Function Index System Research Articles

Spatio-Temporal Coordination and Conflict of Production-Living-Ecology Land Functions in the Beijing-Tianjin-Hebei Region, China

Assessment of multiple land use functions promotes both utilization efficiency of land and regional coordination. Different personal and public products and services are offered by various land use types, meaning their functionality varies. Lack of judgment on temporal trends, turning points, or consideration of multi-source indicators like the ecological and air quality index leads to uncertainties in urban multifunctionality evaluation and functional orientation. In this study, the production-living-ecology land use function index system and evaluation process was improved using an entropy weight, triangle model, and coupling coordination degree. The production-living-ecology land use function (PLELUF) is defined from land use multi-functions. The Beijing-Tianjin-Hebei urban agglomeration was the representative area. The model was applied to quantify land use functions and measure spatio-temporal coordination and conflict from 1990 to 2015. Results found that the production and living functions displayed an overall upward trend and the growth rate of production function is larger, doubling from 1990 to 1995, while living function increases steadily. Ecology function remained steady from 1990 to 2000 but increased afterward. Land use function stage became balanced in ecology-living-production after 2005. No function-balanced cities existed in 1990; nine function-balanced cities were found in 2015. The coupling coordination degree increased from a slight conflict to a high coordination. Land use multi-functionality was high in the north and low in the south in 2015; Beijing had the most significant multifunctionality. This study can aid land use zoning and sustainable land management.

Correlation analysis and threshold value research on the form and function indexes of an urban interconnected river system network

As urbanization has accelerated, the form of river and lake systems has changed greatly in cities, which has caused variations in the functioning of the interconnected river system network (IRSN). To quantitatively evaluate the influence of the urbanization process on IRSN, the form index system and function index system were established in this study. The form index system involved eight indexes, and the function index system included 18 indexes. We also used statistical methods to analyze the correlations between the form indexes and the function indexes of the IRSN. Multiple linear regression equations were established between the variations in the IRSN form indexes and the function indexes. Finally, we determined the threshold values of the IRSN form indexes that can meet Zhengzhou City's future development demands for water function. The threshold value for the drainage network density is between 0.32 and 0.33; the threshold value for the node connection rate is between 1.54 and 2; the threshold value for the degree of connectivity between river systems ranges from 0.55 to 0.77; and the threshold value for circuitry of the river ranges from 0.40 to 0.60. Validation shows that these values are reasonable.

Substation Design Optimization Research Based on PSO and Value Index Method

In this paper, an combined evaluation process to evaluate the value of substation was proposed. Firstly, a substation function index system was established with consideration of the function structure and features of substation. Secondly, the Analytic Hierarchy Process (AHP) and entropy method were separately used to calculate the subjective and objective weights of the function indexes. Thirdly, the sum of squares of deviations method and Particle Swarm Optimization (PSO) method were used to get the function indexes’ combined weights. At last, the evaluation model was formed by function index compared with the cost index. The substation design data were used to test the evaluation model, the results showed it was feasible.

System Target Damage Assessment Based on FAHP

It is found that the traditional BDA methods are not appropriate the system target BDA. A new method of the system target BDA is proposed in this paper. Firstly, based on Hierarchy Analysis Method (AHP), the system target function index system is set up. Secondly, the step of system target function damage assessment method is analyzed and proposed based on Fuzzy Analytic Hierarchy Process (FAHP). Finally, an example of air base damage assessment is given to verify the validity and availability of the proposed method.

Damage Evaluation Method for Integrated Electronic Information

Battle damage level classification and judgment rule are established in order to evaluate battle damage for integrated electronic information system. The function index system of integrated electronic information system is established based on its function hierarchy decomposition through analyzing its function requirements. Using the ideas of fuzzy comprehensive evaluation method and analytic hierarchy process, an evaluation method of battle damage assessment for integrated electronic information system is proposed based on the function index system. The correctness and validity of the proposed method is verified through a calculation example. The result of the example indicates that the damage level of integrated electronic information system can be achieved from the proposed method correctly.

Optimization on Excavation Design with VE Method

This paper obtains function index system of excavation by FAST method and introduces fuzzy comprehensive evaluation to estimate function index system. By analyzing function system of the excavation obtains the evaluation method for excavation design cost, proposing new evaluation standard for excavation design. At last establishing value engineering (VE) optimization model for excavation design, and put it into engineering practice to prove that the model is convenient and practical.

Evaluation on Excavation Design with VE Method

This paper obtains function index system of excavation by FAST method and introduces two-class fuzzy comprehensive evaluation to estimate function index system. By analyzing the excavation's life-cycle costs obtains the evaluation method for excavation design cost, proposing new evaluation standards for excavation design. At last establishing value engineering (VE) evaluated model for excavation design, and put it into engineering practice to prove that the model is convenient and practical, simple, fast, and accurate.