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Magnetic and electrical properties of zincblende CrAs

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Chinese Physics B 2008年第6期17卷 2204-2207页

作者：陈鹏 Takamura k SouthWest University Department of Physics Research Institute of Electrical Communication Tohoku University

This paper reports that 9nm zincblende CrAs is grown by molecular-beam epitaxy on InAs buffer layer. The zb-CrAs shows ferromagnetism at room temperature and the total magnetic moment 3.09 ±0.15μB per CrAs unit. The... 详细信息

关键词： zincblende molecular-beam epitaxy half-metal

Total and Extractable Manganese and Iron in Some Cultivated Acid Soils of India:Status,Distribution and Relationship with Some Soil Properties

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Pedosphere 2014年第2期24卷 196-208页

作者： S.k.BEHERA A.k.SHUkLA Directorate of Oil Palm Research (DOPR) Indian Institute of Soil Science (IISS)

A total of 400 surface soil （0-15 cm） samples were collected from cultivated soils representing four soil series, namely, Hariharapur, Debatoli, Rajpora and Neeleswaram in Orissa, Jharkhand, Himachal Pradesh and kerala states of India, respectively, and were analyzed to measure the contents of total and extractable Mn and Fe, to establish the relationship among total and extractable Mn and Fe and soil properties, and to characterize the spatial distribution pattern of Mn and Fe in some cultivated acid soils of India. The contents of total as well as extractable Mn and Fe varied widely with extractants and soil series. However, the amounts of Mn or Fe extracted by diethylene triamine penta-acetic acid （DTPA）, Mehlich 1, Mehlich 3, 0.1 mol L-1 HC1 and ammonium bicarbonate DTPA （ABDTPA） were significantly correlated with each other （P 〈 0.01）. Based on the DTPA-extractable contents and the critical limits （2 mg Mn kg-1 soil and 4.5 mg Fe kg-1 soil） published in the literature, Mn and Fe deficiencies were observed in 7% 23% and 1%-3% of the soil samples, respectively. The content of soil organic carbon （SOC） had greater influence on total and DTPA-extractable Fe than did soil pH. Geostatistical analysis revealed that total and DTPA-extractable Mn and Fe contents in the acid soils were influenced by soil pH, SOC content, and exchangeable cations like potassium, calcium and magnesium. Spatial distribution maps of total and DTPA-extractable Mn and Fe in soil indicated different distribution patterns.

关键词： micronutrients extractant geostatistical analysis spatial variability

H.264/SVC Mode Decision Based on Mode Correlation and Desired Mode List

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International Journal of Automation and computing 2014年第5期11卷 510-516页

作者： L.Balaji k.k.Thyagharajan Faculty of Information and Communication Anna University RMD Engineering College

Design of video encoders involves implementation of fast mode decision(FMD) algorithm to reduce computation complexity while maintaining the performance of the coding. Although H.264/scalable video coding(SVC) achieves high scalability and coding efficiency, it also has high complexity in implementing its exhaustive computation. In this paper, a novel algorithm is proposed to reduce the redundant candidate modes by making use of the correlation among layers. A desired mode list is created based on the probability to be the best mode for each block in base layer and a candidate mode selection in the enhancement layer by the correlations of modes among reference frame and current frame. Our algorithm is implemented in joint scalable video model(JSVM)9.19.15 reference software and the performance is evaluated based on the average encoding time, peak signal to noise ration(PSNR)and bit rate. The experimental results show 41.89% improvement in encoding time with minimal loss of 0.02 dB in PSNR and 0.05%increase in bit rate.

关键词： H.264 scalable video coding mode decision mode correlation rate distortion cost

Novel Power-Aware Optimization Methodology and Efficient Task Scheduling Algorithm

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Computer Systems Science & Engineering 2022年第4期41卷 209-224页

作者： k.Sathis kumar k.Paramasivam Department of Computer Science and Engineering Bannari Amman Institute of TechnologySathyamangalam638401TamilnaduIndia Department of Electrical and Electronics Engineering Kumaraguru College of TechnologyCoimbatore641049TamilnaduIndia

The performance of central processing units(CPUs)can be enhanced by integrating multiple cores into a single *** performance can be improved by allocating the tasks using intelligent *** Small tasks wait for long time or executes for long time,then CPU consumes more ***,the amount of power consumed by CPUs can be reduced without increasing the *** are used to connect cores,which are organized together to form a network called network on chips(NOCs).NOCs are mainly used in the design of ***,its performance can still be enhanced by reducing power *** main problem lies with task scheduling,which fully utilizes the ***,we propose a novel randomﬁt algorithm for NOCs based on power-aware *** this algorithm,tasks that are under the same application are mapped to the neighborhoods of the same application,whereas tasks belonging to different applications are mapped to the processor cores on the basis of a series of *** scheduling process is performed during the run *** results show that the proposed randomﬁt algorithm reduces the amount of power consumed and increases system performance based on effective scheduling.

关键词： Randomﬁt algorithm network on chips processor cores power-aware optimization

Comprehensive Review and Analysis of Two-element Resonant Compensation Topologies for Wireless Inductive Power Transfer Systems

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Chinese Journal of Electrical Engineering 2019年第2期5卷 14-31页

作者： k.N.Mude k.Aditya Systec R&D PortoPortugal University Ontario Institute of Technology OShawaCanada

Wireless power transfer(WPT)is gaining much attention for battery charging of electric vehicles(EVs).Resonant WPT systems play a crucial role in achieving efficient power transfer from source to *** overview of two-element resonant compensation techniques and their characteristics under various operating conditions are *** the converter and control strategies used for different topologies are *** behavior of the performance factors are evaluated against the operating conditions and compared for the different topologies.

关键词： Resonant wireless power transfer compensation topologies power converters battery charging

Image Manipulation Detection Through Laterally Linked Pixels and kernel Algorithms

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Computer Systems Science & Engineering 2022年第4期41卷 357-371页

作者： k.k.Thyagharajan G.Nirmala RMD Engineering College KavaraipettaiChennaiIndia

In this paper,copy-move forgery in image is detected for single image with multiple manipulations such as blurring,noise addition,gray scale conver-sion,brightness modiﬁcations,rotation,Hu adjustment,color adjustment,contrast changes and JPEG ***,traditional algorithms detect only copy-move attacks in image and never for different manipulation in single *** proposed LLP(Laterally linked pixel)algorithm has two dimensional arrays and single layer is obtained through unit linking pulsed neural network for detec-tion of copied region and kernel tricks is applied for detection of multiple manip-ulations in single forged *** algorithm consists of two channels such as feeding component(F-Channel)and linking component(L channel)for linking *** algorithm linking pixels detects image with multiple manipulation and copy-move forgery due to one-to-one correspondence between pixel and neu-ron,where each pixel’s intensity is taken as input for F channel of neuron and connected for forgery identiﬁ***,neuron is connected with neighboringﬁeld of neuron by L channel for detecting forged images with multi-ple manipulations in the image along with copy-move,through kernel trick clas-siﬁer(kTC).From experimental results,proposed LLP algorithm performs better than traditional algorithms for multiple manipulated copy and paste *** accuracy obtained through LLP algorithm is about 90%and further forgery detec-tion is improved based on optimized kernel selections in classiﬁcation algorithm.

关键词： Machine learning copy move forgery support vectors kernel feature extraction

Nitrous Oxide Emissions from Fields with Different Wheat and Rice Varieties

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Pedosphere 2012年第1期22卷 112-121页

作者： B.GOGOI k.k.BARUAH Department of Environmental Science Tezpur University

Plant species of cropping systems may affect nitrous oxide （N2O） emissions. A field experiment was conducted to investigate dynamics of N2O emissions from rice-wheat fields from December 2006 to June 2007 and the relationships of soil and plant parameters with N2O emissions. The results indicated that N2O emissions from different wheat varieties ranged front 12 to 291 Ixg N2O-N m-2 h 1 and seasonal N2O emissions ranged from 312 to 385 mg N2O-N m -2 In the rice season, it was from 11 to 154 μg N2O-N m-2 h-1 with seasonal N2O emission of 190-216 mg N2O-N m-2. The seasonal integrated flux of N2O differed significantly among wheat and rice varieties showed higher seasonal N2O emissions. In the wheat season, N2O The wheat variety HUW 234 and rice variety Joymoti emissions correlated with soil organic carbon （SOC）, soil NO3-N, soil temperature, shoot dry weight, and root dry weight. Among the variables assessed, soil temperature followed by SOC and soil NO3-N were considered as the important variables influencing N2O emission. N2O emission in the rice season was significantly correlated with SOC, soil NO3-N, soil temperature, leaf area, shoot dry weight, and root dry weight. The main driving forces influencing N2O emission in the rice season were soil NO3-N, leaf area, and SOC.

关键词： nitrous oxide flux plant characteristics rice field soil factors wheat field

GaN based transfer electron and avalanche transit time devices

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Journal of Semiconductors 2012年第5期33卷 32-37页

作者： R.k.Parida A.k.Panda ITER Siksha‘O’Anusandhan University National Institute of Science and Technology

A new model is developed to study the microwave/mm wave characteristics of two-terminal GaNbased transfer electron devices（TEDs）,namely a Gunn diode and an impact avalanche transit time（IMPATT） *** characteristics such as device efficiency and the microwave power generated are computed and compared at D-band（140 GHz center frequency） to see the potentiality of each device under the same operating *** is seen that GaN-based IMPATT devices surpass the Gunn diode in the said frequency region.

关键词： GaN transfer electron device avalanche transit time device

Effect of dysprosium substitution on structural and dielectric properties of BiFeO_3-PbTiO_3 multiferroic composites

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Journal of Rare Earths 2015年第6期33卷 639-646页

作者： N.k.Mohanty A.k.Behera S.k.Satpathy Banarji Behera P.Nayak Materials Research Laboratory School of Physics Sambalpur University

0.5BiDyxFe1-xO3-0.5PbTiOa（0.5BDxF1-x-0.5PT）（x=0.00, 0.05, 0.10, 0.15, 0.20） multiferroic composites were pre- pared by conventional solid state reaction method. Structural characterization was performed by X-ray diffraction and the mate- rials showed tetragonal structure at room temperature. Surface morphology of the composites was studied by a scanning electron microscope （SEM）. Frequency and temperature dependence of dielectric constant （er） and dielectric loss （tan~） of 0.5BDxF1_x- 0.5PT were measured in a wide range of frequency （100 Hz to 1 MHz） and temperature （25 to 400 ~C）. The analysis of the study showed that the er and tang decreased with increasing frequency in the given range for all the samples which could be explained through the occurrence of dipole relaxation process. The effect of substitution of rare earth element dysprosium （Dy） showed increase in er in all the samples prepared for different concentrations from 0.00 to 0.20. An explanation for high value of er for Dy modified 0.5BiFeO3-0.5PbTiO3 （0.5BF-0.5PT） compared to Gd modified 0.5BF-0.5PT was provided. The variation of AC conductivity with inverse temperature found to obey the Arrhenius equation and the composites showed negative temperature coefficient of resistance （NTCR） behavior. The activation energy was found to be in the range from 0.25 to 0.40 eV for all the studied samples.

关键词： X-ray diffraction dielectric constant tangent loss activation energy rare earths