排序方式: 共有29条查询结果,搜索用时 15 毫秒
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针对片上网络中使用虚拟输出队列(VOQ)机制的路由器在网络拥塞时存在的头阻塞问题,提出负载均衡的AVOQ路由器架构。首先,输入缓冲区仍使用VOQ机制来处理头阻塞问题。其次,在路由计算模块自适应地选择输出端口,确保数据从较不拥塞的端口输出;在单个虚通道内自适应地读取数据包,确保下游不拥塞的流量能够在网络里流通。实验结果表明,相较于虚通道路由器和VOQ路由器,AVOQ路由器平均延时最多减少83.2%和57.1%,吞吐率最多增加72.7%和33.3%,功耗和面积开销可接受。该方案通过两个层级的自适应均衡全网的流量分布,缓解拥塞,进而降低头阻塞出现的可能性,并在头阻塞出现时消除其影响,提升网络性能。 相似文献
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一种"全面"的自适应机动目标跟踪算法 总被引:2,自引:0,他引:2
基于截断正态概率密度模型建立修正的截断正态概率密度模型。利用该模型并结合速度估计自适应模型提出一种“全面”自适应机动目标跟踪算法(OAF).此算法能够避免机动加速度最大值的预先设定,自适应调节目标跟踪算法中的机动频率。进一步运用神经网络方法,将机动频率与过程噪声方差进行融合,通过在线调节神经网络权值获得融合后的系统方差输出,降低现有算法因系统参数调整不当带来的精度损失。理论分析及仿真结果表明,与单纯的速度自适应模型算法相比,该算法跟踪机动目标和非机动目标时精度分别提高49. 61%和48.34%. 相似文献
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神经元自适应 PID 控制器的研究 总被引:3,自引:0,他引:3
利用神经元的自学习功能构成了自适应PID控制器;分析了神经元自适应控制系统的稳定性和学习算法的收敛性,并给出仿真结果 相似文献
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基于上下文的多值图像无失真压缩能获得较高的编码效率。图像编码应充分考虑图像的统计差异性。本文在基于上下文的多值图像无失真编码中结合自适应预测、误差信号非线性分类、误差映射、以及简化的上下文。通过试验,对比各种措施的效果,模拟结果显示,参数数量大量减少,编码效率却大大提高了。 相似文献
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Fuchun Sun Zengqi Sun Yunyue Zhu Wenjuan Lu 《Journal of Intelligent and Robotic Systems》1999,26(1):91-100
An indirect adaptive control approach is developed in this paper for robots with unknown nonlinear dynamics using neural networks (NNs). A key property of the proposed approach is that the actual joint angle values in the control law are replaced by the desired joint angles, angle velocities and accelerators, and the bound on the NN reconstruction errors is assumed to be unknown. Main theoretical results for designing such a neuro-controller are given, and the control performance of the proposed controller is verified with simulation studies. 相似文献
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Paul P. Tallon Magno Queiroz Tim Coltman Rajeev Sharma 《The Journal of Strategic Information Systems》2019,28(2):218-237
Organizations are increasingly turning to information technology (IT) to help them respond to unanticipated environmental threats and opportunities. In this paper, we introduce a systematic review of the literature on IT-enabled agility, helping to establish the boundary between what we know and what we don’t know. We base our review on a wide body of literature drawn from the AIS Basket of Eight IT journals, a cross-section of non-Basket journals, IT practitioner outlets, and premier international IS conferences. We review the use of different theoretical lenses used to investigate the relationship between IT and organizational agility and how the literature has conceptualized agility, its antecedents, and consequences. We also map the evolution of the literature through a series of stages that highlight how researchers have built on previous work. Lastly, we discuss opportunities for future research in an effort to close important gaps in our understanding. 相似文献
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针对现有多视角学习算法在构建近邻图时缺乏数据自适应性问题,提出一种自适应多视角学习(AMVL)算法。该算法首先利用L1范数具有自动数据样本选择的特性,对不同视角分别构建有向的L1图;然后根据得到的L1图,最小化各个视角下的低维重建误差;最后对不同视角间进行多视角全局坐标对齐,得到自适应多视角学习算法的目标函数。此外,还提出一种迭代优化求解方法来对所提目标函数进行优化求解。将该算法应用到图像分类问题,在Corel5K和NUS-WIDE-OBJECT两个公共图像数据集上与现有算法进行对比。实验结果表明:所提方法在这两个数据集上可以分别提高最高5%和2%的分类准确率;优化求解算法可以保证在100次迭代内收敛;算法所得到的近邻数目具有数据自适应性。 相似文献