Advanced Materials Research Vols. 121-122

Abstract: A 3-DOF simulation turntable with perpendicular errors is introduced. The characteristics of period and variation in the perpendicular error are liable to bring about orientation error, which is a function of the overall static inaccuracy. Aimed to compensate orientation error, a perpendicular error calibration method is proposed to measure the perpendicular error between the axis and the bushing of a rotating axis in simulation turntable. Based on transformation matrix, gesture transformation matrix with various error items is achieved. As a result of this analysis, perpendicular error analysis is carried out when this measurement result is applied to a simulation turntable. Furthermore, this study also permits the user to know how to minimize some error sources of the simulation turntable.

Abstract: Many errors including perpendicular error influence the accuracy of simulation turntable, which is a crucial equipment in hardware-in-the-loop simulation system. The aim of this paper is to propose a new method of perpendicular error motion separation of rotating spindle on a simulation turntable. Based on transformation matrix and small angle approximation, gesture transformation matrix with various error items is achieved. As a result of this analysis, perpendicular error analysis is carried out when this measurement result is applied to a simulation turntable. Furthermore, this study also permits the user to know how to minimize some error sources of the simulation turntable.

Abstract: The classification and recognition of ECG are helpful to distinguish and diagnose heart diseases, which also have very important clinical application value for the automatic diagnoses of ECG. The traditional recognition methods need people to extract determinant rules and have no learning ability so that they are unable to simulate the intuition and fuzzy diagnoses function used by doctor very well. The neural network technology has strongpoint of self-organization, self-learning and strong tolerance for error. It provides a new method for the automatic classification of ECG. In this paper, we use BP neural network to do automatic classification for five kinds of ECG which are natural stylebook, paced heart beating, left branch block, right branch block and ventricular tachycardia. The average recognition level is 98.1%. Experiment results show that the neural networ k technology can greatly improve the recognition level of ECG. It has good clinical application value.

Abstract: This paper discusses the design, fabrication and testing of a centrifugal rotor permanent magnet synchronous generator. The roller of the engine and the shell of the centrifugal outer rotor of the generator are designed together. The permanent material and the fixing block are fixed on the shell of the outer rotor. the centrifugal force increase with the rotate speed increase, so, the permanent material will not be damaged at high speed, and the reliability of the generator is improved. When the rotor turns, the magnet field turns, the generator generates electricity,with the permanent magnet material of high remnant magnetic induction and the optimized design of the generator, the output voltage is improved when the engine at low speed. We develope a single-phase double half-wave electric regulator is to ensure the stability of the output voltage and can direct output direct current.

Abstract: In connection with Problem (P) with both the equality constraints and inequality constraints, we introduce a new augmented lagrangian function. We establish the existence of local saddle point under the weaker sufficient second order condition, discuss the relationships between local optimal solution of the primal problem and local saddle point of the augmented lagrangian function.

Abstract: The generalized positive definite matrix is an active research field of special matrix, they have applied in computational mathematics, economics, physics, biology, applied mathematics, numerical computation, signal processing, coding theory, oil investigation in recent years, and so on. In this paper, motivated by [3], we give a simple and convenient judging methodwhich can be used to judge whether an nonnegative real matrix A is an generalized positive definite matrix or not.

Abstract: In this paper, We consider nonlinear optimization problem with equilibrium constraints where the constrained conditions with uncertain. We transform the original constrained into the equality constrained.

Abstract: The polymer air drawing model of polyamide melt blown nonwoven fabrics is established. The predicted fiber diameter coincides with the experimental data. The effects of the processing parameters on the fiber diameter are investigated. It is found that smaller polymer flow rate, higher initial polymer temperature, larger initial air velocity and larger die-to-collector distance can all produce finer fibers while too high initial air velocity and too large die-to-collector distance contribute little to the polymer drawing of polyamide melt. The results show great perspective of this research in the field of computer assisted design of the melt blowing technology.

Abstract: Waste minimization opportunities could be of great importance for decreasing the waste pollution load and production costs. A formulation of multi-objective optimization problems is proposed for the optimal design of chemical processes with waste minimization. As an illustrating example, a problem of optimal design of multipurpose chemical processes was solved. The approach developed is shown to be effective for solving problems of optimal design of chemical processes with waste minimization.

Abstract: This paper introduces a leakage reduction technique using dual threshold CMOS in CPAL (complementary pass-transistor adiabatic logic) circuits to reduce sub-threshold leakage dissipations. The leakage current source of the CPAL circuits is analyzed under nanometer CMOS processes. A 32 X 32 CPAL register file is demonstrated using the proposed dual threshold technique. In the proposed register file, the logic gates on critical path use low threshold transistors, while the other logic gates use dual threshold technique to reduce their leakage dissipations. All circuits are verified using HSPICE in different processes, threshold voltages, and operation frequencies, and BSIM4 model is adopted to reflect the leakage currents. Simulation results show that leakage losses are obviously reduced both in active mode and idle mode.