International Forum on Strategic Technology 2010最新文献

{"title":"Investigation on the morphology and properties of PI/SiO2-Al2O3 composite films","authors":"Lizhu Liu, Liqian Yang, L. Weng, Jia-qi Lin","doi":"10.1109/IFOST.2010.5668000","DOIUrl":"https://doi.org/10.1109/IFOST.2010.5668000","url":null,"abstract":"Polyimides (PI) are widely used in microelectronic industries because of their outstanding characteristics such as good mechanical, thermal and dielectric properties. In this paper, a novel PI/SiO<inf>2</inf>-Al<inf>2</inf>O<inf>3</inf> co-doped composite film was prepared. The inorganic phases of SiO<inf>2</inf> were added to PAA solution by sol-gel method with TEOS as precursor, while the Al<inf>2</inf>O<inf>3</inf> phase was added as particles by ultrasonic-mechanical method. The structure and morphology of polyimide/SiO<inf>2</inf>-Al<inf>2</inf>O<inf>3</inf> composite films were characterized by FTIR and SEM. FTIR results indicated that after SiO<inf>2</inf> and Al<inf>2</inf>O<inf>3</inf> addition, the Si-O-Si band drafted from 1100cm⁻¹ to 1154cm⁻¹, possibly indicated the new structure formation. Moreover, all the mechanical properties of PI/SiO<inf>2</inf>-Al<inf>2</inf>O<inf>3</inf> co-doped films are higher than that of the pure PI. When the Si/Al weight ratio was 4∶1 and total inorganic phases content reached 2wt.%, the electric breakdown strength of PI/SiO<inf>2</inf>-Al<inf>2</inf>O<inf>3</inf> composite films was the highest among the samples and reached 204kV/mm, which was 24% higher than pure PI.","PeriodicalId":379676,"journal":{"name":"International Forum on Strategic Technology 2010","volume":"412 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124407011","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Self-indused roll-oscillation delta wing on high angeles of attack","authors":"G. Shumsky","doi":"10.1109/IFOST.2010.5667939","DOIUrl":"https://doi.org/10.1109/IFOST.2010.5667939","url":null,"abstract":"The self - induced roll oscillations (wing rock) are studies by mean of numerical simulations of a separated flow an around of delta wing. A computational algorithm is constructed on the basis of the vortex-lattice method. For regimes of self-induced vibrations, the calculation results agree well with experimental data. The vortex nature and the mechanism of self-induced oscillations are studied. Initial phase of self-induced oscillations, integral curves of motion equation on the phase plane, vortex structure above a delta wing are considered. The self - induced roll oscillations of delta wing are being considered to apply in car industry as an aerodynamic windshield cleaner on a high speed move.","PeriodicalId":379676,"journal":{"name":"International Forum on Strategic Technology 2010","volume":"73 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124801352","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Crystal structural investigations of Mongolian natural zeolites","authors":"G. Batdemberel, S. Chadraabal, P. Jargalbat, D. Sangaa, B. Namjildorj","doi":"10.1109/IFOST.2010.5667928","DOIUrl":"https://doi.org/10.1109/IFOST.2010.5667928","url":null,"abstract":"We have studied zeolitic rocks discovered in Mongolia using electron microscopy (SEM), X-ray fluorescence (XRF), X-ray diffraction (XRD) methods. SEM, XRF and XRD measurements were carried out in the Max Plank Institute of Stuttgart, Germany. Our samples are collected from Mongolian deposits: Tsagaan tsav, Tushig uul, Urgun deposit, Bayan Zurkh Black Mountain and Mandal ovoo. Firstly, we have made chemical element analysis by using X-ray fluorescence spectroscopy which gives chemical contents of samples from all zeolite deposits. Comparing contents of above 5 deposits samples shows us that zeolite of Tushig Mountain, Dornogobi, is has the highest content of potassium and can be identified in potassium clinoptilolite- K (2.56 at %), others belong to clinoptilolite- Na. The main cations are K,Na,Ca,Mg,Fe,Ti for all the samples from the above mentioned deposits. Also, the (Si Al)/O ratio shows that the Mongolian zeolites have comparatively good qualities. We made X-ray phase analysis study on X-ray powder diffractometer Bruker-Axes D8 and refined the X-ray diffraction spectra by using ≪Match! Crystal Impact≫ program. As a result, we established that these zeolites are Na and K type of clinoptilolite with monoclinic symmetry (C2/m). Finally, the exact crystallochemical formula of clinoptilolites can be written as the next: • (Na<inf>2.02</inf>, K<inf>1.81</inf>, Mg<inf>0.49</inf>, Ca<inf>0.46</inf>, Fe<inf>0.36</inf>)(Al<inf>6.28</inf>O<inf>30.45</inf>) (Si<inf>28.47</inf>O<inf>30.45</inf>)·z·H<inf>2</inf>O for Tsagaan tsav sample. • (K<inf>2.56</inf>, Na<inf>1.69</inf>, Mg<inf>0.64</inf>, Ca<inf>0.47</inf>, Fe<inf>0.78</inf>)(Al<inf>6.39</inf>O<inf>28.15</inf>) (Si<inf>31.17</inf>O<inf>28.15</inf>)·z·H<inf>2</inf>O for Tushig Mountain sample. • (Na<inf>2.34</inf>, K<inf>1.48</inf>, Mg<inf>0.86</inf>, Ca<inf>0.57</inf>, Fe<inf>0.62</inf>)(Al<inf>7</inf>O<inf>29.03</inf>) (Si<inf>29.07</inf>O<inf>29.03</inf>)·z·H<inf>2</inf>O for Urgun deposit sample. • (Na<inf>2.14</inf>, K<inf>1.64</inf>, Mg<inf>0.53</inf>, Fe<inf>0.64</inf>, Ti<inf>0.19</inf>)(Al<inf>6.38</inf>O<inf>28.95</inf>) (Si<inf>30.59</inf>O<inf>28.95</inf>)·z·H<inf>2</inf>O for Bayan Zurh Black Mountain sample. • (Na<inf>3.59</inf>, K<inf>1.17</inf>, Ca<inf>1.17</inf>, Mg<inf>0.68</inf>, Fe<inf>0.30</inf>)(Al<inf>6.58</inf>O<inf>28.90</inf>) (Si<inf>28.65</inf>O<inf>28.90</inf>)·z·H<inf>2</inf>O for Mandalovoo sample.","PeriodicalId":379676,"journal":{"name":"International Forum on Strategic Technology 2010","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116590101","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effects of carrier gas flow-rate and oxygen admixture ratio on particle parameters in Ar-O2 plasma","authors":"M. R. Alam, P. Shadhu Khan, M. Matin, M. M. Hossain","doi":"10.1109/IFOST.2010.5668108","DOIUrl":"https://doi.org/10.1109/IFOST.2010.5668108","url":null,"abstract":"Taking into account the strong plasma-particle interactions and particle loading effects, a model of plasma-particle interaction of argon-oxygen plasma has been developed for the numerical predict the particle temperature, velocity, trajectory and plasma temperature isotherm during the in-flight treatment. In this model the conservative equations solves the conservative equations to predict the plasma trajectories under local thermal equilibrium condition. It is found that the carrier gas flow-rate strongly affects the particle temperature and the admixture ratio of oxygen to argon affects the plasma temperature isotherm as well as the particle temperature.","PeriodicalId":379676,"journal":{"name":"International Forum on Strategic Technology 2010","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129507876","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Preparation of poly(vinyl chloride)-solvothermally reduced graphene composite by latex tecnology","authors":"T. Dang, V. Pham, J. Chung","doi":"10.1109/IFOST.2010.5667932","DOIUrl":"https://doi.org/10.1109/IFOST.2010.5667932","url":null,"abstract":"Graphene, a one-atom-thick planar sheet of sp2-bonded carbon atoms, has attracted great attention due to its extraordinary electrical, excellent mechanical, superior thermal properties and high specific surface areas [1]. One of the most immediate applications is using graphene as nanofiller to improve the electrical and thermal conductivity, and mechanical property of polymer [2–9]. Stankovich et al. [2] reported that polystyrene-graphene composite exhibited the percolation threshold of 0.1 volume per cent for room-temperature electrical conductivity, which is the most lowly reported value for any carbon-based composite, and at only 1 volume per cent, that composite had a conductivity of 0.1 S m−1 which is sufficient for many electrical applications [10]. Ramanathan et al. [3] reported an unprecedented shift in glass transition temperature of nearly 30 oC was obtained for poly (methyl methacrylate) at only 0.05 wt% of graphene. In most cases, polymer-graphene composites exhibit higher improvement compared with that of polymer-carbon nanotube.","PeriodicalId":379676,"journal":{"name":"International Forum on Strategic Technology 2010","volume":"51 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114928036","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"DC voltage current characteristic of Silicon Carbide/ low-density polyethylene composites","authors":"Wenmin Guo, B. Han, Zhonghua Li","doi":"10.1109/IFOST.2010.5667956","DOIUrl":"https://doi.org/10.1109/IFOST.2010.5667956","url":null,"abstract":"In this paper, nonlinear composite materials were prepared by filling Silicon Carbide (SiC) powder into low-density polyethylene (LDPE). The effect of contents and particle sizes of SiC on the DC voltage current characteristic of SiC/ LDPE composite materials was studied. The results showed that the conductivity and non-linear conductive coefficient of the composites increased with the contents of SiC. The particle size of SiC had no effect on the DC voltage current characteristic of composites when filler concentration was low, while when the concentration was increased, the conductivity and non-linear conductive coefficient of composites increased with particle size of SiC. The conductivity and non-linear conductive coefficient of the composites filled by nano-meter SiC were superior to those of the composites filled by micro-meter SiC with the same content.","PeriodicalId":379676,"journal":{"name":"International Forum on Strategic Technology 2010","volume":"52 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127280122","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Outdoor stairway segmentation using vertical vanishing point and directional filter","authors":"Danilo Cáceres Hernández, K. Jo","doi":"10.1109/IFOST.2010.5667914","DOIUrl":"https://doi.org/10.1109/IFOST.2010.5667914","url":null,"abstract":"In this paper we propose to detect the localization and recognition of outdoor stairway. This problem is the most fundamental step in solving the problem of autonomous stair climbing navigation. An autonomous system must be able to recognize parameters that can describe stairways in unknown environments. First, we proposed to extract the longest segments of diagonal lines from the edge image in order to identify a set of diagonal line segments candidate. This can provide information itself. Based on the vanishing point we defined the area where the stair candidate is located. We then applied the Gabor filter to detect the horizontal line. Finally, after combining the previous two steps, the algorithm defined the candidate stair area in the image. A set of stair images were used within a variety of conditions in our proposed method. As a result, testing was able to prove its effectiveness.","PeriodicalId":379676,"journal":{"name":"International Forum on Strategic Technology 2010","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132450796","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Z-source inverter based grid connected for PMSG wind power system","authors":"Trinh Quoc-Nam, Lee， Hong-Hee","doi":"10.1109/IFOST.2010.5668060","DOIUrl":"https://doi.org/10.1109/IFOST.2010.5668060","url":null,"abstract":"This paper presents a grid connected control algorithm for PMSG wind power system using a Z-source inverter. The Z-source inverter has a unique single stage buck boost feature that it can generate any AC output voltage regardless DC input voltage by regulating of shoot-through time. In the proposed control system, the variation of shoot-through time is used to maintain Z-source capacitor voltage stable meanwhile the regulation of d-q axis current is used to extract the maximum power from wind turbine and deliver to grid. The proposed system has higher performance, higher efficiency and lower cost compare with boost dc-dc converter and three-phase inverter (BC-VSI) structure. The simulation results have been verified the effectiveness of proposed control method.","PeriodicalId":379676,"journal":{"name":"International Forum on Strategic Technology 2010","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130889586","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Contour-based algorithm for vectorization of satellite images","authors":"A. Kirsanov, A. Vavilin, K. Jo","doi":"10.1109/IFOST.2010.5668109","DOIUrl":"https://doi.org/10.1109/IFOST.2010.5668109","url":null,"abstract":"Process of object recognition in satellite images of high resolution is a complex task associated with a time consumption and complexity of the operator's work. This paper describes an innovative approach for solving this problem. Based on monochromatic high-resolution satellite images (in the process of using data from the QuickBird satellite with a maximum resolution of 0.6 meters per pixel) geodata bitmap and vectorized output are received (shape files). The principle of object recognition in a satellite image is based on the allocation of edges in the gradient transition using a threshold filter. Obtained data is then transformed to a vector output using straight line detection and connected components analysis. The proposed method allows to process satellite images of large size with high performance. The performance of the proposed method can be improved by using GPU-based computations.","PeriodicalId":379676,"journal":{"name":"International Forum on Strategic Technology 2010","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125405285","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A study on the welding deformation due to laser hybrid butt welding","authors":"Joo-sung Lee, I. C. Park","doi":"10.1109/IFOST.2010.5667970","DOIUrl":"https://doi.org/10.1109/IFOST.2010.5667970","url":null,"abstract":"Welding is one of the fundamental processes in manufacturing marine structures. It has been well appreciated that more efficient welding process is needed in order to improve the productivity in manufacturing procedure of marine structure. Laser hybrid welding process is one of the best candidates to meet this need. The purpose of this study is to develop the simplified formulas to predict the angular distortion and transverse shrinkage of thin panels due to butt welding using laser hybrid arc welding process. Welding tests have been carried out with varying parameters which affects weld-induced deformation. The present thermo-elasto plastic analysis by nonlinear finite element analysis scheme has been also carried out through the thermo-elasto plastic analysis, and formula to predict the angular distortion and shrinkage are derived based on results of both numerical simulation and welding tests.","PeriodicalId":379676,"journal":{"name":"International Forum on Strategic Technology 2010","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121544389","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}