Results 31 to 40 of about 3,193,195 (208)

Fracture Evolution Mechanisms and Roof Failure Assessment in Shallow-Buried Soft Coal Seams Under Fully Mechanized Caving Mining

open access: yesApplied Sciences
To address the challenges in the collaborative control of strong mine pressure and surface damage during fully mechanized shallow soft coal seam top-coal caving mining, this study takes the 22,031 working face of Xindeng (Zhengzhou, China) Coal Mine as ...
Yongkang Yang   +4 more
doaj   +1 more source

Study on the effect of microbial agent M44 on straw decay promoting in cold soils

open access: yesScientific Reports
Compound microbial agents are an important means to optimize soil quality and maintain soil microbial activity. When supplemented with microbial agents, straw returned to a field shows improved degradation efficiency and hence better nutrient release ...
Lijie Wang   +7 more
doaj   +1 more source

Design of a Verification Device of Motor Axle Wheel Load Scales Based on Pump-Controlled Hydraulic Cylinder

open access: yesSensors
Vehicle axle load scales are one of the most important devices for vehicle safety testing. To ensure the stability and reliability of test results, regular calibration of axle load scales is necessary.
Long Hao   +3 more
doaj   +1 more source

Experimental Study on the Effect of Thermal Shock on Physical and Mechanical Properties of Limestone

open access: yesApplied Sciences, 2023
Thermal shock is the physical process of rapid cooling of a hot object. The physical and mechanical properties of rocks that have undergone thermal shock will change.
Yunsheng Dong   +3 more
doaj   +1 more source

In situ hybridization

open access: yesMolecular and Cellular Probes, 1987
In situ hybridization is the hybridization-mediated detection of specific nucleic acid sequences within structurally intact cells or tissues. As such it uniquely provides localization of nucleic acid superimposed on observable cellular and subcellular structural detail, allowing analysis unobtainable by other hybridization techniques.
openaire   +2 more sources

In-situ Co2 Current Efficiency Measurement of Direct Ethanol Fuel Cell [PDF]

open access: yes, 2012
In this present work, we carry out systematically study on catalyst for ethanol electrooxidation in direct ethanol fuel cell. For cathode catalyst we use a commercial catalyst of 40% Pt/C from ETEK.
hariyanto, H. (hariyanto)
core  

Influence of Amplitude-phase Error on MVDR Beamforming of Volume Array

open access: yes水下无人系统学报
Volume array is a kind of three-dimensional array composed of multiple hydrophones, which can increase the aperture of the receiving array of the submarine target and obtain a large spatial gain.
Yan HUANG   +3 more
doaj   +1 more source

Green manuring for tropical organic cropping – A comparative analysis [PDF]

open access: yes, 2008
Green manuring is an essential component of tropical organic farming. Field studies evaluated the use of three legumes as in situ or ex situ green manures, along with a nonlegume green manure and a control to ascertain their impacts on soil properties ...
Freyer, Prof.Dr. Bernhard   +2 more
core  

Preparation of Nanocomposites from Styrene and Modified Graphite Oxides [PDF]

open access: yes, 2004
Graphite oxide was prepared and modified with several ammonium salts and these modified graphite oxides were used to prepare nanocomposites with polystyrene by in situ polymerization of styrene monomer and by melt blending with polystyrene ...
Uhl, Fawn Marie, Wilkie, Charles A.
core   +2 more sources

Effect of long reaction distance on gas composition from organic-rich shale pyrolysis under high-temperature steam environment

open access: yesInternational Journal of Coal Science & Technology
When high-temperature steam is used as a medium to pyrolyze organic-rich shale, water steam not only acts as heat transfer but also participates in the chemical reaction of organic matter pyrolysis, thus affecting the generation law and release ...
Lei Wang   +6 more
doaj   +1 more source

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