The weight vector theory for Coriolis flow meters has been the subject of research presented by Hemp and co-workers in various articles. The underlying theory may not be easily understood. This paper explains the application of the weight vector theory for Coriolis flowmeters. The theory is applied to simple theoretical meter configurations consisting of a single straight pipe. The application of the weight vector approach is of relevance when investigating velocity profile effects, e.g., in Coriolis flow meters. Promising results have been found in recent literature showing the vulnerability of straight pipe Coriolis flowmeter configurations to velocity profile effects. The application of the weight vector theory is shown to be either limited to the investigation of few parameters or employs unrealistic boundary conditions and lacks comparative studies, making a more comprehensive study desirable. The usefulness of the weight vector theory to predict velocity profile effects for bended tube is not apparent from today's state-of-the-art literature, but of great interest for flowmeter manufacturers since bended tubes designs are frequently used in today's Coriolis flowmeters.

The present contribution is focused on the measurement of the degradation induced in the case of two splitters and two attenuators used in optical fiber communication systems, under gamma and neutron irradiation. The measurements were carried out at specific wavelengths (λ = 1310 nm and λ = 1550 nm) or over a spectral band (λ = 1510 - 1620 nm), in order to evaluate the wavelength dependence of the phenomena. These components were also tested as it concerns the changes of the polarization state of optical radiation they guide. A second investigation was performed on the degradation of the operational parameters for a laser diode driving circuit and a Peltier TEC (thermoelectric cooler), under gamma-ray, neutron and electron beam irradiation. No significant changes were noticed in the spectral transmission of the two passive components, but the degradation of the light polarization parameters was a significant one under gamma-ray irradiation. In the case of the laser diode drivers a drop of 80 % of the laser diode optical power and the embedded photodiode responsivity was observed under gamma-ray and neutron irradiation.

Windows are frequently used in digital signal processing, mainly for leakage reduction in non-coherent sampling (spectral analysis, detection of weak harmonic components close to a strong harmonic components, e.g. in ADC testing) or in FIR digital filter design. Many windows are described and compared in literature. This paper informs about a mathematical instrument and an algorithm allowing design of several classes of cosine windows with various prescribed properties. The design is based on iterative window spectrum zeros placing. Window coefficients are presented either as high-accuracy decimal numbers or in a more compact form of ratios. The proposed algorithm can be implemented using any computing instrument; we have selected Matlab environment. The designed Graphical User Interface allows easy inserting of required window spectrum properties and presentation of resulting window coefficients, window spectrum and window shape in time domain. The method allows design of all three window classes of Rife and Vincent windows (up to the window order 10) but allows also design of windows with different properties, corresponding to some newly defined window classes. Both symmetrical and periodic (DFT) windows can be designed. The principle of the method is described and definitions of the new window classes and examples of designed windows are presented.

Radiofrequency methods and devices for on-line measurement of technological parameters of liquefied petroleum gas (LPG) in a pipeline are suggested. RF temperature-independent LPG density measuring device is considered. Designed automated system for determination of LPG density and water content under LPG pipeline transportation and water removal from LPG is described.

The calibration of radiation thermometers requires knowledge of the target size effect on the thermometer output, namely the size of source effect (SSE). The measurement of an instrument SSE allows to calculate a correction, or an estimation for this source of uncertainty. For a correct determination of SSE it is necessary to use large aperture radiation sources of uniform spectral radiance. We show here an experimental system to measure SSE at high temperature (up to 600 °C) with an enough large aperture of broad band radiation thermometer with output in terms of temperature.