Silicon photomultipliers （SiPMs） have remarkable advantages for use in photo-detection. Compared with PMT, SiPM shows advantages of high gain, excellent time resolution, insensitivity to magnetic fields and a lower ...Silicon photomultipliers （SiPMs） have remarkable advantages for use in photo-detection. Compared with PMT, SiPM shows advantages of high gain, excellent time resolution, insensitivity to magnetic fields and a lower operating voltage. SiPMs from Hamamatsu are used in the electromagnetic calorimeter （ECAL） sub-detector in the Positron Electron Balloon Spectrometer （PEBS） experiment, a balloon-borne spectrometer experiment aiming at the precise measurement of the cosmic-ray positron fraction. This paper introduces the evaluation and test results of several SiPM detector types, the dedicated front-end application specific integrated circuit （ASIC） electronics and the design of the data acquisition system （DAQ） system.展开更多
In agricultural farms in Indiawhere the staple diet formost of the households is potato,plant leaf diseases,namely Potato Early Blight(PEB)and Potato Late Blight(PLB),are quite common.The class label Plant Healthy(PH)...In agricultural farms in Indiawhere the staple diet formost of the households is potato,plant leaf diseases,namely Potato Early Blight(PEB)and Potato Late Blight(PLB),are quite common.The class label Plant Healthy(PH)is also used.If these diseases are not identified early,they can causemassive crop loss and thereby incur huge economic losses to the farmers in the agricultural domain and can impact the gross domestic product of the nation.This paper presents a hybrid approach for potato plant disease severity estimation and classification of diseased and healthy leaves,combining the strengths of classical image processing,computer vision,and deep learning.We propose a pipeline that initially employs OpenCV’s cv2 led color-based image segmentation to isolate and highlight diseased brown,yellowcolored lesions or regions and healthy green colored lesion areas associated with various potato leaf diseases.Adaptive Thresholding for illumination and texture feature extraction and U-Net Segmentation for mask refinement for severity estimation.It has a mathematical framework for quantifying the severity based on the spatial area distribution of these regions.This allows for both visual representation of the segmented regions in the form of overlay masks and quantification of distinct disease severity.We detail the implementation of the approach,including color space selection,segmentation strategies,mask creation,area calculation,and a potential mathematical model for severity calculation.Overlay masks generated are then used as input to a CBAM-EfficientNetB0 model,leveraging transfer learning for improved classification accuracy and efficiency.For the Plant Village dataset,the test accuracy achieved is 0.99,whereas the test loss is 0.02,respectively.For the Plant Doc dataset,the test accuracy achieved is 0.97,whereas the test loss is 0.06,respectively.Also,the CBAM attention mechanism model lays emphasis on relevant features within the lesions and overall image context.The results achieved with the Plant Village dataset are slightly better in comparison to the Plant Doc dataset.展开更多
德国亚琛工业大学(RWTH-Aachen)作为AMS-01和AMS-02的参与者计划在AMS实验无法继续的基础上,利用高空探测气球进行暗物质的探测。该项目就是为了研究暗物质而开展的试验,论文介绍Positron Electron Balloon Spectrometer(PEBS)的数据采...德国亚琛工业大学(RWTH-Aachen)作为AMS-01和AMS-02的参与者计划在AMS实验无法继续的基础上,利用高空探测气球进行暗物质的探测。该项目就是为了研究暗物质而开展的试验,论文介绍Positron Electron Balloon Spectrometer(PEBS)的数据采集部分,前端探测器部分可以查阅AMS的相关网页。展开更多
From the perspective of regulatory focus theory,the influencing mechanism of pro-environmental behaviors(PEBs)in the private domain on behaviors in the public domain were analyzed by revealing the mediating ef‐fect o...From the perspective of regulatory focus theory,the influencing mechanism of pro-environmental behaviors(PEBs)in the private domain on behaviors in the public domain were analyzed by revealing the mediating ef‐fect of the status quo maintenance and the moderating effect of the prevention focus orientation.The study re‐sults show that PEBs in the private domain significantly promote individuals’PEBs in the public domain.The status quo maintenance partially mediates the relationship between PEBs in the private and public domains.Specifically,individuals with a high-level prevention focus orientation strengthen the relationship between the PEBs in the private domain and the status quo maintenance,and that of the PEBs in the public domain.There‐fore,individuals with a high-level prevention focus will more likely engage in subsequent PEBs in the public domain after their initial PEBs in the private domain due to their increased status quo maintenance degree.Policymakers and practitioners should pay attention to the prevention-repetition effect and use the PEBs in the private domain to promote those in the public domain.展开更多
文摘Silicon photomultipliers （SiPMs） have remarkable advantages for use in photo-detection. Compared with PMT, SiPM shows advantages of high gain, excellent time resolution, insensitivity to magnetic fields and a lower operating voltage. SiPMs from Hamamatsu are used in the electromagnetic calorimeter （ECAL） sub-detector in the Positron Electron Balloon Spectrometer （PEBS） experiment, a balloon-borne spectrometer experiment aiming at the precise measurement of the cosmic-ray positron fraction. This paper introduces the evaluation and test results of several SiPM detector types, the dedicated front-end application specific integrated circuit （ASIC） electronics and the design of the data acquisition system （DAQ） system.
基金done under Department of Biotechnology(DBT)project titled“Application of Machine Learning for Hyperspectral Imaging and Remote Sensing aimed at Early Detection of Fungal Foliar Diseases and Bacterial Wilt Diseases in Potato Crop”,DBT/Reference.No.BT/PR45388/133/58/2022.
文摘In agricultural farms in Indiawhere the staple diet formost of the households is potato,plant leaf diseases,namely Potato Early Blight(PEB)and Potato Late Blight(PLB),are quite common.The class label Plant Healthy(PH)is also used.If these diseases are not identified early,they can causemassive crop loss and thereby incur huge economic losses to the farmers in the agricultural domain and can impact the gross domestic product of the nation.This paper presents a hybrid approach for potato plant disease severity estimation and classification of diseased and healthy leaves,combining the strengths of classical image processing,computer vision,and deep learning.We propose a pipeline that initially employs OpenCV’s cv2 led color-based image segmentation to isolate and highlight diseased brown,yellowcolored lesions or regions and healthy green colored lesion areas associated with various potato leaf diseases.Adaptive Thresholding for illumination and texture feature extraction and U-Net Segmentation for mask refinement for severity estimation.It has a mathematical framework for quantifying the severity based on the spatial area distribution of these regions.This allows for both visual representation of the segmented regions in the form of overlay masks and quantification of distinct disease severity.We detail the implementation of the approach,including color space selection,segmentation strategies,mask creation,area calculation,and a potential mathematical model for severity calculation.Overlay masks generated are then used as input to a CBAM-EfficientNetB0 model,leveraging transfer learning for improved classification accuracy and efficiency.For the Plant Village dataset,the test accuracy achieved is 0.99,whereas the test loss is 0.02,respectively.For the Plant Doc dataset,the test accuracy achieved is 0.97,whereas the test loss is 0.06,respectively.Also,the CBAM attention mechanism model lays emphasis on relevant features within the lesions and overall image context.The results achieved with the Plant Village dataset are slightly better in comparison to the Plant Doc dataset.
文摘德国亚琛工业大学(RWTH-Aachen)作为AMS-01和AMS-02的参与者计划在AMS实验无法继续的基础上,利用高空探测气球进行暗物质的探测。该项目就是为了研究暗物质而开展的试验,论文介绍Positron Electron Balloon Spectrometer(PEBS)的数据采集部分,前端探测器部分可以查阅AMS的相关网页。
基金support provided by the Zhejiang Province Planning Project of Philosophy and Social Science[Grant No.22NDJC107YB]Zhejiang Provincial Natural Science Foundation of China[Grant No.LY21G020009].
文摘From the perspective of regulatory focus theory,the influencing mechanism of pro-environmental behaviors(PEBs)in the private domain on behaviors in the public domain were analyzed by revealing the mediating ef‐fect of the status quo maintenance and the moderating effect of the prevention focus orientation.The study re‐sults show that PEBs in the private domain significantly promote individuals’PEBs in the public domain.The status quo maintenance partially mediates the relationship between PEBs in the private and public domains.Specifically,individuals with a high-level prevention focus orientation strengthen the relationship between the PEBs in the private domain and the status quo maintenance,and that of the PEBs in the public domain.There‐fore,individuals with a high-level prevention focus will more likely engage in subsequent PEBs in the public domain after their initial PEBs in the private domain due to their increased status quo maintenance degree.Policymakers and practitioners should pay attention to the prevention-repetition effect and use the PEBs in the private domain to promote those in the public domain.
文摘目的探讨空肠弯曲菌(Campylobacter jejuni,CJ)pcDNA3.1(-)-peb1A疫苗免疫昆明种小鼠后T细胞活化增殖状态。方法重组质粒CJ pcDNA3.1(-)-peb1A免疫昆明种小鼠后,取其脾淋巴细胞,应用ELISA法检测其膜表面分子CD3、CD4、CD8、CD25和CD28。结果检测结果显示:CD3检测,佐剂DNA组高于裸DNA组,在第10天有显著性差异(P<0.05);CD8检测,佐剂DNA组高于裸DNA组,在第10、20天均有显著性差异(P<0.05),裸DNA组也高于两对照组,但仅在第20天有显著性差异(P<0.05);CD25检测,裸DNA组高于NS组,但仅在第10天有显著性差异(P<0.05),佐剂DNA组高于裸DNA组,也仅在第20天有显著性差异(P<0.05);CD4及CD28检测,佐剂DNA组高于裸DNA组,在第10、20天均有显著性差异(P<0.05);在第10、20天各脾淋巴细胞膜表面分子检测,佐剂DNA组高于两对照组,有显著性差异(P<0.05)。结论 CJ pcDNA3.1(-)-peb1A疫苗能够有效地诱导T细胞活化增殖。
