stream n. 1.河流,小河;川,溪。 2.流出,流注;一連串,(人物等的)輩出。 3.(事件等的)連續(xù);(財(cái)富等的)滾滾而來(lái)。 4.趨勢(shì),傾向,潮流。 5.〔英國(guó)〕(一個(gè)年級(jí)學(xué)生中按智力劃分的)班組。 A bridge is being built over the foaming stream. 正在這條怒流滾滾的河上建造一座橋。 The accident delayed a long stream of cars, buses and bicycles. 這一交通事故阻礙了一條汽車、公共汽車和腳踏車的長(zhǎng)流。 a stream of lava 熔巖流。 sun streams 太陽(yáng)光線。 the stream of time [times] 時(shí)代趨勢(shì)。 the stream of popular opinion 輿論趨勢(shì)。 the stream of thought 思潮。 against the stream 逆流;違反時(shí)勢(shì)。 down (the) stream 順流,向下游。 go by in a stream 一連串陸續(xù)通過(guò)。 in streams [a stream] 連續(xù),陸續(xù),接連,川流不息地。 in the stream 在河的中流。 up (the) stream 逆流,向上游。 with the stream 順流;順應(yīng)時(shí)勢(shì)。 vi. 1.流,流動(dòng);(淚等)流出;(光線等)射出。 2.蜂擁而進(jìn),魚貫而行,川流不息地通過(guò)。 3.(旗等)飄揚(yáng),招展;(頭發(fā))飄動(dòng)。 vt. 1.使流,使流出,傾注。 2.使飄揚(yáng);展開(旗幟等)。 3.把(學(xué)生)按智力等分班。 Students are now streaming back to their dormitories. 現(xiàn)在學(xué)生們川流不息地回到宿舍去。 I turned off the light and let the moonlight stream in through the window. 我關(guān)上電燈,讓月光從窗間照射進(jìn)來(lái)。 The flag is streaming in the wind. 旗幟在風(fēng)中飄揚(yáng)。 a streaming cold 流鼻涕淌眼淚的感冒。 a streaming umbrella 淌著雨水的傘。 crowd streaming past 接連不斷走過(guò)的群眾。 Her eyes streamed tears. 她的眼睛流淚。 The honeysuckle was streaming scent. 忍冬花放出香氣。 The school streams pupils into three classes. 學(xué)校按智力把學(xué)生分成三班。 adj. -d 1.=streamline. 2.最新式的。
And then, the cavity flow is simulated, and the streamline and pressure contour at different reynolds number are plotted, the stream function and location of vortex centers are agree well with the previous results, which indicate the incompressible lattice bgk model is reliable 進(jìn)而對(duì)方腔流的速度場(chǎng)和壓力場(chǎng)進(jìn)行了計(jì)算,繪制了不同雷諾數(shù)下的流線圖及壓力等高線圖,得到的回流渦的位置和流函數(shù)的值和現(xiàn)有的數(shù)據(jù)十分吻合,表明本文不可壓格子模型是可靠的。
Relativel ~ ~ matlab language is more powerful than oilier computing language, especially in computation fluid mechanics, it helps to simply draw charts of vortex, stream function, velocity, pressure, and the amount of work can be extremely reduced, and the program coniplving can also be controlled easily 得到空化數(shù)的分布以后,進(jìn)而分析流場(chǎng)內(nèi)空泡的運(yùn)動(dòng)軌跡,最后得到空泡半徑在流場(chǎng)內(nèi)隨壓力的變化關(guān)系曲線,以及在流場(chǎng)內(nèi)空泡半徑沿壓力最小點(diǎn)的分布規(guī)律。
Second, we discuss the influence of environmental referance potential temperture and thermal wind on mesoscale symmetric instability . we find the expression of disturbance stream function and criterion of symmetric instability by analytical method and conclude that change caused by environmental referance potential temperture with height and thermal wind make critical richardson number and disturbance critical half-wave length of symmetric instability larger, that is to say, they benefit the occurance of symmetric instability . third, we study nonlinear perturbation analysis of mesoscale vertical circulation and evolution equation by means of f-plane . non-hydrostatic balance and filiter model 第二,討論了環(huán)境位溫與熱成風(fēng)因子對(duì)中尺度對(duì)稱不穩(wěn)定的影響。運(yùn)用解析的方法求出了擾動(dòng)流函數(shù)的表達(dá)式和對(duì)稱不穩(wěn)定的判據(jù),發(fā)現(xiàn)環(huán)境參考位溫隨高度的變化與熱成風(fēng)因子使得對(duì)稱不穩(wěn)定臨界理查遜數(shù)及擾動(dòng)的臨界半波長(zhǎng)都變大,這有利于對(duì)稱不穩(wěn)定的發(fā)生。第三,采用f平面、非靜力平衡、濾聲波模式,討論了中尺度垂直環(huán)流非線性攝動(dòng)分析及演變方程。
One dimensional equation can be obtained through extending the stream function and forcing term into fourier series, and this equation can be solved by assuming the traveling-wave solution . besides converting the topographies to flat bottom, the transforms also change the distribution of forcing . for subcritical topography, the intensity of 所用的求解方法為將解和強(qiáng)迫項(xiàng)在變換平面內(nèi)進(jìn)行付里葉級(jí)數(shù)展開,得到一維的波動(dòng)方程,通過(guò)設(shè)行波解的方法求解該一維波動(dòng)方程,所有模態(tài)解的疊加即為內(nèi)潮生成問(wèn)題的解。
(6 ) the results of the stream function field of quasi-resonance three waves transforming with time evolving make sure further that the low-frequency oscillation exists in extratropical latitude, which has greater corresponding relationship with the wave oscillation obtained from the combination of the basic flow, the number of three waves and amplitude (6)在準(zhǔn)共振三波流函數(shù)場(chǎng)隨時(shí)間變化的試驗(yàn)結(jié)果中,進(jìn)一步證實(shí)了中高緯大氣存在較好的低頻振蕩,且與相應(yīng)的基流、三波波數(shù)和振幅組合所得的波動(dòng)振蕩有較好的對(duì)應(yīng)關(guān)系。