Applied Mechanics and Materials Vols. 321-324

Abstract: Through the magnetic-thermal coupling of ANSYS, the finite element modeling (FEM) of induction heating of the easy-open-end die was completed and the distribution of the dies temperature was determined. Simulation results showed that the dies cylinder surface temperature was high and close to the center was low with a small difference in temperature of about 3°C. Both simulation and experiment results demonstrated the benefits of using induction heating which could guarantee rapid and even heating. This result meant that the dies height varies evenly and was easy to be controlled. The results supplied a strong theoretical foundation for the project of real-time control easy-open-ends notch height.

Abstract: Putaohua reservoir is the principal producing formation in the Daqing oilfield sanan block. The spatial distribution of single sand body is particularly important for the residual oil tapping in the middle-late stage of oilfield development. The paper studied sedimentary microfacies of Putaohua reservoir in the area, established high-resolution sequence stratigraphic framework of the area and a typical single sand body logging phase mode on the basis of logging features, finely portrayed single sand body type and spatial distribution on this basis, laied the solid geological foundation for the oilfield subsequent residual oil tapping, provided a scientific geosteering.

Abstract: Point bar reservoir is the key development object in the late stage of oilfield development at present. In this paper, numerical simulation is done on the basis of the point bar architecture in the modeling of the point bar. Through dynamic data generating simulated well history and acquiring X-unit splitting factor, history matching is done on this basis. The numerical simulation results reveal that oil saturation has belt distribution characteristics on the pane due to the lateral accretion interlayer affect to the oil-water displacement; injection wells transverse spread is limited by the lateral accretion interbed control; by lateral accretion interlayer updip pinchout control, the remaining oil is mainly located in the middle and upper part of the lateral accretion [1,2]. Because of the above characteristics, taking horizontal wells to develop the top remaining oil of point bar has been very good results. And it has been confirmed by the further results of the numerical simulation.

Abstract: A problem in which a given good has to be delivered from some origins to some destinations by means of a given fleet of trucks at minimum cost is discussed. For the purpose of solution the problem is split into two levels: the decision concerns the planning of trips and the vehicles needed to operate the trips have to be scheduled. The solution approach based on Lagrangean Decomposition is presented.

Abstract: As a formal modeling and analysis method, colored petri nets (CPN) fits to construct formal model for software/hardware system with lots of communication and parallel/synchronous sharing behavior. Then behavior analysis of system function and performance based on the CPN model can be unfolded to verify the system feasibility. The CPN model of a kind of new CMP architecture shared multi-channel L2 Cache (AUMCC) is constructed in this article. Processing simulating of instruction set is deeply penetrated on the AUMCC CPN model, and analysis based on simulating results well verifies the feasibility of AUMCC architecture.

Abstract: We discuss the empirical Bayesian estimation and the noninformative prior Bayesian estimation of Exponential parameter in the missing data occasion. By setting different prior distributions, we get different bayesian risks and compare the numerical simulation results through the MATLAB programming.

Abstract: Squid jigging machine is an important equipment in the oceanic squid jigging fisheries. In order to take centralized control of multi jigging machines, improve manufacturing efficiency, this paper introduce the centralized control circuit between PC and single chip microcomputer for the communication within multi jigging machines by the way of RS-485 bus in detail, and we focus on describing the design of the hardware circuit for the centralized control system. The master is PC while the slave is MCS-51. The communication between them is realized by the MSComm control in VB6.0. It researches practicable ways to improve the reliability of RS-485 bus system, respectively from different aspects such as bus conflict, burst interference, common mode interference and nodes fault and so on. This study provides reference data for the researchers.

Abstract: Three-phase voltage source PWM rectifier generally adopts double closed loop control system. According to the high frequency characteristic of three-phase voltage source PWM rectifier, this paper put forward the setting method of current inner ring regulator and voltage outer ring regulator PI parameter. Finally, it is verified by simulation.

Abstract: This paper deals with the finite-time chaos synchronization of the new chaotic system [with uncertain parameters. Based on the finite-time stability theory and adaptive technique, a controller has been designed to realize finite-time chaos projective synchronization and parameter identification. Moreover, numerical simulation result is included to demonstrate the effectiveness and feasibility of the proposed synchronization scheme.

Abstract: The geometrical element chain method (GECM) is a tolerance analysis approach based on parametrical driving theory, with the principle of functional dimension driving being its key theore-tical basis. Currently, the functional dimension driving theory cannot cover the implicit constraints and the geometrical constraints in the 3D models, thus the application of GECM has been limited. To solve this problem, this paper presented the concept of virtual constraint model (VCM) of the pro-ducts 3D models, and constructed the algorithm of tolerance analysis oriented to VCMs to extend the application scope of GECM. Firstly, the mapping matrix between functional dimension set and the modeling parameter set was constructed, and a necessary and sufficient condition of the existence of the mapping relation was given. Secondly, the concept of VCM was put forward, and the tolerance analysis algorithm of the VCM was constructed. Finally, an example was given to illustrate the validity and effectiveness of the approach in this paper.