An initial exploratory clinical study and outcome assessment of gastrointestinal surgeries using advanced robotic-assisted techniques.

Background: In addition to the Da Vinci surgical robot, domestic surgical robots are being developed rapidly. Chinese Toumai® laparoscopic surgical robot was approved for urological surgery in 2022.This study aims to systematically evaluate the safety and efficacy of the Toumai® robotic surgical system in performing complex gastrointestinal surgeries.

Significance of carbonyl compounds to photochemical ozone formation in a coastal city (Shantou) in eastern China.

Carbonyl compounds are ubiquitous in the troposphere, yet their contributions to ambient ozone (O) formation have rarely been quantified in China. To better understand their roles in O pollution, a field campaign was conducted at an urban site of Shantou, a coastal city in eastern China, during 7th-29th October 2019. Seven carbonyls were quantified (average ± standard deviation: 14.

Distributed fiber sparse-wideband vibration sensing by sub-Nyquist additive random sampling.

The round-trip time of the light pulse limits the maximum detectable vibration frequency response range of phase-sensitive optical time domain reflectometry (ϕ-OTDR). Unlike the uniform laser pulse interval in conventional ϕ-OTDR, we randomly modulate the pulse interval so that an equivalent sub-Nyquist additive random sampling (sNARS) is realized for every sensing point of the long interrogation fiber. For a ϕ-OTDR system with 10 km sensing length, the sNARS method is optimized by theoretical analysis and Monte Carlo simulation, and the experimental results verify that a wideband sparse signal can be identified and reconstructed.