AUTOMATIC TEXT-INDEPENDENT SPEAKER TRACKING SYSTEM USING FEED-FORWARD NEURAL NETWORKS (FFNN)

ABSTRACT Speaker tracking is the process of following who says something in a given speech signal. In this paper, we propose a new set of robust source features for Automatic Text-Independent speaker tracking system using Feed-forward neural networks (FFNN). LP analysis is used to extract the source information from the speech signal. This source information is speaker specific. In this approach, instead of capturing the distribution of feature vectors correspond to vocal tract system of the speakers, the time varying speaker-specific source characteristics are captured using Linear Prediction (LP) residual signal of the given speech signal. MFCC features are extracted from the source speech signal, which contains prosody and speaker specific information. These source features which are extracted are proven to be robust and insensitive to channel characteristics and noise. In this paper, finally it is proved that speaker tracking system using source features with FFNN outperformed other existing methods. Keywords: LPC, MFCC, Source feature, Speaker tracking. INTRODUCTION Speech is produced from a time varying vocal tract system excited by a time varying excitation sourc

DESIGN, ANALYSIS AND FABRICATION OF CONNECTING ROD AND ITS CHARECTERIZATION WITH GRAPHITE-GRANITE PARTICLES REINFORCED A 7075 HYBRID METAL MATRIX COMPOSITES

Connecting rod is a structural member in the engine, which transfers reciprocating motion into rotary motion of crank shaft. The Connecting Rod is designed according to the specifications. After the designing, the model is subjected to certain conditions. According to the conditions we have checked the stresses acting on it and checked the failures of the model. After the analyzing the changes are done to the model if required. In the analysis a model of Connecting Rod is generated using CATIA software. The finite element model is generated using Ansys. It is applied with loads and boundary conditions.Granite powder emerges as the major waste material during cutting of granite stones which consists a major amount of AL2O3.It is generally agreed that resistance to wear of MMCs is created by reinforcement and also the wear properties are improved remarkably by introducing hard intermetallic compound into the aluminum matrix. The reinforcing materials are generally SiC, Al2O3 etc and are costly. The present research work has been undertaken with an objective to explore the use of granite powder and graphite as a reinforcing material as a low-cost option. This is due to the fact that granite alone contains all these reinforcement elements and is plentifully available. Experiments have been conducted under laboratory condition to assess the mechanical characteristics of the aluminium blast furnace slag composite under different size particle conditions. This has been possible by fabricating the samples through usual stir casting technique. To enhance the mechanical properties the surfaces of the samples were studied under optical microscope to get an idea about the effect of particulate reinforcement on the micro structure behavior of the composite. Dispersion of granite and graphite particles in aluminium matrix improves the hardness of the matrix material and also the mechanical behaviour of the composite

Electron Beam Radiation Modification on Chemical, Thermal and Crystalline Properties of Poly (L-lactic acid)

715-722The paper presents the effect of electron beam (EB) irradiation on poly (L-Lactic acid) (PLLA). The resultant physicochemical properties were investigated using Electron spin resonance spectrometer (ESR), Fourier transform infrared spectrometer (FTIR), Differential scanning calorimetry (DSC), X-ray Diffraction (XRD) and Scanning electron microscopy (SEM). The results suggest that PLLA undergoes random chain scission producing two types of free radicals ~Ċ(CH3)~ (I) and ĊH(CH3)~ (II) at room temperature. Presence of these free radicals has been confirmed by the ESR method and computer simulation studies using easyspin tool. FTIR results depict that the intensity of the absorption band 1745 cm-1 is reduced by 12% for 90 kGy dose. DSC studies indicate that both glass transition temperature (Tg) and melting temperature (Tm) of PLLA decrease following radiation dose. However melting enthalpy (ΔH) and degree of crystallinity (XC) increased initially up to 30 kGy of radiation dose followed by a decrease after 30 kGy. These results confirm the existence of two types of crystalline lamellar are present in PLLA. Measurements of XC by XRD also confirm the same aspect. The surface of PLLA is composed of micro-cracks when exposed to higher radiation doses

Towards an understating of signal transduction protein interaction networks

Protein network analysis has witnessed a number of advancements in the past for understanding molecular characteristics for important network topologies in biological systems. The signaling pathway regulates cell cycle progression and anti-apoptotic molecules. This pathway is also involved in maintaining cell survival by modulating the activity of apoptosis through RAS, P13K, AKT and BAD activities. The importance of protein-protein interactions to improve usability of the interactome by scoring and ranking interaction data for proteins in signal transduction networks is illustrated using available data and resources

Finitely generated ideals in rings of analytic functions

Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/46214/1/208_2005_Article_BF02052394.pd

Change in the Shape of a Molecule During the Formation of Hydrogen Bond

Evidence is found to show that C=O bond frequency dv=1710 of monochloacetic acid, the total S5rmmetric line dv=910 of sulphuric acid and the total symmetric lino 1060 of the nitrate ion in solution are found to decrease on depolymerisation due to heating, contrary to expectation. This goes against the assumptions usually made that the bond in question is unaffected by the presence of the other atoms in the molecules and the other molecules in the liquid. It is surmised that the molecules change their shape during the formation of a complex. The structure of the nitrate ion is pyramidal in solution at low temperature and it becomes plane on heating. This is taken to be a direct evidence for crystalline nature of hydration of ion in solution postulated by Lengyel