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2021 13th International Conference on Advanced Computational Intelligence (ICACI)最新文献

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Fixed-Time Fuzzy Control for Hamiltonian Systems via Event-Triggered Approach 基于事件触发方法的哈密顿系统定时模糊控制
Pub Date : 2021-05-14 DOI: 10.1109/ICACI52617.2021.9435899
Dongqing Liu, Weiwei Sun, Shuqing Wang
This paper proposes new results on fixed-time fuzzy control for a class of Hamiltonian systems based on event-triggered scheme. A fuzzy system is utilized to approximate an unknown function in the considered Hamiltonian system. In terms of fixed-time stability criterions, a novel controller is presented to stabilize the resulting closed-loop system in fixed-time on a neighborhood of the origin. Moreover, in order to save resources, an event-triggered scheme is established to update the controller according to the trigger conditions. Taking advantage of Lyapunov stability theory, some sufficient conditions are presented to make the system states converge to the origin in a fixed time. At the same time, under the designed controller, there exists a positive lower bound between adjacent trigger times, which means that the Zeno phenomenon is avoided in the proposed event-triggered mechanism. The validity of the designed controller and event-triggered approach is also verified by a circuit system simulation example.
本文提出了一类基于事件触发格式的哈密顿系统定时模糊控制的新结果。利用模糊系统来近似所考虑的哈密顿系统中的未知函数。在定时稳定性判据方面,提出了一种新的控制器使闭环系统在原点的邻域上定时稳定。为了节省资源,建立了事件触发方案,根据触发条件更新控制器。利用李雅普诺夫稳定性理论,给出了系统状态在固定时间内收敛到原点的充分条件。同时,在所设计的控制器下,相邻触发次数之间存在正下界,这意味着所提出的事件触发机制避免了芝诺现象。通过电路系统仿真实例验证了所设计控制器和事件触发方法的有效性。
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引用次数: 0
Limit Cycle of a Single-Neuron System and Its Circuitry Design 单神经元系统的极限环及其电路设计
Pub Date : 2021-05-14 DOI: 10.1109/ICACI52617.2021.9435863
Jintao Huang, X. Liao, Nankun Mu, Yunhang Zhu
In this paper, we investigate the limit cycle of a single-neuron system and its circuit design. By transforming the system into Lienard-type and using Poincaré-Bendixson theorem as well as the symmetry of this systems, we obtain the existence conditions of limit cycle of the system. Then, by comparing the integral value of the differential of positive definite function along two assumed limit cycles, we prove that the system cannot produce two coexisting limit cycles, which means that the system has at most one limit cycle. In addition, we give the numerical simulation, and realize the circuit design of the single-neuron system by using Multisim. The waveform diagram and phase diagram of the numerical simulation and circuit simulation are obtained respectively. By comparing the results of numerical and circuit simulation, the effectiveness of our mathematical analysis and the feasibility of circuit design are better illustrated.
本文研究了单神经元系统的极限环及其电路设计。通过将该系统转化为lienard型,利用poincar - bendixson定理以及该系统的对称性,得到了该系统极限环的存在条件。然后,通过比较正定函数的微分沿两个假定极限环的积分值,证明了系统不能产生两个共存的极限环,即系统最多有一个极限环。此外,我们还进行了数值仿真,并利用Multisim软件实现了单神经元系统的电路设计。分别得到了数值仿真和电路仿真的波形图和相位图。通过数值与电路仿真结果的比较,更好地说明了数学分析的有效性和电路设计的可行性。
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引用次数: 0
Adaptive Event-triggered Control for Uncertain Nonlinear Systems based Command Filtering 基于命令滤波的不确定非线性系统自适应事件触发控制
Pub Date : 2021-05-14 DOI: 10.1109/ICACI52617.2021.9435900
Le Wang, Jing Wu, Wei Sun
This paper considers the problem of event-triggered adaptive fuzzy control for a class of uncertain nonlinear systems. An adaptive event-triggered controller is designed by using the command filter techniques and backstepping method of fuzzy logic systems (FLS). In this design, the use of command filter technique solves the problem of the explosion of complexity in traditional backstepping approach. The proposed event-triggered adaptive fuzzy controller ensures that all signals in the closed-loop systems are bounded and saves network communication resources. Finally, the effectiveness of the proposed control strategy is proved by giving the simulation results.
研究了一类不确定非线性系统的事件触发自适应模糊控制问题。利用模糊逻辑系统的命令滤波技术和反演方法,设计了一种自适应事件触发控制器。在本设计中,使用命令滤波技术解决了传统回溯算法中复杂度爆炸的问题。所提出的事件触发自适应模糊控制器保证了闭环系统中所有信号的有界性,节省了网络通信资源。最后,通过仿真结果验证了所提控制策略的有效性。
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引用次数: 0
MOEA/D based UAV swarm deployment for wireless coverage 基于MOEA/D的无人机群部署用于无线覆盖
Pub Date : 2021-05-14 DOI: 10.1109/ICACI52617.2021.9435884
Shanshan Lu, Xiao Zhang, Yu Zhou, Shilong Sun
In recent years, unmanned aerial vehicles (UAVs) have been widely used as flying-based stations to provide wireless coverage services to ground users. Owing to the UAV’s limited battery capacity and coverage range, its energy consumption or coverage have been explored by researchers. However, the existing research largely overlooks the tradeoff involved in optimizing UAV swarm deployment for wireless coverage over a ground area. This study considers homogeneous UAV deployment in a 3D space to provide sustainable wireless services as a multi-objective problem. We introduce three objectives: 1) minimize the total energy consumption while deploying a UAV to UAVs on duty, 2) minimize the number of UAVs, and 3) maximize the coverage rate of the target area. With the aim of achieving a better trade-off between these objectives, we adopt the framework of MOEA/D, which allows search progress cooperating with neighboring subproblems each other. Particularly, we introduce a single-tuple encoding scheme and genetic operators (i.e., selection, crossover, and mutation) to generate feasible optimal solutions. The simulations demonstrate that the proposed algorithm is effective and surpasses the improved SPEA II and NSGA II, which indicates that the approach is dependable in solving the proposed multi-objective optimization for UAV deployment.
近年来,无人机作为飞基站被广泛应用,为地面用户提供无线覆盖服务。由于无人机的电池容量和覆盖范围有限,研究人员对其能量消耗或覆盖范围进行了探索。然而,现有的研究在很大程度上忽略了优化无人机群部署以实现地面区域无线覆盖的权衡。本研究将同构无人机部署在三维空间中,以提供可持续的无线服务作为一个多目标问题。我们引入了三个目标:1)最小化部署无人机到值班无人机时的总能耗,2)最小化无人机数量,3)最大化目标区域的覆盖率。为了在这些目标之间实现更好的权衡,我们采用了MOEA/D框架,该框架允许搜索进度与相邻子问题相互协作。特别地,我们引入了单元组编码方案和遗传算子(即选择、交叉和突变)来生成可行的最优解。仿真结果表明,该算法是有效的,优于改进的SPEA II和NSGA II,表明该方法在解决无人机部署多目标优化问题上是可靠的。
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引用次数: 1
Speech Synthesis Method Based on Tacotron2 基于Tacotron2的语音合成方法
Pub Date : 2021-05-14 DOI: 10.1109/ICACI52617.2021.9435882
Yang Li, Donghong Qin, Jinbo Zhang
Compared with traditional speech synthesis systems, end-to-end speech synthesis systems based on deep learning (such as DeepVoice3, Tacotron2) not only reduce the requirements for linguistic knowledge, but the synthesis effect is almost close to the level of human pronunciation. However, the end-to-end speech synthesis system based on deep learning has disadvantages such as missing words, repeated pronunciation, and slow synthesis speed. In view of the local information preference of the Tacotron2 model in the decoder, this paper proposes to maximize the interactive information between the text and the predicted acoustic features and use the WaveGlow synthesizer to reduce the local information preference and the problem of slow synthesis speed, pronunciation in the Tacotron2 model. Experimental results show that the improved model subjective evaluation MOS (Mean Opinion Score) score is 3.94, and the synthesis speed is significantly improved.
与传统语音合成系统相比,基于深度学习的端到端语音合成系统(如DeepVoice3、Tacotron2)不仅降低了对语言知识的要求,而且合成效果几乎接近人类发音的水平。但是基于深度学习的端到端语音合成系统存在缺词、重复发音、合成速度慢等缺点。针对解码器中Tacotron2模型的局部信息偏好,本文提出最大化文本与预测声学特征之间的交互信息,并利用WaveGlow合成器降低Tacotron2模型的局部信息偏好以及合成速度慢、发音等问题。实验结果表明,改进后的模型主观评价MOS (Mean Opinion Score)得分为3.94分,综合速度显著提高。
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引用次数: 2
Adaptive Fuzzy 1-Bit Event-Triggered Control for Stochastic Nonlinear Systems 随机非线性系统的自适应模糊1位事件触发控制
Pub Date : 2021-05-14 DOI: 10.1109/ICACI52617.2021.9435869
Ruitong Wu, Kunting Yu, Yong-ming Li
This paper investigates the problem of adaptive fuzzy 1-bit event-triggered control for stochastic nonlinear systems. In our design, we only need to transmit a 1-bit signal (either 1 or 0), whenever the triggering signal is updated. That is, the signal is transmitted between the controller and the actuator in the communication channel. With our proposed control scheme, which can further alleviate the communication burden. Based on the Lyapunov stability analysis, all the closed-loop signals are semi-globally uniformly ultimately bounded (SGUUB). Meanwhile, Zeno behavior can be avoided.
研究随机非线性系统的自适应模糊1位事件触发控制问题。在我们的设计中,每当触发信号更新时,我们只需要传输1位信号(1或0)。即在通信信道中,在控制器与执行器之间传输信号。采用我们提出的控制方案,可以进一步减轻通信负担。基于Lyapunov稳定性分析,所有闭环信号都是半全局一致最终有界(SGUUB)。同时,芝诺行为是可以避免的。
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引用次数: 0
Channel Allocation-Based Demand Assignment Reservation Protocol for Computation Offloading in Mobile Edge Computing 移动边缘计算中基于信道分配的需求分配保留协议
Pub Date : 2021-05-14 DOI: 10.1109/ICACI52617.2021.9435866
Empilo Eynthon Guillaume Nelson, Songtao Guo
Considered as the key application of mobile edge computing (MEC), computation offloading emerges as a technology necessary to offload data for computation at an edge cloud. MEC is evolving as a promising technique susceptible to support resource constraint devices and delay sensitive applications, by delivering computing services nearby mobile users. Nevertheless, many studies have shown that latency remains one of the major challenges in MEC networks. However, in this paper, we propose to solve the latency challenge in mobile edge computing by developing the channel allocation-based demand assignment protocol for computation offloading (DAP-CO), and to tackle the server selection problem in a multi-edge server network so that to minimize the execution costs generated by mobile applications computation. The results of our simulations made in Matlab, showed that our proposed scheme can drastically decrease the energy consumption of intensive mobile application workload and speed up the execution of real time applications.
作为移动边缘计算(MEC)的关键应用,计算卸载作为在边缘云上进行计算的数据卸载所必需的技术而出现。MEC是一种很有前途的技术,通过向附近的移动用户提供计算服务,可以支持资源约束设备和延迟敏感应用。然而,许多研究表明,延迟仍然是MEC网络的主要挑战之一。然而,在本文中,我们提出通过开发基于信道分配的计算卸载需求分配协议(DAP-CO)来解决移动边缘计算中的延迟挑战,并解决多边缘服务器网络中的服务器选择问题,从而最大限度地减少移动应用计算产生的执行成本。在Matlab中进行的仿真结果表明,我们提出的方案可以大大降低密集移动应用工作负载的能耗,加快实时应用的执行速度。
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引用次数: 0
Bluetooth-Based WKNNPF and WKNNEKF Indoor Positioning Algorithm 基于蓝牙的WKNNPF和WKNNEKF室内定位算法
Pub Date : 2021-05-14 DOI: 10.1109/ICACI52617.2021.9435858
Sokliep Pheng, Ji Li, Xiaonan Luo, Y. Zhong, Zetao Jiang
Indoor Positioning System (IPS) in generally perform as a network of devices that always located the objects or people inside a building wirelessly. An IPS has direction relies nearby anchors and also can be entirely local to your smartphone. With the rapid growth and sharp increase in Indoor Positioning System (IPS) demand in the world, there are a lot of researchers trying to invent new algorithm to develop IPS. This paper proposed the Bluetooth-Base Indoor Positioning Algorithm. The RF characteristics such as RSSI and WLAN RSSI fingerprinting system normally formed by two phases, fist is offline phase and second is online phase. Fingerprinting system handling both off-line and online data and estimate the user’s location. Our algorithm design is a collection of Weighted K-Nearest Neighbors (WKNN) and Filtering algorithms by KALMAN Filter. Finally, to avoid the problems of IPS and get a better accurate we proposed two algorithms: Weighted K-Nearest Neighbors Particle Filter (WKNNPF) and Weighted K-Nearest Neighbors Extended Kalman Filter (WKNNEKF) compare to KNN and WKNN result. After comparing we found that the result of WKNNPF and WKNNEKF is better result than KNN and WKNN. The Probability in 3M of WKNN is about 79%, WKNNEKF is about 89%, and WKNNPF is about 95.1%. Among one of the proposed algorithms WKNNPF is better than WKNNEKF on accuracy 1.7-2 meters with 42.2m/s response time.
室内定位系统(IPS)通常作为一个设备网络,始终以无线方式定位建筑物内的物体或人员。IPS的方向依赖于附近的锚点,也可以完全依赖于你的智能手机。随着室内定位系统需求的快速增长和急剧增加,许多研究人员试图发明新的算法来开发室内定位系统。本文提出了基于蓝牙的室内定位算法。RSSI和WLAN等射频特征RSSI指纹识别系统通常由两个阶段组成,第一阶段是离线阶段,第二阶段是在线阶段。指纹系统处理离线和在线数据,并估计用户的位置。我们的算法设计是加权k近邻(WKNN)和卡尔曼滤波算法的集合。最后,为了避免IPS算法的问题,获得更好的精度,我们提出了加权k近邻粒子滤波(WKNNPF)和加权k近邻扩展卡尔曼滤波(WKNNEKF)两种算法,并与KNN和WKNN的结果进行了比较。经过比较,我们发现WKNNPF和WKNNEKF的结果优于KNN和WKNN。WKNN的3M概率约为79%,WKNNEKF约为89%,WKNNPF约为95.1%。其中WKNNPF算法的精度为1.7 ~ 2m,响应时间为42.2m/s,优于WKNNEKF算法。
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引用次数: 1
Distributed Network Flow to Solve Constrained Linear Matrix Equation 分布式网络流求解约束线性矩阵方程
Pub Date : 2021-05-14 DOI: 10.1109/ICACI52617.2021.9435868
Yiyuan Chai, Jiqiang Feng, Chen Xu, Sitian Qin
In this paper, a novel network flow is presented from a distributed perspective, which aims to solve classical Stein equation. With the coefficient matrices of appropriate dimensions, each agent only access to several row information. That is to say, a standard decomposition method is presented extensively, and then a distributed optimization problem to search least squares solution is proposed by introducing substitutive variables. We show the equivalence between solutions of distributed optimization problem and least squares solution of original Stein equation. Related convex analysis results show that the state solutions of the designed distributed network flow converge to the least squares solution of Stein equation. Finally, numerical results provide the viability of the designed distributed network flow.
本文从分布式的角度提出了一种新的网络流,旨在求解经典的Stein方程。使用适当维数的系数矩阵,每个代理只能访问几行信息。即广泛地提出了一种标准分解方法,然后通过引入代换变量,提出了一个寻找最小二乘解的分布式优化问题。给出了分布优化问题的解与原Stein方程的最小二乘解的等价性。相关的凸分析结果表明,所设计的分布式网络流的状态解收敛于Stein方程的最小二乘解。最后,数值结果验证了所设计的分布式网络流的可行性。
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引用次数: 1
Secrecy Capacity Maximization in Wireless Wiretap Channel: A Neurodynamic Optimization Approach 无线窃听信道保密能力最大化:一种神经动力学优化方法
Pub Date : 2021-05-14 DOI: 10.1109/ICACI52617.2021.9435916
Hongyan Yu, Bao-liang Zhang, Tong Wang, Jun Wang
This paper addresses the secure transmission problem of privacy information over a fading channel with an eavesdropper. A neural network model is proposed for solving the secrecy capacity maximization problems in real time. Unlike conventional power allocation strategies, a neurodynamic secure transmission approach is provided by the relation between KKT (Karush-Kuhn-Tucker) optimality conditions and the equilibrium point of a neural network. The transient behaviour of neural networks are showed, and the effectiveness of the neurodynamic approach is substantiated with a secrecy capacity maximization problem.
本文研究了带窃听器的衰落信道上隐私信息的安全传输问题。提出了一种实时求解保密能力最大化问题的神经网络模型。与传统的功率分配策略不同,神经动态安全传输方法是由KKT (Karush-Kuhn-Tucker)最优性条件与神经网络平衡点之间的关系提供的。研究了神经网络的瞬态行为,并通过一个保密能力最大化问题验证了神经动力学方法的有效性。
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引用次数: 0
期刊
2021 13th International Conference on Advanced Computational Intelligence (ICACI)
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