Density logging is a well logging tool that can provide a continuous record of a formation's bulk density along the length of a borehole. In geology,...

Well logging, also known as borehole logging is the practice of making a detailed record (a well log) of the geologic formations penetrated by a borehole...

In statistics, the negative log predictive density (NLPD) is a measure of error between a model's predictions and associated true values. A smaller value...

are: nuclear porosity logs and sonic logs. The two main nuclear porosity logs are the Density and the Neutron log. Density logging tools contain a caesium-137...

distributions (a more general definition is discussed below). Given a probability density or mass function x ↦ f ( x ∣ θ ) , {\displaystyle x\mapsto f(x\mid \theta...

log PLR – pig launcher/receiver PLS – position location system PLSV – pipelay support vessel PLT – production logging tool PLTQ – production logging tool...

A caliper log is a well logging tool that provides a continuous measurement of the size and shape of a borehole along its depth and is commonly used in...

estimate is based on the simultaneous use of neutron and density logs. Under normal logging conditions, the porosity estimates obtained from these tools...

In mathematics, the Dirichlet density (or analytic density) of a set of primes, named after Peter Gustav Lejeune Dirichlet, is a measure of the size of...

spectral density), and that is why CNR estimation techniques are timely and important. In satellite communications, carrier-to-noise-density ratio (C/N0)...

Underwater logging is the process of logging trees from underwater forests. When artificial reservoirs and dams are built, large areas of forest are often...

standard normal distribution, then we have that the probability density function of the log-normal distribution is given by: f X ( x ) = d d x   P X [  ...

In number theory, natural density, also referred to as asymptotic density or arithmetic density, is one method to measure how "large" a subset of the...

Medium-density fibreboard (MDF) is an engineered wood product made by breaking down hardwood or softwood residuals into wood fibre, often in a defibrator...

Logging while drilling (LWD) is a technique of conveying well logging tools into the well borehole downhole as part of the bottom hole assembly (BHA)...

Hardboard, also called high-density fiberboard (HDF), is a type of fiberboard, which is a pressed wood or engineered wood product. It is used in furniture...

using the nearest-neighbor model. The optical density is generated from equation: Optical density= Log (Intensity of incident light / Intensity of Transmitted...

than that it is contained in the distribution's support. The probability density function of the continuous uniform distribution is f ( x ) = { 1 b − a...

this is the case, spectral gamma ray logging should be done to identify the source of these anomalies. Spectral logging is the technique of measuring the...

and geographic variables. Logging in old-growth forests is a contentious issue in many parts of the world. Excessive logging reduces biodiversity, affecting...

Whitestone Logging Camp (Lingít: Yan Kashada Tináa) is a census-designated place (CDP) on Chichagof Island in Hoonah-Angoon Census Area, Alaska, United...

equivalent to the total porosity derived from the density log when representative values for matrix and fluid density are used. The clay layers contain  OH− groups...

Chebotarev's density theorem in algebraic number theory describes statistically the splitting of primes in a given Galois extension K of the field Q {\displaystyle...

Salvage logging is the practice of logging trees in forest areas that have been damaged by wildfire, flood, severe wind, disease, insect infestation, or...

how the density of silver produced varied with the amount of light received, and the method and time of development. Plots of film density (log of opacity)...

drilling medium (most commonly drilling mud). Mud logging is usually performed by a third-party mud logging company. This provides well owners and producers...

for a real-valued random variable. The general form of its probability density function is f ( x ) = 1 2 π σ 2 e − ( x − μ ) 2 2 σ 2 . {\displaystyle...

In additive number theory, the Schnirelmann density of a sequence of numbers is a way to measure how "dense" the sequence is. It is named after Russian...

Sound energy density or sound density is the sound energy per unit volume. The SI unit of sound energy density is the pascal (Pa), which is 1 kg⋅m−1⋅s−2...

formation that it is logging. The presence of hydrocarbons (e.g. oil, natural gas, condensate) will reduce the response on an SP log because the interstitial...