首页 > 最新文献

2016 International Conference on Computer, Information and Telecommunication Systems (CITS)最新文献

英文 中文
An improved indoor localization based on RSSI and feedback correction of anchor node for WSN 基于RSSI和锚节点反馈校正的WSN室内定位改进方法
Xiao-chao Dang, Yili Hei, Zhanjun Hao
Received signal strength indicator (RSSI)-based localization attracting a great deal of research interest since it requires a relatively low configuration, battery power and easy control. However, the indoor localization algorithm based on RSSI is easy to be influenced by the channel interference and the environment. In this paper, a novel method is presented for improving the accuracy of indoor localization, which is based on anchor node feedback correction. First, the whole environment is divided before positioning, after the minimum location area is determined, the model parameters of the path loss in the region are estimated, then the distance between nodes is calculated accurately, and the feedback of neighbor anchor nodes is used to improve the accuracy further. The simulation results indicate that the method improves the accuracy of node localization and lower the delay and energy consumption of networks compared with conventional RSSI-based algorithm.
基于接收信号强度指示器(Received signal strength indicator, RSSI)的定位技术以其相对低的配置、电池电量和易于控制等优点吸引了大量的研究兴趣。然而,基于RSSI的室内定位算法容易受到信道干扰和环境的影响。本文提出了一种基于锚节点反馈校正的室内定位精度提高方法。首先在定位前对整个环境进行划分,确定最小定位区域后,估计区域内路径损失的模型参数,然后精确计算节点间距离,并利用相邻锚节点的反馈进一步提高精度。仿真结果表明,与传统的rssi算法相比,该方法提高了节点定位的精度,降低了网络的时延和能耗。
{"title":"An improved indoor localization based on RSSI and feedback correction of anchor node for WSN","authors":"Xiao-chao Dang, Yili Hei, Zhanjun Hao","doi":"10.1109/CITS.2016.7546393","DOIUrl":"https://doi.org/10.1109/CITS.2016.7546393","url":null,"abstract":"Received signal strength indicator (RSSI)-based localization attracting a great deal of research interest since it requires a relatively low configuration, battery power and easy control. However, the indoor localization algorithm based on RSSI is easy to be influenced by the channel interference and the environment. In this paper, a novel method is presented for improving the accuracy of indoor localization, which is based on anchor node feedback correction. First, the whole environment is divided before positioning, after the minimum location area is determined, the model parameters of the path loss in the region are estimated, then the distance between nodes is calculated accurately, and the feedback of neighbor anchor nodes is used to improve the accuracy further. The simulation results indicate that the method improves the accuracy of node localization and lower the delay and energy consumption of networks compared with conventional RSSI-based algorithm.","PeriodicalId":340958,"journal":{"name":"2016 International Conference on Computer, Information and Telecommunication Systems (CITS)","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134281094","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: 12
Secure message communication among vehicles using elliptic curve cryptography in smart cities 智慧城市中使用椭圆曲线加密的车辆间安全信息通信
Amit Dua, Neeraj Kumar, Mukesh Singh, M. Obaidat, K. Hsiao
Message exchange among vehicles is an integral part of communication in smart cities. Messages are exchanged to inform the other vehicles about emergency situations such as-safety alerts, and location privacy. Due to the usage of an insecure wireless medium, malicious activities in vehicles, i.e., illegal use of the false messages, can astray other vehicles. Security in communication among the vehicles can be provided by encrypting the messages using various security keys. However, it has been found from the literature that existing schemes for secure communication require large key size, and therefore may these schemes may not be applicable to smart cities. To address these issues, a secure message communication scheme among vehicles based on elliptic curve cryptography (ECC) is proposed. The proposed scheme needs smaller key size leading to mathematically simple and cost effective solution. Furthermore, the scheme provides mutual authentication, confidentiality, and forward secrecy. Security analysis prove that the proposed scheme is suitable to be adapted in smart city environment.
车辆之间的信息交换是智慧城市通信的重要组成部分。交换信息,通知其他车辆有关紧急情况,如安全警报和位置隐私。由于使用不安全的无线媒介,车辆中的恶意活动,即非法使用虚假信息,可能会误导其他车辆。车辆之间通信的安全性可以通过使用各种安全密钥对消息进行加密来提供。然而,从文献中发现,现有的安全通信方案需要较大的密钥大小,因此这些方案可能不适用于智慧城市。针对这些问题,提出了一种基于椭圆曲线加密(ECC)的车辆间安全消息通信方案。所提出的方案需要更小的密钥大小,从而导致数学上简单和经济有效的解决方案。此外,该方案还提供了相互认证、保密和前向保密。安全性分析表明,该方案适用于智慧城市环境。
{"title":"Secure message communication among vehicles using elliptic curve cryptography in smart cities","authors":"Amit Dua, Neeraj Kumar, Mukesh Singh, M. Obaidat, K. Hsiao","doi":"10.1109/CITS.2016.7546385","DOIUrl":"https://doi.org/10.1109/CITS.2016.7546385","url":null,"abstract":"Message exchange among vehicles is an integral part of communication in smart cities. Messages are exchanged to inform the other vehicles about emergency situations such as-safety alerts, and location privacy. Due to the usage of an insecure wireless medium, malicious activities in vehicles, i.e., illegal use of the false messages, can astray other vehicles. Security in communication among the vehicles can be provided by encrypting the messages using various security keys. However, it has been found from the literature that existing schemes for secure communication require large key size, and therefore may these schemes may not be applicable to smart cities. To address these issues, a secure message communication scheme among vehicles based on elliptic curve cryptography (ECC) is proposed. The proposed scheme needs smaller key size leading to mathematically simple and cost effective solution. Furthermore, the scheme provides mutual authentication, confidentiality, and forward secrecy. Security analysis prove that the proposed scheme is suitable to be adapted in smart city environment.","PeriodicalId":340958,"journal":{"name":"2016 International Conference on Computer, Information and Telecommunication Systems (CITS)","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133342603","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: 14
Near-threshold SRAM design with dynamic write-assist circuitry 具有动态写辅助电路的近阈值SRAM设计
Chengzhi Jiang, Dayu Zhang, Song Zhang, He Wang
Increasing process variation and reducing supply voltage can significantly degrade the write-ability of near-threshold SRAM cells. Meanwhile, the dynamic write assisting techniques and the high write latency at near-threshold Vdd makes the traditional static performance metrics no longer capable. In this paper, we adopt transient negative bit-line voltage technique (T-NBL) to improve cell write-ability without disturb the read ability and data retention ability. And we propose a new set of performance metrics to fully access the performance of SRAM cells considering the dynamic nature of the write operation. Meanwhile, the efficient robustness consideration has been included. Statistical simulations with a 40nm technology design verify the proposed performance metrics.
增加工艺变化和降低电源电压会显著降低近阈值SRAM单元的可写性。同时,动态写辅助技术和近阈值Vdd下的高写延迟使得传统的静态性能指标不再适用。本文采用暂态负位线电压技术(T-NBL)来提高小区的写入能力,同时又不影响小区的读取能力和数据保留能力。考虑到写入操作的动态性,我们提出了一套新的性能指标来全面访问SRAM单元的性能。同时考虑了有效鲁棒性。采用40nm技术设计的统计模拟验证了所提出的性能指标。
{"title":"Near-threshold SRAM design with dynamic write-assist circuitry","authors":"Chengzhi Jiang, Dayu Zhang, Song Zhang, He Wang","doi":"10.1109/CITS.2016.7546413","DOIUrl":"https://doi.org/10.1109/CITS.2016.7546413","url":null,"abstract":"Increasing process variation and reducing supply voltage can significantly degrade the write-ability of near-threshold SRAM cells. Meanwhile, the dynamic write assisting techniques and the high write latency at near-threshold Vdd makes the traditional static performance metrics no longer capable. In this paper, we adopt transient negative bit-line voltage technique (T-NBL) to improve cell write-ability without disturb the read ability and data retention ability. And we propose a new set of performance metrics to fully access the performance of SRAM cells considering the dynamic nature of the write operation. Meanwhile, the efficient robustness consideration has been included. Statistical simulations with a 40nm technology design verify the proposed performance metrics.","PeriodicalId":340958,"journal":{"name":"2016 International Conference on Computer, Information and Telecommunication Systems (CITS)","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132372290","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: 3
GBAS heavy-tail error overbounding with GARCH model GARCH模型的GBAS重尾误差超界
Kun Fang, R. Xue, Yanbo Zhu
To reduce the inflation for statistical uncertainty and describe the real error distribution objectively, generalized autoregressive conditional heteroskedasticity (GARCH) model is utilized in this paper to model and overbound ground based augmentation system (GBAS) heavy-tail errors. Based on the GARCH model, heavy-tail errors are normalized to the standard Gaussian distribution, and error samples from all elevations are mixed together to calculate overbound without being grouped. By this means, compared with classic error distribution models, the heavy-tail errors are overbounded more tightly, and the calculated inflation factors, error confidence limits in pseudorange domain and protection levels in position domain are reduced correspondingly.
为了减少统计不确定性的膨胀,客观地描述实际误差分布,本文采用广义自回归条件异方差(GARCH)模型对超界地面增强系统(GBAS)重尾误差进行建模。基于GARCH模型,将重尾误差归一化为标准高斯分布,并将各高程的误差样本混合在一起计算过界,不分组。与经典误差分布模型相比,重尾误差的超界性更强,计算出的膨胀因子、伪距域误差置信限和位置域保护等级相应降低。
{"title":"GBAS heavy-tail error overbounding with GARCH model","authors":"Kun Fang, R. Xue, Yanbo Zhu","doi":"10.1109/CITS.2016.7546440","DOIUrl":"https://doi.org/10.1109/CITS.2016.7546440","url":null,"abstract":"To reduce the inflation for statistical uncertainty and describe the real error distribution objectively, generalized autoregressive conditional heteroskedasticity (GARCH) model is utilized in this paper to model and overbound ground based augmentation system (GBAS) heavy-tail errors. Based on the GARCH model, heavy-tail errors are normalized to the standard Gaussian distribution, and error samples from all elevations are mixed together to calculate overbound without being grouped. By this means, compared with classic error distribution models, the heavy-tail errors are overbounded more tightly, and the calculated inflation factors, error confidence limits in pseudorange domain and protection levels in position domain are reduced correspondingly.","PeriodicalId":340958,"journal":{"name":"2016 International Conference on Computer, Information and Telecommunication Systems (CITS)","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114362784","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: 3
Transmission sequence reconstruction and allocation for VANET VANET传输序列重构与分配
Li Cai, Zhexin Xu, Yi Wu, Xiao Lin
In this paper, reconstruction and allocation transmission sequences are investigated for addressing media access control (MAC) without feedback in Vehicular Ad-hoc Network (VANET). Global Navigation Satellite Systems (GNSS) based code allocation is a great solution. It tessellates the geographic region to be covered into regular hexagonal quantization cell. All users access to their location information at marked time instances through GNSS. The transmission sequences are pre-assigned to the location cells and then dynamically assigned to the users. It also proposed a concept of sequence reuse that is akin to frequency reuse. A drawback of GNSS-based code allocation is the average user throughput (AUT) is relatively low. Transmission sequence reconstruction and allocation (TSRA) based on GNSS-based code allocation is proposed. Firstly, in each superframe T, each user acquires user irrepressibility (UI) sequence according to GNSS-based mechanism in the first period to obtain the information of neighbors in the same cell cluster; users in different direction use half of the superframe T respectively. Secondly, users reconstruct a set of UI sequences according to the number of neighbors in the same cell cluster. Then, users acquire a reconstructed sequence according to the order of the users' first successful “1” in the first period. The performance of TSRA is compared with GNSS-based code allocation by ns-2 with the vehicle mobility data from the Simulation of Urban Mobility (SUMO). The simulation results show that the AUT of TSRA is better than GNSS-based code allocation in a relatively sparser distributed network.
本文研究了车载自组网(VANET)中无反馈寻址媒体访问控制(MAC)的重构和分配传输序列。基于全球导航卫星系统(GNSS)的代码分配是一个很好的解决方案。它将要覆盖的地理区域镶嵌成正六边形量化单元。所有用户都可以通过GNSS在标记的时间实例访问他们的位置信息。传输序列预先分配给定位单元,然后动态分配给用户。它还提出了类似于频率重用的序列重用的概念。基于gnss的代码分配的缺点是平均用户吞吐量(AUT)相对较低。提出了基于gnss编码分配的传输序列重构与分配(TSRA)方法。首先,在每个超帧T中,每个用户根据第一周期基于gnss的机制获取用户不可抑制性(UI)序列,以获取同一小区簇中邻居的信息;不同方向的用户分别使用超框架T的一半。其次,用户根据同一单元簇中邻居的数量重构一组UI序列。然后,根据用户在第一个周期内第一次成功“1”的顺序,获得重构序列。将TSRA的性能与ns-2基于gnss的代码分配进行了比较,并利用城市交通仿真(SUMO)的车辆移动数据进行了比较。仿真结果表明,在相对稀疏的分布式网络中,TSRA的自动码分配优于基于gnss的自动码分配。
{"title":"Transmission sequence reconstruction and allocation for VANET","authors":"Li Cai, Zhexin Xu, Yi Wu, Xiao Lin","doi":"10.1109/CITS.2016.7546454","DOIUrl":"https://doi.org/10.1109/CITS.2016.7546454","url":null,"abstract":"In this paper, reconstruction and allocation transmission sequences are investigated for addressing media access control (MAC) without feedback in Vehicular Ad-hoc Network (VANET). Global Navigation Satellite Systems (GNSS) based code allocation is a great solution. It tessellates the geographic region to be covered into regular hexagonal quantization cell. All users access to their location information at marked time instances through GNSS. The transmission sequences are pre-assigned to the location cells and then dynamically assigned to the users. It also proposed a concept of sequence reuse that is akin to frequency reuse. A drawback of GNSS-based code allocation is the average user throughput (AUT) is relatively low. Transmission sequence reconstruction and allocation (TSRA) based on GNSS-based code allocation is proposed. Firstly, in each superframe T, each user acquires user irrepressibility (UI) sequence according to GNSS-based mechanism in the first period to obtain the information of neighbors in the same cell cluster; users in different direction use half of the superframe T respectively. Secondly, users reconstruct a set of UI sequences according to the number of neighbors in the same cell cluster. Then, users acquire a reconstructed sequence according to the order of the users' first successful “1” in the first period. The performance of TSRA is compared with GNSS-based code allocation by ns-2 with the vehicle mobility data from the Simulation of Urban Mobility (SUMO). The simulation results show that the AUT of TSRA is better than GNSS-based code allocation in a relatively sparser distributed network.","PeriodicalId":340958,"journal":{"name":"2016 International Conference on Computer, Information and Telecommunication Systems (CITS)","volume":"180 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116324632","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
Research on the methods of multipath separation for shallow water wideband signal based on warping transformation 基于翘曲变换的浅水宽带信号多径分离方法研究
Chuanxi Xing, Guofang Dong, Lingling Kong, T. Gao
For the research on the multipath characteristics of shallow water wideband signal, the methods of multi-path separation were explored. After the summary of all kinds of normal mode decomposition method and the combination with a new kind of non-linear signal processing transformation method Warping transformation, a new method of multi-path separation for shallow water wideband acoustic signal based on Warping transformation was proposed. With the transmitted signals limited on a time window and the received signal of the processing of pulse compression, the processed received signal had a processing of warping transform and time-frequency analysis, in this way, a method which has wide applicability and high precision on decomposition and information ex-traction of the normal mode was achieved. Finally, a conclusion was verified through a simulation, the new method can be used in the normal mode separation of the chirp transmitted signal with a certain length of time, and has a greater advantage compared with conventional Warping transform processing results. Meanwhile, the separation signals extracted were substantially identical with the original signal after inverse operation restore, which proved the accuracy of this method.
针对浅水宽带信号的多径特性,探索了多径分离方法。在总结各种正态模态分解方法的基础上,结合一种新的非线性信号处理变换方法翘曲变换,提出了一种基于翘曲变换的浅水宽带声信号多径分离新方法。将发射信号限制在一个时间窗口内,接收信号进行脉冲压缩处理,对处理后的接收信号进行翘曲变换和时频分析处理,从而实现了一种适用范围广、精度高的法向模分解和信息提取方法。最后,通过仿真验证了一个结论,该方法可用于一定时间长度的啁啾传输信号的正模分离,并且与传统的翘曲变换处理结果相比具有更大的优势。同时,提取的分离信号经过逆运算还原后与原始信号基本一致,证明了该方法的准确性。
{"title":"Research on the methods of multipath separation for shallow water wideband signal based on warping transformation","authors":"Chuanxi Xing, Guofang Dong, Lingling Kong, T. Gao","doi":"10.1109/CITS.2016.7546400","DOIUrl":"https://doi.org/10.1109/CITS.2016.7546400","url":null,"abstract":"For the research on the multipath characteristics of shallow water wideband signal, the methods of multi-path separation were explored. After the summary of all kinds of normal mode decomposition method and the combination with a new kind of non-linear signal processing transformation method Warping transformation, a new method of multi-path separation for shallow water wideband acoustic signal based on Warping transformation was proposed. With the transmitted signals limited on a time window and the received signal of the processing of pulse compression, the processed received signal had a processing of warping transform and time-frequency analysis, in this way, a method which has wide applicability and high precision on decomposition and information ex-traction of the normal mode was achieved. Finally, a conclusion was verified through a simulation, the new method can be used in the normal mode separation of the chirp transmitted signal with a certain length of time, and has a greater advantage compared with conventional Warping transform processing results. Meanwhile, the separation signals extracted were substantially identical with the original signal after inverse operation restore, which proved the accuracy of this method.","PeriodicalId":340958,"journal":{"name":"2016 International Conference on Computer, Information and Telecommunication Systems (CITS)","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128704850","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
Economy-efficient resource allocation in cloud radio access networks with fronthaul capacity constraints 具有前传容量约束的云无线接入网络中经济高效的资源分配
Yayun Wang, M. Peng, Kecheng Zhang
As an advanced paradigm, the cloud radio access network (C-RAN) promises high spectral efficiency (SE) and energy efficiency (EE). However, the capacity-constrained fronthaul has become a key performance bottleneck for C-RANs. Generally, the traditional SE and EE are utilized to evaluate radio transmit performances without considering fronthaul cost, which is always the major concern for operators. In this paper, an economical spectral efficiency (ESE) is proposed to jointly take traditional SE/EE and the impact of wired/wireless fronthaul into account. Aiming at maximizing ESE, a non-convex beamformer design problem with fronthaul capacity and transmit power constraints is formulated. To deal with this non-convexity, the primal problem is transformed to an equivalent problem, which is solved by the weighted minimum mean square error approach. Simulation results demonstrate that the proposed algorithm can significantly improve ESE, in which the impact of fronthaul on ESE is evaluated and analyzed as well.
作为一种先进的范例,云无线接入网(C-RAN)承诺高频谱效率(SE)和能源效率(EE)。然而,容量受限的前传已经成为c - ran的主要性能瓶颈。通常使用传统的SE和EE来评估无线电发射性能,而不考虑前传成本,这一直是运营商关注的主要问题。本文提出了一种综合考虑传统频谱效率和有线/无线前传影响的经济频谱效率(ESE)。以最大等效空间为目标,提出了具有前传容量和发射功率约束的非凸波束形成器设计问题。为了处理这种非凸性,将原问题转化为等效问题,采用加权最小均方误差法求解。仿真结果表明,本文提出的算法能够显著提高自动识别能力,并对前传对自动识别能力的影响进行了评估和分析。
{"title":"Economy-efficient resource allocation in cloud radio access networks with fronthaul capacity constraints","authors":"Yayun Wang, M. Peng, Kecheng Zhang","doi":"10.1109/CITS.2016.7546414","DOIUrl":"https://doi.org/10.1109/CITS.2016.7546414","url":null,"abstract":"As an advanced paradigm, the cloud radio access network (C-RAN) promises high spectral efficiency (SE) and energy efficiency (EE). However, the capacity-constrained fronthaul has become a key performance bottleneck for C-RANs. Generally, the traditional SE and EE are utilized to evaluate radio transmit performances without considering fronthaul cost, which is always the major concern for operators. In this paper, an economical spectral efficiency (ESE) is proposed to jointly take traditional SE/EE and the impact of wired/wireless fronthaul into account. Aiming at maximizing ESE, a non-convex beamformer design problem with fronthaul capacity and transmit power constraints is formulated. To deal with this non-convexity, the primal problem is transformed to an equivalent problem, which is solved by the weighted minimum mean square error approach. Simulation results demonstrate that the proposed algorithm can significantly improve ESE, in which the impact of fronthaul on ESE is evaluated and analyzed as well.","PeriodicalId":340958,"journal":{"name":"2016 International Conference on Computer, Information and Telecommunication Systems (CITS)","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126951160","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: 3
Computational efficient Variational Bayesian Gaussian Mixture Models via Coreset 基于Coreset的高效变分贝叶斯-高斯混合模型
Min Zhang, Yinlin Fu, K. Bennett, Teresa Wu
Variational Bayesian Gaussian Mixture Model is a popular clustering algorithm with a reliable performance. However, it is noted that the model fitting process takes long time, especially when dealing with large scale data, since it utilizes the whole dataset. To address this issue, in paper we propose a new algorithm termed a weighted VBGMM via Coreset. Specifically, a new coreset construction method is first proposed to sample the data which is used to fit the model. To evaluate the algorithm, two datasets are used: 1) six rat kidney images datasets 2) three human kidney images datasets. The results show that our proposed algorithm is much faster (~ 20 times) comparing to classic VBGMM while maintaining the similar performance on whole dataset.
变分贝叶斯-高斯混合模型是目前流行的一种性能可靠的聚类算法。然而,需要注意的是,模型拟合过程需要很长时间,特别是在处理大规模数据时,因为它使用了整个数据集。为了解决这一问题,本文提出了一种基于Coreset的加权VBGMM算法。具体而言,首先提出了一种新的核心集构建方法来对用于拟合模型的数据进行采样。为了评估该算法,使用了两个数据集:1)六个大鼠肾脏图像数据集;2)三个人肾脏图像数据集。结果表明,本文提出的算法比经典的VBGMM要快得多(约20倍),同时在整个数据集上保持相似的性能。
{"title":"Computational efficient Variational Bayesian Gaussian Mixture Models via Coreset","authors":"Min Zhang, Yinlin Fu, K. Bennett, Teresa Wu","doi":"10.1109/CITS.2016.7546405","DOIUrl":"https://doi.org/10.1109/CITS.2016.7546405","url":null,"abstract":"Variational Bayesian Gaussian Mixture Model is a popular clustering algorithm with a reliable performance. However, it is noted that the model fitting process takes long time, especially when dealing with large scale data, since it utilizes the whole dataset. To address this issue, in paper we propose a new algorithm termed a weighted VBGMM via Coreset. Specifically, a new coreset construction method is first proposed to sample the data which is used to fit the model. To evaluate the algorithm, two datasets are used: 1) six rat kidney images datasets 2) three human kidney images datasets. The results show that our proposed algorithm is much faster (~ 20 times) comparing to classic VBGMM while maintaining the similar performance on whole dataset.","PeriodicalId":340958,"journal":{"name":"2016 International Conference on Computer, Information and Telecommunication Systems (CITS)","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130006497","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: 3
Improving the ScSPM model with Log-Euclidean Covariance matrix for scene classification 基于对数-欧几里德协方差矩阵的ScSPM模型场景分类改进
Jiangfeng Yang, Chuanxi Xing, Yuebin Chen
The framework of the ScSPM (Spatial Pyramid matching method using Sparse Coding) model is concise, but a good performance in scene classification is achieved. However, its performance can not be significantly improved duo to the limited discriminative power of the SIFT descriptors. To address the problem, covariance matrices as region descriptors are introduced to incorporate with the SIFTs. For computing the distance between them, covariances are transformed to LECM features by matrix logarithm operation. Moreover, exponential weights are imposed on the pooled features to enhance the performance of linear kernel SVM. Experiments on the public datasets demonstrate that the performance of the ScSPM can be improved dramatically by combining the LECM features, and our model achieves the performance competitive with previous methods.
ScSPM (Spatial Pyramid matching method using Sparse Coding)模型框架简洁,但在场景分类方面取得了较好的效果。然而,由于SIFT描述子的判别能力有限,其性能并不能得到显著提高。为了解决这个问题,引入了协方差矩阵作为区域描述符来与sift结合。为了计算它们之间的距离,通过矩阵对数运算将协方差转换为LECM特征。此外,为了提高线性核支持向量机的性能,对池化特征施加指数权重。在公共数据集上的实验表明,结合LECM特征可以显著提高ScSPM的性能,并且我们的模型达到了与以前的方法相媲美的性能。
{"title":"Improving the ScSPM model with Log-Euclidean Covariance matrix for scene classification","authors":"Jiangfeng Yang, Chuanxi Xing, Yuebin Chen","doi":"10.1109/CITS.2016.7546458","DOIUrl":"https://doi.org/10.1109/CITS.2016.7546458","url":null,"abstract":"The framework of the ScSPM (Spatial Pyramid matching method using Sparse Coding) model is concise, but a good performance in scene classification is achieved. However, its performance can not be significantly improved duo to the limited discriminative power of the SIFT descriptors. To address the problem, covariance matrices as region descriptors are introduced to incorporate with the SIFTs. For computing the distance between them, covariances are transformed to LECM features by matrix logarithm operation. Moreover, exponential weights are imposed on the pooled features to enhance the performance of linear kernel SVM. Experiments on the public datasets demonstrate that the performance of the ScSPM can be improved dramatically by combining the LECM features, and our model achieves the performance competitive with previous methods.","PeriodicalId":340958,"journal":{"name":"2016 International Conference on Computer, Information and Telecommunication Systems (CITS)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128922675","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
Wide area and wide band spectrum monitoring system based on sensor networks 基于传感器网络的广域宽带频谱监测系统
Weilong Hu, Zan Li, Linlin Liang
With the increasing importance of radio spectrum in the national economy and safety, this paper develops a wide area and wide band radio spectrum monitoring system which uses sensor networks. The significant contribution of the paper is introducing wireless sensor networks into the design of the spectrum monitoring system. A spectrum monitoring oriented private network architecture is designed to realize the networked spectrum monitoring, and make the multi-node cooperation possible. So far, our system has covered the old and new campus of Xidian University, the forth telecom science institute, and other test regions, and continuously operated for two years. Under the monitoring band with 20MHz-8GHz, the system can achieve integrated comprehensive signal processing and intelligent analysis including signal detection, modulation recognition and location-tracking. The system solves the problems of spectrum monitoring and signal processing, which can be applied to spectrum monitoring in the complex electromagnetic environment.
随着无线电频谱在国民经济和安全中的重要性日益提高,本文开发了一种基于传感器网络的广域宽带无线电频谱监测系统。本文的重要贡献在于将无线传感器网络引入到频谱监测系统的设计中。设计了面向频谱监控的专网架构,实现了网络化频谱监控,使多节点协作成为可能。目前,系统已覆盖西安电子科技大学新老校区、电信四院等测试区域,并已连续运行两年。在20MHz-8GHz监控频段下,系统可实现包括信号检测、调制识别、位置跟踪在内的综合信号处理和智能分析。该系统解决了频谱监测和信号处理问题,可应用于复杂电磁环境下的频谱监测。
{"title":"Wide area and wide band spectrum monitoring system based on sensor networks","authors":"Weilong Hu, Zan Li, Linlin Liang","doi":"10.1109/CITS.2016.7546438","DOIUrl":"https://doi.org/10.1109/CITS.2016.7546438","url":null,"abstract":"With the increasing importance of radio spectrum in the national economy and safety, this paper develops a wide area and wide band radio spectrum monitoring system which uses sensor networks. The significant contribution of the paper is introducing wireless sensor networks into the design of the spectrum monitoring system. A spectrum monitoring oriented private network architecture is designed to realize the networked spectrum monitoring, and make the multi-node cooperation possible. So far, our system has covered the old and new campus of Xidian University, the forth telecom science institute, and other test regions, and continuously operated for two years. Under the monitoring band with 20MHz-8GHz, the system can achieve integrated comprehensive signal processing and intelligent analysis including signal detection, modulation recognition and location-tracking. The system solves the problems of spectrum monitoring and signal processing, which can be applied to spectrum monitoring in the complex electromagnetic environment.","PeriodicalId":340958,"journal":{"name":"2016 International Conference on Computer, Information and Telecommunication Systems (CITS)","volume":"117 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129232545","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: 2
期刊
2016 International Conference on Computer, Information and Telecommunication Systems (CITS)
全部 Acc. Chem. Res. ACS Applied Bio Materials ACS Appl. Electron. Mater. ACS Appl. Energy Mater. ACS Appl. Mater. Interfaces ACS Appl. Nano Mater. ACS Appl. Polym. Mater. ACS BIOMATER-SCI ENG ACS Catal. ACS Cent. Sci. ACS Chem. Biol. ACS Chemical Health & Safety ACS Chem. Neurosci. ACS Comb. Sci. ACS Earth Space Chem. ACS Energy Lett. ACS Infect. Dis. ACS Macro Lett. ACS Mater. Lett. ACS Med. Chem. Lett. ACS Nano ACS Omega ACS Photonics ACS Sens. ACS Sustainable Chem. Eng. ACS Synth. Biol. Anal. Chem. BIOCHEMISTRY-US Bioconjugate Chem. BIOMACROMOLECULES Chem. Res. Toxicol. Chem. Rev. Chem. Mater. CRYST GROWTH DES ENERG FUEL Environ. Sci. Technol. Environ. Sci. Technol. Lett. Eur. J. Inorg. Chem. IND ENG CHEM RES Inorg. Chem. J. Agric. Food. Chem. J. Chem. Eng. Data J. Chem. Educ. J. Chem. Inf. Model. J. Chem. Theory Comput. J. Med. Chem. J. Nat. Prod. J PROTEOME RES J. Am. Chem. Soc. LANGMUIR MACROMOLECULES Mol. Pharmaceutics Nano Lett. Org. Lett. ORG PROCESS RES DEV ORGANOMETALLICS J. Org. Chem. J. Phys. Chem. J. Phys. Chem. A J. Phys. Chem. B J. Phys. Chem. C J. Phys. Chem. Lett. Analyst Anal. Methods Biomater. Sci. Catal. Sci. Technol. Chem. Commun. Chem. Soc. Rev. CHEM EDUC RES PRACT CRYSTENGCOMM Dalton Trans. Energy Environ. Sci. ENVIRON SCI-NANO ENVIRON SCI-PROC IMP ENVIRON SCI-WAT RES Faraday Discuss. Food Funct. Green Chem. Inorg. Chem. Front. Integr. Biol. J. Anal. At. Spectrom. J. Mater. Chem. A J. Mater. Chem. B J. Mater. Chem. C Lab Chip Mater. Chem. Front. Mater. Horiz. MEDCHEMCOMM Metallomics Mol. Biosyst. Mol. Syst. Des. Eng. Nanoscale Nanoscale Horiz. Nat. Prod. Rep. New J. Chem. Org. Biomol. Chem. Org. Chem. Front. PHOTOCH PHOTOBIO SCI PCCP Polym. Chem.
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
0
微信
客服QQ
Book学术公众号 扫码关注我们
反馈
×
意见反馈
请填写您的意见或建议
请填写您的手机或邮箱
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
Book学术官方微信
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术
文献互助 智能选刊 最新文献 互助须知 联系我们:info@booksci.cn
Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。
Copyright © 2023 Book学术 All rights reserved.
ghs 京公网安备 11010802042870号 京ICP备2023020795号-1