cycle criterion

The sunspot number of Cycle 21 attained its peak 165.3 at 1979.9. To judge on various prediction results of Cycle 21, the criterion 165.3 ± 16.5 and 1979 ± 0.5 year are suggested.

第21周的太阳黑子数于1979.9（1979年12月）到达它的峰值165.3。本文提出用165.3±16.5和1979.9±0.5年的容许变幅，来检验第21周多种多样的预测结果。

New Low Cycle Fatigue Life Criterion under Nonproportional Loading Based on Critical Plane Methods

新的非比例加载低周疲劳寿命估算方法

The system is considered as a multi-stage decision process, the cycle efficiency is its criterion function, the quantities of the abstracted steam are control variables and the feedwater temperatures are state variables.

将给水回热系统视为一多级决策过程，循环效率为其目标函数，抽汽量为控制变量，而给水温度则为状态变量。

The ideas such as digital phase-locked integration, program-mable PID control and variable cycle speed stabilizing criterion etc, are proposed and applied to the design of the control of rotating platform system.

提出数字锁相积分、可编程PID控制及变周期稳速判据等概念，并应用于转台控制器设计。