Advanced Materials Research Vols. 490-495

Abstract: In the near-field acoustic holography, the parameter have an important effect on the reconstruction precision. As to the distance between the holographic plane and the source plane, there are the spatial resolution and the attenuation rule of evanescent wave which need to be considered. As soon as meeting the two demands the reconstruction result represent the sound pressure distribution of source plane. The simulation proves that the method can reduce the error of holographic reconstruction and improve the reconstruction precision.

Abstract: The barrel life is decided by explosive payload, tempreture, firing interval, ammunition type and other factors. Thus the zone charge’s auto-recognition is the first question to realize the automatic prediction technology of the barrel life. The zone charge’s recognition technology was proposed based on BP Network. The theory support could be provided by the technology to realize the zone charge’s auto-recognition.

Abstract: After the implement of ERP system in electric power enterprise, the enterprise's management had a great change. Financial management work, as an important part of enterprise management, the improving of the performance of it will have an important impact on the management of the whole enterprise competitiveness. This paper mainly analyzes the implementation effect of electric power enterprise ERP financial management. By constructing evaluation index system, using the AHP method to analyze it, and then have a conclusion that the quantitative evaluation results, what will have a strong boost role to the electric power enterprise ERP financial management work.

Abstract: As the represent of the new energy vehicles, electric vehicles dominate an irreplaceable position in solving energy crisis and protecting the environment. And some developed countries are investing heavily in the research and development of electric vehicles. In this paper, the domestic conditions of electric vehicles are introduced. And many topics about electric vehicle such as the prospect, industrial policies, key technologies and domestic charging network are further analyzed. Some thinking and suggestions relating to the development of electric vehicles are put forward at last.

Abstract: With the development of electronic media and the demand of human, speech communication becomes more and more diversified and important. Face-to-face Speech Communication(FSC) is the most basic form and the flourishing of Electronic Speech Communication(ESC) indicates rejuvenation of oral tradition. This paper aims at demonstrating the similarities and differences between FSC and ESC through literature review and observation. FSC is highly dependent on communication environment while ESC depend upon other non-verbal symbols which determine communicator’s image; in terms of communication content, both of them are full of characteristics of oral language, but have significant differences in information code and language regulation; From the perspective of emotion interaction, FSC pays more attention to face-work while ESC focuses on confrontation performance to create exciting point.

Abstract: In order to ensure that submersible has good performance of control , the kinematic model of underwater vehicle must be fairly accurate. At the same time, the accuracy of the kinematic model also is affected by hydrodynamic coefficients. Taking the underwater vehicle model as research object, the formula of the acceleration coefficient was deduced and hydrodynamic coefficients were calculated with the combination of theoretical and experiential formulas. Besides,the depth transfer function and heading transfer function were obtained. At last, we simulated the system and calibrated with PID

Abstract: Digital walkthrough technology has been widely applied in the city planning in resent years, while the existing techniques of digital walkthrough has the disadvantage of unitary operation and speech interaction deficiency. Based on the above analysis, aimed to overcome the conventional techniques disadvantage, the paper introduces the novel theory of virtual technology and voice control technology, researching the application of voice navigation in digital walkthrough designed and studied by combining the actual need of the city planning.

Abstract: This paper mainly researches the inverse problems of the electrical exploration results. Through the inverse calculation using genetic algorithm and conjugate gradient method, the model parameters and inverse curves can be obtained. In the paper, the exploration abnormal results of apparent resistivity are inverse analyzed under the anomaly condition of double-pole device of electrical exploration. The inverse results of the model and theoretical analysis are compared. The result indicates that genetic algorithm and conjugate gradient method can be used to obtain the inverse parameters of the exploration results, but the precision of the parameters is different in different geological conditions and methods.

Abstract: In the disassembling of ammunition screw parts, the explosion will happen when the ammunition parts heavily damaged by the screw driver. To solve the problem the synchronous backing principle is put forward, which is that the screw driver actively moves backward a screw pitch of the screw part when the screw driver turning a circle. According to the gap between the screw driver and the workpiece, the failure of the disassembly can be identified and the explosion can be prevented. Finally, a structure of the screw driver and the gap detection mechanism designed by the principle is suggested and some application examples are given.

Abstract: A new manipulator, designed by the authors, is used to push/pull the cartridge into/out of a drilling jig. It should carry out such actions as rotating, locking, unlocking and separating, etc. Cylindrical cam mechanism and spring steel ball mechanism are designed to fulfill the actions. To determine whether the design parameters are correct ADAMS is applied to the simulation analysis. The results illustrate that the manipulator can work reliably.