3,788 research outputs found
The leptonic decay using the principle of maximum conformality
In the paper, we study the leptonic decay width
by using the principle of maximum
conformality (PMC) scale-setting approach. The PMC adopts the renormalization
group equation to set the correct momentum flow of the process, whose value is
independent to the choice of the renormalization scale and its prediction thus
avoids the conventional renormalization scale ambiguities. Using the known
next-to-next-to-next-to-leading order perturbative series together with the PMC
single scale-setting approach, we do obtain a renormalization scale independent
decay width, keV,
where the error is squared average of those from
, GeV and the choices of
factorization scales within of their central values. To compare with
the result under conventional scale-setting approach, this decay width agrees
with the experimental value within errors, indicating the importance of a
proper scale-setting approach.Comment: 6 pages, 4 figure
High-order localized spoof surface plasmon resonances and experimental verifications
We theoretically demonstrated and experimentally verified high-order radial
spoof localized surface plasmon resonances supported by textured metal
particles. Through an effective medium theory and exact numerical simulations,
we show the emergence of these geometrically-originated electromagnetic modes
at microwave frequencies. The occurrence of high-order radial spoof plasmon
resonances is experimentally verified in ultrathin disks. Their spectral and
near-field properties are characterized experimentally, showing an excellent
agreement with theoretical predictions. Our findings shed light into the nature
of spoof localized surface plasmons, and open the way to the design of
broadband plasmonic devices able to operate at very different frequency
regimes.Comment: 29 pages, 10 figure
The Compressive Strength of Cement–Slag–Calcium Sulphoaluminate Ternary System
At present, there is an increasing interest on the use of calcium sulphoaluminate (C4A3) was prepared in laboratory. Different dosages of steel slag and C4A3 can improve the strength of cement. Larger C4A3 dosage is 5%. In ternary system, C4A3$ has no obvious improvement, while 5% dosage could improve the strength a little
An investigation of the mathematical elements of the Dai culture south-west Yunnan province, China
Dai ethnic mathematical culture is an important part of Dai ethnic culture. Mathematical elements show in their daily life. Through a research project of the Yunnan Dehong Dai people in southwest China, We collected the first-hand information, tried to do a small investigative study, and collected mathematics teaching resources that is useful to primary and secondary schools students on mathematics learning in this minority areas. Keyword: Dai ethnic; Mathematical culture; Primary and secondary schools; Teaching resources
Tensor-Based Multi-Modality Feature Selection and Regression for Alzheimer's Disease Diagnosis
The assessment of Alzheimer's Disease (AD) and Mild Cognitive Impairment
(MCI) associated with brain changes remains a challenging task. Recent studies
have demonstrated that combination of multi-modality imaging techniques can
better reflect pathological characteristics and contribute to more accurate
diagnosis of AD and MCI. In this paper, we propose a novel tensor-based
multi-modality feature selection and regression method for diagnosis and
biomarker identification of AD and MCI from normal controls. Specifically, we
leverage the tensor structure to exploit high-level correlation information
inherent in the multi-modality data, and investigate tensor-level sparsity in
the multilinear regression model. We present the practical advantages of our
method for the analysis of ADNI data using three imaging modalities (VBM- MRI,
FDG-PET and AV45-PET) with clinical parameters of disease severity and
cognitive scores. The experimental results demonstrate the superior performance
of our proposed method against the state-of-the-art for the disease diagnosis
and the identification of disease-specific regions and modality-related
differences. The code for this work is publicly available at
https://github.com/junfish/BIOS22
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