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Jiayao Zhang, Dongdong Gu, Ying Yang, Hongmei Zhang, Hongyu Chen, Donghuai Dai, Kaijie Lin
Engineering 2019, Volume 5, Issue 4, Pages 736-745 doi: 10.1016/j.eng.2019.07.003
A three-dimensional laser absorption model based on ray tracing was established to describe the coupledThis work provides a scientific basis for the application of the ray-tracing model to predict the wetting
Keywords: Selective laser melting (SLM) Tungsten Ray-tracing model Absorptivity Laser scanning tracks
Ray-triangular Bézier patch intersection using hybrid clipping algorithm Article
Yan-hong LIU,Juan CAO,Zhong-gui CHEN,Xiao-ming ZENG
Frontiers of Information Technology & Electronic Engineering 2016, Volume 17, Issue 10, Pages 1018-1030 doi: 10.1631/FITEE.1500390
Keywords: Ray tracing Triangular Bé zier surface Ray-patch intersection Root-finding Hybrid clipping
Machine learning based altitude-dependent empirical LoS probability model for air-to-ground communications Research Article
Minghui PANG, Qiuming ZHU, Zhipeng LIN, Fei BAI, Yue TIAN, Zhuo LI, Xiaomin CHEN
Frontiers of Information Technology & Electronic Engineering 2022, Volume 23, Issue 9, Pages 1378-1389 doi: 10.1631/FITEE.2200041
Keywords: Line-of-sight probability model Air-to-ground channel Machine learning Ray tracing
Xiliang ZHANG, Zhiying CUI, Jianhan ZHANG, Fengwu BAI, Zhifeng WANG
Frontiers in Energy 2019, Volume 13, Issue 3, Pages 590-596 doi: 10.1007/s11708-018-0602-y
Keywords: secondary parabolic trough solar concentrator ray tracing method linear focus concentration ratio optical
Early Identification of Abnormal Regions in Rock-Mass Using Traveltime Tomography Article
Longjun Dong,Zhongwei Pei,Xin Xie,Yihan Zhang,Xianhang Yan
Engineering 2023, Volume 22, Issue 3, Pages 191-200 doi: 10.1016/j.eng.2022.05.016
Early identification of abnormal regions is crucial in preventing the occurrence of underground geotechnical disasters. To meet the high-accuracy detection requirements of underground engineering, this paper proposes a tomography method for abnormal region identification in complex rock-mass structures that utilizes traveltime tomography combined with the damped least-squares method and Gaussian filtering. The proposed method overcomes the limitation of velocity difference in empty region detection and mitigates the impact from isolated velocity mutation in the iteration. Numerical and laboratory experiments were conducted to evaluate the identification accuracy and computational efficiency of forward modeling, including the shortest-path method (SPM), dynamic SPM (DSPM), and fast sweeping method (FSM). The results show that DSPM and FSM can clearly detect abnormal regions in numerical and laboratory experiments. Field experiments were conducted in the Shaanxi Zhènào mine and achieve the reconstruction of the underground roadway distribution. This paper not only realizes the application of abnormal region identification using traveltime tomography but also provides new insight into potential hazards detection in underground geotechnical engineering.
Keywords: Underground engineering Traveltime tomography Complex structures Abnormal region identification Raytracing
Toshifumi MUKUNOKI, Naoko KUMANO, Jun OTANI
Frontiers of Structural and Civil Engineering 2012, Volume 6, Issue 2, Pages 85-100 doi: 10.1007/s11709-012-0159-5
Keywords: relative density grain property model test road subsidence underground pipe image processing X-ray CT
Sensory innervation of the anterior eye segment in rats: a retrograde tracing study
Haixia LIU MD , Zhiwang LI MD , Min YANG MD , Xiang TIAN MS , Chaoying LI PhD , Lei PEI PhD ,
Frontiers of Medicine 2009, Volume 3, Issue 3, Pages 352-356 doi: 10.1007/s11684-009-0065-y
Keywords: trigeminal ganglion retrograde tracing
A study on quality evaluation for bituminous mixture using X-ray CT
Satoshi TANIGUCHI, Keiichiro OGAWA, Jun OTANI, Itaru NISHIZAKI
Frontiers of Structural and Civil Engineering 2013, Volume 7, Issue 2, Pages 89-101 doi: 10.1007/s11709-013-0197-7
Keywords: asphalt concrete mixture aggregate bitumen bitumen content quality evaluation X-ray CT
Adsorption of fluoride on clay minerals and their mechanisms using X-ray photoelectron spectroscopy
Junyi DU, Daishe WU, Huayun XIAO, Ping LI
Frontiers of Environmental Science & Engineering 2011, Volume 5, Issue 2, Pages 212-226 doi: 10.1007/s11783-010-0255-5
Keywords: clay mineral fluoride (F) adsorption mechanism X-ray photoelectron spectroscopy (XPS)
Ray, Ajay K Ray, Tianyin Huang, Jiabin Chen
Frontiers of Environmental Science & Engineering 2019, Volume 13, Issue 5, doi: 10.1007/s11783-019-1159-7
Keywords: Algae Coagulation-flocculation Response surface methodology Artificial neural networks
Establishing two-stage interaction between fly ash and NaOH by X-ray and infrared analyses
Bhagwanjee JHA,Nevin KOSHY,Devendra Narain SINGH
Frontiers of Environmental Science & Engineering 2015, Volume 9, Issue 2, Pages 216-221 doi: 10.1007/s11783-014-0630-8
Keywords: hydrothermal treatment alkali activation fly ash zeolites X-ray diffraction (XRD) and Fourier transform-infrared
Application of gamma-ray attenuation technology in density measurement of a slurry reactor
Jian XU, Weisheng WEI, Kai ZHANG
Frontiers of Chemical Science and Engineering 2010, Volume 4, Issue 4, Pages 486-490 doi: 10.1007/s11705-010-0509-6
Keywords: slurry reactor axial density distribution gamma-ray attenuation technology
Heat Integration retrofit analysis—an oil refinery case study by Retrofit Tracing Grid Diagram
Andreja NEMET, Jiří Jaromír KLEMEŠ, Petar Sabev VARBANOV, Valter MANTELLI
Frontiers of Chemical Science and Engineering 2015, Volume 9, Issue 2, Pages 163-182 doi: 10.1007/s11705-015-1520-8
Keywords: Heat Integration retrofit Pinch Analysis thermodynamic approach oil refinery
Nebojsa S. MARINKOVIC, Kotaro SASAKI, Radoslav R. ADZIC
Frontiers in Energy 2017, Volume 11, Issue 3, Pages 236-244 doi: 10.1007/s11708-017-0487-1
Keywords: X-ray absorption spectroscopy EXAFS XANES nanocatalysts core shell
Error analysis of the parameters for non-coaxial grazing X-ray microscope
ZHAO Lingling, HU Jiasheng, LI Xiang
Frontiers of Mechanical Engineering 2007, Volume 2, Issue 3, Pages 323-329 doi: 10.1007/s11465-007-0057-z
Keywords: non-coaxial spherical manufacturing necessary diagnosis
Title Author Date Type Operation
Influence of Particle Size on Laser Absorption and Scanning Track Formation Mechanisms of Pure Tungsten Powder during Selective Laser Melting
Jiayao Zhang, Dongdong Gu, Ying Yang, Hongmei Zhang, Hongyu Chen, Donghuai Dai, Kaijie Lin
Journal Article
Ray-triangular Bézier patch intersection using hybrid clipping algorithm
Yan-hong LIU,Juan CAO,Zhong-gui CHEN,Xiao-ming ZENG
Journal Article
Machine learning based altitude-dependent empirical LoS probability model for air-to-ground communications
Minghui PANG, Qiuming ZHU, Zhipeng LIN, Fei BAI, Yue TIAN, Zhuo LI, Xiaomin CHEN
Journal Article
Optical performance analysis of an innovative linear focus secondary trough solar concentrating system
Xiliang ZHANG, Zhiying CUI, Jianhan ZHANG, Fengwu BAI, Zhifeng WANG
Journal Article
Early Identification of Abnormal Regions in Rock-Mass Using Traveltime Tomography
Longjun Dong,Zhongwei Pei,Xin Xie,Yihan Zhang,Xianhang Yan
Journal Article
analysis of soil failure on defective underground pipe due to cyclic water supply and drainage using X-ray
Toshifumi MUKUNOKI, Naoko KUMANO, Jun OTANI
Journal Article
Sensory innervation of the anterior eye segment in rats: a retrograde tracing study
Haixia LIU MD , Zhiwang LI MD , Min YANG MD , Xiang TIAN MS , Chaoying LI PhD , Lei PEI PhD ,
Journal Article
A study on quality evaluation for bituminous mixture using X-ray CT
Satoshi TANIGUCHI, Keiichiro OGAWA, Jun OTANI, Itaru NISHIZAKI
Journal Article
Adsorption of fluoride on clay minerals and their mechanisms using X-ray photoelectron spectroscopy
Junyi DU, Daishe WU, Huayun XIAO, Ping LI
Journal Article
Optimization and modeling of coagulation-flocculation to remove algae and organic matter from surface water by response surface methodology
Ray, Ajay K Ray, Tianyin Huang, Jiabin Chen
Journal Article
Establishing two-stage interaction between fly ash and NaOH by X-ray and infrared analyses
Bhagwanjee JHA,Nevin KOSHY,Devendra Narain SINGH
Journal Article
Application of gamma-ray attenuation technology in density measurement of a slurry reactor
Jian XU, Weisheng WEI, Kai ZHANG
Journal Article
Heat Integration retrofit analysis—an oil refinery case study by Retrofit Tracing Grid Diagram
Andreja NEMET, Jiří Jaromír KLEMEŠ, Petar Sabev VARBANOV, Valter MANTELLI
Journal Article
Design of efficient Pt-based electrocatalysts through characterization by X-ray absorption spectroscopy
Nebojsa S. MARINKOVIC, Kotaro SASAKI, Radoslav R. ADZIC
Journal Article