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    An airfoil shape design method that couples viscous flow analysis, a complex method and parallel calculation is described in this paper. The method is applied to search an airfoil geometry with improved aerodynamic performance at single or multiple design-point while the specified design constraints being satisfied.
    本文将流场分析程序、复合形优化方法和并行计算耦合起来,发展了一种工程实用的翼型优化设计方法,用以提高翼型在单个或多个设计点、多种约束条件下的气动性能。
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    Experimental research shows that the proposed method can be successfully used to localize single or multiple damages on the three dimension truss structure.
    空间桁架结构破损诊断的实验研究表明 ,该方法能成功地诊断出结构单个或多个破损的位置。
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    The design results indicate that RSM can be successfully applied to improve aerodynamic performance of a airfoil at single or multiple design-points, subject to specified constraints by less flow field computation cost, and will be very attractive for practical use because of its high design quality.
    设计结果表明该方法只需通过较少流场计算就能对翼型的单个或多个设计点、在多约束条件下进行气动优化设计,设计质量较高,有较大的工程应用价值。
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    Results illustrate that the presented approach can simply and to effec tively locate and quantify damages in the structure.
    结果表明,该方法能简便有效地同时诊断结构中的单个或多个破坏情况。
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Their effect on the studied syntheses was dose-dependent: single or multiple long-term administration of high antioxidant doses inhibited synthesis of dNTPs, DNA, and proteins.
      
The change from vertical to longitudinal polarization by single or multiple switching of the longitudinal field for a certain time interval is considered.
      
In this sample, the lifetime prevalence of panic was 8.6%, and well over half of these had single or multiple additional psychiatric diagnoses.
      
Fifty-six patients suffered from single or multiple organ dysfunction syndrome, 36 patients from septic complications; 27 multiple trauma patients died.
      
Single or multiple coils were implanted successfully in 114 cases, a Rashind double umbrella in 35 patients, and an Amplatzer duct occluder in 16 patients.
      
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A new method is proposed to detect the location and magnitude of damages in a structure by using incomplete and noisy measured modal data. The complete procedure consists of three parts:expansion of the measured mode shapes; localization of the damage domain using a concept of Local Frequency Change Ratio; damage quantification by a iterative process. For illustrating the effectiveness of this method, several damage cases in the GARTEUR structure are investigated. Results illustrate that the presented approach...

A new method is proposed to detect the location and magnitude of damages in a structure by using incomplete and noisy measured modal data. The complete procedure consists of three parts:expansion of the measured mode shapes; localization of the damage domain using a concept of Local Frequency Change Ratio; damage quantification by a iterative process. For illustrating the effectiveness of this method, several damage cases in the GARTEUR structure are investigated. Results illustrate that the presented approach can simply and to effec tively locate and quantify damages in the structure.

提出了一种用有噪声影响的不完整振型和频率来检测结构破损的方法。先由局部频率变化率的概念诊断出结构的破损位置,然后用灵敏度分析法确定破损的大小。整个过程分测试振型的扩充、结构破损的定位和破损大小的确定三部分。文中用GARTEUR结构对多种破坏情况进行了仿真研究。结果表明,该方法能简便有效地同时诊断结构中的单个或多个破坏情况。

A method of optimizing sensor placement in the structural dynamic test and localizing structural damage from limited sensor information in a structure is presented in this paper. The sensor placements are optimized according to the ability of collecting structural damage information for each degree of freedom (DOF) of the structure. Only a limited number of structural DOF including plentiful damage information are instrumented. Incomplete mode shapes yielded from these limited sensor placements are directly...

A method of optimizing sensor placement in the structural dynamic test and localizing structural damage from limited sensor information in a structure is presented in this paper. The sensor placements are optimized according to the ability of collecting structural damage information for each degree of freedom (DOF) of the structure. Only a limited number of structural DOF including plentiful damage information are instrumented. Incomplete mode shapes yielded from these limited sensor placements are directly used to localize structural damage so that the incompleteness of experimental mode shape to block the development of structural damage detection is solved. Experimental research shows that the proposed method can be successfully used to localize single or multiple damages on the three dimension truss structure.

提出了结构动态试验传感器测点位置的优化方法 ,发展了基于有限多个传感器测点信息的结构破损定位方法。该方法以结构各自由度的破损信息为条件 ,通过优化方法从结构的全部自由度中去掉那些所含结构破损信息很少的自由度 ,得到了有限个传感器测点的数目和位置 ,并且运用灵敏度分析和相关性分析方法 ,建立了直接利用不完整的实测模态振型诊断结构破损位置的破损定位方法 ,解决了测试振型不完整给结构破损诊断带来的困难。空间桁架结构破损诊断的实验研究表明 ,该方法能成功地诊断出结构单个或多个破损的位置。

In this paper, the optimization design of the transonic airfoil is performed by the Response Surface Methodology(RSM). The flow solver is based on Reynolds-Averaged Navier-Stokes equations. The quadratic polynomials are employed to construct RS model and the set of candidate design points is selected to satisfy D-optimality. The design results indicate that RSM can be successfully applied to improve aerodynamic performance of a airfoil at single or multiple design-points, subject to specified constraints by...

In this paper, the optimization design of the transonic airfoil is performed by the Response Surface Methodology(RSM). The flow solver is based on Reynolds-Averaged Navier-Stokes equations. The quadratic polynomials are employed to construct RS model and the set of candidate design points is selected to satisfy D-optimality. The design results indicate that RSM can be successfully applied to improve aerodynamic performance of a airfoil at single or multiple design-points, subject to specified constraints by less flow field computation cost, and will be very attractive for practical use because of its high design quality.

基于响应面方法进行了跨声速翼型的气动优化设计。流场计算采用雷诺平均N S方程。响应面模型采用二次多项式来构造,试验点的选取满足D优化准则。设计结果表明该方法只需通过较少流场计算就能对翼型的单个或多个设计点、在多约束条件下进行气动优化设计,设计质量较高,有较大的工程应用价值。

 
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