scholarly journals Difference equation approach to two-thermocouple sensor characterization in constant velocity flow environments

2005 ◽  
Vol 76 (2) ◽  
pp. 024902 ◽  
Author(s):  
P. C. Hung ◽  
G. Irwin ◽  
R. Kee ◽  
S. McLoone
Keyword(s):  
Difference Equation ◽  
Constant Velocity ◽  
Equation Approach ◽  
Velocity Flow

Even-echo rephasing and constant velocity flow

1987 ◽  
Vol 4 (5) ◽  
pp. 422-430 ◽  
Author(s):  
J. Katz ◽  
R. M. Peshock ◽  
C. R. Malloy ◽  
S. Schaefer ◽  
R. W. Parkey
Keyword(s):  
Constant Velocity ◽  
Velocity Flow

ON THE PROLONG ATTACHMENT OF LEADING EDGE VORTEX ON A FLAPPING WING

2009 ◽  
Vol 23 (03) ◽  
pp. 357-360 ◽  
Author(s):  
T. T. LIM ◽  
C. J. TEO ◽  
K. B. LUA ◽  
K. S. YEO
Keyword(s):  
Constant Velocity ◽  
Leading Edge ◽  
Flapping Wing ◽  
Constant Acceleration ◽  
Leading Edge Vortex ◽  
Velocity Flow ◽  
Edge Vortex ◽  
Per Se ◽  
Spanwise Flow ◽  
Negligible Influence

In this paper, we take a fundamental approach to investigate the effect of spanwise flow on the prolonged attachment of leading edge vortex (LEV) on a flapping wing. By imposing a constant acceleration-constant velocity flow on elliptic wings of various sweep angles and angles of attack, our experimental and numerical results show that while spanwise flow per se has negligible influence on the prolong attachment of the LEV, vortex stretching can significantly delay detachment of the LEV, even for a small spanwise flow.

scholarly journals H∞Channel Estimation for DS-CDMA Systems: A Partial Difference Equation Approach

2013 ◽  
Vol 2013 ◽  
pp. 1-8
Author(s):  
Wei Wang ◽  
Chunyan Han
Keyword(s):  
Channel Estimation ◽  
Difference Equation ◽  
Multiple Access ◽  
Multipath Fading ◽  
Channel Noise ◽  
Equation Approach ◽  
Partial Difference Equation ◽  
Partial Difference ◽  
Channel Estimator ◽  
Code Division Multiple

In the communications literature, a number of different algorithms have been proposed for channel estimation problems with the statistics of the channel noise and observation noise exactly known. In practical systems, however, the channel parameters are often estimated using training sequences which lead to the statistics of the channel noise difficult to obtain. Moreover, the received signals are corrupted not only by the ambient noises but also by multiple-access interferences, so the statistics of observation noises is also difficult to obtain. In this paper, we will investigate theH∞channel estimation problem for direct-sequence code-division multiple-access (DS-CDMA) communication systems with time-varying multipath fading channels. The channel estimator is designed by applying a partial difference equation approach together with the innovation analysis theory. This method can give a sufficient and necessary condition for the existence of anH∞channel estimator.

Potential Distribution across a String of Insulators

1974 ◽  
Vol 11 (3) ◽  
pp. 212-222 ◽  
Author(s):  
S. C. Dutta Roy
Keyword(s):  
Difference Equation ◽  
Potential Distribution ◽  
Equation Approach ◽  
Street Lighting ◽  
In Series ◽  
The Difference ◽  
Explicit Expressions

The problem of determining the potential distribution across a string of insulators is solved by using the difference equation approach. Explicit expressions for the potentials are given in series as well as closed forms, and their variations with the parameters are displayed in the form of graphs. The results are also applicable to line calculations for major street lighting schemes.

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