The design of an experimental apparatus and its teaching mode are proposed for simultaneously visualizing the flow and the spray of gaseous fire suppressants, whose flow is complex and invisible. With electrical capacitance tomography and laser shadowgraphy, the flow pattern in the pipe and the structure of the spray out of the nozzle is visualized. Meanwhile, the details of the temperature and pressure in the discharging system are acquired synchronously by the sensors with high sampling frequency. Conducting experimental teaching on this apparatus, students could observe directly the discharging process of fire suppressants, master the measurement methods of the related key parameters, and develop interdisciplinary concepts and innovative spirits.

A hardware-in-loop visual test platform of transformers and induction motors is designed, which is mainly composed of DSP controller, MCGS touch screen, RS485 communication circuit and power module. DSP TMS320F28335 is the main controller of the test platform, which calculates the mathematical models of various transformers and induction motors under different experiments. MCGS touch screen is the upper computer, which is used to realize parameter input, waveform curve and internal magnetic field visualization of the motors. The RS485 circuit is utilized to transmit motor parameters and experimental simulation results between the controller and the touch screen. The data transmission protocol is Modbus RTU protocol. The platform has low hardware cost and good portability. Visualization of data, waveform curve and magnetic field can help students deepen their understanding of professional knowledge. The test platform meets the needs of experimental teaching and has achieved good teaching results.

To optimize the process of aseptic preparation and maintenance for BD FACSAria cell sorter to maintain long-term stable sterile sorting state, the cost of aseptic preparation, operation process and system stability are optimized. The method of monitoring the aseptic status of the fluidics system with LB medium is explored, and the aseptic sorting status and long-term culture of HCT116 cells are observed. The optimized aseptic preparation methods simplify the operation process, save the cost, and can keep the aseptic state of the instrument liquid flow pipeline for a long time. HCT116 colorectal cancer cells are sorted and cultured in antibiotic-free medium for a long time without contamination. The optimized aseptic preparation methods and maintenance procedure of BD FACSAria sorter provide a simple and feasible scheme for the operation and management of the instrument, and provide high-quality and stable aseptic sorting services for scientific research.

The hydraulic systems of new deployed equipment are complicated and practical equipment training has the potential risks of breakdown and safety. To solve these problems, an experiment training stand is developed based on the semi-real hydraulic system and virtual models. The 3D modeling software and Unity3D are used to model the system and integrate and control the animations. The designed interface module includes the data acquisition and control card based on the core chip STM32F407IGT6, the operation control unit and the sensors, which realizes the data transformation between the semi-real system and virtual model. Taking one type of integrated gearbox hydraulic system as example, different training functions of this stand, such as constructing principles and fault diagnosis, are fulfilled and illustrated. The application shows that by using the experiment training stand based on HIL, the theory and practical training are integrated deeply, and the problems of the complicated hydraulic systems training such as obscure construction and principle and insufficient practical training are solved effectively.