Yuanjun CAI

• Developed and maintained a refrigerator debugging tool, enabling data communication with hardware devices via serial port.
• Designed and implemented the graphical user interface (GUI), incorporating modules for serial port settings, data receiving and sending, device control, and status monitoring, which enhanced device management efficiency and user experience.
• Automated testing processes and optimized data transmission mechanisms, improving system stability and response speed.
• Developed remote control and real-time monitoring features for refrigerator subsystems, including cooling, heating, and lighting systems, ensuring proper device operation.
• Gained in-depth knowledge of Python for host machine software development, demonstrating ability to independently handle complete software projects from interface design to core communication implementation.

• Quickly mastered serial communication protocols and GUI development frameworks, enabling independent task completion.
• Demonstrated excellent teamwork by collaborating harmoniously with colleagues, understanding requirements swiftly, and proposing effective solutions.
• Maintained a proactive attitude, completing tasks on time and providing constructive suggestions and optimization plans, earning recognition from colleagues and supervisors.
• Overall, showcased outstanding performance with a solid technical foundation, strong communication skills, and effective teamwork, positioning for future success.

• Participated in photovoltaic air-conditioning project, building and debugging related circuits to support inverter testing.
• Gained understanding of hardware components, including DAB (Dual Active Bridge) converter, PFC module, and MPPT module, along with deeper knowledge of complex circuits.
• Learned and mastered circuit simulation software such as MATLAB Simulink and LTSpice, enabling simulation and analysis of intricate circuits.
• Enriched expertise in electrical engineering, including basic structures, classifications, and advanced technologies of various home appliances.
• Developed new insights into the home appliance industry's evolution, informing future career planning and direction.
• Worked conscientiously, applying school-learned knowledge flexibly to complete tasks with high quality and efficiency.
• Actively sought advice from experienced seniors, listened to suggestions with an open mind, and incorporated feedback to resolve work challenges.
• Strictly adhered to company rules, regulations, and internship arrangements while fostering positive relationships with colleagues.
• Demonstrated excellent teamwork and communication skills, earning affirmation from staff for overall performance.

Volunteer at VOBAY. VOBAY is a student CAS group that goes to the Blockhouse Bay Community Centre to help out on various jobs such as poster making, and technology aid. We also tutor the senior members of society (also other age groups) and solve their technology problems. Overall, we hope to contribute to the Blockhouse Bay community.

• Delivered engaging lessons on basic Chinese pronunciation and writing, highlighting the language's complexity and cultural appeal to foster interest among learners.
• Progressed instruction over time to enable participants to engage in simple conversations mixing Chinese and English.
• Taught initial consonants and vowels to build foundational phonetic skills.
• Explained tones and their importance in meaning differentiation.
• Practiced simple phrases incorporating tone variations for accurate pronunciation.
• Introduced personal pronouns and their usage in everyday contexts.
• Covered greetings to facilitate basic social interactions.
• Guided learners in understanding radicals as building blocks of characters.
• Instructed on writing simple words to develop handwriting proficiency.
• Helped identify and distinguish similar characters to avoid common errors.
• Taught counting methods and numerical expressions in Chinese.
• Demonstrated writing numbers in Chinese characters.
• Explained the use of "的" for expressing possession and ownership.
• Introduced frequently used verbs and their applications.
• Covered counting days and related time expressions.
• Assisted in constructing simple sentences for practical communication.
• Enabled learners to introduce themselves confidently in Chinese.
• Taught imperative sentences for giving commands and requests.
• Discussed weather-related vocabulary and phrases.
• Explored hobbies, including expressing likes, reasons for preferences, methods of engagement, and praising others.
• Introduced common food names to expand everyday vocabulary.

Tutor, IB Physics and Mathematics
Auckland International College

- Assisted students in practicing function translations and stretching transformations to enhance their understanding of graphical manipulations.
- Provided additional revision questions on quadratic equations, with a focus on calculating discriminants to reinforce problem-solving skills.
- Guided students in determining the equation of quadratic graphs using x- and y-intercepts and vertex form.
- Delivered physics tutoring on simple harmonic motion (SHM), including in-depth discussions of displacement, velocity, and acceleration graphs.
- Introduced and explained key concepts in polynomials to build foundational algebraic knowledge.
- Facilitated a deeper understanding of double-angle formulas through targeted explanations and examples.
- Applied double-angle and compound-angle formulas to solve specific textbook problems, improving students' application abilities.