期刊文献+
共找到2篇文章
< 1 >
每页显示 20 50 100
我国大型滑雪旅游度假区环境预警管理研究——以亚布力滑雪旅游度假区为例 被引量:3
1
作者 王萍 朱志强 +1 位作者 费郁红 丛军 《哈尔滨体育学院学报》 2020年第5期26-30,共5页
环境预警管理研究直接关系到旅游地区的生态平衡和旅游质量的高低,大型滑雪旅游度假区是滑雪产业发展的核心和滑雪人口培养的基地。因此,本文基于滑雪旅游资源的特点,借助改进的生态足迹评价模型,选择亚布力滑雪旅游度假区为测评对象,... 环境预警管理研究直接关系到旅游地区的生态平衡和旅游质量的高低,大型滑雪旅游度假区是滑雪产业发展的核心和滑雪人口培养的基地。因此,本文基于滑雪旅游资源的特点,借助改进的生态足迹评价模型,选择亚布力滑雪旅游度假区为测评对象,对度假区环境承载力进行分析,并在此基础上确立了滑雪旅游环境承载容量的预警区间和环境驱动因子。研究结果表明,2007—2016年间亚布力滑雪旅游度假区生态足迹随时间呈上升趋势(1.73~1.82 ha/cap),2014年滑雪旅游环境承载容量最低,环境预警指数(EEWI=2)等级最低,人均生态足迹受社会经济发展和滑雪旅游人口增长因素影响较大。未来可以通过建立生态基线、分区保护和开发等手段有效地将滑雪旅游环境承载容量控制在合理的区间之内。 展开更多
关键词 滑雪旅游度假区 环境承载容量 驱动因子 预警管理
下载PDF
Detection of leaf folder and yellow stemborer moths in the paddy field using deep neural network with search and rescue optimization 被引量:5
2
作者 Chiranjeevi Muppala Velmathi Guruviah 《Information Processing in Agriculture》 EI 2021年第2期350-358,共9页
In agriculture,insect pests must be identified at the initial stage of infestation to avoid their spread in the field.Leaf folders(cnaphalocrocis medinalis)and yellow stemborers(scirpophaga incertulas)are destructive ... In agriculture,insect pests must be identified at the initial stage of infestation to avoid their spread in the field.Leaf folders(cnaphalocrocis medinalis)and yellow stemborers(scirpophaga incertulas)are destructive pests of paddy crops,which are causing severe yield loss.Manual identification of insect pests in the crop is time-consuming,tedious,and ineffective.This paper focuses on a light trap based four-layer deep neural network with search and rescue optimization(DNN-SAR)method to identify leaf folders and yellow stemborers.Light traps are designed to lure the insects in the paddy field and the images of trapped insects are analyzed using the proposed detection method.In the DNN-SAR,images are contrastenhanced using deer hunting algorithm,impulse noise is removed with fast average group filter,and segmented using social ski-driver optimization.The search and rescue optimization algorithm is used for the selection of optimal weights in the deep neural network,which has improved the convergence rate,lowered the complexity of learning,and improved the accuracy of detection.The proposed method outperformed the existing methods and achieved 98.29%pest detection accuracy. 展开更多
关键词 Yellow stemborer Leaf folder Social ski-driver optimization Search and rescue optimization Deep neural network
原文传递
上一页 1 下一页 到第
使用帮助 返回顶部