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2016 IEEE International Conference on Network Infrastructure and Digital Content (IC-NIDC)最新文献

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Review aspect extraction based on character-enhanced embedding models 基于字符增强嵌入模型的评论方面提取
Jingxuan Yang, Qinjie Lyu, Sheng Gao, Lin Qiu, Jun Guo
User reviews, in the form of short unstructured natural texts, often provide rich information to benefit product adoption or service improvement. Aspect can be extracted as the abstract meaning from the reviews. Traditional methods have employed either rule-based templates or bag-of-words features for aspect extraction from text. However, these models cannot effectively handle short texts, especially in Chinese reviews. In this paper, we address the issue by learning the character embeddings as the basic semantic unit and incorporating the compositional sentence-level representation into a neural network approach for review aspect classification. For that, the character embeddings from the reviews are learned in position-based and clustered-based fashions, and then combined into sentence vectors to yield better text representations. Extensive experiments on real world data set suggest that our proposed model highly outperforms the state-of-the-art methods for review aspect extraction task.
用户评论,以简短的非结构化自然文本的形式,通常提供丰富的信息,有利于产品采用或服务改进。Aspect可以从评论中提取出抽象的含义。传统方法采用基于规则的模板或词袋特征从文本中提取方面。然而,这些模型不能有效地处理短文本,尤其是中文评论。在本文中,我们通过学习字符嵌入作为基本语义单元,并将合成句子级表示纳入神经网络方法来解决这个问题。为此,以基于位置和基于聚类的方式学习评论中的字符嵌入,然后将其组合成句子向量以产生更好的文本表示。在真实世界数据集上的大量实验表明,我们提出的模型在评论方面提取任务上的表现优于最先进的方法。
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引用次数: 1
Secure transmission based on cooperative jamming relay in heterogeneous massive MIMO system 异构海量MIMO系统中基于协同干扰中继的安全传输
Chang Li, Xinran Zhang, Wei Lin, Songlin Sun
Security is an important concern in wireless networks. In this paper, we study secure transmission in heterogeneous massive MIMO systems. Base station (BS) with large-scale antenna transmits signal to mobile terminals through low power nodes (LPNs) in the presence of passive multi-antenna eavesdroppers. We consider the secure downlink transmission based on cooperative jamming relay. Meanwhile we employ artificial noise to enhance the security. Our simulation results reveal in heterogeneous massive MIMO systems with Jammer and AN, the SNR of MT is higher than Eve, the obtained positive secrecy capacity prove this scheme can guarantee the secure transmission.
安全是无线网络的一个重要问题。本文研究了异构海量MIMO系统中的安全传输问题。具有大规模天线的基站在无源多天线窃听器存在的情况下,通过低功率节点(lpn)向移动终端传输信号。研究了基于协同干扰中继的安全下行传输。同时我们采用了人工噪声来提高安全性。仿真结果表明,在具有干扰器和AN的异构大规模MIMO系统中,MT的信噪比高于Eve,所获得的正保密容量证明该方案可以保证传输的安全性。
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引用次数: 1
Performance analysis of cooperative quickest interference detection for GNSS GNSS协同最快干扰检测性能分析
Jaehoon Lee, Junhyuk Kim, Hyowon Kim, Chansik Park, M. Lee, Sunwoo Kim
In this paper, we present a performance of cooperative quickest interference detection for GNSS. Various schemes for interference detection have already been studied in GNSS literature, the purpose is to focus on a reliable and fast detection. We consider cooperative detection using the CUSUM test in multi-GNSS receiver scenario. The proposed approach results of simulation show the fundamental framework to apply GNSS of cooperative quickest detection.
本文提出了一种基于GNSS的协同快速干扰检测方法。GNSS文献中已经研究了各种干扰检测方案,其目的都是为了实现可靠、快速的检测。我们考虑在多gnss接收机场景下使用CUSUM测试进行协同检测。仿真结果表明,该方法是实现GNSS协同快速检测的基本框架。
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引用次数: 0
Unequal block for low bandwidth adaption in wireless video broadcast 无线视频广播中低带宽适应的不等块
Zhexin Li, Yu Liu, Yumei Wang
With the development of information technology, people's demand for wireless video is improved. Recently, an uncoded video transmission scheme called SoftCast was proposed for wireless video communication which provided graceful transition quality. However, when channel bandwidth is low, we need to discard some packets before transmitting to meet the requirement of bandwidth. This will cause a sharp decline on receiver video quality. This paper proposed an unequal block method (UBCAST) based on the frequency of image. UBCAST divides the lowest frequency into the biggest block to protect low frequency information, and divides the highest frequency into the smallest block which can protect low frequency packets from being discarded. What's more we can increase high frequency block proportion to improve transmission quality. And we can also increase low frequency block proportion to increase discarding packets proportion to meet the bandwidth requirement of channel. The experimental results show that when transmitting video information completely, we can improve the performance of the original SoftCast using 8∗8 block up to 2dB. When the SNR of channel is 20dB, discarding packets, we can even get a 10dB gain.
随着信息技术的发展,人们对无线视频的需求不断提高。近年来,人们提出了一种用于无线视频通信的无编码视频传输方案SoftCast,该方案提供了优美的转换质量。但是,在信道带宽较低的情况下,为了满足带宽的要求,在发送之前需要丢弃一些数据包。这将导致接收机视频质量急剧下降。提出了一种基于图像频率的不等块算法(UBCAST)。UBCAST将最低频率划分为最大块以保护低频信息,将最高频率划分为最小块以保护低频数据包不被丢弃。此外,还可以通过增加高频块比例来提高传输质量。还可以通过提高低频分组比例来提高丢包比例,以满足信道的带宽要求。实验结果表明,在完全传输视频信息的情况下,使用最大2dB的8 * 8块可以提高原软播的性能。当信道信噪比为20dB时,丢弃数据包,我们甚至可以获得10dB增益。
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引用次数: 2
Compressed sensing for frequency hopping communication signals via analog to information converter 基于模拟信息转换器的跳频通信信号压缩感知
Lei Chen, Hui Peng, Mengyue Liu, Yu Liu
Frequency Hopping Communication Signal (FHCS) is widely used in military filed especially in military communication for its good anti-jamming performance and multiple access capability. Due to the rapid development of communication technology, the band width of FHCS become wider and wider, frequency become larger and larger. There will be a huge pressure on Analog to Digital Converter (ADC) as well as DSP device. Theory of compressed sensing (CS) enables a successful reconstruction of sparse signal by sampling at a sub-Nyquist sample rate. Analog to Information Converter is a better implementation of CS, which includes Random Demodulator scheme (RD) and Modulated Wideband Converter (MWC). In this paper, we apply these two schemes into FHCS's compressed sampling and reconstruction. Simulations are performed to verify that RD scheme can reconstruct signal successfully with high possibility with relatively low time complexity at low sample rate. Besides, MWC guarantees the accuracy and efficiency of signal collection.
跳频通信信号以其良好的抗干扰性能和多址能力在军事通信领域得到了广泛的应用。由于通信技术的飞速发展,光纤通信系统的带宽越来越宽,频率越来越大。这将给模数转换器(ADC)和DSP器件带来巨大的压力。压缩感知理论(CS)能够通过以亚奈奎斯特采样率采样来成功地重建稀疏信号。模拟信息转换器是一种较好的CS实现方案,它包括随机解调器(RD)和调制宽带转换器(MWC)。本文将这两种方案应用到FHCS的压缩采样和重构中。仿真结果表明,该方法能够在低采样率下以较低的时间复杂度,以较高的概率成功重构信号。此外,MWC保证了信号采集的准确性和效率。
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引用次数: 2
Research of public opinion hotspot detection model based on Web big data 基于Web大数据的舆情热点检测模型研究
C. Fan, Yuexin Wu, Jun Zhang, Tianlin Zhao
In the Web public opinion hotspot analysis, the opinion and emotion in the Web comment play an important role in identifying news topic and emphasis, where few research are carried out. In addition, reports from different data source are processed with the same weight, which may not actually describe the public opinion. This paper propose a hot public opinion discovery model based on quantitative comment and emotion. In this model, Web opinion mining is applied in presence of report vector. By constructing the Web opinion dictionary, the inclination and intensity of Web comment are quantitated by the form of vector. A modified Page-Rank algorism is also proposed to evaluate the source of the Web opinion. Experiment shows that this model can reduce the false detection rate and missing rate of opinion discovery.
在网络舆情热点分析中,网络评论中的观点和情感对新闻话题和重点的识别起着重要的作用,但这方面的研究却很少。此外,来自不同数据源的报告被以相同的权重处理,这可能无法真正描述民意。本文提出了一种基于定量评论和情感的热点舆情发现模型。在该模型中,在报告向量存在的情况下,应用Web意见挖掘。通过构建网络评论词典,以向量的形式量化网络评论的倾向性和强度。本文还提出了一种改进的Page-Rank算法来评估Web意见的来源。实验表明,该模型可以降低意见发现的误检率和缺失率。
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引用次数: 7
Understanding online shopping and offline mobility behavior in urban area from the view of multilayer networks 从多层网络的角度理解城市线上购物和线下移动行为
Yuanyuan Qiao, Yanting Zhang, Anders Lindgren, Jie Yang
The interactive nature of the Internet offers many opportunities to increase the efficiency of online shopping by improving availability of product information, enabling direct multi-attribute comparisons, and reducing buyer search costs. A great body of research focuses on how consumers shop online or why and how online shopping impacts urban development, but the understanding of mutual influence between online and offline behavior of consumers remains somewhat underserved. This paper bridges that gap by quantifying the relationship between consumers' online shopping and offline mobility behavior. The results of the study give insights to further understand human behavior from both a cyber and real world point of view, which may help to place location based targeted advertisements, and plan commercial & retail centers in urban areas.
Internet的交互性提供了许多机会,通过提高产品信息的可用性、支持直接的多属性比较和降低买家搜索成本来提高在线购物的效率。大量的研究集中在消费者如何在网上购物或网上购物为什么以及如何影响城市发展,但对消费者线上和线下行为之间相互影响的理解仍然有些不足。本文通过量化消费者在线购物和线下移动行为之间的关系,弥合了这一差距。该研究的结果为进一步从网络和现实世界的角度理解人类行为提供了见解,这可能有助于放置基于位置的定向广告,并规划城市地区的商业和零售中心。
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引用次数: 1
A fast and scalable supervised topic model using stochastic variational inference and MapReduce 基于随机变分推理和MapReduce的快速可扩展监督主题模型
Wenzhuo Song, Bo Yang, Xuehua Zhao, Fei Li
An important and widespread topic in cloud computing is text analyzing. People often use topic model which is a popular and effective technology to deal with related tasks. Among all the topic models, sLDA is acknowledged as a popular supervised topic model, which adds a response variable or category label with each document, so that the model can uncover the latent structure of a text dataset as well as retains the predictive power for supervised tasks. However, sLDA needs to process all the documents at each iteration in the training period. When the size of dataset increases to the volume that one node cannot deal with, sLDA will no longer be competitive. In this paper we propose a novel model named Mr.sLDA which extends sLDA with stochastic variational inference (SVI) and MapReduce. SVI can reduce the computational burden of sLDA and MapReduce extends the algorithm with parallelization. Mr.sLDA makes the training become more efficient and the training method can be easily implemented in a large computer cluster or cloud computing. Empirical results show that our approach has an efficient training process, and similar accuracy with sLDA.
云计算中一个重要而广泛的话题是文本分析。人们经常使用主题模型来处理相关任务,这是一种流行且有效的技术。在所有主题模型中,sLDA是公认的流行的监督主题模型,它在每个文档中添加响应变量或类别标签,使模型能够揭示文本数据集的潜在结构,并保留对监督任务的预测能力。但是,sLDA需要在训练周期的每次迭代中处理所有的文档。当数据集的大小增加到一个节点无法处理的体积时,sLDA将不再具有竞争力。在本文中,我们提出了一个新的模型Mr.sLDA,它将sLDA扩展为随机变分推理(SVI)和MapReduce。SVI可以减少sLDA的计算负担,MapReduce通过并行化扩展了该算法。Mr.sLDA使训练变得更加高效,训练方法可以很容易地在大型计算机集群或云计算中实现。实验结果表明,该方法具有高效的训练过程,且准确率与sLDA相近。
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引用次数: 2
Detection-assisted interference parameter estimation and interference cancellation for LTE-Advanced system LTE-Advanced系统的检测辅助干扰参数估计与干扰消除
Qiangze Chi, Xin Zhang, Dacheng Yang
Inter-cell interference is the main obstacle for increasing the network capacity of Long-Term Evolution Advanced (LTE-A) system. Interference Cancellation (IC) is a promising way to improve spectral efficiency. 3rd Generation Partnership Project (3GPP) raises a new research project — Network-Assisted Interference Cancellation and Suppression (NAICS) in LTE Rel-12. Advanced receivers used in NAICS include maximum likelihood (ML) receiver and symbol-level IC (SLIC) receiver. Those receivers need some interference parameters, such as rank indicator (RI), precoding matrix indicator (PMI) and modulation level (MOD). This paper presents a new IC receiver based on detection. We get the clean interfering signal assisted by detection and use it in SLIC. The clean interfering signal makes the estimation of interfering transmitted signal more accurate. So interference cancellation would be more significant. We also improve the method of interference parameter estimation that avoids estimating power boosting and precoding matrix simultaneously. The simulation results show that the performance of proposed SLIC is better than traditional SLIC and close to ML.
小区间干扰是长期演进高级(LTE-A)系统网络容量提升的主要障碍。干扰抵消(IC)是一种很有前途的提高频谱效率的方法。第三代合作伙伴计划(3GPP)在LTE Rel-12中提出了一个新的研究项目——网络辅助干扰抵消和抑制(NAICS)。NAICS中使用的高级接收器包括最大似然(ML)接收器和符号级集成电路(SLIC)接收器。这些接收机需要一些干扰参数,如秩指示器(RI)、预编码矩阵指示器(PMI)和调制电平(MOD)。本文提出了一种基于检测的新型集成电路接收机。在检测辅助下得到干净的干扰信号,并将其应用于SLIC中。干净的干扰信号使干扰发射信号的估计更加准确。所以干扰消除会更重要。改进了干扰参数估计方法,避免了同时估计功率提升和预编码矩阵。仿真结果表明,所提出的SLIC的性能优于传统的SLIC,接近ML。
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引用次数: 2
An experimental study: The sufficient respiration rate detection technique via continuous wave Doppler radar 实验研究:连续波多普勒雷达充分呼吸频率检测技术
Ku-young Chung, Bong-Ki Lee, Kwangsub Song, Kangsoo Shin, Seok-Hyun Cho, Joon‐Hyuk Chang
In this paper, we present the experimental study based on filtering techniques to extract essential vital signals such respiration rate (RR) using continuous wave (CW) Doppler radar sensor. Due to the fact that the CW Doppler radar offers very high sensitivity towards minor movements, based on this technology, various filtering techniques were introduced and the detection rate was compared to the reference devices to conclude the leading method for the respiration rate detection.
本文提出了基于滤波技术的连续波多普勒雷达传感器呼吸速率(RR)等重要生命信号提取实验研究。由于连续波多普勒雷达对微小运动具有很高的灵敏度,在此基础上,引入了各种滤波技术,并将检测率与参考设备进行了比较,得出了呼吸速率检测的领先方法。
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引用次数: 1
期刊
2016 IEEE International Conference on Network Infrastructure and Digital Content (IC-NIDC)
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