Based on the measurement parameters and index in the Specifications for Assessment of Forest Ecosystem Services in China(LY/T 1721-2008),the value of ecological service functions of ecological public welfare forest in...Based on the measurement parameters and index in the Specifications for Assessment of Forest Ecosystem Services in China(LY/T 1721-2008),the value of ecological service functions of ecological public welfare forest in Wenchang City was evaluated and analyzed.The results show that the total value of ecosystem service function of ecological public welfare forests in Wenchang City is about 4.020 billion yuan,of which storage capacity,water purification,soil fixation,fertilizer(N,P and K fertilizer) conservation,carbon sequestration,oxygen release,forest nutrient accumulation,providing anion,absorbing SO_2,absorbing fluoride,absorbing NxO,absorbing soil heavy metals,dust retention,noise reduction,sterilization,forest protection,forest biodiversity protection,and forest recreation(ecological tourism) are about 1.510 billion,582.256 million,3.769 million,268.220 million,116.360 million,2.747 million,22.682 million,42.817 million,1.722 million,74,600,131,900,187.918 million,77.409 million,28.721 million,43.090 million,180.696 million,571.036 million,and 108.677 million yuan展开更多
With the rapid development of Chinese economy, more and more foreigners have been attracted to China to invest, work, study and travel. To help the foreigners better understand China and facilitate cross-cultural comm...With the rapid development of Chinese economy, more and more foreigners have been attracted to China to invest, work, study and travel. To help the foreigners better understand China and facilitate cross-cultural communication, bilingual or even trilingual public signs spring up in every part of China. As is known that public signs, usually in the form of a few words, a picture or words accompanied with a picture, function not only as a " face" of a city and a nation, but also as a first calling card given to the foreigners. Moreover, public signs have definite functions-informing, warning or directing. However, to our disappointment, mistranslations of the public signs are present everywhere.展开更多
针对当前应急消防、安防巡检等场景中车底螺栓检测系统普遍存在的目标检测计算量大、推理速度慢、模型复杂度高等问题,提出了一种基于YOLOv5s的轻量化车底螺栓目标检测系统。消防车辆底部螺栓长期承受高频振动和复杂路况冲击,易出现松...针对当前应急消防、安防巡检等场景中车底螺栓检测系统普遍存在的目标检测计算量大、推理速度慢、模型复杂度高等问题,提出了一种基于YOLOv5s的轻量化车底螺栓目标检测系统。消防车辆底部螺栓长期承受高频振动和复杂路况冲击,易出现松动、脱落等结构性隐患,严重威胁出警安全,需定期检测其紧固状态。为此,设计了具备工程适应性的轻量化检测模型。该系统在YOLOv5s的基础上进行了三方面优化:引入双向特征金字塔网络(Bidirectional Feature Pyramid Network,BiFPN)结构提升小目标特征融合能力,采用Bottleneck残差结构通道剪枝以降低模型复杂度,并用更具几何表达能力的缩放交并比(Scaled Intersection over Union,SIOU)替代完全交并比(Complete Intersection over Union,CIOU),以提升预测框对螺栓边界的匹配精度。试验在自建的消防车辆车底模拟平台上开展,结果表明,YOLOv5sSC35%模型在平均精度均值mAP提升3.8百分点的同时,推理速度提升26.1%,参数量和计算量分别减小32.4%和50.1%。该方法能快速准确识别三类典型螺栓,误检漏检率显著降低,特别适用于边缘设备部署,如消防站内的车底检测机器人、便携式嵌入式检测终端等计算资源有限的设备场景。系统可集成到消防站现有的检测机器人或日常车辆维护流程中,识别准确率高,检测速度快,部署成本低,能显著提升底盘隐患排查效率,减少人工劳动。展开更多
基金Sponsored by Subsidy for the Running of National Positioning Observation Station of Forest Ecosystems in Wenchang City of Hainan Province(2015-LYPT-DW-095)
文摘Based on the measurement parameters and index in the Specifications for Assessment of Forest Ecosystem Services in China(LY/T 1721-2008),the value of ecological service functions of ecological public welfare forest in Wenchang City was evaluated and analyzed.The results show that the total value of ecosystem service function of ecological public welfare forests in Wenchang City is about 4.020 billion yuan,of which storage capacity,water purification,soil fixation,fertilizer(N,P and K fertilizer) conservation,carbon sequestration,oxygen release,forest nutrient accumulation,providing anion,absorbing SO_2,absorbing fluoride,absorbing NxO,absorbing soil heavy metals,dust retention,noise reduction,sterilization,forest protection,forest biodiversity protection,and forest recreation(ecological tourism) are about 1.510 billion,582.256 million,3.769 million,268.220 million,116.360 million,2.747 million,22.682 million,42.817 million,1.722 million,74,600,131,900,187.918 million,77.409 million,28.721 million,43.090 million,180.696 million,571.036 million,and 108.677 million yuan
文摘With the rapid development of Chinese economy, more and more foreigners have been attracted to China to invest, work, study and travel. To help the foreigners better understand China and facilitate cross-cultural communication, bilingual or even trilingual public signs spring up in every part of China. As is known that public signs, usually in the form of a few words, a picture or words accompanied with a picture, function not only as a " face" of a city and a nation, but also as a first calling card given to the foreigners. Moreover, public signs have definite functions-informing, warning or directing. However, to our disappointment, mistranslations of the public signs are present everywhere.
文摘针对当前应急消防、安防巡检等场景中车底螺栓检测系统普遍存在的目标检测计算量大、推理速度慢、模型复杂度高等问题,提出了一种基于YOLOv5s的轻量化车底螺栓目标检测系统。消防车辆底部螺栓长期承受高频振动和复杂路况冲击,易出现松动、脱落等结构性隐患,严重威胁出警安全,需定期检测其紧固状态。为此,设计了具备工程适应性的轻量化检测模型。该系统在YOLOv5s的基础上进行了三方面优化:引入双向特征金字塔网络(Bidirectional Feature Pyramid Network,BiFPN)结构提升小目标特征融合能力,采用Bottleneck残差结构通道剪枝以降低模型复杂度,并用更具几何表达能力的缩放交并比(Scaled Intersection over Union,SIOU)替代完全交并比(Complete Intersection over Union,CIOU),以提升预测框对螺栓边界的匹配精度。试验在自建的消防车辆车底模拟平台上开展,结果表明,YOLOv5sSC35%模型在平均精度均值mAP提升3.8百分点的同时,推理速度提升26.1%,参数量和计算量分别减小32.4%和50.1%。该方法能快速准确识别三类典型螺栓,误检漏检率显著降低,特别适用于边缘设备部署,如消防站内的车底检测机器人、便携式嵌入式检测终端等计算资源有限的设备场景。系统可集成到消防站现有的检测机器人或日常车辆维护流程中,识别准确率高,检测速度快,部署成本低,能显著提升底盘隐患排查效率,减少人工劳动。
