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Bulletin of National University of Uzbekistan: Mathematics and Natural Sciences最新文献

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Jump theorems for the Bochner-Martinelli integral in domains with a piecewise smooth boundary 分段光滑边界域上Bochner-Martinelli积分的跳跃定理
Bulletin of National University of Uzbekistan: Mathematics and Natural Sciences Pub Date : 2020-02-24 DOI: 10.56017/2181-1318.1048
A. Kytmanov, D. Dzhumabaev, B. Utemuratov, B. Prenov
{"title":"Jump theorems for the Bochner-Martinelli integral in domains with a piecewise smooth boundary","authors":"A. Kytmanov, D. Dzhumabaev, B. Utemuratov, B. Prenov","doi":"10.56017/2181-1318.1048","DOIUrl":"https://doi.org/10.56017/2181-1318.1048","url":null,"abstract":"","PeriodicalId":127023,"journal":{"name":"Bulletin of National University of Uzbekistan: Mathematics and Natural Sciences","volume":"155 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-02-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115826734","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
The effect of prebiotics on intestinal digestion of carbohydrates in lead intoxicated rats 益生元对铅中毒大鼠肠道碳水化合物消化的影响
Bulletin of National University of Uzbekistan: Mathematics and Natural Sciences Pub Date : 2019-12-24 DOI: 10.56017/2181-1318.1047
L. S. Kuchkarova, Irodakhon I. Karimova, Gulchekhra T. Kudeshova, K. Kayumov
{"title":"The effect of prebiotics on intestinal digestion of carbohydrates in lead intoxicated rats","authors":"L. S. Kuchkarova, Irodakhon I. Karimova, Gulchekhra T. Kudeshova, K. Kayumov","doi":"10.56017/2181-1318.1047","DOIUrl":"https://doi.org/10.56017/2181-1318.1047","url":null,"abstract":"It has been shown the lead intoxication of growing rats result in increase the cavity and membrane carbohydrate hydrolysis and glucose absorption from small intestine which leads to hyperglicemiya. The oral treatment of intoxicated rats with inulin or lactulose results in decrease of carbohydrate assimilation in small intestine and content glucose level in blood. The correcting effect of lactulose on normalization of carbohydrate assimilation is more expressed in compare with inulin. So, inulin and/or lactulose take part in improving of adaptation of the carbohydrate assimilation system in the small intestine during intoxication with lead ions in growing rats. This suggests the prospect of their use as physiologically acceptable additives to stabilize carbohydrate digestion and blood glucose levels in lead and, possibly, other heavy metal intoxication in the growing organism.","PeriodicalId":127023,"journal":{"name":"Bulletin of National University of Uzbekistan: Mathematics and Natural Sciences","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114026494","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Research of parabolic surface points in Galilean space 伽利略空间中抛物曲面点的研究
Bulletin of National University of Uzbekistan: Mathematics and Natural Sciences Pub Date : 2019-11-22 DOI: 10.56017/2181-1318.1034
A. Artykbaev, B. Sultanov
{"title":"Research of parabolic surface points in Galilean space","authors":"A. Artykbaev, B. Sultanov","doi":"10.56017/2181-1318.1034","DOIUrl":"https://doi.org/10.56017/2181-1318.1034","url":null,"abstract":"The paper studies the surfaces of the Galilean space R1 3. First, we consider the geometry of the surface in a small neighborhood of a point on the surface. Basically, we studied the points of the surface where at least one of the principal curvature appeals to zero. Two classes of points are defined where at least one of the principal curvature is zero. These points are divided into two types, parabolic and especially parabolic. It is proved that these neighborhoods using the movement of space is impossible to move each other. A sweep of surfaces with parabolic and especially parabolic points is constructed. A geometric image of the cone sweep in Galilean space is given. In Galilean space, we consider surfaces that do not have special planes. A class of surfaces with no special tangent planes is defined. A geometric image of a cone sweep in Galilean space is given. In Galilean space, surfaces that do not have special planes are considered. A class of surfaces is defined that do not have special tangent planes. At the end of the article, a classification of surface points in Galilean space is given.","PeriodicalId":127023,"journal":{"name":"Bulletin of National University of Uzbekistan: Mathematics and Natural Sciences","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134441072","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
2-local derivations on Virasoro algebras Virasoro代数上的2-局部导数
Bulletin of National University of Uzbekistan: Mathematics and Natural Sciences Pub Date : 2019-11-20 DOI: 10.56017/2181-1318.1033
Sh. A. Ayupov, B. Yusupov
{"title":"2-local derivations on Virasoro algebras","authors":"Sh. A. Ayupov, B. Yusupov","doi":"10.56017/2181-1318.1033","DOIUrl":"https://doi.org/10.56017/2181-1318.1033","url":null,"abstract":"","PeriodicalId":127023,"journal":{"name":"Bulletin of National University of Uzbekistan: Mathematics and Natural Sciences","volume":"259 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127366432","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 5
Asymptotics of solutions and numerical simulation of the nonlinear heat conductivity problem with absorption and variable density 含吸收变密度非线性导热问题解的渐近性及数值模拟
Bulletin of National University of Uzbekistan: Mathematics and Natural Sciences Pub Date : 2019-08-08 DOI: 10.56017/2181-1318.1028
M. Aripov, A. Mukimov
{"title":"Asymptotics of solutions and numerical simulation of the nonlinear heat conductivity problem with absorption and variable density","authors":"M. Aripov, A. Mukimov","doi":"10.56017/2181-1318.1028","DOIUrl":"https://doi.org/10.56017/2181-1318.1028","url":null,"abstract":"In the present work, the asymptotic behavior of the solutions of the nonlinear variable-density thermal conductivity problem with absorption is obtained. The critical value parameter is considered. The resulting asymptotics was used as an initial approximation, numerical calculations were performed. As a difference scheme, a three-layer difference scheme was used, which, unlike a two-layer scheme, has greater accuracy.","PeriodicalId":127023,"journal":{"name":"Bulletin of National University of Uzbekistan: Mathematics and Natural Sciences","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-08-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124197236","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Physico-chemical properties new nitrogen- and phosphorus containing ion exchange resine on the base of polyvinylchloride 聚氯乙烯基新型含氮磷离子交换树脂的理化性质
Bulletin of National University of Uzbekistan: Mathematics and Natural Sciences Pub Date : 2019-08-08 DOI: 10.56017/2181-1318.1031
D. Bekchanov, M. Mukhamediev, D. Gafurova
{"title":"Physico-chemical properties new nitrogen- and phosphorus containing ion exchange resine on the base of polyvinylchloride","authors":"D. Bekchanov, M. Mukhamediev, D. Gafurova","doi":"10.56017/2181-1318.1031","DOIUrl":"https://doi.org/10.56017/2181-1318.1031","url":null,"abstract":"Peculiarities of the interaction of PPE-1 anion exchange resin with phosphonic acid production based on granular polyvinyl chloride were studied. As a result of the modification, a polyampholite was obtained in terms of physicochemical properties not inferior to the industrial polyampholite APFC-45. We also investigated the sorption of copper (II), nickel (II) and indium (III) ions on a polyampholite based on granular polyvinylchloride. The dependence of static adsorption on aqueous solutions on the concentration of metal ions and the temperature of the system is established. Isotherms were constructed and found the adsorption equilibrium constants, the thermodynamic parameters of the process isobaric isothermal potential (∆G), enthalpy (∆H) and entropy (∆S). It is shown that the investigated sorbent absorbs ions Cu (II) to a greater extent than the other ions.","PeriodicalId":127023,"journal":{"name":"Bulletin of National University of Uzbekistan: Mathematics and Natural Sciences","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-08-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126927421","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Strain effect on the electronic transport properties of carbyne 应变对碳炔电子输运性质的影响
Bulletin of National University of Uzbekistan: Mathematics and Natural Sciences Pub Date : 2019-08-08 DOI: 10.56017/2181-1318.1030
G. Eshonqulov, G. Berdiyorov, H. Hamoudi
{"title":"Strain effect on the electronic transport properties of carbyne","authors":"G. Eshonqulov, G. Berdiyorov, H. Hamoudi","doi":"10.56017/2181-1318.1030","DOIUrl":"https://doi.org/10.56017/2181-1318.1030","url":null,"abstract":"Quantum transport calculations are conducted using density functional theory in combination with Green’s functional formalism to study the effect of external strain on the electronic transport properties of carbyne, 1D carbon allotrope, which has recently received a revival of interest due to its extraordinary mechanical, thermal and electronic properties. The current in the system increases monotonically by increasing the compressive strain, whereas the tensile strain results in the reduction of the charge transport. The obtained results are explained by spatial variations of the electrostatic potential along the carbon chain and nanoscale localization of the charge carriers. These findings can be of practical importance for carbyne-based nanotechnology development.","PeriodicalId":127023,"journal":{"name":"Bulletin of National University of Uzbekistan: Mathematics and Natural Sciences","volume":"47 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-08-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131015772","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Periodic table of elements, Mendeleev's periodic table: history, achievements and problems 元素周期表，门捷列夫的元素周期表:历史、成就与问题
Bulletin of National University of Uzbekistan: Mathematics and Natural Sciences Pub Date : 2019-06-06 DOI: 10.56017/2181-1318.1023
B. Oksengendler, K. Mukimov, R. Letfullin, N. Turaeva, G. Abdurakhmanov, S. Yuldashev
{"title":"Periodic table of elements, Mendeleev's periodic table: history, achievements and problems","authors":"B. Oksengendler, K. Mukimov, R. Letfullin, N. Turaeva, G. Abdurakhmanov, S. Yuldashev","doi":"10.56017/2181-1318.1023","DOIUrl":"https://doi.org/10.56017/2181-1318.1023","url":null,"abstract":"This paper, devoted to the yubilee of Mendeleev’s table, deals with a set of historical and physico-chemical problems related it. Basing on the evolutional approach to the development of the concept of “elements and structure” and up to the appearance of the notion “complexity” we discuss the applicability of Mendeleev’s table to the understanding of modern aspects of science such as “nano”, “fractals”, “synergetics” and “hirality”. The problems which are open for further research are revealed and the particular importance of their development for the condensed matter science of living and nonliving matter is pointed out.","PeriodicalId":127023,"journal":{"name":"Bulletin of National University of Uzbekistan: Mathematics and Natural Sciences","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129548231","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Test particle motion around brany black hole immersed in an external asymptotically uniform magnetic field 在外部渐近均匀磁场中测试黑洞周围粒子的运动
Bulletin of National University of Uzbekistan: Mathematics and Natural Sciences Pub Date : 2019-06-06 DOI: 10.56017/2181-1318.1024
Djavlanbek Rayimbaev, A. Rakhmatov, S. Palvanov, Ahror Mamadjanov
{"title":"Test particle motion around brany black hole immersed in an external asymptotically uniform magnetic field","authors":"Djavlanbek Rayimbaev, A. Rakhmatov, S. Palvanov, Ahror Mamadjanov","doi":"10.56017/2181-1318.1024","DOIUrl":"https://doi.org/10.56017/2181-1318.1024","url":null,"abstract":"","PeriodicalId":127023,"journal":{"name":"Bulletin of National University of Uzbekistan: Mathematics and Natural Sciences","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127491405","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
On the continuation of the Hartogs series with holomorphic coefficients 关于全纯系数Hartogs级数的延拓
Bulletin of National University of Uzbekistan: Mathematics and Natural Sciences Pub Date : 2019-03-25 DOI: 10.56017/2181-1318.1021
Takhir Tuychiev, Jurabay Tishabaev
{"title":"On the continuation of the Hartogs series with holomorphic coefficients","authors":"Takhir Tuychiev, Jurabay Tishabaev","doi":"10.56017/2181-1318.1021","DOIUrl":"https://doi.org/10.56017/2181-1318.1021","url":null,"abstract":"In this paper we consider the question of continuation of the sums of the Hartogs series that admit holomorphic continuation along a fixed direction with “thin” singularities, assuming only the holomorphic of the coefficients of the series and investigate the convergence region of such series. The results of the work develop a well-known result of A.Sadullaev and E.M.Chirka on the continuation of functions with polar singularities.","PeriodicalId":127023,"journal":{"name":"Bulletin of National University of Uzbekistan: Mathematics and Natural Sciences","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130140368","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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