The article is devoted to the development of a mathematical model of the process of geometric nonlinear deformation of thin magnetoelastic plates of a complex structural shape based on the Hamilton-Ostrogradsky variational principle, and conducting computational experiments. In this case, the three-dimensional mathematical model was transferred to a two-dimensional view using the Kirchhoff-Liav hypothesis. Cauchy's relationship, Hooke's law, Lawrence's force and Maxwell's electromagnetic tensor were used to determine kinetic and potential energy and work done by external forces. The effects of the electromagnetic field on the deformation stress state of the magnetoelastic plate were observed, as a result, a mathematical model was created in the form of a system of differential differential equations with initial and boundary conditions for displacement. To solve the equation, a calculation algorithm was developed using the R-function, Bubnov-Galerkin, Newmark, Gaussian, Gaussian squares, and Iteration number methods. Calculation experiments were carried out in various mechanical states of the magneto-elastic plate, its borders were tightly fixed, one side was hinged and the other side was free, and numerical results were obtained. A comparative analysis of the results of the calculations was presented.
Maqolada sanoat ikkilamchi tashlama gazlarini yuvib tozalovchi qurilmalar ishchi organlarini nazariy tadqiqot etish ishlari keltirilgan. Ishchi suyuqlikni purkovchi mehanizmni jarayonga qo‘llash bo‘yicha tavsiyalar yoritilgan.
Shaxsni tanib olish biometrik texnologiyalari kirish-chiqishni nazorat qilish, bank, ichki ishlar, ta’lim kabi sohalarda keng qo‘llanilmoqda. Amaliyotda esa barmoq izi, yuz tasviri, ko‘z qorachig‘i, kaft va qon tomirlariga asoslangan tanib olish tizimlari keng joriy etilgan. Ishonchli va arzon biometrik tizimlarga bo‘lgan talablar kun sayin ortib bormoqda. Biometrkani har bir yo‘nalishi qo‘llanish sohasiga ko‘ra o‘ziga xos yutuq va kamchiliklarga ega. Hozirgi kunda kaft tasviri asosida shaxsni identifikatsiyalash zamonaviy vositalar hisobiga tez rivojlanmoqda. Bunga undan foydalanish sodda va qulayligi, emotsional betarafligi, faqat kamerani talab qilishi kabilar sabab bo‘lmoqda.
Mazkur maqola kaft tasviri bo‘yicha shaxsni identifikatsiyalash vositalari tadqiqiga bag‘ishlangan bo‘lib, unda kaft tasvirini onlayn olish qurilmalari, ularni yutuq va kamchiliklari, qulayliklari keltirib o‘tilgan.
Hozirgi kunda kontrollerlarning bir necha turlari mavjud bo’lib, Arduino Uno prinsipial jihatdan sodda, foydalanishga qulay hamda hamyonbop bo’lganligi bois boshqa kontrollerlardan ajralib turadi. U boshqa datchiklar bilan, misol tariqasida HC-SR04 datchigi, osongina kommunikatsiya o’rnata oladi. Quyida ularning xarakteristikasi va ko’zoynak uchun ularning potensialini tatqiq etish
The results of the screening for the study of risk factors for the development of cerebrovascular diseases and stroke are presented. When identifying the degree of risk of development, a special questionnaire was used, which included the Fedin outpatient scale, the Mini COG test, and also took into account cholesterol and blood sugar, blood pressure, body mass index, and auscultation of the carotid artery. A low risk of developing CVD and stroke was found in 45%, medium - in 33%, high - in 22% of the examined