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With the development of Chinese economy and society, energy security and environmental pollution problems in China have become increasingly prominent, developing electric vehicles rapidly has become a national strategic choice. A perfect charging facilities system is an important guarantee for the rapid development of electric vehicles, and charging facilities planning is an important part of the...
E-business based maintenance, repair and overhaul (E-MRO) is a new MRO service mode. Although in real world there are a number of E-MRO prototype systems, few comprehensive studies have been conducted on this topic. Motivated by the challenges of making optimal E-MRO service planning, simultaneously considering the capacity constraints of MRO service providers and the maintenance constraints of equipment...
Positron emission tomography/computed tomography (PET/CT) images have been used in the radiotherapy treatment planning, especially in the delineations of biological target volumes (BTVs) of tumors. However, it is not possible to accurately and precisely discriminate between tumors and adjacent normal tissues in PET/CT images if the normal tissues with a high PET standard uptake value (SUV) such as...
In this paper, we consider the external visibility coverage for polyhedra under the orthographic viewing model. The problem is to compute whether the whole boundary of a polyhedron is visible from a finite set of view directions, and if so, how to compute a minimal set of such view directions. A global visibility map based method is developed to calculate an optimal or near-optimal solution using...
Past research has studied a variety of variables. However, less research is found to measure e-commerce (EC) development in terms of business processes. Building upon the TOE (Technology-Organization-Environment) framework, a research model for assessing EC development was developed, incorporating eight factors. A series of propositions were then developed. 156 cross-sectional samples in 16 industries,...
A sum of the cost of active power losses and reactive power generating equipment is used as the objective function of optimal reactive power planning (ORPP) problem. The theory of decomposition and coordination is employed to decompose the problem into three sub-problems according to load level. Every sub-problem is a problem of reactive power optimization, which is solved by a hybrid approach of...
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