相关实验视频
Updated: Jan 17, 2026

09:41
Blast Quantification Using Hopkinson Pressure Bars
Published on: July 5, 2016
9.4K
爆炸波到达时间的三边化:用于确定爆炸产量和位置的反向方法
Jay Karlsen1, Dain G Farrimond1,2, Tommy J Lodge1,2
1School of Mechanical, Aerospace and Civil Engineering, The University of Sheffield, Sheffield, UK.
概括
这项研究引入了一种快速三边化方法,使用爆炸波到达时间来快速确定爆炸产量和位置. 这种方法可以准确地预测爆炸参数,即使有噪音数据,有助于应对灾害.
科学领域:
- 应用的反向问题
- 分析爆炸情况.
- 地质物理学 地质物理学
背景情况:
- 准确确定爆炸产量和位置对于灾难响应和法医分析至关重要.
- 传统方法可能耗时,需要广泛的传感器网络.
- 测量不确定性和数据变化在现实爆炸场景中构成重大挑战.
研究的目的:
- 开发一种快速的反向方法来确定爆炸产量和位置.
- 为了减轻测量不确定性的影响,使用概率框架.
- 用实验室和现实世界的爆炸数据来验证拟议的方法.
主要方法:
- 快速反向方法的开发,基于经验性的爆炸波到达时间规律的三边化.
- 对测量不确定性的严格灵敏度分析.
- 使用蒙特卡洛抽样实施一个概率框架.
- 应用到实验室实验和贝鲁特爆炸事件的社交媒体录像.
主要成果:
- 在实验室设置中,预测电荷质量在真实产量的6.3%以内,位置在3.65电荷半径以内.
- 贝鲁特爆炸的预测产量为0.52 kt,与文献一致.
- 电荷位置准确地预测到贝鲁特爆炸的火山口半径内.
- 证明了可靠性和速度 (次秒计算),即使有显著的传感器噪声.
结论:
- 拟议的三边化方法为确定爆炸产量和位置提供了快速可靠的解决方案.
- 概率框架有效地处理数据的变化和不确定性.
- 该方法具有显著的潜力,可以改善爆炸后立即的损害评估和灾难应对计划.
相关概念视频
Mass Analyzers: Common Types
1.4K
The quadrupole mass analyzer consists of four cylindrical metal rods arranged in a diamond carrying a DC voltage and a radio-frequency AC voltage. The motion of ions through the quadrupole depends on the field strength, causing only ions of a certain m/z to resonate successfully and strike the detector at a given field strength. Though the transmission rate for these analyzers is high, the exact elemental composition of the sample is not determined because of low resolution; however, they are...
1.4K
Atomic Emission Spectroscopy: Lab
568
AES is a powerful analytical technique, especially effective when used with plasma sources, producing abundant spectra in characteristic emission lines. The Inductively Coupled Plasma (ICP), in particular, yields superior quantitative analytical data due to its high stability, low noise, low background, and minimal interferences under optimal experimental conditions. However, newer air-operated microwave sources are emerging as promising alternatives that could be more cost-effective than...
568
Impact: Problem Solving
440
In an experiment conducted during a Mars mission, a rover propels a projectile with an initial velocity, and the projectile rebounds after colliding with the Martian surface. To ascertain the maximum height attained by the projectile after this collision, the known restitution coefficient and acceleration due to gravity are employed.
By designating the launch point as the origin and utilizing kinematic equations, the vertical component of the projectile's velocity at the point of impact is...
By designating the launch point as the origin and utilizing kinematic equations, the vertical component of the projectile's velocity at the point of impact is...
440
Electronic Distance Measuring Instruments
462
Electronic Distance Measuring Instruments (EDMs) are essential tools in modern surveying, offering precise distance measurements by emitting electromagnetic signals and calculating the time required for these signals to travel to a target and return. Two primary types of signals are used in EDMs — light waves and microwaves — each suited to specific environmental and distance requirements. Light-wave-based EDMs utilize either infrared or laser light, providing high accuracy over...
462
Projectile Motion: Equations
14.1K
Projectile motion is commonly observed in our day-to-day life. For example, a basketball thrown by a player, an arrow shot from a bow, and kids jumping into the pool, all undergo projectile motion.
Any projectile motion problem can be solved by using the following strategy:
Any projectile motion problem can be solved by using the following strategy:
14.1K
Atomic Emission Spectroscopy: Instrumentation
1.2K
The instrumentation of atomic emission spectrometry (AES) involves various components, including atomization devices that convert samples into gas-phase atoms and ions. There are two main types of atomization devices: continuous and discrete atomizers. Continuous atomizers, like plasmas and flames, introduce samples in a constant stream, while discrete atomizers inject individual samples using syringes or autosamplers. The most common discrete atomizer is the electrothermal atomizer.
1.2K

