In the High Atlas soil erosion constitutes a serious problem which leads to destruction of agricultural land and to the supply of important solid load to streams.This process contributes to harmful floods and to signi...In the High Atlas soil erosion constitutes a serious problem which leads to destruction of agricultural land and to the supply of important solid load to streams.This process contributes to harmful floods and to significant silting of dams.The management of the basins slopes is a priority in order to reduce damage related to erosion.In the studied area,a significant part of the geological formations are展开更多
An operator T is said to be paranormal if ｜｜T^2 x ｜｜ 〉｜｜Tx｜｜^2 holds for every unit vector x. Several extensions of paranormal operators are considered until now, for example absolute-k-paranormal and p-paran...An operator T is said to be paranormal if ｜｜T^2 x ｜｜ 〉｜｜Tx｜｜^2 holds for every unit vector x. Several extensions of paranormal operators are considered until now, for example absolute-k-paranormal and p-paranormal introduced in [10], [14], respectively. Yamazaki and Yanagida [38] introduced the class of absolute-（p, r）-paranormal operators as a further generalization of the classes of both absolute-k-paranormal and p-paranormal operators. An operator T ∈ B（H） is called absolute-（p, r）-paranormal operator if ｜｜｜T｜p｜T^＊ ｜^rx｜｜^r 〉 ｜｜｜T^＊｜^rx｜｜p＋r for every unit vector x ∈ H and for positive real numbers p 〉 0 and r 〉 0. The famous result of Browder, that self adjoint operators satisfy Browder＇s theorem, is extended to several classes of operators. In this paper we show that for any absolute-（p, r）- paranormal operator T, T satisfies Browder＇s theorem and a-Browder＇s theorem. It is also shown that if E is the Riesz idempotent for a nonzero isolated point μ of the spectrum of a absolute-（p, r）-paranormal operator T, then E is self-adjoint if and only if the null space of T -μ, N（T - μ） N（T^＊ - ^μ）.展开更多
目的:利用R语言数据挖掘技术分析脓毒症的中医证型及用药规律,为脓毒症临床中医诊疗方案提供参考。方法:通过检索PubMed、Web of Science、中国知网、万方、维普和中国生物医学文献数据库,收集从建库至2023年12月31日收录的符合纳入标...目的:利用R语言数据挖掘技术分析脓毒症的中医证型及用药规律,为脓毒症临床中医诊疗方案提供参考。方法:通过检索PubMed、Web of Science、中国知网、万方、维普和中国生物医学文献数据库,收集从建库至2023年12月31日收录的符合纳入标准的中医药治疗脓毒症临床研究文献,建立相关处方数据库。运用Excel整理并分析方药信息,包括中医辨证分型、治法治则,中药的使用频次、性味、归经、功效等;并利用R语言进行关联规则分析及聚类分析。结果:共检索出文献10345篇,纳入分析280篇,涉及中药215味,其中排名前10的中药分别是大黄、甘草、赤芍、厚朴、黄芪、芒硝、黄芩、丹参、地黄、枳实;四气以寒、温为主,五味以苦、甘、辛为主,归经以脾、胃、肺为主,功效以清热、补虚、泻下为主,证型以热毒内盛证、瘀毒内阻证为主。关联规则分析得到核心组方为大黄、芒硝、枳实、厚朴、当归、川芎、赤芍、桃仁、地黄、红花。高频药物聚类分析得到4个聚类群,适用于不同证型。结论:治疗脓毒症的用药规律以清热、泻下、化瘀、补虚为主,核心证型-处方有4类,临床上应根据患者的证候特点进行辨证论治,在核心证型-处方的基础上随证加减。展开更多
光伏故障检测对光伏电站智能运维具有重要意义。针对光伏组件红外图像中热斑目标小、难检测的问题,研究了基于改进Faster R CNN的光伏组件红外热斑故障检测模型。将Swin Transformer作为Faster R CNN模型中的特征提取模块,捕获图像的全...光伏故障检测对光伏电站智能运维具有重要意义。针对光伏组件红外图像中热斑目标小、难检测的问题,研究了基于改进Faster R CNN的光伏组件红外热斑故障检测模型。将Swin Transformer作为Faster R CNN模型中的特征提取模块,捕获图像的全局信息,建立特征之间的依赖关系,提高模型的建模能力;进一步利用BiFPN进行特征融合,改善了热斑故障由于目标小和特征不明显容易被模型忽略掉的问题;同时为了抑制光伏红外图像中背景和噪声的干扰,加入轻量级注意力模块CBAM,使模型更加关注重要通道和关键区域,提高对热斑故障检测精度。在自建光伏组件图像数据集上进行实验,热斑故障检测精度高达915,验证了本文模型对光伏组件热斑故障检测的有效性。展开更多
文摘In the High Atlas soil erosion constitutes a serious problem which leads to destruction of agricultural land and to the supply of important solid load to streams.This process contributes to harmful floods and to significant silting of dams.The management of the basins slopes is a priority in order to reduce damage related to erosion.In the studied area,a significant part of the geological formations are
基金supported by Taibah University Research Center Project(1433/803)
文摘An operator T is said to be paranormal if ｜｜T^2 x ｜｜ 〉｜｜Tx｜｜^2 holds for every unit vector x. Several extensions of paranormal operators are considered until now, for example absolute-k-paranormal and p-paranormal introduced in [10], [14], respectively. Yamazaki and Yanagida [38] introduced the class of absolute-（p, r）-paranormal operators as a further generalization of the classes of both absolute-k-paranormal and p-paranormal operators. An operator T ∈ B（H） is called absolute-（p, r）-paranormal operator if ｜｜｜T｜p｜T^＊ ｜^rx｜｜^r 〉 ｜｜｜T^＊｜^rx｜｜p＋r for every unit vector x ∈ H and for positive real numbers p 〉 0 and r 〉 0. The famous result of Browder, that self adjoint operators satisfy Browder＇s theorem, is extended to several classes of operators. In this paper we show that for any absolute-（p, r）- paranormal operator T, T satisfies Browder＇s theorem and a-Browder＇s theorem. It is also shown that if E is the Riesz idempotent for a nonzero isolated point μ of the spectrum of a absolute-（p, r）-paranormal operator T, then E is self-adjoint if and only if the null space of T -μ, N（T - μ） N（T^＊ - ^μ）.
文摘目的:利用R语言数据挖掘技术分析脓毒症的中医证型及用药规律,为脓毒症临床中医诊疗方案提供参考。方法:通过检索PubMed、Web of Science、中国知网、万方、维普和中国生物医学文献数据库,收集从建库至2023年12月31日收录的符合纳入标准的中医药治疗脓毒症临床研究文献,建立相关处方数据库。运用Excel整理并分析方药信息,包括中医辨证分型、治法治则,中药的使用频次、性味、归经、功效等;并利用R语言进行关联规则分析及聚类分析。结果:共检索出文献10345篇,纳入分析280篇,涉及中药215味,其中排名前10的中药分别是大黄、甘草、赤芍、厚朴、黄芪、芒硝、黄芩、丹参、地黄、枳实;四气以寒、温为主,五味以苦、甘、辛为主,归经以脾、胃、肺为主,功效以清热、补虚、泻下为主,证型以热毒内盛证、瘀毒内阻证为主。关联规则分析得到核心组方为大黄、芒硝、枳实、厚朴、当归、川芎、赤芍、桃仁、地黄、红花。高频药物聚类分析得到4个聚类群,适用于不同证型。结论:治疗脓毒症的用药规律以清热、泻下、化瘀、补虚为主,核心证型-处方有4类,临床上应根据患者的证候特点进行辨证论治,在核心证型-处方的基础上随证加减。
文摘光伏故障检测对光伏电站智能运维具有重要意义。针对光伏组件红外图像中热斑目标小、难检测的问题,研究了基于改进Faster R CNN的光伏组件红外热斑故障检测模型。将Swin Transformer作为Faster R CNN模型中的特征提取模块,捕获图像的全局信息,建立特征之间的依赖关系,提高模型的建模能力;进一步利用BiFPN进行特征融合,改善了热斑故障由于目标小和特征不明显容易被模型忽略掉的问题;同时为了抑制光伏红外图像中背景和噪声的干扰,加入轻量级注意力模块CBAM,使模型更加关注重要通道和关键区域,提高对热斑故障检测精度。在自建光伏组件图像数据集上进行实验,热斑故障检测精度高达915,验证了本文模型对光伏组件热斑故障检测的有效性。
文摘热轧带钢是钢铁行业的重要产品,其表面缺陷是影响产品质量的重要因素。针对传统缺陷检测算法存在的过程繁琐、精度不足和效率低下等问题,提出一种基于改进更快速区域卷积神经网络(faster region-based convolutional neural network,Faster R-CNN)的检测算法,实现对热轧带钢表面缺陷的高效、高精度检测。首先,采用特征相加的方法对底层细节特征和高层语义特征进行融合;然后,采用精准的感兴趣区域池化(precise region of interest pooling,Precise ROI Pooling)获取固定大小的特征向量,避免特征出现位置偏差;最后,利用均值偏移聚类算法对带钢数据集进行聚类,获得适用于热轧带钢表面缺陷检测的先验框尺寸。实验结果表明,所提算法在热轧带钢表面缺陷检测数据集上的平均精度均值达到了85.34%,检测速度为23.5帧/s,且鲁棒性良好,满足实际的工业检测需求。
