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2021 IEEE/ACIS 20th International Fall Conference on Computer and Information Science (ICIS Fall)最新文献

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Research on Fault Diagnosis Model of Convolutional Neural Network Based on Signal Decomposition 基于信号分解的卷积神经网络故障诊断模型研究
Sen Wang, Peng Li, Wei-hua Niu
The complex equipment such as aeroengines has a complicated internal structure. Due to long-term exposure to extremely harsh external environmental conditions such as temperature and pressure, aeroengines often have various forms of failure, which seriously affect the normal flight of the aircraft. It is difficult for traditional models to extract accurate fault information from complex vibration signals, which increases the difficulty of troubleshooting for aircraft engines. Aiming at this problem, a fault diagnosis model using the combination of variational mode decomposition and convolutional neural network is proposed. First, the original signal is decomposed by variational mode decomposition, and then the decomposed signal is reconstructed into a two-dimensional characteristic matrix. Finally, the reconstructed matrix is used as the input of the convolutional neural network to realize the classification of typical failure modes. Compared with the traditional method, this method can extract the internal fault characteristics of the vibration signal better, and the fault recognition accuracy rate is higher.
航空发动机等复杂设备内部结构复杂。航空发动机由于长期暴露在温度、压力等极其恶劣的外部环境条件下,往往会出现各种形式的故障,严重影响飞机的正常飞行。传统模型难以从复杂的振动信号中提取准确的故障信息,增加了飞机发动机故障排除的难度。针对这一问题,提出了一种将变分模态分解与卷积神经网络相结合的故障诊断模型。首先对原始信号进行变分模态分解,然后将分解后的信号重构为二维特征矩阵。最后,将重构矩阵作为卷积神经网络的输入,实现典型失效模式的分类。与传统方法相比,该方法能更好地提取振动信号的内部故障特征,故障识别准确率更高。
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引用次数: 0
Multi-level Modeling and Cooperation Mechanisms of Tasks for Swarm Intelligent Systems 群智能系统任务的多层次建模与协作机制
Peng Li, Wenwen Fu, Hongjun You, Yuxi Liu, Zhihao Wu, Ran Qu, Yahui Li, Kailong Zhang
Cooperation is an obvious intelligence feature for Swarm Intelligent Systems (SIS), and where, autonomous task cooperation is one of the core issues for such systems that run in complicated environments, such as factories and aerospace. Focusing on this topic, the mechanisms for modeling and coordinating tasks are deeply studied in this article. After analyzing typical features of task cooperation, a hierarchical architecture of task models is firstly proposed and established, where mission, sub-mission and atom task models are designed, from the top-level to the bottom. Meanwhile, a policy-based parsing mechanism is proposed to autonomously decompose a mission into a set of atom tasks with special constraints. On this basis, resource related entities for various atom tasks are designed uniformly, and for the purpose of behavior synchronization, the concept of virtual logic task is further introduced and Topic-based communication channel is adopted over DDS middleware. Finally, a typical example is given and analyzed. In general, this work provides a feasible idea and method for constructing cooperative swarm intelligent systems.
协作是集群智能系统(Swarm Intelligent system, SIS)的一个明显的智能特征,而自主任务协作是集群智能系统在工厂、航天等复杂环境下运行的核心问题之一。围绕这一主题,本文深入研究了任务的建模和协调机制。在分析了任务协作的典型特征后,首先提出并建立了任务模型的层次结构,从上到下分别设计了任务模型、提交任务模型和原子任务模型。同时,提出了一种基于策略的解析机制,将任务自主分解为一组具有特殊约束的原子任务。在此基础上,统一设计了各种原子任务的资源相关实体,为实现行为同步,进一步引入了虚拟逻辑任务的概念,并在DDS中间件上采用了基于topic的通信通道。最后给出了一个典型实例并进行了分析。总的来说,本研究为构建协同群智能系统提供了一种可行的思路和方法。
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引用次数: 0
A Distributed Obstacle Avoidance Method for Swarm UAVs based on Behavioral Approach and Route Planning 基于行为方法和路径规划的群无人机分布式避障方法
Haixiang Wang, Pencheng Wen, L. Bai
In this paper, we study the obstacle avoidance method of swarm UAVs. This method is used to avoid the longtime split of the formation when the swarm passes through the obstacle area. A control method of the dense formation is designed based on the behavioral approach with the constraints of formation boundary. This distributed method just needs each UAV to communicate with neighboring individuals of the swarm. A new route planning method based on Particle Swarm Optimization (PSO) algorithm is proposed to plan a safe and flyable route matching the formation width for swarm UAVs in the area with obstacles. The planned route serves as the consensus information of the swarm, which is equivalent to a virtual UAV. During avoiding obstacles, swarm UAVs are treated as a whole, and the swarm forms a dense formation by following the planned route. Simulation results are presented to demonstrate the effectiveness and rationality of the proposed method.
本文研究了群无人机的避障方法。该方法可避免蜂群通过障碍物区域时长时间的队形分裂。基于行为方法,在地层边界约束下设计了一种致密地层控制方法。这种分布式方法只需要每架无人机与邻近的蜂群进行通信。提出了一种基于粒子群优化(PSO)算法的航路规划新方法,为群无人机在障碍物区域规划一条与编队宽度相匹配的安全可飞航路。规划的路线作为蜂群的共识信息,相当于一个虚拟的无人机。在避障过程中,蜂群无人机被视为一个整体,按照规划的路线形成密集编队。仿真结果验证了该方法的有效性和合理性。
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引用次数: 0
Research on Chinese Sentiment Analysis Based on Bi-LSTM Networks 基于Bi-LSTM网络的汉语情感分析研究
Taozheng Zhang, Jiaqi Guo
Chinese sentiment analysis is a very important branch of natural language processing. It has been receiving much attention in recent years. The bidirectional long and short-term memory network (Bi-LSTM) model has been well applied in the field of sentiment analysis because of its own characteristics. This experiment hopes to further explore the performance and application of the Bi-LSTM model in sentiment analysis. There are three main steps in the experiment. First, the collected Chinese reviews are segmented and vectorized. Then, the Bi-LSTM is trained and tested. Finally, the sentiment analysis result is obtained. With the help of the hyper-parameter adjustment and the dropout mechanism, the evaluation indicators of the experimental model have reached about 89%. What's more, based on the same experimental environment and experimental data, this experiment tested the accuracy of CNN, LSTM, CNN_LSTM, and Bi-LSTM. In addition, the trained Bi-LSTM was used to analyze reviews from Taobao and JD.COM. The specific operation is to collect reviews on a certain product from Taobao and JD.COM to perform a specific analysis with the model. Then find the advantages and disadvantages of the model in practical applications, so that the model can continue to be improved.
汉语情感分析是自然语言处理的一个重要分支。近年来,它一直受到广泛关注。双向长短期记忆网络(Bi-LSTM)模型以其自身的特点在情感分析领域得到了很好的应用。本实验希望进一步探索Bi-LSTM模型在情感分析中的性能和应用。实验中有三个主要步骤。首先,对收集到的中文评论进行分割和矢量化。然后,对Bi-LSTM进行训练和测试。最后,得到情感分析结果。借助超参数调整和dropout机制,实验模型的评价指标达到89%左右。此外,在相同的实验环境和实验数据的基础上,本实验测试了CNN、LSTM、CNN_LSTM和Bi-LSTM的准确率。此外,训练后的Bi-LSTM用于分析淘宝和京东的评论。具体操作是在淘宝和京东上收集某一产品的评论,用模型进行具体分析。然后在实际应用中找到模型的优缺点,使模型能够不断得到完善。
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引用次数: 1
Design of Controller for Laser Semi-Active Proportional Navigation Device Based on LQG/LTR 基于LQG/LTR的激光半主动比例导航装置控制器设计
Jun Zhao, Changyu Wang, T. Ai, Yanfei Huang, Gang Zhao
Aiming at the demand of improving anti-interference and real-time performance of a new type laser semiactive four-quadrant proportional guidance device, this paper proposes a controller architecture based on ARM+FPGA which improves the real-time performance and complex code pattern detection ability of the system by increasing the co-processing ability, and adopts LQG/LTR algorithm to design the control strategy of the servo tracking system to improve the fast and stable tracking ability and robustness. The experimental results show that the pulse acquisition accuracy of the system reaches 30ns, the analog acquisition synchronization accuracy reaches 13ns, the analog acquisition accuracy reaches 0.3%, the gain control response time is less than 3.77 ms, and the pseudorandom code recognition delay is less than 100ms, which effectively improves the real-time performance and robustness of the laser semi-active proportional guidance device.
针对提高新型激光半主动四象限比例制导装置抗干扰性和实时性的需求,提出了一种基于ARM+FPGA的控制器架构,通过增加协同处理能力,提高了系统的实时性和复杂码型检测能力。采用LQG/LTR算法设计伺服跟踪系统的控制策略,提高了伺服跟踪系统的快速稳定跟踪能力和鲁棒性。实验结果表明,该系统的脉冲采集精度达到30ns,模拟采集同步精度达到13ns,模拟采集精度达到0.3%,增益控制响应时间小于3.77 ms,伪随机码识别延迟小于100ms,有效提高了激光半主动比例制导装置的实时性和鲁棒性。
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引用次数: 0
Experiences in Developing and Testing BBC Micro: bit Games in a K-12 Coding Club during the COVID-19 Pandemic 新冠疫情期间在K-12编码俱乐部开发和测试BBC Micro: bit游戏的经验
M. Garcia-Ruiz, O. Alvarez-Cardenas, A. Iñiguez-Carrillo
The COVID-19 pandemic has changed the traditional teaching and learning process, moving students' educational hands-on activities carried out in the classroom to home activities that include the use of online tools. Here we describe an after-class online coding club conducted for a month, where elementary (primary) school students programmed and tested games running on the BBC Micro: bit microcontroller board. By developing gaming mini-projects, the students learned computing topics such as logic, sensors, random number generation, game development and programming, and how small physical computing mini-projects were conducted. In this paper, we describe how students and an instructor developed and tested games made for the Micro: bit, running an online simulator and physically using the Micro: bit at home. The paper shows lessons learned on developing games with the BBC Micro: bit in the coding club, and challenges that students encountered in the game development with the BBC Micro: bit. Future work includes multisensory educational gaming projects with the BBC Micro: bit.
2019冠状病毒病大流行改变了传统的教学过程,将学生在课堂上进行的教育实践活动转移到家庭活动,包括使用在线工具。在这里,我们描述了一个为期一个月的课外在线编程俱乐部,小学生在BBC Micro: bit微控制器板上编程和测试游戏。通过开发游戏小项目,学生们学习了逻辑、传感器、随机数生成、游戏开发和编程等计算主题,以及如何进行小型物理计算小项目。在本文中,我们描述了学生和教师如何开发和测试为Micro: bit制作的游戏,运行在线模拟器和在家实际使用Micro: bit。本文展示了在编程俱乐部中使用BBC Micro: bit开发游戏的经验教训,以及学生在使用BBC Micro: bit开发游戏时遇到的挑战。未来的工作包括与BBC Micro: bit合作的多感官教育游戏项目。
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引用次数: 5
Personalized Semantic Retrieval System based on Statistical Language Model 基于统计语言模型的个性化语义检索系统
Xianghao Meng, Dongmei Li, Qichen Han
The semantic relationship in thesaurus is introduced into the current network information retrieval tool, which can realize semantic retrieval. Using a statistical language model to express query statements and return results in the form of probability distribution can more effectively complete the construction of user model and realize personalized retrieval. Firstly, this paper proposes a similarity calculation method based on the relationship between words in the thesaurus. On the basis of this method, combined with the idea of query expansion and weighted sorting, this paper proposes a semantic retrieval method of forestry information based on the thesaurus. Secondly, this paper uses a statistical language model to propose personalized retrieval methods based on three different user models: topic model, historical model and mixed model. Finally, a forestry information personalized semantic retrieval system is realized by using semantic retrieval and personalized retrieval method. Experimental results indicate that the proposed personalized semantic retrieval method can effectively improve the retrieval performance.
将同义词库中的语义关系引入到现有的网络信息检索工具中,实现语义检索。使用统计语言模型来表达查询语句,并以概率分布的形式返回结果,可以更有效地完成用户模型的构建,实现个性化检索。首先,本文提出了一种基于词库中词间关系的相似度计算方法。在此基础上,结合查询扩展和加权排序的思想,提出了一种基于词库的林业信息语义检索方法。其次,利用统计语言模型提出了基于主题模型、历史模型和混合模型三种不同用户模型的个性化检索方法。最后,利用语义检索和个性化检索方法,实现了林业信息个性化语义检索系统。实验结果表明,提出的个性化语义检索方法能有效提高检索性能。
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引用次数: 0
High-Reliability Design Methods of the 1553B Bus Communication Software for Manned Spacecraft 载人飞船1553B总线通信软件的高可靠性设计方法
Yan Qi, Li Huachun, He Yifeng
High reliability is a key feature of the manned spacecraft's 1553B bus communication software, and it is the basis for the normal operation of the manned spacecraft's electronic system. To realize the high reliability of the 1553B bus communication software, five robust design methods, named “optimized initialization procedure”, “complete initialization action”, “reasonable data response modes”, “correct data access steps” and “defensive illegal data measures”, are proposed. These methods are applicable to a variety of manned spacecraft and can greatly improve the stability and reliability of the on-board electronic systems.
高可靠性是载人飞船1553B总线通信软件的关键特点,是载人飞船电子系统正常运行的基础。为实现1553B总线通信软件的高可靠性,提出了“优化初始化程序”、“完整初始化动作”、“合理的数据响应方式”、“正确的数据访问步骤”和“防御性非法数据措施”五种稳健设计方法。这些方法适用于各种载人航天器,可以大大提高机载电子系统的稳定性和可靠性。
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引用次数: 0
The COVID-19 Question Answering System Based on Knowledge Graph 基于知识图谱的COVID-19问答系统
Yuze Sun, Yifei Cai, Yunkai Shen, Qian-cai Zhang, Xiaolong Feng, Mengmeng Yin, Dongmei Li
The COVID-19 that emerged at the end of 2019 is the biggest public health emergency encountered by human in the past 100 years. In the face of COVID-19, people need to get correct, comprehensive and clear information. However, traditional information retrieval methods only return a collection of related web pages, and users need to distinguish the authenticity from redundant and complicated information. Therefore, such information acquisition methods are inefficient and cannot serve users well. To meet the needs of users for related information, it is necessary to study the question answering system for the COVID-19. This paper studies and builds a COVID-19 question answering system based on knowledge graph. In the System, the question answering function is realized by template matching, which based on the Naive Bayes algorithm. For the input questions, the system firstly performs entity recognition, using entity type labeling combined with entity similarity matching to identify entities in the user's questions. Then the system predicts the user's question intention and use the trained question classifier to predict the category number. Finally Cypher is utilized to query graph database to generate and output the answer. The system implemented in this paper can help users quickly obtain the information they want and improve the user's information acquisition efficiency. The system can provide people convenient and fast ways of obtaining information about COVID-19, such as medical treatment, health, materials, prevention and control, scientific research, so as to help people take precautions against diseases and decrease the incidence of COVID-19.
2019年底出现的新冠肺炎疫情是近百年来人类遭遇的最严重的突发公共卫生事件。面对新冠肺炎疫情,人们需要获得正确、全面、清晰的信息。然而,传统的信息检索方法只返回相关网页的集合,用户需要区分冗余和复杂信息的真实性。因此,这种信息获取方式效率低下,不能很好地为用户服务。为满足用户对相关信息的需求,有必要对新型冠状病毒肺炎问答系统进行研究。本文研究并构建了一个基于知识图谱的COVID-19问答系统。在系统中,问答功能是基于朴素贝叶斯算法的模板匹配实现的。对于输入的问题,系统首先进行实体识别,使用实体类型标注结合实体相似度匹配来识别用户问题中的实体。然后,系统预测用户的提问意图,并使用训练好的问题分类器预测类别数。最后利用Cypher对图形数据库进行查询,生成并输出答案。本文实现的系统可以帮助用户快速获取自己想要的信息,提高用户的信息获取效率。该系统可以为人们提供方便快捷的获取COVID-19医疗、卫生、物资、防控、科研等信息的途径,帮助人们做好预防疾病的工作,降低COVID-19的发病率。
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引用次数: 1
RO-TextCNN Based MUL-MOVE-Net for Camera Motion Classification 基于RO-TextCNN的multi - move - net摄像机运动分类
Zeyu Chen, Yana Zhang, Lianyi Zhang, Cheng Yang
Video auto-editing is a new application of artificial intelligence technology in the media industry. Camera motion is one of the critical characteristics of videos and is vital for shot arrangement. Rules based camera motion classification algorithms generalize poorly from one dataset to another. Machine learning or deep learning based algorithms have better cross-task performance. However, in order to remove the motion information in the foreground area, researchers have to use semantic segmentation neural networks that are computationally expensive. Existing foreground segmentation algorithms are only effective for samples with clear foreground areas. The salient areas generated by the saliency segmentation algorithms are not the same as the foreground areas in many cases. This paper proposes a novel deep learning based camera motion classification framework MUL-MOVE-Net, which is composed of multiple instantaneous motion networks MOVE-Net. In MOVE-Net, a lightweight RO- TextCNN module is proposed to learn multi-scale templates in the 1D angle histogram of optical flow information. Without using semantic segmentation network, the algorithm is capable of foreground fault tolerance while ensuring efficiency. For the experiments, a dataset MOVE-SET is constructed with more than 100, 000 pairs of instantaneous camera motion samples. On the testing set, our algorithm achieves an accuracy of 95.3% and a Macro-F1 value of 0.9385. In the shot-level motion classification task, the accuracy of MUL-MOVE-Net gets 4% higher than that of SGNet, and Macro-F1 0.3 higher. As a result, MUL-MOVE-Net could efficiently classify the camera motion in real time and is helpful for video auto-editing.
视频自动编辑是人工智能技术在媒体行业的新应用。摄像机的运动是视频的重要特征之一,对镜头的安排至关重要。基于规则的摄像机运动分类算法在不同数据集之间泛化能力较差。机器学习或基于深度学习的算法具有更好的跨任务性能。然而,为了去除前景区域的运动信息,研究人员不得不使用语义分割神经网络,这在计算上是昂贵的。现有的前景分割算法仅对前景区域清晰的样本有效。在许多情况下,显著性分割算法生成的显著区域与前景区域并不相同。本文提出了一种新的基于深度学习的摄像机运动分类框架mu -MOVE-Net,该框架由多个瞬时运动网络MOVE-Net组成。在MOVE-Net中,提出了一种轻量级的RO- TextCNN模块来学习光流信息一维角度直方图中的多尺度模板。该算法在不使用语义分割网络的情况下,在保证效率的同时具有前台容错能力。在实验中,使用超过10万对瞬时相机运动样本构建了MOVE-SET数据集。在测试集上,我们的算法准确率达到95.3%,Macro-F1值为0.9385。在镜头级运动分类任务中,mull - move - net的准确率比SGNet高4%,Macro-F1高0.3。结果表明,multi - move - net能够有效地对摄像机运动进行实时分类,有利于视频的自动编辑。
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引用次数: 1
期刊
2021 IEEE/ACIS 20th International Fall Conference on Computer and Information Science (ICIS Fall)
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