This book elucidates the problems, essential in practice, of the theory of automatic control and electric automation from the aspect of structural investigation methods. Analyzed is the effect of inner components which characterize the structure of elements and the complex control systems, as well as additional connections employed to obtain stability, precision, and other indices of sys tem. A mathematical device is described needed in the use of structural methods, based on the Laplace and...

Topics: DTIC Archive, Shatalov, A S, JOINT PUBLICATIONS RESEARCH SERVICE ARLINGTON VA, *AUTOMATION,...

This TR is actually a textbook on atmospheric entry for several classes at AFIT. It teaches from an analytical perspective, with finding closed-form solutions being the preferred approach. The over-arching goal is to instill and understand how families of solutions behave as well as the general trends, trade-offs, and the nature of atmospheric entry before picking point designs to study in detail. By thoroughly understanding the classic analytic analyses first, we can better use the computer to...

Topics: DTIC Archive, AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH GRADUATE SCHOOL OF ENGINEERING AND...

Computational Fluid Dynamics (CFD) has become a major design tool for designers of turbomachinery. The progress in this area is fast, and the use of 3-D methods is becoming increasingly applicable to the design process. This Lecture Series will improve the knowledge in the NATO nations on how to utilize the modern tools of CFD to increase the efficiency, reduce the fuel consumption, and increase the affordability of aircraft engines. Its aim is a unique forum in which the designers from leading...

Topics: DTIC Archive, ADVISORY GROUP FOR AEROSPACE RESEARCH AND DEVELOPMENT NEUILLY-SUR-SEINE (FRAN CE),...

The ASTROS (Automated Structural Optimization System) procedure provides a multidisciplinary analysis and design capability for aerospace structures. The engineering analysis capabilities in the system include structural analysis (static and dynamic), aeroelastic analysis (static and dynamic) and automated design. A specifically designed data based and executive system were implemented to maximize the system's efficiency, flexibility, and maintainability. This report is the User's Manual for...

Topics: DTIC Archive, Neill, D J, NORTHROP CORP HAWTHORNE CA AIRCRAFT DIV, *AERONAUTICAL ENGINEERING,...

The conference papers and state-of-the-art reports have been printed in two volumes which will be issued before the conference. The third volume containing reports, discussions, authors' replies, speeches and special programs, will be issued after the conference. The first volume contains 136 papers, and the second volume contains 100 papers and six state-of-the-art papers. Partial contents of Volume II include: New Solutions to Traditional Geotechnical Problems (Case Histories); Case Histories...

Topics: DTIC Archive, Prakash, Shamshear, MISSOURI UNIV-ROLLA, *STRUCTURAL ENGINEERING, *MILITARY...

The purpose of this MBA Project was to recommend force development solutions in terms of capabilities to meet the United States Army's future utility helicopter requirements. The last thorough review of requirements for the utility helicopter feet of the future was constricted in 2000. This project focuses on changes that have occurred in the Army's since then, and the extent to which various alternative courses of action address those changes. The report begins by briefly considering changes...

Topics: DTIC Archive, Bentzel, Thomas F, NAVAL POSTGRADUATE SCHOOL MONTEREY CA GRADUATE SCHOOL OF BUSINESS...

Linear elastic fracture mechanics has gained a substantial acceptance in industry and has become one of the most important design considerations. Many engineering structures such as airplanes, turbines, piping (pressure vessels), bridges, etc. contain pre-existing flaws. As a result of even rather moderate service loads, crack propagation resulting from these flaws can have a dramatic effect on the service life of the component. To account for this reduction in service life, fracture mechanics...

Topics: DTIC Archive, Woytowitz, Peter J, AEROSPACE STRUCTURES INFORMATION AND ANALYSIS CENTER...

Calibration and data reduction procedures are reported for a three sensor hot-wire probe used to determine all three velocity components in large amplitude turbulence at a speed of 65 ft./sec. Hot wire sensors were necessary because hot film sensors did not produce a steady, predictable signal for a large variation of the angle between the sensor axis and the stream. A digital computer was used to obtain an iterative solution of the equations relating the sensor signals to the velocity...

Topics: DTIC Archive, Willmarth,W W, MICHIGAN UNIV ANN ARBOR DEPT OF AEROSPACE ENGINEERING, *HOT WIRE...

The objective of this report is to survey many of the popular methods for the solution of large matrix equations with the hope of finding an efficient method suitable for both electromagnetic scattering and radiation problems and system identification problems.

Topics: DTIC Archive, Sarkar, Tapan K, ROCHESTER INST OF TECH NY DEPT OF ELECTRICAL ENGINEERING,...

Contents: Effect of Pole Pieces on the Axial Magnetic Field in Traveling Wave Tubes; An Analytical Study of Two-Stage Light Gas Gun Performance; A Low-Cost Local Area Network for Desktop Computers; Development of Prediction Models For Human Torque Strength; The Role of Antioxidant In Preventing Hyperbaric Oxygen Damage to the Retina; The Influence of Melting and Reactant Consumption on Temperature Transients in Spherical and Cylindrical Charges of EAK; Geostrophic Adjustment in a Three...

Topics: DTIC Archive, Courter, Robert W, SOUTHEASTERN CENTER FOR ELECTRICAL ENGINEERING EDUCATION INC ST...

Cylindrical array antennas are attractive for applications requiring uniform 360 azimuthal pattern performance. For very low sidelobe or precise angle measurement designs, an accurate knowledge of the mutually coupled element pattern becomes important. In Part 1 of this report, a modal solution is presented for an element pattern in a periodic array of axial dipole radiators placed coaxially over a circular cylindrical ground. This solution avoids the problems associated with asymptotic...

Topics: DTIC Archive, Tomasic, Boris, ROME AIR DEVELOPMENT CENTER GRIFFISS AFB NY, *ANTENNA RADIATION...

A field test of Hydroponic Units was conducted at the US Naval Facility, Argentia, Newfoundland under United States Navy Requirement USN 5-4, Intensive Agriculture Unit. Hydroponics is the growing of plants without soil using a nutrient solution. The units were environmentally controlled to temperature, humidity, and lighting wavelength and intensity. Salad portions (leaf lettuce, cukes, and tomatoes) were harvested daily for 200 personnel, two meals per day over a period of 18 months. Two...

Topics: DTIC Archive, Ayoub, J A, ARMY NATICK RESEARCH AND DEVELOPMENT LABS MA FOOD ENGINEERING LAB,...

The chromic compounds in the Forest Product Laboratories (FPL) etch solutions, used in preparing aluminum surfaces for adhesive bonding, present disposal problems. In this program, bonded aluminum samples were prepared with several surface preparation methods which did not include chromic compounds. Mechanical property tests were run to evaluate the surface preparation methods. Keywords: Surface finishing; Wedge test; Floating roller peel test; double lap shear test; Phosphoric acid...

Topics: DTIC Archive, Griffen, Charles, DAYTON UNIV OH RESEARCH INST, *ALUMINUM, *ADHESIVE BONDING, TEST...

A numerical study of laminar and turbulent flows past two dimensional bodies and axisymmetric bodies is presented. Numerical methods are developed to solve Navier-Stokes equations for two dimensional and axisymmetric flows in the arbitrary geometries. The complex physical geometry is resolved by use of numerically generated, body-fitted coordinates. The governing equations are written in the transformed domain using the orthogonal velocity components as dependent variable for momentum...

Topics: DTIC Archive, Chen, Ching-Jen, IOWA INST OF HYDRAULIC RESEARCH IOWA CITY, *NUMERICAL ANALYSIS,...

A voltammetric study of electron conduction in nitrobenzene(NB)/ toluene solutions is presented. Analysis of steady-state mass transport limited currents corresponding to the first and second one-electron reductions of NB (to the radical anion, NB-, and dianion, NB-2, respectively) indicates that electrogeneration of NB-2 is suppressed to negligible values in concentrated NB solutions as a result of the increased flux of electrons away from the electrode surface via the self-exchange...

Topics: DTIC Archive, Norton, John D, MINNESOTA UNIV MINNEAPOLIS DEPT OF CHEMICAL ENGINEERING AND MATERIALS...

Two mathematical programs are developed which determine strategies to interdict a network using limited resources. The first model identifies a set of arcs whose interdiction minimizes the maximum flow through the network, constrained by the available resources. The solution is a set of segments to interdict and a set of segments which are not interdicted, but determine the maximum flow in the interdicted network. The second model identifies a set of arcs whose interdiction isolates a targeted...

Topics: DTIC Archive, Steinrauf, Robert L, NAVAL POSTGRADUATE SCHOOL MONTEREY CA, *MODELS, *NETWORKS,...

The conjugate gradient algorithm (called CG hereafter) is a popular way to solve large sparse positive definite systems of equations. The minimum residual algorithm (called MR) is closely related to CG and can be applied to any nonsingular system. In this summary we describe, our result and, of more importance, comment on their significance. The discussion is confined to exact arithmetic because this enquiry concerns only the theory of MR, CG and related algorithms, not their implementation.

Topics: DTIC Archive, Parlett, B N, CALIFORNIA UNIV BERKELEY CENTER FOR PURE AND APPLIED MATHEMATICS,...

Recently reported observations by others indicates that a combination of a weak dc magnetic field and extra-low-frequency ac magnetic fields can produce resonant effects in biological systems. This study of resonant magnetic fields that consists of two parts: (1) calculations aimed at identifying the basic mechanisms underlying the resonance, and (2) measurements designed to determine more specifically how biological systems respond to the resonance condition. A sample model consisting of one...

Topics: DTIC Archive, Durney,Carl H, UTAH UNIV SALT LAKE CITY, *RESPONSE(BIOLOGY), *BIOMAGNETISM, *MAGNETIC...

This work first examines fundamental differences between measurement models established for GPS and those of proposed image-based navigation systems. In contrast to single value per satellite GPS pseudorange measurements, image measurements are inherently angle-based and represent pixel coordinate pairs for each mapped target. Thus, in the image-based case, special consideration must be given to the units of the transformations between the states and measurements, and also to the fact that...

Topics: DTIC Archive, AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF ENGINEERING AND MANAGEMENT,...

Using cutting-edge technology to create a human factors advantage in military operations will contribute to success on the battlefield of the future whether below the surface, on the surface, in the air, or in space. Human factors system selection in the past has appeared to be arbitrary and intermittent, with no unifying vision and apparently little or no coordination between the military services. Mature, timely applied technology will reduce risk and enhance combat capability. By decreasing...

Topics: DTIC Archive, Belland, Kris M, AIR UNIV MAXWELL AFB AL, *OPTIMIZATION, *MILITARY AIRCRAFT, *FLIGHT...

Research on the interaction between an incident laser beam and a flowing gas is described. The results include a discussion of the development and evaluation of a high power short wavelength source for experimental investigation of these interactions, as well as summary of work on theoretical analysis of the interaction. The source uses an Nd-Yag oscillator followed by two high-gain amplifier stages to provide requisite power levels. At present, testing has been done with only the oscillator...

Topics: DTIC Archive, Merkle,C L, PENNSYLVANIA STATE UNIV UNIVERSITY PARK, *LASER BEAMS, *GAS FLOW,...

An engineering model has been developed to compute the flight performance of the M864 base burn projectile. This model includes the coupled performance of the gas generator, effects of injected mass flow on the aerodynamics, and a modified point mass trajectory simulation. The gas generator model is based on measured burn rates and basic fluid dynamics. The discharge rate of the generator is calibrated against laboratory experiments. Effects of spin on burn rate are deduced from comparison of...

Topics: DTIC Archive, Danberg, James E, ARMY BALLISTIC RESEARCH LAB ABERDEEN PROVING GROUND MD, *SOLID...

The computer program CHIEF (G.W. Benthien, D. Barach, and D. Gillette, CHIEF Users Manual, Naval Ocean Systems Center Report 920, Sep 88) is designed to obtain approximate solutions to exterior steady-state acoustic radiation problems for surfaces of arbitrary shapes vibrating with a prescribed normal velocity. Being unable to view the shapes defined by CHIEF can lead to many difficult debugging problems as well as incorrect solutions. DISPLAY3D provides points as though the data were locations...

Topics: DTIC Archive, Siders, C M, NAVAL RESEARCH LAB ORLANDO FL UNDERWATER SOUND REFERENCE DETACHMENT,...

Topics: DTIC Archive, Schwarts, G. L., JOINT PUBLICATIONS RESEARCH SERVICE ARLINGTON VA, *METALS,...

The effects of moderate nonlinearity on the propagation of sound are appreciable, and become dominant at very high amplitudes. These effects and the phenomena of linear acoustics are described by the second-order-nonlinear wave equation, which is derived in this thesis and solved by numerical means. The validity of the solution is demonstrated by its agreement with various approximations in their domains of applicability, and by its reproduction of results derived from experiments. Using the...

Topics: DTIC Archive, McKendree,Francis Speed, PENNSYLVANIA STATE UNIV UNIVERSITY PARK APPLIED RESEARCH...

A Sliding Cylinder Rheometer (SCR) has been constructed for use with an existing Materials Test System (MTS) for the measurement of fast transient and steady-state responses of viscoelastic fluids in simple shear. Shearing is accomplished via coaxial displacement of the outer cylinder, while the inner one is held stationary. Matching pairs of circular rod and cylinder with precise dimensions, and thus well-defined annular spacings, are commercially available. The inner rod is threaded at one...

Topics: DTIC Archive, Tsai,A T, CALIFORNIA UNIV BERKELEY DEPT OF CHEMICAL ENGINEERING, *Fluids,...

Basic heat transfer empirical and analytic equations are applied to a double envelope airship concept which uses heated Helium in the inner envelope to augment and/or control gross lift. The convective and conductive terms lead to a linear system of five equations for the concept airship, with the nonlinear radiation terms included by an iterative solution process. A FORTRAN program, is used to perform the tedious calculations, and graphed results are obtained for the variables of interest....

Topics: DTIC Archive, Rapert, Ray M, NAVAL POSTGRADUATE SCHOOL MONTEREY CA, *HEAT TRANSFER, *HOT GASES,...

A unified theory of secondary instability in wall-bound shear flows has been developed. This theory rests on Floquet systems of stability equations and permits classification and quantitative analysis of different modes of secondary instability in the three-dimensional stage of laminar-turbulent transition. The catalogue of solutions is consistent with observations and predicts other phenomena that have not been identified in experiments. The theoretical results have been used to reproduce...

Topics: DTIC Archive, Herbert, Thorwald, VIRGINIA POLYTECHNIC INST AND STATE UNIV BLACKSBURG DEPT OF...

A two dimensional geometrically nonlinear shell theory applicable to arbitrary geometries that can be described by orthogonal curvilinear coordinates and encompassing large displacements and rotations for small strain situations has been developed. Additionally, the theory includes a parabolic transverse shear stress distribution through the thickness. Flat plate and cylindrical shell solutions do not shear lock based upon exact elemental integrations. Transverse shear deformation was found to...

Topics: DTIC Archive, Dennis, Scott T, AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF...

A tutorial is presented describing a general machine learning theory which spawns a class of energy minimizing machines useful in model identification, optimization, and associative memory. Special realizations of the theory include the Boltzmann machine and the Hopfield neural network. The theory is reinforced by appendices addressing particular facets of the machine, ranging from gradient descent to simulated annealing. The treatment is systematic, beginning with the description of the energy...

Topics: DTIC Archive, Eggers, Mitchell D, MASSACHUSETTS INST OF TECH LEXINGTON LINCOLN LAB, *ASSOCIATIVE...

The polymers used in this work are Ultem, a thermoplastic polyimide produced by General Electric, and Viton A, a fluoroelastomer made by Dupont. Both the polymer and rubber were chosen for this study because of their excellent thermal stability. Ultem is a heat and chemical resistant polymer that suffers from poor impact strength. The addition of a dispersed rubber phase to Ultem significantly reduces this problem. Compositional quenching is a process in which a single-phase solution consisting...

Topics: DTIC Archive, Furno, John S, RENSSELAER POLYTECHNIC INST TROY NY DEPT OF CHEMICAL ENGINEERING,...

The scattering of a plane wave from a periodic broken-wire grid buried in a dielectric sheet is studied for a general angle of incidence and for arbitrary linear polarisation. The scattered field is expanded in a set of Floquet modes, and the modal coefficients are obtained through the current expansion for a reflecting antenna. The general formulation of the problem is applicable for grids in an infinite dielectric and when located at the boundary interface of two dielectrics. A moment method...

Topics: DTIC Archive, Gallagher,J G, ROYAL SIGNALS AND RADAR ESTABLISHMENT MALVERN (ENGLAND), *GRIDS,...

The aquatic toxicity of a brass particulate was examined. Acute, 48-hour bioassays were performed using the water flea, Daphnia magna. Tests were conducted with uniform suspensions of uncoated brass particulate, brass particulate coated with a Teflon solution, silica, and titanium dioxide. The Teflon coating solution and the supernatant of the brass suspension (after settling of the brass) also were tested. The effective concentrations that would be lethal to 50% of a population were calculated...

Topics: DTIC Archive, Johnson,Dennis W, CHEMICAL RESEARCH AND DEVELOPMENT CENTER ABERDEEN PROVING GROUND...

This Phase I SBIR projet addressed the problem of processing the All-Sky Imaging Photometer (ASIP) images collected in support of ionospheric science programs at AFGL and elsewhere. Hardware and software tools are developed that efficiently transform any image of interest to suitable world coordinates, thus removing the geometric distortions introduced by the ASIP wide-angle lens. Interactive graphical tools are demonstrated for the composite display of multiple, concurrent ASIP images, in...

Topics: DTIC Archive, Lucas,R D, PHYSICAL DYNAMICS INC BELLEVUE WA, *IMAGE PROCESSING, *IONOSPHERE,...

Research conducted by the U.S. Army Research Institute for the Behavioral and Social Sciences (ARI) Infantry Forces Research Unit show that functional area training is typically not available to prepare the maneuver branch officers for their assigned staff duties. The Brigade Commander's Battle Staff Handbook, presented here, offers a partial solution to this problem. This handbook provides commanders with a convenient source of battle staff specific content for immediate use by their staff....

Topics: DTIC Archive, Andre, Charles R., BDM FEDERAL INC ALBUQUERQUE NM, *BRIGADE LEVEL ORGANIZATIONS,...

We construct a nonlinear kinetic equation and prove that it is well- adapted to describe general multidimensional scalar conservation laws. In particular we prove that it is well-posed uniformly in epsilon - the microscopic scale. We also show that the proposed kinetic equation is equipped with a family of kinetic entropy functions - analogous to Boltzmann's microscopic H-function, such that they recover Krushkov-type entropy inequality on the macroscopic scale. Finally, we prove by both - BV...

Topics: DTIC Archive, Perthame, Benoit, INSTITUTE FOR COMPUTER APPLICATIONS IN SCIENCE AND ENGINEERING...

This review broadly examines the interactions between freeze-thaw processes and soil chemistry, focusing on (1) the effect of solutes on physical properties such as freezing-point depression, unfrozen water and frost heaving, (2) the effect of freeze-thaw cycles and low temperatures on soil chemistry, and (3) modeling of freeze-thaw processes and chemistry. The presence of solutes causes a freezing-point depression, which increases the amount of unfrozen water in soils. Liquid films on soil...

Topics: DTIC Archive, Marion, Giles M., COLD REGIONS RESEARCH AND ENGINEERING LAB HANOVER NH, *FREEZING,...

A theoretical study is described of the aerodynamic characteristics at small angle of attack of a thin, double-wedge profile in the range of supersonic flight speed in which the bow wave is detached. The analysis is carried out within the framework of the transonic (nonlinear) small-disturbance theory, and the effects of angle of attack are regarded as a small perturbation on the flow previously calculated at zero angle. The mixed flow about the front half of the profile is calculated by...

Topics: DTIC Archive, Vincenti, Walter G, NATIONAL AERONAUTICS AND SPACE ADMINISTRATION WASHINGTON DC,...

This paper presents a procedure for using NASTRAN to determine the flow field about arbitrarily shaped bodies in the presence of a free surface. The fundamental unknown of the problem is the velocity potential which must satisfy Laplace's equation in the fluid region. Boundary conditions on the free surface may involve second order derivatives in space and time. In cases involving infinite domains either a tractable radiation condition is applied at a truncated boundary or a series expansion is...

Topics: DTIC Archive, Zarda,P Richard, DAVID W TAYLOR NAVAL SHIP RESEARCH AND DEVELOPMENT CENTER BETHESDA...

A general steady through-flow theory of nonviscous fluid in turbomachines: of arbitrary hub- and casing-wall shapes with subsonic or supersonic velocity is presented. The theory is applicable to both direct and inverse problems and is derived primarily for use in turbomachines having thin blades of high solidity with a simple approximate correction factor for blade-thickness effect. Through the use of the stream function, the continuity equation and the equation of motion in the radial...

Topics: DTIC Archive, Wu, Chung-Hua, NATIONAL AERONAUTICS AND SPACE ADMINISTRATION WASHINGTON DC, *SUBSONIC...

We present a new approach towards the construction of a genuinely multidimensional high-resolution scheme for computing steady-state solutions of the Euler equations of gas dynamics. The unique advantage of this approach is that the Gauss-Seidel relaxation is stable when applied directly to the high-resolution discrete equations, thus allowing us to construct a very efficient and simple multigrid steady-state solver. This is the only high-resolution scheme known to us that has this property....

Topics: DTIC Archive, Sidilkover, David, INSTITUTE FOR COMPUTER APPLICATIONS IN SCIENCE AND ENGINEERING...

Contributions to solving initial boundary value problems for partial differential equations have been made by applying finite-difference methods to solve seismic wave propagation problems. Very little has been done in the area of underwater acoustic wave propagation problems, although a set of properly developed numerical methods could very well solve these problems effectively. These numerical methods can solve not only range-dependent problems but also can handle irregular boundaries with...

Topics: DTIC Archive, Lee, Ding, NAVAL UNDERWATER SYSTEMS CENTER NEW LONDON CT, *ACOUSTIC WAVES, *BOUNDARY...

Previous studies predicted the F-15B high angle of attack and flat spin behavior using bifurcation analysis. These studies varied control surface deflections to find equilibrium and periodic solutions. The purpose of this research was to use bifurcation analysis to predict the F-15B high angle attack and flat spin behavior as a result of variable thrust, asymmetric thrust, and thrust vectoring. Using a previously developed model of the F-15, bifurcation analysis and continuation methods were...

Topics: DTIC Archive, McDonnell, Robert J, AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF...

Total internal reflection fluorescence (TIRF) is developed as a surface selective method to allow the environment of a liquid-solid interface to be probed by fluorescent molecules which are adsorbed from solution. The method has been used to detect pyrene sorbed to an octadecylsilane derivatized, fused silica plate and resolve its spectral emission so that vibronic intensity ratios can be calculated and the surface environment characterized. Adsorption equilibria of the fluorescent probe to the...

Topics: DTIC Archive, Hartner, K C, UTAH UNIV SALT LAKE CITY DEPT OF CHEMISTRY, *SILICON DIOXIDE, *SOLIDS,...

High Performance Computing (HPC) is an enabling technology for a large class of Army needs including weapon system design, simulation and modeling, intelligence, automation, advanced manufacturing, and training. Recognizing this, in 1989 Army established the Army HPC Research Center. The Center consists of four integrated activities: interdisciplinary research into various aspects of HPC including novel solution techniques, advanced algorithms, applications, and graphics and visualization (GV);...

Topics: DTIC Archive, Tezduyar, Tayfun, SPAUSCHUS ASSOCIATES INC STOCKBRIDGE GA, *COMPUTATIONS, *ARMY...

Fluid-structure interaction problems prove difficult due to the coupling between fluid and solid behavior. Typically, different theoretical formulations and numerical methods are used to solve fluid and structural problems separately. The least-squares finite element method is capable of accurately solving both fluid and structural problems. This capability allows for a simultaneously coupled fluid structure interaction formulation using a single variational approach to solve complex and...

Topics: DTIC Archive, Rasmussen, Cody C, AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH GRADUATE SCHOOL OF...

The purpose of this study was to determine whether a mix of 5/4- and 5-ton payload trucks, with associated trailers, would be a more cost effective program solution than the proposed Family of Medium Tactical Vehicles (FMTV) 2 1/2- and 5-ton solution. A substitution algorithm based upon individual vehicle missions was developed and four alternative truck and trailer fleets were defined for 260 Army TOEs representing about 72% of the 2 1/2-ton truck fleet. Each alternative had at least the...

Topics: DTIC Archive, Currie, Robert, SCIENCE APPLICATIONS INTERNATIONAL CORPMCLEAN VA MILITARY OPERATIONS...

This study concentrates on the least-squares resolution of the parametric adjustment model. In general this model may occur in a linear or a nonlinear form, and may or may not have constraints associated with it. The constraints, if present, may be linear or nonlinear. Furthermore, two basic categories of constraints are available, namely the familiar equality constraints (i.e., exact relations which must be fulfilled by the parameters), and the relatively new category of inequality...

Topics: DTIC Archive, Blaha, Georges, NOVA UNIV OCEANOGRAPHIC CENTER DANIA FL, *LEAST SQUARES METHOD,...

Several issues in using parallel processing for image understanding are addressed. First, efficient schemes for parallel image array access are developed. New class of latin squares called perfect latin squares are defined. Several construction methods are shown and some useful properties of such squares are identified. A generic parallel model of computation employing electro optical devices is developed. Parallel techniques for image computations are developed on this model. Finally,...

Topics: DTIC Archive, Nevatia, R, UNIVERSITY OF SOUTHERN CALIFORNIA LOS ANGELES INST FOR ROBOTICS AND...

Crandall has worked on several questions including applications of nonlinear semigroup theory to nonlinear diffusion problems, the abstract theory of evolution equations, the theoretical basis for Hamilton Jacobi equations in infinite dimensions and its application to dynamic programming in infinite dimensional control and differential games, and the theory of viscosity solutions of fully nonlinear second order partial differential equations. Rabinowitz has worked on a variety of problems which...

Topics: DTIC Archive, Crandall, Michael G, WISCONSIN UNIV-MADISON, *CONTROL, SIZES(DIMENSIONS), THEORY,...