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Äîö. ä-ð . Êðàñèìèð Äèìèòðîâ Öâÿòêîâ
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 ñáîðíèê
| Ñòàòèè
| Kr. D. Tsvyatkov, New formulas for three-point bounds on the effective conductivity of multi-phase symmetric cell materials, Proceeding of Int. Sci. Conference MATTEX 2020, Shumen, Bulgaria, v. 1, Section Mathematics and Natural Sciences, pp. 35-42. |
18.06.2021 |
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Äîö. ä-ð . Êðàñèìèð Äèìèòðîâ Öâÿòêîâ
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 ñáîðíèê
| Ñòàòèè
| Êð. Öâÿòêîâ, Åäíî åëåìåíòàðíî ïîäîáðåíèå íà êëàñòåðíèòå ãðàíèöè íà åôåêòèâíàòà ïðîâîäèìîñò íà ðàçðåäåíè äèñïåðñèè, Ñáîðíèê íàó÷íè òðóäîâå, ïîñâåòåí íà 100 ã. îò ðîæäåíèåòî íà Äæ. Àòàíàñîâ, Øóìåí, 4-5.12., ÓÈ “Åï. Ê. Ïðåñëàâñêè”, ò. I, Øóìåí, 2004, 68-77, ISBN: 954-577-257-3 |
20.02.2020 |
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Äîö. ä-ð . Êðàñèìèð Äèìèòðîâ Öâÿòêîâ
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 ñáîðíèê
| Ñòàòèè
| Êð. Öâÿòêîâ, Âëèÿíèå íà êîíòàêòíèòå ïîâúðõíèíè âúðõó åôåêòèâíàòà ïðîâîäèìîñò íà ñëó÷àéíè äèñïåðñèè, Ñáîðíèê îò íàó÷íè òðóäîâå íà Íàöèîíàëíà êîíôåðåíöèÿ ñ ìåæäóíàðîäíî ó÷àñòèå “40 ãîäèíè Øóìåíñêè óíèâåðñèòåò 1971-2011”, 2011, 30-35, ISBN: 978-954-603-8 |
20.02.2020 |
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Äîö. ä-ð . Êðàñèìèð Äèìèòðîâ Öâÿòêîâ
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 ñáîðíèê
| Ñòàòèè
| Êð. Öâÿòêîâ, Âúðõó åôåêòèâíàòà ïðîâîäèìîñò íà ìíîãîôàçíè äèñïåðñèè, Ñáîðíèê íàó÷íè òðóäîâå îò íàó÷íà êîíôåðåíöèÿ "ÌÀÒÒÅÕ 2012" - Òîì 1, ÓÈ “Åï. Ê. Ïðåñëàâñêè”, 2012, c. 85-90, ISSN: 1314-3921 |
20.02.2020 |
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Äîö. ä-ð . Êðàñèìèð Äèìèòðîâ Öâÿòêîâ
|
 ñáîðíèê
| Ñòàòèè
| Êð. Öâÿòêîâ, Âàðèàöèîííè ãðàíèöè è îöåíêè çà åôåêòèâíàòà äèåëåêòðè÷åñêà ïðîíèöàåìîñò íà ìíîãîôàçíè äèñïåðñèè îò õîìîãåííè åëèïñîèäàëíè âêëþ÷âàíèÿ, Ñáîðíèê íàó÷íè òðóäîâå îò íàó÷íà êîíôåðåíöèÿ "ÌÀÒÒÅÕ 2014" - Òîì 1, ÓÈ “Åï. Ê. Ïðåñëàâñêè”, 2014, c. 76-83, ISSN: 1314-3921 |
20.02.2020 |
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Äîö. ä-ð . Êðàñèìèð Äèìèòðîâ Öâÿòêîâ
|
 ñáîðíèê
| Ñòàòèè
| Êð. Öâÿòêîâ, Òðèòî÷êîâè êîðåëàöèîííè àïðîêñèìàöèè çà åôåêòèâíàòà ïðîâîäèìîñò íà ñëó÷àéíà ñðåäà, Ñáîðíèê íàó÷íè òðóäîâå îò íàó÷íà êîíôåðåíöèÿ "ÌÀÒÒÅÕ 2016" - Òîì 1, ÓÈ “Åï. Ê. Ïðåñëàâñêè”, 2016, c. 110-117, ISSN: 1314-3921
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20.02.2020 |
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Äîö. ä-ð . Êðàñèìèð Äèìèòðîâ Öâÿòêîâ
|
 ãîäèøíèê
| Ñòàòèè
| Êð. Ä. Öâÿòêîâ, Âúðõó åôåêòèâíèÿ îáåìåí ìîäóë íà ìíîãîôàçíè äèñîïåðñèè, Ãîäèøíèê íà ØÓ „Åïèñêîï Ê. Ïðåñëàâñêè”, Ôàêóëòåò ïî ìàòåìàòèêà è èíôîðìàòèêà, òîì ÕV²II Ñ, 2017, ñòð. 25-43, ISSN 1311 – 834X |
20.02.2020 |
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Äîö. ä-ð . Êðàñèìèð Äèìèòðîâ Öâÿòêîâ
|
 ñáîðíèê
| Ñòàòèè
| Öâÿòêîâ Êð., Âúðõó ÷åòèðèòî÷êîâèòå ãðàíèöè çà åôåêòèâíàòà ïðîâîäèìîñò íà ìíîãîôàçíè äèñïåðñèè, Ñáîðíèê íàó÷íè òðóäîâå îò íàó÷íà êîíôåðåíöèÿ "ÌÀÒÒÅÕ 2018" - Òîì 1, ÓÈ “Åï. Ê. Ïðåñëàâñêè”, 2018, c. 143-150, ISSN: 1314-3921 |
20.02.2020 |
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Äîö. ä-ð . Êðàñèìèð Äèìèòðîâ Öâÿòêîâ
|
Äðóãè
| Ó÷åáíè ïîìàãàëà
| Êð. Ä. Öâÿòêîâ, Äèôåðåíöèàëíî ñìÿòàíå íà ôóíêöèè íà íÿêîëêî ïðîìåíëèâè, Åëåêòðîíåí ìîäóë â pdf ôîðìàò, Öåíòúð çà äèñòàíöèîííî îáó÷åíèå, Øóìåíñêè Óíèâåðñèòåò "Åïèñêîï Êîíñòàíòèí Ïðåñëàâñêè ", Øóìåí, 2014, 99 ñòð.,ISBN: 978-954-577-927-5 |
20.02.2020 |
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Äîö. ä-ð . Êðàñèìèð Äèìèòðîâ Öâÿòêîâ
|
 ñáîðíèê
| Äîêëàäè
| Kr. D. Tsvyatkov, On the effective conductivity of multi-phase dispersions, Íàó÷íà êîíôåðåíöèÿ ñ ìåæäóíàðîäíî ó÷àñòèå "ÌÀÒÒÅÕ 2012", Øóìåí, 22-24 íîåìâðè 2012 ã. |
06.11.2013 |
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Äîö. ä-ð . Êðàñèìèð Äèìèòðîâ Öâÿòêîâ
|
 ñáîðíèê
| Ñòàòèè
| K. Markov, Kr. Zvyatkov, On the nonlinear conductivity of a random suspencion, Proc. 5th Bulg. Congress on Mechanics (Varna, 1985), Publ. House of the Bulg. Acad. Sci.,Sofia, Vol. 3, 1985, 48-53 |
06.11.2013 |
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Äîö. ä-ð . Êðàñèìèð Äèìèòðîâ Öâÿòêîâ
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 ñáîðíèê
| Ñòàòèè
| S. Slavova, Kr. Tsvyatkov, Spectral mapping theorems - applications to some spectral properties of linear transformers, Proc. 3th Int. Conference on complex analysis andapplications (Varna, 1985), Publ. House of the Bulg. Acad. Sci., Sofia, 1986, 623-634 |
06.11.2013 |
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Äîö. ä-ð . Êðàñèìèð Äèìèòðîâ Öâÿòêîâ
|
 ñáîðíèê
| Ñòàòèè
| Kr. Zvyatkov, On the effective properties of polydisperse composite materials, Proc. Int.Youth Scool “Application of machanics in robotics and new materials”, (Sunny Beach,1988), 322-326 |
06.11.2013 |
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Äîö. ä-ð . Êðàñèìèð Äèìèòðîâ Öâÿòêîâ
|
 íàó÷íî ñïèñàíèå
| Ñòàòèè
| K. Markov, Kr. Zvyatkov, New c^2-bounds on the effective properties of random dispersions of spheres, Proc. 6th Bulg. Congress on Mechanics (Varna, 1989), Publ. House ofthe Bulg. Acad. Sci., Sofia, Vol. 2, 1990, 313-316 |
06.11.2013 |
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Äîö. ä-ð . Êðàñèìèð Äèìèòðîâ Öâÿòêîâ
|
 ñáîðíèê
| Ñòàòèè
| Êð. Öâÿòêîâ, Âúðõó åôåêòèâíèòå ñâîéñòâà íà åäíà ñëó÷àéíà êîìïîçèòíà ñðåäà, Äîêëàäè íà øåñòè íàöèîíàëåí êîíãðåñ ïî òåîðåòè÷íà è ïðèëîæíà ìåõàíèêà, (Âàðíà,1989), Èçäàòåëñòâî íà ÁÀÍ, Êíèãà 2, 1990, 240-243 |
06.11.2013 |
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Äîö. ä-ð . Êðàñèìèð Äèìèòðîâ Öâÿòêîâ
|
 íàó÷íî ñïèñàíèå
| Ñòàòèè
| K. Markov, Kr. Zvyatkov, On the optimal third-order bounds on the effective conductivity of random dispersions of spheres, Journal of Theoretical and Applied Mechanics, Bulg.Acad. Sci., 22(3), 1991, 107-116 |
06.11.2013 |
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Äîö. ä-ð . Êðàñèìèð Äèìèòðîâ Öâÿòêîâ
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Ñ èìïàêò ôàêòîð
| Ñòàòèè
| K. Markov, Kr. Zvyatkov, Optimal third-order bounds on the effective properties of some composite media, and related problems, Advances in Mechanics (Warsaw), 14(4),1991, 3-46 |
06.11.2013 |
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Äîö. ä-ð . Êðàñèìèð Äèìèòðîâ Öâÿòêîâ
|
 ñáîðíèê
| Ñòàòèè
| K. Markov, Kr. Zvyatkov, Functional series and Hashin-Shtrikman type bounds on the effective properties of random media, In: Recent Advances in Mathematical Modelling ofComposite Materials, K. Z. Markov., ed., World Sci., 1994, 59-106 |
06.11.2013 |
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Äîö. ä-ð . Êðàñèìèð Äèìèòðîâ Öâÿòêîâ
|
 ñáîðíèê
| Ñòàòèè
| Kr. Zvyatkov, Variational principles and the c^2-formula for the effective conductivity of a random dispersion, Proc. 8th Int. Symposium “Continuum Models and DiscreteSystems" (Varna,1995), K.Z. Markov, ed., World Sci., 1996, 324-331 |
06.11.2013 |
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Äîö. ä-ð . Êðàñèìèð Äèìèòðîâ Öâÿòêîâ
|
Äðóãè
| Äèñåðòàöèè
| Êð. Ä. Öâÿòêîâ, Âúðõó ìåòîäà íà ôóíêöèîíàëíèòå ðåäîâå çà îöåíêè íà ñâîéñòâàòà íà ñðåäè ñúñ ñëó÷àéíà ñòðóêòóðà, Ñîôèÿ, 1993, 193 ñòð. |
06.11.2013 |
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Äîö. ä-ð . Êðàñèìèð Äèìèòðîâ Öâÿòêîâ
|
 íàó÷íî ñïèñàíèå
| Ñòàòèè
| K. Markov, Kr. Zvyatkov, On the bounds for the effective properties of random suspensions of spheres, Comptes rendus de l' Academie bulgare des Sciences,40(3), 1987, 17-20 |
10.12.2012 |
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Äîö. ä-ð . Êðàñèìèð Äèìèòðîâ Öâÿòêîâ
|
 íàó÷íî ñïèñàíèå
| Ñòàòèè
| K. Markov, Kr. Zvyatkov, On the effective behaviour of a nonlinear dispersion of spheres, Annuaire de l'Universite de Sofia, Faculte de Mathematiques etInformatique, Livre 2: Mecanique, 82(1988), 179-192 |
10.12.2012 |
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Äîö. ä-ð . Êðàñèìèð Äèìèòðîâ Öâÿòêîâ
|
 íàó÷íî ñïèñàíèå
| Ñòàòèè
| K. Markov, Kr. Zvyatkov, C^2-bounds on the elastic moduli of a random dispersion of spheres, Comptes rendus de l'Academie bulgare des Sciences, 41(7), 1988,21-24 |
10.12.2012 |
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Äîö. ä-ð . Êðàñèìèð Äèìèòðîâ Öâÿòêîâ
|
 íàó÷íî ñïèñàíèå
| Ñòàòèè
| K. Markov, Kr. Zvyatkov, On the optimal third-order bounds on the effective elastic moduli of random dispersions of spheres, Annuaire de l'Universite de Sofia,Faculte de Mathematiques et Informatique, Livre 2: Mecanique, 83(1989), 37-64 |
10.12.2012 |
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Äîö. ä-ð . Êðàñèìèð Äèìèòðîâ Öâÿòêîâ
|
 íàó÷íî ñïèñàíèå
| Ñòàòèè
| Kr. Zvyatkov, On certain Hashin-Shtrikman's type bounds for random dispersions, Comptes rendus de l'Academie bulgare des Sciences, 45(9), 1992,21-23 |
10.12.2012 |
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Äîö. ä-ð . Êðàñèìèð Äèìèòðîâ Öâÿòêîâ
|
 íàó÷íî ñïèñàíèå
| Ñòàòèè
| K. Markov, Kr. Zvyatkov, Functional series and Hashin-Shtrikman's type bounds on the effective conductivity of random media, European Journal of AppliedMathematics, 6, No 6, 1995, 611-629 |
10.12.2012 |
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Äîö. ä-ð . Êðàñèìèð Äèìèòðîâ Öâÿòêîâ
|
 íàó÷íî ñïèñàíèå
| Ñòàòèè
| Kr. Zvyatkov, On the effective conductivity of a class of random dispersions, Annuaire de l'Universite de Sofia, Faculte de Mathematiques et Informatique, Livre 2:Mat. Appl. et Inf., 89(1995), 1997, 217 - 235 |
10.12.2012 |
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Äîö. ä-ð . Êðàñèìèð Äèìèòðîâ Öâÿòêîâ
|
 íàó÷íî ñïèñàíèå
| Ñòàòèè
| Kr. Zvyatkov, A new approach for deriving c^2 - bounds on the effective conductivity of random dispersions, Annuaire de l'Universite de Sofia, Faculte deMathematiques et Informatique, Livre 2: Mat. Appl. et Inf., 91,(1997), 1998, 177 - 192 |
10.12.2012 |
