Many optimization problems in engineering require coupling a mathematical programming process to a numerical simulation. When the latter is non-linear, the resulting computer time may become una ordably large because three sequential procedures are nested: the outer loop is associated to the optimization process, the middle one corresponds to the time marching scheme and the innermost loop is r...

This paper describes and evaluates the profile-based optimizations in the Compaq C compiler tool chain for Alpha. The optimizations include superblock formation, inlining, commando loop optimization, register allocation, code layout, and switch statement optimization. The optimizations either are extensions of classical optimizations or are restructuring transformations that enable classical op...

Memory system usually consumes a signi cant amount of energy in many battery-operated devices. In this paper, we provide a quantitative comparison and evaluation of the interaction of two hardware cache optimization mechanisms (block bu ering and sub-banking) and three widely used compiler optimization techniques (linear loop transformation, loop tiling, and loop unrolling). Our results show th...

In this work we revisit the problem of solving multi-matrix systems through numerical large $N$ methods. The framework is a collective, loop space representation which provides constrained optimization problem, addressed master-field minimization. This scheme applies both to integrals ($c=0$ systems) and quantum mechanics ($c=1$). complete fluctuation spectrum also computable in above scheme, i...

ÐExploiting locality of references has become extremely important in realizing the potential performance of modern machines with deep memory hierarchies. The data access patterns of programs and the memory layouts of the accessed data sets play a critical role in determining the performance of applications running on these machines. This paper presents a cache locality optimization technique th...

The broadband capability of a DSL is dependant on the copper access network. Single Ended Loop Testing (SELT) is the most preferred and economical way in estimating the copper loop topology. The combined use of complementary code based Correlation Time Domain Reflectometry (CTDR) and Frequency Domain Reflectometry (FDR) for accurate loop topology estimation is presented in this paper. The advan...

Our work has been focused on developing a methodology for process control of bulk deformation—specifically, extrusion. A process model is required for control. We state the difficulties which exist with currently available models. An appropriate decomposition and associated assumptions are introduced which permit a real-time process model to be constructed via spectral approximation to solve th...

The methods of tolerance relation estimation on the basis of pairwise comparisons with random errors, in the case of multiple comparisons for each pair, are proposed in the paper. Each comparison expresses the number of common features of both elements or the number of their missing features. The assumptions made about distributions of comparison errors are very weak, in particular they may be ...

This work proposes a new multi-objective optimization technique for concurrent diminution of torque ripple with the regulation speed 75 Kilowatt, 8/6, 4-phase SRM based on double close loop, modified whale algorithm optimized fractional order proportional integral (MWAO FO-PI) control commutation angle controller. The system is analyzed and designed in MATLAB/SIMULINK environment. First, perfor...