Acoustics of Ducts and Mufflers With Application to Exhaust by M. L. Munjal

By M. L. Munjal

A whole presentation and research of the foremost themes in sound suppression and noise keep an eye on for the research and layout of acoustical mufflers, air-con and air flow duct paintings. either basics and the newest expertise are mentioned, with an emphasis on functions. offers with reactive mufflers, dissipative silencers, the frequency-domain method, and the time-domain strategy.

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098 The performances of the three implementations are comparatively respectable in the verification task and thus indicate the driver recognition system 's ability to deter most unauthorized access. Despite a reasonably good performance, this may not be sufficient especially for strict access control or security systems since any false acceptance will result in serious consequences. Despite the ability of the GMM-based features to model driving behavior to a high degree of accuracy, moderate verification results suggest that there is slight similarity in driving behaviors among drivers in terms of the way they apply pressure to the brake and accelerator pedals which requires more extensive investigation and research.

Generally, two types of data files were prepared as the source for the networks: training data set and the test data. Identification is performed by presenting the testing data file(s) to the driver recognition system which is then presented to all the corresponding network(s) of all drivers. The networks' outputs are linearly combined for each driver and the driver with the highest combined network output is identified as the driver. For verification, the testing data file is fed to the asserted driver network and a linearly combined output of the network is compared with a decision threshold.

To solve the fuzzy system, we use the MinIMax inference and the center of gravity for the defuzzificat ion step. Non visible area Figure 4-6. Non-visible area. Fshin(Shift) 1 Null Fshin(Shift) Low . 0\ . Slow Medium . . /\ :; , 2 2 0 2 8 0 3 5 0 4 0 0 Fdirection(Direction) Very 1 Null Low . Low Medium Hard ·! ~\ · · ···· · · 7~ I I • ,/ / Max •• . / / o 50 5 100 60 170 190 110 Figure 4-7. Fuzzy input and output. Direction Speed Chapter 4 44 Table 4-J. FuzzyAssociative Matrix (FAM). Low Medium Max Null Low Max Null Hard Low Hard Hard Slow Null Medium Null Very Low Medium Medium Low Low Fast Null Very Low AND Null 5.

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