Results 51 to 60 of about 441,091 (198)

Response Characteristics of Coal-Like Material Subjected to Repeated Hydraulic Fracturing: An Evaluation Based on Real-Time Monitoring of Water Injection Pressure and Roof Stress Distribution

open access: yesShock and Vibration, 2021
Conventional hydraulic fracturing has several disadvantages, including a short effective extraction time and low fracture conductivity during long-term extraction.
Yongjiang Zhang   +2 more
doaj   +1 more source

X-ray properties of UV-selected star forming galaxies at z~1 in the Hubble Deep Field North

open access: yes, 2005
We present an analysis of the X-ray emission from a large sample of ultraviolet (UV) selected, star forming galaxies with 0 ...
Adelberger, K. L.   +4 more
core   +1 more source

The Periodic Standing-Wave Approximation: Overview and Three Dimensional Scalar Models [PDF]

open access: yes, 2003
The periodic standing-wave method for binary inspiral computes the exact numerical solution for periodic binary motion with standing gravitational waves, and uses it as an approximation to slow binary inspiral with outgoing waves.
Alexey Blinov   +16 more
core   +2 more sources

Automated Lensing Learner: Automated Strong Lensing Identification with a Computer Vision Technique [PDF]

open access: yes, 2019
Forthcoming surveys such as the Large Synoptic Survey Telescope (LSST) and Euclid necessitate automatic and efficient identification methods of strong lensing systems. We present a strong lensing identification approach that utilizes a feature extraction
Avestruz, Camille   +5 more
core   +2 more sources

Research on pre-pumping gas control technology for large-diameter borehole

open access: yes矿业科学学报
The large quarry face with a strike length of 3 300 m in Sijiazhuang Mine features high gas reserve, large gas outflow and its upper corner is easy to exceed the limit.This study adopts the gas management technology of extracting the gas from the coal ...
XIE Jun
doaj   +1 more source

Morphological Characteristics of Hydraulic Flushing under Multifactor Coupling and Its Enlightenment

open access: yesGeofluids, 2022
The shape of the hydraulic flushing hole is an important basis to determine the effective pumping radius. In the design and evaluation of the drilling hole, it is usually equivalent to a cylinder.
Xiao Liu   +5 more
doaj   +1 more source

The spectrum of the recycled PSR J0437-4715 and its white dwarf companion

open access: yes, 2011
We present extensive spectral and photometric observations of the recycled pulsar/white-dwarf binary containing PSR J0437-4715, which we analyzed together with archival X-ray and gamma-ray data, to obtain the complete mid-infrared to gamma-ray spectrum ...
Abdo   +43 more
core   +1 more source

On choosing the start time of binary black hole ringdown [PDF]

open access: yes, 2017
The final stage of a binary black hole merger is ringdown, in which the system is described by a Kerr black hole with quasinormal mode perturbations. It is far from straightforward to identify the time at which the ringdown begins.
Ballmer, Stefan W.   +6 more
core   +3 more sources

Probing the top-quark width through ratios of resonance contributions of $e^+e^-\rightarrow W^+W^-b\bar{b}$ [PDF]

open access: yes, 2015
We exploit offshell regions in the process $e^+e^-\rightarrow W^+W^-b\bar{b}$ to gain access to the top-quark width. Working at next-to-leading order in QCD we show that carefully selected ratios of offshell regions to onshell regions in the ...
Liebler, Stefan   +2 more
core   +2 more sources

Detection of Bulk Motions in the ICM of the Centaurus Cluster [PDF]

open access: yes, 2001
Several recent numerical simulations of off-center cluster mergers predict that significant angular momentum with associated velocities of a few x 10^{3} km/s can be imparted to the resulting cluster.
Allen S. W.   +17 more
core   +2 more sources

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