Results 21 to 30 of about 3,543,765 (356)

Gray Relational Analysis Optimization for Coalbed Methane Blocks in Complex Conditions Based on a Best Worst and Entropy Method

open access: yesApplied Sciences, 2019
The uncertainty and complexity of the geological parameters of coalbed methane (CBM) reservoirs may result in the assignment of atypical exact values to a whole block.
Guofei Zhao   +4 more
doaj   +1 more source

An Improved Algorithm for Measuring Nitrate Concentrations in Seawater Based on Deep-Ultraviolet Spectrophotometry: A Case Study of the Aoshan Bay Seawater and Western Pacific Seawater

open access: yesSensors, 2021
Nowadays, it is still a challenge for commercial nitrate sensors to meet the requirement of high accuracy in a complex water. Based on deep-ultraviolet spectral analysis and a regression algorithm, a different measuring method for obtaining the ...
Xingyue Zhu   +4 more
doaj   +1 more source

Characteristics of oil and gas production of oil shale pyrolysis by water vapor injection [PDF]

open access: yesOil Shale, 2022
An appropriate pyrolysis temperature is required to achieve the best-quality oil and gas products via kerogen pyrolysis for the application of the in situ shale exploitation technology.
Jing Zhao   +3 more
doaj   +1 more source

In situ hybridization, in situ transcription, and in situ polymerase chain reaction. [PDF]

open access: yesScanning microscopy. Supplement, 1996
In situ hybridization, in situ transcription, and in situ polymerase chain reaction (PCR) are techniques used to detect DNA and RNA sequences within a cell or tissue structure. These three in situ methodologies employ the principles of recombinant DNA to form double-stranded hybrids of DNA-DNA, DNA-RNA, or RNA-RNA. The essence of in situ hybridization (
De Bault, L. E., Gu, J.
openaire   +1 more source

Lotus Leaf-Inspired Corrosion-Resistant and Robust Superhydrophobic Coating for Oil–Water Separation

open access: yesBiomimetics
With daily oil consumption approaching 100 million barrels, the global demand continues to generate significant quantities of oily wastewater during oil extraction, refining, and transportation, and the development of effective oil–water separation ...
Wenhui Tu   +7 more
doaj   +1 more source

Comparative study of in situ and ex situ MgB2 films deposited by pulsed laser deposition

open access: yes, 2003
Two types of MgB2 films were prepared by pulsed laser deposition (PLD) with in situ and ex situ annealing processes respectively. Significant differences in properties between the two types of films were found.
Bugoslavsky Y   +6 more
core   +1 more source

Prediction of in situ strengths and matrix cracking in composites under transverse tension and in-plane shear [PDF]

open access: yes, 2006
A criterion for matrix failure of laminated composite plies in transverse tension and in-plane shear is developed by examining the mechanics of transverse matrix crack growth.
Allen   +39 more
core   +1 more source

Cooperative load‐bearing characteristics of a pillar group and a gob pile in partially caved areas at shallow depth

open access: yesEnergy Science & Engineering, 2020
Stress concentration in partially caved goaf is the main cause of dynamic pressure accident in the lower seam mining. Aimed at the characteristics of caving in shallow partially caved goaf (PCG) and the specificity of interior load‐bearing structures, a ...
Defu Zhu   +5 more
doaj   +1 more source

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

Revealing the structure of land plant photosystem II: the journey from negative‐stain EM to cryo‐EM

open access: yesFEBS Letters, EarlyView.
Advances in cryo‐EM have revealed the detailed structure of Photosystem II, a key protein complex driving photosynthesis. This review traces the journey from early low‐resolution images to high‐resolution models, highlighting how these discoveries deepen our understanding of light harvesting and energy conversion in plants.
Roman Kouřil
wiley   +1 more source

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