Chinese Physics B最新文献_第6页

High-visibility ghost imaging with phase-controlled discrete classical light sources 利用相位控制离散经典光源进行高可见度鬼影成像

IF 1.7 4区物理与天体物理

Chinese Physics B Pub Date : 2024-07-01 DOI: 10.1088/1674-1056/ad4631

Xueying Wu, Yue Zhao, Liming Li

引用次数: 0

Large-scale particle trapping by acoustic vortices with a continuously variable topological charge 带有连续可变拓扑电荷的声学漩涡对大规模粒子的捕获

IF 1.7 4区物理与天体物理

Chinese Physics B Pub Date : 2024-07-01 DOI: 10.1088/1674-1056/ad5aef

Haofei Zhuang, Qingyuan Zhang, Gehao Hu, Qingdong Wang, Libin Du

{"title":"Large-scale particle trapping by acoustic vortices with a continuously variable topological charge","authors":"Haofei Zhuang, Qingyuan Zhang, Gehao Hu, Qingdong Wang, Libin Du","doi":"10.1088/1674-1056/ad5aef","DOIUrl":"https://doi.org/10.1088/1674-1056/ad5aef","url":null,"abstract":"Strengthened directivity with higher-order side lobes can be generated by the transducer with a larger radius at a higher frequency. The multi-annular pressure distributions are displayed in the cross-section of the acoustic vortices (AVs) which are formed by side lobes. In the near field, particles can be trapped in the valley region between the two annuli of the pressure peak, and cannot be moved to the vortex center. In this paper, a trapping method based on a sector transducer array is proposed, which is characterized by the continuously variable topological charge (CVTC). This acoustic field can not only enlarge the range of particle trapping but also improve the aggregation degree of the trapped particles. In the experiments, polyethylene particles with a diameter of 0.2 mm are trapped into the multi-annular valleys by the AV with a fixed topological charge. Nevertheless, by applying the CVTC, particles outside the radius of the AV can cross the pressure peak successfully and move to the vortex center. Theoretical studies are also verified by the experimental particles trapping using the AV with the continuous variation of three topological charges, and suggest the potential application of large-scale particle trapping in biomedical engineering.","PeriodicalId":10253,"journal":{"name":"Chinese Physics B","volume":"60 1","pages":""},"PeriodicalIF":1.7,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141571669","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Symmetry quantification and segmentation in STEM imaging through Zernike moments 通过 Zernike 矩对 STEM 成像进行对称性量化和分割

IF 1.7 4区物理与天体物理

Chinese Physics B Pub Date : 2024-07-01 DOI: 10.1088/1674-1056/ad51f4

Jiadong Dan, Cheng Zhang, Xiaoxu Zhao, N. Duane Loh

引用次数: 0

Quantitative analysis of laser-generated ultrasonic wave characteristics and their correlation with grain size in polycrystalline materials 定量分析激光产生的超声波特性及其与多晶材料晶粒尺寸的相关性

IF 1.7 4区物理与天体物理

Chinese Physics B Pub Date : 2024-07-01 DOI: 10.1088/1674-1056/ad50bd

Zhaowen Xu, Xue Bai, Jian Ma, Zhuangzhuang Wan, Chaoqun Wang

{"title":"Quantitative analysis of laser-generated ultrasonic wave characteristics and their correlation with grain size in polycrystalline materials","authors":"Zhaowen Xu, Xue Bai, Jian Ma, Zhuangzhuang Wan, Chaoqun Wang","doi":"10.1088/1674-1056/ad50bd","DOIUrl":"https://doi.org/10.1088/1674-1056/ad50bd","url":null,"abstract":"Quantitative relationship between nanosecond pulsed laser parameters and the characteristics of laser-generated ultrasonic waves in polycrystalline materials was evaluated. The high energy of the pulsed laser with a large irradiation spot simultaneously generated ultrasonic longitudinal and shear waves at the epicenter under the slight ablation regime. An optimized denoising technique based on wavelet thresholding and variational mode decomposition was applied to reduce noise in shear waves with a low signal-to-noise ratio. An approach for characterizing grain size was proposed using spectral central frequency ratio (SCFR) based on time-frequency analysis. The results demonstrate that the generation regime of ultrasonic waves is not solely determined by the laser power density; even at high power densities, a high energy with a large spot can generate an ultrasonic waveform dominated by the thermoelastic effect. This is ascribed to the intensification of the thermoelastic effect with the proportional increase in laser irradiation spot area for a given laser power density. Furthermore, both longitudinal and shear wave SCFRs are linearly related to grain size in polycrystalline materials; however, the shear wave SCFR is more sensitive to finer-grained materials. This study holds great significance for evaluating metal material properties using laser ultrasound.","PeriodicalId":10253,"journal":{"name":"Chinese Physics B","volume":"34 1","pages":""},"PeriodicalIF":1.7,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141883992","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Model-driven CT reconstruction algorithm for nano-resolution x-ray phase contrast imaging 用于纳米分辨率 X 射线相衬成像的模型驱动 CT 重建算法

IF 1.7 4区物理与天体物理

Chinese Physics B Pub Date : 2024-07-01 DOI: 10.1088/1674-1056/ad3dcc

Yuhang Tan, Xuebao Cai, Jiecheng Yang, Ting Su, Hairong Zheng, Dong Liang, Peiping Zhu, Yongshuai Ge

{"title":"Model-driven CT reconstruction algorithm for nano-resolution x-ray phase contrast imaging","authors":"Yuhang Tan, Xuebao Cai, Jiecheng Yang, Ting Su, Hairong Zheng, Dong Liang, Peiping Zhu, Yongshuai Ge","doi":"10.1088/1674-1056/ad3dcc","DOIUrl":"https://doi.org/10.1088/1674-1056/ad3dcc","url":null,"abstract":"The low-density imaging performance of a zone plate-based nano-resolution hard x-ray computed tomography (CT) system can be significantly improved by incorporating a grating-based Lau interferometer. Due to the diffraction, however, the acquired nano-resolution phase signal may suffer splitting problem, which impedes the direct reconstruction of phase contrast CT (nPCT) images. To overcome, a new model-driven nPCT image reconstruction algorithm is developed in this study. In it, the diffraction procedure is mathematically modeled into a matrix <italic toggle=\"yes\"><bold>B</bold></italic>, from which the projections without signal splitting can be generated invertedly. Furthermore, a penalized weighted least-square model with total variation (PWLS-TV) is employed to denoise these projections, from which nPCT images with high accuracy are directly reconstructed. Numerical experiments demonstrate that this new algorithm is able to work with phase projections having any splitting distances. Moreover, results also reveal that nPCT images of higher signal-to-noise-ratio (SNR) could be reconstructed from projections having larger splitting distances. In summary, a novel model-driven nPCT image reconstruction algorithm with high accuracy and robustness is verified for the Lau interferometer-based hard x-ray nano-resolution phase contrast imaging.","PeriodicalId":10253,"journal":{"name":"Chinese Physics B","volume":"51 1","pages":""},"PeriodicalIF":1.7,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141571670","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Quasi-three-dimensional hydrodynamics of the corona region of laser irradiation of a slab 板坯激光辐照电晕区的准三维流体力学

IF 1.7 4区物理与天体物理

Chinese Physics B Pub Date : 2024-07-01 DOI: 10.1088/1674-1056/ad4532

Xiao-Mei Dong, Ben-Jin Guan, Ying-Jun Li

引用次数: 0

Interface and mechanical degradation mechanisms of the silicon anode in sulfide-based solid-state batteries at high temperatures 硫化物固态电池硅阳极在高温下的界面和机械降解机制

IF 1.7 4区物理与天体物理

Chinese Physics B Pub Date : 2024-07-01 DOI: 10.1088/1674-1056/ad5276

Qiuchen Wang, Yuli Huang, Jing Xu, Xiqian Yu, Hong Li, Liquan Chen

{"title":"Interface and mechanical degradation mechanisms of the silicon anode in sulfide-based solid-state batteries at high temperatures","authors":"Qiuchen Wang, Yuli Huang, Jing Xu, Xiqian Yu, Hong Li, Liquan Chen","doi":"10.1088/1674-1056/ad5276","DOIUrl":"https://doi.org/10.1088/1674-1056/ad5276","url":null,"abstract":"Silicon (Si) is a competitive anode material owing to its high theoretical capacity and low electrochemical potential. Recently, the prospect of Si anodes in solid-state batteries (SSBs) has been proposed due to less solid electrolyte interphase (SEI) formation and particle pulverization. However, major challenges arise for Si anodes in SSBs at elevated temperatures. In this work, the failure mechanisms of Si-Li6PS5Cl (LPSC) composite anodes above 80 °C are thoroughly investigated from the perspectives of interface stability and (electro)chemo-mechanical effect. The chemistry and growth kinetics of Li<italic toggle=\"yes\">x</italic>Si|LPSC interphase are demonstrated by combining electrochemical, chemical and computational characterizations. Si and/or Si–P compound formed at Li<italic toggle=\"yes\">x</italic>Si|LPSC interface prove to be detrimental to interface stability at high temperatures. On the other hand, excessive volume expansion and local stress caused by Si lithiation at high temperatures damage the mechanical structure of Si-LPSC composite anodes. This work elucidates the behavior and failure mechanisms of Si-based anodes in SSBs at high temperatures and provides insights into upgrading Si-based anodes for application in SSBs.","PeriodicalId":10253,"journal":{"name":"Chinese Physics B","volume":"99 1","pages":""},"PeriodicalIF":1.7,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141883993","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Physics-embedded machine learning search for Sm-doped PMN-PT piezoelectric ceramics with high performance 嵌入物理学的机器学习搜索 Sm 掺杂的 PMN-PT 高性能压电陶瓷

IF 1.7 4区物理与天体物理

Chinese Physics B Pub Date : 2024-07-01 DOI: 10.1088/1674-1056/ad51f3

Rui Xin, Yaqi Wang, Ze Fang, Fengji Zheng, Wen Gao, Dashi Fu, Guoqing Shi, Jian-Yi Liu, Yongcheng Zhang

{"title":"Physics-embedded machine learning search for Sm-doped PMN-PT piezoelectric ceramics with high performance","authors":"Rui Xin, Yaqi Wang, Ze Fang, Fengji Zheng, Wen Gao, Dashi Fu, Guoqing Shi, Jian-Yi Liu, Yongcheng Zhang","doi":"10.1088/1674-1056/ad51f3","DOIUrl":"https://doi.org/10.1088/1674-1056/ad51f3","url":null,"abstract":"Pb(Mg1/3Nb2/3)O3–PbTiO3 (PMN-PT) piezoelectric ceramics have excellent piezoelectric properties and are used in a wide range of applications. Adjusting the solid solution ratios of PMN/PT and different concentrations of elemental doping are the main methods to modulate their piezoelectric coefficients. The combination of these controllable conditions leads to an exponential increase of possible compositions in ceramics, which makes it not easy to extend the sample data by additional experimental or theoretical calculations. In this paper, a physics-embedded machine learning method is proposed to overcome the difficulties in obtaining piezoelectric coefficients and Curie temperatures of Sm-doped PMN-PT ceramics with different components. In contrast to all-data-driven model, physics-embedded machine learning is able to learn nonlinear variation rules based on small datasets through potential correlation between ferroelectric properties. Based on the model outputs, the positions of morphotropic phase boundary (MPB) with different Sm doping amounts are explored. We also find the components with the best piezoelectric property and comprehensive performance. Moreover, we set up a database according to the obtained results, through which we can quickly find the optimal components of Sm-doped PMN-PT ceramics according to our specific needs.","PeriodicalId":10253,"journal":{"name":"Chinese Physics B","volume":"80 1","pages":""},"PeriodicalIF":1.7,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141884093","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Semiclassical approach to spin dynamics of a ferromagnetic S = 1 chain 铁磁 S = 1 链自旋动力学的半经典方法

IF 1.7 4区物理与天体物理

Chinese Physics B Pub Date : 2024-06-01 DOI: 10.1088/1674-1056/ad3c32

Chengchen Li, Yi Cui, Weiqiang Yu, Rong Yu

引用次数: 0

Detecting the quantum phase transition from the perspective of quantum information in the Aubry–André model 从奥布里-安德烈模型中的量子信息角度探测量子相变

IF 1.7 4区物理与天体物理

Chinese Physics B Pub Date : 2024-05-31 DOI: 10.1088/1674-1056/ad2f1f

Geng-Biao Wei, 庚彪韦, Liu Ye, 柳叶, Dong Wang and 栋王

引用次数: 0