نتایج جستجو برای: pi regular
تعداد نتایج: 165148 فیلتر نتایج به سال:
Geometry is one of the primary and most direct indicators of aromaticity and antiaromaticity: a regular structure with delocalized double bonds (e.g., benzene) is symptomatic of aromaticity, whereas a distorted geometry with localized double bonds (e.g., 1,3-cyclobutadiene) is characteristic of antiaromaticity. Here, we present a molecular-orbital (MO) model of aromaticity that explains, in ter...
This study proposed an intelligent algorithm based on digital image processing and character recognition to address the current situation in which National Medical Products Administration promulgated relevant regulations complete prohibition of use mercury sphygmomanometers 2020 currently widely used electronic need undergo regular verification quality testing. The made it possible automaticall...
safflower is one of the oldest cultivated plants and oilseed as a native iran could have in the development of oilseeds cultivation. to evaluate the morphological characteristics of safflower (carthamus tinctorius l) an experiment was conducted as a completely randomized design. the figures include 1- pi 23755 2-pi 239041 3- pi 250202 4- pi 250532 5- pi 25268 6- pi 253515 7- pi 253541 8- pi 253...
موضوع پایداری در میکروشبکه ها همچون سیستم های قدرت سنّتی، مولفه مهمی برای مدیریت انرژی و برنامه ریزی می باشد. پایداری ولتاژ و فرکانس از مهمترین مواردی است که اخیراً در زمینه میکروشبکه ها مطالعه شده است. هدف از انجام این پایان نامه، طراحی و مدلسازی عناصر و کنترلرها و ارائه روش های جدیدی برای کنترل ولتاژ در یک میکروشبکه هیبرید ac/dc و در شرایط وقوع اغتشاشات مختلف می باشد. همچنین توانایی این روش ها ...
Using psi(2S)-->pi;{+}pi;{-}J/psi, J/psi-->gammaeta;{'} events acquired with the CLEO-c detector at the CESR e;{+}e;{-} collider, we make the first observations of the decays eta;{'}-->pi;{+}pi;{-}pi;{0} and eta;{'}-->pi;{+}pi;{-}e;{+}e;{-}, measuring absolute branching fractions (37_{-9};{+11}+/-4)x10;{-4} and (25_{-9};{+12}+/-5)x10;{-4}, respectively. For eta;{'}-->pi;{+}pi;{-}pi;{0}, this re...
Abstract We say that a triangle T tiles polygon A , if can be dissected into finitely many nonoverlapping triangles similar to . show $$N>42$$ N > 42 then there are at most three nonsimilar such the angles of rational multiples $$\pi $$ π<...
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