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Based on the analysis of the internal control theory of Listed Companies in China and the United States, it is found that there are some differences in the definition, objectives and elements of internal control between China and the United States. The analysis shows that the internal control of Listed Companies in China is generally effective from 2013 to 2017, but it is decreasing year by year. Comparing the operation of Chinese and American listed companies in 2017, it is found that there are still significant differences in performance and internal control early warning system of different industries. The empirical results show that corporate governance level, marketization, information disclosure, internal control evaluation and weak audit links are the main reasons for the performance differences between Chinese and American listed companies. Therefore, some reasonable suggestions are put forward to improve the corporate governance mechanism and internal control efficiency. [ABSTRACT FROM AUTHOR]

Polyformaldehyde (POM) is a modern engineering plastic with excellent characteristics and there is a huge demand for it in China and the world. An industrial plate dryer process with nitrogen protection was newly developed to meet the emerging needs for big-scale and energy-efficient dryers in the production of POM. The plate dryer developed has a production capacity of 43 tons/day POM powder and a thermal efficiency of 78%. A field test report shows that the dryer allows a reliable and smooth operation and meets the quality specifications for POM powders. [ABSTRACT FROM PUBLISHER]

Industrial drying technology in Chinese industry has been developing rapidly since the early 1980s. In the past 30 years, many products on both a small and a large scale have been initiated. The number of dryer varieties made in China has expanded from 10 to 60. About 20,000–30,000 dryers are made in China each year. Review of this development indicates that the tremendous progress in drying technology is due to a series of policy decisions and measures that were carried out, such as imported technology assimilation and further improvement of advanced overseas technology combining production and research and development. Drying technology development has benefited from the rapid economic development in China as well as market pull and market competition. Some suggestions are also put forward for future trends in this industry. [ABSTRACT FROM AUTHOR]