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1881
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Channel Estimation and Pilot Design for Uplink Sparse Code Multiple Access System Based on Complex-Valued Sparse Autoencoder
Published 2025-01-01“…Compared with maximum likelihood channel estimation (MLE) of the linear model, the proposed method can achieve higher channel estimation accuracy with more sparse pilot structure. …”
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1883
Transformerless Step-Up Inverter Based On Switched-Capacitor Converter Technology
Published 2017-09-01“… In this paper the integration between a voltage source inverter (VSI) and a switched capacitor converter (SCC) is proposed to generate a sinusoidal waveform with a double peak voltage value at the converter output terminal, without the use of a transformer or a dc-dc boost converter. The novel structure (VSI-SCC) is designed as a transformerless step-up inverter with linear gain. …”
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1884
Effect of Viscous Dampers with Variable Capacity on the Response of Steel Buildings
Published 2025-03-01“…The objective of this study was to examine the seismic behavior of steel buildings equipped with linear and nonlinear viscous dampers that may exhibit variable capacity. …”
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1885
Phase-lag mixed integral equation of a generalized symmetric potential kernel and its physical meanings in (3+1) dimensions
Published 2025-02-01“…Currently, there has been no research conducted on the impact of time on the structure of the overall nucleus, nor has there been any investigation into the influence of time delay on the three-dimensional integral equation, considering the temporal changes. …”
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1886
Production and biological characteristics and genotoxic status of clam <i>Corbicula japonica</i> (Bivalvia, Corbiculidae) in the estuary of Avvakumovka River (Olga Bay, northwester...
Published 2016-12-01“…Settlements in different parts of estuary differ by abundance of C. japonica , its size-age structure, and growth rates. The maximum observed shell size was 53 mm, the maximum weight of mollusk - 43 g, the maximum age - 13 years. …”
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1887
Locality-Preserving Multiprojection Discriminant Analysis
Published 2025-03-01“…Linear discriminant analysis (LDA), as an effective feature extraction method, has been widely applied in high-dimensional data analysis. …”
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1888
Toward Spatio‐Temporally Consistent Multi‐Site Fire Danger Downscaling With Explainable Deep Learning
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1889
CPAP improves sleep stability and attenuates acute nocturnal hypertension (NBPF) in OSA, with maximal benefits in severe cases
Published 2025-07-01“…NBPF was defined as the number of events per hour where nocturnal systolic blood pressure (SBP) increased by >12 mmHg.Results(1) Baseline characteristics: N1%, N2%, SBP, DBP, and NBPF significantly increased, while R% and N3% significantly decreased with increasing severity of OSA (p < 0.05). (2) Overall efficacy: After CPAP treatment, N1% significantly decreased, N3% significantly increased, and DBP and NBPF significantly decreased (p < 0.05). (3) Subgroup analysis: All patients experienced significant reductions in MAI, N1%, N2%, and NBPF, and significant increases in R% after CPAP treatment (p < 0.05); N3% significantly increased in moderate and severe patients (p < 0.05); SBP and DBP improvements were most significant in severe patients (p < 0.05). (4) Correlation and linear regression analysis: NBPF was significantly correlated with sleep structure parameters, showing an independent positive correlation with MAI (β = 0.375, p < 0.001) and an independent negative correlation with N3% (β = −0.143, p = 0.001).ConclusionThe first night of positive airway pressure (PAP) therapy significantly improves sleep architecture and effectively reduces nocturnal blood pressure while suppressing acute systolic blood pressure (NBPF) elevations in OSA patients, especially those with severe disease.…”
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1890
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1891
OPTIMIZATION-BASED APPROACH TO TILING OF FINITE AREAS WITH ARBITRARY SETS OF WANG TILES
Published 2017-11-01“…While there are several algorithms for generation of finite-sized tilings, they exploit the specific structure of individual tile sets, which prevents their general usage. …”
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1892
Combined characterization of pore structurein deep medium-rank coal using mercury intrusion and liquid nitrogen adsorption methods and its pore fractal characteristics
Published 2025-01-01“…The pore structure parameters (specific surface area and pore volume) determined by mercury intrusion and liquid nitrogen adsorption methods showed a non-linear concave curve variation with increasing burial depth. …”
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1893
Revocable and traceable key-policy attribute-based encryption scheme
Published 2018-11-01“…The existing key-policy attribute-based encryption (KP-ABE) scheme can not balance the problem of attribute revocation and user identity tracking.Hence,a KP-ABE scheme which supported revocable and traceable was proposed.The scheme could revoke the user attributes without updating the system public key and user private key with a less update cost.Meanwhile,it could trace the user identity based on decryption key which could effectively prevent anonymous user key leakage problem.The proposed scheme was based on linear secret sharing scheme (LSSS),which was more efficient than tree-based access structure.Based on the deterministic q-BDHE hypothesis,the proposed scheme gave security proof until standard mode.Finally,compared with the existing KP-ABE scheme,the scheme has a shorter public key length,lower computational overhead and realizes the traceability function of user identity based on the revocable attribute,which has obvious advantages.…”
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1894
Localisation and classification of mixed far‐field and near‐field sources with sparse reconstruction
Published 2022-06-01“…First, utilising the structural characteristics of a uniform symmetric linear array, a fourth‐order cumulant (FOC) matrix is constructed, which decouples the angular information from the range parameters. …”
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1895
Тhe effect of cancer patients’ positioning accuracy during radiation therapy sessions using medical linear electron accelerators on the parameters of their individual 3D dose distr...
Published 2020-11-01“…Due to the rapid development and further improvement of radiation treatment technologies oncologists have an opportunity to precisely deliver individual dose distributions to the tumor, minimizing the doses obtained by critical organs and healthy structures. For the correct and successful application of these complex methods of radiation therapy, it was necessary to enforce the requirements for the technical and dosimetric parameters of the radiotherapy equipment. …”
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1896
Where you live shapes who you are: morphological changes in urban Triatoma infestans
Published 2025-06-01“…Centroid size analyses indicated that rural individuals exhibited larger body structures, a pattern generally consistent across sexes. …”
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1897
Active vibration control of an elastic piezoelectric beam subjected to multi-frequency excitation
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1898
Estimation of tensile mechanical parameters of existing masonry through the analysis of the collapse of Volterra�s urban walls
Published 2019-07-01“…The stretch of collapsed wall is modelled with finite elements by distinguishing the material composing the multi-leaf wall. Non-linear static analyses are carried out with the DIANA software considering different levels of hydraulic head up to reach the collapse of the structure. …”
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1899
Dynamic characterization of progressively damaged segmental masonry arches with one settled support: experimental and numerical analyses
Published 2020-01-01“…Then, a numerical procedure coupling linear perturbation and modal analysis is applied to simulate the dynamic behavior of the arch over consecutive scenarios, taking into account the influence of the damage on the structure’s dynamic properties in an automatic way. …”
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1900
Microstructure and magnetic properties of layered Fe soft magnetic composites with magnetic insulating layer
Published 2025-03-01“…The impacts of NiZnFe2O4 content on the structure and electromagnetic properties of the Fe SMCs were investigated. …”
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