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log rolling
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     The pilot's Log
     飞行员日志
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     Log is necessary.
     记录日志是项目开发必不可少的部分.
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     R~3then log(u) is strictly convex.
     )为的允许解,则-log(-u)严格凸。
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     Rolling Stones
     “滚石”:布莱恩·琼斯之死
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     The application of rolling
     介绍滚动装置在大型多点焊机中的应用,并对应用中的问题进行了详细探讨
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The author of this paper has given an assumption that the log dropoutprocess may be divided into two stagges.In april,1981,the experiment wasconducted in the laboratory of the North-Eastern College of Forestry andproved that there exist two stages. On the basis of the experiment,the author further presents the theory ofthree stages in the log dropout process as follows: 1. The first stage:the toggles are tilted and turned around one track ofthe conveyor(Fig.1,b).The tilt of the toggles gives the...

The author of this paper has given an assumption that the log dropoutprocess may be divided into two stagges.In april,1981,the experiment wasconducted in the laboratory of the North-Eastern College of Forestry andproved that there exist two stages. On the basis of the experiment,the author further presents the theory ofthree stages in the log dropout process as follows: 1. The first stage:the toggles are tilted and turned around one track ofthe conveyor(Fig.1,b).The tilt of the toggles gives the log a selfdropoutpower. 2. The second stage:the toggles are rotated around the pull organ(chains or wire rope,Fig.l,c).It gives the proper condition to drop the log. 3. The third stage:the log rolled down from the toggles. This paper points out that the first and the second stages are mostimportant for log dropout. Finally some parameters for determing the log dropout performance,suchas log dropout time consumption,log diameter,log eccentricity and the logcurvature are discussed in the paper.The experiment and analysis show thistype of the log dorpout system by gravity with collapse of the toggles givesa minimum dropout time consumption and all kinds of logs can be dischargedfrom the conveyor.

通过试验,作者提出了抛木过程三阶段的理论,即:第一阶段。承载梁绕输送机一轨道转动呈倾斜,这种倾斜给原木自抛一个动力;第二阶段,承载梁绕牵引构件翻转,这种翻转给原木抛落创造了条件;第三阶段,原木从承载梁上滚下来。然后,讨论了决定抛木性能的几个参数。试验和分析表明,翻梁式重力抛木机抛木时间最短,各种原木均能抛落。

 
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