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Inspires effective alternatives to backpropagation:predictive coding helps understand and build learning

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Neural Regeneration Research 2025年第11期20卷 3215-3216页

作者： Zhenghua Xu Miao Yu yuhang Song School of Health Sciences and Biomedical Engineering Hebei University of TechnologyTianjinChina Department of Computer Science University of OxfordOxfordUK

Artificial neural networks are capable of machine learning by simulating the hiera rchical structure of the human *** enable learning by brain and machine,it is essential to accurately identify and correct the prediction errors,referred to as credit assignment(Lillicrap et al.,2020).It is critical to develop artificial intelligence by understanding how the brain deals with credit assignment in neuroscience.

关键词： assignment learning enable

几种附电离层约束GNSS单频PPP性能评估

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全球定位系统 2021年第4期46卷 59-65页

作者：李众葛海波卜宇航同济大学测绘与地理信息学院上海200092

针对单频精密单点定位(PPP)两种常用的定位模型:非组合模型和附加电离层约束模型,同时综合考虑电离层约束模型三种不同约束策略(常数约束,时空约束,逐步松弛),对比分析了其使用GPS单系统及GPS+BDS双系统观测值的定位收敛时间,定位精度... 详细信息

针对单频精密单点定位(PPP)两种常用的定位模型:非组合模型和附加电离层约束模型,同时综合考虑电离层约束模型三种不同约束策略(常数约束,时空约束,逐步松弛),对比分析了其使用GPS单系统及GPS+BDS双系统观测值的定位收敛时间,定位精度及其优缺点.实验结果表明:使用GPS单系统,附加不同电离层约束对单频PPP收敛时间缩短效果显著,其中逐步松弛约束平均收敛时间最短,其平均收敛时间为32.36 min,四种定位模型收敛后的定位精度基本相当.加入北斗卫星导航系统(BDS)后,四种定位模型的收敛时间均有不同程度的缩短,其中时空约束模型缩短最为显著,收敛时间缩短为单系统的59.22%.在定位精度方面,加入BDS观测值后水平方向定位精度可提升0.5~1.3 cm,垂直方向定位精度略有下降.

关键词：单频精密单点定位(PPP) 定位模型收敛时间定位精度多系统

Recent Advances in Fibrous Materials for Hydroelectricity Generation

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Nano-Micro Letters 2025年第2期17卷 109-133页

作者： Can Ge Duo Xu Xiao Feng Xing Yang Zheheng Song yuhang Song Jingyu Chen Yingcun Liu Chong Gao Yong Du Zhe Sun Weilin Xu Jian Fang College of Textile and Clothing Engineering Soochow UniversitySuzhou 215123People’s Republic of China National Engineering Laboratory for Modern Silk Soochow UniversitySuzhou 215123People’s Republic of China State Key Laboratory of New Textile Materials and Advanced Processing Technologies Wuhan Textile UniversityWuhan 430200People’s Republic of China Institute of Functional Nano&Soft Materials(FUNSOM) Soochow UniversitySuzhou 215123People’s Republic of China Department of Electrical and Computer Engineering University of MassachusettsAmherstMA 01003USA Department of Materials Imperial College LondonSouth Kensington CampusLondon SW72AZUK College of Textile Science and Engineering Zhejiang Sci-Tech UniversityHangzhou 310018People’s Republic of China School of Materials Science and Engineering Shanghai Institute of Technology100 Haiquan RoadShanghai 201418People’s Republic of China

Depleting fossil energy sources and conventional polluting power generation pose a threat to sustainable *** generation from ubiquitous and spontaneous phase transitions between liquid and gaseous water has been considered a promising strategy for mitigating the energy *** materials with unique flexibility,processability,multifunctionality,and practicability have been widely applied for fibrous materials-based hydroelectricity generation(FHG).In this review,the power generation mechanisms,design principles,and electricity enhancement factors of FHG are first ***,the fabrication strategies and characteristics of varied constructions including 1D fiber,1D yarn,2D fabric,2D membrane,3D fibrous framework,and 3D fibrous gel are ***,the advanced functions of FHG during water harvesting,proton dissociation,ion separation,and charge accumulation processes are analyzed in ***,the potential applications including power supply,energy storage,electrical sensor,and information expression are also ***,some existing challenges are considered and prospects for future development are sincerely proposed.

关键词： Hydroelectricity Fibrous material Streaming potential Ion diffusion

InNi alloy-induced interface effect promoting the parallel electron transfer: improved photothermal catalytic CO2 hydrogenation

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Science China Chemistry 2025年

作者： Haoyu Zhang yuhang Li Yu Nie Xinyu Dou Haodong Ji Xin Tan Jinhua Ye Tao Yu School of Chemical Engineering and Technology Tianjin University Eco-environment and Resource Efficiency Research Laboratory School of Environment and Energy Peking University Shenzhen Graduate School School of Environmental Science and Engineering Tianjin University Advanced Catalytic Materials Research Center School of Materials Science and Engineering Tianjin University Research Center for Solar Driven Carbon Neutrality Hebei University

Photothermal catalytic CO2hydrogenation is an effective means of utilizing carbon ***,it is severely limited in terms of kinetics and ***,it is necessary to meticulously design catalysts to solve this ***,a sandwich structured NiO@InNi/In2O3is designed to intrinsically regulate the direction of photogenerated carriers transfer,resulting in a CO yield of 42.97 mmol g-1h-1(1290.3μmol h-1) with a selectivity near to 100%.InNi alloy favors the collection of photogenerated carriers by the parallel way and enhancement of the adsorption and activation of *** grown on the surface of InNi alloy not only improves the adsorption of H2and provides sufficient H+for the reaction,but also makes InNi alloy more stable during the reaction *** photothermal effect caused by In2O3accelerates the transfer of photogenerated carriers and increases the surface temperature of the catalyst,thereby synergistically promoting the reaction from a kinetic *** work ameliorates the kinetic and thermodynamic limitations of the photothermal catalytic CO2hydrogenation process through rationally designing the electron transfer direction of the sandwich structured catalysts to parallel way.

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基于虚拟矢量的五相永磁同步电动机直接转矩容错控制

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上海电机学院学报 2021年第6期24卷 347-353页

作者：秦翌菲王爱元卜玉杭上海电机学院电气学院上海201306

针对五相永磁同步电动机在缺相故障状态下转矩脉动过大的问题,提出一种基于虚拟电压矢量的直接转矩容错控制算法。建立缺相状态下的数学模型,分析缺相状态下的电压矢量分布;考虑到对x-y子空间谐波分量的抑制和优化故障造成的转矩脉动,... 详细信息

针对五相永磁同步电动机在缺相故障状态下转矩脉动过大的问题,提出一种基于虚拟电压矢量的直接转矩容错控制算法。建立缺相状态下的数学模型,分析缺相状态下的电压矢量分布;考虑到对x-y子空间谐波分量的抑制和优化故障造成的转矩脉动,根据矢量分布特点构建虚拟电压矢量;以构建的虚拟电压矢量为基础,建立直接转矩控制容错开关表进行容错控制。通过Matlab/Simulink仿真验证,该方法能对缺相后转矩脉动起到优化作用,使五相永磁同步电动机可在缺相状态下稳定运行。

关键词：五相永磁同步电动机缺相故障直接转矩容错控制虚拟电压矢量

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双定子轴向磁通永磁发电机齿槽转矩优化

上海电机学院学报 2021年第4期24卷 199-203,210页

作者：卜玉杭王爱元(指导) 秦翌菲上海电机学院电气学院上海201306

为解决传统局部寻优法不能对双定子轴向磁通永磁发电机的多目标优化参数的问题,采用田口优化法优化发电机参数。对双定子轴向磁通永磁发电机的气隙长度、极弧系数和定子槽口宽度进行优化,先建立正交实验矩阵,然后分析3个发电机优化参数... 详细信息

为解决传统局部寻优法不能对双定子轴向磁通永磁发电机的多目标优化参数的问题,采用田口优化法优化发电机参数。对双定子轴向磁通永磁发电机的气隙长度、极弧系数和定子槽口宽度进行优化,先建立正交实验矩阵,然后分析3个发电机优化参数对优化目标的综合影响,得出3个参数的最佳搭配,最后用Maxwell 3D建立三维电机模型进行验证。研究表明,该方法能在不降低电机效率的情况下大幅降低双定子轴向磁通永磁发电机的齿槽转矩。

关键词：齿槽转矩田口法轴向磁通永磁发电机

BDS/Galileo/GPS三频精密单点定位模型比较与分析

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导航定位学报 2021年第1期9卷 78-87,121页

作者：卜宇航李博峰臧楠苟浩洋同济大学测绘与地理信息学院上海200092 哈尔滨工程大学智能科学与工程学院哈尔滨150001 山东省交通规划设计院有限公司济南250031

为了进一步研究多系统三频精密单点定位(PPP)的性能,提出对其不同数学模型的定位性能进行评估比较:分析全球卫星导航系统(GNSS)原始观测方程中码硬件延迟的特性;然后合理参数化三频PPP中的多频码硬件延迟;最后给出北斗卫星导航系统(BDS... 详细信息

为了进一步研究多系统三频精密单点定位(PPP)的性能,提出对其不同数学模型的定位性能进行评估比较:分析全球卫星导航系统(GNSS)原始观测方程中码硬件延迟的特性;然后合理参数化三频PPP中的多频码硬件延迟;最后给出北斗卫星导航系统(BDS)、全球定位系统(GPS)和伽利略卫星导航系统(Galileo)三系统组合的二种可估三频PPP函数模型和随机模型。实验结果表明:三频PPP相比于双频PPP,可以有效地改善定位精度及初始收敛时间,并提高定位结果的可靠性;三系统组合三频PPP静态定位在E、N和U方向的精度分别优于0.8、0.5和1.1 cm,动态定位分别优于1.4、1.0和2.9 cm;三系统组合三频PPP静态定位收敛时间优于21.7 min,动态定位收敛时间优于24.0 min。

关键词：北斗卫星导航系统全球定位系统伽利略卫星导航系统三频精密单点定位非差非组合模型双无电离层组合模型定位性能

600MW超超临界机组四角切圆锅炉燃烧器防结焦优化方法研究

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陕西电力 2016年第7期44卷 84-87页

作者：吴明雨李建亮朱清志步宇航北京京能未来燃气热电有限公司北京102209

为了解决锅炉燃用高硫煤结焦严重的问题,分析了燃烧器结焦的主要原因,建立了某火电厂四角切圆锅炉燃用高硫煤燃烧分析模型,提出燃烧器一、二次风配风优化方法,并进行了数值分析比较。最后通过试验验证了该方法在抑制结焦方面的有效性。

关键词：高硫煤四角切圆锅炉结焦配风

Latest Zircon U-Pb Age of the Baiyingaolao Formation Volcanic Rocks in the Keyihe Area of North-Central Da Hinggan Mountains

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Acta Geologica Sinica(English Edition) 2018年第5期92卷 2034-2035页

作者： WANG Chunyu SUN Deyou TIAN Lihui bu Jun SHANG yuhang College of Earth Sciences Jilin University College of Mining Engineering Heilongjiang University of Science and Technology Oil&Gas Technology Research Institute Changqing Oilfield Company CNPC National Engineering Laboratory for Exploration and Development of Low-Permeability Oil & Gas Field

Objective Mesozoic volcanic rocks are mainly distributed in the Da Hinggan *** Baiyingaolao Formation is the main stratum in this area and has been considered to be formed in the Late *** scholars have researched these Mesozoic volcanic rocks in this area,which have been much debatable（Zhang Xiangxin et al.,2017）.A series of studies focusing on the Baiyingaolao Formation volcanic rocks in the middle-south section of

关键词： Pb ICP MS Latest Zircon U-Pb Age of the Baiyingaolao Formation Volcanic Rocks in the Keyihe Area of North-Central Da Hinggan Mountains