排序方式: 共有111条查询结果,搜索用时 296 毫秒
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针对农作物病害图像识别模型存在参数量较大内存占用较多、识别准确率不高及训练速度慢等问题,提出了融合注意力模块的多尺度卷积网络叶片病害图像识别模型。该网络模型基于残差网络模块,利用多尺度卷积取代了传统的单尺度卷积,使得网络加宽以获取更多的特征信息,避免网络堆叠过深引起的过拟合现象;同时为了加快模型训练速度,采用深度可分离卷积代替传统卷积减少模型参数量;将注意力机制引入到残差网络中,增强了模型的关键特征信息的提取能力,从而提高了模型的识别精度。通过对试验数据集进行对比试验,改进网络模型的识别准确率达到99.48%并且模型参数量仅有19.06 MB,试验结果表明所提出的方法能有效地提高模型的识别性能并降低模型参数量,为实现低成本终端运行奠定基础。 相似文献
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在对煤矿瓦斯气体浓度的检测中,由于噪声、气体的吸收峰很窄、光源波长随温度的漂移等原因将引起测量的不稳定,通过采用对激光器的中心波长和气体吸收峰中心波长对准,测量光经过气体时的损耗就可以检测气体的浓度,利用一次谐波作为误差信号,可将光源精确地锁定在气体吸收峰上,并给出了窄带光源谐波检测的理论依据。实验结果表明,该方法可应用于甲烷气体浓度的光谱测量,它具有高精度、强选择性、快速响应等特点。 相似文献
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To reduce the cost, size and complexity, a consumer digital camera usually uses a single sensor overlaid with a color filter array(CFA) to sample one of the red-green-blue primary color values, and uses demosaicking algorithm to estimate the missing color values at each pixel. A novel image correlation and support vector machine(SVM) based edge-adaptive algorithm was proposed, which can reduce edge artifacts and false color artifacts, effectively. Firstly, image pixels were separated into edge region and smooth region with an edge detection algorithm. Then, a hybrid approach switching between a simple demosaicking algorithm on the smooth region and SVM based demosaicking algorithm on the edge region was performed. Image spatial and spectral correlations were employed to create middle planes for the interpolation. Experimental result shows that the proposed approach produced visually pleasing full-color result images and obtained higher CPSNR and smaller S-CIELAB*ab?E than other conventional demosaicking algorithms. 相似文献
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基于无线传感网络和GPRS的煤矿安全监测系统 总被引:2,自引:0,他引:2
文章在介绍了ZigBee和GPRS的同时,将无线网络技术和传感器技术结合,提出了一种分簇结构的ZigBee网络和GPRS网络相结合的煤矿安全远程监测系统的软件和硬件实现方法;实验结果表明,系统能够实现远程监控,具有重要的应用价值。 相似文献
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Adopted the distribution feedback type (DFB) laser to measure the coal mine gas methane, according to the methane located
1.6 μm nearby 2ν
3 with a R9 direct absorption spectrum, attraction wire intensity of each line was calculated through the multi-line Voigt
fitting. The experimental result indicates that in the obtained four attraction recover of wire, the maximum deviation is
2.7%, and the minimum deviation is 0.02%, other results are all in experimental error scope. This research method may apply
in the spectrum survey methane gas density, it has characteristics including high precision, strong selectivity, fast response
and so on.
Supported by the National Natural Science Foundation of China (50574005); Natural Science Foundation of Education Department
of Anhui, China (2005KJ081) 相似文献
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基于煤矿供电系统和电气设备的保护 总被引:2,自引:0,他引:2
简单叙述继电保护的原理,并对井下三大保护(过流保护、漏电保护、接地保护)及其它保护作了详细地论述,体现了供电系统和电气设备的保护对煤矿安全生产及其产量的提高具有重要意义。虽然继电保护的可靠性和灵敏度等都很高,但是它采用的触点控制方式,将会被软件控制方式所取代。最后,对煤矿供电系统和电气设备的保护方案作了展望。 相似文献
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简单介绍了智能超声波物位仪的工作原理,阐述了井下煤仓监控系统的组成、功能特点及其对井下工作环境的适应和安装要求,最后对可能的测量误差进行了分析。实践证明智能超声波物位仪在井下煤仓监控中的应用良好,具有推广价值。 相似文献