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2016 3rd International Conference on Information Science and Control Engineering (ICISCE)最新文献

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A New Cuckoo Search and Its Application of Spread Spectrum Radar Polly Phase Code Design 一种新的布谷鸟搜索及其扩频雷达波利相位码设计的应用
Yanxia Sun
The Lévy flight was used in cuckoo search to achieve good optimization performance. Although the optimization performance of cuckoo search algorithm is good based on the Lévy flight some complicated mathematical operations should be used to realize the Lévy flight such as trigonometric function, gamma function and exponential functions, which limited the application of the cuckoo search algorithm especially there is high requirement about computation complex like in the embedded systems. The Lévy flight is replaced by a simple uniform distribution function based on the randomly chosen dimension and a local search method is applied to improve the optimization performance although the general structure of cuckoo search algorithm is not changed. The proposed cuckoo search algorithm is applied to several benchmark functions and the simulation results show the simplified cuckoo search algorithm can achieve better optimization performance than the original cuckoo search algorithm. Finally the simplified cuckoo search algorithm is applied to the spread spectrum radar Polly phase code design.
在布谷鸟搜索中使用lsamvy飞行,获得了较好的优化性能。虽然基于lsamvy飞行的布谷鸟搜索算法优化性能良好,但要实现lsamvy飞行需要用到一些复杂的数学运算,如三角函数、伽马函数和指数函数,这限制了布谷鸟搜索算法的应用,特别是嵌入式系统对计算复杂度的要求很高。在不改变布谷鸟搜索算法总体结构的基础上,采用基于随机选择维数的简单均匀分布函数代替lsamvy飞行,并采用局部搜索方法提高优化性能。将提出的布谷鸟搜索算法应用于多个基准函数,仿真结果表明,简化布谷鸟搜索算法比原始布谷鸟搜索算法能获得更好的优化性能。最后将简化布谷鸟搜索算法应用于扩频雷达波利相位码的设计。
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引用次数: 0
Combination of Conflict Evidence Based on Bayesian Approximation 基于贝叶斯近似的冲突证据组合
Xu Aiqiang, Menglei
In order to solve the problems emerged in the situation trying to combine conflict evidences using Dempster-Shafer theory, a new combination rule based on Dubois and Prade rule was raised. A method of using the new rule together with Bayesian Approximation was proposed to combine evidences from different bodies. Firstly the proposition transformation of discernment frame was discussed both in the open and closed world assumption. Secondly the effect of conflict was shown based on the Dempster-Shafer theory and Bayesian theorem. And finally the modified rule depending on the cardinal of set from different evidence bodies was proposed and was showed in the numerical example. Conclusion can be drawn from the example that the new combination rule reserves more information from the combined evidences and Bayesian Approximation reduces the number of focused elements, and using both of them is an effective and accurate method in evidence combination.
为了解决利用Dempster-Shafer理论对冲突证据进行组合时出现的问题,提出了一种基于Dubois和Prade规则的组合规则。提出了一种将新规则与贝叶斯近似相结合的方法来组合来自不同机构的证据。首先讨论了在开放世界和封闭世界假设下识别框架的命题变换。其次,基于Dempster-Shafer理论和贝叶斯定理,分析了冲突的影响。最后提出了基于不同证据体集合基数的修正规则,并通过数值算例进行了验证。实例表明,新的组合规则保留了更多的组合证据信息,贝叶斯近似减少了聚焦元素的数量,两者的结合是一种有效而准确的证据组合方法。
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引用次数: 0
A Novel Reconstruction Method of Magnetoacoustic Tomography with Magnetic Induction Based on the Amplitude of Lorentz Force 基于洛伦兹力振幅的磁声层析成像重建方法
Jin Liu, Liang Mao, Dakun Lai, Guoqiang Liu
Magnetoacoustic tomography with magnetic induction (MAT-MI) is a recently introduced method for imaging electrical impedance properties of biological tissue, which integrates classic electrical impedance tomography and ultrasonic technique. Image reconstruction is the key problem of MAT-MI. At present, there are certain problems for the image reconstruction methods which based on the divergence of Lorentz force. In this work, a novel reconstruction method based on the amplitude of Lorentz force instead of its divergence is proposed to avoid the singularity of the divergence of Lorentz force on the interface between two kinds of medium. Meanwhile, a two dimensional complex model was built, and preliminarily numerical simulations were carried out to evaluate the proposed method. With the rhetorical analysis and computational results, the proposed straightforward method for imaging electrical impedance properties would potentially be implemented more accurately for the MAT-MI system.
磁感应磁声层析成像(MAT-MI)是近年来引入的一种生物组织电阻抗特性成像方法,它将经典的电阻抗层析成像技术与超声波技术相结合。图像重建是MAT-MI的关键问题。目前,基于洛伦兹力散度的图像重建方法存在一定的问题。本文提出了一种基于洛伦兹力振幅而非其散度的重构方法,以避免两种介质界面上洛伦兹力散度的奇异性。同时,建立了二维复杂模型,并进行了初步的数值模拟,对该方法进行了评价。通过修辞分析和计算结果,提出的直观的电阻抗特性成像方法可能更准确地实现MAT-MI系统。
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引用次数: 0
Application of TEXTIO in the Simulation of FPGA Image Processing Algorithm TEXTIO在FPGA图像处理算法仿真中的应用
Shuyan Zhang, Juan Zhu, Chao Wang
In order to carry out high speed and effective digital image processing, the use of FPGA is a relatively reasonable choice due to the large amount of data in digital image. Thus we need a careful simulation test to verify the correctness of the VHDL code to achieve the corresponding algorithm. It is difficult to achieve the digital image processing algorithm simulation if we rely on the traditional input waveform method. And if we write a test file (Testbench) to generate a number of test vectors, it would be very low efficiency for the simulation test. If we put the real digital image data into a file as test input, not only can the correctness of the algorithm is verified, but also the processed data can be written into the image file. Thus the result can be viewed through image in this directly way which gives us great convenience for designing and debugging. The TEXTIO package of VHDL language provides exactly the function of interaction with the disk file. So we can use it to achieve the digital image processing algorithm simulation. This paper uses the algorithm of image banalization as an example to introduce this method.
为了进行高速有效的数字图像处理,由于数字图像中数据量大,使用FPGA是一个比较合理的选择。因此我们需要仔细的仿真测试来验证VHDL代码实现相应算法的正确性。如果依靠传统的输入波形法,很难实现数字图像处理算法的仿真。如果我们编写一个测试文件(Testbench)来生成一些测试向量,那么模拟测试的效率将非常低。如果将真实的数字图像数据作为测试输入,不仅可以验证算法的正确性,而且可以将处理后的数据写入图像文件。从而可以直观地通过图像查看结果,为设计和调试提供了极大的方便。VHDL语言的TEXTIO包提供了与磁盘文件交互的功能。因此我们可以用它来实现数字图像处理算法的仿真。本文以图像平庸化算法为例介绍了该方法。
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引用次数: 1
Comparison of Various Neural Network Language Models in Speech Recognition 各种神经网络语言模型在语音识别中的比较
Lingyun Zuo, Jian Liu, Xin Wan
In recent years, research on language modeling for speech recognition has increasingly focused on the application of neural networks. However, the performance of neural network language models strongly depends on their architectural structure. Three competing concepts have been developed: Firstly, feed forward neural networks representing an n-gram approach, Secondly, recurrent neural networks that may learn context dependencies spanning more than a fixed number of predecessor words, Thirdly, the long short-term memory (LSTM) neural networks can fully exploits the correlation on a telephone conversation corpus. In this paper, we compare count models to feed forward, recurrent, and LSTM neural network in conversational telephone speech recognition tasks. Furthermore, we put forward a language model estimation method introduced the information of history sentences. We evaluate the models in terms of perplexity and word error rate, experimentally validating the strong correlation of the two quantities, which we find to hold regardless of the underlying type of the language model. The experimental results show that the performance of LSTM neural network language model is optimal in n-best lists re-score. Compared to the first pass decoding, the relative decline in average word error rate is 4.3% when using ten candidate results to re-score in conversational telephone speech recognition tasks.
近年来,针对语音识别的语言建模研究越来越关注神经网络的应用。然而,神经网络语言模型的性能在很大程度上取决于其体系结构。三个相互竞争的概念已经发展起来:首先,前馈神经网络代表了一种n-gram方法;其次,循环神经网络可以学习超过固定数量的前馈词的上下文依赖关系;第三,长短期记忆(LSTM)神经网络可以充分利用电话会话语料库上的相关性。在本文中,我们比较了计数模型与前馈、循环和LSTM神经网络在会话电话语音识别任务中的应用。在此基础上,提出了一种引入历史句子信息的语言模型估计方法。我们根据困惑和单词错误率来评估模型,通过实验验证了这两个量的强相关性,我们发现无论语言模型的底层类型如何,这两个量都具有很强的相关性。实验结果表明,LSTM神经网络语言模型在n个最优列表重新评分时性能最优。与第一次解码相比,在会话电话语音识别任务中使用10个候选结果重新评分时,平均单词错误率的相对下降幅度为4.3%。
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引用次数: 1
IEKF-based Self-Calibration Algorithm for Triaxial Accelerometer 基于iekf的三轴加速度计自标定算法
Xin Lu, Zhong Liu
This paper proposed a self-calibration algorithm for triaxial accelerometer. By analyzing the measurement error factors, the parametric model of accelerometer output was built. According to the principle that the modulus value of gravity vector at a fixed point is constant, the nonlinear state space model of calibration parameters was derived. Further, the iterated extended kalman filter was proposed to avoid the problem of high space complexity of off-line calibration algorithm. Through numerical simulation the efficiency of the proposed iterated extended kalman filter algorithm was illustrated. Simulation results also demonstrated the superior performance of the proposed algorithm over the Least squares algorithm in the application of accelerometer calibration.
提出了一种三轴加速度计的自标定算法。通过分析测量误差因素,建立加速度计输出的参数化模型。根据重力矢量在定点处模值恒定的原理,推导了标定参数的非线性状态空间模型。进一步,针对离线标定算法空间复杂度高的问题,提出了迭代扩展卡尔曼滤波。通过数值仿真验证了迭代扩展卡尔曼滤波算法的有效性。仿真结果也证明了该算法在加速度计标定中的应用优于最小二乘算法。
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引用次数: 6
An Adaptive Hybrid Genetic Algorithm for VLSI Standard Cell Placement Problem 超大规模集成电路标准单元放置问题的自适应混合遗传算法
Xiongfeng Chen, Geng Lin, Jianli Chen, Wen-xing Zhu
This paper presents an adaptive hybrid genetic algorithm (AHGA) for VLSI standard cell placement problem which belongs to NP-hard combinatorial optimization problem. Based on the distinguishing feature of solution space of the problems with various scale and array or non-array placement style, we correspondingly use some adaptive strategies to greatly reduce the runtime. We make innovations in the adaptive strategies for constructing single crossover meme and accepting placement candidate. The experimental tests are performed on Peko suite3 and ISPD04 benchmark circuits, the results and comparisons show that these strategies are efficient.
针对超大规模集成电路标准单元布局问题,提出了一种自适应混合遗传算法(AHGA)。根据不同规模和阵列或非阵列布置方式问题的解空间特征,采用相应的自适应策略,大大缩短了运行时间。在构建单一跨界模因和接受植入候选人的自适应策略上进行了创新。在Peko suite3和ISPD04基准电路上进行了实验测试,结果和比较表明这些策略是有效的。
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引用次数: 4
Medical Image Transmission Strategy Based on Bandwidth Sensitivity and Multi-resolution 基于带宽灵敏度和多分辨率的医学图像传输策略
Xu Hongbo, Jiang Jianhua, Zeng Wenquan, He Yongjun
On the basis of traditional image transmission technology, the medical image transmission strategy based on bandwidth sensitivity and multi-resolution is proposed in mobile transmission environment. According to current network bandwidth, remaining battery power of mobile terminal equipment, screen resolution of mobile device supporting and real-time transmission requirements, the strategy selects the image replica with the optimal transmission resolution as the transfer object. Experiments show that the strategy is effective.
在传统图像传输技术的基础上,提出了移动传输环境下基于带宽灵敏度和多分辨率的医学图像传输策略。该策略根据当前网络带宽、移动终端设备电池剩余电量、移动设备支持的屏幕分辨率和实时传输要求,选择传输分辨率最优的图像副本作为传输对象。实验表明,该策略是有效的。
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引用次数: 0
An Analysis on the Influence of the Staggered Distance between PCB Rectangular Coils to the Wireless Energy Transmission Efficiency PCB矩形线圈交错间距对无线能量传输效率的影响分析
Wen-xiao Li, Bo Yin
With the development of science and technology, implantable medical electronic devices are widely used in medical field, which provide new methods to human to defeat disease. With the requirements of implantable medical equipment to volume and portability, printed circuit board (PCB) coil in wireless energy transmission system application in space and finite height field with advantages of high precision, high consistency and easy to design and manufacture, the density function is greatly improved, these characteristics make it widely used in the field of magnetic resonance wireless power transmission. This paper use contrast experiment method, doing a large number of simulation experiment to double PCB coil according to 3D electromagnetic software (HFSS software), ensure that the PCB coils of electrical parameters, only changing the coil between the staggered distance, analyzing the adjacent two-layer PCB make effect on magnetic resonance frequency. Eventually reached the following conclusions: if the two-layer coils distances "s" is fixed, with the increase of displacement distance "a", the magnetic resonance frequency "f" also constantly increase, when it increases to a certain extent, it will tend to be stable.
随着科学技术的发展,植入式医疗电子设备在医疗领域得到了广泛的应用,为人类战胜疾病提供了新的手段。随着植入式医疗设备对体积和便携性的要求,印刷电路板(PCB)线圈在无线能量传输系统中应用于空间和有限高度领域具有高精度、高一致性和易于设计制造、密度功能大大提高等优点,这些特点使其在磁共振无线能量传输领域得到广泛应用。本文采用对比实验的方法,根据三维电磁软件(HFSS软件)对双层PCB线圈做大量的仿真实验,保证PCB线圈的电气参数,只改变线圈之间的错开距离,分析相邻两层PCB对磁共振频率的影响。最终得出以下结论:若两层线圈距离“s”固定,随着位移距离“a”的增加,磁共振频率“f”也不断增加,当其增加到一定程度时,会趋于稳定。
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引用次数: 2
A CAD/CAM System for Complicated Jacquard Circular Knitting Machine 复杂提花圆编机CAD/CAM系统
Xin Ru, L. Peng, W. Shi, Weikang Zhou, Chun-Tai Shen
To meet the requirement of knitted fabric design and production using complicated jacquard circular knitting machine, an improved CAD/CAM system has been designed in this paper. The system has two subsystem, one named "pattern design subsystem" is for needle selectors control, and the other one named "action chain subsystem" is for +additional actuators control. In the pattern design subsystem, the color of a point in the image is corresponding to serial actions of several needle selections in this system. It is different with other CAD systems, in which the color of point presents the color of yarn. Through data analysis according to the designed image and set needle selector parameters, the data for needle selector control are prepared for machine running. Data compression is employed for taking use of storage space. If bad situation for knitting fabric production exists, like long floating line, related decomposition algorithms are needed. In the action chain subsystem, action control information is added as orders in a table named action chain. In this system, the form of mechanical action combination is used instead of a series of decomposed actuator actions. To ensure perfect coordination of actuator actions in one mechanical action, the advanced position of every actuator is able to set individually. Since there are flexible pattern design subsystem and easy-to-use action chain subsystem in this system, it performs well as a CAD/CAM system for complicated jacquard circular knitting machine.
为满足复杂提花圆编机针织物设计和生产的需要,设计了一种改进的CAD/CAM系统。该系统分为两个子系统,其中“图案设计子系统”用于针选择器的控制,“动作链子系统”用于+附加执行器的控制。在图案设计子系统中,图像中一个点的颜色对应于该系统中多个选针的连续动作。它不同于其他CAD系统,用点的颜色来表示纱线的颜色。根据设计的图像和设定的选针器参数,通过数据分析,为机器运行准备选针器控制数据。数据压缩是为了充分利用存储空间。如果存在对针织面料生产不利的情况,如长浮线,则需要相应的分解算法。在动作链子系统中,动作控制信息作为订单添加到名为动作链的表中。在该系统中,采用机械动作组合的形式代替了一系列分解的执行器动作。为了保证在一个机械动作中执行机构动作的完美协调,每个执行机构的高级位置都可以单独设置。由于该系统中有灵活的花型设计子系统和易于使用的动作链子系统,因此可以作为复杂提花圆编机的CAD/CAM系统。
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引用次数: 0
期刊
2016 3rd International Conference on Information Science and Control Engineering (ICISCE)
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