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Numerical modelling of the stress in the Pamir-Hindu Kush region

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Geodesy and Geodynamics 2022年第1期13卷 83-91页

作者： Ikram Atabekov Mirzoid muminov Aziz Atabekov Institute of Seismology Tashkent100128Uzbekistan National University of Uzbekistan Tashkent100174Uzbekistan

The current stress state of the Earth's crust in Central Asia depends entirely on the interaction of the Eurasian plate with the Indian and Arabian ***,an essential role in this action is played by the subduction process in the Pamir-Hind Kush *** this region,deep earthquakes and anomalies in seismic velocities indicate subduction of the Indian *** determine the effect of earthquakes on the stress state of the Earth's crust in Central Asia,we analyzed the hypocenters according to the available data over a hundred *** the envelope of the hypocenters as the surface of the subducted indenter,we analyzed its penetration into the *** of the pushing force of the indenter,the velocity of the Indian plate is taken into consideration.A model of the stresses is constructed on the equations of creeping motion of a viscous incompressible *** stress variation in the Earth's crust and mantle was calculated as the stress difference before and after the *** mechanism of earthquakes is modelled by an introduction of equivalent volume forces in the equilibrium equations corresponding to a couple dipoles without a *** equations of creeping motion are numerically solved using boundary element *** experiments with different physical model pa-rameters for the Earth's crust and mantle were *** introduce the negative buoyancy of the subducting plate,partial eclogitization of the rocks in the collision zone was *** a result,a certain combination of stiffness and density was determined for the lithosphere and mantle,which explained the peculiarities of this *** influence of crustal and mantle earthquakes in the Pamir-Hindu Kush region on the change in background stresses in Central Asia was analyzed which are not higher than 2-3%.

关键词： Pamir-hindu kush Stress state Mantle earthquakes Boundary element method

Equivalence of Paths under the Action of the Real Representation of Sp(n)

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Journal of Applied Mathematics and Physics 2022年第5期10卷 1837-1858页

作者： muminov K. Khodyrovich Juraboyev S. Solyjonovich Department of Mathematics National University of Uzbekistan named after Mirzo Ulugbek Tashkent Uzbekistan Department of Mathematics and Computer Science Fergana State University Fergana Uzbekistan

In this article, we will consider questions of G-equivalence of paths for the case when G was the group of the real representation of a symplectic transformation in an n-dimensional quaternion vector space. In determining the solution of this problem, we give an explicit description of differential generators of a differential field of differential rational functions that are invariant under the action of this group. Necessary and sufficient conditions for the G-equivalence of paths in a 4n-dimensional real space are obtained with the help of differential generators.

关键词： Real Representation Differential Invariant Differential Generators Path in a Finite-Dimensional Space

Temperature Dependence of Urbach Energy in Non-Crystalline Semiconductors

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Optics and Photonics Journal 2020年第9期10卷 211-218页

作者： Rustam Ikramov Mashxura Nuriddinova Khurshidbek muminov Ravshan Zhalalov Namangan Engineering and Technology Institute Namangan Uzbekistan Namangan State University Namangan Uzbekistan

Until now, no analytical relationships have been derived for the temperature dependence of the Urbach energy in non-crystalline semiconductors. Consequently, the problem associated with the theoretical study of the temperature dependence of this energy has not been solved. This paper presents the results of theoretical calculations and attempts to establish the temperature dependence of the Urbach energy in non-crystalline semiconductors. A linear increase in the Urbach energy with increasing temperature is shown.

关键词： Non-Crystalline Semiconductors Urbach Rules Urbach Energy Optical Transitions

Cost Effectiveness of Growing Cotton Depending on Irrigation Source and Groundwater Salinity in the Ferghana Valley, Uzbekistan

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Agricultural Sciences 2017年第8期8卷 729-742页

作者： Sherzod muminov Galina Stulina Islom Rusiev International Fund for the Aral Sea Saving Interstate Coordination Water Commission Scientific-Information Center Tashkent Uzbekistan

Given article describes the current status of irrigated agriculture in the Ferghana province, Republic of Uzbekistan. Climatic, hydrogeological, and soil conditions and hydromodule zoning of the Water User Association (WUA) Oktepa Zilol were studied, and, on this basis, the farms growing cotton were selected. Variable and fixed costs and profitability of cotton-growing farms were analyzed. Based on the books of those farms, the crop budget was drawn up. Relationships between the profitability of cotton-growing farm and the irrigation sources used and soil fertility in the farm are explained. Finally, proposals for improvement of cotton production using various sources of irrigation under different degrees of groundwater salinity are provided.

关键词： Irrigation Groundwater Drainage Water Salinity Costs Revenue

Present problems of water management and agrarian reforms in uzbekistan

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Agricultural Sciences 2012年第4期3卷 524-530页

作者： Nasirjon Yusupov Sherzod muminov Ilkhom Ibragimov Boris Gojenko Scientific Information Center of Interstate Coordination Water Commission of Central Asia Tashkent Uzbekistan

The agriculture of Uzbekistan always played the important role in economy and in social life of the country. In spite of the fact that new branches of production have been created in the last years, and much higher rates the industry and service sphere were developed, the agriculture remains the one of leading directions and takes the important place in gross national product production. Its role is connected also with that it is the supplier of raw materials for quickly developing and demanded branches of light and food industry, and by that the considerable part of Uzbek population lives in rural areas and this or another ways connected with agrarian production. However, for the further development of this branch there are a number of barriers. From them the limitation of water resources and reclamation condition of the lands as well as the food security achieving are the main.

关键词： Uzbekistan Agriculture Water Management Agrarian Reforms

Strong Consistency of the Spline-Estimation of Probabilities Density in Uniform Metric

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Open Journal of Statistics 2016年第2期6卷 373-379页

作者： Mukhammadjon S. muminov Khaliq S. Soatov Institute of Mathematics National University of Uzbekistan Tashkent Uzbekistan Tashkent University of Information Technologies Tashkent Uzbekistan

In the present paper as estimation of an unknown probability density of the spline-estimation is constructed, necessity and sufficiency conditions of strong consistency of the spline-estimation are given.

关键词： Strong Consistency Spline-Estimation Probability Density in Uniform Metric Uniform Metric Soatov muminov Tashkent University Institute of Mathematics

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Linux系统中网络安全问题的研究与应用

Linux系统中网络安全问题的研究与应用

作者： muminov Amrullo（阿默）兰州理工大学

学位级别：硕士

网络系统的安全性是企业发展中的重要任务,主要策略是屏蔽对各种网络设备未经授权的访问。服务器作为网络中的重要设备,其包括Web服务器,文件服务器,邮件服务器,代理服务器等。确保这些服务器的安全是每一个安全实现机制中的关键步骤。... 详细信息

网络系统的安全性是企业发展中的重要任务,主要策略是屏蔽对各种网络设备未经授权的访问。服务器作为网络中的重要设备,其包括Web服务器,文件服务器,邮件服务器,代理服务器等。确保这些服务器的安全是每一个安全实现机制中的关键步骤。为了达到该目的,本文分析和研究了操作系统的安全机制,对Linux系统中的网络安全问题进行了分类,对其中典型问题进行仿真,并提出了相应的解决策略。该论文分析了Linux系统环境下确保网络安全所需的工作。Linux系统的各种安全模块使它不同于其它操作系统,本文研究了提高Linux系统安全性的主要措施,并以此作为实际运用的基准。在分析了实现网络安全的措施之后,本文详细研究了网络监控工具以及Linux内置的日志管理功能在维护网络安全中所起到的作用。在系统实现部分,为测试网络的安全性,通过Linux系统构建了由不同服务器、应用防火墙以及分组过滤器所构成的本地网络,并在每台服务器上配置相应的安全策略,以此来提高它们的安全性。当未授权的用户从外部网络对内部服务器进行访问时,通过不同的网络监控工具及Linux内置日志文件,能提供针对操作系统详细的攻击信息。实验结果表明,本文所提出的安全措施能很好地捕获未授权的网络访问,提高了系统的安全性。

关键词：本地网络互联网防火墙 Linux系统网络安全

Studying of Kinematics and Elements of Tension of Blocks of the Massif According to Field Geological Observations

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World Journal of Mechanics 2017年第9期7卷 243-254页

作者： R. A. Umurzakov M. Yu. muminov Tashkent State Technical University Tashkent Uzbekistan Institute of Seismology of Academy Sciences of Republic Uzbekistan Tashkent Uzbekistan

The description of the received new results of field geological (teсtonophysical) study of massifs of rocks is provided: tectonic jointing, explosive and folded deformations, mirrors of slidings, tectonic motions of blocks of breeds. Reconstruction of fields of tension according to geological data of the certain massif of the Chatkalo-Kurama mountain area (Tien-Shan)—a coastal zone of the Charvak reservoir and the Almalyk mining industrial region is executed. The multidirectional motions of blocks of rocks in the massif of a coastal zone of the Charvak reservoir connected with tectonic and technogenic factors are revealed. The scheme of kinematics and the intense deformed condition of blocks of the Almalyk district is received. Here the regional field of tension with horizontal and submeridional orientation of an axis of the main normal tension of compression at the inclined provision of two other axes are observed. The received results testify to opportunities field the tectonophysical of methods for obtaining important data on kinematics and dynamics of massifs of rocks, tectonic blocks, and features of their deformation. Such studying of the massif of rocks before the beginning and in the course of performance of work on objects of the national economy is important for the choice of design and optimum parameters of laying of excavations, control of a condition of their boards and walls, definition of strategy of safety of conducting mining operations and also seismic stability of constructions.

关键词： Massif of Rocks Structure Kinematics Dynamics Tectonophysics Deformations Mirrors of Slidings Field of Tension

A Note on Spline Estimator of Unknown Probability Density Function

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Open Journal of Statistics 2011年第3期1卷 157-160页

作者： Muhanmadjon S. muminov Kh. Soatov 不详

In the present paper as estimation of unknown pdf derivative of a spline function is suggested. It is studied its some statistical properties which are used to approximate maximal deviation of the spline estimation fr... 详细信息

关键词： Spline-Estimator Empirical Distribution Gauss Process