Design of Network-Assisted Teaching of Ideological and Political Courses for College Students Based on Android System

In order to be able to provide learning resources for learners anytime and anywhere and improve the quality of online teaching, a network-assisted teaching system for college students’ ideological and political courses based on the Android system is designed. The characteristics of the Android system platform and its hierarchical structure are analyzed, and the overall structure of the network-assisted teaching system was designed based on it and through the construction of the system user login module, learning resources module, operation management module, unit test module, and teaching interface display module, so as to achieve the effect of network assisted ideological and political course teaching. The preferences of students were fully considered, the needs of students with different resource spaces were matched, and the genetic algorithm is used to share the information of network teaching resources to meet the needs of ideological and political teaching. According to the experimental results, the system designed in this paper has high accuracy in the recommended content of ideological and political education resources and the coverage of resource recommendation is relatively high, indicating that the application effect of the system is better.

POWER EQUIOMENT CONTROL SYSTEM OF A SHUNTING LOCOMOTIVE WITH AUTOMATIC SPEED CONTROL ALGORITHM

Work objective is to develop an algorithm for automatic speed regulation and to ensure its integration into the system of adaptive combined control of the power equipment of the locomotive TEM7A. Research methods: methods of the theory of automatic control, modern programming methods, trial trips. Research results and novelty. For the first time, the problem of automatic maintenance of "creeping" train speeds with high accuracy has been solved in the practice of domestic locomotive construction. It is established that the developed algorithm for automatic control of the humping speed and splitting up of shunting locomotive TEM7A allows maintaining a given speed in the range of operating speeds up to 8 km / h. Conclusion. The developed algorithm is integrated into the microprocessor control system of the power equipment of TEM7A shunting locomotive and does not require additional costs when through the locomotive operation. Maintaining a uniform speed of movement can also be used in the mode of manual control of the locomotive by the driver, while the value of the stipulated rate is set by the driver using the display module of the control panel.

Design of stepper motor driver based on STM32

In the field of industrial control, stepping has been widely used as an actuator. For this article, based on STM32F103 as the control core, the functions of start and stop, forward rotation, reverse rotation and speed regulation of the stepping motor are realized through four buttons. The system uses L293D to drive a stepper motor, LED0 and LED1 two status lights display the motor’s forward and reverse rotation status, and the digital tube displays the current stepper motor speed. The whole system includes L293D module, button module, status light module and speed display module. The whole system is modeled, theoretically analyzed and simulated based on the drive control principle of the stepper motor, and the precise and stable control performance of the system under different occasions is further verified through experiments.

Augmented reality and virtual reality displays: emerging technologies and future perspectives

With rapid advances in high-speed communication and computation, augmented reality (AR) and virtual reality (VR) are emerging as next-generation display platforms for deeper human-digital interactions. Nonetheless, to simultaneously match the exceptional performance of human vision and keep the near-eye display module compact and lightweight imposes unprecedented challenges on optical engineering. Fortunately, recent progress in holographic optical elements (HOEs) and lithography-enabled devices provide innovative ways to tackle these obstacles in AR and VR that are otherwise difficult with traditional optics. In this review, we begin with introducing the basic structures of AR and VR headsets, and then describing the operation principles of various HOEs and lithography-enabled devices. Their properties are analyzed in detail, including strong selectivity on wavelength and incident angle, and multiplexing ability of volume HOEs, polarization dependency and active switching of liquid crystal HOEs, device fabrication, and properties of micro-LEDs (light-emitting diodes), and large design freedoms of metasurfaces. Afterwards, we discuss how these devices help enhance the AR and VR performance, with detailed description and analysis of some state-of-the-art architectures. Finally, we cast a perspective on potential developments and research directions of these photonic devices for future AR and VR displays.

ROBOT PENJELAJAH BERODA AUTONOMOUS

The wheeled robot design consists of various modules with their own functionalities. We chosethe components based on theirs specification, autonomous functionality, and in theirs prices. We assembledthese components as modules. The modules in this design are power supply module, processing modulewhich is used ATMega 328 microcontroller, distance sensor module, line sensor module, wirelesscommunication module, motor driver module and actuator module which is used DC motor. Systemperformance indicated with: Able to follow square, triangle, synes conture and stopping ability. Experimentshawed that all of the modules worked as design. The robot could navigate according to contoursautonomously. We tested by using a display module. We gave inputs and then feeded to processing modulethrough bluetooth. From the experiment, it can be concluded that the robot which was using wall followingmethod could be controlled well. The PID controller performed well so the navigation could be stable. Thestable condition was achieved under 3 seconds. But the performance criteria had not been achieved becausethe maximum overshoot was 41.2% which was far from the limit of 10%.

Bluetooth Based Large Screen Display System

Notice board is ideally useful tool for organizing and displaying information, these are used in multitude of businesses such as schools, colleges, railway station etc. In this project, we proposed an advanced wireless notice board in which at any time we can add or remove or alter the message according to our requirement. The main aim of this proposed project is to drastically reduce the cost involved, consume smaller amount of power and help in achieving quality of service. Wireless electronic notice boards are a faster alternative to conventional pin-up type notice boards. In this Project we are going to use a 32x16 LED dot Matrix display module which is also known as P10 LED Display Module to display a Scrolling text by using Arduino UNO.