Abstract This paper primarily explores the modeling method of n-level complex helical structures with coal mining machine cables as the research object.The paper first elaborately introduces the modeling method of n-level helix curves based on parametric equations and coordinate transformations, and compensates Pie for the n-level helix curves with
Abstract Integrated, timely data about pavement structures, materials and performance information are crucial for the continuous improvement and optimization of pavement design Laundry Basket by the engineering research community.However, at present, pavement structures, materials and performance information in China are relatively isolated and can
Catalytic gas sensors are widely used for measuring concentrations of combustible gases to prevent explosive accidents in industrial and domestic environments.The typical structure of the sensitive element of the sensor consists of copyright and catalyst materials, which are in and around a platinum coil.However, the size of the platinum coil is CH
Complex natural disasters often cause people to suffer hardships, and they can cause a large number of casualties.A population that has been affected by a natural disaster is at high risk and desperately in need of help.Even with the timely assessment and knowledge of the degree that natural disasters affect populations, challenges arise during eme