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172results about How to "Improve effectively" patented technology

Process for continuously producing polybutylene terephthalate

Polybutylene terephthalate having good heat stability and excellent hydrolysis resistance is continuously produced in a series of a first reactor for reacting an aromatic dicarboxylic acid comprising terephthalic acid as a main ingredient or a derivative thereof with a glycol comprising 1,4-butanediol as a main ingredient, thereby producing an oligomer with an average degree of polymerization of 2.2 to 5, a second reactor for polycondensating the oligomer from the first reactor, thereby preparing a low polymerization product with an average degree of polymerization of 25 to 40, and a third reactor for further polycondensating the low polymerization product from the second reactor, thereby producing a high molecular weight polyester with an average degree of polymerization of 70 to 130, or followed by a fourth reactor for further polycondensing the polyester from the third reactor to an average degree of polymerization of 150 to 200, thereby producing a high molecular weight polyester. Another third reactor or a plurality of third reactors can be provided in parallel to the third reactor, thereby producing different kinds of polybutylene phthalate with different degrees of polymerization from that produced in the main line of the third and fourth reactors or adjusting operating conditions of each of a plurality of the third reactors to increase kinds, precise quality.
Owner:HITACHI LTD

Method for network anomaly detection in a network architecture based on locator/identifier split

The present invention relates to a method for detecting Network Anomaly in network architectures based on locator/identifier split, the detection flow is as follows: initialization processing, and in ITR: processing data packets, sending a Map-Request, determining whether to send an additional Map-Request, sending the data packet, processing the Map_Reply, processing EID-to-RLOC Cache entry expired; in ETR: processing data packet, processing Map-Request, determining whether the traffic of the ITR currently sending the Map-Request is abnormal, replying to the ITR of which the query traffic is abnormal, replying to ITR of which the query traffic is abnormal. With respect to the characteristic that the network architecture based on locator/identifier split needs to query the relationship between the locator and the identifier for packet delivery, the present invention detects Network Anomaly based on query traffic instead of network data packet traffic. Thus the present invention has the advantages of effectively reducing the investment on detection device, The overhead of exchanging monitoring information and the detection system maintenance cost; facilitating cross domain coordination; and efficiently handling the failures occurring during network operation in time; effectively improve the reliability of the network, being suitable for a large-scale network.
Owner:UNIV OF ELECTRONICS SCI & TECH OF CHINA

Front-feeding numerical control machine tool for machining pipes

The invention provides a front-feeding numerical control machine tool for machining pipes. The front-feeding numerical control machine tool comprises a machine tool body, a working platform is arranged on the machine tool body, a workpiece clamping device is arranged on one side of the working platform, a tool rest is mounted on the working platform, a lathe tool or a milling tool is mounted on the tool rest, the workpiece clamping device is in transmission connection with a spindle motor and comprises an outer sleeve and a spindle, the spindle is arranged in the outer sleeve which comprises an expansion end and a fixed end, the spindle comprises a tapered end and an extension end, the expansion end of the outer sleeve sleeves the tapered end of the spindle correspondingly, the outer sleeve is axially separated into N parts at the expansion end and fixed integrally at the fixed end, the outer diameter of the tapered end of the spindle gradually diminishes from an end portion to the extension end, and the extension end of the spindle is connected with a first air cylinder. The front-feeding numerical control machine is reasonable in structure, capable of working automatically, safe in working process, and high in producing efficiency and yield rate.
Owner:上海通实机器人制造有限公司
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