检索结果-南通市图书馆

Attack-resilient Distributed Control for Islanded Single-/three-phase Microgrids Based on Distributed Adaptive Observers

在线全文

学校读者我要写书评

暂无评论

Journal of Modern Power Systems and Clean Energy 2022年第1期10卷 109-119页

作者： Jianguo Zhou Yinliang Xu lun yang Hongbin Sun Tsinghua-Berkeley Shenzhen Institute(TBSI) Tsinghua Shenzhen International Graduate School(TsinghuaSIGS)Tsinghua UniversityShenzhen 518055China Department of Electrical Engineering State Key Laboratory of Power SystemsTsinghua UniversityBeijing 100084China

This paper investigates the power sharing and voltage regulation issues of islanded single-/three-phase microgrids(S/T-MGs)where both sources and loads are unbalanced and the presence of adversarial cyber-attacks against sensors of distributed generator(DG)units is considered.Firstly,each DG unit is modeled as a heterogeneous linear dynamic agent with disturbances caused by sources and loads,then the problem is formulated as a distributed containment control problem.After that,to guarantee satisfactory power sharing and voltage control performance asymptotically achieved for the S/T-MGs,an attack-resilient distributed secondary control approach is developed by designing a distributed adaptive observer.With this approach,the effect of the cyber-attacks can be neutralized to ensure system stability and preserve bounded voltage synchronization.Simulation results are presented to demonstrate the effectiveness of the proposed control approach.

关键词： Single-/three-phase microgrid cyber-attack resilient distributed control distributed observer power sharing

Hierarchical Interconnected NiMoN with Large Specific Surface Area and High Mechanical Strength for Efficient and Stable Alkaline Water/Seawater Hydrogen Evolution

在线全文

学校读者我要写书评

暂无评论

Nano-Micro Letters 2023年第9期15卷 520-535页

作者： Minghui Ning Yu Wang Libo Wu lun yang Zhaoyang Chen Shaowei Song Yan Yao Jiming Bao Shuo Chen Zhifeng Ren Department of Physics and Texas Center for Superconductivity at the University of Houston(TcSUH) University of HoustonHoustonTX 77204USA Cullen College of Engineering and TcSUH University of HoustonHoustonTX 77204USA School of Materials Science and Engineering Hubei Normal UniversityHuangshi 435002HubeiPeople’s Republic of China Department of Electrical and Computer Engineering and TcSUH University of HoustonHoustonTX 77204USA

NiMo-based nanostructures are among the most active hydrogen evolution reaction(HER)catalysts under an alkaline environment due to their strong water dissociation ability.However,these nanostructures are vulnerable to the destructive effects of H_(2) production,especially at industry-standard current densities.Therefore,developing a strategy to improve their mechanical strength while maintaining or even further increasing the activity of these nanocatalysts is of great interest to both the research and industrial communities.Here,a hierarchical interconnected NiMoN(HW-NiMoN-2h)with a nanorod-nanowire morphology was synthesized based on a rational combination of hydrothermal and water bath processes.HW-NiMoN-2h is found to exhibit excellent HER activity due to the accomodation of abundant active sites on its hierarchical morphology,in which nanowires con-nect free-standing nanorods,concurrently strengthening its structural stability to withstand H_(2) production at 1 A cm^(−2).Seawater is an attractive feedstock for water electrolysis since H_(2) generation and water desalination can be addressed simultaneously in a single process.The HER performance of HW-NiMoN-2h in alkaline seawater suggests that the presence of Na+ions interferes with the reation kinetics,thus lowering its activity slightly.However,benefiting from its hierarchical and interconnected characteristics,HW-NiMoN-2h is found to deliver outstanding HER activity of 1 A cm^(−2) at 130 mV overpotential and to exhibit excellent stability at 1 A cm^(−2) over 70 h in 1 M KOH seawater.

关键词： Hydrogen evolution reaction(HER) Nanoarchitecture NiMo catalysts Direct seawater electrolysis Nanostructural stability

One-step,in situ formation of WN-W_(2)C heterojunctions implanted on N doped carbon nanorods as efficient oxygen reduction catalyst for metal-air battery

在线全文

学校读者我要写书评

暂无评论

Nano Research 2023年第7期16卷 8773-8781页

作者： Yue Du Wenxue Chen Lina Zhou Rui Hu Shizhu Wang Xueqing Li Yunlong Xie lun yang Yisi Liu Zhenhui Liu Institute for Advanced Materials Hubei Normal UniversityHuangshi 435002China College of Material Science and Engineering Jiangsu Key Laboratory of Materials and Technology for Energy ConversionNanjing University of Aeronautics and AstronauticsNanjing 210016China

Transition metal nitrides and carbides have attracted intensive attentions in metal-air battery application due to their metallic electron transport behavior and high chemical stability toward the oxygen reduction reaction(ORR).Herein,the polyoxometalate@polyaniline composite derived WN-W_(2)C heterostructured composite(WN-W_(2)C@pDC)has been fabricated through an in situ nitriding-carbonization strategy,with WN-W_(2)C nanoparticles implanted on N doped carbon nanorods.Asfabricated WN-W_(2)C@pDC demonstrates prominent electrocatalytic performance towards ORR and excellent cycling stability in metal-air battery,which possesses positive half-wave potential and large diffusion limiting current density(0.81 V and 5.8 mA·cm^(-2)).Moreover,it demonstrates high peak power density of 157.4 mW·cm^(-2)as Al-air primary cathode and excellent stability at the discharge-charge test(>500 h)of Zn-air secondary battery.The excellent activity and durability of WNW_(2)C@pDC catalyst should be attributed to the combined effect of intimate WN-W_(2)C heterointerfaces,unique embedded nanoparticles structure,and excellent electrical media of N doped carbon,confirmed by a series of contrast experiments.

关键词： WN-W_(2)C heterojunctions polyoxometalate@polyaniline composite oxygen reduction reaction metal-air battery

有机硅基RAFT试剂制备聚醚改性有机硅消泡剂

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

精细化工 2024年第5期41卷 1043-1049页

作者：刘运钰杨伦季永新南京林业大学化学工程学院江苏南京210037 南通市晗泰化工有限公司江苏南通226000

以八甲基环四硅氧烷和巯丙基甲基二甲氧基硅烷为原料,合成了巯基硅油;再以巯基硅油、CS_(2)和2-溴代异丁酸甲酯为原料,合成了有机硅基可逆加成-断裂链转移(RAFT)试剂(RAFT-SSO);RAFT-SSO与甲基封端的烯丙基聚氧乙烯醚(EO)、甲基封端的... 详细信息

以八甲基环四硅氧烷和巯丙基甲基二甲氧基硅烷为原料,合成了巯基硅油;再以巯基硅油、CS_(2)和2-溴代异丁酸甲酯为原料,合成了有机硅基可逆加成-断裂链转移(RAFT)试剂(RAFT-SSO);RAFT-SSO与甲基封端的烯丙基聚氧乙烯醚(EO)、甲基封端的烯丙基聚氧丙烯醚(PO)采用RAFT聚合反应合成了聚醚改性有机硅消泡剂(RS-EOPO)。采用FTIR、^(1)HNMR,GPC对RS-EOPO进行了结构表征,对其消泡、抑泡、相容性进行了测试,并将RS-EOPO与进口消泡剂性能进行对比。RS-EOPO最佳合成工艺条件为RAFT-SSO相对分子质量为2000、m(EO)∶m(PO)=1∶4、m(RAFT-SSO)∶m〔醚(EO和PO)〕=1∶1.15、反应温度75℃、反应时间8 h、引发剂用量为EO(3.45 g)和PO总质量的2%。在上述条件下,RS-EOPO收率为91.8%。

关键词：消泡剂有机硅基RAFT试剂改性硅油烯丙基聚醚表面活性剂

同方期刊数据库博看期刊评论

在线全文

学校读者我要写书评

暂无评论

掘进机随机振动信号同步采集误差补偿方法

机械设计与制造 2024年第1期395卷 274-279页

作者：蔡玉杰杨伦刘涛郑州西亚斯学院电信与智能制造学院河南郑州451100 中国民航大学电子信息与自动化学院天津300300

掘进机工作环境较为恶劣,振动信号中掺杂大量干扰信号,信号采集过程中存在随机迟滞现象,导致采集的掘进机振动信号误差较大,为此提出一种掘进机随机振动信号同步采集误差补偿方法。将掘进机看作多自由度系统,建立设备的运动学模型;结合... 详细信息

掘进机工作环境较为恶劣,振动信号中掺杂大量干扰信号,信号采集过程中存在随机迟滞现象,导致采集的掘进机振动信号误差较大,为此提出一种掘进机随机振动信号同步采集误差补偿方法。将掘进机看作多自由度系统,建立设备的运动学模型;结合掘进机运动学特征,利用虚拟激励法合理构造随机激励函数;在建立的随机激励下,选择传感器类型、安装方式和参数,根据正弦稳态校准方法需求设计校准系统,提高传感器敏感性,预测传感器输出延时,计算每次测量的同步误差和误差补偿值,经过补偿,确保多传感器实现振动信号误差的同步动态补偿。实验结果证明,所提方法减少了随机迟滞,采集到的信号波形与实际波形相符,有效实现了对采集信号的误差补偿。

关键词：掘进机随机振动信号多传感器随机激励函数同步误差补偿

Characterization of a novel missense mutation on murine Pax3 through ENU mutagenesis

在线全文

学校读者我要写书评

暂无评论

Journal of Genetics and Genomics 2011年第8期38卷 333-339页

作者： Yue Xiao Lingling Zhang Kuanjun He Xiang Gao lun yang Lin He Gang Ma Xizhi Guo Bio-X Center Key Laboratory for the Genetics of Developmental and Neuropsychiatric Disorders Shanghai Jiao Tong University Shanghai 200240 China Medical School of Nanjing University Model Animal Research Center Nanjing 210093 China These authors contr-ibuted equally to this paper.

N-ethyl-N-nitrosourea （ENU） mutagenesis has led to the elucidation of several regulator genes for melanocyte and skin development. Here we characterized a mutant from ENU mutagenesis with similar phenotype as that of Splotch mutant, including exencephaly, spina bifida and abnormal limbs in homozygotes as well as white belly spotting and occasionally loop-tail in heterozygotes. This novel mutant was named as SpxG. Through genome-wide linkage analysis in backcross progenies with microsatellite markers, the SpxG was confined to a region between DIMIT415 and DIMIT7 on chromosome 1, where notable Pax3 gene was located. Direct sequencing revealed that SpxG carried a nucleotide A894G missense transition in exon 6 of Pax3 gene that resulted in Asn to Asp substitution at amino acid 269 within the highly-conserved homeodomain （HD） DNA recognition module, which was the first point mutation found in this domain in mice. This N269D mutation impaired the transactivation capacity of Pax3 protein, but exerted no effect on Pax3 protein translation. The characterization of the new mutation expanded our understanding the transactivation and DNA-binding structure of Pax3 protein.

关键词： White spotting Neural tube defect ENU Pax3 Transactivation

Boosting pH-Universal Hydrogen Evolution of Molybdenum Disulfide Particles by Interfacial Engineering

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Chemistry 2021年第2期39卷 288-294页

作者： Liling Liao lun yang Gang Zhao Haiqing Zhou Fengming Cai Yi Li Xiuzhang Wang Fang Yu Synergetic Innovation Center for Quantum Effects and Applications Key Laboratory for Matter Microstructure and Function of Hunan ProvinceKey Laboratory of Low-Dimensional Quantum Structures and Quantum Control of Ministry of EducationSchool of Physics and ElectronicsHunan Normal UniversityChangshaHunan410081 China Institute for Advanced Materials Hubei Normal UniversityHuangshiHubei435002 China Nanotechnology&Application Center Ningbo Fengcheng Advanced Energy Materials Research InstituteNingboZhejiang315500 China

The design of high-efficiency non-noble and earth-abundant electrocatalysts for hydrogen evolution reaction(HER)is highly paramount for water splitting and renewable energy systems.Molybdenum disulfide(MoS_(2))with abundant edge sites can be utilized as a promising alternative,but its catalytic activity is greatly related to the pH values,especially in an alkaline environment due to the extremely high energy barriers for water adsorption and dissociation steps.Here we report an exceptionally efficient and stable electrocatalyst to improve the sluggish HER process of layered MoS_(2)particles in different pH electrolytes,especially in base.The electrocatalyst is constructed by in situ growing selenium-doped MoS_(2)(Se-MoS_(2))nanoparticles on three-dimensional cobalt nickel diselenide(mCo_(0.2)Ni_(0.8)Se_(2))nanostructured arrays.Due to the large number of active edge sites of Se-MoS_(2)particles exposed at the surface,robust electrical conductivity and large surface area of mCo_(0.2)Ni_(0.8)Se_(2)support,and strong interfacial interactions between Se-MoS_(2)and mCo_(0.2)Ni_(0.8)Se_(2),this hybrid catalyst shows very outstanding catalytic HER properties featured by low overpotentials of 30 and 122 mV at 10 and 100 mA/cm^(2)with good operational stability in base,respectively,which outperforms most of inexpensive catalysts consisting of layered MoS_(2),transition metal selenides and sulfides,and it performs as well as noble Pt catalysts.Meanwhile,this electrocatalyst is also very active in neutral and acidic electrolytes,requiring low overpotentials of 93 and 94 mV at 10 mA/cm^(2),respectively,demonstrating its superb pH universality as a HER electrocatalyst with excellent catalytic durability.This study provides a straightforward strategy to construct an efficient non-noble electrocatalyst for driving the HER kinetics in different electrolytes.

关键词： Hydrogen evolution reaction Molybdenum disulfide pH-universal Water splitting Heterogeneous catalysis

A Machine Learning Study of Polymer-Solvent Interactions

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Journal of Polymer Science 2022年第7期40卷 834-842页

作者： Ting-Li Liu lun-yang Liu Fang Ding Yun-Qi Li State Key Laboratory of Polymer Physics and Chemistry Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun130022China School of Applied Chemistry and Engineering University of Science and Technology of ChinaHefei230026China

Polymer-solvent interaction is a fundamentally important concept routinely described by the Flory-Huggins interaction(χ),Hildebrand solubility(Δδ)and the relative energy difference(RED)determined from Hansen solubility in experimental,theoretical and simulation studies.Here we performed a machine learning study based on a comprehensive and representative dataset covering the interaction pairs from 81polymers and 1221 solvents.The regression models provide the coefficients of determination in the range of 0.86-0.94 and the classification models deliver the area under the receiver operating characteristic curve(AUCs)better than 0.93.These models were integrated into a newly developed software polySML-PSI.Important features including Log P,molar volume and dipole are identified,and their non-linear,nonmonotonic contributions to polymer-solvent interactions are presented.The widely known“like-dissolve-like”rule and two broadly used empirical equations to estimateχas a function of temperature or Hansen solubility are also evaluated,and the polymer-specified constants are presented.This study provides a quantitative reference and a tool to understand and utilize the concept of polymer-solvent interactions.

关键词： Flory-Huggins interaction Hildebrand solubility Hansen solubility Machine learning Prediction

基于第二课堂的小学教育专业师范生自主成长探索与实践

在线全文

学校读者我要写书评

暂无评论

保定学院学报 2024年第1期37卷 111-115,121页

作者：杨伦马立志王若宁保定学院教师教育学院河北保定071000

地方院校小学教育专业开展丰富的第二课堂活动具有重要意义,通过成立“虚拟小学”,构建“虚拟小学”育师课程、活动、管理体系,提高师范生的教学实践技能和管理能力,引导其形成正确的教师职业认知、职业信念。小学教育专业第二课堂的育... 详细信息

地方院校小学教育专业开展丰富的第二课堂活动具有重要意义,通过成立“虚拟小学”,构建“虚拟小学”育师课程、活动、管理体系,提高师范生的教学实践技能和管理能力,引导其形成正确的教师职业认知、职业信念。小学教育专业第二课堂的育人目标要符合专业培养要求,学习内容要注重推进师范生个性化学习,同时,为提高师范生参与度,要实行第二课堂课程学分制。

关键词：虚拟小学师范生自主成长