所以，与简单地优化索引相比，这里的设计决策更加复杂。对这些特性的使用必须加以协调，才能将性能发挥到极至。
So, design decisions are more complicated than simply optimizing indexes; the use of these multiple features must be coordinated to achieve full potential performance.
为获得最佳性能，开发人员必须掌握JDBCAPI，并利用诸如批处理和结果优化之类的特性。
For optimal performance, developers must master the JDBC API and exploit features such as batching and result optimizing.
当查询性能中出现例外情况时，优化指南和统计视图特性对于弥补访问计划估计的不准确性非常有用。
Optimization guidelines and statistical views are useful features to compensate the access plan evaluations when exceptions in query performance occur.
本文中将介绍如何通过使用Xerces本机接口(XNI)和设置Xerces2的特性和属性来实现应用程序性能的优化。
Here, we show how you can optimize the performance of your application by using the Xerces Native Interface (XNI) and configuring features and properties specific to Xerces2.
已有的优化技术也应作为整体优化和应用性能特性调整分析的一部分来考虑。(见下)。
Existing optimization techniques should also be considered as part of a holistic optimization and tuning analysis of your application's performance profile (see sidebar).
性能分析结果表明，协议配置参数具有可优化特性，采用分块消息日志策略能够优化协议性能。
Theoretical results show that protocol overhead ratio can be reduced by right configuration parameters fitting into system characteristics. Our scheme can optimize protocol performance.
精确测定不同铸造合金的凝固特性对于优化铸造工艺、获得满足性能和尺寸要求的铸件具有十分重要的意义。
To test solidification characteristics of various casting alloy accurately is very significant for optimizing casting technique and getting castings with sound property and appropriate dimensions.
理论分析结果表明，协议配置参数具有可优化特性，采用分块消息日志策略能够优化协议性能。
Theoretical results show that protocol overhead ratio can be reduced by right configuration parameters fitting into system characteristics.
应用数值方法，分析并讨论了热机在最大输出功率、最大效率和最大生态学函数下的优化循环性能特性。
By using numerical solution method, the optimal cycle performance characteristics of the engine at maximum power output, maximum efficiency and maximum ecological function are analyzed and discussed.
叠层复合是一种新型的复合构型，它具有提高材料断裂韧性和抗弯强度的优异特性，对优化陶瓷的力学性能十分有效。
Laminated composite has a new type structure which is used to improve the fracture toughness and flexure strength, so it is a good material for optimizing the mechanical properties.
并测量了与激光器输出特性相关的电路参数，为该激光光源性能的进一步优化提供了依据。
Then the circuit parameters related to the output characters of the laser were measured to supply the gist of the further optimization of the laser source.
弧焊电源的输出动态特性的研究，对优化焊机性能、焊接过程控制和改善工艺效果有重要意义。
Study of the dynamic output characteristics of arc welding power supply is of great significance for optimization of welder design, control of welding process and improvement of welding quality.
粗糙表面激光回波偏振特性是激光探测、目标识别等领域的一个重要研究内容，它对激光雷达、红外探测和目标识别等遥感设备的优化设计和性能改善有很强的促进作用。
The laser backscattering polarization characteristics of rough surface are investigatedin this paper, it is a fundamental issue to laser detection, target recognition and other fieldsof study.
同时根据气封间隙泄漏流的流动特性，采用一种针对静叶流道的优化方法，以期改善泄漏流对压气机整体性能的影响。
According to the properties of cavity flows, a certain optimization method is applied on the hub in order to improve the performance of compressors.
为了解决工程研制中某型涡扇发动机性能调整与优化问题，建立了关键截面调整对发动机特性影响的数学模型并开发了相应的程序。
A model of optimizing the turbofan engine performance by adjusting the key sections of components and the program based on the model were developed.
研究表明，应用新方法设计优化得出的IGCC系统性能特性更加贴近实际运行情况与需求。
The traits of optimal design and the characteristic rules in all operating states of IGCC system are studied in this paper based on the idea of all operating mode and independent variable.
所建立空载磁路模型及三维有限元分析方法为该新型电机的优化设计、性能分析以及负载特性进一步研究奠定了基础。
Equivalent magnetic circuit model and 3d finite element method developed in this paper are helpful to the more study on optimizing design and full-load characteristic of IPM-HESM.
通过本文研究，对脉冲功率源系统的放电特性有了比较深入的了解，对于优化脉冲功率源系统设计，提高系统性能具有一定的指导意义。
According the research of this paper, deeply comprehend the discharging characteristic of pulsed power system. It has a guiding significance to optimize the design of pulsed power system.
除了优化混合料级配外，沥青胶结料的流变特性对这一路用性能也起着关键作用。
Besides optimum aggregate grading, bituminous binder's rheological property play a key role in the pavement performance.
本文对回热器的长度、水力半径或板叠间隙、回热器在驻波声场中的位置等回热器特性参数对其性能的影响进行了模拟分析，并在此基础上对回热器或板叠特性参数进行了优化。
In this paper we describe simulation analysis and optimization on the characteristic parameters of regenerator, such as the length, the spacing of plates, the position in sound field of regenerator.
预测了紧急停车和起动过程中突然停电等工况下带式输送机的动态特性，并通过选择飞轮质量来达到控制和优化其性能的目的。
Dynamic characteristics of the belt conveyor under conditions that power supply fails suddenly during stopping and starting are predicted by simulation to control and optimize them.
本研究通过研究刻槽水泥混凝土路面抗滑机理和噪声特性，分析刻槽参数对路面抗滑及噪声的影响，以期优化刻槽参数，达到提高刻槽水泥混凝土路面抗滑性能、降低噪声的目的。
This paper studies on anti-sliding mechanisms and noise characteristics of grooved PCC pavement, and analyses the groove structure's influence on the skid resistance and tire-pavement noise.
本文以冷却塔综合性能最优为目标，结合逆流式泠却塔的热力计算特性，对逆流塔的热力性能进行优化设计。
In this paper, count flow cooling tower was optimally designed and its synthetically property was used as the object function.
CFD计算的结果预测了密封的动力特性以及密封结构参数对转子动力学特性的影响，可以指导密封的设计和压缩机改造，综合考虑性能和制造成本，实现优化设计。
The results of CFD simulation predicted the dynamic properties of seals and the effect of their structural parameters on rotor dynamic characteristics, and guided design of more stable compressors.
本文针对器件中温度场特性在器件性能优化方面的重要性，根据热传导理论，建立了器件的热学模型。
In this paper, based on the theory of heat transferring, an thermal model of thermooptical devices is established.
深入研究其传动特性对于优化设计参数、进一步改善该传动装置的性能等具有十分重要的意义。
Therefore, further researches on it's transmission characters deserve great significance to optimizing the design parameters and further improving the device's capabilities.
仿真实验结果验证了理论分析及参数优化解的有效性，以及多参数优化误比特性能的优越性。
Simulation results demonstrate the validity of theoretical analysis and the multi-parameter optimal solution is proved, and the superiority of BER performance is also proved.
仿真实验结果验证了理论分析及参数优化解的有效性，以及多参数优化误比特性能的优越性。
Simulation results demonstrate the validity of theoretical analysis and the multi-parameter optimal solution is proved, and the superiority of BER performance is also proved.
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