排序方式: 共有95条查询结果,搜索用时 31 毫秒
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This work deals with quantitative analysis of multicomponent mud logging gas based on infrared spectra. An accurate analysis method is proposed by combining a genetic algorithm (GA) and a radial basis function neural network (RBFNN). The GA is used to screen the infrared spectrum of the mixed gas, while the selected spectral region is used as the input of the RBFNN to establish a calibration model to quantitatively analyze the components of logging gas. The analysis results demonstrate that the proposed GA-RBFNN performs better than FS-RBFNN and ES-RBFNN, and our proposed method is feasible. 相似文献
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在车架号管理系统中,车架号的获取目前还主要通过人工拓印来完成。这种方法提取速度慢、人员操作不方便、消耗大量人力,在车辆众多的情况下,花费时间太长,严重影响办公效率。针对这种情况,介绍了一种新的车架号采集方法,该方法利用计算机图像识别技术和机器视觉检测技术从图片中定位并恢复出原始车架号信息,与拓印方法相比,不仅可节省时间,提高办公效率,而且易于实现车架号的数字化和网络化管理。经天津车管所的样机试验和使用,效果良好。 相似文献
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AD9901是美国ADI公司生产折超高速鉴相器,可处理高达200MHZ信号,既具备模拟混顿器的相位稳定性,也具有传统鉴相器内的锁定速度。本文详细地介绍了它的工作原理,性能及其应用。 相似文献
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针对目前图像拼接中计算量大、精度低两大难题,本算法应用高精度伺服控制平台、边缘信息阈值分割和模板匹配图像处理方法,实现了PCB图像的快速拼接。由于高精度伺服控制平台的引入,使得图像重合区域的参数获取变得容易。实验表明:应用伺服控制平台以后,提高了算法的实时性,达到较高的精度。 相似文献
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To quickly obtain accurate 3D data of dental cast model, this paper proposes a 3D reconstruction method for dental cast model based on structured light. This method combines the structured light with the motor turntable to obtain a group of 3D data for the dental cast model from multiple angles, and automatically registers the dental 3D data from multiple angles through the ball calibration of turntable. Compared with the real data of the dental cast model, the maximum error of the 3D reconstruction results in this paper is 0.115 mm. The reconstruction time of this process is about 130 s. The experimental results show that the method has high precision and high scanning speed for the 3D reconstruction of the dental cast model. 相似文献
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