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Research of Strapdown Integrated Navigation System Based on Rotation Control Technology 基于旋转控制技术的捷联组合导航系统研究
Pub Date : 2023-04-21 DOI: 10.26549/met.v7i1.11641
Xu Dong, J. Dong, Hui Wang, Zong Yan
To realize high-precision Single-axial Rotating FOG-SINS, a low-power, low-cost, middle-precision rotating control mechanism design for single axial rotating navigation system is put forward. Through theory analysis, design and experimental verification, the rotating control mechanism has good control precision and high reliability, which meets the demands for developing middle & high-precision FOG-SINS.
为了实现高精度单轴旋转陀螺SINS,提出了一种低功耗、低成本、中精度的单轴旋转导航系统旋转控制机构设计。通过理论分析、设计和实验验证,该旋转控制机构具有良好的控制精度和高可靠性,满足中高精度光纤陀螺SINS的研制要求。
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引用次数: 0
Application of PCA Numalgorithm in Remote Sensing Image Processing PCA数字算法在遥感图像处理中的应用
Pub Date : 2023-04-21 DOI: 10.26549/met.v7i1.12317
Hong Dai
A numerical algorithm of principal component analysis (PCA) is proposed and its application in remote sensing image processing is introduced:(1) Multispectral image compression; (2) Multi-spectral image noise cancellation; (3) Information fusion of multi-spectral images and spot panchromatic images. The software experiments verify and evaluate the effectiveness and accuracy of the proposed algorithm.
提出了一种主成分分析(PCA)的数值算法,并介绍了其在遥感图像处理中的应用:(1)多光谱图像压缩;(2)多光谱图像去噪;(3)多光谱图像与斑点全色图像的信息融合。软件实验验证了该算法的有效性和准确性。
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引用次数: 0
Dynamic Prediction Method for Valuable Spare Parts Demand in Weaponry Equipment Based on Data Perception 基于数据感知的武器装备有价备件需求动态预测方法
Pub Date : 2023-04-21 DOI: 10.26549/met.v7i1.11941
Weiyi Wu, Yunxian Jia, Yangyang Zhang, B. Liu
Missile is an important weapon system of the army. The spare parts of missile equipment are significant effect on military operations. In order to improve the mission completion rate of missile equipment in wartime, thispaper introduces data sensing method to forecast the demand of valuablespare parts of missile equipment dynamically. Firstly, the information related to valuable spare parts of missile equipment was obtained by data sensing, and the sample size was determined by Bernoulli uniform sampling probability. Secondly, according to the data quality of multisource and multi-modal, the data requirement for dynamic demand prediction of valuable spare parts of missile equipment was obtained. Finally, according to the characteristics of the spare parts, the life of the spare parts was predicted, realizing the dynamic prediction of the demand for valuable spare parts of missile equipment. The results show that the demand of valuable spare parts of missile equipment can be predicted dynamically by using this method, the accuracy is higher than 95%, and the real-time performance is more excellent.
导弹是军队的重要武器系统。导弹装备的备件对军事行动具有重要影响。为了提高战时导弹装备的任务完成率,本文采用数据传感方法对导弹装备的易损件需求进行动态预测。首先,通过数据传感获得导弹装备有价值备件的相关信息,并通过伯努利均匀采样概率确定样本量。其次,根据多源多模态的数据质量,得到了导弹装备贵重零部件动态需求预测的数据需求。最后,根据备件的特点,对备件的寿命进行了预测,实现了对导弹装备贵重备件需求的动态预测。结果表明,该方法可以动态预测导弹装备贵重零部件的需求量,准确率高于95%,实时性更高。
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引用次数: 0
Study of Wireless Sensor Network Based on Optical Communication: Research Challenges and Current Results 基于光通信的无线传感器网络研究:研究挑战与现状
Pub Date : 2022-06-23 DOI: 10.26549/met.v6i1.11372
Xinrui Li, Dandan Li
With the rapid developments of commercial demands, a majority of advanced researches have been investigated for the applications of underwater wireless sensor (WSN) networks. Recently optical communication has been considered for underwater wireless sensor network. An experimental set-up for testing optical communication underwater has been provided and designed in present papers to maximize the energy coupled from these displacements to the transduction mechanism that converts the mechanical energy into electrical. The true case has been considered by measuring diffuse attenuation coefficients in different seas. One stand out potential optical communication method, Visible Light Communication (VLC) has been talked and several communication methods are compared from many points of view, for example attenuation in salt water. The evaluation of modulation techniques for underwater wireless optical communications has been displayed, and further how the data collection and storage with an underwater WSN is introduced. In this paper current researches for an (UWSN) based on optical communication are studied, in particular the potential VLC method and comparisons of VLC with other optical communication approaches. Underwater challenges would be analyzed by comparing a sort of communication methods, applied in underwater. Future work will be developed at last.
随着商业需求的快速发展,人们对水下无线传感器网络的应用进行了大量的深入研究。近年来,光通信技术已成为水下无线传感器网络的研究热点。本文提供并设计了一种测试水下光通信的实验装置,以最大限度地利用从这些位移耦合到将机械能转换为电能的转导机制的能量。通过测量不同海域的扩散衰减系数,考虑了真实情况。本文讨论了一种极具潜力的光通信方法——可见光通信(VLC),并从多个角度对几种通信方法进行了比较,例如在盐水中的衰减。介绍了水下无线光通信调制技术的评价,并进一步介绍了水下无线传感器网络的数据采集和存储方法。本文研究了基于光通信的UWSN的研究现状,重点介绍了潜在的VLC方法以及VLC与其他光通信方法的比较。通过对水下通信方式的比较,分析了水下通信面临的挑战。未来的工作将最终展开。
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引用次数: 0
Research of Paraphrasing for Chinese Complex Sentences Based on Templates 基于模板的汉语复句释义研究
Pub Date : 2022-06-23 DOI: 10.26549/met.v6i1.11421
Zhongjian Wang, Ling Wang
Based on the paraphrasing of Chinese simple sentences, the complex sentence paraphrasing by using templates are studied. Through the classification of complex sentences, syntactic analysis and structural analysis, the proposed methods construct complex sentence paraphrasing templates that the associated words are as the core. The part of speech tagging is used in the calculation of the similarity between the paraphrasing sentences and the paraphrasing template. The joint complex sentence can be divided into parallel relationship, sequence relationship, selection relationship, progressive relationship, and interpretive relationship’s complex sentences. The subordinate complex sentence can be divided into transition relationship, conditional relationship, hypothesis relationship, causal relationship and objective relationship’s complex sentences. Joint complex sentence and subordinate complex sentence are divided to associated words. By using pretreated sentences, the preliminary experiment is carried out to decide the threshold between the paraphrasing sentence and the template. A small scale paraphrase experiment shows the method is availability, acquire the coverage rate of paraphrasing template 40.20% and the paraphrase correct rate 62.61%.
以汉语简单句的意译为基础,研究了用模板进行复句意译的方法。通过对复句的分类、句法分析和结构分析,构建了以关联词为核心的复句释义模板。词性标注用于计算释义句与释义模板之间的相似度。联合复句可分为平行关系复句、顺序关系复句、选择关系复句、递进关系复句和解释关系复句。从属复句可分为过渡关系、条件关系、假设关系、因果关系和客观关系的复句。联合复句和从属复句分为关联词。通过预处理句子进行初步实验,确定释义句与模板之间的阈值。小规模释义实验表明,该方法是有效的,获得了释义模板覆盖率40.20%和释义正确率62.61%。
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引用次数: 0
Automatic Sentiment Classification of News Using Machine Learning Methods 使用机器学习方法的新闻自动情感分类
Pub Date : 2022-06-23 DOI: 10.26549/met.v6i1.11132
Yuhan Wang
With the rapid development of social economy, the society has entered into a new stage of development, especially in new media under the background of rapid development, makes the importance of news and information to get the comprehensive promotion, and in order to further identify the positive and negative news, should be fully using machine learning methods, based on the emotion to realize the automatic classifying of news, in order to improve the efficiency of news classification. Therefore, the article first makes clear the basic outline of news sentiment classification. Secondly, the specific way of automatic classification of news emotion is deeply analyzed. On the basis of this, the paper puts forward the concrete measures of automatic classification of news emotion by using machine learning.
随着社会经济的快速发展,社会进入了一个新的发展阶段,特别是在新媒体快速发展的背景下,使新闻和信息的重要性得到了全面的提升,为了进一步识别正面和负面新闻,应充分利用机器学习方法,基于情感实现新闻的自动分类,以提高新闻分类的效率。因此,本文首先明确了新闻情感分类的基本轮廓。其次,深入分析了新闻情感自动分类的具体方法。在此基础上,提出了利用机器学习实现新闻情感自动分类的具体措施。
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引用次数: 1
Research on Handwritten Chinese Character Recognition Based on BP Neural Network 基于BP神经网络的手写体汉字识别研究
Pub Date : 2022-06-23 DOI: 10.26549/met.v6i1.11359
Z. Ning
The application of pattern recognition technology enables us to solve various human-computer interaction problems that were difficult to solve before. Handwritten Chinese character recognition, as a hot research object in image pattern recognition, has many applications in people’s daily life, and more and more scholars are beginning to study off-line handwritten Chinese character recognition. This paper mainly studies the recognition of handwritten Chinese characters by BP (Back Propagation) neural network. Establish a handwritten Chinese character recognition model based on BP neural network, and then verify the accuracy and feasibility of the neural network through GUI (Graphical User Interface) model established by Matlab. This paper mainly includes the following aspects: Firstly, the preprocessing process of handwritten Chinese character recognition in this paper is analyzed. Among them, image preprocessing mainly includes six processes: graying, binarization, smoothing and denoising, character segmentation, histogram equalization and normalization. Secondly, through the comparative selection of feature extraction methods for handwritten Chinese characters, and through the comparative analysis of the results of three different feature extraction methods, the most suitable feature extraction method for this paper is found. Finally, it is the application of BP neural network in handwritten Chinese character recognition. The establishment, training process and parameter selection of BP neural network are described in detail. The simulation software platform chosen in this paper is Matlab, and the sample images are used to train BP neural network to verify the feasibility of Chinese character recognition. Design the GUI interface of human-computer interaction based on Matlab, show the process and results of handwritten Chinese character recognition, and analyze the experimental results.
模式识别技术的应用使我们能够解决以前难以解决的各种人机交互问题。手写体汉字识别作为图像模式识别的热门研究对象,在人们的日常生活中有着广泛的应用,越来越多的学者开始研究离线手写体汉字的识别。本文主要研究了BP神经网络在手写体汉字识别中的应用。建立了基于BP神经网络的手写体汉字识别模型,并通过Matlab建立的GUI(Graphical User Interface)模型验证了神经网络的准确性和可行性。本文主要包括以下几个方面:首先,分析了本文中手写体汉字识别的预处理过程。其中,图像预处理主要包括六个过程:灰度化、二值化、平滑去噪、字符分割、直方图均衡化和归一化。其次,通过对手写体汉字特征提取方法的比较选择,并通过对三种不同特征提取方法结果的比较分析,找到了最适合本文的特征提取方法。最后,介绍了BP神经网络在手写体汉字识别中的应用。详细介绍了BP神经网络的建立、训练过程和参数选择。本文选择的仿真软件平台是Matlab,并利用样本图像对BP神经网络进行训练,验证了汉字识别的可行性。设计了基于Matlab的人机交互GUI界面,展示了手写体汉字识别的过程和结果,并对实验结果进行了分析。
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引用次数: 0
Japanese-Chinese Machine Translation of Japanese Determiners Based on Templates 基于模板的日语行列式的日中机器翻译
Pub Date : 2022-06-23 DOI: 10.26549/met.v6i1.11422
Ling Wang, Zhongjian Wang
The machine translation of Japanese sentences with determiners, like “shika...nai”, “tyoutto...dakedeha”, “tada...dake” and so on, are more special and regular on sentences structure. The research collects and classifies the Japanese sentences which contain the determiners. The classification is carried out by according to the characteristics of Japanese sentences and translation habit of Chinese sentences. Through further abstraction and simplification, translation templates are extracted by gathering grammar rules information, studying syntax and analysis the collocation mode of sentences. Those determiners express confirmed meaning, and the corresponding translation Chinese sentences have the same characteristic. By analyzing the sentence characteristics with determiners and formalizing the sentences structure, the translation templates are abstracted. By investigating the structure characteristic of original sentences with translation templates, the similarity algorithm was defined. The threshold value of the similarity calculation was obtained by preliminary experiments, and the experiments of Japanese-Chinese translation are carried out by a small corpus. The experimental results for several kinds of Japanese sentences with determiners show the translation accuracy rate is 68.6%, template coverage rate reach 83.3%. At last, through the analysis for the translation errors, following conclusion is drawn: the results of morphological analysis are erroneous, because the error of word segmentation the part of speech tagging also are erroneous, result in the grammar structure cannot match with templates; the original sentences are long and especially complex sentences; the templates are too complicated; the similarity calculation method needs to discuss further, and so on.
带有限定词的日语句子的机器翻译,如“shika…nai”、“tyoutto…dakedha”、“tada…dake”等,在句子结构上更具特殊性和规律性。本研究收集并分类了含有限定词的日语句子。根据日语句子的特点和汉语句子的翻译习惯进行分类。通过进一步的抽象和简化,收集语法规则信息,研究句法,分析句子的搭配方式,提取翻译模板。这些限定词表达了确定的意义,相应的翻译汉语句子也具有相同的特点。通过用限定词分析句子特征,并将句子结构形式化,抽象出翻译模板。通过研究翻译模板下原句的结构特点,定义了相似度算法。通过初步实验获得了相似度计算的阈值,并在一个小语料库中进行了日汉翻译实验。对几种带有限定词的日语句子的实验结果表明,其翻译准确率为68.6%,模板覆盖率达到83.3%。最后,通过对翻译错误的分析,得出以下结论:形态学分析的结果是错误的,因为分词和词性标注的错误也是错误的,导致语法结构与模板不匹配;原句是长句,尤其是复句;模板过于复杂;相似度的计算方法还有待进一步探讨。
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引用次数: 0
Preparation and Performance of CdZnTe Ray Detector CdZnTe射线探测器的制备与性能
Pub Date : 2022-06-23 DOI: 10.26549/met.v6i1.9507
Jun Jiang
γ-ray and x-ray detectors made by Cd1-xZnxTe alloy can gain high energy resolution and detect efficiency at room temperature due to its high atomic number, large energy gap and high density, which were well-developed recently. By well controlled of Cadmium partial pressure and compensatory doping technique, Ф90 mm Cd1-xZnxTe alloy obtained successfully (ρ≥1011 Ω·cm) by an improved-Bridgman method. 3 mm × 3 mm × 3 mm CZT detector was made at Kunming Institute of Physics, which has energy resolution of 3.52% (FWHM) at room temperature when detect 59.54 KeV Am241 γ-ray source.
Cd1-xZnxTe合金制备的γ射线和x射线探测器由于其原子序数高、能隙大、密度高,在室温下可以获得较高的能量分辨率和探测效率。通过良好控制镉分压和补偿掺杂技术,采用改进的Bridgman法成功地获得了Φ90mmCd1-xZnxTe合金(ρ≥1011Ω·cm)。昆明物理研究所研制的3mm×3mm×3mm CZT探测器,在检测59.54KeV Am241γ射线源时,室温下的能量分辨率为3.52%。
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引用次数: 0
Trends of Robot Application——Ethical Response 机器人应用趋势——伦理回应
Pub Date : 2020-12-14 DOI: 10.26549/met.v4i2.4299
Lunfei Li
With the rapid development of science and technology and the arrival of the information age, computer technology has also gained rapid development, and has a very wide application prospect in the current social environment. But at the same time, robots may also induce a variety of ethical problems, the existence of these ethical problems also affect the sustainable development of robots. This paper mainly aims at the change of robot application trend and related ethical issues, hoping to provide some reference for robot application and development.
随着科学技术的飞速发展和信息时代的到来,计算机技术也得到了飞速的发展,在当前的社会环境中有着非常广阔的应用前景。但与此同时,机器人也可能诱发各种伦理问题,这些伦理问题的存在也影响着机器人的可持续发展。本文主要针对机器人应用趋势的变化以及相关的伦理问题,希望能为机器人的应用和发展提供一些参考。
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引用次数: 0
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现代电子技术(英文)
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