Eco-efficiency is of great significance in the attainment of a sustainable society, and is the most severe issue facing industrial sectors in China. In this work, a hybrid super-efficiency data envelopment analysis (DEA) was conducted to measure eco-efficiency and analyze the problem of inefficiency facing industrial sectors in China. DEA has been widely used in eco-efficiency analysis; however, existing DEA models focus on the evolution and comparison of eco-efficiency values, and do not consider the evolution characteristics of the input nor undesirable output inefficiency and neglect the radial and non-radial classifications of input and output indices simultaneously. Thus, this work proposes a hybrid super-efficiency DEA model which combines hybrid DEA with super-efficiency DEA, separating the input and undesirable output variables into radial and non-radial parts using variable correlations. For the panel data of the industrial sectors, the Malmquist index is introduced in this approach. Subsequently, this approach is illustrated using a real data set from 22 industrial sectors in China corresponding to the period of 2006–2015. Results show that eco-efficiencies of the 22 industrial sectors increased consistently from 2006 to 2015. Due to a lack of momentum in sustained growth, technological progress regarding the improvement of eco-efficiency requires acceleration. More and more sectors have achieved rapid enhancements in input and undesirable output inefficiencies, but 10 traditional sectors with high resource consumption and heavy emissions of pollutants remain inefficient.

OBJECTIVETo get the information of patients' understand to the knowledge of artificial teeth prosthetics, provide reference for the propaganda of the prosthetic knowledge.METHODS500 patients were chosen as the research objects. The survey about patients' understand to the knowledge of artificial teeth prosthetics was made with a reasonable questionnaire designed by us. The questionnaire contained nine sections. The questionnaires were filled in by the patients, dispatched and received by special messengers. The information of the questionnaires was analyzed and summarized.RESULTS477 effective questionnaires were received. Patients were more familiar with the knowledge of the opportunity to get the oral prosthetic and less familiar with the knowledge of common problems after the oral prosthetic, the curing process before the oral prosthetic and the visiting times of the ordinary cure. However, they were not familiar with the knowledge of the basic concepts of the oral prosthetic, prosthetic materials and construction of dental prosthetic restoration and announcements after the oral prosthetic. They were most unfamiliar with the knowledge of common problems in the oral prosthetic process.CONCLUSIONThe propaganda of the oral prosthetic should focus on the basic concepts of the oral prosthetic, prosthetic materials and construction of dental prosthetic restoration, common problems in the oral prosthetic process and announcements after the oral prosthetic. Meeting such problems, dentists should explain them to the patients patiently.