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Magic hybrid structure as multifunctional electrocatalyst surpassing benchmark Pt/C enables practical hydrazine fuel cell integrated with energy-saving H_(2)production

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eScience 2022年第4期2卷 416-427页

作者： Ziyun Li Wentao Wang Qizhu Qian Yin Zhu Yafei Feng yangyang zhang Huaikun zhang Mingyu Cheng Genqiang zhang Hefei National Research Center for Physical Sciences at the Microscale CAS Key Laboratory of Materials for Energy ConversionDepartment of Materials Science and EngineeringUniversity of Science and Technology of ChinaHefeiAnhui230026China Guizhou Provincial Key Laboratory of Computational Nano-Material Science Guizhou Education UniversityGuiyangGuizhou550018China

A hybrid catalyst structure can provide abundant active sites and tailored electronic properties,but the major challenge lies in achieving delicate control over its composition and architecture to improve the catalytic activity toward different electrochemical reactions ***,we present the rational design of a magic hybrid structure with low Pt loading(5.90 wt%),composed of CoPt_(3)and CoPt nanoparticles supported on N-doped carbon(CoPt_(3)/CoPt⊂PLNC).Importantly,it shows superior multifunctional catalytic activity in alkaline conditions,requiring a low overpotential of 341 and 20 mV to achieve 10 mA cm^(−2)for the hydrazine oxidation reaction(HzOR)/hydrogen evolution reaction(HER),respectively,and it delivers a half-wave potential of 0.847 V for the oxygen reduction reaction(ORR).Theoretical calculations reveal that the metal-carbon hybrid modulates kinetic behavior and induces electron redistribution,achieving the energetic requirements for multiple *** demonstrate sustainable H_(2)production utilizing solely the CoPt_(3)/CoPt⊂PLNC catalyst,without external electric power input,suggesting its inspiring practical utility.

关键词： Electrocatalysis Hybrid structure Fuel cell Hydrazine oxidation H_(2)production

Efficient Routing Protection Algorithm in Large-Scale Networks

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Computers, Materials & Continua 2021年第2期66卷 1733-1744页

作者： Haijun Geng Han zhang yangyang zhang School of Software Engineering Shanxi UniversityTaiyuan030006China Institute of Big Data Science and Industry Shanxi UniversityTaiyuan030006China School of Cyber Space and Technology Beihang UniversityBeijing100191China College of Engineering Northeastern University Boston02115USA

With an increasing urgent demand for fast recovery routing mechanisms in large-scale networks,minimizing network disruption caused by network failure has become ***,a large number of relevant studies have shown that network failures occur on the Internet inevitably and *** current routing protocols deployed on the Internet adopt the reconvergence mechanism to cope with network *** the reconvergence process,the packets may be lost because of inconsistent routing information,which reduces the network’s availability greatly and affects the Internet service provider’s(ISP’s)service quality and reputation ***,improving network availability has become an urgent *** such,the Internet Engineering Task Force suggests the use of downstream path criterion(DC)to address all single-link failure ***,existing methods for implementing DC schemes are time consuming,require a large amount of router CPU resources,and may deteriorate router ***,the computation overhead introduced by existing DC schemes is significant,especially in large-scale ***,this study proposes an efficient intra-domain routing protection algorithm(ERPA)in large-scale *** analysis indicates that the time complexity of ERPA is less than that of constructing a shortest path *** results show that ERPA can reduce the computation overhead significantly compared with the existing algorithms while offering the same network availability as DC.

关键词： Large-scale network shortest path tree time complexity network failure real-time and mission-critical applications

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罗伊适应模式护理对脑卒中偏瘫患者的影响

中外医学研究 2024年第3期22卷 88-91页

作者：张洋洋厦门弘爱康复医院福建厦门361000

目的:研究罗伊适应模式护理对脑卒中偏瘫患者的影响。方法:选取2021年5月—2022年5月厦门弘爱康复医院收治的60例脑卒中偏瘫患者。根据随机数表法将其分为对照组(n=30)和观察组(n=30)。对照组给予常规护理,观察组在对照组基础上给予罗... 详细信息

目的:研究罗伊适应模式护理对脑卒中偏瘫患者的影响。方法:选取2021年5月—2022年5月厦门弘爱康复医院收治的60例脑卒中偏瘫患者。根据随机数表法将其分为对照组(n=30)和观察组(n=30)。对照组给予常规护理,观察组在对照组基础上给予罗伊适应模式护理。比较两组护理前后自我感受负担、应对方式、自护能力、自我效能感及并发症。结果:护理后,两组自我感受负担量表(SPBS)评分均降低,观察组SPBS评分低于对照组,差异有统计学意义(P<0.05)。护理后,两组积极应对评分升高,消极应对评分降低,观察组积极应对评分高于对照组,消极应对评分低于对照组,差异有统计学意义(P<0.05)。护理后,两组一般自我效能感量表(GSES)评分、自我护理能力测定量表(ESCA)评分均提高,观察组GSES评分、ESCA评分均高于对照组,差异有统计学意义(P<0.05)。观察组并发症发生率低于对照组,差异有统计学意义(P<0.05)。结论:罗伊适应模式护理可以有效提高脑卒中偏瘫患者的自护能力和自我效能感水平,减轻患者的自我感受负担,使患者积极应对康复治疗,降低患者并发症的发生率。

关键词：罗伊适应模式脑卒中偏瘫自护能力应对方式并发症

Influences of Environmental Motion Modes on the Efficiency of Ultrathin Flexible Piezoelec trie Energy Harvesters

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Acta Mechanica Solida Sinica 2019年第5期32卷 611-620页

作者： Chaofeng Lii yangyang zhang He zhang Zhicheng zhang Yisheng Chen College of Civil Engineering and Architecture Zhejiang University310058 HangzhouPeople Republic of China Key Laboratory of Soft Machines and Smart Devices of Zhejiang Province Zhejiang University310027 HangzhouPeople's Republic of China Soft Matter Research Center Zhejiang University310027 HangzhouPeople's Republic of China

Harvesting energy from ambient vibration sources with ultrathin flexible piezoelectric energy harvesters(PEHs)for battery-free electronics has received attention in recent ***,the excitation modes in the environment and human body motion are more complicated than the ideal harmonic modes employed in previous theoretical analyses,and their influence on the efficiency of PEHs has received little *** this study,these environmental excitation modes are classified into three types,i.e.,the triangular,sinusoidal,and square wave modes,with varied duty *** derived theoretically the output power of flexible PEHs under these excitation modes and establish a simple scaling law,in which the normalized output power depends only on two combined normalized parameters,i.e.,the intrinsic system parameter and the excitation *** reveal that the output power of PEHs changes dramatically for different excitation modes with varied duty ratios even when all the other parameters including excitation ampli tude,excitation frequency,elec trical parameter,and geometrical and material parameters of the PEHs are *** paper may provide a systematic understanding in the effect of exc计ation modes on the output power of flexible PEHs and promote the realization of energy harvesting from the complex environmental and human body motions.

关键词： Flexible piezoelec trie energy harves ter Environmental excitation modes Energy harvesting efficiency Theoretical predictions Scaling law

一株草莓根腐病病原菌的鉴定及生物学特性分析

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中国农学通报 2024年第13期40卷 113-120页

作者：王梦园杜延全闫加力汪丹张阳阳朱建强湖北省地质科学研究院武汉430034 湖北省硒生态环境效应检测中心武汉430034 中化农业(临沂)研发中心有限公司山东临沂276000 长江大学农学院湖北荆州434025

为明确山东省临沂市草莓根腐病病原菌的种类及其生物学特性,采用组织分离法获得菌株ZHG01,经形态学特征及rDNA-ITS序列分析对菌株进行鉴定,通过研究不同培养环境对菌丝生长的影响探究菌株的生物学特性。结果表明,菌株ZH-G01平皿菌落正... 详细信息

为明确山东省临沂市草莓根腐病病原菌的种类及其生物学特性,采用组织分离法获得菌株ZHG01,经形态学特征及rDNA-ITS序列分析对菌株进行鉴定,通过研究不同培养环境对菌丝生长的影响探究菌株的生物学特性。结果表明,菌株ZH-G01平皿菌落正面呈白色丝绒状,未产生色素;背面略微发黄,分生孢子5个细胞,纺锤状,中心3个褐色异色胞,顶部具有3~4根附属丝;菌株ZH-G01 ITS序列与GenBank中新棒状拟盘多毛孢(Neopestalotiopsis clavispora)相似性达99%以上,结合形态学与分子生物学特征将菌株ZH-G01鉴定为新棒状拟盘多毛孢(登录号为MN559410)。菌株ZH-G01伤根接种后30 d草莓植株地上部萎蔫,中柱中心和不定根呈褐色,根部病组织可再次分离菌株ZH-G01。该菌株在25℃、pH 4.0~10.0条件下,培养于PDA、胡萝卜琼脂培养基中长势较好;光照对菌丝生长无显著影响;最适碳源为可溶性淀粉,对木糖醇利用效果最差;最适氮源为酵母膏,对尿素的利用效果最差。

关键词：草莓根腐病新棒状拟盘多毛孢鉴定生物学特性培养环境菌丝生长

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基于卡尔曼滤波的X射线测厚仪噪声处理方法

自动化与仪器仪表 2024年第7期 27-31页

作者：颜希成刘海宁曾文胜张洋洋李发家济南大学机械工程学院济南250022 中国航发湖南动力机械研究所湖南株洲412007 日照广亚机电设备有限公司山东日照276800

X射线测厚仪在实际应用中受环境噪声、探测器噪声以及信号放大电路噪声等多重影响,导致初始电压存在较大波动问题。提出了一种基于卡尔曼滤波算法的X射线测厚仪噪声处理方法,采用网格搜索方法确定卡尔曼滤波的最优超参数。实验结果表明... 详细信息

X射线测厚仪在实际应用中受环境噪声、探测器噪声以及信号放大电路噪声等多重影响,导致初始电压存在较大波动问题。提出了一种基于卡尔曼滤波算法的X射线测厚仪噪声处理方法,采用网格搜索方法确定卡尔曼滤波的最优超参数。实验结果表明,相比传统的均值滤波和中值滤波,卡尔曼滤波算法能有效地去除测量信号中的噪声,显著地降低了测量误差,最大测量误差为0.08%。此方法对于X射线测厚仪的数据处理、提升测量精度以及实际生产中的应用具有重要意义。

关键词：噪声卡尔曼滤波 X射线测厚仪测量精度

PM_(2.5)and water-soluble inorganic ion concentrations decreased faster in urban than rural areas in China

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Journal of Environmental Sciences 2022年第12期34卷 83-91页

作者： yangyang zhang Aohan Tang Chen Wang Xin Ma Yunzhe Li Wen Xu Xiaoping Xia Aihua Zheng Wenqing Li Zengguo Fang Xiufen Zhao Xianlong Peng Yuping zhang Jian Han Lijuan zhang Jeffrey L.Collett Jr Xuejun Liu Beijing Key Laboratory of Farmland Soil Pollution Prevention and Remediation College of Resources and Environmental SciencesNational Academy of Agriculture Green DevelopmentChina Agricultural UniversityBeijing 100193China Analysis and Testing Center Beijing Normal UniversityBeijing 100875China Fujian Institute of Tobacco Agricultural Sciences Fuzhou 350003China College of Resources and Environment Qingdao Agricultural UniversityQingdao 266109China College of Resources and Environment Northeast Agricultural UniversityHaerbin 150030China College of Resources and Environment Hunan Provincial Key Laboratory of Farmland Pollution Control and Agricultural Resources UseHunan Agricultural UniversityChangsha 410128China College of Resources and Environment Hebei Agricultural UniversityBaoding 071001China Department of Atmospheric Science Colorado State UniversityFort CollinsCO 80523USA

We investigated variations of PM_(2.5)and water-soluble inorganic ions chemical characteristics at nine urban and rural sites in China using ground-based *** 2015 to 2019,mean PM_(2.5)concentration across all sites decreased by 41.9μg/m~3with a decline of 46%at urban sites and 28%at rural sites,where secondary inorganic aerosol(SIAs)contributed to 21%(urban sites)and 17%(rural sites)of the decreased PM_(2.5).SIAs concentrations underwent a decline at urban locations,while sulfate(SO_(4)^(2–)),nitrate(NO_(3)^(–)),and ammonium(NH_(4)^(+))decreased by 49.5%,31.3%and 31.6%,***,only SO_(4)^(2–)decreased at rural sites,NO_(3)^(–)increased by 21%and NH_(4)^(+)decreased *** changes contributed to an overall SIAs increase in *** molar ratios of NO_(3)^(–)to SO_(4)^(2–)and NH_(4)^(+)to SO_(4)^(2–)were observed at urban sites than rural sites,being highest in the heavily polluted *** molar ratios of NH_(3)/NH_xwere higher in 2019 than 2015 at both urban and rural sites,implying increasing NH_xremained as free NH_(3).Our observations indicated a slower transition from sulfate-driven to nitrate-driven aerosol pollution and less efficient control of NO_(x)than SO_(2)related aerosol formation in rural regions than urban ***,the common factor at urban and rural sites appears to be a combination of lower SO_(4)^(2–)levels and an increasing fraction of NO_(3)^(–)to PM_(2.5)under NH_(4)^(+)-rich *** findings imply that synchronous reduction in NO_(x)and NH_(3)emissions especially rural areas would be effective to mitigate NO_(3)^(–)-driven aerosol pollution.

关键词： PM_(2.5) Nitrate Ammonium Sulfate Air pollutant emission Pollution mitigation

Do tau-synaptic long-term depression interactions in the hippocampus play a pivotal role in the progression of Alzheimer’s disease?

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Neural Regeneration Research 2023年第6期18卷 1213-1219页

作者： Zhengtao Hu Tomas Ondrejcak Pengpeng Yu yangyang zhang Yin Yang Igor Klyubin Sean P.Kennelly Michael J.Rowan Neng-Wei Hu Department of Physiology and Neurobiology School of Basic Medical SciencesZhengzhou UniversityZhengzhouHenan ProvinceChina Department of Gerontology The First Affiliated Hospital of Wannan Medical CollegeWuhuAnhui ProvinceChina Department of Pharmacology&Therapeutics and Institute of Neuroscience Trinity CollegeDublinIreland Department of Age-Related Healthcare Tallaght University HospitalDublinIreland Department of Medical Gerontology Trinity CollegeDublinIreland

Cognitive decline in Alzheimer’s disease correlates with the extent of tau pathology,in particular tau hyperphosphorylation that initially appears in the transentorhinal and related regions of the brain including the *** evidence indicates that tau hyperphosphorylation caused by either amyloid-βor long-term depression,a form of synaptic weakening involved in learning and memory,share similar *** from our group and others demonstrate that long-term depression-inducing low-frequency stimulation triggers tau phosphorylation at different residues in the hippocampus under different experimental conditions including ***,certain forms of long-term depression at hippocampal glutamatergic synapses require endogenous tau,in particular,phosphorylation at residue *** the exact mechanisms of interaction between tau and long-term depression may help our understanding of the physiological and pathological functions of tau/tau(hyper)*** first summarize experimental evidence regarding tau-long-term depression interactions,followed by a discussion of possible mechanisms by which this interplay may influence the pathogenesis of Alzheimer’s ***,we conclude with some thoughts and perspectives on future research about these interactions.

关键词： aging Alzheimer’s disease amyloid-β Aβoligomers hippocampus long-term depression long-term potentiation LTD LTP metabotropic glutamate receptor N-methyl-D-aspartate receptor tau hyperphosphorylation tau phosphorylation tau

Oxidative Dehydrogenation of Propane over Supported Nickel Single-Atom Catalyst

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Chinese Journal of Chemistry 2024年第4期42卷 370-376页

作者： Qian zhang Xunzhu Jiang yangyang Li Yuanlong Tan Qike Jiang Xiaoyan Liu Botao Qiao CAS Key Laboratory of Science and Technology on Applied Catalysis Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalianLiaoning116023 China University of Chinese Academy of Sciences Beijing100049 China Dalian National Laboratory for Clean Energy Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalianLiaoning116023 China

Oxidative dehydrogenation of propane has been an ever-growing field for propylene production due to its exothermic properties,of which overoxidation is the major drawback,with CO and even CO_(2) as undesired *** the purpose of getting higher propylene selectivity as well as yield,herein,we report Ni single atoms supported on calcium aluminate as an efficient catalyst candidate for propane oxidative *** from higher valence states of Ni1 species,it shows 2—3 times as much propylene selectivity as that of Ni *** 14.2%C_(3)H_(6) yield with 47.3%propylene selectivity has been achieved on Ni single atom catalyst and a good stability during 20 h test can be obtained as well.

关键词： Oxidative dehydrogenation/Nickel Single-atom catalysts Propane Propylene selectivity