发布求助
文献互助 智能选刊 最新文献

IEEE Symposium on Ultrasonics最新文献

筛选
英文 中文
Saturation power level of magnetostatic wave devices 静磁波器件的饱和功率水平
IEEE Symposium on Ultrasonics Pub Date : 1990-12-04 DOI: 10.1109/ULTSYM.1990.171350
K. Yashiro, S. Ohkawa
{"title":"Saturation power level of magnetostatic wave devices","authors":"K. Yashiro, S. Ohkawa","doi":"10.1109/ULTSYM.1990.171350","DOIUrl":"https://doi.org/10.1109/ULTSYM.1990.171350","url":null,"abstract":"The saturation power level of three fundamental MSW (magnetostatic wave) modes is calculated theoretically on the basis of Suhl's theory, assuming that magnetostatic waves can be approximately regarded as a uniform precession of magnetization. Simple formulas for estimating the threshold values of the saturation power level of MSW devices are derived. These formulas provide quantitative information on the saturation power level of MSW devices and facilitate a qualitative understanding of the nonlinear behavior of MSW devices. Numerical results are in good agreement with experimental data.<<ETX>>","PeriodicalId":412254,"journal":{"name":"IEEE Symposium on Ultrasonics","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114063399","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
Differential delay line on X-cut LiTaO/sub 3/ X-cut上的差分延迟线LiTaO/ sub3 /
IEEE Symposium on Ultrasonics Pub Date : 1990-12-04 DOI: 10.1109/ULTSYM.1990.171318
C. Kappacher, G. Visintini
{"title":"Differential delay line on X-cut LiTaO/sub 3/","authors":"C. Kappacher, G. Visintini","doi":"10.1109/ULTSYM.1990.171318","DOIUrl":"https://doi.org/10.1109/ULTSYM.1990.171318","url":null,"abstract":"The authors describe the design of a differential delay line on the X-cut of LiTaO/sub 3/, which gives a better temperature stability than other substrates commonly used for broadband SAW (surface acoustic wave) filters. The analysis of the device transfer function is described, taking into account the asymmetric slowness curve used in the compensation of second-order effects. The agreement of design and measurement is better than +or-0.1 dB in magnitude and +or-1 degrees in the phase within the filter passband. Stop-band suppression was better than -55 dB with an inline configuration and was not degraded by bulk modes. The surface velocity on the free surface was determined using group delay measurements of the differential delay, allowing a better estimate of the group delay for future designs.<<ETX>>","PeriodicalId":412254,"journal":{"name":"IEEE Symposium on Ultrasonics","volume":"128 3","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"113940001","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
Further studies on ultrasonic contrast blood flowmetry 超声对比血流法的进一步研究
IEEE Symposium on Ultrasonics Pub Date : 1990-12-04 DOI: 10.1109/ULTSYM.1990.171626
K. Shung, I. Kuo, R.R. Flenniken, G. Cloutier
{"title":"Further studies on ultrasonic contrast blood flowmetry","authors":"K. Shung, I. Kuo, R.R. Flenniken, G. Cloutier","doi":"10.1109/ULTSYM.1990.171626","DOIUrl":"https://doi.org/10.1109/ULTSYM.1990.171626","url":null,"abstract":"It was demonstrated in a previous work (see IEEE Ultras. Sym. Proc., vol.2, pp.907-910, 1989) that change in ultrasonic attenuation of a flowing fluid as a function of time following a bolus injection of a gaseous ultrasonic contrast agent can be used to derive mean flow rate based upon the indicator dilution principle and that flow profile can be estimated using a real-time B-scanner from images of the agent. Here, results are presented to show that ultrasonic contrast agents may also be useful for time domain blood flow estimation via cross-correlation or a dual-probe approach. Two different approaches of time domain contrast ultrasonic flowmetry were studied using a mock flow loop: (1) velocity estimation using an optical correlator from recorded video ultrasonic images, and (2) velocity estimation using a two-probe arrangement from cross correlation of RF signals. Both methods use bolus injection of a contrast agent upstream from the monitoring site.<<ETX>>","PeriodicalId":412254,"journal":{"name":"IEEE Symposium on Ultrasonics","volume":"47 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122439070","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: 2
VF/sub 2//VF/sub 3/ copolymer line hydrophone array for ultrasonic field characterization (of medical transducers) 用于超声场表征的VF/sub 2//VF/sub 3/共聚物线水听器阵列(用于医用换能器)
IEEE Symposium on Ultrasonics Pub Date : 1990-12-04 DOI: 10.1109/ULTSYM.1990.171381
H. Chan, A. H. Ramelan, I. Guy, D. C. Price
{"title":"VF/sub 2//VF/sub 3/ copolymer line hydrophone array for ultrasonic field characterization (of medical transducers)","authors":"H. Chan, A. H. Ramelan, I. Guy, D. C. Price","doi":"10.1109/ULTSYM.1990.171381","DOIUrl":"https://doi.org/10.1109/ULTSYM.1990.171381","url":null,"abstract":"Line hydrophones and a line hydrophone array for measuring the spatial and temporal characteristics of medical ultrasonic transducers have been fabricated using a polyvinylidene fluoride/trifluoroethylene (VF/sub 2//VF/sub 3/) copolymer. Copolymer films are cast by melt extrusion onto fine wires (114- mu m and 60- mu m diameters). Fine wires are used in order to provide high spatial resolution in the ultrasonic field measurements. A saline bath is used as the ground electrode in poling the copolymer lines. The construction and performance of the line hydrophones and the 23-element line hydrophone array are reported. As the output of a line hydrophone is proportional to the line integral of the acoustic pressure, a computer-tomographic technique is used to reconstruct the pressure profiles. The beam profile of a hyperthermia transducer has been measured.<<ETX>>","PeriodicalId":412254,"journal":{"name":"IEEE Symposium on Ultrasonics","volume":"96 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122541739","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
Ultrasonic measurements in the superconducting state of URu/sub 2/Si/sub 2/ 超导状态下URu/ sub2 /Si/ sub2 /的超声测量
IEEE Symposium on Ultrasonics Pub Date : 1990-12-04 DOI: 10.1109/ULTSYM.1990.171557
Q. Ran, S. Lin, S. Adenwalla, D. Hinks, Z. Zhao, J. Ketterson, M. Levy, B. Sarma
{"title":"Ultrasonic measurements in the superconducting state of URu/sub 2/Si/sub 2/","authors":"Q. Ran, S. Lin, S. Adenwalla, D. Hinks, Z. Zhao, J. Ketterson, M. Levy, B. Sarma","doi":"10.1109/ULTSYM.1990.171557","DOIUrl":"https://doi.org/10.1109/ULTSYM.1990.171557","url":null,"abstract":"Measurements of attenuation, velocity, and AC susceptibility on a URu/sub 2/Si/sub 2/ single crystal in the frequency range from 32 to 300 MHz and the temperature range from 300 mK up to 25 K are reported. The measurements of ultrasound and AC susceptibility were performed on the same single crystal of URu/sub 2/Si/sub 2/ (0.37 cm long) in the vicinity of the Neel transition temperature T/sub N/ and the superconducting transition temperature T/sub c/. The results show sharp signatures at T/sub N/ and near T/sub c/. The measurements of both attention and velocity across the superconducting transition show an attenuation peak and jump, respectively. The results of a magnetic field sweep indicate that URu/sub 2/Si/sub 2/ may also show a magnetic-field-induced phase transition.<<ETX>>","PeriodicalId":412254,"journal":{"name":"IEEE Symposium on Ultrasonics","volume":"82 24","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120821079","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
Theoretical study of AC photothermal response of semiconductor p-n junction devices (solar cells) 半导体p-n结器件(太阳能电池)交流光热响应的理论研究
IEEE Symposium on Ultrasonics Pub Date : 1990-12-04 DOI: 10.1109/ULTSYM.1990.171447
Shu-Yi Zhang, Jian-chun Cheng
{"title":"Theoretical study of AC photothermal response of semiconductor p-n junction devices (solar cells)","authors":"Shu-Yi Zhang, Jian-chun Cheng","doi":"10.1109/ULTSYM.1990.171447","DOIUrl":"https://doi.org/10.1109/ULTSYM.1990.171447","url":null,"abstract":"A theoretical study of AC photothermal responses of semiconductor p-n junction devices in the photogenerated (or applied) voltage is presented. It covers the entire set of optical, electronic, thermal, and geometric parameters involved in the operation of conventional p-n junction devices. The coupling between DC and AC components of the time-dependent transport equations of the minority carriers is considered in the theoretical analyses, and the thermalization due to the minority carriers across the space-charge region is taken into account.<<ETX>>","PeriodicalId":412254,"journal":{"name":"IEEE Symposium on Ultrasonics","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126180301","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
Ultrasound thermometry in hyperthermia 热疗中的超声测温
IEEE Symposium on Ultrasonics Pub Date : 1990-12-04 DOI: 10.1109/ULTSYM.1990.171648
S. Ueno, Masahio Hashimoto, H. Fukukita, T. Yano
{"title":"Ultrasound thermometry in hyperthermia","authors":"S. Ueno, Masahio Hashimoto, H. Fukukita, T. Yano","doi":"10.1109/ULTSYM.1990.171648","DOIUrl":"https://doi.org/10.1109/ULTSYM.1990.171648","url":null,"abstract":"A hyperthermia thermometry system using an ultrasound nonlinear effect caused by superposed pulses was developed. A feasibility study was made to obtain temperature mapping of tissue phantoms and of anesthetized pigs heated by an ultrasound applicator. The thermometry system consists of a mechanical sector scanner and a mainframe with a color monitor. The distribution of the temperature rise is calculated within one minute, and displayed on the monitor together with an ultrasound B-mode image. Experimental results show that a reasonable temperature rise mapping was obtained in both objects, agreeing to within 2 degrees C with the data obtained by thermocouples located in the phantom.<<ETX>>","PeriodicalId":412254,"journal":{"name":"IEEE Symposium on Ultrasonics","volume":"74 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127115728","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: 72
Analysis of the acoustooptic interaction in proton-exchanged lithium niobate (light deflectors) 质子交换铌酸锂(偏转器)声光相互作用分析
IEEE Symposium on Ultrasonics Pub Date : 1990-12-04 DOI: 10.1109/ULTSYM.1990.171433
E. Biebl, P. Russer
{"title":"Analysis of the acoustooptic interaction in proton-exchanged lithium niobate (light deflectors)","authors":"E. Biebl, P. Russer","doi":"10.1109/ULTSYM.1990.171433","DOIUrl":"https://doi.org/10.1109/ULTSYM.1990.171433","url":null,"abstract":"The calculation of the efficiency of planar acoustooptic light deflectors based on PE:LiNbO/sub 3/ waveguides is presented. Both the collinear and the noncollinear interaction geometries on Y-cut LiNbO/sub 3/ are evaluated. By use of recently determined elastic stiffness constants of PE:LiNbO/sub 3/, the acoustic and electric field distributions of the propagating Rayleigh waves are calculated rigorously. Coupling between the optical modes is treated by a coupled mode approach. The dependence of the coupling strength on the acoustic frequency, mode type, and waveguide parameter is given.<<ETX>>","PeriodicalId":412254,"journal":{"name":"IEEE Symposium on Ultrasonics","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133280229","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
The effects of ultrasonic irradiation on sprouting radish seed 超声波辐照对萝卜种子发芽的影响
IEEE Symposium on Ultrasonics Pub Date : 1990-12-04 DOI: 10.1109/ULTSYM.1990.171652
S. Shimomura
{"title":"The effects of ultrasonic irradiation on sprouting radish seed","authors":"S. Shimomura","doi":"10.1109/ULTSYM.1990.171652","DOIUrl":"https://doi.org/10.1109/ULTSYM.1990.171652","url":null,"abstract":"The author experimentally confirmed that by using ultrasonic irradiation, radish vegetable seeds immersed in water germinate and grow more rapidly than without irradiation. The ultrasonic intensity level was low enough not to generate thermal action caused by ultrasound propagation, which is generated by a piezoelectric 30-mm-diameter ceramic transducer which operates at a resonant frequency of 700 kHz and is excited by 0.38 W of electric power. In one vessel of styrofoam filled with water, radish seeds are immersed and the transducer is set up in front of the seeds. Another vessel is prepared to observe seeds growing naturally under water, at room temperature. The length of the root ultrasonically was 13% to 16% longer than the one grown naturally.<<ETX>>","PeriodicalId":412254,"journal":{"name":"IEEE Symposium on Ultrasonics","volume":"57 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124543867","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: 9
Growth and applications of piezoelectric and ferroelectric thin films 压电和铁电薄膜的生长和应用
IEEE Symposium on Ultrasonics Pub Date : 1990-12-04 DOI: 10.1109/ULTSYM.1990.171422
T. Shiosaki
{"title":"Growth and applications of piezoelectric and ferroelectric thin films","authors":"T. Shiosaki","doi":"10.1109/ULTSYM.1990.171422","DOIUrl":"https://doi.org/10.1109/ULTSYM.1990.171422","url":null,"abstract":"The importance of polar-axis-oriented films and epitaxial films of polar crystals in piezoelectric, pyroelectric, optical, and ferroelectric applications is emphasized. The applications of these films of polar crystals are reviewed. The recent development of an acoustooptic deflector made of ZnO thin-film optics and Si Schottky diode photodetectors integrated on a Si substrate is described. The growth of ferroelectric films by reactive magnetron sputtering and photo MOCVD and their properties related to ferroelectric memory applications are described.<<ETX>>","PeriodicalId":412254,"journal":{"name":"IEEE Symposium on Ultrasonics","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127690385","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
首页 上一页
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整，为了账户安全，请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
请完成安全验证×
相关产品
×
本文献相关产品
联系我们：info@booksci.cn Book学术提供免费学术资源搜索服务，方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号：604180095
Book学术官方微信
小红书