Selgitus

Miks kaks planeerijat annavad samale autole erineva vastuse

Sama auto, sama sõidutee, sama päev. Üks ütleb kolm peatust ja kuus tundi, teine kaks peatust ja viis. Kumbki ei valeta — nad on eri meelt asjade suhtes, mis on tegelikult ebaselged.

Updated 2 min read 40 citations Evidence strength 3/5

Vaade kiirteele ülesõidusillalt väljasõiduteeramba suunas
Dietmar Rabich · CC BY-SA 4.0 · Wikimedia Commons

Nad eeldavad erinevaid kiirusi

Aerodünaamiline õhutakistus kasvab kiiruse ruuduga ja selle ületamiseks vajalik võimsus kiiruse kuubiga. Vahe 110 km/h ja 130 km/h vahel ei ole seega kahekümneprotsendine erinevus kulus – see on palju suurem. Planeerija, kes eeldab, et sõidate piirkiirusel, ja planeerija, kes eeldab, et jääte sellest pisut allapoole, modelleerivad kahte erinevat sõitu.

Enamik tööriistu lubab seda seadistada, kuid enamik inimesi ei tee seda kunagi. Kui kaks planeerijat on eri meelt ja saate kontrollida ainult üht asja, kontrollige eeldatavat kiirust.

Nad modelleerivad laadimiskõverat erinevalt või mitte üldse

Liitium-ioonaku võtab vastu suurt võimsust madala laetuse taseme juures ja laadimiskiirus väheneb järsult, kui aku täitub [3]. Praktikas tähendab see, et laadimise viimased kakskümmend protsenti võivad võtta niipalju aega kui esimesed viiskümmend, mistõttu optimaalne strateegia on tavaliselt rohkem, aga lühemaid peatusi, mitte vähem ja pikemaid.

Planeerija, mis seda korrektselt modelleerib, koostab marsruudi, mis näib ebaefektiivne – neli peatust kahe asemel –, kuid viib teid ikkagi kiiremini sihtkohta. Planeerija, mis käsitleb laadimist ühtlase kiirusega, koostab korrapärasema plaani, mis on vale.

Nad on eri meelt ilma osas

Külm vähendab kasutatavat sõiduulatust ja aeglustab samal ajal kiirust, millega aku laengut vastu võtab [4]. Mõlemad mõjud toimivad samas suunas, ja pehme ilma kulunormidele ehitatud plaan võib ebaõnnestuda viisil, mida väike veamarginaal ei kata.

See on rida, kus planeerijate vaheline erinevus on kõige olulisema tähtsusega, ja seepärast käsitleb võimekuste tabel ilmastiku modelleerimist esmatähtsa omadusena, mitte lisaboonusena.

Nad on eri meelt selles, kui palju peaksite kartma

Saabumisvaru – kui palju laengut planeerija nõuab, et teil peatusesse jõudmisel veel alles oleks – ei ole füüsikaline suurus. See on põhimõtteline valik. Tööriist, mis on seatud saabuma 10% juures, ja teine, mis on seatud saabuma 20% juures, koostavad identsetest sisenditest sisuliselt erinevad marsruudid, ning kumbki ei ole vale.

Sõiduulatuse ärevus on hästi dokumenteeritud mõjutaja sellele, kuidas juhid tegelikult käituvad, eraldiseisvalt sellest, mida auto suudab [5]. Planeerija, mis lubab seda seadistada, lubab teil hinnastada oma närve, ja see on õige koht, kus see otsus tegelikult peaks olema tehtud.

Mida sellega ette võtta

  • Seadke kiiruse eeldus vastavaks sellele, kuidas te tegelikult sõidate, mitte sellele, mida kavatsete.
  • Külmal päeval planeerige pessimistliku tööriistaga ja käsitlege optimistlikku kui parimat võimalikku stsenaariumit.
  • Usaldage planeerijat, mis pakub rohkem lühemaid peatusi, rohkem kui üht, mis pakub vähem pikemaid.
  • Planeerige uuesti sõidu ajal, mitte alguses. Selleks ajaks on kõik sisendid juba muutunud.
Kolmerealine briti kiirtee, liiklus mõlemas suunas halli taeva all
Klaus with K · CC BY-SA 3.0 · Wikimedia Commons

Seotud lugemine

Selle lehe aluseks olevad tõendid Virnastatud tulpdiagramm, mis näitab sellel leheküljel viidatud 40 publikatsiooni jaotust uuringutüübi kaupa. 40other (40)
40 publikatsiooni, 2012–2026. See on suures osas vaatluslik andmebaas. See saab tõestada, et nähtused esinevad koos; see ei suuda kindlaks teha, kumb põhjustab teist. Allikas: selle lehe oma viidete loetelu allpool.

References

Every citation below links to the original peer-reviewed record on PubMed or via DOI. Nothing here is a substitute for medical advice.

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