The market for process instruments generally requires low cost devices that are robust, small in size, portable, and usable in-plant. Ultrasonic torsional guided wave sensors have received much attention by researchers for measurement of viscosity and/or density of fluids in recent years. The supporting electronic systems for these sensors providing many different settings of sine-wave signals ...

using parametric approaches for qualitative assessment of land suitability is a useful method for diagnosis of land capability and potential in optimum crop production. by using such methods will hope that to achieve sustainability in based on fao land evaluation frame works and the presented tables of soil and climate requirements for agronomic crops. we studied qualitative land suitability fo...

The recently proposed full configuration interaction quantum Monte Carlo method allows access to essentially exact ground-state energies of systems of interacting fermions substantially larger than previously tractable without knowledge of the nodal structure of the ground-state wave function. We investigate the nature of the sign problem in this method and how its severity depends on the syste...

One-way wave operators are powerful tools for forward modeling and inversion. Their implementation, however, involves introduction of the square-root of an operator as a pseudo-differential operator. Furthermore, a simple factoring of the wave operator produces one-way wave equations that yield the same traveltimes of the full wave equation, but do not yield accurate amplitudes except for homog...

The method for processing of the measurement results obtained from Comite International des Poids et Measures (CIPM) Key, Regional Metrology Organizations (RMO) or supplementary comparisons, proficiency testing by interlaboratory comparisons and calibrations is proposed. It named authors as adjustment least square (LSM). Additive multiplicative parameters each measuring standard every particula...

The purpose of this work is to present and analyze the results of numerical simulations related to the application of three different mathematical models in the acoustic seismic wave propagation in which only compressional waves (P-waves) are contemplated. And present the results of an investigation about how these wave equation implementations can influence the amplitudes of a migrated section...

We define and study the totally nonnegative part of Chow quotient Grassmannian, or more simply configuration space. This space has a natural stratification by positive cells, we show that is homeomorphic to polytope as stratified establish bijections between cells following sets: (a) regular subdivisions hypersimplex into positroid polytopes, (b) set cones in tropical (c) Dressian. Our work mot...

A simple and convenient method is described for voltammetric determination of carbidopa (CD), based on its electrochemical oxidation at a modified multiwall carbon nanotube paste electrode. Under optimized conditions, the proposed method exhibited acceptable analytical performances in terms of linearity (over the concentration range from 0.1 to 700.0 μM), detection limit (65.0 nM), and reproduc...

A new method for automatic inverse filtering is presented that is derived from the “discrete all-pole modeling” (DAP) algorithm. In the new method, the parameters of a glottal flow model (the LF model) are iteratively optimized to match the inverse filtered acoustic speech wave. At the same time, the particular configuration of the LF model enters into the inverse filtering process in each iter...