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2010 Third International Conference on Intelligent Networks and Intelligent Systems最新文献

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H-infinity Control for Networked Control Systems under Communication Constraints 通信约束下网络控制系统的h∞控制
F. Jin, Huan Zhang
This note studies the problem of stabilizing networked control systems (NCSs) over random time-delay channels. In order to reduce the negative influences of communication constraints including signal transmission delay, data packet dropout and quantization effect, a new method on the $H_infty$ controller design is presented. The proof techniques rely on Lyapunov function and linear matrix inequality (LMI) tools. The simulation results illustrate the effectiveness of the proposed method.
本文研究了随机时延信道上网络控制系统的稳定问题。为了减少信号传输延迟、数据包丢失和量化效应等通信约束的负面影响,提出了一种新的$H_infty$控制器设计方法。证明技术依赖于李雅普诺夫函数和线性矩阵不等式(LMI)工具。仿真结果表明了该方法的有效性。
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引用次数: 0
The Research on Optimal Control Method of Missiles' Flight Based on Variable Calculus 基于变量微积分的导弹飞行最优控制方法研究
Zhan Yuchun, Zhang Yongqiang
To meet the requirements of the tactical targets, in the progress of the missiles’ flight, we often give the related parameters a range to make the targets to extreme. In this paper, we use variable Calculus to learn about the variation of the deflection in missiles’ flight trajectory and the method that can make the missiles reach a certain height in the shortest time. Then with the help of the software—MATLAB, we can get the optimal solution to achieve interceptions and strikes basing on the optimal method in math. It is meaningful for the application of optimization theory in missiles’ control.
为了满足战术目标的要求,在导弹的飞行过程中,我们经常给相关参数设定一个范围,使目标达到极限。本文利用微积分变量研究了导弹飞行轨迹中偏转的变化规律,以及使导弹在最短时间内到达一定高度的方法。然后在matlab软件的帮助下,根据数学上的最优方法,得到实现拦截和打击的最优解。这对于优化理论在导弹控制中的应用具有重要意义。
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引用次数: 1
Sparse Representations of Image via Overcomplete Dictionary Learned by Adaptive Non-orthogonal Sparsifying Transform 基于自适应非正交稀疏化变换学习过完备字典的图像稀疏表示
Zunyi Tang, Zuyuan Yang, Shuxue Ding
How to learn an over complete dictionary for sparse representations of image is an important topic in machine learning, sparse coding, blind source separation, etc. The so-called K-singular value decomposition (K-SVD) method [3] is powerful for this purpose, however, it is too time-consuming to apply. Recently, an adaptive orthogonal sparsifying transform (AOST) method has been developed to learn the dictionary that is faster. However, the corresponding coefficient matrix may not be as sparse as that of K-SVD. For solving this problem, in this paper, a non-orthogonal iterative match method is proposed to learn the dictionary. By using the approach of sequentially extracting columns of the stacked image blocks, the non-orthogonal atoms of the dictionary are learned adaptively, and the resultant coefficient matrix is sparser. Experiment results show that the proposed method can yield effective dictionaries and the resulting image representation is sparser than AOST.
如何学习图像稀疏表示的过完备字典是机器学习、稀疏编码、盲源分离等领域的重要课题。所谓的k奇异值分解(K-SVD)方法[3]对于这一目的是强大的,但是,太费时的应用。近年来,人们提出了一种快速学习字典的自适应正交稀疏化变换(AOST)方法。但是,相应的系数矩阵可能没有K-SVD那么稀疏。为了解决这一问题,本文提出了一种非正交迭代匹配的字典学习方法。采用顺序提取堆叠图像块列的方法,自适应学习字典的非正交原子,得到的系数矩阵更稀疏。实验结果表明,该方法可以生成有效的字典,并且生成的图像表示比ast更稀疏。
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引用次数: 2
Research on Image Compression Algorithm Based on SPHIT 基于SPHIT的图像压缩算法研究
Wei Liu
An image compression algorithm of higher compression ratio based on SPHIT is proposed and simulated, with studying on the SPHIT algorithm and image compression algorithm. Firstly, the image data is divided into high frequency wavelet coefficients and low frequency wavelet coefficients, through the discrete wavelet transform. Secondly, the wavelet coefficients, which are processed and decomposed to several blocks, pass SPHIT coding, according to the compression ratio of image to adjust the SPHIT output coding stream. Finally, the original image is reconstructed by the SPHIT decoding algorithm and inverse wavelet transform. Simulating results show that a higher Peak Signal to Noise Ratio (PSNR) in proposed algorithm than traditional SPHIT algorithm is obtained in the same compression ratio of the image.
通过对SPHIT算法和图像压缩算法的研究,提出并仿真了一种基于SPHIT的更高压缩比的图像压缩算法。首先,通过离散小波变换将图像数据分为高频小波系数和低频小波系数;其次,将小波系数处理分解成若干块,通过SPHIT编码,根据图像的压缩比调整SPHIT输出编码流。最后,利用SPHIT解码算法和小波反变换对原始图像进行重构。仿真结果表明,在相同的压缩比下,该算法比传统的SPHIT算法获得了更高的峰值信噪比。
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引用次数: 11
A Web-Based Fault Diagnosis of Analogue Circuits System 基于web的模拟电路系统故障诊断
Feng Wu, Kang Yang
with the coming of the network era and the continuous improvement of information requirement, the fault diagnosis of devices is advancing from traditional mono device and field mode to distributed and remote mode, which can largely improve the ability of device maintenance. Several NI technologies are used in this paper to realize virtual instrument remote application and computer support collaborative work environment for device remote fault diagnosis. A simulated experiment on Fault Diagnosis of Analogue Circuits system is performed and the feasibility of the scheme is proved.
随着网络时代的到来和人们对信息需求的不断提高,设备的故障诊断正从传统的单设备、现场模式向分布式、远程模式发展,极大地提高了设备维护的能力。本文利用多种NI技术实现了虚拟仪器远程应用和计算机支持的协同工作环境,实现了设备远程故障诊断。通过模拟电路系统故障诊断的仿真实验,验证了该方案的可行性。
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引用次数: 0
Design and Implementation of the Remote Monitor Server Based on Video Image 基于视频图像的远程监控服务器的设计与实现
Xiaoping Zong, Yan Zhang
The problems of large numbers of image data and concurrent client connection requests to the remote video server in C / S mode was resolved by using IOCP (I/O Completion Port) mechanism in image characteristic transmission. The multiple concurrent threads are managed and controlled by IOCP mechanism which makes the system achieve an efficient network performance. The image processing and transmission design and implementation process of the remote monitor server based on windows platform are given.
采用IOCP (I/O Completion Port)机制进行图像特征传输,解决了C / S模式下图像数据量大、客户端与远程视频服务器并发连接的问题。通过IOCP机制对多个并发线程进行管理和控制,使系统实现了高效的网络性能。给出了基于windows平台的远程监控服务器的图像处理与传输设计与实现过程。
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引用次数: 0
A Virtual Channel Calculation Algorithm for Application Specific On-chip Networks 一种应用于片上网络的虚拟信道计算算法
Li-Wei Wang
A virtual channel (VC) calculation algorithm for wormhole-switched on-chip networks is proposed. Traditionally, the virtual channels were allocated uniformly, which results in a waste of area and power. To remedy this situation, based on the queuing theory, we propose a router analytical model. Using this model, the proposed algorithm calculates the bandwidth usage at each router in the network according to the traffic characteristics of the target application, and adds VC only to the channels with the highest bandwidth usage. The simulation results show that the VC allocation result is more reasonable and higher total transmission rate can be achieved compared to the uniform VC allocation. For hotspot traffic, about 33.3% savings in buffering resources can be achieved using our algorithm, in the case of achieving similar performance levels.
提出了一种基于虫洞交换的片上网络虚拟信道(VC)计算算法。传统的虚拟信道是均匀分配的,造成了面积和功率的浪费。为了纠正这种情况,基于排队论,我们提出了一个路由分析模型。利用该模型,该算法根据目标应用的流量特征计算网络中各路由器的带宽使用情况,并仅对带宽使用最高的信道添加VC。仿真结果表明,与均匀VC分配相比,VC分配结果更加合理,总传输速率更高。对于热点流量,在达到类似性能水平的情况下,使用我们的算法可以节省约33.3%的缓冲资源。
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引用次数: 1
Research of Command Automation System Survivability Assessment Model 指挥自动化系统生存能力评估模型研究
Rulin Hu, X. He, Shaomin Yang
Based on the structural complexity of command automation system, starting from command automation system itself and the relationship between system and its environment, survivability analysis of command automation system is divided into three sub-problems of system services, external environment and model construction to be analyzed respectively. Therefore, it simplifies the complexity of the problem. Based on the uncertainty of survivability assessment information of command automation system, Bayesian network is introduced into model construction. This paper demonstrates the model construction process of command automation system survivability assessment by an example. This method has a good operability. It can not only quantitatively calculate the survivability probability of command automation system, but can also identify the major environmental factors affecting the system and the weak links of the system by diagnostic reasoning.
基于指挥自动化系统结构的复杂性,从指挥自动化系统本身以及系统与环境的关系出发,将指挥自动化系统的生存性分析分为系统服务、外部环境和模型构建三个子问题分别进行分析。因此,它简化了问题的复杂性。针对指挥自动化系统生存能力评估信息的不确定性,将贝叶斯网络引入到模型构建中。通过实例说明了指挥自动化系统生存能力评估模型的构建过程。该方法具有良好的可操作性。它不仅可以定量计算指挥自动化系统的生存概率,还可以通过诊断推理识别影响系统的主要环境因素和系统的薄弱环节。
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引用次数: 0
Two-Direction MEMS Impact Acceleration Switch 双向MEMS冲击加速度开关
Shuangjie Liu, Y. Hao, Han Xie
This article summarizes research on a novel, two-direction impact acceleration switch. To sense the change of two direction impact acceleration, A MEMS impact acceleration switch with two sensitive directions was designed. In this design, four serpentine springs were used to fix and suspend the movable electrode (sensing mass). The motion of the sensing mass was investigated by theoretical analysis and finite element analysis (FEA). To investigate whether the serpentine springs’ intensity was enough, the switch of the 1500g threshold acceleration in y direction and the 800g threshold acceleration in x direction was designed, simulated with Covent or Ware respectively. The simulation showed that the threshold accelerations basically fulfill the expectancy. To ensure the unintentional vibration inputs would not drive the sensor mass to the fixed electrode, the mode of the switch was analyzed and its natural frequency and the corresponding mode shapes were obtained from the calculation.
本文综述了一种新型双向冲击加速度开关的研究进展。为了感知两个方向的冲击加速度变化,设计了一种具有两个敏感方向的MEMS冲击加速度开关。在本设计中,使用四个蛇形弹簧来固定和悬浮可移动电极(传感质量)。通过理论分析和有限元分析对传感质量的运动进行了研究。为了考察蛇形弹簧的强度是否足够,设计了y方向1500g阈值加速度和x方向800g阈值加速度的切换,分别用Covent和Ware进行了仿真。仿真结果表明,阈值加速度基本满足预期。为了保证非故意振动输入不会将传感器质量驱动到固定电极上,分析了开关的模态,计算得到了开关的固有频率和相应的模态振型。
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引用次数: 3
All-Digital Altitude Simulation Test Stand Intake and Exhaust Pressure Automatic Control System 全数字海拔模拟试验台进排气压力自动控制系统
Song Zhang, Ying-qing Guo, Min–jie Hou, Long Li, Jie Guo, Zhihong Dan
The identification work of the aero-engine altitude test is influenced directly by the quality and accuracy of the pressure control of the intake and exhaust. In this paper, these aspects, including: the hardware structure, the software function, the digital PID engineering improvement method of the digital pressure regulation plat, and the GE90-70 based semi-physical simulation test bed construction are introduced in detail. Many advanced control techniques developed for intake and exhaust control system have been applied to the multi-type engine altitude simulation tests successfully, improved the simulation accuracy of the altitude and Mach number greatly, as well as the quality of the simulation.
航空发动机进排气压力控制的质量和精度直接影响着高空试验的识别工作。本文详细介绍了数字调压台的硬件结构、软件功能、数字PID工程改进方法以及基于GE90-70的半实物仿真试验台的搭建。许多先进的进气和排气控制系统控制技术已成功地应用于多型号发动机高度仿真试验,大大提高了高度和马赫数的仿真精度和仿真质量。
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2010 Third International Conference on Intelligent Networks and Intelligent Systems
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