4 results about "Large distance" patented technology

The disclosed architecture is a new feature extraction approach to handwriting recognition. Given an handwriting sample (e.g., from an online source), a sequence of time-ordered dominant points are extracted, which include stroke-endings, points corresponding to local extrema of curvature, and points with a large distance to the chords formed by pairs of previously identified neighboring dominant points. At each dominant point, a multi-dimensional feature vector is extracted, which includes a combination of coordinate features, delta features, and double-delta features.

The invention discloses a near field simulator. Near-field spherical wave-front simulation is realized based on compact-field de-focusing control. Through continuous adjustment of the de-focused irradiation of an excitation source on a reflection plane, equivalent spherical wave sources at different distances are simulated continuously, with the purpose of compactly realizing a near-field electromagnetic environment with large distance coverage to conduct a near-field simulation test on a radio system. The near field simulator can work in a more controllable natural environment or electromagnetic environment, and is conducive to improving the test conditions of electromagnetic simulation debugging, reducing the test cost and improving the test efficiency. The near field simulator is better than an external field largely affected by natural weather. The near field simulator can work at the position of a wider-range equivalent spherical wave source, and is conducive to dynamically and variably configuring a near-field wave-front required for test and conducting a simulation test on a more vivid and changeable near-field electromagnetic environment required. The near field simulator is better than a near field of which the transmitting and receiving distance is controlled directly.

A reflecting layer is provided for each of a white pixel PW and a plurality of chromatic color pixels PR, PG and PB. A semitransparent reflecting layer is provided for each of the white pixel PW and the plurality of chromatic color pixels PR, PG and PB. The distance between the reflecting layer and the semitransparent reflecting layer in the white pixel PW is larger than the largest distance among distances between the reflecting layer and the semitransparent reflecting layer in the chromatic color pixels PR, PG, PB. Such display device can suppress increase in manufacturing cost and obtain both merits of optical micro-cavity structure and of the white pixel.

A system is provided for wirelessly locating objects. The system has a transceiver unit with an antenna array of two partially overlapping coils, which is used in combination with a passive electromagnetic reflector to track or locate the objects. The system is tuned to reflect and receive higher order harmonics of a transmitted signal frequency. The system is reliable in a highly reflective environment with no placement error detection due to reflections. A relatively large distance can be bridged with a minimum power and a small sensitive area to detect the coils, which increase the accuracy to determine the location of the electromagnetic reflector.