
| Giải thích VN: Lượng biến đổi nhanh trong thời gian ngắn của điện áp hoặc cường độ dòng điện. |
| Lĩnh vực: xây dựng |
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['impʌls]
o xung, xung lực
§ drive impulse : xung đẩy
§ impulse blaster : máy nổ xung lực
Máy dùng để kích thích một ngòi nổ điện trong thăm dò địa chấn nhằm định hướng chất nổ.
§ impulse factor : hệ số xung
Hệ số dùng trong tính toán tải trọng cần trơn nhẵn, bằng 1 + a. Trong đó a = S. (N)ex2 / 70500, S = chiều dài của cần, N = tốc độ bơm.
Xem thêm: urge, caprice, whim, nerve impulse, pulsation, pulsing, pulse, impulsion, impetus, momentum
impulse noun
1 sudden strong wish
ADJ. strong | irresistible | first, original My first impulse was to run away. | sudden | basic | instinctual, natural | repressed | conflicting, contradictory, contrary | aggressive, violent | creative | sexual
VERB + IMPULSE feel, have She felt a sudden impulse to look to her left. | be subject to We are all subject to aggressive impulses. | be driven by | check, control, deny, fight (back/down), resist, restrain, stifle, suppress He fought down an impulse to scream. | give in to, obey, yield to She gave in to an impulse and took the money. | act on Acting on impulse, he picked up the keys and slipped them into his pocket. | buy sth on Some people will buy a puppy on impulse without any idea of what is involved.
IMPULSE + VERB arise Impulses that are repeatedly denied can arise in other forms.
IMPULSE + NOUN buy, purchase The little black designer dress had been an impulse buy. | buying | buyer
PREP. on (an) ~ On an impulse, I went into the shop and bought a box of chocolates. | ~ towards basic impulses towards things such as food and drink
2 movement of energy
ADJ. electrical, nerve/nervous
VERB + IMPULSE transmit Nerve impulses are transmitted to the brain. | convert sth into, transform sth into Radio waves are converted into electrical impulses.
3 sth that causes sb/sth to do sth
ADJ. positive | political, social
IMPULSE + VERB lead (sb/sth) to sth, prompt (sb/sth to sth) the impulse that prompted economic change
PREP. ~ behind the impulse behind a concept | ~ for the impulse for social reform | ~ toward the political impulses towards joining a trade union
n.
profound religious impulses
he bought it on an impulse
they demonstrated the transmission of impulses from the cortex to the hypothalamus
the pulsations seemed to be coming from a star
the impulse knocked him over
the car's momentum carried it off the road