Understanding and controlling spreading dynamics in networks presupposes the identification of those influential nodes that will trigger an efficient information diffusion. It has been shown that the best spreaders are the ones located in the core of the network – as produced by the k-core decomposition. In this paper we further refine the set of the most influential nodes, showing that the nod...

We consider semidefinite programming (SDP) formulations of certain truss topology optimization problems, where a lower bound is imposed on the fundamental frequency of vibration of the truss structure. These SDP formulations were introduced in: [M. Ohsaki, K. Fujisawa, N. Katoh and Y. Kanno, Semi-definite programming for topology optimization of trusses under multiple eigenvalue constraints, Co...

In order to improve the progressive collapse resistance of an RC frame structure with L-shaped plane under local component failure, X-tension reinforcement and steel trusses are applied design. this paper, finite element software MIDAS Gen v2.1 is used establish 6-story X-type tension strengthening a truss at top. Nonlinear dynamic analysis comparison two structures after structural failure car...

Structural health monitoring problems are studied numerically with the time reversal method (TR). The dynamic output of structure is applied, reversed, as an external loading and its propagation within deformable medium followed backwards in time. Unknown sources or damages can be discovered by means this method, focused reversed signal. theoretically justified time-reversibility wave equation....

A new research perspective is proposed to optimize the topology of truss structure by force cone method, which involves drawing rules and growth rules. Through comparison with mature variable density optimization effectiveness method verified. This kind simple easy understand (no need master complex structural design theory). Besides, it time-saving in finite element calculations, can obtain an...

a 15-landmark morphometric truss network system was used to investigate the hypothesis of population fragmentation of shad fish alosa braschnicowi borodin, 1904 along the southern caspian sea. a total of 181 a. braschnicowi specimens were caught from six localities, respectively from the west to the east including; astara, rezvanshahr, anzali, tonekabon, sari and miankale. principal component a...

• Beam- and surface-based lattice topologies are all suitable for bone implant design. In topologies, specific area stiffness can be decoupled. Surface-based more efficient at promoting growth than beam-based topologies. Stochastic spinodal shell require the smallest safety factor. Large fractures often porous implants complete healing. this work, we numerically investigate suitability of three...

Abstract Judging from the development status of most super-high-rise building industries in China, “outer frame + core tube” is basically adopted. The appearance this tube structure design concept puts forward higher requirements for construction safety main structure. Combined with practical engineering projects, we analyze risks and countermeasures outer column super high-rise steel structure...

The present paper is devoted to the numerical analysis and experimental tests of compressed bars with built-up cross section which are commonly used as a top chord roof trusses. significant impact on carrying capacity for that kind elements in case out-of-plane buckling appropriate choice battens provide interaction between separate members. Linear results nonlinear static results, material geo...

Several metaheuristic algorithms have been implemented to solve global optimization issues. Nevertheless, these approaches require more enhancement strike a suitable harmony between exploration and exploitation. Consequently, this paper proposes improving the arithmetic algorithm (AOA) engineering issues based on cuckoo search called AOACS. The developed approach uses operators improve ability ...