Visual masking and visual integration across saccadic eye movements.

Studied visual masking and visual integration across saccadic eye movements in 4 experiments. In a 5th experiment, 4 randomly chosen dots from a 3?×?5 dot matrix were presented in 1 fixation, and 4 different dots from the matrix were presented in a 2nd fixation. Ss reported the location of the missing dot. When the 1st display was presented just before the saccade (as in Exps I–III), Ss accurately specified the missing dot location when the dots were presented to the same region of the retina but not when they were presented in the same place in space. When the 1st display was presented well before the saccade (as in Exp IV), Ss performed poorly regardless of retinal or spatial overlap. Results indicate the existence of a short-lived retinotopic visual persistence but provide no support for a spatiotopic visual persistence capable of fusing the contents of successive fixations. It is concluded that transsaccadic integration depends instead on an abstract memory that accumulates position and identity information about the contents of successive fixations. Results are discussed in relation to the work by M. L. Davidson et al (see record 1974-10245-001). (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

自主式微小型移动机器人的自动避障行为研究

针对多微小型移动机器人工作环境的模型未知或不确定,以及该机器人本身 的某些限制,采用基于行为的研究方法,实现了自行设计的自主式微小型移动机器人在未知 、动态环境中的自动避障,设计了该机器人的障碍物回避行为,采用了电机神经元网络选择 机器人的自动避障动作,并用增强式学习的动作评判结果在线修改网络的权值,结合机器人 的漫步行为,采用机器人的安全漫步任务验证了该方法的有效性．     

基于多目标遗传算法的仿人机器人中枢神经运动控制器的设计

针对多自由度仿人机器人的运动控制,从神经生理学和机器人学的角度研究了基于中 枢模式生成器（CPGs）的仿人运动控制策略．提出了一种将多目标遗传算法应用于(CPGs)参 数优化的方法．首先构造用于仿人机器人运动控制的(CPGs)的结构,其参数通过遗传算法按 相应的评价函数得到优化．     

一种基于投票法融合的ASTER遥感影像水体提取方法

遥感影像在水资源调查和洪涝灾害监测中发挥着重要作用,但从遥感影像中提取水体通常面临着阴影和狭小水体漏提等难题。针对单一方法在水体提取中的局限性,引入分类器集成的思想,提出一种基于投票法融合的水体提取方法,首先利用Bagging、Random Forests和神经网络(NN)分类器对遥感影像进行分类,然后采用多数投票法从决策层融合3个分类结果,得到研究区水体提取结果。试验结果表明,该方法能够有效去除阴影且能较好地识别狭小水体,具有良好的应用效果。     

45钢等离子体浸没式离子注入层的组织与性能

采用等离子体浸没式离子注入对45钢进行氮离子注入。对注入表层的成分、组织和性能进行了分析。研究结果表明:注入层的剖面氮浓度分布呈高斯分布特征,注入层中有大量氮化物相形成,注入层的显微硬度和摩擦性能有明显改善。     

PIII方法制备的TiN膜的性能

用一种新型的等离子体浸没式离子注入技术(PIII),在Cr12MoV钢基体上制备了TiN膜,经XPS分析发现,膜中的组织为TiN、TiO2和Ti2O3。对有与无TiN膜的Cr12MoV钢试样进行对比,测定了维氏硬度,耐磨性以及磨痕。结果表明:TiN膜具有高的硬度和优良的抗摩擦性能。     

Multi-agent reinforcement learning with cooperation based on eligibility traces

The application of reinforcement learning is widely used by multi-agent systems in recent years. An agent uses a multi-agent system to cooperate with other agents to accomplish the given task, and one agent‘s behavior usually affects the others‘ behaviors. In traditional reinforcement learning, one agent takes the others location, so it is difficult to consider the others‘ behavior, which decreases the learning efficiency. This paper proposes multi-agent reinforcement learning with cooperation based on eligibility traces, i.e. one agent estimates the other agent‘s behavior with the other agent‘s eligibility traces. The results of this simulation prove the validity of the proposed learning method.     

低温烧结工艺对Bi-CVG铁氧体微结构及磁性能的影响

以氧化物Y2O3、Fe2O3、Bi2O3、V2O5、CaCO3为原料,采用固相反应法制备了Y1.05Bi0.75Ca1.2Fe4.4V0.6O12(Bi-CVG)铁氧体材料。通过XRD、SEM和MATS等方法考察了不同烧结温度、保温时间对产物体积密度、晶体结构、形貌和磁性能的影响。结果表明,选择适当的保温时间可以有效提高铁氧体的密度;烧结温度对相稳定性和磁性能影响显著。当烧结条件为1100℃与6h时,所制备的Bi-CVG样品属于体心立方晶系,且粒度大小分布比较均匀,结构致密。该样品磁性能良好,平均晶粒尺寸约为2μm,密度为5.20g/cm3;主要磁特性为剩磁Br=24.57mT,矫顽力Hc=764.4A/m,饱和磁化强度4πMs=343.2×10-4T。     

低温熔融盐电镀铝的研究

低温熔融盐电镀我国发展较晚,在低碳钢上开展得更迟.为此,采用熔融盐电镀法对Q235钢在AlCl3-NaCl-KCl熔融盐中电镀铝的可能性以及电镀工艺对电镀铝层组织形态的影响进行了研究.结果表明,Q235钢在熔融盐中可以进行电镀铝.经X射线衍射分析表明,镀层的相结构为单相铝.镀层的厚度随电流密度的增大和电镀时间的延长而增加,与电镀时间的平方根成线性关系.镀铝层由许多分布均匀的铝颗粒组成,电流密度低时,铝颗粒呈片状;电流密度高时,铝颗粒呈球状.同时,对电镀铝层的形成机理也进行了初步探讨.     

地震勘探中断层解释与断点组合方法的讨论

分析了当前地震勘探断层解释中存在的问题,指出断层解释中必须将定量因素的量值标注清楚、准确,同时要参考指导因素,对断层进行合理解释和断点平面上的合理组合。总结了地震勘探断层解释的基本原则,并对断层解释提出了几点建议。