Applied Mechanics and Materials Vol. 340

Abstract: To liberate labors and enhance the reliability and accuracy of test analysis results, an automated analysis approach for tests of hydro-turbine generator sets was proposed. This approach was consisted of three procedures, that is, test items automated identification, test data automated record and analysis, and test reports automated generation. At first, the test items were automatically identified; then the test data was recorded and the performance indices were calculated automatically when the test items ended; at last, the test reports were automatically generated in accordance with the fixed contents and styles.

Abstract: In this paper, the application of a FPGA-based large-screen and high-resolution display accelerator technology in full-automatic textile machinery (computerized flat knitting machine) is studied. The design of traditional computerized knitting machine system is difficult to support the display of large screen and high resolution operating interface. Therefore, a displaying accelerator is designed in this paper. It comprises of FPGA, configuration chip, SDRAM and LVDS transmitter chip, is located between the embedded main processor and high resolution TFT LCD screen of computerized flat knitting machine, and implements the modules such as display acceleration logic and SDRAM controller relying on Verilog HDL programming in FPGA. The computerized flat knitting machine, applying displaying acceleration technology, can present its dynamic color interface on an 800 x 600 resolution TFT LCD (10.4") on the condition that real time, reliability and cost can be ensured.

Abstract: At present, more and more tennis players use forehand drive play to carry out important tennis match in the tennis sports. In order to better tennis forehand pumping ball to understand technical motion analysis, the use of tennis forehand drive action to carry on mechanical analysis. Through the theoretical mechanics analysis of tennis forehand drive, to select our country excellent tennis players carry out tennis forehand drive experimental mechanical analysis, at the same time, tennis players use the forehand drive movement structure and the comprehensive effect of smoke ball for the different rotation tennis of forehand out, which can obtain the mechanics characteristic of tennis athletes forehand drive technology movement that conduce to tennis players' attack and defence skill training.

Abstract: Mechanical drive is commonly applied to mechanical engineering, and also is often used as the transfer power of mechanical equipment or a basic form of normal motion. Meshing drive is an important component of the mechanical drive system, gear is the core component of the meshing drive, and the efficiency of the meshing drive can be greatly destroyed by gear failure. In this paper, the characteristics of meshing drive is first introduced, and then the common gear failure forms are analyzed,and accordingly the methods of improving the processing technology of gear components are proposed. It is expected that the follow-up studies can be helped and inspired by this paper.

Abstract: The comber equipment is essential for high-count yarn textile of the enterprises spun. It is an effective means to enhance the quality of the yarn, to adjust the industrial structure, to increase the added value of yarn, and to enhance the competitiveness. Currently, there is a gap between the domestic combers with world leading level. The article describes the technical characteristics of the domestic high-speed Comber and technological innovation, and focuses its network promotion display and the application.

Abstract: The well casing damage is common during the oilfield exploitation .Analysis on casing damage in a wide range , especially in the late term of exploitation ,indicates that the major influence factors which lead to wide-range casing damage are water injection pressure , block pressure differential and water soaked area .We conclude several types of abnormal strata pressure distribution which are common existing after water injection .These analysis are good preparation for monitoring and take precaution against casing damage .It has significant benefits for prolonging oil and water well casings serviceable life , as well as sustainable and stable production.

Abstract: In this paper, it is proposed that the simplified calculating method of equivalent beam of assembled type steel truss bridge's deflection. The use of finite element analysis software, the common span bridge's deflection is calculated. It is provided that the maximum deflection of assembled type steel truss bridge is approximately proportional to the span's cube through numerical analysis, and it has a linear relationship with the maximum deflection of equivalent beam. The space equivalent coefficient is introduced; the space problem is converted into a plane problem. The relational expression between assembled type steel truss bridge and equivalent beam has a fitting while to be strengthened or not strengthened. Therefore, it is provided a simple and feasible method for similar assembled type steel truss bridge's deflection calculation.

Abstract: STI (Systolic Time Interval) is one of the methods of non-invasive determination of cardiac function, which applies ECG, PCG and central artery putsation to synchronize photographic record and determine STI indicators. STI is both consistent both with cardiovascular angiography examination results, but also well related to directly measured hemodynamic parameters, which has laid a foundation of theory and practice for the wide application of STI. This thesis gives a regular summary and research analysis of the STI change characteristics of different groups.

Abstract: The single layer of the sand body in TA112 field is thin, changing, and complex. Therefore, to accurately predict sand body by using seismic data, the frequency band of it is narrowed with HFE algorithm, the pre-stack data of low dominant frequency is expanded in frequency. The dominant frequency is increased from 45 Hz to 75 Hz, and the bandwidth is expanded from 10 Hz~65 Hz to 10 Hz~125 Hz. Through a comprehensive interpretation on seismic and geological data, the vertical resolution of seismic data, the vertical fitness to sand body, the fitness to the plane distributed sand body, the fitness to the evolution law of sand body are verified and checked. As a result, it is known that pre-stack frequency expansion seismic data is of clear geological significance and can better reflect the changing law of sand groups, and also it is better than the data before frequency expansion and can meet the needs of the oil field exploration and development to a certain extent.