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Copyright of Control Theory & Applications / Kongzhi Lilun Yu Yinyong is the property of Editorial Department of Control Theory & Applications and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Telecommunication Engineering is the property of Telecommunication Engineering and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

In order to improve the drilling efficiency and reduce the weight of the anchor recycling equipment,it took spiral drill pipe of the anchor recycling equipment as the research object,by selecting the inner and outer diameter of the drill pipe,blade thickness,pitch,helix angle,speed,blade number and blade height as the optimizing parameters. It chosen the highest efficiency in transport,the lightest in weight and the highest rate in secondary crushing as the ideal goal of the drill pipe optimization,the result indicates that the drilling efficiency is increased by 31. 4%,the weight is reduced by 12. 7% and the secondary crushing rate is increased by 48. 7% based on particle swarm optimization. The efficiency of the recovering has been improved,and the wear-resisting degree and intensity of the spiral pipe have been enhanced.

In the life cycle management of equipment, how to strengthen the management of the use of equipment and give full play to the benefits of the use of equipment has become an important issue in the current management of equipment. By carrying out maintenance work, it can effectively prolong the service life of teaching equipment, improve the intact rate and utilization rate, and is the basic guarantee for its utilization efficiency. Carrying out the maintenance work of teaching equipment, a university needs to formulate an excellent maintenance system and mechanism, effective supervision by relevant functional departments, also needs the unit which holds the equipment to attach great importance, and needs equipment managers to have a high sense of responsibility and technical level. [ABSTRACT FROM AUTHOR]