نتایج جستجو برای: semi intensively
تعداد نتایج: 152593 فیلتر نتایج به سال:
Recognizing 3-colorable graphs is one of the most famous NP-complete problems [Garey, Johnson, and Stockmeyer STOC’74]. The problem of coloring 3-colorable graphs in polynomial time with as few colors as possible has been intensively studied: O(n1/2) colors [Wigderson STOC’82], Õ(n2/5) colors [Blum STOC’89], Õ(n3/8) colors [Blum FOCS’90], O(n1/4) colors [Karger, Motwani, Sudan FOCS’94], Õ(n3/14...
The challenging complexity of biological structures has led to the development of several methods for quantitative analyses of form. Bones are shaped by the interaction of historical (phylogenetic), structural, and functional constrains. Consequently, bone shape has been investigated intensively in an evolutionary context. Geometric morphometric approaches allow the description of the shape of ...
Remote sensing imagery is being used intensively to estimate the biochemical content of vegetation (e.g., chlorophyll, nitrogen, and lignin) at the leaf level. As a result of our need for vegetation biochemical information and our increasing ability to obtain canopy spectral data, a few techniques have been explored to scale leaf-level biochemical content to the canopy level for forests and cro...
Abstract Many organisms respond to anthropogenic environmental change through shifts in their phenology. In plants, flowering is largely driven by temperature, and therefore affected climate change. However, on smaller scales climatic conditions are also influenced other factors, including habitat structure. A group of plants with a particularly distinct phenology the understory herbs temperate...
Poultry vaccines are intensively used to prevent and control infectious poultry diseases. The aim of vaccination is to reduce the occurrence of clinical disease. Several factors affect vaccination programmers which emphasize the crucial responsibility of person designing the vaccination program. There are limited studies evaluating the knowledge and attitude of veterinarians toward veterinary v...
the methods which are used to analyze microstrip antennas, are divited into three categories: empirical methods, semi-empirical methods and full-wave analysis. empirical and semi-empirical methods are generally based on some fundamental simplifying assumptions about quality of surface current distribution and substrate thickness. thses simplificatioms cause low accuracy in field evaluation. ful...
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