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The inversion of the resistivity and IP data is conducted by least-square method involving finite-element and finite-difference methods. Supports exact and approximate least-squares optimisation methods Supports smooth and sharp constrasts inversions Supports up to 16000 electrodes and 21000 data points on computers with 1GB RAM Seamless inversion of very long survey lines using sparse inversion techniques (RES2DINV only license includes limited used of RES3DINV 3D inversion program) RES2DINV software is designed to interpolate and interpret field data of electrical geophysical prospecting (2D sounding) of electrical resistivity (conductivity) and induced polarization.

1 Exponential Probability Density Function.Supports on land, underwater and cross-borehole surveys Supports the Wenner (alpha,beta,gamma), Wenner-Schlumberger, pole-pole, pole-dipole, inline dipole-dipole, equatorial dipole-dipole, gradient and non-conventional arrays.

1.2 The 1-Parameter Exponential Distribution This function uses the exponential distribution of the form f(t) exp(- t) to get the inverse CDF F(-1)(u)(-log(1-u))/.1.1 The 2-Parameter Exponential Distribution. It can be implemented directly and is also called by the function expmemsim.

3.1 The Effect of lambda and gamma on the Exponential pdf.ģ Characteristics of the Exponential Distribution.2.8 The Exponential Failure Rate Function.2.7 The Exponential Reliable Life Function.2.6 The Exponential Conditional Reliability Function.2.5 The Exponential Reliability Function.Output is a value or a vector of values from the exponential distribution.3.2 The Effect of lambda and gamma on the Exponential Reliability Function.3.3 The Effect of lambda and gamma on the Failure Rate Function.4 Estimation of the Exponential Parameters.5.2.2.2 Example: LR Bounds on Reliability.The exponential distribution is a commonly used distribution in reliability engineering. Mathematically, it is a fairly simple distribution, which many times leads to its use in inappropriate situations.

The exponential distribution is used to model the behavior of units that have a constant failure rate (or units that do not degrade with time or wear out).Įxponential Probability Density Function The 2-Parameter Exponential Distribution It is, in fact, a special case of the Weibull distribution where \beta =1\,\!. The 2-parameter exponential pdf is given by:į(t)=\lambda \,\!, or of one MTTF duration, is always equal to 0.3679\,\! or 36.79%.