Advanced Materials Research Vols. 718-720

Abstract: The impedance of the inertance tubes which include the mass flows, pressure amplitudes and phase shifts between them at the inlet of the inertance tubes were measured by correcting the mass flows at the surface of the compressor piston. The experimental results are compared with the theoretical values based on simplified turbulent-flow thermoacoustic model. The wide range of impedance measurements with different inertance tube geometries and operating parameters enable us to summarize the general rules of their effects on impedance respectively, also the differences between the experiments and calculations can be used to modify the theoretical model.

Abstract: A new integrated system consisting of a testing machine, denominated Diaptometro, and of an algorithm for metallic materials identification via instrumented spherical indentation testing is presented. The identification is carried out by analyzing the experimental load – penetration depth curve ( curve) from shallow indentation tests, thus preventing any contact condition effects in the material properties estimation. Accuracy in the experimental data collecting and the curve representation were recognized to be the key factors at the basis of reliable and accurate estimations. A new equipment with accuracies of 0.075% and 0.1% for the penetration depth and indentation load respectively was specifically built-up, whereas a four-terms power expansion is proposed for modeling the curve in the identification procedure. Experimental validation campaigns confirm the effectiveness of the adopted solutions.

Abstract: Hardware-software subsystem designed for MOSFETs characteristic measurement and SPICE model parameter extraction taking into account radiation effects is presented. Parts of the system are described. The macromodel approach is used to account for radiation effects in MOSFET modeling. Particularities of the account for radiation effects in MOSFETs within the measurement and model parameter extraction procedures are emphasized. Application of the subsystem is illustrated on the example of radiation hardened 0.25 μm SOI MOSFET test structures.

Abstract: In this paper, the authors discuss the influence of touch trigger probe system on CMM measurement performance based on measurement experiment results. A ring gage and a plug gage finished in high accuracy are employed as test pieces and the measurements performed under the conditions of combining different extension bar and approaching speed. Two main types of errors, periodic component and high frequency undulation, are verified. Introduction of the extension bar may significantly aggravate the accuracy and reliability, especially, associated with a comparatively large approaching speed. In addition, from the discussions on the generation mechanism of the periodic error and high-frequency undulation, some worthwhile references to engineering applications are also derived.

Abstract: Logistics transportation mostly uses foam packing material, the harmless of their production process is the current research focus. Based on National Instrument data collection cardsignal conditioning module and sensors, this paper adopted computer technology to collect data from harmless logistics packaging foam production process, and concentrates on data testing and collection methods. Based on virtual instrument technology, we build a multi-channel universal data collection system. The system exhibits high acquisition efficiency. All of the collected data are the key parameters which are closely related to harmless logistics packaging production, moreover, these parameters are relatively easy to adjust and control in actual production process.

Abstract: For powder XRD measurement at a higher temperature, there is a great difference (ΔT) between the temperature (T) detected by a thermocouple in a specimen stage and the actual temperature (T_a) of the ceramic powder surface irradiated by X-ray. The BaTiO₃ ceramic powder was employed to make an temperature correction on heating in light of the change of the ~ 45º characteristic peak in the vicinity of its tetragonal-cubic phase transition point (T_C = 130 °C). The thermal relaxation of BaTiO₃ is considered. When the BaTiO₃ ceramic powder was measured at T_C, the phase transition occurred at T = 170 °C and ΔT was determined as 40 °C, which is 10 °C higher than that of the ceramic bulk. The error of temperature correction is less than ± 3 °C at T_C. The approximation of a linear dependency T_a - T was given as a temperature correction line between 25 and 130 °C (T_a here).

Abstract: In this paper, the merit and disadvantage of existing measurement methods for battery internal resistance are firstly analyzed. Then an online internal resistance measurement based on AC impedance method is proposed, which can increase the stability of the excitation source and enhance the performance of the filtered feedback signal. The method can be used to measure the small resistance of lithium-ion battery precisely. Experimental results show that the proposed method is accurate.

Abstract: Conventional security monitoring of civil aviation usually uses fixed cameras to acquire images. There are several reasons for these problems with performance including difficulties introduced in the information transmission, storage, and analysis stages of the process. Insect compound eyes offer unique advantages for moving target capture and these have attracted the attention of many researchers in recent years. This paper contributes to this research by proposing a new 3-3-2 processing mode and applying it in security monitoring of civil aviation. This mode effectively achieves moving target detection with large field of view and high real-time processing.

Abstract: This paper introduced a measuring soil sample triaxial volume displacement system that used position sensing detector.The system course of principle and development was maken a detailed statement. The study was carried through literature [12] existing shortcomings. The shortcomings of former system was mended in the new system .This system had a high measuring precision and reasonable design. This systems triumphantly developed will be applied in triaxial specimens local sheared and port restriction .This system have greatly applied foreground to study deformation localizing , come into being cut strip and measuring volume change of unsaturated soil.

Abstract: As we known frying oil belongs to waste oils when it has been excessive used, long time usage also cause serious effect. This paper chooses dragon fish oil which was fried 10 times excessively. We can extract the characteristic in absorption peak (323.391.443nm) of spectral absorption value as the dependent variable. Then build the interval partial least square model, Through the MATLAB, we can extract the optimum interval is 5 and the best factor of wavelength range is 7. Prediction of correlation coefficient for R is 0.998. By the cross validation verification Q₂₂=-0.3461<0.0975, we can get the establishment of PLS equation as Y₁, Y₂, Y₃. The model which we build can predict the content situation of characteristic absorption peak in frying oil effectively.