Your browser doesn't support javascript.
loading
Show: 20 | 50 | 100
Results 1 - 3 de 3
Filter
Add more filters










Database
Language
Publication year range
1.
Beilstein J Nanotechnol ; 13: 1408-1417, 2022.
Article in English | MEDLINE | ID: mdl-36483638

ABSTRACT

Herein, we theoretically demonstrate that a double-layer symmetric gratings (DLSG) resonator consisting of a low-refractive-index layer sandwiched between two high-contrast gratings (HCG) layers, can host dual-band high-quality (Q) factor resonance. We find that the artificial bound states in the continuum (BIC) and Fabry-Pérot BIC (FP-BIC) can be induced by optimizing structural parameters of DLSG. Interestingly, the artificial BIC is governed by the spacing between the two rectangular dielectric gratings, while the FP-BIC is achieved by controlling the cavity length of the structure. Further, the two types of BIC can be converted into quasi-BIC (QBIC) by either changing the spacing between adjacent gratings or changing the distance between the upper and lower gratings. The simulation results show that the dual-band high-performance sensor is achieved with the highest sensitivity of 453 nm/RIU and a maximum figure of merit (FOM) of 9808. Such dual-band high-Q resonator is expected to have promising applications in multi-wavelength sensing and nonlinear optics.

2.
J Environ Public Health ; 2022: 4502628, 2022.
Article in English | MEDLINE | ID: mdl-36081418

ABSTRACT

Under the dual background of Britain's blatant "Brexit" and the steady "expansion" of the European Union (EU) audit list, the economic effect of the development of regional alliances, in the end, is a question worthy of in-depth discussion. Using data from a sample of 27 EU member states from 2000 to 2018, this study examines and compares the impact of EU enlargement on economic growth for countries as a whole, developed and developing countries, and Central and Eastern European (CEE) countries using a multi-period difference-in-difference (DID) method and explores the mechanisms underlying that. The results show that EU enlargement contributes to the expected regional economic growth, and the effect is more evident in developed countries and CEE countries; the robustness of the results is tested by the dynamic effect test and counterfactual method; EU enlargement improves the spatial allocation of factor markets through regional integration, increases productivity, and positively promotes the overall national economic growth. As a typical quasi-natural experiment of the development of regional integration, the research results of this study on the enlargement of the EU provide a useful reference for the promotion of the development of cross-administrative integration around the world.


Subject(s)
Economic Development , Efficiency , Europe , European Union
3.
J Int Med Res ; 49(8): 3000605211027878, 2021 Aug.
Article in English | MEDLINE | ID: mdl-34369189

ABSTRACT

OBJECTIVE: This article aimed to study the clinicopathological features, immunophenotypes, and differential diagnoses of plexiform fibromyxoma (PF). METHODS: We searched clinical and pathology databases of our hospital for patients with histologically confirmed PF from 2007 to 2020 and reviewed the relevant English and Chinese language literature. RESULTS: Two cases of PF were identified, a 67-year-old woman and a 23-year-old man. Both patients presented with melena and anemia and underwent partial gastrectomy. Histologically, the tumors exhibited a plexiform growth pattern in the gastric submucosa and the presence of bland-looking spindle cells in the fibromyxoid stroma with the formation of small blood vessels. Immunohistochemically, the two cases were strongly positive for vimentin, smooth muscle actin, and muscle-specific actin and negative for CD117, discovered on gastrointestinal stromal tumors protein 1, CD34, CD10, S100, desmin, H-caldesmon, estrogen receptor, progesterone receptor, ß-catenin, and cytokeratin. CONCLUSIONS: PF is a rare mesenchymal tumor of the stomach that can be distinguished from other gastrointestinal mesenchymal tumors based on its distinctive morphology and immunophenotype.


Subject(s)
Fibroma , Gastrointestinal Stromal Tumors , Stomach Neoplasms , Aged , Diagnosis, Differential , Female , Fibroma/diagnostic imaging , Fibroma/surgery , Gastrectomy , Humans , Male , Stomach Neoplasms/diagnosis , Stomach Neoplasms/surgery , Young Adult
SELECTION OF CITATIONS
SEARCH DETAIL
...