摘要:
A system and method for determining an initial duty cycle for startup of a voltage regulator involves generating a first current source responsive to an input voltage to the voltage regulator and generating a second current source responsive to an output voltage of the voltage regulator. A first capacitor is charged using the first current source responsive to a duty cycle of a PWM signal of the voltage regulator to a first voltage. A second capacitor is charged to a second voltage responsive to a period of the PWM signal of the voltage regulator. The initial duty cycle for startup of the voltage regulator is established as the duty cycle of the PWM signal when the first voltage is substantially equal to the second voltage.
摘要:
The present invention provides novel fatty acid desaturases genes used for synthesis of polyunsaturated fatty acids, especially delta-9 desaturases (FADS9-I). The present invention also provides nucleic acid sequence coding the above-described desaturases, expression vector of the above-described desaturases and recombinant microorganism expressing above-described desaturases.
摘要:
A method of image processing. An expected band-averaged spectral radiances image vector is simulated from training hyperspectral data and at least one filter transmittance function corresponding to the at least one optical filter. A simulated measured band-averaged spectral radiances image vector is simulated from the training hyperspectral data and the at least one transmittance function. A realistic measured band-averaged spectral radiances image vector is provided from at least one optical filter. A cross-correlation matrix of the expected band-averaged spectral radiances image vector and the realistic measured band-averaged spectral radiances image vector is calculated. An auto-correlation matrix of the simulated measured band-averaged spectral radiances image vector is calculated. An optimal out-of-band transform matrix is generated by matrix-multiplying the cross-correlation matrix and an inverse of the auto-correlation matrix. A realistic recovered band-averaged spectral radiances image vector is generated by matrix-multiplying the optimal out-of-band transform matrix and the realistic measured band-averaged spectral radiances image vector, the realistic recovered band-averaged spectral radiances image vector being free of out-of-band effects.
摘要:
A method of multispectral decomposition for the removal of out-of-band effects. A band of a multispectral radiance is measured using at least one optical filter, upon scanning a plurality of original radiances. A spectral range of an integral is partitioned between a maximum cut-off wavelength of the band and a minimum cut-off wavelength of the band into a plurality of sub-ranges. A multispectral radiance vector is generated from the measured band-averaged spectral radiances. The pre-calculated multispectral decomposition transform matrix corresponding to the optical filter and the measured multispectral radiance vector are matrix-multiplied to generate a band-averaged spectral radiances image vector representing a plurality of recovered band-averaged spectral radiances. The plurality of recovered band-averaged spectral radiances is outputted, for example to a display, thereby generating a plurality of recovered radiances free of out-of-band effects and which approximate the plurality of original radiances.
摘要:
A method of image processing. A band-averaged spectral radiance is measured using at least one optical filter upon scanning a plurality of original radiances. The measured band-averaged spectral radiance includes a measured in-band-averaged spectral radiance and a measured band-gap-averaged spectral radiance. A multispectral radiance vector is generated from the measured band-averaged spectral radiance. The multispectral radiance vector and an out-of-band correction transform matrix corresponding to the at least one optical filter are matrix-multiplied to generate a band-averaged spectral radiances image vector representing a plurality of recovered band-averaged spectral radiances. The plurality of recovered band-averaged spectral radiances is analyzed for a presence of a target.
摘要:
An ultrasonic test apparatus includes a container containing de-ionized water, a pressing member, a supporting member, and a fixing member. The limiting member, the loading member, and the cover member are disposed in the de-ionized water. The fixing member tightly fixes the pressing member and the supporting member together for mounting at least part of integrated circuits to be detected between the pressing member and the supporting member.
摘要:
A camera module includes an image sensor, a lens assembly mounted on the image sensor, and a shell defining a receiving space. The image sensor and the lens assembly are accommodated in the receiving space. The lens assembly is fixedly engaged in the shell.
摘要:
A tunable transition piece aft-frame is disclosed for tuning the exit profile of combustion products as such products flow from a transition piece to a combustion product receiving apparatus. The aft-frame includes a generally rectilinear shaped body which has a laterally extending flange. Dilution holes are formed in the flange and are configured to allow dilution air to penetrate into the flow of the combustion products to shape the exit temperature profile of the combustion products.
摘要:
The present utility model relates to furniture, more particularly, to a folding chair, comprising a cushion support, a rear cushion support, a backrest support, an arm support, a cushion plate and a backrest, wherein the cushion support intersects the rear cushion support and is combined with the cushion support using a pivot; one end of the backrest support is pivotally connected with that of the cushion support, while one end of the arm support is pivotally combined with that of the rear cushion support; both ends of the backrest support and the arm support are connected pivotally, and the two ends of the cushion plate are fixed respectively on the cushion support and rear cushion support, which are pivotally combined with each other, forming a certain angle when unfolded and coming together when clamped. The present utility model is simple and easy for use, and is a multi-purpose folding chair suitable for outdoor sports and leisure activities.
摘要:
A camera module includes a printed circuit board and a lens mounted on the printed circuit board. The printed circuit board includes a main body having a regular rectangular shape, for example, and a marked portion formed on the main body. The main body has a first symmetrical axis lengthwise along the rectangular structure of the main body, and a second symmetrical axis perpendicular to the first symmetric axis. The marked portion is visible from the top or the bottom of the printed circuit board, which aids in the assembly of the printed circuit board.