Applied Mechanics and Materials Vols. 687-691

Abstract: The performance of GIS bus is directly linked with its heat radiation and temperature rise, and its long-time overheating may cause partial discharge and bus burn-up, posing a threat to the reliability of power system. This paper, based on heat transfer theory and taking into account convection and radiation heat transfer, builds the energy conservation equation and iteratively calculates the temperatures of the bus conductor and shell. The comparison of the calculation results with experimental data has confirmed the correctness of the calculation.

Abstract: This paper introduces the implement method of system ,direction finding array design, time delay estimation of terminal trajectory measurement system. To measure the elevation angle in a vertical plane, discusses the azimuth angle, elevation angle measurement method and error analysis of planar cross array, five element conical array, symmetrical three-dimensional four elements array. After simulation the paper pointed out the last two arrays are better for terminal trajectory measurement based short baseline array.

Abstract: Wireless Sensor Network (WSN) is becoming increasingly important for environmental monitoring.However, there is seldom applications that address the data sharing standard and interoperability among different applications.In this paper, we present a gateway system for wireless sensor network based on environmental monitoring. Resource sharing and long-distance accessing are important issues for application of wireless sensor network and environmental monitoring.

Abstract: MC9S12DG128 microcontroller as the core, designed a simple automatic resistance tester. Measuring range is 100Ω, 1KΩ, 10KΩ, 10MΩ four gears, accuracy ± (1% reading +2 word); From big to small scanning way, performing the basic measurement and automatic switching function, At the same time, automatically display a decimal point and unit. Key input module to complete the setup by screening resistance and errors, the microcontroller output PWM control servo rotation speed, in order to achieve different potentiometer speed control; Curve display module real-time displays the measured data, and the rotation angle of the potentiometer is displayed in graph form. Using the powerful function of LCD, display Chinese characters, to increase readability, improve the usability of tester. The system is cost-effective, high reliability, has a good application prospect.

Abstract: . For effectively using flight test data to extract drag coefficient, an optimal observer based on parameter estimation technique is proposed. The point mass dynamic equation is used to form the Unscented Kalman Filter (UKF) and the smoother (URTSS) for the estimation of a projectile’s flight states. The projectile flight states are then solved and utilized to extract the drag coefficient information using the observer techniques. The simulation verifies the feasibility of the method: with measurement noise, the accurate drag coefficient is obtained by using the smoother.

Abstract: Based on results of the supplementary feasibility study geological and geotechnical investigation of some hydropower project about the active fault, which is partly buried by thick quaternary soil and partly exposed fault that triggered the earthquake ( M7.6 ) of Kashmir in 2005, Comprehensive methods such as geological mapping, drilling, borehole TV, acoustic wave test and testing on-site, are applied, it ascertains location, strike (orientation and dips), width of affected band, approximate depth, properties and integrity of the rocks within the active fault, developing trend and distribution range of the active fault. Interrelations of different methods and advantages or disadvantages are discussed and analyzed, at the same time, key points, difficulties and working procedures during the geological and geotechnical investigations are summarized, lot of data, results and figures are offered and analyzed,these methods and procedures can be mirrored and inferred in the future similar project.

Abstract: In this study, qualitative and quantitative analyses of peanut oils adulterated with waste oil, soybean oil, corn oil and canola oil were performed by combining near infrared (NIR) spectroscopy with chemometrics methods. With NIR spectrometer, the spectra of 108 adulterated peanut oil samples were collected. The collected data were preprocessed with three different preprocessing approaches, including standard normal variate (SNV) transformation, de-trending (DT), and orthogonal signal correction (OSC). Backward interval partial least squares (BiPLS) was used to extract the characteristic wavelengths of the preprocessed data. On the intervals of the full spectrum and the characteristic wavelengths, support vector classification qualitative discriminant models and support vector regression quantitative analysis models were established. Experiments demonstrated that the established qualitative models could accurately determine the type of adulterant in peanut oil, with the accuracies on both the calibration set and the prediction set reaching 100%. With the quantitative models, the percentage of adulteration (3% ~ 55%) could be determined accurately, with correlation coefficients as high as 99.10%. All the models returned prediction root mean square errors lower than 6.96E-4. It was validated that the combination of NIR spectroscopy with chemometrics methods can realize the qualitative and quantitative detection of adulteration of peanut oil.

Abstract: Due to the existence of different grades of mineral in the mining area, the technology of slurry pipeline grade transmission is developing. However, the process of grade transmission will appear the phenomenon that the slurry of different grades are mixed. Therefore, before cutting into different grade slurry, we added special medium in pipeline to separate different grades of slurry. We worked out slurry pipeline transport model by mathematical modeling and building slurry pipeline transport real-time location tracking system. The system was able to distinguish different grades of slurry by adding special medium and tracking the actual location of the head and tail of slurry, realizing real-time position monitoring of different grade slurry.

Abstract: Smart wristband has recently emerged as one of the most popular smart wearable devices. With the help of smart wristbands, we can easily gather and record the user's data of everyday life including exercising, sleeping, diet, etc. In this work, we explore the feature of falls of the old and redesign the smart wristband to detect their movement. We propose a novel algorithm to judge whether he/she stops in a sudden, then produce vibrations through the man-machine interactive interface that provided by the smart wristband. The wearer can judge whether it is misjudged if he is still in conscious, if so he can press a button to stop the shaking or the wristband will give an alarm through communication interface to the medical care center.

Abstract: This paper combines methods such as decision-making theory and method, the risk early warning theory and mathematical statistics theory [1,2]. With case analysis, some risk assessment and risk early warning is studied systematically on the automatic low voltage current transformer verification system. First of all, on the basis of risk identification, a indicator evaluation system for the verification system is established. Combined with the structure of the low voltage current transformer verification system, the indicator system is built on both the overall system and various key units of the system. Then risk assessment of the system is conducted. The risk assessment includes state analysis on each indicator, setting up the indicator state probability model, setting the indicator weight; also a confidence level is analyzed. Thirdly, risk early warning is made. The risk early warning threshold is taken as the basis of the early warning, which guarantees the safety and steady operation of the system. Finally, some example verification is done upon the automatic low voltage current transformer verification system, which provides reference on risk assessment and early warning for some enterprises and institutions.