2014 IEEE Computers, Communications and IT Applications Conference最新文献_第3页

Bayes topic prediction model for focused crawling of vertical search engine 垂直搜索引擎聚焦爬行的Bayes主题预测模型

2014 IEEE Computers, Communications and IT Applications Conference Pub Date : 2014-10-01 DOI: 10.1109/ComComAp.2014.7017213

Weihong Zhang, Yong Chen

{"title":"Bayes topic prediction model for focused crawling of vertical search engine","authors":"Weihong Zhang, Yong Chen","doi":"10.1109/ComComAp.2014.7017213","DOIUrl":"https://doi.org/10.1109/ComComAp.2014.7017213","url":null,"abstract":"Vertical search is an important topic in the design of search engines as it offers more abundant and more precise results on specific domain compared with large-scale search engines, like Google and Baidu. Prior to this paper, most vertical search engines were built using manually selected and edited materials, which was time and money consuming. In this paper, we propose a new information resource discovery model and build a crawler in the vertical search engine, which can selectively fetch webpages relevant to a pre-defined topic. The model includes three aspects. First, webpages are transformed into term vectors. TF-TUF , short for Term Frequency-Topic Unbalanced Factor , is proposed as the weighting schema in vector space model. In the schema,we put more weight on terms whose frequencies differ a lot among topics, which will contribute more in the topic prediction we believe. Second, we use Bayes method to predict the topics of the webpages, where topic labeled text is used for training in advance. The specific method about using Bayes to predict the topic is illustrated in the algorithm section. Third, we create a focused crawler using the topic prediction result. The prediction result is used not only to filter the irrelevant webpages but also to direct the crawler to the areas, which are most possible to be topic relevant. The whole three aspects work together to reach the goal of discovering the topic relevant materials on the web efficiently, in building a vertical search engine. Our experiment shows that the average prediction accuracy of our proposed model can reach more than 85%. For application, we also used the proposed model to build \"Search Engine for S&T\" (http://nstr.com.cn/search), a vertical search engine in science field.","PeriodicalId":422906,"journal":{"name":"2014 IEEE Computers, Communications and IT Applications Conference","volume":"50 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124610747","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

An efficient and accurate optimization method of sliding window size for PAA 一种高效、准确的PAA滑动窗尺寸优化方法

2014 IEEE Computers, Communications and IT Applications Conference Pub Date : 2014-10-01 DOI: 10.1109/ComComAp.2014.7017211

Jinyang Liu, Chuanlei Zhang, Shanwen Zhang, Weidong Fang

引用次数: 3

Fast acquisition method of navigation receiver based on folded PMF-FFT 基于折叠PMF-FFT的导航接收机快速捕获方法

2014 IEEE Computers, Communications and IT Applications Conference Pub Date : 2014-10-01 DOI: 10.1109/ComComAp.2014.7017171

Jianzhong Qi, Feixiang Luo, Qingping Song

引用次数: 10

Energy efficient scheduling with probability and task migration considerations for soft real-time systems 考虑概率和任务迁移的软实时系统节能调度

2014 IEEE Computers, Communications and IT Applications Conference Pub Date : 2014-10-01 DOI: 10.1109/ComComAp.2014.7017212

Ying Li, J. Niu, Xiang Long, Meikang Qiu

{"title":"Energy efficient scheduling with probability and task migration considerations for soft real-time systems","authors":"Ying Li, J. Niu, Xiang Long, Meikang Qiu","doi":"10.1109/ComComAp.2014.7017212","DOIUrl":"https://doi.org/10.1109/ComComAp.2014.7017212","url":null,"abstract":"The main challenges for embedded real-time systems which use battery as their power supply are both to satisfy the requirements of real-time systems and minimize the energy consumption. This paper studies the energy saving problem for DAG (Directed Acyclic Graph) tasks in soft real-time systems with heterogeneous multicore processors. Since soft real-time systems can tolerate occasional time violations and tasks are completed before deadlines with a given probability, this paper proposes a novel processor and voltage assignment scheme - Adaptive Processor and Voltage Assignment with Probability (APVAP) to realize the minimum energy consumption which can satisfy the requirements of time constraints under the given probability. Most of previous work focuses on multicore processor task assignment for predecessor and successor (P-S) tasks. However, this paper introduced affinity to indicate successor tasks can be re-allocated to more appropriate cores according to task features and workload. Besides, this paper introduces the concept of data migration energy (DME) to compute the transmission energy when a task is migrated to a different core and adopts Ratio between Time and Energy (RTE) to determine the most suitable tasks for migration to reduce energy consumption at the cost of execution time. The experimental results demonstrate that our approach outperforms state-of-the-art algorithms in this field (maximum improvement of 30.7%).","PeriodicalId":422906,"journal":{"name":"2014 IEEE Computers, Communications and IT Applications Conference","volume":"83 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114856781","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: 6

Detecting overlapping communities of weighted networks by central figure algorithm 基于中心图算法的加权网络重叠社区检测

2014 IEEE Computers, Communications and IT Applications Conference Pub Date : 2014-10-01 DOI: 10.1109/ComComAp.2014.7017161

Chao Tong, Zhongyu Xie, Xiaoyun Mo, J. Niu, Yan Zhang

引用次数: 3

Horizontal hierarchy slicing based data compression for WSN 基于水平层次切片的WSN数据压缩

2014 IEEE Computers, Communications and IT Applications Conference Pub Date : 2014-10-01 DOI: 10.1109/ComComAp.2014.7017206

Yanwen Wang, Xiaoyu Li, Xiaoling Wu, Zhangbing Zhou, Hainan Chen

引用次数: 0

Energy-saving analysis of Cloud workload based on K-means clustering 基于k均值聚类的云工作负载节能分析

2014 IEEE Computers, Communications and IT Applications Conference Pub Date : 2014-10-01 DOI: 10.1109/ComComAp.2014.7017215

Qingxin Xia, Yuqing Lan, Liang Zhao, Limin Xiao

引用次数: 6

Queuing-theoretical multi-user dynamic spectrum allocation & sharing mechanism in multi-channel cognitive radio networks 多信道认知无线电网络中排队理论多用户动态频谱分配与共享机制

2014 IEEE Computers, Communications and IT Applications Conference Pub Date : 2014-10-01 DOI: 10.1109/ComComAp.2014.7017185

Long Zhang, Liusheng Huang, Hongli Xu

{"title":"Queuing-theoretical multi-user dynamic spectrum allocation & sharing mechanism in multi-channel cognitive radio networks","authors":"Long Zhang, Liusheng Huang, Hongli Xu","doi":"10.1109/ComComAp.2014.7017185","DOIUrl":"https://doi.org/10.1109/ComComAp.2014.7017185","url":null,"abstract":"Recently, cognitive radio has been proposed to improved the spectrum resource utilization efficiency. The secondary users (SUs) are allowed to sense, detect and access the frequency bands that are not currently being in use by primary users (PUs). In fact, SUs always have no knowledge about PUs' exact communication mechanism. In order to guarantee PUs' communication quality of service (QoS) and satisfy SUs' demand of using spectrum resource, it is a challenging task to find the spectrum sensing and access mechanism. When there are multiple SUs and multiple channels, the spectrum allocation and spectrum sharing must be considered. In this paper, we propose a multi-user spectrum allocation and multi-channel spectrum sharing mechanism for the SUs confronting with unknown primary behavior and study the interference to PUs caused by their dynamic access. The interference caused by SUs was analysis utilizing the Renewal Theory. Under the constraints of the interference to PUs and the secondary network's stability, the queuing theory is utilized to obtain the maximum average data rate of SUs. Through lots of simulations, we verify the effectiveness of our analysis.","PeriodicalId":422906,"journal":{"name":"2014 IEEE Computers, Communications and IT Applications Conference","volume":"96 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115135807","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: 5

High-temperature electrode faulted diagnosis for copper electrolytic cell 铜电解槽高温电极故障诊断

2014 IEEE Computers, Communications and IT Applications Conference Pub Date : 2014-10-01 DOI: 10.1109/ComComAp.2014.7017168

Yiding Wang, Di Zhang, Xiaoyu Zhang, Wen-Rui Wu

引用次数: 1

TOPS: Two-phase scheduling for distributed real-time systems 分布式实时系统的两阶段调度

2014 IEEE Computers, Communications and IT Applications Conference Pub Date : 2014-10-01 DOI: 10.1109/ComComAp.2014.7017186

Mohammed I. Alghamdi, Xunfei Jiang, X. Qin, Jifu Zhang, Minghua Jiang, Meikang Qiu

引用次数: 1