The slope difference between the two surfaces is a physical magnitude that needs to be measured in areas such as therapy diagnoses, construction, machinery, geology, geophysics, sports sciences, orthopedics. One of devices used measure inclination wireless inclinometer. inclinometer allows you find surface relative ground. Inclinometers are widely biomedical device, especially field therapy. th...

To overcome the limitations of the traditional dual mixer time difference methods, a digital frequency measurement method is proposed in this paper, and a novel frequency standard comparator is developed which bases on dual CPU. For 10 MHz frequency standard, the background noise of the system is better than 1E-12/1s. By virtue of the introductions of the sinusoidal beat technique, the simultan...

An original technique that combines digital holography, dual illumination of the sample and cleaning algorithm 3D reconstruction is proposed. It uses a standard transmission microscopy setup coupled with a digital holography detection. The technique is 4D, since it allows to determine, at each time step, the 3D locations (x,y,z) of many moving objects that scatter the dual illumination beam. Th...

we introduce the notions of t-dual rickart and strongly t-dual rickart modules. we provide several characterizations and investigate properties of each of these concepts. it is shown that every free (resp. finitely generated free) $r$-module is t-dual rickart if and only if $overline{z}^2(r)$ is a  direct summand of $r$ and end$(overline{z}^2(r))$ is a semisimple (resp. regular) ring. it is sho...