conjugate descent method的用法和样例：
例句
- Conjugate gradient methods are efficient to minimize differentiable objective functions in large dimension spaces.
摘要共轭梯度方法是求解大规模优化问题的一种非常有效的方法。 - In this paper, the two-point stepsize gradient method which together with one new nonmonotone line search technique is proposed.
摘要给出一个两点步长梯度方法，其将与一个新的非单调线搜索技术相结合。
