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2014 4th IEEE International Conference on Information Science and Technology最新文献

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A cooperative modeling scheme between power transformer substation and control center 一种电力变电站与控制中心协同建模方案
Pub Date : 2014-04-26 DOI: 10.1109/ICIST.2014.6920350
Zhang Jiaan, X. Tao, Liang Wei, Xu Sheng, Guo Lingxu, H. Zhigang, Fan Guangmin
To meet the requirements for power grid data sharing and model maintenance, this paper proposes a cooperative modeling scheme between transformer substations and the control center. The implementation is based on chartmodel integration in which power grid data and graphics are described interactively. The models cover the standards of the 61850 and 61970. The SCL described substation configurations such as ICD, SCD, SSD and CID files may be derived from the integrated model for intelligent substation assembling. The CIM model and the SVG graphics may be also derived from it. The integrated model is applicable for substation modeling and grid model merging. The scheme facilitates the power grid data sharing and the equipment model maintenance both in the substation and the control center.
为满足电网数据共享和模型维护的要求,提出了变电站与控制中心的协同建模方案。其实现基于图表模型集成,对电网数据和图形进行交互描述。该模型涵盖61850和61970的标准。SCL描述的变电站配置(如ICD、SCD、SSD和CID文件)可以从智能变电站装配集成模型中导出。CIM模型和SVG图形也可以从它派生出来。该集成模型适用于变电站建模和电网模型合并。该方案便于变电站和控制中心的电网数据共享和设备模型维护。
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引用次数: 3
Conflict types and probabilities in stochastic TM-programs 随机tm程序中的冲突类型和概率
Pub Date : 2014-04-26 DOI: 10.1109/ICIST.2014.6920322
M. Popovic, I. Basicevic
Transactional Memory (TM) is an attractive concurrency control mechanism that should deliver much better performance than locks in case when transaction conflicts are rare. But, if the probability of conflicts is high, TM program performance may be very poor. Therefore, when engineering mission critical systems, we need to be able to calculate conflict probabilities. In this paper we study a class of stochastic TM programs for processing groups of transactions on a set of shared t-variables, e.g. bank accounts. Individual transactions are selecting variables they are operating on uniformly at random. We identify and define various types of conflicts among transactions that may arise in such circumstances. We also show how to calculate probabilities of various types of conflicts on some simple examples of groups of transactions sharing one or two t-variables. Our work is still in progress, but the results shown here are affirmative for the approach we use, and they stimulate further research towards more general analysis of this class of TM programs.
事务内存(Transactional Memory, TM)是一种很有吸引力的并发控制机制,在事务冲突很少的情况下,它应该比锁提供更好的性能。但是,如果冲突的概率很高,则TM程序的性能可能会很差。因此,在设计关键任务系统时,我们需要能够计算冲突概率。本文研究了一类随机TM程序,用于处理一组共享t变量(如银行账户)上的交易组。单个事务是在随机选择它们统一操作的变量。我们识别并定义在这种情况下可能出现的各种类型的交易冲突。我们还展示了如何在共享一个或两个t变量的事务组的一些简单示例上计算各种类型冲突的概率。我们的工作仍在进行中,但这里显示的结果肯定了我们使用的方法,并且它们刺激了对这类TM程序的更一般分析的进一步研究。
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引用次数: 3
A new discrete eel swarm intelligence algorithm 一种新的离散鳗鱼群智能算法
Pub Date : 2014-04-26 DOI: 10.1109/ICIST.2014.6920601
Sun Yao-sheng, Huang Zhang-can, Chen Yu, Yu-Te Chao
Inspired by the migration behaviours of eels, we propose a new discrete eel swarm intelligence algorithm in this paper. First, this paper analyzes the behaviours of eels, then establishes a mathematical model of the important behaviour being extracted. Based on rational organization of three important behaviours of eel, namely concentration adaptation, neighbourhood learning and gender mutation, the discrete eel swarm intelligence algorithm is proposed for combinatorial optimization problems. Finally, numerical experiments on the TSP problem and the permutation flow-shop scheduling problem show that the algorithm has strong optimization capability and accuracy.
本文受鳗鱼迁移行为的启发,提出了一种新的离散鳗鱼群智能算法。本文首先分析了鳗鱼的行为,然后建立了提取重要行为的数学模型。在合理组织鳗鲡集中适应、邻域学习和性别突变三种重要行为的基础上,提出了用于组合优化问题的离散鳗鲡群智能算法。最后,对TSP问题和置换流水车间调度问题进行了数值实验,结果表明该算法具有较强的优化能力和精度。
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引用次数: 0
Control of a two-wheeled self-balancing robot with support vector regression method 基于支持向量回归法的两轮自平衡机器人控制
Pub Date : 2014-04-26 DOI: 10.1109/ICIST.2014.6920404
Liangliang Cui, Y. Ou, Junbo Xin, Dawei Dai, Xiang Gao
Recently, learning based control is a popular topic on robotic applications. This paper presents a novel learning based intelligent control method which realizes the balance control of a statically unstable and dynamically stable robot - a two-wheeled self-balancing robot. The control strategy could be segmented into two levels: a learning based controller using Support Vector Regression approach as a high level and a traditional PD controller as a low level. Support Vector Regression is utilized to learn the mapping between robot's state data and corresponding actions from experiments by using the inclined angle and its angular speed as inputs and the wheels velocity of the robot needed to keep balance as outputs. And the low level PD controller makes sure the motors achieve the velocity value gained before. Experiments are taken to show that the control method is useful and efficient. Additionally, this paper presents a practice of learning based control.
近年来,基于学习的控制是机器人应用领域的一个热门课题。提出了一种新的基于学习的智能控制方法,实现了静不稳定和动态稳定两种机器人——两轮自平衡机器人的平衡控制。控制策略可以分为两个级别:基于学习的控制器使用支持向量回归方法作为高级别,传统PD控制器作为低级别。利用支持向量回归,以机器人的倾斜角及其角速度为输入,以机器人保持平衡所需的车轮速度为输出,从实验中学习机器人状态数据与相应动作之间的映射关系。低电平PD控制器确保电机达到之前得到的速度值。实验结果表明,该控制方法是有效的。此外,本文还提出了一种基于学习的控制方法。
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引用次数: 7
Studies on the transducers of clamp-on transit-time ultrasonic flow meter 夹紧式瞬时超声流量计换能器的研究
Pub Date : 2014-04-26 DOI: 10.1109/ICIST.2014.6920360
Jianping Han, Hao Liu, Yuanyuan Zhou, Rumei Zhang, Changji Li
The clamp-on transit-time ultrasonic flow meters are widely applied for the advantage of noninvasive measurement and convenient deployment. Its key point lies on measuring of the time difference between the upstream and downstream. While high quality of the transducer transmitting/receiving ultrasonic signals is the premise of measuring time difference accurately. This paper studies on the main factors contributing to the uncertainty of the transducer's output signal and focuses on the transducer's frequency, incident angle and the separate distance. The selection principle of transducer's frequency is presented by the analysis of the ultrasonic attention characteristics in the liquid. The incident angle range and precise installation distance of the transducers are calculated and analyzed by Snell's law. Experiments are also carried out with the 1MHz transducers clamped on the aluminium pipe of 20mm outer diameter. The results show that the accurate calculation separate distance 18.16mm is effective to guarantee the output of high quality ultrasonic wave. If the axial installation error reaches more than 3mm, the one beam of ultrasonic signal cannot be guaranteed.
夹紧式瞬时超声流量计具有无创测量和使用方便等优点,得到了广泛的应用。其关键在于上游和下游时间差的测量。而高质量的换能器发射/接收超声信号是准确测量时差的前提。本文研究了造成换能器输出信号不确定性的主要因素,重点研究了换能器的频率、入射角和分离距离。通过对液体中超声聚焦特性的分析,提出了换能器频率的选择原则。利用斯涅尔定律计算和分析了传感器的入射角范围和精确安装距离。将1MHz换能器夹在外径20mm的铝管上进行了实验。结果表明,精确计算18.16mm的分离距离可以有效地保证输出高质量的超声波。如果轴向安装误差大于3mm,则无法保证超声信号的一束。
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引用次数: 13
Joint serially concatenated continuous phase modulation and physical-layer network coding 串联连续相位调制与物理层网络编码的联合
Pub Date : 2014-04-26 DOI: 10.1109/ICIST.2014.6920527
Nan Sha, Yuanyuan Gao, Xiaoxin Yi, Wenlong Li, Y. Long
This paper presents a joint physical-layer network coding (PNC) and serially concatenated continuous phase modulation (SCCPM) scheme in a two-way relay (TWR) channel. This proposed scheme can be viewed as a serial concatenated codes (SCCs) scheme in which the joint CPM and PNC is the inner code and the convolutional code (CC) is the outer code. It aims to improve the spectral efficiency, error performance and power efficiency of the PNC system by utilizing the technical advantage of CPM and SCCs. An iterative decoding algorithm for the relay receiver over AWGN channels is investigated. Emphasis is put on the extrinsic logarithmic likelihood ratios (LLRs) of the XORed codewords generated by the soft input soft output (SISO) inner decoder. Simulation results are also provided to show the error performance of the joint scheme.
提出了一种在双向中继信道中实现物理层网络编码(PNC)和串行级联连续相位调制(SCCPM)的联合方案。该方案可以看作是一种串行连接码(SCCs)方案,其中联合CPM和PNC为内码,卷积码(CC)为外码。利用CPM和scc的技术优势,提高PNC系统的频谱效率、误差性能和功率效率。研究了一种基于AWGN信道中继接收机的迭代译码算法。重点研究了由软输入软输出(SISO)内解码器产生的xor码字的外在对数似然比(llr)。仿真结果显示了该联合方案的误差性能。
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引用次数: 0
An adaptive GPU performance and power model 一种自适应的GPU性能和功耗模型
Pub Date : 2014-04-26 DOI: 10.1109/ICIST.2014.6920565
Xiaoke Li, Junmin Wu, Zhibin Yu, Chengzhong Xu, Kai Chen
Benefiting from integrating massive parallel processors, Graphics Processing Units(GPUs) have become prevalent computing devices for general-purpose parallel applications - so called GPGPU computing. While providing powerful computation capability, GPGPUs are power hungry. Almost half of the total amount of a GPGPU-based system power is consumed by GPGPU, which has seriously hindered the application of GPGPUs. As such, it's essential to build an accurate and robust model to analyze the performance and power consumption of GPGPUs. In this paper, we propose an adaptive performance and power consumption model by using random forest algorithm. The model is based on the overall GPU architecture performance counters, including multi-processor, memory access pattern and bandwidth metrics, and adapts to different NVIDIA GPU architectures. The results demonstrate that our model can achieve an average accuracy with prediction error 2.1% and 3.2% for the performance and power consumption, respectively. Furthermore, by identifying the most important impact factors and quantifying their contributions, our proposed approach can help GPGPU programmers and architects get quick insights on the performance and power consumption of GPGPU systems.
得益于集成了大量并行处理器,图形处理单元(gpu)已经成为通用并行应用程序(即GPGPU计算)的流行计算设备。在提供强大的计算能力的同时,gpgpu的功耗也很高。基于GPGPU的系统功耗几乎占到系统总功耗的一半,严重阻碍了GPGPU的应用。因此,有必要建立一个准确而稳健的模型来分析gpgpu的性能和功耗。本文提出了一种基于随机森林算法的自适应性能和功耗模型。该模型基于整体GPU架构性能指标,包括多处理器、内存访问模式和带宽指标,并适应不同的NVIDIA GPU架构。结果表明,该模型对性能和功耗的预测误差分别为2.1%和3.2%,达到平均精度。此外,通过识别最重要的影响因素并量化它们的贡献,我们提出的方法可以帮助GPGPU程序员和架构师快速了解GPGPU系统的性能和功耗。
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引用次数: 1
A ranking algorithm based on contents and non-key attributes for object-level keyword search over relational databases 一种基于内容和非键属性的排序算法,用于关系型数据库的对象级关键字搜索
Pub Date : 2014-04-26 DOI: 10.1109/ICIST.2014.6920333
Jianmin Bao, Huan Wang, Xuan Shen, Gang Cui
Keyword search technique over relational databases is a research hot-spot in database field. At present, there have been many ranking correlation algorithms for object-level keyword search over relational databases. Object-level keyword search can better integrate information scattered in various tuples. OCS(Object-level Correction Sort) algorithm cannot rank results in keyword search accurately as was expected. This paper foucuses on the problems of ranking results in keyword search system for object-level over relational databases and proposes a new ranking algorithm SOCA(Sort of Correction Algorithm) which takes into consideration the content information of key attributes, and the correlation of non-key attributes. We use Weight to evaluate the content information of key attributes, and Correlation to assess the correlation of non-key attributes Finally, we give a score function about contents Correlation and Weight. Experiments demonstrate that this algorithm can effectively rank results and verify its reasonableness and effectiveness.
关系型数据库关键字搜索技术是数据库领域的研究热点。目前,针对关系数据库中对象级关键字搜索,已经出现了许多排序关联算法。对象级关键字搜索可以更好地整合分散在各种元组中的信息。OCS(Object-level Correction Sort,对象级校正排序)算法在关键字搜索中不能按预期对结果进行准确排序。针对对象级关系型数据库关键字搜索系统中的排序问题,提出了一种考虑关键属性内容信息和非关键属性相关性的排序算法SOCA(Sort of Correction algorithm)。我们用权重来评价关键属性的内容信息,用相关性来评价非关键属性的相关性,最后给出了内容相关性和权重的评分函数。实验表明,该算法能有效地对结果进行排序,验证了算法的合理性和有效性。
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引用次数: 0
A BMI-based flashing light recognition system on free-moving rats 基于bmi的自由运动大鼠闪光识别系统
Pub Date : 2014-04-26 DOI: 10.1109/ICIST.2014.6920559
Kedi Xu, Yi Qu, Kang Lin, Xiaoxiang Zheng, Yueming Wang
Research on flashing light stimulus dependence of activity in the visual system is a meaningful supplement to the understanding of visual system of central nervous system (CNS). Meanwhile, the novel method brain machine interfaces (BMIs) makes it possible to read out visual perception and have been applied to separate different visual perception of CNS. The combination of BMIs based visual perception system and rat robot navigation system may be applied to detect the condition of flashing light of unknown environment in the future. In this paper, we introduced a BMI-based system to evaluate the effectiveness of flashing light recognition with neural signal recorded from primary visual cortex of free-moving rats. We first analyzed features of neural signal and found significant difference between Stimulus state and Control state as well as discernible difference between high and low flashing frequencies. The results of average areas under receiver operating characteristic (ROC) curve (AUC) of cross-validation with prediction algorithm reached 0.9238 between high flashing rate stimulation and Control state, 0.8942 between low flashing rate and Control state in dark circumstance.
研究闪烁光刺激对视觉系统活动的依赖性是对中枢神经系统(CNS)视觉系统认识的有益补充。同时,脑机接口(BMIs)方法使视觉感知的读出成为可能,并已被应用于分离不同的中枢神经系统视觉感知。基于bmi的视觉感知系统与大鼠机器人导航系统相结合,可以在未来用于检测未知环境的闪烁状态。本文介绍了一种基于bmi的系统,利用自由运动大鼠初级视觉皮层记录的神经信号来评估闪烁光识别的有效性。我们首先分析了神经信号的特征,发现刺激状态和控制状态之间存在显著差异,高闪频率和低闪频率之间存在明显差异。与预测算法交叉验证的受试者工作特征(ROC)曲线下平均面积(AUC)在高闪率刺激与控制状态下达到0.9238,在黑暗环境下低闪率刺激与控制状态下达到0.8942。
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引用次数: 1
Botnet detecting method based on activity similarity 基于活动相似度的僵尸网络检测方法
Pub Date : 2014-04-26 DOI: 10.1109/ICIST.2014.6920405
Wan Wei, Ling Jun
Botnet as a new technology of attacks is a serious threat to Internet security. With the rapid development of the botnet, botnet based several protocols came into being. In accordance with the activity similarity of botnet, a method has application in botnet detection. Firstly, according to the situation and problems of the botnet recently, the life cycle and behavior characteristics of the botnet have been analyzed. After that a method based on activity similarity has been research to detect if a node is in a botnet. Finally, we analyzed and summarized the experimental results, and verified the reliability and rationality of the detection method.
僵尸网络作为一种新型的攻击技术,严重威胁着网络安全。随着僵尸网络的迅速发展,基于多种协议的僵尸网络应运而生。根据僵尸网络的活动相似性,提出了一种应用于僵尸网络检测的方法。首先,根据近年来僵尸网络的现状和存在的问题,分析了僵尸网络的生命周期和行为特征。在此基础上,研究了一种基于活动相似度的节点是否属于僵尸网络的检测方法。最后对实验结果进行了分析和总结,验证了检测方法的可靠性和合理性。
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引用次数: 0
期刊
2014 4th IEEE International Conference on Information Science and Technology
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