X. Han
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View article: Torsional Stick–Slip Modeling and Mitigation in Horizontal Wells Considering Non-Newtonian Drilling Fluid Damping and BHA Configuration
Torsional Stick–Slip Modeling and Mitigation in Horizontal Wells Considering Non-Newtonian Drilling Fluid Damping and BHA Configuration Open
Stick–slip vibration leads to accelerated wear of drilling tools and downhole tool failures, particularly in long horizontal sections. Existing drill-string dynamics models and control or digital-twin frameworks have significantly improved…
View article: Comparative study on PID for DC motor speed regulation
Comparative study on PID for DC motor speed regulation Open
Because of its straightforward design and excellent adjustment efficiency, PID (proportional-integral-derivative) controllers are frequently employed in motor speed control. This study reviews the use of PID control technology in DC motor …
View article: Sliding Mode Controller for Positioning of an Underwater Vehicle Subject to Disturbances and Time Delays
Sliding Mode Controller for Positioning of an Underwater Vehicle Subject to Disturbances and Time Delays Open
Unmanned underwater vehicles are crucial for deep-sea exploration and inspection without imposing any danger to human life due to extreme environmental conditions. But, designing a robust controller that can cope with model uncertainties, …
View article: Time delay control with sliding mode observer for a class of nonlinear systems: Performance and stability
Time delay control with sliding mode observer for a class of nonlinear systems: Performance and stability Open
Time delay control (TDC) is a type of disturbance observer (DO)‐based control, where the disturbance estimation is performed by using the past information of control input and measurement signals. Despite its capability, there are concerns…
View article: Hybridisation and splitting of a crank angle resolved internal combustion engine model using a mean value intake for real-time performance
Hybridisation and splitting of a crank angle resolved internal combustion engine model using a mean value intake for real-time performance Open
This paper describes splitting a crank angle resolved three cylinder combustion engine with an air path model and a combustion model.This is to distribute the computational effort on hardware by running models on separate cores to achieve …
View article: Effects of CD3McAb and rhIL-2 activated bone marrow on the killing and purging of leukemia cells
Effects of CD3McAb and rhIL-2 activated bone marrow on the killing and purging of leukemia cells Open
We investigated the roles of CD3McAb and rhIL-2 activated bone marrow in the killing and purging of leukemia cells. Cytotoxicity of activated bone marrow was detected with MTT assay. CFU-GM level in activated bone marrow and the destructio…