Advanced Materials Research Vols. 271-273

Abstract: Because very high or low velocity tracking will influence on product quality, velocity tracking must be proper high. So Controller of tall requirement is putting forward, we achieve veloctiy control requirements with model predictive control, get predictive control model and simulation curve to increase control efficiency.

Abstract: The paper gives the hybrid computational intelligence learning algorithm with global convergence, which is combined by BP algorithm and genetic algorithm. This algorithm connects the strengths of the BP algorithm and genetic algorithms. It not only has faster convergence, but also has a good global convergence property. The computer simulation results show that the hybrid algorithm is significantly better than the genetic algorithm and BP algorithm.

Abstract: Resource scheduling is the key port of cloud computing resource management. One excellent method may enhance the efficiency of the whole cloud computing system, and effectively share resource in wide area. Genetic Algorithm has adaptability, global optimization ability and implicit parallelism, which is not in other methods. For the sake of scheduling effective resource to accomplish relevant task, improved genetic algorithm is adopted in cloud computing resource scheduling research. Finally, a simulation based on cloudsim is carried out, which proves the correctness and validity of the scheduling method mentioned in this paper.

Abstract: Traditional viewshed analysis method is usually based on datum plane and local space area, which can not meet the accuracy requirement of the viewshed analysis on 3D Virtual Earth based on datum sphere and large space area. Regarding this, the article discussed a new method of viewshed analysis based on 3D datum sphere, and also realized the real-time visualization of the analysis result based on the 3D Virtual Earth system GeoGlobe. Finally it inspected and verified the validity of the method.

Abstract: This paper introduces a mechanical product intelligent design platform. It presents a product information representation model, gives out the store structure, retrieving process of product cases and the usage of their knowledge for a new design. Finally, it gives an example of product design using this method, proving that it is quite good for product rapid responding design to meet fast changing market requirement and customer’s individual demand.

Abstract: Based on a series of single factor experiments, response surface methodology was employed to predict optimum conditions for domestication of lactic acid bacteria to prepare jujube lactic acid fermented beverage. A central composite design involving jujube puree content, fermentation temperature and inoculum size was used, and second-order model for viable biomass was employed to generate the response surface. The optimized conditions were as follows: jujube puree content 71.85 %, fermentation temperature 41.57°C and inoculum size 3.66%. The predicted viable biomass under the conditions was 3.099×10⁸ cfu/mL. The practical conditions were modified as follows: jujube puree content 72 %, fermentation temperature 41°C, and inoculum size 3.7% (fermentation time 8 h).Experimental verification gave the value of 2.99×10⁸ cfu/mL.

Abstract: The effects of different prescriptions on the sensory evaluation of jujube beverages were investigated with the method of fuzzy comprehensive evaluation, in which taste, color, flavor, and body were taken as the evaluation factors with proper weights. The results showed that the fuzzy comprehensive evaluation method could differentiate the grades of different products objectively and accurately. The optimum prescription was found as follows: fermented jujube puree of 90%, sugar of 8%, honey of 0.5%, citric acid of 0.15% as well as proper compound stabilizer.

Abstract: In this paper, we proposed a predator-prey system incorporating Rosenzweig functional response and prey refuges. We will consider the stability property of the equilibria. Our results show that refuges using by prey have stabilizing effect on the considered system.

Abstract: The basic form of Duffing equation is firstly analyzed in this paper; and then, it describes the principle of weak signal detection based on the change of phase trace. In view of some key questions existing in weak signal detection based on chaos, a new system is put forward, which detects weak signal utilizing chaotic synchronization characteristics. Utilizing the system, the critical problems of existing in weak signal detection based on chaos can be solved, and that, a imitation experiment validates the project, as a result, the research in the paper provides the foundation of putting chaotic synchronization into practice application to weak signal detection.

Abstract: Based on the method of LST/QST improved in the molecular orbital DMol³ program, with the aid of the minimum energy path (MEP) in the climbing image nudged elastic band (CI-NEB) method, the Oh-Al₁₃ cluster is investigated under different synthesis process, i.e. Al₆+Al₇→Al₁₃. The results show that: there are two stages in the synthesis reaction: the distortion stage and the configuration revolution stage. In the first stage, the metastable structures are forced to change into stable structures. In the configuration evolution stage, two different cases exist. For the synthesis of crystal clusters it is an automatic exothermic reaction if all reactants being of typical crystal symmetrical elements, i.e., Al₆+Al_7M®Oh-Al₁₃. While an energy barrier must be overcome if one of reactants having fivefold or tenfold symmetrical axes, i.e.,Al₆+Al₇、Al_6M+Al7 and Al_6M+Al_7M . So the five-symmetry structures are only appearing in rapidly solidified processes except crystallization processes.