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The security of natural gas supply and demand has always been an important topic, and as a result, analyzing and predicting the supply and demand of natural gas has received considerable attention from researchers. Numerous studies have extensively researched the supply and demand of natural gas. The main purpose of this study is to explore the supply‐demand balance mechanism for natural gas security. A system dynamics model is constructed to assess the supply and demand of natural gas in Sichuan Province, China. A new system dynamics model based on domestic gas, production gas, ecological environment and natural gas supply is proposed. The study considers four scenarios: natural development, economic priority development, environmental priority development and coordinated development. The results show that the rapid economic development has led to an excessive environmental carrying capacity, a larger gap between natural gas supply and demand, a decline in the quality of life of residents, and even affected the energy security of Sichuan Province and China. The findings also show that people's overprotection of the environment can lead to slow economic development, which prevents it from achieving its desired goals. The coordinated development scenario in this paper not only ensures the production of natural gas and the quality of life of residents, but also is an optimal scheme with low energy consumption and pollution. According to the research conclusions, considering the overall situation of China's energy security and the situation in Sichuan Province, the author proposes reforms from the supply and demand sides of natural gas. [ABSTRACT FROM AUTHOR]

The article reports that acute myeloid leukaemia is a heterogeneous disease that has been explored in depth using cytogenetic and molecular techniques. Topics include examines allogeneic haematopoietic stem cell transplantation is a curative therapy for AML and considered relapse remains an important problem as extensive evidence has shown that Wilms' tumor gene 1 expression is a useful biomarker for measurable/minimal residual disease monitoring in AML.

We study the partial privatization of 53 Chinese stale-owned enterprises (by their listings on the Hong Kong Exchange over the period July 1993 to December 2002. We find that listing has led to a median increase of 70% in real net profits, 80% in real sales, 50% in capital spending, and a mild but nonsignificant improvement in coverage ratios, but no improvement in return on sales and a significant underperformance of returns against several market index benchmarks. Further investigation shows that firm performance is negatively related to state ownership, but positively related to legal-personal ownership and foreign ownership. [ABSTRACT FROM AUTHOR]