检索结果-南通市图书馆

Analogue Soliton with Variable Mass in Super-Conducting Quantum Interference Devices

在线全文

学校读者我要写书评

暂无评论

Chinese Physics Letters 2020年第4期37卷 145-148页

作者：杨颖田泽华荆继良 Department of Physics Key Laboratory of Low Dimensional Quantum Structures and Quantum Control of Ministry of Educationand Synergetic Innovation Center for Quantum Effects and ApplicationsHunan Normal UniversityChangsha 410081 CAS Key Laboratory of Microscale Magnetic Resonance and Department of Modern Physics University of Science and Technology of ChinaHefei 230026

It is difficult to investigate the behavior of solitons in realistic inhomogeneity media in experiment due to inhomogeneity of the media and noise from the unwanted coupling.We propose to use a waveguide-like transmission line which is based on direct-current super-Conducting quantum interference devices to simulate behavior of solitons because we find that the beha vior of the node flux in this transmission is similar to that of solitons with variable mass.

关键词： solitons Conducting media

Improved deterministic and stochastic models for simulating partial discharges in non‐Conducting trees inside solid dielectrics

在线全文

学校读者我要写书评

暂无评论

High Voltage 2021年第1期6卷 82-94页

作者： Johnatan M.Rodríguez‐Serna Ricardo Albarracín‐Sánchez Department of Electrical and Electronic Engineering Automatic Controland Applied PhysicsSchool of Industrial Design and Engineering(ETSIDI)Universidad Politécnica de Madrid(UPM)MadridSpain Department of Electrical Engineering Universidad de AntioquiaMedellínColombia

Electrical trees are defects originated and driven by partial discharges(PD)activity and this is the reason why their modelling and simulation are fundamental for the ageing mechanisms comprehension and diagnosis analyses of insulation systems compound by solid dielectrics.This study presents a brief review of the different models implemented to simulate PD in electrical trees inside solid dielectrics.In addition,an improved deterministic model as well as a stochastic model are presented,which allow predicting adequately the PD pulses distribution,in magnitudes and phase,for non‐Conducting electrical trees of different shape and length.Two case studies were simulated and their results exhibit good agreement when compared with measurements presented in the literature.It is concluded that the main parameters that state the PD behaviour in trees are the inception and extinction voltage mag-nitudes,including their probability distributions,and the tree geometry.The models can be used for prognosis analysis based on on‐line measurements.

关键词： solid Conducting electrical

Some thoughts on Conducting and implementing clinical practice guidelines in a pandemic

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 Medical Journal 2021年第8期134卷 910-912页

作者： Xiaomei Yao Ying-Hui Jin Benjamin Djulbegovic Departm ent of Health Research Evidence and ImpactMcMaster UniversityHamiltonOntarioCanada Center for Evidence-based and Translational Medicine Zhongnan Hospital of Wuhan UniversityWuhanHubei 430071China Department of Supportive Care Medicine Department of HematologyCity of Hope National Medical CenterDuarteCAUSAProgram for Evidence-based Medicine and Comparative Effectiveness ResearchDuarteCAUSA.

A pandemic is a disease that spreads worldwide.When disease is new such as coronavirus disease 2019(COVID-19),evidentiary basis,by definition,to prevent,diagnose,and treat the disease is limited.Nevertheless,clinical practice guidelines are urgently required to assist policy and healthcare workers to make informed decisions.But,acting in the high-quality evidentiary vacuum,that is,basing guidelines on poor-quality research can be counterproductive and potentially harmful.[1,2] Thus,guideline developers face a number of challenges during a pandemic like COVID-19 that we wish to address in this paper.

关键词： clinical evident Conducting

Supramolecular Conducting microfibers from amphiphilic tetrathiafulvalene-based organogelator

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2019年第1期30卷 123-126页

作者： Xuemei Liang Lei Wang Kwangun Jeong Myonghoon Lee College of Information Technology Jilin Agricultural University Department of Polymer/Nano Science and Technology Chonbuk National University National Center for Nanoscience and Technology (NCNST)

An amphiphilic tetrathiafulvalene molecule was designed and readily synthesized. The am-TTF can gelate a variety of organic solvents in view of multiple intermolecular interactions, especially in polar solvent.SEM observation provided clear evidence for the self-assembled micro/nanofibers morphologies in gelation state. Moreover, XRD measurements indicated the formation of highly-ordered columnar structures. The FT-IR spectra revealed that the formation of mixed-valence states with the absorption over 1700 cm^(-1), showing the semiconductive behaviors with the conductivity of 10^(-4)S/cm. The am-TTF based Conducting fibers could be promising candidates for organic electronics.

关键词： Tetrathiafulvalene Fiber Gelator Supramolecular Conducting

Conducting health policy analysis in primary care research: turning clinical ideas into action

在线全文

学校读者我要写书评

暂无评论

Family Medicine and Community Health 2019年第2期7卷 53-59页

作者： Alina Engelman Ben Case Lisa Meeks Michael D Fetters Health Sciences California State UniversityEast BayHaywardCaliforniaUSA Department of Family Medicine University of MichiganAnn ArborMichiganUSA Family Medicine University of MichiganAnn ArborMichiganUSA

Healthcare guidelines play a prominent role in the daytoday practice of primary care providers,and health policy research leads to the formation of these guidelines.Health policy research is the multidisciplinary approach to public policy explaining the interaction between health institutions,special interests and theoretical constructs.In this article,we demonstrate how primary care providers can conduct high-impact health policy research using Eugene Bardach’s eightfold policy analysis framework in a primary care context.In a medical case,a woman with a history of total hysterectomy had scheduled a visit for a Papanicolaou(Pap)smear screening test as part of a well-woman health check-up with a family medicine resident.Conflicting recommendations on Pap smear screening after total hysterectomy sparked an investigation using the US Preventive Services Task Force criteria for Conducting a health policy analysis.We illustrate broadly how clinical care dilemmas can be examined by using Bardach’s broadly applicable health policy framework in order to inform meaningful policy change.Bardach’s framework includes(1)defining the problem,(2)assembling evidence,(3)constructing alternatives,(4)selecting criteria,(5)projecting outcomes,(6)confronting trade-offs,(7)decision-making and(8)sharing the results of the process.The policy analysis demonstrated insufficient evidence to recommend Pap test screening after hysterectomy and the findings contributed to national recommendations.By following Bardach’s steps,primary care researchers have a feasible and powerful tool for Conducting meaningful health policy research and analysis that can influence clinical practice.

关键词： policy meaningful Conducting

收音机频率磁控管劈啪作响种的透明进行的做铝的 ZnO 电影的性质

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 Physics B 2012年第6期21卷 413-416页

作者：修显武赵文静 School of Physics and Electronics Shandong Normal University Jinan No.3 Vocational School

Transparent Conducting molybdenum-doped zinc oxide films are prepared by radio frequency(RF) magnetron sputtering at ambient temperature.The MoO3 content in the target varies from 0 to 5 wt%,and each film is polycrystalline with a hexagonal structure and a preferred orientation along the c axis.The resistivity first decreases and then increases with the increase in MoO3 content.The lowest resistivity achieved is 9.2 × 10-4.cm,with a high Hall mobility of 30 cm2.V-1.s-1 and a carrier concentration of 2.3×1020 cm-3 at an MoO3 content of 2 wt%.The average transmittance in the visible range is reduced from 91% to 80% with the increase in the MoO3 content in the target.

关键词： molybdenum oxide zinc oxide magnetron sputtering transparent Conducting oxides

Dependence of Thermal Annealing on Transparent Conducting Properties of HoF_3-Doped ZnO Thin Films

在线全文

学校读者我要写书评

暂无评论

Chinese Physics Letters 2019年第5期36卷 75-78页

作者：罗劲松林杰张立功郭晓阳朱永福 Key Laboratory of Automobile Materials Ministry of Education and School of Materials Science and EngineeringJilin University State Key Laboratory of Luminescence and Applications Changchun Institute of Optics Fine Mechanics and PhysicsChinese Academy of Sciences

A kind of n-type HoF_3-doped zinc oxide-based transparent conductive film has been developed by electron beam evaporation and studied under thermal annealing in air and vacuum at temperatures 100–500℃.Effective substitutional dopings of F to O and Ho to Zn are realized for the films with smooth surface morphology and average grain size of about 50 nm.The hall mobility,electron concentration,resistivity and work function for the asdeposited films are 47.89 cm^2/Vs,1.39×10^(20)cm^(-3),9.37×10^(-4)Ω·cm and 5.069 eV,respectively.In addition,the average transmittance in the visible region(400–700 nm)approximates to 87%.The HoF_3:ZnO films annealed in air and vacuum can retain good optoelectronic properties under 300℃,thereinto,more stable electrical properties can be found in the air-annealed films than in the vacuum-annealed films,which is assumed to be a result of improved nano-crystalline lattice quality.The optimized films for most parameters can be obtained at 200℃ for the air-annealing case and at room temperature for the vacuum annealing case.The advisable optoelectronic properties imply that HoF_3:ZnO can facilitate carrier injection and has promising applications in energy and light sources as transparent electrodes.

关键词： ZnO Ho Dependence of Thermal Annealing on Transparent Conducting Properties of HoF3-Doped ZnO Thin Films

Transparent Conducting materials discovery using high-throughput computing

在线全文

学校读者我要写书评

暂无评论

npj Computational Materials 2019年第1期5卷 606-618页

作者： Guillaume Brunin Francesco Ricci Viet-Anh Ha Gian-Marco Rignanese Geoffroy Hautier UCLouvain Institut de la Matière Condensée et des Nanosciences(IMCN)Chemin desÉtoiles 8Louvain-la-Neuve 1348Belgium

Transparent Conducting materials(TCMs)are required in many applications from solar cells to transparent electronics.Developing high performance materials combining the antagonistic properties of transparency and conductivity has been challenging especially for p-type materials.Recently,high-throughput ab initio computational screening has emerged as a formidable tool for accelerating materials discovery.In this review,we discuss how this approach has been applied for identifying TCMs.We provide a brief overview of the different materials properties of importance for TCMs(e.g.,dopability,effective mass,and transparency)and present the ab initio techniques available to assess them.We focus on the accuracy of the methodologies as well as their suitability for high-throughput computing.Finally,we review the different high-throughput computational studies searching for new TCMs and discuss their differences in terms of methodologies and main findings.

关键词： transparency Conducting suitability

基于导电聚合物水凝胶材料的高性能柔性固态超级电容器（英文）

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

Science China Materials 2016年第6期59卷 412-420页

作者：王凯张熊孙现众马衍伟 Institute of Electrical Engineering Chinese Academy of SciencesBeijing 100190China

不同于固体电极,导电聚合物水凝胶电极因含有大量水和离子可以使得导电聚合物与电解质实现分子层次的直接接触,这会使得电化学反应过程更加高效.此外,水凝胶内在的柔软特性,会赋予电极优越的柔性特点,有利于制备高柔性电子器件.本文简... 详细信息

不同于固体电极,导电聚合物水凝胶电极因含有大量水和离子可以使得导电聚合物与电解质实现分子层次的直接接触,这会使得电化学反应过程更加高效.此外,水凝胶内在的柔软特性,会赋予电极优越的柔性特点,有利于制备高柔性电子器件.本文简要介绍了基于导电聚合物水凝胶电极材料的柔性固态超级电容器的最新研究进展,并对未来研究方向做了展望.

关键词： Conducting polymer hydrogels flexible supercapacitor soft electrode polyaniline integrated device