Grirem Advanced Materials Co., Ltd.

General Research Institute for Nonferrous Metals

General Research Institute for Nonferrous Metals, Beijing

Shusheng Zhang

Hongwei Li

Xiaowei Huang

Weidong Zhuang

Yunsheng Hu

Zhen Long

Xiaoling Li

Wanzhang Wang

Huagiang He

This application relates to the field of electrical technologies, and provides a full even harmonic digital demodulation method based on full-phase analysis for a magnetic modulator. According to the full even harmonic digital demodulation method based on full-phase analysis for a magnetic modulator, standard voltage timing data output by the magnetic modulator is obtained when a DC calibration current with a set amplitude is fed into the magnetic modulator during calibration of the magnetic modulator; an output voltage sequence from full-phase Fourier analysis is established based on the standard voltage sequence data, and the output voltage sequence is preprocessed; comprehensive analysis is performed on the preprocessed output voltage sequence from full-phase Fourier analysis to obtain all standard even harmonic signals and current conversion coefficients.

Digital full even harmonic demodulation method based on full-phase analysis for magnetic modulator

Provided is an online fault diagnosis method for a solenoid valve based on analysis of time-frequency domain characteristics, which relates to the technical field of solenoid valve fault diagnosis. The online fault diagnosis method for a solenoid valve based on analysis of time-frequency domain characteristics includes: acquiring timing current data of a solenoid valve drive end, and performing time domain analysis and frequency domain analysis to obtain time domain and frequency domain feature vectors, respectively, and combining the time domain and frequency domain feature vectors to obtain a complex time-frequency domain feature vector; acquiring a plurality of sets of labeled complex feature vectors by changing an operating state of a solenoid valve and then generating an isolated forest model for evaluation by majority voting; and finally, realizing online diagnosis on a fault mode of the solenoid valve.

Online fault diagnosis method for solenoid valve based on analysis of time-frequency domain characteristics

A phosphor can be excited by UV, purple or blue light LED, its preparation method, and light emitting devices incorporating the same. The phosphor contains rare earth, silicon, alkaline-earth metal, halogen, and oxygen, as well as aluminum or gallium. Its General formula of is aLnO.MO.bM'O.fSiO.cAX:dR, wherein Ln is at least one metal element selected from a group consisting of Sc, Y, La, Pr, Nd, Gd, Ho, Yb and Sm; M is at least one metal element selected from a group consisting of Ca, Sr and Ba; M&#x2032; is at least one metal element selected from Al and Ga; A is at least one metal element selected from a group consisting of Li, Na, K, Mg, Ca, Sr and Ba; X is at least one element selected from F and Cl; R is at least one metal element selected from a group consisting of Ce, Eu, Tb and Mn; 0.01&#x2266;a&#x2266;2, 0.35&#x2266;b&#x2266;4, 0.01&#x2266;c&#x2266;1, 0.01&#x2266;d&#x2266;0.3, 0.01&#x2266;f&#x2266;3, 0.6&#x2266;e&#x2266;2.4. The phosphor has broad emitting range, high efficiency, better uniformity and stability. A light emitting device is obtained by incorporating the phosphor into a UV, purple or blue light emitting device.

Phosphor, its preparation method and light emitting devices using the same

A phosphor can be excited by UV, purple or blue light LED, its production and the light emitting devices. The general formula of the phosphor is LnM(O,F):(R,M'), wherein, Ln is at least one metal element selected from a group consisting of Sc, Y, La, Pr, Nd, Gd, Ho, Yb and Sm, 2.6&#x2266;a&#x2266;3.4; M is at least one element selected from a group consisting of B, Al and Ga, 4.5&#x2266;b&#x2266;5.5; R is at least one metal element selected from a group consisting of Ce and Tb; M&#x2032; is at least one metal element selected from a group consisting of Ca, Sr, Ba, Mn and Zn, 0.001&#x2266;x&#x2266;0.4. The phosphor possesses broad emitting range, high efficiency, better uniformity and stability. A light emitting device can be obtained by incorporating this phosphor into a UV, purple or blue light emitting device.

Aluminate phosphor containing bivalence metal elements, its preparation and the light emitting devices incorporating the same

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Beijing, China

Shusheng Zhang