van n. 范〔男子名〕。 n. 1.(有蓋的)載貨大馬車,搬運車;【鐵路】行李車,有蓋貨車。 2.(吉卜賽人所住的)大篷車;囚車。 a luggage van行李車。 a radio diffusion van廣播車。 a television reporting van流動電視車。 vt. 用車搬運(貨物)。 n. -ner 大棚車車主。 n. 1.【軍事】先鋒,前鋒部隊[艦隊]。 2.先驅,前驅;領袖,領導人(= vanguard)。 in the van of 在…的前列,作為先驅,領導著。 lead the van of 擔任…的先驅。 n. 1.〔古、方〕簸揚器[機]。 2.〔古、詩〕翼。 3.【礦物】洗礦鏟。 vt. 選(礦)。 van4 〔荷蘭語〕= of, from 〔出現于荷蘭人姓名中,表示出生地,亦作 Van〕。
The van allen belts are composed of charged particles trapped by the earth's magnetic field . 范阿倫帶由地球磁場俘獲的帶電粒子所組成。
Van allen radiation belt 范艾倫輻射帶
Van allen belt 范艾倫輻射帶
Van allen belts 范艾倫帶
For this reason , extreme radiation hardness and high power / weight ratio solar cells , which can work properly in van allen belts , must be developed 因此,為了能使通信衛星在vanallen輻射帶正常工作,必須要有一種強抗輻射并且具有較高重量比功率的太陽電池。
Of all the discoveries of the outer atmosphere made possible by rockets and satellites , few equal in lmportance the revelation of the high radiation belts by van allen in 1958 譯為:在所有借助火箭和衛星才能獲得的對外層大氣的發現中,在重要性方面很少能與范艾倫1958年發現高層輻射帶相比。
However , there exist the so - called van allen radiation belts at this hight . the solar cells would work there for only several days , even for ‘ radiation hardness ’ si solar cells 但是,在這個軌道高度上存在所謂vanallen輻射帶,在這里即使是“抗輻射”的si太陽電池也只能正常工作幾天時間。
While the magnetic field on the earth which traps charged particles encircling the earth into radiation belts called the van allen belts normally protects our planet from the solar wind , it may be deformed in the event of violent solar wind , resulting in a geomagnetic storm on earth 雖然地球上的磁場能將環繞地球的帶電荷粒子困于其輻射帶van allen belts ,一般能有效阻擋太陽風,但在猛烈太陽風情況下它可能受影響而變形,導致地磁暴的出現。
While the magnetic field on the earth ( which traps charged particles encircling the earth into radiation belts called the van allen belts ) normally protects our planet from the solar wind , it may be deformed in the event of violent solar wind , resulting in a geomagnetic storm on earth 雖然地球上的磁場能將環繞地球的帶電荷粒子困于其輻射帶( vanallenbelts ) ,一般能有效阻擋太陽風,但在猛烈太陽風情況下它可能受影響而變形,導致地磁暴的出現。
At present , the solar cells used on space aircrafts are still mainly si and gaas solar cells . however , the radiation resistance ability of these two materials is poor . since the photoelectric conversion efficiency attenuates rapidly with the radiation , the lifetime of si and gaas solar cells is short and their stability is not satisfied for space applications at van allen belt 目前國內外用于航天器上的太陽電池主要為si和gaas太陽電池,但這兩種材料的抗輻射能力較差,其光電轉換效率由于高空輻射衰減很快,因而壽命短,穩定性差,不能滿足用于vanallen強輻射帶的空間應用需要。