Development of Laser Processing Carbon-Fiber-Reinforced Plastic.

Due to its exceptional advantages, such as high specific strength, high specific modulus, and good fatigue resistance, carbon-fiber-reinforced plastic (CFRP) is frequently utilized in aerospace, aviation, automotive, rail transportation, and other areas. Composite components typically need to be joined and integrated. In the equipment manufacturing industry, the most used methods for processing composite components are cutting, drilling, and surface treatment.

Experimental study of different pulse delays on the phenomenon of double shock waves induced by a millisecond-nanosecond combined-pulse laser.

We study the motion morphology, distance, and velocity of plasma and laser-induced shock waves induced by a millisecond-nanosecond (ms-ns) combined-pulse laser with different pulse delays on silicon. The laser shadowgraph method is used, and the phenomenon of double laser-induced shock waves has been found while the pulse delay is 1.2-1.

Experimental study of the morphological evolution of the millisecond-nanosecond combined-pulse laser ablation of aluminum alloy.

A comparative study of the interactions of the millisecond-nanosecond combined-pulse laser and millisecond pulse laser with aluminum alloy is presented. During the interaction between the laser and aluminum alloy, the coupling effect of the nanosecond pulse laser on the molten pool formed by the millisecond laser is analyzed. During the nanosecond laser irradiation in the combined approach, the expansion velocity of the plasma plume reaches 600 m/s, while the laser ablation depth increased by approximately 9 times.

The Effect of Spot Size Combination Mode on Ablation Morphology of Aluminum Alloy by Millisecond-Nanosecond Combined-Pulse Laser.

Ablation morphology affects the quality of laser processing. Therefore, the control of ablation morphology is very important. The influence of spot size combination mode on the ablation morphology of aluminum alloy is studied for the first time.

Long-term outcomes of endoscopic multiband mucosectomy for early esophageal squamous cell neoplasia: a retrospective, single-center study.

Background And Aims: Endoscopic multiband mucosectomy (EMBM) has been used to treat early Barrett's esophagus and esophagogastric junction neoplasia, yet it is seldom reported for the treatment of early esophageal squamous cell neoplasia. Here we retrospectively evaluated the feasibility, safety, and efficacy of EMBM for early esophageal squamous cell neoplasia.

Methods: A total of 125 patients were included in the study.

Faecal calprotectin concentrations in gastrointestinal diseases.

Objective: To quantify faecal calprotectin concentrations in a variety of gastrointestinal disorders in order to determine its diagnostic value.

Methods: Patients with gastrointestinal symptoms undergoing upper or lower endoscopy and healthy control subjects provided stool samples. Calprotectin was quantified by enzyme-linked immunosorbent assay.