the current study is an attempt to contribute for efficient and cost-effective substrates for xanthan gum production. in this context, the sugar cane molasses wastes can be used as a cheap substrate for xanthan gum production. xanthan biopolymer production by a novel xanthomonas campestris strain ibrc-m 10644 was optimized with statistical approaches. based on the results of response surface me...

In this study we present a technique for the parallel optimisation of join queries, that uses the offered coarse-grain parallelism of the underlying architecture in order to reduce the CPU-bound optimisation overhead. The optimisation technique performs an almost exhaustive search of the solution space for small join queries and gradually, as the number of joins increases, it diverges towards i...

Most of the existing relational database query optimizers generate multi-way join plans only from those linear ones to reduce the optimization overhead. For multiprocessor computer systems, this strategy seems inadequate since it may reduce the search space too much to generate near-optimal plans. In this paper we present a framework for optimization of multiway join queries in multiprocessor c...

differential steering of in-wheel electric vehicle provides the functions of both active steering and power assisted steering with the coupling control of force and displacement transfer characteristic of system. a collaborative optimization model of the differential power-assisted steering system of in-wheel electric vehicle is built, with steering economy as the main system optimization goal,...

In this paper particle swarm optimization (PSO) is used for a design optimization of a linear permanent magnet synchronous motor (LPMSM) considering ultra low thrust force ripples, low magnet consumption, improved efficiency and thrust. The influence of PM material is discussed, too and the modular poles are proposed to achieve the best characteristic. PM dimensions and material, air gap and mo...

this paper describes optimization method that combines the plackett-burman design, a factorial design and the response surface method, which were used to optimize the medium for the production of l-asparaginase by serratia marcescens sb08. four medium factors, from out of 11 medium factors, were screened by plackett-burman design experiments and subsequent optimization process to find out the o...