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A low-finesse fiber-optic Fabry-Pérot interferometer displacement sensor has been developed and tested. The sensor consists of a singlemode fiber-optic interferometer and a high performance signal processing system. The displacement resolution of the sensor is 0.005 nm, the accuracies are 0.05 nm over dynamic range 0.005–79.1 nm and 0.5 nm over dynamic range 79.1–3200 nm, respectively.
The general problem of minimizing the maximal regret in combinatorial optimization problems with interval costs is considered. Some results are proven that allow to obtain a fully polynomial time approximation scheme (FPTAS) for the problem under the assumption that a pseudopolynomial algorithm is given.
The carbon materials used for electrochemical capacitors were reviewed and discussed the contribution of the surfaces owing to micropores and other larger pores to the capacitance and rate performance of the electric double-layer capacitors. The necessity to have an internationally accepted specification for the measurement of capacitor performance was emphasized.
Uniform spindle-type particles of iron coated with silica were obtained Buy Nike Free Canada by reduction of precursor hematite cores covered with Nike Free 4.0 V3 Womens the silica shell in hydrogen atmosphere at elevated temperatures. Magnetic properties and stability of these powders have been evaluated.