Integrated circuits has been widely used in areas like computing, communication and electronic security, and it's the foundation of many emerging areas such as AI, IoT, 6G. This virtual issue collect 6 ariticles, covering topics such as CMOS-based THz communication system, SRAM, hardware Trojan detection, 3D IC, etc.

Deep learning is one of the most important area of artificial intelligence. In the past few years, deep learning has achieved remarkable results in many fields such as speech recognition, image classification, text semantics, natural language processing. Focusing on research results in these fields, this virtual issue collects 6 relevant articles.

With the continuous evolution of 5G and the successive development of 6G research, Internet of Things technology, as one of the important scientific and technological trends, has developed rapidly in various fields in recent years. Wireless sensor networks (WSN), as a core component of the Internet of Things, have also been greatly developed. Wireless sensor network technology has a wide range of application prospects and important scientific research value, and its development and application have had a profound impact on many fields such as infrastructure, health care, environment, military defense, automation, and so on. This virtual issue launched 5 articles related to wireless sensor network technology.

Recently, ChatGPT, a natural language processing model developed by OpenAI, once made headlines and gradually began to emerge in many industries, and many people began to feel that it is not just a dialogue tool on the surface, but a real artificial intelligence that can create productivity. The success of ChatGPT is inseparable from the rapid development of large-scale Pre-trained Language Model (PLM) represented by BERT and GPT. In the last few years, these models have had a lot of success in the large field of natural language processing (NLP). This virtual issue focuses on natural language processing, featuring eight articles in this broad field, covering topics such as text classification, named entity recognition (NER), POS tagging, question answering models, and BERT applications to bioinformatics.

This virtual issue on satellite communication and navigation technology contains 10 articles published in CJE from 2020 to present. These papers cover the research topics  with respect to some applications of satellite communication and satellite navigation.

We are constantly using computer vision to grab images, interpret their meaning, and store them for later use. Image classification in computer vision is a very large research field, including a variety of technologies, with the popularity of deep learning, image classification has developed rapidly. Image classification is and will continue to be the most popular computer vision subfield in the next decade. This virtual issue collects 7 related articles on Image Classification from 2020 to 2022 based on this research direction. Welcome to read them.

The virtual issue on CMOS technology contains 5 articles published in CJE recently. These papers cover the research topics ranging from analysis and fabrication of CMOS components to CMOS sensors design.

This virtual issue is a collection of 5 articles published in CJE in the last two years for the research on compressed sensing.

With the development of artificial intelligence, machine learning has entered more and more practical application fields. In the practical application of machine learning, the number of features is usually large. Feature selection can eliminate irrelevant or redundant features, so as to reduce the number of features, improve model accuracy and reduce running time. Focusing on this research topic, this virtual issue collects 9 relevant articles on feature selection from 2016 to 2021.

This virtual issue summarizes the most recent research results on various disciplines of electromagnetics and antennas, promoting the new progress of theories and methodologies. 7 papers are selected with domains ranging from antenna design and evaluation, EMC in High-speed railway system as well as analysis and evaluation of electromagnetics disturbance in various scenarios.