Logarithmic kav - lub ntsiab xam chav tsev ntawm lub XX xyoo pua

Nyob rau hauv no muaj hnub nyoog ntawm computer technology, feem ntau suav ntawm vim technology yog siab cia li, engineers yuav tsuas nkag mus los ntawm ib tug neeg siv-phooj ywg interface yuav tsum tau tsis.

XX xyoo pua hu ua tej yam txawv. Nws yog tus atomic thiab qhov chaw, thiab cov ntaub ntawv. Aircraft designers zoo tag nrho lub aircraft, thiab lawv muab tawm txawv txawv biplanes nyob rau hauv sai supersonic MiGs, "ua zaim muag" thiab "Phantoms." Giant aircraft muaj thiab submarines pib rau dej das seas thiab oceans ntawm tag nrho cov latitudes. Thaum Los Alamos (New Mexico) kuaj ib atomic foob pob, thiab nyob rau hauv Obninsk nyob ze Moscow, pib muab cov thawj nuclear zog. Foob pob ua ntxaij soared Skyward ...

Yuav ua li cas yog lub atomic foob pob, foob pob ua ntxaij thiab dav hlau aircraft?

Keeb kwm ntaub ntawv qhia tus txheej txheem ntawm kev ua hauj lwm nyob rau hauv cov achievements. Zaum thiab engineers nyob rau hauv dawb lub tsho tiv sawv ntawm daim duab boards, thiab zaum nyob rau ntawm ib lub rooj littered nrog drawings, los ua txoj kev thiab scientific suav rau ntxiv cov cav tov. Tej zaum nyob rau hauv lub ob txhais tes ntawm cov Tupolev, Kurchatov Teller los yog mam li nco dheev tshwm ib tug tshaj plaws tsis paub hais tias mus rau lub niaj hnub tus txiv neej hluas - ib tug swb txoj cai. Duab ntawm cov neeg uas lawv cov hluas twb dhau nyob rau hauv lub postwar xyoo lawm, txoj cai mus txog rau lub 80s, kuj kaw no nemudreny kawm, ntse tau ntau xyoo qhov tswvyim thaum kawm nyob rau hauv lub koom haum los yog kawm tiav lub tsev kawm ntawv. Thiab cov tswv yim sib cav kuj ntseeg nyob rau hauv nws, nyob rau rodnenky.

Nyob rau dab tsi hauv paus yog cov txheej txheem ntawm ib tug logarithmic scale?

Cov ntsiab cai tseem ceeb ntawm no ntoo kwv, ua tib zoo Document tshaj nrog dawb celluloid scale raws li ib tug logarithmic hauv paus, raws li lub npe implies. Ntau precisely, nyob rau hauv ntau logarithm. Tom qab tag nrho, tus neeg twg uas tau qhia advanced lej, paub hais tias lawv sum yog sib npaug zos rau cov logarithm ntawm cov khoom thiab, yog li ntawd, kom ua division los tsiv qhov chaw, yuav xyuas kom meej tias lub npaug (thiab chaw pib lub division), squaring (thiab hauv paus Extract) yuav los ua ib tug yooj yim teeb meem.

Logarithmic kab kuj nrov nyob rau hauv lub XIX xyoo pua, thaum lub ntsiab lub cuab tam rau suav yog tus ib txwm qhab nias. Qhov no invention - ib tug tiag tiag godsend rau lub ces zaum thiab engineers. Tsis ib zaug lawv figured tawm yuav ua li cas yuav siv no ntaus ntawv. Yog xav paub tag nrho cov tricks thiab paub nws tej zaum yuav tag nrho, tshiab kiv cua twb suav mechanism yuav tsum nyeem tshwj xeeb nyiaj, txaus ntim. Tab sis nws yog tsim nyog nws.

Rulers yog sib txawv, txawm puag ncig

Txawm li cas los, lub ntsiab kom zoo dua ntawm uas muaj ib tug logarithmic scale - nws simplicity thiab yog li ntawd muaj kev cia siab. Piv nrog rau lwm txoj kev ntawm kev them nyiaj (raws li ntev raws li muaj yog tsis muaj cov cav laij leb) ua hauj lwm tau nqa tawm sai npaum li cas. Tab sis muaj cov ntsiab lus uas yuav tsum tsis txhob tau overlooked. Yuav tsuas ua suav nrog mantissas, i.e. tag nrho (mus txog cuaj) thiab ib tug fractional ib feem ntawm tus xov tooj, nrog mus txog rau ob (peb, ib tug heev zoo lub zeem muag) decimals. Qhov kev txiav txim ntawm cov zauv uas yuav tsum tau kom nyob rau hauv lub siab. Muaj kuj yog ib drawback. Logarithmic kab ib tug me me, handheld ntaus ntawv tab sis kuj nws yog ib qhov nyuaj rau hu - 30 cm, tom qab tag nrho cov.

Tab sis me me tsis ua ib qho chaw khuam rau nug minds. Rau cov neeg uas vim yog lawv cov kev ua ub no yuav tsum tau suav ntaus ntawv yog yeej ib txwm nrog koj, yog invented los ntawm ib tug compact ntau logarithmic. Dial xub muab nws ib tug resemblance mus rau lub moos, thiab ib co qauv yog kim chronometers cia nws nyob rau hauv nws cov dial. Ntawm cov hoob kawm, tus possibilities ntawm no ntaus ntawv thiab nws cov neeg yog dog dig tsis tau zoo tus coj tsis ntawm lub classical kab, tab sis nws yog ib txwm tau mus nqa nyob rau hauv koj lub hnab tshos. Thiab nws yog ntau aesthetically pleasing saib!