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Density measurements

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  • Density logging — Well logging Gamma ray logging Spontaneous potential logging Resistivity logging Density logging Sonic logging Caliper logging Mud logging LWD/MWD v · …   Wikipedia

  • density — one of the most common density measurements involves the determination of the geometric space occupied within the envelope of a solid material... including any interior voids, cracks or pores. This is called geometric, envelope or bulk density… …   Mechanics glossary

  • Density matrix — Mixed state redirects here. For the psychiatric condition, see Mixed state (psychiatry). In quantum mechanics, a density matrix is a self adjoint (or Hermitian) positive semidefinite matrix (possibly infinite dimensional) of trace one, that… …   Wikipedia

  • Density of states — Condensed matter physics Phases · Phase tr …   Wikipedia

  • Density — This article is about mass density. For other uses, see Density (disambiguation). The mass density or density of a material is defined as its mass per unit volume. The symbol most often used for density is ρ (the Greek letter rho). In some cases… …   Wikipedia

  • bone density — A measure of the amount of calcium contained in a certain volume of bone. Calcium gives bones their strength and helps keep them from breaking. Bone density measurements may be used to diagnose osteoporosis, to see how well osteoporosis… …   English dictionary of cancer terms

  • bone mineral density — BMD. A measure of the amount of calcium contained in a certain volume of bone. Calcium gives bones their strength and helps keep them from breaking. Bone mineral density measurements may be used to diagnose osteoporosis, to see how well… …   English dictionary of cancer terms

  • Relative density — Relative density, sometimes called specific density, is the ratio of the density of a substance to the density of a given reference material. If a substance s relative density is less than one then it is less dense than the reference; if greater… …   Wikipedia

  • Silt Density Index — The silt density index is a measure for the fouling capacity of water in reverse osmosis systems. SDI values below 5 result in low fouling rates. The Silt Density Index (SDI) test is used to determine the fouling potential of waterfeeding a… …   Wikipedia

  • Multivariate kernel density estimation — Kernel density estimation is a nonparametric technique for density estimation i.e., estimation of probability density functions, which is one of the fundamental questions in statistics. It can be viewed as a generalisation of histogram density… …   Wikipedia

  • Particle density — The particle density or true density of a particulate solid or powder, is the density of the particles that make up the powder, in contrast to the bulk density, which measures the average density of a large volume of the powder in a specific… …   Wikipedia

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