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  2. Scattering parameters - Wikipedia

    en.wikipedia.org/wiki/Scattering_parameters

    Any 2-port S-parameter may be displayed on a polar diagram using polar co-ordinates. In either graphical format each S-parameter at a particular test frequency is displayed as a dot. If the measurement is a sweep across several frequencies a dot will appear for each.

  3. Non-random two-liquid model - Wikipedia

    en.wikipedia.org/wiki/Non-random_two-liquid_model

    VLE of the mixture of chloroform and methanol plus NRTL fit and extrapolation to different pressures. The non-random two-liquid model [1] (abbreviated NRTL model) is an activity coefficient model introduced by Renon and Prausnitz in 1968 that correlates the activity coefficients of a compound with its mole fractions in the liquid phase concerned.

  4. Stokes parameters - Wikipedia

    en.wikipedia.org/wiki/Stokes_parameters

    The Stokes I, Q, U and V parameters. The Stokes parameters are a set of values that describe the polarization state of electromagnetic radiation.They were defined by George Gabriel Stokes in 1851, [1] [2] as a mathematically convenient alternative to the more common description of incoherent or partially polarized radiation in terms of its total intensity (I), (fractional) degree of ...

  5. Smith chart - Wikipedia

    en.wikipedia.org/wiki/Smith_chart

    For example, if the actual radius measured from the paper was 100 mm, the length OP 1 would be 63 mm. The following table gives some similar examples of points which are plotted on the Z Smith chart. For each, the reflection coefficient is given in polar form together with the corresponding normalised impedance in rectangular form.

  6. S-matrix - Wikipedia

    en.wikipedia.org/wiki/S-matrix

    The S-matrix is closely related to the transition probability amplitude in quantum mechanics and to cross sections of various interactions; the elements (individual numerical entries) in the S-matrix are known as scattering amplitudes. Poles of the S-matrix in the complex-energy plane are identified with bound states, virtual states or resonances.

  7. Radiation pattern - Wikipedia

    en.wikipedia.org/wiki/Radiation_pattern

    A rectangular radiation plot, an alternative presentation method to a polar plot In a directional antenna in which the objective is to emit the radio waves in one particular direction, the antenna is designed to radiate most of its power in the lobe directed in the desired direction.

  8. Solvent effects - Wikipedia

    en.wikipedia.org/wiki/Solvent_effects

    A comparison of S N 1 to S N 2 reactions is to the right. On the left is an S N 1 reaction coordinate diagram. Note the decrease in ΔG ‡ activation for the polar-solvent reaction conditions. This arises from the fact that polar solvents stabilize the formation of the carbocation intermediate to a greater extent than the non-polar-solvent ...

  9. Root locus analysis - Wikipedia

    en.wikipedia.org/wiki/Root_locus_analysis

    Typically, a root locus diagram will indicate the transfer function's pole locations for varying values of the parameter . A root locus plot will be all those points in the s -plane where G ( s ) H ( s ) = − 1 {\\displaystyle G(s)H(s)=-1} for any value of K {\\displaystyle K} .