Radix-4 DIT FFT implementation using Fused Floating-Point Arithmetic Unit
The paper presents a hardware implementation of radix-4 DIT FFT butterfly-unit using Fused Floating-point Arithmetic Unit (FFAU) technique. The proposed FFAU is more efficient in area and delay than the primitive floating-point arithmetic operation. The radix-4 DIT FFT using FFAU is designed and synthesized in cadence using 45nm technology. The non pipelined conventional architecture of FFT operates in 6Mhz whereas proposed FFT architecture operates on 10 Mhz frequency. The outcome area is 46% efficient than the conventional FFT architecture. The 16 point DIT FFT is also implemented on the same proposed FFAU, to ensure the computation speed.
Published by: Rajeev Gowda B R, Dr. A.B Kalpana
Author: Rajeev Gowda B R
Paper ID: V4I4-1476
Paper Status: published
Published: August 13, 2018
Application of tuned mass dampers in torsionally coupled buildings
High rise building structures are both a necessity and a matter of sophistication and pride for structural engineers. Forces of nature in the form of earthquakes and cyclones starts playing brutal games with the structures, higher the structure goes, and higher it attracts the forces and wrath of nature in the form of seismic force. Seismic force, predominantly being an inertia force depends on the mass of the structure causing requirement of heavier sections as mass increases. And these heavy sections further increase the mass of the structure leading to even heavier seismic forces. Structural designers are met with the huge challenge to balance these contradictory physical phenomena to make the structure safe. The structure no more can afford to be rigid. In recent year, it is common practice to install vibration control devices on structures to mitigate their dynamic response caused by different factors, mainly due to wind and earthquake excitations. Among these devices, tuned mass dampers (TMD) have been widely used in building to mitigate dynamic responses of buildings. As the structural complexity of buildings increase, their response to such excitations may become more prone to torsional motion. Torsional motion induced by such excitations can be suppressed by utilizing TMDs. The performance of TMD at different positions are important for torsionally coupled structures. In this study, the performance of bi-directional tuned mass dampers (BTMD) in reducing the torsional response of a building under bi-directional earthquake excitations was studied and evaluated.
Published by: Zartab Alam, Aamir Baig, Faiyaz Azam
Author: Zartab Alam
Paper ID: V4I4-1464
Paper Status: published
Published: August 13, 2018
ESTOI for predicting the Intelligibility of speech
Intelligibility listening tests are necessary during development and evaluation of speech processing algorithms, despite the fact that they are expensive and time-consuming.The proposed scheme uses a monaural intelligibility prediction algorithm, which has the potential of replacing some of the listening tests. The proposed algorithm shows similarities to the Short-Time Objective Intelligibility (STOI) algorithm but works for a larger range of input signals. In contrast to STOI, Extended STOI (ESTOI) does not assume mutual independence between frequency bands. ESTOI also incorporates spectral correlation by comparing complete 400-ms length spectrograms of the noisy/processed speech and the clean speech signals. As a consequence, ESTOI is also able to accurately predict the intelligibility of speech contaminated by temporally highly modulated noise sources in addition to noisy signals processed with time-frequency weighting. We show that ESTOI can be interpreted in terms of an orthogonal decomposition of short-time spectrograms into intelligibility subspaces, i.e., a ranking of spectrogram features according to their importance to intelligibility.
Published by: Nitesh Kumar, Karunavathi R K
Author: Nitesh Kumar
Paper ID: V4I4-1467
Paper Status: published
Published: August 13, 2018
Seismic analysis of box girder bridge
Now a days the box girder bridge is frequently used bridge system in worldwide. Actually, the box girder bridge is commonly used for the long span for the ignoring the heavy weight as compare to the other bridge girder system. CSiBridge v 20.0.0 is used for analyzing dynamic response of box girder bridge. The main objective of this study is analyzing and investigating seismic performance of multi-span with up to five spans 92-meter-long box girder bridge. The seismic performance of box girder bridge is very complex and performance depends on the peak ground motion and, ground motion acceleration. It is done by non-linear time history analysis method. In this study, the three-dimension model and the data of Kobe earthquake are used for dynamic characteristics and showing the maximum response of box girder deck. Response results indicate in terms of deformed shape, absolute acceleration, base shear, base reaction, total energy component and displacement. Thus, the paper suggests that the construction of bridge based on time history analysis will sustain the earthquake up to 6.9 magnitude.
Published by: Firoz Ahmad, M. A. Baig
Author: Firoz Ahmad
Paper ID: V4I4-1469
Paper Status: published
Published: August 13, 2018
Survey of various transforms to discover optic disc from retina
Early perception and confinement of optic disc are one of the crucial steps to detect the various diseases like Diabetic Retinopathy, Glaucoma and many other. Detection of optic disc in ac exact way is very important in diabetic retinopathy wherein the retina the weak vessels start developing. Each of the vessels in the retina arises from the optic disc and each of them pursue the same directional pattern which is parabolic in nature. Normally Optic disc is circular in shape and it is set down 3 to 4mm to the higher part of the fovea. Diabetic Retinopathy is a disease which affects much of people having a high blood sugar level which will harm the blood vessels present in the retina. Early diagnosis of diabetic retinopathy is very important for which detection of Optic disc plays a very important role. With the help of various transforms like Discrete Wavelet Transform (DWT), Krisch Transform, Bottom Hat Transform can be done in a proper manner. By using DRIVE datasets which is publicly available the suggested method is being evaluated.
Published by: Priyanka Ravi Pujari, K. T. Jadhao
Author: Priyanka Ravi Pujari
Paper ID: V4I4-1457
Paper Status: published
Published: August 13, 2018
Medical image enhancement using hybrid fusion techniques
Medical image fusion techniques are extensively used to aid medical diagnosis by combining features of two or more images of various modalities such as Computed Tomography (CT), Magnetic Resonance Image (MRI), and positron emission tomography (PET) into a single output image that contains salient features from all inputs. This paper proposes a hybrid fusion algorithm and is applied on a CT and MRI images. The largest Eigenvalue of the covariance matrices of each image are used to obtain weights for next stage image by Principal Component Analysis (PCA) and different frequency components of the input image are separated by Discrete Cosine Transform (DCT), noise in output images from first two stages. Performance evaluation of CT-MRI image fusion with the hybrid algorithm by Discrete Wavelet Transform (DWT) improves the image quality compared to established methods. Overall, the non-linear fusion rule holds strong potential to help improve image fusion applications in medicine and in other fields.
Published by: Kandi Sravanthi
Author: Kandi Sravanthi
Paper ID: V4I4-1441
Paper Status: published
Published: August 10, 2018
