Results 31 to 40 of about 2,703 (160)
目的 本国际临床指南由欧洲残疾儿童学会(the European Academy of Childhood Disability,EACD)牵头制定,旨在解决发育性协调障碍(developmental coordination disorder,DCD)的定义、诊断、评估、干预以及与社会心理方面的临床应用关键问题。 方法 本指南针对五个领域的关键问题,通过文献综述和专家团队的正式讨论达成共识。为保证指南的循证基础,以“机制”、“评估”和“干预”为检索词, 对2012年更新以来提出的最新建议以及新增的“社会心理问题”和“青少年/成人”为检索词进行检索。根据牛津大学循证医学中心证据等级 (证据水平 [level of evidence, LOE]1–4) 将结果进行分类,最终转化为指南建议。并由国际 ...
Jing Hua +6 more
wiley +1 more source
研究了基于深度强化学习算法的自主式水下航行器(AUV)深度控制问题。区别于传统的控制算法,深度强化学习方法让航行器自主学习控制律,避免人工建立精确模型和设计控制律。采用深度确定性策略梯度方法设计了actor与critic两种神经网络。actor神经网络给出控制策略,critic神经网络用于评估该策略,AUV的深度控制可以通过训练这两个神经网络实现。在OpenAI Gym平台上仿真验证了算法的有效性。
王日中, 李慧平, 崔迪, 徐德民
doaj
Research on multidimensional dynamic defense strategy for microservice based on deep reinforcement learning [PDF]
Aiming at the problem that it is hard for security defense strategies in cloud native to guarantee the quality of service under dynamic requests, a multidimensional dynamic defense strategy for microservice based on deep reinforcement learning, named ...
Dacheng ZHOU +4 more
core +1 more source
针对变电站巡检机器人在传统运动规划方法下存在的难以规划出平滑路径、不确定环境下动作不可测等问题,提出研究不确定条件下的变电站巡检机器人运动规划问题的深度强化学习方法。文中分析了深度学习中奖励值模型II、探索策略和神经网络结构对整个运动规划的影响,设计了不同结构的神经网络,并开展了相关的对比实验。结果表明,在当前任务场景下,相同的运算量神经网络结构C2比神经网络结构C1和神经网络结构C3的计算时间要短。因此,在计算资源短缺时,建议采用神经网络结构C2,更有利于对变电站巡检机器人进行精准的运动规划 ...
董诗绘, 牛彩雯, 戴琨
doaj
Deep reinforcement learning-empowered anti-jamming strategy aided by sample information entropy [PDF]
For the deep reinforcement learning (DRL)-empowered intelligent jamming, an anti-jamming strategy aided by sample information entropy was proposed. Firstly, the anti-jamming strategy network and entropy prediction network were designed based on neural ...
CHEN Qianbin +6 more
core +1 more source
Research on power allocation of integrated VLPC based on deep reinforcement learning [PDF]
A power allocation scheme for integrated visible light position and communication (VLPC) system based on deep reinforcement learning was proposed to achieve power allocation for communication positioning integration.First, the frame structure design of ...
Bing LI +7 more
core +1 more source
穿柜套管是开关柜中的关键绝缘件之一,在高湿环境下容易产生凝露导致运行过程中出现沿面放电现象,给配电网的安全运行带来了隐患。文中基于三维卷积搭建了C3D和MiCT时空网络研究平台,理论分析了紫外视频时空特征的提取方法。分别研究了学习率、批处理尺寸、网络深度对MiCT网络性能的影响,并根据研究结果优化了网络模型。结果表明:MiCT网络相较于C3D网络使用了更少的三维卷积,在减少计算参量的同时获得了更强的泛化能力,具有时空不对称特性的MiCT模块比三维卷积模块能更有效地获取紫外视频的时空特征 ...
李岩 +4 more
doaj
Research on mobile edge computing and caching in massive wireless communication network [PDF]
For the large-scale network mobile edge computing and caching technology of future 6G mobile communications, firstly, the architectures and principles of mobile edge computing and caching in large-scale wireless networks were introduced, and the ...
Chong ZHENG +3 more
core +1 more source
针对智能反射面(IRS, intelligent reflecting surface)辅助的多输入单输出(MISO, multiple input single-output)无线携能通信(SWIPT, simultaneous wireless information and power transfer)系统,考虑基站最大发射功率、IRS反射相移矩阵的单位膜约束和能量接收器的最小能量约束,以最大化信息传输速率为目标,联合优化了基站处的波束成形向量和智能反射面的反射波束成形向量。为解决非凸优化问题 ...
基于DDPG的智能反射面辅助无线携能通信系统性能优化
doaj +1 more source
Attainment Pairing Effects on Cognitive Conflict in Technology‐enhanced EFL Cooperative Tasks
ABSTRACT This study examines how attainment pairing (high‐high versus high‐low versus low‐low attainment) impacts English as a Foreign Language (EFL) learner engagement during technology‐enhanced cooperative writing tasks. Seventy‐eight Chinese university learners formed 39 dyads (13 pairs per group) via Tencent Meeting.
Ying Liu, Allen Thurston
wiley +1 more source

