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In recent years, the application of virtual reality technology in different fields has attracted the attention of society and academic circles. Some scholars connect virtual reality technology with ideological and political teaching, so as to further explore the new ideas of ideological and political teaching. This paper analyzes the meaning, characteristics and functions of virtual reality technology, and puts forward its current difficulties in ideological and political courses. At the same time, this paper also points out the implementation principles, approaches and strategies of virtual reality technology in the ideological and political curriculum teaching, in order to enrich the teaching methods in the ideological and political curriculum, and lay a research foundation for improving the educational quality of the ideological and political curriculum.

In order to effectively improve the management level and efficiency of urban lighting and realize the fully controllable "lighting on demand" operation mode, a new intelligent street lamp integrated system with Internet of Things is designed and implemented. The core control processor of this system is STM32F103C8T6 of ARM company, which is composed of two core control boards, namely information acquisition board and information transmission board. The system is equipped with microwave sensors and other auxiliary sensors to detect human vehicles. NBIOT module realizes wireless transmission of data to the cloud server; Then, the minimum modularization of lighting area and the dynamic programming control algorithm are introduced, so the remote intelligent control of the street lamp is realized, the energy consumption is greatly reduced, and the intelligent management is refined.

Laser marking technology has become a popular way of product information marking in industrial production. In order to improve the speed, accuracy, stability and other indicators of the laser marking machine, this paper realizes the design of an intelligent laser marking control software. Users can draw basic graphics in the drawing area. The software adopts the vector marking method. For the drawn content, you can perform basic operations such as movement, rotation and scaling without distortion. After the editing is completed, the software converts the graphics data in the drawing area into the marking data required by the lower computer through interpolation algorithm. After receiving the trigger signal sent by the PLC, the corresponding marking data and operation instructions are transmitted to the control board of the lower computer via USB, and the board drives the galvanometer deflection and laser energy output to complete the marking.

In this research, a method for recovering software's evolution history based on software architecture reverse was proposed, and the evolutionary binary-tree's constructing algorithm as well as the system for evolutionary binary-tree's construction are introduced. At last, we draw a conclusion that the method is effective by regarding three open source systems as experimental objects.