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- By adapting Davenport spectrum for horizontally fluctuating wind, wind velocity time history at the opening was simulated by using trigonometric series. 采用Davenport水平脈動(dòng)風(fēng)速譜;利用三角級數對開(kāi)孔處的來(lái)流風(fēng)速時(shí)程進(jìn)行模擬.
- The coronary peak velocity(CPV)and the velocity time integral(VTI)in left anterior descending arterial flow were measured during dipyridamole induced hyperemia under control conditions and each grade of acute AR. 記錄各返流程度的舒張期血流速度峰值 ( CPV)、加速時(shí)間 ( AT)、減速時(shí)間 ( DT)和全心動(dòng)周期的速度時(shí)間積分 ( VTI)及動(dòng)脈舒張壓 ( DBP)。 然后在各種狀態(tài)下經(jīng)股靜脈勻速推注潘生丁 ( 2 .;0 mg/kg);2分鐘推完;記錄各組每分鐘冠脈血流的 CPV和 VTI;
- The peak A velocity(VA), velocity time integral of A-wave(A-VTI), atrial ejection force(AEF) and peak atrial tissue velocity(Va) decreased in day 1 after cardioversion, but gradually recovered with time. 房顫患者除顫后 2 4小時(shí)VA、A -VTI、AEF和Va明顯低于正常 ,隨時(shí)間推移逐漸增高 ,至除顫后 7天時(shí)基本恢復至正常水平。
- Start-up time can be saved by controlling the optimum velocity time of feeding, optimum temperature-rise time of low-pressure converting furnace and adding self-heating balance design. 通過(guò)尋找化工投料的最佳速度、時(shí)間及低變爐最佳升溫時(shí)間,并加設合成塔催化劑的自熱均衡設計等措施,可以節約開(kāi)車(chē)時(shí)間,減少經(jīng)濟損失。
- Fruit juices ferment if they are kept a long time. 果汁若是放置很久，就會(huì )發(fā)酵。
- Time is sometimes called the fourth dimension. 時(shí)間有時(shí)被稱(chēng)為第四度空間。
- I think the work can be completed ahead of time. 我認為這項工作能提前完成。
- He will come on time even though it rains. 即使下雨，他還是會(huì )準時(shí)來(lái)的。
- Reading occupies most of my free time. 閱讀占去了我大部分的閑暇時(shí)間。
- The rate of change of velocity with respect to time. 加速度速度相對于時(shí)間變化的速率
- I need some time to orient my thinking. 我需要一些時(shí)間來(lái)使我的思想適應。
- Gazelles can move with astonishing velocity. 羚羊跑起來(lái)速度驚人。
- A transistorize radio takes no time to warm up. 晶體管收音機不需要預熱時(shí)間。
- Lashing velocity of pump is concerned with nature of air. 泵的抽氣速率與氣體的性質(zhì)有關(guān)。
- At that time he had two helpers. 當時(shí)他有兩個(gè)助手。
- The car was moving at such a velocity! 那輛汽車(chē)的速度簡(jiǎn)直太快了！
- Gazelles can movewith astonishing velocity. 羚羊跑起來(lái)有時(shí)速度驚人。
- I'm sorry to obtrude on you at such a time. 我很抱歉在這個(gè)時(shí)候打擾你。
- The hare darted off with the velocity of a bird. 野兔像鳥(niǎo)一樣快速掠去。
- I referred to my watch for the exact time. 我看了一下手表好知道準確的時(shí)間。
