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2018 10th International Conference on Communications, Circuits and Systems (ICCCAS)最新文献

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An attempt to utilize LoRa for Intersatellite Communications 利用LoRa进行卫星间通信的尝试
Pub Date : 2018-12-01 DOI: 10.1109/ICCCAS.2018.8769213
Zhang Xuan, Zhang Xiaojie, Wang Shuo, Z. Ye
As individual satellite is limited by the mass and power constraints, formation or clusters contributing to the improved spatial and temporal resolution could be very useful in missions for space data collection or observation. Formation requires accurate orbital control for the system, while a cluster of spacecraft only requires cooperative control avoiding collision. Inter-satellite communication becomes critical for missions involving multiple satellites. As a solution for the Low–Power, Wide-Area Networks (LPWAN), LoRa technology is available for long-range and low-power communication in Internet of Things (IoT) areas. The purpose of this study is to take advantage of the LoRa technology to support autonomous operations with minimal human intervention in a wireless sensor network (WSN) building by a cluster of satellites. The paper will give an attempt to transplant IoT technology to space. We will design a typical space scenario for WSN and analyze the communication and topology requirement for its space application. Specific modification will be taken for the implementation of terrestrial IoT technology LoRa in the space cluster.
由于单个卫星受到质量和功率限制,因此有助于提高空间和时间分辨率的编队或星群在空间数据收集或观测任务中可能非常有用。编队需要对系统进行精确的轨道控制,而航天器群只需要协同控制以避免碰撞。卫星间通信对于涉及多颗卫星的任务至关重要。LoRa技术作为低功耗广域网(LPWAN)的解决方案,可用于物联网(IoT)领域的远程和低功耗通信。本研究的目的是利用LoRa技术,在由卫星群构建的无线传感器网络(WSN)中,以最少的人为干预支持自主操作。本文将尝试将物联网技术移植到太空。设计一个典型的无线传感器网络空间场景,分析其空间应用的通信和拓扑需求。在空间集群中实施地面物联网技术LoRa,将进行具体修改。
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引用次数: 6
A Single Channel Subspace Speech Enhancement Approach Based on Optimal Lagrange Multiplier in Time Domain Constraint 时域约束下基于最优拉格朗日乘子的单信道子空间语音增强方法
Pub Date : 2018-12-01 DOI: 10.1109/ICCCAS.2018.8769246
Jingxian Tu, Guijiang Qin
A single channel subspace speech enhancement approach based on optimal Lagrange multiplier in time domain constraint is proposed. The proposed method focuses on the time domain constraint. The inverse of the Cholesky factorization matrix of noise covariance matrix is used to prewhiten the noisy signal. In this paper, the noise suppression level is adjusted adaptively and is decreasing monotonically according to a short time signal to noise (SNR), then the optimal Lagrange multiplier is obtained by a numerical algorithm with high speed. Simulation shows that the proposed approach outperform conventional subspace methods providing high noise reduction and better speech quality in most cases.
提出了一种基于时域约束下最优拉格朗日乘子的单通道子空间语音增强方法。该方法主要关注时域约束。利用噪声协方差矩阵的Cholesky分解矩阵的逆对噪声信号进行预白。本文根据短时间信噪比自适应调整噪声抑制电平并单调递减,然后采用数值算法快速求得最优拉格朗日乘法器。仿真结果表明,该方法在大多数情况下都优于传统的子空间方法,具有较高的降噪效果和较好的语音质量。
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引用次数: 0
A Programmable Network Management Architecture for Address Driven Network 地址驱动网络的可编程网络管理体系结构
Pub Date : 2018-12-01 DOI: 10.1109/ICCCAS.2018.8768952
Ziqiang Zhou, Changqing An, Jiahai Yang
The operation and management of network is facing increasing complexities brought by the evolution of network protocols and the demands of rapid service delivery. In this paper, we propose a programmable network management architecture, which manages network based on NETCONF protocol and provides REST APIs to upper layer so that further programming can be done based on the APIs to implement flexible management. Functions of devices can be modeled based on YANG language, and the models can be translated into REST APIs. We apply it to the management of ADN (Address Driven Network), an innovative network architecture proposed by Tsinghua University to inhibit IP spoofing, improve network security and provide high service quality. We model the functions of ADN based on YANG language, and implement the network management functions based on the REST APIs. We deploy and evaluate it in a laboratory environment. Test result shows that the programmable network management architecture is flexible to implement management for new network services.
随着网络协议的不断发展和业务快速交付的需求,网络的运行和管理面临着日益复杂的问题。本文提出了一种基于NETCONF协议的可编程网络管理体系结构,该体系结构基于NETCONF协议对网络进行管理,并向上层提供REST接口,使上层可以基于这些接口进行进一步的编程,实现灵活的管理。可以基于YANG语言对设备的功能进行建模,并将模型转换为REST api。我们将其应用于ADN(地址驱动网络)的管理,ADN是清华大学提出的一种创新的网络架构,用于抑制IP欺骗,提高网络安全性和提供高服务质量。我们基于YANG语言对ADN的功能进行建模,并基于REST api实现网络管理功能。我们在实验室环境中部署和评估它。测试结果表明,该可编程网络管理体系结构能够灵活地实现对新型网络业务的管理。
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引用次数: 0
A Low-Pass Filter Design Based on Split-Ring Resonator with Defected Ground Structure 基于缺陷接地结构的分环谐振器低通滤波器设计
Pub Date : 2018-12-01 DOI: 10.1109/ICCCAS.2018.8768937
Zhu Wei-gang, Wang Pei-zhang, Liu Han
This paper explores an optimized low-pass filter which is based on the split-ring resonator (SRR) with a defected ground structure (DGS). By means of the two open stubs loaded on the main transmission line, the stop band of the filter can be expanded and the frequency selectivity of the filter can be improved. Thanks to the small size and simple construction, this type of filter can be widely applied in wireless communication fields.
本文研究了一种基于缺陷接地结构的劈裂环谐振器(SRR)的优化低通滤波器。通过负载在主传输线上的两个开路桩,可以扩大滤波器的阻带,提高滤波器的频率选择性。该滤波器体积小,结构简单,可广泛应用于无线通信领域。
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引用次数: 0
Rocket Trajectory Real-time Generation System 火箭轨迹实时生成系统
Pub Date : 2018-12-01 DOI: 10.1109/ICCCAS.2018.8768948
Yan Liu, Zhen-hua Chen, Jian Wang, Weihuai Li
In this paper, a real-time rocket trajectory generation system based on super wide-angle optical camera is designed, which maps the trajectory in real time according to the flight position of the rocket. In this paper, firstly, a video acquisition system based on wide-angle lens is designed. Then a rocket trajectory generation algorithm based on moving target detection is proposed. Finally, by designing CUDA parallel processing algorithm, the system has high-definition video real-time processing capability. Compared with the traditional rocket flight shooting mode, the system designed in this paper can preserve the trajectory of the rocket flight while shooting in real time. The system designed in this paper is a new display method for the rocket launching image of the space launching field.
本文设计了一种基于超广角光学摄像机的火箭弹道实时生成系统,根据火箭的飞行位置实时生成弹道。本文首先设计了一个基于广角镜头的视频采集系统。然后提出了一种基于运动目标检测的火箭弹道生成算法。最后,通过设计CUDA并行处理算法,使系统具有高清视频的实时处理能力。与传统的火箭飞行射击模式相比,本文设计的系统能够在实时射击时保持火箭飞行轨迹。本文设计的系统是航天发射场火箭发射图像显示的一种新方法。
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引用次数: 0
A Preconditioned Symmetric Successive Over Relaxation Method for Massive MIMO Signal Detection 海量MIMO信号检测的预条件对称逐次过松弛方法
Pub Date : 2018-12-01 DOI: 10.1109/ICCCAS.2018.8769292
Xin-yi Wang, Zhongtao Zhu, Xiaozhang Zhu
For a given massive multiple-input multiple-output (MIMO) systems, how to achieve near-optimal performance with low system complexity is crucial for practical usage. To solve this problem, a new preconditioned symmetric successive over relaxation (SSOR) for minimum mean square error (MMSE) method is introduced in this paper, and the simulation results are compared with other common approaches. The preconditioned process is based on NS method which is found to be able to produce accurate enough initial guess that can be used to improve the convergence rate in the subsequent SSOR processing. The simulation results show that the combined system is improved in convergence rate with limited affect in complexity and bit error rate (BER).
对于给定的大规模多输入多输出(MIMO)系统,如何在较低的系统复杂度下实现近乎最优的性能是实际应用的关键。为了解决这一问题,本文提出了一种新的预处理对称连续过松弛(SSOR)最小均方误差(MMSE)方法,并将仿真结果与其他常用方法进行了比较。基于NS方法的预处理过程能够产生足够精确的初始猜测,可以用于提高后续SSOR处理的收敛速度。仿真结果表明,在对系统复杂度和误码率影响有限的情况下,提高了系统的收敛速度。
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引用次数: 0
Rocket Image Classification Based on Deep Convolutional Neural Network 基于深度卷积神经网络的火箭图像分类
Pub Date : 2018-12-01 DOI: 10.1109/ICCCAS.2018.8769176
Liang Zhang, Zhen-hua Chen, Jian Wang, Zhaodun Huang
In the field of aerospace measurement and control field, optical equipment generates a large amount of image data. Thus it has great research value for how to process a huge number of images data quickly and effectively. With the development of deep learning, great progress has been made in the task of image classification. This paper attempts to classify the task images generated by optical measurement equipment using the deep learning method. Firstly, based on residual network, a general deep learning image classification framework, a binary image classification network namely rocket image and other image is built. Secondly, on the basis of the binary cross entropy loss function, the modified loss function is used to achieves a better generalization effect on those images difficult to classify. Then, the 2689 visible image data downloaded from optical equipment is randomly divided into training set, validation set and test set. The data augmentation method is used to train the binary classification model on a relatively small training set. The optimal model weight is selected according to the loss value on the validation set. Finally, the trained model achieved a 100% precision and a 83.33% recall on the test set of 97 images which include 24 rockets images. This paper has certain value for exploring the application of deep learning method in the intelligent and rapid processing of optical equipment task image in aerospace measurement and control field.
在航空航天测控领域,光学设备会产生大量的图像数据。因此,如何快速有效地处理海量图像数据具有重要的研究价值。随着深度学习的发展,在图像分类任务上取得了很大的进展。本文尝试使用深度学习方法对光学测量设备生成的任务图像进行分类。首先,基于残差网络,构建了通用深度学习图像分类框架,即火箭图像和其他图像的二值图像分类网络;其次,在二值交叉熵损失函数的基础上,利用改进的损失函数对难以分类的图像进行更好的泛化。然后,将从光学设备下载的2689张可见光图像数据随机分为训练集、验证集和测试集。采用数据增强法在较小的训练集上训练二分类模型。根据验证集上的损失值选择最优模型权重。最后,在包含24张火箭图像的97张图像的测试集上,训练模型达到了100%的准确率和83.33%的召回率。本文对于探索深度学习方法在航空航天测控领域光学设备任务图像智能快速处理中的应用具有一定的价值。
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引用次数: 3
Exploiting Semantic Structured Relationships Using Graph Models for Semantic Annotations 利用语义注释的图模型开发语义结构化关系
Pub Date : 2018-12-01 DOI: 10.1109/ICCCAS.2018.8769236
Yuhua Fan, Liya Fan
This paper proposes a novel and efficient approach to exploit semantic relationships using semantic modeling for semantic annotation tasks. The existing methods learn knowledge of concepts and their relationships based on context cues. Starting with a large set of objects detectors, the proposed method refines the initial annotation results using the learned semantic relationships, which can preserve the consistency and effective of the annotation over a semantic graph. Different from the existing graph learning methods which capture relations among data instances, the semantic graphs treat concepts as nodes and concept affinities as the weights of edges. Particularly, the proposed method can not only learn the semantic cues effectively through the semantic graph models to improve the annotation results, but also can adapt the concept affinities to unseen images. The method provides a means to handle structured relationship change between training and test data, which occurs very often in semantic annotation tasks. Our experiments on NYUv2 demonstrate that the proposed approach outperform the state-of-the-art algorithms.
本文提出了一种利用语义建模来实现语义标注任务的语义关系的新方法。现有的方法是基于上下文线索来学习概念及其关系的知识。该方法从大量的对象检测器出发,利用学习到的语义关系对初始标注结果进行细化,保持了标注在语义图上的一致性和有效性。与现有的捕获数据实例之间关系的图学习方法不同,语义图将概念作为节点,将概念亲和度作为边的权重。特别是,该方法不仅可以通过语义图模型有效地学习语义线索,提高标注效果,而且可以根据未见过的图像调整概念亲和力。该方法提供了一种处理训练数据和测试数据之间结构化关系变化的方法,这种变化在语义标注任务中经常发生。我们在NYUv2上的实验表明,所提出的方法优于最先进的算法。
{"title":"Exploiting Semantic Structured Relationships Using Graph Models for Semantic Annotations","authors":"Yuhua Fan, Liya Fan","doi":"10.1109/ICCCAS.2018.8769236","DOIUrl":"https://doi.org/10.1109/ICCCAS.2018.8769236","url":null,"abstract":"This paper proposes a novel and efficient approach to exploit semantic relationships using semantic modeling for semantic annotation tasks. The existing methods learn knowledge of concepts and their relationships based on context cues. Starting with a large set of objects detectors, the proposed method refines the initial annotation results using the learned semantic relationships, which can preserve the consistency and effective of the annotation over a semantic graph. Different from the existing graph learning methods which capture relations among data instances, the semantic graphs treat concepts as nodes and concept affinities as the weights of edges. Particularly, the proposed method can not only learn the semantic cues effectively through the semantic graph models to improve the annotation results, but also can adapt the concept affinities to unseen images. The method provides a means to handle structured relationship change between training and test data, which occurs very often in semantic annotation tasks. Our experiments on NYUv2 demonstrate that the proposed approach outperform the state-of-the-art algorithms.","PeriodicalId":166878,"journal":{"name":"2018 10th International Conference on Communications, Circuits and Systems (ICCCAS)","volume":"56 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115067848","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
A Study of the Influence of Solder Thickness on the Thermal Resistance of Power VDMOS Device Package 焊料厚度对功率VDMOS器件封装热阻影响的研究
Pub Date : 2018-12-01 DOI: 10.1109/ICCCAS.2018.8769261
Wei Gao, Yining Ma, Zhaofeng Sun, Pengfei Yin, M. Ren, Jin-ping Zhang, Zehong Li, Bo Zhang, W. Du
The thermal resistance of the power VDMOS device is an important parameter reflecting its thermal characteristics and reliability. The solder layer is one of the most important component which has a great influence on the thermal resistance. In this paper, three different power VDMOS in ITO-220 package are used as samples to analyze the relationship between the thickness of the solder layer and the thermal resistance. Through the results of finite element simulation and experiment, it is concluded that the thermal resistance is approximately linear with the thickness of solder layer.
功率VDMOS器件的热阻是反映其热特性和可靠性的重要参数。焊料层是对热阻有很大影响的重要元件之一。本文以ITO-220封装中三种不同功率的VDMOS为样品,分析了焊料层厚度与热阻之间的关系。通过有限元模拟和实验结果,得出热阻与焊料层厚度近似成线性关系的结论。
{"title":"A Study of the Influence of Solder Thickness on the Thermal Resistance of Power VDMOS Device Package","authors":"Wei Gao, Yining Ma, Zhaofeng Sun, Pengfei Yin, M. Ren, Jin-ping Zhang, Zehong Li, Bo Zhang, W. Du","doi":"10.1109/ICCCAS.2018.8769261","DOIUrl":"https://doi.org/10.1109/ICCCAS.2018.8769261","url":null,"abstract":"The thermal resistance of the power VDMOS device is an important parameter reflecting its thermal characteristics and reliability. The solder layer is one of the most important component which has a great influence on the thermal resistance. In this paper, three different power VDMOS in ITO-220 package are used as samples to analyze the relationship between the thickness of the solder layer and the thermal resistance. Through the results of finite element simulation and experiment, it is concluded that the thermal resistance is approximately linear with the thickness of solder layer.","PeriodicalId":166878,"journal":{"name":"2018 10th International Conference on Communications, Circuits and Systems (ICCCAS)","volume":"49 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134357852","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: 1
The Research on Evolutionary Hardware Evolution Algorithm for Stall Effect 失速效应的进化硬件进化算法研究
Pub Date : 2018-12-01 DOI: 10.1109/ICCCAS.2018.8768921
Guo Zhen-xing, Xu Li-zhi, Song Xue-jun, Li Chong-cun, Li Ruoyi
The fitness values increase rapidly in the early stages of circuit evolution design, while the fitness values grew slowly or stagnated, at the later stages of the evolution. The phenomenon is called the "Stalling effect" phenomenon. In response to this problem, the evolutionary redundancy repair technique of circuit evolution design is proposed. The repair module is built using the redundant nodes and activated nodes at the later of circuit evolution design. The circuit with partially correct functions is evolved using Cartesian Genetic Programming at the early stages of the algorithm. At the later stages of the algorithm, the repair modules repair the error output of minimum items, ensure the correct output of the minimum items not modified meanwhile. The target circuit obtained traditional repair techniques include the additional repair circuit modules and the partial correct circuit. The evolutionary redundancy repair technique combines the repair circuit module and the evolution circuit. The repair module is built through the redundant nodes and the activated nodes. The experiment of a three-bit multiplier is researched. The results show that the rate of convergence of evolution program is greatly accelerated.
在电路进化设计的早期阶段,适应度值增长迅速,而在进化的后期阶段,适应度值增长缓慢或停滞。这种现象被称为“失速效应”现象。针对这一问题,提出了电路进化设计的进化冗余修复技术。在电路进化设计后期,利用冗余节点和激活节点构建修复模块。在算法的早期阶段,使用笛卡尔遗传规划来进化具有部分正确功能的电路。在算法后期,修复模块对最小项的错误输出进行修复,同时保证最小项的正确输出不被修改。传统修复技术得到的目标电路包括附加修复电路模块和部分校正电路。进化冗余修复技术将修复电路模块与进化电路相结合。修复模块通过冗余节点和激活节点构建。研究了一种三比特乘法器的实验。结果表明,进化程序的收敛速度大大加快。
{"title":"The Research on Evolutionary Hardware Evolution Algorithm for Stall Effect","authors":"Guo Zhen-xing, Xu Li-zhi, Song Xue-jun, Li Chong-cun, Li Ruoyi","doi":"10.1109/ICCCAS.2018.8768921","DOIUrl":"https://doi.org/10.1109/ICCCAS.2018.8768921","url":null,"abstract":"The fitness values increase rapidly in the early stages of circuit evolution design, while the fitness values grew slowly or stagnated, at the later stages of the evolution. The phenomenon is called the \"Stalling effect\" phenomenon. In response to this problem, the evolutionary redundancy repair technique of circuit evolution design is proposed. The repair module is built using the redundant nodes and activated nodes at the later of circuit evolution design. The circuit with partially correct functions is evolved using Cartesian Genetic Programming at the early stages of the algorithm. At the later stages of the algorithm, the repair modules repair the error output of minimum items, ensure the correct output of the minimum items not modified meanwhile. The target circuit obtained traditional repair techniques include the additional repair circuit modules and the partial correct circuit. The evolutionary redundancy repair technique combines the repair circuit module and the evolution circuit. The repair module is built through the redundant nodes and the activated nodes. The experiment of a three-bit multiplier is researched. The results show that the rate of convergence of evolution program is greatly accelerated.","PeriodicalId":166878,"journal":{"name":"2018 10th International Conference on Communications, Circuits and Systems (ICCCAS)","volume":"57 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116469288","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
2018 10th International Conference on Communications, Circuits and Systems (ICCCAS)
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