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A Note on Schwarz-Pick Estimate

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Chinese Annals of mathematics,Series B 2010年第3期31卷 343-346页

作者： yang liu {2. chen department of mathematics Zhejiang Normal University Jinhua 321004 Zhejiang China. department of mathematics Tongji University Shanghai 200092 China

A Schwarz-Pick estimate of higher order derivative for holomorphic functions with positive real part on Bn is presented. This improves the earlier work on Schwarz-Pick estimate of higher order derivatives for holomorp... 详细信息

关键词： Schwarz-Pick estimate Holomorphic function Taylor expansion

An Incentive Mechanism for Federated Learning:A Continuous Zero-Determinant Strategy Approach

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IEEE/CAA Journal of Automatica Sinica 2024年第1期11卷 88-102页

作者： Changbing Tang Baosen yang Xiaodong Xie Guanrong chen Mohammed A.A.Al-qaness yang liu IEEE the College of Physics and Electronic Information Engineering Zhejiang Normal UniversityUniversityJinhua 321004China the School of Mathematical Sciences Zhejiang Normal UniversityJinhua 321004China the department of Electrical Engineering City University of Hong KongHong KongChina Key Laboratory of Intelligent Education Technology and Application of Zhejiang Province Jinhua 321004China

As a representative emerging machine learning technique, federated learning(FL) has gained considerable popularity for its special feature of “making data available but not visible”. However, potential problems remain, including privacy breaches, imbalances in payment, and inequitable *** shortcomings let devices reluctantly contribute relevant data to, or even refuse to participate in FL. Therefore, in the application of FL, an important but also challenging issue is to motivate as many participants as possible to provide high-quality data to FL. In this paper, we propose an incentive mechanism for FL based on the continuous zero-determinant(CZD) strategies from the perspective of game theory. We first model the interaction between the server and the devices during the FL process as a continuous iterative game. We then apply the CZD strategies for two players and then multiple players to optimize the social welfare of FL, for which we prove that the server can keep social welfare at a high and stable level. Subsequently, we design an incentive mechanism based on the CZD strategies to attract devices to contribute all of their high-accuracy data to ***, we perform simulations to demonstrate that our proposed CZD-based incentive mechanism can indeed generate high and stable social welfare in FL.

关键词： Federated learning(FL) game theory incentive mechanism machine learning zero-determinant strategy

Photoluminescence and photothermal conversion in boric acid derived carbon dots for targeted microbial theranostics

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Chinese Chemical Letters 2024年第9期35卷 232-237页

作者： Yiqiao chen Ao liu Biwen {2. Zhenzhen Li Binggang Ye Zhouyi Guo Zhiming liu Haolin chen department of Anesthesiology General Hospital of Southern Theater Command of People’s Liberation ArmyGuangzhou 510010China MOE Key Laboratory of Laser Life Science&Guangdong Provincial Key Laboratory of Laser Life Science College of BiophotonicsSouth China Normal UniversityGuangzhou 510631China Healthy Medical Engineering Technology Research Center Guangdong Food and Drug Vocational CollegeGuangzhou 510520China

Theranostic carbon dots(CDs)have attracted widespread attention recently due to their tunable optical properties and diverse *** fluorescent imaging application,the photothermal property endows CDs with the potential for microbial ***,realization of the effective conversion between fluorescence and heat in one CD system has rarely been ***,we provide a simple strategy for targeted microbial theranostics based on 4-carboxyphenylboronic acid-derived CDs(PCBA-CDs)which possess concentration-dependent photoluminescence/photothermal *** lower concentrations,PCBA-CDs show bright and stable fluorescent signals ranging from blue to *** fluorescence intensity gradually decreases with increasing concentration,while on the contrary,the photothermal effect of PCBA-CDs ascends progressively due to the rearrangement of electronic transitions in aggregated ***-CDs also demonstrate high affinity to the polysaccharide structures on the surface of microbe which allows rapid microbial fluorescence imaging as well as specific photothermal ablation of pathogens in skin wounds using PCBA-CDs at lower and higher concentrations,*** study supplies a facile nanotheranostic strategy for just-in-time microbial management using bioactive CDs.

关键词： Theranostic carbon dots Fluorescence imaging Phenylboronic acid Photothermal therapy Nanotheranostic

SCHWARZ-PICK ESTIMATES FOR BOUNDED HOLOMORPHIC FUNCTIONS ON CLASSICAL DOMAINS

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Acta Mathematica Scientia 2011年第4期31卷 1377-1382页

作者：刘洋陈志华 department of mathematics Zhejiang Normal University department of mathematics Tongji University

In this paper, Schwarz-Pick estimates for high order Fr′echet derivatives of bounded holomorphic functions on three kinds of classical domains are presented. We generalize the early work on Schwarz-Pick estimates of ... 详细信息

关键词： Schwarz-Pick estimate holomorphic functions classical domains

Lignin-reinforced PVDF electrolyte for dendrite-free quasi-solid-state Li metal battery

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Rare Metals 2024年第3期43卷 1006-1016页

作者： Xin-yang chen Xue-Jie Gao Han-Yan Wu Yu-Long {2. Xiao-Fei yang Run-Cang Sun Center for Lignocellulosic Chemistry and Biomaterials College of Light Industry and Chemical EngineeringDalian Polytechnic UniversityDalian116034China Division of Energy Storage Dalian National Laboratory for Clean EnergyDalian Institute of Chemical PhysicsChinese Academy of SciencesDalian116023China School of Chemistry Northeast Normal UniversityChangchun130024China

Quasi-solid-state lithium metal batteries(QSSLMBs)assembled with polyvinylidene fluoride(PVDF)are a promising class of next-generation rechargeable batteries due to their safety,high energy density,and superior interfacial ***,PVDF has a series of inherent drawbacks such as low ionic conductivity,ease of crystallization,and hydrophobic character that leading to poor cell *** tackle these issues,a lignin-reinforced PVDF electrolyte is proposed in this work to solve these drawbacks of PVDF and enhance the comprehensive performance of *** lithophilic polar groups of lignin can promote uniform deposition of Li on the *** with the improved mechanical properties can efficiently prevent Li dendrites penetration through the *** addition,more active sites provided by lignin can also enhance Li^(+)transport and lead to a faster electrochemical reaction *** from the ingenious design,Li symmetric cells with 5%lignin-PVDF quasi-solid-state electrolyte can operate for 900 h at a high current density/capacity of 5 mA·cm^(-2./5 mAh·cm^(-2.,while shortcircuiting occurs after 56 h for the counterpart(pure PVDF).Moreover,a full cell of Li/5%lignin-PVDF/LFP cell demonstrates a high capacity of 96.2.mAh·g^(-1)after 2.00 cycles at 10 *** work is expected to open up promising opportunities to develop other high-energy/power-density QSSLMBs.

关键词： Quasi-solid-state electrolyte Lignin PVDF Dendrite-free Li metal battery

Bioorthogonal microglia-inspired mesenchymal stem cell bioengineering system creates livable niches for enhancing ischemic stroke recovery via the hormesis

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Acta Pharmaceutica Sinica B 2024年第3期14卷 1412-1427页

作者： Jianpei Xu Yinzhe Sun yang You Yuwen Zhang Dan Huang Songlei Zhou Yipu liu Shiqiang Tong Fenfen Ma Qingxiang Song {2.gxiang Dai Suke Li Jigang Lei zhihua Wang Xiaoling Gao Jun {2. Shanghai Pudong Hospital&department of Pharmaceutics School of PharmacyFudan UniversityShanghai 201203China Key Laboratory of Smart Drug Delivery Ministry of EducationSchool of PharmacyFudan UniversityShanghai 201203China department of Pharmacology and Chemical Biology State Key Laboratory of Oncogenes and Related GenesShanghai Universities Collaborative Innovation Center for Translational MedicineShanghai Jiao Tong University School of MedicineShanghai 200025China department of Emergency Shanghai Pudong HospitalFudan University Pudong Medical CenterShanghai 201399China Institute of Science and Technology for Brain-Inspired Intelligence&department of Neurology Fudan UniversityShanghai 201203China department of Rehabilitation Medicine Huashan HospitalFudan UniversityShanghai 201203China Daxing Research Institute University of Science and Technology BeijingBiomedical Industry BaseZhongguancun Science and Technology ParkBeijing 102600China Cellular Biomedicine Group Inc. Shanghai 201210China

Mesenchymal stem cells(MSCs)experience substantial viability issues in the stroke infarct region,limiting their therapeutic efficacy and clinical *** levels of deadly reactive oxygen radicals(ROS)and proinflammatory cytokines(PC)in the infarct milieu kill transplanted MSCs,whereas low levels of beneficial ROS and PC stimulate and improve engrafted MSCs’*** on the intrinsic hormesis effects in cellular biology,we built a microglia-inspired MSC bioengineering system to transform detrimental high-level ROS and PC into vitality enhancers for strengthening MSC *** system is achieved by bioorthogonally arming metabolic glycoengineered MSCs with microglial membrane-coated nanoparticles and an antioxidative extracellular protective *** this system,extracellular ROSscavenging and PC-absorbing layers effectively buffer the deleterious effects and establish a microlivable niche at the level of a single MSC for ***,the infarct’s inanimate milieu is transformed at the tissue level into a new living niche to facilitate *** engineered MSCs achieved viability five times higher than natural MSCs at seven days after transplantation and exhibited a superior therapeutic effect for stroke recovery up to 2. *** vitality-augmented system demonstrates the potential to accelerate the clinical translation of MSC treatment and boost stroke recovery.

关键词： Ischemic stroke Mesenchymal stem cell Cell engineering Hormesis effect Bioorthogonal chemistry Microglia Reactive oxygen spices Proinflammatory cytokines

Analyses of fin ray types to detect strontium markers in juvenile blunt-snout bream Megalobrama amblycephala

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Ecological Processes 2024年第1期13卷 206-216页

作者： Yahua Zhu Tao Jiang Xiubao chen Hongbo liu Quinton Phelps Jian {2. Wuxi Fisheries College Nanjing Agricultural University (WFCNAU) Laboratory of Fishery Microchemistry Freshwater Fisheries Research Center Chinese Academy of Fishery Sciences (FFRCCAFS) department of Biology Missouri State University (DBMSU)

Background Restocking by introducing hatchery-reared fish into wild habitats aids in the restoration of fishery aquatic ecosystems and reefs to increase the abundance of fish resources, restore the ecological balance of water bodies, and enhance ecosystem functioning. Accurately, rapidly, and effectively evaluating the success of restocking using chemical markers（e.g., strontium [Sr]） remains challenging for fisheries management. Consequently, for nonlethal fish sampling, hard tissues, such as fin rays, have received increasing attention as a target for marking method. However, data on the differences in marking different types of fin rays remain limited. Therefore, we exposed juvenile blunt snout bream individuals（Megalobrama amblycephala） to 0（control group） or 800 mg/L of SrCl2.6H2.（marked group） for 5 days and transferred them into normal aerated water for post-immersion culture. We sampled their pectoral, dorsal, ventral, anal, and caudal fin rays. The Sr marks among the fin types were sampled at 0 and 2. days post-immersion and evaluated using an electron probe micro-analyzer（EPMA） for the five-day Sr/Ca ratios, along with line transect and Sr mapping *** Sr marking signatures were observed in all fin types in the marked group, with a success rate of up to 100%. Although marking efficiency varied among the different fin ray types, the highest Sr/Ca ratios were most often detected in the dorsal fin. Cross-sectional Sr concentration maps of all fin rays sampled showed high-Sr domains in the marked group; in contrast, the entire cross-sections of the control group displayed low Sr contents, indicating successful marking *** Fin ray Sr marking is a successful method for juvenile M. amblycephala, with the advantages of nonlethality and negligible sampling injuries, facilitating the rapid and effective evaluation of Sr marking in restocking M. amblycephala.

关键词： Megalobrama amblycephala Juvenile Fin ray Strontium marking Electron probe micro-analyzer

Atmospheric oxidation capacity and O_(3) formation in a coastal city of southeast china:Results from simulation based on four-season observation

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Journal of Environmental Sciences 2024年第2期136卷 68-80页

作者： Gaojie chen Taotao liu Jinsheng chen Lingling Xu Baoye Hu chen yang Xiaolong Fan Mengren Li Youwei Hong Xiaoting Ji Jinfang chen Fuwang Zhang Center for Excellence in Regional Atmospheric Environment Institute of Urban EnvironmentChinese Academy of SciencesXiamen 361021China Key Lab of Urban Environment and Health Institute of Urban EnvironmentChinese Academy of SciencesXiamen 361021China university of Chinese Academy of Sciences Beijing 100049China Minnan normal university Zhangzhou 363000China College of Harbour and Coastal Engineering Jimei UniversityXiamen 361021China Environmental Monitoring Center of Fujian Fuzhou 350013China

The pollution of atmospheric ozone in china shows an obvious upward trend in the past ***,the studies on the atmospheric oxidation capacity and O_(3)formation in four seasons in the southeastern coastal region of china with the rapid urbanization remain ***,a four-season field observation was carried out in a coastal city of southeast china,using an observation-based model combining with the Master Chemical Mechanism,to explore the atmospheric oxidation capacity(AOC),radical chemistry,O_(3)formation pathways and *** results showed that the average net O_(3)production rate(14.55 ppbv/hr)in summer was the strongest,but the average O_(3)concentrations in autumn was *** AOC and ROx levels presented an obvious seasonal pattern with the maximum value in summer,while the OH reactivity in winter was the highest with an average value of 2..75 sec^(-1).The OH reactivity was dominated by oxygenated VOCs(OVOCs)(30.6%-42.8%),CO(2..2.-2..8%),NO_(2.(13.6%-2..0%),and alkenes(8.4%-12.5%)in different *** photolysis dominated OH primary source on daytime in winter,while in other seasons,HONO photolysis in the morning and ozone photolysis in the afternoon contributed *** analysis indicated that O_(3)production was controlled by VOCs in spring,autumn and winter,but a VOC-limited and NOx-limited regime in summer,and alkene and aromatic species were the major controlling factors to O_(3)***,the study characterized the atmospheric oxidation capacity and elucidated the controlling factors for O_(3)production in the coastal area with the rapid urbanization in china.

关键词： Atmospheric oxidation capacity Radical chemistry Ozone production Sensitivity analysis

Double Moving Extremes Ranked Set Sampling Design

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Acta Mathematicae Applicatae Sinica 2024年第1期40卷 75-90页

作者： Meng chen Wang-xue chen Rui {2. department of mathematics and Statistics Jishou UniversityJishou416000China

The traditional simple random sampling(SRS)design method is inefficient in many *** proposed some new designs to increase *** this paper,as a variation of moving extremes ranked set sampling(MERSS),double MERSS(DMERSS)is proposed and its properties for estimating the population mean are *** turns out that,when the underlying distribution is symmetric,DMERSS gives unbiased estimators of the population ***,it is found that DMERSS is more efficient than the SRS and MERSS methods for usual symmetric distributions(normal and uniform).For asymmetric distributions considered in this study,the DMERSS has a small bias and it is more efficient than SRS for usual asymmetric distribution(exponential)for small sample sizes.

关键词： double moving extremes ranked set sampling symmetric distribution efficiency