ID 原文 译文
15345 接着通过动态的盲源分离技术将传感器接收到的混合信号分解成相互独立的成分,最后对分离的故障信号进行EMD分解,并得到多个基本模式分量函数(Intrinsic Mode Function, IMF)的分布结果。 Because of the blind identification characteristics for random noise with fourth-order statistics, the stationary random noise of rolling bearing in normal operation works as a kind of conventional signal input. Then, the mixed signals received by the sensor are decomposed into independent components by dynamic blind source separation technology. Finally, the separated fault signals are decomposed by EMD, and the distribution results of several basic mode component functions( IMF) are obtained.
15346 仿真研究表明,该方法可以对带有故障的滚动轴承进行有效的诊断,特别是在背景噪声较强的多轴承传动系统中,能够有效避免多种故障信号之间的相互干扰,相对于传统的单一直接检测方法而言,可以进一步提高对故障轴承分析的准确性。 Simulation results show that the method can effectively diagnose the rolling bearing with faults. Especially in the multi bearing drive system, it can effectively avoid the mutual interference between various fault sig-nals. Compared with the traditional single direct detection method, it can further improve the accuracy of fault bearing analysis.
15347 针对目前智能安防系统低成本、便捷的应用需求,为提高RFID在实际应用中既要方便易实现又要安全、稳定的性能,设计了一种基于RFID二次认证加密的智能识别系统。 According to the low cost and convenient application demand of current intelligent security system, a novel identification system is designed in order to improve the convenience and stability of RFID in practical application based on RFID secondary au-thentication and encryption.
15348 该系统主要是基于MIFARE-S50卡的密钥存储分区和任意一个数据分区,借助哈希码算法的不可逆性,结合UID(User Identification)完成智能识别系统的密钥认证实现。 The system is primarily come out of the key storage partition of MIFARE-S50 and any data partition,used the irreversibility of hash code algorithm, and UID is used as the authentication part in the key of intelligent recognition sys-tem.
15349 只有当数据和UID同时通过系统两次认证后,系统才能识别智能卡,从而做出相关识别动作,同时可有效识别并阻止复制卡认证。 Only when the data and UID are authenticated twice by the system, then the smart card can be recognized and made relevant identification actions.
15350 该系统支持3种工作模式：注册模式、工作模式、注销模式,可有效地确保用户的隐私和信息安全。 At the same time, if system encounter a copy card, it can effectively identify and prevent the authentication.The system supports three working modes that are the registration mode, operating mode and logout mode, which can effectively en-sure the privacy and information security of users.
15351 经实验测试结果表明,该系统安全性高、稳定好、方便易操作,具有较高的应用和实践价值,可应用于学校、小区、公司等中型RFID智慧安防系统中限制非法人员的入侵。 Actual experimental results show that the system has high security, good stability,and is convenient and easy to operate. And it has high application and practical value, and can be used in schools, communities,companies and other medium-sized RFID intelligent security systems to limit the invasion of illegal personnel.
15352 受水介质对光线的散折射及吸收作用、光照条件变化和成像距离等因素影响,水下图像中往往存在对比度低、模糊严重等问题。 Under the influence of dispersive refraction and absorption of light caused by water medium, variation of illumination condition, and imaging distance, there are always some problems such as low contrast and serious blur devaluing the underwater image.
15353 针对上述问题,结合学者们在水下图像质量提升方面的研究,以3个水下图像集为对象,选取了9种不同的图像质量提升方法(包括增强和复原方法)进行水下图像对比实验,并从耗时、峰值信噪比、结构相似度、平均梯度、熵值和标准差6方面对实验结果进行分析,得到不同方法之间的优劣情况。 Aiming at above problems, based on some researches which improving image quality, this paper chooses three different of underwater image datasets as targets and nine image quality improvement methods( which contains image enhancement and image restoration methods) to carry out the underwater comparative experiments, while analyzing the experimental results from six separate aspects such as time-consuming, peak signal to noise ratio, structural similarity measure, average gradient, entropy, and standard deviation.
15354 其中直方图均衡化和引导滤波的实验结果图像效果最佳,且获得了整体较好的数据结果,这为后续研究提供了方向。 Experimental results shows that Histogram Equalization and Guided Filter performed the best according to the processed images, and achieved relatively satisfactory data results on the whole, which was believed to laid a basic foundation for further study.