Abstract: A biocompatible Mg—P coating on the surface of a zinc-based biomedical material, and a preparation method and use thereof are disclosed. In the method, zinc and a zinc alloy are first subjected to surface pretreatment and then soaked in a phosphate solution at a constant temperature to form the Mg—P coating through chemical liquid deposition (CLD). The control on the composition, thickness and surface morphology of the coating is realized by using the CLD method. The biocompatible Mg—P coating has a thickness of 0.5 ?m to 50 ?m, is dense and uniform, and comprises a main component of zinc-magnesium-phosphate and a small amount of zinc phosphate.

Abstract: A health-care preparation simultaneously with magnesium supplement and antioxidant functions and a preparation method thereof are disclosed. The health-care preparation comprises a main active ingredient of magnesium agent and an excipient. The magnesium agent is MgH2 micro-nano powder, and the excipient is a commonly used dietary supplement auxiliary material. Compared with the existing magnesium-supplementing preparation, the health-care preparation can simultaneously supplement magnesium which is the essential trace element in human body, and hydrogen which can neutralize oxygen free radicals. The present invention has the following advantages: it is convenient for storage and taking, and has a high conversion and absorption efficiency, a low cost, and no toxic side effects.

Abstract: A method for image correction and image projection apparatus using the same are provided, where the image projection apparatus scans a projection light beam on a projection plane to form an image. The image correction method includes the following steps. A plurality of projection points of the projection light beam on the projection plane are sampled to define a projection coordinate system. An image projection area is defined on the projection coordinate system. The projection light beam is moved to scan on the projection plane and projected to the projection points sequentially. Whether the projection point is located in the image projection area is determined. When the projection point is located in the image projection area, a corrected image information is provided to the projection point.

Abstract: A control method of a projection device is disclosed. The control method includes following steps: entering at least one projection mode; detecting at least one motion trace of the projection device; adjusting at least one swing angle of a scan unit of the projection device according to at least one motion trace to adjust a projection scope that the projection device projects on a projection surface.

Abstract: A method for image correction and image projection apparatus using the same are provided, where the image projection apparatus scans a projection light beam on a projection plane to form an image. The image correction method includes the following steps. A plurality of projection points of the projection light beam on the projection plane are sampled to define a projection coordinate system. An image projection area is defined on the projection coordinate system. The projection light beam is moved to scan on the projection plane and projected to the projection points sequentially. Whether the projection point is located in the image projection area is determined. When the projection point is located in the image projection area, a corrected image information is provided to the projection point.

Abstract: A channel estimator, configured for supplying equalization coefficients to a frequency equalizer, is configured for determining equalizer coefficients for a received wireless signal based on a minimum equalization error-based estimation. The channel estimator is configured for identifying first and second long preambles from the received wireless signal, determining an equalization coefficient for a selected frequency based on a minimized cost function for the first and second long preambles relative to a prescribed preamble value for the selected frequency, and supplying the equalization coefficient for the selected frequency to a frequency equalizer for equalization of the received wireless signal.

Abstract: An FFT circuit is implemented using a radix-4 butterfly element and a partitioned memory for storage of a prescribed number of data values. The radix-4 butterfly element is configured for performing an FFT operation in a prescribed number of stages, each stage including a prescribed number of in-place computation operations relative to the prescribed number of data values. The partitioned memory includes a first memory portion and a second memory portion, and the data values for the FFT circuit are divided equally for storage in the first and second memory portions in a manner that ensures that each in-place computation operation is based on retrieval of an equal number of data values retrieved from each of the first and second memory portions.

Abstract: A channel estimator, configured for supplying equalization coefficients to a frequency equalizer, is configured for determining equalizer coefficients for a received wireless signal based on a minimum equalization error-based estimation. The channel estimator is configured for identifying first and second long preambles from the received wireless signal, determining an equalization coefficient for a selected frequency based on a minimized cost function for the first and second long preambles relative to a prescribed preamble value for the selected frequency, and supplying the equalization coefficient for the selected frequency to a frequency equalizer for equalization of the received wireless signal.