The mediation can select services based on the endpoint or on the service quality, such as response time and execution cost.
中介可以基于端点或服务质量(例如响应时间和执行成本)选择服务。
Additionally, clients can select among multiple Web services based on different parameters, such as response time and execution cost.
此外，客户端可以基于不同的参数在多个Web服务之间做出选择，例如响应时间和执行成本。
Other options for dynamically selecting Web services (such as complex expressions that determine least execution cost or the best quality) are not covered here.
本文不介绍用于动态选择Web服务的其他选项(例如确定最低执行成本或最佳质量的复杂表达式)。
It estimates the execution cost of each potential access plan based on the statistics data stored in catalog and statistics tables, and selects the one with the lowest cost.
它会基于存储在目录和统计表中的统计数据而评估每一个可能的存取计划的执行开销，然后选择最低开销的存取计划。
While it may seem that the access plan in Figure 5 is simpler, it comes with a higher estimated execution cost because no index could be exploited to filter out non-qualifying rows.
虽然看上去图5中的访问计划更简单，但是它的预计执行成本更高，因为不能利用索引过滤不符合要求的行。
This algorithm is able to schedule tasks according to the actual execution cost of tasks.
这个算法根据任务的实际执行代价来调度任务。
The way to lower the policy execution cost mainly lies in a sound policy system, strengthening the coordination between the policy systems and optimizing the policy resources.
降低政策执行成本的路径主要在于健全政策体制，加强政策系统之间的协调，实现政策资源的优化。
The simulation results show that MCUD algorithm further decreases the total execution cost and total execution time while meeting the user-designated deadline in comparison with other algorithms.
仿真实验表明，MCUD相比于其他算法，在满足总的最后期限的前提下更进一步地降低了执行成本和执行时间。
The simulation results show that MCUD algorithm further decreases the total execution cost and total execution time while meeting the user-designated deadline in comparison with other algorithms.
仿真实验表明，MCUD相比于其他算法，在满足总的最后期限的前提下更进一步地降低了执行成本和执行时间。
应用推荐