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Statistical and synoptic analysis of cold waves in North West of Iran
Published 2016-03-01“…Out of occured cold wave in North West of the coldest identified wave pertaingt each class for synoptic analyzes were selected. This study suggests that the prevailing pressure pattern during the relevant wave indicates high pressure over the earth surface as well as deep trough in upper layer. …”
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64
Mesoscale Numerical Simulation and Cloud Microphysical Characteristics of the Warm Zone Blizzard in Northern Xinjiang
Published 2024-02-01“…The warm zone blizzard are both infrequent and highly destructive, making their accurate prediction a challenging and crucial focus.This study utilized four distinct cloud microphysics schemes (Lin, Thompson, WDM6, and WSM6) within the WRF mesoscale model to conduct a numerical simulation of a typical warm zone blizzard process in the northern Xinjiang in the middle of November 2016.The research objectives encompassed the evaluation of the model's capacity to simulate the warm zone blizzard, the selection of an optimal parameterization scheme, an analysis of the vertical distribution and evolution of hydrometeors during the snowstorm, and an exploration of the developmental patterns of related mesoscale systems contributing to the snowstorm.The analysis yielded the following key findings: (1) Among the diverse cloud microphysics parameterization schemes tested, the Lin scheme demonstrated the most favorable performance, effectively simulating snowfall magnitudes, spatial distributions, and trends.(2) In the cloud, all kinds of water condensate particles are active in the lower and middle troposphere, with graupel and snow being the most.Ice crystals, snow, cloud water and graupel particles are distributed from the upper layer to the lower layer.Near the windward slope of Altai Mountain is the center of the large concentration of each water condensate particle.The vertical alignment of the high value center of the four kinds of cloud water condensate particles in the strong snowfall area is conducive to the transformation of each particle.(3) High-humidity systems upstream moved westward, with the intensification of low-level southward jet streams resulting in pronounced moisture convergence.The western foothills of the Altai Mountains acted as a barrier, promoting moisture convergence by blocking the windward side; The low-level southerly jet also provides a continuous updraft and unstable condition for the generation of the blizzard.Strong snowfall is located in a wide updraft area between two groups of secondary circulations.The explosive growth of vertical movement is conducive to triggering the release of unstable energy, providing strong dynamic lifting conditions for the development and maintenance of the blizzard.…”
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Modeling and Simulation of a Resonant-Cavity-Enhanced InGaAs/GaAs Quantum Dot Photodetector
Published 2015-01-01“…Comparing with the conventional photodetectors, the resonant-cavity-enhanced photodiode (RCE-PD) showed higher detection efficiency, faster response speed, and better wavelength selectivity and spatial orientation selectivity. Our simulation results also showed that when an AlAs layer is inserted into the device structure as a blocking layer, ultralow dark current can be achieved, with dark current densities 0.0034 A/cm at 0 V and 0.026 A/cm at a reverse bias of 2 V. …”
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66
An Atmospheric Bore in North China Plain and Its Impact on Nocturnal Convection
Published 2025-03-01“…The depth ration between near-surface light fluid and density current and Froude number of the selected profiles indicate that convection-generated density current intrudes into the nocturnal stable boundary layer, causing a complete blocking flow regime that triggers a type C bore ahead of the convective system. …”
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Water-Salt Migration and Deformation Characteristics of Saline Soil under Different Replenishment Conditions
Published 2025-08-01“…In engineering practice, when silty sand—a soil type prone to settlement deformation—is used as an overlying replacement layer to suppress salt-induced frost heave deformation of sulfate saline soil, attention should be paid to particle gradation and compaction of replacement soil, and the implementation of salt-blocking and drainage measures. …”
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Exercise-induced Nogo-A influences rodent motor learning in a time-dependent manner.
Published 2021-01-01“…Following one week of exercise, rats exhibited a decrease in Nogo-A levels, selectively in motor cortex layer 2/3, but not in layer 5. …”
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69
Principal Component Analysis-Multilinear Perceptron-based model for Distributed Denial of Service Attack Mitigation
Published 2025-05-01“…The firewall, utilizing IPtables, selectively permits traffic from trusted sources, successfully blocking nearly 70% of DDoS threats. …”
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Designing and implementing a Web-based real time routing service for crisis management (a case study for district 11 of Tehran)
Published 2019-06-01“…Open source languages, format, libraries and software such as HTML, CSS, AJAX, GeoJSON, PHP, OpenLayer, PostGIS were also used to design the service and applying online weightings, blocking each piece of routes and re-routing procedure without blocked traffics, implementation of server-side processing and reducing the volume of the client-side’s operations, being under the browser’s surveillance, no need to install any software and the ability to use it on any operating system can be named. …”
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A Printed Gate Controlled Electrochemical Capacitor‐Diode (G‐CAPode) for AC Filtering Applications
Published 2025-06-01“…The heart of the device consists of a recently developed asymmetric electrical double‐layer capacitor system based on selective, size‐dependent ion adsorption. …”
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Heat treatment control technology of high-strength steel gears based on support vector machine
Published 2025-03-01“…Abstract In the actual production process of gears often because of the selection of heat treatment parameters is unreasonable and can not accurately achieve the small deformation, high precision, less grinding machining allowance heat treatment sample requirements, there are uneven distribution of carburized layer, surface hardness, hardness of the heart can not meet the requirements of the indicators. …”
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Heuristic Optimization-Assisted Dilated Convolution Neural Network With Gated Recurrent Unit for Channel Estimation in NOMA-OFDM System
Published 2024-01-01“…NOMA enables numerous users to share identical blocks of resources with varying power distribution factors. …”
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Construction of a ‘Simple, Fast and Accurate’ Evaluation Method for Profile Control and Plugging Effect of Gel Plugging Agent Based on Simulations
Published 2025-02-01“…A new experimental system with a comprehensive evaluation index (<i>Γ</i>) of 8.97 Pa<sup>2</sup> was selected. After the profile control of the system, the effluent ratio of the high and low permeability layers reached 1:9, and its erosion resistance was greater than 20 PV. …”
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A Small Target Pedestrian Detection Model Based on Autonomous Driving
Published 2023-01-01“…To improve the accuracy of small-target pedestrian detection and the anti-interference ability of the model, a small-target pedestrian detection model that fuses residual networks and feature pyramids is proposed. First, a residual block with a discard layer is constructed to replace the standard residual block in the residual network structure to reduce the complexity of the model computation process and solve the problems of gradient disappearance and explosion in the deep network. …”
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The Stabilization Mechanism of a Stable Landslide Dam on the Eastern Margin of the Tibetan Plateau, China: Insights from Field Investigation and Numerical Simulation
Published 2025-08-01“…Field investigation shows that the Conaxue Co landslide dam was formed by a high-speed long-runout landslide blocking the river, with its structure exhibiting a typical inverse grading pattern characterized by coarse-grained rock overlying fine-grained layers. …”
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Methods for Designing Technologies of Organic Crop Production
Published 2025-03-01“…This selection is guided by an integrated eco- economic criterion; formulated as the sum of three components: total financial costs per unit of work; economic losses due to nutrient depletion in the arable layer; and economic losses resulting from soil compaction during technological operations. …”
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Multimode hybrid gold-silicon nanoantennas for tailored nanoscale optical confinement
Published 2023-05-01“…Here, we investigate hybrid metal-semiconductor nanoantennas, consisting of a multimode silicon nanopillar core coated with a gold layer, that offer an enhanced degree of control over the mode selection and confinement, and emission of light on the nanoscale exploiting high-order electric and magnetic resonances. …”
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A comprehensive evaluation of deep learning approaches for ground-level ozone prediction across different regions
Published 2025-05-01“…Additionally, we observe that DL models with more than two hidden layers frequently suffer from overfitting. Particularly for the Bi-LSTM architecture, as the number of hidden layers increases from 1 to 7, we observe a 12% reduction in R2 performance. …”
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Efficient differentiation of embryonic stem cells into mesodermal precursors by BMP, retinoic acid and Notch signalling.
Published 2012-01-01“…ES cells were plated on a feeder layer of PA6 cells, which have membrane-associated stromal-derived inducing activity (SDIA), the molecular basis of which is currently unknown. …”
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