Results 41 to 50 of about 3,193,195 (208)

Rescue Path Planning and Simulation Analysis of Mining Robot Based on Improved A* Algorithm

open access: yesTaiyuan Ligong Daxue xuebao
Purposes The situation of post-disaster site of coal mine underground is complex. Aiming at the fact that traditional A* algorithm-based coal mine robot rescue path planning bears path insecurity, low efficiency, and other problems, and by combining with
Biying DUAN   +7 more
doaj   +1 more source

A numerical study of a method for measuring the effective in situ sound absorption coefficient [PDF]

open access: yes, 2012
The accuracy of a method [Wijnant et al., “Development and applica- tion of a new method for the in-situ measurement of sound absorption”, ISMA 31, Leuven, Belgium (2010).], for measurement of the effective area-averaged in situ sound absorption ...
André de Boer   +4 more
core   +3 more sources

Maize Germplasm Conservation in Southern California's Urban Gardens: Introduced Diversity Beyond ex situ and in situ Management. [PDF]

open access: yes, 2016
Contemporary germplasm conservation studies largely focus on ex situ and in situ management of diversity within centers of genetic diversity. Transnational migrants who transport and introduce landraces to new locations may catalyze a third type of ...
Ellstrand, Norman C, Heraty, Joanne M
core   +1 more source

Orthogonal optimization of the ratio of nano-silica sol-EVA-fly ash cement-based composite slurry and the effect on its physical properties

open access: yesMeitan xuebao
To address the problem that traditional cement-based slurry materials cannot meet the actual demand for grouting and reinforcement of large deformation roadways in coal mines, some high-performance composite slurry materials are obtained by modifying ...
Yuxu SHEN   +8 more
doaj   +1 more source

2008 Great Bay Water Quality (Datasonde) Monitoring Program [PDF]

open access: yes, 2008
In situ water quality assessment has become an important source of data for monitoring, research and management activities in estuaries nationwide. As part of the National Estuarine Research Reserve System, the Great Bay System-Wide Monitoring Program ...
Pennock, Jonathan
core   +4 more sources

Hibridación in situ fluorescente (FISH) [PDF]

open access: yes, 2016
Background: At the end of 80s, cloning technologies with the increase of the antibodies’ sensibility made easier the development of technologies based on Fluorescence in situ Hibridation (FISH).
Aguilar, Ruben, Montoro, Carolina
core  

Mechanism of mechanical strength degradation and microstructure evolution of anthracite induced by supercritical carbon dioxide

open access: yesMeitan kexue jishu
In order to reveal the effect of supercritical carbon dioxide on the mechanical strength and microstructure of anthracite in the process of CO2 injection into deep coal seams, takes anthracite as the research object, the degradation characteristics of ...
Yichao JIA   +4 more
doaj   +1 more source

Physical and mechanical characterization of the soft pyroclastic rocks forming the Orvieto cliff [PDF]

open access: yes, 2002
The paper describes the results of laboratory and in situ investigations carried out on weak pyroclastic materials which could be encountered during engineering activities in volcanic regions.
RIBACCHI, Renato   +2 more
core  

In Situ Characterization of Ultraintense Laser Pulses [PDF]

open access: yes, 2018
We present a method for determining the characteristics of an intense laser pulse by probing it with a relativistic electron beam. After an initial burst of very high-energy $\gamma$-radiation the electrons proceed to emit a series of attosecond duration
Harvey, C. N.
core   +2 more sources

Investigation into the Fracture Evolution Law of Overlying Strata Roof in Shallowly Buried “Three-Soft” Coal Seam Fully Mechanized Mining Faces and Its Influence on the Feasibility of Gob-Side Entry Retaining

open access: yesApplied Sciences
To address the feasibility of gob-side entry retaining in the shallow-buried three-soft coal seam fully mechanized mining face (SB-TSCS FMMF) of Xindeng (Zhengzhou, China) Coal Industry, we established a mechanical model of post-mining roof–coal-rock ...
Guoyou Hu   +3 more
doaj   +1 more source

Home - About - Disclaimer - Privacy