检索结果-南通市图书馆

Computers, Materials & Continua 2021年第1期66卷 17-33页

作者： Chung le van Vikram Puri Nguyen Thanh Thao Dac-Nhuong le Duy Tan University Da Nang550000Vietnam Department of Radiology Hue University of Medicine and PharmacyHue UniversityHue530000Vietnam Institute of Research and Development Duy Tan UniversityDanang550000Vietnam Faculty of Information Technology Duy Tan UniversityDanang550000Vietnam

With the rapid growth of the autonomous system,deep learning has become integral parts to enumerate applications especially in the case of healthcare *** body vertebrae are the longest and complex parts of the human *** are numerous kinds of conditions such as scoliosis,vertebra degeneration,and vertebrate disc spacing that are related to the human body vertebrae or spine or *** detection of these problems is very important otherwise patients will suffer from a disease for a *** this proposed system,we developed an autonomous system that detects lumbar implants and diagnoses scoliosis from the modified Vietnamese x-ray *** applied two different approaches including pre-trained APIs and transfer learning with their pre-trained models due to the unavailability of sufficient x-ray medical *** results show that transfer learning is suitable for the modified Vietnamese x-ray imaging data as compared to the pre-trained API ***,we also explored and analyzed four transfer learning models and two pre-trained API models with our datasets in terms of accuracy,sensitivity,and specificity.

关键词： Lumbar implant diagnosing scoliosis X-Ray imaging transfer

On the Laws of Large Numbers for Double Arrays of Independent Random Elements in Banach Spaces

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 Sinica,English Series 2014年第8期30卷 1353-1364页

作者： Andrew ROSALSKY le van THANH Nguyen Thi THUY Department of Statistics University of FloridaGainesville Department of Mathematics Vinh University

For a double array of independent random elements {Vmn,m ≥ 1,n ≥ 1} in a real separable Banach space,conditions are provided under which the weak and strong laws of large numbers for the double sums mi=1 nj=1Vij,m ≥ 1,n ≥ 1 are *** the identically distributed and the nonidentically distributed cases are *** the main theorems,no assumptions are made concerning the geometry of the underlying Banach *** theorems are applied to obtain Kolmogorov,Brunk–Chung,and Marcinkiewicz–Zygmund type strong laws of large numbers for double sums in Rademacher type p（1 ≤ p ≤ 2） Banach spaces.

关键词： Real separable Banach space double array of independent random elements strong and weak laws of large numbers almost sure convergence convergence in probability Rademacher type p Banach space

Comparative Study of Light Manipulation in Three-level Systems Via Spontaneously Generated Coherence and Relative Phase of Laser Fields

在线全文

学校读者我要写书评

暂无评论

Communications in Theoretical Physics 2019年第8期71卷 947-954页

作者： Nguyen Huy Bang le Nguyen Mai Anh Nguyen Tien Dung le van Doai Vinh University 182 Le Duan Street Vinh City Vietnam Nong Lam University Ho Chi Minh City Vietnam (Received March 21 2019revised manuscript

We present a comparative study of the control of group velocity in three-level atomic systems including Λ-, Ladder-, and V-types via spontaneously generated coherence(SGC) and relative phase of laser *** the steady regime, expressions of group index are derived as an analytical function of controllable parameters related to SGC and relative *** is shown that the group velocity can be further slowed down or speeded up under SGC in which modifications of group velocity due to the SGC in Λ-and V-systems are stronger than that in *** particular, when interference strength of SGC p increases from 0.7 to 1.0, the light propagation is switched from superluminal to subluminal modes(for Λ-and Ladder-systems) or from subluminal to superluminal modes(for Vsystem).In the presence of relative phase, the group velocity changes between subluminal and superluminal modes with a period of 2π.In resonant region, the largest positive value of group index reaches at the relative phase φ=π while the largest negative value of group index reaches at φ= 0 and 2π for the Λ-and Ladder-systems, otherwise, for the V-system the largest positive group index occurs at φ= 0 and 2π, and the largest negative group index occurs at φ=π.

关键词： electromagnetically induced transparency spontaneously generated coherence group velocity

An isogeometric analysis approach for dynamic response of doubly-curved magneto electro elastic composite shallow shell subjected to blast loading

在线全文

学校读者我要写书评

暂无评论

Defence Technology（防务技术） 2024年第11期41卷 159-180页

作者： Pham Hoang Tu Tran van Ke Vu Khac Trai le Hoai Faculty of Automotive Engineering School of TechnologyVan Lang UniversityHo Chi Minh City 700000Viet Nam Faculty of Mechanical Engineering Le Quy Don Technical UniversityHanoi 100000Viet Nam Faculty of Engineering and Technology Nguyen Tat Thanh UniversityHo Chi Minh City 700000Viet Nam HUTECH Institute of Engineering HUTECH UniversityHo Chi Minh City 700000Viet Nam

For the first time, the isogeometric analysis(IGA) approach is used to model and analyze free and forced vibrations of doubly-curved magneto-electro-elastic(MEE) composite shallow shell resting on the visco-Pasternak foundation in a hygro-temperature environment. The doubly-curved MEE shallow shell types include spherical shallow shell, cylindrical shallow shell, saddle shallow shell, and elliptical shallow shell subjected to blast load are investigated. The Maxwell equation and electromagnetic boundary conditions are used to determine the vary of the electric and magnetic potentials. The MEE shallow shell's equations of motion are derived from Hamilton's principle and refined higher-order shear theory. Then, the IGA method is used to derive the laws of natural frequencies and dynamic responses of the shell under various boundary conditions. The accuracy of the model and method is verified through reliable numerical comparisons. Aside from this, the impact of the input parameters on the free and forced vibration of the doubly-curved MEE shallow shell is examined in detail. These results may be useful in the design and manufacture of military structures such as warships, fighter aircraft, drones and missiles.

关键词： IGA approach Free and forced vibration Doubly-curved MEE shallow shell Blast load

Activated carbon derived from rice husk by NaOH activation and its application in supercapacitor

在线全文

学校读者我要写书评

暂无评论

Progress in Natural Science:Materials International 2014年第3期24卷 191-198页

作者： Khu le van Thu Thuy Luong Thi Physical Chemistry Department Hanoi University of Education

Four activated carbon(AC) samples prepared from rice husk under different activation temperatures have been characterized by N2adsorption–desorption isotherms, thermogravimetric analysis(TGA–DTA), Fourier transform infrared spectroscopy(FTIR) and scanning electron microscopy(SEM). The specific surface area of AC sample reached 2681 m2 g 1under activation temperature of 800 1C. The AC samples were then tested as electrode material; the specific capacitance of the as-prepared activated carbon electrode was found to be 172.3 F g 1using cyclic voltammetry at a scan rate of 5 mV s 1and 198.4 F g 1at current density 1000 mA g 1in the charge/discharge mode.& 2014 Chinese Materials Research Society. Production and hosting by Elsevier B.V. All rights reserved.

关键词： Rice husk Activated carbon Supercapacitor Surface area Micropore

GLOBALLY ATTRACTING SOLUTIONS TO IMPULSIVE FRACTIONAL DIFFERENTIAL INCLUSIONS OF SOBOleV TYPE

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Acta Mathematica Scientia 2017年第5期37卷 1295-1318页

作者： van Hien le Dinh Ke TRAN Trong Kinh CHU Department of Mathematics Hanoi National University of Education 136 Xuan ThuyCau GiayHanoiVietnam Department of Mathematics Hanoi Pedagogical University No.2VinhphucVietnam

We study a generalized Cauchy problem associated with a class of impulsive fractional differential inclusions of Sobolev type in Banach spaces. Our aim is to prove the existence of a compact set of globally attracting solutions to the problem in question. An application to fractional partial differential equations subject to impulsive effects is given to illustrate our results.

关键词： globally attracting solution impulsive condition nonlocal condition condensing map measure of non-compactness MNC-estimate

Energy Measurement of Bubble Bursting Based on Vibration Signals

在线全文

学校读者我要写书评

暂无评论

Chinese Physics letters 2012年第6期29卷 185-188页

作者： LIU Xiao-Bo ZHANG Jian-Run LI Pu le van-Quynh School of Mechanical Engineering Southeast UniversityNanjing 211189

An experimental study of the energy of bubble bursting at the surface of a high-viscosity liquid on a cantilever beam is *** sudden bursting event of a bubble at the liquid surface can cause a vibration of the cantilever beam besides the acoustic wave and jet *** peaks of the vibration signal from the beam slightly lag the peaks of the acoustic signal,and the energy transferred to the vibration is larger than that transferred to the acoustic *** amplitude of the jet wave depends on the thickness of thc liquid hlm and the size of the *** results of the investigation can be used to understand the dynamic characteristics of bubble bursting.

关键词： wave bubble beam

Fuzzy MCDM for Improving the Performance of Agricultural Supply Chain

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Computers, Materials & Continua 2022年第11期73卷 4003-4015页

作者： le Thi Diem My Chia-Nan Wang Nguyen van Thanh Department of Industrial Engineering and Management National Kaohsiung University of Science and TechnologyKaohsiung CityTaiwan Faculty of Commerce Van Lang UniversityHo Chi Minh CityVietnam

Fertilizer industry in Vietnam and globally have entered the saturation *** the growth rate slowing down,this poses challenges for the development impetus of the fertilizer industry in the next *** fact,over the past few decades,Vietnam’s crop industry has abused excessive investment in chemical fertilizers,with organic fertilizers are rarely used or not at all,limiting crop productivity,increasing pests and *** develop sustainable agriculture,Vietnam’s crop industry must limit the use of chemical fertilizers,increase the use of environmentally friendly organic and natural mineral fertilizers to produce clean agricultural products which is ***,it is necessary to consider and choose the right supplier to ensure the goal of sustainable *** Fuzzy Analytic Hierarchy Process(SF-AHP),and the combinative distance-based assessment(CODAS)are new Multicriteria Decision Making(MCDM)method which can be used to solve supplier selection *** paper uses an effective solution based on a combined the concept of triple bottom line(TBL),SF-AHP and CODAS approach to help agriculture companies that need to select the best fertilizer *** research can support supply chain managers to achieve supply chain systems that reduce not only sourcing costs,but also develop sustainable agriculture.

关键词： Fuzzy theory MCDM model fertilizer agricultural supply chain optimization

Novel Z-Scheme ZnIn_(2)S_(4)-based photocatalysts for solar-driven environmental and energy applications: Progress and perspectives

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Materials Science & Technology 2021年第28期87卷 234-257页

作者： Yogesh Kumar Rohit Kumar Pankaj Raizada Aftab Aslam Parwaz Khan Quyet van le Pardeep Singh van-Huy Nguyen School of Advanced Chemical Sciences Shoolini UniversitySolanHP173229India Department of Chemistry Government Degree CollegeSolanHP173212India Chemistry Department Faculty of ScienceKing Abdulaziz UniversityP.O.Box 80203Jeddah21589Saudi Arabia Institute of Research and Development Duy Tan UniversityDa Nang550000Vietnam Department for Management of Science and Technology Development Ton Duc Thang UniversityHo Chi Minh CityVietnam Faculty of Applied Sciences Ton Duc Thang UniversityHo Chi Minh CityVietnam

Benefiting from strong redox ability,improved charge transport,and enhanced charge separation,Zscheme heterostructures of ZnIn_(2)S_(4) based photocatalysts have received considerable interest to tackle energy needs and environmental *** present review highlights the properties of ZnIn_(2)S_(4),which make it a promising photocatalyst,and a suitable combination with oxidation photocatalyst to form Zscheme,leading to improve their photocatalytic properties *** the central part of this review,various types of Z-scheme heterojunction developed recently based on ZnIn_(2)S_(4) and their application in pollutant degradation,water splitting,CO_(2) reduction,and toxic metals *** analytical techniques to detect or trap the active radical and study the charge separation and lifetime of charge carriers in these Z-schemes are *** review offers its readers a broad optical window for the structural architecture of ZnIn_(2)S_(4)-based Z-schemes,photocatalytic activity,stability,and their technological ***,we discuss the challenges and opportunities for further development on Z-Scheme ZnIn_(2)S_(4)-based photocatalysts toward energy and environmental applications based on the recent progress.

关键词： ZnIn_(2)S_(4) Z-scheme photocatalyst Charge transfer mechanism Pollutant degradation Environmental remediation

Applying Wide & Deep learning Model for Android Malware Classification

在线全文

学校读者我要写书评

暂无评论

Computer Systems Science & Engineering 2023年第6期45卷 2741-2759页

作者： le Duc Thuan Pham van Huong Hoang van Hiep Nguyen Kim Khanh Ha Noi University of Science and Technology Ha Noi100000Viet Nam Academy of Cryptography Techniques Ha Noi100000Viet Nam

Android malware has exploded in popularity in recent years,due to the platform’s dominance of the mobile *** the advancement of deep learning technology,numerous deep learning-based works have been proposed for the classification of Android *** learning technology is designed to handle a large amount of raw and continuous data,such as image content ***,it is incompatible with discrete features,i.e.,features gathered from multiple ***,if the feature set is already well-extracted and sparsely distributed,this technology is less effective than traditional machine *** the other hand,a wide learning model can expand the feature set to enhance the classification *** maximize the benefits of both methods,this study proposes combining the components of deep learning based on multi-branch CNNs(Convolutional Network Neural)with wide learning *** feature set is evaluated and dynamically partitioned according to its meaning and generalizability to subsets when used as input to the model’s wide or deep *** proposed model,partition,and feature set quality are all evaluated using the K-fold cross validation method on a composite dataset with three types of features:API,permission,and raw *** accuracy with Wide and Deep CNN(WDCNN)model is 98.64%,improved by 1.38%compared to RNN(Recurrent Neural Network)model.

关键词： Wide and deep(W&D)learning convolutional neural network image feature raw features generalized features