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321
Evaluation of Nitrogen Fertilizer Supply and Soil Nitrate Thresholds for High Yields of Foxtail Millet
Published 2024-09-01“…A relationship between soil nitrate and nitrogen application rate was established: y = 867.5 − 50z (where y represents the optimal nitrogen application rate for high yield (kg·ha<sup>−1</sup>), and z represents soil NO<sub>3</sub><sup>−</sup>-N content in the 0–20 cm layer before sowing, ranging from 10.0 to 17.35 mg·kg<sup>−1</sup>), which provided a practical method for nitrogen fertilization to achieve high yield of foxtail millet. …”
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322
Study on Time Domain Early Warning Method for Vibration Monitoring of Dynamic Imbalance of Train Cardan Shaft
Published 2019-03-01“…This paper studied the time domain early warning method of dynamic unbalance of cardan shaft by monitoring the abnormal vibration of gearbox, explored the time domain early warning parameters according to the long-term track test, established the time domain early warning model of vibration of cardan shaft-gear box end;established the finite element model of transmission system by using finite element method, and studied the vibration response relationship of cardan shaft with different dynamic unbalance values at different rotational speeds at the gear box end. …”
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323
A Robust Multi‐Objective Pressure Sensor Placement Method for Burst Detection in Water Distribution Systems
Published 2024-08-01“…Within this method, a new threshold metric is introduced to quantify the minimum detectable burst outflow across all pipes. …”
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324
Study on On-line Detection Method of Heavy Duty Truck Gearbox Assembly Quality based on Wavelet Analysis
Published 2021-03-01“…In order to determine the assembly quality of a certain type of gearbox, the common assembly faults of gearbox are briefly introduced based on the internal structure of gearbox, the characteristics frequencies of common faults of each gear and bearing in each gear position of gearbox are theoretically analyzed, an acoustic signal acquisition experimental platform is built and used to collect the acoustic signals of targeted gearbox in different gears. The collected signals are further processed through using the wavelet threshold de-noising method and then decomposed by using the wavelet analysis. …”
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325
Fracture Threshold Analysis and Parameter Matching of Cut-Out Induced Bolts for Subway Couplers
Published 2025-05-01Get full text
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326
Effects of Rh-Negative Blood Group on Pure Tone Thresholds and Immittance Test Results
Published 2024-06-01“…Also, there was no significant difference for pure tone thresholds for the frequencies 250 Hz to 16 kHz and tympanometry findings. …”
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327
Methods for Extracting Fractional Vegetation Cover from Differentiated Scenarios Based on Unmanned Aerial Vehicle Imagery
Published 2024-11-01“…In this paper, based on 12 UAV visible light images in differentiated scenarios in the Ebinur Lake basin, Xinjiang, China, various methods are used for high-precision FVC estimation: Otsu’s thresholding method combined with 12 Visible Vegetation Indices (abbreviated as Otsu-VVIs) (excess green index, excess red index, excess red minus green index, normalized green–red difference index, normalized green–blue difference index, red–green ratio index, color index of vegetation extraction, visible-band-modified soil-adjusted vegetation index, excess green minus red index, modified green–red vegetation index, red–green–blue vegetation index, visible-band difference vegetation index), color space method (red, green, blue, hue, saturation, value, lightness, ‘a’ (Green–Red component), and ‘b’ (Blue–Yellow component)), linear mixing model (LMM), and two machine learning algorithms (a support vector machine and a neural network). …”
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328
Sensitivity to Instruction Strategies in Motor Learning Is Predicted by Anterior–Posterior TMS Motor Thresholds
Published 2025-06-01“…<b>Objectives:</b> This study used controllable pulse parameter TMS (cTMS) to assess how AP-sensitive interneuron excitability interacts with explicit knowledge to influence motor learning. <b>Methods</b>: Seventy-two participants were grouped as AP-positive (n = 36) and AP-negative groups (n = 36) based on whether an AP threshold could be obtained before reaching maximal stimulator output. …”
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329
Optimal spirometry thresholds for the prediction of chronic airflow obstruction: a multinational longitudinal study
Published 2025-03-01“…Methods The Burden of Obstructive Lung Disease study is a multinational cohort study. …”
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330
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331
Study on the Method of Real-Time Picking up the First Break of Seismic Phase in Museum Response Monitoring
Published 2025-03-01“…On the basis of characteristics of complex museum environment, low signal-to-noise ratio, non-stationary, and aperiodic signals, a real-time picking algorithm for automatic recognition of earthquake first break was proposed. [Methods] The vibration signals that may exist in the museum were compared with the seismic signals under different intensities, different sites, and other conditions, and the difference between them is used to pick up the first arrival of the earthquake in real time. …”
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332
Coordinated Headway-Based Control Method to Improve Public Transit Reliability considering Control Points Layout
Published 2020-01-01“…In the proposed control method, the threshold value for activating stop-skipping strategy is raised, avoiding provoking much additional waiting time because of boarding rejected. …”
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333
Intelligent Trust Evaluation Method for Underwater Sensor Networks Based on Fuzzy Clustering and Dynamic Weight Allocation
Published 2025-04-01“…However, most existing trust evaluation methods rely on the linear weighting of trust features and the decision-making method based on threshold comparison. …”
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334
Research on the Heavy Gas Setting Method of Oil-Immersed Transformer Based on Oil Flow Acceleration Characteristics
Published 2025-07-01“…To further enhance the sensitivity of gas relays for the heavy gas alarm, this paper takes the BF type double float gas relay as the research object and proposes a new method for heavy gas setting, which is based on the internal oil flow acceleration characteristics of the gas relay. …”
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335
Dynamic Monitoring of a Bridge from GNSS-RTK Sensor Using an Improved Hybrid Denoising Method
Published 2025-06-01“…The stability experiment demonstrated the superiority of the improved wavelet threshold denoising method in reducing the noise of the GNSS-RTK. …”
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336
An Improved Soil Moisture Downscaling Method Based on Soil Properties and Geographical Divisions over the Loess Plateau
Published 2025-02-01“…This study proposes an improved semi-physical SM downscaling method. The effects of environmental factors on SM in different geographical zones (Windy Sand Hills, Flood Plains, Loess Yuan, Hilly Loess, Earth-rock Hills and Rocky Mountain) were analyzed using Random Forests. …”
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337
Computational Analysis Method for Multi-subject Behavior in Public Spaces Based on Targeted Computer Vision Tracking
Published 2025-05-01“…Subsequently, computational analysis and visualization methods for revealing the interaction behaviors of different groups are explored, which involves a pedestrian identification threshold model based on human proportion characteristics that enables targeted identification and differentiation of children from adults, and a dedicated analysis module designed to visualize behavioral patterns of each identified crowd and thereby provide visual patterns for the spatial-temporal distributions of different crowds. …”
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338
Research on High-Speed Railway Subgrade Design Method Based on Energy Dissipation and Dynamic Stability Characteristics
Published 2025-01-01“…A criterion for determining the critical shakedown state of high-speed railway subgrade structures based on equivalent unit volume dissipated energy is proposed, and a method for determining the design threshold of dynamic stress and dynamic strain is also proposed. …”
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339
A Novel, Open Access Method to Assess Sleep Duration Using a Wrist-Worn Accelerometer.
Published 2015-01-01“…This estimate was lower for time in bed for women, depressed participants, those reporting more insomnia symptoms, and on weekend days. No such group differences were found for total sleep duration. Our algorithm was validated against data from a polysomnography study on 28 persons which found a longer time window and lower angle threshold to have better sensitivity to wakefulness, while the reverse was true for sensitivity to sleep. …”
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340
Double reputation and multi-angle weight-based cooperative spectrum sensing method against SSDF attacks
Published 2023-12-01“…In order to improve the ability of cooperative spectrum sensing to withstand spectrum sensing data falsification (SSDF) attacks, a double reputation and multi-angle weight-based cooperative spectrum sensing (DRMW-CSS) method was proposed.Firstly, a scoring reputation was obtained by multiple iterations of historical local decision results, and an accuracy reputation was calculated on this basis.Secondly, secondary users (SU) were screened by double reputation and multiple reputation thresholds.Then, the impact of SSDF attacks on the screening method was judged and divided into three situations.Finally, the final global decision was made using the corresponding multi-angle weight data fusion decision method according to different situations.Simulation results show that the proposed method has good sensing accuracy when facing SSDF attacks with different attack strategies and probabilities, and has better anti-attack capability compared to traditional methods.…”
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