| 1. | Some solution methods are discuss ed and a direct optimization method is presented
本文讨论了一些求解区间线性方程组的方法并提出了一种直接优化法。 |
| 2. | Two examples are pre sen ted to illustrate the computational aspects of the direct optimization method an d other methods
文中给出了两个算例，列出了本文算法与其他算法的结果比较。 |
| 3. | Sigplan 1990 conf . programming language design and implementation , white plain , ny , june 1990 , pp . 16 - 27 . 13 smith m . overcoming the challenges to feedback - directed optimization
我们首先把重点放在块文件配置上，即找到基本块在用户程序的执行频度，再把这一技巧扩展到边文件配置和阶段迁移的检测上。 |
| 4. | In the interpreter , a front - end / back - end architecture is used to achieve a good degree of portability and extendibility , and a feedback - directed optimization framework is used to improve the interpreter ' s performance . also , the interpreter provides the host environment with a set of well - defined apis
该框架利用后端程序动态运行信息，制导前端进行优化决策，在不降低系统可用性的前提下，选择出最有效的优化策略，从而使性能得到提高。 |
| 5. | The method employs a recently developed direct optimization technique that uses a piecewise polynomial representation for the state and controls , thus converting the optimal control problem into a nonlinear programming problem . the method is remarkably robust to initial guesses , which is better than traditional method
这种方法利用了近些年来发展起来的直接优化技术，用分段多项式来表示整个轨道的状态和控制向量，将最优控制问题转化为非线性规划问题来研究。 |
| 6. | The inside arithmetic is for optimal network planning with given substation sites applying the minimum cost and maximum flow method . based on the optimal network - planning arithmetic , the outside arithmetic is for the optimal coordinates of substation position by using one of the nonlinear optimization methods - direct optimization
内层优化结合最小费用最大流法给出了在变电站站址坐标给定时的最优网架算法；外层优化通过调用网架优化算法，运用非线性规划中的步长加速法实现变电站站址坐标的最优化。 |
| 7. | The essay adopts direct optimization since various limits on sewage pipe net , occasional change on topography , and direct , easy - looking , and effortless examing characteristic on direct optimization , . dual optimization is one of the direct and it mainly focuses on optimizing sewage pipe net from two aspects , namely to choose velocity of flow as slow as possible and speed of filling as fast as possible with the precondition of meeting various limits on sewage pipe net
鉴于污水管网约束条件较多，而且地形有时千变万化，直接优化法具有直接、直观和容易验证的特点，所以本文采用直接优化法。两相优化法是直接优化法的一种，它的核心主要是从两个方面来对污水管网进行优化设计，即在满足污水管网各种约束条件的前提下，一是选择尽可能小的流速，二是选择尽可能大的充满度。 |
| 8. | As a important component in cppm - gis , this paper illustrates detailedly the mathematics model of optimum design and direct optimization method for drainage pipe - net under gis . as a key stage in planning and designing the drainage system , the caculation of pipe - net is very critical and time - consuming . this paper brings forward the recursive arithmetic for pipe - net and pipeline designed - discharge
在cppm - gis系统中，水力计算模块是一个重要的组成部分。本文详细论述了gis环境下建立排水管网优化设计的数学模型、排水管网的直接优化法。 |
| 9. | In the computational methods of tpbvp , in order to reduce some difficulties involved in solving a tpbvp via adjoint variables , we discuss a direct method in which state and control variables are indirectly parameterized , the method employs a recently developed direct optimization technique that uses a piecewise polynomial representation for the state and control variables , thus converting the optimal control problem into a nonlinear programming problem , which can be solved numerically . it makes the initial iterative variable more easy to be determined
在数值解法中，为了减少解决两点边值问题共轭变量带来的困难，主要讨论了将状态变量和控制变量进行参数化的一种直接方法，这种方法采用了近段发展起来的使用分段的多项式来代替状态和控制变量的直接优化方法，然后最优控制问题就转化成可以用数值方法解决的非线性规划问题，使得迭代初值更加容易选取。 |
