并行执行

The results show: all processors have better load balance; when the ratio of the execution time of a point addition to that of a point doubling is 3 during computing the scalar multiplication, the parallel efficiency of the proposed algorithm is up to 90%.

结果表明：各并行处理器单元具有较好的负载均衡特性；当执行并行基点判断算法，其标量乘的点加计算时间是点倍数计算时间的三倍时，算法的并行效率可达90%。

The traditional query tree optimization methods,parallel database optimization methods based on left linear trees and right linear trees,bushy trees,and operation of the forest,have their own pros and cons,they have been more in-depth and maturity of the study.The query optimization method based on multiple weighted tree has studied its model of parallel query plan,its complexity model of parallel query plan and query optimization algorithms.The semantic query method transforms an inquiry into one or several semantic equivalence inquiries then has to find and implement a strategy to achieve a better query.Agent-based parallel database query optimization using Multi-Agent technology to automatically search the integrity constraint conditions which are related to the determined query,there for,the efficiency between several relations' joins has been greatly improved.The parallel optimization algorithm,based on genetic algorithm which is suitable for multi-joins of cluster environment,has deeply studied the relations storage options,multi-joins query optimization and query processing and other key technologies based on cluster parallel database.

传统的查询树优化方法，即基于左线性树、右线性树、浓密树、操作森林的并行数据库查询优化方法，各有优劣，对其的研究比较深入、成熟；基于多重加权树的查询优化方法，研究了其并行查询计划模型、并行查询计划的复杂性模型和查询优化算法；语义查询优化方法将一个查询变换成一个或数个语义等价的查询，进而寻找并执行这些等价查询中具有较好实现策略的一个；基于Agent的并行数据库查询优化采用Multi-Agent技术自动查找与给定查询有关的完整性约束条件，使得多个关系间连接操作的效率得到很大的提高；基于遗传算法的并行优化算法，深入研究了基于机群并行数据库中关系存储的选择、多连接查询优化和查询处理等关键技术。

According to the characteristics of CC NUMA parallel architecture, the authors propose some strategies and methods to optimize the communication of parallel programs by combining computing transformation and data transformation based on unified algebraic representation in this paper.

因此 ，如何通过并行编译优化提高并行程序在 CC- NUMA并行系统中的执行效率，有着重要的理论和实际意义。

These algorithms are very easy to parallelize.

这些算法很容易并行执行。

Here there are no data decencies between instructions and they can execute in parallel.

这里两个指令之间没有数据依靠，一次它们可以并行执行。

In fact ,most of divied programs of serial programs have relationship among them ,Rare of them can be divied into subprograms which have no relationship .If we try to reduce the relationship, we can also raise the Nuclear CPU efficiency of parallel execution.

但是实际中，绝大多数串行程序各个程序段中存在相关性，很少能将其划分成毫无相关的子程序，显然，若可以使各个划分程序段之间的相关程度降低，那么，也可提高双核CPU并行执行的效率。

These last two concepts allow you to build parallel executions of the process.

最后的两个概念允许你为活动创建并行执行。

Parallel execution helps systems scale in performance by making optimal use of hardware resources.

并行执行能够优化硬件资源的使用，从而使系统性能具备可伸缩性。

Strengths, weaknesses and appropriate uses are explained, along with configuration for maximum benefit and relevant initialisation parameters.

并且讨论了并行执行的优势、弱点、如何适当的使用，同时也包括了最大发挥其功效的配置和相关的初始化值。

Applications for such systems are naturally computer-intensive,and many such applications can be decomposed into multiple tasks or processes to run concurrently on multiprocessors.

该类系统的应用自然是计算机密集型的，且许多此类应用可以分解成可在多个处理机上并行执行的多任务或多进程。

As she looked at Warrington's manly face, and dark, melancholy eyes, she had settled in her mind that he must have been the victim of an unhappy attachment.

每逢看到沃林顿那刚毅的脸，那乌黑、忧郁的眼睛，她便会相信，他一定作过不幸的爱情的受害者。

Maybe they'll disappear into a pothole.

也许他们将在壶穴里消失