Application of reinforcement learning for NQR excitation sequence optimization

Monea, Cristian

doi:10.1109/ecai52376.2021.9515068

Cited by 1 publication

(1 citation statement)

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“…external magnetic field, unlike the case with other magnetic resonance techniques 10 . However, NQR also has several drawbacks that researchers focus on addressing, such as relatively low sensitivity 11 and strong dependence of the measured signal on excitation sequence parameters (such as power level, pulse width, and pulse repetition rate) 12 . Even with these drawbacks, NQR is by far the most economical effective technique, as seen in Table 1.…”

Section: Literature Review and Backgroundmentioning

confidence: 99%

Non-invasive authentication of mail packages using nuclear quadrupole resonance spectroscopy

Horace-Herron

Masna

Dehghanzadeh

et al. 2023

Sci Rep

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The international postal network is one of the most widely used methods for correspondence throughout the world. Most postal traffic across the globe consists of legitimate interpersonal, business-consumer, and business-business communications. However, the global postal system is also utilized for criminal activity. In particular, it is often utilized to ship and distribute contraband, including illegal psychoactive drugs such as fentanyl and heroin, to consumers. Existing technological solutions are capable of identifying synthetic opioids and other illegal drugs within packages, but are accompanied by several disadvantages that make them unsuitable for large-scale authentication of international mail traffic. This paper presents a novel method for non-invasive authentication of mail packages that overcomes these challenges. The approach uses nuclear quadrupole resonance (NQR) spectroscopy to detect and quantify the presence of known active pharmaceutical ingredients (APIs) within the package. It has been experimentally demonstrated using a bench top prototype. Test results from a variety of package types demonstrate the effectiveness of the proposed authentication approach.

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Section: Literature Review and Backgroundmentioning

confidence: 99%