Drezner and Wesolowsky (1991) studied multi-relocation in time horizon while maximum expected cost lows down to minimum.
In the single relocation, relocation is allowed in time horizon just once and in multiple relocations, new facilities are allowed to locate and change them more than once during the time horizon (Emamizadeh and Farahani 1997a, 1997b).
The relocation method involves analyses and geostrophic velocity computations to allow the relocation of stations in time and space to a particular analysis time.
In general, dynamic location problems can be divided into several types based on different criteria such as cause of change, the number of relocations, the number of relocating facilities, relocation time and the time horizon.
It is therefore necessary to set an upper time threshold Tmax to warrant homogeneous movements (i.e. no marked drift or diffusion changes) between successive relocations: track segments that are longer in time are dismissed from UD computation.
In our hypocenter relocation, travel time differences between event pairs, i.e., DD travel times, were used as well as absolute times.
Hence the mDSM, considering the single-period DSM-approach for several points in time plus all resulting relocations between time periods, has been solved using both CPLEX and VNS (as described in Section 3.2).
Even with the slowing economy, no one expects to see any real downturn in relocations any time soon.
Hereafter, the time t ∈ [0, Ti] will refer to the activity time elapsed from the previous relocation (resting time is ignored; see rationale in [15]).
David Cameron announced last week that 1,000 Syrian refugees will be settled in the UK in time for Christmas through the government's vulnerable persons relocation scheme.
