Applied Mechanics and Materials Vol. 455

Abstract: Master-slave P2P mapping principle proposed in our previous work [ is a semantic P2P mapping paradigm with modularity and loosely coupled characteristics. The intent of this paper is to define a common case study of this paradigm for the semantic information integration. The domain of the case study is a semantic P2P information integration system called SGII[, i.e., system that help in information coordinating and interoperating by orchestrating the content and formalization expression of master-slave P2P mapping between elements from different peer node models which represent the data exposed (shared) by data sources. Furthermore, an illustrative example of master-slave P2P mapping paradigm is given to explain how the mappings are implemented and to demonstrate the paradigm can hence be applied in semantic information integration scenarios.

Abstract: A dynamic traffic information system is an essential component of an intelligent transportation system. Mobile mapping system (MMS) is a new technique that can be used to improve capability of the information gathering. Article describes the measurement system based on mobile mapping system increased relevant software and hardware that can be used to collect maintenance information of traffic sign. Build a dynamic traffic sign maintenance information system with the function of rapid acquisition and analysis, these improve the accuracy and immediacy of traffic sign maintenance information processing.

Abstract: This paper describes a newly developed set of Barkhausen noise testing system including magnetizing and pick-up coils and the subsequent data acquisition unit based on the generation mechanism of Barkhausen noise. We studied the intensity of magnetic Barkhausen noise (MBN) of 16MnR steel under different states of stress by tensile test of flat-shaped specimens.

Abstract: Scanning acoustic microscopy (SAM) is a powerful non-destructive testing tool used in the field of electronic package, micro-and nanomaterial and medication. The capability to distinct how minimum of defect is very important to detect the flaw in electronic packages. The detection resolution of SAM depends on the frequency of ultrasonic focus transducers. In this paper, the Multi-Gaussian Beam model to simulate the sound field of the focused transducers is discussed. Mainly the frequency domain imaging algorithm and 2D-Deconvolution method for better image quality and high resolution is analyzed. Finally, the calibration experiments for the detection resolution of 100MHZ transducer is carried out. In addition, the micro flaws with different dimensions are observed at different defocusing location. It is concluded that the detection resolution decreases with the deviating from focus plane, so the flaws should be sensitive on the focus area by precisely controlling the vertical position for better detection resolution.

Abstract: This paper reports the acceleration effect of a type of piezoresistive pressure sensor for micro-pressure measurement with a cross beam-membrane (CBM) structure. By using the finite element method (FEM) to analyze the stress distribution of the CBM structure and compared with the traditional structures under acceleration signals. Our results show that the sensitivity and linearity of the CBM is better than other structures, but also the acceleration disturb analysis indicating that the CBM structure offers low acceleration interference for micro-pressure measurement in vibration environments.

Abstract: Most of the measurement methods for blue light hazard (BLH) evaluation are based on radiance, which are too complex and hard to find out the highest radiance. We proposed a methodology for measurement of BLH with imaging luminance meter. We measured the relative spectral power distribution with a spectrometer and the maximum luminance with an imaging luminance meter for LEDs and compact fluorescent lamps, and calculated the BLH weighted radiance. The BLH efficacy and the upper limit of luminance with blue light safe of various light sources were also calculated on the basis of the BLH weighted function. The results show absolute blue light safe can be obtained if the luminance is limited to 100 kcd m² for color temperature lower than 6500 K. LEDs with high color temperature, especially those without diffused window, have potential risk of BLH. Our method can be used in online measurement of the BLH of LEDs.

Abstract: With the increase of performance demands, the nonuniformity of on-chip power dissipation becomes greater, causing localized high heat flux hot spots that can degrade the processor performance and reliability. In this paper, a three-dimensional model of the copper microchannel heat sink, with hot spot heating and background heating on the back, was developed and used for numerical simulation to predict the hot spot cooling performance. The hot spot is cooled by localized cross channels. The pressure drop, thermal resistance and effects of hot spot heat flux and fluid flow velocity on the cooling of on-chip hot spots, are investigated in detail.

Abstract: A study has been conducted on the heat transfer of various oscillatory frequencies of pulsation flow through a porous channel network subjected to a constant wall heat flux. The surface temperature distributions, pressure drop, unit thermal resistance and local Nusselt number for different oscillatory frequencies were mainly investigated.

Abstract: Aiming at detecting rate and frame rate problems restricting the development of ferroelectric detector technology, puts forward a new design method of ferroelectric ferroelectric detectors -- detector modulation. Improvement principle and structure of the original ferroelectric detectors, and summarizes the technical features of this device.

Abstract: a generic methodology for development of a virtual instrument (VI) has been presented, which includes how to figure out the strategy of programming, which involves measure of converting measuring and testing scheme into VIs structure; how to design the control & diagram panels, how to correct measuring errors, and how to carry out debugging & simulating. An example is given to illustrate the successful application of the methodology to process monitoring of brush plating.