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  • Tactile roughness discrimination of the finger pad relies primarily on . . .
    The tactile roughness discrimination threshold was defined as the amount of change required to produce a 75% just noticeable difference (75% JND) in sensation The stimulus difference was defined as the difference in particle size between a given stimulus and the reference stimulus (P320)
  • Measuring the distribution of tactile acuity at the fingertips
    presented to the finger pad (hereinafter, the flat part of the fingertip is called the finger pad) [4, 5, 6] using pin matrices However, when manipulating objects, such as pens or tools, the utilization extends beyond the finger pad to include the sides and the hemi-spherical part at the finger's end This underscores the necessity to extend
  • Tactile roughness discrimination threshold is unrelated to tactile . . .
    Tactile spatial resolution threshold (TSRT) was measured with the Grating Orientation Task (GOT) using JVP Domes (JVP Domes, Stoelting Co , Wood Dale, IL) on the index finger of the dominant hand This test consists of a set of eleven different hemispherical plastic dome gratings having equidistant bar and groove widths: 0 35, 0 50, 0 75, 1 00
  • Tactile Resolution: Peripheral Neural Mechanisms Underlying the Human . . .
    The discrimination threshold averaged 0 55 mm for a moderately curved sphere (radius 5 80 mm) and de- In the tactile system, we are not aware of any studies that ex- to apply spherically curved surfaces to the central part of the fingerpad; the finger was positioned so that the applied force, at the point of con- tact, was normal to the
  • A comparison of tactile spatial sensitivity on the palm and fingerpad . . .
    Studies of tactile spatial pattern perception have, for the most part, been carried out using the fingerpad On the basis of these studies, models have been developed linking spatial pattern identification and resolution with underlying neural structures It has been suggested that with appropriate scaling, these models would apply to the processing of spatial patterns presented to other sites
  • Human Detection and Discrimination of Tactile Repeatability, Mechanical . . .
    has investigated finger velocities during tactile exploration Generally, tactile devices are designed with high bandwidth to overcome this problem Frisoli et al [12] and Lederman and Klatzky [13], [14] discuss the motions and methods of tactile exploration These motions and methods provide a basic estimate of the relative finger velocities
  • (PDF) Discriminating tactile speed in absence of raised texture . . .
    We evaluated the role of deformation and vibration cues in tactile speed discrimination To this end, we tested the discrimination of speed of a moving smooth glass plate, and compared the precision of the responses when the same task was performed with a plate having a fine texture the fingertip (right index finger) vibrotactile threshold
  • Force Discrimination of Finger Pads Using Improved Hand Haptic Interface
    This paper presents improvements to a developed hand haptic interface and the experimental results from a force discrimination test of finger pads The hand haptic interface combines newly developed one-dimensional (1D) force display devices for each finger pad using the 3D fingertip Haptic Interface Robot called the HIRO III equipped with a 3D hand-pose measurement system
  • Tactile roughness discrimination threshold is unrelated to tactile . . .
    Most research examining tactile texture perception has focused specifically on the highly prominent perceptual dimension of roughness The present experiments dealt chiefly with this perception More precisely, we aimed to determine the just noticeable difference (JND) threshold for roughness discrimination under moving conditions [8]
  • Investigation of vibrotactile sensation of human fingerpads by . . .
    The apparatus comprised a human fingerpad and a total-reflection prism with a smooth flat surface (arithmetic mean roughness: R a =0 02 μm) This apparatus was used for the measurement of the apparent and real contact areas of the fingerpad and the measurement of the vibrotactile sensation of the fingerpad under a controlled contact load





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