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沥青路面检测技术正在由静态检测向动态检测、手工操作方式向自动化方式、有损检测向无损检测、单项检测向集成检测的方向发展。本文作者结合自己近几年在沥青路面检测方面的管理经验,综合介绍了沥青路面弯沉检测、路面平整度检测、抗滑性能检测和路面厚度检测的新技术。 相似文献
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《中国新技术新产品》2020,(8)
该文基于对道路桥梁检测中无损检测技术应用的研究,首先阐述了无损检测技术应用,说明了其具有无破坏性优势、完善的技术体系优势。然后分析了道路桥梁无损检测方法,包括机敏混凝土检测方式、电化学检测方式等。最后介绍了道路桥梁检测中无损检测技术的应用,包括传感检测技术的应用、超声波检测技术的应用、探底雷达检测技术的应用以及图像检测技术的应用等。 相似文献
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针对光电编码器检测中存在的问题研制出了相应的检测装置,并阐述了检测方法。该检测装置的特点在于:体积小,操作方便,检测快捷,检测结果数码管显示。检测装置能完成所有的检测项目,能够达到光电编码器快速、全面、精确检测的要求。 相似文献
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声相关计程仪(Acoustic Correlation Log,ACL)检测技术用于对ACL在陆上进行功能检测。阐述了检测技术原理、检测方案以及检测平台的设计与实现。采用声呐阵对接检测的方案,可以连续对ACL完成一系列的检测。为了对70k Hz ACL进行功能检测,使用快速多通道并行的A/D、D/A模块,基于运行在PXI控制器的WINDOWS平台,开发了微软基础类库(Microsoft Foundation Classes,MFC)框架下的检测软件,搭建了完整有效的可视化检测平台。该检测平台可以完成对70 k Hz ACL的在载体功能检测,包括发射通道检测、接收通道检测以及串口输出检测等主要功能检测。检测平台使用便捷,性能稳健。经实验室测试证明,检测方案具备可行性,检测平台具有实用性。 相似文献
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《中国新技术新产品》2020,(13)
水质检测是确定水体是否清洁、适宜灌溉、饮用以及需要污水处理的前提条件,检测结果的准确性和可靠性非常重要。因此该文就某水质检测项目检测结果的质量控制进行研究,分析水质检测质量控制注意事项,做好水质检测准备,选择合适的水质检测方法,制定水质检测制度,重视水质检测质量审核,以提升水质检测工作的精准度,提高检测结果的可靠性。 相似文献
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微流控芯片检测技术进展 总被引:3,自引:0,他引:3
对近年来用于微流控芯片的光学检测(包括荧光、吸收光度和电化学发光检测等)、电化学检测(电导检测、电位检测及安培检测)的发展和其他一些检测方法的研究成果进行了综述,随着微加工技术的不断发展,高速多通道检测以及集成多种方法的高通用性微流控检测芯片都将成为未来的研究热点。 相似文献
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Outlier detection is a key research area in data mining technologies, as outlier detection can identify data inconsistent within a data set. Outlier detection aims to find an abnormal data size from a large data size and has been applied in many fields including fraud detection, network intrusion detection, disaster prediction, medical diagnosis, public security, and image processing. While outlier detection has been widely applied in real systems, its effectiveness is challenged by higher dimensions and redundant data attributes, leading to detection errors and complicated calculations. The prevalence of mixed data is a current issue for outlier detection algorithms. An outlier detection method of mixed data based on neighborhood combinatorial entropy is studied to improve outlier detection performance by reducing data dimension using an attribute reduction algorithm. The significance of attributes is determined, and fewer influencing attributes are removed based on neighborhood combinatorial entropy. Outlier detection is conducted using the algorithm of local outlier factor. The proposed outlier detection method can be applied effectively in numerical and mixed multidimensional data using neighborhood combinatorial entropy. In the experimental part of this paper, we give a comparison on outlier detection before and after attribute reduction. In a comparative analysis, we give results of the enhanced outlier detection accuracy by removing the fewer influencing attributes in numerical and mixed multidimensional data. 相似文献
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分区域分等级的印刷品缺陷检测方法 总被引:4,自引:4,他引:0
目的为了体现印刷品不同区域的重要性等级,提高印刷品缺陷检测的精度,提出了一种分区域分等级的印刷品缺陷检测方法。方法根据检测区域的特点和重要性不同,把印刷品分成不同的区域进行前景提取,并且设置不同的检测等级;对印刷品进行符合人眼视觉特性的缺陷识别,并对提取缺陷进行特征分析。结果分区域的缺陷检测可以实现不同区域的同时检测,在检测耗时、检测准确率及误检率上都优于不分区域的检测方法。结论基于分区域的印刷品缺陷检测方法能很好地满足印刷品质量检测的需求,提高印刷品缺陷检测的精度和效率。 相似文献
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Detection of unknown attacks like a zero-day attack is a research field that has long been studied. Recently, advances in Machine Learning (ML) and Artificial Intelligence (AI) have led to the emergence of many kinds of attack-generation tools developed using these technologies to evade detection skillfully. Anomaly detection and misuse detection are the most commonly used techniques for detecting intrusion by unknown attacks. Although anomaly detection is adequate for detecting unknown attacks, its disadvantage is the possibility of high false alarms. Misuse detection has low false alarms; its limitation is that it can detect only known attacks. To overcome such limitations, many researchers have proposed a hybrid intrusion detection that integrates these two detection techniques. This method can overcome the limitations of conventional methods and works better in detecting unknown attacks. However, this method does not accurately classify attacks like similar to normal or known attacks. Therefore, we proposed a hybrid intrusion detection to detect unknown attacks similar to normal and known attacks. In anomaly detection, the model was designed to perform normal detection using Fuzzy c-means (FCM) and identify attacks hidden in normal predicted data using relabeling. In misuse detection, the model was designed to detect previously known attacks using Classification and Regression Trees (CART) and apply Isolation Forest (iForest) to classify unknown attacks hidden in known attacks. As an experiment result, the application of relabeling improved attack detection accuracy in anomaly detection by approximately 11% and enhanced the performance of unknown attack detection in misuse detection by approximately 10%. 相似文献
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包装印刷品条码质量检测方法 总被引:3,自引:3,他引:0
目的为保证商品条码在物流系统中的快速识别和信息传递,研究条码的质量检测方法。方法首先分出条码区域,考虑到条码的特殊属性,需要满足其可识读功能,设计针对EAN-13商品条码的印制质量检测方法,包括可识读检测和印刷缺陷检测。根据条码检测的国家标准,条码可识读检测部分,采用扫描反射率曲线分析法和条码质量分级法对条码的可识读性进行判定。条码缺陷检测部分经过条码校正、条码与字符的分割和条码大小的归一化等处理后,选定基于垂直投影的缺陷检测算法对条码的脱墨和污点缺陷进行检测。结果条码识读程序对合格品和缺陷品的识读准确率都为100%,条码缺陷检测算法程序的平均检测耗时为93.35 ms,检测准确率为94%。结论条码质量检测系统具有较高的检测准确率,并且能够很好地满足机器视觉缺陷检测速度的要求。 相似文献
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In cognitive Internet of Things (C-IoT), spectrum detection aims to find the available spectrum resources for cognitive sensor nodes. However, it always consumes more energy to get higher detection rate in spectrum detection, so energy consumption and detection rate are positively correlated in C-IoT. Different from the available algorithms, we model spectrum detection in C-IoT as a multi-objective optimization problem and aim to find the trade-off points of spectrum detection. An artificial physics optimization algorithm is proposed to solve spectrum detection problems in C-IoT. The simulation results show that the proposed algorithm can effectively reduce the energy consumption and keep a high detection rate. 相似文献