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Research on image features extraction based on machine learning algorithms 基于机器学习算法的图像特征提取研究
Xiao-Chuang Chang
Image features are essential components for physical detection, classification of objectives and downstream tasks. Specifically, the image features can be utilized to automatically detect the characteristics of images and realize physical information mapping into information domains. However, existing image features are concentrated on the decrease the contrast, which can reduce the influence of lights. Another extraction process converts images into digital images and utilize digital information techniques to obtain the features. In this paper, we utilize the machine learning model to extract the features of images with enough training iterations. Initially, we utilize the CIFAR-10 data set, which contains the 10 categories of physical objectives and simulate as the training set. Indeed, the establish machine learning model is utilize to train through inputting the 80% of total data set. After training process, the output of machine learning mode can obtain the features of any physical images. Finally, we compare our proposed model with existing image features extraction methods and utilize 20% data to evaluate our model. From our extensive experimental results, we can conclude that our established model can effectively achieve the image features extraction with higher extraction accuracy and acceptable computation time through comparing with traditional mathematical analysis methods.
图像特征是物理检测、目标分类和下游任务的基本组成部分。具体来说,利用图像特征可以自动检测图像的特征,实现物理信息映射到信息域。然而,现有的图像特征集中在降低对比度上,可以减少光的影响。另一种提取方法是将图像转换为数字图像,并利用数字信息技术获得特征。在本文中,我们利用机器学习模型提取足够训练迭代的图像特征。首先,我们使用CIFAR-10数据集作为训练集,该数据集包含10类物理目标和模拟。实际上,通过输入总数据集的80%,利用建立的机器学习模型进行训练。经过训练过程,机器学习模式的输出可以获得任何物理图像的特征。最后,我们将我们提出的模型与现有的图像特征提取方法进行比较,并利用20%的数据对我们的模型进行评估。从我们广泛的实验结果来看,与传统的数学分析方法相比,我们所建立的模型可以有效地实现图像特征提取,提取精度更高,计算时间也可以接受。
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引用次数: 0
Research progress of crop seed quality detection based on spectral imaging technology 基于光谱成像技术的作物种子品质检测研究进展
Hui Li, Chengjun Zou, Xuliang Duan
Seed is the key link to ensure the yield and quality of crops, and seed quality plays a vital role in ensuring agricultural production. For seed quality testing, traditional methods have problems such as irreversible destruction, strong professionalism, complex process, long cycle, high cost, and inability to detect seeds online and real-time, which are difficult to meet the requirements of modern agriculture for non-destructive, rapid and efficient production of seeds. Spectral imaging technology has been widely used in the non-destructive and rapid detection of agricultural products, food, etc., with its advantages of fast, efficient, nondestructive and simple. The research progress of three spectral imaging technologies in seed quality detection was reviewed from the perspective of multispectral image recognition, hyperspectral image recognition and near-infrared spectral imaging. The basic principles, key technologies, implementation methods and application research results of the three spectral imaging technologies were compared, analyzed and summarized. The advantages and problems of spectral imaging technology detection and identification in crop seed quality detection were pointed out, In view of these problems, the future research directions are given to improve the understanding of agricultural information detection process using spectral imaging technology and promote the development of agricultural seed sources and other key agricultural core technologies.
种子是保证作物产量和品质的关键环节,种子质量对保证农业生产起着至关重要的作用。对于种子质量检测,传统方法存在不可逆破坏、专业性强、流程复杂、周期长、成本高、无法在线实时检测种子等问题,难以满足现代农业对种子无损、快速、高效生产的要求。光谱成像技术以其快速、高效、无损、简便等优点,已广泛应用于农产品、食品等的无损快速检测中。从多光谱图像识别、高光谱图像识别和近红外光谱成像的角度综述了三种光谱成像技术在种子品质检测中的研究进展。对三种光谱成像技术的基本原理、关键技术、实现方法和应用研究成果进行了比较、分析和总结。指出了光谱成像技术检测识别在作物种子质量检测中的优势和存在的问题,针对这些问题,提出了未来的研究方向,以提高人们对利用光谱成像技术进行农业信息检测过程的认识,促进农业种子源等农业关键核心技术的开发。
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引用次数: 0
Sentiment analysis of online public opinion based on CNN-BiLSTM and attention mechanism 基于CNN-BiLSTM和关注机制的网络舆情情感分析
Lingwei Wei, Lei Yang
Emotion recognition from social network texts aims to mine netizens’ subjective emotions, such as stances and emotional tendencies, over an event, which is imperative for monitoring Internet public opinion. Convolutional neural networks (CNN) and bidirectional long short-term memory (BiLSTM) are widely used in the field of text classification. The combination of the two can exploit the CNNs’ feature extraction ability and BiLSTM’s ability to extract context dependency. However, for emotional recognition, it is also necessary to consider some specific words in online social text. Therefore, we constructed a model for emotion recognition based on Internet public opinion in three steps. First, the CNN was used to extract local features of social network texts. Second, context-related global features were extracted using the BiLSTM. Finally, we introduced an attention mechanism to obtain important features. Experiments were conducted using netizens’ comments from a microblog during the COVID-19 epidemic as the dataset. Experimental results showed that the feature vector of the proposed model (i.e., the CNN-BiLSTM-Attention model) contains richer semantic information of texts, which can effectively improve the performance of emotion recognition from Internet public opinions.
社交网络文本情感识别的目的是挖掘网民对事件的主观情感,如立场和情感倾向,这是网络舆情监测的必要条件。卷积神经网络(CNN)和双向长短期记忆(BiLSTM)在文本分类领域得到了广泛的应用。两者的结合可以利用cnn的特征提取能力和BiLSTM提取上下文依赖关系的能力。然而,对于情感识别,也需要考虑网络社交文本中的一些特定词汇。因此,我们分三步构建了基于网络舆情的情感识别模型。首先,利用CNN提取社交网络文本的局部特征。其次,利用BiLSTM提取上下文相关的全局特征;最后,我们引入了一个注意机制来获取重要的特征。实验以新冠疫情期间某微博上的网友评论为数据集。实验结果表明,所提模型的特征向量(即CNN-BiLSTM-Attention模型)包含了更丰富的文本语义信息,能够有效提高网络舆情情感识别的性能。
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引用次数: 0
Analysis and research on the accuracy of optical fiber two-way time synchronization signal based on spread spectrum code ranging 基于扩频码测距的光纤双向时间同步信号精度分析与研究
H. Sun, H. Gong, Jing Peng, Wenchi Zang, Ming Ma
To solve the problem of time synchronization between two stations in an optical two-way time synchronization system, an optical time synchronization scheme based on spread spectrum code ranging is presented. Time difference between sites is measured by spread spectrum code ranging, and link delay is eliminated by two-way method to achieve time synchronization between two sites. The accuracy of time synchronization between stations is affected by the accuracy of time difference measurement. By analyzing the structure and measurement principle of receiver code tracking loop, it is found that the accuracy of time difference measurement is mainly related to the signal system, carrier-noise ratio and receiver parameter settings. The carrier-noise ratio of links and receiver parameter conditions are determined. Through the analysis of different signal systems time difference accuracy, the signal system that can meet the requirements of highprecision time synchronization is selected.
为解决光双向时间同步系统中两站时间同步问题,提出了一种基于扩频码测距的光时间同步方案。采用扩频码测距法测量站点间的时间差,采用双向法消除链路延迟,实现站点间的时间同步。时差测量的精度直接影响台站间时间同步的精度。通过分析接收机码跟踪环路的结构和测量原理,发现时差测量的精度主要与信号系统、载波噪声比和接收机参数设置有关。确定了链路的载波噪声比和接收机参数条件。通过对不同信号系统时差精度的分析,选择了能够满足高精度时间同步要求的信号系统。
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引用次数: 0
Research on encryption algorithms in terahertz communication systems 太赫兹通信系统中的加密算法研究
Yuanming Ding, Jing Cui, Jianxin Jianxin
Aiming at the problem that the terahertz wave beam is narrow and directionality is strong, which makes it easy for the enemy to eavesdrop on the data information, and thus the information cannot be transmitted safely, a pseudo-random sequence generation method based on n-LFSR and AV-NL chaotic mapping is proposed. Different algorithms are selected according to the number of LFSRs. At the same time, the absolute value nonlinear chaotic map is generalized. Finally, the generated two pseudo-random sequences are XOR combined to form the final pseudo-random sequence for source encryption. The simulation results show that this method takes into account the advantages of simple design of linear feedback shift register and high chaotic randomness. The generated pseudo-random sequence has both high linear complexity and the advantages of chaotic non-linearity. The high randomness used in source encryption can improve the security of the system.
针对太赫兹波束窄、方向性强,容易被敌方窃听到数据信息而导致信息无法安全传输的问题,提出了一种基于n-LFSR和AV-NL混沌映射的伪随机序列生成方法。根据lfsr的数量选择不同的算法。同时对绝对值非线性混沌映射进行了推广。最后,对生成的两个伪随机序列进行异或组合,形成最终的伪随机序列进行源加密。仿真结果表明,该方法兼顾了线性反馈移位寄存器设计简单、混沌随机性高的优点。生成的伪随机序列既具有较高的线性复杂度,又具有混沌非线性的优点。在源加密中采用的高随机性可以提高系统的安全性。
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引用次数: 0
Video face recognition based on 3D chaotic attractor 基于三维混沌吸引子的视频人脸识别
Xiang Li, Xiaoran Chen, Wanbo Yu
In this paper, we propose an image feature extraction method based on 3D chaotic attractor, and carry out face video recognition. By adjusting the auxiliary function, the feature point set is located on a plane in the 3D coordinate system. The experiment shows that the feature point set on the plane can extract face features better and recognize faces more efficiently. This method is faster and has higher recognition rate than the method that uses trigonometric function to iteratively generate image feature point set to recognize face in video.
本文提出了一种基于三维混沌吸引子的图像特征提取方法,并进行了人脸视频识别。通过调整辅助函数,将特征点集定位在三维坐标系中的平面上。实验表明,该平面上的特征点集可以更好地提取人脸特征,提高人脸识别效率。该方法比利用三角函数迭代生成图像特征点集进行视频人脸识别的方法速度更快,识别率更高。
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引用次数: 0
FPGA implementation of QPSK visible light communication system QPSK可见光通信系统的FPGA实现
Haoshen Wei, Shanchun Zong, Xiaohong Sun
According to the principle of digital modulation and demodulation system, the Quadrature Phase Shift Keying (QPSK) modulation and demodulation module is implemented with Verilog HDL language, and the error caused by incoherent demodulation is reduced by compensating the circuit carrier error. In the process of development, intellectual property core (IP) is used to develop the communication system, including bit synchronization technology, baseband signal generator, phase-locked loop, etc., which greatly increases the convenience of development. The reception performance of visible light receiving circuit is improved by combining three-stage amplifier circuit, and the communication and anti-noise performance of visible light communication system are enhanced by using high-order modulation mode with multi-stage photoelectric conversion receiving circuit. Through the FPGA (Field Programmable Gate Array) development board for on-board testing, the whole set of visible light communication system is designed with photoelectric conditioning circuit
根据数字调制解调系统的原理,用Verilog HDL语言实现了正交相移键控(QPSK)调制解调模块,通过补偿电路载波误差来减小非相干解调引起的误差。在开发过程中,采用了知识产权核心(IP)来开发通信系统,包括位同步技术、基带信号发生器、锁相环等,大大增加了开发的便利性。结合三级放大电路提高可见光接收电路的接收性能,采用高阶调制方式配合多级光电转换接收电路提高可见光通信系统的通信性能和抗噪声性能。通过FPGA(现场可编程门阵列)开发板进行板上测试,设计了整套可见光通信系统的光电调理电路
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引用次数: 0
Study on satellite communication transmission of meteorological information between main stations based on state transfer 基于状态转移的主站气象信息卫星通信传输研究
Xiaojuan Fu, Yinglang Huang, Jiabao Huang, Zhang Li
Based on the information provided in Problem D of the 2022 National College Mathematical Modeling Contest, only considering the transmission and reception of meteorological message between the main stations, the success rate of sending and receiving is 100% , set half-time information as one unit, then each main station can transmit up to three units、150 characters (less than the limit of 158) at a time.Using the method of sequential transmission in turn, the first round and the last round are studied separately, the other rounds meet the maximum transmission of cases, the relationship between the minimum value of K and N is modeled, as shown in the formula (1) . As result, it takes at least 4.67(rounded up to 5) minutes to transmit 6 rounds, the information sharing between 9 master stations can be realized. Then, according to the state characteristics of each main station after each round of transmission,the state transfer equations between the main stations are established, such as formulas (8) and (9), and the scheme of meteorological message transmission for each round of main station 1 is obtained.
根据2022年全国高校数学建模竞赛题D提供的信息,仅考虑主站之间气象电文的收发,发送和接收的成功率为100%,设半场信息为一个单位,则每个主站最多可发送三个单位,每次发送150个字符(少于158个字符的限制)。采用顺序依次传递的方法,分别对第一轮和最后一轮进行研究,其余轮满足最大传递的情况下,对K的最小值与N的关系进行建模,如式(1)所示。因此,传输6轮至少需要4.67分钟(四舍五入),可以实现9个主站之间的信息共享。然后,根据每轮传输后各主站的状态特征,建立主站之间的状态传递方程,如式(8)和式(9),得到主站1每轮气象电文传输方案。
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引用次数: 0
Communication signal modulation recognition based on cyclic spectrum features and bagged decision tree 基于循环频谱特征和套袋决策树的通信信号调制识别
Tianyi Huang, F. Xin, Jiachen Wang
With the increasing diversification of signal modulation types, the importance of signal modulation recognition is increasing, which is an important part between signal detection and demodulation. It has great applied value in jamming identification, electronic countermeasures, intelligent modem and other fields. Aiming at the improvement of recognition accuracy for some modulation types, a communication signal modulation recognition method based on cyclic spectrum features and bagged decision tree is proposed. The method extracts the cyclic spectrum features of signals and inputs them into the bagged decision tree for model training. Simulation results show that the accuracy of the proposed method reaches 93.8%, which is 39.4% higher than that of the traditional recognition method with high-order cumulants and 22.2% higher than that of the method using the original signal directly.
随着信号调制类型的日益多样化,信号调制识别作为信号检测与解调之间的重要一环,其重要性与日俱增。在干扰识别、电子对抗、智能调制解调器等领域具有重要的应用价值。为了提高对某些调制类型的识别精度,提出了一种基于循环频谱特征和套袋决策树的通信信号调制识别方法。该方法提取信号的循环谱特征,并将其输入到袋装决策树中进行模型训练。仿真结果表明,该方法的识别准确率达到93.8%,比传统的高阶累积量识别方法提高了39.4%,比直接使用原始信号的方法提高了22.2%。
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引用次数: 0
UTSN-net: medical image semantic segmentation model based on skip non-local attention module UTSN-net:基于跳过非局部关注模块的医学图像语义分割模型
Li Zhang, BinBing Zhu, Chunpeng Ma
The semantic segmentation task of medical image is to segment the focus, organ or substructure of human body in medical image. It plays an important role in locating and identifying the diseased area and making medical plan. In various medical image segmentation tasks, the U-shaped architecture has achieved great success. Transunet introduces Transformer with global attention mechanism into the U-shaped architecture, which overcomes the inherent limitations of convolution, but because it still continues the original skip connections structure, it will bring the strong noise from features in the shallow network into the high semantic features of the deep network, thus affecting the segmentation accuracy. UTSN-net model based on the combination of Transformer and nonlocal attention mechanism is proposed. UTSN-net uses Transformer to overcome the inherent limitations of convolution, and introduces the skip connections module based on nonlocal attention mechanism into the U-shaped network, which can comprehensively consider the deep features with global context information and the shallow features with accurate high-resolution positioning information to improve the accuracy of segmentation results. Experiments on synapse multi-organ abdominal CT dataset verify that UTSN-net has better semantic segmentation performance.
医学图像的语义分割任务是对医学图像中人体的焦点、器官或子结构进行分割。它对病区的定位、识别和制定医疗计划起着重要的作用。在各种医学图像分割任务中,u型架构取得了很大的成功。Transunet在u型架构中引入了具有全局关注机制的Transformer,克服了卷积固有的局限性,但由于它仍然延续了原有的跳过连接结构,会将浅层网络中特征的强噪声带入深度网络的高语义特征中,从而影响分割精度。提出了基于Transformer和非局部注意机制相结合的UTSN-net模型。UTSN-net利用Transformer克服了卷积固有的局限性,在u形网络中引入了基于非局部注意机制的跳过连接模块,可以综合考虑具有全局上下文信息的深层特征和具有精确高分辨率定位信息的浅层特征,提高分割结果的准确性。在突触多器官腹部CT数据集上的实验验证了UTSN-net具有更好的语义分割性能。
{"title":"UTSN-net: medical image semantic segmentation model based on skip non-local attention module","authors":"Li Zhang, BinBing Zhu, Chunpeng Ma","doi":"10.1117/12.2682365","DOIUrl":"https://doi.org/10.1117/12.2682365","url":null,"abstract":"The semantic segmentation task of medical image is to segment the focus, organ or substructure of human body in medical image. It plays an important role in locating and identifying the diseased area and making medical plan. In various medical image segmentation tasks, the U-shaped architecture has achieved great success. Transunet introduces Transformer with global attention mechanism into the U-shaped architecture, which overcomes the inherent limitations of convolution, but because it still continues the original skip connections structure, it will bring the strong noise from features in the shallow network into the high semantic features of the deep network, thus affecting the segmentation accuracy. UTSN-net model based on the combination of Transformer and nonlocal attention mechanism is proposed. UTSN-net uses Transformer to overcome the inherent limitations of convolution, and introduces the skip connections module based on nonlocal attention mechanism into the U-shaped network, which can comprehensively consider the deep features with global context information and the shallow features with accurate high-resolution positioning information to improve the accuracy of segmentation results. Experiments on synapse multi-organ abdominal CT dataset verify that UTSN-net has better semantic segmentation performance.","PeriodicalId":440430,"journal":{"name":"International Conference on Electronic Technology and Information Science","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125646230","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
期刊
International Conference on Electronic Technology and Information Science
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