Design and optimize the decoding codes of barcode scanners

* Hands-on experience in barcode scanner performance testing using precision optical, mechanical and electrical instruments, including interferometer, spectrometer, spectrophotometer and microscope

* Hands-on experience in Lens MTF checking and Lens focusing on hundreds of barcode scanner engines

* Hands-on experience in data collection and analysis, image processing and technical report writing

* Designed many optical and mechanical testing platforms and implemented hundreds of complex and precise tests and measurements on barcode scanner components, including engines, lenses, sensors, mirrors, exit windows, filters, diffusers, LEDs and laser diodes

* Developed an electro-mechanical system for swiping test of both laser and image based barcode scanners to obtain decoding time, location and volume under different swiping speeds

Thermal Homeostasis in Buildings

* Presented and demonstrated a new dynamic process design philosophy—thermal homeostasis in buildings to replace the ASHRAE’s static heat balance design philosophy

* In a homeostatic building, adequate thermal mass is applied to keep indoor temperature varying within a small range; natural energy is harnessed to maintain indoor temperature at a comfortable level using lower-power equipment, such as cooling tower; hydronic radiant conditioning system is employed to distribute heat or coolness effectively for avoiding over-heating or over-cooling; and large fenestration is designed for aesthetics, natural lighting and solar gain

* Built an RC (resistor-capacitor) model of a thermally homeostatic building in Matlab and Simulink

* Studied the requirements of building’s structural thermal mass systematically using the RC model

* Investigated the favorable climatic conditions of using cooling tower to achieve building homeostasis

* Found that the most favorable location has a largest diurnal temperature variation derived from the strong micro-climatic process of sea breeze, which can be a new kind of renewable resources

* Designed a small commercial building located in Paso Robles in AutoCAD Revit and by simulation confirmed the building to be homeostatic even with a large window-to-wall ratio of 45.1%

Dynamic Heat Transfer and Storage

* Investigated the dynamic heat transfer and storage performance of planar thermal mass under sinusoidal heating and cooling using analytical method and a self-built finite-difference calculation program in Matlab

* Found the maximum heat storage capacity of planar thermal mass at an optimal thermal mass thickness

* Developed innovative and accurate methods to replace the unsuitable lumped method used in most papers and software for thermal mass calculation in buildings

* Corrected rules of thumb by analyzing the time-lag effect and the decrement factor of planar thermal mass

* Designed and manufactured a pneumatic actuating mechanism for variable nozzle of JK90S VGT

* Drew a 2-D model in AutoCAD and a 3-D model in Pro/E for the pneumatic actuating mechanism

* Designed an electronic control system with Motorola MC68HC08 Micro Control Unit (MCU)

* Wrote control codes for the electronic control system with C language in Metrowerks CodeWarrior

* Developed a Printed Circuit Board (PCB) for the electronic control system in Protel 99 SE

* Tested the JK90S VGT on a Turbocharger Test Rig and obtained a performance MAP

* Built a less-than-5%-error simulation model of JK90S VGT and WD615.50 diesel in GT-POWER

* Improved engine power, torque and fuel consumption performance by applying VGT