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An oxygen concentration control and monitoring device is developed, which can collect ambient temperature, humidity, and oxygen concentration, realize local display, local storage and network remote transmission functions, and use wireless power supply to run in the test chamber. Test chamber interface water seal. The growth verification test of aspergillus niger was carried out in the experimental device developed in this paper, and it was found that the growth of aspergillus niger on silk can be effectively inhibited under low oxygen conditions. When the oxygen concentration is lower than the threshold value of 0.7%, the growth of aspergillus niger is in a stagnant state.

This paper designs a control system for a cultural relic test chamber based on STM32. The system uses the STM32 processor as the underlying main control of oxygen concentration and humidity and uses an industrial all-in-one machine as the bridge to exchange the information between the cloud server and the bottom master controller. The oxygen concentration, humidity and temperature data of the test chamber can be stored on the server in real-time, and the alarm messages are sent through the cloud SMS platform. The results reveal that the oxygen concentration in the test chamber could be adjusted continuously between 0.6% ~ 10% VOL and the relative humidity could be adjusted continuously within 45% ~ 55% RH, and it can keep stable near the set value. The system can meet the requirements of oxygen concentration and humidity for most cultural relics preservation and can also provide a settable constant oxygen concentration and humidity environment for the related research of anoxic treatment and modified atmosphere technology.

For improving the collection efficiency of electrostatic precipitator (EP) in the pigsty, MATLAB & Finite element method (FEM) is applied to calculate RNG k-ε equations, corona equation and acoustic radiation equations to analyze sound field, electric field and particle trajectory in the wire-plate EP. The results show that fine particle agglomeration can be induced, so as to promote the enlargement of fine particles and improve the capture efficiency of fine particles at acoustic node area. Moreover, the particle distribution can be controlled according to the above V-η curve in the pigsty. In addition, η initially increases, and then decreases in the range of f from 1000 Hz to 2000 Hz. Therefore, the linear variation law of V– η & SPL – η & f – η provide scientific control method for the construction of green and efficient removal technology of particulate pollutants in the piggery.

Smart speakers have become more and more popular in recent years with the continuous development of artificial intelligence. In daily life, dialogues between users and smart speakers can realize music play now. Currently, most manufacturers have made smart speakers directly play the song that the user wants to listen to, or inserted a fixed-style copy before playing. To provide users with a better music experience and allow users to have a deeper understanding of songs, a radio-like approach is planned to be adopted, inserting some personalized music copy before smart speakers play music. In this article, TextRank-based automatic text summarization and keyword extraction methods are used to efficiently and automatically generate short, appropriate, and personalized music copy from the song library, and insert the copy before the smart speaker plays the song. This will not only increase the users’ music experience, but also allow users to express their emotions with music as sustenance. The research on the music copy generation technology of smart speakers can not only improve the music experience of users but also has a great impetus to improve the functions of smart speakers.

With the rapid development of robots in the world, robots in various application scenarios have come into people's sight, especially various inspection robots appear in people's lives. At present, the application of fire patrol robots is more and more. Now, the fire patrol robots used in the warehouse are all land patrol robots. When they work on the designated route, they have high requirements for the environment. When there is a complex environment with uneven ground, it will have a great impact on the robot. This rail mounted fire inspection robot is running on the track, and the platform can be inspected without dead angle. It has low environmental requirements, high inspection efficiency, real-time alarm, and uses computer vision platform to track, which improves the accuracy of fire source identification. In this design, STM32F4 single chip microcomputer is used as the main control of the whole system, which is completed with a number of servo motors, alarms and other hardware, and computer vision and robot main control data interaction.

Primer helps to enhance the adhesive force of the tape and the substrate. Different reinforcements on different substrates have different amplitudes. The order of increase in initial bond strength is PC> PVC> PP> PET>> PE. The order of increasing holding power after 7 days is PP> PVC> PC> PET>> PE. The primer has better adhesion on the modified tape than on the unmodified tape. High temperature and humidity are not conducive to the enhancement of the primer. The polar substrate has a more pronounced reinforcing effect. Ultraviolet (UV) irradiation can initiate group polymerization cross-linking to increase the tackiness. With the increase of irradiation power, the adhesive strength of the adhesive layer gradually increased and reached stability at around 3000mJ. The effect of ultraviolet irradiation on the shearing force of the adhesive tape on the glass substrate is significant,the decrease is greater than 60%. With the increase of the irradiation power, the maximum deformation of the tape decreased, and the rebound rate remarkably increased from 10.7% to 62.5%.