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2019 Symposium on Piezoelectrcity,Acoustic Waves and Device Applications (SPAWDA)最新文献

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Research on Horizontal Directional Drilling Locatingtechnology Based on Seismic Interference 基于地震干扰的水平定向钻井定位技术研究
2019 Symposium on Piezoelectrcity,Acoustic Waves and Device Applications (SPAWDA) Pub Date : 2019-01-01 DOI: 10.1109/SPAWDA.2019.8681880
J. Guo, Hao Chen
{"title":"Research on Horizontal Directional Drilling Locatingtechnology Based on Seismic Interference","authors":"J. Guo, Hao Chen","doi":"10.1109/SPAWDA.2019.8681880","DOIUrl":"https://doi.org/10.1109/SPAWDA.2019.8681880","url":null,"abstract":"In recent years, with the rapid development of trenchless technology, underground horizontal directional drilling technology has been widely used in the laying, repair and replacement of various underground pipelines such as cables, pipelines and tunnels. Compared with the traditional excavation technology, it has the advantages of high efficiency, small damage, and can be used for crossing construction. And, the guiding and positioning technology is the most critical technology in horizontal directional drilling, which determines the success or failure of the entire construction. In this paper, by using the method of microseismic, we first simulate a single microseismic event to obtain the seismic record. Then, we take advantage of the solution of the eikonal equation by a finite difference method to calculate the theoretical travel time of the first arrival wave. Finally, the cross-correlation gather records and the first arrival time records are used for interferometric imaging and superposition to obtain the source location. A two-dimensional geological velocity model of a uniform medium is used to perform numerical simulation. Numerical experiments demonstrate the validity of the proposed method. Compared with the traditional methods, it has higher positioning accuracy and can achieve better control of trajectory of horizontal directional drilling.","PeriodicalId":304940,"journal":{"name":"2019 Symposium on Piezoelectrcity,Acoustic Waves and Device Applications (SPAWDA)","volume":"151 1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115599532","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
Analysis of Impermeable Crack in One-Dimensional Hexagonal Piezoelectric Quasicrystal 一维六方压电准晶体的不透水裂纹分析
2019 Symposium on Piezoelectrcity,Acoustic Waves and Device Applications (SPAWDA) Pub Date : 2019-01-01 DOI: 10.1109/SPAWDA.2019.8681801
Shuai Chen, Qiaoyun Zhang, GuangTao Xu, C. Fan
{"title":"Analysis of Impermeable Crack in One-Dimensional Hexagonal Piezoelectric Quasicrystal","authors":"Shuai Chen, Qiaoyun Zhang, GuangTao Xu, C. Fan","doi":"10.1109/SPAWDA.2019.8681801","DOIUrl":"https://doi.org/10.1109/SPAWDA.2019.8681801","url":null,"abstract":"In this paper, we analyze an electrically impermeable crack model in one-dimensional (1D) hexagonal piezoelectric quasicrystal and derive the solutions in terms of the extended Stroh formalism. Then, the extended intensity factor is obtained. The extended stress, extended crack opening displacement near the crack tip, and J-integral or energy release rate are all expressed by the intensity factor. Numerical calculations are used to investigate the distributions of extended stress near the right crack tip and the influence of different field loads on the energy release rate.","PeriodicalId":304940,"journal":{"name":"2019 Symposium on Piezoelectrcity,Acoustic Waves and Device Applications (SPAWDA)","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125769834","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
In-Plane Free Vibrations of Curved Beams by Rayleigh-Ritz Method 曲面梁面内自由振动的瑞利-里兹法
2019 Symposium on Piezoelectrcity,Acoustic Waves and Device Applications (SPAWDA) Pub Date : 2019-01-01 DOI: 10.1109/SPAWDA.2019.8681787
Shu-dong Ding, Jinghui Wu, Longtao Xie, Yangyang Zhang, R. Wu, Ji Wang
{"title":"In-Plane Free Vibrations of Curved Beams by Rayleigh-Ritz Method","authors":"Shu-dong Ding, Jinghui Wu, Longtao Xie, Yangyang Zhang, R. Wu, Ji Wang","doi":"10.1109/SPAWDA.2019.8681787","DOIUrl":"https://doi.org/10.1109/SPAWDA.2019.8681787","url":null,"abstract":"Curved beams are frequently used structural elements in traditional and emerging fields of civil and mechanical engineering with usual requirements of vibration and deformation analyses utilizing the beam theory. There are challenges in such analyses due to complex equations with curved arcs and numerical methods in case analytical solutions are not available. In this study, curved beams with commonly encountered arcs are studied for free vibrations with featured frequencies and mode shapes as the objectives of calculations. The Rayleigh-Ritz method is used with polynomial functions as the deformation, and accurate frequencies and mode shapes are obtained from convergent and verified solutions. It is the objective of this study that the method will be extended to a long, curved, and periodic beam for its free vibrations for in-depth understanding of vibrations of such unusual but ubiquitous structures from recent technological advances.","PeriodicalId":304940,"journal":{"name":"2019 Symposium on Piezoelectrcity,Acoustic Waves and Device Applications (SPAWDA)","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116021935","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
Application of Multigene Genetic Programming for Estimating Elastic Modulus of Reservoir Rocks 多基因遗传规划在储层弹性模量估算中的应用
2019 Symposium on Piezoelectrcity,Acoustic Waves and Device Applications (SPAWDA) Pub Date : 2019-01-01 DOI: 10.1109/SPAWDA.2019.8681879
Nuo Li, Hao Chen, Jian-qiang Han
{"title":"Application of Multigene Genetic Programming for Estimating Elastic Modulus of Reservoir Rocks","authors":"Nuo Li, Hao Chen, Jian-qiang Han","doi":"10.1109/SPAWDA.2019.8681879","DOIUrl":"https://doi.org/10.1109/SPAWDA.2019.8681879","url":null,"abstract":"Based on the Multigene genetic programming (MGGP) method, the static elastic moduli (Young’s moduli) of reservoir sandstones are estimated with the bulk densities, porosities and P-wave velocities data. A analytical expression for static moduli is obtained by evolution according to the method, and the static moduli are calculated by the expression. Then the calculation results are compared with those obtained by experimental and empirical methods. It shows that MGGP method is more accurate than the traditional empirical relation between dynamic and static parameters. Furthermore, MGGP requires less input parameters. For example, S-wave velocities are not necessary. So the method reduce the error induced by the inaccurate or missing of S-wave velocities.","PeriodicalId":304940,"journal":{"name":"2019 Symposium on Piezoelectrcity,Acoustic Waves and Device Applications (SPAWDA)","volume":"133 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122333402","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
Novel Cuts of Triply-Rotated Quartz Crystal for Resonators With Ideal Cubic Frequency-Temperature Relations 具有理想三次频率-温度关系的谐振器的新型三旋转石英晶体切割
2019 Symposium on Piezoelectrcity,Acoustic Waves and Device Applications (SPAWDA) Pub Date : 2019-01-01 DOI: 10.1109/SPAWDA.2019.8681866
Shao-yun Wang, Longtao Xie, Liang-meng Zhang, R. Wu, Jianke Du, Ji Wang
{"title":"Novel Cuts of Triply-Rotated Quartz Crystal for Resonators With Ideal Cubic Frequency-Temperature Relations","authors":"Shao-yun Wang, Longtao Xie, Liang-meng Zhang, R. Wu, Jianke Du, Ji Wang","doi":"10.1109/SPAWDA.2019.8681866","DOIUrl":"https://doi.org/10.1109/SPAWDA.2019.8681866","url":null,"abstract":"A systematic method of searching novel cuts of quartz crystal is proposed to explain the discovery of the existing cuts including AT- and SC-cut, and a few popular cuts in products on market. It is also found that some curves on which the cuts have the same frequency-temperature relation as that of the AT- and SC-cut quartz resonators and the inflection temperature cover a quite wide range. Finally, using this method, we found a novel cut whose frequency-temperature relation is much better than the AT- and SC-cut quartz crystal resonators. The temperature range that the absolute value of frequency shifts is smaller than 10ppm for this novel cut from −70°C to 130°C and the frequency constant is 35% higher than the AT-cut resonator.","PeriodicalId":304940,"journal":{"name":"2019 Symposium on Piezoelectrcity,Acoustic Waves and Device Applications (SPAWDA)","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131900543","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
Multi-Scale Convolutional Neural Networks Aggregation For Hyperspectral Images Classification 基于多尺度卷积神经网络聚合的高光谱图像分类
2019 Symposium on Piezoelectrcity,Acoustic Waves and Device Applications (SPAWDA) Pub Date : 2019-01-01 DOI: 10.1109/SPAWDA.2019.8681842
Baitao Liu, Wulin Zhang
{"title":"Multi-Scale Convolutional Neural Networks Aggregation For Hyperspectral Images Classification","authors":"Baitao Liu, Wulin Zhang","doi":"10.1109/SPAWDA.2019.8681842","DOIUrl":"https://doi.org/10.1109/SPAWDA.2019.8681842","url":null,"abstract":"Hyperspectral image feature extraction and classification is an important part in remote sensing field, and convolutional neural networks (CNNs) show their advantages in it. However, it is still affected by the lack of training samples, which may lead to the occurrence of overfitting. This issue gets more serious when dealing with high-dimensional data such as HSI. And the single scale of the input data ignores the abundance of multi-scale spatial information. In response to the above problems, we propose a multi-scale convolutional neural network method. And the method can extract multiple scale areas centered on the pixel to be classified. Then it adjusts the areas to the same size and inputs the adjusted data into the standard convolutional neural network for training and testing. Experimental results indicate that proposed method boost the performances in terms of classification accuracies.","PeriodicalId":304940,"journal":{"name":"2019 Symposium on Piezoelectrcity,Acoustic Waves and Device Applications (SPAWDA)","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134444739","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
A Novel Efficient Approach for Defect Detection in Pipeline Structures Using Guided Ultrasonic Waves 一种新的有效的管道结构缺陷检测方法——超声导波
2019 Symposium on Piezoelectrcity,Acoustic Waves and Device Applications (SPAWDA) Pub Date : 2019-01-01 DOI: 10.1109/SPAWDA.2019.8681865
Yihui Da, Gui-rong Dong, Bin Wang, Dianzi Liu, Z. Qian
{"title":"A Novel Efficient Approach for Defect Detection in Pipeline Structures Using Guided Ultrasonic Waves","authors":"Yihui Da, Gui-rong Dong, Bin Wang, Dianzi Liu, Z. Qian","doi":"10.1109/SPAWDA.2019.8681865","DOIUrl":"https://doi.org/10.1109/SPAWDA.2019.8681865","url":null,"abstract":"Detection of defects is a most important task in engineering subjects because a very tiny flaw in a structure might lead to a disaster at a later stage. In this paper, a novel, efficient and effective approach using guided ultrasonic waves for defect detection in pipeline structures is proposed. Based on boundary integral equations and Fourier transform of space-wavenumber domain, this developed method for quantitative detection of defects comprises three stages: first, theoretical foundation of quantitative detection is established using the boundary integral equations and the term in the integral is defined as B(k), k for wavenumber, according to Bom approximation. Subsequently, B(k) of a known defect can be written as B0(k) by Fourier transform of space-wavenumber domain to approximately represent the feature of an unknown defect in wavenumber domain. Finally, by combining B0(k) and reflection coefficients C(k), the location and shape of the unknown defect can be efficiently and effectively reconstructed. Several examples have been tested to demonstrate the correctness of the proposed methodology. It is concluded that the general two-dimensional surface defects can be efficiently detected by this novel approach.","PeriodicalId":304940,"journal":{"name":"2019 Symposium on Piezoelectrcity,Acoustic Waves and Device Applications (SPAWDA)","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133373262","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
Quantitative Evaluation Method of Seismic Resilience for Critical Projects-Case Study Regarding the Urban Water Supply System 关键工程抗震弹性定量评价方法——以城市供水系统为例
2019 Symposium on Piezoelectrcity,Acoustic Waves and Device Applications (SPAWDA) Pub Date : 2019-01-01 DOI: 10.1109/SPAWDA.2019.8681804
Xirong Bi, R. Wen, Yefei Ren, Kun Ji
{"title":"Quantitative Evaluation Method of Seismic Resilience for Critical Projects-Case Study Regarding the Urban Water Supply System","authors":"Xirong Bi, R. Wen, Yefei Ren, Kun Ji","doi":"10.1109/SPAWDA.2019.8681804","DOIUrl":"https://doi.org/10.1109/SPAWDA.2019.8681804","url":null,"abstract":"Four attributes of the concept of resilience were reviewed regarding redundancy, robustness, rapidity, and intelligence respectively. Studies about three main well-acknowledged evaluation indicators for critical projects resilience were then summarized including probability of resistance to earthquake, post-disaster consequences and recovery time. A quantitative evaluation method for seismic resilience was then introduced to construct resilience curves. To illustrate the whole procedure, the post-earthquake resilience performance of one urban water supply system in China was analyzed as an example case. The earthquake damage rate of the system was calculated concerning the site condition, pipe diameter and macro-seismic intensity as parameters. The resilience curves were then derived under different damage rate. It turns out that the damage ratio has significant impact on the robustness of the system’s resilience, and thus affect the recovery time.","PeriodicalId":304940,"journal":{"name":"2019 Symposium on Piezoelectrcity,Acoustic Waves and Device Applications (SPAWDA)","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129002536","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
Controlled Aggregation And Transportation Of Nanoparticles Using Ultrasonic Needle Probe 利用超声探针控制纳米颗粒的聚集和运输
2019 Symposium on Piezoelectrcity,Acoustic Waves and Device Applications (SPAWDA) Pub Date : 2019-01-01 DOI: 10.1109/SPAWDA.2019.8681868
Xiaomin Qi, Q. Tang, Pengzhan Liu, I. Minin, O. Minin, Jun-hui Hu
{"title":"Controlled Aggregation And Transportation Of Nanoparticles Using Ultrasonic Needle Probe","authors":"Xiaomin Qi, Q. Tang, Pengzhan Liu, I. Minin, O. Minin, Jun-hui Hu","doi":"10.1109/SPAWDA.2019.8681868","DOIUrl":"https://doi.org/10.1109/SPAWDA.2019.8681868","url":null,"abstract":"Efficient and reproducible aggregation of nanoscale materials and controlled transportation of the aggregated nano materials has huge potential applications in nano fabrication. Here we report an ultrasound based strategy to aggregate nanoparticles at an arbitrary location at the interface between a non-vibrating substrate and water film, and to transport the aggregated spot freely at the interface. The strategy employs the acoustic streaming, which is generated by an ultrasonic needle probe in vibration. In the experiments, the Si nanoparticles are aggregated under the ultrasonic needle probe at a desired location, forming a round spot of nano materials, and the round spot can be transported through an arbitrary path at the interface by moving the device. The dependencies of the acoustic streaming field around the ultrasonic needle probe on the parameters are clarified by numerical simulations.","PeriodicalId":304940,"journal":{"name":"2019 Symposium on Piezoelectrcity,Acoustic Waves and Device Applications (SPAWDA)","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116686771","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
Simulation Study on Wideband Transducer with Longitudinal-Flexural Coupling Vibration 宽带纵向-弯曲耦合振动换能器仿真研究
2019 Symposium on Piezoelectrcity,Acoustic Waves and Device Applications (SPAWDA) Pub Date : 2019-01-01 DOI: 10.1109/SPAWDA.2019.8681863
Y. Gou, Yu-yu Dai
{"title":"Simulation Study on Wideband Transducer with Longitudinal-Flexural Coupling Vibration","authors":"Y. Gou, Yu-yu Dai","doi":"10.1109/SPAWDA.2019.8681863","DOIUrl":"https://doi.org/10.1109/SPAWDA.2019.8681863","url":null,"abstract":"This paper designed a longitudinal bending coupled piezoelectric transducer. The transducer is composed of a rear metal block, a longitudinally polarized piezoelectric ceramic piece and a slotted round front cover. The longitudinal vibration of the piezoelectric oscillators drive the front cover to generate bending vibration to widen the operating frequency band while reducing the fluctuation of transmission voltage response. In this paper, the design method of this multimode coupled transducer is given, and the method is verified by numerical simulation. The results show that the analytical theory and numerical simulation results have good consistency. This longitudinal-flexural coupled vibration transducer widens the bandwidth while preserving the emission voltage response.","PeriodicalId":304940,"journal":{"name":"2019 Symposium on Piezoelectrcity,Acoustic Waves and Device Applications (SPAWDA)","volume":"163 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114319900","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
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