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БУУнун туруктуу өнүгүүсү [17]

Факультет / Институт [5]

Басылманын түрү [7]

Жарыяланган жылы [20]

Тили [4]

Булагы [70]

Маалымат базалар [61]

Индекс түрү [10]

Индекс түрү 2 [3]

Басмаканасы [70]

Бөлүмү [18]

Улуттук/Эл аралык [2]

Предметтик рубрикатор [70]

Technical, Science and Applied SciencesКыргыз-Түрк «Манас» университети Құрметсіз құрметінің көлемі

On the Solvability of the Synthesis Problem for Optimal Control Systems with Distributed Parameters

Elmira ABDILDAYEVA

The solvability of synthesis problem of external and boundary controls is investigated for optimization of oscillation process, described by partial differential equations with Fredholm integral operator. Functions of the external and boundary actions are nonlinearly with respect to control. An integro-differential equation is obtained in the specific type for Bellman functional. An algorithm is developed for constructing solutions to synthesis problem of external and boundary controls. Keywords: Generalized solution, Bellman functional, Frechet differential, Integro-differential equation, Fre ...Дагы

Китеп бөлүмү 2022 Fen Fakültesi Trends in Mathematics 60 Көрүүлөр

No Evidence of an Elevation Effect Caused by Temperature Differences on Soil Microbial Properties in a Walnut Fruit Forest in Kyrgyzstan

Cıldız ÖSKÖNBAEVA

This study is to investigate the effect of differences in annual average temperature on soil microbial communities as caused by elevation in walnut-fruit forests in Kyrgyzstan with similar vegetation. Soil samples (n 10 per site) were collected from top- and subsoil at three elevation levels (1000, 1300 and 1600 m above sea level) with an average temperature difference of 1.3 °C between sites and analysed for soil chemical and biological properties. All soil properties showed high variability within, but most revealed no differences between elevation levels. Microbial biomass, activity and com ...Дагы

Макала 2023 Mühendislik Fakültesi Journal of Soil Science and Plant Nutrition23 ( 2 ) 39 Көрүүлөр

On the solvability of a nonlinear optimization problem with boundary vector control of oscillatory processes = О разрешимости задачи нелинейной оптимизации при граничном векторном управлении колебательными процессами = Тербелмелi процестердi шекаралық векторлық басқарумен сызықтыемес оңтайландыру есебiнiң шешiмi туралы

Elmira ABDILDAYEVA

In the paper, the solvability of the nonlinear boundary optimization problem has been investigated for the oscillation processes, described by the integro-differential equation in partial derivatives with Fredholm integral operator. It has been established that the components of the boundary vector control are defined as a solution to a system of nonlinear integral equations of a specific form, and the equations of this system have the property of equal relations. An algorithm for constructing a solution to the problem of nonlinear optimization has been developed. Keywords: general solution; n ...Дагы

Макала 2023 Fen Fakültesi Bulletin of the Karaganda University - Mathematics / Вестник Карагандинского университета. Серия Математика109 ( 1 ) 38 Көрүүлөр

Концентрационное распределение молекул и частиц в модельной системе: Fe–NaCl–Na2S–H2SO4–H2O при различных температурах процесса электрокоагуляции

Zarlık MAYMEKOV | Canarbek İZAKOV | Nurzat ŞAYKİYEVA | Mustafa DOLAZ | Mehmet KOBYA

В практических условиях одним из возможных решений проблемы очистки сероводородсодержащих промышленных сточных вод является электрохимическое окисление сульфидов. С учетом этих обстоятельств, в работе рассмотрена модельная система Fe–NaCl–Na2S–H2SO4–H2O, собрана экспериментальная установка и изучен процесс электрокоагуляции в широких пределах изменения температуры (288–308 К) водного раствора сероводорода. Выявлены оптимальные соотношения исходных компонентов в системе. Определены экспериментальные и расчетные водородные показатели раствора (pH). Осуществлено термодинамическое моделирование си ...Дагы

Макала 2023 Mühendislik Fakültesi Теоретические основы химической технологии57 ( 2 ) 109 Көрүүлөр

Epidemiological characteristics and financial losses due to avian aspergillosis in households in the Almaty region, Republic of Kazakhstan

Nurbek ALDAYAROV

Aspergillosis is a severe fungal disease that affects all species and ages of poultry and leads to significant economic losses within the poultry industry. The economic significance of aspergillosis is associated with direct losses due to poultry mortality, a decline in the production of meat and eggs, feed conversion, and poor growth of recovering poultry. Although a decrease in the production of poultry meat and eggs in Kazakhstan due to this fungal disease has been widely reported, studies on the consequent financial losses on affected farms (households) have not been carried out. This stud ...Дагы

Макала 2023 Fen Fakültesi Frontiers in Veterinary Science10 38 Көрүүлөр

Fabrication of molecularly imprinted cotton fibers for quantification of streptomycin in honey samples

Nahit AKTAŞ

Streptomycin is a type of aminoglycoside used in treatment of several infections and with serious side effects in humans and animals, such as ototoxicity and nephrotoxicity. In the present study, we focused on the preparation of streptomycin-imprinted cotton fiber for rapid, sensitive and selective quantification of streptomycin in honey samples. The imprinted cotton fibers were characterized by attenuated total reflectance-Fourier transform spectroscopy, scanning electron microscopy, and x-ray photoelectron spectroscopy. In addition, the imprinted cotton fibers showed high adsorption capacity ...Дагы

Макала 2023 Mühendislik Fakültesi Journal of Applied Polymer Science140 ( 28 ) 58 Көрүүлөр

Bioremediation approaches for oil contaminated soils in extremely high-mountainous conditions

Nurzat TOTUBAYEVA | Ciyde TOKPAEVA | Canarbek İZAKOV | Mirlan MOLDOBAYEV

Development of methods for bioremediation of soils contaminated with petroleum products is one of the most urgent tasks of our time. This task is more difficult to perform in high-mountainous landscapes, at an altitude of more than 4 000 m a.s.l. Moreover, these high-mountain ecosystems are the most vulnerable to various kinds of anthropogenic impacts, and therefore the relevance of bioremediation is obvious. The research was conducted in the high-altitude ecosystems of the Kyrgyz Republic at the Kumtor mine. In this study was carried out on the bioremediation of oil contaminated soil using bi ...Дагы

Макала 2023 Mühendislik Fakültesi Plant, Soil and Environment69 ( 4 ) 27 Көрүүлөр

О методе функционалов Ляпунова для линейного вольтеррова интегродифференциального уравнения первого порядка с запаздыванием на полуоси

Samandar İSKANDAROV

Устанавливаются достаточные условия, обеспечивающие оценку, ограниченность, степенную абсолютную интегрируемость на полуоси, стремление к нулю при стремлении к бесконечности независимой переменной всех решений линейного вольтеррова интегродифференциального уравнения первого порядка с запаздыванием. Для этого строится обобщенный функционал Ляпунова. Приводится иллюстративный пример. Keywords: volterra integrodifferential equation of the first order; argument lag; estimation; boundedness; absolute integrability; tending to zero of solutions; generalized method of lyapunov functionals

Макала 2023 Fen Fakültesi Вестник Московского университета. Серия 1: Математика. Механика ( 3 ) 17 Көрүүлөр

Выбор параметров решения линейных неклассических уравнений первого рода

Avıt ASANOV

В рассматриваемой работе выбран параметр регуляризации для решения линейного интегрального уравнения Вольтерра первого рода. Во многих работах были исследованы различные вопросы для интегральных уравнений. Даже когда уравнение первого типа Вольтерры является интегральным уравнением с точным выходом, неклассические уравнения, интегрируемые по предел, являются линейными, и нелинейные интегральные уравнения являются линейными, и это обусловлено необходимостью разработки новых методов для единственности их решений. Но в данной работе получены основополагающие результаты для интегральных уравнений ...Дагы

Макала 2023 Fen Fakültesi Бюллетень науки и практики / Bulletin of Science and Practice9 ( 4 ) 27 Көрүүлөр

The advanced polymer composite coated fabrics as an anode electrode and photocatalytic glucose micro fuel cell design

Hilal DEMİR KIVRAK

At present, poly N-isopropyl acrylamide (PNIPAM) polymer composites containing titanium dioxide (TiO2) and carbon-TiO2 (C-TiO2) were designed for photocatalytic glucose electrooxidation by coating the textile fabric surface such as wool blended fabrics called Sign Cocana (SC), Valencia (VC), Dante (DT), and Broadway (BW). C-TiO2 was obtained from TiO2 in a furnace under hexane gas with a certain temperature and time. Polymer synthesis was realized by a polymerization method. The surface analyses of these polymer composite fabric electrodes were characterized by scanning electron microscopy-ene ...Дагы

Макала 2023 Mühendislik Fakültesi Journal of Photochemistry and Photobiology A: Chemistry444 15 Көрүүлөр

Antibiotic residuals removal via novel fabricated hydrogel from 2-hydroxyethyl methacrylate and sodium methacrylate

Urmat Coldoşbek Uulu | Nahit AKTAŞ

In this study, poly(2-hydroxyethyl-sodium methacrylate) (p(HEMA-SMA)) hydrogels were synthesized as a novel adsorbent to remove antibiotic residues from environmental samples. [p(HEMA-SMA)] co-polymers were synthesized by the free radical photopolymerization method. Synthesized hydrogels were characterized by different methods such as Fourier-transform infrared spectroscopy (FTIR), elemental and scanning electron microscope (SEM), and surface area calculations. The average size surface area of the synthesized hydrogels were 1.515 µm. Penicillin G (Pen. G) was used as the sample antibiotic for ...Дагы

Макала 2023 Lisansüstü Eğitim Enstitüsü MANAS Journal of Engineering (MJEN)11 ( 1 ) 33 Көрүүлөр

Production of secondary metabolites using tissue culture-based biotechnological applications

Yılmaz KAYA

Plants are the sources of many bioactive secondary metabolites which are present in plant organs including leaves, stems, roots, and flowers. Although they provide advantages to the plants in many cases, they are not necessary for metabolisms related to growth, development, and reproduction. They are specific to plant species and are precursor substances, which can be modified for generations of various compounds in different plant species. Secondary metabolites are used in many industries, including dye, food processing and cosmetic industries, and in agricultural control as well as being use ...Дагы

Обзор 2023 Fen Fakültesi Frontiers in Plant Science14 17 Көрүүлөр