A XGBoost Based Wireless Interference Relation Mining and Performance Prediction Method

2021 ◽  
Author(s):  
Han Liu ◽  
Tao Peng ◽  
Yichen Guo ◽  
Yachen Wang ◽  
Gonglong Chen ◽  
...  
Keyword(s):  
Performance Prediction ◽  
Prediction Method ◽  
Wireless Interference ◽  
And Performance ◽  
Relation Mining

scholarly journals Performance Prediction of Cross-Flow Fans Using Mean Streamline Analysis

2005 ◽  
Vol 2005 (2) ◽  
pp. 112-116 ◽  
Author(s):  
Jae-Won Kim ◽  
Eun Young Ahn ◽  
Hyoung Woo Oh
Keyword(s):  
Performance Prediction ◽  
Cross Flow ◽  
Prediction Method ◽  
General Purpose ◽  
Operating Conditions ◽  
Performance Predictions ◽  
Performance Curves ◽  
Mean Streamline Analysis ◽  
And Performance ◽  
Cross Flow Fan

This paper presents the mean streamline analysis using the empirical loss correlations for performance prediction of cross-flow fans. Comparison of overall performance predictions with test data of a cross-flow fan system with a simplified vortex wall scroll casing and with the published experimental characteristics for a cross-flow fan has been carried out to demonstrate the accuracy of the proposed method. Predicted performance curves by the present mean streamline analysis agree well with experimental data for two different cross-flow fans over the normal operating conditions. The prediction method presented herein can be used efficiently as a tool for the preliminary design and performance analysis of general-purpose cross-flow fans.

Sizing and Performance-Prediction Method for Rotary-Wing Ejector Nozzles

2009 ◽  
Vol 46 (3) ◽  
pp. 951-961 ◽  
Author(s):  
Alex M. Moodie ◽  
Daniel P. Schrage ◽  
Lakshmi N. Sankar ◽  
Mark H. Waters
Keyword(s):  
Performance Prediction ◽  
Prediction Method ◽  
And Performance ◽  
Rotary Wing

scholarly journals A design and performance prediction method for small horizontal axis wind turbines and its application

AIMS Energy ◽  
2021 ◽  
Vol 9 (5) ◽  
pp. 1043-1066
Author(s):  
Stephen K. Musau ◽  
◽  
Kathrin Stahl ◽  
Kevin Volkmer ◽  
Nicholas Kaufmann ◽  
...  
Keyword(s):  
Wind Speed ◽  
Wind Turbines ◽  
Performance Prediction ◽  
Prediction Method ◽  
Drive Train ◽  
Performance Characteristics ◽  
Speed Ratio ◽  
Battery Charger ◽  
Tip Speed Ratio ◽  
And Performance

<abstract> <p>The paper deals with small wind turbines for grid-independent or small smart grid wind turbine systems. Not all small turbine manufacturers worldwide have access to the engineering capacity for designing an efficient turbine. The objective of this work is to provide an easy-to-handle integrated design and performance prediction method for wind turbines and to show exemplary applications.</p> <p>The underlying model for the design and performance prediction method is based on an advanced version of the well-established blade-element-momentum theory, encoded in MATLAB™. Results are (i) the full geometry of the aerodynamically profiled and twisted blades which are designed to yield maximum power output at a given wind speed and (ii) the non-dimensional performance characteristics of the turbine in terms of power, torque and thrust coefficient as a function of tip speed ratio. The non-dimensional performance characteristics are the basis for the dimensional characteristics and the synthesis of the rotor to the electric generator with its load.</p> <p>Two parametric studies illustrate typical outcomes of the design and performance prediction method: A variation of the design tip speed ratio and a variation of the number of blades. The predicted impact of those parameters on the non-dimensional performance characteristics agrees well with common knowledge and experience.</p> <p>Eventually, an interplay of various designed turbine rotors and the given drive train/battery charger is simulated. Criterions for selection of the rotor are the annual energy output, the rotor speed at design wind speed as well as high winds, and the axial thrust exerted on the rotor by the wind. The complete rotor/drive train//battery charger assembly is tested successfully in the University of Siegen wind tunnel.</p> </abstract>

Research on the Natural Frequency Prediction Method for Ring Tension Truss Deployable Antenna

2011 ◽  
Vol 105-107 ◽  
pp. 2200-2203
Author(s):  
Xing Xing He ◽  
Ying Liao ◽  
Ya Jun Yang
Keyword(s):  
Natural Frequency ◽  
Performance Prediction ◽  
Prediction Method ◽  
Similarity Criteria ◽  
Scale Model ◽  
Structural Parameter ◽  
Space Antennas ◽  
Working Performance ◽  
And Performance ◽  
Prediction Approach

It is nearly impossible to carry out prototype experiments of large deployable space antennas because of their large dimensions. To solve this problem, a performance prediction approach is proposed in this paper. The prototype’s working performance is predicted by the scale model of the large deployable antenna. Based on this method, the natural frequency of the ring tension truss deployable antenna working in space is studied. The effect of the structural parameter distortion is taken into consideration by similarity criteria, and a similarity experimental formula of structural natural frequency is obtained. Four finite element models are established to validate the correction of the prediction method. The simulation results show that it’s valid for the prediction method to analyze the prototype in space, and it can be applied to promote the design, and performance prediction of the large deployable antennas.

Effects of Wall Shape on Flow Regimes and Performance in Straight, Two-Dimensional Diffusers

1967 ◽  
Vol 89 (1) ◽  
pp. 151-159 ◽  
Author(s):  
J. J. Carlson ◽  
J. P. Johnston ◽  
C. J. Sagi
Keyword(s):  
Flow Regime ◽  
Performance Prediction ◽  
Prediction Method ◽  
Flow Regimes ◽  
Two Dimensional ◽  
Simple Class ◽  
And Performance

Three diffuser sets (N/W1, held constant in each set) were built and tested for performance and flow regime over a range of total area ratios, AR, which yielded unstalled and stalled flows. At each AR and N/W1, a simple class of convex-inward (trumpet-shaped), straight, and convex-outward (bell-shaped) wall shapes were tested. It is concluded that there is little advantage to be gained by contouring the walls of two-dimensional diffusers. A corollary result shows that the performance prediction method of reference [1] gives good results for unstalled diffusers.

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