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2008 IEEE International Symposium on Knowledge Acquisition and Modeling Workshop最新文献

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StreamLiner: A General-Purpose Interactive Course-Visualization Tool StreamLiner:一个通用的交互式课程可视化工具
Pub Date : 2008-12-01 DOI: 10.1109/KAMW.2008.4810641
S. Yuan, A. Tabard, W. Mackay
We present StreamLiner, originally developed as an interactive `focus+context' tool for visualizing biologists' laboratory notebooks and other time-based activities, both online and off-line. We describe how to adapt StreamLiner as a teaching tool for biology students: Streamliner provides a unified way to visualize any type of stream, including the course calendar (lectures, labs, homework, exams), external events (seminars, meetings, office hours) and work produced by the course participants (student assignments, professors' comments, blogs, wikis and group projects). We used course data from two four-month degree programs that taught biology students about computer programming. Three professors identified how key features of StreamLiner would help both students and professors and suggested additional ideas for improvement. We argue that the StreamLiner approach offers a new way of managing diverse course data and can act as a general-purpose, interactive, course-visualization tool.
我们介绍StreamLiner,最初是作为一个交互式的“焦点+上下文”工具开发的,用于可视化生物学家的实验室笔记本和其他基于时间的活动,包括在线和离线。我们描述了如何适应StreamLiner作为生物学学生的教学工具:StreamLiner提供了一种统一的方式来可视化任何类型的流,包括课程日历(讲座,实验室,作业,考试),外部事件(研讨会,会议,办公时间)和课程参与者(学生作业,教授的评论,博客,维基和小组项目)产生的工作。我们使用了两个为期四个月的学位课程的课程数据,这些课程教授生物学学生计算机编程。三位教授确定了StreamLiner的关键功能将如何帮助学生和教授,并提出了其他改进意见。我们认为,StreamLiner方法提供了一种管理各种课程数据的新方法,可以作为通用的、交互式的课程可视化工具。
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引用次数: 7
Design and Implementation of Web-based Course In Music Environment 音乐环境下网络课程的设计与实现
Pub Date : 2008-12-01 DOI: 10.1109/KAMW.2008.4810694
Jixin Wang, Xuan Wu, K. Chen, Yanmei Ma
Music was an effective approach to awaken the students' happy emotion and was the key to open the students' heart door. It was helpful for the learner to calm down, relieve the worry and enhance the study efficiency. With this, It was widely applied in all kinds of places. The Web-based course had received people's more and more favors because it provided more study opportunities, the richer the learning resources is and the more flexible learning environment. This paper first proposed the hypothesis of introducing music into Web-based course. Then the research about the feasibility of Web-based course was carried out. Finally, the concrete design and implementation of Web-based course in music environment was described in details. As a result, the proposed method could provide a comfortable learning environment for the online learner, and enable the learners to reach the best effect in study.
音乐是唤醒学生快乐情绪的有效途径,是打开学生心灵大门的钥匙。这有助于学习者冷静下来,减轻烦恼,提高学习效率。因此,它被广泛应用于各种地方。网络课程因其提供了更多的学习机会、更丰富的学习资源和更灵活的学习环境而越来越受到人们的青睐。本文首先提出了将音乐引入网络课程的设想。然后对网络课程的可行性进行了研究。最后,详细阐述了音乐环境下网络课程的具体设计与实现。因此,所提出的方法可以为在线学习者提供一个舒适的学习环境,使学习者在学习中达到最佳效果。
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引用次数: 0
Design and Implementation of Universal Industry Data Collecting and Controlling System 通用工业数据采集与控制系统的设计与实现
Pub Date : 2008-12-01 DOI: 10.1109/KAMW.2008.4810411
Han Bing, Fang Ying-lan, Li Ye-bai
Based on existing industry automated system, this paper has introduced a kind of solution for implementing signal collection and controlled different subsystem to achieve system network and run harmony and control intelligent. The system is kernel on 8051 single chip which has realized data collection and system monitoring to various system lower machine. The system's hardware design has based on character of device in existence. The system has imported 485 bus specifications and made super long distance communication to realize and reduced bus density and improved system reliability. It will provide reliable safeguard for corporation to realize network automation control and well roof to future secondary exploitation and functional expander.
本文在现有工业自动化系统的基础上,提出了一种实现信号采集和控制各子系统的方案,以实现系统网络化、协调运行和控制智能化。该系统以8051单片机为核心,实现了对各系统下位机的数据采集和系统监控。系统的硬件设计是根据现有设备的特点进行的。系统采用进口485总线规格,实现超长距离通信,降低了总线密度,提高了系统可靠性。为企业实现网络自动化控制和井顶对未来二次开采和功能拓展提供可靠保障。
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引用次数: 1
ESCAL: An Energy-Saving Clustering Algorithm Based on LEACH ESCAL:基于LEACH的节能聚类算法
Pub Date : 2008-12-01 DOI: 10.1109/KAMW.2008.4810509
Chao Jing, T. Gu, Liang Chang
The application of wireless sensor network (WSN) is always restricted by the energy shortage of sensor nodes. In order to reduce the entire energy consumption of the WSN, a promising approach is to design light clustering algorithms. LEACH is such a well-known clustering algorithm that was designed to distribute the energy consumption to nodes in the WSN evenly. LEACH is characterized by its attractive cluster-based strategy; however, in the algorithm, energy dissipation of entire network is still great during the process that cluster-heads (CH) transmit data to base station (BS). In this paper, based on LEACH, we propose a modified clustering algorithm which is named ESCAL. In ESCAL, CHs won't communicate with BS directly, but transfer aggregated data to the nearest node in term of received signal strength; then this selected nearest node will compress and forward the data to BS. According to this mechanism, the transmitting distance between CHs and the base station is greatly shortened, and therefore the energy dissipation of entire network will be remarkably reduced. Theoretical analysis and experimental simulation demonstrate that the energy dissipation of ESCAL is no more than half of that of LEACH.
无线传感器网络的应用一直受到传感器节点能量不足的制约。为了降低无线传感器网络的整体能耗,设计轻聚类算法是一种很有前途的方法。LEACH是一种著名的聚类算法,其目的是将能量消耗均匀地分配到WSN的节点上。LEACH的特点是其具有吸引力的集群策略;然而,在该算法中,簇头(CH)向基站(BS)传输数据的过程中,整个网络的能量消耗仍然很大。本文在LEACH算法的基础上,提出了一种改进的ESCAL聚类算法。在ESCAL中,CHs不直接与BS通信,而是根据接收到的信号强度将聚合数据传输到最近的节点;那么这个选择的最近的节点将压缩并转发数据到BS。根据这种机制,CHs与基站之间的传输距离大大缩短,从而大大降低了整个网络的能量耗散。理论分析和实验模拟表明,ESCAL的能量耗散不超过LEACH的一半。
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引用次数: 14
GBSB MODEL for MIMO Channel AND its Space-time CORRELATION Analysis in Tunnel 隧道中MIMO信道的GBSB模型及其空时相关分析
Pub Date : 2008-12-01 DOI: 10.1109/KAMW.2008.4810465
Zheng Hong-dang, Nie Xiao-yan
Aiming at the special space in the tunnel, this paper assumes the geometric distribution of scatterers which is totally different from on the ground, puts forward a new GBSB model of MIMO channel and deduces the space-time correlation function of the model. The results of theoretical analysis and simulation show that the model can more accurately reflect the factors which impact the channel correlation in the tunnel.
针对隧道中的特殊空间,假设了与地面完全不同的散射体几何分布,提出了一种新的MIMO信道GBSB模型,并推导了该模型的时空相关函数。理论分析和仿真结果表明,该模型能较准确地反映隧道中影响通道相关性的因素。
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引用次数: 8
Dynamic Performance Improving of MEMS Sensor By Gas Damping Structure 用气体阻尼结构改善MEMS传感器动态性能
Pub Date : 2008-12-01 DOI: 10.1109/KAMW.2008.4810617
Liwei Li, R. Zhu, Zhaoying Zhou, Jian-xing Ren
For MEMS sensors with movable planar components, the gas damping structure can be used to reduce the oscillation of sensing structure and tune the quality factor of the dynamic system, furtherly improve the performance of these sensors. This paper deals with the application of two main gas damping structure: parallel plate and perforated plate in MEMS sensors. The dynamic behavior prediction of such two damping structure based on Reynolds' govern equation has been introduced accordingly to control the dynamic performance of sensing system. The parallel damping plates are the basic structures which are able to reduce vibration and increase the quality factors of micro sensors such as accelerometers and gyroscope and so on. The gas damping effects of parallel plate can be predicted by means of conventional Reynolds' equation. The perforated damping plates are another structures which can reduce the squeeze-film effects furtherly. Although perforating holes in microstructures can reduce the damping effects caused by horizontal air flow, the air flow escaping through perforated holes adds new viscous resistance. Therefore, the conventional Reynolds' equation for determining squeeze-film damping effects of non-perforated planar structures is no longer applicable. The modified Reynolds' equation (MRE) can be employed to analyze gas damping effects of perforated plates for small amplitude vibration.
对于平面可动元件的MEMS传感器,采用气体阻尼结构可以减小传感结构的振荡,调节动态系统的品质因子,进一步提高传感器的性能。本文讨论了两种主要的气体阻尼结构:平行板和穿孔板在MEMS传感器中的应用。为了控制传感系统的动态性能,引入了基于Reynolds控制方程的两种阻尼结构的动态性能预测。并联阻尼板是减轻加速度计、陀螺仪等微传感器振动、提高其质量因数的基本结构。平行板的气体阻尼效应可以用传统的雷诺方程来预测。穿孔阻尼板是另一种可以进一步减小挤压膜效应的结构。虽然在微结构中打孔洞可以减少水平气流的阻尼作用,但从孔洞中逸出的气流增加了新的粘滞阻力。因此,确定非穿孔平面结构挤压膜阻尼效应的传统Reynolds方程不再适用。修正的雷诺方程(MRE)可用于分析多孔板在小振幅振动下的气体阻尼效应。
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引用次数: 1
The application of Cluster analysis in Library system 聚类分析在图书馆系统中的应用
Pub Date : 2008-12-01 DOI: 10.1109/KAMW.2008.4810639
Jianwei Li, Pinghua Chen
With the constant development of modern library, the function of library has changed gradually. How to improve the utilization rate of library resources, how to serve readers better, and how to play more active roles, all have been becoming the concrete task of library in future. Clustering analysis is the process of grouping a set of physical abstract objects into classes of similar objects, and it has a very good application in library. The clustering analysis of readers' behavior features in library automation system helps library improve services quality greatly, provide effective decision-making support for resource optimization, provide personalized information services for readers, and made library play more active roles in serving readers.
随着现代图书馆的不断发展,图书馆的职能也逐渐发生了变化。如何提高图书馆资源的利用率,如何更好地为读者服务,如何发挥更积极的作用,已成为图书馆今后的具体任务。聚类分析是将一组物理抽象对象归类为相似对象的过程,在图书馆中有很好的应用。对图书馆自动化系统中读者行为特征进行聚类分析,有助于图书馆极大地提高服务质量,为资源优化提供有效的决策支持,为读者提供个性化的信息服务,使图书馆在为读者服务方面发挥更积极的作用。
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引用次数: 4
Application of Hybrid Method to the Quasi-Periodic Analysis of Micro Gas Journal Bearing System 混合方法在微气体滑动轴承系统准周期分析中的应用
Pub Date : 2008-12-01 DOI: 10.1109/KAMW.2008.4810429
Cheng-Chi Wang, H. Yau, Chen-Feng Kuan, Jun‐Juh Yan
This paper employs a hybrid numerical method combining the differential transformation method and the finite difference method to study the dynamic behavior of a rigid rotor supported by a micro gas journal bearing system. The analytical results reveal a complex dynamic behavior comprising periodic, sub-harmonic, and quasi-periodic responses of the rotor center. Furthermore, the results reveal the changes which take place in the dynamic behavior of the bearing system as the rotor mass is increased. The current analytical results are found to be in good agreement with those of other numerical methods. Therefore, the proposed method provides an effective means of gaining insights into the nonlinear dynamics of micro gas film rotor-bearing systems.
本文采用微分变换法和有限差分法相结合的混合数值方法研究了微气体轴颈轴承系统支承刚性转子的动力学行为。分析结果表明,转子中心具有周期响应、次谐波响应和准周期响应的复杂动态特性。此外,研究结果还揭示了转子质量增大时轴承系统动态特性的变化。目前的分析结果与其他数值方法的结果吻合较好。因此,所提出的方法为深入了解微气膜转子-轴承系统的非线性动力学提供了有效的手段。
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引用次数: 3
A New Method to Achieve Fuzzy Set Transformation in Fuzzy Logic System 模糊逻辑系统中实现模糊集变换的一种新方法
Pub Date : 2008-12-01 DOI: 10.1109/KAMW.2008.4810481
Li Kaidi, Hao Jimei, Huang Rui
The core of fuzzy logic system is fuzzy inference machine, which realizes the transformation of fuzzy set from universe of discourse U to universe of discourse V. The fuzzy set transformation is membership transformation. However, there is redundancy in the existing algorithms of membership transformation. In order to construct a membership transformation method in which there is not interfering by redundant data, this paper excavates the information of the object classification that hides in index membership to define the divisional right, this data excavation method is based on entropy; Use distinguishable weight as a filter to delete redundant index membership that are useless for classification, and extract effective value in index membership that is useful for classification; Then transform effective value to comparable value and generate comparable sum; At last define object membership by comparable sum. Based on this, a new method to achieve transformation of fuzzy set can be realized without the interference of redundant data, and the following case can illustrate the algorithm application.
模糊逻辑系统的核心是模糊推理机,它实现了模糊集从论域U到论域v的转换,模糊集的转换就是隶属变换。然而,现有的隶属度变换算法存在冗余。为了构造一种不受冗余数据干扰的隶属度变换方法,挖掘隐藏在索引隶属度中的对象分类信息来定义分权,该数据挖掘方法是基于熵的;利用可区分权值作为过滤器,删除多余的对分类无用的索引隶属度,提取索引隶属度中对分类有用的有效值;然后将有效价值转化为可比价值,生成可比总和;最后用可比和定义对象的隶属度。在此基础上,实现了一种不受冗余数据干扰的模糊集变换新方法,下面的实例可以说明该算法的应用。
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引用次数: 0
A new Method of Modeling and Simulation for DSSS Communications System Based on Software Radio 基于软件无线电的DSSS通信系统建模与仿真新方法
Pub Date : 2008-12-01 DOI: 10.1109/KAMW.2008.4810603
Wu Ding-xue, Fan Wen-ping
This paper probe into a new method of modeling and simulation for direct-sequence spread spectrum (DSSS) communications system based on software radio. The simulation result shows that the DSSS communication system that uses software radio technology do have good anti-interference ability. Even there is much interference, the normal communication can be still guaranteed.
探讨了一种基于软件无线电的直接序列扩频(DSSS)通信系统建模与仿真的新方法。仿真结果表明,采用软件无线电技术的DSSS通信系统具有良好的抗干扰能力。即使有很多干扰,也能保证正常通信。
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引用次数: 0
期刊
2008 IEEE International Symposium on Knowledge Acquisition and Modeling Workshop
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