نتایج جستجو برای: local base with stratified structure
تعداد نتایج: 9947033 فیلتر نتایج به سال:
the main purpose of this study was to investigate of economic impacts of soleimanshah dam on rural development in regions that are under influence of irrigation and drainage network of dam. in this research quantitative-qualitative research method was used and information gathered with questionnaire, interview, and direct observation. statistical population of research in qualitative part consi...
one of the most important factors in study of project’s , is the study of environmental opportunities factors the permanent study of environmental opportunity factors . the study of permanent environmental changing and knowing golden threats’ cooperate with possible threats and at the result in structure forming and future skeleton of organization has a vital effects . the petrochemical industr...
a novel acrylic acid-functionalized fe3o4 magnetic nanoparticle with a core-shell structure was developed for utilization as a heterogeneous organosuperacid in chemical transformations. the structural, surface, and magnetic characteristics of the nanosized catalyst were investigated by various techniques such as transmission electron microscopy (tem), thermogravimetric analysis (tga), and ft-ir...
boron nitride semiconducting zigzag swcnt, $b_{cb}$$n_{cn}$$c_{1-cb-cn}$, as a potential candidate for making nanoelectronic devices was examined. in contrast to the previous dft calculations, wherein just one boron and nitrogen doping configuration have been considered, here for the average over all possible configurations, density of states (dos) was calculated in terms of boron and nitrogen ...
Many merging operators have been proposed to merge either flat or stratified knowledge bases. The result of merging by such an operator is a flat base (or a set of models of the merged base) irrespective of whether the original ones are flat or stratified. The drawback of obtaining a flat merged base is that information about more preferred knowledge (formulae) versus less preferred knowledge i...
Antarctic sea ice is a critical component of the climate system and vital habitat for Southern Ocean ecosystems. Understanding underlying physical processes improving prediction broad interest. Using model data, we investigate upper ocean predictability at interannual timescales in Weddell Sea region. We find that oceanic largely confined to Winter Water layer responds seasonal modifications wa...
today the image of a permanent skeletal space of cities affected by some forces or mechanisms is put in time with social-economic development and while imposes a new face and perspective to physical anatomy of cities, and prepares field to changes in content and social- economic structures of cities too. simultaneously with quitting villages in order to settle in cities by villagers, the phen...
For any stratified pseudomanifold X and any action of the unit circle S on X preserving the stratification and the local structure; the orbit space X/S is also a stratified pseudomanifold. For each perversity q in X the orbit map π : X → X/S induces a Gysin sequence relating the q-intersection cohomologies of X and X/S. The third term of this sequence can be given by means of a spectral sequenc...
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