Onega, O n e g o, kulest dar shimoli garbi Qismi evropoii SSSR (dar RASS Karel, va viloyathoi Leningra­du Vologdai RSFSR). Masohat 9,7 hazor kilometr2. Chuquriash ba hisobi miyona 30 metr, joi chuqurtarinash 120 metr; hajmi ob 292 klometr3. Onega dar natijai harakathoi tektoniki ba vujud omada, az tasiri yakhbandihoi …

Operatori Laplas, lapla­sian, d e.l ta-o pe r a tor, D- operator, operatori differen­sialii khattiero guyand, ki funksiyai f(kh|, kh2, …, khya)-i az p tagyiryobanda (Kh|, kh2, …, khp) vobastaro ba funk­siyai Af = muvofiq meguzorad. Dar holati khususi Operatori Laplasro baroi funksiyam dutagyiryobandai f(kh, u) ba shakli zerin menavisand: …

Onicha (Onitscha), shahrest dar Nigeriya, dar sohili chapi daryoi Niger. Aholiash 220 hazor nafar (1975). Uzeli rohhoi shosse. Markazi parvarishi nakhli ravgandeh. Sanoati bofandagi va khurokvori (istehsoli ravgani nakhl) dorad.

Operatori khatti, ba fazohoi khatti umumiyat dodani mafhumi tab- dili khatty. Operatori khattii fazoi E gufta funksiyai G(kh)-ro me­nomand, ki baroi hamai kh muayyan buda, qimathoi on elementhoi fazoi khattii E meboshand va sharti zerinro qone megardonad: G (akh -j- Ru)! = aG(kh) + RG(u), dar on kh va u — …

Onkologiya (az yunoni onkos — jogar, omos va …logiya), yak sohai tibro guyand, ki peshgiri va muolijai bemorihoi omosiro meomuzad. Bemorihoi omosi az qadimulayyom malumand. Malumote, ki dar papirushoi Ebers (1550 to milod) zikr yoftaand, ba in shahodat medihand. Oid ba omosho dar asarhoi Buqrot, Jolinus, Sels, Ibni Sino, Ismoili …

Operatorho dar nazariyai k v a n t i, mafhumi matematikiest, ki dar apparata matematikii mekha­nikai kvanti va nazariyai kvantii maydon istifoda meshavad va baroi ba vektori muayyani holat yo (funk­siyai mavji) V muvofiq guzoshtani digar vektorhoi (funksiyahoi) muayyan khizmat mekunad. Vobastagii bayni Chg va ‘R’ dar shakli A ‘G’ …

Onomastika (az yunoni onomastikds — sanati nomguzori, onoma — nom), 1) yak shubai ilmi zabonshinosiro guyand, ki tarikhi paydoish va tahavvuli ismoi khosro meomu­zad; 2) majmui hama guna ismhoi khos (leksikai onomastiki), onim i ya, ki vobasta ba obekti nombarshavanda ba antroponimho (nomi ashkhos), etnonimho (nomi qavmho, millatho, khalqho), toponimho …

Operatorhoi payvasta, mafhumest dar nazariyai operatorho. Du operatori khattii makhdud T va T* dar fazoi Gilbert payvasta nomida meshavand, agar baroi hamai vektorhoi kh va u-i fazoi Gilbert (N) vobastagii (Gkh, u) = (zs, Tfu) joy doshta boshad, Masalan, agar J J I «■(*. V) I dxdv<+OS a a boshad, …

Onon, daryoest dar Respublikai Khalqii Mongoliya va viloyati Chitai Respublikai Sovetii Federativii Sotsialistii Rossiya. Bo daryoi Ingoda hamroh shuda daryoi Shilka (havzai Amur)-ro tashkil medihad. Tulash 1032 kilometr; masohati havzaash 96200 kilometr2. Az kuhsori Khentey ogoz yofta, dar masofai ziyod dashti balandi hamvorro burida meguzarad. Jazirahoi bisyore do­rad. Manbaash asosan …

Operasionalizm, empirizmi operasionali, talimoti falsafiest oid ba aznavsozii operasionalii zaboni ilm. Operasionalizm vobasta ba muhimtarin kashfiyothoe, ki dar fizikai ibtidoi asri 20 ba amal omada, dar borai sirishti gnoseologii mafhumhoi fiziki, dar bobi munosibati onho ba tachriba va gayra masala bardoshtaand, paydo shudaast. Operasionalizmro P. U. Brijmen solhoi 20 ba …