the moon is the force that causes the tide to come in and out.
the moon is the force that causes the tide to come in and out.
what force causes the tide to come in and out?
the moon
a gravitational search algorithm is based on the law of gravity and the notion of mass interactions. the gsa algorithm uses the theory of newtonian physics and its searcher agents are the collection of masses. in gsa, there is an isolated system of masses. using the gravitational force, every mass in the system can see the situation of other masses. the gravitational force is therefore a way of transferring information between different masses (rashedi, nezamabadi-pour and saryazdi 2009). in gsa, agents are considered as objects and their performance is measured by their masses. all these objects attract each other by a gravity force, and this force causes movement of all objects towards the objects with heavier masses. heavier masses correspond to better solutions of the problem. the position of the agent corresponds to a solution of the problem, and its mass is determined using a fitness function. by lapse of time, masses are attracted by the heaviest mass, which would ideally present an optimum solution in the search space. the gsa could be considered as an isolated system of masses. it is like a small artificial world of masses obeying the newtonian laws of gravitation and motion. a multi-objective variant of gsa, called mogsa, was first proposed by hassanzadeh et al. in 2010.
list of metaphor-based metaheuristics
"strain gauges"a strain gauge is a device that measures change in electrical resistance when a force is applied. a typical strain gauge is made up of very fine wire, or foil, set up in a grid pattern in a way that produces a linear change in resistance when strain is applied along one axis. tension force causes the strain gauge to get thinner and longer, increasing the resistance.  compression force causes the strain gauge to get thicker and shorter, decreasing resistance. the strain gauge is bonded to a thin backing (carrier), which is attached directly to the load cell enabling the strain of the load cell to be experienced by the strain gauge.
load cell