A two-stage optimization method is presented by employing the evolutionary structural optimization (ESO) and ant colony optimization (ACO), which is called ESO-ACO method. To implement ESO-ACO, size optimization is performed using ESO, first. Then, the outcomes of ESO are employed to enhance ACO. In optimization process, the weight of double layer grid is minimized under various constraints whi...

in the conditions in which terrorist attacks on facilities and civilian places increase more and more attention to design of structures against impact loads of explosion is more important and needs special considerations. study of nature of blast loads and methods of applying it on the structure is one of the important problems. explosion is a sudden and rapid release of a great amount of energ...

Modern text linguistics pays serious attention to the significant structural elements of the text, which carry special knowledge. Such structural elements include the title. In this article, the title is considered as a linguistic and cognitive characteristic and a spatially fixed structural element of the text – «frame», which is located around/before/behind the text, focusing on the importanc...

During their service life, marine pipelines continually accumulate damage as a result of the action of various environmental forces. Clearly, the development of robust techniques for early damage detection is very important to avoid the possible occurrence of a disastrous structural failure. Most of vibration-based damage detection methods require the modal properties that are obtained from mea...

in recent year, the evolutionary structural optimization (eso) method, has been applied as an effective tool for structures design. the concept of eso method is to use the finite element  results in each iteration of process and removal of inefficient material based on these results. in this method there are several experimental parameters such as rejection rate and evolutionary rate that are e...

among the most common type of literary, aesthetic and lyric literature by having the elements and themesimagery provides a good platform to analyze the structure of the word external and internal relationships because relationships based on the form and structure of speech is considered so by what is in the form of content main purpose of the speaker is the approach to the structure of the styl...