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Evaluation of SWAT Model performance on glaciated and non-glaciated subbasins of Nam Co Lake, Southern Tibetan Plateau, China

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Journal of Mountain Science 2019年第5期16卷 1075-1097页

作者： Muhammad ADNAN KANG Shi-chang zhang guo-shuai Muhammad Naveed ANJUM Muhammad ZAMAN zhang Yu-qing State Key Laboratory of Cryospheric Science Northwest Institute of Eco-Environment and Resources Chinese Academy of Sciences China University of Chinese Academy of Sciences CAS Centre for Excellence in Tibetan Plateau Earth Sciences Key Laboratory of Tibetan Environment Changes and Land Surface Processes Institute of Tibetan Plateau Research Chinese Academy of Sciences Division of Hydrology Water-Land Resources in Cold and Arid Regions Northwest Institute of Eco-Environment and Resources Chinese Academy of Sciences Department of Irrigation & Drainage University of AgricultureFaisalabad Research Center of Fluid Machinery Engineering & Technology Jiangsu University School of Urban and Environmental Sciences Huaiyin Normal University

This paper presents an assessment of the Soil and Water Assessment Tool(SWAT) on a glaciated(Qugaqie) and a non-glaciated(Niyaqu) subbasin of the Nam Co Lake. The Nam Co Lake is located in the southern Tibetan Plateau, two subbasins having catchment areas of 59 km^2 and 388 km^2, respectively. The scores of examined evaluation indices(i.e., R^2, NSE, and PBIAS) established that the performance of the SWAT model was better on the monthly scale compared to the daily scale. The respective monthly values of R^2, NSE, and PBIAS were 0.94, 0.97, and 0.50 for the calibration period while 0.92, 0.88, and -8.80 for the validation period. Glacier melt contribution in the study domain was simulated by using the SWAT model in conjunction with the Degree Day Melt(DDM) approach. The conjunction of DDM with the SWAT Model ensued improved results during both calibration(R^2=0.96, NSE=0.95, and PBIAS=-13.49) and validation (R^2=0.97, NSE=0.96, and PBIAS=-2.87) periods on the monthly time scale. Average contribution(in percentage) of water balance components to the total streamflow of Niyaqu and Qugaqie subbasins was evaluated. We found that the major portion(99.45%) of the streamflow in the Niyaqu subbasin was generated by snowmelt or rainfall surface runoff(SURF_Q), followed by groundwater(GW_Q, 0.47%), and lateral(LAT_Q, 0.06%) flows. Conversely, in the Qugaqie subbasin, major contributor to the streamflow(79.63%) was glacier melt(GLC_Q), followed by SURF_Q(20.14%), GW_Q(0.13%), and LAT_Q(0.089%). The contribution of GLC_Q was the highest(86.79%) in July and lowest(69.95%) in September. This study concludes that the performance of the SWAT model in glaciated catchment is weak without considering glacier component in modeling; however, it performs reasonably well in non-glaciated catchment. Furthermore, the temperature index approach with elevation bands is viable in those catchments where streamflows are driven by snowmelt. Therefore, it is recommended to use the SWAT Model in con

关键词： SWAT Model Nam Co Lake Degree-day melt model Streamflow Hydrological Response Unit

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量子隐形传态的通用线路

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软件学报 2019年第12期30卷 3579-3589页

作者：张国帅许道云贵州大学数学与统计学院贵州贵阳550025 贵州大学计算机科学与技术学院贵州贵阳550025

EPR态作为最基本的量子纠缠态,在量子隐形传态中起着重要作用.研究适应任意类型EPR通道的单量子比特隐形传送通用线路,并推广到任意W比特量子隐形传送通用线路.首先设计出4种EPR态,分别作为量子通道的单比特量子隐形传态,通过分析EPR量... 详细信息

EPR态作为最基本的量子纠缠态,在量子隐形传态中起着重要作用.研究适应任意类型EPR通道的单量子比特隐形传送通用线路,并推广到任意W比特量子隐形传送通用线路.首先设计出4种EPR态,分别作为量子通道的单比特量子隐形传态,通过分析EPR量子通道与量子操作门之间的关系,设计一种单比特通用线路;然后,设计两比特的标准量子隐形传态线路,并用Mathematica进行仿真验证线路的正确性,再把它推广到W比特量子隐形传送线路;最后,将单量子比特通用线路与W比特量子隐形传送线路进行融合,最终设计出任意N比特量子隐形传送通用线路.W粒子量子比特通用线路通过信息接受者进行带参数的幺正变换,其中,参数由制备出的EPR对类型确定,解决了因EPR制备中心出错导致的信息传送失败问题.

关键词：量子隐形传态通用线路 EPR态纠缠态量子通道中图法分类号:TP301

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带有引诱角色的有限时间协同制导方法

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宇航学报 2018年第3期29卷 308-317页

作者：张帅郭杨王仕成火箭军工程大学精确制导与仿真实验室西安710025

为实现高价值飞行器的有效突防,采用突防飞行器携带一枚防御器的协同突防方案,在突防器作为引诱角色的情况下,基于有限时间控制理论提出了一种带有拦截角约束的协同制导方法。基于飞行器相对运动学方程和一阶动力学特性,建立了带有拦截... 详细信息

为实现高价值飞行器的有效突防,采用突防飞行器携带一枚防御器的协同突防方案,在突防器作为引诱角色的情况下,基于有限时间控制理论提出了一种带有拦截角约束的协同制导方法。基于飞行器相对运动学方程和一阶动力学特性,建立了带有拦截角约束的协同反拦截模型;用度量矩阵刻画系统有限时间输入输出动态品质,基于微分线性矩阵不等式给出了有限时间状态反馈控制器设计方法。数学仿真表明,该方法能够确保防御器在有限时间内以预置的拦截角有效拦截对方拦截器;在突防器进行引诱配合的情况下,协同突防方案能够大幅节省防御器需用加速度,验证了协同制导方法的有效性;同时,所提制导方法在不同拦截角度和初始发射条件下都能达到较好的控制效果,表现出较强的鲁棒性。

关键词：协同制导引诱角色有限时间输入输出稳定拦截角

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Flexible Graphene Field‑Effect Transistors and Their Application in Flexible Biomedical Sensing

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Nano-Micro Letters 2025年第2期17卷 252-313页

作者： Mingyuan Sun shuai Wang Yanbo Liang Chao Wang Yunhong zhang Hong Liu Yu zhang Lin Han Institute of Marine Science and Technology Shandong UniversityQingdao 266237ShandongPeople’s Republic of China State Key Laboratory of Crystal Materials Shandong UniversityJinan 250100ShandongPeople’s Republic of China School of Integrated Circuits Shandong UniversityJinan 250100ShandongPeople’s Republic of China Shandong Engineering Research Center of Biomarker and Artificial Intelligence Application Jinan250100ShandongPeople’s Republic of China

Flexible electronics are transforming our lives by making daily activities more *** to this innovation are field-effect transistors(FETs),valued for their efficient signal processing,nanoscale fabrication,low-power consumption,fast response times,and ***,known for its exceptional mechanical properties,high electron mobility,and biocompatibility,is an ideal material for FET channels and *** combination of graphene and FETs has given rise to flexible graphene field-effect transistors(FGFETs),driving significant advances in flexible electronics and sparked a strong interest in flexible biomedical ***,we first provide a brief overview of the basic structure,operating mechanism,and evaluation parameters of FGFETs,and delve into their material selection and patterning *** ability of FGFETs to sense strains and biomolecular charges opens up diverse application *** specifically analyze the latest strategies for integrating FGFETs into wearable and implantable flexible biomedical sensors,focusing on the key aspects of constructing high-quality flexible biomedical ***,we discuss the current challenges and prospects of FGFETs and their applications in biomedical *** review will provide valuable insights and inspiration for ongoing research to improve the quality of FGFETs and broaden their application prospects in flexible biomedical sensing.

关键词： Flexible Graphene Field-effect transistor Wearable Implantable Biosensor

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基于深度学习的多目标跟踪关联模型设计

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自动化学报 2020年第12期46卷 2690-2700页

作者：侯建华张国帅项俊中南民族大学电子信息工程学院武汉430074

近年来,深度学习在计算机视觉领域的应用取得了突破性进展,但基于深度学习的视频多目标跟踪(Multiple object tracking, MOT)研究却相对甚少,而鲁棒的关联模型设计是基于检测的多目标跟踪方法的核心.本文提出一种基于深度神经网络和度... 详细信息

近年来,深度学习在计算机视觉领域的应用取得了突破性进展,但基于深度学习的视频多目标跟踪(Multiple object tracking, MOT)研究却相对甚少,而鲁棒的关联模型设计是基于检测的多目标跟踪方法的核心.本文提出一种基于深度神经网络和度量学习的关联模型:采用行人再识别(Person re-identification, Re-ID)领域中广泛使用的度量学习技术和卷积神经网络(Convolutional neural networks, CNNs)设计目标外观模型,即利用三元组损失函数设计一个三通道卷积神经网络,提取更具判别性的外观特征构建目标外观相似度;再结合运动模型计算轨迹片间的关联概率.在关联策略上,采用匈牙利算法,首先以逐帧关联方式得到短小可靠的轨迹片集合,再通过自适应时间滑动窗机制多级关联,输出各目标最终轨迹.在2DMOT2015、MOT16公开数据集上的实验结果证明了所提方法的有效性,与当前一些主流算法相比较,本文方法取得了相当或者领先的跟踪效果.

关键词：多目标跟踪深度学习度量学习关联模型多级关联

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Universal design of three-dimensional porous graphene-iron based promotors for kinetically rationalized lithium-sulfur chemistry

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Journal of Energy Chemistry 2025年第1期100卷 192-200页

作者： Hua Gao Yunfeng zhang Menglei Wang Ruoxuan Yang shuai Feng Xuan Cao Yaping zhang Zhongyuan Lu Yingze Song State Key Laboratory of Environment-Friendly Energy Materials School of Materials and Chemistry Southwest University of Science and Technology School of Material Science and Engineering Henan University of Technology College of Chemistry and Chemical Engineering Taishan University

Lithium-sulfur （Li-S） batteries are widely deemed to be one of the most potential candidates for future secondary batteries because of their remarkable energy ***,notorious polysulfide shuttling and retarded sulfur reaction kinetics pose significant obstacles to the further application of Li-S *** rationally designed highly active electrocatalysts can facilitate polysulfide conversion,the universal and scalable synthesis strategies need to be ***,a universal synthetic strategy to construct a series of three-dimensional （3D） porous graphene-iron （3DGr-Fe） based electrocatalysts involving 3DGr-FeP,3DGr-Fe3C,and 3DGr-Fe3Se4is exploited for manipulating the Li-S redox *** has been observed that the implementation of a 3D porous Gr architecture leads to the well-designed conductive networks,while the uniformly dispersed iron nanoparticles introduce an abundance of active sites,fostering the lithium polysulfide conversion,thereby bolstering the overall electrochemical *** Li-S battery with the 3DGr-Fe based electrocatalyst exhibits remarkable capacity retention of 94.8%upon 100 times at 0.2 ***,the soft-packaged Li-S pouch cell based on such a 3DGr-Fe electrocatalyst delivers superior capacity of 1060.71 mA h g-1and guarantees for the continuous 30 min work of fan *** investigation gives comprehensive insights into the design,synthesis,and mechanism of 3DGr-Fe based electrocatalysts with high activity toward efficient and durable Li-S batteries.

关键词： Redox reactions

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Recent Advances in Artificial Sensory Neurons:Biological Fundamentals,Devices,Applications,and Challenges

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Nano-Micro Letters 2025年第3期17卷 168-216页

作者： shuai Zhong Lirou Su Mingkun Xu Desmond Loke Bin Yu Yishu zhang Rong Zhao Guangdong Institute of Intelligence Science and Technology HengqinZhuhai 519031People’s Republic of China College of Integrated Circuits Zhejiang UniversityHangzhou 3112000People’s Republic of China ZJU-Hangzhou Global Scientific and Technological Innovation Center Hangzhou 310027People’s Republic of China Department of Science Mathematics and TechnologySingapore University of Technology and DesignSingapore 487372Singapore Department of Precision Instruments Tsinghua UniversityBeijing 100084People’s Republic of China Center for Brain‑Inspired Computing Research Tsinghua UniversityBeijing 100084People’s Republic of China IDG/McGovern Institute for Brain Research Tsinghua UniversityBeijing 100084People’s Republic of China

Spike-based neural networks,which use spikes or action potentialsto represent information,have gained a lot of attention because of their high energyefficiency and low power *** fully leverage its advantages,convertingthe external analog signals to spikes is an essential *** including analog-to-digital converters or ring oscillators,and sensorssuffer from high power and area *** efforts are devoted to constructingartificial sensory neurons based on emerging devices inspired by the biologicalsensory *** can simultaneously perform sensing and spike conversion,overcoming the deficiencies of traditional sensory *** review summarizesand benchmarks the recent progress of artificial sensory *** starts with thepresentation of various mechanisms of biological signal transduction,followed bythe systematic introduction of the emerging devices employed for artificial ***,the implementations with different perceptual capabilitiesare briefly outlined and the key metrics and potential applications are also ***,we highlight the challenges and perspectives for the future development of artificial sensory neurons.

关键词： Artificial intelligence Emerging devices Artificial sensory neurons Spiking neural networks Neuromorphic sensing

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High-energy-density lithium manganese iron phosphate for lithium-ion batteries: Progresses, challenges, and prospects

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Journal of Energy Chemistry 2025年第1期100卷 1-17页

作者： Bokun zhang Xiaoyun Wang shuai Wang Yan Li Libo Chen Handong Jiao Zhijing Yu Jiguo Tu State Key Laboratory of Advanced Metallurgy University of Science and Technology Beijing Research Institute for Intelligent Wearable Systems The Hong Kong Polytechnic University Institute of Advanced Structure Technology Beijing Institute of Technology

The soaring demand for smart portable electronics and electric vehicles is propelling the advancements in high-energy–density lithium-ion *** manganese iron phosphate (LiMnxFe1-xPO4) has garnered significant attention as a promising positive electrode material for lithium-ion batteries due to its advantages of low cost,high safety,long cycle life,high voltage,good high-temperature performance,and high energy *** LiMnxFe1-xPO4has made significant breakthroughs in the past few decades,there are still facing great challenges in poor electronic conductivity and Li-ion diffusion,manganese dissolution affecting battery cycling performance,as well as low tap *** review systematically summarizes the reaction mechanisms,various synthesis methods,and electrochemical properties of LiMnxFe1-xPO4to analyze reaction processes accurately and guide material ***,the main challenges currently faced are concluded,and the corresponding various modification strategies are discussed to enhance the reaction kinetics and electrochemical performance of LiMnxFe1-xPO4,including multi-scale particle regulation,heteroatom doping,surface coating,as well as microscopic morphology ***,in view of the current research challenges faced by intrinsic reaction processes,kinetics,and energy storage applications,the promising research directions are *** importantly,it is expected to provide key insights into the development of high-performance and stable LiMnxFe1-xPO4materials,to achieve practical energy storage requirements.

关键词： Semiconductor doping

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沙尘天气过程对呼和浩特市空气质量的影响

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环境科学与技术 2017年第6期40卷 165-170页

作者：张宝林张璟霞郭帅内蒙古师范大学化学与环境科学学院内蒙古呼和浩特010020

利用MODIS(the Moderate Resolution Imaging Spectroradiometer)影像对2015-04-15影响呼和浩特市的一次沙尘天气进行了系统判读,并分析了沙尘天气过程中气象要素变化及其对空气质量的影响,以期为沙尘天气环境影响评价提供理论依据。遥... 详细信息

利用MODIS(the Moderate Resolution Imaging Spectroradiometer)影像对2015-04-15影响呼和浩特市的一次沙尘天气进行了系统判读,并分析了沙尘天气过程中气象要素变化及其对空气质量的影响,以期为沙尘天气环境影响评价提供理论依据。遥感影像显示该次沙尘天气主要起源于内蒙古中西部,利用MODIS彩色合成影像可以识别沙尘信息,实现沙尘天气过程的监测,并判明沙尘源和影响范围等。沙尘天气过程气象要素变化分析表明该次沙尘天气由冷空气过境引发,低温大风天气有利于沙尘天气的发生。沙尘天气引起空气质量急剧下降,出现严重污染,沙尘高空远距离输送是导致呼和浩特市空气质量显著下降的重要原因。大气污染主要由颗粒物(PM_(10))的增加引起,但大风使CO、NO_2、SO_2等污染物浓度大幅度下降,具有清除人为源所排放污染物作用。

关键词： MODIS 沙尘空气质量呼和浩特

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直流电阻分压器的非线性机理研究

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计量学报 2022年第4期43卷 521-525页

作者：王楚张利莉张国帅北京卫星制造厂北京100094 北京市空间电源变换与控制工程技术研究中心北京100094

针对电阻分压器在直流低电压分压时出现的非线性现象,采用独立影响因素的分析方法,对直流电阻分压器的非线性机理进行了研究。通过分析和实验验证,确定了造成非线性的原因是工作电流的变化导致电阻分压器输出热电势的变化。据此,建立了... 详细信息

针对电阻分压器在直流低电压分压时出现的非线性现象,采用独立影响因素的分析方法,对直流电阻分压器的非线性机理进行了研究。通过分析和实验验证,确定了造成非线性的原因是工作电流的变化导致电阻分压器输出热电势的变化。据此,建立了非线性数学模型,提出了非线性修正方法。利用该方法,±200μV直流电压输出非线性误差小于5 nV。

关键词：计量学直流低电压电阻分压器非线性误差热电势

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