Abstract: A deep learning fault diagnosis method includes the following steps: a fault diagnosis data set X is processed based on sliding window processing, to obtain a picture-like sample data set {tilde over (X)}, and obtain an attention matrix A of the picture-like sample data set {tilde over (X)}; and a 2D-CNN model is constructed to process the picture-like sample data set {tilde over (X)} to obtain a corresponding feature map F, and in the meantime, the feature map F is processed based on channel-oriented average pooling and channel-oriented maximum pooling to obtain an output P1 of the average pooling and an output P2 of the maximum pooling, and a weight matrix W is obtained based on the attention matrix A, the output P1 of the average pooling, and the output P2 of the maximum pooling, so that an output of the model is a feature map {tilde over (F)} based on an attention mechanism, where {tilde over (F)}=WF.

Abstract: A flood risk prediction method includes: collecting basic meteorological hydrological data of a basin by using a data collection and storage box; calibrating a basin hydrological model and a machine learning model; obtaining a meteorological simulation series under M groups of climate change scenarios and driving the basin hydrological model and the machine learning model to simulate a basin hydrological process under a future scenario; establishing a water and heat coupling balance equation of the basin to obtain annual average underlying surface feature parameters of the basin; extracting feature values of a flood duration and a flood volume and with the feature parameters as co-variates, establishing a joint probability distribution function; obtaining a joint return period of the flood duration and the flood volume; based on a dataset of the shared socioeconomic pathway, deriving a social economic exposure degree of future flood risk increase.

Abstract: A nitric oxide-releasing 3D printing ink is described for its composition and uses in fabricating a plurality of types of nitric oxide-releasing medical devices. The printing ink composition comprises a mixture of at least one nitric oxide donor and at least one polymer. The nitric oxide-releasing medical device is manufactured by 3D printing technology and provides antimicrobial and/or antithrombus effects by releasing nitric oxide in the presence of moisture.

Abstract: A nitric oxide-releasing 3D printing ink is described for its composition and uses in fabricating a plurality of types of nitric oxide-releasing medical devices. The printing ink composition comprises a mixture of at least one nitric oxide donor and at least one polymer. The nitric oxide-releasing medical device is manufactured by 3D printing technology and provides antimicrobial and/or antithrombus effects by releasing nitric oxide in the presence of moisture.

Abstract: The present invention relates to a differential protection method for bridge circuit in current converter control system, including the steps of: 1). obtaining sample values of the three-phase current for the current converter control system at AC side thereof, and calculating the absolute value of each sampling value respectively; 2). calculating a value of current at the AC side of the current converter control system; and 3). determining whether to perform a relay protection for the current converter control system according to the value current at the AC side of the current converter control system. The method of the present invention provided, is fast, convenient, and with a small amount of calculation. The current converter control system determines whether to perform a relay protection in a short time. Also it reduces the possibility that the equipment burned because of cannot break the circuit in time.

Abstract: The present invention relates to a differential protection method for bridge circuit in current converter control system, including the steps of: 1). obtaining sample values of the three-phase current for the current converter control system at AC side thereof, and calculating the absolute value of each sampling value respectively; 2). calculating a value of current at the AC side of the current converter control system; and 3). determining whether to perform a relay protection for the current converter control system according to the value current at the AC side of the current converter control system. The method of the present invention provided is fast, convenient, and with a small amount of calculation. The current converter control system determines whether to perform a relay protection in a short time. Also it reduces the possibility that the equipment burned because of cannot break the circuit in time.

Abstract: The invention relates to rapid online diagnosis method of high-power rectifier open-circuit fault, including: 1) collecting actual output direct current value id(t0) and three phase input electric current instantaneous values ia(t0), ib(t0) and ic(t0) of rectifier at t0 moment, and calculating theoretical output direct current value id? of the rectifier according to ia(t0), ib(t0) and ic(t0); 2) comparing id? (t0) and id(t0), when id? (t0) is not more than k1×id(t0), comparing absolute value of maximal three phase input electric current instantaneous value and pre-set threshold value A1, if the maximal three phase input electric current instantaneous value is not less than A1, the rectifier appears open-circuit fault.