288
288

Jul 26, 2010
07/10

by
Armand, Sasan C.; Liao, Mei-Hwa; Morris, Ronald W

texts

#
eye 288

#
favorite 0

#
comment 0

The Space Station Freedom photovoltaic solar array blanket assembly is comprised of several layers of materials having dissimilar elastic, thermal, and mechanical properties. The operating temperature of the solar array, which ranges from -75 to 60 C, along with the material incompatibility of the blanket assembly components combine to cause an elastic-plastic stress in the weld points of the assembly. The weld points are secondary structures in nature, merely serving as electrical junctions...

Topics: CONSISTENCY, DISTRIBUTED PARAMETER SYSTEMS, SIMULATION, SYNCHRONISM, ALGORITHMS, ESTIMATES,...

300
300

Sep 20, 2010
09/10

by
NON

texts

#
eye 300

#
favorite 0

#
comment 0

A method and apparatus are provided for acoustophoresis, i.e., the separation of species via acoustic waves. An ultrasonic transducer applies an acoustic wave to one end of a sample container containing at least two species having different acoustic absorptions. The wave has a frequency tuned to or harmonized with the point of resonance of the species to be separated. This wave caused the species to be driven to an opposite end of the sample container for removal. A second ultrasonic transducer...

Topics: AEROSOLS, SIGNAL TO NOISE RATIOS, WIND VELOCITY MEASUREMENT, ACCURACY, ALGORITHMS, DESIGN ANALYSIS,...

248
248

May 30, 2011
05/11

by
Stropki, Michael A.; Cleyrat, Danial A.; Clinton, Raymond G., Jr

texts

#
eye 248

#
favorite 0

#
comment 0

Partnership is more than just coordination, stated then-Commander of the Air Force Research Laboratory (AFRL), Major General Dick Paul (USAF-Ret), at this year's National Space and Missile Materials Symposium. His comment referred to the example of the joint planning and program execution provided by the Integrated High Payoff Rocket Propulsion Technology (IHPRPT) Materials Working Group (IMWG). Most people agree that fiscal pressures imposed by shrinking budgets have made it extremely...

Topics: ALGORITHMS, INFRARED RADIATION, LOW EARTH ORBITS, SATELLITE SOUNDING, TELEVISION SYSTEMS,...

The exceptional utility and performance of the sequential, linear, unbiased, minimum variance estimator suffers severely in the presence of dynamic model errors. This problem--perhaps the greatest detriment to the so-called Kalman filter algorithm--is discussed in the light of its divergent effect upon the estimation process. A number of optimal and suboptimal modifying techniques are described which attempt to prevent this divergence. Extensions are developed resulting in adaptive forms and a...

Topics: DTIC Archive, Hagar, Jr, Hamilton, TEXAS UNIV AT AUSTIN APPLIED MECHANICS RESEARCH LAB,...

This paper discusses a critical gap in the U.S. Navy acquisition process. This gap is caused by the absence of workforce alignment metrics and metadata algorithms in two areas: (1) As applied to determining estimated cost per work breakdown element as part of the bid analysis process; and (2) after the award is granted, as part of the task management functions to ensure expectations associated with the original estimate can be reliably fulfilled. In this paper, the integration of workforce...

Topics: DTIC Archive, Nagy,Bruce, Catalyst Technologies Ridgecrest United States, Naval procurement, cost...

Wind tunnel experiments have been used for decades to collect data and build representative aerodynamic models; however, the model itself is usually static. This report focuses on the unique design of a dynamic, 3-degree-of-freedom (DOF) wind tunnel model, release mechanism, and sting that is capable of simulating free-flight of an 83-mm projectile using its own, self-contained electronics and maneuver mechanisms. The objective is to validate state estimation and control algorithms,...

Topics: DTIC Archive, Nelson,Bryant P, Bennett Aerospace Cary, wind tunnel models, finite element analysis,...

Using the single image super-resolution algorithm Super-Resolution Forests (SRF), this paper shows the ability to improve the prediction of high resolution bathymetry data. Borrowing the machine-learning technique of training and testing on a dictionary of sets data, we could create high resolution estimates of bathymetry data similar to estimates typically created with this technique using image data. By implementing a changed variance on the training process of the SRF algorithm, we were able...

Topics: DTIC Archive, Einsidleg,Dylan, Naval Research Laboratory Washington United States, high resolution,...

The full scope of this research is to develop a robust and reliable circadian phase estimation system, and use it for model identification and light-based control design. The objective of this project is to develop preliminary results in the following directions to lay the foundation of the full research. 1. Circadian phase estimation and control: Demonstrate the applicability of the adaptive notch filter (ANF) to extract circadian phase from noisy Drosophila locomotive activity measurements...

Topics: DTIC Archive, Wen,John T, Rensselaer Polytechnic Institute Troy United States, circadian rhythms,...

The purpose of this report is to introduce an adaptive estimation and parameter identification scheme which the authors call Multiple Model Estimation Algorithm (MMEA). The MMEA consists of a bank of Kalman filters with each matched to a possible parameter vector. The state estimates generated by these Kalman filters are then combined using a weighted sum with the a posteriori hypothesis probabilities as weighting factors. If one of the selected parameter vectors coincides with the true...

Topics: DTIC Archive, Athans, Michael, Chang, Chaw-Bing, MASSACHUSETTS INST OF TECH LEXINGTON LINCOLN LAB,...

This paper is concerned with the nonparametric estimation of a distribution function F, when the data are incomplete due to grouping, censoring and/or truncation. The situation occurs frequently in survivorship, reliability, and recidivism analysis. Using the idea of self-consistency, a simple algorithm is constructed and shown to converge monotonically to yield a maximum likelihood estimate of F. The procedure compares favourably with the more cumbersome Newton-Raphson method. A test is...

Topics: DTIC Archive, Turnbull, Bruce W., CORNELL UNIV ITHACA NY DEPT OF OPERATIONS RESEARCH, *TRUNCATION,...

A method is presented for fitting radioimmunoassay calibration curves which are used for measuring the concentration of various antigens in vitro. The curves to be fitted are modified hyperbolae on the basis of only a few observations (typically 12 to 16). Previous methods of fitting involved either linearizing the curve and estimating by least squares or fitting directly by nonlinear least squares. Unfortunately, the linearization techniques used are not usually successful in their intent and,...

Topics: DTIC Archive, Tiede ,James J, Pagano,Marcello, STATE UNIV OF NEW YORK AT BUFFALO STATISTICAL LAB,...

A method is proposed for the estimation of a general class of scalar linear time series models. The model takes the form of a stochastic difference equation for the dependent variable with exogenous variable inputs, and the disturbances are autocorrelated through an autoregressive moving average process. In the present paper an asymptotically efficient yet computationally simple estimation procedure (in the time domain) is derived for this model. The resulting estimator is shown to be...

Topics: DTIC Archive, Reinsel,Greg, CARNEGIE-MELLON UNIV PITTSBURGH PA DEPT OF STATISTICS, *STOCHASTIC...

In the present work, some aspects of digital communications over channels with memory are studied. The basic objective is to model channels with memory and to develop more efficient and reliable communication techniques over such channels. In particular, the receiver design problem for channels with memory is considered and then the relationship of receivers and channel models is examined. In the receiver design problem, fading is assumed to be the source of channel memory. First, the idea of...

Topics: DTIC Archive, Varshney,Pramod Kumar, ILLINOIS UNIV AT URBANA-CHAMPAIGN COORDINATED SCIENCE LAB,...

Instrumental variable (IV) regression is applied to the estimation of the parameters of a difference equation model of a process subject to noise. The technique preserves the simplicity of least-squares estimation, and is shown to significantly reduce the bias on the parameter estimates caused by measurement noise. A second-order example is used to illustrate the performance of the IV estimator, and to study the selection of sample time and initialization parameters. Demonstration is given on...

Topics: DTIC Archive, Touchstone,A T, Corripio,A B, LOUISIANA STATE UNIV BATON ROUGE DEPT OF CHEMICAL...

This paper presents the use of computer simulation to test the application of the instrumental-variable method of process identification to the adaptive temperature control of a chemical reactor. The method is shown to be stable when used in a closed-loop configuration to update the parameters of a discrete linear model of the reactor. The updated parameters are used to adjust the parameters of a feedback control algorithm. Dynamic information is generated by aperiodic changes in control...

Topics: DTIC Archive, Touchstone,A T, Corripio,A B, LOUISIANA STATE UNIV BATON ROUGE DEPT OF CHEMICAL...

Estimates of the variance of the estimated probability of error for linear classifiers under normal distributions are calculated as related to dimensionality and the number of features. (Author)

Topics: DTIC Archive, Mehrotra,Kishan, SYRACUSE UNIV N Y, *ERROR ANALYSIS, *DISCRIMINATE ANALYSIS, COMPUTER...

The problem of tracking submarine targets with passive sonobuoys is mathematically modelled. A comprehensive study is made of all the information available in the acoustic signals picked up by the sonobuoys and of the usefulness of this information in the estimation process. The presence of nonlinearities in the tracking model leads to the application of nonlinear estimation theory. Bayes formulation concepts are applied to generate approximate solutions and filtering algorithms, and the well...

Topics: DTIC Archive, da Cunha, Marcilio B, NAVAL POSTGRADUATE SCHOOL MONTEREY CA, *INFORMATION THEORY,...

In this paper wer describe some results obtained over the past few years in the areas of estimation and control. The point of this research is to find subclasses of systems that possess sufficient structure to allow us to determine optimal solutions or computationally feasible algorithms. In particular, we utilize several results from group theory (both for Lie and finite groups) to obtain our results. (Author)

Topics: DTIC Archive, Willsky,Alan S, MASSACHUSETTS INST OF TECH CAMBRIDGE DEPT OF ELECTRICAL ENGINEERING...

The principle of image estimation in the presence of linear and nonlinear observations is considered in this dissertation and a recursive estimation algorithm is developed. The development proceeds from the assumptions that the image is statistically characterized by its first two moments namely the mean and the autocorrelation while the observation is allowed to be a general function of the signal and noise. A two step recursive estimation procedure, compatible with the logical structure of...

Topics: DTIC Archive, Naraghi, Manouher, UNIVERSITY OF SOUTHERN CALIFORNIA LOS ANGELES IMAGE PROCESSING...

Automatic computer determination of object boundaries has attracted many researchers in the various areas of image processing for some time. The concept of boundary determination is basically motivated by problems in textural analysis (a subject in scene analysis) and robotics (a subject in artificial intelligence). In this dissertation, an object boundary estimator, applicable to a class of noisy images, will be introduced. The images considered will contain an object of interest within the...

Topics: DTIC Archive, Jahanshahi, Mohammad H, UNIVERSITY OF SOUTHERN CALIFORNIA LOS ANGELES IMAGE...

The restoration of color errors in digitally recorded color images is considered in this dissertation. A vector space model of a general digital color image recording system is derived and the equations representing the model and the equations of colorimetry are expressed in matrix form. Computer algorithms are derived which correct color errors introduced by imperfections in the color recording system. The sources of color error which are considered include sensor spectral responses which...

Topics: DTIC Archive, Mancill, Clanton E, UNIVERSITY OF SOUTHERN CALIFORNIA LOS ANGELES IMAGE PROCESSING...

Recursive algorithms for the solution of linear least-squares estimation problems have been based mainly on state-space models. It has been known, however, that such algorithms exist for stationary time-series, using input-output descriptions (e.g., covariance matrices). We introduce a way of classifying stochastic processes in terms of their 'distance' from stationarity that leads to a derivation of an efficient Levinson-type algorithm for arbitrary (nonstationary) processes. By adding...

Topics: DTIC Archive, Friedlander,B, Morf,M, Kailath,T, Ljung,L, STANFORD UNIV CALIF DEPT OF ELECTRICAL...

The expression 'data compression' has broad meaning and may encompass any or all of the following: data compaction, bandwidth compression, redundancy removal, redundancy reduction, adaptive sampling, parameter extraction, optimal estimation, and possibly a few other techniques. In general, data compression denotes operations which are performed to reduce the quantity of data prior to transmission, but which still preserve the minimum data elements of a measurement continuum such that the...

Topics: DTIC Archive, RANGE COMMANDERS COUNCIL WHITE SANDS MISSILE RANGE NM DATA REDUCTION AND COMPUTING...

The first two sections of this report survey the current techniques of identification and time series analysis for linear, time invariant, single-input, single-output systems with noisy measurements. Typically, this additive noise has been modeled either as being completely specified (e.g., a Gaussian with known parameters) or as being required to satisfy general conditions such as whiteness and non-correlation with the input. Departures from the assumed noise model sometimes cause severe...

Topics: DTIC Archive, VandeLinde,V David, BALLISTIC RESEARCH LABS ABERDEEN PROVING GROUND MD,...

Algorithms for computing the exact likelihood function of n successive observation vectors from an s-variate autoregressive moving average process of order (p,q) are developed. A quasi-Newton method is used to maximize the likelihood function with respect to the parameters of the process. Monte Carlo simulations are performed to compare the parameter estimates obtained by maximizing the exact likelihood function versus those obtained by maximizing various approximate forms of the likelihood...

Topics: DTIC Archive, Phadke,M S, WISCONSIN UNIV MADISON MATHEMATICS RESEARCH CENTER, *MULTIVARIATE...

This report presents and discusses several accepted techniques employed in the digital estimation of power spectra. These methods were applied to the calculation of power spectra of microthermal fluctuations. Discussed herein are such topics as preliminary data management, data windows, pre- whitening and post-darkening, confidence intervals, digital filtering, and the use of the fast Fourier transform algorithm (FFT).

Topics: DTIC Archive, Duncan, D D, OHIO STATE UNIV COLUMBUS ELECTROSCIENCE LAB, *DATA PROCESSING, *SPECTRUM...

This paper presents a theory of estimation of parameters in linear stochastic differential equations based on time-continuous observation. It uses a white noise model to represent observation errors (in contrast to a Wiener process model). The application is to the problem of identifying aircraft as well as turbulence (wind-gust) parameters from flight test data. Results obtained on actual data are presented.

Topics: DTIC Archive, Balakrishnan,A V, CALIFORNIA UNIV LOS ANGELES DEPT OF SYSTEM SCIENCE, *PARAMETRIC...

This report describes the implementation and experimental evaluation of a proposed decision aid to support naval Task Force Commanders. The decision aid, named the Sketch Model, enables a human operator to specify his subjective estimate of a multidimensional, multimodal, unsymmetric three dimensional function by electronically sketching its two-dimensional projection (e.g., iso-altitude contours of a three dimensional function) on a computer graphics terminal. The Sketch Model is hypothesized...

Topics: DTIC Archive, Irving,Gary W, INTEGRATED SCIENCES CORP SANTA MONICA CALIF, *DECISION MAKING,...

This report describes an extended Kalman filter (EKF) algorithm developed to estimate the aerodynamic coefficients of projectiles, based on discrete free-flight trajectory measurements. These measurements consist of three spatial positions and three angular orientations, relative to a fixed inertial coordinate system, and time-of-flight at 50 downrange positions along the trajectory. The algorithm is based upon a nonlinear six-degree-of-freedom model of a rotationally symmetric rigid body, and...

Topics: DTIC Archive, Brown,Charles M , Jr, ANALYTIC SCIENCES CORP READING MASS, *MATHEMATICAL MODELS,...

The relative efficiency of three computer search algorithms was compared for searching large bibliographic files with Boolean search strategies. The sequential and inverted files represent the two most common file structures used today for bibliographic searching. Superimposed coding is an alternative that is becoming more attractive as the speed of computers improves. The superimposed search has a key associated with each record in the data base to act as a screen to eliminate the majority of...

Topics: DTIC Archive, Hickey,Thomas Butler, ILLINOIS UNIV AT URBANA-CHAMPAIGN COORDINATED SCIENCE LAB,...

The NOISEMAP predictive procedure is used to describe the noise environment around airbases and thereby aid airbase planners to prevent community encroachment limiting the effectiveness of the installation. This report delineates the results of measurements made over one to three week periods at four Air Force airbases to acquire the data needed to validate and/or modify the noise predictive algorithms in NOISEMAP for takeoff, landing, traffic pattern, and ground runup operations. In general,...

Topics: DTIC Archive, Seidman,Harry, BOLT BERANEK AND NEWMAN INC CANOGA PARK CALIF, *AIRPORTS, *NOISE...

Suppose a sample of size n is observed from the d-dimensional density f. Conditions are given which insure that a single-linkage clustering algorithm can asymptotically find the decomposition of the support of f into connected closed sets. (Author)

Topics: DTIC Archive, Devroye,L P, TEXAS UNIV AT AUSTIN DEPT OF ELECTRICAL ENGINEERING, *PROBABILITY...

The concept of design to cost requires accurate cost estimation throughout the acquisition process of a major weapon system. Cost estimation is particularly important during the conceptual and validation phases. This research effort was directed toward improving cost estimation techniques for aircraft structures. Previous cost estimates had been derived through the use of a Vehicle Design and Evaluation Program (VDEP) which designed an aircraft structure to a minimum weight for a given set of...

Topics: DTIC Archive, Evans,Ronald L, AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OHIO SCHOOL OF SYSTEMS...

Cost estimation of USAF major weapon system package sales should be as accurate as possible to assure relationships with foreign customers are not strained. This thesis examines the cost estimation procedure of the F/RF-4 Systems Program Office, Financial Directorate, used to prepare a price and availability (P and A) estimate for Foreign Military Sales (FMS) requests. The study provides an analysis of the coordination process involved in an F/RF-4 P and A request, beginning with the foreign...

Topics: DTIC Archive, Flowers,Charles, AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OHIO SCHOOL OF SYSTEMS...

The estimation of object boundaries based on noisy observations is considered in the context of joint detection and estimation. The images are expressed as replacement processes and the boundaries modeled in terms of geometrical parameters associated with the object. The images studied have two textures, object and background, characterized by their first and second order statistics. A boundary processor consisting of optima estimator and detector is derived, for an appropriately chosen cost...

Topics: DTIC Archive, Lopez-Mora, Simon, UNIVERSITY OF SOUTHERN CALIFORNIA LOS ANGELES IMAGE PROCESSING...

A stochastic adaptive control problem that incorporates estimation cost considerations is formulated. A sensitivity index is introduced to represent the estimation cost. The control effort on estimation is distributed according to the accuracy required to achieve a given control objective when there is a bound on the estimation cost. The effect of the control on the sensitivity functions is used to influence the future uncertainties of the system. A dynamic feedback control algorithm is...

Topics: DTIC Archive, Padilla,Consuelo S, ILLINOIS UNIV AT URBANA-CHAMPAIGN COORDINATED SCIENCE LAB,...

In this report, which is the first part of a more comprehensive work, a solution algorithm is given for a hyperbolic conservation law. The algorithm is of an embedding type in that the solution is built up from Green's functions for simple processes taking place without reference to boundaries, and the locations of shocks are not explicitly followed. There is a discussion of boundary conditions and treatment of the Burgers and Korteweg-de Vries equations. Cursory mention is made of the...

Topics: DTIC Archive, Rogers,J C W, JOHNS HOPKINS UNIV LAUREL MD APPLIED PHYSICS LAB, *ALGORITHMS,...

Analytical redundancy offers high potential for solving the sensor redundancy problem. The current state-of-the-art in analytical redundancy contains a number of candidate filters which are developed here from a fundamental relationship of variables through hybrid simulation. Three analytical redundancy concepts of varying complexity were developed for the A-7D aircraft. Two monitor techniques were used: a multiple trip level exceedance criteria currently in use with voting systems, and a...

Topics: DTIC Archive, Cunningham,Tom, HONEYWELL INC MINNEAPOLIS MINN SYSTEMS AND RESEARCH CENTER,...

A design for a novel prototype finite element system is presented which meets the following four goals: the system constitutes an application-independent finite element solver for a certain class of linear elliptic problems based on a weak mathematical formulation; it incorporates extensive adaptive approaches to minimize the critical decisions demanded of the user; it incorporates adaptive error estimation techniques to provide an optimal solution within a prescribed cost range; and it takes...

Topics: DTIC Archive, Zave,Pamela, MARYLAND UNIV COLLEGE PARK COMPUTER SCIENCE CENTER, *FINITE ELEMENT...

A mathematical algorithm called GEOFAST which uses modern frequency domain estimation techniques is developed for estimating gravity quantities such as the undulation of the geoid and the gravity disturbance vector. GEOFAST removes a restriction associated with an earlier algorithm, namely that data tracks be significantly longer than the correlation distances of the gravity quantities being measured. In the new algorithm no restrictions are placed on data track length. (Author)

Topics: DTIC Archive, Heller,Warren G, ANALYTIC SCIENCES CORP READING MASS, *GRAVITATIONAL FIELDS, *GEOIDS,...

In recent years the Box-Jenkins method has become a popular technique for forecasting future behavior of a time series. Once the forecast model is known the method is very easy to employ and adequate computer packages are available for most purposes. Unfortunately the problem of determining the appropriate forecast model has, for models of any complexity, been one of the major stumbling blocks to the user of this method. In this paper a satisfactory solution to that problem is obtained and it...

Topics: DTIC Archive, Gray,H L, SOUTHERN METHODIST UNIV DALLAS TEX DEPT OF STATISTICS, *TIME SERIES...

This report represents the results of a study aimed at analyzing the needs and developing a concept for transmission control for the DCS Digital European Backbone (DEB) Network. Included in this report are considerations regarding operations concept, telemetry, data acquisition, processing, control and reporting. (Author)

Topics: DTIC Archive, Smith,Richard K, E-SYSTEMS INC ST PETERSBURG FL ECI DIV, *DATA TRANSMISSION SYSTEMS,...

It is argued that only phase, modulo-2 pi, is of interest in data communication applications. The probabilistic evolution of random walk phase, modulo-2 pi, is studied and the results used to derive a MAP sequence estimator for phase on the interval (-pi, pi). The MAP sequence estimator is a Viterbi tracker (or dynamic programming algorithm) for tracking phase on a finite-dimensional trellis in (-pi, pi). Computational requirements are discussed and several representative simulations are...

Topics: DTIC Archive, Scharf, Louis L, COLORADO STATE UNIV FORT COLLINS DEPT OF ELECTRICAL ENGINEERING,...

This report presents the concept of square root filters and the closely related U-D covariance factorization filter as viable alternatives to conventional Kalman filters. For a modest increase in computational loading, one obtains optimal filter algorithms equivalent to the Kalman filter if infinite wordlength is assumed, but with vastly superior numerical characteristics with finite wordlength. These algorithms are at least as good as a solution to troublesome measurement update computations...

Topics: DTIC Archive, Maybeck,Peter S, AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OHIO, *KALMAN FILTERING,...

A simple differential equation for the triangular square-root of the error covariance of the linear state estimator is derived. Previous algorithms involved an antisymmetric matrix in the square-root differential equation. In the constant model case, Chandrasekhar-type equations are shown to constitute a set of fast square-root algorithms for the derivative of the error variance. Square-Root algorithms for the smoothing problem are presented and as in the discrete case, an array method for...

Topics: DTIC Archive, Morf,M, STANFORD UNIV CALIF DEPT OF ELECTRICAL ENGINEERING, *STOCHASTIC PROCESSES,...

This paper describes a comprehensive new procedure for determining a minimum cost project schedule when the activities making up the project have durations which are random variables. The cost of an activity is assumed to be a convex piecewise linear function of the activity's mean duration. The objective is to determine the activity mean durations which both minimize the total project cost and insure that the mean of the corresponding project completion time distribution is less than or equal...

Topics: DTIC Archive, Sielken, Jr , R L, TEXAS A AND M UNIV COLLEGE STATION INST OF STATISTICS, *COST...

The abstract structure of the discrete control problem as it relates to manned systems has been refined and clarified. It has been shown that input-output data (information inputs to the operator, decision outputs from him) are representable by stochastic automata, a special type of discrete parameter, discrete state stochastic process. Further, the detailed structure of these systems has been examined and it has been shown that automata based on 1th order state spaces (i.e., states are...

Topics: DTIC Archive, Miller,Richard A, OHIO STATE UNIV RESEARCH FOUNDATION COLUMBUS, *CONTROL THEORY, *MAN...

In a previous work, a class of non-linear recursive estimators of cross-correlation was shown through simulations to be robust in identifying the parameters of linear, stationary, single-input-single-output systems whose output measurements are contaminated by noise which is not completely specified: the measurement noise distribution f is given by F=(1-epsilon) K + epsilon C, where K is completely known and C belongs to the class of zero-mean, symmetric, finite variance distributions. The...

Topics: DTIC Archive, VandeLinde,V David, JOHNS HOPKINS UNIV BALTIMORE MD, *IDENTIFICATION, *SYSTEMS...

Systems are modelled in order to understand and explain them better and as a prelude to action. The study has been aimed at two problem areas: multi-stage modelling estimation and identification algorithms for dynamic systems, and state estimation and a parameter identification for a new class of models -- causal functional equations -- which describe wave propagation in layered media systems. The first problem is concerned with developing estimation algorithms both for parameter and state...

Topics: DTIC Archive, Mendel,Jerry M, UNIVERSITY OF SOUTHERN CALIFORNIA LOS ANGELES DEPT OF ELECTRICAL...

Robust speech processing in practical operating environments requires effective environmental and processor noise suppression. This report describes the technical findings and accomplishments for the research program funded to develop real time, compressed speech analysis-synthesis algorithms whose performance is invariant under signal contamination. Fulfillment of this requirement is necessary to insure reliable secure compressed speech transmission within realistic military command and...

Topics: DTIC Archive, Boll, Steven F, UTAH UNIV SALT LAKE CITY SCHOOL OF COMPUTING, *NOISE REDUCTION,...