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Microbial, physicochemical, rheological, and microstructural changes of surimi prepared by pH shift methods and the traditional water-washing method during cold storage were investigated. The starting aerobic mesophilic count (AMC) of pH shift surimi was around 1 log CFU/g lower than water-washed surimi, suggesting antimicrobial effects of the pH shift. All samples could be stored for 5 to 6 days based on the AMC results. Throughout the storage, the gel strength of alkaline-treated surimi increased from 204.2 to 491.9 g, while water-washed surimi decreased from 462.1 to 172.9 g. After the storage, alkaline-treated surimi showed lower total volatile basic nitrogen (TVB-N) value and smaller network hole size that was suitable for incorporation of moisture and starch. It also remained its rheological properties comparing with acid-treated surimi, with better odour properties, less protein degradation, and better network formation. The results indicate that alkaline-treated surimi is more suitable for cold storage.

Along with improvement of light emitting diode (LED) technology, luminescence safety guiding facilities have been applied widely on China's highways, especially in mountainous areas. However, it is difficult to carry out scientific assessment of the application effect. In reference to the program "luminescence safety guiding technology application in Lhasa-Gongga airport highway construction," a hierarchy criteria system is created, based on the determination of assessment criteria and weights. According to fuzzy set transformation principle, factors are defined by membership function to create judgment matrices and then criteria of different layers are evaluated by qualitative or quantitative analysis. Finally, the application effect of luminescence safety guiding facilities is evaluated by fuzzy synthesized judgment.

Aimed to improve stability and sustainability, maintenance assessment evaluates the running status of highway electromechanical systems by use of a scientific and reasonable evaluation method. Many complex components, such as different divisions with specific technical criteria, form a multi-criteria, multi-level evaluation system. Different from completion acceptance assessment, there is ambiguity in the qualified judgment of maintenance assessment. FAHP (fuzzy analytical hierarchy process) introduced in this paper is applied in the maintenance assessment of highway electromechanical systems, which is based on the research of AHP (analytic hierarchy process) and a fuzzy comprehensive evaluation method. This evaluation method can quantify qualitative criteria with the Delphi method, determine a subordinate degree by triangle function, set weight matrix by AHP, and establish a hierarchy fuzzy evaluation model with judgment matrix. At the end, the assessment result is normalized. To resolve the contradiction and complexity of maintenance assessment, this paper applies FAHP which combines both qualitative and quantitative criteria with typical cases.