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A note on exponential convergence of Cesàro weighted Birkhoff average and multimodal weighted approach

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Acta Mathematica Sinica,English Series 2024年

作者： zhicheng tong Yong LI School of Mathematics Jilin University School of Mathematics and Statistics Center for Mathematics and Interdisciplinary Sciences Northeast Normal University

This note concerns the rapid uniform convergence of Cesàro weighted Birkhoff averages via irrational rotations on tori under certain conditions, involving arbitrary polynomial and exponential convergence rate. We discuss both finite dimensional and infinite dimensional cases, and give Diophantine rotations as examples. These provide the universality of rapid convergence for Cesàro weighted type, which is quite different from Lp(p> 1) convergence for the unweighted one. We also show a certain optimality about our convergence rate. Besides, we introduce a multimodal weighted approach to adapt to the data sparsity, which still preserves exponential convergence.

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Active Micro-Nano-Collaborative Bioelectronic Device for Advanced Electrophysiological Recording

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Nano-Micro Letters 2024年第7期16卷 244-264页

作者： Yuting Xiang Keda Shi Ying Li Jiajin Xue zhicheng tong Huiming Li Zhongjun Li Chong Teng Jiaru Fang Ning Hu Department of Chemistry Zhejiang-Israel Joint Laboratory of Self-Assembling Functional MaterialsZJU-Hangzhou Global Scientific and Technological Innovation CenterZhejiang UniversityHangzhou 310058People’s Republic of China School of Basic Medical Sciences Zhejiang Chinese Medical UniversityHangzhou 310053People’s Republic of China General Surgery Department Children’s HospitalZhejiang University School of MedicineNational Clinical Research Center for Children’s HealthHangzhou 310052People’s Republic of China Department of Lung Transplantation and General Thoracic Surgery The First Affiliated HospitalZhejiang University School of MedicineHangzhou 310003People’s Republic of China Department of Orthopedics The Fourth Affiliated HospitalZhejiang University School of MedicineYiwu 322005People’s Republic of China School of Electronics and Information Technology Sun Yat-Sen UniversityGuangzhou 510006People’s Republic of China Department of Obstetrics and Gynecology The Tenth Affiliated HospitalSouthern Medical UniversityDongguan 523059People’s Republic of China Dongguan Key Laboratory of Major Diseases in Obstetrics and Gynecology Dongguan 523059People’s Republic of China

The development of precise and sensitive electrophysiological recording platforms holds the utmost importance for research in the fields of cardiology and *** recent years,active micro/nano-bioelectronic devices have undergone significant advancements,thereby facilitating the study of *** distinctive configuration and exceptional functionality of these active micro-nano-collaborative bioelectronic devices offer the potential for the recording of high-fidelity action potential signals on a large *** this paper,we review three-dimensional active nano-transistors and planar active micro-transistors in terms of their applications in electroexcitable cells,focusing on the evaluation of the effects of active micro/nano-bioelectronic devices on electrophysiological *** forward to the possibilities,challenges,and wide prospects of active micro-nano-devices,we expect to advance their progress to satisfy the demands of theoretical investigations and medical implementations within the domains of cardiology and neuroscience research.

关键词： Active micro/nano collaborative bioelectronic device Three-dimensional active nano-transistor Planar active microtransistor Electrophysiology

Silicon photonic integrated interrogator for fiber-optic distributed acoustic sensing

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Photonics Research 2024年第3期12卷 465-473页

作者： zhicheng JIN JIAGENG CHEN YANMING CHANG QINGWEN LIU ZUYUAN HE State Key Laboratory of Advanced Optical Communication System and Networks Department of Electronic EngineeringShanghai Jiao Tong UniversityShanghai 200240China

Distributed acoustic sensing(DAS)technology has been a promising tool in various ***,the large size and relatively high cost of DAS equipment composed of discrete devices restrict its further popularization to some degree,and the photonic integration technology offers a potential *** this paper,we demonstrate an integrated interrogator for DAS on the silicon-on-insulator(SOI)*** design of the chip revolves around a Mach–Zehnder modulator(MZM)transmitter and a dual-quadrature and dualpolarization coherent *** integrated interrogator supports multiple DAS schemes,including the time-gated digital optical frequency domain reflectometry(TGD-OFDR),which is adopted for system performance evaluation.59■strain resolution in 12.1km sensing fiber with 1.14 m spatial resolution(SR)is ***,along 49.0 km sensing fiber,81■strain resolution with 3.78 m SR is *** results show that the integrated interrogator has comparable performance to the discrete DAS *** the best of our knowledge,this is the first dedicated on-chip DAS interrogator,which validates the effectiveness of the blend of photonics integration and DAS technology.

关键词： fiber polarization modulator

东亚地区栓皮栎叶片表皮毛空间变异特征及其与气孔的协同关系

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Journal of Plant Ecology 2024年第3期17卷 153-161页

作者： Yanhua Zhu Ji Zheng Hongzhang Kang Nan Hui Shan Yin zhicheng Chen Baoming Du Chunjiang Liu School of Agriculture and Biology Shanghai Jiao Tong UniversityShanghai 200240China Instrumental Analysis Center Shanghai Jiao Tong UniversityShanghai 200240China School of Design Shanghai Jiao Tong UniversityShanghai 200240China Shanghai Urban Forest Ecosystem Research Station State Forestry AdministrationShanghai 200240China Shanghai Yangtze River Delta Ecoenvironmental Change and Management Observation and Research Station Ministry of Science and TechnologyShanghai 200240China Key Laboratory of Forest Ecology and Environment of National Forestry and Grassland Administration Ecology and Nature Conservation InstituteChinese Academy of ForestryBeijing 100091China

理解植物功能性状的地理变异对预测全球气候变化下的植物响应至关重要。叶片表皮毛由表皮细胞发育而来,具有调节叶片温度和控制气体交换的功能,然而大的地理尺度上叶片表皮毛如何变异,以及它们与气孔之间的关系仍不清楚。本研究以栓皮栎... 详细信息

理解植物功能性状的地理变异对预测全球气候变化下的植物响应至关重要。叶片表皮毛由表皮细胞发育而来,具有调节叶片温度和控制气体交换的功能,然而大的地理尺度上叶片表皮毛如何变异,以及它们与气孔之间的关系仍不清楚。本研究以栓皮栎(Quercus variabilis)为研究对象,分析了东亚地区44个种群叶片表皮毛密度,并评估了它们与气候因子和气孔等性状之间的相关性。同时,为了进一步检测环境变化下的表皮毛响应特征以及与气孔之间的协同关系,本研究利用其中15个种群开展了同质园试验。研究结果发现,栓皮栎叶片表皮毛密度平均值为459.78个mm^(−2),变异范围为325.79–552.38 mm^(−2)。表皮毛密度会随纬度增加而增加,随经度减少而减少,并且与温度和降水呈负相关。同时发现,无论是在野外还是在同质园,叶片表皮毛密度均与气孔密度呈正相关,并且两者均会随干旱强度的增加而增加。这些结果表明,面对环境变化叶片表皮毛密度具有高度的适应性变异,并且可与气孔协同适应这种变化。该研究结果对加深理解气候变化下植物适应策略以及叶片功能性状之间的协同互作具有重要意义。

关键词：叶片功能性状表皮毛气孔性状-性状关系性状-环境关系气候变化

Experimental observation of multiple topological nodal structure in LaSb_(2)

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Science China(Physics,Mechanics & Astronomy) 2024年第4期67卷 138-145页

作者： Yuxi Qiao Fuyi Wang Huaiqiang Wang Zicheng Tao zhicheng Jiang Zhengtai Liu Soohyun Cho Fayuan Zhang Qingkai Meng Wei Xia Yichen Yang Zhe Huang Jishan Liu Zhonghao Liu Zengwei Zhu Shan Qiao Yanfeng Guo Haijun Zhang Dawei Shen State Key Laboratory of Functional Materials for Informatics Shanghai Institute of Microsystem and Information TechnologyChinese Academy of SciencesShanghai 200050China National Synchrotron Radiation Laboratory and School of Nuclear Science and TechnologyUniversity of Science and Technology of ChinaHefei 230026China National Laboratory of Solid State Microstructures School of PhysicsNanjing UniversityNanjing 210093China School of Physics and Technology Nanjing Normal UniversityNanjing 210023China School of Physical Science and Technology ShanghaiTech UniversityShanghai 201210China Shanghai Synchrotron Radiation Facility Shanghai Advanced Research InstituteChinese Academy of SciencesShanghai 201210China Shenzhen Institute for Quantum Science and Engineering Southern University of Science and TechnologyShenzhen 518055China Wuhan National High Magnetic Field Center and School of Physics Huazhong University of Science and TechnologyWuhan 430074China ShanghaiTech Laboratory for Topological Physics ShanghaiTech UniversityShanghai 201210China Institute of High-Pressure Physics School of Physical Science and Technology Ningbo UniversityNingbo 315211China Collaborative Innovation Center of Advanced Microstructures Nanjing UniversityNanjing 210093China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China

Unconventional fermions in the immensely studied topological semimetals are the source for rich exotic topological ***,using symmetry analysis and first-principles calculations,we propose the coexistence of multiple topological nodal structure in LaSb_(2),including topological nodal surfaces,nodal lines and in particular eightfold degenerate nodal points,which have been scarcely observed in a single ***,utilizing angle-resolved photoemission spectroscopy,we confirm the existence of nodal surfaces and eightfold degenerate nodal points in LaSb_(2).The intriguing multiple topological nodal structure might play a crucial role in giving rise to the large linear *** work renews the insights into the exotic topological phenomena in LaSb_(2).

关键词： eightfold degenerate points multiple topological nodal structure angle-resolved photoemission spectroscopy linear unsaturated magnetoresistance

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叶尖定时测量误差的高精度实验分析与修正

航空动力学报 2024年第7期39卷 238-249页

作者：蒙一鸣肖志成欧阳华上海交通大学航空发动机研究院上海200240 上海交通大学燃气轮机与民用航空发动机教育部工程研究中心上海200240

叶顶位移的精确测量是叶尖定时(BTT)技术应用于旋转叶片振动模态重构和实时状态监测的基础.设计了一套基于激光位移传感器的高精度BTT标定装置,在实验中直接获取叶顶位移的时域标定数据,并以此确定了转速波动是叶顶位移测量误差的主要... 详细信息

叶顶位移的精确测量是叶尖定时(BTT)技术应用于旋转叶片振动模态重构和实时状态监测的基础.设计了一套基于激光位移传感器的高精度BTT标定装置,在实验中直接获取叶顶位移的时域标定数据,并以此确定了转速波动是叶顶位移测量误差的主要来源之一.在此基础上,提出了局部5阶拟合的转速波动修正方法以提升BTT测量精度,并在标定装置上完成实验验证.结果表明:局部5阶拟合的转速波动修正方法在不同工况下均能有效提高BTT测量准确度.在旋转叶片非线性升转状态下测量误差最高降低90%;在恒定转速条件下误差可以降低38%至63%.将该算法应用在一台单级轴流压气机的实验数据中,修正的误差达0.4mm,有效降低了 BTT技术实时测量叶顶位移量的不确定度.

关键词：叶尖定时叶顶位移转速波动标定装置误差分析

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UV/H_(2)O_(2)降解罗丹明B综合实验设计

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实验技术与管理 2024年第3期41卷 68-75页

作者：岳琳王嘉新杨智程童嘉鹏廉静河北科技大学环境科学与工程学院河北省污染防治生物技术重点实验室河北石家庄050000

该文设计了利用UV/H_(2)O_(2)工艺降解染料废水中有机污染物罗丹明B(Rhodamine B,RhB)的综合实验,并采用单因素实验和响应曲面法优化实验条件。实验结果表明UV/H_(2)O_(2)工艺降解RhB过程符合假一级动力学方程,H_(2)O_(2)投加量和紫外... 详细信息

该文设计了利用UV/H_(2)O_(2)工艺降解染料废水中有机污染物罗丹明B(Rhodamine B,RhB)的综合实验,并采用单因素实验和响应曲面法优化实验条件。实验结果表明UV/H_(2)O_(2)工艺降解RhB过程符合假一级动力学方程,H_(2)O_(2)投加量和紫外光强度的交互作用是降解RhB最显著的影响因素。当H_(2)O_(2)的投加量为47.45 mL/L、水体初始pH值为8.11、紫外光强度为730μW/cm^(2)时,反应120 min后,RhB的理论去除率为92.44%,与验证实验结果的相对偏差为0.89%。由紫外-可见光谱和三维荧光光谱扫描结果可知,RhB在反应过程中被有效降解。该实验利用两种实验方法优化工艺条件,有助于提高学生在科研训练中对反应影响因素、动力学拟合及实验条件优化的认识。

关键词： UV/H_(2)O_(2) 罗丹明B 单因素实验响应曲面法

广西北部湾地区热带气旋频数预测研究——基于线性回归模型

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北部湾大学学报 2022年第4期37卷 1-5页

作者：黎树式黄鹄佟智成田义超潘洁广西北部湾海洋灾害研究重点实验室广西钦州535011 北部湾大学资源与环境学院广西钦州535011 钦州市海洋局广西钦州535019

热带气旋是世界上最严重的自然灾害之一,深刻影响着全球沿海地区的社会经济发展,做好热带气旋频数预测可以减少热带气旋造成的灾害损失。本文选取1960—2018年影响广西北部湾地区的热带气旋数据,分析影响北部湾地区热带气旋的路径变化... 详细信息

热带气旋是世界上最严重的自然灾害之一,深刻影响着全球沿海地区的社会经济发展,做好热带气旋频数预测可以减少热带气旋造成的灾害损失。本文选取1960—2018年影响广西北部湾地区的热带气旋数据,分析影响北部湾地区热带气旋的路径变化、数量变化、不同热带气旋年的气温变化、风速变化、年日照时数变化和海表温度变化的因素;构建北部湾地区热带气旋频数预测模型,并采用多元线性回归方法检验该模型的预测结果。结果表明,该模型可以用于预测未来年份影响广西北部湾地区的热带气旋个数,为该地区的防灾减灾提供科学依据。

关键词：广西北部湾热带气旋线性回归

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超高压处理对Feta奶酪成熟期限的影响

中国食品学报 2013年第3期13卷 26-34页

作者：郑晓莹李志成童伟熊清权苏晋文任娇西北农林科技大学食品科学与工程学院陕西杨凌712100

为缩短Feta奶酪的成熟期,在盐渍前对Feta奶酪进行超高压处理,研究Feta奶酪成熟期间的理化特性和流变学特性。结果表明:超高压处理后的Feta奶酪pH值、FDM、PDM、12%TCA-SN/TN及硬度的变化趋势与对照组一致,在Feta奶酪成熟期间pH值先下降... 详细信息

为缩短Feta奶酪的成熟期,在盐渍前对Feta奶酪进行超高压处理,研究Feta奶酪成熟期间的理化特性和流变学特性。结果表明:超高压处理后的Feta奶酪pH值、FDM、PDM、12%TCA-SN/TN及硬度的变化趋势与对照组一致,在Feta奶酪成熟期间pH值先下降后上升,FDM、PDM及硬度值均呈下降趋势,12%TCA-SN/TN呈上升趋势。超高压处理可以显著加快蛋白质的降解,其中200MPa下保压15min处理促熟效果最好,可将Feta奶酪的成熟期由30d缩短至7～14d。

关键词： Feta奶酪超高压成熟期限