The Application of Fuzzy Synthesis Evaluation Method on Assessing Bridge Durability

Assessment of the structure durability of concrete bridge in service is crucial for determining whether their service performance is meeting the design requirements or not. In this paper we classify the whole structure of bridge into two levels, i.e.bridge structure and bridge components. A two-level-multi-index model for evaluating the durability of concrete bridges in service is established based on the dependent functions of various factors, in which the dependent functions are chosen in accordance with the difference of various factors affecting the deterioration of durability of components. In this model, the durability of the bridge is divided into five different fuzzy levels: intact, disrepaired, damaged, severely damaged, and dangerous. Finally, based on fuzzy mathematics theory, the durability level of a bridge in practice is evaluated by using the maximum subordination principle.

Urban Land Suitability Evaluation Based on Fuzzy Synthesis Evaluation

The primary influencing factors of urban land suitability were analyzed, and evaluation index systems were proposed for urban land suitability. Based on AHP, the weight of every evaluation index was determined, and the evaluation model for urban land suitability was also established by fuzzy synthesis evaluation. Taking the urban land condition of plain country as an application case, and its urban land suitability was assessed based on the evaluation model. The research result shows that the degree of urban land suitability can be indicated with AHP and fuzzy synthesis evaluation, so it is a new effective method for the evaluation of urban land suitability.

Study on Influence and Evaluation of Coal Mining on Envionment

Through the synthetically analysis of the characteristics of coal mining and the environment quality of the mining area, the environment quality evaluation index system is formed: water and soil environment quality are the principal layer, the influence factors are measure layer. The evaluation degree of every factor is defined by fuzzy synthesis evaluation method and the environment quality level and the problem urgently to result are found, which provides theory support for environmental protection and green development.

Study on Application of Fuzzy Synthesis Evaluation Method to Expressways Sound Barriers

Sound barriers are more and more widely used for expressways, however, the already installed sound barriers lack a complete set of evaluation system. In this paper, the fuzzy mathematics theory was adopted to make a comprehensive evaluation of the sound barriers, in which 12 factors influencing sound barriers design were screened to establish an index system for sound barrier evaluation. On this foundation, Huang Luanzuang school along the Dan La expressway in Hebei Province was presented as calculated example for the fuzzy synthesis evaluation method application, which provides a new idea for evaluating sound barriers.

The Fuzzy Integrated Energy Prior-warning Model Based on Entropy Weight

Based on the analysis of five factors affecting energy risks, including supply and demand, economy, environment, transport, and disaster, this chapter establishes the prior-warning index system of the energy risk by covering 3 sub-systems and 37 indexes. The three sub-systems are the coal sub-system, the petroleum and natural gas sub-system, and the integrated factors sub-system. Fuzzy synthesis evaluation was applied to confirm the internal estimated index weight of the sub-systems. Moreover, the risk prior-warning model of the energy sub-systems was established by the method. The weights of the three sub-systems were determined through the concept of entropy weight, and the prior-warning indexes of energy risk were applied to evaluate the total energy security of the three sub-systems. Finally, the prior-warning model of energy risk in China was established. The entire situation of energy safety of China was summarized via empirical analysis.