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<article article-type="research-article" dtd-version="1.3" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xml:lang="ru"><front><journal-meta><journal-id journal-id-type="publisher-id">mireabulletin</journal-id><journal-title-group><journal-title xml:lang="ru">Russian Technological Journal</journal-title><trans-title-group xml:lang="en"><trans-title>Russian Technological Journal</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2782-3210</issn><issn pub-type="epub">2500-316X</issn><publisher><publisher-name>RTU MIREA</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.32362/2500-316X-2017-5-2-57-69</article-id><article-id custom-type="elpub" pub-id-type="custom">mireabulletin-57</article-id><article-categories><subj-group subj-group-type="heading"><subject>Research Article</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="ru"><subject>АНАЛИТИЧЕСКОЕ ПРИБОРОСТРОЕНИЕ И ТЕХНОЛОГИИ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>ANALYTICAL INSTRUMENT ENGINEERING AND TECHNOLOGY</subject></subj-group></article-categories><title-group><article-title>ПОДХОД К КООРДИНАЦИИ МАЛООБЪЕМНОГО ОБРАЗЦА ПРИ РЕАЛИЗАЦИИ ПОНДЕРОМОТОРНОГО МЕТОДА ОПРЕДЕЛЕНИЯ ЕГО МАГНИТНОЙ ВОСПРИИМЧИВОСТИ</article-title><trans-title-group xml:lang="en"><trans-title>AN APPROACH FOR CHOOSING POSITIONING OF SMALL VOLUME SAMPLE AT INSTANTIATION PONDEROMOTIVE FARADAY METHOD IN DETERMINING ITS MAGNETIC SUSCEPTIBILITY</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Сандуляк</surname><given-names>А. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Sandulyak</surname><given-names>A. A.</given-names></name></name-alternatives><email xlink:type="simple">noemail@neicon.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Сандуляк</surname><given-names>А. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Sandulyak</surname><given-names>A. V.</given-names></name></name-alternatives><email xlink:type="simple">noemail@neicon.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Полисмакова</surname><given-names>М. Н.</given-names></name><name name-style="western" xml:lang="en"><surname>Polismakova</surname><given-names>M. N.</given-names></name></name-alternatives><email xlink:type="simple">noemail@neicon.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Киселев</surname><given-names>Д. О.</given-names></name><name name-style="western" xml:lang="en"><surname>Kiselev</surname><given-names>D. O.</given-names></name></name-alternatives><email xlink:type="simple">noemail@neicon.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Сандуляк</surname><given-names>Д. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Sandulyak</surname><given-names>D. A.</given-names></name></name-alternatives><email xlink:type="simple">d.sandulyak@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Московский технологический университет</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Moscow Тechnological University</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2017</year></pub-date><pub-date pub-type="epub"><day>28</day><month>04</month><year>2017</year></pub-date><volume>5</volume><issue>2</issue><fpage>57</fpage><lpage>69</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Сандуляк А.А., Сандуляк А.В., Полисмакова М.Н., Киселев Д.О., Сандуляк Д.А., 2017</copyright-statement><copyright-year>2017</copyright-year><copyright-holder xml:lang="ru">Сандуляк А.А., Сандуляк А.В., Полисмакова М.Н., Киселев Д.О., Сандуляк Д.А.</copyright-holder><copyright-holder xml:lang="en">Sandulyak A.A., Sandulyak A.V., Polismakova M.N., Kiselev D.O., Sandulyak D.A.</copyright-holder><license xml:lang="ru" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>Данная работа распространяется под лицензией Creative Commons Attribution 4.0.</license-p></license><license xml:lang="en" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>This work is licensed under a Creative Commons Attribution 4.0 License.</license-p></license></permissions><self-uri xlink:href="https://www.rtj-mirea.ru/jour/article/view/57">https://www.rtj-mirea.ru/jour/article/view/57</self-uri><abstract><p>В настоящей работе рассматривается малоизученный вопрос идентификации рабочей зоны (зоны для координации исследуемых образцов малых объемов) в весах Фарадея по определению магнитной восприимчивости образцов пондеромоторным методом на основании специально получаемой координатной характеристики индукции поля между полюсными наконечниками указанных весов. Показано, что такая идентификация может быть вполне результативной в том случае, когда данная характеристика, обычно нелинейная и не поддающаяся желаемой, даже частичной, линейной аппроксимации, имеет перегиб. Тогда появляется возможность объективной линейной аппроксимации определенного участка этой характеристики, т.е. констатации стабильных значений градиента индукции в соответствии с принятым условием позиционирования образца. Становится также возможной иллюстрация экстремального вида характеристики градиента индукции; в окрестности экстремума значения градиента относительно стабильны.</p></abstract><trans-abstract xml:lang="en"><p>The paper observes matter about identification of operating area at Faraday balance (area for positioning of test specimens with a small volume). This matter is given coverage to reference deficiently and it’s necessary to evaluate magnetic susceptibility values of specimens - based on purpose obtained coordinate characteristics of magnetic field induction between pole pieces of such balance. The paper shows that such identification may be quite effective when given characteristic (usually it is non-linear and doesn’t yield to desired linear even local approximation) is curly, i.e. has an inflection. It may possible making a linear approximation of rather shortly characteristic’s response region, i.e. establish a stable value induction gradient (according to accepted criterion sample poisoning). It also may possible getting visualized extremum view of gradient induction characteristic (in the vicinity of its gradient value are relatively stable).</p></trans-abstract><kwd-group xml:lang="ru"><kwd>весы Фарадея</kwd><kwd>магнитная восприимчивость</kwd><kwd>зона размещения образца</kwd><kwd>характеристики напряженности (индукции)</kwd><kwd>экстремум градиента</kwd></kwd-group><kwd-group xml:lang="en"><kwd>Faraday balance</kwd><kwd>magnetic susceptibility</kwd><kwd>specimen’s positioning area</kwd><kwd>field density (induction) characteristic</kwd><kwd>gradient extremum</kwd></kwd-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Nandy K., Chaudhuri S., Ganguly R. [et al.] Analytical model for the magnetophoretic capture of magnetic microspheres in microfluidic devices // J. Magnetism and Magnetic Materials. 2008. V. 320. Is. 7. 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