Resource Type

Journal Article 48

Year

2024 1

2023 4

2022 5

2021 6

2020 4

2019 3

2018 3

2017 4

2016 2

2015 4

2014 1

2012 3

2011 1

2010 1

2009 2

2008 1

2007 1

2005 1

2000 1

open ︾

Keywords

extended finite element method 2

induction motor 2

in-situ hydrothermal deoxygenation 1

ABAQUS 1

AGM 1

Active noise control (ANC) 1

Adaptation pattern 1

Architectural pattern 1

Architectural tactic 1

Beamformer 1

Betz limit 1

COVID-19 1

Clinical diagnostic criteria 1

Diphenylarsinic acid (DPAA) 1

Disturbance observer 1

EXAFS 1

Ecology in image processing 1

Electro-hydraulic actuator 1

End-of-life battery 1

open ︾

Search scope:

排序： Display mode:

Extended Hemispherical Lens and Its Applications in Millimeter Wave Focal Imaging Systems

Sun Zhongliang,Dou Wenbin

Strategic Study of CAE 2000, Volume 2, Issue 3,   Pages 42-47

Abstract: This paper analyzes extended hemispherical lens, which can be used in focal imaging.lens.of the lens is analyzed by using Stratton-Chu formula and ray tracing method.It will provide much information about the imaging performance of the lens.Furthermore, the lens can be used to couple with a quasi-optical system.

Keywords： millimeter waves     antennas     imaging     extended hemispherical lens    

HTML PDF Collect

Segmentation and focus-point location based on boundary analysis in forest canopy hemispherical photography Article

Jia-yin SONG,Wen-long SONG,Jian-ping HUANG,Liang-kuan ZHU

Frontiers of Information Technology & Electronic Engineering 2016, Volume 17, Issue 8,   Pages 741-749 doi: 10.1631/FITEE.1601169

Abstract: our main focus was on using circular image region segmentation, which is the basis of forest canopy hemisphericalautomatically adjusting the parameters of high-performance image acquisition devices used in forest canopy hemispherical

Keywords： Fisheye lens     Least squares method     Image segmentation     Ecology in image processing     Hemispherical photography    

HTML PDF Collect

Review of small aspheric glass lens molding technologies

Shaohui YIN,Hongpeng JIA,Guanhua ZHANG,Fengjun CHEN,Kejun ZHU

Frontiers of Mechanical Engineering 2017, Volume 12, Issue 1,   Pages 66-76 doi: 10.1007/s11465-017-0417-2

Abstract:

Aspheric lens can eliminate spherical aberrations, coma, astigmatism, field distortions, and otherThis type of lens can also reduce the loss of light energy and obtain high-quality images and opticaland high-efficiency manufacturing technology for machining small-diameter aspheric lens for industrialHowever, the residual stress and profile deviation of the glass lens are greatly affected by various, and lens molding.

Keywords： aspheric glass lens     mold-die manufacturing     lens molding     molding process simulation    

HTML PDF Collect

Thermo-elastic extended meshfree method for fracture without crack tip enrichment

A. ASADPOUR

Frontiers of Structural and Civil Engineering 2015, Volume 9, Issue 4,   Pages 441-447 doi: 10.1007/s11709-015-0319-5

Abstract: This is the first manuscript presenting an extended meshfree method for thermo- elastic fracture which

Keywords： meshfree method     thermo-elasticity    

HTML PDF Collect

Concurrent fatigue crack growth simulation using extended finite element method

Zizi LU, Yongming LIU,

Frontiers of Structural and Civil Engineering 2010, Volume 4, Issue 3,   Pages 339-347 doi: 10.1007/s11709-010-0078-2

Abstract: growth analysis is proposed using a novel small time scale model for fatigue mechanism analysis and the extended

Keywords： small time scale model     extended finite element method (X-FEM)     crack growth     multiaxial    

HTML PDF Collect

Significant progress in solution of nonlinear equations at displacement of structure and heat transfer extended

M. R. AKBARI,D. D. GANJI,M. NIMAFAR,A. R. AHMADI

Frontiers of Mechanical Engineering 2014, Volume 9, Issue 4,   Pages 390-401 doi: 10.1007/s11465-014-0313-y

Abstract:

In this paper, we aim to promote the capability of solving two complicated nonlinear differential equations: 1) Static analysis of the structure with variable cross section areas and materials with slope-deflection method; 2) the problem of one dimensional heat transfer with a logarithmic various surface A(x) and a logarithmic various heat generation G(x) with a simple and innovative approach entitled “Akbari-Ganji’s method” (AGM). Comparisons are made between AGM and numerical method, the results of which reveal that this method is very effective and simple and can be applied for other nonlinear problems. It is significant that there are some valuable advantages in this method and also most of the differential equations sets can be answered in this manner while in other methods there is no guarantee to obtain the good results up to now. Brief excellences of this method compared to other approaches are as follows: 1) Differential equations can be solved directly by this method; 2) without any dimensionless procedure, equation(s) can be solved; 3) it is not necessary to convert variables into new ones. According to the aforementioned assertions which are proved in this case study, the process of solving nonlinear equation(s) is very easy and convenient in comparison to other methods.

Keywords： AGM     extended surface     heat transfer     slope-deflection method    

HTML PDF Collect

Characterization of aerodynamic performance of wind-lens turbine using high-fidelity CFD simulations

Islam HASHEM, Aida A. HAFIZ, Mohamed H. MOHAMED

Frontiers in Energy 2022, Volume 16, Issue 4,   Pages 661-682 doi: 10.1007/s11708-020-0713-0

Abstract: Wind-lens turbines (WLTs) exhibit the prospect of a higher output power and more suitability for urbanThe wind-lens typically comprises a diffuser shroud coupled with a flange appended to the exit peripheryIn this paper, the aerodynamic performance of the wind-lens is computationally assessed using high-fidelitythat the proposed methodology could be able to precisely predict the aerodynamic behavior of the wind-lensThe results affirm that wind-lens with cycloidal profile yield an augmentation of about 58% increase

Keywords： shroud     diffuser-augmented wind turbine (DAWT)     Betz limit     aerodynamics     computational fluid dynamics (CFD)    

HTML PDF Collect

Sensorless direct torque control for salient-pole PMSM based on extended Kalman filter fed by AC/DC/AC

F. BENCHABANE, A. TITAOUINE, O. BENNIS, K. YAHIA, D. TAIBI, A. GUETTAF

Frontiers in Energy 2012, Volume 6, Issue 3,   Pages 247-254 doi: 10.1007/s11708-012-0190-1

Abstract: this paper, a new sensorless interior permanent magnet synchronous motor (IPMSM) drives method with extended

Keywords： direct torque control (DTC)     sensorless control     extended Kalman filter (EKF)     permanent magnet synchronous    

HTML PDF Collect

Uncertainty propagation analysis by an extended sparse grid technique

X. Y. JIA, C. JIANG, C. M. FU, B. Y. NI, C. S. WANG, M. H. PING

Frontiers of Mechanical Engineering 2019, Volume 14, Issue 1,   Pages 33-46 doi: 10.1007/s11465-018-0514-x

Abstract: In this paper, an uncertainty propagation analysis method is developed based on an extended sparse gridThe proposed method incorporates the extended Gauss integration into the uncertainty propagation analysisMoreover, assisted by the Rosenblatt transformation, the various types of extended integration pointsare transformed into the extended Gauss-Hermite integration points, which makes the method suitable

Keywords： uncertainty propagation analysis     extended sparse grid     maximum entropy principle     extended Gauss integration    

HTML PDF Collect

An extended thermo-mechanically coupled algorithm for simulation of superelasticity and shape memory

S. HASHEMI,H. AHMADIAN,S. MOHAMMADI

Frontiers of Structural and Civil Engineering 2015, Volume 9, Issue 4,   Pages 466-477 doi: 10.1007/s11709-015-0300-3

Abstract: Thermo-mechanical coupling in shape memory alloys is a very complicated phenomenon. The heat generation/absorption during forward/reverse transformation can lead to temperature-dependent variation of its mechanical behavior in the forms of superelasticity and shape memory effect. However, unlike the usual assumption, slow loading rate cannot guarantee an isothermal process. A two-dimensional thermo-mechanically coupled algorithm is proposed based on the original model of Lagoudas to efficiently model both superelasticity and shape memory effects and the influence of various strain rates, aspect ratios and boundary conditions. To implement the coupled model into a finite element code, a numerical staggered algorithm is employed. A number of simulations are performed to verify the proposed approach with available experimental and numerical data and to assess its efficiency in solving complex SMA problems.

Keywords： shape memory alloy     thermo-mechanical coupling     superplasticity     shape memory effect    

HTML PDF Collect

acid on natural magnetite and siderite: Evidence from sorption kinetics, sequential extraction and extended

Frontiers of Environmental Science & Engineering 2022, Volume 16, Issue 9, doi: 10.1007/s11783-022-1547-2

Abstract:

• DPAA sorption followed pseudo-secondary and intra-particle diffusion models.

Keywords： Diphenylarsinic acid (DPAA)     Sorption     Magnetite     Siderite     Sequential extraction     EXAFS    

HTML PDF Collect

High-Speed Parallel Plasmonic Direct-Writing Nanolithography Using Metasurface-Based Plasmonic Lens Article

Yueqiang Hu, Ling Li, Rong Wang, Jian Song, Hongdong Wang, Huigao Duan, Jiaxin Ji, Yonggang Meng

Engineering 2021, Volume 7, Issue 11,   Pages 1623-1630 doi: 10.1016/j.eng.2020.08.019

Abstract: However, a smaller and steadier plasmonic nanogap, new scheme of plasmonic lens, and parallel processingA multi-stage metasurface-based polarization insensitive plasmonic lens is proposed to couple more power

Keywords： Nanofabrication     Surface plasmon polariton     Lithography     Plasmonic flying head     Plasmonic lens    

HTML PDF Collect

Miniaturized Rotman lens with applications to wireless communication Research Articles

Bao-hua SUN, Qiu-yan LIANG, Gao-nan ZHOU

Frontiers of Information Technology & Electronic Engineering 2020, Volume 21, Issue 1,   Pages 144-158 doi: 10.1631/FITEE.1900501

Abstract: Rotman lens is a type of beamforming network with many advantages, such as true-time delay characteristicRotman lens has been used in a wide range of applications in today’s wireless communication systems.However, the size of a conventional Rotman lens is considerably large.to reduce the size of the ports and hence the total area occupied by the Rotman lens.Using the proposed truncated ports with energy distribution slots, the size of the Rotman lens can be

Keywords： Rotman lens     Miniaturization     Multibeam     Beamformer     Wireless communication    

HTML PDF Collect

Optimal design analysis of a tubular heat exchanger network with extended surfaces using multi-objective

Hassan HAJABDOLLAHI, Mohammad SHAFIEY DEHAJ, Babak MASOUMPOUR, Mohammad ATAEIZADEH

Frontiers in Energy 2022, Volume 16, Issue 5,   Pages 862-875 doi: 10.1007/s11708-022-0839-3

Abstract: The present work aims to investigate the influence of extended surfaces (fins) on the multi-objectiveAn increase in the heat transfer area using various extended surfaces (fins) to enhance the performance

Keywords： constructal theory     extended surface     effectiveness     total heat transfer area     multi-objective optimization    

HTML PDF Collect

A Numerical Convex Lens for the State-Discretized Modeling and Simulation of Megawatt Power Electronics Article

Bochen Shi, Zhengming Zhao, Yicheng Zhu, Zhujun Yu, Jiahe Ju

Engineering 2021, Volume 7, Issue 12,   Pages 1766-1777 doi: 10.1016/j.eng.2021.07.011

Abstract: To address this challenge, this paper proposes the numerical convex lens approach to achieve state-discretizedThe numerical convex lens approach leads to the highly efficient simulation of intricate GHSs across

Keywords： Generalized hybrid systems     Megawatt power electronics     Modeling and simulation     Numerical convex lens    

HTML PDF Collect

Title Author Date Type Operation

Extended Hemispherical Lens and Its Applications in Millimeter Wave Focal Imaging Systems

Sun Zhongliang,Dou Wenbin

Journal Article

Segmentation and focus-point location based on boundary analysis in forest canopy hemispherical photography

Jia-yin SONG,Wen-long SONG,Jian-ping HUANG,Liang-kuan ZHU

Journal Article

Review of small aspheric glass lens molding technologies

Shaohui YIN,Hongpeng JIA,Guanhua ZHANG,Fengjun CHEN,Kejun ZHU

Journal Article

Thermo-elastic extended meshfree method for fracture without crack tip enrichment

A. ASADPOUR

Journal Article

Concurrent fatigue crack growth simulation using extended finite element method

Zizi LU, Yongming LIU,

Journal Article

Significant progress in solution of nonlinear equations at displacement of structure and heat transfer extended

M. R. AKBARI,D. D. GANJI,M. NIMAFAR,A. R. AHMADI

Journal Article

Characterization of aerodynamic performance of wind-lens turbine using high-fidelity CFD simulations

Islam HASHEM, Aida A. HAFIZ, Mohamed H. MOHAMED

Journal Article

Sensorless direct torque control for salient-pole PMSM based on extended Kalman filter fed by AC/DC/AC

F. BENCHABANE, A. TITAOUINE, O. BENNIS, K. YAHIA, D. TAIBI, A. GUETTAF

Journal Article

Uncertainty propagation analysis by an extended sparse grid technique

X. Y. JIA, C. JIANG, C. M. FU, B. Y. NI, C. S. WANG, M. H. PING

Journal Article

An extended thermo-mechanically coupled algorithm for simulation of superelasticity and shape memory

S. HASHEMI,H. AHMADIAN,S. MOHAMMADI

Journal Article

acid on natural magnetite and siderite: Evidence from sorption kinetics, sequential extraction and extended

Journal Article

High-Speed Parallel Plasmonic Direct-Writing Nanolithography Using Metasurface-Based Plasmonic Lens

Yueqiang Hu, Ling Li, Rong Wang, Jian Song, Hongdong Wang, Huigao Duan, Jiaxin Ji, Yonggang Meng

Journal Article

Miniaturized Rotman lens with applications to wireless communication

Bao-hua SUN, Qiu-yan LIANG, Gao-nan ZHOU

Journal Article

Optimal design analysis of a tubular heat exchanger network with extended surfaces using multi-objective

Hassan HAJABDOLLAHI, Mohammad SHAFIEY DEHAJ, Babak MASOUMPOUR, Mohammad ATAEIZADEH

Journal Article

A Numerical Convex Lens for the State-Discretized Modeling and Simulation of Megawatt Power Electronics

Bochen Shi, Zhengming Zhao, Yicheng Zhu, Zhujun Yu, Jiahe Ju

Journal Article