检索结果-南通市图书馆

Single-step nano-engineering of multiple micro-rough metals via anodization

在线全文

学校读者我要写书评

暂无评论

Nano Research 2023年第1期16卷 1320-1329页

作者： Divya Chopra Tianqi Guo sašo Ivanovski Karan Gulati The University of Queensland School of DentistryHerston QLD 4006Australia

Anodization is a cost-effective technique to nano-engineer various metals,however,optimizations have been mostly restricted to Al and Ti,and for easy to manage polished and flat substrates,limiting industrial ***,we aim at standardizing and simplifying anodization of ten metals,attempting to make metal nano-engineering more *** a world-first attempt,we synthesize a standard electrolyte to fabricate controlled nanostructures on various metals,taking a close look at the influence of the substrate topography,electrolyte composition,and electrolyte aging(repeated use of same electrolyte)towards designing a standard nano-engineering *** of curved substrates(metal wires)with micro-roughness allows for ease of industrial translation across various *** study is a step closer to standardizing anodization and fabrication of controlled nanotopography on various metallic surfaces,while maintaining scalability and ease of use.

关键词： electrochemical anodization nanopores nanotubes metal metal oxide nanostructures

Rapid detection of total phenolics,antioxidant activity and ascorbic acid of dried apples by chemometric algorithms

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Food Bioscience 2022年第3期47卷 662-669页

作者： NecatiÇetin Cevdet sağlam Erciyes University Faculty of AgricultureDepartment of Biosystems EngineeringKayseriTurkey

Multivariate approaches like machine learning are commonly used in estimation of biochemical traits from spectral and color characteristics of foodstuffs and agricultural *** present study,windfall apples of Golden Delicious,Oregon Spur and Granny Smith cultivars were dried in open-sun,controlled greenhouse,microwave oven(200W),hybrid system(100W+60℃),convective dryer(70℃)and freeze-dryer(−55℃).Spectral,chromatic and biochemical characteristics of dried apples were determined and assessed through machine learning *** phenolic matter,DPPH(2,2-Diphenyl-1-picrylhydrazyl),FRAP(Ferric Reducing Antioxidant Power)and ascorbic acid content were estimated with the use of five different machine learning algorithms(artificial neural networks,k-nearest neighbor,random forest,gaussian processes and support vector regression).The most successful results were achieved in estimation of total phenolic content(R≥0.85).Additionally,Multilayer Perceptron,Support Vector Regression and Gaussian Processes were identified as the best machine learning algorithms in estimation of biochemical compositions of dried apples.

关键词： Apple Drying Biochemical composition VIS/NIR spectra Machine learning

Neurologic complications after liver transplantation

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 Hepatology 2013年第8期5卷 409-416页

作者： saa A Zivkovi Neurology Service - MSL Department of Veterans Affairs Medical Center Department of Neurology University of Pittsburgh School of Medicine

Neurologic complications are relatively common after solid organ transplantation and affect 15%-30%of liver transplant *** is often related to immunosuppressant neurotoxicity and opportunistic *** common complications include seizures and encephalopathy,and occurrence of central pontine myelinolysis is relatively specific for liver transplant *** allograft function may precipitate hepatic encephalopathy and neurotoxicity of calcineurin inhibitors typically manifests with tremor,headaches and *** of neurotoxic immunosuppressants or conversion to an alternative medication usually result in clinical *** preventive and diagnostic protocols have helped to reduce the prevalence of opportunistic central nervous system(CNS)infections,but viral and fungal CNS infections still affect 1%of liver transplant recipients,and the morbidity and mortality in the affected patients remain fairly *** illness myopathy may also affect up to 7%of liver transplant *** insufficiency is also associated with various neurologic disorders which may improve or resolve after successful liver *** diagnosis and timely intervention are essential to improve outcomes,while advances in clinical management and extended post-transplant survival are increasingly shifting the focus to chronic post-transplant complications which are often encountered in a community hospital and an outpatient setting.

关键词： Liver transplantation Neurologic complications Meningoencephalitis Seizures Stroke Critical illness myopathy

Bayesian Computation for the Parameters of a Zero-Inflated Cosine Geometric Distribution with Application to COVID-19 Pandemic Data

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 Modeling in Engineering & Sciences 2023年第5期135卷 1229-1254页

作者： Sunisa Junnumtuam sa-Aat Niwitpong Suparat Niwitpong Department ofApplied Statistics Faculty of Applied ScienceKing Mongkut’sUniversity of TechnologyNorth BangkokBangkok10800Thailand

A new three-parameter discrete distribution called the zero-inflated cosine geometric(ZICG)distribution is proposed for the first time *** can be used to analyze over-dispersed count data with excess *** basic statistical properties of the new distribution,such as the moment generating function,mean,and variance are ***,confidence intervals are constructed by using the Wald,Bayesian,and highest posterior density(HPD)methods to estimate the true confidence intervals for the parameters of the ZICG *** efficacies were investigated by using both simulation and real-world data comprising the number of daily COVID-19 positive cases at the Olympic Games in Tokyo *** results show that the HPD interval performed better than the other methods in terms of coverage probability and average length in most cases studied.

关键词： Bayesian analysis confidence interval gibbs sampling random-walk metropolis zero-inflated count data

POSITIVE SOLUTIONS FOR SINGULAR BVPs ON THE POSITIVE HALF-LINE ARISING FROM EPIDEMIOLOGY AND COMBUSTION THEORY

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Acta Mathematica Scientia 2012年第2期32卷 672-694页

作者： Smaïl Djebali Ouiza saïfi 闫宝强 Department of Mathematics E.N.S.P.O.Box 9216050 Kouba.AlgiersAlgeria Department of Economics Faculty of Economic and Management SciencesAlgiers UniversityAlgeria Department of Mathematics Shandong Normal University

In this work, we are concerned with the existence and multiplicity of positive solutions for singular boundary value problems on the half-line. Two problems from epi- demiology and combustion theory set on the positive half-line are investigated upper and lower solution techniques combined with fixed point index on cones in priate Banach spaces. The results complement recent ones in the literature. We use appropriate Banach spaces. The results complement recent ones in the literature.

关键词： Fixed points index positive solution singular problem cone lower andupper solution half-line

An Abstract Reachability Approach by Combining HOL Induction and Multiway Decision Graphs

在线全文

学校读者我要写书评

暂无评论

Journal of Computer Science & Technology 2009年第1期24卷 76-95页

作者： sa'ed Abed Otmane Ait Mohamed Ghiath Al-sammane ECE Department Concordia UniversityMontrealCanada

In this paper, we provide a necessary infrastructure to define an abstract state exploration in the HOL theorem prover. Our infrastructure is based on a deep embedding of the Multiway Decision Graphs （MDGs） theory in HOL. MDGs generalize Reduced Ordered Binary Decision Diagrams （ROBDDs） to represent and manipulate a subset of first-order logic formulae. The MDGs embedding is based on the logical formulation of an MDG as Directed Formulae （DF）. Then, the MDGs operations are defined and the correctness proof of each operation is provided. The MDG teachability algorithm is then defined as a conversion that uses our MDG theory within HOL. Finally, a set of experimentations over benchmark circuits has been conducted to ensure the applicability and to measure the performance of our approach.

关键词： HOL theorem prover multiway decision graphs correctness reachability analysis

REVISITING THE SIMILAR PROCESS TO ENGINEER THE CONTEMPORARY SYSTEMS

在线全文

学校读者我要写书评

暂无评论

Journal of Systems Science and Systems Engineering 2010年第3期19卷 321-350页

作者： Ana Luísa RAMOS José Vasconcelos FERREIRA Jaume BARCELó GOVCOPP-Department of Economics Management and Industrial EngineeringUniversity of Aveiro Department of Statistics and Operations Research Technical University of Catalonia

This paper addresses the present-day context of Systems Engineering, revisiting and setting up an updated framework for the SIMILAR process in order to use it to engineer the contemporary systems. The contemporary world is crowded of large interdisciplinary complex systems made of other systems, personnel, hardware, software, information, processes, and facilities. An integrated holistic approach is crucial to develop these systems and take proper account of their multifaceted nature and numerous interrelationships. As the system＇s complexity and extent grow, the number of parties involved （stakeholders and shareholders） usually also raises, bringing to the interaction a considerable amount of points of view, skills, responsibilities, and interests. The Systems Engineering approach aims to tackle the complex and interdisciplinary whole of those socio-technical systems, providing the means to enable their successful realization. Its exploitation in our modern world is assuming an increasing relevance noticeable by emergent standards, academic papers, international conferences, and post-graduate programmes in the field. This work aims to provide ＂the picture＂ of modern Systems Engineering, and to update the context of the SIMILAR process model in order to use this renewed framework to engineer the challenging contemporary systems. The emerging trends in the field are also pointed-out with particular reference to the Model-Based Systems Engineering approach.

关键词： SIMILAR process systems engineering standards MBSE

Transverse momentum balance of dijets in Xe+Xe collisions at the LHC

在线全文

学校读者我要写书评

暂无评论

Nuclear Science and Techniques 2024年第7期35卷 137-146页

作者： Yao Li Shu-Wan Shen sa Wang Ben-Wei Zhang Key Laboratory of Quark&Lepton Physics(MOE)and Institute of Particle Physics Central China Normal UniversityWuhan430079China College of Science China Three Gorges UniversityYichang443002China Center for Astronomy and Space Sciences and Institute of Modern Physics China Three Gorges UniversityYichang443002China Guangdong-Hong Kong Joint Laboratory of Quantum Matter Guangdong Provincial Key Laboratory of Nuclear ScienceSouthern Nuclear Science Computing CenterSouth China Normal UniversityGuangzhou510006China

We present a theoretical study of the medium modifications of the p_(T)balance (x_(J)) of dijets in Xe+Xe collisions at■.The initial production of dijets was carried out using the POWHEG+PYTHIA8 prescription,which matches the next-toleading-order (NLO) QCD matrix elements with the parton shower (PS) *** SHELL model described the in-medium evolution of nucleus–nucleus collisions using a transport *** theoretical results of the dijet xJin the Xe+Xe collisions exhibit more imbalanced distributions than those in the p+p collisions,consistent with recently reported ATLAS *** utilizing the Interleaved Flavor Neutralisation,an infrared-and-collinear-safe jet flavor algorithm,to identify the flavor of the reconstructed jets,we classify dijets processes into three categories:gluon–gluon (gg),quark–gluon (qg),and quark–quark (qq),and investigated the respective medium modification patterns and fraction changes of the gg,qg,and qq components of the dijet sample in Xe+Xe *** is shown that the increased fraction of qg component at a small x_(J)contributes to the imbalance of the dijet;in particular,the q_(1)g_(2)(quark-jet-leading) dijets experience more significant asymmetric energy loss than the g_(1)q_(2)(gluon-jet-leading) dijets traversing the *** comparing the■of inclusive,■ dijets in Xe+Xe collisions,we observe■.Moreover,ρ_(Xe),P_(b),the ratios of the nuclear modification factors of dijets in Xe+Xe to those in Pb+Pb,were calculated,which indicates that the yield suppression of dijets in Pb+Pb is more pronounced than that in Xe+Xe owing to the larger radius of the lead nucleus.

关键词： Heavy-ion collisions Quark-gluon plasma Jet quenching Transverse momentum balance

From Self-assembled Monolayers to Chemically Patterned Brushes:Controlling the Orientation of Block Copolymer Domains in Films by Substrate Modification

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Polymer Science 2016年第6期34卷 659-659,660-678页

作者： Xiao-sa Jin Yuan-yuan Pang 季生象 Key Laboratory of Polymer Ecomaterials Changchun Institute of Applied Chemistry Chinese Academy of Sciences University of Chinese Academy of Sciences

Block copolymer lithography is emerging as one of the leading technologies for patteming nanoscale dense features. In almost all potential applications of this technology, control over the orientation of cylindrical and lamellar domains is required for pattern transfer from the block copolymer film. This review highlights the state-of-art development of brushes to modify the substrates to control the assembly behaviors of block copolymers in films. Selected important contributions to the development of self-assembled monolayers, polymer brushes and mats, and chemically patterned brushes are discussed.

关键词： Self-assembly Block copolymer Neutral brush Chemical pattern Wetting behavior.