水库群优化调度新思路──逐级模拟复合法

针对某一利用湖泊群作为调蓄水库的多级调水工程优化调度问题提出逐级模拟复合法。求解表明：具有一定调度规则的模拟方法在水库优化调度中有着与动态规划法几乎相同的择优效果，即两者所得的最优调度轨迹完全一致或十分接近，但模拟方法大大减少了计算时间。

禁忌模拟退火复合形法及其在边坡稳定性分析中的应用

对于随机生成的初始复形,首先,选取与其他顶点相似程度最大的顶点进行禁忌退火操作,禁忌退火产生新顶点的区域限于该点和其余各顶点的中心点连线上,若关于该点的禁忌退火没有产生新的顶点,即禁忌退火失败,则选取与其他顶点相似程度次大的顶点进行退火,直至关于复形全部顶点的退火操作均失败;然后,对当前的复形进行改进的复合形法计算,采用与基本复合形法类似的映射收缩算子迭代至收敛。禁忌模拟退火复合形法不仅考虑了目标函数的改进,而且保持了各顶点的多样性,避免了基本复合形法容易陷入局部极优的缺点。对2个非均质土坡的临界滑动面进行搜索表明,该方法具有较高的寻优成功率。

Verification of Seismic Performance of Pile Foundation in Composite Ground through Experimental and Numerical Methods

A new construction method of pile foundation in composite ground, in which, prior to installing piles, the ground is improved around the heads of the piles in soft ground or ground subject to liquefaction, which is introduced in this paper. This construction method uses a combination of pile foundation construction together with common ground improvement methods, including deep mixing, preloading and sand compaction piling, and it is referred to as the composite ground pile method. Since an artificial ground with relatively high rigidity comparing with that of the original ground was formed around the pile in this method, and the seismic performance has not been made clear, thus the seismic performance of piles in composite ground was systematically analyzed through a series of centrifuge model tests and numerical analyses by using dynamic nonlinear finite element method, and a verification method for the seismic performance of piles in composite ground was proposed on the basis of the experimental and numerical results.