搜索到3406篇“ FENCE“的相关文章
Voice Fence Wall:User-optional voice privacy transmission
2024年
Sensors are widely applied in the collection of voice data.Since many attributes of voice data are sensitive such as user emotions,identity,raw voice collection may lead serious privacy threat.In the past,traditional feature extraction obtains and encrypts voice features that are then transmitted to upstream servers.In order to avoid sensitive attribute disclosure,it is necessary to separate the sensitive attributes from non-sensitive attributes of voice data.Motivated by this,user-optional privacy transmission framework for voice data(called:Voice Fence Wall)is proposed.Firstly,we provide user-optional,which means users can choose the attributes(sensitive attributes)they want to be protected.Secondly,Voice Fence Wall utilizes minimum mutual information(MI)to reduce the correlation between sensitive and non-sensitive attributes,thereby separating these attributes.Finally,only the separated non-sensitive attributes are transmitted to the upstream server,the quality of voice services is satisfied without leaking sensitive attributes.To verify the reliability and practicability,three voice datasets are used to evaluate the model,the experiments demonstrate that Voice Fence Wall not only effectively separates attributes to resist attribute inference attacks,but also outperforms related work in terms of classification performance.Specifically,our framework achieves 89.84%accuracy in sentiment recognition and 6.01%equal error rate in voice authentication.
Li LuoYining Liu
Local failure mechanism of sand-blocking fence in latticed dune along desert roads
2024年
The latticed dunes in the Tengger Desert are widely distributed,and the sand-blocking fence placed here are highly susceptible to local failure due to complex wind-sand activities,posing a serious threat to the safe operation of the highway.To explore the local failure mechanism of sand-blocking fence in the latticed dune area,the local failure of sand-blocking fence in the latticed dune areas along the Wuhai-Maqin Highway in China was observed.Taking the first main ridge of the latticed dune as the placement location,the structure of the wind-sand flow field of sand-blocking fence placed at top,the bottom and the middle of windward slope was analyzed by Computational Fluid Dynamics(CFD).The results show that when placed at top of the first main ridge,the wind speed near the sand-blocking fence is the highest,up to 15.23 m/s.Therefore,the wind load strength on the sand barrier is correspondingly larger,up to 232.61 N∙m-2.As the strength of material continues to decrease,the nylon net is prone to breakage.The roots of the angle steel posts are susceptible to hollowing by vortex action,which can cause sand-blocking fence to fall over in strong wind conditions.When placed at the bottom of windward slope,wind speed drop near sand-blocking fence is greatest,with the decrease of 12.48-14.32 m/s compared to the original wind speed.This is highly likely to lead to large-scale deposition of sand particles and burial of the sand-blocking fence.When placed in the middle of windward slope,sand-blocking fence is subjected to less wind load strength(168.61N∙m-2)and sand particles are mostly deposited at the bottom of windward slope,with only a small amount of sand accumulating at the root of sand-blocking fence.Based on field observations and numerical modelling results,when the sand-blocking fence is placed in latticed dune area,it should be placed in the middle of the windward slope of the first main ridge as a matter of priority.Besides the sand-blocking fence should be placed at the top of the first main ridge,and sand
LI LiangyingLV LeleLI QiWANG ZhenqiangYANG YouhaiYIN Wenhua
论多丽丝·皮金顿小说中的后殖民生态书写——从《漫漫回家路》中的“栅栏”意象谈起
2024年
皮金顿的《漫漫回家路》以传统的澳洲原住民口述故事为基础,利用栅栏这一核心意象,折射出殖民入侵后澳洲原住民的生存境遇及其历史文化的变迁。本文透过后殖民生态批评理论视野,检视该著中兼具生态意涵和殖民话语的文化意象——“栅栏”的复杂内涵,揭露欧洲殖民者对西澳大利亚的生态殖民和文化殖民,挖掘作品中的后殖民生态意蕴,敞亮原住民抵抗殖民的文化与现实路径,凸显在全球化进程中多民族文化交融和人与自然和谐共存的重要价值。
胡志红张宇帆
关键词:种族主义
Flow field, sedimentation, and erosion characteristics around folded linear HDPE sheet sand fence: Numerical simulation study被引量:1
2024年
Wind and sand hazards are serious in the Milan Gobi area of the Xinjiang section of the Korla Railway. In order to ensure the safe operation of railroads, there is a need for wind and sand protection in heavily sandy areas. The wind and sand flow in the region is notably bi-directional. To shield railroads from sand, a unique sand fence made of folded linear high-density polyethylene(HDPE) is used, aligning with the principle that the dominant wind direction is perpendicular to the fence. This study employed field observations and numerical simulations to investigate the effectiveness of these HDPE sand fences in altering flow field distribution and offering protection. It also explored how these fences affect the deposition and erosion of sand particles. Findings revealed a significant reduction in wind speed near the fence corner;the minimum horizontal wind speed on the leeward side of the first sand fence(LSF) decreased dramatically from 3 m/s to 0.64 m/s. The vortex area on the LSF markedly impacted horizontal wind speeds. Within the LSF, sand deposition was a primary occurrence. As wind speeds increased, the deposition zone shrank, whereas the positive erosion zone expanded. Close to the folded corners of the HDPE sand fence, there was a notable shift from the positive erosion zone to a deposition zone. Field tests and numerical simulations confirmed the high windproof efficiency(WE) and sand resistance efficiency(SE) in the HDPE sand fence. Folded linear HDPE sheet sand fence can effectively slow down the incoming flow and reduce the sand content, thus achieving good wind and sand protection. This study provides essential theoretical guidance for the design and improvement of wind and sand protection systems in railroad engineering.
ZHANG KaiZHANG HailongTIAN JianjinQU JianjunZHANG XingxinWANG ZhenghuiXIAO jianhua
围栏(fence
1.本外观设计产品的名称:围栏(fence)。;2.本外观设计产品的用途:用于围栏。;3.本外观设计产品的设计要点:在于形状。;4.最能表明设计要点的图片或照片:立体图。
吕静
电子围栏的应用设计
2024年
安防系统是当前社会的发展热点,基于此,设计了一款以STM32F103C8T6为核心的新型电子围栏。该设计以反激拓扑为基础,通过两次升压产生脉冲,通过反馈进行判断系统是否发生入侵事件。实现对布置电子围栏地区安防的实时监测。该设计体积小、灵敏度高,可实现24小时监控,完全契合当前安防系统小型化、可靠性高的发展趋势。
纪一凡宁闯
关键词:电子围栏STM32升压脉冲
水电站智能安全围栏系统研究
2024年
建立智能安全围栏系统,对于推动水电站现场安全管控体系数字化转型极为重要。针对传统安全围栏的不足,提出了智能安全围栏装置设计方案,方案具有灵活移动、自动布防、智能报警、入侵感应等特点,研发了水电站安全围栏可视化布防平台,实现了装置管理、数据存储分析、实时监控以及自定义配置等功能,有效提升水电站安全监控和响应能力。
郭连恒周彦何新根田杰
百香果篱架式栽培技术
2024年
百香果是热带藤本植物,营养非常丰富,香味独特,具有“百果之王”的美称,主蔓长达8~9 m,在栽培中采用搭架栽培,既利于通风透光,减少病虫害的发生,也方便采摘。从果园选址、栽植、搭架、整枝修剪、病虫害防治等方面,对百香果篱架式栽培技术进行了总结,以供参考。
龙继岩
关键词:百香果栽培技术
一种基于IOT的智能电子围栏设计
2024年
针对电子围栏系统安全、经济和检测精度需求,提出一种智能电子围栏监控方案。设计电子围栏系统功能结构、系统架构,并在此基础上设计软硬件组成方案;提出电子围栏回波信号的预处理、特征提取和侵入行为检测模型;以某公司提供的电子围栏数据为基础,验证所提方案有效性。结果表明:该特征提取模型能够有效提取信号特征,提升分类性能,回波检测模型分类准确率为89.3%;该方案为电子围栏系统安全管理及稳定运行提供了一定借鉴。
朱志猛
关键词:电子围栏物联网回波信号特征提取
基于深度学习的家畜虚拟电子围栏设计
2024年
针对牧场中家畜越界及传统电子围栏难以防止家畜越界的问题,基于改进后的YOLOv5算法,设计了虚拟电子围栏。采用YOLOv5s算法作为基础,并进行了迁移学习和添加ECA注意力模块。利用PyTorch框架进行训练,并对模型进行了评估,相比原版YOLOv5s,改进YOLOv5s算法对黄牛的检测精确率、召回率、平均精度均值分别提升0.2、1.3、0.7个百分点,单帧推理总耗时下降0.5 ms。将改进后的模型转换为RKNN格式,并部署在带有NPU的RK3588开发板上,加快模型推理速度。结果表明,应用深度学习技术与ROI划定技术,成功设计了家畜虚拟电子围栏,优化智慧牧场的管理体系,提高管理效率,降低管理成本,具备一定的实用价值。
翁嘉杰毛战华
关键词:感兴趣区域家畜

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