黄金比例搜索算法/黄金分割法/0.618法/Golden Section Search/Golden Ratio Search 表达的都是同一个东西，它是一种精确的一维搜索（line search）算法。黄金比例搜索算法只需要计算目标函数值，而无需计算导数之类的值，因此用起来非常容易，应用广泛。(Golden ratio search algorithm / golden section method, /0.618 method, /Golden, Section, Search/Golden, Ratio, Search expression is the same thing, it is a precise one-dimensional search (line, search) algorithm. The golden ratio search algorithm only needs to calculate the value of the objective function, and does not need to calculate the value of derivatives, so it is very easy to use and is widely used.)