Automatic Tuning Saxophone Mouthpiece

Saxophone is a musical instrument that tends to be out of tune. I have invented an automatic tuning saxophone mouthpiece that can help saxophonists play in tune by correcting their notes' frequencies in real time during performances using a stepper motor.

Flow analysis within the well dock of an LPD

The Landing Platform Dock vessel is mainly designed to support amphibious operations in which landing operations play an important role. For operating landing craft the vessel has a well dock at the stern, designed to station several landing craft. Landing operations are restricted by the motions of the Landing Platform Dock vessel and by the...

Improving the Performance of Object Counting Using Training Images in the Frequency Domain

Convolutional Neural Networks (CNNs) have made significant strides in the field of image processing over the last decade. Different approaches have been taken and improvements have been suggested. This paper looks at a newer novelty to neural networks for image counting, which is based on single-pixel center localization instead of the...

Using frequency information to improve accuracy of object detectors

This research paper analyses the effect that using frequency information can have on object detectors. The latter are complex networks that learn information about objects from images and are then able to predict the location of these objects in new, unseen images. There are, however, certain datasets that are hard to learn on, partly because...

GPU Acceleration of the PWTD Algorithm for application in High-Frequency Communication and Fotonics

When creating electronic devices, it is essential to model what happens when an electromagnetic field hits the device and it scatters. Conventionally, this can be modelled using the Marching-on-in-Time algorithm. This can become computationally expensive for complex systems. To speed up the algorithm, the Plane-Wave Time-Domain algorithm is...

Analysis of short-to-long term heat flow in GSHP systems based on heat pump power

This paper presents a semi-analytical model based on the spectral element method for three-dimensional, short-to-long term heat flow in multiple borehole, multilayer ground source heat pump systems. The model is distinguished by its computational technique for expressing the input signal at the boundary of the borehole heat exchanger, giving...

Noise Modelling and Reduction of Permanet Magnet Motor in EV

This paper aimes to present noise reduction methodology considering switching effect. For noise analysis, Nissan LEAF motor is benchmarked and the motor is simulated in the software 'COMSOL'. <br/>Based on the result, hybrid method is proposed for noise modelling and its accuracy is validated from numerical simulation. Afterwards, noise...

Eigendecomposition-Based Partial FFT Demodulation for Differential OFDM in Underwater Acoustic Communications

Differential orthogonal frequency division multiplexing (OFDM) is practically attractive for underwater acoustic communications since it has the potential to obviate channel estimation. However, similar to coherent OFDM, it may suffer from severe inter-carrier interference over time-varying channels. To alleviate the induced performance...

Online Computational Imaging Reconstruction

In optical imaging, image quality is not only determined by the system itself but also by the media in which light traverse. Differences in the refraction index of the media encountered by a light wavefront produces phase aberrations which distort the image received from the original object. Currently, there are two main approaches for solving...

A spectral model for heat transfer with friction heat gain in geothermal borehole heat exchangers

This paper introduces a semi-analytical model for the simulation of transient heat transfer with friction heat gain in a single U-tube geothermal borehole heat exchanger subjected to an arbitrary heat flux signal. The friction effect appears as a nonhomogeneous term in the governing equations, which constitutes a set of coupled partial...

A spectral model for transient heat flow in a double U-tube geothermal heat pump system

This paper introduces a semi-analytical model based on the spectral analysis method for the simulation of transient conductive-convective heat flow in an axisymmetric shallow geothermal system consisting of a double U-tube borehole heat exchanger embedded in a soil mass. The proposed model combines the exactness of the analytical methods with...

Implementeren van een versnelling van de CONTACT-programmatuur met behulp van de Graphics Processing Unit

Het versnellen van CONTACT door het implementeren van Fast Fourier Transformaties op de GPU met de CUDA en de cuFFT bibliotheek. Met daarna onderzoek over wat de versnelling van de FFTs kan zijn.

Reordering DRAM Requests for Improved Bandwidth Utilization

The performance gap between processors and memory has grown larger and larger in the last years. With the emergence of the multicores this problem is additionally accelerated. Stalling row changes in the DRAM increase this gap even more, because the maximum theoretical bandwidth cannot be reached. The solution that is proposed in this thesis is...

Accelerating Computational Electromagnetic Diffraction Model on Programmable Graphics Processors

This thesis is done in the framework of wafer metrology to accelerate an electromagnetic diffraction model (EDM), which is used to measure the profile on a wafer, on programmable graphics processors (GPU). The main focus of this thesis is to investigate the suitability of EDM to GPU architectures. This study contributes with statistical data and...

ASIC FFT processor for MB-OFDM UWB system

The physical layer (PHY) standard of Multi-band Orthogonal Frequency Division Multiplexing (MB-OFDM) Ultra Wideband (UWB) system was defined by ECMA International. In this standard, the data sampling rate from the analog-to-digital converter to the physical layer is up to 528 Msample/s. Therefore, it is a challenge to realize the physical layer...

Analysis of the dynamic response of layered, elastic media by means of the Fast Fourier Transform

A straightforward method is presented to calculate the three-dimensional response of layered, elastic half-spaces to a dynamic surface loading. The derivation of the method is performed in the wavenumber-frequency domain. Space-frequency domain results are subsequently obtained through the application of the Fast Fourier Transform. The results...

FFT-operatie vervangt Costas-lus in een GPS-ontvanger

Van het ontvangen GPS-signaal moet na translatie naar een lagere draaggolffrequentie en despreading de draaggolffrequentie, waarin een onbekende Dopplerverschuiving, worden bepaald. In dit verslag wordt aangegeven hoe met behulp van een FFT-operatie deze draaggolffrequentie bepaald kan worden. Vervolgens wordt besproken aan welke voorwaarden de...