In order to solve the problem of calculating ���������������� with different definitions of particles of arbitrary shapes and calculate the estimation of projection area caused by occlusion of 2D image probe photosensitive areas. This paper proposes a morphological preprocessing of the initial data and combines image spatial information and gray information algorithm to solve the problem of calculating ���������������� with different definitions of particles and the problem of estimating the projected area. The experimental result shows that based on this algorithm, ���������������� with different definitions of arbitrary shapes can be calculated, the occlusion problem of the photosensitive area can be solved, and the original particle shape is successfully restored, which has important meaning for our study in the fields of cloud physical characteristics analysis, atmospheric mode, and so on.
{"title":"Design and implementation of the maximum dimension algorithm for ice crystal particles recorded by 2D image probe","authors":"Zepei Wu, Shuo Liu, Ling Yang, Delong Zhao, Zi‐Xin Xu, Zhipeng Yang","doi":"10.1109/ICMO49322.2019.9076592","DOIUrl":"https://doi.org/10.1109/ICMO49322.2019.9076592","url":null,"abstract":"In order to solve the problem of calculating ���������������� with different definitions of particles of arbitrary shapes and calculate the estimation of projection area caused by occlusion of 2D image probe photosensitive areas. This paper proposes a morphological preprocessing of the initial data and combines image spatial information and gray information algorithm to solve the problem of calculating ���������������� with different definitions of particles and the problem of estimating the projected area. The experimental result shows that based on this algorithm, ���������������� with different definitions of arbitrary shapes can be calculated, the occlusion problem of the photosensitive area can be solved, and the original particle shape is successfully restored, which has important meaning for our study in the fields of cloud physical characteristics analysis, atmospheric mode, and so on.","PeriodicalId":257532,"journal":{"name":"2019 International Conference on Meteorology Observations (ICMO)","volume":"629 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116405450","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-12-28DOI: 10.1109/ICMO49322.2019.9076596
Wei Zhou, Lei Wu, Hui Wang, Feng Li, Xin-lei Yang, Ruiyi Li
This paper introduces the improved technical methods of L-band wind profile radar system based on the national networking wind profiler radar in China. Starting from the characteristics of clear-air atmospheric turbulence, considering the influence of atmospheric structural parameters on the detection effect, the L-band wind profiler radar is improved by improving the performance of key components and assembly process, optimization of wind profile radar system power, and reduction of feed line loss. The detection height can reach 6 km to meet the demand of weather forecast radar data. The detection performance of the improved L-band wind profiler radar is evaluated.
{"title":"Improvement of L-band Wind Profile Radar System","authors":"Wei Zhou, Lei Wu, Hui Wang, Feng Li, Xin-lei Yang, Ruiyi Li","doi":"10.1109/ICMO49322.2019.9076596","DOIUrl":"https://doi.org/10.1109/ICMO49322.2019.9076596","url":null,"abstract":"This paper introduces the improved technical methods of L-band wind profile radar system based on the national networking wind profiler radar in China. Starting from the characteristics of clear-air atmospheric turbulence, considering the influence of atmospheric structural parameters on the detection effect, the L-band wind profiler radar is improved by improving the performance of key components and assembly process, optimization of wind profile radar system power, and reduction of feed line loss. The detection height can reach 6 km to meet the demand of weather forecast radar data. The detection performance of the improved L-band wind profiler radar is evaluated.","PeriodicalId":257532,"journal":{"name":"2019 International Conference on Meteorology Observations (ICMO)","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114317162","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-12-28DOI: 10.1109/ICMO49322.2019.9085305
Zhang Yujie
The system realizes the comprehensive observation data display based on the radar data time axis. The radar echo intensity and time related observation data are superimposed on the GIS(Geographic Information System)layer, which can intuitively observe the real situation information of the weather system at fixed time and make relevant judgments.The server side of the system is designed and developed with MVC(Model View Controller)model, and the browser side is developed with HTML5 & JavaScript. The system uses spring 4.5 framework to complete the implementation of MVC model, realizes the functional layered design, and achieves the low coupling between layers.Based on the processing flow of time axis related to radar data, the association query of radar and related data is completed and the latest 36 time integrated KML(Keyhole Markup Language) format data is generated.In the background of the system, the class data is processed regularly to form the related data set of each node of the time axis. The time related data set of radar data is loaded automatically in KML format, and KML layer is formed in GIS.
该系统实现了基于雷达数据时间轴的综合观测数据显示。将雷达回波强度和与时间相关的观测数据叠加在GIS(Geographic Information System)层上，可以直观地观测到天气系统在固定时间的真实情况信息，并做出相关判断。系统的服务器端采用MVC(Model - View - Controller)模式设计和开发，浏览器端采用HTML5和JavaScript开发。系统采用spring 4.5框架完成MVC模型的实现，实现了功能的分层设计，实现了层与层之间的低耦合。根据雷达数据相关时间轴的处理流程，完成雷达与相关数据的关联查询，生成最新的36时间集成KML(Keyhole Markup Language)格式数据。在系统后台，对类数据进行定时处理，形成时间轴各节点的相关数据集。将雷达数据的时间相关数据集以KML格式自动加载，并在GIS中形成KML层。
{"title":"Design and Implementation of Integrated Data Display System Based on Radar Information","authors":"Zhang Yujie","doi":"10.1109/ICMO49322.2019.9085305","DOIUrl":"https://doi.org/10.1109/ICMO49322.2019.9085305","url":null,"abstract":"The system realizes the comprehensive observation data display based on the radar data time axis. The radar echo intensity and time related observation data are superimposed on the GIS(Geographic Information System)layer, which can intuitively observe the real situation information of the weather system at fixed time and make relevant judgments.The server side of the system is designed and developed with MVC(Model View Controller)model, and the browser side is developed with HTML5 & JavaScript. The system uses spring 4.5 framework to complete the implementation of MVC model, realizes the functional layered design, and achieves the low coupling between layers.Based on the processing flow of time axis related to radar data, the association query of radar and related data is completed and the latest 36 time integrated KML(Keyhole Markup Language) format data is generated.In the background of the system, the class data is processed regularly to form the related data set of each node of the time axis. The time related data set of radar data is loaded automatically in KML format, and KML layer is formed in GIS.","PeriodicalId":257532,"journal":{"name":"2019 International Conference on Meteorology Observations (ICMO)","volume":"2096 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129901466","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-12-28DOI: 10.1109/ICMO49322.2019.9076589
Jian Sun, Zhaoping Sun, Xinqiang Han, Chian Zhang
Currently, the National Meteorological Information Center (NMIC) uses the FTP service for base data exchanged. After the volume-based file is generated, it will be uploaded to Provincial Meteorological Information Center (PMIC) by file polling, then forwarded to NMIC in the same way. The end-users can only retrieve data after volume scan finished, it’s not suitable for time-critical applications such as nowcasting, moreover file polling and forwarding between transfer nodes will introduce additional delay. In this paper, we propose a technique to reduce the delay introduced by transmission. After radial data is generated by the signal processor, it is sent to the server of PMIC immediately, the server will collect real-time radial data from dozens of sites simultaneously and forward them to the server of NMIC and servers of other agencies as required. In such a scheme, the radial data will be got in less than one-second delay by endusers. Radar base data can be archived in elevation and distributed to applications that need a fast update. The system builds an efficient and stable base data transmission and distribution network, which greatly improves the efficiency of data transmission and applications.
{"title":"Design and Implementation of Real Time Base Data Transmission System for Weather Radar","authors":"Jian Sun, Zhaoping Sun, Xinqiang Han, Chian Zhang","doi":"10.1109/ICMO49322.2019.9076589","DOIUrl":"https://doi.org/10.1109/ICMO49322.2019.9076589","url":null,"abstract":"Currently, the National Meteorological Information Center (NMIC) uses the FTP service for base data exchanged. After the volume-based file is generated, it will be uploaded to Provincial Meteorological Information Center (PMIC) by file polling, then forwarded to NMIC in the same way. The end-users can only retrieve data after volume scan finished, it’s not suitable for time-critical applications such as nowcasting, moreover file polling and forwarding between transfer nodes will introduce additional delay. In this paper, we propose a technique to reduce the delay introduced by transmission. After radial data is generated by the signal processor, it is sent to the server of PMIC immediately, the server will collect real-time radial data from dozens of sites simultaneously and forward them to the server of NMIC and servers of other agencies as required. In such a scheme, the radial data will be got in less than one-second delay by endusers. Radar base data can be archived in elevation and distributed to applications that need a fast update. The system builds an efficient and stable base data transmission and distribution network, which greatly improves the efficiency of data transmission and applications.","PeriodicalId":257532,"journal":{"name":"2019 International Conference on Meteorology Observations (ICMO)","volume":"276 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121823678","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-12-28DOI: 10.1109/ICMO49322.2019.9076590
Zhang Wei, Yang Jie, Pu Li, Cheng Bing, Ling Chunhu
Modern radar system technology is in an important period of development from digital radar to software radar. The software radar signal processing system has become the general trend of research, which is closely related to the meteorological and hydrological application requirements of the current radar system. The signal processor of the CINRAD, as the core part of data acquisition and processing of radar system, directly affects the accuracy of weather process detection. In view of the disadvantages of the traditional digital radar development mode of ‘taking hardware technology as the core and facing special functions, a Doppler weather radar signal processing system based on software design is proposed, which effectively solves the disadvantages of tight coupling of traditional radar hardware design and realizes software and hardware decoupling. Through the modular and loose coupling design, the rapid development of software technology is used to realize the rapid development and design of new functions of software radar signal processing system. The results show that: 1) the engineering software Doppler weather radar signal processing system has the advantages of software, modularization and loose coupling. 2) The software research and development mode can quickly and effectively improve the resource allocation ability of radar signal processing system, quickly realize new demands, and meet the practical needs of rapid development. 3) shorten the research and development cycle and reduce the hardware cost. The software based signal processing system has been widely used in SC and CD weather radar of National Meteorological Administration, and gradually extended to the radar system of civil aviation, hydrology and power grid industry.
{"title":"Design and Implementation of Signal Processing for Software Doppler Weather Radar","authors":"Zhang Wei, Yang Jie, Pu Li, Cheng Bing, Ling Chunhu","doi":"10.1109/ICMO49322.2019.9076590","DOIUrl":"https://doi.org/10.1109/ICMO49322.2019.9076590","url":null,"abstract":"Modern radar system technology is in an important period of development from digital radar to software radar. The software radar signal processing system has become the general trend of research, which is closely related to the meteorological and hydrological application requirements of the current radar system. The signal processor of the CINRAD, as the core part of data acquisition and processing of radar system, directly affects the accuracy of weather process detection. In view of the disadvantages of the traditional digital radar development mode of ‘taking hardware technology as the core and facing special functions, a Doppler weather radar signal processing system based on software design is proposed, which effectively solves the disadvantages of tight coupling of traditional radar hardware design and realizes software and hardware decoupling. Through the modular and loose coupling design, the rapid development of software technology is used to realize the rapid development and design of new functions of software radar signal processing system. The results show that: 1) the engineering software Doppler weather radar signal processing system has the advantages of software, modularization and loose coupling. 2) The software research and development mode can quickly and effectively improve the resource allocation ability of radar signal processing system, quickly realize new demands, and meet the practical needs of rapid development. 3) shorten the research and development cycle and reduce the hardware cost. The software based signal processing system has been widely used in SC and CD weather radar of National Meteorological Administration, and gradually extended to the radar system of civil aviation, hydrology and power grid industry.","PeriodicalId":257532,"journal":{"name":"2019 International Conference on Meteorology Observations (ICMO)","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120926366","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-12-28DOI: 10.1109/ICMO49322.2019.9076595
Cao Kaiming, Li Cuicui, Ren Hengyi
The collection and communication hardware integrated controller units of the National Ground Observation Stations in Guizhou are improved, and the physical structures and embedded programs of DZZ4 collector are analyzed, An intelligent support platform is developed for data quality control, data transmission, operation status monitoring, remote fault diagnosis, fault maintenance and etc. The platform can meet the requirements of informatization and intensification observation operations, improve data availability, and prevent data loss from human factors. At it can improve the working efficiency of stations and reduce the workload of the staff.
{"title":"Design and Implementation of Intelligent Support System for National Ground Observation Stations in Guizhou","authors":"Cao Kaiming, Li Cuicui, Ren Hengyi","doi":"10.1109/ICMO49322.2019.9076595","DOIUrl":"https://doi.org/10.1109/ICMO49322.2019.9076595","url":null,"abstract":"The collection and communication hardware integrated controller units of the National Ground Observation Stations in Guizhou are improved, and the physical structures and embedded programs of DZZ4 collector are analyzed, An intelligent support platform is developed for data quality control, data transmission, operation status monitoring, remote fault diagnosis, fault maintenance and etc. The platform can meet the requirements of informatization and intensification observation operations, improve data availability, and prevent data loss from human factors. At it can improve the working efficiency of stations and reduce the workload of the staff.","PeriodicalId":257532,"journal":{"name":"2019 International Conference on Meteorology Observations (ICMO)","volume":"343 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116482613","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-12-28DOI: 10.1109/ICMO49322.2019.9085304
Zhao Lixia, Guo Wen, Liu Tao, Xiao Shengling, Li Wei, Zhu Ting
Typhoon has a great influence on the economy and people's livelihood along the ocean. It has the characteristics of fast moving speed, changeable direction and large wind pressure gradient. In order to accurately predict typhoon weather, it is necessary to establish a reasonable typhoon wind field model. In this paper, according to the atmospheric distribution around the typhoon formation area, the perennial climate characteristics and the typhoon formation mechanism, the mathematical models of the formation probability, moving speed, direction, pressure gradient, temperature, humidity and other physical characteristics of the typhoon are established, which provides the basis for the analysis of the ground and air regional flow field affected by the typhoon.
{"title":"Research on Typhoon Wind Field Modeling","authors":"Zhao Lixia, Guo Wen, Liu Tao, Xiao Shengling, Li Wei, Zhu Ting","doi":"10.1109/ICMO49322.2019.9085304","DOIUrl":"https://doi.org/10.1109/ICMO49322.2019.9085304","url":null,"abstract":"Typhoon has a great influence on the economy and people's livelihood along the ocean. It has the characteristics of fast moving speed, changeable direction and large wind pressure gradient. In order to accurately predict typhoon weather, it is necessary to establish a reasonable typhoon wind field model. In this paper, according to the atmospheric distribution around the typhoon formation area, the perennial climate characteristics and the typhoon formation mechanism, the mathematical models of the formation probability, moving speed, direction, pressure gradient, temperature, humidity and other physical characteristics of the typhoon are established, which provides the basis for the analysis of the ground and air regional flow field affected by the typhoon.","PeriodicalId":257532,"journal":{"name":"2019 International Conference on Meteorology Observations (ICMO)","volume":"90 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132450934","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-12-28DOI: 10.1109/ICMO49322.2019.9085306
Xiaobo Gai, Chen Ming
Adopting a quality management system is a strategic decision of the organization that can help it improve overall performance and lay a good foundation for sustainable development. The approach adopted by the quality management system standards combines the PDCA cycle with risk-based thinking. This method ensures adequate management and prevention control of ground meteorological observation technology methods, meteorological data operation and monitoring, meteorological equipment and support, meteorological products and services, and can minimize adverse effects. In July 2019, the Liaoning Provincial Meteorological Bureau issued the Liaoning Provincial Quality Management System Document, covering 34 quality documents, 74 operating instructions and 64 records, and started to carry out 4 direct reports in Liaoning Province in August including the internal audit of the meteorological bureau of 51 counties (districts, municipalities). The results of the internal audit of the integrated station indicate that the main risk points of the integrated meteorological observation quality.management system exist and internal and external processes. There are 131 general non-conformities and 374 proposed improvements, mainly corresponding to the quality management procedures 5.3 and 5.4, GB/T19001-2016, 7.1.3 and 8.1.d. Combing the business processes and regulatory systems between observation, monitoring, security and technological improvement can improve the standardization and legalization of meteorological observation services and improve the practicality and implementation of standard specifications.
{"title":"Application of Quality Management System Standards in Comprehensive Meteorological Observation of Stations","authors":"Xiaobo Gai, Chen Ming","doi":"10.1109/ICMO49322.2019.9085306","DOIUrl":"https://doi.org/10.1109/ICMO49322.2019.9085306","url":null,"abstract":"Adopting a quality management system is a strategic decision of the organization that can help it improve overall performance and lay a good foundation for sustainable development. The approach adopted by the quality management system standards combines the PDCA cycle with risk-based thinking. This method ensures adequate management and prevention control of ground meteorological observation technology methods, meteorological data operation and monitoring, meteorological equipment and support, meteorological products and services, and can minimize adverse effects. In July 2019, the Liaoning Provincial Meteorological Bureau issued the Liaoning Provincial Quality Management System Document, covering 34 quality documents, 74 operating instructions and 64 records, and started to carry out 4 direct reports in Liaoning Province in August including the internal audit of the meteorological bureau of 51 counties (districts, municipalities). The results of the internal audit of the integrated station indicate that the main risk points of the integrated meteorological observation quality.management system exist and internal and external processes. There are 131 general non-conformities and 374 proposed improvements, mainly corresponding to the quality management procedures 5.3 and 5.4, GB/T19001-2016, 7.1.3 and 8.1.d. Combing the business processes and regulatory systems between observation, monitoring, security and technological improvement can improve the standardization and legalization of meteorological observation services and improve the practicality and implementation of standard specifications.","PeriodicalId":257532,"journal":{"name":"2019 International Conference on Meteorology Observations (ICMO)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131128001","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-12-28DOI: 10.1109/ICMO49322.2019.9076594
Yao Wen, Zhang Jing, Wang Huan
The application of Weather Radar Standard Base Data Format solves the phenomenon that a variety of basic data file formats coexist in CINRAD Weather Radar for a long time. In business application terminals, only the Standard Base Data Format method is needed to analyze all the Base Data of the CINRAD Weather Radar Base Data. This paper present an analysis of the Weather Radar Standard Base Data, and introduces how to use the Python programming language to perform data reading and other graphical operations on the Weather Radar Standard Base Data format.
气象雷达标准基础数据格式的应用，解决了CINRAD气象雷达长期以来多种基础数据文件格式并存的现象。在业务应用终端中，只需要使用Standard Base Data Format方法分析CINRAD天气雷达基础数据的所有基础数据。本文对天气雷达标准基础数据进行了分析，介绍了如何使用Python编程语言对天气雷达标准基础数据格式进行数据读取和其他图形化操作。
{"title":"Application of Python in Weather Radar Standard Base Data","authors":"Yao Wen, Zhang Jing, Wang Huan","doi":"10.1109/ICMO49322.2019.9076594","DOIUrl":"https://doi.org/10.1109/ICMO49322.2019.9076594","url":null,"abstract":"The application of Weather Radar Standard Base Data Format solves the phenomenon that a variety of basic data file formats coexist in CINRAD Weather Radar for a long time. In business application terminals, only the Standard Base Data Format method is needed to analyze all the Base Data of the CINRAD Weather Radar Base Data. This paper present an analysis of the Weather Radar Standard Base Data, and introduces how to use the Python programming language to perform data reading and other graphical operations on the Weather Radar Standard Base Data format.","PeriodicalId":257532,"journal":{"name":"2019 International Conference on Meteorology Observations (ICMO)","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124906761","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：