37results about How to "Broad" patented technology

Zero volt switching during a light load is performed in such a manner that through an ON / OFF control of switches provided for a full bridge circuit and the synchronous rectifier switches in a rectifier and smoothing circuit, a resonant peak voltage necessary for the zero voltage switching determined by the output current flowing to output terminals, a resonant inductor and a resonant capacitor capacitance is ensured so that an energy accumulated in the rectifier and smoothing circuit is returned to the full bridge circuit so as to act as equivalent as when the output current is increased and to increase the current flowing through the full bridge circuit.

The musical or striking watch is provided with an acoustic radiation arrangement. The watch includes a watch case, formed at least of a case middle and a back cover removably fixed to the case middle, and at least one crystal for closing said case. The acoustic radiation arrangement includes a connecting support part fixed in the case back between a back bezel and a back crystal. The back bezel includes several lateral openings. A cavity is defined between the connecting support part and the openings in the back bezel.

The invention relates to a method for producing synthetic rutile by using ilmentie, in particular to a method for producing synthetic rutile by using deluvial slope type ilmentie. The method comprises the following steps of: performing reduction treatment on the deluvial slope type ilmentie, wherein reducing agents are coal, tar and the like; controlling a reduction temperature and a reduction time; performing oxidation treatment on the reduced ilmentie at the temperature of between 700 and 900 DEG C until a shell of rutile microcrystal and a ferric layer is generated on a mineral surface, wherein an oxidant is oxygen; performing atmospheric multi-segment counterflow fluidization leaching on the oxidized ilmentie by using diluted hydrochloric acid, controlling a concentration of the diluted hydrochloric acid and an acid leaching temperature, and then removing soluble impurities in the ilmentie after more than three segments of leaching; and then washing, filtering, drying and roastingthe leached material after being subjected to acid leaching to obtain the synthetic rutile. The method has the advantages of preventing pulverization, keeping a crude ore grain size, along high acid leaching efficiency, high use ratio, simple process, low cost and easy operation.

The present invention relates to a ferrite-based catalyst composite, a method of preparing the same, and a method of preparing butadiene using the same. More particularly, the present invention provides a ferrite-based catalyst composite having a shape that allows effective dispersion of excess heat generated in a butadiene production process and prevention of catalyst damage and side reaction occurrence by reducing direct exposure of a catalyst to heat, a method of preparing the ferrite-based catalyst composite, and a method of preparing butadiene capable of lowering the temperature of a hot spot and reducing generation of Cox by allowing active sites of a catalyst to have a broad temperature gradient (profile) during oxidative dehydrogenation using the ferrite-based catalyst composite, and thus, providing improved process efficiency.

Provided are a high-speed optical modulator and a method of modulating light by using the same. The optical modulator includes first and second resonance cavities that are sequentially stacked on a transparent substrate, wherein the first and second resonance cavities each include an electric-optical layer. According to the method, first and second voltages having different sizes are simultaneously applied respectively to the first and second resonance cavities, and then for the other configuration of the modulator mutually interchanged voltages are applied.

There is provided an acoustic radiating membrane arrangement for a striking or musical watch. The arrangement includes a first membrane arranged superposed on a second membrane. Peripheral edge portions of the two membranes are intended to hold the membranes inside a watch case. The first acoustic radiating membrane is configured to radiate efficiently the frequencies in a first frequency band. The second acoustic radiating membrane is configured to radiate efficiently the frequencies in a second frequency band that is different from the first frequency band. A spacer ring is also disposed between the peripheral edge portions of the first membrane and of the second membrane to define an acoustic cavity.