The study of body wave generated by scanning continuous laser

2020 ◽  
Author(s):  
Jing Jia ◽  
Xuanxuan Yang ◽  
Xueping jiang ◽  
Qingbang Han
Keyword(s):  
Body Wave ◽  
Continuous Laser

Transformation of the Continuous Laser Power on the Wave Length 10.6 Microns by the Thin-Wire Platinum Bolometer

2005 ◽  
Vol 63 (5) ◽  
pp. 46-471 ◽  
Author(s):  
V. M. Kuzmichov ◽  
S. V. Pogorelov ◽  
P. Kohns
Keyword(s):  
Laser Power ◽  
Wave Length ◽  
Thin Wire ◽  
Continuous Laser

Continuous laser process of welding and heat treatment for stress improvement joining

2008 ◽  
Author(s):  
Ryoichi Kuwano ◽  
Yoshiki Nagano ◽  
Tsuyoshi Tokunaga ◽  
Toshiyuki Miyazaki
Keyword(s):  
Heat Treatment ◽  
Continuous Laser ◽  
Laser Process

Blunt-body wave drag reduction using focused energy deposition

AIAA Journal ◽  
1999 ◽  
Vol 37 ◽  
pp. 460-467 ◽  
Author(s):  
David Riggins ◽  
H. F. Nelson ◽  
Eric Johnson
Keyword(s):  
Drag Reduction ◽  
Energy Deposition ◽  
Blunt Body ◽  
Body Wave ◽  
Wave Drag ◽  
Wave Drag Reduction

Determination of the profile of the temperature field of material heated by continuous laser radiation

2020 ◽  
pp. 51-10
Author(s):  
B.A. Lapshinov ◽  
◽  
N.I. Timchenko ◽  
Keyword(s):  
Temperature Field ◽  
Optical Fiber ◽  
Prolonged Exposure ◽  
Radiation Spectrum ◽  
Visible Range ◽  
Continuous Laser ◽  
Surface Temperature Distribution ◽  
Continuous Radiation ◽  
Spectral Pyrometry

Spectral pyrometry was used to determine the surface temperature distribution of Si, Nb, Cu, and graphite samples when they were locally heated by continuous radiation of an Nd:YAG laser (λ = 1.064 μm). With prolonged exposure to radiation, a stationary temperature field was established in the samples. The thermal spectra were recorded with a small spectrometer in the visible range in the temperature range above 850 K. The optical fiber used to transmit the radiation spectrum to the spectrometer had an additional diaphragm with a diameter of 1 mm located at a certain distance from the fiber end, which ensured the locality of the recorded spectra. The optical fiber moved continuously along the sample, and the spectrometer recorded up to 100 spectra with a frequency of 5-10 Hz. The temperature profile of the samples was calculated based on the results of processing the spectra using the Spectral Pyrometry program.

Investigation of the Crustal Structure in the Middle East from Body-Wave Analysis (POSTPRINT). Annual Report 2

2012 ◽  
Author(s):  
Roland Gritto ◽  
Matthew S. Sibol ◽  
Pierre Caron ◽  
Hafidh A. Ghalib ◽  
Bakir S. Ali ◽  
...  
Keyword(s):  
Middle East ◽  
Crustal Structure ◽  
Annual Report ◽  
Body Wave ◽  
Wave Analysis

scholarly journals Imaging the subsurface using induced seismicity and ambient noise: 3-D tomographic Monte Carlo joint inversion of earthquake body wave traveltimes and surface wave dispersion

2020 ◽  
Vol 222 (3) ◽  
pp. 1639-1655
Author(s):  
Xin Zhang ◽  
Corinna Roy ◽  
Andrew Curtis ◽  
Andy Nowacki ◽  
Brian Baptie
Keyword(s):  
Surface Wave ◽  
Ambient Noise ◽  
Velocity Structure ◽  
Joint Inversion ◽  
Body Wave ◽  
Source Parameters ◽  
Wave Dispersion ◽  
Inversion Method ◽  
Surface Wave Dispersion ◽  
Wave Data

SUMMARY Seismic body wave traveltime tomography and surface wave dispersion tomography have been used widely to characterize earthquakes and to study the subsurface structure of the Earth. Since these types of problem are often significantly non-linear and have non-unique solutions, Markov chain Monte Carlo methods have been used to find probabilistic solutions. Body and surface wave data are usually inverted separately to produce independent velocity models. However, body wave tomography is generally sensitive to structure around the subvolume in which earthquakes occur and produces limited resolution in the shallower Earth, whereas surface wave tomography is often sensitive to shallower structure. To better estimate subsurface properties, we therefore jointly invert for the seismic velocity structure and earthquake locations using body and surface wave data simultaneously. We apply the new joint inversion method to a mining site in the United Kingdom at which induced seismicity occurred and was recorded on a small local network of stations, and where ambient noise recordings are available from the same stations. The ambient noise is processed to obtain inter-receiver surface wave dispersion measurements which are inverted jointly with body wave arrival times from local earthquakes. The results show that by using both types of data, the earthquake source parameters and the velocity structure can be better constrained than in independent inversions. To further understand and interpret the results, we conduct synthetic tests to compare the results from body wave inversion and joint inversion. The results show that trade-offs between source parameters and velocities appear to bias results if only body wave data are used, but this issue is largely resolved by using the joint inversion method. Thus the use of ambient seismic noise and our fully non-linear inversion provides a valuable, improved method to image the subsurface velocity and seismicity.

Thermal response during volumetric ablation of carbon fiber composites under a high intensity continuous laser irradiation

2021 ◽  
Vol 23 ◽  
pp. 101032
Author(s):  
Xiao Li ◽  
Wentao Hou ◽  
Bing Han ◽  
Lingfei Xu ◽  
Zewen Li ◽  
...  
Keyword(s):  
Carbon Fiber ◽  
Laser Irradiation ◽  
High Intensity ◽  
Thermal Response ◽  
Fiber Composites ◽  
Carbon Fiber Composites ◽  
Continuous Laser
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