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2021 IEEE 4th International Conference on Information Systems and Computer Aided Education (ICISCAE)最新文献

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Research on Intelligent Vocal Music Training System Based on Wavelet Transform 基于小波变换的智能声乐训练系统研究
Chen Nan
In the process of vocal music learning, most of the learning is through the traditional learning mode, that is, learning knowledge in class. For vocal music lovers who want to learn vocal music knowledge, vocal music learning has many requirements on the arrangement of learning place, time and personnel. The purpose of this paper is to develop and design an intelligent training system for vocal music. The flow of audio fingerprint extraction algorithm based on wavelet transform is to transform audio signals into spectrograms. Then, according to the characteristics that wavelet transform can better represent picture information in both time domain and frequency domain, wavelet transform is used for a series of processing of spectrograms. Finally, a more compact fingerprint is obtained by dimension reduction algorithm. This paper applies this algorithm to vocal intelligent training system for the first time. When the humming quality is high, the detection rate can reach more than 90%.
在声乐学习的过程中,大部分的学习都是通过传统的学习模式,即在课堂上学习知识。对于想要学习声乐知识的声乐爱好者来说,声乐学习对学习地点、时间和人员的安排都有很多要求。本文的目的是开发和设计一个智能的声乐训练系统。基于小波变换的音频指纹提取算法的流程是将音频信号转换成频谱图。然后,根据小波变换在时域和频域都能更好地表示图像信息的特点,利用小波变换对谱图进行一系列处理。最后,通过降维算法得到更紧凑的指纹。本文首次将该算法应用于语音智能训练系统。当嗡嗡声质量高时,检出率可达90%以上。
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引用次数: 1
Research on Virtual Exhibition System Platform of Museum Based on VR Technology 基于VR技术的博物馆虚拟展览系统平台研究
Yi Fu, G. Li
With the rapid development of information technology, mobile internet technology and the increasing popularity of intelligent terminals, the digital, networked, virtualized and mobile information age is quietly changing the way people get information, and digital museums have emerged. VR (Virtual Reality) technology is to use computer simulation to generate a three-dimensional virtual world, providing users with the simulation of visual, auditory and tactile senses. The user can observe things in three-dimensional space in time and without restriction. Traditional museum exhibition is facing the impact of new media technology, which can no longer meet the increasing demand of the audience for museums. Based on this, this paper takes VR technology to realize interactive display of virtual museum as the research content, analyzes and discusses the present situation of interactive display of virtual museum, puts forward the problem of lack of interactive display in current virtual museum display, and puts forward the idea of building a museum virtual display system platform based on VR technology.
随着信息技术、移动互联网技术的飞速发展和智能终端的日益普及,数字化、网络化、虚拟化、移动化的信息时代正在悄然改变着人们获取信息的方式,数字博物馆应运而生。VR (Virtual Reality)技术是利用计算机模拟生成三维虚拟世界,为用户提供视觉、听觉和触觉的模拟。用户可以在时间上不受限制地观察三维空间中的事物。传统的博物馆展览正面临着新媒体技术的冲击,已经不能满足观众对博物馆日益增长的需求。基于此,本文以VR技术实现虚拟博物馆交互展示为研究内容,分析探讨了虚拟博物馆交互展示的现状,提出了当前虚拟博物馆展示中缺乏交互展示的问题,并提出了构建基于VR技术的博物馆虚拟展示系统平台的思路。
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引用次数: 1
Construction of Smart City Information System Based on Cloud Computing and Internet of Things Technology 基于云计算和物联网技术的智慧城市信息系统建设
Yu Lei, Lu Zhang
Smart city is an important concept and direction of modern city development and construction. In practice, it can further improve the city's functions, and make the city's social network, infrastructure and social services realize the purpose of intelligent perception, connection and integration. Making full use of the IoT technology to strengthen the management of cities can significantly improve the management level of cities and meet people's requirements for urban service functions to the maximum extent. In this paper, combined with the IoT technology and the characteristics of smart cities, the specific application and application difficulties of IoT technology in the development of smart cities are analyzed. On this basis, cloud computing and IoT technology are scientifically used to construct smart city information systems, and IoT technology is applied to all aspects of smart city construction.
智慧城市是现代城市发展建设的重要理念和方向。在实践中,它可以进一步完善城市的功能,使城市的社会网络、基础设施和社会服务实现智能感知、连接和融合的目的。充分利用物联网技术加强对城市的管理,可以显著提高城市的管理水平,最大限度地满足人们对城市服务功能的需求。本文结合物联网技术和智慧城市的特点,分析物联网技术在智慧城市发展中的具体应用和应用难点。在此基础上,科学运用云计算和物联网技术构建智慧城市信息系统,将物联网技术应用于智慧城市建设的方方面面。
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引用次数: 2
Research on the Analysis Method of Combat Test System of Systems for Capability Generation 能力生成系统作战试验系统分析方法研究
Yanfeng Wang, Weiping Wang, Mu Lin, Tao Wang, Yifan Zhu, Yingying Zhu, Yuan Tan, Ping Liu, Xiaowei Wang
In the context of system of systems operations under joint multi-service conditions, all major military powers are focusing on system of systems capability generation. As an important part of capability generation, combat testing needs to be considered and studied from the perspective of capability and system. This paper attempts to build an integrated research method from capability requirement sources, capability requirement analysis, resource capability modeling, system design, and test verification, aiming to provide theoretical exploration and means support for the field of combat testing.
在多军种联合条件下的“系统中的系统”作战背景下,各主要军事大国都在关注“系统中的系统”能力的产生。作战测试作为能力生成的重要组成部分,需要从能力和系统的角度来考虑和研究。本文试图从能力需求来源、能力需求分析、资源能力建模、系统设计、试验验证等方面构建综合研究方法,旨在为作战测试领域提供理论探索和手段支撑。
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引用次数: 1
Research on English Classroom Teaching System Based on K-means Clustering Algorithm in Modern Information Technology Environment 现代信息技术环境下基于k -均值聚类算法的英语课堂教学系统研究
Junlin Yu
The classroom teaching concept of modern information technology has become a new direction of college English teaching reform in China. At present, under the information technology environment, China's college English teaching reform is facing new opportunities and challenges. In this paper, according to the actual situation and development trend in English classroom teaching, Struts framework technology is used to design and implement the system. According to the general specification of software engineering design, a set of English classroom teaching assistant system is designed and implemented, and requirements analysis, overall design, database design and source code are given. This paper mainly introduces the classical K-means algorithm, and establishes a teaching video retrieval model based on text clustering. In this model, the video text is used as the index to search and optimize the search results, and the search results are optimized and classified. This system can well adapt to the actual characteristics of English open teaching and meet the needs of auxiliary functions in English teaching.
现代信息技术课堂教学理念已成为中国大学英语教学改革的新方向。当前,在信息技术环境下,中国大学英语教学改革面临着新的机遇和挑战。本文根据英语课堂教学的实际情况和发展趋势,采用Struts框架技术进行系统的设计和实现。根据软件工程设计的通用规范,设计并实现了一套英语课堂教学辅助系统,给出了需求分析、总体设计、数据库设计和源代码。本文主要介绍了经典的K-means算法,建立了基于文本聚类的教学视频检索模型。该模型以视频文本为索引对搜索结果进行搜索和优化,并对搜索结果进行优化和分类。该系统能够很好地适应英语开放教学的实际特点,满足英语教学中辅助功能的需要。
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引用次数: 0
A credible transfer method of cross-chain assets based on DID and VC 基于DID和VC的可信跨链资产转移方法
Xiaoyi Wang, Weiwei Qiu, L. Zeng, Hongkai Wang, Yiyang Yao, Dong He
The distributed network structure of blockchain coincides with the market-oriented structure of distributed renewable energy. Blockchain technology can be used to synchronize the real-time price of grid services with real-time phasor control systems to balance microgrid operation, distributed power generation system access, and wholesale market operation. Distributed shared energy networks constructed in different regions and regions carry digital assets of different values. How to realize the credible exchange of energy digital assets across regions is an urgent need facing the current energy interconnection network. At present, there have been many researches on cross-chain asset exchange methods in the blockchain, such as: hash time lock, notary, side chain and so on. However, these asset exchange methods lack proper supervision (KYC&AML) and are inefficient. This article combines distributed digital identities (hereinafter referred to as DID) and verifiable credentials (VC) to propose a DID-based trusted cross-chain asset transfer method.
区块链的分布式网络结构与分布式可再生能源的市场化结构不期而遇。区块链技术可以将电网服务的实时价格与实时相量控制系统同步,实现微网运行、分布式发电系统接入和批发市场运行的平衡。构建在不同区域、不同地域的分布式共享能源网络,承载着不同价值的数字资产。如何实现能源数字资产的跨区域可信交换,是当前能源互联网络面临的迫切需要。目前,区块链中已经有很多关于跨链资产交换方式的研究,如:哈希时间锁、公证、侧链等。然而,这些资产交换方式缺乏适当的监管(KYC&AML),效率低下。本文将分布式数字身份(以下简称DID)与可验证凭证(VC)相结合,提出了一种基于DID的可信跨链资产转移方法。
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引用次数: 1
ZeroMat: Solving Cold-start Problem of Recommender System with No Input Data ZeroMat:解决无输入数据的推荐系统冷启动问题
Hao Wang
Recommender system is an applicable technique in most E-commerce commercial product technical designs. However, nearly all recommender system faces a challenge called the cold-start problem. The problem is so notorious that almost every industrial practitioner needs to resolve this issue when building recommender systems. Most cold-start problem solvers need some kind of data input as the starter of the system. On the other hand, many real-world applications place popular items or random items as recommendation results. In this paper, we propose a new technique called ZeroMat that requries no input data at all and predicts the user item rating data that is competitive in Mean Absolute Error and fairness metric compared with the classic matrix factorization with affluent data, and much better performance than random placement.
推荐系统是大多数电子商务商业产品技术设计中应用的技术。然而,几乎所有的推荐系统都面临着冷启动问题。这个问题是如此臭名昭著,以至于几乎每个行业从业者在构建推荐系统时都需要解决这个问题。大多数冷启动问题解决者需要某种类型的数据输入作为系统的启动器。另一方面,许多现实世界的应用程序将流行项目或随机项目作为推荐结果。在本文中,我们提出了一种新的ZeroMat技术,它完全不需要输入数据,并且与具有丰富数据的经典矩阵分解相比,在平均绝对误差和公平度量方面具有竞争力,并且比随机放置的性能要好得多。
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引用次数: 15
Application of Predictive PI and Multiple Cascade Control in Ordering-cylinder 预测PI和多串级控制在有序缸中的应用
Juchen Hong, Zhiping Fan, Zhengyun Ren
For the purpose of improving the stability of outlet temperature and the rapidness of temperature control system, a multi-cascade control scheme is designed based on the relationship between circulating wind and tobacco leaf temperature through the analysis of actual sampling values. The scheme adopts a three closed-loop strategy, the system model was identified by correlation analysis and the least square method, the inner and outer loop sub-controllers and the main controllers all use the predictive PI(Proportion Integration) controller. The simulation and practical application results show that comparing to the double cascade control, the multi-cascade control can effectively improve the response speed of the system, and the dynamic performance of the system. Among them, this scheme reduces the rise time by 40.4 % compared with the double-closed loop cascading system. The adverse effect of interference on the main circuit is further reduced by adding secondary circuit. Predictive PI algorithm may alleviate the large time delay of temperature control, and has good anti-interference and robustness. The overshoot after adding disturbance is only 86.3 % of the control system using fuzzy controller. This solution may provide support for accurately and stably controlling the outlet temperature of the ordering-cylinder.
为了提高出口温度的稳定性和温度控制系统的快速性,通过对实际采样值的分析,根据循环风与烟叶温度的关系,设计了多串级控制方案。该方案采用三闭环策略,通过相关分析和最小二乘法对系统模型进行辨识,内外环子控制器和主控制器均采用预测PI(比例积分)控制器。仿真和实际应用结果表明,与双串级控制相比,多串级控制能有效地提高系统的响应速度,改善系统的动态性能。其中,与双闭环级联系统相比,该方案的上升时间缩短了40.4%。通过增加次级电路,进一步减小了干扰对主电路的不利影响。预测PI算法可以缓解温度控制的大时延,具有良好的抗干扰性和鲁棒性。加入扰动后的超调量仅为模糊控制器控制系统的86.3%。该方案可为准确、稳定地控制定货筒出口温度提供支持。
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引用次数: 0
Structure optimization design of high frequency dynamic test instrument 高频动态测试仪结构优化设计
Linxuan Zhou, Yinglong Zhao, Anbin Yu, Ben Zhang
Vibration isolator is widely used in aerospace, vehicle, ship and other industries, its dynamic stiffness, impedance and other dynamic performance are its core parameters. A large number of test instruments have been developed for dynamic performance test of vibration isolators, but they are usually aimed at low frequency, light load and simple structure of vibration isolators. For vibration isolators with different characteristics, it is usually necessary to carry out specific structural design for their test instruments to avoid resonance and other safety problems during the test. In this paper, the structure design of dynamic performance test instrument for a certain type of high frequency vibration isolator was carried out. Based on the modal analysis of finite element simulation, the beam, column and foundation of the test instrument were optimized. And the variation law of its natural frequency was summarized. The simulation results showed that the optimized test instrument could meet the safety requirements. Its natural frequency was above 1000Hz, which could be used for the next step of production and manufacturing. This study also provided guidance for the structural design of the high frequency dynamic test instrument.
隔振器广泛应用于航空航天、车辆、船舶等行业,其动刚度、阻抗等动态性能是其核心参数。目前已经开发了大量的隔振器动态性能测试仪器,但它们通常针对隔振器的低频、轻载荷和结构简单。对于不同特性的隔振器,通常需要对其测试仪器进行具体的结构设计,以避免在测试过程中出现共振等安全问题。本文对某型高频隔振器动态性能测试仪进行了结构设计。在有限元模拟模态分析的基础上,对试验装置的梁、柱、基础进行了优化设计。总结了其固有频率的变化规律。仿真结果表明,优化后的测试仪器能够满足安全要求。其固有频率在1000Hz以上,可用于下一步的生产制造。该研究也为高频动态测试仪的结构设计提供了指导。
{"title":"Structure optimization design of high frequency dynamic test instrument","authors":"Linxuan Zhou, Yinglong Zhao, Anbin Yu, Ben Zhang","doi":"10.1109/ICISCAE52414.2021.9590821","DOIUrl":"https://doi.org/10.1109/ICISCAE52414.2021.9590821","url":null,"abstract":"Vibration isolator is widely used in aerospace, vehicle, ship and other industries, its dynamic stiffness, impedance and other dynamic performance are its core parameters. A large number of test instruments have been developed for dynamic performance test of vibration isolators, but they are usually aimed at low frequency, light load and simple structure of vibration isolators. For vibration isolators with different characteristics, it is usually necessary to carry out specific structural design for their test instruments to avoid resonance and other safety problems during the test. In this paper, the structure design of dynamic performance test instrument for a certain type of high frequency vibration isolator was carried out. Based on the modal analysis of finite element simulation, the beam, column and foundation of the test instrument were optimized. And the variation law of its natural frequency was summarized. The simulation results showed that the optimized test instrument could meet the safety requirements. Its natural frequency was above 1000Hz, which could be used for the next step of production and manufacturing. This study also provided guidance for the structural design of the high frequency dynamic test instrument.","PeriodicalId":121049,"journal":{"name":"2021 IEEE 4th International Conference on Information Systems and Computer Aided Education (ICISCAE)","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121579711","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
Single Base Station Positioning for Robots Based on Multiple Sensor Fusion 基于多传感器融合的机器人单基站定位
Yuanhao Ding, Lurong Jiang, Jiang Wu, Meng Li, Liwen Jing, Wei Li
With the development of technology, positioning systems have shifted from outdoor to indoor and from low precision to high precision. The indoor positioning has put forward greater demands on many applications including indoor robot navigation. Aiming at improving the accuracy, cost, and stability of indoor localization, this paper proposed a single base station positioning approach for robots based on the fusion of UWB, IMU, and encoder sensors. With the combination of several sensors, robots that carry UWB tags can achieve high accuracy localization and well robustness in an indoor environment. It has been validated in indoor corridors and passages. Compared with traditional multi-base station positioning methods, the approach which we proposed cuts the positioning cost and improves flexibility. Experiments are carried out to validate the localization performance. The results confirm that the average positioning errors can meet requirements in most indoor scenes.
随着技术的发展,定位系统已经从室外转向室内,从低精度转向高精度。室内定位对包括室内机器人导航在内的许多应用提出了更高的要求。为了提高室内定位的精度、成本和稳定性,本文提出了一种基于超宽带、IMU和编码器传感器融合的机器人单基站定位方法。通过多个传感器的组合,携带超宽带标签的机器人可以在室内环境中实现高精度定位和良好的鲁棒性。它已在室内走廊和通道中得到验证。与传统的多基站定位方法相比,该方法降低了定位成本,提高了定位的灵活性。通过实验验证了定位性能。结果表明,在大多数室内场景下,平均定位误差可以满足要求。
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引用次数: 1
期刊
2021 IEEE 4th International Conference on Information Systems and Computer Aided Education (ICISCAE)
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