To apply the advantages of deep learning in recognizing two-dimensional(2D)images to three-phase inverter fault diagnosis,a threephase inverter fault diagnosis model based on gramian angular field(GAF)combined with co...To apply the advantages of deep learning in recognizing two-dimensional(2D)images to three-phase inverter fault diagnosis,a threephase inverter fault diagnosis model based on gramian angular field(GAF)combined with convolutional neural network(CNN)was proposed.Since the current signals of the inverter in different working states are different,the images formed by the time series encoding are also different,which enables the image recognition technology to be used for time series classification to identify the fault current signal of the inverter.Firstly,the one-dimensional(1D)inverter fault current signal was converted into a 2D image through the GAF.Next,the CNN model suitable for inverter fault diagnosis was input to realize the detection,classification and location of inverter fault.The simulation results show that the recognition accuracy of this method is 99.36%under different noisy data.Compared with other traditional methods,it has higher accuracy and reliability,and stronger anti-noise interference capability and robustness in dealing with noisy data.Therefore,it is an effective fault diagnosis method for inverters.展开更多
目的:明确黄芪、三七及其配伍对萎缩性胃炎大鼠胃黏膜热休克蛋白70(heat shock protein 70,HSP70)及其转录因子GAF表达的影响.方法:清洁级Wistar大鼠54只,随机分为空白组、模型组、替普瑞酮组、黄芪组、三七组、黄芪+三七组.运用幽门弹...目的:明确黄芪、三七及其配伍对萎缩性胃炎大鼠胃黏膜热休克蛋白70(heat shock protein 70,HSP70)及其转录因子GAF表达的影响.方法:清洁级Wistar大鼠54只,随机分为空白组、模型组、替普瑞酮组、黄芪组、三七组、黄芪+三七组.运用幽门弹簧配合高盐热淀粉糊灌胃法制备萎缩性胃炎模型后,分别给予空白组、模型组(生理盐水2mL/d)、黄芪组[黄芪水煎剂3.5g/(kg·d)]、三七组[三七粉冲剂0.7g/(kg·d)]、黄芪+三七组{黄芪三七溶液灌胃[其中黄芪3.5g/(kg·d)、三七0.7g/(kg·d)]}、替普瑞酮组[200mg/(kg·d)]灌胃.连续给药1mo后,取大鼠胃组织,经量子点免疫荧光组织化学方法测定各组大鼠胃黏膜中HSP70蛋白及其转录因子GAF表达量.结果:同模型组相比,黄芪组、三七组、黄芪+三七组以及替普瑞酮组胃黏膜中HSP70的表达有显著性差异(P=0.0000,0.0269,0.0020,0.006);同时上述各组HSP70转录因子GAF的表达,亦显著性高于模型组(P=0.0000,0.0000,0.00100.0052);黄芪组HSP70表达高于三七组(P=0.0134),但HSP70转录因子GAF的表达在两组间无统计学差异.结论:黄芪、三七及其配伍可以明显改善萎缩性胃炎大鼠胃黏膜状态;通过诱导并增加转录因子GAF的表达,促进热休克蛋白70的表达,可能是黄芪、三七治疗萎缩性胃炎的作用途径之一.展开更多
文摘To apply the advantages of deep learning in recognizing two-dimensional(2D)images to three-phase inverter fault diagnosis,a threephase inverter fault diagnosis model based on gramian angular field(GAF)combined with convolutional neural network(CNN)was proposed.Since the current signals of the inverter in different working states are different,the images formed by the time series encoding are also different,which enables the image recognition technology to be used for time series classification to identify the fault current signal of the inverter.Firstly,the one-dimensional(1D)inverter fault current signal was converted into a 2D image through the GAF.Next,the CNN model suitable for inverter fault diagnosis was input to realize the detection,classification and location of inverter fault.The simulation results show that the recognition accuracy of this method is 99.36%under different noisy data.Compared with other traditional methods,it has higher accuracy and reliability,and stronger anti-noise interference capability and robustness in dealing with noisy data.Therefore,it is an effective fault diagnosis method for inverters.
文摘目的:明确黄芪、三七及其配伍对萎缩性胃炎大鼠胃黏膜热休克蛋白70(heat shock protein 70,HSP70)及其转录因子GAF表达的影响.方法:清洁级Wistar大鼠54只,随机分为空白组、模型组、替普瑞酮组、黄芪组、三七组、黄芪+三七组.运用幽门弹簧配合高盐热淀粉糊灌胃法制备萎缩性胃炎模型后,分别给予空白组、模型组(生理盐水2mL/d)、黄芪组[黄芪水煎剂3.5g/(kg·d)]、三七组[三七粉冲剂0.7g/(kg·d)]、黄芪+三七组{黄芪三七溶液灌胃[其中黄芪3.5g/(kg·d)、三七0.7g/(kg·d)]}、替普瑞酮组[200mg/(kg·d)]灌胃.连续给药1mo后,取大鼠胃组织,经量子点免疫荧光组织化学方法测定各组大鼠胃黏膜中HSP70蛋白及其转录因子GAF表达量.结果:同模型组相比,黄芪组、三七组、黄芪+三七组以及替普瑞酮组胃黏膜中HSP70的表达有显著性差异(P=0.0000,0.0269,0.0020,0.006);同时上述各组HSP70转录因子GAF的表达,亦显著性高于模型组(P=0.0000,0.0000,0.00100.0052);黄芪组HSP70表达高于三七组(P=0.0134),但HSP70转录因子GAF的表达在两组间无统计学差异.结论:黄芪、三七及其配伍可以明显改善萎缩性胃炎大鼠胃黏膜状态;通过诱导并增加转录因子GAF的表达,促进热休克蛋白70的表达,可能是黄芪、三七治疗萎缩性胃炎的作用途径之一.
