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Trotter–Kato Approximations of Impulsive Neutral SPDEs in Hilbert Spaces

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Acta Mathematica Sinica,English Series 2024年第5期40卷 1229-1243页

作者： Ming LIU xia ZHANG Ling Fei DAI School of Mathematical Sciences Tiangong UniversityTianjin 300387P.R.China

This paper studies a class of impulsive neutral stochastic partial differential equations in real Hilbert *** main goal here is to consider the Trotter-Kato approximations of mild solutions of such equations in the pth-mean(p≥2).As an application,a classical limit theorem on the dependence of such equations on a parameter is *** novelty of this paper is that the combination of this approximating system and such equations has not been considered before.

关键词： Impulsive neutral stochastic partial diferential equation Trotter-Kato approximations classical limit theorem

Developmental Patterns and Gender Differences of Vocal Production in Marmoset Monkeys

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Neuroscience Bulletin 2024年第1期40卷 133-138页

作者： Ruixin An Chaocheng Lu Chen Wang Liangtang Chang Junfeng Huang Fan Jiang Tian-Le Xu neng Gong Center for Brain Science Shanghai Children's Medical CenterShanghai Jiao Tong University School of MedicineShanghai 200127China Department of Anatomy and Physiology Shanghai Jiao Tong University School of MedicineShanghai 200025China Department of Critical Care Medicine Huashan HospitalFudan University12 Middle Wulumuqi RoadShanghai 200040China Institute of Neuroscience Key Laboratory of Primate NeurobiologyCAS Center for Excellence in Brain Science and Intelligence TechnologyChinese Academy of SciencesShanghai 200031China Lingang Laboratory Shanghai 200031China Shanghai Center for Brain Science and Brain-Inspired Technology Shanghai 201210China

Dear Editor,The common marmoset(Callithrix jacchus),a small New World monkey species,is considered an ideal non-human primate model for studying the evolution and neural mechanism of vocal behavior due to their rich call repertoire and vocal communication[1-3].Especially,the early vocal development of marmoset monkeys has attracted much attention,because newborn marmosets have been shown to exhibit a vocal development *** two months after birth,marmosets'vocalizations undergo dramatic changes from cries to adult-like mature calls,a process that is influenced not only by inner physical maturation but also by parental care and feedback[4].

关键词： parental birth Pattern

Robust boundary-induced bulk propagations in elastic waveguides with nonplanar surfaces

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Science China(Physics,Mechanics & Astronomy) 2024年第4期67卷 88-96页

作者： Baizhan xia Jielong Zhang Zihan Jiang Jianting Liu State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body Hunan UniversityChangsha 410082China College of Mechanical and Vehicle Engineering Hunan UniversityChangsha 410082China

Trivial elastic waveguides induced by line defects and nontrivial elastic waveguides protected by topological edge states have been extensively examined in planar waveguide *** these investigations,little is known about topologically protected bulk states and their resulting robust transmission properties,especially in nonplanar elastic waveguides with folded,curved,and twisted *** Dirac waveguides with robust boundary-induced bulk states are *** states arise from the truncated boundaries of bulks with linear Dirac conical dispersions,differing from topologically protected edge states ensured by the bulk-edge *** proof is provided,in which boundary-induced bulk states show robustly high-throughput transmissions along the waveguides,even with folded,curved,and twisted *** results not only open up new avenues for examining novel topological phenomena about bulk but also offer new platforms for developing topological devices with nonplanar surfaces.

关键词： elastic waveguides boundary-induced bulk propagations Dirac conical dispersions nonplanar surfaces

Configuration Synthesis and Grasping Performance Analysis of Multi-Loop Coupling Capture Mechanism for Launch and Recovery of Torpedo-Shaped Autonomous Underwater Vehicle

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China Ocean Engineering 2024年第3期38卷 453-466页

作者： ZHANG Guo-xing xia Xin-lu GUO Jin-wei School of Mechanical Engineering Jiangsu University of Science and TechnologyZhenjiang 212100China

Research of capture mechanisms with strong capture adaptability and stable grasp is important to solve the problem of launch and recovery of torpedo-shaped autonomous underwater vehicles(AUVs).A multi-loop coupling capture mechanism with strong adaptability and high retraction rate has been proposed for the launch and recovery of torpedo-shaped AUVs with different morphological ***,the principle of capturing motion retraction is described based on the appearance characteristics of torpedo-shaped AUVs,and the configuration synthesis of the capture mechanism is carried out using the method of constrained chain ***,the screw theory is employed to analyze the degree of freedom(DoF)of the capture ***,the 3D model of the capture mechanism is established,and the kinematics and dynamics simulations are carried *** with the capture orientation requirements of the capture mechanism,the statics and vibration characteristics analyses are carried ***,considering the capture process and the underwater working environment,the motion characteristics and hydraulics characteristics of the capture mechanism are ***,a principle prototype is developed and the torpedo-shaped AUVs capture experiment is *** work provides technical reserves for the research and development of AUV capture special equipment.

关键词： capture mechanism torpedo-shaped AUVs configuration synthesis launch and recovery grasping performance analysis

Intensifying electrified flow-through water treatment technologies via local environment modification

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Frontiers of Environmental Science & Engineering 2024年第6期18卷 17-25页

作者： Zheng-Yang Huo xiaoxiong Wang xia Huang Menachem Elimelech School of Environment and Natural Resources Institute of Ecological CivilizationRenmin University of ChinaBeijing 100872China Institute for Ocean Engineering Tsinghua Shenzhen International Graduate SchoolTsinghua UniversityShenzhen 518055China Center of Double Helix Tsinghua Shenzhen International Graduate SchoolTsinghua UniversityShenzhen 518055China State Key Joint Laboratory of Environment Simulation and Pollution Control School of EnvironmentTsinghua UniversityBeijing 100084China Department of Chemical and Environmental Engineering Yale UniversityNew HavenCT 06520-8286USA

Removing high-risk and persistent contaminants from water is challenging,because they typically exist at low concentrations in complex water *** flow-through technologies are viable to overcome the limitations induced by mass transport for efficient contaminant *** the local environment of the flow-through electrodes offers opportunities to further improve the reaction kinetics and selectivity for achieving near-complete removal of these contaminants from ***,we present state-of-the-art local environment modification approaches that can be incorporated into electrified flow-through technologies to intensify water *** first show methods of nanospace incorporation,local geometry adjustment,and microporous structure optimization that can induce spatial confinement,enhanced local electric field,and microperiodic vortex,respectively,for local environment *** then discuss why local environment modification can complement the flow-through electrodes for improving the reaction rate and ***,we outline appropriate scenarios of intensifying electrified flow-through technologies through local environment modification for fit-for-purpose water treatment applications.

关键词： Point-of-use water treatment Electrified membrane Advection-enhanced mass transport Water decontamination and disinfection Emerging contaminants

Facile preparation of Fe/N-based biomass porous carbon composite towards enhancing the thermal decomposition of DAP-4

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Defence Technology（防务技术） 2024年第1期31卷 288-294页

作者： Er-hai An xiao-xia Li Cun-juan Yu Ying-xin Tan Zi-jun Fan Qing-xia Li Peng Deng Xiong Cao School of Environment and Safety Engineering North University of ChinaTaiyuan030051PR China College of Safety and Emergency Management Engineering Taiyuan University of Science and TechnologyTaiyuan030024PR China

Fe/N-based biomass porous carbon composite(Fe/N-p Carbon) was prepared by a facile high-temperature carbonization method from biomass,and the effect of Fe/N-p Carbon on the thermal decomposition of energetic molecular perovskite-based material DAP-4 was *** porous carbonaceous materials was considered as the micro/nano support layers for in situ deposition of Fe/N ***/Np Carbon was prepared simply by the high-temperature carbonization *** was found that it showed the inherent catalysis properties for thermal decomposition of *** heat release of DAP-4/Fe/N-p Carbon by DSC curves tested had increased slightly,compared from DAP-4/Fe/N-p *** decomposition temperature peak of DAP-4 at the presence of Fe/N-p Carbon had reduced by 79°C from384.4°C(pure DAP-4) to 305.4°C(DAP-4/Fe/N-p Carbon-3).The apparent activation energy of DAP-4thermal decomposition also had decreased by 29.1 J/*** possible catalytic decomposition mechanism of DAP-4 with Fe/N-p Carbon was proposed.

关键词： Biomass materials Porous carbon DAP-4 Thermal decomposition Facile method

改进遗传算法在干式电力变压器优化设计中的应用

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电工电气 2014年第6期 40-42页

作者：韩能霞甘肃电力变压器厂甘肃兰州730046

介绍了遗传算法的基本原理及算法步骤,对其编码与解码方案、约束条件的处理、搜索速度、全局寻优等进行了改造,使新群体的整体素质更好,加快了寻优过程。采用改进的遗传算法对干式变压器的电磁计算设计进行了优化,并应用于SGB-800/10干... 详细信息

介绍了遗传算法的基本原理及算法步骤,对其编码与解码方案、约束条件的处理、搜索速度、全局寻优等进行了改造,使新群体的整体素质更好,加快了寻优过程。采用改进的遗传算法对干式变压器的电磁计算设计进行了优化,并应用于SGB-800/10干式电力变压器的单目标和双目标的优化设计。通过实例参数对比分析,表明该算法切实可行,优化效果较好。

关键词：干式变压器改进的遗传算法优化设计

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双拾取结构WPT系统稳定性分析

电力科学与技术学报 2019年第1期34卷 54-58页

作者：连海生夏能弘田孟林上海电力学院上海200090 国网山东省电力公司济宁供电公司山东济宁272000

双拾取结构在大功率无线电能传输系统得到广泛应用,双拾取线圈间互感的影响可通过外加补偿电容消除,然而该方法可能导致初级侧出现多谐振点,造成系统不稳定。在此背景下,首先,利用互感电路理论对双拾取结构进行分析,得到次级侧到初级侧... 详细信息

双拾取结构在大功率无线电能传输系统得到广泛应用,双拾取线圈间互感的影响可通过外加补偿电容消除,然而该方法可能导致初级侧出现多谐振点,造成系统不稳定。在此背景下,首先,利用互感电路理论对双拾取结构进行分析,得到次级侧到初级侧的反映阻抗;其次,提出基于调谐与调补偿电容的2种电感补偿方法,并根据初级零相角频率须等于次级频率的稳定条件,进一步分析拾取线圈间的互感对系统稳定性的影响,获得拾取线圈的品质因数与初、次级线圈之间的耦合系数之间的关系,得到判断系统稳定的条件。最后,通过仿真验证理论分析的正确性。

关键词：无线电能传输双拾取结构反映阻抗互感耦合

Joint Optimization of Trajectory and Task Offloading for Cellular-Connected Multi-UAV Mobile Edge Computing

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Chinese Journal of Electronics 2024年第3期33卷 823-832页

作者： Jingming xia Yufeng LIU Ling TAN School of Artificial Intelligence Nanjing University of Information Science and Technology Engineering Research Center of Digital Forensics Ministry of Education Nanjing University of Information Science and Technology

Since the computing capacity and battery energy of unmanned aerial vehicle(UAV) are constrained,UAV as aerial user is hard to handle the high computational complexity and time-sensitive *** paper investigates a cellular-connected multi-UAV network supported by mobile edge *** UAVs carrying tasks fly from a given initial position to a termination position within a specified *** handle the large number of tasks carried by UAVs,we propose a energy cost of all UAVs based problem to determine how many tasks should be offloaded to high-altitude balloons(HABs) for computing,where UAV-HAB association,the trajectory of UAV,and calculation task splitting are jointly ***,the formulated problem has nonconvex ***,an efficient iterative algorithm by applying successive convex approximation and the block coordinate descent methods is put ***,in each iteration,the UAV-HAB association,calculation task splitting,and UAV trajectory are alternately ***,for the nonconvex UAV trajectory optimization problem,an approximate convex optimization problem is *** numerical results indicate that the scheme of this paper proposed is guaranteed to converge and also significantly reduces the entire power consumption of all UAVs compared to the benchmark schemes.

关键词： Energy consumption Multi-access edge computing Costs Power demand Autonomous aerial vehicles Iterative algorithms Convex functions