Over half of China’s total energy consumption is attributed to rural buildings. However, unlike the research into urban areas, few studies have explored the problems of building energy efficiency (BEE) in rural China. This study aims to establish an appropriate strategic plan for promoting rural BEE (RBEE) in China by conducting a strength-weakness-opportunity-threat (SWOT) analysis. Analysis data are obtained from multiple sources, including a comprehensive literature review, governmental reports, related regulations, and semi-structured interviews with a number of critical stakeholders. A matrix of the SWOT analysis is derived to reveal the drivers and barriers in the course of implementing RBEE. Five critical strategies are proposed. We also attempt to explore the internal and external conditions of RBEE in China, which can contribute to the customization and prioritization of policy recommendations for the Chinese government.

Urban renewal and the built environment have become two of the hottest topics in urban planning studies. Although existing literature has started to examine both of them from different perspectives, a comprehensive review with a bibliometric analysis is necessary to fully reveal the association between them. To overcome these gaps, this paper critically reviews the literature on urban renewal and the built environment and proposes a novel research framework to systematically understand the relationship between them. Based on 155 articles which were published between 2001 and 2020 collected from the Web of Science Core Collection Database, a bibliometric analysis offers the overall development and trajectory of the existing research, and a critical review fully analyzes the relationship between the two topics from three perspectives: main categories of urban renewal, multiple stakeholders, and economic, social and environmental development needs. To better clarify the interaction mechanism between urban renewal and the built environment and guide further research in this area, a future research agenda is also provided.

The paper studies on wet flue gas desulfurization process and the factors of affecting the desulfurization efficiency, and analyses the control system of the absorber slurry pH value. The conventional PID control is difficult to achieve satisfactory control effect, so it puts forward the predictive control scheme based on Dynamic Matrix Control (DMC) algorithm to identify and control the change of pH value. Simulation results show that under the control of DMC algorithm, the slurry pH value has a good tracking for setting input and its changes , reflecting a high degree of adaptability. The control with low overshoot and good accuracy is better than conventional PID control and meets the requirements of real-time control.