With the urbanization development in China, natural ecological environment and ecological environments in rural areas have been affected. Therefore, the characteristics and…
Abstract
With the urbanization development in China, natural ecological environment and ecological environments in rural areas have been affected. Therefore, the characteristics and classification of rural greenway were analyzed on the basis of eco economic model theory, the resources of ecological, cultural, recreational and industrial greenway planning were evaluated, and the structure characteristics of rural greenway network are analyzed. A mathematical model of space superposition analysis is constructed. Taking SunYea town of Feixian county in Shandong as the object, starting from the green road network space, greenway system, service facilities, transfer system and identification system and other aspects, the construction of the rural greenway was carefully planned. Practice has proved that rural greenway planning research has improved the scientific nature of the allocation of resources, and has a certain exemplary role for the construction of rural greenway network in similar areas.
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Wensheng Lin, Guangbin Wang, Yan Ning, Qiuwen Ma and Shuyuan Dai
Megaproject performance measurement (MPM) has received great attention in the project management community, but it primarily focused on the design of performance measures or…
Abstract
Purpose
Megaproject performance measurement (MPM) has received great attention in the project management community, but it primarily focused on the design of performance measures or frameworks. Yet, whether MPM utilization can improve megaproject performance and how project actors use MPM to improve megaproject performance is less well understood. This study aims to investigate whether and how the use of MPM can contribute to better megaproject performance.
Design/methodology/approach
Through the lens of the lever of control, this study conceptualizes MPM utilization as diagnostic use and interactive use. A holistic research model and related hypotheses integrating MPM use, project complexity and megaproject performance were established. The model was validated using a partial square-structural equation modeling method.
Findings
Based on 214-megaproject data collected through a questionnaire survey in China, the results show positive effects of diagnostic use and interactive use on megaproject performance. Both, however, have substitutional interaction effects. The moderating results suggest that the higher project complexity weakens the positive effects of MPM utilization on megaproject performance.
Originality/value
This study advances megaprojects performance measurement and management literature by validating the value of MPM utilization on performance. It also presents practical implications for project managers to improve performance by appropriate MPM utilization.
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Lei Wu, Xue Tian, Hongyan Wang, Qi Liu and Wensheng Xiao
As a kind of NP-hard combinatorial optimization problem, pipe routing design (PRD) is applied widely in modern industries. In the offshore oil and gas industry, a semi-submersible…
Abstract
Purpose
As a kind of NP-hard combinatorial optimization problem, pipe routing design (PRD) is applied widely in modern industries. In the offshore oil and gas industry, a semi-submersible production platform is an important equipment for oil exploitation and production. PRD is one of the most key parts of the design of semi-submersible platform. This study aims to present an improved ant colony algorithm (IACO) to address PRD for the oil and gas treatment system when designing a semi-submersible production platform.
Design/methodology/approach
First, to simplify PRD problem, a novel mathematical model is built according to real constraints and rules. Then, IACO, which combines modified heuristic function, mutation mechanism and dynamical parameter mechanism, is introduced.
Findings
Based on a set of specific instances, experiments are carried out, and the experimental results show that the performance of IACO is better than that of two variants of ACO, especially in terms of the convergence speed and swarm diversity. Finally, IACO is used to solve PRD for the oil and gas treatment system of semi-submersible production platform. The simulation results, which include nine pipe paths, demonstrate the practicality and high-efficiency of IACO.
Originality/value
The main contribution of this study is the development of method for solving PRD of a semi-submersible production platform based on the novel mathematical model and the proposed IACO.