analyses revealed that the PM6:Pz IC-4F blend involves efficient exciton dissociation,higher charge collection and transfer rates,better crystallinity,and optimal phase ***,OSCs based on PM6:Pz IC-4F as the active layer exhibited a PCE of 16.48%with an open circuit voltage(Voc)and energy loss of 0.880 V and 0.53 e V,***,this work demonstrated a promising approach by designing phenazine-based NFAs for achieving high-performance OSCs.

关键词： Organic solar cells Non-fullerene acceptor Phenazine Central core End group

Short-term prediction for chaotic time series based on photonic reservoir computing using VCSEL with a feedback loop

在线全文

学校读者我要写书评

暂无评论

Photonics Research 2024年第6期12卷 1222-1230页

作者： XINGXING GUO HANXU ZHOU SHUIYING XIANG QIAN YU yahui zhang YANAN HAN TAO WANG YUE HAO State Key Laboratory of Integrated Service Networks Xidian UniversityXi'an 710071China State Key Discipline Laboratory of Wide Bandgap Semiconductor Technology School of MicroelectronicsXidian UniversityXi'an 710071China

Chaos,occurring in a deterministic system,has permeated various fields such as mathematics,physics,and life ***,the prediction of chaotic time series has received widespread attention and made signifi-cant ***,many problems,such as high computational complexity and difficulty in hardware im-plementation,could not be solved by existing *** overcome the problems,we employ the chaotic system of a vertical-cavity surface-emitting laser(VCSEL)mutual coupling network to generate chaotic time series through optical system simulation and experimentation in this ***,a photonic reservoir com-puting based on VCSEL,along with a feedback loop,is proposed for the short-term prediction of the chaotic time *** relationship between the prediction difficulty of the reservoir computing(RC)system and the differ-ence in complexity of the chaotic time series has been studied with ***,the attention coefficient of injection strength and feedback strength,prediction duration,and other factors on system perfor-mance are considered in both simulation and *** use of the RC system to predict the chaotic time series generated by actual chaotic systems is significant for expanding the practical application scenarios of the RC.

关键词： loop chaotic prediction

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

基于文明比较研究的中国民族学

浙江社会科学 2024年第2期 5-13,155页

作者：张亚辉厦门大学社会与人类学院厦门361005

中国民族学的学科建设要以发现基于自身的普遍知识价值为目标,在西方民族学之外提出自己对世界的理解,进而将中国从近代西方民族学与民族主义研究的知识谱系中解脱出来,从比较文明研究入手,重新思考中国“民族”概念的意涵。中国文明是... 详细信息

中国民族学的学科建设要以发现基于自身的普遍知识价值为目标,在西方民族学之外提出自己对世界的理解,进而将中国从近代西方民族学与民族主义研究的知识谱系中解脱出来,从比较文明研究入手,重新思考中国“民族”概念的意涵。中国文明是以时空循环制度为基础的,不同于以律法为基础的印欧文明和以信仰为基础的闪米特-阿拉伯文明,中国的民族也因此不同于西方基于日耳曼人的现代性为基础的nation。中国民族学的知识使命即在于以一种普遍知识方案提防走向过度的相对主义、在时空制度的现代转型过程中探寻少数民族的现代化方案、在后革命时代以国家的道德事业为基础来重构中国的整体性。

关键词：文明比较研究中国民族学时空制度民族学事实少数民族

在线全文

学校读者我要写书评

暂无评论

中国民族研究的古典格局与现代方案

西北民族研究 2024年第3期 40-54页

作者：张亚辉厦门大学社会与人类学院厦门361005

中国近代的民族研究肇始于近代欧洲民族主义扩张和重新解释中国古典文明之需求的双重背景下。从晚清开始,中国学术界一方面对欧洲民族主义的自然主义特征有所保留,另一方面对华夏—部族的古典政治结构难以割舍。中国学术界在尝试用“民... 详细信息

中国近代的民族研究肇始于近代欧洲民族主义扩张和重新解释中国古典文明之需求的双重背景下。从晚清开始,中国学术界一方面对欧洲民族主义的自然主义特征有所保留,另一方面对华夏—部族的古典政治结构难以割舍。中国学术界在尝试用“民族”概念弥合古典文明遗产和现代国家理想的过程中,先后出现过同化论、五族共和论和丛体论等较为突出的理论探索。丛体论的问题意识及其与中国民族实践的密切结合,使中华民族多元一体格局理论能够成为今天中国民族研究真正有延展性的本土化理论系统。中华民族多元一体是由丛体、古典文明的时空—法权结构和现代平等主义民族体系三个层面复合而成的。铸牢中华民族共同体意识,要关注这个三重复合结构与56个民族的关联与平衡。

关键词：中华民族多元一体格局丛体时空制度铸牢中华民族共同体意识

同方期刊数据库