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相关概念视频

Temperature Measurement Sites01:14

Temperature Measurement Sites

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A thermometer measures body temperature. The common sites for measuring body temperature are the oral cavity, axillary region, temporal artery, and skin surface, such as the forehead, abdomen, and axilla. True core body temperature is assessed in the rectum, tympanic membrane, pulmonary artery, esophagus, and urinary bladder.
Oral: When assessing oral temperature, the thermometer tip should be placed under the tongue in the posterior sublingual pocket. It offers accurate readings and can be...
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Differential Leveling01:12

Differential Leveling

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Differential leveling is a precise method in surveying used to determine the elevation difference between two points. Its primary goal is to establish accurate vertical measurements to create level surfaces or grade lines critical for designing and constructing infrastructures such as roads, bridges, and buildings.The procedure for differential leveling begins with setting up and leveling the instrument at a point where the benchmark can be seen. The level rod is held on the benchmark (BM), and...
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Linear Approximation in Time Domain01:21

Linear Approximation in Time Domain

343
Nonlinear systems often require sophisticated approaches for accurate modeling and analysis, with state-space representation being particularly effective. This method is especially useful for systems where variables and parameters vary with time or operating conditions, such as in a simple pendulum or a translational mechanical system with nonlinear springs.
For a simple pendulum with a mass evenly distributed along its length and the center of mass located at half the pendulum's length,...
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Heating and Cooling Curves02:44

Heating and Cooling Curves

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When a substance—isolated from its environment—is subjected to heat changes, corresponding changes in temperature and phase of the substance is observed; this is graphically represented by heating and cooling curves.
For instance, the addition of heat raises the temperature of a solid; the amount of heat absorbed depends on the heat capacity of the solid (q = mcsolidΔT). According to thermochemistry, the relation between the amount of heat absorbed or released by a substance, q, and its...
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One-Compartment Open Model: Wagner-Nelson and Loo Riegelman Method for ka Estimation01:24

One-Compartment Open Model: Wagner-Nelson and Loo Riegelman Method for ka Estimation

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This lesson introduces two critical methods in pharmacokinetics, the Wagner-Nelson and Loo-Riegelman methods, used for estimating the absorption rate constant (ka) for drugs administered via non-intravenous routes. The Wagner-Nelson method relates ka to the plasma concentration derived from the slope of a semilog percent unabsorbed time plot. However, it is limited to drugs with one-compartment kinetics and can be impacted by factors like gastrointestinal motility or enzymatic degradation.
On...
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Multi-input and Multi-variable systems01:22

Multi-input and Multi-variable systems

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Cruise control systems in cars are designed as multi-input systems to maintain a driver's desired speed while compensating for external disturbances such as changes in terrain. The block diagram for a cruise control system typically includes two main inputs: the desired speed set by the driver and any external disturbances, such as the incline of the road. By adjusting the engine throttle, the system maintains the vehicle's speed as close to the desired value as possible.
In the absence of...
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相关实验视频

Updated: Jan 15, 2026

Method for Simultaneous fMRI/EEG Data Collection during a Focused Attention Suggestion for Differential Thermal Sensation
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Method for Simultaneous fMRI/EEG Data Collection during a Focused Attention Suggestion for Differential Thermal Sensation

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复合GW基线启用了基于奇数值分解和ADALINE网络的大范围温度补偿方法.

Yuanqiang Ren1, Zhizhong Zhang1, Shenfang Yuan1

  • 1Research Center of Structural Health Monitoring and Prognosis, State Key Laboratory of Mechanics and Control for Aerospace Structures, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, PR China.

Ultrasonics
|October 9, 2025
PubMed
概括

这项研究引入了一种新的方法,使用单值分解 (SVD) 和自适应波线性神经网络 (ADALINE) 来补偿引导波 (GW) 结构健康监测 (SHM) 信号的温度变化. 该技术精确地纠正60°C范围内的GW信号,提高了SHM的可靠性.

关键词:
在ADALINE网络上,您可以导向波浪的导向波浪是一种指导波浪.单一值分解的分解方法结构性健康监测 结构性健康监测温度补偿是一种温度补偿.

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Gain-compensation Methodology for a Sinusoidal Scan of a Galvanometer Mirror in Proportional-Integral-Differential Control Using Pre-emphasis Techniques
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Gain-compensation Methodology for a Sinusoidal Scan of a Galvanometer Mirror in Proportional-Integral-Differential Control Using Pre-emphasis Techniques

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Near-Infrared Temperature Measurement Technique for Water Surrounding an Induction-heated Small Magnetic Sphere
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相关实验视频

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Method for Simultaneous fMRI/EEG Data Collection during a Focused Attention Suggestion for Differential Thermal Sensation
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科学领域:

  • 工程 工程师 工程师 工程师
  • 材料科学 材料科学 材料科学
  • 信号处理 信号处理

背景情况:

  • 基于引导波 (GW) 的结构健康监测 (SHM) 在航空航天领域至关重要,但受到温度变化等环境因素的阻碍.
  • 温度波动对GW信号产生重大影响,降低了SHM的准确性和可靠性,限制了实际应用.
  • 现有的方法很难有效地弥补温度引起的信号扭曲.

研究的目的:

  • 提出一种新的数据驱动方法,以补偿SHM的GW信号上的温度变化效应.
  • 消除传统的ADALINE信号补偿方法中对线性相关性的依赖.
  • 在不同的环境条件下提高SHM技术的准确性和可靠性.

主要方法:

  • 一种混合方法,结合单数值分解 (SVD) 和自适应波器线性神经网络 (ADALINE).
  • 从基线信号中提取单一向量矩阵来训练ADALINE网络,绕过线性相关性.
  • 使用重量矩阵和选择的存储基线信号生成一个复合基线集,用于温度补偿.

主要成果:

  • 在复合皮肤结构 (-10°C至50°C) 上进行实验验证,证明了准确的温度补偿.
  • 该方法成功地在60°C的温度间隔内产生了补偿信号,使用基线为-10°C.
  • 补偿信号的振幅和相位的最大误差分别低于-38 dB和-50 dB.

结论:

  • 拟议的SVD-ADALINE方法有效地弥补了SHM的GW信号中的温度变化.
  • 这种数据驱动的方法提高了SHM在广泛的温度范围内的可靠性和准确性.
  • 该方法显示了在环境变化下需要强大的结构监测的现实应用的巨大潜力.