27
27

Jan 7, 2017
01/17

by
AD Publication, IJOER, A. Marianski, I.J. Jozwiak

texts

######
eye 27

######
favorite 0

######
comment 0

Abstract â€” The objective of the study is estimating probability density functions of arithmetic operations on random variables. There are many methods that use specific parametrical and non-parametrical models in order to obtain accurate results. However, there are not many studies on speed of convergence and computation complexity of these methods. This paper introduces a new method of estimation used to obtain results on bounded random variables. The method is based on a new publication...

Topics: Random Variables, Arithmetical operations, Numerical integration, Curve Interpolation, Monte Carlo...

The conference was held as scheduled. Abstracts of papers presented at the Conference appear in a report distributed by the University of Wisconsin-Madison. Keywords: Stochastic processes, Conference, Probabilities, Stochastic flows, Random variables, Boltzman equations.

Topics: DTIC Archive, Griffeath, D, WISCONSIN UNIV-MADISON, *SYMPOSIA, *STOCHASTIC PROCESSES, *EQUATIONS,...

The first problem considered in the paper is concerned with the assembly of independent components into parallel systems so as to maximize the expected number of system that perform satisfactorily. Associated with each component is a probability of it performing successfully. It is shown that an optimal assembly is obtained if the reliability of each assembled system can be made equal. If such equality is not attainable, then bounds are given so that the maximum expected number of systems that...

Topics: DTIC Archive, Derman, Cyrus, STANFORD UNIV CA, *RELIABILITY, ALGORITHMS, OPTIMIZATION, PROBABILITY,...

190
190

May 27, 2011
05/11

by
Turner, James E.; Hueter, Uw

texts

######
eye 190

######
favorite 0

######
comment 0

Currently, NASA and its industry partners are performing ground testing of hydrogen-fueled rocket based combined-cycle flowpaths. Successful ramjet and scramjet testing at Mach 6 and scramjet testing at Mach 8 have been performed. Cold flow mixing tests have also been successfully performed as have inlet operability tests. Additional testing of RBCC flowpaths at air augmented rocket and rocket only modes is underway.

Topics: RANDOM VARIABLES, SUBSTRUCTURES, DEGREES OF FREEDOM, MONTE CARLO METHOD, ALTERNATIVES, RELIABILITY,...

Click here to view the University of Florida catalog record

Topics: Distribution (Probability theory), Mathematical statistics, Multivariate analysis, Random...

Both observational and laboratory studies suggest that human beings find it difficult to fabricate truly random numbers. Any sufficiently large set of nominally random number sequences, irrespective of its source, may be analyzed to determine if the criterion of randomness is satisfied. Statistical methods have, therefore, been applied forensically to detect anomalies in accounting data, scientific data sets, and voting data. As a case study, we apply methods developed by Beber and Scacco to...

Topics: DTIC Archive, NAVAL RESEARCH LAB WASHINGTON DC, *ELECTIONS, ANOMALIES, DETECTION, RANDOM VARIABLES,...

In this paper, we describe an algorithm for finding approximate nearest neighbors (ANN) in d-dimensional Euclidean space for each of N user-specified points {x(j)}. For each point x(j) , the scheme produces a list of k suspects , that have high probability of being the k closest points (nearest neighbors) in the Euclidean metric. Those of the suspects that are not among the true nearest neighbors, are close to being so.

Topics: DTIC Archive, YALE UNIV NEW HAVEN CT DEPT OF COMPUTER SCIENCE, *ALGORITHMS, RANDOM VARIABLES,...

Topics: DTIC Archive, MARSAGLIA, GEORGE, BOEING SCIENTIFIC RESEARCH LABS SEATTLE WA, *RANDOM VARIABLES,...

This project is focused on conducting the first randomized-controlled trial of Cognitive Enhancement Therapy (CET) in 54 verbal adults with autism spectrum disorders, and assessing the efficacy of this approach in comparison to an active Enriched Supportive Therapy (EST) intervention.

Topics: DTIC Archive, PITTSBURGH UNIV PA, *MENTAL DISORDERS, ADULTS, CLINICAL TRIALS, COGNITION, RANDOM...

Ariyawansa and Zhu [3] have proposed a new class of optimization problems termed stochastic semidefinite programs (SSDPs) to handle data uncertainty in applications leading to (deterministic) semidefinite programs (DSDPs). For the case where the event space of the random variables in an SSDP is finite they have also derived a class of volumetric barrier decomposition algorithms, and proved polynomial complexity of the short-step and long-step members of the class [2]. When the event space of...

Topics: DTIC Archive, WASHINGTON STATE UNIV PULLMAN, *ALGORITHMS, *RANDOM VARIABLES, POLYNOMIALS,...

48
48

Oct 5, 2015
10/15

by
Brendmoen, Jack V.;Netzer, David W.

texts

######
eye 48

######
favorite 0

######
comment 0

Title from cover

Topic: NAVIGATION.,ESTIMATION THEORY.,RANDOM VARIABLES.,CALCULATORS PROBLEMS, EXERCISES, ETC.,NAVAL...

119
119

Jul 11, 2010
07/10

by
Wolf, M.; Crossman, L. D

texts

######
eye 119

######
favorite 0

######
comment 0

Si reduction, purification and sheet generation work has been concentrated on gaining information about a reduction process combined with purification (higher purity arc furnace with gas blowing and gradient freezing), transport process with purification and polycrystal sheet growth potential (SiF2), plastic deformation for sheet generation, and float zone sheet recrystallization.

Topics: DISTRIBUTION MOMENTS, RADIAL DISTRIBUTION, RANDOM VARIABLES, RAYLEIGH DISTRIBUTION, GRAPHS...

Naval Postgraduate School

153
153

Jan 25, 2013
01/13

by
Brendmoen, Jack V.;Netzer, David W.

texts

######
eye 153

######
favorite 0

######
comment 0

Title from cover

Topics: NAVIGATION., ESTIMATION THEORY., RANDOM VARIABLES., CALCULATORS PROBLEMS, EXERCISES, ETC., NAVAL...

247
247

May 29, 2011
05/11

by
Dennis, Henry J., Jr.; Sanders, Ti

texts

######
eye 247

######
favorite 0

######
comment 0

This presentation consists of viewgraph which review the test program and the results of the tests for the Gas Generator (GG) component for the Fastrac Engine. Included are pictures of the Fastrac (MC-1) Engine and the GG, diagrams of the flight configuration, and schematics of the LOX, and the RP-1 systems and the injector assembly. The normal operating parameters are reviewed, as are the test instrumentation. Also shown are graphs of the hot gas temperature, and the test temperature profiles....

Topics: RELIABILITY, RISK, PROCEDURES, FAILURE ANALYSIS, REDUNDANCY, SYSTEM FAILURES, FAILURE, MONTE CARLO...

Naval Postgraduate School

121
121

Jan 25, 2013
01/13

by
Lubeck, Olaf M.;Rosmond, Thomas.;Williams, R. T.

texts

######
eye 121

######
favorite 0

######
comment 0

Technical report period: October 1976-June 1977.

Topics: RANDOM VARIABLES--COMPUTER PROGRAMS., RANDOM NUMBER GENERATORS--COMPUTER PROGRAMS., RANDOM NUMBER...

The little book edited by H. O. Ondar contains a collection of letters by A. Markov and A. A. Chuprov exchanged before 1913. In that year the Imperial Academy of Sciences in Moscow celebrated the bicentenary of the law of large numbers symbolized by Ars Conjectandi: the work of Jacob Bernoulli, the Markov/Chuprov correspondence, combined with some other material, provides an interesting perspective on the early history of the modern theory of probability. (Author)

Topics: DTIC Archive, Neyman,Jerzy, CALIFORNIA UNIV BERKELEY STATISTICAL LAB, *HISTORY, *MARKOV PROCESSES,...

213
213

Jul 11, 2010
07/10

by
Brundidge, K. C

texts

######
eye 213

######
favorite 0

######
comment 0

The structure of wakes and how this structure is related to the size and shape of buildings and other obstacles, and to ambient winds, was investigated. Mean values of natural atmospheric flow were obtained and used in conjunction with theoretical relationships developed by dimensional analysis to establish a model of the flow in the wake. Results indicate that conventional and V/STOL aircraft passing through the wake during takeoff and landing would experience not only a change in turbulence...

Topics: LINEAR TRANSFORMATIONS, OPTICAL DATA PROCESSING, ALGORITHMS, NORMAL DENSITY FUNCTIONS, RANDOM...

202
202

Jan 27, 2012
01/12

by
Rosenthal, Jeffrey S. (Jeffrey Seth)

texts

######
eye 202

######
favorite 2

######
comment 0

Includes index

Topics: Probability & Statistics - General, Mathematics, Probabilities, Random variables, Chance,...

16,261
16K

Mar 1, 2018
03/18

by
MIT OpenCourseWare

movies

######
eye 16,261

######
favorite 2

######
comment 0

View the complete course: https://ocw.mit.edu/RES-6-012S18 Instructor: John Tsitsiklis,Â Patrick Jaillet The tools of probability theory, and of the related field of statistical inference, are the keys for being able to analyze and make sense of data. These tools underlie important advances in many fields, from the basic sciences to engineering and management. This resource is a companion site to 6.041SC Probabilistic Systems Analysis and Applied Probability. It covers the same content, using...

Topics: RES.6-012, RES.6, probability, probability models, bayes rule, discrete random variables,...

33
33

Sep 11, 2018
09/18

by
Kilian, Joe

texts

######
eye 33

######
favorite 0

######
comment 0

Uses of Randomness in Algorithms and Protocols makes fundamental contributions to two different fields of complexity theory: computational number theory and cryptography. The most famous result is Goldwasser and Kilian's invention of a new approach to distinguish prime numbers from composites, using methods from the theory of elliptic curves over finite fields. The Goldwasser-Kilian algorithm is the first to yield a polynomial size proof of its assertions, ensuring correctness while still...

Topics: Computer science, Random variables, Computer algorithms, Computer network protocols, Informatique,...

The long-term goal of the research is to provide an effective intervention for the prevention of secondary and escalating effects of poor anger control associated with trauma-related anger problems. The specific objectives are to 1) adapt an existing evidence-based cognitive-behavioral intervention (CBI) for the treatment of anger to specific needs of military personnel returning from hazardous deployments, and 2) conduct a randomized pilot study providing preliminary data on the efficacy and...

Topics: DTIC Archive, BROWN UNIV PROVIDENCE RI, *POST TRAUMATIC STRESS DISORDER, *MILITARY PERSONNEL,...

Suppose that n arcs with random lengths having distributions F1, F2, ...Fn are placed uniformly and independently on a circle. This article presents inequalities which tell how certain distributions and probabilities change as the variability of the distributions F1, F2, ...Fn is increased. A distribution F is considered to be more variable than G if integral h(x)dF(x) or = integral h(x)dG(x) for all convex functions h. (Author)

Topics: DTIC Archive, Huffer,F, STANFORD UNIV CA DEPT OF STATISTICS, *DISTRIBUTION FUNCTIONS, *CIRCLES,...

In this paper we obtain central limit theorems for some dependent random variables which are used to describe the distribution of magnetic spins present in a ferromagnet crystal. A ferromagnet crystal consists of a large number of sites. At site i there is some amount of magnetic spin present. The magnetic spin present at any site interacts with the magnetic spins at its neighboring sites and hence gives rise to some dependency among the magnetic spin present.

Topics: DTIC Archive, Chaganty,Narasinga Rao, FLORIDA STATE UNIV TALLAHASSEE DEPT OF STATISTICS,...

The report describes three position estimation procedures. The first is for combining estimates from different sources into a composite position estimate. The second is for generating a position estimate from bearing on or from two or more locations. The third is for generating a position estimate from two or more lines of bearing. The second revision represents a complete restructing of the report. In addition to containing corrections to several errors that are present in the original...

Topics: DTIC Archive, Forrest, R N, NAVAL POSTGRADUATE SCHOOL MONTEREY CA, *STATISTICAL ANALYSIS,...

Contents: Introduction; properties of hypercontractive random variables; hypercontractivity on the real line; hypercontractivity in normal spaces. Keywords: Stochastic processes; Inequalities.

Topics: DTIC Archive, Szulga, Jerzy, NORTH CAROLINA UNIV AT CHAPEL HILL DEPT OF STATISTICS, *RANDOM...

The specific objectives of this research were to adapt a cognitive-behavioral intervention (CBI) for the treatment of anger to specific needs of military personnel returning from hazardous deployments, and to conduct a randomized pilot study providing preliminary data on the adapted intervention. The Phase I open trial showed medium to large pre to post treatment effect sizes for CBI. In phase II, 25 participants were randomized to CBI or the control condition (Supportive Intervention, SI); 23...

Topics: DTIC Archive, BROWN UNIV PROVIDENCE RI, *POST TRAUMATIC STRESS DISORDER, DEPLOYMENT, RANDOM...

We propose a new metamodeling method to characterize the output \201response\202 random process of a dynamic system with random parameters, excited by input random processes. The metamodel can be then used to efficiently estimate the time-dependent reliability of a dynamic system using analytical or simulation-based methods. The metamodel is constructed by decomposing the input random processes using principal components or wavelets and then using a few simulations to estimate the distributions...

Topics: DTIC Archive, OAKLAND UNIV ROCHESTER MI DEPT OF MECHANICAL ENGINEERING, *COMPUTATION SCIENCE,...

The main objective of this proposal is to study the effect of increasing doses of vitamin D3 in a group of young women with hypovitaminosis D (serum 25OHD 20 ng/ml) and an adequate calcium intake of 1200 -1400mg/day. This is a double blind randomized placebo controlled study .There will be 5 treatment arms, four vitamin D3 dose groups (400, 800, 1600, 2400 IU/day, placebo). Calcium citrate tablets will be given to maintain the calcium intake between 1200-1400mg/d. The study will recruit up to...

Topics: DTIC Archive, CREIGHTON UNIV OMAHA NE, *VITAMIN D, *NUTRITION, RECRUITING, WOMEN, ORAL DOSAGE,...

The purpose of this study is to compare ear acupuncture plus standard therapy versus standard therapy alone (narcotic and non-narcotic analgesia) in reduction of intravenous (IV) and oral pain medication use, time to ambulation without assistance, time to discharge from Post-Anesthesia Care Unit (PACU) and Same-Day Surgery Unit (SDSU) and return to duty time following ambulatory arthroscopic knee surgery. In summary, the intervention (BFA) did not show any significant improvement in pain...

Topics: DTIC Archive, MIKE O'CALLAGHAN FEDERAL HOSPITAL LAS VEGAS NV, *ACUPUNCTURE, *KNEE(ANATOMY),...

Topics: DTIC Archive, Rudolph,Daniel, STANFORD UNIV CA DEPT OF STATISTICS, *ORDER STATISTICS, RANDOM...

Models are given for sequences of correlated exponential interarrival and service times for a single server queue. These multivariate exponential models are formed as probabilitic linear combinations of sequences of independent exponential random variables and are easy to generate on a computer. Limiting results for customer waiting time under heavy traffic conditions are obtained for these queues. Heavy traffic results are useful for analyzing the effect of correlated interarrival and service...

Topics: DTIC Archive, Jacobs,P A, NAVAL POSTGRADUATE SCHOOL MONTEREY CA, *QUEUEING THEORY, MATHEMATICAL...

For normal random walks S sub 1, S sub 2, ..., formed from independent, identically distributed random variables X sub 1, X sub 2, ..., we determine the asymptotic behavior under regularity conditions of P(S sdub n mg(n/m) for some n m sub m = mxi, = m lambda0), xi g (1), where U sub m = X sub one to the 2nd power + ... + X sub m to the 2nd power. The result is applied to a normal change-point problem to approximate null distributions of test statistics and to obtain approximate confidence sets...

Topics: DTIC Archive, James,Barry, STANFORD UNIV CA DEPT OF STATISTICS, *PROBABILITY, DISTRIBUTION,...

The current state of development of corrected diffusion approximations for first passage times to linear boundaries is reviewed. Some new results and several applications are described. Corrected diffusion approximations and large deviation approximations to the power function of a repeated significance test for a normal mean (known variance) are compared and contrasted. (Author)

Topics: DTIC Archive, Siegmund,D, STANFORD UNIV CA DEPT OF STATISTICS, *Diffusion theory,...

Several methods are discussed for confidence set estimation of a change-point in a sequence of independent observations from completely specified distributions. The method based on the likelihood ratio statistic is extended to the case of independent observations from a one parameter exponential family. Joint confidence sets for the change-point and the parameters of the exponential family are also considered.

Topics: DTIC Archive, Siegmund,David, STANFORD UNIV CA DEPT OF STATISTICS, *CONFIDENCE LIMITS, RANDOM...

Influence diagrams were originally conceived as a way of visually representing dependencies among random variables. It was recognized that they provide an effective means of communicating probabilistic information in complex, uncertain situations. They were soon generalized to include decision as well as chance variables. An earlier SRI report, Development of Automated Aids for Decision Analysis (Miller, et al., May 1976), describing influence diagrams and showed that they are a more...

Topics: DTIC Archive, Korsan,Robert J, DECISIONS AND DESIGNS INC MCLEAN VA, *DECISION MAKING, AUTOMATION,...

The subject of this paper is the analysis of a randomized preprocessing scheme that has been used for query processing in robot motion planning. The attractiveness of the scheme stems from its general applicability to virtually any motion planning problem, and its empirically observed success. In this paper we initiate a theoretical basis for explaining this empirical success. Under a simple assumption about the configuration space, we show that it is possible to perform a preprocessing step...

Topics: DTIC Archive, Kavraki, Lydia, STANFORD UNIV CA DEPT OF COMPUTER SCIENCE, *MOTION, *PLANNING,...

We study finite difference approximations to weak solutions of the Cauchy problem for hyperbolic systems of conservation laws in one space dimension. We establish stability in the total variation norm and convergence for a class of hybridized schemes which employ the random choice scheme together with perturbations of classical conservative schemes. We also establish partial stability results for classical conservative schemes. Our approach is based on an analysis of finite difference operators...

Topics: DTIC Archive, DiPerna,Ronald J, WISCONSIN UNIV-MADISON MATHEMATICS RESEARCH CENTER, STABILITY,...

The contractor will investigate two processes for the conversion of Cf3Br to Cf3I and perform a detailed analysis of the practical implementation of adapting these technologies to full scale production including reactor design (kinetic variables, heat and fluid flow characteristics and non-ideal flow, multiple step reactions, etc) and construction of the reactor itself.

Topics: DTIC Archive, Kennedy, Eric, NEWCASTLE UNIV (AUSTRALIA), *FLAMES, *INHIBITION, *FLUID FLOW, RANDOM...

245
245

Jul 12, 2010
07/10

by
Liebert, J

texts

######
eye 245

######
favorite 0

######
comment 0

Numerous discoveries with the IUE Observatory have stimulated research on most spectroscopic types of degenerate dwarf stars. The hottest helium-rich cases apparently have substantial abundances of certain ions heavier than helium, due most likely to selective radiative acceleration. Hydrogen DA stars show trace abundances at temperatures as low as 20,000 K and provide evidence for modest outflowing winds. Cooler DA stars exhibit mysterious broad features near 1400A and 1600A. The element...

Topics: ADAPTIVE CONTROL, STOCHASTIC PROCESSES, DATA PROCESSING EQUIPMENT, MULTIVARIATE STATISTICAL...

This paper derives such an inequality for a large class of density functions and a large class fo convex sets. The most general results are given for the bivariate case. An extention to the n-dimensional case appears to be difficult except for some special cases such as the case of independent identically distributed random variables or when the underlying joint density is spherically symmetric. The class of convex sets considered includes D sub infinity and D sub 2 as special cases and special...

Topics: DTIC Archive, Shaked,Moshe, ARIZONA UNIV TUCSON, *INEQUALITIES, DENSITY, RANDOM VARIABLES,...

Although most people doing survey work would prefer to use random methods when drawing their samples, it is rarely practical. Instead they use a method involving every nth member of the population. This study compares the two methods. It was found that as long as the attribute being sampled is randomly distributed among the population the two methods give essentially the same results. However, if the attribute is not randomly distributed among the population the two methods give radically...

Topics: DTIC Archive, Sweetland, Anders, RAND CORP SANTA MONICA CA, *SAMPLING, DISTRIBUTION FUNCTIONS,...

A broad family of symmetric, thick tailed distributions, the small l- Laplace distributions, is described. These are natural generalizations of the Laplace distribution. A family of random coefficient Autoregressive Moving Average processes with small l-Laplace marginal distributions is constructed and its properties are explored. Extensions to ARIMA processes are considered. The first order autoregression with a standard Laplace marginal distribution is examined in detail and different...

Topics: DTIC Archive, Dewald, Lee S , Sr, NAVAL POSTGRADUATE SCHOOL MONTEREY CA, *DISTRIBUTION FUNCTIONS,...

The fourth year of the Prevention of Low Back Pain in the Military (POLM) clinical trial has been complete. The research team was able to complete all Year 4 tasks with the exception of completing primary data analyses. Study follow-up data collection was completed late in Year 4, thus requiring a no cost extension to allow for the statistical team to complete the analyses for manuscript preparation. In Year 4 the research team reported 1 platform presentation at a national physical therapy...

Topics: DTIC Archive, FLORIDA UNIV GAINESVILLE, *CLINICAL TRIALS, *SPINAL COLUMN, *PAIN, PHYSICAL THERAPY,...

If X and Y are random variables such that P (X Y) = 1 and the conditional distribution of Y given X is binomial, then Moran (1952) showed that Y and (X-Y) are independent if X is Poisson. This document extends Moran's result to a more general type of conditional distribution of Y given X, using only partial independence of Y and X-Y. This provides a generalization of a recent results of Janardhan and Rao (1982) on the characterization of generalized Polya-Eggenberger distribution. A variant of...

Topics: DTIC Archive, Alzaid,A A, PITTSBURGH UNIV PA CENTER FOR MULTIVARIATE ANALYSIS, *PROBABILITY...

Suppose the set x sub n is a p-th order autoregressive process with innovations in the domain of attraction of a stable law and the true order p unknown. The estimate of p,p-carat is chosen to minimize Akaike's Information Criterion over the integers 0,1,..., K. It is shown that p-carat is weakly consistent and the consistency is retained if K approaches infinity as N approaches infinity at a certain rate depending on the index of the stable law.

Topics: DTIC Archive, Knight, Keith, WASHINGTON UNIV SEATTLE DEPT OF STATISTICS, *REGRESSION ANALYSIS,...

Recently Church and Harris published a procedure for obtaining approximate confidence limits for P(X or = Y), under the assumptions that X and Y are independent normally distributed random variables. Their technique is illustrated by an application to a problem of determining the conditional probability that the sidewall of a combustible cartridge case, if ignited by smoldering residue after chambering, will be burned through prior to firing an artillery round in an automatic firing cycle. The...

Topics: DTIC Archive, Moore, James R, ABERDEEN RESEARCH AND DEVELOPMENT CENTER MD, *RANDOM VARIABLES,...

Renyi (1959) defined the maximal correlation rho between a pair of random variables (U,W) as a certain formula where the supremum is taken over all functions of U and W with finite second moments. In this paper we derive the asymptotic distribution of the estimate of the Renyi correlation coefficient based on a sample of independent observations under the assumption that (U,W) are independent and assume only a finite number of values. (kr)

Topics: DTIC Archive, Sethuraman, Jayaram, FLORIDA STATE UNIV TALLAHASSEE DEPT OF STATISTICS, *RANDOM...

An extreme point analysis has been performed on two natural definitions of positive quadrant dependence of three random variable. This analysis helps us to understand how much these two notions of dependence are different. Keywords: Upper positive quadrant dependence; Lower positive quadrant dependence; Convex set; Extreme points.

Topics: DTIC Archive, Subramanyam, K, PITTSBURGH UNIV PA CENTER FOR MULTIVARIATE ANALYSIS, *CONVEX SETS,...

Percentiles and linear combinations of order statistics are statistics which are sometimes preferred to averages because they can be less sensitive to the presence of a few wild observations. It is well known that for large samples, both percentiles and linear combinations of order statistics resemble averages in that the appropriately normalized statistic is approximately normally distributed, with parameters which depend on the underlying distributions. This paper shows that percentiles and...

Topics: DTIC Archive, Leurgans,Sue, WISCONSIN UNIV-MADISON MATHEMATICS RESEARCH CENTER, *ORDER STATISTICS,...

This paper discusses some problems connected with the concept of entropy. Keywords: Additivity theorems; Entropy; Information theory. Relative entropy is defined as h (xi:eta) + h(xi:eta) a measure of the random variables xi eta.

Topics: DTIC Archive, Rosenblatt-Roth, M, PITTSBURGH UNIV PA CENTER FOR MULTIVARIATE ANALYSIS, *INFORMATION...