Rujun Gao

• Doctor of Engineering
• Texas A&M University

Continual learning has become essential in many practical applications such as online news summaries and product classification. The primary challenge is known as catastrophic forgetting, a phenomenon where a model inadvertently discards previously learned knowledge when it is trained on new tasks. Existing solutions involve storing exemplars from...

This study explores the feasibility of using large language models (LLMs), specifically GPT-4o (ChatGPT), for automated grading of conceptual questions in an undergraduate Mechanical Engineering course. We compared the grading performance of GPT-4o with that of human teaching assistants (TAs) on ten quiz problems from the MEEN 361 course at Texas A...

Text-based open-ended questions in academic formative and summative assessments help students become deep learners and prepare them to understand concepts for a subsequent conceptual assessment. However, grading text-based questions, especially in large (>50 enrolled students) courses, is tedious and time-consuming for instructors. Text processing...

Text-based open-ended questions in academic formative and summative assessments help students become deep learners and prepare them to understand concepts for a subsequent test conceptually. However, grading text-based questions, especially in large (>50 enrolled students) courses, is a tedious and time-costing process for instructors. Text process...

Abstract Electro-hydraulic vibration equipment (EHVE) is widely used in vibration environment simulation tests, such as vehicles, weapons, ships, aerospace, nuclear industries and seismic waves replication, etc., due to its large output power, displacement and thrust, as well as good workload adaptation and multi-controllable parameters. Based on t...

In order to relieve the linkage between the inlet and outlet of the hydraulic actuator, an independent metering control twin-valve is proposed. It can achieve the independent control of the load port based on the dislocation combination of the two unit-body spools. According to its working principle, a mathematical model of the valve-controlled hyd...

In order to improve the vibration waveforms simulation accuracy of electro-hydraulic vibration devices, a twin-valve independently controlled electro-hydraulic vibration method was proposed based on the existing rotary-valve controlled electro-hydraulic vibration method and this allows the waveforms frequency, amplitude and bias to be accurately an...

At present, small and medium-sized factories have low automation and do not have a relatively complete industrial automation system. In the production process, it is usually necessary to use manpower to transport the raw materials to be processed from the warehouse to the assembly line, which is costly and time consuming. The research in this paper...