China has incorporated STEM education into its national strategic development policy, calling on society, schools and indi- viduals to pay extensive attention to STEM education and the cultivation of innovative talents. By sorting out the origin, develop- ment and implementation process of STEM education, the article puts forward three main controversies in the implementation of STEM education today: over-focus on technology without following the laws of education; over-focus on the acquisition of results and not on the evaluation of knowledge mastery level. Finally, the article proposes that STEM education needs to work together from the macro system level, school education level and family social level, in order to train STEM teachers to promote students’ self-efficacy, and to promote students' fairness in STEM education with family and social life planning and guidance awareness. It is hoped to explore on the STEM education model with Chinese characteristics and achieve the educational goal of STEM education.

Based on the background of "double high" construction, this paper analyzes the current situation of the integration of pro- duction and education of artificial intelligence major in higher vocational colleges. According to the characteristics of artificial intel- ligence specialty in higher vocational colleges and the large-scale demand of society, it puts forward the teaching mode of produc- tion and education integration of artificial intelligence specialty, the training mode of professional talents, the mode of school-enter- prise cooperation, and the model of innovation and entrepreneurship. It provides a feasible scheme for the cultivation of artificial in- telligence talents in higher vocational colleges.

To suppress interference signals in millimeter wave communications, especially narrowband interference signals, a receiv- er algorithm based on frequency domain with fast convergence is proposed. The algorithm introduces the weight leakage factor and the convergence factor, which proves the superiority of the algorithm proposed in this paper in suppressing the narrowband interfer- ence of the system under the same environment from both theoretical and simulation aspects. Whether in terms of convergence speed or bit error rate performance, the new algorithm can achieve a good result. This algorithm can enable the ultra-wideband re- ceiving system to achieve rapid convergence and reduce the impact of narrowband interference on system performance.

C Language Programming is a professional fundamental course in the major of Computer Application Technology. Through this course, students are expected to master the rules of basic sentences, the grammar of C language and the ability of sim- ple programming. Regarding the current status and problems, a new approach of mixed teaching design is explored and expected to achieve better results.

MOOC, Microlecture and Flipped Classroom have become the main direction of future education development. SPOC is the inheritance and development of MOOC. It has some improvement and optimization in teaching form and teaching mode. Aiming at the various problems existing in the course of College Computer Foundation and relying on the super-star teaching platform, this paper constructs the SPOC mixed teaching mode according to the design and development of teaching resources, the teaching activi- ties, the design of evaluation system and so on. The teaching mode strengthens the reform and innovation of the original teaching mode of the basic computer course, promotes the quality of classroom teaching and improves students' autonomous learning ability. Through the comprehensive evaluation of teaching, it is found that the application of this teaching mode has achieved remarkable re- sults.

In order to solve the defects of single calculation direction, inaccurate positioning and poor edge connectivity in traditional Sobel operator image edge detection, this paper proposes an image edge detection algorithm that combines Butterworth high-pass fil- tering and improved Sobel operator, and uses the combination of the two techniques to perform edge detection and feature extraction on images. Firstly, the image is pre-processed by the Butterworth high-pass filter, then the improved Sobel operator that adds six - direction templates is used to the traditional Sobel operator for edge detection. Through experimental simulation, compared with the traditional algorithm, this algorithm has the following advantages: prominent edge, good connectivity, low sensitivity to noise, high positioning accuracy.

The rapid development of information technology has promoted the popularization of social media applications. Social me- dia has become a platform for users to search for real-time information and communicate and interact. Privacy protection is an im- portant symbol of the progress of human modern civilization. While enjoying the benefits brought by social media, human rights al- so face unprecedented challenges. Therefore, the protection of privacy highlights its importance. This paper analyzes the information leakage of Facebook users in order to discover the various risks faced by the privacy protection of social media users. Then it re- views the user privacy protection measures of major social media platforms at home and abroad. Finally, it is recommended that the government level should speed up the improvement of the social media platform user privacy supervision system, the enterprise lev- el should strengthen the implementation of the social media platform user privacy protection subject responsibility, and the user must improve personal information security literacy and protect personal information and privacy together.

Energy maintenance of wireless sensor network nodes is not easy to achieve, so energy saving is one of the main consider- ations in network design. Based on the study of hierarchical cluster-head LEACH algorithm, an improved algorithm—NLEACH al- gorithm is proposed. K times of the ratio between the residual energy of the node and the total energy of the system is introduced as the residual energy factor in the threshold calculation, which affects the change of cluster head number and network life cycle. In ad- dition, for nodes with different residual energy, nodes with more residual energy can act as cluster heads with high probability, in or- der to take advantage of the energy of each node. Through MATLAB simulation experiment, the results show that compared with LEACH algorithm, NLEACH algorithm prolongs the network life cycle and increases the data transmission volume.

The information technology represented by Internet communication has gradually become the core foundation to pro- mote human development. Human society has also gradually stepped from the information age to the intelligent age, opening the seventh information revolution and welcoming the arrival of 5G era. 5G will combine with big data, cloud computing, arti- ficial intelligence and other information technologies, connect everything, aggregate platforms and drive industries, playing a huge role in scientific and technological progress and social development. Based on the characteristics and development trend of 5G era, this paper summarizes the advantages and challenges of 5G era, makes a brief analysis on the security problems of computer network information, and puts forward corresponding solutions.

According to the construction characteristics of the optical fiber access network，the need for new single-mode optical fi- ber products which are resistant to bend is proposed in this article，and then describes the classifications of the G.657 fiber，the main technical standards of the G.657.A2 fiber and the typical ways of improving the fiber bending performance． And finally it cal- culates the number of fiber modes，cut-off wavelength，bending loss，dispersion and mode field distribution and other performance parameters of the G.657 fiber by the OptiFiber simulation system．

Due to the complexity of the ROADM network, it is difficult to arrange service routes manually. This paper analyzes ser- vice route strategy of ROADM network, deeply studies on the idea of the Floyd algorithm. It provides an algorithm idea about realiz- ing service route strategy based on the Floyd algorithm.

With the rapid development of science and technology in the information age, video surveillance plays an important role in banks, hospitals, hotels and other public places, providing an important way for the application of public security investigation and judicial evidence collection. However, due to the influence of illumination and environment, the image quality is not ideal in some cases. Therefore, how to achieve video image enhancement under the existing conditions has been a hot research topic. Traditional image enhancement algorithms only deal with a single frame image, but the image itself contains less information and the processing effect is not ideal. In this paper, an improved super-resolution reconstruction algorithm based on POCS is proposed, which recon- structs multiple degraded YUV video images with low resolution into one frame with high resolution. Compared with the traditional gray transformation and histogram equalization algorithm, the effect of video image enhancement proposed in this paper is obvious- ly improved.

In recent years, home intelligence has become the trend of the development of life, people have higher and higher require- ments for the degree of home intelligence, and intelligent electrical equipment is more and more popular and recognized by every- one.Aiming at this situation, an intelligent control system is designed for the humidifier. The system uses a single chip microcomput- er as the control core and combines monitoring, control, display, alarm and execution modules to realize the real-time monitoring, alarm and control of air temperature and humidity, providing more convenience for intelligent family and providing some preference for the intelligentization design of electronic equipment.

In the construction of urban drainage information platform, the amount of rainfall data and water point data is huge. At the same time, it is necessary to combine multimedia data to monitor the drainage points. Based on this, the author takes advantage of MongoDB and the GridFS multimedia module to propose a solution to the storage and management of large amounts of data and multimedia data generated by drainage facilities.

With the continuous improvement of IT technology, informatization and digitization have become the important driving en- gines for the management improvement and business promotion of most medium and large enterprises, and the demand for informa- tion system software of various types of enterprises is also increasing. However, in terms of software cost evaluation, it is difficult for Party A and Party B to reach an agreement on the project scale, workload and R & D cost, so the unified evaluation standard and basis are urgently needed. This paper introduces the function point method, and explains the application of NESMA function point method in software cost in detail, which provides a standard for the unified understanding of project Party A and Party B, and pro- vides the basis for enterprises to standardize the cost evaluation system.

In view of the characteristics of high-dimensional, unbalanced and multi-category employment data, in order to further im- prove the accuracy of decision tree method in the employment prediction of college students, an employment prediction model based on LightGBM is proposed. First the improved ADASYN sampling algorithm is used to increase the minority class in the data sam- ple, and then the employment data after balance is used for training LightGBM algorithm, and Bayesian model is used for parameter optimization to get the final employment prediction. Finally the prediction model is analyzed to measure the influence of each fea- ture on employment. The validity of the proposed method is verified through the data set of unbalanced employment data of college graduates, and compared with various unbalanced classification methods. It is proved that the proposed model has better prediction performance.

Latest developments of embedded technology are studied in terms of hardware, software, system, application and safety. Technical trends are summarized, such as diversity in hardware, open source in software, PC-likeliness in system, intelligentization in application, and focus in safety.

In order to prevent coronavirus from spreading to the campuses, all universities carry out cloud teaching during pandemic prevention. It is difficult for most teachers to use this teaching mode for the first time. Taking Database Programming course as an example, this paper explores on the cloud teaching mode from course construction, teaching activity design and teaching methods by the "Supertar Fan Ya" platform, and makes full use of various network resources for cloud teaching. It is hoped to provide experi- ence reference for practicing online teaching mode.

Since the National Implementation of Innovation and Entrepreneurship Education for college students, the majority of un- dergraduate students have obtained great benefits. Both the innovation and entrepreneurship ability and practical ability have been improved greatly, which has laid a good foundation for going to the society. However, there are still some problems in the process of application, project establishment, organization and implementation of innovation and entrepreneurship project, and there are still loopholes in the management of innovation and entrepreneurship project of college students in quite a number of colleges. The au- thor puts forward some suggestions and opinions on how to manage the innovation and entrepreneurship projects of university stu- dents so as to make more breakthroughs in project management.

The report of the 19th National Congress of the Communist Party of China clearly put forward the major reform task of deepening the integration of production and education, and successively issued guidance opinions and action plans. How to take root in China to run education and build high-level application-oriented universities is the general trend of local colleges and universities in the new era. However, there are many problems in the operation, which need to be solved one by one through relevant measures.

Education informatization promotes the research and practice of the construction of online open course for high-quality re- sources in higher vocational colleges, and provides a network platform and space for students' individualized, autonomous and coop- erative learning. Taking Base Station Operation and Maintenance course construction as an example, this paper expounds the ideas and implementation schemes of online open course construction from the aspects of overall goal of curriculum construction, curricu- lum structure, way of curriculum content construction, teaching design of each unit, construction of three kinds of teaching resourc- es, selection of teaching resource platform, etc.

Based on the analysis of students' learning situation in private higher vocational colleges and the current teaching situation of database basic course, and according to the precise positioning of enterprise post demand, the training objectives of database basic course in higher vocational colleges are proposed. Driven by the curriculum training objectives, this paper introduces the teaching de- sign from the aspects of curriculum ideological and political, teaching software platform, teaching resources, teaching projects, teach- ing content, teaching methods, teaching evaluation and learning evaluation effect, so as to build a high-quality curriculum teaching system