Based on energy theory, a simple critical force calculation for pressed beam with variable cross sections is derived. It reduces the complex integration algorithm into a simple algebraic operation.
以能量原理为基础，推导出变截面压杆计算临界力的简便方法，把复杂的积分运算归结为一个简单的代数运算。
This paper intends to expound some important definitions and conclusions in real variable function by using algebraic operation, thus making a new approach to the use of computers in this field.
对实变函数中某些重要的定义和结论运用代数运算的方法作统一处理，从而为电子计算机在该领域的应用作一探索。
Then the mathematical description of operation relativity is given systematically from algebraic specification, Gantt chart expression and type conversion.
进一步提出在经典的车间作业计划析取图模型中，通过加入相关弧以表示工序的相关性。
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