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In situ detection of soil moisture content based on thermal infrared technology and thermal inertia model 基于热红外技术和热惯性模型的土壤含水量原位检测
Pub Date : 2022-06-30 DOI: 10.1117/12.2639165
Wenjun Shang, Caixia Wang
Our country is a developing country dominated by agriculture, and the trade of agricultural and sideline products accounts for a considerable proportion in China's national economy. Soil moisture content is one of the basic parameters reflecting soil fertility and crop growth in agricultural production activities. The detection of soil moisture content plays an extremely important role in improving soil utilization and increasing crop yield. At the same time, thermal infrared technology has the characteristics of wide acquisition range, high acquisition accuracy, fast information transmission speed and less affected by interference factors. It provides a new method for in-situ detection of soil moisture. In this paper, infrared thermal imaging technology is used to detect the soil in the measured area in situ, which not only avoids the influence of traditional drying method on the sample in the sampling process, but also improves the detection accuracy. The combination of thermal imaging technology and thermal inertia model makes it suitable for the detection of soil moisture content under most environmental conditions, including bare soil, sandy land and low vegetation coverage.
我国是一个以农业为主的发展中国家,农副产品贸易在中国国民经济中占有相当大的比重。土壤水分是农业生产活动中反映土壤肥力和作物生长的基本参数之一。土壤水分含量的检测对提高土壤利用率、提高作物产量具有极其重要的作用。同时,热红外技术具有采集范围宽、采集精度高、信息传输速度快、受干扰因素影响小等特点。为土壤水分的原位检测提供了一种新的方法。本文采用红外热成像技术对被测区域的土壤进行原位检测,既避免了传统干燥方法在采样过程中对样品的影响,又提高了检测精度。热成像技术与热惯性模型相结合,适用于大多数环境条件下的土壤含水量检测,包括裸露土壤、沙地和低植被覆盖度。
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引用次数: 0
Secure sharing method of network data transmission based on multi-layer encryption algorithm 基于多层加密算法的网络数据传输安全共享方法
Pub Date : 2022-06-30 DOI: 10.1117/12.2639364
Ya-Tao Jing, Wenqian Zhang, Lin Ge, Nanfang Li, Xiyuan Shang, Yun Ye
In network data transmission, the data to be encrypted is not always at the same level. The access structure is embedded in the ciphertext, resulting in excessive communication and computing overhead. Therefore, a secure sharing method of network data transmission is proposed based on multi-layer encryption algorithm. According to the relationship between users, type servers and service providers, the logical structure of data transmission is established, and the data sharing contract is called on the basis of secure communication. By designing the key synchronization mechanism, both sides of the transmission can use the same key for encryption and decryption to ensure the forward security of the data. The key distribution scheme is established based on multi-layer encryption algorithm. The ciphertext information of the next layer is directly embedded in the ciphertext of the previous layer, which realizes the jump transmission of ciphertext and ensures the security of data privacy. In the final stage, both the master node and the slave node will receive the confirmation information, and then check the signature of the confirmation information to complete the secure sharing of data transmission. The test results show that this method reduces the communication overhead and computing overhead, and improves the efficiency of encryption and decryption.
在网络数据传输中,需要加密的数据并不总是在同一层。访问结构嵌入在密文中,导致通信和计算开销过大。为此,提出了一种基于多层加密算法的网络数据传输安全共享方法。根据用户、类型服务器和服务提供商之间的关系,建立数据传输的逻辑结构,在安全通信的基础上调用数据共享契约。通过设计密钥同步机制,传输双方可以使用同一密钥进行加解密,保证数据的前向安全。建立了基于多层加密算法的密钥分配方案。下一层的密文信息直接嵌入到前一层的密文中,实现了密文的跳转传输,保证了数据隐私的安全性。在最后阶段,主节点和从节点都会收到确认信息,然后检查确认信息的签名,完成数据传输的安全共享。测试结果表明,该方法降低了通信开销和计算开销,提高了加解密效率。
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引用次数: 0
Discussion on computer network video conference system and principle 浅谈计算机网络视频会议系统及其原理
Pub Date : 2022-06-30 DOI: 10.1117/12.2639306
Bolei Tong
With the increasing development of the market economy, interpersonal communication has become increasingly frequent. With the continuous advancement of science and technology, communication methods have been increasingly developed. Computer video conference management system also emerged under this historical background and made great progress. The application field of video conferencing is expanding and has become a new and important method of information communication in today's society. This article will briefly analyze the basic principles and usage methods of video conferencing systems.
随着市场经济的日益发展,人与人之间的交流变得越来越频繁。随着科学技术的不断进步,通信方式也越来越发达。计算机视频会议管理系统也正是在这样的历史背景下应运而生,并取得了长足的发展。视频会议的应用领域不断扩大,已成为当今社会一种新的重要的信息交流方式。本文将简要分析视频会议系统的基本原理和使用方法。
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引用次数: 0
Design of intelligent window system based on OneNET cloud platform 基于OneNET云平台的智能窗口系统设计
Pub Date : 2022-06-30 DOI: 10.1117/12.2639277
Hongmei Zhao, Ying Zhu, Fukang Qu, Wei Cheng
Aiming at the security problems of existing windows, such as low intelligence and inability to monitor and control windows in real time, this paper designs an intelligent window system based on OneNET cloud platform. In this system, STM32 embedded single chip microcomputer is used as the main control unit, and the data acquisition module is used to upload the detected environmental data such as temperature, humidity, whether it is raining or not, whether someone is standing outside the window, etc. to OneNET cloud platform through ESP8266 Wi-Fi module, so that users can monitor the status of the window in real time on the intelligent terminal device, and at the same time, the window status can be adjusted in real time by issuing operation commands through software. The system has the advantages of low cost, simple and convenient design, fast running speed after testing, real-time monitoring of window status, anti-theft, child safety protection and intelligent control of windows.
针对现有窗口智能化程度低、无法对窗口进行实时监控等安全问题,本文设计了一种基于OneNET云平台的智能窗口系统。本系统采用STM32嵌入式单片机作为主控单元,数据采集模块通过ESP8266 Wi-Fi模块将检测到的温度、湿度、是否下雨、窗外是否有人等环境数据上传到OneNET云平台,使用户可以在智能终端设备上实时监控窗户的状态,同时,通过软件下发操作命令,可以实时调整窗口状态。该系统具有成本低、设计简单方便、测试后运行速度快、实时监控窗户状态、防盗、儿童安全保护、窗户智能控制等优点。
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引用次数: 0
Controlled text style transfer via noise enhancement of deep learning transformer 通过深度学习转换器的噪声增强控制文本样式转移
Pub Date : 2022-06-30 DOI: 10.1117/12.2639492
Xingxin Zhang, S. Shi, Zhi-xiong Guo, Gang Chen, Han Wei, Yongwang Tang, Liuyang Yu
Text style transfer is one of the controllable text generation tasks, which can convert text style attributes. The mainstream method is to separate the content and style of the text, and then combine the content vectors with other style vectors to generate. However, implicit expression cannot completely separate meaning and style, separation and recombination may also lead to a decrease in the naturalness and fluency of the text. Therefore, we propose a new idea, which first encodes the text into a latent representation, and iteratively optimizes the latent representation with the smallest changes to achieve style transfer. Introducing noise enhancement before generating results improves the robustness of the generated system and reduces the occurrence of individual results with large errors. Experiments show that our optimization method based on noise enhancement performs well on two public datasets, Yelp and Amazon. Result has excellent performance in three indicators: content preservation, transfer strength, and fluency.
文本样式转换是可控制的文本生成任务之一,它可以转换文本样式属性。主流的方法是将文本的内容和样式分离,然后将内容向量与其他样式向量组合生成。然而,隐性表达并不能将意义和风格完全分离,分离和重组也会导致语篇的自然度和流畅度下降。因此,我们提出了一种新的思路,首先将文本编码为潜在表征,并以最小的变化迭代优化潜在表征,以实现风格迁移。在生成结果之前引入噪声增强,提高了生成系统的鲁棒性,减少了单个结果出现较大误差的情况。实验表明,基于噪声增强的优化方法在Yelp和Amazon两个公共数据集上表现良好。结果在内容保存性、传递强度和流畅性三个指标上表现优异。
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引用次数: 0
Simulation on the design of digital pulse position modulation system 数字脉冲位置调制系统的仿真设计
Pub Date : 2022-06-30 DOI: 10.1117/12.2640677
L. Huẩn
Pulse Position Modulation (PPM) is an important modulation method in communication systems, which plays an important role in many branches. This paper is designed to investigate the basic principles and processes of PPM modulation, to derive the results of each branch of this project, to analyze the advantages and disadvantages of Pulse Position Modulation, and to determine the appropriate application direction for PPM and the scope for remediation. This project is based on the MATLAB software and uses a PPM signal with only four symbols to carry out modulate and demodulate it in four steps, thus completing this project. In the first part, PPM signals are generated in the form of a random sequence of Gray codes, resulting in a large number of points; Then, the generated signal passes through a Gaussian white noise channel, and the modulation points are placed on a constellation diagram of the PPM plane for observation. After that, demodulation is performed by using the minimum distance discrimination method, and some error points are listed. Finally, the SER vs SNR curve is plotted. This project can basically explain the working principle of PPM, help researchers to get familiar with the PPM modulation process, and make it easier to choose how to work with communication in practice. It will guide the research direction on how to improve the accuracy of PPM in the future to broaden the application of this method.
脉冲位置调制(PPM)是通信系统中一种重要的调制方式,在通信系统的许多分支中起着重要的作用。本文旨在研究PPM调制的基本原理和过程,得出本项目各分支的结果,分析脉冲位置调制的优缺点,确定PPM的合适应用方向和补救范围。本项目基于MATLAB软件,使用一个只有四个符号的PPM信号,分四步进行调制解调,从而完成本项目。在第一部分中,PPM信号以Gray码随机序列的形式产生,产生大量的点;然后,生成的信号通过高斯白噪声信道,将调制点放置在PPM平面的星座图上进行观测。然后,采用最小距离辨别法进行解调,并列出误差点。最后,绘制SER - SNR曲线。本课题可以基本说明PPM的工作原理,帮助研究人员熟悉PPM调制过程,在实际工作中更容易选择如何配合通信。将指导今后如何提高PPM精度的研究方向,拓宽该方法的应用范围。
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引用次数: 0
Research on embedded system of image acquisition and real-time processing based on ZYNQ 基于ZYNQ的嵌入式图像采集与实时处理系统研究
Pub Date : 2022-06-30 DOI: 10.1117/12.2642305
Zongjie Zhang, L. Peng
In order to meet the demand for flexible acquisition of video images and real-time processing of images, the speed and efficiency of image processing are improved. This paper is an embedded system based on the ZYNQ-7000 series chip which integrates ARM+FPGA structure for image acquisition and real-time processing. An improved sharpening algorithm that can be used for edge detection in the image processing module is proposed, and the algorithm is integrated into the hardware through the HLS tool that comes with Vivado, which realizes the flexible acquisition and real-time processing of video image data. By studying image processing algorithms commonly used in embedded acquisition and processing systems, an improved sharpening algorithm is designed based on threshold segmentation and image filtering and applied in experiments. In terms of hardware, it has the advantages of low power consumption, high performance and flexibility. In terms of algorithm, it not only improves the speed of image optimization processing, but also has a large development space and application value.
为了满足视频图像的灵活采集和实时处理的需求,提高了图像处理的速度和效率。本文是基于ZYNQ-7000系列芯片,采用ARM+FPGA结构,实现图像采集和实时处理的嵌入式系统。提出了一种改进的锐化算法,可用于图像处理模块的边缘检测,并通过Vivado自带的HLS工具将该算法集成到硬件中,实现了视频图像数据的灵活采集和实时处理。通过研究嵌入式采集处理系统中常用的图像处理算法,设计了一种基于阈值分割和图像滤波的改进锐化算法,并进行了实验应用。在硬件方面,它具有低功耗、高性能和灵活性的优点。在算法方面,不仅提高了图像优化处理的速度,而且具有较大的发展空间和应用价值。
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引用次数: 0
Research on defect detection method for end face of steel coil based on Faster-RCNN and YOLOv3 基于Faster-RCNN和YOLOv3的钢卷端面缺陷检测方法研究
Pub Date : 2022-06-30 DOI: 10.1117/12.2639156
Conghao Duan, Xifeng Wang, Lijuan Ji, Bin Zuo, Liu Li
At present, there are few researches on the detection of steel coil end face defects, and the existing detection methods cannot take into account the accuracy and speed of the problem. An improved Faster-RCNN and improved YOLOv3 detection algorithms are proposed. Since Faster-RCNN loses the underlying information during continuous sampling, it is difficult to detect small defects on the end face of the steel coil. It is proposed to use multi-scale feature fusion to improve the optimization. At the same time, due to the poor performance of the Faster-RCNN backbone network, the detection rate is slow. It is proposed to use A better-performing residual network alternative. In view of the inaccurate positioning of YOLOv3, it is proposed to use GIoU to replace the IoU in the original YOLOv3. Likewise, to further improve the YOLOv3 detection rate, a residual network is used instead of Darknet-53. Experimental analysis shows that the detection rate of the improved Faster-RCNN_R50 reaches 12.47Fps, the original Faster-RCNN is 8.35Fps, an increase of 4.12Fps, the detection accuracy (AP) of Faster-RCNN_R50 reaches 92.1%, and the original Faster-RCNN is 81.2 %, an increase of 10.9%; the improved YOLOv3_R50 detection rate is as high as 22.87Fps, the original YOLOv3 is 19.07Fps, an increase of 3.80Fps, the YOLOv3_R50 detection accuracy rate reaches 89.5%, the original YOLOv3 detection accuracy rate is 68.7%, an increase of 20.8% . The conclusion shows that in the absence of real-time detection requirements, the improved Faster- RCNN_R50 has the highest accuracy, and if there is a real-time detection requirement, the improved YOLOv3_R50 has the fastest speed, while also ensuring a certain detection accuracy.
目前,对钢卷端面缺陷检测的研究较少,现有的检测方法无法兼顾检测的准确性和速度问题。提出了一种改进的Faster-RCNN和改进的YOLOv3检测算法。由于fast - rcnn在连续采样过程中丢失了底层信息,因此很难检测到钢卷端面上的小缺陷。提出了采用多尺度特征融合改进优化的方法。同时,由于Faster-RCNN骨干网性能较差,检测速率较慢。提出了一种性能更好的剩余网络替代方案。鉴于YOLOv3定位不准确,建议使用GIoU代替原YOLOv3中的IoU。同样,为了进一步提高YOLOv3的检测率,使用残余网络代替Darknet-53。实验分析表明,改进后的Faster-RCNN_R50的检测率达到12.47Fps,原Faster-RCNN为8.35Fps,提高了4.12Fps,检测精度(AP)达到92.1%,原Faster-RCNN为81.2%,提高了10.9%;改进后的YOLOv3_R50检测准确率高达22.87Fps,原YOLOv3为19.07Fps,提高了3.80Fps, YOLOv3_R50检测准确率达到89.5%,原YOLOv3检测准确率为68.7%,提高了20.8%。结论表明,在没有实时检测要求的情况下,改进后的Faster- RCNN_R50精度最高,在有实时检测要求的情况下,改进后的YOLOv3_R50速度最快,同时也保证了一定的检测精度。
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引用次数: 0
Application of digital pulse position modulation 数字脉冲位置调制的应用
Pub Date : 2022-06-30 DOI: 10.1117/12.2640517
Zaicheng Yu
This paper introduces the basic knowledge about PPM and four PPM related applications, namely, PPM modulation and demodulation based blue-green laser communication system, PPM modulation based underwater optical communication system design and simulation, PPM based optical communication positioning accuracy enhancement, and atmospheric laser communication PPM modulation and demodulation system design and simulation. In all four applications, PPM plays a vital role and the applications reflect the various uses of PPM in different areas of communication. This article will provide further insight into the applications and knowledge of PPM.
本文介绍了PPM的基本知识和PPM相关的四种应用,即基于PPM调制解调的蓝绿激光通信系统、基于PPM调制的水下光通信系统设计与仿真、基于PPM的光通信定位精度提高、大气激光通信PPM调制解调系统设计与仿真。在所有四个应用程序中,PPM都扮演着至关重要的角色,并且这些应用程序反映了PPM在不同通信领域中的各种用途。本文将进一步深入了解PPM的应用程序和知识。
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引用次数: 0
Communication network operation and maintenance platform based on artificial intelligence data analysis 基于人工智能数据分析的通信网络运维平台
Pub Date : 2022-06-30 DOI: 10.1117/12.2639981
Zhao Yang, Xin Zhao, Shujun Kang
Distribution network communication operation and maintenance platform rely on communication network. The distribution network substation needs to obtain distribution network operation data configuration through communication network. The reliability of communication network directly affects the protection performance. Therefore, there is a need to establish a communication network that is reliable and meet protection performance requirements. In order to improve the engineering application of distribution network communication operation and maintenance platform, it is necessary to quantitatively evaluate the data quality of the distribution network communication operation and maintenance platform. Based on the construction background of smart distribution network, this paper studies the architecture of distribution network communication operation and maintenance platform. Starting from the requirements of information interconnection, intercommunication, interoperability and plug-and-play, the description specification of distribution network communication operation is established according to the principle of artificial intelligence data analysis. The unified modeling of protection and control system is realized. By analyzing the business composition of regional protection and self-healing control system of distribution network, the size of network information flow is quantitatively evaluated, which provides a basis for the engineering application of regional protection and self-healing control system of the distribution network. Experimental analysis shows that compared with the traditional method, the comprehensive performance of this method is improved by 10%. The partial performance is improved by 40%, which can support the master-slave regional protection and control business system.
配电网通信运维平台依赖于通信网络。配电网变电站需要通过通信网络获取配电网运行数据配置。通信网络的可靠性直接影响保护性能。因此,需要建立可靠且满足保护性能要求的通信网络。为了提高配电网通信运维平台的工程应用水平,有必要对配电网通信运维平台的数据质量进行定量评价。本文以智能配电网建设为背景,研究了配电网通信运维平台的体系结构。从信息互联、互通、互操作、即插即用的需求出发,根据人工智能数据分析原理,建立配电网通信运行描述规范。实现了保护与控制系统的统一建模。通过分析配电网区域保护自愈控制系统的业务构成,定量评价网络信息流的大小,为配电网区域保护自愈控制系统的工程应用提供依据。实验分析表明,与传统方法相比,该方法的综合性能提高了10%。局部性能提高40%,可支持主从区域保护与控制业务系统。
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引用次数: 0
期刊
Neural Networks, Information and Communication Engineering
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