2011 Symposium on Piezoelectricity, Acoustic Waves and Device Applications (SPAWDA)最新文献_第7页

Preparation of europium (III) doped nanocrystalline zinc oxide in ionic liquid via an ultrasonic irradiation 超声辐照法制备离子液体中掺铕纳米晶氧化锌

2011 Symposium on Piezoelectricity, Acoustic Waves and Device Applications (SPAWDA) Pub Date : 2011-12-01 DOI: 10.1109/SPAWDA.2011.6167303

Yao Yang, B. Gao, Yue-tao Yang, Xiao-Jun Liu, Shu-Yi Zhang

引用次数: 0

Temperature dependence of piezoceramic disk resonant spectrum in radial vibration mode 径向振动模式下压电陶瓷盘谐振谱的温度依赖性

2011 Symposium on Piezoelectricity, Acoustic Waves and Device Applications (SPAWDA) Pub Date : 2011-12-01 DOI: 10.1109/SPAWDA.2011.6167246

M. Chure, Long Wu, King-kung Wu, B. Chen, Chia-Cheng Tung

引用次数: 0

Preparation and properties of BaTiO3/ CoFe2O4 composite ceramics BaTiO3/ CoFe2O4复合陶瓷的制备及性能研究

2011 Symposium on Piezoelectricity, Acoustic Waves and Device Applications (SPAWDA) Pub Date : 2011-12-01 DOI: 10.1109/SPAWDA.2011.6167249

Lin-lin Liu, Yiping Wang, W. Qian, B. Wang, Ying Yang

{"title":"Preparation and properties of BaTiO3/ CoFe2O4 composite ceramics","authors":"Lin-lin Liu, Yiping Wang, W. Qian, B. Wang, Ying Yang","doi":"10.1109/SPAWDA.2011.6167249","DOIUrl":"https://doi.org/10.1109/SPAWDA.2011.6167249","url":null,"abstract":"In this study, we report a general process to prepare BaTiO<inf>3</inf>, CoFe<inf>2</inf>O<inf>4</inf> nanoparticles and other oxides nanoparticles with complex compositions. BaTiO<inf>3</inf>, CoFe<inf>2</inf>O<inf>4</inf> nanoparticles with particle size less than 50nm were fabricated by a surfactant-assisted ball milling process followed a centrifugal separation. Furthermore, ferroelectric/ferrite composites of (1−x) BaTiO<inf>3</inf>/xCoFe<inf>2</inf>O<inf>4</inf> (x=0.1, 0.2, 0.3, 0.5) ceramics were then synthesized. The dependence of the ferroelectric and magnetic properties on the content of CoFe<inf>2</inf>O<inf>4</inf> has been investigated systematically. No interface reaction was observed in the multiferroic ceramics and the samples have been confirmed with excellent ferroelectric and ferromagnetic properties, of which the maximal remnant polarization value of 1.9µC/cm<sup>2</sup> and saturation magnetization of 35emu/g were measured at 10% and 30% of CoFe<inf>2</inf>O<inf>4</inf>, respectively. The dielectric properties of the composites have also been measured as the variation of ferroelectric/magnetic fractions.","PeriodicalId":285701,"journal":{"name":"2011 Symposium on Piezoelectricity, Acoustic Waves and Device Applications (SPAWDA)","volume":"61 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130454275","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}

引用次数: 0

Study on relationship between the Lamb wave velocity and fatigue of plate 兰姆波速与板疲劳关系的研究

2011 Symposium on Piezoelectricity, Acoustic Waves and Device Applications (SPAWDA) Pub Date : 2011-12-01 DOI: 10.1109/SPAWDA.2011.6167239

Wei Lin, Xu Li, Jia qi Wang

引用次数: 1

The correction factors of mindlin plate theory with and without electrodes for SC-cut quartz crystal plates 有电极和无电极的mindlin平板理论对sc切割石英晶体板的修正系数

2011 Symposium on Piezoelectricity, Acoustic Waves and Device Applications (SPAWDA) Pub Date : 2011-12-01 DOI: 10.1109/SPAWDA.2011.6167289

Ji Wang, Gui-jia Chen, Yang-yang Chen, R. Wu, Jianke Du, T. Ma, Dejin Huang

{"title":"The correction factors of mindlin plate theory with and without electrodes for SC-cut quartz crystal plates","authors":"Ji Wang, Gui-jia Chen, Yang-yang Chen, R. Wu, Jianke Du, T. Ma, Dejin Huang","doi":"10.1109/SPAWDA.2011.6167289","DOIUrl":"https://doi.org/10.1109/SPAWDA.2011.6167289","url":null,"abstract":"Mindlin plate theory was first developed to provide accurate solutions for vibrations of thickness-shear mode, which has a much higher frequency than usual flexure vibrations. It has been widely used in the analysis of high frequency vibrations of quartz crystal plates, which are the core of resonators. The vibration frequency solutions obtained with Mindlin plate theory are proven much closer to the exact solutions. However, due to the truncation and approximation, the plate equations need to be corrected, as compared with the three-dimensional elasticity solutions. This has been done for the high-order Mindlin plate theory with and without electrodes for the AT-cut quartz crystal plates, and correction factors have been obtained though both natural and symmetric procedures. The correction factors could be used in the dispersion relationship and frequency spectrum in the analytical solutions, while the symmetric correction factors can be used in the finite element method implementation. Both correction schemes can provide improved and accurate results in the analysis of quartz crystal resonators. The electrodes are considered though its inertia effect as mass ratio known in resonator analysis.","PeriodicalId":285701,"journal":{"name":"2011 Symposium on Piezoelectricity, Acoustic Waves and Device Applications (SPAWDA)","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122635589","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}

引用次数: 7

Size optimization of conical piezoelectric energy harvester 锥形压电能量采集器的尺寸优化

2011 Symposium on Piezoelectricity, Acoustic Waves and Device Applications (SPAWDA) Pub Date : 2011-12-01 DOI: 10.1109/SPAWDA.2011.6167294

Hua Li, Shun-di Hu, H. Tzou

引用次数: 3

Resonant vibration failure modes of quartz resonators 石英谐振器的共振振动失效模式

2011 Symposium on Piezoelectricity, Acoustic Waves and Device Applications (SPAWDA) Pub Date : 2011-12-01 DOI: 10.1109/SPAWDA.2011.6167234

Zi-Gui Huang, Zheng-Yu Chen

引用次数: 0

Love waves in piezoelestric layered structure with functionally graded materail half space 半空间功能梯度材料压电层状结构中的爱波

2011 Symposium on Piezoelectricity, Acoustic Waves and Device Applications (SPAWDA) Pub Date : 2011-12-01 DOI: 10.1109/SPAWDA.2011.6167235

Xiaoshan Cao, F. Jin, Xiaomei Mo, Jun Shi

引用次数: 1

Study on bandgaps of two-dimensional square phononic crystal slabs with cross-like holes 带交叉孔的二维方形声子晶体板带隙研究

2011 Symposium on Piezoelectricity, Acoustic Waves and Device Applications (SPAWDA) Pub Date : 2011-12-01 DOI: 10.1109/SPAWDA.2011.6167210

Yan-Feng Wang, Yuesheng Wang

引用次数: 3

Research on parameters estimation of acoustic vector array signals using the compressed sensing theory 基于压缩感知理论的声矢量阵信号参数估计研究

2011 Symposium on Piezoelectricity, Acoustic Waves and Device Applications (SPAWDA) Pub Date : 2011-12-01 DOI: 10.1109/SPAWDA.2011.6167211

Jin-shan Fu, Xiukun Li, Sheng-qi Yu

{"title":"Research on parameters estimation of acoustic vector array signals using the compressed sensing theory","authors":"Jin-shan Fu, Xiukun Li, Sheng-qi Yu","doi":"10.1109/SPAWDA.2011.6167211","DOIUrl":"https://doi.org/10.1109/SPAWDA.2011.6167211","url":null,"abstract":"In this paper we applied the compressed sensing (CS) theory to signals processing of acoustic vector array, and realized the direction of arrival (DOA) estimation of small number of snapshots data. A new method, called CS, asserts that for sparse or compressible signals, far fewer samples or measurements than traditional methods used can contain all the information of signals. One can recover the original signals accurately from these samples or measurements by using reconstruction algorithms. Herein, we first construct the model of acoustic vector array, and present the corresponding CS algorithm. According to the angle sparse space, the over-complete dictionary can be constructed. The measurement matrix is optimized by the quantum-behaved particle swarm optimization algorithm (QPSO) to decrease the mutual coherence between measurement matrix and over-complete dictionary. An improved orthogonal matching pursuit algorithm (OMP) is used to obtain the estimation of sparse vector. Then from the angle spectrum, the DOA estimation of targets is obtained. By conducting several experiments, we obtained high resolution estimation of targets' DOA on the condition of low signal-to-noise ration (SNR) and small number of snapshots.","PeriodicalId":285701,"journal":{"name":"2011 Symposium on Piezoelectricity, Acoustic Waves and Device Applications (SPAWDA)","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114203135","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}

引用次数: 3