2011 Symposium on Piezoelectricity, Acoustic Waves and Device Applications (SPAWDA)最新文献_第3页

Design and analysis of a disc-type of traveling wave ultrasonic motor with fixing inner side 内固定盘式行波超声电机的设计与分析

2011 Symposium on Piezoelectricity, Acoustic Waves and Device Applications (SPAWDA) Pub Date : 2011-12-01 DOI: 10.1109/SPAWDA.2011.6167275

Xiu Tian, J. Qu, Jian-chun Li, Yuedong Lang, Yan-li Wang

引用次数: 0

Two-dimensional manipulation of microbubbles using standing leaky surface acoustic wave 利用驻漏表面声波对微气泡进行二维操纵

2011 Symposium on Piezoelectricity, Acoustic Waves and Device Applications (SPAWDA) Pub Date : 2011-12-01 DOI: 10.1109/SPAWDA.2011.6167253

Long Meng, Feiyan Cai, Hai-rong Zheng

引用次数: 0

The structure designing and the dynamic analysis of alternating-force linear ultrasonic motors 交变力直线超声电机的结构设计与动力学分析

2011 Symposium on Piezoelectricity, Acoustic Waves and Device Applications (SPAWDA) Pub Date : 2011-12-01 DOI: 10.1109/SPAWDA.2011.6167195

Sheng-li Zhou, Z. Yao, J. Sha

引用次数: 1

A circuit design in piezoelectric vibration measurement system 压电振动测量系统的电路设计

2011 Symposium on Piezoelectricity, Acoustic Waves and Device Applications (SPAWDA) Pub Date : 2011-12-01 DOI: 10.1109/SPAWDA.2011.6167306

Hui-Yu Li, Hua Li, H. Tzou

引用次数: 6

Lymphocytes favor the attachment of CD11A-targeted microbubbles with endothelial cells in vitro 淋巴细胞倾向于cd11a靶向微泡与内皮细胞的体外附着

2011 Symposium on Piezoelectricity, Acoustic Waves and Device Applications (SPAWDA) Pub Date : 2011-12-01 DOI: 10.1109/SPAWDA.2011.6167252

Wei Yang, Fei Yan, Juanjuan Chen, Hai-rong Zheng

{"title":"Lymphocytes favor the attachment of CD11A-targeted microbubbles with endothelial cells in vitro","authors":"Wei Yang, Fei Yan, Juanjuan Chen, Hai-rong Zheng","doi":"10.1109/SPAWDA.2011.6167252","DOIUrl":"https://doi.org/10.1109/SPAWDA.2011.6167252","url":null,"abstract":"Ultrasound molecular imaging may provide new insights into the early detection and diagnose of diseases, such as atherosclerosis, thrombosis as well as inflammations by the attachment of various targeted contrast agents with disordered endothelium. However, molecular imaging of disordered endothelium in large and middle-sized arteries by site-specific accumulation of contrast agents is still difficult to achieve due to wall shear stress conditions in these vessels. Here, we provided an alternative strategy to improve the attachment of targeted contrast agents with endothelium with the aid of lymphocytes. Given the fact that lymphocytes are naturally equipped to adhere selectively to endothelium and to resist physiologic shear stresses in large- and middle-sized arteries, in this study, the targeted microbubbles were prepared by conjugating anti-CD11a antibodies to the biotinylated microbubbles through biotin-avidin linkage. The resulting targeted microbubbles were able to bind with TNF-α-stimulated lymphocytes, which could also adhere to murine endothelial bEnd.3 cells at same time. The number of adhered microbubbles increased in concomitant with elevation of TNF-α concentration, with mean 4 ± 4, 7 ± 4, 21 ± 9 and 103 ± 13 microbubbles per view field (200 ×) for 0.4, 2, 10 and 50 ng/ml of TNF-α stimulation, respectively. In contrast, fewer targeted microbubbles adhered to the TNF-α-stimulated endothelial cells without assistance of lymphocytes. These findings suggested that lymphocytes might be useful as a vehicle of targeted microbubbles to increase the site-specific accumulation of targeted ultrasound contrast agent and have potential application to ultrasound molecular imaging of cardiovascular diseases.","PeriodicalId":285701,"journal":{"name":"2011 Symposium on Piezoelectricity, Acoustic Waves and Device Applications (SPAWDA)","volume":"23 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":"124463402","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

Stress-type hybrid ultrasonic motors of using longitudinal and torsional vibration modes based on the d31 effect of piezoelectric ceramics 基于压电陶瓷d31效应的纵向和扭转振动模式的应力型混合超声电机

2011 Symposium on Piezoelectricity, Acoustic Waves and Device Applications (SPAWDA) Pub Date : 2011-12-01 DOI: 10.1109/SPAWDA.2011.6167182

Longfei Wan, Lin Yang, Fan Li, Qing-jun Ding

引用次数: 1

Research on the reverberation absorption coefficient of material measured by underwater reverberation field method 水下混响场法测量材料混响吸收系数的研究

2011 Symposium on Piezoelectricity, Acoustic Waves and Device Applications (SPAWDA) Pub Date : 2011-12-01 DOI: 10.1109/SPAWDA.2011.6167209

Yang Song, Zhen-qi Zhao, Wei Zhang, Sheng-qi Yu

{"title":"Research on the reverberation absorption coefficient of material measured by underwater reverberation field method","authors":"Yang Song, Zhen-qi Zhao, Wei Zhang, Sheng-qi Yu","doi":"10.1109/SPAWDA.2011.6167209","DOIUrl":"https://doi.org/10.1109/SPAWDA.2011.6167209","url":null,"abstract":"In this article, an underwater reverberation time model of a rubber board is established. Then a theory formula of reverberation time T(r<inf>m</inf>,λ<inf>m</inf>) is given according to the energy relation of sound field in the reverberation chamber. r<inf>m</inf> is the reflecting fraction and λ<inf>m</inf> is the absorption fraction, when sound wave is injected to a rubber board. r<inf>m</inf> and λ<inf>m</inf> can be resolved base on the wave theory and boundary condition. In addition, r<inf>m</inf> and λ<inf>m</inf> are related to acoustic parameters of the rubber board. T(r<inf>m</inf>,λ<inf>m</inf>)computed by formula and reverberation time T<inf>0</inf> measured in underwater space without material are all taken to Eyring formula, thus reverberant absorption coefficient of measured material can be forecasted. The edge effect due to the material is avoided using this method. In the simulation results of reverberation time and sound absorption coefficient agree with fact ruler. In pool experiment, reverberation time was measured in two cases. One case is that there is only water in the experimental water area, and another case is that the sample is put in water. The measurement results of the pool show the reverberant time T(r<inf>m</inf>,λ<inf>m</inf>)with rubber board is shorter than the reverberant time T0 without rubber board, since absorption rubber board accelerates the speed of reverberant attenuation. The reverberant time T(r<inf>m</inf>,λ<inf>m</inf>) by experiment agree with the theory result. The sample frequency characteristic of the reverberation absorption coefficient accords with theory result.","PeriodicalId":285701,"journal":{"name":"2011 Symposium on Piezoelectricity, Acoustic Waves and Device Applications (SPAWDA)","volume":"358 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":"122809422","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: 1

Optimum structural design of the miniature u-shape linear ultrasonic motor 微型u型直线超声电机的优化结构设计

2011 Symposium on Piezoelectricity, Acoustic Waves and Device Applications (SPAWDA) Pub Date : 2011-12-01 DOI: 10.1109/SPAWDA.2011.6167196

Yang Jiao, Z. Yao, Zheng-xu Hu, Sheng-li Zhou

引用次数: 1

Analysis of the vibration of Film Bulk Acoustic wave Resonators based on Mindlin plate theory 基于Mindlin板理论的薄膜体声波谐振器振动分析

2011 Symposium on Piezoelectricity, Acoustic Waves and Device Applications (SPAWDA) Pub Date : 2011-12-01 DOI: 10.1109/SPAWDA.2011.6167256

Dejin Huang, Ji Wang

引用次数: 1

A surface electrode on a piezoelectric semi-infinite media under electric impulse 电脉冲作用下压电半无限介质上的表面电极

2011 Symposium on Piezoelectricity, Acoustic Waves and Device Applications (SPAWDA) Pub Date : 2011-12-01 DOI: 10.1109/SPAWDA.2011.6167231

Baolin Wang, Jiecai Han

引用次数: 0