CNS main journal is the core resource of China Natural Science Engineering Academic Papers Retrieval System, and it is a full-text database sponsored by China Institute of Science and Technology Information and supported by the national key research and development plan "Research and development of basic environment and key technologies of digital publishing excellent books".

The construction of CNS main periodicals aims at improving the research level and development speed of natural science and engineering in China and promoting the coordinated development of science, technology, economy and society in China.

CNS main journal contains more than 7,000 kinds of domestic and foreign core journals from 65438 to 0998, including papers in natural science and engineering technology, covering physics, chemistry, biology, medicine, environmental science, materials, energy, computer science, electronics, communication and other disciplines, aiming at providing comprehensive information services for researchers, engineers, teachers and students.

The main periodicals of CNS are characterized by complete content, wide coverage, good timeliness and accurate retrieval. The database provides full-text download, full-text retrieval, author and institution retrieval, document delivery and comprehensive document data analysis, providing users with efficient, accurate and comprehensive academic information services.

At the same time, CNS evaluation system jointly launched by CNS Journal and China Knowledge Network also provides scientific evaluation and analysis tools for researchers and institutions to help them carry out academic research better.

CNS major journals have extensive influence and reputation in academic circles at home and abroad, and are one of the most authoritative and important academic paper retrieval databases in natural science and engineering technology in China.

The construction of this database is also an important booster for China to achieve scientific and technological innovation and catch up, which has played a positive role in promoting the development of science and technology in China and improving the research level in natural science and engineering technology.

The main part of the nervous system. Its position is often located in the central axis of animals, and it is composed of obvious brain ganglion, nerve cord or cerebrospinal fluid and their connecting components. In the central nervous system, a large number of nerve cells gather together to form a network or circuit organically.

The central nervous system receives incoming information from various parts of the body, integrates it into coordinated motor output, or stores it in the central nervous system as the neural basis for learning and memory. People's consciousness, psychology and thinking activities are also functions of the central nervous system.