نتایج جستجو برای: structure parameter
تعداد نتایج: 1753832 فیلتر نتایج به سال:
The Hellenic Naval Academy (HNA) reports the latest results from a medium-range, near-maritime, free-space laser-communications-testing facility, between lighthouse of Psitalia Island and academy’s laboratory building. FSO link is established within premises Piraeus port, with path length 2958 m an average altitude 35 m, mainly above water. Recently, facility was upgraded through addition BLS45...
in chapter one we will describe definitions and preliminary results to provide the global context of our own results to be presented in detail in the subsequent chapters in chapter two we consider degree-one maps of the circle and we study their rotation set. our main result in this chapter says that if the map is topologically mixing then its rotation interval is nontrivial (that is, not reduc...
in this thesis our aim is to construct vector field in r3 for which the corresponding one-dimensional maps have certain discontinuities. two kinds of vector fields are considered, the first the lorenz vector field, and the second originally introced here. the latter have chaotic behavior and motivate a class of one-parameter families of maps which have positive lyapunov exponents for an open in...
This paper presents an experimental study the influence of wave parameter on the damage of reshaping seawall, model tests have been performed in several water level conditions. The experiments of physical modeling of this research have been done in the flume of the Soil Conservation and Watershed Management Research Institute (SCWMRI). The waves applied to the structure model are irregular and ...
Jet propellant 10, JP-10, is the latest synthetic product in the jet propellant series with several reports on the chemical and the physical properties. This synthetic single molecular fuel with suitable properties similar to Jet propellant 4, has ability to operate on longer distance. This difference leads to more attention at aerospace industries.. According to literatures, they are not m...
mesoporous mgo microstructures were synthesized using magnesium acetate tetrahydrate, ammonium oxalate monohydrate and pluronic f127 via heating at 40 °c for 24 h and subsequent calcination. the mesoporous structure of magnesium oxide with the specific surface area of 47m2/g, pore volume 0.30 cm3/g and the average pore size 24 nm is produced. according to xrd stu...
the glass transition temperature (tg) and the melting temperature (tm) of gelatin at water contents between 7 and 14% were measured using differential scanning calorimetry. the plasticisation of the polymer by water led to a decrease in tg and tm. the tg of partially crystalline gelatin was higher than that of the amorphous one obtained by quenching from the melt. the enthalpy relaxation occur...
identification of damping parameter is usually more complicated and unreliable comparing to mass or stiffness identification in structural dynamics. there are many factors such as intermolecular friction, coulomb friction and viscous damping affecting the damping mechanisms in a structure. therefore it is difficult, and in some cases impossible, to describe the details of damping mechanisms by ...
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