Results 21 to 30 of about 4,834,015 (307)

Parameters Optimization of Electrical Discharge Machining Process Using Swarm Intelligence: A Review

open access: yesMetals, 2023
Electrical discharge machining (EDM) can use soft tool electrodes to process hard workpieces to achieve “soft against hard”, because it directly uses electrical energy and thermal energy to remove metal materials.
Yanyan Chen   +5 more
doaj   +1 more source

Spatiotemporal characteristic analysis of PM2.5 in central China and modeling of driving factors based on MGWR: a case study of Henan Province

open access: yesFrontiers in Public Health, 2023
Since the start of the twenty-first century, China's economy has grown at a high or moderate rate, and air pollution has become increasingly severe. The study was conducted using data from remote sensing observations between 1998 and 2019, employing the ...
Hua Wang   +3 more
doaj   +1 more source

TeCre: A Novel Temporal Conflict Resolution Method Based on Temporal Knowledge Graph Embedding

open access: yesInformation, 2023
Since the facts in the knowledge graph (KG) cannot be updated automatically over time, some facts have temporal conflicts. To discover and eliminate the temporal conflicts in the KG, this paper proposes a novel temporal conflict resolution method based ...
Jiangtao Ma   +5 more
doaj   +1 more source

PHYSICOCHEMICAL PROPERTIES OF THE WATER DEPLETED OF HEAVY ISOTOPES [PDF]

open access: yesChemistry Journal of Moldova: General, Industrial and Ecological Chemistry, 2012
Data on physicochemical properties of the light water (deuterium concentration is reduced to the ratio D/H = 4 ppm and that of the isotope of oxygen 18 – to the ratio 18O/16O = 750 ppm) have been obtained.
Vladislav V. Goncharuk
doaj  

Reduced heat flow in light water (H2O) due to heavy water (D2O)

open access: yes, 2008
The flow of heat, from top to bottom, in a column of light water can be decreased by over 1000% with the addition of heavy water. A column of light water cools from 25 C to 0 C in 11 hours, however, with the addition of heavy water it takes more than 100
Brownridge, James D., Gorman, William R.
core   +1 more source

Long term trend of chemical oxygen demand in Saroma-ko Lagoon, Japan; possible effects of climatic warming [PDF]

open access: yes, 2008
A trend of shortening duration of ice coverage has been reported in many rivers, ponds and lakes around the world due to climatic warming. The shortening will have much influence on organic production due to the greater supply of light intensity and ...
Akihiro Shiomoto
core   +2 more sources

Study of wavelength-shifting chemicals for use in large-scale water Cherenkov detectors

open access: yes, 2011
Cherenkov detectors employ various methods to maximize light collection at the photomultiplier tubes (PMTs). These generally involve the use of highly reflective materials lining the interior of the detector, reflective materials around the PMTs, or ...
A. Bernstein   +12 more
core   +2 more sources

Measurements of group velocity of light in the lake Baikal water [PDF]

open access: yes, 2002
The results of direct measurements of group velocity of light in the lake Baikal water at the depth of 1100 m are presented. The lake Baikal water dispersion has been measured at three wavelengths: 370 nm, 470 nm and 525 nm.
B.K. Lubsandorzhiev   +9 more
core   +2 more sources

Monte Carlo Radiative Transfer Simulations on the Influence of Surface Waves on Underwater Light Fields [PDF]

open access: yes, 2010
A Monte Carlo model has been developed for calculating the penetration of light into the ocean. For monochromatic light (490 nm) the spatial exact allocation of the scattered parts of underwater light is described in terms of the variation of particle ...
Hieronymi, Martin, Macke, Andreas
core  

Ecology of a reef forming serpulid, Hydroides norvegica : final report [PDF]

open access: yes, 1970
Experimental results reported herein were obtained on colonies of serpulid worms collected from a filter box (Fig. 1) through which water was pumped at a rate of about 1,000 gallons per day.
Behrens, E. W. (Earl William), 1935-
core   +1 more source

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