检索结果-南通市图书馆

Neural Regeneration Research 2021年第5期16卷 976-977页

作者： Rebecca j.Henry david j.Loane Department of Anesthesiology and Shock Trauma and Anesthesiology Research(STAR)CenterUniversity of Maryland School of MedicineBaltimoreMDUSA School of Biochemistry and Immunology Trinity Biomedical Sciences InstituteTrinity CollegeDublinIreland

Microglia,the resident innate immune cells of the central nervous system(CNS),play important roles in brain development,maintenance,and *** brain sentinels,microglia adopt a surveillant state in healthy tissue characterized by a ramified scanning morphology that maintains CNS homeostasis and contributes to learningassociated synaptic plasticity.

关键词： inflammation homeostasis traumatic

[001]-texturing of(K,Na)NbO_(3)-based piezoceramics with a pseudocubic structure and their application to piezoelectric devices

在线全文

学校读者我要写书评

暂无评论

journal of Materiomics 2024年第3期10卷 632-642页

作者： Su-Hwan Go Seok-jung Park Seung-Hyun Kim Seok-june Chae Eun-ji Kim Geun-Su Lee sahn Nahm Department of Materials Science and Engineering Korea UniversitySeoul02841Republic of Korea

0.96(K_(0.5)Na_(0.5-z)Li_(z))(Nb_(0.92)Sb_(0.08))O_(3)-0.04(Ca_(0.5)Sr_(0.5))ZrO_(3)[(KN_(0.5-z)L_(z))NS-CSZ]piezoceramics(0≤z≤0.04)were aligned in the[001]orientation using 3%(in mole)NaNbO_(3)templates with a large Lotgering factor(>97%).Their crystal structures transformed from the orthorhombic-pseudocubic(O-P)structure to the orthorhombic-tetragonal-pseudocubic(O-T-P)structure with an increasing *** P structure was interpreted as a rhombohedral R3m *** piezoelectricity of the compositions increased after[001]-texturing,and the enhancement was proportional to the O phase *** composition(z=0.03)exhibited the highest piezoelectric constant(d_(33);670 pC/N)and electromechanical coupling factor(k_(p);0.56).Piezoelectric energy harvesters were produced using the untextured and textured samples(z=0.03).The textured harvester delivered a large power density of 26.6 mW/mm^(3),which was larger than that of the untextured harvester owing to the enhanced kp and d_(33)×g_(33) of the textured piezoceramic.A multilayer actuator was produced using the textured sample(z=0.03),and it exhibited a large acceleration(44.2 G)and displacement(±3,730 mm)at±25 ***,the[001]-textured(KN_(0.47)L_(0.03))NS-CSZ piezoceramic is suitable for piezoelectric energy harvesters and actuators.

关键词： KNN-Based piezoceramic Lead-free Energy harvester Actuator Reactive template grain growth

Effects of Cr doping on structural and electrochemical properties of Li_(4)Ti_(5)O_(12) nanostructure for sodium-ion battery anode

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 Energy Chemistry 2021年第8期30卷 465-472,I0010页

作者： Sang Hyuk Gong ji Hyeon Lee Dong Won Chun jee-Hwan Bae Sung-Chul Kim Seungho Yu sahn Nahm Hyung-Seok Kim Center for Energy Storage Research Korea Institute of Science and Technology5Hwarang-ro 14-gilSeongbuk-gu02792 SeoulRepublic of Korea Department of Materials Science and Engineering Korea University145Anam-roSeongbuk-gu02841 SeoulRepublic of Korea Department of Chemical and Biological Engineering Korea University145Anam-roSeongbuk-gu02841 SeoulRepublic of Korea Advanced Analysis Center Korea Institute of Science and Technology5Hwarang-ro 14-gilSeongbuk-gu02792 SeoulRepublic of Korea

Sodium-ion batteries are considered as promising alternatives to lithium-ion batteries,owing to their low cost and abundant raw *** the several candidate materials for the anode,spinel-type Li_(4)Ti_(5)O_(12)has potential owing to its superior safety originating from an appropriate operating voltage and the reversible Na^(+)intercalation ***,a low diffusion coefficient for Na^(+)and the insulating nature of LTO remains challenging for practical sodium-ion battery ***,we present a strategy for integrating physical and chemical approaches to achieve superior electrochemical properties in *** demonstrate that carefully controlling the amount of Cr doping is crucial to enhance the electrochemical properties of nanostructured *** Cr doped LTO shows a superior reversible capacity of 110 m Ah g^(-1) after 400 cycles at 1 C,with a three-fold higher capacity(75 m Ah g^(-1))at 10 C compared with undoped LTO *** suggests that appropriately Cr doped nanostructured LTO is a promising anode material for sodium-ion batteries.

关键词： Sodium-ion batteries Spinel type Li_(4)Ti_(5)O_(12) Anode materials Nanostructuring Cr-doping

A laser extinction based sensor for simultaneous droplet size and vapor measurement

在线全文

学校读者我要写书评

暂无评论

Particuology 2012年第1期10卷 9-16页

作者： Xueqiang Sun david j. Ewing Lin Ma College of Automatic Control and Mechanical Engineering Kunming University Kunming 650214 China Department of Aerospace and Ocean Engineering Virginia Tech Blacksburg VA 24063 USA

Multiphase flows involving liquid droplets in association with gas flow occur in many industrial and sci- entific applications. Recent work has demonstrated the feasibility of using optical techniques based on laser extinction to simultaneously measure vapor concentration and temperature and droplet size and loading. This work introduces the theoretical background for the optimal design of such laser extinction techniques, termed WMLE （wavelength-multiplexed laser extinction）. This paper focuses on the devel- opment of WMLE and presents a systematic methodology to guide the selection of suitable wavelengths and optimize the performance of WMLE for specific applications. WMLE utilizing wavelengths from 0.5 to 10 ixm is illustrated for droplet size and vapor concentration measurements in an example of water spray, and is found to enable unique and sensitive Sauter mean diameter measurement in the range of ~1-15 ~m along with accurate vapor detection. A vapor detection strategy based on differential absorp- tion is developed to extend accurate measurement to a significantly wider range of droplet loading and vapor concentration as compared to strategies based on direct fixed-wavelength absorption. Expected performance of the sensor is modeled for an evaporating spray. This work is expected to lay the ground- work for implementing optical sensors based on WMLE in a variety of research and industrial applications involving multi-phase flows.

关键词： Wavelength-multiplexed laser extinctionDropletMeasurementLaserExtinctionAbsorptionSpectroscopy

A Multi-parametric Programming Based Analytic Method to Compute Consumer Offer Curve for Reserves

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2期10卷 542-546页

作者： Weiye Zheng david j.Hill Wenchuan Wu the School of Electrical Power Engineering South China University of TechnologyGuangzhouChina the Department of Electrical and Electronic Engineering The University of Hong KongHong KongChina the Department of Electrical Engineering Tsinghua UniversityBeijingChina

Abstract-An analytic method is proposed to compute the price-reserve offer curve at the consumer level in hierarchical direct load *** convexification of the consumer reserve provision is examined,and the analytic expression of the optimal solution within each critical region is ***,based on multi-parametric programming,a combinatorial enumeration method in conjunction with efficient reduction and pruning strategy is proposed to compute the optimal response of consumers in the whole price *** tests along with an application example in the bi-level aggregator pricing problem demonstrate the merit of this method.

关键词： Direct load control multi-parametric programming price-reserve offer curve analytic solution

Analysis of a Casimir-driven parametric amplifier with resilience to Casimir pull-in for MEMS single-point magnetic gradiometry

在线全文

学校读者我要写书评

暂无评论

Microsystems & Nanoengineering 2021年第5期7卷 183-193页

作者： josh javor Zhancheng Yao Matthias Imboden david K.Campbell david j.Bishop Department of Mechanical Engineering Boston UniversityBostonMA 02215USA Division of Materials Science and Engineering Boston UniversityBostonMA 02215USA K-MEMS St.BlaiseSwitzerland Department of Electrical Engineering Boston UniversityBostonMA 02215USA Department of Physics Boston UniversityBostonMA 02215USA Department of Biomedical Engineering Boston UniversityBostonMA 02215USA

The Casimir force,a quantum mechanical effect,has been observed in several microelectromechanical system(MEMS)*** to its extreme sensitivity to the separation of two objects,the Casimir force has been proposed as an excellent avenue for quantum *** application,however,is challenging due to attractive forces leading to stiction and device failure,called Casimir *** this work,we design and simulate a Casimir-driven metrology platform,where a time-delay-based parametric amplification technique is developed to achieve a steady-state and avoid *** apply the design to the detection of weak,low-frequency,gradient magnetic fields similar to those emanating from ionic currents in the heart and *** parameters are selected from recent experimental platforms developed for Casimir metrology and magnetic gradiometry,both on MEMS *** a MEMS offers many advantages to such an application,the detected signal must typically be at the resonant frequency of the device,with diminished sensitivity in the low frequency regime of biomagnetic *** a Casimir-driven parametric amplifier,we report a 10,000-fold improvement in the best-case resolution of MEMS single-point gradiometers,with a maximum sensitivity of 6 Hz/(pT/cm)at 1 *** development of the proposed design has the potential to revolutionize metrology and may specifically enable the unshielded monitoring of biomagnetic fields in ambient conditions.

关键词： parametric Casimir apply

Falling sperm counts and global oestrogenic pollution：postscript

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Asian journal of Andrology 2013年第2期15卷 208-211页

作者： Trevor G Cooper david j Handelsman Tuen Mun NT Hong Kong SAR PR China ANZAC Research Institute Concord Hospital & University of Sydney Sydney New South Wales 2139 Australia

This Special Issue provides reflections after 20 years, summarized in 12 papers, on the controversial issue of alleged decline in human sperm output due to global oestrogen pollution by industrial chemicals.

关键词：

Neuromodulator interactions and spinal cord injury in lamprey

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Neural Regeneration Research 2018年第4期13卷 643-644页

作者： david Parker Thomas j.McClelland Department of Physiology Neuroscience and DevelopmentUniversity of Cambridge

Neuromodulation is mediated by neurotransmitters that typically act on G-protein-coupled *** can confer behavioural flexibility by modifying the functional properties of anatomically hard-wired neural *** neuromodulators generally have divergent cellular and synaptic effects（Harris-Warrick and johnson,2010）,and different modulators,

关键词： Figure Neuromodulator interactions and spinal cord injury in lamprey

Falling sperm counts and global estrogenic pollution： what have we learned over 20 years？

在线全文

学校读者我要写书评

暂无评论

Asian journal of Andrology 2013年第2期15卷 159-161页

作者： david j Handelsman Trevor G Cooper ANZAC Research Institute Concord Hospital & University of Sydney Sydney New South Wales 2139 Australia Tuen Mun NT Hong Kong SAR PR ChinaGuest Editors for this special issue: Prof. DJ Handelsman

If scandal is the engine of progress in politics, and sensation is that of the media, while anti-modern panic is that of environmentalism, what is the dynamic of medical science？ Certainly discovery and invention represent the admirable high road, whereas competition and controversy represent the quotidian low road. This Special Issue is directed to reviewing the lessons learned from the most public, fervent and durable controversy in the short history of Andrology, the claims of world-wide falling sperm counts, due to global pollution by industrial estrogenic chemicals, published two decades ago.

关键词：

China Stroke Statistics 2019: a wealth of opportunities for stroke prevention

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Stroke & Vascular Neurology 2020年第3期5卷 240-241页

作者： j david Spence Stroke Prevention & Atherosclerosis Research Centre Western University Robarts Research Institute London Ontario Canada

The China Stroke Statistics published in this issue of the journal1 represent an enormous *** included data on 3010204 patients who had a stroke admitted in 2018 to 1853 tertiary care hospitals and compiled data from multiple sources on stroke and stroke risk factors in *** authors and the huge team of workers who must have compiled the statistics are to be commended on this enormous *** the report is a wealth of data on what is wrong in China to cause such a high risk of stroke but also a wealth of opportunity to make a *** reason this is so important is that~80%of strokes are preventable.

关键词： prevention admitted journal