55results about How to "Performance upgrade" patented technology

An obstacle detecting apparatus includes an image input unit for receiving images inputted respectively from a plurality of image pick-up devices and accumulating the input images, a feature calculating unit for calculating predetermined, specific feature quantities in the respective accumulated images, a feature comparing unit for comparing the feature quantities, and a result judging unit for judging the presence or absence of an obstacle on the basis of the comparison result. The obstacle detecting apparatus can thus detect an obstacle present on the road by distinguishing the obstacle from a mere object causing no obstruction to driving of the vehicle.

An obstacle detecting apparatus, comprising: an image input unit for receiving images inputted respectively from a plurality of image pick-up devices and accumulating the input images; a feature calculating unit for calculating predetermined, specific feature quantities in the respective accumulated images; a feature comparing unit for comparing the feature quantities in the respective accumulated images; and a result judging unit for judging the presence or absence of an obstacle on the basis of the comparison result obtained in the feature comparing unit. The obstacle detecting apparatus can thus detect an obstacle present on the road, such as a vehicle running ahead, a parked vehicle, and a pedestrian, by distinguishing the obstacle from a mere object causing no obstruction to driving of the vehicle, such as the texture like the white line or signs on the road surface, and the guardrail along the roadside.

A fan blade system with multiple spaced layers of blades and a centrifugal fan using same are disclosed. The centrifugal fan includes a housing, in which the fan blade system is mounted. The fan blade system includes a hub, and a first and a second blade group outward extended from a circumferential wall of the hub to axially space from each other. The housing includes a main housing portion and a secondary housing portion integrally formed on one side of the main housing portion. When the fan blade system is mounted in the housing, the two blade groups are separately located in the main housing portion and the secondary housing portion to produce higher airflow pressure and more air volume. With these arrangements, the centrifugal fan can have upgraded performance and be manufactured with reduced labor, time and material costs.

The present invention provides a method for initialization and stepsize control of a time-domain equalizer (TEQ) in a receiver of a multi-carrier communication system to upgrade the performance of adaptive TEQ algorithms. As to TEQ initialization, the Time-domain Window Mask method generates a modified channel impulse response (CIR) by performing a locate maximum energy algorithm and then applies a time-domain window mask to adjust the modified CIR to obtain an initial value of a target impulse response. Then, a dividing operation is performed on the frequency-domain initial target impulse response and the modified CIR to determine an initial value of the frequency-domain TEQ impulse response. The Head-tail Equalizing method also performs the locate maximum energy algorithm, and the remaining points other than the consecutive points with maximum energy are combined and padded zero to the last few points to generate a modified CIR. The reciprocal of the frequency-domain modified CIR is determined to be an initial value of the frequency-domain TEQ impulse response. The initial value of the frequency-domain target impulse response is determined by multiplying the determined frequency-domain. TEQ impulse response with the frequency-domain of the CIR. The stepsize control method configures the stepsize coefficient as a time-varying coefficient during the whole adapting TEQ algorithm. It is smaller value at an early stage to prevent from divergence and becomes larger at a late adapting stage to prevent from slow convergence.

The invention discloses a group ocean bottom seismometer (GOBS) and a use method thereof. The group ocean bottom seismometer is an ocean bottom seismometer provided with a mooring cable type metal shell. The external structure of the group ocean bottom seismometer includes a pressure resistant cabin, an upper flange and a lower flange and a tether steel cable. A titanium alloy shell is adopted as the cabin of the group ocean bottom seismometer; an end surface O-shaped ring sealing mode is adopted to seal the cabin; a digital collector, a full-angle detector, a network communication module, a GPS, an electronic compass and a combined power source are arranged in the cabin; and a spread spectrum circuit is additionally arranged on the full-angle detector, so that a sensor can be designed. The group ocean bottom seismometer (GOBS) and the use method thereof invention are applied to high-density shallow seabed seismic observation and oil and gas exploration and the development of combined ocean bottom seismic detection equipment. With the group ocean bottom seismometer (GOBS) and the use method thereof adopted, the delivery and recovery technologies and data collection of corresponding instruments can be realized, and new technical means can be provided for deepwater oil and gas exploration in China.