分析了宝石磨削过程中的夹具针杆的受力模型，建立了基于因次解析法的夹具针杆磨削力计算公式。
The force model of the jig needle bar in the process of grinding diamonds were analyzed, and the calculation formula of grinding force was established.
导出了在牛顿传热律下联合循环无因次功率、效率的解析式，并通过数值算例得到它们之间的关系。
The analytical formulae about dimensionless power output, efficiency of the combined Brayton and Stirling cycles are derived. And the relations among them are studied by detailed numerical examples.
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