111,867 research outputs found
Replication Data for: Observation of returning Thouless pumping
No full textThis repository contains the data and code used for the analyses presented in the manuscript "Cheng, Z., Yue, S., Long, Y. et al. Observation of returning Thouless pumping. Nat Commun 16, 9669 (2025). https://doi.org/10.1038/s41467-025-64671-w"
It is also related to preprint arXiv:2505.0680
Abnormal temperature-dependent stability of on-plastic a-Si:H thin film transistors fabricated at 150 ?C
No full textSuppressing influence of measurement noise on vibration-based damage detection involving higher-order derivatives
No full textAuthor name used in this publication: Cheng, Li.2012-2013 > Academic research: refereed > Publication in refereed journalVersion of RecordPublishedPublisher permissio
Compact asymmetric metamaterial circular polarization transformer based on twisted double split-ring resonator structure
No full textIn this paper, a compact asymmetric metamaterial circular polarization transformer using twisted double square split-ring resonator was proposed and investigated experimentally and numerically. This compact structure can convert an incident linearly y-polarized (x-polarized) wave propagation along the −z (+z) direction to the transmitted right-hand circular polarization (RCP) and left-hand circular polarization (LCP) at 7.3 and 8.3 GHz, respectively. The difference in level between the transmitted waves with LCP and RCP can reach more than 35 dB at the resonant frequencies. The experiment results are in good agreement with the numerical results. The surface current distributions on the structure are analyzed to illustrate this linear to circular transformation phenomenon.Zheng Ze Cheng, Yong Zhi Cheng and Chonghua Fan
An output-only ARX model-based sensor fusion framework on structural dynamic measurements using distributed optical fiber sensors and fiber Bragg grating sensors
No full textThe advent of distributed optical fiber sensing technologies has made continuous and dense measurement possible, and has a very broad application prospect in the field of structural health monitoring. However, not all of them are able to guarantee measurement accuracy in a good condition compared to traditional fiber sensors, such as FBGs (Fiber Bragg Grating sensor), strain gauges, etc. In our previous study (Cheng et al., 2019) of the calibration on static measurements for distributed sensors, it turns out that the signal to noise ratio from each single sensing point has proven to be much higher for FBGs than for distributed sensors. This paper presents a novel sensor fusion approach aiming to enhance the measurement quality of distributed fiber optical sensors in dynamic strain measurement. First of all, an output-only common-structured ARX (Auto-Regressive with exogenous input) model for dynamic MDOF (Multiple Degree of Freedom) systems with n degrees of freedom is studied where one of the measurement outputs is utilized as the input rather than actual external force, thus avoiding the inaccessibility of input signals in real structural engineering campaigns. After applying this model into a measurement system using a limited number of sensing points but with high fidelity, the outputs at unobserved points can then be roughly predicted using various curve fitting techniques on the ARX model coefficients against structural positions. However, the quality of the predicted performance cannot be guaranteed. Benefiting from a dense measurement but with low fidelity, the variation trend of the built ARX model coefficients against structural locations can be evaluated. Combined with EKR interpolation technique, the built ARX model from a high-fidelity system is then coupled to the evaluated trend of ARX model coefficients from a low-fidelity system, which leads to a further enhancement of its measurement quality at the unobserved points. To verify the feasibility and effectiveness of the presented sensor fusion approach, numerical studies on a 10-DOF MDOF system are conducted, indicating a satisfactory forecast with very small values of mean square errors for the unobserved DOFs. To further investigate the benefits of the proposed sensor fusion approach, experimental activities on a steel-beam are performed, aiming to enhance/calibrate the measurement performance on distributed fiber sensor (low fidelity) by incorporating four FBG sensors (high fidelity) as a calibration reference. The experimental results show that the intervention of the proposed approach yields significant improvement in the measurement quality for distributed fiber optic sensors
The Benefits of Being Economics Professor A (and not Z)
No full textAlphabetic name ordering on multi-authored academic papers, which is the convention in the economics discipline and various other disciplines, is to the advantage of people whose last name initials are placed early in the alphabet. As it turns out, Professor A, who has been a first author more often than Professor Z, will have published more articles and experienced afaster growth rate over the course of her career as a result of reputation and visibility. Moreover, authors know that name ordering matters and indeed take ordering seriously: Several characteristics of an author group composition determine the decision to deviate from the default alphabetic name order to a significant extent.performance measurement, incentives, economists, name ordering
Optical exciton molecules in three-dimensional Kerr-nonlinear photonic crystals
No full textThree-dimensional Kerr-nonlinear photonic crystals support a new kind of quantum gap solitons. Such SD-quantum gap solitons are described by an approximate Bethe-ansatz solution of the quantized nonlinear-field Hamiltonian under the effective mass approximation. 'Their main manifestations are predicted: (i) a series of discrete transmission peaks in the band gap, which progresses linearly with the diphoton number; (ii) Bessel-function dependence of the intensity correlation function on the detector separation.http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000077610900007&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=8e1609b174ce4e31116a60747a720701Physics, MultidisciplinarySCI(E)中国科学引文数据库(CSCD)1ARTICLE4517-5223
A novel model for porous scaffolds to match the mechanical anisotropy and the hierarchical structure of bone
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