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Third International Conference on Natural Computation (ICNC 2007)最新文献

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Multi-objective Optimization in Partner Selection 合作伙伴选择中的多目标优化
Pub Date : 2007-08-24 DOI: 10.1109/ICNC.2007.485
Xuesen Ma, Jianghong Han, Zhengfeng Hou, Zhenchun Wei
It is a typical multi-objective optimization problem for the scientific decision of bidding to seek cooperating partner in virtual enterprise. With the optimization model proposed, partner selection is solved by the improved genetic algorithm. In the evolution process, individual survive rate is dynamic according to queue of individuals 'fitness values before roulette wheel selection, avoiding premature convergence. Crossover and mutation operators are accordingly adaptive to fitness value and iterative degree, which endows individuals with self- adaptability with the variation of the environment. Finally, the example demonstrates the validity of the adaptive genetic algorithm.
在虚拟企业中寻找合作伙伴是一个典型的多目标优化问题,需要进行科学的投标决策。在提出优化模型的基础上,采用改进的遗传算法求解伙伴选择问题。在进化过程中,个体存活率根据轮盘选择前个体适应度值的队列动态变化,避免过早收敛。交叉和变异算子根据适应度值和迭代度进行自适应,使个体具有适应环境变化的自适应性。最后,通过算例验证了自适应遗传算法的有效性。
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引用次数: 0
Neural Evidence Integration Model and Its Application 神经证据集成模型及其应用
Pub Date : 2007-08-24 DOI: 10.1109/ICNC.2007.494
Shouzhi Wei, N. Jin, Hui Liu
The oilfield remaining oil distribution forecast is called world-level difficult problems by oil domain specialists in the world. The source of low forecast correctness are only consider objective evidences or subjective evidence, so the forecast results still exist limitation, it result in low accuracy, reliability and so on to identify the classification characteristics and to compute quantitative parameters. So, how to fuse all objective evidences and subjective evidences is a key problem to research remaining oil distribution. A new model is proposed, it integrated BP neural networks combination models and two-level D-S evidence reasoning models, the exact classification results are implemented about many remaining oil distribution characteristics. The classification output reliability of each BP network and the reasoning result reliability of each domain fuzzy expert system are regarded as basic probability assignment of input evidence in D-S evidence reasoning model. The model has applied successfully in Daqing Oilfield of China.
油田剩余油分布预测被世界石油领域专家称为世界级难题。预测正确性低的来源仅考虑客观证据或主观证据,因此预测结果仍存在局限性,导致分类特征识别和定量参数计算的准确性、可靠性低等问题。因此,如何融合客观证据和主观证据是研究剩余油分布的关键问题。将BP神经网络组合模型与两级D-S证据推理模型相结合,提出了一种新的模型,实现了多种剩余油分布特征的精确分类结果。在D-S证据推理模型中,将每个BP网络的分类输出可靠性和每个领域模糊专家系统的推理结果可靠性作为输入证据的基本概率分配。该模型已在大庆油田成功应用。
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引用次数: 0
Study of Detection Technique Simulation of High Resolution Radar Based on BP Neural Network 基于BP神经网络的高分辨率雷达探测技术仿真研究
Pub Date : 2007-08-24 DOI: 10.1109/ICNC.2007.684
Hou Xuan, He Mingyi
Technology applying neural network to detection of high resolution radar is advised. Firstly, it analyses the principle of detection technique of high resolution radar and the conception of "distance corridor". Secondly, it introduces the basal principle of BP algorithm. The principle and structure of three layers BP neural network is analysed. Thirdly, the detection technology and algorithm of high resolution radar based on BP neural network is researched. The result of research of target detection technology based on BP neural network possesses superperformance, which is in view of four distance corridor and ten distance corridor, which are the neural network that possesses four input neurons and ten input neurons. At last, the research is carried out by Matlab, the result are visible and understandable.
介绍了将神经网络应用于高分辨率雷达探测的技术。首先,分析了高分辨率雷达探测技术的原理和“距离走廊”的概念;其次,介绍了BP算法的基本原理。分析了三层BP神经网络的原理和结构。第三,研究了基于BP神经网络的高分辨率雷达检测技术和算法。基于BP神经网络的目标检测技术研究结果具有优异的性能,考虑到4个距离走廊和10个距离走廊,即具有4个输入神经元和10个输入神经元的神经网络。最后,利用Matlab进行了研究,结果直观易懂。
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引用次数: 3
A Bio-Inspired Content Adaptive Approach for Multiresolution-Based Image Watermarking 基于多分辨率图像水印的仿生内容自适应方法
Pub Date : 2007-08-24 DOI: 10.1109/ICNC.2007.4
E. Vahedi, C. Lucas, R. Zoroofi, M. Shiva
In this paper, the authors propose a new procedure for copyright protection by using a bio-inspired wavelet based data hiding approach. The proposed method takes advantage of human visual system (HVS) characteristics to provide better watermarked image quality. It also exploits visual secret sharing (VSS) technique to guarantee the security of the procedure. Performance improvement with respect to the existing algorithms is obtained by genetic algorithm (GA) optimization. The experimental results show that the proposed algorithm yields a watermark that is invisible to human eyes and is robust to various intentional and unintentional attacks. The experimental results are also compared with the results of some previous works.
本文提出了一种基于仿生小波数据隐藏的版权保护新方法。该方法利用人类视觉系统(HVS)的特性,提供更好的水印图像质量。利用可视化秘密共享技术保证了过程的安全性。通过遗传算法(GA)优化获得了相对于现有算法的性能改进。实验结果表明,该算法产生的水印是人眼不可见的,并且对各种有意和无意攻击具有较强的鲁棒性。并将实验结果与前人的研究结果进行了比较。
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引用次数: 8
An Effective Hybrid ADP-PSO Strategy for Optimization and Its Application to Face Recognition 一种有效的ADP-PSO混合优化策略及其在人脸识别中的应用
Pub Date : 2007-08-24 DOI: 10.1109/ICNC.2007.188
Yongzhong Lu
In order to distinguish faces of various angles during face recognition, an algorithm of the combination of approximate dynamic programming (ADP) which is called action dependent heuristic dynamic programming (ADHDP) and particle swarm optimization (PSO) is presented and used, that is to say, ADP is applied for dynamically changing the values of the PSO parameters. During the process of face recognition, the discrete cosine transformation (DCT) is first introduced to reduce negative effects. Then K-L transformation can be used to compress images and decrease data dimensions. According to principal component analysis (PCA), main parts of vectors are extracted for data representation. Finally, radial basis function (RBF) neural network is enrolled to recognize various faces. The training of RBF neural network is exploited by ADP-PSO. In terms of ORL face database, the experimental result gives a clear view of its highly accurate efficiency.
为了在人脸识别过程中区分不同角度的人脸,提出并使用了一种将近似动态规划(ADP)与动作依赖启发式动态规划(ADHDP)相结合的算法,即利用ADP动态改变PSO参数的值。在人脸识别过程中,首先引入离散余弦变换(DCT)来减少负面影响。然后利用K-L变换对图像进行压缩,降低数据维数。根据主成分分析(PCA),提取向量的主要部分进行数据表示。最后,利用径向基函数(RBF)神经网络进行人脸识别。利用adp -粒子群算法对RBF神经网络进行训练。在ORL人脸数据库中,实验结果表明该方法具有较高的准确率。
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引用次数: 2
Facial Expression Recognition using AAM and Local Facial Features 基于AAM和局部面部特征的面部表情识别
Pub Date : 2007-08-24 DOI: 10.1109/ICNC.2007.373
Fangqi Tang, Benzai Deng
A new technique for facial expression recognition is proposed, which uses active appearance model (AAM) to extract facial feature points and combines useful local shape features to form a classifier. To enhance performance of AAM, we use Adaboost to locate eye position to initialize AAM. After extraction of facial feature points, we analyze local facial changes and use some simple features to form an effective classifier. At last, we demonstrate our approach by experiments.
提出了一种新的面部表情识别技术,利用主动外观模型(AAM)提取面部特征点,并结合有用的局部形状特征组成分类器。为了提高AAM的性能,我们使用Adaboost定位眼位来初始化AAM。在提取人脸特征点后,对局部人脸变化进行分析,并利用一些简单的特征组成有效的分类器。最后,通过实验对该方法进行了验证。
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引用次数: 35
A Multi-subpopulation Accelerating Genetic Algorithm Based on Attractors (MAGA): Performance in Function Optimization 基于吸引子的多亚种群加速遗传算法:在函数优化中的性能
Pub Date : 2007-08-24 DOI: 10.1109/ICNC.2007.73
Zhiyi Lin, Yuanxiang Li
A multi-subpopulation accelerating genetic algorithm based on attractors(MAGA) is proposed to cope with the drawback of genetic algorithms. MAGA views the excellent individuals as attractors and generates local small populations in the neighbor of them to maintain the diversity of the population. In the course of searching, MAGA constantly shrinks the searching neighbor and uses the accelerating operators to speed up the evolution of MAGA. The convergence analysis shows MAGA can converge to global optimization under some circumstances. Finally, MAGA's efficiency is validated through optimization of two benchmark functions.
针对遗传算法的缺点,提出了一种基于吸引子的多亚种群加速遗传算法。MAGA将优秀的个体视为吸引者,并在他们的邻居中产生本地小种群,以保持种群的多样性。在搜索过程中,MAGA不断缩小搜索邻居,并使用加速算子加速MAGA的进化。收敛性分析表明,在某些情况下,MAGA算法可以收敛到全局最优。最后,通过对两个基准函数的优化验证了MAGA算法的有效性。
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引用次数: 0
Human Face Recognition Based on Principal Component Analysis and Particle Swarm Optimization-BP Neural Network   基于主成分分析和粒子群优化- bp神经网络的人脸识别
Pub Date : 2007-08-24 DOI: 10.1109/ICNC.2007.418
Lei Du, Zhenhong Jia, Liang Xue
This paper proposes an improved face recognition method based on the combination of Principal Component Analysis and Neural Networks. This method adopts Principal Component Analysis (PCA) to abstract principal eigenvectors of the image in order to get best feature description, hence to reduce the number of inputs of neural networks. After this, these image data of reduced dimensions are input into a feed forward neural network to be trained. The weights of neural networks are optimized using Particle Swarm Optimization (PSO) algorithm. Then this well-trained network is tested using samples from standard human face database. The results show that this method gains higher recognition rate in contrast with some other methods.
提出了一种基于主成分分析和神经网络相结合的改进人脸识别方法。该方法采用主成分分析(PCA)对图像的主特征向量进行抽象,以获得最佳特征描述,从而减少神经网络的输入次数。然后将这些降维后的图像数据输入到前馈神经网络中进行训练。采用粒子群算法对神经网络的权值进行优化。然后使用标准人脸数据库中的样本对训练好的网络进行测试。结果表明,与其他方法相比,该方法具有较高的识别率。
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引用次数: 24
Numerical Simulation Technique for Nonlinear Singularly Perturbed Predator-Prey Reaction Diffusion System in Biomathematics 非线性奇摄动捕食-猎物反应扩散系统的生物数学数值模拟技术
Pub Date : 2007-08-24 DOI: 10.1109/ICNC.2007.507
X. Cai, Zhongdi Cen
In biomathematics, singularly perturbed predator-prey systems are of common occurrence. A singularly perturbed problem with nonlinear predator-prey reaction diffusion system in 2 dimension is studied. The system changes rapidly near initial time layer. Traditional numerical method failed to simulate the system. Numerical simulation of this kind of system is rare so far, this motives us to consider novel simulation technique. Firstly stretched variable is introduced so that the analytic solution is decomposed into the reduced solution and the initial layer correction solution. Secondly, the nonlinearization process of the reduced problem system is proposed. Thirdly, two numerical method, stretched variable method and Shishkin- type method, are constructed. Finally, simulation example is studied to demonstrate that both stretched variable method and Shishkin-type method are efficient computational method. Shishkin-type method is more practical in use for this kind of complicated system.
在生物数学中,奇异摄动捕食者-猎物系统是很常见的。研究了一类二维非线性捕食者-猎物反应扩散系统的奇摄动问题。系统在初始时间层附近变化很快。传统的数值方法无法对系统进行模拟。这类系统的数值模拟目前还很少见,这促使我们考虑新的模拟技术。首先引入拉伸变量,将解析解分解为约简解和初始层修正解;其次,给出了约简问题系统的非线性化过程。第三,构造了两种数值方法:拉伸变量法和Shishkin型法。最后通过仿真算例验证了拉伸变量法和shishkin型法都是有效的计算方法。对于这类复杂的系统,shishkin型方法更为实用。
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引用次数: 2
The Research of Network Planning Risk Element Transmission Theory Based on Genetic Algorithm 基于遗传算法的网络规划风险要素传递理论研究
Pub Date : 2007-08-24 DOI: 10.1109/ICNC.2007.739
Cunbin Li, Kecheng Wang
Risk management project is an important aspect of general project risk element transmission theory. Traditional network planning technology encountered great obstacles in project risk management issues, and often unable to accurately forecast the risk, resulting great loss of costs. To address the cost-time optimization problem considering the risk elements, this paper established a network planning risk element model, which divides risk elements into discrete model and continuous model to be discussed separately. In the discrete model costs and risk element matrix is introduced to get the corresponding programming model; In Continuous model the idea of machine learning model is used to minimum the desired risk. Based on this model, by using genetic algorithm's efficient and rapid global search capability, this paper improves the genetic algorithm developed by Feng and others, increases the risk elements and eventually gets the cost-time curve considering risk elements. This effectively solves the network planning cost optimization problem.
项目风险管理是一般项目风险要素传递理论的一个重要方面。传统的网络规划技术在项目风险管理问题上遇到了很大的障碍,而且往往无法准确预测风险,造成很大的成本损失。为了解决考虑风险因素的成本-时间优化问题,本文建立了网络规划风险因素模型,将风险因素分为离散模型和连续模型分别进行讨论。在离散模型中引入成本和风险元素矩阵,得到相应的规划模型;在连续模型中,机器学习模型的思想被用来最小化期望的风险。在此模型的基础上,利用遗传算法高效快速的全局搜索能力,对Feng等人开发的遗传算法进行改进,增加风险元素,最终得到考虑风险元素的成本-时间曲线。这有效地解决了网络规划成本优化问题。
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引用次数: 5
期刊
Third International Conference on Natural Computation (ICNC 2007)
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