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Structural Isomers:Small Change with Big Difference in Anion Storage

Nano-Micro Letters 2024年第1期16卷 222-234页

作者： Huichao Dai Yuan Chen Yueyue Cao Manli Fu Linnan Guan guoqun zhang Lei Gong Mi Tang Kun Fan Chengliang Wang School of Integrated Circuits Wuhan National Laboratory for Optoelectronics(WNLO)Huazhong University of Science and TechnologyWuhan 430074People’s Republic of China Wenzhou Advanced Manufacturing Institute Huazhong University of Science and TechnologyWenzhou 325035People’s Republic of China Hubei Key Laboratory of Polymer Materials School of Materials Science and EngineeringHubei UniversityWuhan 430062People’s Republic of China School of Chemistry and Environmental Engineering Wuhan Institute of TechnologyWuhan 430073People’s Republic of China

Organic electrode materials are promising for ***,the reported organic electrodes are often facing the challenges of low specific capacity,low voltage,poor rate capability and vague charge storage mechanisms,*** are good platform to investigate the charge storage mechanisms and enhance the performance of batteries,which,however,have not been focused in ***,two isomers are reported for *** a result,the isomer tetrathiafulvalene(TTF)could store two monovalent anions reversibly,deriving an average discharge voltage of 1.05 V and a specific capacity of 220 mAh g−1 at a current density of 2 *** the other hand,the other isomer tetrathianaphthalene could only reversibly store one monovalent anion and upon further oxidation,it would undergo an irreversible solid-state molecular rearrangement to *** molecular rearrangement was confirmed by electrochemical performances,X-ray diffraction patterns,nuclear magnetic resonance spectra,and 1H detected heteronuclear multiple bond correlation *** results suggested the small structural change could lead to a big difference in anion storage,and we hope this work will stimulate more attention to the structural design for boosting the performance of organic batteries.

关键词： Zinc-organic batteries Isomers Solid-state molecular rearrangement Anion storage P-type organic electrode materials

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湖南省农村老年人应急准备现状及影响因素

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护理研究 2024年第8期38卷 1460-1466页

作者：李鑫肖泽梅陈金莉张国群贺英姿长沙医学院护理学院湖南410219

目的:调查农村老年人应急准备、灾难素养和应急能力现状及影响因素。方法:采用方便抽样法,使用公众应急准备现状评价量表、灾难素养评价量表、家庭应急准备能力问卷对湖南省岳阳市坪头村、坪上村及源冲村3个村的357名老年人进行调查。结... 详细信息

目的:调查农村老年人应急准备、灾难素养和应急能力现状及影响因素。方法:采用方便抽样法,使用公众应急准备现状评价量表、灾难素养评价量表、家庭应急准备能力问卷对湖南省岳阳市坪头村、坪上村及源冲村3个村的357名老年人进行调查。结果:农村老年人的应急准备现状、灾难素养、家庭应急准备能力总分分别为48.11(43.00,54.00)分、(66.08±20.67)分、51.01(49.00,53.00)分。农村老年人灾难素养、应急能力与应急准备现状均呈正相关。多元线性回归分析结果显示,灾难素养、对应急准备的态度、是否接受过应急教育或培训、关心本地区传染病发生情况的程度、原来从事的职业及对灾难事件的预期是农村老年人应急准备现状的影响因素(P<0.05)。结论:农村老年人应急准备现状处于中等偏低水平,应加强农村老年人灾难素养和应急能力教育培训,从而提高其应急准备水平。

关键词：农村老年人应急准备灾难素养家庭应急能力影响因素

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Rationally exfoliating chitin into 2D hierarchical porous carbon nanosheets for high-rate energy storage

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Nano Research 2020年第6期13卷 1604-1613页

作者： Lingfeng Gao guoqun zhang Jie Cai Liang Huang Jun Zhou Lina zhang College of Chemistry and Molecular Science Hubei Engineering Center of Natural Polymer-based Medical MaterialsWuhan UniversityWuhan430072China Wuhan National Laboratory for Optoelectronics Huazhong University of Science and TechnologyWuhan430074China

Two-dimensional(2D)carbon nanomaterials with hierarchical porous structure and heteroatoms doping are highly desirable in the fields of energy storage because of their rich active surface and open ion diffusion ***,the scalable preparation of carbon materials simultaneously possessing ultrathin 2D feature and hierarchical pores remains a considerable ***,a facile one-step method to massively fabricate 2D porous chitin nanosheets(coded as PCNs)via a phytic acid assisted top-down exfoliation of bulk chitin under hydrothermal treatment was ***,2D carbon nanosheets with extra-thin thickness(3.6 nm),well-defined hierarchical porosity,high specific surface area(855 m2·g^-1),as well as abundant self-doped heteroatoms(N,O,P)were fabricated by carbonizing the PCNs,and was named as *** as-obtained HPCNs demonstrated remarkable electrochemical performance as electrode material for *** symmetric supercapacitors(SSCs)based on HPCNs exhibited a high specific capacitance of 79 F·g^-1(316 F·g^-1 for single electrode)in 6 M KOH aqueous electrolyte solution,as well as a remarkable energy density of 23.8 W·h·kg^-1 by using 1 M Li2SO4 as *** is also demonstrated that HPCNs/PCNs hybrid dispersions can be used as inks to fabricate conductive films and energy devices with high strength and superior *** work paves a new avenue for the economical and large-scale synthesis of 2D hierarchically porous carbon materials for energy storage related applications.

关键词： two-dimensional carbons materials mass production hierarchical porosity energy storage

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软件定义系统技术研究综述

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空天防御 2024年第2期7卷 1-7,35页

作者：张涛张龙张国群贾桂芬孙俊格西北工业大学软件学院陕西西安710072 上海机电工程研究所上海201109

导弹武器装备当前呈现技术密集、任务型号多样、功能复杂化的发展趋势,面对其高速技术迭代的发展需求,传统上采用单型号独立研制的方式存在研制成本高、技术复用率低、结构紧耦合、系统交联复杂等缺点。为此,针对新兴的软件定义系统技术... 详细信息

导弹武器装备当前呈现技术密集、任务型号多样、功能复杂化的发展趋势,面对其高速技术迭代的发展需求,传统上采用单型号独立研制的方式存在研制成本高、技术复用率低、结构紧耦合、系统交联复杂等缺点。为此,针对新兴的软件定义系统技术,分别从开放式软件定义系统架构、模型驱动的软件定义系统开发、软件定义系统应用服务管理框架、面向软件定义的载荷快速接入管理、软件定义弹性网络等分项关键技术开展综述研究,介绍相关技术发展情况及存在的不足,分析软件定义系统技术的发展方向,旨在为导弹武器装备研制相关技术难题的突破提供参考。

关键词：软件定义系统导弹系统多任务灵活作战快速集成研制

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基于深度强化学习的综合电子系统重构方法

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空天防御 2024年第1期7卷 63-70页

作者：马驰张国群孙俊格吕广喆张涛西北工业大学软件学院陕西西安710072 上海机电工程研究所上海201109 西安航空计算技术研究所陕西西安710119

重构作为综合模块化航空电子系统用来提高容错性和稳定性的常用手段,是指发生某一故障后,系统根据事先预设好的重构蓝图,通过一系列应用迁移动作从故障状态转为正常状态的过程。随着综合电子系统的功能多元化和结构复杂化,提高系统的容... 详细信息

重构作为综合模块化航空电子系统用来提高容错性和稳定性的常用手段,是指发生某一故障后,系统根据事先预设好的重构蓝图,通过一系列应用迁移动作从故障状态转为正常状态的过程。随着综合电子系统的功能多元化和结构复杂化,提高系统的容错性和稳定性显得至关重要。然而现有的人工重构和传统重构算法这两种重构配置蓝图设计方式难以保证综合电子系统的容错性和稳定性。本文针对综合电子系统故障情况,结合深度强化学习算法,对重构蓝图的重构模型进行探索并提出基于优先经验回放的竞争深度Q网络算法(PEP_DDQN),通过优先经验回放机制和SUMTREE批量样本抽取技术提出基于深度强化学习的优先经验回放和竞争深度Q网络重构算法。实验表明,相较于传统强化学习Q-Learning算法和DQN算法实现的重构蓝图生成算法,所提出的PEP_DDQN算法能生成更高质量的蓝图并具有更高的收敛性能与更快的求解速度。

关键词：综合模块化航空电子系统智能重构深度强化学习 DQN算法

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High-Resolution Mass Spectroscopy for Revealing the Charge Storage Mechanism in Batteries: Oxamide Materials as an Example

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Energy & Environmental Materials 2023年第4期6卷 195-202页

作者： Chenyang zhang Yuan Chen Kun Fan guoqun zhang Jincheng Zou Huichao Dai Yanbo Gao Xiaobo Wang Minglei Mao Chengliang Wang School of Optical and Electronic Information Wuhan National Laboratory for Optoelectronics(WNLO)Optics Valley LaboratoryHuazhong University of Science and TechnologyWuhan 430074China Wenzhou Advanced Manufacturing Technology Research Institute Huazhong University of Science and TechnologyWenzhou 325035China

The pursuit of high-performance electrode materials is highly desired to meet the demand of batteries with high energy and power ***,a deep understanding of the charge storage mechanism is always challenging,which limits the development of advanced electrode ***,high-resolution mass spectroscopy(HR-MS)is employed to detect the evolution of organic electrode materials during the redox process and reveal the charge storage mechanism,by using small molecular oxamides as an example,which have ortho-carbonyls and are therefore potential electrochemical active materials for *** HR-MS results adequately proved that the oxamides could reversibly store lithium ions in the voltage window of 1.5–3.8 *** deeper reduction,the oxamides would decompose due to the cleavage of the C–N bonds in oxamide structures,which could be proved by the fragments detected by HR-MS,^(1)H NMR,and the generation of NH_(3)after the reduction of oxamide by *** work provides a strategy to deeply understand the charge storage mechanism of organic electrode materials and will stimulate the further development of characterization techniques to reveal the charge storage mechanism for developing high-performance electrode materials.

关键词： charge storage mechanism high-resolution mass spectroscopy organic batteries organic electrodes oxamides

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Strategy for suppressing abnormal grain growth of ZK60 Mg alloy during solution by pre-compression:A quasi-in-situ study

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Journal of Materials Science & Technology 2024年第4期171卷 115-128页

作者： Zhenxu Wang Liang Chen Jianwei Tang Cunsheng zhang guoqun Zhao Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials(Ministry of Education) Shandong UniversityJinanShandong 250061China Department of Mechanical Engineering Kyushu UniversityFukuoka 819-0395Japan

Abnormal grain growth(AGG)easily takes place in Mg alloys during high-temperature solutions,result-ing in deterioration of mechanical ***,the compression prior to solution(pre-compression)was conducted to suppress AGG,and the microstructure evolution as well as suppressing mechanisms was investigated based on quasi-in-situ *** compression along the transverse direction,//ED grains preferentially nucleated and rapidly grew up,and the initial//ED texture was *** grain growth modes of heat-induced and strain-induced grain boundary migrations were *** former was attributed to the high interfacial energy of grain boundaries with large *** latter consumed the adjacent grains with high storage energy,forming abnormal grains with irregular *** compression with a reduction>6%could obviously suppress *** suppressing effects were mainly attributed to weakening the size advantage of//ED grains,increasing nucleation,reducing grain boundary character distribution,and redistributing storage energy *** 12%compression along the transverse direction,30°misorientation of//ED grains and high energy grain boundaries were ***{10-12}tensile twins and{10-15}high index twins induced by com-pression increased the nucleation of static ***,compression introduces high-density dislocations,which also contributed to suppressing AGG behavior during solution.

关键词： Quasi-in-situ analysis Mg alloy Abnormal grain growth Compression Microstructure

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广东省标准《地质灾害自动化监测规范》解读及应用案例

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广东土木与建筑 2024年第8期31卷 15-20页

作者：卢薇艳金亚兵沈翔劳丽燕张国群深圳市地质局深圳518023

地质灾害具有隐蔽性、突发性、季节性和破坏性等特点,采用实时、连续、在线的自动化监测手段进行灾前预警非常必要。广东省率先编制并发布了地方标准《地质灾害自动化监测规范:DB44/T 2457—2024》[1],将能有效提升广东省地质灾害防灾... 详细信息

地质灾害具有隐蔽性、突发性、季节性和破坏性等特点,采用实时、连续、在线的自动化监测手段进行灾前预警非常必要。广东省率先编制并发布了地方标准《地质灾害自动化监测规范:DB44/T 2457—2024》[1],将能有效提升广东省地质灾害防灾减灾能力和提高保护人民生命与财产安全水平。论文解读了文献[1]的主要内容规定,统一了自动化监测工作方法和技术要求,并在监测内容细化、常用监测方法和设备推选、监测数据质量评价和数据管理、监测预警及系统构建等方面进行了创新性的研究工作;利用典型工程案例,展示了如何正确使用文献[1],如何选定预警指标及其阈值,以及如何合理预警预报等关键技术。

关键词：地质灾害自动化监测规范解读

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基坑土滤砂和制砖就地综合利用绿色施工技术

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广东土木与建筑 2024年第8期31卷 10-14,20页

作者：雷斌孙晓辉童心李凯沙桢晖王志权深圳市工勘岩土集团有限公司深圳518057 深圳大学深圳518060

针对如何高效合理地解决目前基坑土方常规处理方法中浪费土资源、占地面积受限、经济性差、污染环境等问题进行研究,提出一种基坑土就地处理系统及方法,通过在施工现场设置洗滤、压榨、制砖处理设备,将基坑土便捷、高效地转化为洁净砂... 详细信息

针对如何高效合理地解决目前基坑土方常规处理方法中浪费土资源、占地面积受限、经济性差、污染环境等问题进行研究,提出一种基坑土就地处理系统及方法,通过在施工现场设置洗滤、压榨、制砖处理设备,将基坑土便捷、高效地转化为洁净砂、无色清水和环保砖,整体实现基坑土绿色循环再利用,大幅提升环保效益和经济效益,资源节约成效和社会效益显著,是一种施工工艺上的突破和创新。

关键词：基坑土滤砂泥浆压榨残留废渣制砖固液分离循环利用就地处理绿色施工技术

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Robust, breathable, and chemical-resistant polytetrafluoroethylene (PTFE) films achieved by novel in-situ fibrillation strategy for highperformance triboelectric nanogenerators

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Nano Research 2024年第3期17卷 1942-1951页

作者： Jialong Chai Guilong Wang Jinchuan Zhao Guizhen Wang Chao Wei Aimin zhang guoqun Zhao Laboratory for Liquid-Solid Structural Evolution and Processing of Materials(Ministry of Education) Shandong UniversityJinan 250061China Key Laboratory of Chinese Education Ministry for Tropical Biological Resources Hainan UniversityHaikou 570228China

In the era of advanced wearable electronic devices,the triboelectric nanogenerators(TENGs)as energy harvesting and self-powered sensing units hold great *** appropriate triboelectric material is the crucial factor to optimize the performance of TENG,while polytetrafluoroethylene(PTFE)stands out as a highly versatile option among the various *** this study,we present an ultrafine nanofibrous PTFE(NF-PTFE)films prepared by novel in-situ fibrillation strategy as the triboelectric material in TENG *** innovative processing methodology facilely addresses the dilemma between high porosity and fine pore size of traditional porous PTFE films,meanwhile achieves exceptional mechanical strength,hydrophobicity,air permeability,and chemical resistance of the *** the integration of nanofibrous PTFE films into contact-separation mode TENG and droplet-based TENG,these devices realize the peak electrical output of 131 V/10.8μA and 54 V/14μA with great durability,which surpass the performance of TENGs using traditional expanded PTFE ***,a smart glove capable of recognizing hand gestures is proposed,which demonstrates the versatility,flexibility,and practicality of this material for potential use in smart *** reported NF-PTFE film provides insights for the design of high-performance TENG device for advanced wearable electrical applications.

关键词： polytetrafluoroethylene(PTFE) nanofibrous film hydrophobic triboelectric nanogenerator self-powered sensor

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