Applied Mechanics and Materials Vols. 246-247

Abstract: In the modern times, the art of sculpture under the promotion of the development of the interactive multimedia technology using digital technology as a platform has been changed greatly in art language and expressive forms, Under the common infiltration and fusion of these modern technologies, new things has been fused and absorbed by the art of sculpture. In this paper, using the relationship between sculpture materiality and digital virtualization as study topic, the author makes an explorative study on a new expressive form applying the information features of the digi-tal interactive technology to deliver the inner meanings of the sculpture art.

Abstract: With the rapid development of Internet, more and more enterprises establish business sites to achieve the purpose of online transactions. Taking taobao.com for example, hundreds of millions of goods trade on the trading platform. In front of the huge commodity image database, extraction of image features is very convenient for people to find out images of user requirement. This paper focus mainly on the color feature of images. Firstly, we segment ROI of images using grabCut algorithm; secondly, we extract primary color of images by using dominant color descriptor of MPEG 7; Thirdly, we adopt RGB color quantization to quantize the primary color. Finally achieve the purpose of image color navigation. I have done experiment to compare with some other methods, and find that the algorithms I adopted make a better performance.

Abstract: For further study the recognition problem of radar emitter signals (RES), the theory of continuous wavelet transform (CWT) and gray moment are introduced into the feature extraction of RES. A new approach for RES feature extraction was proposed based on CWT and gray moment. By using the time-frequency domain characteristics of wavelet analysis and the moment-based method, the CWT coefficients of RES and the changing rules of RES gray moment were researched. The experiment results shows that the wavelet gray moments of the RES take on a rising trend along with the increase of the order, and the four-order wavelet gray moment vector can express the local information of RES more exactly. This is useful for further research on RES feature extracting.

Abstract: This paper described the characteristics of open virtual equipment platform LabVIEW, and introduced the method to construct data collecting system using this platform. And developed computer controlled monitoring unit of magneto-rheological grease conductivity, tested the relation between magneto-rheological grease conductivity and external magnetic field, particle concentration, and thickness of magneto-rheological grease. In windows system, the virtual instrument constructed by using LabVIEW programming implemented the real time measurement, display, record of conductivity output, analysis its conductivity characteristics, and fitted the output electric resistance data and determined the best fitting curve. The experiment certified that this method doesn't need complex programming, reduces the programming time, and simplifies the development procedure, and increases the flexibility of detection system.

Abstract: Angou deposit locates in the southern part of east Qinling Metallogenic Belt. A few Mo-Pb deposits have been discovered in this region. This paper demonstrates that there is a close relationship between carbonitization and molybdenum mineralization. Therefore carbonitization can be an important prospecting marker for molybdenum. Four Hyperion bands, with the wavelength of 420nm, 803nm, 2324nm and 2385 nm respectively, were selected for principal component analysis to extract carbonitization anomalies. Field work results show good relationship between carbonitization anomaly and molybdite and molybdenum ore bodies. The zones with intensive carbonitization anomalies have good prospecting potential.

Abstract: The paper mainly reviewed the electrical resistivity and application of Cu3N thin films. The electrical resistivity increases from 2×10-5Ω•cm to 2×102Ω•cm. The application of Cu3N thin films as write-once optical recording materials and anode material for Li-ion rechargeable batteries was also presented.

Abstract: In this paper, we examine the beam width performance of the recently addressed robust Capon beam formers. This adaptive array employs the estimated steering vector, injected noise, and pseudo-interference to provide robustness against direction mismatch. With the generalized side lobe canceller (GSC) as the underlying structure, we first derive the effect of angular mismatch on the estimated interference correlation matrix. Then, a simple approximate expression is presented for output signal-to-interference-plus-noise-ratio (SINR) of this new beam former. Based on this expression, the angular beam width of this robust beam former is investigated. Simulation results verify the analytically predicted performance.

Abstract: This paper introduces one siloxane rejuvenation fluid used to rejuvenate aged XLPE cables and also studies the effects and the mechanism of the rejuvenation. Accelerated aging experiment was performed to obtain water tree aged samples. Inject the rejuvenation siloxane fluid into the aged cable samples with a pressure injection system. By comparing the dielectric loss factor and the breakdown voltage level of the samples before and after rejuvenation, inferred that the insulation level of the cable samples after rejuvenation is close to or higher than that of new cables. Additionally, through microscope, organic compounds created by chemical reaction were observed to fill the micro voids and eliminate the moisture in the XLPE layer of the samples. Finally, the electric field was simulated by Finite Element Method (FEM). Based on the results, it's further confirmed that the siloxane rejuvenation fluid can significantly enhance the aged cable insulation.

Abstract: To solve the technical problem of LED chips with top and back electrodes can only forms parallel connection; this paper provided integrated packaging structure by using silver reflective layers, aluminium oxide and aluminum plate. LED chips with top and back electrodes, according to a certain permutations and combinations way, were packaged integrally on the independent silver reflective layers. The silver reflective layers were on the aluminum plate with aluminium oxide insulating layer. Studies show that when the LED chips with top and back electrodes packaged on aluminum plate with aluminium oxide insulating layer are easier to achieve parallel and series connection. Moreover, the LED integrated package devices has higher driving voltage and lower driving current than traditional LED integrated package devices with top and back electrodes. In addition, independent silver reflective layers can provide integrated package devices with a better luminous efficiency.

Abstract: M2052 alloys with various aging treatments are obtained in order to investigate the relationship between aging treatment and damping capacity by the torsion pendulum, X-Ray Diffraction (XRD) and Transmission Electron Microscope (TEM) methods. The results show that M2052 can obtain high damping capacity (δ>0.2) when aged at a range from 400°C to 450°C, and the damping capacity after aged at a lower temperature is higher than that aged at a higher temperature for the maximum values. TEM and XRD results show that fcc-fct transformation occurs after aging treatment. The volumes of fct structures are one of reason to affect the damping capacity in M2052 alloy. The better understanding aging treatment could promote the applications of M2052 alloy.