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Defects and morphology engineering for constructing V_(s)-Ni_(3)S_(2)@V_(s)-Cu_(2)S nanotube heterojunction arrays toward efficient bifunctional electrocatalyst for overall water splitting

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Journal of Energy Chemistry 2024年第7期94卷 29-40页

作者： Wenyuan Sun Alan Meng lei Wang Guicun Li Jinfeng Cui yongkai Sun Zhenjiang Li College of materials Science and Engineering Qingdao University of Science and TechnologyQingdao 266042ShandongChina Key Laboratory of Optic-electric Sensing and Analytical Chemistryfor Life Science MOE College of Chemistry and Molecular EngineeringQingdao Universityof Science and TechnologyQingdao 266042ShandongChina College of Environment and Safety Engineering Qingdao University of Science and TechnologyQingdao 266042ShandongChina Qingdao huanghai University Qingdao 266000ShandongChina College of Electromechanical Engineering Qingdao University of Science and TechnologyQingdao 266061ShandongChina

The development of highly active,stable and inexpensive electrocatalysts for hydrogen production by defects and morphology engineering remains a great ***,S vacancies-rich Ni_(3)S_(2)@Cu_(2)S nan-otube heterojunction arrays were in-situ grown on copper foam(V_(s)-Ni_(3)S_(2)@V_(s)-Cu_(2)S NHAs/CF)for efficient electrocatalytic overall water *** the merits of nanotube arrays and efficient electronic mod-ulation drived by the OD vacancy defect and 2D heterojunction defect,the resultant V_(s)-Ni_(3)S_(2)@V_(s)-Cu_(2)S NHAs/CF electrocatalyst exhibits excellent electrocatalytic activity with a low overpotential of 47 mV for the hydrogen evolution reaction(HER)at 10 ma cm^(-2) current density,and 263 mV for the oxygen evolution reaction(OER)at 50 ma cm^(-2) current density,as well as a cell voltage of 1.48 V at 10 ma cm^(-2).Moreover,the nanotube heterojunction arrays endows V_(s)-Ni_(3)S_(2)@V_(s)-Cu_(2)S NHAs/CF with outstanding stability in long-term catalytic processes,as confirmed by the continuous chronopotentiom-etry tests at current densities of 10 ma cm^(-2) for 100 h.

关键词： Nanotubearrays Heterojunction Vacancy Bifunctional electrocatalyst Overall water splitting

Food-Borne Poisoning Accident from Amanitin Toxin in Wild Mushrooms—Xingtai City,Hebei Province,China,2023

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China CDC weekly 2024年第3期6卷 56-59页

作者： Baopu Lv Liang Liu Hao Xiao Qingbing Meng Rui Zhang Yaqing An Yingli Jin yu ma Hengbo Gao yongkai Li Qian He yutao Zhang Changqing Liu Xiaoyan Luo Xiaomin Xu Fenshuang Zheng Yingping Tian Hongshun Zhang Dongqi Yao Emergency Department The Second Hospital of Hebei Medical UniversityShijiazhuang CityHebei ProvinceChina National Institute of Occupational Health and Poison Control Chinese Centre for Disease Control and PreventionBeijingChina Hebei Provincial Center for Disease Control and Prevention Shijiazhuang CityHebei ProvinceChina Zhejiang Provincial Center for Disease Control and Prevention Hangzhou CityZhejiang ProvinceChina Emergency Department The Affiliated Hospital of Yunnan UniversityKunming CityYunnan ProvinceChina

What is already known about this topic?Fatal poisonings caused by wild mushrooms containing amanita toxins pose a significant threat in the southern regions of *** toxins primarily induce gastrointestinal symptoms initially,which are then followed by potentially life-threatening acute liver *** is added by this report?This report contributes to the existing knowledge on these cases of poisoning by documenting the second occurrences in Hebei Province and the first occurrences in Xingtai *** individuals reported consuming wild mushrooms from the same origin,and laboratory tests confirmed the presence ofα-amanitin in their blood *** are the implications for public health practice?This underscores the risk associated with the collection and consumption of amanita toxin-containing mushrooms in *** is important to note that the identification of toxic and non-toxic mushrooms should not solely rely on personal experience or appearance.

关键词： Hebei consuming initially

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基于新型电力系统的储能设备投资决策

系统管理学报 2024年第5期33卷 1194-1203页

作者：陈威马永开白春光成都理工大学管理科学学院成都610059 电子科技大学经济与管理学院成都611731

针对新型电力系统中谁来投资可再生能源电力储能设备的问题,构建了由发电企业和售电企业组成的新型电力系统。考虑了发电企业(可再生能源与传统能源一体化)、售电企业以及可再生能源企业分别投资建设储能设备3种情形,构建了相应的Stacke... 详细信息

针对新型电力系统中谁来投资可再生能源电力储能设备的问题,构建了由发电企业和售电企业组成的新型电力系统。考虑了发电企业(可再生能源与传统能源一体化)、售电企业以及可再生能源企业分别投资建设储能设备3种情形,构建了相应的Stackelberg模型,采用逆向归纳法进行求解。基于均衡结果,主要研究结论如下:(1)当可再生能源发电企业投资储能设备时,消费者可以支付更低的电价,有助于提升电力需求量,进而实现最高的社会福利;当售电企业投资储能设备时,消费者需要支付更高的电价,从而抑制电力需求量,进而抑制社会福利。(2)随着储能设备投资成本系数的增加,传统能源电力需求量会增加,但售电企业的利润会减少。(3)传统能源发电成本系数的增加有利于可再生能源电力发电上网。因此,本文分析储能设备投资模式对储能质量影响的问题,在一定程度上丰富了储能领域的研究。最后,讨论部分研究了消费者参与储能投资的情形,进一步论证上述结论。

关键词：新型电力系统可再生能源储能设备投资博弈论

可再生能源储能租赁模式对电力质量和电价决策的影响

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中国管理科学 2024年第1期32卷 309-318页

作者：陈威田永乐马永开白春光成都理工大学管理科学学院四川成都610059 电子科技大学经济与管理学院四川成都611731

针对租赁商租赁可再生能源储能设备给电力系统企业的问题,本文构建了由发电商和可再生能源储能设备租赁商共同作为领导者、售电商作为追随者的电力供应链模型,研究了发电商租赁储能设备、售电商租赁储能设备以及发电商和售电商共同分担... 详细信息

针对租赁商租赁可再生能源储能设备给电力系统企业的问题,本文构建了由发电商和可再生能源储能设备租赁商共同作为领导者、售电商作为追随者的电力供应链模型,研究了发电商租赁储能设备、售电商租赁储能设备以及发电商和售电商共同分担储能设备租赁成本(混合租赁模式)三种模式,分析了不同租赁模式对电力质量和电价决策的影响。通过比较不同模式的均衡解,得到如下主要结论:(1)相比于售电商租赁和混合租赁模式,发电商租赁模式能提供更高的电力质量和电价;(2)当消费者电力质量偏好系数较小(大)时,售电商租赁模式(发电商租赁模式)更有利于提高可再生能源的需求量;(3)电力质量和电价均随着单位储能价格的增加而增加,随着储能成本系数的增加而减少。

关键词：可再生能源储能电力质量租赁模式成本分担比例

Surface reconstruction,doping and vacancy engineering to improve the overall water splitting of CoP nanoarrays

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Nano Research 2023年第1期16卷 228-238页

作者： yongkai Sun Wenyuan Sun Lihong Chen Alan Meng Guicun Li lei Wang Jianfeng huang Aili Song Zhenhui Zhang Zhenjiang Li College of Electromechanical Engineering Qingdao University of Science and TechnologyQingdao 266061China College of materials Science and Engineering Qingdao University of Science and TechnologyQingdao 266042China Key Laboratory of Optic-electric Sensing and Analytical Chemistry for Life Science MOE College of Chemistry and Molecular EngineeringQingdao University of Science and TechnologyQingdao 266042China School of material Science and Engineering International S&T Cooperation Foundation of Shaanxi ProvinceXi’an Key Laboratory of Green Manufacture of Ceramic MaterialsShaanxi University of Science and TechnologyXi’an 710021China Qingdao huanghai University Qingdao 266000China

Development of a general regulatory strategy for efficient overall water splitting remains a challenging ***,a simple,costfairness,and general fluorination strategy is developed to realize surface reconstruction,heteroatom doping,and vacancies engineering over cobalt phosphide(CoP)for acquiring high-performance bifunctional ***,the surface of CoP nanoarrays(NAs)becomes rougher,meanwhile F doped into CoP lattice and creating amounts of P vacancies by fluorination,which caused the increase of active sites and regulation of charge distribution,resulting the excellent electrocatalyst performance of F-CoP NAs/copper foam(CF).The optimized F-CoP NAs/CF delivers a lower overpotential of only 35 mV at 10 ma·cm^(−2)for hydrogen evolution reaction(HER)and 231 mV at 50 ma·cm^(−2)for oxygen evolution reaction(OER),and the corresponding overall water splitting requires only 1.48 V cell voltage at 10 ma·cm^(−2),which are superior to the most state-of-theart reported *** work provides an innovative and feasible strategy to construct efficient electrocatalysts.

关键词： fluorination surface reconstruction F atom doping P vacancies overall water splitting

Pre-sodiation strategy for superior sodium storage batteries

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Chinese Journal of Chemical Engineering 2021年第11期34卷 261-268页

作者： yongkai Xu Haozheng Sun Cunshuang ma Jingjing Gai Yanhua Wan Weihua Chen Green Catalysis Center and College of ChemistryZhengzhou UniversityZhengzhou 450001China

The irreversible consumption of sodium in the initial several cycles greatly led to the attenuation of capacity,which caused the low initial coulombic efficiency(ICE)and obvious poor cycle *** can effectively improve the electrochemical performance by compensating the capacity loss in the initial ***,carbon-coated sodium-pretreated iron disulfide(NaFeS_(2)@C)has been synthesized through conventional chemical method and used in sodium metal battery as a cathode *** calculated density of states(DOS)of NaFeS2@C is higher,which implies enhanced electron mobility and improved cycle *** of the highly reversible conversion reaction and the compensation of irreversible capacity loss during the initial cycle,the Na/NaFeS_(2)@C battery achieves ultrahigh initial coulombic efficiency(96.7%)and remarkable capacity(751 ma·h·g^(-1) at 0.1 A·g^(-1)).In addition,highly reversible electrochemical reactions and ultra-thin NaF-rich solid electrolyte interphase(SEI)also benefit for the electrochemical performance,even at high current density of 100 A·g^(-1),it still exhibits a reversible capacity of 136 ma·h·g^(-1),and 343 ma·h·g^(-1) after 2500 cycles at 5.0 A·g^(-1).This work aims to bring up new insights to improve the ICE and stability of sodium metal batteries.

关键词： Pre-sodiation Solid electrolyte interphase Initial coulombic efficiency Sodium metal batteries Interface Electrochemistry

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基于人工智能的网络安全技术与应用

通信电源技术 2024年第8期41卷 176-178页

作者：祁志禹马有雯鲍永凯国网青海省电力公司信息通信公司青海西宁810000

现如今随着网络技术的不断发展,网络安全问题也日益凸显,传统的网络安全防护手段已经难以应对复杂多变的网络攻击。人工智能作为一种新兴的网络安全技术,正在被越来越多的企业和机构应用于网络安全防护。文章在人工智能背景下,分析网络... 详细信息

现如今随着网络技术的不断发展,网络安全问题也日益凸显,传统的网络安全防护手段已经难以应对复杂多变的网络攻击。人工智能作为一种新兴的网络安全技术,正在被越来越多的企业和机构应用于网络安全防护。文章在人工智能背景下,分析网络安全技术与应用,为网络安全领域的研究工作提供借鉴和参考。文章主要概述人工智能技术,介绍一些主流的基于人工智能的网络安全技术算法,并探讨基于人工智能的网络安全技术的应用,以期为网络安全领域的研究和实践提供参考。

关键词：人工智能网络安全技术入侵检测

Competition vs cooperation:renewable energy investment under cap-and-trade mechanisms

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Financial Innovation 2022年第1期8卷 2079-2106页

作者： Wei Chen Jing Chen yongkai ma College of management Science Chengdu University of TechnologyChengdu 610059China Rowe School of Business Dalhousie UniversityHalifaxNS B3H 4R2Canada School of management and Economics University of Electronic Science and Technology of ChinaChengdu 611731China

This paper explores the incentives of investment in renewable energy of two utility firms who compete or cooperate under either a cap-and-trade grandfathering mechanism(GM)or benchmarking mechanism(BM).We find that utility firms will invest in renewable energy more under BM than under GM,in both competitive and cooperative markets,and they will invest more in a competitive market than in a cooperative market,under either GM or ***,utility firms will produce more electricity and generate more total carbon emissions under BM than under *** profits of two firms,however,are higher in cooperative market than in competitive *** government will benefit from implementing a BM to encourage utility firms to invest in renewable energy in a competing market.

关键词： Cap-and-trade mechanism Renewable energy investment Competitive market Cooperative market

Steady-State Queue Length Analysis of a Batch Arrival Queue under N-Policy with Single Vacation and Setup Times

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Intelligent Information management 2010年第6期2卷 365-374页

作者： Zhong yu Mingwu Liu yongkai ma School of management and Economics University of Electronic Science and Technology of China School of management Chongqing Jiaotong University

This paper investigates the steady state property of queue length for a batch arrival queue under N-policy with single vacation and setup times. When the system becomes empty, the server is turned off at once and takes a single vacation of random length . When he returns, if the queue length reaches or exceeds threshold , the server is immediately turned on but is temporarily unavailable due to a random setup time before offering service. If not, the server stays in the system until the queue length at least being . We derive the system size distribution and confirm the stochastic decomposition property. We also derive the recursion expressions of queue length distribution and other performance measures. Finally, we present some numerical examples to show the analytical results obtained. Sensitivity analysis is also performed.

关键词： Queue Length Recursion Expressions N Policy Setup