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nickel oxide thin films grown by chemical deposition techniques: Potential and challenges in next-generation rigid and flexible device applications

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InfoMat 2021年第5期3卷 536-576页

作者： Mari napari Tahmida n.Huq Robert L.Z.Hoye Judith L.MacManus-Driscoll Department of Materials Science and Metallurgy University of CambridgeCambridgeUK Centre for Electronics Frontiers Zepler Institute for Photonics and NanoelectronicsUniversity of SouthamptonSouthamptonUK Department of Materials Imperial College LondonLondonUK

nickel oxide(niOx),a p-type oxide semiconductor,has gained significant attention due to its versatile and tunable *** has become one of the critical materials in wide range of electronics applications,including resistive switching random access memory devices and highly sensitive and selective sensor *** addition,the wide band gap and high work function,coupled with the low electron affinity,have made niOx widely used in emerging optoelectronics and p-n *** properties of niOx thin films depend strongly on the deposition method and *** implementation of niOx in next-generation devices will require controllable growth and processing methods that can tailor the morphological and electronic properties of the material,but which are also compatible with flexible *** this review,we link together the fundamental properties of niOx with the chemical processing methods that have been developed to grow the material as thin films,and with its application in electronic *** focus solely on thin films,rather than niOx incorporated with one-dimensional or two-dimensional *** review starts by discussing how the p-type nature of niOx arises and how its stoichiometry affects its electronic and magnetic *** discuss the chemical deposition techniques for growing niOx thin films,including chemical vapor deposition,atomic layer deposition,and a selection of solution processing approaches,and present examples of recent progress made in the implementation of niOx thin films in devices,both on rigid and flexible ***,we discuss the remaining challenges and limitations in the deposition of device-quality niOx thin films with chemical growth methods.

关键词： atomic layer deposition chemical vapor deposition electronics nickel oxide solution processing thin films

基于超音速火焰喷涂的飞机燃油泵电机转轴修复技术研究

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材料保护 2024年第2期57卷 148-153,161页

作者：陈宇鹏谢楚炎杜鹏程张岩高名传凌云科技集团有限责任公司湖北武汉430030 中国机械总院集团武汉材料保护研究所有限公司湖北武汉430030 特种表面保护材料及应用技术国家重点实验室湖北武汉430030

某飞机离心式燃油泵电机转轴长时间与动密封配磨产生机械损伤,从而导致机上燃油泵油嘴漏油,影响飞行安全。为解决转轴的磨损问题,采用超音速火焰喷涂WC硬质合金涂层的方法对转轴进行增材修复。通过调整超音速火焰喷涂煤油流量在2Cr13基... 详细信息

某飞机离心式燃油泵电机转轴长时间与动密封配磨产生机械损伤,从而导致机上燃油泵油嘴漏油,影响飞行安全。为解决转轴的磨损问题,采用超音速火焰喷涂WC硬质合金涂层的方法对转轴进行增材修复。通过调整超音速火焰喷涂煤油流量在2Cr13基体表面喷涂了3种不同组织结构和力学性能的WC-12Co硬质合金涂层,研究了煤油流量对涂层孔隙率、显微硬度、断裂韧性、结合强度以及涂层磨损性能的影响规律。结果表明:在氧气流量不变的情况下增加煤油流量能够提升粒子的温度和速率,降低涂层的孔隙率,提升涂层的断裂韧性以及结合强度;涂层越致密,涂层的硬度越大,同时致密的结构可以减少WC粒子在摩擦过程中的剥落,涂层耐磨性好。通过试验获得了最佳的转轴修复工艺参数,修复后的转轴经过1000 h磨合试验后涂层无明显磨损和损伤,尺寸变化量不大于0.01 mm,产品性能符合技术要求。

关键词：转轴漏油故障超音速火焰喷涂 WC-12Co 涂层增材修复

Laryngopharyngeal reflux and Helicobacter pylori

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World Journal of Gastroenterology 2014年第27期20卷 8964-8970页

作者： Taner Yllmaz Münir Demir Bajin Rlza nder Günayd?n Serdar zer Tevfik Szen Department of Otolaryngology Head and neck Surgery Hacettepe University Hospital

Laryngopharyngeal reflux(LPR) occurs when gastric contents pass the upper esophageal sphincter, causing symptoms such as hoarseness, sore throat, coughing, excess throat mucus, and globus. The pattern of reflux is different in LPR and gastroesophageal reflux. LPR usually occurs during the daytime in the upright position whereas gastroesophageal reflux disease more often occurs in the supine position at night-time or during sleep. Ambulatory 24-h double pH-probe monitoring is the gold standard diagnostic tool for LPR. Acid suppression with proton pump inhibitor on a long-term basis is the mainstay of treatment. Helicobacter pylori(H. pylori) is found in many sites including laryngeal mucosa and interarytenoid region. In this paper, we aim to present the relationship between LPR and H. pylori and review the current literature.

关键词： Laryngophrayngeal reflux Helicobacter pylori Gastroesophageal reflux disease Proton pump inhibitors

natural Bond Orbitals(nBO),natural Population Analysis,Mulliken Analysis of Atomic Charges of 2-[(2,3-Dimethylphenyl)Amino]Benzoic Acid

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光谱学与光谱分析 2016年第4期36卷 1273-1276页

作者： n.Balamurugan S.Sampathkrishnan C.Charanya Department of Physics Sri Lakshmi Ammaal Engineering College Department of Physics Sri Venkateswara College of Engineering Research Scholar Department of PhysicsSri Venkateshwara College of Engineering

The spectroscopic properties of the FT-IR and FT-Raman spectra of the 2-[(2,3-dimethylphenyl)amino]benzoic acid(DMPABA)compound have been recorded in the region 4 000~400cm^(-1).The molecular structure,vibrational wavenumbers were calculated using DFT(B3LYP)method with 6-31G(d,p)and 6-311++G(d,p)basis *** Geometrical structure,vibrational frequencies,corresponding vibrational assignments of 2-[(2,3-dimethylphenyl)amino]benzoic acid(DMPABA)have been investigated experimentally and theoretically using Gaussian03 software *** detailed Molecular orbital calculation such as natural Bond Orbitals(nBO),natural Population Analysis(nPA)and Mulliken analysis of atomic charges is also calculated.

关键词： dmpaba DFT nBO nPA

Correlation Between Coastal Geomorphology and Tsunami Inundation Along the Coast of Kanyakumari,India

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Journal of Ocean University of China 2012年第1期11卷 1-6页

作者： n.Chandrasekar S.Saravanan M.Rajamanickam C.Hentry G.V.Rajamanickam Centre for GeoTechnology Manonmaniam Sundaranar UniversityTirunelveliIndia Department of Disaster Management SASTRA UniversityThanjavurIndia

An investigation has been carried out in the vicinity of the coastal villages of Kanyakumari District,India to decode the influence of coastal geomorphology on inundation degree and run-up *** though the tsunami waves approach the study area in different patterns,the consequences are found to be mainly dependent upon the coastal configuration and local geographic setting,the study area are considered to be of three types based upon the geomorphic arrangement,namely shallow coast,elevated coast and estuarine *** inundation and run-up level vary from coast to coast even though there is no remarkable variation in the intensity of the approaching tsunami *** inundation extent ranges from to 54 m to 413 m with maximum along estuarine coast and minimum along elevated *** coast recorded the maximum run-up level of about 6 m and the minimum of about 1 m along the elevated *** percentage of inundated area in the total coastal area varies between 19% to 10% along estuarine coast and elevated coast *** and run-up level cannot be appreciable in the inland along the elevated *** beaches of elevated coast are less affected whereas those of estuarine coast are highly *** is limited in the elevated beaches along the study area.

关键词： tsunami India coast geomorphology inundation

Kinematic alterations after two high-intensity intermittent training protocols in endurance runners

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Journal of Sport and Health Science 2019年第5期8卷 442-449页

作者： Felipe García-Pinillos Alejandro Molina-Molina Juan A.Párraga-Montilla Pedro A.Latorre-Román Department of Corporal Expression University of JaenJaen 23071Spain Human Lab Sport and Health University Institute(iMUDS)Granada 18007Spain

Purpose:This study aimed to evaluate running kinematic characteristics during the early and late stages of 2 high-intensity intermittent training(HIIT)protocols with similar external load but different average running pace,as well as to compare the fatigue-induced changes during both HIIT protocols at a kinematic ***:Eighteen endurance runners were tested on a track on 2 occasions:10 runs of 400 m with 90-120 s recovery between running bouts(10 × 400 m),and 40 runs of 100 m with 25-30 s recovery between running bouts(40 × 100 m).Heart rate was monitored during both protocols;blood lactate accumulation and rate of perceived exertion were recorded after both exercises.A high-speed camera was used to measure sagittalplane kinematics at the first and last runs during both HIIT *** dependent variables were spatial-temporal parameters(step length and contact and flight time),joint angles during support(relative angles of the hip,knee,and ankle),and foot strike ***:High levels of exhaustion were reached by the athletes during both workouts(blood lactate accumulation>12 mmol/L,rate of perceived exertion>15;peak heart rate(HRpeak)>176 bpm).A within-protocol paired t test(first *** run)revealed no significant changes(p≥0.05)in kinematic variables during any of the HIIT sessions.A between-protocol comparison with the first run of each protocol revealed the effect of running speed on kinematics:+2.44 km/h during the 40 × 100 m:shorter contact and flight time(pnd longer step length(p= 0.001);greater hip flexion(p = 0.031)and ankle extension(p = 0.001)at initial contact;smaller knee and ankle flexion(pnce;and greater hip extension at toe-off(pnclusion:HIIT sessions including runs for 15-90 s and performed at intensity above the velocity associated with maximal oxygen uptake did not consistently perturb the running kinematics of trained endurance runners.

关键词： Biomechanics Fatigue-induced Runners Running Training Two-dimensional

A self-stabilised walking gait for humanoid robots based on the essential model with internal states

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IET Cyber-Systems and Robotics 2022年第4期4卷 283-297页

作者： Qiuyue Luo Christine Chevallereau Yongsheng Ou Jianxin Pang Victor De-León-Gómez Yannick Aoustin Shenzhen Institutes of Advanced Technology Chinese Academy of SciencesShenzhenChina Research Institute of UBTech Robotics ShenzhenChina Laboratoire des Sciences du numerique de nantes(LS2n) CNRSCentrale NantesNantes UniversitéNantesFrance FCA at the Univerdidad Autónoma de Coahuila TorreónMéxico

Walking stability is one of the key issues for humanoid robots.A self-stabilised walking gait for a full dynamic model of humanoid robots is *** simplified models,that is,the linear inverted pendulum model and variable-length inverted pendulum model,self-stabilisation of walking gait can be obtained if virtual constraints are properly *** result is extended to the full dynamic model of humanoid robots by using an essential dynamic model,which is developed based on the zero dynamics *** the proposed method,a robust stable walking for a humanoid robot is achieved by adjusting the step timing and landing position of the swing foot automatically,following its intrinsic dynamic *** exempts the robot from the time-consuming high-level control approaches,especially when a full dynamic model is *** different walking patterns/features(i.e.,the swing foot motion,the vertical centre of mass motion,the switching manifold configuration,etc.)affect the stability of the walking gait is *** are conducted on robots Romeo and TALOS to support the results.

关键词： dynamic stability humanoid and bipedal locomotion passive walking

Secondary X-Ray Environment in the Lower Atmosphere of the Earth during Monsoon Season over Udaipur City （India） in July-September 2006

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Chinese Physics Letters 2009年第8期26卷 381-384页

作者： S. n. A. Jaaffrey Shubhra Tiwari Laboratory of Astronomy and Astrophysics Department of Physics University College of Science M. L. Sukhadia University UDAIPUR (Raj.)-313001 India

We present a study on the secondary x-rays of energy band 2-100 keV emitted by the intruded principal pollutant components （gases and minerals） brought up in the lower atmosphere by dust storms, monsoon drift and the gravitational pull on meteoritic showers. On the ground we employed a 1.5 × 1 inch^2 naI crystal in a scintillation detector, suitable for the energy range 2-100 keV of secondary x-rays, providing better energy resolution than a larger sized crystal. In order to eliminate the radioactive background of the Earth, the detector was well shielded on all sides with the help of the lead （Pb） container, except with *** open window at the top to permit only vertically incident secondary radiation. The results from the data analysis obtained during the monsoon over Udaipur city （India） during the period from July to September （2006） have revealed a linear correlation between dust storm cure monsoon clouds and observed luminosities of secondary x-ray radiation from intruded pollutants. We found intense flux of secondary x-rays from the intruded pollutants when heavy dust and monsoon clouds were brought up by dust storms and monsoon drift in the lower atmosphere over Udaipur city as compared to normal days. Thus, secondary x-rays in the environment provide a tool for investigation of local intrusive pollutant components in the lower atmosphere.

关键词： sea surface nonliear interaction numerical method

Dry sliding wear behavior of stir cast AA6061-T6/Aln_p composite

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Transactions of nonferrous Metals Society of China 2014年第9期24卷 2785-2795页

作者： B.ASHOK KUMAR n.MURUGAn I.DInAHARAn Department of Mechanical Engineering Faculty of EngineeringErode Builder Educational Trust’s Group of InstitutionsNathakadaiyur Kangayam – 638108 Tirupur District Tamil Nadu India Department of Mechanical Engineering Coimbatore Institute of TechnologyCoimbatore – 641014 Tamil Nadu India Department of Mechanical Engineering V V College of Engineering Tisaiyanvilai – 627657 Tamil Nadu India

The dry sliding wear behavior of AA6061 matrix composite reinforced with aluminium nitride particles（Aln） produced by stir casting process was investigated. A regression model was developed to predict the wear rate of the prepared composite. A four-factor, five-level central composite rotatable design matrix was used to minimize the number of experimental runs. The factors considered in this study were sliding velocity, sliding distance, normal load and mass fraction of Aln reinforcement in the matrix. The developed regression model was validated by statistical software SYSTAT 12 and statistical tools such as analysis of variance（AnOVA） and student＇s t test. It was found that the developed regression model could be effectively used to predict the wear rate at 95% confidence level. The influence of these factors on wear rate of AA6061/Alnp composite was analyzed using the developed regression model and predicted trends were discussed with the aid of worn surface morphologies. The regression model indicated that the wear rate of cast AA6061/Alnp composite decreased with an increase in the mass fraction of Aln and increased with an increase of the sliding velocity, sliding distance and normal load acting on the composite specimen.

关键词： aluminium matrix composite particle-reinforcement wear regression model