on position 閉合位置;接通位置; 插入位置; 開動位置; 開位置; 通電位置; 通電狀態(tài);接通位置; 通路位置
position n. 1.位置;方位;地點。 2.處境,情況;狀態(tài),形勢,局面。 3.姿態(tài),姿勢。 4.地位,身份;職位;職務(wù)。 5.態(tài)度,觀點,立場;見解;論點,主張;命題。 6.(音節(jié)中的)元音位置。 7.【軍事】發(fā)射陣地;陣地;戰(zhàn)略要點。 8.【音樂】(左手在提琴指板上的)把位。 the neutral position 【汽車】空擋。 people of position 有身份的人們。 What is the position of the affairs 形勢怎么樣? a directory position (電話)查號臺。 The position was stormed. 陣地遭受猛襲。 position warfare 陣地戰(zhàn)。 a ready position 【軍事】射擊準備姿勢。 be in a position to 在可以…的地位;能夠…。 be in position 在應(yīng)有位置,在適當(dāng)?shù)匚唬瑹o障礙;照規(guī)定姿勢。 be out of position 不在應(yīng)有位置,有障礙;未照規(guī)定姿勢。 get [go] into position 【軍事】進入陣地。 in my position 在我的立場;(對于)像我這樣立場的(人)。 jockey for position 1. (賽馬時)擠其他騎師以占有利位置。 2. 〔比喻〕以(欺詐)手段圖謀私利。 maneuver for position 調(diào)動軍隊爭取有利地位。 put sb. in a false position 使(某人)處于違反原則行事[被誤解]的地位。 presume on one's position 倚仗地位。 take up the position that ... 主張…。 vt. 1.把…放在適當(dāng)位置;規(guī)定…的位置,給…定位。 2.【軍事】屯(兵),駐扎(部隊)。
The bound control is updated when the data source value changes , or the data source position changes 當(dāng)數(shù)據(jù)源值發(fā)生更改或數(shù)據(jù)源位置發(fā)生更改時,將更新綁定控件。
The source position not encompassed in a plane is indispensable to the exact reconstruction and the data redundancy is produced in the exact reconstruction , thus the complexity of the scanning system is increased and the speed of reconstruction is decreased 精確重建的源點軌跡不在同一平面上且有大量的冗余數(shù)據(jù),這樣就增加了掃描系統(tǒng)的復(fù)雜性并降低了重建速度。
Numerical simulation by cfd was carried out to understand the hot current behavior in a tunnel with longitudinal ventilation . it becomes clear that fire source modeling is very important because the hot current behavior is strongly affected by the fire source position and is sensitive to methods in the modeling of the fire source . the flame area which has developed from the fire source is an area of chemical reaction caused by combustion . even if grids in the vicinity of the fire source are made fine , it was difficult to simulate the heat generation area with consideration to this chemical reaction through using a method for setting the heat release rate simply on the fire source surface . therefore , we proposed a method adopting the knowledge on flame shape under the longitudinal ventilation and incorporating it into numerical simulation and it showed a good agreement with the experimental results . it was shown through experiments in a tunnel with longitudinal ventilation that the hot current developed toward the tunnel center downwind from the fire source near a wall . the cause was investigated by numerical simulation and it became clear from the results that the spiral air by the fire plume created a vortex in the crevice between the wall and the plume 運用cfd進行數(shù)字模擬,以了解縱向通風(fēng)隧道內(nèi)熱煙氣流的特性.通過模擬發(fā)現(xiàn)對火源進行模擬非常重要,熱煙氣流特性受火源位置的影響很大,并且對火源模擬方法很敏感.火源生成的火焰區(qū)是燃燒引起的化學(xué)反應(yīng)區(qū)域.即使火源附近的木垛排列完好,也很難在考慮這些化學(xué)反應(yīng)條件下模擬熱生成區(qū)域.建議考慮縱向通風(fēng)隧道內(nèi)火焰形狀并對它進行數(shù)字模擬.模擬結(jié)果與試驗結(jié)果非常吻合.試驗證明,在縱向通風(fēng)隧道內(nèi),熱煙氣流從靠近墻體火源處順風(fēng)向隧道中心蔓延.數(shù)字模擬結(jié)果發(fā)現(xiàn),火災(zāi)羽流造成的螺旋上升空氣會在墻體和羽流之間形成一個渦流區(qū)
Abstract : numerical simulation by cfd was carried out to understand the hot current behavior in a tunnel with longitudinal ventilation . it becomes clear that fire source modeling is very important because the hot current behavior is strongly affected by the fire source position and is sensitive to methods in the modeling of the fire source . the flame area which has developed from the fire source is an area of chemical reaction caused by combustion . even if grids in the vicinity of the fire source are made fine , it was difficult to simulate the heat generation area with consideration to this chemical reaction through using a method for setting the heat release rate simply on the fire source surface . therefore , we proposed a method adopting the knowledge on flame shape under the longitudinal ventilation and incorporating it into numerical simulation and it showed a good agreement with the experimental results . it was shown through experiments in a tunnel with longitudinal ventilation that the hot current developed toward the tunnel center downwind from the fire source near a wall . the cause was investigated by numerical simulation and it became clear from the results that the spiral air by the fire plume created a vortex in the crevice between the wall and the plume 文摘:運用cfd進行數(shù)字模擬,以了解縱向通風(fēng)隧道內(nèi)熱煙氣流的特性.通過模擬發(fā)現(xiàn)對火源進行模擬非常重要,熱煙氣流特性受火源位置的影響很大,并且對火源模擬方法很敏感.火源生成的火焰區(qū)是燃燒引起的化學(xué)反應(yīng)區(qū)域.即使火源附近的木垛排列完好,也很難在考慮這些化學(xué)反應(yīng)條件下模擬熱生成區(qū)域.建議考慮縱向通風(fēng)隧道內(nèi)火焰形狀并對它進行數(shù)字模擬.模擬結(jié)果與試驗結(jié)果非常吻合.試驗證明,在縱向通風(fēng)隧道內(nèi),熱煙氣流從靠近墻體火源處順風(fēng)向隧道中心蔓延.數(shù)字模擬結(jié)果發(fā)現(xiàn),火災(zāi)羽流造成的螺旋上升空氣會在墻體和羽流之間形成一個渦流區(qū)