Decomposition in Optimum Structural Design
A general method for optimal elastic design of indeterminate structures by decomposition of the structure into separate subproblems is proposed. Both stiffness and flexibility method formulations...

Response of MDOF Systems to Nonstationary Random Excitation
Responses of linear, dynamic systems to nonstationary random excitation are calculated using a state formulation. Analytical expressions for evolutionary covariance matrices are derived...

Methane Migration Around Sanitary Landfills
Mathematical models have been developed to predict methane migration around sanitary landfills. The methane gas that is generated during the decomposition of refuse constitutes an explosion...

Buoyant Jet Discharges into Finite Ambient Waters
The paper presents the results of an experimental study regarding the effect of the lateral dimension of the receiving water on the spreading, mixing, and temperature decay of a horizontal...

Optimum Truss Geometry for Two Loading Conditions
Variable node coordinates are considered for the case of minimum weight design under two alternative loading systems of simple ideal trusses. Optimality Kuhn-Tucker conditions are derived...

Settling in Continuous Sedimentation Tanks
The widely used empirical relation for the exponential decay of sediment as a function of the overflow rate is given theoretical justification. Using the approach of Camp, who extended...

Optimum Choice of Determinate Methods Under Multiple Loads
An algorithm for choosing the least-weight statically determined configuration of a given truss under two loading conditions is presented. The procedure is based on modifying the optimal...

Transformation for Solving Linear Equations
This paper proposes an equation solving adjunct for improving the optimality of computer solution of many (thousands of) sparsely-populated linear equations. The paper provides a formal...

Decomposition Approach to Bus Network Design
This paper presents a decomposition approach to bus network design in which the task of network design is accomplished through the optimization of a series of subproblems. Bus routes are...

Factors Influencing Activated Sludge Properties
Activated sludge dewatering and thickening properties were found to depend upon the concentration of bio-polymers in solution. Sludge conditioning agents were found to function by coagulation...

Ocean Wave Statistics for 1961 North Atlantic Storm
Various statistical quantities for a random wave system are derived by different proposed means and compared to each other. A series of ocean waves recorded during a severe storm in the...

End Effects in Long Curved Beam
Eigenfunction solutions of the biharmonic equation have been used to investigate the Saint-Venant boundary region in a long curved beam of rectangular cross section. The participation...

Radial Dispersion Through Adsorbing Media
The convective-dispersion equation for the transport of a radioactive tracer through an adsorbing porous medium is solved in the cylindrical polar system of coordinates by the Galerkin...

Pressure Fluctuations in Submerged Jump
Mean velocities and pressures in the submerged jump downstream of a sluice gate have been investigated. The empirical relationship between the rate of expansion of the jet and the rate...

Operations Models for Central Valley Project
System optimizing procedures are being developed for on-line use in the operation of the Central Valley Project (CVP), a complex multiple objective water resource system, in California....

Equalization of Time Variable Waste Loads
Influent variability removals in plug flow, dispersion flow, and completely mixed basins with or without decay have been examined and mathematical models developed. The spectral analysis...

Transient Dispersion in Uniform Media Flow
Analytical solutions are developed for the transient dispersion from a finite line source or a rectangular plane source in saturated steady uniform porous media flow. The sources are oriented...

Stochastic Considerations in Thunderstorm Modeling
A mesoscale stochastic model of thunderstorm activity is developed to simulate the hourly development of both air mass and squall-line storms. This modeling technique is based on Poisson...

Multilevel Approach to Optimum Structural Design
The general problem of optimizing and node coordinates in structural design is formulated in terms of mathematical programming. The proposed two-level approach consists in decomposition...

Multistage Optimization of Structures
The design optimization problem is formulated as a multistage decision system by decomposing the structure into a series of substructures. The adoption of indeterminate forces as the state...

 

 

 

 

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