检索结果-南通市图书馆

Journal of Semiconductors 2017年第12期38卷 13-21页

作者： Neeraj jain Balwinder Raj VLSI Design Lab Department of Electronics and Communication EngineeringDr.B.R.Ambedkar National Institute of Technology(NIT)JalandharIndia

Continued scaling of CMOS technology to achieve high performance and low power consumption of semiconductor devices in the complex integrated circuits faces the degradation in terms of electrostatic integrity, short channel effects （SCEs）, leakage currents, device variability and reliability etc. Nowadays, multigate structure has become the promising candidate to overcome these problems. SO1 FinFET is one of the best multigate structures that has gained importance in all electronic design automation （EDA） industries due to its improved short channel effects （SCEs）, because of its more effective gate-controlling capabilities. In this paper, our aim is to ex- plore the sensitivity of underlap spacer region variation on the performance of SOI FinFET at 20 nm channel length. Electric field modulation is analyzed with spacer length variation and electrostatic performance is evalu- ated in terms of performance parameter like electron mobility, electric field, electric potential, sub-threshold slope （SS）, ON current （Ion）, OFF current （/off） and Ion/loll ratio. The potential benefits of SOl FinFET at drain-to-source voltage, liDS = 0.05 V and VDS = 0.7 V towards analog and RF design is also evaluated in terms of intrinsic gain （Av）, output conductance （go）, trans-conductance （gin）, gate capacitance （Cgg）, and cut-off frequency OCT = gm/2πCgg） with spacer region variations.

关键词： SOI FinFET SCEs underlap region DIBL analog and RF performance

Modelling and analysis of FMS productivity variables by ISM, SEM and GTMA approach

在线全文

学校读者我要写书评

暂无评论

Frontiers of Mechanical Engineering 2014年第3期9卷 218-232页

作者： Vineet jain Tilak RAJ Department of Mechanical Engineering Amity University HaryanaGurgaon 122413 India Department of Mechanical Engineering YMCA University of Scienceand Technology Faridabad 121006 India

Productivity has often been cited as a key factor in a flexible manufacturing system （FMS） perfor- mance, and actions to increase it are said to improve profitability and the wage earning capacity of employees. Improving productivity is seen as a key issue for survival and success in the long term of a manufacturing system. The purpose of this paper is to make a model and analysis of the productivity variables of FMS. This study was performed by different approaches viz. interpretive structural modelling （ISM）, structural equation modelling （SEM）, graph theory and matrix approach （GTMA） and a cross-sectional survey within manufacturing firms in India. ISM has been used to develop a model of productivity variables, and then it has been analyzed. Exploratory factor analysis （EFA） and confirmatory factor analysis （CFA） are powerful statistical techniques. CFA is carried by SEM. EFA is applied to extract the factors in FMS by the statistical package for social sciences （SPSS 20） software and confirming these factors by CFA through analysis of moment structures （AMOS 20） software. The twenty productivity variables are identified through literature and four factors extracted, which involves the productivity of FMS. The four factors are people, quality, machine and flexibility. SEM using AMOS 20 was used to perform the first order four-factor structures. GTMA is a multiple attribute decision making （MADM） methodology used to find intensity/quantification of productivity variables in an organization. The FMS productivity index has purposed to intensify the factors which affect FMS.

关键词： FMS ISM EFA SEM GTMA

Safe laparoscopic cholecystectomy:Adoption of universal culture of safety in cholecystectomy

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

World Journal of Gastrointestinal Surgery 2019年第2期11卷 62-84页

作者： Vishal Gupta Gaurav jain Department of Surgical Gastroenterology Shatabdi Hospital Phase 1 King George’s Medical University Transplant and HPB Surgery the Iowa Clinic-Iowa Methodist Hospital

The incidence of biliary injury after laparoscopic cholecystectomy(LC) has shown a declining trend though it may still be twice that as with open cholecystectomy. Major biliary or vasculobiliary injury is associated with significant morbidity. As prevention is the best strategy, the concept of a culture of safe cholecystectomy has been recently introduced to educate surgeons and apprise them of basic tenets of safe performance of LC. Various aspects of safe cholecystectomy include:(1) thorough knowledge of relevant anatomy, various anatomical landmarks, and anatomical variations;(2) an understanding of the mechanisms involved in biliary/vascular injury, the most important being the misidentification injury;(3) identification of various preoperative and intraoperative predictors of difficult cholecystectomy;(4) proper gallbladder retraction;(5) safe use of various energy devices;(6) understanding the critical view of safety, including its doublet view and documentation;(7) awareness of various error traps(e.g., fundus first technique);(8) use of various bailout strategies(e.g., subtotal cholecystectomy) in difficult gallbladder cases;(9) use of intraoperative imaging techniques(e.g., intraoperative cholangiogram) to ascertain correct anatomy; and(10) understanding the concept of *** should be facile with these aspects of this culture of safety in cholecystectomy in an attempt to reduce the incidence of biliary/vascular injury during LC.

关键词： Bile leak Bile duct injury Cholecystectomy Cholelithiasis Cholecystitis

Microstructure transformations and improving wear resistance of austenitic stainless steel additively fabricated by arc-based DED process

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Defence Technology（防务技术） 2024年第8期38卷 194-204页

作者： Ashish Yadav Manu Srivastava Prashant K.jain Sandeep Rathee Hybrid Additive Manufacturing Laboratory Mechanical Engineering DepartmentPDPM Indian Institute of Information TechnologyDesign&ManufacturingJabalpur482005Madhya PradeshIndia FFF Laboratory Mechanical Engineering DepartmentPDPM Indian Institute of Information TechnologyDesign&ManufacturingJabalpur482005Madhya PradeshIndia Department of Mechanical Engineering National Institute of TechnologySrinagarIndia

In this study, austenitic stainless steel(ASS) was additively fabricated by an arc-based direct energy deposition(DED) technique. Macrostructure, microstructure, mechanical characteristics at different spatial orientations(0°, 90°, and 45°), and wear characteristics were evaluated at the deposited structure top, middle, and bottom regions. Results show that austenite(γ) and delta-ferrite(δ) phases make up most of the microstructure of additively fabricated SS316LSi steel. Within γ matrix, δ phase is dispersed both(within and along) grain boundaries, exhibiting a fine vermicular morphology. The bottom, middle,and top regions of WAAM deposited ASS exhibit similar values to those of wrought SS316L in the tensile and impact test findings. Notably, a drop in hardness values is observed as build height increases. During SEM examinations of fractured surfaces from tensile specimen, closed dimples were observed, indicating good ductility of as-built structure. Wear test findings show signs of mild oxidation and usual adhesive wear. By depositing a mechanically mixed composite layer, an increase in the oxidation percentage was discovered to facilitate healing of worn surfaces. The findings of this study will help in design, production and renovation of products/components that are prone to wear. WAAM-deposited ASS has remarkable strength and ability to withstand impacts;it can be used in the production of armour plates for defence applications, mainly military vehicles and aircraft.

关键词： Metal additive deposition Defence applications Arc-based DED Characterization Wear behaviour Fractography

Elastoplastic analysis of AA7075-O aluminum sheet by hybrid micro-scale representative volume element modeling with really-distributed particles and in-situ SEM experimental testing

在线全文

学校读者我要写书评

暂无评论

Journal of Materials Science & Technology 2022年第28期123卷 201-221页

作者： Qingping Sun Shahryar Asqardoust Abhishek Sarmah Mukesh K.jain College of Aerospace and Civil Engineering Harbin Engineering UniversityHarbin 150001China Department of Mechanical Engineering McMaster UniversityHamiltonON L8S4L7Canada

This paper addresses the challenge of reconstructing randomly distributed second-phase particlestrengthened microstructure of AA7075-O aluminum sheet material for computational *** particle characteristics in 3D space were obtained from focused ion beam and scanning electron microscopy(FIB-SEM)and SEM-based Electron Backscatter Diffraction/Energy Dispersive X-ray Spectrometry(EBSD/EDS)techniques.A theoretical framework for analysis of elastic-plastic deformation of such3D microstructures is ***-induced shear band formation,void initiation,growth and linkage at large plastic strains during uniaxial tensile loading were investigated based on reconstructed 3D representative volume element(RVE)models with real-distribution of particles and the results compared with experimental ***-situ SEM interrupted tension tests along transverse direction(TD)and rolling direction(RD),employing microscopic-digital image correlation(μ-DIC)technique,were carried out to investigate slip bands,micro-voids formation and obtain microstructural strain *** resulting local strain maps were analyzed in relation to the experimentally observed plastic flow localization,failure modes and local stress maps from simulations of RVE *** influences of particle size,shape,orientation,volume fraction as well as matrix-particle interface properties on local plastic deformation,global stress-strain/strain-hardening curves and interfacial failure mechanisms were studied based on 3D RVE *** possible,the model results were compared with in-situ tensile test *** general,good agreement was observed,indicating that the real 3D microstructure-based RVE models can accurately predict the plastic deformation and interfacial failure evolution in AA7075-O aluminum sheet.

关键词： Representative volume element AA7075-O aluminum sheet In-situ SEM Microscopic-digital image correlation(μ-DIC) Elastoplastic behavior

Organorhenium(Ⅶ) oxides

在线全文

学校读者我要写书评

暂无评论

Rare Metals 2006年第z1期25卷 411-421页

作者： KüHN Fritz E. jain Kavita R. Department für Chemie der Technischen Universitt München Lichtenbergstrasse 4 D-85747 Garching bei München Germany

Methyltrioxorhenium (MTO) and its derivatives were utilized as catalysts for a broad variety of organic reactions after the discovery of an easy synthetic access way to this class of compounds. Among the numerous characterization techniques, 17O-NMR spectroscopy and vibrational spectroscopy were exemplary discussed. The immobilization of MTO and its derivatives is of significant current interest as is the synthesis of chiral derivatives.

关键词： catalysis epoxidation immobilization olefination rhenium

HIOC:a hybrid imputation method to predict missing values in medical datasets

在线全文

学校读者我要写书评

暂无评论

International Journal of Intelligent Computing and Cybernetics 2021年第4期14卷 598-616页

作者： Pooja Rani Rajneesh Kumar Anurag jain MMEC Maharishi Markandeshwar(Deemed to be University)MullanaIndia and MMICT&BMMaharishi Markandeshwar(Deemed to be University)MullanaIndia CSE MMECMaharishi Markandeshwar(Deemed to be University)MullanaIndiaand Virtualization Department School of Computer ScienceUniversity of Petroleum and Energy StudiesDehradunIndia

Purpose-Decision support systems developed using machine learning classifiers have become a valuable tool in predicting various ***,the performance of these systems is adversely affected by the missing values in medical *** methods are used to predict these missing *** this paper,a new imputation method called hybrid imputation optimized by the classifier(HIOC)is proposed to predict missing values ***/methodology/approach-The proposed HIOC is developed by using a classifier to combine multivariate imputation by chained equations(MICE),K nearest neighbor(KNN),mean and mode imputation methods in an optimum *** of HIOC has been compared to MICE,KNN,and mean and mode *** classifiers support vector machine(SVM),naive Bayes(NB),random forest(RF)and decision tree(DT)have been used to evaluate the performance of imputation ***-The results show that HIOC performed efficiently even with a high rate of missing *** had reduced root mean square error(RMSE)up to 17.32%in the heart disease dataset and 34.73%in the breast cancer *** prediction of missing values improved the accuracy of the classifiers in predicting *** increased classification accuracy up to 18.61%in the heart disease dataset and 6.20%in the breast cancer ***/value-The proposed HIOC is a new hybrid imputation method that can efficiently predict missing values in any medical dataset.

关键词： Imputation methods Multivariate imputation by chained equations KNN imputation Mode imputation Mean imputation Hybrid imputation

Optimized Tuning of LOADng Routing Protocol Parameters for IoT

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Computer Systems Science & Engineering 2023年第8期46卷 1549-1561页

作者： Divya Sharma Sanjay jain Vivek Maik Department of Electronics and Communication New Horizon College of EngineeringBengaluru560103India CMR Institute of Technology Bengaluru560037India Department of Electronics and Communication SRM Institute of Science and TechnologyKattankulathurChennai603203India

Interconnected devices and intelligent applications have slashed human intervention in the Internet of Things(IoT),making it possible to accomplish tasks with less human ***,it faces many problems,including lower capacity links,energy utilization,enhancement of resources and limited resources due to its openness,heterogeneity,limited resources and *** is challenging to route packets in such a constrained *** an IoT network constrained by limited resources,minimal routing control overhead is required without packet *** constrained environments can be improved through the optimal routing *** is challenging to route packets in such a constrained ***,this work is motivated to present an efficient routing protocol for enhancing the lifetime of the IoT *** On-demand Ad hoc Distance-vector Routing Protocol—Next Generation(LOADng)protocol is an extended version of the Ad Hoc On-Demand Distance Vector(AODV)*** AODV,LOADng is a lighter version that forbids the intermediate nodes on the route to send a route reply(RREP)for the route request(RREQ),which originated from the source.A resource-constrained IoT network demands minimal routing control overhead and faster packet ***,in this paper,the parameters of the LOADng routing protocol are optimized using the black widow optimization(BWO)algorithm to reduce the control overhead and ***,the performance of the proposed model is analyzed with the default LOADng in terms of delay,delivery ratio and *** results show that the LOADng-BWO protocol outperforms the conventional LOADng protocol.

关键词： Internet of things optimization algorithm routing protocol LOADng

Effects of multiple subcavities with floor subcavity in supersonic cavity flow

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Propulsion and Power Research 2023年第1期12卷 114-137页

作者： Priyansh jain Anbarasan Sekar Aravind Vaidyanathan Indian Institute of Space Science and Technology ThiruvananthapuramKerala 695547India

Experimental and computational analysis has been carried out by many researchers on supersonic cavity flow,but detailed analysis based on Rossiter’s model still requires some *** the current study an open rectangular cavity with a length to depth ratio of 2(L/D=2)and Mach number at the inlet as 1.71,was considered as a baseline configuration for experimental *** techniques such as power spectral density(PSD),correlation,and overall sound pressure level(OASPL)were carried out on the unsteady pressure data,to analyze the aero-acoustic flow ***-speed schlieren images were processed to obtain spatially coherent modes by proper orthogonal decomposition(POD).The analysis was extended for different dimensions of subcavities on the aft,floor,and front *** detailed analysis of these configurations with different dimensions and combinations revealed the various flow features and mode frequencies in supersonic *** the front wall subcavity act as a passive control device,reducing the overall sound pressure level inside the cavity whereas,the aft wall subcavity acts as a passive resonator with distinct harmonic fluidresonant modes,a similar phenomenon was observed for floor subcavity at different locations.A novel method was employed to analyze Rossiter’s model and its applicability in estimating experimental modes was verified,as it accurately predicted the dominant frequencies with a maximum of 2.74% uncertainty among all the configurations.

关键词： Supersonic cavity flow Fast Fourier transform High speed schlieren Proper orthogonal decomposition Rossiter’s feedback mechanism

THE EFFECT OF MAGNETIC FIELDS ON LOW FREQUENCY OSCILLATING NATURAL CONVECTION WITH PRESSURE GRADIENT

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Applied Mathematics and Mechanics(English Edition) 2003年第3期24卷 274-283页

作者： G.C.Sharma Madhu jain Mahesh Chandra School of Mathematical Sciences Institute of Basic ScienceSchool of Mathematical SciencesInstitute of Basic ScienceSchool of Mathematical SciencesInstitute of Basic Science KhandariAgra-282002IndiaKhandariAgra-282002IndiaKhandariAgra-282002India

The oscillating natural convection in the presence of transverse magnetic field with time depending pressure gradient is studied. The analysis of the problem is carried out by assuming that the fluid is flowing in a parallel plate configuration. The emphasis is on low frequency oscillating convective flows induced by g-jitter associated with micro gravity because of their importance to the space processing materials. A general solution for an oscillating flow in the presence of transverse magnetic field is carried out. Some special cases of the oscillating flow and its response to an applied magnetic field are performed. It was observed that the behavior of oscillating free convective flows depends on frequency, amplitude of the driving buoyancy forces, temperature gradient,magnetic field and the electric conditions of the channel walls. In the absence of magnetic field, buoyancy force plays a predominant role in driving the oscillatory flow pattern, and velocity magnitude is also affected by temperature gradients. To suppress the oscillating flow external magnetic field can be used. It is also found that the reduction of the velocity is inversely proportional to the square of the applied magnetic field with conducting wall but directly proportional to the inverse of the magnetic field with insulating wall. Detailed calculations and computational results are also carried out to depict the real situation.

关键词： convection g- jitter acceleration buoyancy force magnetic field pressure gradient