Abstract Robotic splicing of steel arches is a challenging task that necessary to realize the grasping and docking in limited space. Steel often have mass more than 200 kg length 4 m. Owing large volume high requirements for accurately positioning splicing, it difficult general manipulator meet stiffness requirements. To enhance structural arch manipulator, single-degree-of-freedom (DOF) closed...

Bioerosion by boring sponges is an important mechanism shaping the structure of coral reefs all around the world. To determine the excavation rate by boring sponges, we developed a system in which chemical and mechanical boring rates [calcium carbonate (CaCO(3)) dissolution and chip production, respectively] were measured simultaneously in experimental tanks containing reefal rock inhabited by ...

Computational thinking has been identified as an essential 21st century skill. Unfortunately, many computer users, particularly children, consider programming to be hard and boring. There are two fundamental barriers to making programming more appealing: cognitive challenges to overcoming the hard part, and affective challenges to overcoming the boring part. AgentCubes is a new 3D creativity to...

Purpose. One of the most common problems in mechanized excavation is cutting tool wear, which has a great impact on final cost project and its duration. Also, one important factors affecting wear tools operating parameters tunnel boring machine (TBM). Within framework this research, laboratory simulator was designed constructed to investigate process laboratory. Methods. A few features device a...

In tunnel boring machine (TBM) construction, the advance rate is a crucial parameter that affects TBM driving efficiency, project schedule, and construction cost. During operation process, various types of indicators are monitored in real-time can help to control TBM. Although some studies have already been carried out prediction, research almost all based on statistical methods shallow learnin...