Featural guidance in conjunction search: The contrast between orientation and color.

Four experiments examined the effects of precues on visual search for targets defined by a color-orientation conjunction. Experiment 1 showed that cueing the identity of targets enhanced the efficiency of search. Cueing effects were stronger with color than with orientation cues, but this advantage was additive across array size. Experiment 2 demonstrated that cueing effects interacted with bottom-up segmentation processes, whereas Experiment 3 showed the stronger effects of color cues remained in a compound task. Experiment 4 confirmed the enhanced effect of color cueing even when verbal rather than visual cues were used. The targets used were balanced for search efficiency within both orientation and color dimensions. We suggest search benefits from the top-down cueing of color compared with orientation because color cueing enhances the segmentation of displays into color groups more efficiently. This enables search to an appropriate color group to be initiated earlier. We discuss how top-down segmentation processes interact with differences in bottom-up segmentation to further improve target detection. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

基于炭黑填充导电橡胶的力敏传感器的灵敏度

以通用有效介质理论为基础, 给出了炭黑填充导电橡胶(炭黑/橡胶)的力敏传感器灵敏度计算方程。采用该方程并结合形变和压阻效应, 分析了影响力敏导电炭黑/橡胶的灵敏度的主要参数。结果表明: 炭黑体积分数是影响力敏导电炭黑/橡胶的灵敏度的主要参数。当炭黑体积分数在临界体积分数附近时, 力敏导电炭黑/橡胶的灵敏度为0.1～11.5 MPa^-1, 其敏感机制主要为压阻效应。当炭黑体积分数在渗流区时, 灵敏度为0.2～3.6 MPa^-1, 其敏感机制还与接触压力的大小有关, 压力较小时, 主要为压阻效应; 压力较大时, 主要为应变效应。若炭黑体积分数在传导区, 灵敏度为0.3～1.7 MPa^-1, 其敏感机制主要为应变效应。     

基于PVDF的欠驱动多指手滑触觉硬件系统

为解决传统果蔬采摘欠驱动多指手抓取力控制精度不高的问题,提出了一种基于聚偏二氟乙烯(PVDF)压电薄膜技术的新型欠驱动多指手滑触觉系统,该系统由信号采集和信号处理两个模块组成;分别设计了滑触觉传感器,电荷放大、低通滤波、工频限波、电压放大等电路,并进行了捏取和抓取实验.实验结果表明,该系统能较好地控制多指手的抓取精度,实现无损伤抓取,且具有广阔的应用前景.     

建筑室内装饰领域中的材料与审美心理

本文从人与装饰材料的角度及其关系出发,并从材料的分门别类研究开始,从功能、应用、机能、物理、生理及心理、触觉等多方面、多角度的分析了现时期装饰材料的应用效果与审美心理的不同与其复杂的需求关系。     

To what extent do Gestalt grouping principles influence tactile perception?

Since their formulation by the Gestalt movement more than a century ago, the principles of perceptual grouping have primarily been investigated in the visual modality and, to a lesser extent, in the auditory modality. The present review addresses the question of whether the same grouping principles also affect the perception of tactile stimuli. Although, to date, only a few studies have explicitly investigated the existence of Gestalt grouping principles in the tactile modality, we argue that many more studies have indirectly provided evidence relevant to this topic. Reviewing this body of research, we argue that similar principles to those reported previously in visual and auditory studies also govern the perceptual grouping of tactile stimuli. In particular, we highlight evidence showing that the principles of proximity, similarity, common fate, good continuation, and closure affect tactile perception in both unimodal and crossmodal settings. We also highlight that the grouping of tactile stimuli is often affected by visual and auditory information that happen to be presented simultaneously. Finally, we discuss the theoretical and applied benefits that might pertain to the further study of Gestalt principles operating in both unisensory and multisensory tactile perception. (PsycINFO Database Record (c) 2011 APA, all rights reserved)     

A mechatronic platform for human touch studies

The development of a mechatronic tactile stimulation platform for touch studies is presented. The platform was developed for stimulation of the fingertip using textured surfaces, providing repeatable tangential sliding motion of stimuli with controlled indentation force. Particular requirements were addressed to make the platform suitable for neurophysiological studies in humans with particular reference to electrophysiological measurements, but allowing a variety of other studies too, such as psychophysical, tribological and artificial touch ones. The design of the mechatronic tactile stimulator is detailed, as well as the performance in tracking reference trajectories. Using microneurography, we recorded from human tactile afferents and validated the platform compatibility with the exacting demands of electrophysiological methods, comprising the absence of spurious vibrations and the lack of relevant electromagnetic interference.     

Optical Fiber Type Slide Tactile Sensor Used for Underwater Robot

Bexause of the special underwater environment, many sensors used well in robots working in space or on the hand can not be used in the underwater.So an optical fiber type slide tactile sensor is designed by the inner modulation mechanism of the intensity type optical fiber.The principle and structure of the sensor are introduced in detail.The static and dynamic characteristics are analyzed theoretically and experimentally.The dynamic characteristic model is built and the simulation is made by using genetic algorithm based on neural network.In order to use the sensor perfectly, the recognition model of the sensor is built on the basis of the principle of “inverse solution”using neural networks.The control precision and sensitivity of the manipulator are improved.     

水下作业液压机械手软抓取技术的研究

水下机械手常要进行抓取作业,为了能把物体抓住而又不因夹持力过大而对物体造成伤害,本文设计了一种用于水下的滑觉传感器,对抓取时遇到的问题及相应的施力策略进行研究,并设计了一种模糊神经网络控制器,它具有自学习、并行分布存储信息及快速模糊推理的能力,能够满足机械手软抓取作业的要求。