Advanced Materials Research Vols. 816-817

Abstract: The paper bases on the differential pressure signal measured by the differential pressure sensor for the study and measurement of gas-liquid two-phase flow void fraction. We compare theory section void fraction and practical section void fraction with superficial gas velocity, the theoretical derivation formula has been observed and qualitatively explained.

Abstract: At present, the interface system in IC equipment control software system has to be changed even when a small hardware change occurs, which increases the time and cost of system debugging. This is one of the technical problems needed to be solved in course of development of IC equipment control system software.Therefore, the characteristics of the semiconductor device in IC equipment which used the DeviceNet has been analyzed in this paper. Then one DeviceNet-Oriented interface system, which is capable of shielding the difference of the details of the hardware, has been designed and developed.

Abstract: Information systems had been built to meet the requirement of enterprise operations, But the ever-changing market environment leads to unceasing adjustment on enterprise goals, organization structure, business processes of telecommunication companies .The IT architecture should also be adjusted to meet the requirements of enterprise operations. This paper try to investigate on the method of build an evaluation model on IT architecture of a telecommunication company using Analytical Hierarchy Process (AHP). The evaluation of the IT architecture is based on a number of criteria (e.g. Completeness, effectiveness, compliance), Measurements need human judgments to estimate their importance and from that importance to develop order and measures priorities, but the pertinent data are difficult to be quantified. The Analytic Hierarchy Process (AHP) is an effective approach in dealing with this kind of decision problems. Based on experiential knowledge and also by the views of several experts, we can construct a hierarchy model for the evaluation, and a well researched methodology has been adopted for the synthesis of priorities and the measurement of consistencies.

Abstract: Since thermocouple has an intrinsic disadvantage that its signal is very weak, many problems usually appear such as large noise and low temperature resolution when thermocouples are being used. Aiming this defect on thermocouple measurement, this paper proposes a solution of analog circuit design that provides the character of low noise and high SNR. This paper discusses the analog circuit design and calculation based on the S-type thermocouple which is often used for a very wide temperature range. This designed module can be applied to measurement instruments.

Abstract: At present, in the field of education, there are more and more attention have been paid on the theory and practice of the autonomous and cooperative learning. The implementation of the cooperative learning mode has been in-depth studied, so as the role of teachers. By defining the conception of autonomous and cooperative learning, we combined it with the characteristics of civil engineering course to study the use in the civil engineering course. The application of cooperative learning in the teaching of civil engineering is necessary, and the result is also significant.

Abstract: The purpose of this selected topic is for researching and designing a 3D TV high-precision camera PTZ (Pan/Tilt/Zoom) in order to have the functions of Remote double machine level shift, ticket reservation in any angle rotation.In this communication module design, NEC encoding infrared remote control decoding chip is used as a source for the remote control signal to make it possible for a photographer, within 5 meters ,to send the infrared signal to the integration of the infrared receiving head. The Infrared signals contain such information as the stepper motor direction, the rotating ring number and the working state.

Abstract: The static characteristic and dynamic characteristic of machine tool is one of the most important factors that affect the performance of machine tool, and it will affect the manufacturing final performance of the machine tool, and it is also an important index to evaluate the machine tool of high performances. Based on finite element structure analysis software ANSYS, the analyses of static and dynamic characteristics of VDL-1000 were conducted. The influencing factors to working accuracy were pointed out and a way was proposed to improve the structure of the machine center. All these can provide an important theoretical basis for the design and optimization of the machine center.

Abstract: This paper proposes a new synchronized serial-parallel CRC(Cycle Redundancy Check) with PIE(Pulse Interval Encoding) decoding circuit for the UHF(Ultra-High Frequency) RFID(Radio Frequency Identification), which is based on the ISO/IEC 18000-6C standards protocol. The parallel algorithm of CRC circuit is derived, and the serial or parallel CRC circuit on RFID tag chip is evaluated in this paper. Finally, the designed circuit is simulated and analyzed on the FPGA platform. Simulation results show that the proposed circuit meets the communication requirement of the protocol and addresses the problem of low data processing rate of conventional serial CRC circuit, as well as implements 1 to 8 degree of parallelism of the parallel CRC circuit for UHF RFID.

Abstract: The rapid development of electronic financial services, attendant come an increasingly serious network security problem, especially electronic cash exchange network security issues facing the urgent need to resolve. In this paper, electronic cash scheme detailed research and analysis, and then design a secure electronic cash system based on an improved theory of electronic cash scheme, it includes detailed electronic payment requirements analysis, system design, e-commerce payment system design, server design and client design. Finance and electronics industry combining electronic financial system, if they can effectively solve the security issues, I believe it can be quickly developed.

Abstract: Based on technology of Internet of Things, an intelligent supervised system for housing is formed to monitor various parameters at home. This system adopts special sensors to sample the environmental data, and will send alarm information through the GPRS gateway to the mobile phone of the host once the data beyonds the allowable value. Through information exchange between host and the supervised system, people can check the real time information of home and commit intelligent control. This paper introduced the structure, the hardware and software design idea of the supervised system. Special designs ensure that the system has relatively low power consumption and can be easily used for housing supervision and control.