检索结果-南通市图书馆

Enhanced memristor performance via coupling effect of oxygen vacancy and ferroelectric polarization

在线全文

学校读者我要写书评

暂无评论

Journal of Materials science & technology 2024年第4期171卷 139-146页

作者： Zhi Yun Yue Zhi Dong Zhang Zhan Jie Wang Shenyang National Laboratory for Materials science Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China School of Materials science and Engineering University of Science and Technology of ChinaShenyang 110016China School of Materials science and Engineering Shenyang University of TechnologyShenyang 110870China

As a new type of nonvolatile memory,the resistive memristor has broad application prospects in in-formation storage and neural computing based on its excellent resistive switching(RS)*** present,it is still a great challenge to improve both ferroelectric polarization and leakage current to achieve a high RS on/offratio of ferroelectric ***,epitaxial Pb(Zr_(0.40)Ti_(0.60))O_(3)(PZT)thin films with low content Ca doping were deposited on the Nb:SrTiO_(3)substrate to prepare PCZT/NSTO het-erostructures and their RS behaviors were *** research findings show that compared with pure PZT film,the ferroelectric polarization of 1-mol%-Ca-doped PZT film is slightly improved,while the leak-age current is increased by three orders of ***,the RS on/offratio reaches 2.5×10^(5),about three orders of magnitude higher than pure PZT *** theoretical analysis reveals that the RS behavior of PCZT/NSTO heterostructures is controlled by the PCZT/NSTO interfacial barrier and the space charge-limited current *** results demonstrate that the ferroelectricity and electricity of ferroelectric thin films can be improved simultaneously by doping low-content Ca ions to increase the RS performance,which provides a good reference for the development of high-performance ferroelectric memristor devices.

关键词： Ferroelectric memristor Ca-doped PZT Ferroelectric polarization Oxygen vacancies Resistive switching

Comparative evaluation of commercial Douchi by different molds:biogenic amines,non-volatile and volatile compounds

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Food science and Human Wellness 2024年第1期13卷 434-443页

作者： Aijun Li Gang Yang Zhirong Wang Shenglan Liao Muying Du Jun Song Jianquan Kan College of Food science Southwest UniversityChongqing 400715China Chinese-Hungarian Cooperative Research Centre for Food science Chongqing 400715China Laboratory of Quality&Safety Risk Assessment for Agri-products on Storage and Preservation(Chongqing) Ministry of Agriculture and Rural Affairs of the People's Republic of ChinaChongqing 400715China Chongqing Key Laboratory of Speciality Food Co-Built by Sichuan and Chongqing Chongqing 400715China Shu Xiang Douchi Food Research Institute Limited Company Chongqing 402160China

To provide new insights into the development and utilization of Douchi artificial starters,three common strains(Aspergillus oryzae,Mucor racemosus,and Rhizopus oligosporus)were used to study their influence on the fermentation of *** results showed that the biogenic amine contents of the three types of Douchi were all within the safe range and far lower than those of traditional fermented ***-type Douchi produced more free amino acids than the other two types of Douchi,and its umami taste was more prominent in sensory evaluation(P<0.01),while Mucor-type and Rhizopus-type Douchi produced more esters and pyrazines,making the aroma,sauce,and Douchi flavor more *** to the Pearson and PLS analyses results,sweetness was significantly negatively correlated with phenylalanine,cysteine,and acetic acid(P<0.05),bitterness was significantly negatively correlated with malic acid(P<0.05),the sour taste was significantly positively correlated with citric acid and most free amino acids(P<0.05),while astringency was significantly negatively correlated with glucose(P<0.001).Thirteen volatile compounds such as furfuryl alcohol,phenethyl alcohol,and benzaldehyde caused the flavor difference of three types of *** study provides theoretical basis for the selection of starting strains for commercial Douchi production.

关键词： Douchi Starting strains Non-volatile compounds Volatile compounds Sensory evaluation

Aerodynamic Super-Repellent Surfaces

在线全文

学校读者我要写书评

暂无评论

Research 2024年第2期2023卷 115-122页

作者： Fanfei Yu Jinlong Yang Ran Tao Yao Tan Jinpei Wang Dehui Wang Longquan Chen Zuankai Wang Xu Deng Institute of Fundamental and Frontier sciences University of Electronic Science and Technology of ChinaChengdu 610054P.R.China Department of Mechanical Engineering City University of Hong KongKowloonHong Kong Special Administrative Region 999077P.R.China School of Physics.University of Electronic science and technology of China Chengdu 610054P.R.China Department of Mechanical Engineering Hong Kong Polytechnic UniversityKowloonHong Kong Special Administrative Region 999077P.R.China shenzhen Institute for Advanced Study University of Electronic Science and Technology of ChinaShenzhen 518110P.R.China

Repelling liquid drops from engineering surfaces has attracted great attention in a variety of *** achieve efficient liquid shedding,delicate surface textures are often introduced to sustain air pockets at the liquid-solid ***,those surfaces are prone to suffer from mechanical failure,which may bring reliability issues and thus limits their ***,inspired by the aerodynamic Leidenfrost effect,we present that impacting drops are directionally repelled from smooth surfaces supplied with an exogenous air *** theoretical analysis reveals that the synchronized nonwetting and oblique bouncing behavior is attributed to the aerodynamic force arising from the air *** versatility and practicability of our approach allow for drop repellency without the aid of any surface wettability treatment and also avoid the consideration of mechanical stability issues,which thereby provides a promising candidate for the applications that necessitate liquid shedding,e.g.,resolve the problem of tiny raindrop adhesion on the automobile side window during driving.

关键词： thereby driving attributed

Adsorptive interaction between typical VOCs and various topological zeolites:Mixture effect and mechanism

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Environmental sciences 2024年第2期136卷 626-636页

作者： Bo Yu Hua Deng Yuqin Lu Tingting Pan Wenpo Shan Hong He Center for Excellence in Regional Atmospheric Environment and Key Laboratory of Urban Pollutant Conversion Institute of Urban EnvironmentChinese Academy of SciencesXiamen 361021China University of Chinese Academy of sciences Beijing 100049China State Key Joint Laboratory of Environment Simulation and Pollution Control Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China

Adsorption is one of the most feasible and effective methods to alleviate the volatile organic compounds(VOCs)***,the mixture effect and mechanism for competitive adsorption of VOCs on zeolites are barely *** this study,toluene,acetone,and ethyl acetate as prevalent VOCs species were removed by four potential zeolites(13X,USY,Beta,ZSM-5)in both single-and multi-component *** structure-property relationship between adsorbate-adsorbent pairs was revealed by X-ray diffraction,scanning electron microscopy,energy dispersive spectrometer,X-ray fluorescence,N_(2) adsorption and density function theory *** molecular polarity and volatility of VOCs species played key roles in adsorption and the dynamic uptakes were generally listed as follows:ethyl acetate>toluene>*** for the above VOCs mixtures,13X zeolite selectively adsorbed oxygenated VOCs rather than *** contrast,USY exhibited a preference to trap *** acetate could be readily enriched by ZSM-5 and Beta *** possible explanations and implications are discussed based on the subtle change in electron *** results obtained are vital for understanding the mixture effect of VOCs adsorption and may guide the selection of proper adsorbent for real applications.

关键词： Adsorption Zeolites VOCs Mixture effect DFT

Surrounding rock pressure in the tunnel portal section through moraine under freeze-thaw action

在线全文

学校读者我要写书评

暂无评论

Journal of Mountain science 2024年第7期21卷 2480-2493页

作者： CHEN Zhimin LIU Baoli LIU Yaohui XU Jiangtao School of Civil Engineering Lanzhou Jiaotong UniversityLanzhou 730070China CSCEC AECOM Consultants Co. ltdLanzhou 730000China National and local Joint Engineering Laboratory of Road and Bridge Engineering Disaster Prevention technology Lanzhou Jiaotong UniversityLanzhou 730070China

Moraines,characterized by the accumulation of rock and soil debris transported by glacial activity,present unique challenges for tunnel construction,particularly in portal sections,due to prevailing geographical and climatic conditions that facilitate freeze-thaw *** these challenges,there is a dearth of studies investigating the influence of freeze-thaw action and water content on the mechanical properties of moraines,and no research on calculating surrounding rock pressure in moraine tunnels subjected to freeze-thaw *** this study,direct shear tests under freeze-thaw cycles were conducted to examine the effects of freeze-thaw cycles and water content on the mechanical properties of frozen moraine.A comprehensive parameter K,integrating the number of freeze-thaws and water content,was introduced to model cohesion *** on Terzaghi Theory,we propose an improved algorithm for calculating surrounding rock pressure at the portal section of moraine *** a tunnel as a case study,surrounding rock pressure was calculated under various conditions to validate the Improved Algorithm's *** results show that:(1)Strength loss exhibits a linear trend with the number of freeze-thaw cycles at water content levels of 4%and 8%,while at 12%water content,previous freeze-thaw cycles induce more significant damage to the soil.(2)Moraine saturation peaks between 8%and 12%water *** repeated freeze-thaw cycles,moraine shear strength initially increases before decreasing with varying water content.(3)The internal friction angle of moraine experiences slight reductions with prolonged freeze-thaw cycles,but both freeze-thaw cycles and water content significantly influence cohesion.(4)Vertical surrounding rock pressure increases after the initial freeze-thaw cycle,particularly with higher water content,although freeze-thaw cycles have minimal effect on it.(5)Freeze-thaw cycles lead to a substantial increase in lateral surrounding rock pre

关键词： Moraines Freeze-thaw cycles Direct shear test Surrounding rock pressure

Polycystic ovary syndrome: pathogenic mechanisms and nutritional therapeutic strategies

在线全文

学校读者我要写书评

暂无评论

Food science and Human Wellness 2024年

作者： Yanyan Zhao Bin Liu Junying Zhao Yanpin Liu Hang Pan Yuying Yuan Xiaoyan Tian Weicang Qiao Zhenzhen Zhang Lijun Chen School of Public Health， Shandong Second Medical University National Engineering Research Center of Dairy Health for Maternal and Child， Beijing Sanyuan Foods Co.Ltd. Beijing Engineering Research Center of Dairy， Beijing Technical Innovation Center of Human Milk Research， Beijing Sanyuan Foods Co.Ltd. Key Laboratory of Dairy science， Ministry of Education， Food science College， Northeast Agricultural University

Polycystic ovary syndrome (PCOS) is the most common endocrine disease afflicting women of childbearing age. It is characterized by irregular menstruation， clinical or biochemical hyperandrogenemia， and polycystic ovary morphology. As a complex endocrine-metabolic syndrome， PCOS shares several endocrine-metabolic features with the metabolic syndrome (MS)， with insulin resistance at the core of their pathogenic mechanisms. PCOS and MS are interrelated and thus have similarities in treatment. Currently， the common treatment modalities for both are lifestyle intervention， medication， and surgery. More studies have shown that lifestyle intervention and regulation of intestinal flora are more effective and sustainable. However， progress towards treatment and cure is hampered by unclear etiology and mechanisms. This review aimed to summarize the relationship between PCOS and MS， the pathogenesis of metabolic disorders， and the current nutritional therapeutic strategies， especially lifestyle modifications and modulation of intestinal flora. Lifestyle interventions combined with the regulation of gut flora can be a new perspective for treatment. This perspective has a positive significance in the early diagnosis， adoption of personalized treatment plans， and prevention of complications in PCOS and MS. The need to prevent the occurrence of MS in patients with PCOS should be emphasized.

关键词：

Reconfigurable(4, 6^(2)) and(4, 8^(2)) Archimedean plasma photonic crystals in dielectric barrier discharge

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Plasma science and technology 2024年第6期26卷 70-78页

作者：李蕊王启晗刘富成高匡雅侯笑含贾萌萌李庆范伟丽 College of Physics science and technology Hebei UniversityBaoding 071002People’s Republic of China Institute of Electrostatic technology Hebei UniversityBaoding 071002People’s Republic of China

Archimedean photonic crystal has become a research area of great interest due to its various unique properties. Here, we experimentally demonstrate the realization of reconfigurable(4, 6^(2))and(4, 8^(2)) Archimedean plasma photonic crystals(APPCs) by use of dielectric barrier discharges in air. Dynamical control on both the macrostructures including the lattice symmetry and the crystal orientation, and the microstructures including the fine structures of scattering elements has been achieved. The formation mechanisms of APPCs are studied by time-resolved measurements together with numerical simulations. Large omnidirectional band gaps of APPCs have been obtained. The tunable topology of APPCs may offer new opportunities for fabricating multi-functional and highly-integrated microwave devices.

关键词： Archimedean lattice plasma photonic crystals dielectric barrier discharge

Mitophagy and cGAS-STING crosstalk in neuroinflammation

在线全文

学校读者我要写书评

暂无评论

Acta Pharmaceutica Sinica B 2024年第8期14卷 3327-3361页

作者： Xiaogang Zhou Jing Wang Lu Yu Gan Qiao Dalian Qin Betty Yuen-Kwan Law Fang Ren Jianming Wu Anguo Wu Sichuan Key Medical Laboratory of New Drug Discovery and Drugability Evaluation Luzhou Key Laboratory of Activity Screening and Druggability Evaluation for Chinese Materia MedicaKey Laboratory of Medical Electrophysiology of Ministry of EducationSchool of PharmacySouthwest Medical UniversityLuzhou 646000China State Key Laboratory of Quality Research in Chinese Medicine Macao University of Science and TechnologyMacao SAR 999078China Chongqing Key Laboratory of Sichuan-Chongqing Co-construction for Diagnosis and Treatment of Infectious Diseases Integrated Traditional Chinese and Western Medicine Chongqing Traditional Chinese Medicine HospitalChongqing 400021China

Mitophagy,essential for mitochondrial health,selectively degrades damaged *** is intricately linked to the cGAS-STING pathway,which is crucial for innate *** pathway responds to mitochondrial DNA and is associated with cellular stress *** review explores the molecular details and regulatory mechanisms of mitophagy and the cGAS-STING *** critically evaluate the literature demonstrating how dysfunctional mitophagy leads to neuroinflammatory conditions,primarily through the accumulation of damaged mitochondria,which activates the cGAS-STING *** activation prompts the production of pro-inflammatory cytokines,exacerbating *** review emphasizes the interaction between mitophagy and the cGAS-STING *** mitophagy may suppress the cGAS-STING pathway,offering protection against ***,impaired mitophagy may activate the cGAS-STING pathway,leading to chronic ***,we explored how this interaction influences neurodegenerative disorders,suggesting a common mechanism underlying these *** conclusion,there is a need for additional targeted research to unravel the complexities of mitophagy-cGAS-STING interactions and their role in *** review highlights potential therapies targeting these pathways,potentially leading to new treatments for neuroinflammatory and neurodegenerative *** synthesis enhances our understanding of the cellular and molecular foundations of neuroinflammation and opens new therapeutic avenues for neurodegenerative disease research.

关键词： Neuroinflammation Mitophagy cGAS-STING Innate immunity Mitochondrial DNA Crosstalk Therapeutic avenues Neurodegenerative diseases

Research on Fatigue Damage Behavior of Main Beam Sub-Structure of Composite Wind Turbine Blade

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Structural Durability & Health Monitoring 2024年第3期18卷 277-297页

作者： Haixia Kou Bowen Yang Xuyao Zhang Xiaobo Yang Haibo Zhao School of Mechanical Engineering Lanzhou Jiaotong UniversityLanzhou730070China School of New Energy and Power Engineering Lanzhou Jiaotong UniversityLanzhou730070China

Given the difficulty in accurately evaluating the fatigue performance of large composite wind turbine blades(referred to as blades),this paper takes the main beam structure of the blade with a rectangular cross-sectionas the simulation object and establishes a composite laminate rectangular beam structure that simultaneouslyincludes the flange,web,and adhesive layer,referred to as the blade main beam sub-structure specimen,throughthe definition of blade *** paper examines the progressive damage evolution law of the compositelaminate rectangular beam utilizing an improved 3D Hashin failure criterion,cohesive zone model,B-K failurecriterion,and computer simulation *** static loading,the layup angle of the anti-shear web hasa close relationship with the static load-carrying capacity of the composite laminate rectangular beam;under fatigueloading,the fatigue damage will first occur in the lower flange adhesive area of the whole composite laminaterectangular beam and ultimately result in the fracture failure of the entire *** results provide a theoreticalreference and foundation for evaluating and predicting the fatigue performance of the blade main beamstructure and even the full-size blade.

关键词： Composite laminate wind turbine blade sub-structure progressive damage analysis user material subroutine cohesive zone model