The minimum weighted dominating set (MWDS) problem is one of the classic NP-hard optimization problems in graph theory with applications in many fields such as wireless communication networks. MWDS in general graphs has been showed not to have polynomial-time constant-approximation if <InlineEquation ID="IEq1"> <EquationSource...</equationsource></inlineequation>

In the Minimum k-Path Connected Vertex Cover Problem (MkPCVCP), we are given a connected graph G and an integer k ≥ 2, and are required to find a subset C of vertices with minimum cardinality such that each path with length k − 1 has a vertex in C, and moreover, the induced subgraph G[C]...

This paper analyzes why no foreign direct investment (FDI) has entered basic telecom services in China despite relaxed government policies after the World Trade Organization (WTO) accession in 2001. A new indicator of barriers to FDI incorporating the policy and non-policy impediments has been...

This paper stated the background under which beautiful countryside construction was proposed; reviewed the new countryside construction profile of Hefei City before beautiful countryside construction was proposed; analyzed the practices of beautiful countryside construction of Hefei City from the...

Urban earthquake disaster prevention is regarded as an integrated systematic engineering. Urban earthquake disaster prevention system is made up of all the earthquake disaster prevention activities. The concept and composition of urban earthquake disaster prevention system periphery were...

Excessive nitrogen loads and subsequent eutrophication risk have led to a series of critical water quality problems in Chinese watersheds. To address this issue, a modeling approach is useful for quantifying nitrogen sources, assessing source apportionment, and guiding management responses. In...

This research investigates whether and how board independence influences corporate investment decisions in a Seemingly Unrelated Regression (SUR) framework, where the capital investment and the research and development (R&D) investment are examined simultaneously. We argue that the free cash...

This paper contributes to the literature on the role of foreign direct investment and vertical specialisation in China’s growth trajectory. Globalisation of the world economy, together with well-developed physical infrastructure, and falling costs of transport and communications, has led to a...

Optimal power flow (OPF) objective functions involve minimization of the total fuel costs of generating units, minimization of atmospheric pollutant emissions, minimization of active power losses and minimization of voltage deviations. In this paper, a fuzzy multi-objective OPF model is...