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1021results about How to "Smooth change" patented technology

Variable-gap roll shaft fruit and vegetable classifier

The invention discloses a variable-gap roll shaft fruit and vegetable classifier; a driving chain wheel drives a driven chain wheel to rotate by a chain which is evenly distributed with sorting rollers; a plane classification bed is formed by a roll surface of the sorting roller on an upper layer chain, and a plane belt-type conveyor is positioned under the plane classification bed; at the two ends of each sorting roller shaft, a pushing roller wheel is positioned on the sorting roller shaft at the outer side of the chain, and a guide roller wheel matched with a guide rail is fixedly arranged on the sorting roller shaft at the inner side of the chain; the two sides along the longitudinal direction of a stander are respectively provided with a spiral conveying shaft by a bearing seat, and the two spiral conveying shafts are parallel to each other; a motor leads the two spiral conveying shafts to have the consistent rotating shaft and the opposite rotating directions by a transmission device; the screw pitches of the I and the III sections of the spiral conveying shafts are more than that of the II section thereof; the pushing roller wheels are matched with spiral pushing grooves of the spiral conveying shafts; the screw pitch of the II section of each spiral conveying shaft is adjusted, so that the gaps among the sorting rollers running to the II section of the spiral conveying shafts are larger than the diameters of selected fruits; and a feeding groove is arranged above the surface of the I-section sorting roller. The variable-gap roll shaft fruit and vegetable classifier has simple structure, high operation efficiency, stable changing process of the gaps of the sorting rollers, and high classification accuracy rate.
Owner:INST OF AGRI MECHANIZATION XINJIANG AGRI INST +1

Pervasive service-oriented adaptive network congestion control method

The invention relates to a pervasive service-oriented adaptive network congestion control method. The method comprises the following steps that: a source node for transmitting information measures round-trip time (RTT) of a target node for receiving the information, wherein when the ratio CSRTT of the latest measuring value to the minimum of the historical RTT is increased, the congestion is caused by too many packets forming a line in an intermediate network node; the target node distinguishes the received data packet is a normal data packet or is a packet-pair used for detecting bandwidth and feeds the estimated available bandwidth back to the source node; according to a feedback signal, the source node distinguishes the congestion states with four levels according to a preset rule and uses the four congestion states as a basis of speed adjustment; when a new connection exists, the target node transmits three repeated acknowledge characters (ACK) of the last received data before switching; and the source node resets a slow start threshold by using the result after receiving an acknowledgment packet which is not data bursting one window, but data for only transmitting two back-to-back packets to detect the available bandwidth on a new path.
Owner:TIANJIN UNIVERSITY OF TECHNOLOGY
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