Abstract: A distributed feedback (DFB) semiconductor laser device includes an active layer, a first grating layer and a second grating. The first grating layer has a first grating structure with a first grating period. The second grating layer has a second grating structure with a second grating period substantially different from the first grating period. The active layer, the first grating layer and the second grating layer are vertically stacked, and the equivalent grating period of the DFB semiconductor laser device is (2×P1×P2)/(P1+P2), where P1 and P2 respectively represent the first grating period and the second grating period.

Abstract: A biological signal analyzing device configured to generate a first detection image or a second detection image is provided. The biological signal analyzing device includes a light-incident surface, a light-emitting surface and a plurality of optical-resonance structures. The sample is placed near the light incident surface, and receives a first light through the sample. The light resonance structures are configured to process the first light and generate a second and third light. The second light emits from the light emitting surface, and adapted to form the first detection image corresponding to the sample, and the third light emits from the light incident surface, and adapted to form the second detection image corresponding to the sample. The optical resonance structures vary their thickness along the first direction or vary the width along the second direction. A biological sensing apparatus, a sensing method and a fabrication method are also provided.

Abstract: An optical displacement sensing system is provided. With configuration of an optical sensor disposed on a displacement platform and in cooperation with a broadband light source and an optical spectrum analyzer, when the displacement platform moves, the waveguide grating of the optical sensor is resonated and the reflected light provided with a resonance wavelength is formed. The waveguide grating has the plurality of grating periods, and when the displacement platform moves to a different position to make the broadband light source correspond to a different grating period, the position can correspond to the different resonance wavelength. Therefore, according to the aforementioned configuration, the position is determined according to the different resonance wavelength, instead of using an optical encoder; furthermore, the micrometer-scale or nanometer-scale displacement detection is achieved.

Abstract: An image display system includes a projector, an image display element, and at least one actuator. The projector is configured to project laser light. The image display element is configured to display an image using the projected laser light. The at least one actuator is configured to vibrate the image display element.

Abstract: An audio modification includes a signal transmitter, at least one signal receiver, a processor and an audio generator. The signal transmitter being disposed on a first device is configured to transmit a signal. The at least one signal receiver being disposed on a second device is configured to receive the signal. The processor is configured to determine a first distance between the first device and the second device according to a measuring indicator of the signal and to calculate a second distance that forms a head dimension of a user. The processor is further configured to apply the head dimension in a head related transfer function in order to modify audio information. The audio generator is configured to output a sound corresponding to the audio information.

Abstract: A sound reproducing method used in sound reproducing apparatus that includes the steps outlined below is provided. A sound signal is generated with a 3D sound generating process according to listener data and sound data. Pre-recorded sound data is retrieved to further generate a target distance function corresponding to the sound distance. A fixed head-related transfer function corresponding to a fixed distance is retrieved. A target head-related transfer function corresponding to the sound distance is generated by adapting the target distance function to the fixed head-related transfer function. The sound signal is reproduced by multiplying the sound signal by the target head-related transfer function.

Abstract: A method of numerical-control scraping of a work piece has a preparing step, a scanning step, a flatness-parameter inputting step, a surface-finishing step, a related-parameter inputting step, an auto-scraping step and an analyzing step. The preparing step comprises preparing a multi-axis machine tool, a laser displacement meter, an auto scraping apparatus and a computer. The scanning step comprises scanning the work piece. The flatness-parameter inputting step comprises inputting a flatness-parameter. The surface-finishing step comprises calculating out the to-be-scraped ranges of the work piece and scraping the work piece. The related-parameter inputting step comprises inputting desired PPI and POP in the computer, calculating out the HOP, the DOS and the oil content to obtain the length, the width and the depth of a single scraping process. The auto-scraping step comprises scraping the work piece to meet the requirement. The analyzing step comprises detecting the 3D-appearance drawing of the work piece.

Abstract: A method of numerical-control scraping of a work piece has a preparing step, a scanning step, a flatness-parameter inputting step, a surface-finishing step, a related-parameter inputting step, an auto-scraping step and an analyzing step. The preparing step comprises preparing a multi-axis machine tool, a laser displacement meter, an auto scraping apparatus and a computer. The scanning step comprises scanning the work piece. The flatness-parameter inputting step comprises inputting a flatness-parameter. The surface-finishing step comprises calculating out the to-be-scraped ranges of the work piece and scraping the work piece. The related-parameter inputting step comprises inputting desired PPI and POP in the computer, calculating out the HOP, the DOS and the oil content to obtain the length, the width and the depth of a single scraping process. The auto-scraping step comprises scraping the work piece to meet the requirement. The analyzing step comprises detecting the 3D-appearance drawing of the work piece.

Abstract: A system and method for monitoring and controlling oil return to a compressor, characterized by monitoring and controlling oil level, oil temperature, and compressor outlet pressure, so as to determine whether the oil level is lower than a predetermined level threshold, whether the temperature in the lubricating oil box is lower than a predetermined temperature threshold, and whether the compressor outlet pressure exceeds a predetermined pressure threshold, so as to control the flow of lubricating oil returned to the oil box by controlling the valve opening of the oil return valve according to a non-segmentation principle or a segmentation principle, ensure sufficient lubricating oil in the oil box, and enhance efficiency of the system.

Abstract: A system and method for monitoring and controlling oil return to a compressor, characterized by monitoring and controlling oil level, oil temperature, and compressor outlet pressure, so as to determine whether the oil level is lower than a predetermined level threshold, whether the temperature in the lubricating oil box is lower than a predetermined temperature threshold, and whether the compressor outlet pressure exceeds a predetermined pressure threshold, so as to control the flow of lubricating oil returned to the oil box by controlling the valve opening of the oil return valve according to a non-segmentation principle or a segmentation principle, ensure sufficient lubricating oil in the oil box, and enhance efficiency of the system.

Abstract: In the present invention, a dual-output piezoelectric transformer for driving at least two loads is provided. The dual-output piezoelectric transformer comprises a piezoelectric piece, a set of input electrodes mounted centrally on a first and a second sides of the piece with a first polarization direction along a thickness direction of the piece, and a first and a second output electrodes polarized reversely in a second polarization direction and respectively mounted around surfaces of two ends of the piece with the second polarization direction being a longitudinal direction of the piece.

Abstract: An ultrasound transducer apparatus for shaping the ultrasound coverage field per application requirement in both the radiating and receiving mode of operation. Wave coverage field is shaped by forming at least one cut at designated location on the housing wall. A cut on the housing wall of the transducer pot-shaped structural body results into the reduction of wave intensity, either radiating or receiving, toward that direction where the cut is located.

Abstract: A system for inventory control is computerized. Through the computerization, radwaste drum is easily stored with time saved. The congestion is reduced and a whole storage status is easily acquired so that the maintenance is easily done.

Abstract: In the present invention, a dual-output piezoelectric transformer for driving at least two loads is provided. The dual-output piezoelectric transformer comprises a piezoelectric piece, a set of input electrodes mounted centrally on a first and a second sides of the piece with a first polarization direction along a thickness direction of the piece, and a first and a second output electrodes polarized reversely in a second polarization direction and respectively mounted around surfaces of two ends of the piece with the second polarization direction being a longitudinal direction of the piece.