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This paper studied the effect of microbial species grow speed(MPGS), soluble microbial populations(SMPs) on the excess sludge production in the oxic-settling-anoxic process (OSA process), a modification of conventional activated sludge process by inserting a sludge holding tank in a sludge return line. The OSA process may provide a cost-effective way to reduce excess sludge production in activated...
According to the need of industrial and agricultural production and living, we introduce “scatter sequence” of a regular triangle and build an optimization design model to maximize the minimum scatter numbers. Based on LINGO software, we obtain the solution of the minimum scatter numbers and their coordinates in some “scatter sequences” of the regular triangles with different numbers of points and...
On the basis of a research on the advantages and disadvantages in the international management of Chinese medium-sized and small enterprises (SMEs), the author analyzes the problems existing in Chinese SMEs' present strategy and discusses a new path-the superiority base on the proprietary brand-for the international management of Chinese SMEs in consideration of the new economic features.
In order to reduce production cost of Pseudomonas aeruginosa T1, which has the ability of producing the biosurfactant when using crude oil as the sole carbon source, Three experimental methodologies (Plackett-Burman design (PBD), steepest ascent design (SAD), Central composite rotatable design (CCRD)) were applied to optimize the medium ingredients of the strain. In the verification experiment, the...
An optimizing model for studying production- inventory policy with service level constraints is proposed. To realize the integrative decision of service level and production point, the service level in a supply chain is defined as the probability of satisfying product demand in each planning period. Inventory variation under stochastic demand is analyzed, and the average inventory in each planning...
Production and inventory problem has attracted a great deal of attention. This problem concerns the determination of reproduction point in the production system. And the optimal solution to the problem is the (s, S) policy with different values for each period in the time varying demand situation This study develops an optimal production policy for shot life cycle products with a declining price....
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