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Distributions of Visual Receptive Fields from Retinotopic to Craniotopic Coordinates in the Lateral Intraparietal Area and Frontal Eye Fields of the Macaque

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Neuroscience Bulletin 2024年第2期40卷 171-181页

作者： Lin Yang Min Jin Cong zhang Ning Qian mingsha zhang Key Laboratory of Cognitive Neuroscience and Learning Division of PsychologyBeijing Normal UniversityBeijing 100875China Institute of Neuroscience Key Laboratory of Primate NeurobiologyCAS Center for Excellence in Brain Science and Intelligence TechnologyChinese Academy of SciencesShanghai 200031China Department of Neuroscience and Zuckerman Institute Columbia UniversityNew York 10027USA

Even though retinal images of objects change their locations following each eye movement,we perceive a stable and continuous *** possible mechanism by which the brain achieves such visual stability is to construct a craniotopic coordinate by integrating retinal and extraretinal *** have been several proposals on how this may be done,including eye-position modulation(gain fields)of retinotopic receptive fields(RFs)and craniotopic *** the present study,we investigated coordinate systems used by RFs in the lateral intraparietal(LIP)cortex and frontal eye fields(FEF)and compared the two *** mapped the two-dimensional RFs of neurons in detail under two eye fixations and analyzed how the RF of a given neuron changes with eye position to determine its coordinate *** same recording and analysis procedures were applied to the two brain *** found that,in both areas,RFs were distributed from retinotopic to craniotopic *** was no significant difference between the distributions in the LIP and *** a small fraction of neurons was fully craniotopic,whereas most neurons were between the retinotopic and craniotopic *** distributions were strongly biased toward the retinotopic side but with significant craniotopic *** results suggest that there is only weak evidence for craniotopic RFs in the LIP and FEF,and that transformation from retinotopic to craniotopic coordinates in these areas must rely on other factors such as gain fields.

关键词： Reference frames Eye-centered Headcentered Visual stability

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Perisaccadic visual receptive field remapping and visual stability

Perisaccadic visual receptive field remapping and visual sta...

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第十一届全国钙信号和细胞功能研讨会

作者： Cong zhang Lin Yang mingsha zhang State Key Laboratory of Cognitive Neuroscience and Learning IDG/Mc Govern Institute for Brain Research Beijing Normal University

Humans and monkeys have access to an accurate representation of visual space despite a constantly moving eye. One mechanism by which the brain accomplishes this is by remapping visual receptive fields around the time of a saccade. In this process a neuron can be excited by a probe stimulus in the current receptive field, and also simultaneously by a probe stimulus in the location that will be brought into the neuron’s receptive field by the saccade（the future receptive field）, even before saccade begins. Here we show that perisaccadic neuronal excitability is not limited to the current and future receptive fields, but encompasses the entire region of visual space across which the current receptive field will be swept by the saccade. A computational model shows that this receptive field expansion is consistent with the propagation of a wave of activity across the cerebral cortex as saccade planning and remapping proceed.

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Correction:Distributions of Visual Receptive Fields from Retinotopic to Craniotopic Coordinates in the Lateral Intraparietal Area and Frontal Eye Fields of the Macaque

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Neuroscience Bulletin 2024年第6期40卷 855-855页

作者： Lin Yang Min Jin Cong Zhan Ning Qian mingsha zhang Key Laboratory of Cognitive Neuroscience and Learning Division of PsychologyBeijing Normal UniversityBeijing100875China Institute of Neuroscience Key Laboratory of Primate NeurobiologyCAS Center for Excellence in Brain Science and Intelligence TechnologyChinese Academy of SciencesShanghai200031China Department of Neuroscience and Zuckerman Institute Columbia UniversityNew York10027USA

In the Original Publication,the article title was incorrectly given as'Distributions of Visual Receptive Fields from Retinotopic to Craniotopic Coordinates in the lateral intraparietal and frontal eye field of the Macaque'but should have been'Distributions of Visual Receptive Fields from Retinotopic to Craniotopic Coordinates in the Lateral Intraparietal Area and Frontal Eye Fields of the Macaque'.

关键词： Visual Area topic

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基于空间矩阵模型及0~1测度的美国白蛾风险格局分析

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林业科学 2021年第1期57卷 140-152页

作者：叶江霞王敬文张明莎周汝良石雷中国林业科学研究院资源昆虫研究所昆明650224 西南林业大学昆明650233

【目的】分析美国白蛾在中国的扩散风险格局,为其防治和风险管理提供精准的空间位置和技术支持。【方法】收集全国2011年至2016年美国白蛾的乡镇检疫数据,进行寄主、气象要素、地理环境、人为影响变量的空间模拟。将影响有害生物发生发... 详细信息

【目的】分析美国白蛾在中国的扩散风险格局,为其防治和风险管理提供精准的空间位置和技术支持。【方法】收集全国2011年至2016年美国白蛾的乡镇检疫数据,进行寄主、气象要素、地理环境、人为影响变量的空间模拟。将影响有害生物发生发展的因子及风险描述为空间栅格点上的连续变量,利用GIS(地理信息系统)的空间矩阵模型表达变量,并借助SPSS筛选和建立0~1测度的多变量Logistic概率模型,以250 m为最小空间栅格,描述全国任意一个空间地理单元发生扩散的风险概率。【结果】除生物气候变量外,人流物流变量的影响显著,高风险位于东部农区、建设用地及人工植被区域,主要集中在辽宁、北京、天津、上海、河北、山东、河南、安徽、湖北、江苏、陕西等省市,并有扩散到吉林、内蒙、湖南、江西、新疆、宁夏等省区的趋势。【结论】利用矩阵模型及0~1概率化测度描述有害生物发生及扩散风险,对基层开展检疫和防治具明显的指导作用。引入人流物流扩散影响模拟变量,可有效提高测报预警精度。人为活动密集区既是疫区,又是传播通道。山地森林系统的自然植被对传播扩散具有阻隔作用,加强高风险区的近自然林修复和建设,加大重要通道的检疫,对防控具有重要意义。

关键词：空间矩阵风险分析美国白蛾人流物流概率化测报

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林分尺度上的森林火险动态评估

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林业资源管理 2020年第2期 126-134页

作者：吴明山周汝良张明莎叶江霞西南林业大学理学院西南林业大学林学院西南林业大学生态旅游与地理学院

以林分为空间单元,动态评估小班尺度潜在森林火灾风险对于火灾预防管理实践具有重要作用。研究以云南临沧市临翔区多年采脂思茅松林分为对象,采集多年未采脂、采脂条件下的林分因子样本,以火源可及性、死可燃物载量、林分易燃性,以及坡... 详细信息

以林分为空间单元,动态评估小班尺度潜在森林火灾风险对于火灾预防管理实践具有重要作用。研究以云南临沧市临翔区多年采脂思茅松林分为对象,采集多年未采脂、采脂条件下的林分因子样本,以火源可及性、死可燃物载量、林分易燃性,以及坡度、坡向、地表湿润度为评估变量,构建小班尺度上的森林火险评估模型,分别评估林分在全国火险等级模型下的基础火险值(BHX)、未采脂条件下的静态火险值(SHX)及采脂条件下动态火险值(DHX)。在地理信息系统(GIS)支持下,利用地图模拟表达采脂活动引起林分可燃物载量和易燃性、火源密度等增加下的火险动态变化格局,并分析林分森林火险等级大幅变化原因。研究结果表明:研究区所有林分具有一致的基础森林火险值(BHX),危险性大;林分可燃物条件差异造成的未采脂林分静态火险值差异较大,大部分小班处于高火险等级;林分因采脂经营活动使各小班火险值呈现不同程度的增加,林分火险等级主要集中在极高火险,火险上升比率大于25%的林分面积超过60%;过度、非规范的采脂经营活动是林分火险等级增加的主要原因。林分是森林经营活动的基本单位,火险评估精细化至不同经营水平下的林分小班尺度,研究对基层林火管理及其它经营措施下火险动态评估具有一定的参考及借鉴价值。

关键词：林分火险等级动态评估 GIS 采脂活动

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应用Landsat-8数据分析山地地表温度格局及影响要素

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东北林业大学学报 2021年第5期49卷 97-104页

作者：王敬文赵微叶江霞朱洪琴张明莎西南林业大学昆明650224 昆明理工大学

地表温度是研究陆地表面与大气之间相互作用的重要参数,分析山地地表温度格局及作用机理,对了解山地生态系统的时空分布特征,准确刻画山地地表水热环境具有重要意义。以云南滇中地区为研究区,应用Landsat-8数据、多窗口区域匹配算法(IM... 详细信息

地表温度是研究陆地表面与大气之间相互作用的重要参数,分析山地地表温度格局及作用机理,对了解山地生态系统的时空分布特征,准确刻画山地地表水热环境具有重要意义。以云南滇中地区为研究区,应用Landsat-8数据、多窗口区域匹配算法(IMW),结合近地表常规气象站及微气象台站同步观测数据进行地表温度反演,分析地表温度空间格局及其与地理环境和人居环境因子的定量关系,构建了山地地表温度多因子作用模型。结果表明:遥感影像与地面同步观测数据相结合反演的地表温度场平均绝对误差为2.01℃、平均相对误差为2.35%、均方根误差为5.09℃,反演结果优于MODIS地表温度产品。地表的温度场空间格局与地理环境及人居环境密切相关,归一化植被指数、地形起伏度、海拔、坡度、水域影响与地表温度场成负相关,而居民区与地表温度成正相关关系;从相关性大小看,山地温度受归一化植被指数影响最大,其次是地形起伏度、海拔、坡度、水体、居民区,坡向影响最小,说明提高植被覆盖具有地表降温的重要作用,城市人居环境具有地表增温效应。因此,构建山地温度时空模拟模型,应充分考虑地理环境微格局与人居环境影响。

关键词： landsat-8 地表温度地形起伏度人居环境相关性

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Numerical Simulation of Radiation Transport to Improve Microalgae Cultivation in an Air-Lift Photobioreactor

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Journal of Thermal Science 2025年第1期34卷 62-76页

作者： zhang Xianbin LI Mingjia HUNG Tzuchen zhang Zixun Key Laboratory of Thermo-Fluid Science and Engineering of Ministry of Education School of Energy and Power EngineeringXi'an Jiaotong University School of Mechanical Engineering Beijing Institute of Technology Department of Mechanical Engineering Taipei University of Technology

A comprehensive numerical model is developed to simulate the growth of microalgae under light/dark cycling *** purpose of this study is to predict the growth rate of Chlorella vulgaris cultivated in photobioreactors(PBRs) in order to improve the light conditions for microalgae and enhance the photosynthetic *** fluid dynamics(CFD) is used to simulate its internal hydrodynamic *** Lagrangian method is employed to track the movement of microalgae *** radiative transfer equation(RTE)is used to obtain light intensity *** combination of light radiation field and microalgae cell motions is used to construct the light history and they are integrated into the model of the photosynthetic units(PSU) to calculate the microalgae growth *** numerical results demonstrate that enhanced light/dark cycling frequency with ordered mixing can promote efficient microalgae *** effect of the vortex flow field generated by the baffles in an air-lift PBR is analyzed for increasing microalgae growth *** using the 1:1 baffle spacing,the biomass production of microalgae is increased by 41.8% compared to the original PBR.

关键词： light distribution particle tracking photobioreactor structure optimization

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Melting Evaluation of Phase Change Materials Impregnated into Cascaded Metal Foams with Regionalized Enhancement

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Journal of Thermal Science 2025年第1期34卷 223-241页

作者： WEI Xinyi zhang Nan zhang Zhaoli CAO Xiaoling YUAN Yanping School of Mechanical Engineering Southwest Jiaotong University

Metal foam promotes the heat transfer of phase change materials(PCMs) in the penalty of reducing the energy storage density of the composite *** this work,the effects of constant porosity(0.96,0.94,0.92,or 0.90) and pore density(PPI) of metal foam on heat transfer of composite PCMs are *** rate could be enhanced by employing with low porosity copper ***,aiming to the right bottom phase changing "dead region",a regionalized enhancement strategy of cascaded metal foams is *** dynamic melting performances of all the composite PCMs are comprehensively *** results reveal that the cascaded configuration is beneficial for *** show that the horizontal strategy enhances melting performance:a maximum of 17.98% reduction in total melting time could be reached when the rear part porosity is 90%.The energy storage density rate could be raised by 5.48%.Besides,the vertical strategy performs with a better average temperature uniformity of 0.441 and brings a lower temperature in the heated *** sum up,the regionalized enhancement of copper foam provides better performance in the phase change *** shows significant potential for solar heat storage and thermal protection.

关键词： copper metal foam heat transfer enhancement phase change materials regionalized enhancement

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The optimal control theory——a scientific approach to fundamentally solving control problems

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Science China(Information Sciences) 2025年第1期68卷 389-391页

作者： Huanshui zhang School of Electrical and Automation Engineering Shandong University of Science and Technology School of Control Science and Engineering Shandong University

The maximum principle has bridged mathematical optimization to optimal control,ushering in significant developments and refinements in optimal control theory,notably during the 1960s with the advent of linear quadratic (LQ)control and linear quadratic estimation (LQE).This progression propelled optimal control theory into further advancements,encompassing stochastic control,robust/H-infinity control,model predictive control (MPC),networked control,and reinforcement learning *** control,established upon a rigorous mathematical foundation,extends static optimization theory to dynamic systems,exhibiting scientific essence,unity,and ***,since its inception,optimal control theory has served as an indispensable core role across all control-related domains,including communication-constrained control in networked systems,consensus control,cooperative control,and reinforcement learning control.

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Method for Estimating the State of Health of Lithium-ion Batteries Based on Differential Thermal Voltammetry and Sparrow Search Algorithm-Elman Neural Network

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Energy Engineering 2025年第1期122卷 203-220页

作者： Yu zhang Daoyu zhang TiezhouWu School of Electrical and Electronic Engineering Hubei University of TechnologyWuhan430068China

Precisely estimating the state of health(SOH)of lithium-ion batteries is essential for battery management systems(BMS),as it plays a key role in ensuring the safe and reliable operation of battery ***,current SOH estimation methods often overlook the valuable temperature information that can effectively characterize battery aging during capacity ***,the Elman neural network,which is commonly employed for SOH estimation,exhibits several drawbacks,including slow training speed,a tendency to become trapped in local minima,and the initialization of weights and thresholds using pseudo-random numbers,leading to unstable model *** address these issues,this study addresses the challenge of precise and effective SOH detection by proposing a method for estimating the SOH of lithium-ion batteries based on differential thermal voltammetry(DTV)and an SSA-Elman neural ***,two health features(HFs)considering temperature factors and battery voltage are extracted fromthe differential thermal voltammetry curves and incremental capacity ***,the Sparrow Search Algorithm(SSA)is employed to optimize the initial weights and thresholds of the Elman neural network,forming the SSA-Elman neural network *** validate the performance,various neural networks,including the proposed SSA-Elman network,are tested using the Oxford battery aging *** experimental results demonstrate that the method developed in this study achieves superior accuracy and robustness,with a mean absolute error(MAE)of less than 0.9%and a rootmean square error(RMSE)below 1.4%.

关键词： Lithium-ion battery state of health differential thermal voltammetry Sparrow Search Algorithm

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