Airborne hyperspectral imaging spectrometers have been used for Earth observation over the past four decades.Despite the high sensitivity of push-broom hyperspectral imagers,they experience limited swath and wavelengt...Airborne hyperspectral imaging spectrometers have been used for Earth observation over the past four decades.Despite the high sensitivity of push-broom hyperspectral imagers,they experience limited swath and wavelength coverage.In this study,we report the development of a push-broom airborne multimodular imaging spectrometer(AMMIS)that spans ultraviolet(UV),visible near-infrared(VNIR),shortwave infrared(SWIR),and thermal infrared(TIR)wavelengths.As an integral part of China's HighResolution Earth Observation Program,AMMIS is intended for civilian applications and for validating key technologies for future spaceborne hyperspectral payloads.It has been mounted on aircraft platforms such as Y-5,Y-12,and XZ-60.Since 2016,AMMIS has been used to perform more than 30 flight campaigns and gather more than 200 TB of hyperspectral data.This study describes the system design,calibration techniques,performance tests,flight campaigns,and applications of the AMMIS.The system integrates UV,VNIR,SWIR,and TIR modules,which can be operated in combination or individually based on the application requirements.Each module includes three spectrometers,utilizing field-of-view(FOV)stitching technology to achieve a 40°FOV,thereby enhancing operational efficiency.We designed advanced optical systems for all modules,particularly for the TIR module,and employed cryogenic optical technology to maintain optical system stability at 100 K.Both laboratory and in-flight calibrations were conducted to improve preprocessing accuracy and produce high-quality hyperspectral data.The AMMIS features more than 1400 spectral bands,with spectral sampling intervals of 0.1 nm for UV,2.4 nm for VNIR,3 nm for SWIR,and 32 nm for TIR.In addition,the instantaneous fields of view(IFoVs)for the four modules were 0.5,0.25,0.5,and 1 mrad,respectively,with the VNIR module achieving an IFoV of 0.125 mrad in the high-spatial-resolution mode.This study reports on land-cover surveys,pollution gas detection,mineral exploration,coastal water detection,and plant investigations conducted using AMMIS,highlighting its excellent performance.Furthermore,we present three hyperspectral datasets with diverse scene distributions and categories suitable for developing artificial intelligence algorithms.This study paves the way for next-generation airborne and spaceborne hyperspectral payloads and serves as a valuable reference for hyperspectral sensor designers and data users.展开更多
Identifier resolution system in the automotive industrial Internet is necessary for building a fully interconnected infrastructure with people,machines,factories,products and clients.The resolution system can not only...Identifier resolution system in the automotive industrial Internet is necessary for building a fully interconnected infrastructure with people,machines,factories,products and clients.The resolution system can not only ensure the comprehensive interconnection and efficiency of research and development,procurement,production,sales,and after-sales service in automotive industry,but also promote the integration of automotive industrial data,which facilitates the integrated development of traditional automotive manufacturing and the industrial Internet.This paper focuses on processes and methods of building identifier resolution system for the automotive industry and summarizes the construction and development of secondary node in the automotive industrial Internet in order to explore a suitable road to a rich and completed application ecosystem.展开更多
The industrial Internet realizes intelligent control and optimized operation of the industrial system through network interconnection.The industrial Internet identifier is the core element to accomplish this task.The ...The industrial Internet realizes intelligent control and optimized operation of the industrial system through network interconnection.The industrial Internet identifier is the core element to accomplish this task.The traditional industrial Internet identifier resolution technologies depend excessively on IP networks,and cannot meet the requirements of ubiquitous resource-restraint Internet of Things(IoT)devices.An industrial Internet identifier resolution management strategy based on multi-identifier network architecture is proposed in this paper,which supports content names,identities,locations,apart from the traditional IP address.The application of multiple types of identifiers not only solves the problem of IP addresses exhaustion,but also enhances the security,credibility,and availability of the industrial Internet identification resolution system.An inter-translation scheme between multiple identifiers is designed to support multiple identifiers and the standard ones.We present an addressing and routing algorithm for identifier resolution to make it convenient to put our strategy into practice.展开更多
The industrial Internet has germinated with the integration of the traditional industry and information technologies.An identifier is the identification of an object in the industrial Internet.The identifier technolog...The industrial Internet has germinated with the integration of the traditional industry and information technologies.An identifier is the identification of an object in the industrial Internet.The identifier technology is a method to validate the identification of an object and trace it.The identifier is a bridge to connect information islands in the industry,as well as the data basis for building a technology application ecosystem based on identifier resolution.We propose three practical applications and application scenarios of the industrial Internet identifier in this paper.Future applications of identifier resolution in the industrial Internet field are also presented.展开更多
Online tracking mechanisms employed by internet companies for user profiling and targeted advertising raise major privacy concerns. Despite efforts to defend against these mechanisms, they continue to evolve, renderin...Online tracking mechanisms employed by internet companies for user profiling and targeted advertising raise major privacy concerns. Despite efforts to defend against these mechanisms, they continue to evolve, rendering many existing defences ineffective. This study performs a large-scale measurement of online tracking mechanisms across a large pool of websites using the OpenWPM (Open Web Privacy Measurement) platform. It systematically evaluates the effectiveness of several ad blockers and underlying Privacy Enhancing Technologies (PET) that are primarily used to mitigate different tracking techniques. By quantifying the strengths and limitations of these tools against modern tracking methods, the findings highlight gaps in existing privacy protections. Actionable recommendations are provided to enhance user privacy defences, guide tool developers and inform policymakers on addressing invasive online tracking practices.展开更多
目的高分辨磁共振3D黑血技术评估评估左侧症状性颅外颈动脉斑块与同侧大脑中动脉病变卒中严重程度及预后的关系。方法回顾性选择2021年1月1日至2023年1月1日于我院进行颈动脉高分辨磁共振3D黑血技术检查的127例急性缺血性卒中患者(acute...目的高分辨磁共振3D黑血技术评估评估左侧症状性颅外颈动脉斑块与同侧大脑中动脉病变卒中严重程度及预后的关系。方法回顾性选择2021年1月1日至2023年1月1日于我院进行颈动脉高分辨磁共振3D黑血技术检查的127例急性缺血性卒中患者(acute ischemic stroke,AIS)为研究对象。根据是否伴有同侧大脑中动脉严重狭窄或闭塞,分为伴有组(46例)和不伴组(81例)。对比两组患者年龄、性别、体质量(body mass index,BMI)、血压、高血压史等一般临床资料及左侧颅外颈动脉斑块影像特征。EmpowerStats分层检验分析AIS患者颅外颈动脉斑块特征与同侧中动脉严重狭窄之间的关系。AIS患者病发3个月后,根据改良Rankin量表评分,分为预后良好组74例(≤2分)和预后不良组53例(≥3分),多因素Logistic回归分析AIS患者预后不良的相关性;ROC分析颅外颈动脉斑块特征对AIS预后不良的预测价值。结果伴有组和不伴组患者在高血压、糖尿病、尿酸(UA)、肌酐(Cre)、同行半胱氨酸(Hcy)、入院NIHSS评分、出院NIHSS评分、出院3个月后MRS评分方面具有显著差异(P<0.05)。颅外颈动脉斑块结果显示,结果显示,伴有组患者计算标准化管壁指数(NWI)、斑块内出血(IPH)体积、颈动脉重度狭窄、富含脂质的坏死核心(LRNC)、易损斑块发生率均显著高于不伴组患者,血管平均管腔面积(LA)显著低于不伴组患者(P<0.05)。EmpowerStats分层交互检验结果显示,颅外颈动脉斑块特征与同侧中动脉严重狭窄之间的关系稳定存在。预后不良组和预后良好组AIS患者在吸烟史、糖尿病史、Cre、Hcy、入院NIHSS评分、伴MCA严重狭窄、LA、管壁厚度(WT)、有钙化、有IPH、IPH体积方面的差异具有统计学意义(P<0.05)。多因素结果显示,入院NIHSS评分、伴大脑中动脉(MCA)严重狭窄、WT、有IPH、是易损斑块、IPH体积为AIS患者预后不良影响因素,其中WT、易损斑块、IPH体积是判断AIS患者预后不良的较强影响因素,对AIS患者预后不良具有较高的预测价值。结论症状性AIS患者左侧颈动脉易损斑块特征与同侧严重狭窄具有相关性,WT、易损斑块、IPH体积等颈动脉斑块特征是AIS患者预后不良的较强影响因素,具有较高预测价值。展开更多
基金supported by the Shanghai Industrial Collaborative Innovation Fund(HCXBCY-2021-001)the Academy of Finland(349229)。
文摘Airborne hyperspectral imaging spectrometers have been used for Earth observation over the past four decades.Despite the high sensitivity of push-broom hyperspectral imagers,they experience limited swath and wavelength coverage.In this study,we report the development of a push-broom airborne multimodular imaging spectrometer(AMMIS)that spans ultraviolet(UV),visible near-infrared(VNIR),shortwave infrared(SWIR),and thermal infrared(TIR)wavelengths.As an integral part of China's HighResolution Earth Observation Program,AMMIS is intended for civilian applications and for validating key technologies for future spaceborne hyperspectral payloads.It has been mounted on aircraft platforms such as Y-5,Y-12,and XZ-60.Since 2016,AMMIS has been used to perform more than 30 flight campaigns and gather more than 200 TB of hyperspectral data.This study describes the system design,calibration techniques,performance tests,flight campaigns,and applications of the AMMIS.The system integrates UV,VNIR,SWIR,and TIR modules,which can be operated in combination or individually based on the application requirements.Each module includes three spectrometers,utilizing field-of-view(FOV)stitching technology to achieve a 40°FOV,thereby enhancing operational efficiency.We designed advanced optical systems for all modules,particularly for the TIR module,and employed cryogenic optical technology to maintain optical system stability at 100 K.Both laboratory and in-flight calibrations were conducted to improve preprocessing accuracy and produce high-quality hyperspectral data.The AMMIS features more than 1400 spectral bands,with spectral sampling intervals of 0.1 nm for UV,2.4 nm for VNIR,3 nm for SWIR,and 32 nm for TIR.In addition,the instantaneous fields of view(IFoVs)for the four modules were 0.5,0.25,0.5,and 1 mrad,respectively,with the VNIR module achieving an IFoV of 0.125 mrad in the high-spatial-resolution mode.This study reports on land-cover surveys,pollution gas detection,mineral exploration,coastal water detection,and plant investigations conducted using AMMIS,highlighting its excellent performance.Furthermore,we present three hyperspectral datasets with diverse scene distributions and categories suitable for developing artificial intelligence algorithms.This study paves the way for next-generation airborne and spaceborne hyperspectral payloads and serves as a valuable reference for hyperspectral sensor designers and data users.
文摘Identifier resolution system in the automotive industrial Internet is necessary for building a fully interconnected infrastructure with people,machines,factories,products and clients.The resolution system can not only ensure the comprehensive interconnection and efficiency of research and development,procurement,production,sales,and after-sales service in automotive industry,but also promote the integration of automotive industrial data,which facilitates the integrated development of traditional automotive manufacturing and the industrial Internet.This paper focuses on processes and methods of building identifier resolution system for the automotive industry and summarizes the construction and development of secondary node in the automotive industrial Internet in order to explore a suitable road to a rich and completed application ecosystem.
基金supported in part by PCL Future Regional Network Facilities for Large-scale Experiments and Applications under Grant NO.PCL2018KP001by Guangdong R&D Key Program under Grant No.GD2016B030305005+3 种基金by National Natural Science Foundation of China(NSFC)under Grant No.61671001by National Key R&D Program of China under Grant No.2017YFB0803204by Shenzhen Research Programs under Grant Nos.JSGG20170824095858416,JCYJ20190808155607340,and JCYJ20170306092030521This work is also supported by the Shenzhen Municipal Development and Reform Commission(Disciplinary Development Program for Data Sci⁃ence and Intelligent Computing).
文摘The industrial Internet realizes intelligent control and optimized operation of the industrial system through network interconnection.The industrial Internet identifier is the core element to accomplish this task.The traditional industrial Internet identifier resolution technologies depend excessively on IP networks,and cannot meet the requirements of ubiquitous resource-restraint Internet of Things(IoT)devices.An industrial Internet identifier resolution management strategy based on multi-identifier network architecture is proposed in this paper,which supports content names,identities,locations,apart from the traditional IP address.The application of multiple types of identifiers not only solves the problem of IP addresses exhaustion,but also enhances the security,credibility,and availability of the industrial Internet identification resolution system.An inter-translation scheme between multiple identifiers is designed to support multiple identifiers and the standard ones.We present an addressing and routing algorithm for identifier resolution to make it convenient to put our strategy into practice.
文摘The industrial Internet has germinated with the integration of the traditional industry and information technologies.An identifier is the identification of an object in the industrial Internet.The identifier technology is a method to validate the identification of an object and trace it.The identifier is a bridge to connect information islands in the industry,as well as the data basis for building a technology application ecosystem based on identifier resolution.We propose three practical applications and application scenarios of the industrial Internet identifier in this paper.Future applications of identifier resolution in the industrial Internet field are also presented.
文摘Online tracking mechanisms employed by internet companies for user profiling and targeted advertising raise major privacy concerns. Despite efforts to defend against these mechanisms, they continue to evolve, rendering many existing defences ineffective. This study performs a large-scale measurement of online tracking mechanisms across a large pool of websites using the OpenWPM (Open Web Privacy Measurement) platform. It systematically evaluates the effectiveness of several ad blockers and underlying Privacy Enhancing Technologies (PET) that are primarily used to mitigate different tracking techniques. By quantifying the strengths and limitations of these tools against modern tracking methods, the findings highlight gaps in existing privacy protections. Actionable recommendations are provided to enhance user privacy defences, guide tool developers and inform policymakers on addressing invasive online tracking practices.
文摘目的高分辨磁共振3D黑血技术评估评估左侧症状性颅外颈动脉斑块与同侧大脑中动脉病变卒中严重程度及预后的关系。方法回顾性选择2021年1月1日至2023年1月1日于我院进行颈动脉高分辨磁共振3D黑血技术检查的127例急性缺血性卒中患者(acute ischemic stroke,AIS)为研究对象。根据是否伴有同侧大脑中动脉严重狭窄或闭塞,分为伴有组(46例)和不伴组(81例)。对比两组患者年龄、性别、体质量(body mass index,BMI)、血压、高血压史等一般临床资料及左侧颅外颈动脉斑块影像特征。EmpowerStats分层检验分析AIS患者颅外颈动脉斑块特征与同侧中动脉严重狭窄之间的关系。AIS患者病发3个月后,根据改良Rankin量表评分,分为预后良好组74例(≤2分)和预后不良组53例(≥3分),多因素Logistic回归分析AIS患者预后不良的相关性;ROC分析颅外颈动脉斑块特征对AIS预后不良的预测价值。结果伴有组和不伴组患者在高血压、糖尿病、尿酸(UA)、肌酐(Cre)、同行半胱氨酸(Hcy)、入院NIHSS评分、出院NIHSS评分、出院3个月后MRS评分方面具有显著差异(P<0.05)。颅外颈动脉斑块结果显示,结果显示,伴有组患者计算标准化管壁指数(NWI)、斑块内出血(IPH)体积、颈动脉重度狭窄、富含脂质的坏死核心(LRNC)、易损斑块发生率均显著高于不伴组患者,血管平均管腔面积(LA)显著低于不伴组患者(P<0.05)。EmpowerStats分层交互检验结果显示,颅外颈动脉斑块特征与同侧中动脉严重狭窄之间的关系稳定存在。预后不良组和预后良好组AIS患者在吸烟史、糖尿病史、Cre、Hcy、入院NIHSS评分、伴MCA严重狭窄、LA、管壁厚度(WT)、有钙化、有IPH、IPH体积方面的差异具有统计学意义(P<0.05)。多因素结果显示,入院NIHSS评分、伴大脑中动脉(MCA)严重狭窄、WT、有IPH、是易损斑块、IPH体积为AIS患者预后不良影响因素,其中WT、易损斑块、IPH体积是判断AIS患者预后不良的较强影响因素,对AIS患者预后不良具有较高的预测价值。结论症状性AIS患者左侧颈动脉易损斑块特征与同侧严重狭窄具有相关性,WT、易损斑块、IPH体积等颈动脉斑块特征是AIS患者预后不良的较强影响因素,具有较高预测价值。
