Advanced Materials Research Vols. 268-270

Abstract: To resolve the problem of data association between region and county level power-dispatching, the method based on REST web service is proposed. According to needs of power-dispatching data association, as well as the characteristics of security and real-time requirement, the REST basic concepts, objectives and design constraints are studied first, then the project of data association between two power-dispatching levels based on REST web service is designed and realized. And the practice showed that this method is feasible and meet the requirement of power-dispatching.

Abstract: A new variable step size LMS algorithm (CoLMS algorithm) based on two cooperative adaptive filters was proposed. In the CoLMS algorithm, the step size of each component filter was adjusted according to the comparison result of the two component filters’ performance at current stage. And the output of the better component adaptive filter was chosen as that of the overall adaptive filter. The CoLMS algorithm is not sensitive to the magnitude of the output noise and has a good tracking ability in the stationary or slowly changed environment. In order to further improve the tracking ability of CoLMS in abruptly changed environment, a modified CoLMS algorithm is also presented. The efficiency of the new algorithms is verified by the simulation results in system identification under the noises of different magnitudes.

Abstract: The LED illumination has extremely high luminous efficiency, which is5 or 10 times of incandescent, 2 times of the traditional energy-saving lamps and 1.5 times of high-pressure sodium lamp. It has been widely used in the lamp products of lighting and decoration. At present, the biggest problem that the LED lighting products facing is the stability and reliability of LED drive circuit. The paper tries to explore the scientific and technical standards and test schemes of LED drive technology parameters, which has a certain significance of improving reliability and safety of LED lighting technology.

Abstract: This fuzzy speed controller is designed and applied in induction motor drive systems. MATLAB software fuzzy logic toolbox is used to the single closed-loop induction motor speed control system for computer-aided design, and SIMULINK dynamic digital simulation is used to achieve optimal control parameters. Tests show that the fuzzy control process is overshoot, response time is short, the system oscillation amplitude is low, it is the optimum control strategy.

Abstract: The bee immune evolutionary algorithm was proposed in order to improve effectively the optimal ability of bee evolutionary genetic algorithm. In the evolutionary process of bee, the algorithm made on immune evolutionary iteration calculation, generate next-generation population, in the proportions of fitness values for the best individual and second-best individuals in each generation. Because the algorithm takes in the neighborhood of space search as well out the neighborhood of space search for the some optimal individuals, meanwhile, with iterative numbers increase, capability of local search can be strengthened gradually; the bee immune evolutionary algorithm can approach the global optimal solution with higher accuracy. The calculated results for typical best functions show that the bee immune evolutionary algorithm has better optimal capability and stability.

Abstract: In order to avoid premature convergence and improve the precision of solution using basic shuffled frog leaping algorithm (SFLA), based on immune evolutionary particle swarm optimization, a new shuffled frog leaping algorithm was proposed. The proposed algorithm integrated the global search mechanism in the particle swarm optimization (PSO) into SFLA, so as to search thoroughly near by the space gap of the worst solution, and also integrated the immune evolutionary algorithm into SFLA making immune evolutionary iterative computation to the optimal solution in the sub-swarm, so as to use the information of optimal solution fully. This algorithm can not only free from trapping into local optima, but also close to the global optimal solution with the higher precision. Calculation results show that the immune evolutionary particle swarm shuffled frog leaping algorithm (IEPSOSFLA) has the optimal searching ability and stability all the better than those of basic SFLA.

Abstract: A pineapple harvesting robot consisted of a manipulator arm, an end-actuator, a positioning identification device, a frame, a fruit box, a traveling mechanism and a control system was put forward. Four degrees of freedom, including X, Y, Z axis translations and a wrist rotation were required for pineapple picking. A cartesian-coordinate mechanism scheme for the manipulator arm was designed. A sliding-lever double-fulcrum structure was selected for the clamping mechanism of the end-actuator. The cutting device was designed. Pro/E software was applied for establishing 3-D parametric model of parts, assembling parts or components. By setting constraint relations among parts or components, general assembly model of the harvesting manipulator was built. Through several times of simulation with different motion parameters, repeated result analysis and dynamic interference check, optimized structure and working parameters of the pineapple harvesting manipulator was obtained.

Abstract: Electromagnetic tracking systems are often used to track location and orientation of an implantable medical instrument in the human body. This paper presents a 3D tracking system that is based on AC magnetic field transmitting and sensing. The concept and principle to detect position and orientation are introduced. Then the tracking behaviors for different degree-of-freedom (DOF) are investigated using finite element analysis. The tracking errors on the position and orientation accuracy are presented using the equivalent dipole field model and some improving measures are proposed, especially for the tracking at close region. We can find that using the finite element analysis to simulate the mutual inductance between transmitting and sensing coils is an effective method to research the tracking behaviors.

Abstract: To study the underlying mechanism of 20 (S)-Ginsenoside-Rh2 and 20 (R)-Ginsenoside-Rh2 inducing apoptosis of human lung adenocarcinoma A549 cells. In this study, cell death rate and cell survival rate were obtained using typan blue staining cell viability assay, and transmission electron microscopy was used to detect cell apoptosis. Meanwhile, IkappaB phosphorylation expression was analysed by western blotting. Results showed that after A549 cells were treated with 30 μg/mL 20(S)-Rh2 and 20(R)-Rh2 for 48h, cell death rate increased significantly compared with the control group (P<0.05), and nuclear condensation, fragmentation, karyopycnosis and apoptotic bodies were found under transmission electron microscope. There were no significant changes of IkappaB expression after treated with 20(S)-Rh2 and 20(R)-Rh2 (P>0.05). After treated with 20(R)-Rh2, p-IkappaB expression increased obviously between 4h-6h (P<0.05). After treated with 20(S)-Rh2, p-IkappaB expression increased obviously between 1h-2h (P<0.05), back to normal over time after 3h, increased significantly again between 4h-6h (P<0.05), which indicated the activation of IkappaB participated in A549 cell apoptosis induced by Rh2. These results demonstrated that 20(S)-Rh2 and 20(R)-Rh2 both have the functions of activating I-kappaB/NF-kappaB signaling pathway, thus promoting A549 cell apoptosis.

Abstract: Software Program of Water and Wastewater Network Optimization Was Provided and Was Applied in Petrochemical Enterprise. a New Water System Optimization Method Was Based on Mass Transfer Model of Water Pinch Technology, Evry Operation Used Matched Water of Circle Water and Fresh Water in Turn. Judgement Basis of Operation Sequence and Theoretical Basis of Selection of Water Source Was Put Forward. the Water Network Optimization Program of Matlab Language Was Edited and Applied in a Petrochemical Enterprise. the Result Showed that the Fresh Water Reduction Was 38.31% when the Optimization Method Was Used in one Water System Contaminanted by Sulfur with Nine Operations.