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2009 IEEE International Conference on Intelligent Computing and Intelligent Systems最新文献

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Clustering-based selection for evolutionary multi-objective optimization 基于聚类的进化多目标优化选择
Pub Date : 2009-12-28 DOI: 10.1109/ICICISYS.2009.5357850
Maoguo Gong, L. Jiao, Chao Liu
In this study, a novel clustering-based selection strategy of nondominated individuals for evolutionary multi-objective optimization is proposed. The new strategy partitions the nondominated individuals in current Pareto front adaptively into desired clusters. Then one representative individual will be selected in each cluster for pruning nondominated individuals. In order to evaluate the validity of the new strategy, we apply it into one state of the art multi-objective evolutionary algorithm. The experimental results based on thirteen benchmark problems show that the new strategy improves the performance obviously in terms of breadth and uniformity of nondominated solutions.
本文提出了一种基于聚类的非优势个体进化多目标优化选择策略。该策略自适应地将当前帕累托前沿的非支配个体划分为期望簇。然后在每个聚类中选择一个具有代表性的个体进行非劣势个体的剪枝。为了评估新策略的有效性,我们将其应用于目前最先进的多目标进化算法中。基于13个基准问题的实验结果表明,新策略在非支配解的广度和均匀性方面明显提高了性能。
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引用次数: 3
On the computational complexity of the reachability problem in UML activity diagrams UML活动图中可达性问题的计算复杂性
Pub Date : 2009-12-28 DOI: 10.1109/ICICISYS.2009.5358318
Xing Tan, M. Gruninger
The reachability problem, the problem of checking whether certain node can be reached from some initial settings such that all restrictions on flow of control are satisfied, arises frequently in various applications of Unified Modeling Language activity diagrams. However, the complexity of the problem, or in fact the complexity of any general problem in UML activity diagrams, has yet to be investigated. Towards this initiative, we specify a class of diagrams where the reachability problem is PSPACE-complete. However, if one further condition is applied, it can be shown that the problem is NP-complete.
在统一建模语言活动图的各种应用中经常出现可达性问题,即检查是否可以从一些初始设置到达某个节点,从而满足控制流的所有限制。然而,问题的复杂性,或者实际上UML活动图中任何一般问题的复杂性,还有待研究。对于这个计划,我们指定了一类图,其中可达性问题是PSPACE-complete的。然而,如果再加一个条件,就可以证明问题是np完全的。
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引用次数: 4
Quaternion-based direct adaptive fuzzy predictive control for attitude tracking of satellites 基于四元数的卫星姿态跟踪直接自适应模糊预测控制
Pub Date : 2009-12-28 DOI: 10.1109/ICICISYS.2009.5358342
Ye-rong Zhou, W. Huo
A direct adaptive fuzzy predictive control method is presented for attitude tracking of satellites with model uncertainty and external disturbances in this paper. Firstly, a nonlinear predictive control law for general mechanical systems is derived. Then, the error in predictive control law from system model uncertainties are approximated and compensated by constructed adaptive fuzzy logic systems, and stability of the closed-loop system is proved. Finally, the satellite attitude tracking error equation is formulated with quaternion and the proposed direct adaptive fuzzy control law is applied to realize desired attitude tracking. Simulation results show the satisfied control accuracy and robustness of the proposed method.
针对具有模型不确定性和外界干扰的卫星姿态跟踪问题,提出了一种直接自适应模糊预测控制方法。首先,推导了一般机械系统的非线性预测控制律。然后,利用构造的自适应模糊逻辑系统对系统模型不确定性引起的预测控制律误差进行逼近和补偿,证明了闭环系统的稳定性。最后,利用四元数建立了卫星姿态跟踪误差方程,并应用所提出的直接自适应模糊控制律实现了理想的姿态跟踪。仿真结果表明,该方法具有良好的控制精度和鲁棒性。
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引用次数: 3
A method of same frequency interference suppression based on QRD-LS algorithm 基于QRD-LS算法的同频干扰抑制方法
Pub Date : 2009-12-28 DOI: 10.1109/ICICISYS.2009.5358221
Xianwei Zhang, Z. Ren, Guang Chen, Zhang Tao
The same frequency interference (including direct coupling wave of receiving and transmitting antennas, direct surface reflection wave), because of its strong energy, has great effect for the target signal of a near field transient active electromagnetic detection system. This interference has the same frequency as target signal, and is generally bigger than the target signal, so, it is of great harm to the detection system's normal operation. In this paper, the traditional methods of same frequency interference elimination are analyzed, and the working principle of adaptive RLS(Recursive Least Square) filter is presented, then a new method of same frequency interference suppression which is based on recursive QRD-LS algorithm is put forward. The method has fast convergence speed; low operation amount and can realize real-time processing. The simulation results show that this method can effectively suppress the same frequency interference, and improve the SIR (Signal to Interference Radio) of the target signal. Moreover, the method has a good applicability for the local aberration of the same frequency interference and the changes of its amplitude and time-delay.
同频干扰(包括收发射天线直接耦合波、直接表面反射波)由于能量强,对近场瞬态主动电磁探测系统的目标信号影响很大。这种干扰与目标信号频率相同,且一般大于目标信号,因此对检测系统的正常工作危害很大。分析了传统的同频干扰抑制方法,介绍了自适应RLS(递归最小二乘)滤波器的工作原理,提出了一种基于递归QRD-LS算法的同频干扰抑制方法。该方法收敛速度快;处理量小,可实现实时处理。仿真结果表明,该方法能有效抑制同频干扰,提高目标信号的SIR (Signal to interference Radio)。该方法对同频干扰的局部像差及其幅值和时延的变化具有较好的适用性。
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引用次数: 0
A functional network modeling approach for function series expansion 函数级数展开的函数网络建模方法
Pub Date : 2009-12-28 DOI: 10.1109/ICICISYS.2009.5357924
Qifang Luo, Yongquan Zhou, Xiuxi Wei
In this paper, a novel function series expansion method based on functional network model is proposed, and a functional network model for functions in several variables series expansion and learning algorithm are given, the learning of parameters of the functional networks is carried out by the solving linear equations. The simulation results show that the proposed approach is more efficient and feasible in function series expansion. By this algorithm, we only need the sample space of the original functions. So this algorithm has the value of application in industries.
本文提出了一种基于泛函网络模型的函数级数展开方法,给出了多变量函数级数展开的泛函网络模型和学习算法,通过求解线性方程实现了函数网络参数的学习。仿真结果表明,该方法在函数级数展开中具有较高的效率和可行性。通过该算法,我们只需要原始函数的样本空间。因此,该算法具有一定的工业应用价值。
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引用次数: 0
Knowledge extraction model for power load characteristics of special days and extreme weather 特殊天气和极端天气下电力负荷特性的知识提取模型
Pub Date : 2009-12-28 DOI: 10.1109/ICICISYS.2009.5357793
Dou Quansheng, Pan Guan-yu, S. Zhongzhi, Yang Bin
Load forecasting is a traditional research field of power system, under normal circumstance, there are great similarities between the similar days, but under the condition of special days and extreme weather, load prediction has some uncertainty. Extraction model for load characteristics of special days and extreme weather was proposed in this paper, coding strategy and genetic operation of traditional genetic algorithm were redefined in the model, the relational rules about relation between power load special days and extreme weather were extracted. At the same time, the credibility of these rules was proven by practice.
负荷预测是电力系统的一个传统研究领域,在正常情况下,相似日之间存在较大的相似性,但在特殊日和极端天气条件下,负荷预测具有一定的不确定性。提出了电力负荷特殊日和极端天气特征提取模型,在模型中重新定义了传统遗传算法的编码策略和遗传操作,提取了电力负荷特殊日和极端天气之间的关系规则。同时,实践也证明了这些规则的可信性。
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引用次数: 3
Dynamic performance analysis of kinematical equivalent 3-RUS+PU swashplate mechanism 运动学等效3-RUS+PU斜盘机构动态性能分析
Pub Date : 2009-12-28 DOI: 10.1109/ICICISYS.2009.5358367
Yulin Yang, Xiongwen Du, Huaxing Yang, Xijuan Guo
A kinematical equivalent mechanism names as 3-RUS+PU paralled mechanism is proposed according to the structure of helicopter non-rotating swashplate mechanism in hingless rotor with Bell-hiller stabilizer bar. Inverse solution is used to get the position analysis of this mechanism. By virtual mechanism method, influence coefficient matrices of this mechanism are given, and the correctness is validated by differential method. With considering the size and mass of mechanism, the atlas of acceleration performance indices and inertia force performance indices are got. From the atlas, the better size with better performance indices is chosen by using the trend between the value of performance indices and the size of mechanism.
针对直升机无铰旋翼不旋转斜盘机构带钟式稳定杆的结构,提出了一种运动等效机构3-RUS+PU并联机构。采用逆解法对该机构进行了位置分析。利用虚拟机构法,给出了该机构的影响系数矩阵,并用微分法验证了其正确性。在考虑机构尺寸和质量的情况下,得到了机构的加速度性能指标和惯性力性能指标图谱。利用性能指标值与机构尺寸之间的变化趋势,从图集中选择性能指标较好的机构尺寸。
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引用次数: 0
An agent-based data access mechanism of mobile device 基于代理的移动设备数据访问机制
Pub Date : 2009-12-28 DOI: 10.1109/ICICISYS.2009.5358198
Xu-huai Hu, Jing-cheng Ouyang
This paper proposes an agent-based data access mechanism of mobile device. In the mechanism, mobile device use agents to manage local database and connect to remote agent. Remote agent receives data and query remote database. The local database is designed using partial detailed concept. The partial detailed database can store different details of content for query to avoid unnecessary connection to reduce local memory space, data flow, and energy. The performance evaluation is conducted to demonstrate the effectiveness of the remote data access. An implementation of proposed mechanism also shows that the mechanism is suitable for the mobile computing environment.
提出了一种基于agent的移动设备数据访问机制。在该机制中,移动设备使用代理来管理本地数据库并连接到远程代理。远程代理接收数据并查询远程数据库。局部数据库采用局部细节概念设计。部分详细数据库可以存储不同内容的详细信息以供查询,避免不必要的连接,减少本地内存空间、数据流和能量。通过性能评估来验证远程数据访问的有效性。该机制的实现也表明该机制适用于移动计算环境。
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引用次数: 0
Decision making of logistics project basing on unascertained theory and fuzzy method 基于未确知理论和模糊方法的物流项目决策
Pub Date : 2009-12-28 DOI: 10.1109/ICICISYS.2009.5357961
Xiao Mei-dan
Study on logistics project risk will give helpful information for managers to make decision or manage risk. Therefore, it is meaningful to evaluate the logistics project risk. This paper gives evaluation indexes system of logistics risk firstly, Then combines the unascertained theory with fuzzy method, and gives the evaluation model of logistic project risk basing on unascertained theory and fuzzy method, firstly the risk probability and risk loss are given by using the unascertained theory and fuzzy method respectively, then the whole risk of logistics project is given according to the mean of risk. And the application of the comprehensive evaluation model is given, which combines the quantitative analysis with qualitative analysis and the model is effective and system to evaluate risk, and is useful for managers to manage risk of logistic project.
对物流项目风险的研究将为管理者进行决策或风险管理提供有益的信息。因此,对物流项目风险进行评估具有重要意义。本文首先给出了物流风险的评价指标体系,然后将未确知理论与模糊方法相结合,给出了基于未确知理论和模糊方法的物流项目风险评价模型,首先利用未确知理论和模糊方法分别给出了物流项目的风险概率和风险损失,然后根据风险均值给出了物流项目的整体风险。并给出了综合评价模型的应用,该模型将定量分析与定性分析相结合,能够有效、系统地评价物流项目的风险,为管理者管理物流项目的风险提供了参考。
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引用次数: 0
Multiscale wavelet decomposition based functional autoregression for monthly anchovy catches forecasting 基于多尺度小波分解的函数自回归预测凤尾鱼月渔获量
Pub Date : 2009-12-28 DOI: 10.1109/ICICISYS.2009.5357795
Nibaldo Rodríguez, E. Yañez
In this paper, a multi-scale stationary wavelet decomposition technique combined with functional auto-regression is used to improve the prediction accuracy and parsimony of anchovy monthly catches forecasting in area north of Chile (18 21'S-24 S). The general idea behind this approach is to decompose the observed anchovy catches data into low frequency (LF) component and high frequency (HF) component by using stationary wavelet transform and to separately forecast each frequency component. The forecasting strategy was evaluated for a period of 42 years, starting from 1-Jun-1963 to 31-Dec-2007 and we find that the proposed forecasting method achieves a 98% of the explained variance with a reduced parsimony and high accuracy. Besides, is showed that the wavelet-autoregressive forecaster is more accurate and performs better than both multilayer perceptron neural network model and functional autoregressive model.
本文采用多尺度平稳小波分解与函数自回归相结合的方法,提高了智利北部地区(18 21 -24 S)鳀鱼月捕鱼量预报的精度和精简性。该方法的基本思想是将观测到的鳀鱼捕鱼量数据利用平稳小波变换分解为低频(LF)分量和高频(HF)分量,并分别对各频率分量进行预报。对1963年6月1日至2007年12月31日42年的预测策略进行了评估,结果表明,该预测方法可达到98%的解释方差,且具有较低的简约性和较高的准确性。结果表明,与多层感知器神经网络模型和泛函自回归模型相比,小波自回归模型具有更高的预测精度和更好的预测效果。
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引用次数: 0
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2009 IEEE International Conference on Intelligent Computing and Intelligent Systems
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