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3 article(s) from Qian, Jianqiang

Enhancing higher-order modal response in multifrequency atomic force microscopy with a coupled cantilever system

Wendong Sun,
Jianqiang Qian,
Yingzi Li,
Yanan Chen,
Zhipeng Dou,
Rui Lin,
Peng Cheng,
Xiaodong Gao,
Quan Yuan and
Yifan Hu

Beilstein J. Nanotechnol. 2024, 15, 694–703, doi:10.3762/bjnano.15.57

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Figure 1: (a) Microcantilever beams with different inputs (purple) and outputs (red). (b) Diagram of the brid...

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Figure 2: Bode plot of the response of the macroscale bridge/cantilever coupled system.

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Figure 3: Lower surface schematic diagram of the macroscale bridge/cantilever coupled system model. The total...

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Figure 4: The first two orders of modal frequency response of a traditional rectangular cantilever beam (blue...

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Figure 5: The modal response of the left side of the coupled system for lengths l of 1.50, 2.00, 2.50, 2.75, ...

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Figure 6: (a) Influence of different excitation positions l_a of the coupled system on the modal response when ...

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Figure 7: Experimental setup of the macroscale cantilever platform.

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Figure 8: Image of the macroscale cantilever. The left side is clamped by (a) a size-adjustable optical dry p...

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Figure 9: Sweep results for (a) the traditional rectangular cantilever beam and (b) the bridge/cantilever cou...

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Figure 10: First two orders of frequency response of traditional cantilever beam (blue) and bridge/cantilever ...

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Figure 11: Experimental results of the first two orders of frequency response for different lengths of the lef...

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Figure 12: Experimental influence of excitation position l_a on the first two orders of modal response when l =...

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Full Research Paper

Published 17 Jun 2024

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Reducing molecular simulation time for AFM images based on super-resolution methods

Zhipeng Dou,
Jianqiang Qian,
Yingzi Li,
Rui Lin,
Jianhai Wang,
Peng Cheng and
Zeyu Xu

Beilstein J. Nanotechnol. 2021, 12, 775–785, doi:10.3762/bjnano.12.61

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Figure 1: Snapshot of the AM mode molecular dynamics simulation. Z_c is the distance between the virtual atom ...

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Figure 2: Mathematical model of compressed-sensing AFM imaging. The image obtained by AFM can be regarded as ...

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Figure 3: The block diagram of fast molecular simulation method for AFM imaging based on Bayesian compressed ...

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Figure 4: The flow chart of the proposed SRCNN reconstruction method. First, the low-resolution simulated ima...

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Figure 5: The interaction energy maps of graphite and gold samples obtained by molecular dynamics simulation....

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Figure 6: The reconstructed results of Figure 5a with size of 51 × 51. The first column is the original image, the sec...

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Figure 7: The reconstructed results of Figure 5h with size of 101 × 101. The first line is the result of the BCS algor...

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Figure 8: Reconstructed results of the other seven images. The upper image of each group shows the result of ...

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Full Research Paper

Published 29 Jul 2021

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A novel method to remove impulse noise from atomic force microscopy images based on Bayesian compressed sensing

Yingxu Zhang,
Yingzi Li,
Zihang Song,
Zhenyu Wang,
Jianqiang Qian and
Junen Yao

Beilstein J. Nanotechnol. 2019, 10, 2346–2356, doi:10.3762/bjnano.10.225

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Figure 1: The schematic of removing impulse noise from AFM images based on Bayesian compressed sensing.

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Figure 2: Mathematical model of compressed sensing AFM imaging.

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Figure 3: Comparison of denoising between the interval-BCS denoising, the median filter and the adaptive medi...

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Figure 4: Comparison of interval-BCS denoising with different upper and lower limits. (a) Original image. (b)...

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Figure 5: Denoised images. (a1–d1) Original images. (a2–d2) Images with added impulse noise with a density of...

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Figure 6: Denoised results comparison of the proposed method, the median filter and the adaptive median filte...

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Figure 7: (a) AFM image with added noise of high density. (b) Denoised image obtained by the interval-BCS den...

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Figure 8: (a) AFM image with added noise. (b) Denoised image obtained by the interval-BCS denoising. (c) Deno...

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Full Research Paper

Published 28 Nov 2019

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