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

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Variability, inheritance of fiber length in 4-5 specific and backcross hybrids, tolerance of cotton hybrids to bollworm in depending of the level of gossypol 4-5个特异和回交杂交种纤维长度的变异、遗传、棉酚水平对棉铃虫的耐受性
Bulletin of National University of Uzbekistan: Mathematics and Natural Sciences Pub Date : 2018-06-25 DOI: 10.56017/2181-1318.1037
Sayfulla G. Boboyev, F. Kushanov, I. Amanturdiev, G. Akhmedjanova
{"title":"Variability, inheritance of fiber length in 4-5 specific and backcross hybrids, tolerance of cotton hybrids to bollworm in depending of the level of gossypol","authors":"Sayfulla G. Boboyev, F. Kushanov, I. Amanturdiev, G. Akhmedjanova","doi":"10.56017/2181-1318.1037","DOIUrl":"https://doi.org/10.56017/2181-1318.1037","url":null,"abstract":"In this paper presents data of researches about fiber length in the 4-5 species. The largest number of plants with the indicated analyzed trait in hybrid combinations, obtained with the participation of the Omad variety, appeared with a number of variations in fiber length at 35.0-36.0 mm and above. Investigation of 4-species hybrids of F2 and back cross hybridization allowed some improvement in the average value of trait when compared with F1. Despite the emergence of transgressive plants with fiber length 36.1-37.0 mm and above, the average trait of composite 5 species hybrids F2 remained almost at the level of F1, i.e. 35.5-36.0 mm. The greatest number of positive recombinants occurred in 5 species back crossing developed with the participation of Termez31. And data about on tolerance of senior generations of cotton hybrids to cotton bollworm with different levels of (+)-gossypol in seeds. On the basis was obtained results, revealed that the level of (+)-gossypol in seeds does not significantly resistance to cotton bollworm, i.e. Confirmed the possibility of selecting new broods and lines of cotton with different levels (+)-gossypol and tolerance to Helicoverpa armigera. Results of researches of comparative resistance to Helicoverpa armigera among hybrids of different generations in petri dishes, it was established that progenies with a different levels of (+)gossypol, a definite pattern is observed for affection. Genotypes with a low level of (+)-gossypol are affected by Helicoverpa armigera to a certain extent less than hybrids with high (+)-gossypol level. Although, the incidence of the initial accession BC3S1 − 1− 6− 3− 15 with a high level of gossypol does not preclude the possibility of developing of resistant genotypes with a high level of (+)-gossypol, which requires additional researches in this direction.","PeriodicalId":127023,"journal":{"name":"Bulletin of National University of Uzbekistan: Mathematics and Natural Sciences","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115530757","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
Ecological-taxonomical analysis of collembolans of the northeast of Uzbekistan 文章标题乌兹别克斯坦东北部松毛虫的生态分类学分析
Bulletin of National University of Uzbekistan: Mathematics and Natural Sciences Pub Date : 2018-06-25 DOI: 10.56017/2181-1318.1036
M. Rakhimov, Z. Elmuratova, Dilfuza Majidova
{"title":"Ecological-taxonomical analysis of collembolans of the northeast of Uzbekistan","authors":"M. Rakhimov, Z. Elmuratova, Dilfuza Majidova","doi":"10.56017/2181-1318.1036","DOIUrl":"https://doi.org/10.56017/2181-1318.1036","url":null,"abstract":"Paper is devoted to the ecological and faunistic analysis of the collembolans unit of the Northeast region of Uzbekistan. In the agrocenoses of apple orchard, wheat and surrounding ecosystems, 40 species of collembolans have been identified. Of these, 29 species were found in agrocenoses (apple orchard and wheat), and 40 (in natural communities). We observed the same pattern in a huge population density in the cenoses studied. It is significantly more in natural communities (12386 copies per 1 m2 of soil) as compared with agrocenoses (6980 copies per 1 m2 of soil). The horizons of the surface layer (10-20 cm) of soil are most densely populated by collembolans.","PeriodicalId":127023,"journal":{"name":"Bulletin of National University of Uzbekistan: Mathematics and Natural Sciences","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126390142","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
Positive fixed points of Lyapunov integral operators and Gibbs measures Lyapunov积分算子与Gibbs测度的正不动点
Bulletin of National University of Uzbekistan: Mathematics and Natural Sciences Pub Date : 2018-03-25 DOI: 10.56017/2181-1318.1003
F. Haydarov
{"title":"Positive fixed points of Lyapunov integral operators and Gibbs measures","authors":"F. Haydarov","doi":"10.56017/2181-1318.1003","DOIUrl":"https://doi.org/10.56017/2181-1318.1003","url":null,"abstract":"","PeriodicalId":127023,"journal":{"name":"Bulletin of National University of Uzbekistan: Mathematics and Natural Sciences","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130615605","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
On the manifolds of positive curvature 在正曲率流形上
Bulletin of National University of Uzbekistan: Mathematics and Natural Sciences Pub Date : 2018-03-25 DOI: 10.56017/2181-1318.1007
Jasurbek Aslonov
{"title":"On the manifolds of positive curvature","authors":"Jasurbek Aslonov","doi":"10.56017/2181-1318.1007","DOIUrl":"https://doi.org/10.56017/2181-1318.1007","url":null,"abstract":"In this paper invariant metrics on Lie group G = S3 ×R are studied and it is found lower and upper bounds for the sectional curvature’s of the manifold G = S3 ×R.","PeriodicalId":127023,"journal":{"name":"Bulletin of National University of Uzbekistan: Mathematics and Natural Sciences","volume":"60 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114627076","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
Some cardinal and topological properties of the n-permutation degree of a topological spaces and locally τ-density of hyperspaces 拓扑空间的n置换度和超空间的局部τ-密度的一些基本性质和拓扑性质
Bulletin of National University of Uzbekistan: Mathematics and Natural Sciences Pub Date : 2018-03-25 DOI: 10.56017/2181-1318.1010
F. Mukhamadiev
{"title":"Some cardinal and topological properties of the n-permutation degree of a topological spaces and locally τ-density of hyperspaces","authors":"F. Mukhamadiev","doi":"10.56017/2181-1318.1010","DOIUrl":"https://doi.org/10.56017/2181-1318.1010","url":null,"abstract":"In the paper we investigate some cardinal and topological properties of the npermutation degree of a topological spaces and locally τ -density of hyperspaces. It is proved that the functors expn and SPn preserves locally τ -density of any infinite T1-spaces.","PeriodicalId":127023,"journal":{"name":"Bulletin of National University of Uzbekistan: Mathematics and Natural Sciences","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124020923","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: 3
Carleman’s formula for the matrix upper half-plane 矩阵上半平面的carlemanz公式
Bulletin of National University of Uzbekistan: Mathematics and Natural Sciences Pub Date : 2018-03-25 DOI: 10.56017/2181-1318.1004
G. Khudayberganov, Z. Matyakubov
{"title":"Carleman’s formula for the matrix upper half-plane","authors":"G. Khudayberganov, Z. Matyakubov","doi":"10.56017/2181-1318.1004","DOIUrl":"https://doi.org/10.56017/2181-1318.1004","url":null,"abstract":"","PeriodicalId":127023,"journal":{"name":"Bulletin of National University of Uzbekistan: Mathematics and Natural Sciences","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129116273","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
Carleman's formula for the matrix upper half-plane 矩阵上半平面的Carleman公式
Bulletin of National University of Uzbekistan: Mathematics and Natural Sciences Pub Date : 2018-03-25 DOI: 10.56017/2181-1318.1009
G. Khudayberganov, Z. Matyakubov
{"title":"Carleman's formula for the matrix upper half-plane","authors":"G. Khudayberganov, Z. Matyakubov","doi":"10.56017/2181-1318.1009","DOIUrl":"https://doi.org/10.56017/2181-1318.1009","url":null,"abstract":"In this work the Carleman’s formula for the matrix upper half-plane is obtained.","PeriodicalId":127023,"journal":{"name":"Bulletin of National University of Uzbekistan: Mathematics and Natural Sciences","volume":"73 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116754753","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
Using an a priori estimate for constructing difference schemes for quasi-linear hyperbolic systems 用先验估计构造拟线性双曲型系统的差分格式
Bulletin of National University of Uzbekistan: Mathematics and Natural Sciences Pub Date : 2018-03-25 DOI: 10.56017/2181-1318.1000
R. Aloev, M. Khudayberganov
{"title":"Using an a priori estimate for constructing difference schemes for quasi-linear hyperbolic systems","authors":"R. Aloev, M. Khudayberganov","doi":"10.56017/2181-1318.1000","DOIUrl":"https://doi.org/10.56017/2181-1318.1000","url":null,"abstract":"","PeriodicalId":127023,"journal":{"name":"Bulletin of National University of Uzbekistan: Mathematics and Natural Sciences","volume":"s3-32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130135871","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
Complex diffusion Monte-Carlo method: test by the simulation of the 2D fermions 复扩散蒙特卡罗方法:二维费米子的模拟检验
Bulletin of National University of Uzbekistan: Mathematics and Natural Sciences Pub Date : 2001-01-30 DOI: 10.56017/2181-1318.1122
B. Abdullaev, M. Musakhanov, A. Nakamura
{"title":"Complex diffusion Monte-Carlo method: test by the simulation of the 2D fermions","authors":"B. Abdullaev, M. Musakhanov, A. Nakamura","doi":"10.56017/2181-1318.1122","DOIUrl":"https://doi.org/10.56017/2181-1318.1122","url":null,"abstract":"On the base of the diffusion Monte-Carlo method we develop the method allowing to simulate the quantum systems with complex wave function. The method is exact and there are no approximations on the simulations of the module and the phase of the system's wave function. In our method averaged value of any quantity have no direct contribution from the phase of distribution function but only from the phase of the Green function of diffusion equation. We test the method by the simulations of the ground state of fermions in two-dimensional parabolic well. Anyons are used for the representation of the two-dimensional (2D) fermions. We vary the number of fermions from two to ten and find a good agreement of the numerical results with analytical ones for the numbers of the particles N > 4.","PeriodicalId":127023,"journal":{"name":"Bulletin of National University of Uzbekistan: Mathematics and Natural Sciences","volume":"136 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132317916","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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