"We consider a discrete-time dynamical system generated by a nonlinear operator (with four real parameters a, b, c, d) of ocean ecosystem. We find conditions on the parameters under which the operator is reduced to a
-Volterra quadratic stochastic operator mapping two-dimensional simplex to itself. We show that if cd(c + d) = 0, then (under some conditions on a, b) this
-Volterra operator may have up to three or a countable set of fixed points; if cd(c + d) = 0, then the operator has up to three fixed points. Depending on the parameters, the fixed points may be attracting, repelling or saddle points. The limit behaviors of trajectories of the dynamical system are studied. It is shown that independently on values of parameters and on initial (starting) point, all trajectories converge. Thus, the operator (dynamical system) is regular. We give some biological interpretations of our results."

"The hyperbolic integro–differential acoustic equation is considered. Direct problem is to find the acoustic pressure from the initial - boundary value problem for this equation with point source located on the boundary of the space domain. The inverse problem is studied. It consists in determining the onedimensional kernel of the integral term using the solution of the direct problem at x = 0; t > 0. Inverse problem is reduced to the system of integral equations for unknown functions. The principle of contraction mappings is applied to this system in the space of continuous functions with weighted norms. The global unique solvability of the inverse problem is proved."

"The hyperbolic integro–differential acoustic equation is considered. Direct problem is to find the acoustic pressure from the initial - boundary value problem for this equation with point source located on the boundary of the space domain. The inverse problem is studied. It consists in determining the onedimensional kernel of the integral term using the solution of the direct problem at x = 0; t > 0. Inverse problem is reduced to the system of integral equations for unknown functions. The principle of contraction mappings is applied to this system in the space of continuous functions with weighted norms. The global unique solvability of the inverse problem is proved."

Equisetum arvense L. таркибидаги биологик–актив моддалар (алкалоидлар, кумаринлар, гликозидлар, эфир мойлар ва бошқа.) сифат анализини ўтказиш.

"The cotton raw material and its components refer to varieties of capillary porous materials, with some special characteristics that distinguishes them from the other known porous materials, such as coal, sand, wood, hemp, flax, etc. Transfer of moisture in the raw cotton and fibrous mass is rather a complicated process, the moisture conductivity here depends on the structure of the material and the nature of the bond of moisture with its pores, etc. The theoretical aspects of the process of moistening cotton of raw cotton are considered in the article, by modelling it with a multi component medium with a structural structure where both internal mass transfer and mass exchange with the external environment are taken into account. This approach allows us to develop a general model for moistening cotton raw, which is close to real situations, thus ensuring the best adequacy of the accepted design scheme"

O’quv qo’llanma ilmiy–texnik hisoblar va ishlab chiqarish tizimlarining modellashtirish masalalarini o’rganishda keng imkoniyatlarga ega bo’lgan amaliy dasturiy paketlar tizimlarining ajralmas qismi bo’lgan Matlab, Maple, Mathcad va boshqa kompyuter tizimlari haqida asosiy bazaviy ma’lumotlardan iborat.

Данное учебное пособие предназначено для студентов высших учебных заведений подгатавливаемых в области образования компьютерные технологии и информатика.

O‘quv uslubiy qo‘llanma Muhammad al-Xorazmiy nomidagi Toshkent axborot texnologiyalari universiteti barcha yoʻnalishlarida ta’lim oluvchi talabalar uchun moʻljallangan.

In dieser Magisterarbeit geht die Rede über die Besonderheiten der Entwicklung des Schreibens im Deutschunterricht. Die Autorin beschreibt zuerst die Geschichte und die Herstellung des Problems Schreiben im fremdsprachlichen Deutschunterricht, analysiert verschiedene Hinsichten und Meinungen der berühmten Wissenschaftler über die Rolle und die Funktion des Schreibens, zeigt die Einstimmungen mit Gemeinsamen Europäischen Referenzrahmen, gibt ihre Vorschläge aus eigene Erfahrungen in den Schulen

"Ehtimollar nazariyasi va matematik statistikadan masalalar to‘plami va ularni yechishga doir ko‘rsatmalar"