Abstract: An arrangement for a multiprocessor RISC system enables each CPU of the system to test the control logic of its cache by indirectly examining states of the caches and comparing those states to predetermined valid cache states of the system. The arrangement includes a plurality of processes configured to acquire information from selected block entries of the caches. The information is then compared with an array of predetermined valid cache states contained in a state table to detect invalid cache states. A cache examining protocol defines the operational procedures followed by the processes when acquiring and examining the information.

Abstract: The method allocates a demanded amount of power to a plurality of power output apparatus, each power output apparatus having an emissions curve associated therewith, such that each of the power output apparatus supplies a portion of the demanded power, and the total power outputted from the plurality of power output apparatus results in a minimum amount of emissions. Data is entered for each of the power output apparatus into a controller. Optimal solutions are generated for all valid possible output power demands using an optimization by parts technique within output power bounds of each of the power output apparatus. The solutions indicate the portion of power each power output apparatus is to supply to provide the total power demanded at minimal emissions output. The solutions are stored in tables within a storage unit of the controller. Upon receipt of a demand for power, a search is performed of the solution tables to obtain the amount of power each power output apparatus is to supply to meet the demand.

Abstract: A method and apparatus for simulating a mechanical operation is based on the finite element method and uses a particle flow model. Evaluation of contact boundary between a die and a material and remeshing operation are unnecessary. Particles (6) are moved on fixed elements to change material properties therein. The elements per se are not deformed.

Abstract: The method allocates a demanded amount of power to a plurality of power output apparatus, each power output apparatus having characteristic curves associated therewith, such that each of the power output apparatus supplies a portion of the demanded power, and the total power outputted from the plurality of power output apparatus results in a minimum cost for generating the power as a function of a plurality of constraints. Data is entered for each of the power output apparatus into a controller. Optimal solutions are generated for all valid possible output power demands using an optimization by parts technique within output power bounds of each of the power output apparatus. The solutions indicate the portion of power each power output apparatus is to supply to provide the total power demanded at minimal cost and emissions output at or less than predetermined levels. The solutions are stored in tables within a storage unit of the controller.

Abstract: All N parameters of an induction machine equivalent circuit may be determined by providing a stator voltage such that the induction machine produces no torque, measuring a stator current for at least N-1 frequencies, determining the tangent of the angle .phi. between the stator voltage and stator current at said frequencies, and solving N-1 equations R(.omega.)tan.phi.+X(.omega.)=0, given one of the parameters, said frequency values and said associated values for tangent .phi., where R(.omega.) and X(.omega.) are the real and imaginary components of the complex stator impedance of the induction machine.

Abstract: A method in accordance with the invention is implemented via a computer program to determine the density and water (or other fluid) content of the various layers within a multilayer system. For convenience, the program is referred to as SIDARS. A conventional ground penetrating radar (GPR) system is used to obtain digitized images of a reflected radar signal from a multilayer pavement system. From these images standard mathematical techniques are applied to determine the number of layers, the thickness of each layer, and the dielectric constant for each layer within the multilayer system. SIDARS takes advantage of the fact that each layer is itself composed of three distinct types of material: solids, fluids, and gases. Thus, the dielectric constant obtained for a layer is in fact a composite value, namely a combination of the layer's solid, fluid, and gas dielectric constants. SIDARS employs a wave propagation model of the pavement system to generate a synthetic reflected radar signal.

Abstract: A configuration register enables built-in testing logic during testing operations, and disables the testing logic during non-testing operations. When enabled, the testing logic is in a normal state, and when disabled the testing logic is in a low power state. The configuration register generates a control signal to the testing logic, the control signal being is responsive to signals received at a key input and a reset input of the configuration register. When the reset input of the configuration register is triggered, the control signal drives the testing logic to the low power state. When a signal matching a predetermined data pattern is applied to the key input, the control signal drives the testing logic to the normal state.

Abstract: A method for deriving a piecewise-linear model which comprises measuring the behavior of a desired characteristic of an object. Recording the observations in a computer memory. Creating a piece-wise linear model of the observations based on the highest and lowest valued observations. Computing an error value for the dependent variable of each observation based on the piece-wise linear model. Determining a new piece-wise linear model based on two segments by interpolation. Recursively repeating the steps of computing error values and determining an improved piece-wise linear model until a predetermined acceptance condition is achieved. Performing a computer simulation of the desired characteristic of the object using the improved piecewise-linear model.