Applied Mechanics and Materials Vols. 34-35

Abstract: With ANSYS finite element analysis software, finite element method was used to analyze the flexible Ferris wheel in this paper. By obtaining stress and deformation of the structure strength and stiffness was calculated and assessed. Improvements were made on this basis to meet the design requirements. With stability and dynamic analysis structure has good global stability and the frequency spectrum of structure is dense and even distribution. The analysis procedure and results indicated in this paper can be used as a reference for the analysis and design of similar projects.

Abstract: In this paper, it monitored ground subsidence in the coal mining area using two-pass D-InSAR technique. We obtained 9 ALOS PALSAR single-look complex (SLC) images in Yanzhou coal mining area from December 2007 to Februay 2009. Based on SAR interferometric pairs and SRTM DEM, we detected the subsided areas and got the vertical subsided quantity. We got the ground subsidence maps in different stages from 2007 to 2009. Several important subsided areas were selected and then analyzed in detail. It analyzed the general laws of mining subsidence. The results indicated that two-pass D-InSAR technique based on L-band PALSAR data and SRTM DEM is a very simple, rapid and efficient way to detect and to monitor ground subsidence in the coal mining area, even in the areas with vegetation covered.

Abstract: The mechanism of original ternary joint robot fingers without drive is analyzed into several component. After its type and number is confirmed , we gain circular topological graph of kinematic chain with topological theory. Based on it, all the generalized kinematic chain is constructed. And so is evolved a series of regenerating kinematic chain and corresponding new type of mechanical graph according to specialized restriction. A designer can choose the new mechanism which is different from original one. The new one has better function, so the designer can realize his innovating design of three-joint robot fingers without drive.

Abstract: Removed due to plagiarism The original research was published as: MODELING OF ULTRASONIC PROPAGATION IN A COARSE GRAIN STRUCTURE By: Jenson, F.; Fortuna, T.; Doudet, L. Edited by: Thompson, DO; Chimenti, DE Conference: 35th Annual Review of Progress in Quantitative Nondestructive Evaluation Location: Univ Chicago, Chicago, IL Date: JUL 20-25, 2008 REVIEW OF PROGRESS IN QUANTITATIVE NONDESTRUCTIVE EVALUATION, VOLS 28A AND 28B Book Series:AIP Conference Proceedings Volume: 1096 Pages: 1201-1208 Published: 2009

Abstract: After two generations’ development driven by investment and external market resource from 1949 to 2008, china formed an export-oriented economy with an Outward Logistics System (OLS). China faces serious constraints from international market under the global financial crisis, which caused Logistics Jam and need Economical transformations to launch a new round of economic growth with more efficient Logistic system in next 30 years to ease jam and to support regional manufactory based on the local special resources for co-development. It would be the power to stimulate further economic growth.

Abstract: By alloying principle, a novel quaternary high-temperature lead-free solder was formed by adding trace Sn into Bi5Sb2Cu. The influences of trace Sn on the microstructure and mechanical properties of the novel solder alloy were systematically investigated. Results show that the new phases â-SnSb and mesh Sb2Sn3 are formed and dispersed in the novel solder, whose dispersion strengthening make the tensile strength and shear strength of the new solder alloy increase. When Sn is less than 8 wt%, the tensile strength and the shear strength of the new solder increase with the increasing of content of Sn. When Sn is 8wt%, the tensile strength and shear strength is respectively 52.79MPa and 17.00MPa, which is respectively improved about 90.6% and 64 wt.% compared to the matrix solder. When Sn is 10wt.%, the mechanical properties of the solder take a decrease trend, but they are still better than those of the matrix solder.

Abstract: The dynamic buckling of composite bars subject to axial rigid body impact are simulated using the finite-element software ABAQUS6.8. The critical velocity and the bifurcate time are obtained by stain-time curve and effects of fiber angle and impact velocity on dynamic buckling behavior of composite bars are also investigated. The results indicate that the ply angle and impact velocity have an influence on dynamic buckling of composite bars.

Abstract: In order to adapt to the current multi-level dispatching management system and to promote the operational efficiency of interconnected electricity networks, this paper proposes a decomposition collaborative model based on optimal power flow theory. The model is a quadratic programming question used to solve optimal power flow model. The information of interchanging between regions is communication price and boundary nodal bus phase angle. IEEE 30-bus test system demonstrates the validity and novelty of the model that the regional network can be calculated reasonably and the development of cross-regional electricity transaction is promoted effectively.

Abstract: Using potassium carbonate, ammonium phosphate, zirconium dioxide, and cobalt oxide as raw materials, a kind of potassium zirconium phosphate ceramic pigments with bright purple color at high temperature were obtained through a series of optimizing experiments. It’s a novel type of ceramic pigments with chromaticity indexes of L*=55.37, a*=18.52, and b*=-30.56. X-ray diffraction (XRD), TG-DTA and chroma analysis were employed to characterize the pigments. The results reveal that potassium zirconium phosphate type ceramic pigments presenting bright purple color is due to Co2+ partially replace Zr4+ in potassium zirconium phosphate crystal lattice, which leads to the lattice distortion because of the formation of Zr2-xCo2x(PO4)3 phase. Moreover, owing to the limitation of solubility of Co2+ in potassium zirconium phosphate crystal lattice, the contents of cobalt oxide added may not be too much.

Abstract: The objective of work proposed in this paper is to propose a new method of measuring gas leakage for pneumatic industry. Compared with traditional flow measurements, equipment using this method can be connected to the pipeline in parallel. The measurement is enabled by employing a standard flow. Standard flow is used to determine the internal volume of the measured equipment. An algorithm is formulated to describe, to the extent possible, the relationship between gas leakage and standard flow. This paper also proposes a pressure differentiator that contains a slit-type laminar flow element. The measurement deviates from the theoretical leakage values by less than 5%, and shows a good precision and scope. In addition, the proposed parallel connection based on standard flow makes easy operation and fast measuring possible, thus promising new area of application for pneumatic equipments.