DEPENDENCY OF THE INFLUENCE OF INPUT PARAMETERS OF BVI MODELS ON THE INITIAL EXCITATIONS AND SPEED RANGES

Bridge vibration due to traffic loading has been subject of extensive research in the last decades. Such studies are concerned with deriving solutions for the bridge-vehicle interaction (BVI) and analyzing the dynamic responses considering randomness of the coupled model’s (BVI) input parameters and randomness of road unevenness. This study goes further to examine the effects of such randomness of input parameters and processes on the variance of dynamic responses in quantitative measures. The input parameters examined in the sensitivity analysis are, stiffness and damping of vehicle’s suspension system, axle spacing, and stiffness and damping of bridge. This study also examines the effects of the initial excitation of a vehicle on the influences of the considered input parameters. Variance based sensitivity analysis is often applied to deterministic models. However, the models for the dynamic problem is a stochastic one due to the simulations of the random processes. Thus, a setting using a joint meta-model; one for the mean response and other for the dispersion of the response is developed. The joint model is developed within the framework of Generalized Linear Models (GLM). An enhancement of the GLM procedure is suggested and tested; this enhancement incorporates Moving Least Squares (MLS) approximation algorithms in the fitting of the mean component of the joint model. The sensitivity analysis is then performed on the joint-model developed for the dynamic responses caused by BVI

Hydraulic model study of the Morning Glory Spillway for Dillon Dam

CER59SSK21.June 1959.Includes bibliographical references

Highways in the river environment, hydraulic and environmental design considerations: training and design manual

CER 73-74EVR-SK-KM-DBS-MAS49.September, 1974.Includes bibliographical references.1. Introduction -- 2. Open channel flow -- 3. Fundamentals of alluvial channel flow -- 4. Fluvial geomorphology -- 5. River mechanics -- 6. River stabilization, bank protection and scour -- 7. Needs and sources for data -- 8. Hydraulic and environmental considerations of highway river crossing and encroachments1. Introduction -- 2. Open channel flow -- 3. Fundamentals of alluvial channel flow -- 4. Fluvial geomorphology -- 5. River mechanics -- 6. River stabilization, bank protection and scour -- 7. Needs and sources for data -- 8. Hydraulic and environmental considerations of highway river crossing and encroachment

Comparison of a coaxial focused laser Doppler system in atmospheric measurements, A

CER71-72SK35.June 1973.Includes bibliographical references (page 81).Final report.Prepared under National Aeronautic and Space Administration contract no. NASB-26234 Marshall Space Flight Center Huntsville, Alabama.Circulating copy deaccessioned 2020

Progress report on hydraulic model study of spur dikes for highway bridge openings

CER59SK2.January 1959.Prepared for U.S. Department of Commerce, Bureau of Public Roads, Division of Hydraulic Research, Washington, D.C

The Islamic Creed Is A Rational ‎Belief That Instinctively Leads ‎Humanity and Calls for ‎Psychological Stability

Man had come to the earth as a worshipper and successor to Allah. The faith in Allah and worshipping ‎Him represent a means of spiritual and psychological balance. This research aims at explaining the ‎feeling of human being and faith in Him for the biological viewpoint which represents the instinct ‎based on the concept of the (DNA) which scientists have declared the description of its symbols in the ‎year 2000. In addition to clarification that faith in Allah is a reasonable logic, according to the theory of ‎the Swiss (piaget) concerning cognitive development which explains the development of human ‎thought from a sensual materialistic thought to logical thinking, then to abstract one.‎In considering of faith that Allah is alone as creator and a source of power and capacity, that ‎agrees with instinct and accepted by reason. So such faith which is the core of Islamic belief ‎wipes out sources of disturbances and psychological diseases and represents the sole ‎guarantee for psychological balance and happie

Estimations maximales pour l'opérateur de Fokker-Planck avec champ magnétique

We consider the Fokker-Planck operator with a strong external magnetic field. We show a maximal type estimate on this operator using a nilpotent approach on vector field polynomial operators and including the notion of representation of a Lie algebra. This estimate makes it possible to give an optimal characterization of the domain of the closure of the considered operator.On considère l'opérateur de Fokker-Planck avec un champ magné-tique extérieur fort. On montre une estimation de type maximale sur cet opérateur en utilisant une approche nilpotente pour des opérateurs polynômes de champs de vecteurs et en incluant la notion de la repré-sentation sur une algèbre de Lie. Cette estimation permet de donner une meilleure caractérisation du domaine de la fermeture de l'opérateur considéré

Flow and torque characteristics of Rockwell Permasphere valves with large discharges

CER64SSK23.June, 1964.Prepared for the Rockwell Manufacturing Company, Pittsburg, Pennsylvania