Статьи

Jahonda shо‘r suvdan chuchuk suv olishning turli usullari qо‘llaniladi. Chuchuklantirish jarayoniga katta miqdordagi energiya talab etilganligi sababli, qayta tiklanuvchi energiya manbalari, xususan quyosh energiyasidan foydalanib chuchuk suv olish dolzarb masalalardan biri hisoblanadi. Quyosh suv chuchutgichlarining unumdorligi quyosh nurlanish intensivligi, shamol tezligi, bug‘latish kamerasidagi suv sathiga va shaffof qoplamani о‘rnatilish burchagiga bog‘liq bо‘lib, ushbu omillarni tо‘g‘ri tanlash orqali quyosh suv qurilmalarining unumdorligini optimallashtirish mumkin. Shuningdek quyosh suv chuchutgich qurilmalarida bug‘ni kondensatsiyalanish tezligini oshirish yordamida ham unumdorlikni oshirish mumkin. Ushbu tadqiqot ishida quyosh chuchutgich qurilmasida kondensatsiyalanish tezligini oshirish hisobiga unumdorlikni oshirishning tо‘rtta usuli taklif etilgan. Ushbu usullar bо‘yicha olib borilgan tadqiqot ishlarining tahlili hamda usullarni unumdorlikka ta’sirlarini qiyosiy natijalari keltirilgan. Ushbu tadqiqot ishida keltirilgan ma’lumotlardan quyosh suv chuchutgich qurilmalarining unumdorligini oshirishda foydalanish mumkin.

#unumdorlik #shо‘r suv #chuchuk suv #quyosh suv chuchutgich #suv sathi #kondensatsiyalanish tezligi

Hozirgi vaqtda bilvosita quyosh quritgichlari qishloq xо‘jalik mahsulotlarini quritishda keng qо‘llaniladi. Quyosh havo kollektori bilvosita quyosh quritgichlarining asosiy jihozlaridan biri bо‘lib, quritgichga uzatilayotgan havoni zarur haroratgacha qizdirib berish uchun xizmat qiladi. Ushbu tadqiqot ishida bilvosita quyosh quritgichi uchun ishlab chiqilgan quyosh havo kollektoridan oqib о‘tayotgan havo haroratini о‘zgarishini aniqlash imkonini beradigan matematik model taklif etilgan va matematik model bо‘yicha olingan nazariy natijalar tajribaviy tadqiqot natijalari bilan yetarlicha mos kelishi asoslangan. Shuningdek yilning may-oktabr oylarining xarakterli kunida о‘tkazilgan tadqiqotlar natijalari va ularni tahlili keltirilgan

#harorat #quyosh radiatsiyasi #quyosh quritgichi #quyosh havo kollektori #havo #issiqlik miqdori

The paper considers the problem of assessing the quality of educational information systems (EIS) in the context of the digital transformation of society. An algorithm for determining the quality of information systems based on expert information is proposed. This approach differs in that it allows one to formalize qualitative assessments of the state of the system using the theory of fuzzy sets. The fuzzy quality assessment models included in the methodology, as well as the algorithms corresponding to them, allow, based on expert data, to assess the quality of educational information systems at the stage of their development, implementation and use. The implementation of the methodology makes it possible to increase the efficiency of the quality management process of educational information systems and the educational process as a whole. The article considers the use of a software package for the analysis and evaluation of the quality of educational information systems. The developed software product implements the following declared functions: assessment of the initial level of quality of the intellectual property; assessment of the possible level of quality of intellectual property in the event of attacks on the information resources of institutions

#educational information system #quality of information systems

It is known that the importance of the modeling method in the research of technological systems is increasing. One of the main reasons for this can be attributed to the possibility of simplifying a complex system, as well as the priority aspects of logical consistency and mathematical laws. At the same time, the development of information technology, computing and artificial intelligence has strengthened the practice of using modeling methods. In other words, the modeling apparatus has a good integration feature with these concepts. In this article, the importance and relevance of the development of optimal control models based on a neural network is presented as the main scientific idea on the example of a closed-loop control system. When the control system is formed as an intelligent system, or when the system description is based on the concepts of an intelligent system, the main parameters of modeling are differentiated. It is theoretically and practically based that the results of modeling gain significance depending on these parameters. The effectiveness of the use of neural network models in the optimal control of the activity of the intelligent system is explained against the background of the possibility of minimizing the control error. It has been scientifically proven that modeling closed systems using neural networks has several advantages. Quantitative parameters that need to be paid attention to in the formation of an intelligent system are researched. Conclusions and proposals are presented on the effectiveness of using neural networks in modeling complex technological systems.

#fuzzy logic #optimization #modeling #intelligent system #fuzzy regulator #system error #neural network

An’anaviy pluglarning tuproqqa ishlov berish sifati agrotexnik talablarga javob bermaydi. Tadqiqotning maqsadi egatsiz tekis shudgorlaydigan plugni ishlab chiqish. Taklif qilingan plug vintsimon qo‘shkorpus, birinchi qator surgirchlar, yo‘naltirgichli orqa vintsimon o‘ng va chap tomonga ag‘daradigan korpuslar va ikkinchi qator surgirchlardan iborat. Egatsiz tekis shudgorlaydigan plugning tajriba nusxasi yasalgan. Ishlab chiqilgan plugning dala sinovlari natijalari keltirilgan. O‘tkazilgan tadqiqotlar natijasiga ko‘ra egatsiz tekis shudgorlaydigan plug belgilangan texnologik ish jarayonni ishonchli bajargan va uning ish ko‘rsatkichlari agrotexnika talablarga to‘liq mos keladi. Bunda mavjud pluglarga nisbatan sarflanadigan yonilg‘i-moylash materiallari 21,26 % ga kamaygan

#korpus #texnologiya #an’anaviy shudgorlash #palaxsa #plug #ochiq egat #egatsiz tekis shudgorlash

Maqolada parabolik quyosh kontsentratori yordamida biomassa va uglevodorodli chiqindilarni geliopiroliz jarayonining harorat rejimlari eksperimental o‘rganilgan. Tajribalar uchun eksperimental parabolik kontsentratorli geliopiroliz qurilmasi yaratilgan va uning geometrik, konstruktiv va issiqlik-texnik xarakteristikalari asoslangan. Shuningdek tajribalar 100÷870 ℃ harorat oralig‘ida polietelin plyonka pirolizida o‘tkazilgan. Turli harorat qiymatlari geliopiroliz qurilmasi reaktorining xarakterli nuqtalarida olingan. Tajribalar shuni ko‘rsatadiki, Qarshi shahri sharoitida organik chiqindilar va biomassa pirolizi uchun kerakli bo‘lgan 300÷500℃ haroratni parabolik kontsentrator yordamida hosil qilish mumkinligi aniqlangan.

#harorat #reaktor #issiqlik miqdori #geliopiroliz #parabolik konsentrator #organic chiqindi #muqobil yoqilg‘i

Maqolada shamol to‘lqinlarining generatsiyasiga statsionar oqim va suv havzasining cheklangan kengligi sezilarli darajada ta’sir qiladigan katta gruntli kanallar sharoitlari uchun shamol to‘lqinlarining generatsiyasi masalasi qarab chiqlgan. To‘lqinlarning balandligi va davrlarini aniqlash uchun bog‘lanishlar olingan.

#shamol to‘lqinlari #generatsiya #barqaror oqim #gruntli kanal #to‘lqin davri

Mahsulotlarning sifati bir qancha ko‘rsatkichlar orqali baholanadi. Bu ko‘rsatkichlarni biz o‘lchash usullari, statistik usul, hisoblash usuli, sotsiologik usul, ekspert usuli kabi usullardan foydalanamiz. Mahsulot sifatini baholashda qo‘llaniladigan yana bir usul borki, har bir iste’molchi undan bevosita foydalanadi. Bu organoleptik baholash usulidir. Bu usulda o‘lchash vositasi rolini insonning sezgi organlari (ko‘zi, qo‘loqlari, ta’m bilish organlari, hid bilish qobiliyati, paypaslab sezishi) bajaradi.Ushbu maqolada mahsulot sifatini baholashda organoleptik usullarning qo‘llanilishi va ahamiyati, organoleptik tahlilning afzalliklari va kamchiliklari haqida ma’lumotlar keltirilgan. Shuningdek mahsulot namunalari ustida o‘tkazilgan organoleptik tahlillar natijalari va xulosalar, mualliflarning takliflari bayon etilgan.

#oziq-ovqat mahsulotlari #organoleptik tahlil #sensorli tahlil #degustatsion tahlil

In this article bright soliton solutions of the generalized nonlinear Schrödinger equation are found with the help of an effective potential, which is found too. The equation accounts second and fourth order dispersion and also third and fifth order nonlinearity of the media. For the obtained solutions their existence and stability regions are determined. The stability regions are verified and confirmed by solving the equation numerically

#dispersion #Nonlinear medium #slowly varying envelope #effective potential #phase portrait

Maqolada tarkibida kislorod bo‘lgan organik qo‘shimchalar olishda, dastlabki reagentlarning optimal nisbatlari va sintez jarayonlarining maqbul sharoitlari aniqlangan. Sintez jarayonlarining reaksiya mexanizmlari va ularning strukturasi IQ-spektroskopiya tahlili orqali tadqiq etilganda, murakkab efirlarga xos C=O karbonil va С-O-С asetat guruhlari uchun mos chastotalarda, IQ-spektrning 756-854 sm-1 sohadagi yutilish cho‘qqisida epoksi guruhning asimmetrik valent tebranishlari namoyon bo‘lgan. Shu bilan birga, sintez qilingan maxsulotning fizik-kimyoviy xossalari tahlil qilingan. Natriy asetat va epixlorgidrinni o‘zaro ta’sirlashtirish orqali organik efir olishda reaksiya unumiga haroratning ta’siri tahlil qilinganda 50-70 0С oralig‘ida reaksiya unumi past ekanligi aniqlandi. Ammo haroratni 100-110 0С haroratda olib borilganda esa unum oshib borganligini kuzatildi. Natriy asetat va epixlorgidrinni 1:1 mol nisbatlardagi reaksiyasi unumiga katalizatorlarning ta’siri tadqiq qilinganda, ionli suyuqlik ishtirokida reaksiya yuqori unumga erishish mumkinligi aniqlandi. Olingan dastlabki natijalarga ko‘ra taklif etilayotgan E-3 markali qo‘shimchalarni hosil qilgan kompozitlari benzinga oktan sonini oshiruvchi qo‘shimcha sifatida foydalanish uchun tavsiya qilingan

#analog #kompozit #neft #IQ-spektroskopiya #organik qo‘shimchalar #oktan soni