We-map is an interactive mobile map that can be easily communicated and applied on personal electronic devices,such as personal computers and mobile phones.Therefore,the study of direction systems and coordinate syste...We-map is an interactive mobile map that can be easily communicated and applied on personal electronic devices,such as personal computers and mobile phones.Therefore,the study of direction systems and coordinate systems is critical,and exploring reference frames is essential in direction and coordinate systems.Despite its significance,existing research on We-map lacks specific solutions for the exploration of reference frames is indispensable for the establishment of accurate direction and coordinate systems.In this paper,we endeavor to address this gap by elucidating the significance of We-map reference frames,defining them with mathematical constraints,summarizing their nature and characteristics,deriving their transformation relationships and representing them through mathematical formulars and equations.Our work contributes to the fundamental theory of We-map and provides valuable systems and support for the mathematical foundation of We-map,map production,and platform development.Ultimately,this research serves to advance the development of We-map.展开更多
With the increasingly serious issue of ' Food Quality and Safety', thequestion of 'whether people can get hygienic and healthy food' has been a social concern attractingmuch attention from the Chinese ...With the increasingly serious issue of ' Food Quality and Safety', thequestion of 'whether people can get hygienic and healthy food' has been a social concern attractingmuch attention from the Chinese government. In Oct. 2004, the State Council issued Resolutions onStrengthening Food Safety to tighten up the supervision and management of food safety. The GeneralAdministration of Quality Supervision, Inspection and Quarantine of the People's Republic of China(A-QSIQ), in order to take effective measures to do the work of food safety well, has requested thatall the departments and subordinates of quality inspection and quarantine should strengthen thedevelopment of food quality inspection system to set up an Integrated inspection and testing systemfor food safety, especially, more attention should be paid to the training and building of the staffand technique.展开更多
微地图作为自媒体时代出现的新型地图,具有大众参与、个性化、快速传播等特征,然而现有微地图研究在点符号设计方面存在一定局限,难以完全满足大众个性化制图的需求。为解决这一问题,本文从微地图制作角度出发,选择手绘地图的通用地图...微地图作为自媒体时代出现的新型地图,具有大众参与、个性化、快速传播等特征,然而现有微地图研究在点符号设计方面存在一定局限,难以完全满足大众个性化制图的需求。为解决这一问题,本文从微地图制作角度出发,选择手绘地图的通用地图符号作为研究对象,构建了一个包含多种类型和样式的手绘地图数据集。在现有研究的基础上,通过对比选择目标检测中常用的YOLOv5(You Only Look Once v5)系列模型,深入探索手绘地图中通用地图符号的自动提取方法,并采用YOLOv5-X模型进行手绘地图通用地图符号的提取。实验结果显示,该模型在手绘地图数据集上的point类别提取精确度、召回率和F1得分分别达到了98.42%、94.72%和97%。同时在Quick Draw涂鸦数据集上进行模型泛化能力的测试,本文所使用的模型在该数据集上展现出良好的提取效果。本研究的开展不仅扩充了微地图个性化点符号的研究数据集,还改进了通用地图符号的提取方法,为微地图制图注入了更多元化的元素,也为自媒体时代的地图制作提供了更为灵活和个性化的解决方案。展开更多
基金Industrial Support and Program Project of Universities in Gansu Province(No.2022CYZC-30)National Natural Science Foundation of China(Nos.42430108,41930101)China Scholarship Council(No.202306180085).
文摘We-map is an interactive mobile map that can be easily communicated and applied on personal electronic devices,such as personal computers and mobile phones.Therefore,the study of direction systems and coordinate systems is critical,and exploring reference frames is essential in direction and coordinate systems.Despite its significance,existing research on We-map lacks specific solutions for the exploration of reference frames is indispensable for the establishment of accurate direction and coordinate systems.In this paper,we endeavor to address this gap by elucidating the significance of We-map reference frames,defining them with mathematical constraints,summarizing their nature and characteristics,deriving their transformation relationships and representing them through mathematical formulars and equations.Our work contributes to the fundamental theory of We-map and provides valuable systems and support for the mathematical foundation of We-map,map production,and platform development.Ultimately,this research serves to advance the development of We-map.
文摘With the increasingly serious issue of ' Food Quality and Safety', thequestion of 'whether people can get hygienic and healthy food' has been a social concern attractingmuch attention from the Chinese government. In Oct. 2004, the State Council issued Resolutions onStrengthening Food Safety to tighten up the supervision and management of food safety. The GeneralAdministration of Quality Supervision, Inspection and Quarantine of the People's Republic of China(A-QSIQ), in order to take effective measures to do the work of food safety well, has requested thatall the departments and subordinates of quality inspection and quarantine should strengthen thedevelopment of food quality inspection system to set up an Integrated inspection and testing systemfor food safety, especially, more attention should be paid to the training and building of the staffand technique.
文摘微地图作为自媒体时代出现的新型地图,具有大众参与、个性化、快速传播等特征,然而现有微地图研究在点符号设计方面存在一定局限,难以完全满足大众个性化制图的需求。为解决这一问题,本文从微地图制作角度出发,选择手绘地图的通用地图符号作为研究对象,构建了一个包含多种类型和样式的手绘地图数据集。在现有研究的基础上,通过对比选择目标检测中常用的YOLOv5(You Only Look Once v5)系列模型,深入探索手绘地图中通用地图符号的自动提取方法,并采用YOLOv5-X模型进行手绘地图通用地图符号的提取。实验结果显示,该模型在手绘地图数据集上的point类别提取精确度、召回率和F1得分分别达到了98.42%、94.72%和97%。同时在Quick Draw涂鸦数据集上进行模型泛化能力的测试,本文所使用的模型在该数据集上展现出良好的提取效果。本研究的开展不仅扩充了微地图个性化点符号的研究数据集,还改进了通用地图符号的提取方法,为微地图制图注入了更多元化的元素,也为自媒体时代的地图制作提供了更为灵活和个性化的解决方案。
