Sieve Methods, Exponential Sums, and their Applications in Number Theory: Representations by the Determinant and Mean Values of L -Functions
Sieve Methods, Exponential Sums, and their Applications in Number Theory: Representations by the Determinant and Mean Values of L -Functions
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筛法、指数和及其在数论中的应用：L 函数的行列式和平均值的表示
DOI：
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发表时间：
1997
期刊：
影响因子：
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通讯作者：
H. Iwaniec
中科院分区：
文献类型：
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作者：
W. Duke;J. Friedlander;H. Iwaniec
一种车装置，用于在分开的工件处理单元之间传送工件承载托盘，并相对于车行进方向横向地将托盘移入和移出所述单元。该装置包括具有用于接合托盘的头部组件的推拉装置。头部组件包括可滑动地安装在四轮滑架上的框架，用于在滑架上的向前和向后位置之间相对移动。枢转地安装在框架上的钩构件通过将框架移动到这些交替位置而从托盘存放模式移动到托盘收回模式。在推动行程期间，通过头部组件的向前运动结合当可滑动框架上的缓冲器接合待装入处理单元的重载托盘时遇到的对该运动的阻力，框架被移位到向后位置。在拉动行程期间，当框架上的悬垂凸耳被推靠在位于轿厢上的弹性安装的支座上时，框架被复位到其向前位置。
A car apparatus for transporting a workpiece carrier tray between separate work processing units and transferring the tray into and out of the units laterally with respect to the direction of car travel. The apparatus includes a push-pull means having a head assembly for engaging the tray. The head assembly comprises a frame slidable mounted upon a four wheeled carriage for relative movement between forward and rearward positions on the carriage. A hook member pivotally mounted on the frame is moved from a tray depositing mode to a tray withdrawing mode by shifting the frame into these alternate positions. The frame is shifted to the rearward position during a push stroke by the forward movement of the head assembly in combination with the resistance to this movement encountered when a bumper on the slidable frame engages a heavily laden tray to be charged into a processing unit. The frame is reset to its forward position during a pull stroke when a depending lug on the frame is pushed against a resiliently mounted abutment located on the car.