The optimizer considers star join optimization when appropriate and decides on star join plan based on cost considerations in order to come up with best execution plan for a star join query.
为了实现星型连接查询的最佳执行计划，优化器在适当的时候会考虑星型连接优化，并根据成本因素来决定星型连接计划。
The traditional optimization design is only based on the minimum cost objective function and does not consider the mechanical analysis target.
传统的优化设计仅以最低造价为目标函数，没有考虑结构的受力性能指标。
So, it is not a thing with misty nihility to that tax cost optimization research based on it, on the contrary, it has more realistic significance.
因此，基于信息技术的税收成本优化研究并不是一个虚无飘渺的东西，相反，则是非常具有现实意义的。
This paper first proposes a definition for equipment risk, and then formulates a cost-based equipment risk allocation optimization model.
文章对设备风险进行了定义，并构建了基于维护成本的设备风险分配优化模型。
There are two methods of database query optimization: cost-based and response time-based query optimization, all of which can improve the efficiency of complex query.
数据库查询优化包括两方面，基于代价的查询优化和基于响应时光的查询优化，可以有效地提高庞杂查询的效力。
A numerical result of an optimization design based on reliability and redundancy subject to cost in complex system is provided in the paper.
给出了一复杂系统在造价约束下的可靠度和冗余数的并发优化设计结果。
For this purpose, this paper presents a reuse cost optimization oriented, locality principle and instance set decomposition based component refactoring method.
为此，提出一种面向复用成本优化的、基于局部性原理与实例集分解的构件重构方法。
This paper presents an optimization of centered finite-difference operator based on the principle of constrained cost function, which can reduce the truncation error to minimum.
作者根据约束性代价函数原理提出了能够使得截断误差最小化的中心差分优化算子。
Based on the market participants' adjusting biddings, real-time congestion management is modeled as an optimization problem with the objective of minimizing total adjusting cost.
基于市场成员的调整报价，实时阻塞管理问题被描述为调整成本最小的优化问题。
Considering the communication cost and optimization qualities, an ant colony algorithm based on the coarse-grain model is designed to solve the problem of this model.
为求解该模型，并综合考虑优化质量和通信开销，采用了基于粗粒度模型的并行蚁群算法。
Then, optimization-based scheduling of pumped storage units with the concept of marginal unit and marginal cost is described across time intervals in the dispatch period.
然后，给出网流法在调度周期上跨时段采用边际机组与边际成本概念优化运行方式的算法。
Then, a method is developed for partner selection based on the cost optimization, and the result can be got with the way involved three phases.
并给出了任务分解的实现方法。对于伙伴选择，提出了一个基于成本的伙伴选择方法，并为该方法的实现提出了一个伙伴选择的三阶段优化方法。
Finally is logistics cost target optimization based on the value engineering.
最后是基于价值工程的物流成本指标的优化。
Practices showed that with the control system based on economic optimization strategies to manage crop growth and development, favorable control effects and lower cost were gained.
实践表明，按经济最优目标的控制策略来实现温室环境控制，既保证了作物正常生长的需要，又兼顾了经济成本。
An optimization model on life cycle net energy cost related to renewability of cassava-based ethanol blended gasoline fuels was given in this paper.
建立了木薯-汽油混合燃料考虑可再生性的生命周期净能源成本优化模型，并对木薯乙醇-汽油混合燃料考虑可再生性的生命周期净能源成本指标进行了优化。
Based on logistics cost optimization, the procedure of SM-CC is analyzed, and a model of order grouping is suggested and performed by self-adaptated GA.
计算结果表明，混合钢铁流程炼钢-连铸 浇次组合与排序计划算法是有效的，该算法已运用于生产实际，具有推广价值。
Based on logistics cost optimization, the procedure of SM-CC is analyzed, and a model of order grouping is suggested and performed by self-adaptated GA.
计算结果表明，混合钢铁流程炼钢-连铸 浇次组合与排序计划算法是有效的，该算法已运用于生产实际，具有推广价值。
应用推荐