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2021 3rd International Conference on Intelligent Control, Measurement and Signal Processing and Intelligent Oil Field (ICMSP)最新文献

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Study on Quantitative Evaluation Standard of Fault Sealing Ability of Underground Gas Storage in Jizhong Depression 冀中坳陷地下储气库断层封闭能力定量评价标准研究
Lv Meilin
In the Beijing-Tianjin-Hebei region, there is a huge gap in the capacity of natural gas peak regulation. Due to the influence of fault development and complex structure in Jizhong Depression, the evaluation of fault sealing ability is the top priority in the feasibility study of reservoir construction, but it lacks theoretical support and evaluation criteria. In this study, by calculating the shale gouge ratio, fault plane normal pressure, fault activity rate and fault growth index of the main fault in the gas-bearing structure of Jizzhong depression, to explore the quantitative characterization of fault sealing property value and the correlation of oil reservior, gas reservoir and aquifer. Then the parameter boundary of fault sealing ability is established, and the quantitative evaluation standard of fault sealing ability of gas storage is obtained. It provides theoretical support and practical guidance for the selection and evaluation of new gas storage sites in Jizhong depression.
在京津冀地区,天然气调峰能力存在巨大缺口。冀中坳陷受断裂发育和构造复杂的影响,在储层建设可行性研究中,断层封闭能力评价是重中之重,但缺乏理论支持和评价标准。本研究通过计算冀中坳陷含气构造中主要断层的泥泥比、断面法向压力、断层活动性和断层生长指数,探讨断层封闭性值的定量表征以及油气储层与含水层的相关性。建立了断层封闭能力的参数边界,得到了储气库断层封闭能力的定量评价标准。为冀中坳陷新建储气库选址和评价提供了理论支持和实践指导。
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引用次数: 0
An optimized three-dimensional positioning algorithm for rssi-based wireless sensor network 基于rsi的无线传感器网络三维定位优化算法
Yuxuan Xie
For the application of sensor networks in three-dimensional space, the main method of data transmission is to transmit data by finding spatial coordinate positions, Node localization is one of the key factors of wireless sensor networks. Based on the traditional RSSI algorithm, this paper presents an improved centroid location algorithm with higher accuracy. In the three-dimensional space, the problem of finding the coordinates of unknown nodes is based on the quadrilateral measurement method. The distance between the four known anchor nodes and the unknown node is first measured, and then a rough solution is obtained by centroid positioning, and finally the more accurate node can be obtained by the Newton iteration method. The improved algorithm is more suitable for the use of three-dimensional space, and has better positioning accuracy than the traditional RSSI algorithm.
对于传感器网络在三维空间中的应用,数据传输的主要方法是通过寻找空间坐标位置来传输数据,节点定位是无线传感器网络的关键因素之一。本文在传统RSSI算法的基础上,提出了一种精度更高的质心定位改进算法。在三维空间中,寻找未知节点坐标的问题是基于四边形测量方法的。首先测量4个已知锚节点与未知节点之间的距离,然后通过质心定位得到粗糙解,最后通过牛顿迭代法得到更精确的节点。改进后的算法更适合于三维空间的利用,并且比传统的RSSI算法具有更好的定位精度。
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引用次数: 1
Research on Location Method Based on GNSS/IMU/LIDAR Multi-source Information Fusion 基于GNSS/IMU/LIDAR多源信息融合的定位方法研究
Tang Jingman, Zhang Yali, Li Anran
In recent years, unmanned mobile platforms have been applied more and more widely in various fields of society, and the market has a strong actual demand for consumer navigation and positioning system. In this paper, a localization algorithm based on GNSS/IMU integrated navigation system combined with Lidar odometer is proposed. Graph optimization is used for multisensor data fusion. Experiments show the excellent performance of the algorithm.
近年来,无人驾驶移动平台在社会各个领域的应用越来越广泛,市场对消费类导航定位系统有着强烈的实际需求。提出了一种基于GNSS/IMU组合导航系统与激光雷达里程计相结合的定位算法。多传感器数据融合采用图优化方法。实验证明了该算法的优良性能。
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引用次数: 1
Double closed-loop control of converter based on active disturbance rejection 基于自抗扰的变换器双闭环控制
Hongyi Peng, Ruoyan Pan, Zhimin Zhang, Zhen Li, X. Zhu, Zhenxiong Zhou
To overcome the disadvantages of complex control, poor robustness and unstable output voltage of traditional doubly-fed induction generator grid-side converter, a double closed-loop control system of DC bus voltage outer loop based on active disturbance rejection control (ADRC) and current inner loop based on PID is designed. By controlling the output current of the converter, the purpose of maintaining the constant DC bus voltage of the PWM converter on the grid-side and keeping the output unit power factor of the stator side is achieved. Not only can good control effect be achieved, but also the hardware complexity of the system can be reduced and the utilization efficiency of the doubly-fed induction generator can be improved. The simulation results show that the double closed-loop control strategy can effectively maintain the DC bus voltage stability of the grid-side converter, ensure that the DC voltage fluctuation is small, reduce the voltage distortion rate, and have a strong anti-interference ability.
针对传统双馈感应发电机并网变换器控制复杂、鲁棒性差、输出电压不稳定等缺点,设计了一种基于自抗扰控制(ADRC)的直流母线电压外环和基于PID的电流内环的双闭环控制系统。通过控制变换器的输出电流,达到保持电网侧PWM变换器直流母线电压恒定,同时保持定子侧输出单元功率因数不变的目的。不仅可以达到良好的控制效果,而且可以降低系统的硬件复杂度,提高双馈感应发电机的利用效率。仿真结果表明,双闭环控制策略能有效保持电网侧变流器直流母线电压稳定,保证直流电压波动小,降低电压畸变率,具有较强的抗干扰能力。
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引用次数: 0
Secrecy Probability of a NOMA based FSO-RF Network with Amplify-and-Forward Relaying 基于NOMA的放大转发FSO-RF网络的保密概率
Y. Zhuang, Jiliang Zhang
In this paper, the secrecy performance from the perspective of secrecy outage probability(SOP) for a free space optical-radio frequency (FSO-RF) network with an amplify-and-forward (AF) relaying under the wiretapping of an eavesdropper is investigated. Specifically, a superimposed signal of two users is first transmitted from a source (S) to a relay (R) over an FSO link, and then converted by R into an electrical one and broadcasted to their corresponding users over the RF links, while an eavesdropper is overhearing this transmission. In addition, the information transmission in both hops is incorporated with a non-orthogonal multiple access technique. Assuming the FSO and the RF links undergo Gamma-Gamma fading and Nakagami-$m$ fading respectively, the analytical expression for SOP is first obtained and then verified with simulation results.
本文从保密中断概率(SOP)的角度,研究了窃听者窃听下具有放大转发中继的自由空间光射频(FSO-RF)网络的保密性能。具体来说,两个用户的叠加信号首先通过FSO链路从源(S)传输到中继(R),然后由R转换为电信号,并通过RF链路广播给相应的用户,而窃听者正在偷听这种传输。此外,两跳的信息传输采用了非正交多址技术。假设FSO链路和RF链路分别经历Gamma-Gamma衰落和Nakagami-$m$衰落,首先得到SOP的解析表达式,然后用仿真结果进行验证。
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引用次数: 1
Research and Analysis of Image Enhancement Algorithm in the Classification of Rock Thin Section Images 岩石薄片图像分类中图像增强算法的研究与分析
Yang Huaizhou, Xu Danyang
The structure of rock flakes is complex and difficult to be classified accurately. The proposed method to solve the problem is to use an image enhancement algorithm to enhance the rock slice image. In the study, the neural network ResNet50, which has a significant effect on fine-grained classification, was used to construct the rock cast thin section image classifier, and three image enhancement algorithms, CutOut, MixUp, and CutMix, were used to enhance the rock thin section image. The rock slice images used in the data set are from Ordos, and are divided into five categories according to the size of the rock. The experimental result obtained was that the CutOut algorithm performs well on the data set, and the accuracy of the classifier was as high as 93.39%, which is 1.3% higher than the result of only using ResNet50 for classification. The experimental results show the effectiveness of the image enhancement algorithm in the classification of rock slice images.
岩片结构复杂,难以准确分类。本文提出的解决方法是利用图像增强算法对岩石切片图像进行增强。本研究采用对细粒度分类效果显著的神经网络ResNet50构建岩石浇铸薄片图像分类器,并采用CutOut、MixUp和CutMix三种图像增强算法对岩石薄片图像进行增强。数据集中使用的岩石切片图像来自鄂尔多斯,并根据岩石的大小分为五类。实验结果表明,cut - out算法在数据集上表现良好,分类器准确率高达93.39%,比仅使用ResNet50进行分类的结果提高了1.3%。实验结果表明了图像增强算法在岩石切片图像分类中的有效性。
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引用次数: 2
Optimized design of flaw detection method based on pulsed eddy current testing 基于脉冲涡流检测的探伤方法优化设计
Xianwei Wu, Yifan Chen, Jialing Huang, Xue Li, Chenke Yin, Yang Hong, Xin-tao Dai, Zhenghua Xu
Eddy current testing technology is widely used in traffic safety, and different excitation sources will affect the amount of information and test results of a single test result. According to the characteristics of square waves containing multiple harmonics, using pulse eddy current detection, based on the analysis of the working principle of pulsed eddy current detection, the 60 kg/m I-shaped rail is used as the object, and the model is established using ANSYS. The simulation compares the advantages and disadvantages of traditional eddy current testing and pulsed eddy current testing at the same damage depth, analyzes the effect of pulse excitation duty cycle on detection sensitivity, and uses curve fitting to optimize the design of the excitation source duty cycle. The results show that: 1) Compared with traditional eddy current testing, pulsed eddy current testing has a larger magnetic induction line coverage area and deeper sinking depth near the rail damage, so the information amount of a single detection is more abundant; 2) The impact of the excitation duty cycle on the sensitivity of defect detection is related to the depth of damage; 3) The detection sensitivity is optimal when the duty cycle is 20%, and the peak voltage of the receiving coil is 1.72V at this time.
涡流检测技术广泛应用于交通安全领域,不同的励磁源会影响单个检测结果的信息量和检测结果。根据含有多次谐波的方波的特点,采用脉冲涡流检测,在分析脉冲涡流检测工作原理的基础上,以60 kg/m的工字钢轨为对象,利用ANSYS建立模型。仿真比较了相同损伤深度下传统涡流检测与脉冲涡流检测的优缺点,分析了脉冲激励占空比对检测灵敏度的影响,并采用曲线拟合的方法对激励源占空比进行优化设计。结果表明:1)与传统涡流检测相比,脉冲涡流检测磁感应线覆盖面积更大,轨损附近下沉深度更深,单次检测信息量更丰富;2)激励占空比对缺陷检测灵敏度的影响与损伤深度有关;3)占空比为20%时检测灵敏度最佳,此时接收线圈的峰值电压为1.72V。
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引用次数: 0
Study of Receptive Spot Delivery Routing Problem based on Adaptive Large-scale Neighbor Search Algorithm 基于自适应大规模邻居搜索算法的接收点投递路由问题研究
Haoyang Li
With the frequent occurrence of natural disasters in recent years, emergency logistics and transportation have great significance. The optimization of the vehicle delivery route after disasters is a problem limited by capacity, time window, and cost. We construct a multi-objective model that considers the time window penalty cost to minimize the total costs and maximize the average satisfaction of the disaster sites during the delivery process. Then, we transfer the proposed multi-objective model to a single objective model. Last, an adaptive large neighborhood search (ALNS) algorithm is presented to solve this problem and the experimental results show that the algorithm achieves a high-quality solution on large-scale instances.
随着近年来自然灾害的频繁发生,应急物流运输具有重要意义。灾后车辆配送路线的优化是一个受能力、时间窗口和成本限制的问题。构建了一个考虑时间窗惩罚成本的多目标模型,以使交付过程中总成本最小化,使灾难现场的平均满意度最大化。然后,我们将提出的多目标模型转化为单目标模型。最后,提出了一种自适应大邻域搜索(ALNS)算法来解决这一问题,实验结果表明,该算法在大规模实例上获得了高质量的解。
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引用次数: 0
Study on series voltage equalizing method of IGBT in high voltage circuits 高压电路中IGBT串联电压均衡方法研究
Jiahui Yang, Ke Cao, Hong Li
In this paper, a gate $RC-mathrm{D}$ voltage equalizer circuit is studied. The purpose of this circuit is to solve the problem that the emitter voltage distribution of each component set is uneven when IGBT runs in series. The working principle of gate $RC-mathrm{D}$ voltage equalizer is described, and the functions of all components in the voltage equalizer are analyzed under different switching states of IGBT. Finally, a series voltage equalizer circuit model of IGBT is built on PSPICE platform for simulation. By comparing the simulation results of voltage equalizing circuit with or without voltage equalizing circuit, a good voltage equalizing effect is obtained after simulating voltage imbalance under 4000V DC voltage. It provides a guarantee condition for the stable operation of IGBT in series, thus verifying the feasibility of the scheme.
本文研究了一种栅极RC-数学{D}$电压均衡器电路。该电路的目的是为了解决IGBT串联运行时各组件的发射极电压分布不均匀的问题。介绍了栅极RC- maththrm {D}$电压均衡器的工作原理,分析了IGBT在不同开关状态下各器件的作用。最后,在PSPICE平台上建立了IGBT串联电压均衡电路模型,并进行了仿真。通过对比有电压均衡电路和没有电压均衡电路的电压均衡电路的仿真结果,在4000V直流电压下模拟电压不平衡,获得了良好的电压均衡效果。为IGBT串联稳定运行提供了保障条件,验证了方案的可行性。
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引用次数: 0
Metering Clock Enhancement Technology and New Service Applications Based on 5G Timing 基于5G授时的计量时钟增强技术及新业务应用
Wu Shaocheng, Ma Yue, Wang Bo, Chen Xiaowei, You Zilin, Huang Shukai, Huang Zhiyuan
With the emergence of digital grid concept, the current metering system using PTP (Precise Time Protocol) clock synchronization technology cannot provide a unified device clock system across entire network, which affects two-way real-time control of new energy. And it is difficult to meet the clock for new business transactions synchronization accuracy requirements. Under the original metering clock system, a multi-source clock weighted fusion technology was proposed that used 5G communication modules as reference clocks, and used Kalman filtering to complete step-by-step clock correction at all levels of network nodes to achieve coordinated correction of different external reference clocks. The highest clock synchronization accuracy ensure the consistency of real-time data collection clock. Based on field test data collected by the Shenzhen Power Supply Bureau, the results showed that the electricity bill settlement after clock synchronization optimization processing is closer to field settlement.
随着数字电网概念的出现,目前采用PTP (Precise Time Protocol,精确时间协议)时钟同步技术的计量系统无法提供全网统一的设备时钟系统,影响了新能源的双向实时控制。并且很难满足时钟对于新业务事务同步精度的要求。在原有计量时钟系统的基础上,提出了以5G通信模块作为参考时钟的多源时钟加权融合技术,利用卡尔曼滤波完成各级网络节点的分步时钟校正,实现不同外部参考时钟的协同校正。时钟同步精度高,保证实时数据采集时钟的一致性。基于深圳市供电局采集的现场测试数据,结果表明,时钟同步优化处理后的电费结算更接近现场结算。
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引用次数: 0
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2021 3rd International Conference on Intelligent Control, Measurement and Signal Processing and Intelligent Oil Field (ICMSP)
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