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Numerical Calculation of the Electromagnetic Vibration and Noise in Power Transformer Based on the Multi-Field Coupling Method 基于多场耦合法的电力变压器电磁振动与噪声数值计算
F. Han, Huan Wang, Xiuping Wang, Yongteng Jing
Aiming at the electromagnetic vibration and noise problem of power transformer body, the finite element analysis software ANSYS is used to establish the multi-field coupling calculation model including the electromagnetic field-structure field-sound field in power transformer, and the electromagnetic vibration and noise of power transformer body is numerically calculated and analyzed. Firstly, the magnetostrictive force of the core and the electromagnetic force of the winding are obtained through the electromagnetic field calculation. Then, it is applied to the structural field calculation model as an excitation to obtain the vibration displacement of the transformer body. Finally, the structure field calculation results are imported into the sound field calculation model, and the sound field distribution in the outer space of the transformer and the sound pressure value at the test point are obtained. By comparing with the test results, the effectiveness and accuracy of the method are proved. At the same time, the specific measures to reduce the vibration and noise of the transformer are given, which is of great significance to solve the vibration and noise problem of the transformer.
针对电力变压器本体电磁振动与噪声问题,利用有限元分析软件ANSYS建立了电力变压器内部电磁场-结构场-声场等多场耦合计算模型,对电力变压器本体电磁振动与噪声进行了数值计算与分析。首先,通过电磁场计算得到磁芯的磁致伸缩力和绕组的电磁力。然后,将其作为激励应用于结构场计算模型,得到变压器体的振动位移。最后将结构场计算结果导入到声场计算模型中,得到变压器外空间的声场分布和试验点处的声压值。通过与试验结果的比较,验证了该方法的有效性和准确性。同时,给出了降低变压器振动和噪声的具体措施,对解决变压器振动和噪声问题具有重要意义。
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引用次数: 0
The Application Research of Zabbix in Intelligent Network Information Center Zabbix在智能网络信息中心中的应用研究
Lisen Yue, Yongbin Bai, Haibo Liu, Z. Chen
With the continuous development of informatization, the network information center bears more and more heavy tasks, the maintenance pressure is increasing, for the management of a variety of hardware equipment and information system performance monitoring requirements are urgent. Zabbix as a distributed monitoring, control and management system, based on the mature distributed architecture design and development on market, can be all sorts the open source visual components, implementation of various monitoring data graphical display of mobile phones, state of early waring and analysis of the maintenance staff to have good support.
随着信息化的不断发展,网络信息中心承担的任务越来越重,维护压力越来越大,对于各种硬件设备的管理和信息系统性能监控的要求也越来越迫切。Zabbix作为一个分布式监控、控制和管理系统,基于市场上成熟的分布式架构设计开发,可以对各种开源可视化组件,实现各种监控数据在手机上的图形化显示,对维护人员的状态预警和分析有很好的支持。
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引用次数: 0
Research on road and bridge detection method in high resolution SAR image based on multi-feature fusion 基于多特征融合的高分辨率SAR图像路桥检测方法研究
J. Liu
Synthetic Aperture Radar (SAR) is a microwave remote sensing imaging radar that reduces interference from imaging constraints such as climate. It has all-weather, all-weather imaging characteristics, and can obtain rich information representing the physical properties of real objects on the surface. Widely used in the field of modern economic development. With the rapid development of modern urbanization, the types and numbers of supporting roads and bridges are constantly increasing, and they are constantly developing and changing every year. Therefore, it is very important to detect highway bridges with high-resolution SAR images that can cover a large area. Development is of great significance and has broad prospects for development. In this paper, the detection of roads and bridges in single-polarization high-resolution SAR images and the connection of global road networks are studied. The scattering characteristics of urban roads, bridges and nearby objects under the condition of single polarization SAR imaging are analyzed, and the effects of different environments and materials on the results of the target appearing on the image are studied. According to the inherent properties of the road and bridge targets and the imaging features in the SAR image, the multi-angle feature extraction of the target to be detected is further carried out, which lays the foundation for the subsequent road and bridge detection.
合成孔径雷达(SAR)是一种微波遥感成像雷达,它可以减少气候等成像限制因素的干扰。它具有全天候、全天候的成像特性,能够获得代表地表真实物体物理特性的丰富信息。广泛应用于现代经济发展领域。随着现代城市化的快速发展,配套道路桥梁的种类和数量不断增加,而且每年都在不断发展变化。因此,利用覆盖面积大的高分辨率SAR图像检测公路桥是非常重要的。发展意义重大,发展前景广阔。本文主要研究了单极化高分辨率SAR图像中道路和桥梁的检测以及全球道路网的连接。分析了单极化SAR成像条件下城市道路、桥梁及附近目标的散射特性,研究了不同环境和材料对目标在图像上出现结果的影响。根据路桥目标的固有属性和SAR图像中的成像特征,进一步对待检测目标进行多角度特征提取,为后续的路桥检测奠定基础。
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引用次数: 0
A method and application of precise haze traceability based on image recognition 基于图像识别的雾霾精确溯源方法及应用
Zeyu Zhou, Jinhao Chen, Hao Jiang
Haze affects the urban landscape, increases the cost of cleaning the city, and directly or indirectly causes respiratory diseases and affects the physical and mental health of citizens. In addition, the complex causes of haze, the difficulty of tracing the source leads to the current "wide net" type of treatment measures have limited effect, haze tracing work there are technical bottlenecks, poorly targeted treatment programs. Some economic and technological backwardness but also more serious pollution of the township, and even the use of "shock therapy" to manage the haze, although effective, but often cause economic decline. In this regard, the article proposes an accurate traceability method for haze, which achieves accurate traceability of haze through highly reductive haze collection, multi-angle morphological analysis and haze source database, and in addition applies remote sensing technology to obtain the real particle size parameters and temporal-spatial distribution of haze by inversion of AOD-PM2.5 mathematical model to check the obtained results from a macroscopic perspective, which ensures more The accuracy of the data is ensured. The results show that the pollution sources of typical haze in Xi'an are, in order of contribution, industrial coal combustion (35.1%), automobile exhaust (26.0%), industrial smelting (13.7%), soil sand (11.5%), and mineral extraction (1.9%). Among them, industrial coal combustion, automobile exhaust, and industrial smelting are the main sources of typical haze, with a combined contribution of more than 60%. To summarize the experience gained during the study, pollution prevention and control recommendations for industrial coal combustion, automobile exhaust and industrial smelting are proposed.
雾霾影响城市景观,增加城市清洁成本,并直接或间接引起呼吸系统疾病,影响市民身心健康。此外,雾霾成因复杂,溯源难度大,导致目前“宽网”式的治理措施效果有限,雾霾溯源工作存在技术瓶颈,治理方案针对性差。一些经济技术落后但污染也比较严重的乡镇,甚至采用“休克疗法”治理雾霾,虽然有效,但往往造成经济衰退。为此,本文提出了一种雾霾精确溯源方法,通过高度还原的雾霾采集、多角度形态分析和雾霾源数据库,实现对雾霾的精确溯源,并应用遥感技术,通过对AOD-PM2.5数学模型的反演,获取雾霾的真实粒径参数和时空分布,从宏观角度对所得结果进行检验。保证了数据的准确性。结果表明:西安市典型雾霾污染源的贡献率依次为工业燃煤(35.1%)、汽车尾气(26.0%)、工业冶炼(13.7%)、土壤砂(11.5%)、矿物开采(1.9%);其中,工业燃煤、汽车尾气、工业冶炼是典型雾霾的主要来源,合计贡献率超过60%。在总结研究经验的基础上,提出了工业燃煤、汽车尾气和工业冶炼的污染防治建议。
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引用次数: 0
Research on Auxiliary Training System of Computer Virtual Reality Technology in Track and Field Sprint Hurdles 田径短跑跨栏计算机虚拟现实技术辅助训练系统研究
Ye He
Track and field short span is the basis of many competitive sports and is a typical periodic movement. The high-speed swing ability of athlete's limbs is an important special ability. This study explores the quantitative detection method of mechanical sensors for short-span athletes' swing training, and establishes the relationship between the specific ability and mechanical parameters of the training process. The system realizes quantitative evaluation of athletic ability and real-time feedback of training effect. We initially created a "signal-feedback" approach to assisted training.
田径短跨距是众多竞技体育项目的基础,是典型的周期性运动。运动员四肢的高速摆动能力是一项重要的特殊能力。本研究探索了机械传感器对小跨距运动员挥拍训练的定量检测方法,建立了具体能力与训练过程机械参数之间的关系。该系统实现了运动能力的定量评价和训练效果的实时反馈。我们最初创建了一种“信号反馈”方法来辅助训练。
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引用次数: 0
Application of Compressive Sensing Technology and Image Processing in Space Exploration 压缩感知技术与图像处理在空间探测中的应用
Jiaming Jin
With the efforts of Terence Tao, David Donoho and many other scientists, using the prior knowledge of signal sparsity to obtain and reconstruct compressible signals has brought new vitality to information acquisition technology. The main advantage of compressive sensing technology over traditional Nyquist sampling law is that it can recover the original signal from fewer measurements. Naturally, compressive sensing technology can be innovatively used in a wide range of fields with its own advantages, such as space exploration, which is concerned in this paper: the measurement environment is more stringent, the original signal to noise ratio is lower, and the self-weight of detection equipment is more demanding. This paper will focus on the theory of compressive sensing, and discuss its application conditions and limitations. Finally, based on the theory, its application in multi-star imaging is discussed.
在Terence Tao、David Donoho等科学家的努力下,利用信号稀疏性的先验知识获取和重构可压缩信号,给信息获取技术带来了新的活力。与传统的奈奎斯特采样法相比,压缩感知技术的主要优点是它可以从更少的测量中恢复原始信号。自然,压缩感知技术凭借其自身的优势,可以创新地应用于广泛的领域,如本文所关注的空间探索:测量环境更加严格,原始信噪比更低,对探测设备的自重要求更高。本文将重点介绍压缩感知的理论,并讨论其应用条件和局限性。最后,在理论基础上讨论了其在多星成像中的应用。
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引用次数: 1
Research on Automatic Self-healing Control of Intelligent Feeder based on Multi-Agent Algorithm 基于多智能体算法的智能馈线自动自愈控制研究
Jiangang Lu, Ruifeng Zhao, Hai-cheng Liu, Wenxin Gou, Yong Zhao, Haiyong Wu, Hua Liu
The differential protection method applied to high voltage transmission network introduces fault location of intelligent distribution network, and the improved differential current method can realize fast and accurate location of intelligent distribution network. Aiming at the disadvantage that traditional feeder automation is not suitable for intelligent distribution network, an intelligent feeder automation model for intelligent distribution network based on multi-agent is constructed. An improved differential current method based on multi-agent is proposed for feeder fault location. This method can realize intelligent feeder automation and high precision and high speed fault location. The system network loss and node minimum voltage after fault recovery using Agent algorithm are the same as those of genetic algorithm, but the fault recovery time is obviously shortened. Agent can quickly operate the corresponding switch equipment remotely, and restore the load power supply in non-failure area, so that users can hardly feel the occurrence of power failure.
应用于高压输电网的差动保护方法引入了智能配电网的故障定位,改进的差动电流法可以实现智能配电网的快速准确定位。针对传统馈线自动化不适合智能配电网的缺点,构建了基于多智能体的智能配电网馈线自动化模型。提出了一种改进的基于多智能体的馈线故障定位差动电流法。该方法可实现智能给料机自动化和高精度、高速的故障定位。Agent算法故障恢复后的系统网络损耗和节点最小电压与遗传算法相同,但故障恢复时间明显缩短。Agent可以远程快速操作相应的开关设备,在非故障区域恢复负载供电,使用户几乎感觉不到停电的发生。
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引用次数: 0
House Price Prediction Model Using Bridge Memristors Recurrent Neural Network 基于桥式忆阻器递归神经网络的房价预测模型
Wenzhao Shi
In recent decay, the house price prediction plays important role because of it's the volatile of house price which makes significant impact on property valuation and economic growth. It characterizes are attracted the numerous researchers, businessman and people who buy or sell house towards it. The volatile of house price is occurred based on various factors like location, facility, neighborhood, etc. In this way, researchers are evaluating the factors using machine and deep learning process to analysis the information. Although, regression-based analysis has problem due to its nonlinear and linear information in neural network. Thus, we have proposed a novel Bridge Memristors Recurrent Neural Network to forecast the house price prediction in this paper. In addition, RBP algorithm is used on Bridge Memristors RNN for train the neural network in efficient manner. Besides, our proposed model carried out outstanding performance than existing models to attain the high prediction rate by analyzing the correlation coefficient.
在最近的衰退中,房价预测扮演着重要的角色,因为房价的波动性对房地产估值和经济增长产生重大影响。它的特点吸引了众多的研究人员、商人和买卖房屋的人。房价的波动是根据地理位置、设施、邻里等多种因素而发生的。通过这种方式,研究人员正在使用机器和深度学习过程来评估因素,以分析信息。然而,由于神经网络的非线性和线性信息,基于回归的分析存在问题。因此,本文提出了一种新的桥式忆阻器递归神经网络来预测房价。此外,将RBP算法应用于桥式忆阻器RNN,有效地训练神经网络。此外,通过对相关系数的分析,我们提出的模型在预测准确率方面比现有模型表现突出。
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引用次数: 0
Application of Advanced Operational Amplifiers in Biomedical Signal Systems 先进运算放大器在生物医学信号系统中的应用
Xin Huo, Zhihao Liu
With the usage of amplifiers worldwide, many industries are using them to process the signal. With different designs and different types of amplifiers, they contribute to those areas a lot. The same trends happen to medical areas as well. They use it to enhance the signal from their research. The advantages of operational amplifiers (op-amp) of adjustable bandwidth could positively affect the area, especially for its signal process research, involving EEG, ECG, EMG, PCG, and Aps usage. This article will focus on designs of advanced amplifiers, especially op-amp for medical equipment and mainly discuss the drawbacks and advantages that different designs could bring to the equipment. This paper will lead to three main questions: why to use an op-amp, how to design them, and the advantages and disadvantages of different kinds of designs.
随着放大器在世界范围内的使用,许多行业都在使用它们来处理信号。通过不同的设计和不同类型的放大器,它们为这些领域做出了很大贡献。同样的趋势也发生在医疗领域。他们用它来增强他们研究的信号。可调带宽运算放大器(运放)的优势可以对该领域产生积极的影响,特别是对其信号处理研究,涉及脑电图、心电、肌电、PCG和ap的使用。本文将重点介绍先进放大器的设计,特别是医疗设备的运放,主要讨论不同设计可能给设备带来的缺点和优点。本文将引出三个主要问题:为什么要使用运放,如何设计运放,以及不同设计的优缺点。
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引用次数: 0
Prediction of Credit Risk based on Logistic Regression and Random Forest technique 基于Logistic回归和随机森林技术的信用风险预测
Xin Yang
With the increasing demand of bank loan businesses, the probability of non-performing loans, that is, loan default, has also increased sharply. We design machine learning algorithm to solve the problem, which can reduce the loan risk and improve service efficiency, especially when we face the data unbalanced issues. Firstly, we train the random forest model with the historical bank loan data and associated data from other financial institutions. Secondly, we revised the unbalanced data classification algorithm with random forest and tuned the data feature extraction methods. Thirdly, the results show that the machine learning risk predication algorithm outperforms traditional statistical algorithms. In addition, we use random forest algorithm to identify the impact of data feature, it is possible to obtain features that have a huge impact on the definition of the results, allowing for more accurate loan risk assessment in the financial sector.
随着银行贷款业务需求的增加,不良贷款即贷款违约的概率也急剧增加。我们设计了机器学习算法来解决这个问题,可以降低贷款风险,提高服务效率,特别是当我们面临数据不平衡的问题时。首先,我们使用历史银行贷款数据和其他金融机构的相关数据来训练随机森林模型。其次,对基于随机森林的不平衡数据分类算法进行了改进,并对数据特征提取方法进行了优化。第三,机器学习风险预测算法优于传统的统计算法。此外,我们使用随机森林算法来识别影响数据的特征,有可能获得对结果定义有巨大影响的特征,从而可以更准确地评估金融部门的贷款风险。
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引用次数: 0
期刊
Proceedings of the 7th International Conference on Cyber Security and Information Engineering
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