Engineering Commons^™

Comments On A Proposed Change For Eurodocsis Specifications, Ron D. Katznelson

Ron D. Katznelson

This submission provides support and explanations to the recommendation that specifications adopted for European applications of CableLabs’® Downstream RF Interface specifications (“DRFI”) should be maintained in accordance with the existing North American DRFI. It contains responses to a proposed changes offered by European proponents. This note addresses the in-channel (Active Output Channel) return loss requirements and the ‘Other Channels’ spurious and noise requirements.

Generalized Neuron Based Pss And Adaptive Pss, D. K. Chaturvedi, O. P. Malik

D. K. Chaturvedi Dr.

Artificial neural networks can be used as intelligent controllers to control non-linear, dynamic systems through learning, which can easily accommodate the non-linearities and time dependencies. However, they require large training time and large number of neurons to deal with complex problems. Taking benefit of the characteristics of a Generalized Neuron that requires much smaller training data and shorter training time, a Generalized Neuron-Based Power System Stabilizer (GNPSS) and an adaptive version of the same have been developed. The objective of this paper is to compare the performance of the GNPSS with that of an adaptive version, the weights of which …

Filtration And Enhancement Of Environmental Characteristics Extracted From Sar Imagery Using Dynamic Kalman Technique, Ivan E. Villalon-Turrubiates

Iván Esteban Villalón Turrubiates

In this study, we propose a new computational paradigm based on the use of the Kalman filtering technique adjusted to reconstruct the dynamic behavior of the physical and electrical characteristics of different environmental monitoring data provided via reconstructive SAR imagery. As a matter of particular study we develop and report the Kalman filter-based algorithm for high-resolution filtration of the dynamic behavior of the hydrological indexes of the particular real-world SAR images of the test remotely sensed scenes. The simulation results verify the efficiency of the proposed approach.

Incorporation Of Self-Commutating Csc Transmission In Power System Load-Flow, Lasantha B. Perera, Y. H. Liu, N. R. Watson, J. Arrillaga

Lasantha Bernard Perera

This paper presents a method which incorporates self-commutated CSC transmission directly in a fast decoupled Newton-Raphson a.c. load flow. The d.c. equations are presented in a per unit form that is compatible with the per unit a.c. equations. A sequential method of solution is adopted in solving the load flow equations. The a.c. system equations are solved with the d.c. system modelled simply as a real and reactive power injection at the terminal busbar and for a d.c. solution, the a.c. system is modelled simply as a constant voltage at the converter a.c. terminal busbar. Further the new load flow …

Design Of A Reliable Remote Surface Detector Based On Ultrasonic Pulse-Transit Technique To Detect Uneven & Non-Smooth Porous Snow Surfaces, Raman Attri

Raman K. Attri

This paper discusses design control techniques used to design ultrasonic pulse echo method based remote surface detector to detect objects with porous, un-even, irregular surfaces like snow. For such surfaces there is ample possibility of scatter of reflected beam in multiple directions, absorption of ultrasonic energy within the pores and reflected energy too feeble to detect. In some cases the reflected beam may altogether miss the receiver resulting in no surface detection at all. Scatter and penetration of ultrasonic energy at such irregular porous uneven surfaces poses great difficulties in designing a reliable Remote Surface detector. In this paper, we …

Design Of Stable Narrow Band-Pass Filter Using Multi-Stage Biquad Topology, Raman Attri

Raman K. Attri

Band pass filtering techniques have been a challenging task due to requirement of keeping Quality factor, gain and mid-frequency of the filter independent of each other. Other most important aspect is keeping the filter stable, keeping mid-frequency immune to circuit component tolerances and to achieve the mid-frequency at the accurate value. The Biquad family of topologies are typically used for a stabilized filtering application, however the design requirements on Biquad topology for low frequency application is still a challenge. The requirements become more stringent for bandwidth curve, roll-off curve and preciseness of frequency filtering as we move down to low …

Practical Design Evaluation Of Extremely Narrow Band-Pass Filter Topologies, Raman K. Attri

Raman K. Attri

Narrow Band pass filtering techniques have been a challenging task since the inception of audio and telecommunication applications. The challenge involves keeping Quality factor, gain and mid-frequency of the filter independent of each other. Other most important aspect is keeping the filter stable, keeping mid-frequency immune to circuit component tolerances and to achieve the mid-frequency at the accurate value. The requirements turns more stringent when working with low frequency Narrow band-pass filters where the shift in few Hz would cause great frequency errors. The selection of right topology for best performance is the key top successful design. This paper objectively …

Evaluation Of Single Op-Amp Topologies For Extremely Narrow Band-Pass Filter Design, Raman Attri

Raman K. Attri

Narrow Band pass filtering techniques have been a challenging task since the inception of audio and telecommunication applications. The challenge involves keeping Quality factor, gain and mid-frequency of the filter independent of each other. Other most important aspect is keeping the filter stable, keeping mid-frequency immune to circuit component tolerances and to achieve the mid-frequency at the accurate value. The requirements turns more stringent when working with low frequency Narrow band-pass filters where even the shift in few Hz would cause great frequency errors. The selection of right topology for best performance is the key to successful design. This paper …

"Un Modèle Stochastique De Dispatching Qui Considère Un Marché D’Émissions Nox Et Les Pertes De Transport : Résultats Pratiques", Fabricio I. Salgado, R. López, E. López, H. Rudnick, A. Razek

Fabricio I. Salgado MSc.

Cet article propose et évalue un modèle de coordination et d’exploitation thermoélectrique. La coordination multi-horaire de dispatching de charge est réalisée par un POOLCO (POOL Coordination – Centre de Dispatching Economique de Charge) et inclue un EATS (Emission Allowance Trading System – Système de Commercialisation d’Emissions) pour les NOx. L’indisponibilité de la génération ainsi que la variation de la demande horaire sont considérés. Le problème stochastique est évalué par la voie de la simulation de Monte-Carlo non séquentielle. Le modèle considère la modélisation du système de transmission et le calcul des pertes sous un modèle DC de répartition des puissances. …

Simulation Study Of The Unified Bayesian-Regularization Technique For Enhanced Radar Imaging, Yuriy V. Shkvarko, Ivan E. Villalon-Turrubiates

Iván Esteban Villalón Turrubiates

In this paper, we intend to present the results of extended simulation study of the family of the radar image (RI) formation algorithms that employ the recently developed and investigated fused Bayesian-regularization (FBR) paradigm for high-resolution reconstruction of the spatial spectrum pattern (SSP) of the wavefield sources distributed in the remotely sensed environment. The FBR methodology is based on the aggregation of the Bayesian minimum risk statistical optimal estimation strategy with the descriptive weighted constrained least squares optimization technique that involves the non trivial a priori information on the desired properties of the SSP to be reconstructed from the actually …

Dynamic Model Of Hiv/Aids Population Of Agra Region, D. K. Chaturvedi

D. K. Chaturvedi Dr.

The Human Immunodeficiency Virus / Acquired Immunodeficiency syndrome (HIV/AIDS) is spreading rapidly in all regions of the world. But in India it is only 20 years old. Within this short period it has emerged as one of the most serious public health problems in the country, which greatly affect the socio-economical growth. The HIV problem is very complex and ill defined from the modeling point of view. Keeping in the view the complexities of the HIV infection and its transmission, it is difficult to make exact estimates of HIV prevalence. It is more so in the Indian context, with its …

Non-Contact Detection Techniques And Technologies For Detection Of Objects In Air, Under-Ground And Under-Water, Raman Attri

Raman K. Attri

In this white paper, we will present review and compilation of various object detection techniques currently available in different scenarios and situations. Automatic Object detection in the air, beneath other materials, under water and under the earth surface as well as over the surface is one of the advanced sciences employing many principles of multiple engineering domains together. “See-through” methods – seeing beyond the visible objects, has been inherent desire of human being since the practice of science. Not only this, a craving to detect the objects without directly “seeing upon” them with naked eyes calls upon some automatic procedures …

Large It Project Implementation - A Police Application Perspective, Venkateswar P. Oruganti

Venkateswar P Oruganti FIETE FIE PMP

A comprehensive Police Information System has the paramount objective to computerize activities related to Crime control, administrative support functions and interactions with other co-functionary government departments such as Judiciary, Road Transport Authority, Prisons, Hospitals, immigration etc., apart from providing timely and accurate information to citizens.

Effective implementation of such system depends primarily on the environment, processes, infrastructure, and continuity measures. The implementation of such systems will bring in an Organizational Transformation bridging the digital divide in a department in particular and in the government in general.

Seven Steps For Effective Implementation Of Police Information Systems, Venkateswar P. Oruganti

Venkateswar P Oruganti FIETE FIE PMP

Police Information Systems implementation from concept to completion is a unique experience. This presentation highlights typical of the practices and seven steps for effective implementation of Police Information Systems. This presentation is used for a webinar during the 2nd Anniversary of Oracle eGov COE at New Delhi in July 2005

The Case Against A Proposed Relaxation Of Out-Of-Band Noise And Spurious Specifications For Docsis Edge-Qam Rf Devices, Ron D. Katznelson

Ron D. Katznelson

This submission supported Broadband Innovations' (BI) opposition to relaxing the Out-of-Band Noise and Spurious specifications in QAM downstream transmission of Edge-QAM (“EQAM”) devices. The specifications relaxation was proposed by a consortium of equipment vendors who called it the Joint Proposal for Self-Aggregate noise and spurious (“JPSA”). This note explains why the adoption of the JPSA would strip CATV systems from having sufficient operational noise and interference margins.

Post submission note: Despite the overwhelming majority of the Working Group's acceptance and recommendation of the JPSA, CableLabs' Technical Board voted to accept BI's proposal and to reject the JPSA.

Introduction To Particle Filtering, Sanjay A. Patil

Sanjay A. Patil

No abstract provided.

Development Of Neural Networks Module For Fault Identification In Asynchronous Machine Using Various Types Of Reference Signals, Djalaleddine Khodja, Boukhemis Chetate

Boukhemis Chetate

No abstract provided.

Pulse Multiplication In The Self-Commutating Parallel Converter By Means Of Multi-Level Dc Voltage Reinjection, Lasantha Bernard Perera

Lasantha Bernard Perera

A multi-level dc voltage reinjection concept is described that multiplies the pulse number of the twelve-pulse dual parallel converter. The ideal reinjection waveform for complete elimination of the harmonic content is first derived, and a practical approximation is proposed which converts the standard dual converter into a sixty-pulse scheme, thus meeting the strictest harmonic standards without the assistance of filters or Pulse Width Modulation.

A Generalized Neuron Based Adaptive Power System Stabilizer For Multimachine Environment, D. K. Chaturvedi, O. P. Malik

D. K. Chaturvedi Dr.

Artificial neural networks can be used as intelligent controllers to control nonlinear, dynamic systems through learning, which can easily accommodate the nonlinearities and time dependencies. Taking advantage of the characteristics of a generalized neuron (GN), that requires much smaller training data and shorter training time, a GN-based adaptive power system stabilizer (GNAPSS) is proposed. It consists of a GN as an identifier, which predicts the plant dynamics one step ahead, and a GN as a controller to damp low frequency oscillations. Results of studies with a GN-based PSS on a five-machine power system show that it can provide good damping …

Catv Modulator Return Loss Effects On Headend Combining Isolation, Ron D. Katznelson

Ron D. Katznelson

This note addresses the impact of broadband return loss of frequency agile modulators when combined through headend combining networks. In particular, the effect of less-than-ideal output return loss values are examined and it is shown that even under the worst case conditions, a broadband return loss of 10 dB produces only small reductions in isolation that still permit cable operators to meet their headend combining specifications.

Robust Stability Analysis Of Large Power Systems Using The Structured Singular Value Theory, R. Castellanos, A. R. Messina, H. Sarmiento

A. R. Messina

This paper examines the application of structured singular value (SSV) theory to analyse robust stability of complex power systems with respect to a set of structured uncertainties. Based on SSV theory and the frequency sweep method, techniques for robust analysis of largescale power systems are developed. The main interest is focused on determining robust stability for varying operating conditions and uncertainties in the structure of the power system. The applicability of the proposed techniques is verified through simulation studies on a large-scale power system. In particular, results for the system are considered for a wide range of uncertainties of operating …

Study Of Physical Effects As A Performance Parameter In Optical Burst Switched Networks, Ioannis Karamitsos, Anna Tzanakaki, Ioannis Tomkos

John P. Karamitsos

No abstract provided.

Analytical Model For Optical Burst Switching (Obs) Networks With Linear Transmission Impairments, Ioannis Karamitsos

John P. Karamitsos

No abstract provided.

Paramètres Capacitifs Et Surtensions Dans L’Enroulement D’Un Moteur Asynchrone, Alimenté Par Un Convertisseur Mli, M.T. Belassel, Victor Bespalov, Boukhemis Chetate

Boukhemis Chetate

Dans ce travail nous présentons une méthode de calcul des paramètres capacitifs et des surtensions dans un enroulement d’un moteur asynchrone à cage alimenté par un convertisseur M.L.I La détermination des paramètres capacitifs est l’une des étapes les plus importantes dans le processus de modélisation mathématique des processus ondulatoires dans les moteurs asynchrones (MA), de ces paramètres dépend ce qu’on appelle la distribution initiale des tensions dans les capacités de l’enroulement. La machine étudiée dans ce travail possède un enroulement concentrique à deux couches avec une distribution anarchique des conducteurs circulaires ronds dans l’encoche, elle est fabriquée par l’entreprise ELECTRO-INDUSTRIES …