计算的关键在于性能函数及对象模型的离散化。
The key problem for the computation lies in the discretization of the process model and the performance index.
系统的性能函数是含有指数项和故障输入项的积分二次型函数。
The cost function of the systems is given in terms of integral quadratic function including both index exponent and failure controls.
在RBF神经网络的学习过程中，根据性能函数调节学习率，可以加快学习的收敛过程。
During the process of learning the RBF neural network, one can accelerate the converging process of learning by regulating the learning speed according to a performance function.
本文给出了连续系统中计算二次型性能函数对反馈系数阵的一阶和二阶灵敏度的全套公式。
A set of formulas for the computation of quadratic performance function associating with first and second-order sensitivities of feedback coefficient matrix is given in this paper.
针对每个离散角速度，依据影响系数法，采用包含残余振动值和校正不平衡的广义线性二次型目标性能函数推导出控制律。
For each discretized angular speed, the control law is derived from the generalized linear quadratic objective performance function including residual vibration measurements and imbalance correction.
考虑到粘弹性材料阻尼性能随环境的非线性变化，运用GRNN(广义回归网络)对粘弹阻尼材料动态力学性能函数进行逼近，并构建预测模型。
Considering the non-linear behavior of the viscoelastic material according to the change of environment, the GRNN is used to make a model to predict the dynamic property of the material.
最后，讨论了使用这些函数时的常见问题和性能考虑。
Finally, it discussed the common problems and the performance considerations while using these functions.
在这种情况下，性能会非常出色，完成事务的时间可以接近一次函数调用的时间。
In this scenario, performance would be superb, and transactions would complete in times approaching those of a function call.
我们看到了定义这些函数的更规则的语法，这可以通过操作码缓存来优化性能。
We see a much cleaner syntax for defining these functions, which can be optimized for performance by opcode caches.
不能下推的函数和操作会大大影响查询的性能。
Functions and operations that cannot be pushed down can greatly impact query performance.
使用这个函数通常可以减少缓存缺失和停顿，从而提高性能。
Using this function can generally result in better performance by minimizing cache misses and stalls.
这一部分包含用C编码的几个示例，它们将说明构建有效的自定义性能监视应用程序所需的许多关键要素和函数。
This section contains several coding examples in c, illustrating a number of key principles and functions needed to build an effective custom performance monitoring application.
例如，通过对那些经常调用的函数进行优化，您就可以用最少的努力来获得最佳的性能。
For example, by optimizing those functions that are called most often, you can get the greatest performance benefit from the least amount of effort.
会在规则执行中影响性能的柱状测试及函数已通过加粗来突出显示。
The columnar tests and functions that can impact performance on the execution of the rule are highlighted in bold.
函数索引是一种强大的性能调优工具。
Functional indexes can be a powerful performance tuning tool.
不幸的是，在大部分的时间里，由于它对于性能方面的影响，解析器的消息验证函数不能被启用。
Unfortunately, a majority of the time, the parser's message validation functions are not enabled due to its impact on performance.
查询用在PDH函数调用中更新它管理的计数器，因而获取性能数据。
Queries are used within PDH function calls to update the counters it manages, thereby obtaining performance data.
因为MASS向量函数要比对一个标准库函数的重复访问快很多(倍数接近30倍)，所以最后得到的性能改善效果将会是惊人的。
Since the MASS vector functions are much faster (by a factor of up to about 30) than a repeated call to a standard library function, the resulting performance improvement can be substantial.
将本地列定义为DATE类型比较方便，因为这样可以允许涉及DATE文字但是不需要覆盖函数(对性能有影响)的谓词。
Defining the local column as DATE is convenient because it allows predicates that involve DATE literals, but does not require casting functions (which tend to impact performance).
当应用程序深入使用这些时间函数时，更有效地使用这些与时间有关的函数，可以改进程序的整体性能。
When the application makes an intensive use of timing functions, a more efficient implementation of the timing routines can improve the overall performance of the program.
有时候，不必要地频繁调用一个函数会造成性能问题。
Sometimes poor performance can be a result of a function being used more frequently than expected.
使用动态sql对性能有轻微影响，但是比使用生成的abap函数运行相同查询快得多。
Using dynamic SQL results in a minor performance hit, but it is much faster than running the same query using a generated ABAP function.
当解析器读写大型文件(特别是文本格式的大型文件)时，并不能达到其读取较小的文件或计算简单函数时的性能。
They don't work as well with reading large files, particularly in text format, as they do with reading much smaller files or calculating simple functions.
应用程序开发人员会很喜欢新的标量函数，尤其是日期和时间函数，它们会提高处理性能。
Your application developers will like the new scalar functions, especially the date and time functions that will provide performance boosts for processing.
希望我们介绍的这些创建和使用函数索引的方法能够帮助您改善查询搜索的性能。
Hopefully by seeing the various ways that functional indexes are created and used, you will be able to use them to improve the performance of your query searches.
性能概要用函数调用的图示突出应用程序的性能瓶颈并增强应用程序的可理解性。
Performance profiling to highlight application performance bottlenecks and improve application understanding with a graphical representation of function calls.
PHP5中对面向对象的函数进行了重新编写，允许更多函数和功能提供更佳的性能。
The object-oriented function was rewritten for PHP 5, allowing for better performance with more function and features.
当我们要执行的基于 Web 的商店调用该价格函数时，由于许多远程调用请求该ERP系统，性能非常糟糕。
When the Web-based store we had to implement called this price function, the performance was very bad because of the many remote calls to the ERP system.
通常情况下，由于 make_parser()函数已经能获得expat提供的性能，因此纯速度的差异很小。
The raw speed differences are likely to be minimal since the make_parser() function already manages to get the performance expat offers for general cases.
通常情况下，由于 make_parser()函数已经能获得expat提供的性能，因此纯速度的差异很小。
The raw speed differences are likely to be minimal since the make_parser() function already manages to get the performance expat offers for general cases.
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