Abstract: A compensation method and compensation apparatus for a display panel, a display device and a storage medium. The method includes: with a first display grayscale of a first display region as a reference display grayscale, acquiring a second display grayscale of a second display region after a user adjusts the second display region; determining, according to the first display grayscale and the second display grayscale, a difference coefficient between the second display region and the first display region under a current use duration of the display panel; determining, according to the difference coefficient and a pre-stored display compensation curve of the second display region, a compensation start duration of the second display region, where the display compensation curve is a change curve of a relationship between a use duration of the second display region and a difference coefficient between the second display region and the first display region.

Abstract: A pulp molded product line with roll forming function includes a pulp suction device, a hot pressing assembly used to perform hot pressing on a pulp sucked by the pulp suction device to obtain a hot pressed pulp molded product, an edge cutting device used to perform edge cutting on the hot pressed pulp molded product to obtain an unrolled pulp molded product; and a rolling device used to perform radially inwards rolling on the unrolled pulp molded product to obtain a pulp molded product. The advantages of the pulp molded product line with roll forming function are that the waste problem of inconsistent material thickness by rolling can be solved, the raw materials can be saved and the production and processing efficiency can be improved.

Abstract: The present invention relates to the field of working lamp technologies, which provides a neck-hung working lamp is provided, comprising a head band for being hung around a neck and lamp bodies connected at both ends of the head band. A mounting groove is disposed at both ends of the head band respectively, a cover plate is disposed at an outer side of the mounting groove, a telescopic gap is formed between the mounting groove and the cover plate, a telescoping mechanism is disposed at the telescopic gap, one end of the telescoping mechanism is connected with the lamp body, and the telescoping mechanism is used to adjust a distance between the head band and the lamp body. One of the advantages is to bring inconvenience to use in a neck-hung lamp in the prior art, the present invention provides a neck-hung working lamp.

Abstract: A BOTDA system that combined optical pulse coding techniques and coherent detection includes a narrow linewidth laser, two polarization-maintaining couplers, microwave generator, two electro-optic modulators (EOMs), fiber under test, an optical circulator, a 3 dB coupler, a polarization scrambler, a pulse generator, a balance photodetector, an electrical spectrum analyzer, digital signal processing unit and a frequency shifter. The optical pulse coding techniques and coherent detection are simultaneously used in the invented system, which can be enhance the signal-to-noise ration (SNR), the measuring accuracy and the sensing distance of BOTDA. Moreover, the proposed system has the capacity of break interrogation.

Abstract: A BOTDA system that combined optical pulse coding techniques and coherent detection includes a narrow linewidth laser, two polarization-maintaining couplers, microwave generator, two electro-optic modulators (EOMs), fiber under test, an optical circulator, a 3 dB coupler, a polarization scrambler, a pulse generator, a balance photodetector, an electrical spectrum analyzer, digital signal processing unit and a frequency shifter. The optical pulse coding techniques and coherent detection are simultaneously used in the invented system, which can be enhance the signal-to-noise ration (SNR), the measuring accuracy and the sensing distance of BOTDA. Moreover, the proposed system has the capacity of break interrogation.