Video: Dab tsi tsim qhov mining boom hauv California?
2024 Tus sau: Stanley Ellington | [email protected]. Kawg hloov kho: 2023-12-16 00:17
Mining pib hauv California nyob rau xyoo 1800s thaum tsoomfwv Meskas tau txhawb kom sab hnub poob nthuav dav los tshawb xyuas thaj av kom muaj txiaj ntsig zoo. Ranchers, cowboys thiab pioneers nyob rau sab qab teb California nrhiav tau kub nyob rau toj siab sab hnub tuaj ntawm Los Angeles.
Ib yam li ntawd, nws yog nug, dab tsi pib qhov mining boom?
Tag nrho cov nom tswv thiab yeej muaj ntau tus tub qhe pej xeem zoo li ntseeg tias qhov no boom yuav mus ib txhis. Nws pib Nyob rau hauv ib ncig ntawm 2003, thaum tus nqi rau cov khoom xws li hlau ore thiab thee pib nce. Hlau ore ntau lawm tam sim no suav txog li ib feem peb ntawm peb mining export cov khoom.
Ib yam li ntawd, Mining tau hloov pauv sab hnub poob li cas? Mining ua lub luag haujlwm tseem ceeb hauv kev daws teeb meem ntawm Asmeskas Sab hnub poob . Kev thov rau cov zaub mov tau nce siab heev tom qab Tsov Rog Thoob Ntiaj Teb Zaum Ob thaum Tebchaws Meskas tau hloov los ntawm lub tebchaws ua liaj ua teb mus rau lub tebchaws muaj kev lag luam. Mining kuj tau coj mus rau lub tsev railroads txuas rau cov mines mus rau factories rov qab sab hnub tuaj.
Kuj tseem yuav paub, dab tsi yog qhov ua rau thiab cuam tshuam ntawm mining booms nyob rau sab hnub poob?
Cov ua rau ntawm mining booms nyob rau sab hnub poob yog vim o mining (Cov Comstock Lode). Ces muaj yog nyiaj, qho ua rau kev siv nyiaj ntau thiab kev twv txiaj, uas ua rau muaj kev kub ntxhov. Cov neeg nqa phom thiab nyiaj txiag ntau. Cov cov teebmeem ntawm mining booms nyob rau sab hnub poob yog tias railways coj kev lag luam ntau dua.
Dab tsi yog qhov kev txhawb siab loj hauv kev daws teeb meem ntawm West?
Yog vim li cas Txoj Cai Homestead tau dhau qhov kev txhawb siab txav mus thiab nyob rau sab hnub poob thaj chaw tau qhib rau txhua tus neeg Amelikas, lossis cov pej xeem xav tau, thiab ua rau 4 lab tus neeg thov nyob hauv tsev, txawm hais tias 1.6 lab deeds hauv 30 lub xeev tau ua tiav.
Pom zoo:
Dab tsi yog qhov kev sib raug zoo ntawm tag nrho cov khoom tsim tau thiab cov khoom tsim tawm thawj zaug sau qhov sib npaug?
Koj tuaj yeem pom tias koj tus lej nyiaj hauv tuam txhab nyiaj tau txiav txim siab raws li hauv qab no: Koj qhov Net ntau lawm yog sib npaug rau koj qhov Kev Tsim Nyog Tag Nrho Tshem Tawm Tawm, uas yog tib yam li qhov sib npaug saum toj no uas hais txog Net Primary Production (NPP) = Gross Primary Production (GPP) Kev ua pa tawm (R)
Dab tsi txaus ntshai zoo kawg li nws yog qhov peb yuav tsum tau khawb trenches thiab sim cov roj npog qhov ncauj qhov ntswg ntawm no vim muaj kev sib cav nyob hauv lub tebchaws nyob deb ntawm cov neeg uas peb tsis paub dab tsi?
Qhov txaus ntshai npaum li cas, zoo heev, zoo kawg yog tias peb yuav tsum tau khawb trenches thiab sim roj-qhov ncauj qhov ntswg ntawm no vim muaj kev sib cav nyob rau hauv ib lub teb chaws nyob deb ntawm cov neeg uas peb tsis paub dab tsi. Nws zoo nkaus li tseem tsis yooj yim dua tias kev sib cav uas twb tau hais tseg hauv txoj cai yuav tsum yog kev ua tsov rog
Dab tsi yog logistic regression hauv cov ntaub ntawv mining?
Logistic regression yog ib txoj hauv kev txheeb xyuas cov ntaub ntawv siv los kwv yees tus nqi ntawm cov ntaub ntawv raws li kev soj ntsuam ua ntej ntawm cov ntaub ntawv teev tseg. Tus qauv logistic regression kwv yees cov ntaub ntawv sib txawv los ntawm kev txheeb xyuas qhov kev sib raug zoo ntawm ib lossis ntau qhov kev ywj pheej uas twb muaj lawm
Dab tsi yog qhov cuam tshuam ib puag ncig ntawm mining nyiaj?
Mining nyiaj, lossis lwm yam ntxhia feem ntau, tuaj yeem cuam tshuam peb ib puag ncig. Rau ib qho, nws ua rau muaj kev yaig ntau heev. Nws kuj ua rau cov dej hauv av, av thiab dej saum npoo av los ntawm kev siv tshuaj los ntawm cov txheej txheem mining. Tsis tas li ntawd, mining pab tsim cov sinkholes thiab poob ntawm biodiversity
Qhov feem pua ntawm VCT kev nqis peev yuav tsum tau ua hauv cov khoom tsim nyog lossis kev nyab xeeb hauv lub sijhawm tsim nyog?
Cov cai tseem ceeb yog: Tsawg kawg 80% ntawm lawv cov kev nqis peev yuav tsum yog hauv kev nqis peev uas tsim nyog - cov tuam txhab me (ntau tshaj £ 15 lab ntawm cov khoom muaj nqis) uas tsis tau hais los yog pauv ntawm AIM es tsis yog lub lag luam loj. Lawv yuav tsum tau nqis peev hauv cov tuam txhab hauv peb xyoos ntawm kev nce nyiaj tshiab