Rather than strive for optimization of any function, a large system can only survive by "satisficing" (making "good enough") a multitude of functions.
与其费劲将任一功能做到最优，不如将多数功能做到"满足"（使“恰好”），这才是大型系统的生存之道。
How to process user defined functions incorporated in declarative query languages efficiently is an important aspect of query optimization.
如何高效地处理说明性查询语言中嵌入的用户自定义函数，是查询优化的一个重要内容。
Finally, the algorithm is tested by three test functions of numerical optimization. The emulational experiment results show that this improved algorithm has greater probability of convergence.
最后，用数值优化中的三个测试函数对该算法进行测试，仿真实验结果显示该算法可有效地提高算法的全局搜索能力。
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