检索结果-南通市图书馆

On Bounded Variation Functions by General MKZD Operators

在线全文

学校读者我要写书评

暂无评论

Acta Mathematica Sinica,English Series 2007年第8期23卷 1457-1462页

作者： vijay GUPTA School of Applied Sciences Netaji Subhas Institute of TechnologyAzad Hind Fauj MarySector 3 Dwarka New Delhi-110075India

in this paper, we study the rate of convergence for functions of bounded variation for the recently introduced Bzier variant of the Meyer-Knig-Zeller-Durrmeyer operators.

关键词： approximation by positive operators rate of convergence degree of approximation functions of bounded variation total variation

Effect of calcium lactate on compressive strength and self-healing of cracks in microbial concrete

在线全文

学校读者我要写书评

暂无评论

Frontiers of Structural and Civil Engineering 2019年第3期13卷 515-525页

作者： Kunamineni vijay Meena MURMU Department of Civil Engineering National Institute of TechnologyRaipur 492010India

This paper presents the effect on compressive strength and self-healing capability of bacterial concrete with the addition of calcium *** to normal concrete,bacterial concrete possesses higher durability and engineering concrete *** production of calcium carbonate in bacterial concrete is limited to the calcium content in *** calcium lactate is externally added to be an additional source of calcium in the *** influence of this addition on compressive strength,self-healing capability of cracks is highlighted in this *** bacterium used in the study is bacillus subtilis and was added to both spore powder form and culture form to the *** subtilis spore powder of 2 million cfu/g concentration with 0.5%cement was mixed to *** lactates with concentrations of 0.5%,1.0%,1.5%,2.0%,and 2.5%of cement,was added to the concrete mixes to test the effect on properties of *** other samples,cultured bacillus subtilis with a concentration of 1×10^cells/mL was mixed with concrete,to study the effect of bacteria in the cultured form on the properties of *** of 100 mm×100 mm×100 mm were used for the *** cubes were tested after a curing period of 7,14,and 28 d.A maximum of 12%increase in compressive strength was observed with the addition of 0.5%of calcium lactate in *** electron microscope and energy dispersive X-ray spectroscopy examination showed the formation of ettringite in pores;calcium silicate hydrates and calcite which made the concrete denser.A statistical technique was applied to analyze the experimental data of the compressive strengths of cementations *** surface methodology was adopted for optimizing the experimental *** regression equation was yielded by the application of response surface methodology relating response variables to input *** method aids in predicting the experimental results accurately with an acceptable range

关键词： calcium lactate bacillus subtilis compressive strength self-healing of cracks

Processing and design methodologies for advanced and novel thermal barrier coatings for engineering applications

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Particuology 2016年第4期14卷 1-28页

作者： vijay Kumar Balasubramanian Kandasubramanian Department of Materials Engineering Defence Institute of Advanced Technology Girinagar Pune 411025 India

Thermal barrier coating is a crucial thermal insulation technology that enables the underlying substrate to operate near or above its melting temperature. Such coatings bolster engineers＇ perpetual desire to increase the power and efficiency of gas turbine engines through increasing the turbine inlet tempera- ture. Advances in recent years have made them suitable for wider engineering and defense applications, and hence they are currently attracting considerable attention. A thermal barrier coating system is itself dynamic; its components undergo recurrent changes in their composition, microstructure and crystalline phases during its service life. Nevertheless, the performance of multi-layered and multi-material sys- tems tailored for high temperature applications is closely linked to the deposition process. The process improvements achieved so far are the outcome of increased understanding of the relationship between the coating morphology and the operating service conditions, as well as developments in characterization techniques. This article presents a comprehensive review of various processing techniques and design methodologies for thermal barrier coatings. The emphasis of this review is on the particle technology; the interrelationship between particle preparation, modification and the resulting properties, to assist developments in advanced and novel thermal barrier coatings for engineering applications.

关键词： Thermal barrier coatingAir plasma sprayElectron beam-physical vapor depositionThermally grown oxideYttria-stabilized zirconiaThermal conductivity

CFD-DEM analysis of particle polydispersity on the performance of fluidised bed reactor during silane pyrolysis Author links open overlay panel

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Particuology 2024年第8期91卷 72-87页

作者： Akshayveer vijay M.Shinde MS2Discovery interdisciplinary Research institute Wilfrid Laurier UniversityWaterlooOntarioN2L3C5Canada Department of Chemical Engineering Indian Institute of Technology(BHU)Varanasi221005India

A CFD-DEM model is developed for chemical vapour deposition of silane in a fluidized bed reactor to investigate the effect of polydispersity on local phase dynamics,mass and heat transport,as well as the rate of Si *** gas-phase fines formation and heterogeneous deposition on the seed particle,as well as the scavenging effect for Si particle growth,are *** method is first validated against the experimentally measured Si deposition rate,percentage of fine production and minimum fluidisation ***,the properties,primarily particle intermixing,fluidisation behaviour and bubble dynamics along with the deposition process,are analyzed for several polydisperse beds under various operating *** effect of polydispersity of the bed on a fraction of the bubble size,dense phase expansion and interchange coefficient between various phases is thoroughly investigated to establish a correlation with reactor *** results show that broad-Gaussian particle size distribution(PSD)exhibits excellent improvement in fluidisation behaviour,resulting in a high deposition rate,and minimum formation of Si fines.

关键词： CFD-DEM method Chemical vapour deposition(CVD) Particle size distribution Silicon Gas-solid fluidized bed

Hybrid image Compression-Encryption Scheme Based on Multilayer Stacked Autoencoder and Logistic Map

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

China Communications 2022年第1期19卷 238-252页

作者： Neetu Gupta Ritu vijay Computer Science&Engineering Department Banasthali VidyapithBanasthaliIndia Department of Electronics Engineering Banasthali VidyapithBanasthaliIndia.

Secure transmission of images over a communication channel, with limited data transfer capacity, possesses compression and encryption schemes. A deep learning based hybrid image compression-encryption scheme is proposed by combining stacked auto-encoder with the logistic map. The proposed structure of stacked autoencoder has seven multiple layers, and back propagation algorithm is intended to extend vector portrayal of information into lower vector space. The randomly generated key is used to set initial conditions and control parameters of logistic map. Subsequently, compressed image is encrypted by substituting and scrambling of pixel sequences using key stream sequences generated from logistic *** proposed algorithms are experimentally tested over five standard grayscale images. Compression and encryption efficiency of proposed algorithms are evaluated and analyzed based on peak signal to noise ratio(PSNR), mean square error(MSE), structural similarity index metrics(SSiM) and statistical,differential, entropy analysis respectively. Simulation results show that proposed algorithms provide high quality reconstructed images with excellent levels of security during transmission..

关键词： compression-encryption stacked autoencoder chaotic system back propagation algorithm logistic map

Stability Analysis, Chaos Control of Fractional Order Vallis and El-Nino Systems and Their Synchronization

在线全文

学校读者我要写书评

暂无评论

iEEE/CAA Journal of Automatica Sinica 2017年第1期4卷 114-124页

作者： Subir Das vijay K Yadav Department of Mathematical Sciences Indian Institute of Technology Banaras Hindu University

in this article the authors have studied the stability analysis and chaos control of the fractional order Vallis and El-Nino systems. The chaos control of these systems is studied using nonlinear control method with the help of a new lemma for Caputo derivative and Lyapunov stability *** synchronization between the systems for different fractional order cases and numerical simulation through graphical plots for different particular cases clearly exhibit that the method is easy to implement and reliable for synchronization of fractional order chaotic systems. The comparison of time of synchronization when the systems pair approaches from standard order to fractional order is the key feature of the article.

关键词： El-Nino system fractional derivative nonlinear control method stability analysis synchronization Vallis systems

in-line digital holography for dynamic metrology of MEMS(invited Paper)

在线全文

学校读者我要写书评

暂无评论

Chinese Optics Letters 2009年第12期7卷 1117-1122页

作者： vijay Raj Singh Anand Asundi School of Mechanical and Aerospace Engineering Nanyang Technological University

in-line digital holography helps to relax the spatial resolution requirement on charge-coupled device sensors for digital recording of holograms and to utilize the full sensing area for image reconstruction which provides larger field of view and better imaging resolution. in this letter, a lensless in-line digital holographic microscopy is presented for dynamic metrology of micro-electro-mechanical system devices. The methodologies of interferometry and time-averaged in-line digital holography are presented for dynamic measurements, which are also useful for simultaneous suppression of in-line waves from real image wave. The experimental results are presented for dynamic thermal characterization of microheater and vibration analysis of cantilevers.

关键词： line MEMS

Recent progress in in vivo studies and clinical applications of magnesium based biodegradable implants–A review

在线全文

学校读者我要写书评

暂无评论

Journal of Magnesium and Alloys 2021年第4期9卷 1149-1166页

作者： Prithivirajan Sekar Narendranath S vijay Desai Corrosion Engineering Lab Department of Mechanical EngineeringNational Institute of Technology KarnatakaSurathkalSrinivasanagarMangalore 575025KarnatakaIndia

Biodegradable magnesium has regained great attention due to its ability to temporarily offer mechanical strength and degrade completely once the injured pathological tissue is healed.A few clinical applications of Mg-based implants were reported in the last ***,the knowledge and experience is being gained continuously by studying the host response and degradation behavior of Mg implant in animal models and clinical *** led to the development of commercial products emerging from Europe and Asia very *** potential of Mg implants in repairing fractures at upper and lower limb of large,small animal models and humans is compared and discussed in *** addition the possible future Mg implants that might treat problems concerning to urology and gynecology are reviewed.

关键词： Biodegradable Magnesium Fracture healing Translational medicine Clinical trials

Recent Progress in Deciphering the Biosynthesis of Aspartate-Derived Amino Acids in Plants

在线全文

学校读者我要写书评

暂无评论

Molecular Plant 2010年第1期3卷 54-65页

作者： Georg Jander vijay Joshi Boyce Thompson institute for Plant Research 1 Tower Road Ithaca NY 14850 USA

Plants are either directly or indirectly the source of most of the essential amino acids in animal diets. Four of these essential amino acids--methionine, threonine, isoleucine, and lysine--are all produced from aspartate via a well studied biosynthesis pathway. Given the nutritional interest in essential amino acids, the aspartate-derived amino acid pathway has been the subject of extensive research. Additionally, several pathway enzymes serve as targets for econom- ically important herbicides, and some of the downstream products are biosynthetic precursors for other essential plant metabolites such as ethylene and S-adenosylmethionine. Recent and ongoing research on the aspartate-derived family of amino acids has identified new enzyme activities, regulatory mechanisms, and in vivo metabolic functions. Together, these discoveries will open up new possibilities for plant metabolic engineering.

关键词： Metabolic regulation primary metabolism Arabidopsis.