检索结果-南通市图书馆

Contrast Enhancement Based Image Detection Using Edge Preserved Key Pixel Point Filtering

Computer Systems Science & Engineering 2022年第8期42卷 423-438页

作者： Balakrishnan natarajan Pushpalatha Krishnan Department of Master of Computer Applications Sona College of TechnologySalem–636005India Department of Computer Applications SRM Institute of Science and TechnologyRamapuramChennai600089India

In existing methods for segmented images,either edge point extraction or preservation of edges,compromising contrast images is so sensitive to *** Degeneration Threshold Image Detection(DTID)framework has been proposed to improve the contrast of edge filtered ***,DTID uses a Rapid Bilateral Filtering process for filtering edges of contrast *** filter decomposes input images into base layers in the DTID *** minimal filtering time,Rapid Bilateral Filtering handles high dynamic contrast images for smoothening edge *** the DTID framework,Rapid Bilateral Filtering with Shift-Invariant Base Pass Domain Filter is insensitive to *** Shift-Invariant Filtering estimates value across edges for removing outliers(i.e.,noise preserving base layers of the contrast image).The intensity values are calculated in the base layer of the contrast image for accurately detecting nearby spatial locations using Shift-Invariant base Pass Domain Filter(SIDF).At last,Affine Planar Transformation is applied to detect edge filtered contrast images in the DTID framework for attaining a high quality of the *** normalizes the translation and rotation of *** this,Degeneration Threshold Image Detection maximizes average contrast enhancement quality and performs an experimental evaluation of factors such as detection accuracy,rate,and filtering time on contrast *** analysis shows that the DTID framework reduces the filtering time taken on contrast images by 54%and improves average contrast enhancement quality by 27%compared to GUMA,HMRF,SWT,and *** provides better performance on the enhancement of average contrast enhancement quality by 28%,detection accuracy rate by 26%,and reduction in filtering time taken on contrast images by 30%compared to state-of-art methods.

关键词： Rapid bilateral filtering edge preserved filtering affine planar transformation key pixel point localization shift-invariant base pass domain filter

来源：

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

Soil protists: An untapped microbial resource of agriculture and environmental importance

引用

Pedosphere 2022年第1期32卷 184-197页

作者： Komal A.CHANDARANA natarajan AMARESAN C.G.Bhakta Institute of Biotechnology Uka Tarsadia UniversityMaliba CampusBardoliSurat 394350India

Protists are essential components of soil biodiversity and ecosystem functioning. They play a vital role in the microbial food web as consumers of bacteria, fungi, and other small eukaryotes and are also involved in maintaining soil fertility and plant productivity. Protists also contribute to regulating and shaping the bacterial community in terrestrial ecosystems via specific prey spectra. They play a role in plant growth promotion and plant health improvement,mostly via nutrient cycling, grazing, and the activation of bacterial genes required for plant growth and phytopathogen suppression. Thus, protists may prove to be a useful inoculant as biofertilizer and biocontrol agent. They can also be applied as model organisms as bioindicators of soil health. Despite their usefulness and essentiality, they are often forgotten and under-researched components of the soil microbiome, as most of our research focuses on bacteria and fungi. In this review, we provide an overview of the role of protists in plant productivity and plant health management and in shifts in soil bacterial community composition, as well as their roles as bioindicator. We also discuss the perspectives of knowledge gaps and future prospects to further improve soil *** research in soil protistology will provide insights into sustainable agriculture and environmental health alongside the study of bacteria and fungi.

关键词： bacterial community bioindicator microbial food web plant health plant productivity soil biodiversity soil health soil microbiome

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Silver nanoparticles tolerant bacteria from sewage environment

引用

Journal of Environmental Sciences 2011年第2期23卷 346-352页

作者： Sudheer Khan Amitava Mukherjee natarajan Chandrasekaran Nanobio-Medicine Laboratory School of Bio-Sciences and TechnologyVIT University

Silver nanoparticle （SNP） is a threat to soil, water and human health. Protection of environment from silver nanoparticles is a major concern. A sewage isolate, Bacillus pumilus treated with SNPs showed similar growth kinetics to that without nanoparticles. A reduction in the amount of exopolysaccharides was observed after SNPs - B. pumilus culture supernatant interaction. The Fourier transform infrared spectroscopy （FT-IR） peaks for the exopolysaccharides extracted from the bacterial culture supernatant and＇the interacted SNPs were almost similar. The exopolysaccharide capping of the SNPs was confirmed by UV-Visible, FT-IR and X-ray diffraction analysis. The study of bacterial exopolysaccharides capped SNPs with E. coli, S. aureus and M. luteus showed less toxicity compared to uncoated SNPs. Our studies suggested that the capping of nanopartieles by bacterially produced exopolysaccharides serve as the probable mechanism of tolerance.

关键词： Bacillus pumilus silver nanoparticles exopolysaccharides encapsulation bacterial tolerance toxicity reduction

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

A FEniCS implementation of the phase field method for quasi-static brittle fracture

引用

Frontiers of Structural and Civil Engineering 2019年第2期13卷 380-396页

作者： HIRSHIKESH Sundararajan natarajan Ratna Kumar ANNABATTULA Integrated Modeling and Simulation Lab Department of Mechanical EngineeringIndian Institute of Technology MadrasChennai- 600036India

In the recent years, the phase field method for simulating fracture problems has received considerable attention. This is due to the salient features of the method: 1) it can be incorporated into any conventional finite element software;2) has a scalar damage variable is used to represent the discontinuous surface implicitly and 3) the crack initiation and subsequent propagation and branching are treated with less complexity. Within this framework, the linear momentum equations are coupled with the diffusion type equation, which describes the evolution of the damage variable. The coupled nonlinear system of partial differential equations are solved in a 'staggered? approach. The present work discusses the implementation of the phase field method for brittle fracture within the open-source finite element software, FEniCS. The FEniCS provides a framework for the automated solutions of the partial differential equations. The details of the implementation which forms the core of the analysis are presented. The implementation is validated by solving a few benchmark problems and comparing the results with the open literature.

关键词： phase field method FEniCS brittle fracture crack propagation variational theory of fracture

来源：

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

Should we recycle the graphite from spent lithium-ion batteries?The untold story of graphite with the importance of recycling

引用

Journal of Energy Chemistry 2022年第8期31卷 351-369,I0010页

作者： Subramanian natarajan Madhusoodhanan Lathika Divya Vanchiappan Aravindan Department of Chemistry Indian Institute of Science Education and Research(IISER)

Demand for graphite in the forthcoming years to develop Li-ion batteries(LIBs)with the goal of driving electric vehicles(EV)and its requirement in multifarious energy storage applications as an *** emerging sector of LIB-based EVs,along with portable electronics,produces an inevitable volume of batteries in the e-waste *** main reason for the lower percentage of recycling(at present,<5%)is due to the recovery of economically rich metals like Li,Ni,and ***,complete recycling technologies,including the strategic material graphite,which is available in a massive amount of spent LIBs,are urgently needed to be updated to ensure the reuse of all *** approach lifts the recycling process to develop an economic one besides the geostrategic and environmental policy ***,we summarize the importance of graphite and its demand and specify the reasons to recycle the graphite from spent LIBs along with its development as an anode in ***,the approach of the current recycling process of graphite in lab-scale and industries for various applications,including energy storage,are discussed with the highlights of future progress.

关键词： Recycling Lithium-ion batteries Graphite Anode Capacitor

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Adaptive phase field modelling of crack propagation in orthotropic functionally graded materials

引用

Defence Technology（防务技术） 2021年第1期17卷 185-195页

作者： Hirshikesh Emilio Martínez-Paneda Sundararajan natarajan Department of Mechanical Engineering Indian Institute of Technology MadrasChennai600036India Department of Civil and Environmental Engineering Imperial College LondonLondonSW72AZUK

In this work,we extend the recently proposed adaptive phase field method to model fracture in orthotropic functionally graded materials(FGMs).A recovery type error indicator combined with quadtree decomposition is employed for adaptive mesh *** proposed approach is capable of capturing the fracture process with a localized mesh refinement that provides notable gains in computational *** implementation is validated against experimental data and other numerical experiments on orthotropic materials with different material *** results reveal an increase in the stiffness and the maximum force with increasing material orientation *** study is then extended to the analysis of orthotropic *** is observed that,if the gradation in fracture properties is neglected,the material gradient plays a secondary role,with the fracture behaviour being dominated by the orthotropy of the ***,when the toughness increases along the crack propagation path,a substantial gain in fracture resistance is observed.

关键词： Functionally graded materials Phase field fracture Polygonal finite element method Orthotropic materials Recovery based error indicator

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Readily available alkylbenzenes as precursors for the one-pot preparation of buta-1,3-dienes under DDQ visible-light photocatalysis in benzotrifluoride

引用

Organic Chemistry Frontiers 2022年第5期9卷 1395-1402页

作者： Palani natarajan Deachen Chuskit Priya Department of Chemistry&Centre for Advanced Studies in Chemistry Panjab UniversityChandigarh-160014India

Easily accessible alkylbenzenes are highly valuable starting materials and solvents in synthetic organic chemistry for the production of pharmaceuticals,plastics,synthetic rubber,dyes,etc.

关键词： alkyl visible rubber

来源：

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

Smart Fraud Detection in E-Transactions Using Synthetic Minority Oversampling and Binary Harris Hawks Optimization

引用

Computers, Materials & Continua 2023年第5期75卷 3171-3187页

作者： Chandana Gouri Tekkali Karthika natarajan School of Computer Science and Engineering VIT-AP University522237Andhra PradeshIndia

Fraud Transactions are haunting the economy of many individuals with several factors across the *** research focuses on developing a mechanism by integrating various optimized machine-learning algorithms to ensure the security and integrity of digital *** research proposes a novel methodology through three ***,Synthetic Minority Oversampling Technique(SMOTE)is applied to get balanced ***,SMOTE is fed to the nature-inspired Meta Heuristic(MH)algorithm,namely Binary Harris Hawks Optimization(BinHHO),Binary Aquila Optimization(BAO),and Binary Grey Wolf Optimization(BGWO),for feature *** has performed well when compared with the other ***,features from BinHHO are fed to the supervised learning algorithms to classify the transactions such as fraud and *** efficiency of BinHHO is analyzed with other popular MH *** BinHHO has achieved the highest accuracy of 99.95%and demonstrates amore significant positive effect on the performance of the proposed model.

关键词： Metaheuristic algorithms K-nearest-neighbour binary aquila optimization binary grey wolf optimization BinHHO optimization support vector machine

来源：

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

Small molecule induced polymerization of BCL6 facilitates SIAH1 mediated degradation

引用

Signal Transduction and Targeted Therapy 2021年第5期6卷 1391-1392页

作者： Sandeep Rana Amarnath natarajan Division of Predinical Innovation National Center for Advancing Translational SciencesNational Institutes of HealthRockvilleMDUSA Eppley Institute for Cancer Research Fred&Pamela Buffett Cancer CenterUniversity of Nebraska Medical CenterOmahaNEUSA

The recent report by Slabicki et *** Nature used an array of techniques including cryo-electron microscopy to elucidate the mechanism of action of BI-3802,a molecular glue.1 The discovery of small molecules that highjack cellular quality control machinery to selectively degrade proteins has generated considerable excitement in the drug discovery community,particularly toward targets often deemed"undruggable".Whether its proteolysis targeting chimeras(PROTACs),consisting of heterobifunctional molecules connected by a linker that facilitates the recruitment of an E3 ligase to the protein of interest(POI)or small molecules that function as molecular glues2 to induce a novel interaction between an E3 ligase and the POI,the ultimate goal is to tag the POI for destruction in *** design is relatively straight forward,wherein a POI binding small molecule,and an E3 ligase binding ligand are connected through a linker that enables stable ternary complex formation(POI:PROTAC:E3 ligase)followed by POI degradation.

关键词： POI connected straight

来源：

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

Studies on thermally grown oxide as an interface between plasma-sprayed coatings and a nickel-based superalloy substrate

引用

矿物冶金与材料学报：英文版 2017年第6期24卷 681-690页

作者： Adam Khan Mahaboob Basha Sundarrajan Srinivasan natarajan Srinivasan Department of Mechanical Engineering Centre for Surface Engineering Kalasalingam University Krishnankoil 626126 Tamil Nadu India Department of Metallurgical and Materials Engineering National Institute of Technology Tiruchirapalli 620015 Tamil Nadu India Centre of Excellence in Corrosion and Surface Engineering (CECASE) National Institute of Technology Tiruchirapalli 620015 Tamil Nadu India

A thermally grown oxide layer formed by hot corrosion was investigated as an interface between plasma-sprayed coatings and a nickel-based superalloy substrate. The hot corrosion mechanism of NiCr–Cr_2O_3 and Al_2O_3–40wt% TiO_2(A40T) plasma coated Inconel 617 was evaluated. The experiments were carried out at 1000°C using a combination of Na_2SO_4, NaCl, and V_2O_5 salts to simulate the conditions of a gas turbine in a marine environment. The hot corrosion results revealed the spallation and dissolution of oxides upon prolonged exposure. Optical images and scanning electron micrographs of the exposed samples revealed the formation of oxide scale and provided details of its morphology in NiCr–Cr_2O_3 coated samples. Microstructure characterization of A40T coatings demonstrated a thermally grown oxide(TGO) layer at 1000°C. Increasing the thickness of the TGO layer decreased the corrosion resistance. The elemental analysis and image mapping revealed the migration of active elements from the substrate and coatings toward the corrosive environment.

关键词： corrosion coatings superalloy oxides

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：