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Adaptive Identification Method for Vehicle Driving Model Capable of Driving with Large Acceleration Changes and Steering 具有大加速度变化和转向能力的车辆驾驶模型的自适应识别方法
IF 0.7 Q4 COMPUTER SCIENCE, ARTIFICIAL INTELLIGENCE Pub Date : 2023-07-20 DOI: 10.20965/jaciii.2023.p0609
Soichiro Matsumoto, M. Saito
In the future, considering the expansion of the autonomous driving society, autonomous driving systems that can drive safely and quickly will be required for the purpose of saving lives and transporting goods even on rough road such as snowy, icy, and unpaved roads. In such unknown environments, technologies that combine model-based control and artificial intelligence (AI) are attracting attention for the purpose of ensuring operational stability and reliability. The second author has proposed a vehicle driving model that is robust to road geometry and ever-changing environmental disturbances. This model is based on a two-wheel model, and expresses the error in the position of the center of gravity of the vehicle by the front wheel steering angle deviation, and adaptively estimates this deviation. However, this model has large modeling errors when driving at high velocity on slippery roads. In this study, we extend this model proposed in previous study, and propose a new vehicle driving model that can handle situations such as driving with large acceleration changes and steering on bad roads such as snowy and wet roads. Then, we demonstrate the usefulness of the proposed method in a simulation using vehicle motion analysis software.
未来,考虑到自动驾驶社会的扩大,即使在下雪、结冰、未铺设的道路等崎岖不平的道路上,也需要能够安全、快速行驶的自动驾驶系统。在这种未知环境下,为了确保运行的稳定性和可靠性,将基于模型的控制与人工智能(AI)相结合的技术备受关注。第二作者提出了一种对道路几何形状和不断变化的环境干扰具有鲁棒性的车辆驾驶模型。该模型基于两轮模型,通过前轮转向角偏差来表示车辆重心位置的误差,并自适应估计该偏差。然而,该模型在湿滑路面高速行驶时存在较大的建模误差。在本研究中,我们扩展了之前研究中提出的模型,提出了一种新的车辆驾驶模型,该模型可以处理在雪湿路面等恶劣道路上加速变化较大的驾驶和转向等情况。然后,我们在车辆运动分析软件的仿真中验证了所提出方法的有效性。
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引用次数: 0
Eccentric Connectivity Index of Nanosheets and Nanotube of SiO2 二氧化硅纳米片和纳米管的偏心连通性指数
IF 0.7 Q4 COMPUTER SCIENCE, ARTIFICIAL INTELLIGENCE Pub Date : 2023-07-20 DOI: 10.20965/jaciii.2023.p0649
A. B. Greeni, S. Jancy
Chemical graph theory is a field related to Chemistry which is used to predict the behavior of chemical structures. The current trend in Chemical graph theory is evaluating topological indices. They are the numerical descriptors of the molecular structures derived from their corresponding molecular graph. These indices are studied and used in drugs, pharmaceutical research, and other fields. In this paper, the eccentric connectivity index is computed for nanosheets and nanotubes of SiO2.
化学图论是与化学相关的一个领域,用于预测化学结构的行为。目前化学图论的发展趋势是评价拓扑指数。它们是由相应的分子图导出的分子结构的数值描述符。这些指标被研究并应用于药物、药物研究和其他领域。本文计算了SiO2纳米片和纳米管的偏心连通性指数。
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引用次数: 0
Embedding Complete Bipartite Graphs into Wheel Related Graphs 将完全二部图嵌入车轮相关图
IF 0.7 Q4 COMPUTER SCIENCE, ARTIFICIAL INTELLIGENCE Pub Date : 2023-07-20 DOI: 10.20965/jaciii.2023.p0645
A. B. Greeni, P. L. Joshwa
This study considers the exact wirelength of embedding complete bipartite graphs into wheel related graphs such as wheel graphs, gear graphs, and helm graphs.
本研究考虑将完全二部图嵌入车轮相关图(如车轮图、齿轮图和舵图)的确切长度。
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引用次数: 1
A Sufficient Condition on Polynomial Inequalities and its Application to Interval Time-Varying Delay Systems 多项式不等式的一个充分条件及其在区间时变时滞系统中的应用
IF 0.7 Q4 COMPUTER SCIENCE, ARTIFICIAL INTELLIGENCE Pub Date : 2023-07-20 DOI: 10.20965/jaciii.2023.p0683
Meng Liu, Yong He, Lin Jiang
This article examines the stability problem of systems with interval time-varying delays. In the derivation of Lyapunov–Krasovskii functional (LKF), non-convex higher-degree polynomials may arise with respect to interval time-varying delays, making it difficult to determine the negative definiteness of LKF’s derivative. This study was conducted to obtain stability conditions that can be described as linear matrix inequalities (LMIs). By considering the idea of matrix transition and introducing the delay-dependent augmented vector, a novel higher-degree polynomial inequality is proposed under the condition that the lower bound of the polynomial function variable is non-zero, which encompasses the existing lemmas as its special cases. Then, benefiting from this inequality, a stability criterion is derived in terms of LMIs. Finally, several typical examples are presented to verify the availability and strength of the stability condition.
本文研究了区间时变时滞系统的稳定性问题。在Lyapunov-Krasovskii泛函(LKF)的求导中,可能会出现关于区间时变时滞的非凸高次多项式,这使得很难确定LKF导数的负确定性。本研究的目的是获得可描述为线性矩阵不等式(lmi)的稳定性条件。通过考虑矩阵转移的思想,引入与时滞相关的增广向量,在多项式函数变量下界不为零的条件下,提出了一个新的高次多项式不等式,该不等式包含了已有引理作为其特例。然后,利用这个不等式,导出了lmi的稳定性判据。最后,通过几个典型算例验证了该稳定条件的有效性和强度。
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引用次数: 0
Local Metric Dimension of Certain Classes of Circulant Networks 一类循环网络的局部度量维数
IF 0.7 Q4 COMPUTER SCIENCE, ARTIFICIAL INTELLIGENCE Pub Date : 2023-07-20 DOI: 10.20965/jaciii.2023.p0554
J. Cynthia, M. Ramya, S. Prabhu
Let G(V,E) be a graph with a set of vertices V and a set of edges E. Then, a minimum subset Wl of V is said to be a local metric basis of G if for any two adjacent vertices u,v∈V∖Wl there exists a vertex w∈Wl such that d(u,w) ≠ d(v,w). The cardinality of a local metric basis is referred to as the local metric dimension of the graph G denoted by βl(G). In this paper, we investigate the local metric dimensions of certain circulant-related architectures such as Harary graphs Hk,n with even k or n, Toeplitz networks, and ILLIAC networks.
设G(V,E)是一个具有一组顶点V和一组边E的图,那么,如果对于任意两个相邻的顶点u, V∈V∈Wl存在一个顶点w∈Wl使得d(u,w)≠d(V, w),则称V的最小子集Wl是G的一个局部度量基。局部度量基的基数被称为图G的局部度量维,用βl(G)表示。在本文中,我们研究了某些循环相关体系结构的局部度量维数,如Harary图Hk,n与偶k或n, Toeplitz网络和ILLIAC网络。
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引用次数: 0
Application of Convolutional Neural Network to Gripping Comfort Evaluation Using Gripping Posture Image 卷积神经网络在夹持姿态图像夹持舒适性评价中的应用
IF 0.7 Q4 COMPUTER SCIENCE, ARTIFICIAL INTELLIGENCE Pub Date : 2023-07-20 DOI: 10.20965/jaciii.2023.p0655
Kazuki Hokari, Makoto Ikarashi, J. A. Pramudita, Kazuya Okada, Masato Ito, Yuji Tanabe
Gripping comfort evaluation was crucial for designing a product with good gripping comfort. In this study, a novel evaluation method using gripping posture image was constructed based on convolutional neural network (CNN). Human subject experiment was conducted to acquire gripping comfort scores and gripping posture images while gripping seven objects with simple shape and eleven manufactured products. The scores and the images were used as training set and validation set for CNN. Classification problem was employed to classify gripping posture images as comfort or discomfort. As a result, accuracies were 91.4% for simple shape objects and 76.2% for manufactured products. Regression problem was utilized to predict gripping comfort scores from gripping posture images while gripping cylindrical object. Gripping posture images of radial and dorsal sides in direction of hand were used to investigate effect of direction of hand on prediction accuracy. Consequently, mean absolute errors (MAE) of gripping comfort scores were 0.132 for radial side and 0.157 for dorsal side in direction of hand. In both problems, the results indicated that these evaluation methods were useful to evaluate gripping comfort. The evaluation methods help designers to evaluate products and enhance gripping comfort.
抓握舒适性评价是设计抓握舒适性好的产品的关键。在本研究中,基于卷积神经网络(CNN)构建了一种新的基于抓握姿势图像的评估方法。通过人体被试实验,获得7种形状简单的物体和11种制成品的抓握舒适度评分和抓握姿势图像。将得分和图像作为CNN的训练集和验证集。采用分类问题对抓握姿势图像进行舒适和不舒适的分类。结果,简单形状物体的精度为91.4%,制成品的精度为76.2%。利用回归问题预测抓取圆柱形物体时抓取姿态图像的抓取舒适度得分。采用手方向的桡侧和背侧抓握姿态图像,研究手方向对预测精度的影响。结果表明,手握舒适性评分的平均绝对误差(MAE)为0.132(桡侧)和0.157(背侧)。在这两个问题中,结果表明这些评价方法对评价抓握舒适性是有用的。该评价方法有助于设计者对产品进行评价,增强抓握舒适性。
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引用次数: 0
Joint Path and Multi-Hop Communication Node Location Planning in Cluttered Environment 混沌环境下联合路径与多跳通信节点位置规划
IF 0.7 Q4 COMPUTER SCIENCE, ARTIFICIAL INTELLIGENCE Pub Date : 2023-07-20 DOI: 10.20965/jaciii.2023.p0664
Lihua Li, Zhihong Peng, Chengxin Wen, Peiqiao Shang, Jinqiang Cui
In the communication-constrained operating environment, a unmanned aerial vehicle (UAV) needs to plan a feasible path from the starting point to the endpoint while planning the node deployment location for multi-hop communication to establish an information pathway. In this study, a new algorithm was designed for joint path and multi-hop communication node location planning in cluttered environments based on rapidly-exploring random trees star (RRT*) algorithm. The maximum communication distance constraint between nodes was obtained based on the signal-free propagation model, whereas the communication node loss and path loss were established as joint optimization objectives. In bidirectional random tree growth, the structure of the trees was optimized according to the value of the loss function, and optimal path and node location planning were finally achieved through continuous growth and iteration. When tested in different complexity-barrier environments and compared to RRT*, Informed-RRT*, and IB-RRT* algorithms, the paths in the planning results of the new algorithm are close to those of the comparison algorithms; however, the number of nodes decreases significantly, which proves the effectiveness of the newly proposed algorithm.
在通信受限的作战环境下,无人机在规划多跳通信节点部署位置的同时,需要规划从起点到终点的可行路径,建立信息通路。本文设计了一种基于快速探索随机树星(RRT*)算法的混沌环境下联合路径和多跳通信节点位置规划新算法。基于无信号传播模型获得节点间最大通信距离约束,建立通信节点损耗和路径损耗作为联合优化目标。在双向随机树生长中,根据损失函数的值对树的结构进行优化,通过不断的生长和迭代,最终实现最优路径和节点位置规划。在不同复杂性障碍环境下进行测试,并与RRT*、Informed-RRT*、IB-RRT*算法进行比较,新算法规划结果中的路径与比较算法的路径接近;然而,节点数量明显减少,证明了新算法的有效性。
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引用次数: 0
Rehabilitation Evaluation System for Lower-Limb Rehabilitation Robot 下肢康复机器人康复评估系统
IF 0.7 Q4 COMPUTER SCIENCE, ARTIFICIAL INTELLIGENCE Pub Date : 2023-07-20 DOI: 10.20965/jaciii.2023.p0691
Li Jiang, Juan Zhao, Feng Wang, Yujian Zhou, Wangyang Ge, Jinhua She
Rehabilitation evaluation is an important part of rehabilitation training. It is closely related to the robot-assisted training effect. Different rehabilitation robots need different methods to evaluate patients. Rehabilitation training is a long process, and the patient’s performance scores will continue to change. A lower-limb rehabilitation robot needs a dynamic performance score to evaluate rehabilitation’s effects. This study used an analytic hierarchy process and fuzzy comprehensive evaluation methods to establish a rehabilitation evaluation system for lower-limb rehabilitation robots. A multi-scale personalized rehabilitation plan is conceived, based on the evaluation system and the combination of objective factors. This method dynamically adjusts the plan according to the rehabilitation situation of patients, which is beneficial to the improvement of the efficiency and initiative of training.
康复评估是康复训练的重要组成部分。这与机器人辅助训练的效果密切相关。不同的康复机器人需要不同的方法来评估患者。康复训练是一个长期的过程,患者的表现分数会不断变化。下肢康复机器人需要动态性能评分来评价其康复效果。本研究采用层次分析法和模糊综合评价法,建立了下肢康复机器人的康复评价体系。在评价体系的基础上,结合客观因素,构思了多尺度的个性化康复方案。该方法根据患者的康复情况动态调整计划,有利于提高训练的效率和主动性。
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引用次数: 0
Offline Handwritten Chinese Character Using Convolutional Neural Network: State-of-the-Art Methods 使用卷积神经网络的离线手写汉字:最新的方法
IF 0.7 Q4 COMPUTER SCIENCE, ARTIFICIAL INTELLIGENCE Pub Date : 2023-07-20 DOI: 10.20965/jaciii.2023.p0567
Yingna Zhong, Kauthar Mohd Daud, Ain Najiha Binti Mohamad Nor, R. Ikuesan, Kohbalan Moorthy
Given the presence of handwritten documents in human transactions, including email sorting, bank checks, and automating procedures, handwritten characters recognition (HCR) of documents has been invaluable to society. Handwritten Chinese characters (HCC) can be divided into offline and online categories. Online HCC recognition (HCCR) involves the trajectory movement of the pen tip for expressing linguistic content. In contrast, offline HCCR involves analyzing and categorizing the sample binary or grayscale images of characters. As recognition technology develops, academics’ interest in Chinese character recognition has continuously increased, as it significantly affects social and economic development. Recent development in this area is promising. However, the recognition accuracy of offline HCCR is still a sophisticated challenge owing to their complexity and variety of writing styles. With the advancement of deep learning, convolutional neural network (CNN)-based algorithms have demonstrated distinct benefits in offline HCCR and have achieved outstanding results. In this review, we aim to show the different HCCR methods for tackling the complexity and variability of offline HCC writing styles. This paper also reviews different activation functions used in offline HCCR and provides valuable assistance to new researchers in offline Chinese handwriting recognition by providing a succinct study of various methods for recognizing offline HCC.
考虑到人类事务中存在手写文档,包括电子邮件分类、银行支票和自动化过程,文档的手写字符识别(HCR)对社会来说是无价的。手写汉字(HCC)可以分为离线和在线两类。在线HCC识别(HCCR)涉及笔尖的轨迹运动来表达语言内容。相比之下,离线HCCR涉及对字符的二值或灰度图像样本进行分析和分类。随着识别技术的发展,学者对汉字识别的兴趣不断增加,因为它对社会和经济发展具有重要影响。这个领域最近的发展很有希望。然而,由于离线HCCR的复杂性和写作风格的多样性,其识别精度仍然是一个复杂的挑战。随着深度学习的进步,基于卷积神经网络(CNN)的算法在离线HCCR中表现出明显的优势,并取得了出色的效果。在这篇综述中,我们的目的是展示不同的HCCR方法来解决离线HCC写作风格的复杂性和可变性。本文还综述了离线HCCR中使用的不同激活函数,并通过对各种离线HCC识别方法的简要研究,为离线中文手写识别的新研究者提供了有价值的帮助。
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引用次数: 0
Exploring Model Structures to Reduce Data Requirements for Neural ODE Learning in Control Systems 探索模型结构以减少控制系统中神经ODE学习的数据需求
IF 0.7 Q4 COMPUTER SCIENCE, ARTIFICIAL INTELLIGENCE Pub Date : 2023-07-20 DOI: 10.20965/jaciii.2023.p0537
Takanori Hashimoto, N. Matsui, N. Kamiura, T. Isokawa
In this study, we investigate model structures for neural ODEs to improve the data efficiency in learning the dynamics of control systems. We introduce two model structures and compare them with a typical baseline structure. The first structure considers the relationship between the coordinates and velocities of the control system, while the second structure adds linearity with respect to the control term to the first structure. Both of these structures can be easily implemented without requiring additional computation. In numerical experiments, we evaluate these structure on simulated simple pendulum and CartPole systems and show that incorporating these characteristics into the model structure leads to accurate learning with a smaller amount of training data compared to the baseline structure.
在本研究中,我们研究了神经ode的模型结构,以提高控制系统动力学学习的数据效率。介绍了两种模型结构,并与典型的基线结构进行了比较。第一个结构考虑控制系统的坐标和速度之间的关系,而第二个结构在第一个结构上增加了关于控制项的线性度。这两种结构都可以很容易地实现,而不需要额外的计算。在数值实验中,我们在模拟单摆和CartPole系统上对这些结构进行了评估,结果表明,与基线结构相比,将这些特征纳入模型结构可以使用更少的训练数据进行准确的学习。
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引用次数: 0
期刊
Journal of Advanced Computational Intelligence and Intelligent Informatics
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