检索结果-南通市图书馆

Acta Mechanica Sinica 2009年第4期25卷 463-469页

作者： Jianhong Kang mingyu xu institute of applied mathematics,school of mathematics and system science,shandong university, 2.0100 jinan, china institute of applied mathematics School of Mathematics and System Science Shandong University 250100 Jinan China

In this paper, the generalized Oldroyd-B with fractional calculus approach is used. An exact solution in terms of Fox-H function for flow past an accelerated horizontal plate in a rotating fluid is obtained by using discrete Laplace transform method. A comparison among the influence of various parameters in the Oldroyd-B model and the angular velocity of the fluid on the velocity profiles is made through numerical method in graphic form.

关键词： Generalized Oldroyd-B model Rotating fluid Accelerated plate Exact solution

Intermediate processes and critical phenomena: Theory, method and progress of fractional operators and their applications to modern mechanics

在线全文

学校读者我要写书评

暂无评论

science china(Physics,Mechanics & Astronomy) 2006年第3期49卷 257-272页

作者： xu mingyu1 & tan wenchang2.1. institute of applied mathematics, school of math & system science, shandong university, jinan 2.0100, china 2. State Key Laboratory of Turbulence and Complex systems & Department of Mechanics and Engineering science, Peking university, Beijing 100871, china 1. institute of applied mathematics School of Math & System Science Shandong University Jinan 250100 China 2. State Key Laboratory of Turbulence and Complex systems & Department of Mechanics and Engineering science Peking University Beijing 100871 China

From point of view of physics, especially of mechanics, we briefly introduce fractional operators (with emphasis on fractional calculus and fractional differential equa- tions) used for describing intermediate processes and critical phenomena in physics and mechanics, their progress in theory and methods and their applications to modern me- chanics. Some authors’ researches in this area in recent years are included. Finally, prospects and evaluation for this subject are made.

关键词： fractional operators,intermediate processes,critical phenomena,modern mechanics

Piezoelectric film promotes skin wound healing with enhanced collagen deposition and vessels regeneration via upregulation of PI3K/AKT

在线全文

学校读者我要写书评

暂无评论

Nano Research 2024年第8期17卷 7461-7478页

作者： Qi xu Wufei Dai Peizhe Li Qinglin Li Zhen Gao Xiaoli Wu Wei Liu Wenbo Wang Department of Plastic and Reconstructive Surgery Shanghai Key Laboratory of Tissue EngineeringShanghai Ninth People’s HospitalShanghai Jiao Tong University School of MedicineShanghai 200011China Research institute of Plastic Surgery Shandong Second Medical UniversityWeifang 261000China Department of Surgery Air Force Medical CenterPLABeijing 100142China

Skin wounds are common in accidental injuries,and the intricacies of wound repair are closely linked to endogenous electric *** stimulation plays a pivotal role in the restorative processes of skin injuries,encompassing collagen deposition,angiogenesis,inflammation,and *** electrical stimulation therapy replicates and enhances the effects of endogenous wound electric fields by applying an external electric field to the wound site,thereby promoting skin wound *** this study,we developed a self-powered repetitive mechanical impacts-electrical stimulation(RMI-ES)system utilizing a BaTiO_(3)/polydimethylsiloxane(PDMS)piezoelectric composite *** to conventional electrical stimulation devices,the fabricated piezoelectric composite film efficiently harvests energy from the pressure applied by the stimulation device and the tensile force occurring during natural rat *** results demonstrated that piezoelectric stimulation generated by the composite membrane expedited the cell cycle,promoting fibroblast ***,piezoelectric stimulation induced favorable changes in fibroblast gene expression,including increased expression of transforming growth factor-β1(TGF-β1),connective tissue growth factor(CTGF),collagen 1,collagen 3,vascular endothelial growth factor(VEGF),and alpha-smooth muscle actin(α-SMA),while reducing interleukin-6(IL-6)*** analysis revealed that piezoelectric stimulation may induce fibroblast migration,proliferation,and collagen expression by influencing PI3K/AKT serine/threonine kinase(AKT)*** confirmation through the addition of the PI3K inhibitor LY294002 validated that piezoelectric stimulation can regulate the repair process after skin injury through the ***,in vivo results demonstrated that the electric field at the wound site effectively promoted wound healing,reduced inflammation,and stimulated collagen deposition and ne

关键词： BaTiO3/polydimethylsiloxane(PDMS)nano-composite membrane piezoelectrical stimulation skin wound healing collagen deposition PI3K/AKT serine/threonine kinase(AKT)signaling pathway

Reversible solid-liquid conversion enabled by self-capture effect for stable non-flow zinc-bromine batteries

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

Green Energy & Environment 2024年第6期9卷 1035-1044页

作者： Xixi Zhang Xiaoke Wang Guangmeng Qu Tairan Wang Xiliang Zhao Jun Fan Cuiping Han Xijin xu Chunyi Zhi Hongfei Li school of Physics and Technology University of JinanShandong250022China Songshan Lake Materials Laboratory DongguanGuangdong523808China Department of Materials science and Engineering City University of Hong Kong83 Tat Chee AvenueHong KongChina Faculty of Materials science and Engineering and Low Dimensional Energy Materials Research Center Shenzhen Institute of Advanced TechnologyChinese Academy of SciencesShenzhenGuangdong518055China school of system Design and Intelligent Manufacturing Southern University of Science and TechnologyShenzhenGuangdong518055China

Non-flow aqueous zinc-bromine batteries without auxiliary components(e.g.,pumps,pipes,storage tanks)and ion-selective membranes represent a cost-effective and promising technology for large-scale energy ***,they generally suffer from serious diffusion and shuttle of polybromide(Br^(-),Br^(3-))due to the weak physical adsorption between soluble polybromide and host carbon materials,which results in low energy efficiency and poor cycling ***,we develop a novel self-capture organic bromine material(1,10-bis[3-(trimethylammonio)propyl]-4,4'-bipyridinium bromine,NVBr4)to successfully realize reversible solid complexation of bromide components for stable non-flow zinc-bromine battery *** quaternary ammonium groups(NV^(4+)ions)can effectively capture the soluble polybromide species based on strong chemical interaction and realize reversible solid complexation confined within the porous electrodes,which transforms the conventional“liquid-liquid”conversion of soluble bromide components into“liquid-solid”model and effectively suppresses the shuttle ***,the developed non-flow zinc-bromide battery provides an outstanding voltage platform at 1.7 V with a notable specific capacity of 325 mAh g^(-1)NVBr4(1 A g^(-1)),excellent rate capability(200 mAh g^(-1)NVBr4 at 20 A g^(-1)),outstanding energy density of 469.6 Wh kg^(-1)and super-stable cycle life(20,000 cycles with 100%Coulombic efficiency),which outperforms most of reported zinc-halogen *** mechanism analysis and DFT calculations demonstrate that the chemical interaction of quaternary ammonium groups and bromide species is the main reason for suppressing the shuttle *** developed strategy can be extended to other halogen batteries to obtain stable charge storage.

关键词： Solid-liquid conversion Self-capture Non-ﬂow zinc-bromine batteries Quaternary ammonium

SOLUTION OF system OF FRACTIONAL DIFFERENTIAL EQUATIONS BY ADOMIAN DECOMPOSITION METHOD

在线全文

学校读者我要写书评

暂无评论

applied mathematics(A Journal of Chinese Universities) 2007年第1期22卷 7-12页

作者： Duan Junsheng An Jianye xu mingyu2 College of science Tianjin University of Commerce Tianjin 300134 China institute of mathematics and systematical science Shandong University Jinan 250100 China

The aim of this paper is to apply the relatively new Adomian decomposition method to solving the system of linear fractional, in the sense of Riemann-Liouville and Caputo respectively, differential equations. The solutions are expressed in terms of Mittag-Leffier functions of matric argument. The Adomian decomposition method is straightforward, applicable for broader problems and avoids the difficulties in applying integral transforms. As the order is 1, the result here is simplified to that of first order differential equation.

关键词： rfractional calculus Adomian decomposition method Mittag-Lemer function.

Water consumption and biodiversity:Responses to global emergency events

在线全文

学校读者我要写书评

暂无评论

science Bulletin 2024年第16期69卷 2632-2646页

作者： Dandan Zhao Junguo Liu Laixiang Sun Klaus Hubacek Stephan Pfister Kuishuang Feng Heran Zheng xu Peng Daoping Wang Hong Yang Lei Shen Fei Lun xu Zhao Bin Chen Marko Keskinen Shaohui Zhang Jialiang Cai Olli Varis Water&Development Research Group Department of Built EnvironmentAalto UniversityEspoo 15200Finland school of Water Conservancy North China University of Water Resources and Electric PowerZhengzhou 450046China school of Environmental science and Engineering Southern University of Science and TechnologyShenzhen 518055China Department of Geographical sciences University of MarylandCollege Park 20742USA school of Finance and Management SOASUniversity of LondonLondon WC1H0XGUK Integrated Research on Energy Environment and SocietyEnergy and Sustainability Research Institute GroningenUniversity of GroningenGroningen 9747AGthe Netherlands ETH Zurich Institute of Environmental EngineeringZurich 8093Switzerland The Bartlett school of Sustainable Construction University College LondonLondon WC1E6BTUK school of Business Jiangnan UniversityWuxi 214122China Department of Computer science and Technology University of CambridgeCambridge CB21TNUK w2e Environmental Consulting GmbH Duebendorf 8600Switzerland Key Laboratory for Resource Use and Environmental Remediation Institute of Geographic Sciences and Natural Resources ResearchChinese Academy of SciencesBeijing 100101China College of Land science and Technology China Agricultural UniversityBeijing 100083China institute of Blue and Green Development Shandong UniversityWeihai 264209China Fudan Tyndall Center Department of Environmental Science and EngineeringFudan UniversityShanghai 200438China school of Economics and Management Beihang UniversityBeijing 100191China International institute for applied systems Analysis Laxenburg A-2361Austria

Given that it was a once-in-a-century emergency event,the confinement measures related to the coronavirus disease 2.19(COVID-19)pandemic caused diverse disruptions and changes in life and work *** changes significantly affected water consumption both during and after the pandemic,with direct and indirect consequences on ***,there has been a lack of holistic evaluation of these ***,we propose a novel framework to study the impacts of this unique global emergency event by embedding an environmentally extended supply-constrained global multi-regional input-output model(MRIO)into the drivers-pressure-state-impact-response(DPSIR)*** framework allowed us to develop scenarios related to COVID-19 confinement measures to quantify country-sector-specific changes in freshwater consumption and the associated changes in biodiversity for the period of *** results suggest progressively diminishing impacts due to the implementation of COVID-19 vaccines and the socio-economic system’s self-adjustment to the new *** 2020,the confinement measures were estimated to decrease global water consumption by about 5.7% on average across all scenarios when compared with the baseline level with no confinement ***,such a decrease is estimated to lead to a reduction of around 5% in the related pressure on *** the interdependencies and interactions across global supply chains,even those countries and sectors that were not directly affected by the COVID-19 shocks experienced significant impacts:Our results indicate that the supply chain propagations contributed to 79% of the total estimated decrease in water consumption and 84%of the reduction in biodiversity loss on *** study demonstrates that the MRIO-enhanced DSPIR framework can help quantify resource pressures and the resultant environmental impacts across supply chains when facing a global emergency ***,we recommend the development o

关键词： Global emergency events Water-biodiversity causal effect COVID-19 Biodiversity MRIO-enhanced DPSIR framework Supply-chain network High-resolution water consumption dataset Supply-constrained multi-regional input-output(mixed MRIO)model

铁-三联吡啶配合物活化高碘酸盐体系构建及其对染色废水的催化降解机制

在线全文

学校读者我要写书评

暂无评论

纺织学报 2024年第6期45卷 105-112页

作者：武守营黄启超张开封张琳萍钟毅徐红毛志平东华大学化学与化工学院上海201620 东华大学生态纺织教育部重点实验室上海201620 山东中康国创先进印染技术研究院有限公司国家先进印染技术创新中心山东泰安271000

为开发新型、高效的染色废水处理方法,通过铁-三联吡啶(Fe^(Ⅲ)(tpy)C_(l3))配合物活化高碘酸盐(PI)构建了Fe^(Ⅲ)(tpy)C_(l3)/PI催化氧化体系。在此基础上,采用酸性红1(AR1)作为染色废水模型污染物测试了该体系的催化降解性能,并通过... 详细信息

为开发新型、高效的染色废水处理方法,通过铁-三联吡啶(Fe^(Ⅲ)(tpy)C_(l3))配合物活化高碘酸盐(PI)构建了Fe^(Ⅲ)(tpy)C_(l3)/PI催化氧化体系。在此基础上,采用酸性红1(AR1)作为染色废水模型污染物测试了该体系的催化降解性能,并通过捕获和探针实验研究了Fe^(Ⅲ)(tpy)C_(l3)配合物活化PI降解酸性红1的机制。结果表明:Fe^(Ⅲ)(tpy)C_(l3)配合物能够高效活化PI实现酸性红1的快速降解,15 min内对AR1的去除率高达98%;Fe^(Ⅲ)(tpy)C_(l3)/PI体系对酸性红1的降解符合伪一级动力学模型,同时酸性红1的降解速率常数随Fe^(Ⅲ)(tpy)C_(l3)配合物和PI浓度的增加而呈线性增加;在Fe^(Ⅲ)(tpy)C_(l3)/PI体系中包含超氧自由基、单线态氧以及高价铁,这些活性物质共同促进酸性红1的降解;该体系不仅对多种有机物的降解表现出普适性,同时催化降解过程不受溶液pH值以及常见无机盐离子的干扰。

关键词：配合物高碘酸盐染色废水降解催化机制废水处理铁-三联吡啶

Molecular Characterization and Expression and DNA Methylation Analyses of a Galectin-Related Protein Gene from Cynoglossus semilaevis

在线全文

学校读者我要写书评

暂无评论

Journal of Ocean university of china 2018年第5期17卷 1189-1196页

作者： XIU Yunji GAN Tian xu Wenteng SHAO Changwei CHEN Songlin Laboratory for Marine Fisheries science and Food Production Processes Qingdao National Laboratory for Marine Science and TechnologyYellow Sea Fisheries Research InstituteChinese Academy of Fishery Sciences Key Laboratory of Sustainable Development of Marine Fisheries Ministry of Agriculture Marine science and Engineering College Qingdao Agricultural University College of Fisheries and Life science Shanghai Ocean University

Galectins, a family of β-galactoside-binding proteins, participate in both innate immunity and adaptive immunity. This study identified one novel galectin-related protein from half-smooth tongue sole Cynoglossus semilaevis, which was designated as CsGRP. The full-length cDNA of its encoding gene was 785 bp in length with a 528 bp open reading frame encoding a putative protein of 176 amino acids. The deduced CsGRP contained a putative 131-aa galactoside-binding lectin domain and 3 critical residues responsible for carbohydrate binding （R93, W109 and R114）. Genomic structural analysis revealed that CsGRP consisted of five exons and four intzons. CsGRP showed 68% similarity with Poecilia latipinna GRP and 67% similarity wih Stegastes partitus GRP. CsGRP showed the highest expression level in liver, although its expression was detected in all tested tissues. When challenged with Vibrio harveyi, the expression of CsGRP was significantly down-regulated in liver （P〈 0.05）. In addition, we found that in spleen and kidney of C. semilaevis, the CpG island of CsGRP showed significantly higher （P 〈 0.05） methylation level in disease-resistant family of C. semilaevis （DR-Cs） than in disease-susceptible ones （DS-Cs）. Our results suggested that CsGRP may play important roles in the immune response of C. semilaevis. Moreover, DNA methylation patterns provided valuable data for understanding the relationship between epigenetic regulation and immunity, which would assist the animal genetic research and improve the animal breeding in the future.

关键词： Cynoglossus semilaevis galectin-related protein expression pattern DNA methylation immune response

微电网生物质发电燃气净化与并离网智能控制研究

在线全文

学校读者我要写书评

暂无评论

应用化工 2024年第3期53卷 608-612页

作者：赵文青杨金明侯绪杰殷海红解永辉都柏林大学计算机科学学院爱尔兰都柏林D04 K2N0 杭州市化工研究院浙江杭州310014 山东秋水化学科技有限公司山东潍坊262711 潍坊职业学院机电工程学院山东潍坊261000 山东赛马力发电设备有限公司山东潍坊261000

针对生物质中燃气含有H_(2)S、HCl等腐蚀性气体,容易腐蚀内燃发电机及管道系统,采用羟基氧化铁高硫容脱硫技术与复合层长寿命脱氯体系对生物质燃气进行净化;同时针对生物质微电网并离网切换过程中存在较大幅度功率不平衡导致的频率越限... 详细信息

针对生物质中燃气含有H_(2)S、HCl等腐蚀性气体,容易腐蚀内燃发电机及管道系统,采用羟基氧化铁高硫容脱硫技术与复合层长寿命脱氯体系对生物质燃气进行净化;同时针对生物质微电网并离网切换过程中存在较大幅度功率不平衡导致的频率越限问题,提出了有功功率快速平衡智能响应策略。经研究,NH_(4)HCO_(3)制备的羟基氧化铁硫容可达到50%以上,硫化氢出口浓度1 mg/L,经过复合床层脱氯,出口HCl<0.5 mg/L时,使用寿命达到30 d以上。同时,通过智能化分布式电源功率调节与负荷精确控制,实现孤岛发生时微电网内有功功率的快速平衡,使微电网内的频率波动控制在5%以内。

关键词：生物质沼气脱氯脱硫硫容微电网

CO_2 methanation over TiO_2–Al_2O_3 binary oxides supported Ru catalysts

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Chemical Engineering 2016年第1期24卷 140-145页

作者： Jinghua xu Qingquan Lin Xiong Su Hongmin Duan Haoran Geng Yanqiang Huang school of Materials science and Engineering Shandong University State Key Laboratory of Catalysis Dalian Institute of Chemical Physics Chinese Academy of Sciences school of Chemistry and Chemical Engineering Yantai University Shandong Applied Research Center of Gold Nanotechnology (Au-SDARC)

TiO_2 modified Al_2O_3 binary oxide was prepared by a wet-impregnation method and used as the support for ruthenium catalyst. The catalytic performance of Ru/TiO_2–Al_2O_3catalyst in CO_2 methanation reaction was investigated. Compared with Ru/Al_2O_3 catalyst, the Ru/TiO_2–Al_2O_3catalytic system exhibited a much higher activity in CO_2 methanation reaction. The reaction rate over Ru/TiO_2–Al_2O_3 was 0.59 mol CO_2·(g Ru)1·h-1, 3.1 times higher than that on Ru/Al_2O_3[0.19 mol CO_2·(gRu)-1·h-1]. The effect of TiO_2 content and TiO_2–Al_2O_3calcination temperature on catalytic performance was addressed. The corresponding structures of each catalyst were characterized by means of H_2-TPR, XRD, and TEM. Results indicated that the averaged particle size of the Ru on TiO_2–Al_2O_3support is 2.8 nm, smaller than that on Al_2O_3 support of 4.3 nm. Therefore, we conclude that the improved activity over Ru/TiO_2–Al_2O_3catalyst is originated from the smaller particle size of ruthenium resulting from a strong interaction between Ru and the rutile-TiO_2 support, which hindered the aggregation of Ru nanoparticles.

关键词： CO2 methanation Supported Ru catalyst TiO2–Al2O3 binary oxide