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Time reversal method for guided wave inspection in pipes

DENG Fei, WU Bin, HE Cunfu

Frontiers of Mechanical Engineering 2008, Volume 3, Issue 3,   Pages 251-260 doi: 10.1007/s11465-008-0050-1

Abstract: The application of the time reversal method in pipe-like structures based on finite element method (FEMmeasuring 70 mm × 3.5 mm is used to analyze the reflection coefficient of the (0,2) mode with the time reversalIn parallel, a circumferential locating method based on the time reversal method is described.The time reversal process used for guided wave inspection leads to the temporal and spatial focusing.When the time reversal signals are re-emitted, the angular profile obtained at the axial location of

Keywords: reversal process     beneficial     circumferential location     energy     number    

TiO supported IrO for anode reversal tolerance in proton exchange membrane fuel cell

Frontiers in Energy 2022, Volume 16, Issue 5,   Pages 852-861 doi: 10.1007/s11708-021-0811-7

Abstract: supported IrOx is synthesized by utilizing the surfactant-assistant method and serves as reversalBesides, the MEA has a longer reversal time (530 min) than IrOx (75 min), showing anexcellent reversal tolerance./Ti4O7 with a high dispersity has a great potential to the application on the reversal

Keywords: proton exchange membrane fuel cell (PEMFC)     fuel starvation     cell reverse     reversal tolerance anode    

Flow, thermal, and vibration analysis using three dimensional finite element analysis for a flux reversal

B. VIDHYA,K. N. SRINIVAS

Frontiers in Energy 2016, Volume 10, Issue 4,   Pages 424-440 doi: 10.1007/s11708-016-0423-9

Abstract: This paper presents the simulation of major mechanical properties of a flux reversal generator (FRG)

Keywords: flux reversal generator     air velocity     computation fluid dynamics     thermal analysis     vibration analysis     finite    

The effects of festivals and special events on city image design

LIU Yuan, CHEN Chong

Frontiers of Structural and Civil Engineering 2007, Volume 1, Issue 2,   Pages 255-259 doi: 10.1007/s11709-007-0032-0

Abstract: such as the identification of city image, the promotion of the transmission of city image, and the reversal

Keywords: Visual Identity     reversal     transmission     marketing     Behavior Identity    

A logic-based controller for the mitigation of ventilation air methane in a catalytic flow reversal reactor

Zhikai LI, Zhangfeng QIN, Yagang ZHANG, Zhiwei WU, Hui WANG, Shuna LI, Mei DONG, Weibin FAN, Jianguo WANG

Frontiers of Chemical Science and Engineering 2013, Volume 7, Issue 3,   Pages 347-356 doi: 10.1007/s11705-013-1347-0

Abstract: The control system of a catalytic flow reversal reactor (CFRR) for the mitigation of ventilation airLowering the reference temperature for flow reversal can decrease the bed temperature and benefit stable

Keywords: ventilation air methane     reverse flow reactor     lean methane combustion     logic-based controller     mathematical modeling    

Study on Rank Reversals in Liner Allocation Method

Zhang Ling,Zhou Dequn

Strategic Study of CAE 2008, Volume 10, Issue 2,   Pages 50-53

Abstract:

The problem that the liner allocation method can result in rank reversalsorting vectors and their relativity distribute ra tios are proposed to explain the causes of rank reversal

Keywords: decision making     liner allocation method     rank reversal     rank preservation    

Study on Rank Preservation of the MCDM With Normalizing Formula

Zhang Ling,Zhou Dequn,Li Hongwei,Zhu Peifeng

Strategic Study of CAE 2006, Volume 8, Issue 12,   Pages 85-88

Abstract: normalizing formula will result in violations of independence from irrelevant alternatives and lead to rank reversalIn the paper, the two methods that improve the original normalizing formula to erase the rank reversal

Keywords: decision     normalizing     violations of independence from irrelevant alternatives     rank preservation     rank reversal    

Research Developments and Prospects on Microseismic Source Location in Mines Review

Jiulong Cheng,Guangdong Song,Xiaoyun Sun,Laifu Wen,Fei Li

Engineering 2018, Volume 4, Issue 5,   Pages 653-660 doi: 10.1016/j.eng.2018.08.004

Abstract: Optimization of the velocity structure, along with applications of the time-reversal imaging technique, passive time-reversal mirror, and relative interferometric imaging, are expected to greatly improve

Keywords: Microseismic source location     Influencing factors     Time-reversal imaging     Research progress     Prospects for    

Project Design of a Pulsed D-D Fusion Neutron Source Based on Field Reversed Configuration

Pan Yuan , Wang Zhijiang , Wu Songtao , Zhang Ming , Chen Zhipeng , Rao Bo , Zhu Ping , Yang Yong , Ding Yonghua

Strategic Study of CAE 2022, Volume 24, Issue 3,   Pages 205-213 doi: 10.15302/J-SSCAE-2022.03.021

Abstract:

The fusion neutron source is of great significance for conducting material testing for future fusion reactors, as it can genuinely reflect the change of material properties under fusion neutron irradiation. The International Fusion Materials Irradiation Facility (IFMIF) is an accelerator-driven neutron source. It still has some differences from the ideal fusion neutron source in terms of fusion neutron energy spectrum, which has led to the reconsideration of the fusion neutron source approach. In this paper, the magnetic field configuration, heating scheme design, and related calculations are carried out regarding the fusion neutron source. The plasma temperature, density evolution process, and the corresponding neutron yield of the field reversed configuration (FRC) plasma after two-stage cascade magnetic compression are analyzed, and the suppression of the magnetic fluid instabilities such as tilted and rotating modes of the FRC plasma after considering the two-fluid effect and the finite Larmor radius effect are studied. The fundamental physical parameters of the fusion neutron source are finally given. The calculation results show that the neutron source is expected to obtain fusion neutrons with an annual average power density higher than 2 MW/m2, which can meet the requirements of material testing of the demonstration reactors (DEMO). The power estimation also shows that the scheme has the potential to become an energy source based on the pulsed deuterium-deuterium fusion.

Keywords: fusion neutron source     field reversal configuration plasma     magnetic compression     deuterium-deuterium    

Title Author Date Type Operation

Time reversal method for guided wave inspection in pipes

DENG Fei, WU Bin, HE Cunfu

Journal Article

TiO supported IrO for anode reversal tolerance in proton exchange membrane fuel cell

Journal Article

Flow, thermal, and vibration analysis using three dimensional finite element analysis for a flux reversal

B. VIDHYA,K. N. SRINIVAS

Journal Article

The effects of festivals and special events on city image design

LIU Yuan, CHEN Chong

Journal Article

A logic-based controller for the mitigation of ventilation air methane in a catalytic flow reversal reactor

Zhikai LI, Zhangfeng QIN, Yagang ZHANG, Zhiwei WU, Hui WANG, Shuna LI, Mei DONG, Weibin FAN, Jianguo WANG

Journal Article

Study on Rank Reversals in Liner Allocation Method

Zhang Ling,Zhou Dequn

Journal Article

Study on Rank Preservation of the MCDM With Normalizing Formula

Zhang Ling,Zhou Dequn,Li Hongwei,Zhu Peifeng

Journal Article

Research Developments and Prospects on Microseismic Source Location in Mines

Jiulong Cheng,Guangdong Song,Xiaoyun Sun,Laifu Wen,Fei Li

Journal Article

Project Design of a Pulsed D-D Fusion Neutron Source Based on Field Reversed Configuration

Pan Yuan , Wang Zhijiang , Wu Songtao , Zhang Ming , Chen Zhipeng , Rao Bo , Zhu Ping , Yang Yong , Ding Yonghua

Journal Article