Abstract: Disclosed are a preprocessing method and device for distance transformation. The method includes: acquiring a first grid map; calculating a second parameter of a vehicle model; calculating a precision of a second grid map according to the second parameter of the vehicle model and a precision of the first grid map; calculating the numbers of rows and columns of the second grid map according to information on the first grid map, the precision of the second grid map and the second parameter of the vehicle model; determining for each cell of the second grid map a state value according to the numbers of obstacle cells within said each cell; and determining in the first grid map at least one cell requiring no processing, according to the state value. Therefore, during the distance transformation, the processing speed for determining the distance value of each cell is increased.

Abstract: Disclosed are a preprocessing method and device for distance transformation. The method includes: acquiring a first grid map; calculating a second parameter of a vehicle model; calculating a precision of a second grid map according to the second parameter of the vehicle model and a precision of the first grid map; calculating the numbers of rows and columns of the second grid map according to information on the first grid map, the precision of the second grid map and the second parameter of the vehicle model; determining for each cell of the second grid map a state value according to the numbers of obstacle cells within said each cell; and determining in the first grid map at least one cell requiring no processing, according to the state value. Therefore, during the distance transformation, the processing speed for determining the distance value of each cell is increased.

Abstract: An LED lamp heat dissipation structure includes a drive circuit installed on a lamp holder. A housing is fitted on an insulation inner sleeve to form a first air flow gap therebetween. Both the insulation inner sleeve and the housing are installed on the lamp holder. The housing is provided thereon with an air vent. An aluminum substrate is installed on the housing. A second air flow gap is formed between the aluminum substrate and the insulation inner sleeve. A LED lamp plate is installed on the aluminum substrate. A lamp cover covers the LED lamp plate. An air flow through hole is formed from the surface of the lamp cover to the aluminum substrate. The air flow through hole is in communication with the air flow gaps. The present invention has a very good heat dissipation effect and prolongs the service life of the entire lamp.

Abstract: An energy-saving fluorescent lamp with two or more integrated-shaping discharge tubes, automatically formed by a one-shot modelin to a U-tube with a desired curvature. Each of discharge tubes are disposed upon a conveyer for being shipped into a heater and is treated in portions of the discharge tube by one or more said wide flame nozzles of preset temperatures for a preset duration simultaneously into a U-tube with a pair of leg tubes for fitting into a pair of integrated-shaping dies when said mechanic arm opens up said pair of dies for molding into a U-tube with a preset curvature radius.

Abstract: The present invention relates to multi-tube compact fluorescent lamp which includes at least two unitary light tubes connected together. Each unitary light tube is made of a single glass tube and has an enlarged portion. The enlarged portion of each unitary light tube has a plane side to be near to an adjacent unitary light tube. This structure is easy to manufacture and adapted for industrial production, has a compact configuration, provides greater power and better decoration, and is adapted for traditional light head and light shell.

Abstract: The invention discloses an energy-saving fluorescent lamp with automatically formed by a single step, and the forming method and the mould of the U-shaped tube unit. The energy-saving fluorescent lamp is formed of several single-tube units which are connected to each other with connective bridges, additionally, two walls of one tube unit are parallel to each other, and two walls also are adjacent tightly to each other. The bending direction of the two walls is the same. The advantages of the lamp are effective light utilization, short tube length, and sufficient radiation, and the lamp is automatically single forming in industry Therefore, the lamp can work with small power, and also has low cost, high efficient, and low rejection ratio.