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2014 11th International Computer Conference on Wavelet Actiev Media Technology and Information Processing(ICCWAMTIP)最新文献

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Application of wavelet transform in laser detection of underwater acoustic signal 小波变换在水声信号激光探测中的应用
L. Zhang, Xiao-Lin Zhang, B. Zou, W. Tang
This article analyses the characteristic of time frequency distribution of laser detection signals of underwater acoustic signal, we discover the regularity of wavelet ridges distribution of laser interference signal: some wavelet ridges distribute on the scale-time curve which is corresponding with the frequency of underwater acoustic signal, or symmetrically distribute in the upper and lower sides. According to this regularity, a method for estimating the instantaneous frequency of underwater acoustic signal using wavelet ridges is put forward. Detection experiments of underwater acoustic signal with stable-frequency and the linear frequency modulation are both carried out using wavelet transform, and the results prove the correctness of this method.
本文分析了水声信号激光探测信号时频分布的特点,发现了激光干涉信号的小波脊分布的规律:有的小波脊分布在与水声信号频率相对应的尺度-时间曲线上,有的小波脊在上下两侧对称分布。根据这一规律,提出了一种利用小波脊估计水声信号瞬时频率的方法。利用小波变换对稳定频率和线性调频的水声信号进行了检测实验,结果证明了该方法的正确性。
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引用次数: 3
Ananalytic model of military system-of-systems based on network-of-networkstheory 基于网络中的网络理论的军事系统的分析模型
Fei Wang, Guang-ya Si, Baoliang Xiao, Yafeng Shi
Network-of-Networks (NoN) is the latest developments of Complex Network, which is suitable for researching problem of System-of-Systems(SoS). We put forward a conceptual model of military SoS based on NoN, the model can describe various dynamic and static factors of SoS effectively. The SoS is mapped into physical network, relationship network and interaction network. The interaction network is defined in the form of flows, and the relationships between different networks are analyzed qualitatively. The approach of instantiating the conceptual model is introduced, the method of analyzing base on the instantiated model is shown through an example of simulation.
网络(NoN -of- networks)是复杂网络的最新发展,适用于研究系统的问题。提出了一种基于NoN的军事SoS概念模型,该模型能有效地描述SoS的各种动态和静态因素。将SoS映射为物理网络、关系网络和交互网络。以流的形式定义了交互网络,并定性分析了不同网络之间的关系。介绍了概念模型的实例化方法,并通过仿真实例说明了基于实例化模型的分析方法。
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引用次数: 0
Optimal antiviral treatment strategies for the control of pandemic influenza 控制大流行性流感的最佳抗病毒治疗策略
Qingxin Zhang
This paper discusses an optimal antiviral treatment strategy for the outbreak of influenza. The optimal control problem is formulated by minimizing the number of infected individuals at a minimal intervention cost. The existence of an optimal solution for the control problem is proved. In addition, with the Pontryagin's Maximum Principle, the time-varying optimal strategy of antiviral treatment is obtained.
本文讨论了流感爆发的最佳抗病毒治疗策略。最优控制问题是指以最小的干预成本使感染人数最小化。证明了控制问题的最优解的存在性。此外,利用庞特里亚金极大值原理,得到时变抗病毒治疗的最优策略。
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引用次数: 0
A new optimal reduced dimension weighted fusion white noise estimator 一种新的最优降维加权融合白噪声估计方法
Xiaojun Sun, G. Yan, Bo Zhang
For the multisensor linear discrete time-invariant systems with correlated noises, a reduced dimension weighted measurement fusion algorithm is presented. Furthermore, an optimal reduced dimension weighted measurement fusion white noise deconvolution estimator is given. Its computational burden is greatly reduced. A simulation example for a 3-sensor system with Bernoulli-Gaussian input white noise shows its effectiveness.
针对具有相关噪声的多传感器线性离散时不变系统,提出了一种降维加权测量融合算法。在此基础上,给出了一种最优的降维加权测量融合白噪声反褶积估计方法。它的计算负担大大减少。对输入白噪声为伯努利-高斯噪声的三传感器系统进行了仿真,验证了该方法的有效性。
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引用次数: 0
Super-resoloution image reconstruction based on wavelet packet transform and artifcial neural networks 基于小波包变换和人工神经网络的超分辨率图像重建
Pann Ei San, F. Tian, Zhiyong Shi, Minjun Deng
Super-resolution image reconstruction is an image processing technique that attempts to reconstruct high quality and high-resolution images from one or more low-resolution images by learning from a collection of training images. In this paper, new image resolution enhancement methods using wavelet packet transform and neural networks are proposed. The input image is decomposed by using wavelet packet transform. In this work, the wavelet packet decomposition sub-images are used to train neural networks. Multilayer Perceptron (MLP) and Radial Basis Function (RBF) neural networks are employed to predict the expected wavelet packet sub-images of a high-resolution image. The super-resolved image is finally produced by using the synthesis procedure of wavelet packet transform. The objective and subjective quality assessments indicate that the proposed methods outperform the conventional image resolution enhancement techniques.
超分辨率图像重建是一种图像处理技术,它试图通过学习一组训练图像,从一幅或多幅低分辨率图像中重建出高质量和高分辨率的图像。本文提出了利用小波包变换和神经网络增强图像分辨率的新方法。利用小波包变换对输入图像进行分解。在这项工作中,使用小波包分解子图像来训练神经网络。采用多层感知器(MLP)和径向基函数(RBF)神经网络对高分辨率图像的期望小波包子图像进行预测。最后利用小波包变换合成程序生成超分辨图像。客观和主观的质量评价表明,所提方法优于传统的图像分辨率增强技术。
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引用次数: 1
New tensorial morphological gradients in DTI image segmentation algorithm DTI图像分割中新的张量形态梯度算法
Tao Lin, Xiaoyun Liu, X. Zhang, Yan Ma, Z. Liu
Calculating morphological gradient is the key step of watershed algorithm. In this article, new tensorial similarity morphological gradient is defined based on the eight neighborhoods, and new tensor anisotropy morphological gradients are put forward, which are then used in the watershed segmentation framework to segment DTI image. The results of the segmentation experiments on the corpus callosum show that: Compared to other tensor anisotropy morphological gradients based watershed segmentation methods, the one based on newly proposed tensor anisotropy morphological gradients can more quickly and accurately position and depict the segmentation outline of the image, which can also better protect the edge information of the important region.
形态梯度的计算是分水岭算法的关键步骤。本文基于8个邻域定义了新的张量相似形态梯度,提出了新的张量各向异性形态梯度,并将其应用于分水岭分割框架中对DTI图像进行分割。在胼胝体上的分割实验结果表明:与其他基于张量各向异性形态梯度的分水岭分割方法相比,新提出的基于张量各向异性形态梯度的分水岭分割方法能更快速、准确地定位和描绘图像的分割轮廓,也能更好地保护重要区域的边缘信息。
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引用次数: 0
The design of high precision double buffer MEMS acceleration seismometer 高精度双缓冲MEMS加速度地震仪的设计
Ping Gan, Huan Yu, Zhuo Chen, Dong Lianli, Xiaohu Shen, Ming Yu, Yu Zhang, Cailan Zeng, Xiaosong Zhang
In this paper, a new type of high precision double buffered MEMS acceleration seismometer is introduced. The MEMS sensor technology, Σ- delta 24 bits A/D conversion technology are adopted in our method. Furthermore, FPGA extended SDRAM is utilized for the implementation. Experiments show that the detector performance compared with France's DSU3 Sercel co, frequency response reaches 0-784Hz; Power consumption is 160 mV, which can realize the large volume of 128 Mbit cache. The dynamic range and band width has been greatly improved than traditional receiver, and the ability to resist electromagnetic interference is enhanced.
介绍了一种新型高精度双缓冲微机电系统加速度地震仪。本方法采用MEMS传感器技术Σ- delta 24位A/D转换技术。此外,FPGA扩展的SDRAM被用于实现。实验表明,该探测器性能与法国的DSU3 Sercel公司相比,频率响应达到0-784Hz;功耗为160mv,可实现128mbit的大容量缓存。与传统接收机相比,该接收机的动态范围和带宽有了很大的提高,抗电磁干扰的能力得到了增强。
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引用次数: 0
Research on key technologies of unmanned aerial vehicle intelligent four shaft rotor 无人机智能四轴转子关键技术研究
Yuehao Yan, C. Li, Rong Wang
With the rapidly development of microelectronics technology, control theory, four shaft rotor unmanned aerial vehicle technology has been dramatically improved. In this paper, a fast intelligent building model and setting process have been proposed, which are based on the research of the key technology of four shaft rotor unmanned aerial vehicle, this model and setting process has been proved plausibly and correctly with experiments.
随着微电子技术、控制理论的迅速发展,四轴旋翼无人机技术得到了极大的提高。本文在研究四轴旋翼无人机关键技术的基础上,提出了一种快速智能建筑模型和设置流程,并通过实验验证了该模型和设置流程的合理性和正确性。
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引用次数: 3
A novel CKF method for target tracking 一种新的CKF目标跟踪方法
Yiou Sun, Jingwen Xie, Junhai Guo, Haifang Wang, Yang Zhao
This paper presents a new target tracking method. The presented method which named marginalized cubature Kalman filter is based on standard cubature Kalman filter and marginalized moment estimator. The marginalized moment estimator uses sigma-points sampling and Guass-Hermite integration to estimate the mean and covariance. The proposed algorithm which is called MCKF in short, uses marginalized moment estimator to calculate the state's mean and covariance in the CKF framework and gets a better accuracy and keep the covariance matrix being positive definite. Simulation indicates the presented algorithm's feasibility and improved performance.
本文提出了一种新的目标跟踪方法。提出了一种基于标准差分卡尔曼滤波和边缘矩估计的边缘差分卡尔曼滤波方法。边缘矩估计采用西格玛点采样和高斯-埃尔米特积分来估计均值和协方差。本文提出的算法简称MCKF,在CKF框架中使用边缘矩估计器计算状态均值和协方差,获得了较好的精度,并保持了协方差矩阵的正定。仿真结果表明了该算法的可行性和提高的性能。
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引用次数: 3
Cramer-rao lower bound for localization in environments with dynamical obstacles 具有动态障碍物环境下的Cramer-rao下界定位
Riming Wang, Jiu-chao Feng
Cramer-Rao Lower Bound (CRLB) of location estimation under Gaussian distribution is widely used in localization applications. However, under the environments with dynamical obstacles, the existing CRLB does not represent the effect of the non-line-of-sight (NLOS) bias caused by dynamical obstacles. In this paper, based on received signal strength (RSS) measurements, a uniform random variable is used to model the NLOS bias effect. Furthermore, The corresponding maximum likelihood estimator (MLE) and CRLB under the joint distribution of Gaussian distribution and uniform distribution are derived. Numerical results validate that the proposed MLE and CRLB are effective in environments with dynamic obstacles.
高斯分布下的位置估计的crmer - rao下界(CRLB)在定位应用中得到了广泛的应用。然而,在存在动态障碍物的环境下,现有的CRLB并不能代表动态障碍物引起的非视距偏差的影响。本文基于接收信号强度(RSS)测量,采用均匀随机变量来模拟NLOS偏置效应。在此基础上,推导了高斯分布和均匀分布联合分布下的最大似然估计量(MLE)和最大似然估计量(CRLB)。数值结果验证了所提出的最大似然估计和最小似然估计在有动态障碍物的环境下是有效的。
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引用次数: 0
期刊
2014 11th International Computer Conference on Wavelet Actiev Media Technology and Information Processing(ICCWAMTIP)
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