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Distributed congestion control strategy using network utility maximization theory in VANET
Published 2019-02-01“…Cooperative vehicle safety system (CVSS) rely on periodical beacons to track neighboring vehicles.High traffic density often causes channel congestion,seriously damaging the performance of CVSS.Existing congestion control strategies aim to ensure the performance in network layer,without considering the service requirements of vehicles in different driving contexts.To solve the problem,a distributed congestion control strategy using network utility maximization (NUM) theory was proposed.First of all,the NUM model for channel resource allocation was introduced.A utility function reflecting vehicle’s safety requirements was proposed in the model.Then under the condition of fixed transmit powers,a optimization problem of channel resource allocation was proposed.Lastly,to solve the optimization problem,a distributed congestion control algorithm named utility-based rate congestion control (UBRCC) algorithm was designed,the algorithm worked out the optimal beaconing rate by updating vehicle’s congestion price,realizing the resource allocation according to vehicle’s safety requirements.Simulation results validate that UBRCC algorithm can efficiently control channel congestion,reduce transmission delay,ensure reliable data transmission and satisfies the requirements of safety applications.…”
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42
Pelagic fish camouflage in shallow waters from the humboldt current system through intracellular structures and reflectance mechanisms
Published 2025-08-01“…We measured the reflectance of individual fish using hyperspectral imaging and characterized the guanine crystal/cytoplasm layers within the skin of each fish using high-resolution scanning electron microscopy. …”
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43
Combining Physical and Network Data for Attack Detection in Water Distribution Networks
Published 2024-09-01“…Machine learning detection algorithms, which are showing encouraging results in cybersecurity applications, are leveraging the increasing number of datasets published in the water distribution community for better attack detection. These datasets also begin to reflect this novel cyber-physical aspect in two ways, first by conducting cyberattacks against the testbed infrastructures during data acquisition, and secondly by including network traffic data along with the physical data captured during the experimentations. …”
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44
Going Deeper With Deep Learning: Automatically Tracing Internal Reflection Horizons in Ice Sheets—Methodology and Benchmark Data Set
Published 2025-06-01“…We use a combination of manually fully‐traced radargrams, results of image processing and thresholding method, and layer slope inference for training U‐Net architectures. …”
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45
Distribution Characteristics of Machining Error in Turning Large Pitch External Thread
Published 2019-04-01“…When we turn large pitch external threads with axial layered cutting method, the formation process of thread surface is unstable due to the influence of spindle rotation error, tool wear and vibration, and the distribution of processing errors along the axis is diverse. …”
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46
Optical multi-wavelength selectors based on distributed feedback chirped grating in arrays of graphene
Published 2025-08-01“…Abstract We utilized the forward transmission matrix method (FTMM) to theoretically examine the transmission and reflection characteristics of distributed feedback chirped grating structures based on graphene arrays. …”
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SOURCES OF QUATERNARY POTASSIC VOLCANIC ROCKS FROM WUDALIANCHI, CHINA: CONTROL BY TRANSTENSION AT THE LITHOSPHERE–ASTHENOSPHERE BOUNDARY LAYER
Published 2016-12-01“…Since 1.3 Ma, irregular spatial-temporal distribution of volcanic activity reflected dominated background processes. …”
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Creep failure characteristics and damage creep model of red layer soft rock based on Perzyna viscoplastic theory
Published 2025-04-01“…The results show that: (1) The model curves in this paper fit well with the test data, indicating that Weibull distribution function is feasible to describe rock creep damage, and the accuracy and rationality of the model in this paper are verified. (2) Based on Perzyna viscoplastic theory, a more accurate viscoplastic strain expression was established to describe accelerated creep. (3) By defining the critical point damage variables of different creep stages, the relationship between rock creep deformation and damage can be better reflected, which makes up the shortcoming that Nishihara model cannot describe accelerated creep, and enriches the creep constitutive theory of rock materials.…”
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49
Top soil layer equi-electrical conductivity and pollution with salts mapping for a region located within Baghdad city
Published 2011-06-01“…Laboratory (EC) test values measured by the use of solutions (EC) digital meter for the extract of the dissolved soils with a distilled de-ionized water using the ratio of (2:1) .The distributed (EC) values for the field representative soil samples used lately to plot a contour equi-electrical conductivity map and EC soil fluctuation profiles, in which reflected the top soil layer salinity distribution according to Tigris river position in the study area , also it reflects the increase and decrease of this layer salinity in a relation to the river position. …”
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An Evaluation Method for Distribution Network Operation Based on Multi-source Data Deep Fusion
Published 2024-06-01“…Based on the results, the distribution network operation evaluation index system is designed and a distribution network operation comprehensive evaluation model based on multi-layer weight constraints is constructed to obtain the distribution network comprehensive evaluation results. …”
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51
Study on spatial variability and profile distribution characteristics of soil salinity by Kriging with an electromagnetic induction
Published 2007-03-01“…Electromagnetic induction EM38 was applied to study the spatial variability of soil salinity at soil layers of 0-40 cm and 0-80 cm with the help of GIS and geostatistics, which was performed in characteristic field of the Yellow River Delta, and salinization classification and salinity profile distribution characteristics were further analysed. …”
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Evaluation of MODIS and VIIRS BRDF Parameter Differences and Their Impacts on the Derived Indices
Published 2025-05-01“…In addition, both MODIS and VIIRS have a large proportion of zero-valued pixels (volumetric and geometric-optical parameter layers), whereas the spatiotemporal distribution of zero-valued pixels in VIIRS is more widespread. …”
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Moisture Localization and Diagnosis Method for Power Distribution Cables Based on Dynamic Frequency Domain Reflectometry
Published 2025-05-01“…Simulations and experiments confirm that moisture ingress in cable bodies increases the distributed capacitance, generating reflection peaks at corresponding distances on frequency domain localization plots. …”
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54
The Effect of the Marine Environment on the Distribution of <i>Sthenoteuthis oualaniensis</i> in the East Equatorial Indian Ocean
Published 2025-04-01“…<i>Sthenoteuthis oualaniensis</i> is one of the most commercially important marine cephalopod species distributed throughout tropical and subtropical waters of the Indo-Pacific Seas. …”
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Switchable Polarization Selective Terahertz Wavefront Manipulation in a Graphene Metasurface
Published 2019-01-01“…The proposed metasurface consists of two layers of graphene arrays, polymer dielectric spacer and a gold mirror film, which can be switched between two states by simply biasing the two graphene layers <sc>on</sc> and <sc>off</sc> with the designed voltage and zero voltage without reconfiguring the Fermi energy distribution. …”
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56
Investigation into Bayesian inversion techniques for estimating mineral particle size distribution and abundance utilizing hyperspectral data
Published 2025-08-01“…In this study, we propose a new method based on the inversion of a two-layer Bayesian framework, which models the particle size parameters as continuous random variables and sets the particle size distribution parameters as hyperparameters, and takes into account the influence of the variability of the particle size features on the interpretation of mineral abundance. …”
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Research on Physical Layer Security Performance of Hybrid RF/FSO System Based on RIS Assistance under FSO Eavesdropping Environment
Published 2024-01-01“…This paper proposes ahybrid RF/FSO system based on RIS reflection to interfere with eavesdroppers in FSO eavesdropping scenarios, and analyzes and optimizes the physical layer security performance of this communication system. …”
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Distribution of cold and temperate ice in glaciers on the Nordenskiold Land, Spitsbergen, from ground-based radio-echo sounding
Published 2019-06-01“…For interpretation of radar reflections from CTS we used the noticeable distinction in character of the radar reflections from the upper and lower thicknesses of glacier: absence of internal reflections (excluding reflections from buried crevasses and glacier wells) from upper cold ice layer and a great number of reflections of hyperbolic form from the lower layer related to strong scattering of radio waves by water inclusions in the temperate ice. …”
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Heterogeneity of NeuN Protein Distribution as a Marker of Morphological Personalization of Cerebral Cortex Neurons: an Experimental Study
Published 2025-02-01“…To identify personalized morphological neuronal phenotypes based on the distribution pattern of the neuronal protein NeuN in the cerebral cortex layers.Materials and Methods. …”
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