relative air content 中文意思是什麼
relative air content
解釋
空氣相對含量-
According to relative criteria, the performance of ash - jd such as ratio of water - reducing, ratio of compressive strength, effect of enhancing strength, ratio of bleeding, air entrainment content, effect of keeping slump value, compatibility with cement, resistance to concrete shrinkage and damage by freezing and thawing and impermeability to water etc are all equal to the traditional aminosulfonic - based superplasticizers, and the ratio of performance to price is better than naphthalene series superplasticizers
按照相關標準，對產品進行了測試，所開發的低成本改性氨基磺酸鹽高效減水劑ash - jd的各項性能如減水率、抗壓強度比、增強效果、引氣性、坍落度保持效果、與水泥適應性、收縮性能、抗凍融性能、抗滲性能等相當于傳統氨基磺酸鹽高效減水劑，性能價格比優于萘系高效減水劑。 -
Controlled atmosphere storage ( ca for short ) is the method to set up a special storage environment with low temperature, proper content of oxygen, carbon dioxide, ethane and relative humidity, through the ways of manual refrigeration and modifying air contents
氣調貯藏是指同時利用人工製冷製造低溫環境和調節氣體介質成分的方法，建立特定適宜的低溫、氧含量、二氧化碳含量、乙烯含量和相對濕度的貯藏環境條件的技術手段。 -
Upper - air relative humidity maps reflect the spatial distribution of moisture content in the atmosphere
高空相對濕度圖，反映大氣中水氣含量的空間分佈。 -
The condensation heat - exchange characteristic of a separate - type heat - pipe was studied on a 1 : 1 model. the heat pipe is heated by electricity, and working fluid is distilled water, and it is cooled by air. the experimental results show that, ( 1 ) when charging liquid ratio is 45 %, condensation heat - exchange coefficient reaches to maxium ; ( 2 ) when there is not non - condensing gas, the coeffcient decreases a little with the increase of vapour pressure, and it decreases by 9. 5 % when the pressure increases from 0. 16mpa to 0. 36mpa ; ( 3 ) when there is non - condensing gas, the coefficient decreases a little, but when the gas is discharged by an exhaust value, it can be improved, when the volume content of the gas is 2. 5 %, it can increased by 22 % ; ( 4 ) the effect of the non - condensing gas on the coefficient decreases with the increase of the pressure, and when the volume content of the gas is 5 % and the pressure increases from 0. 16mpa to 0. 36mpa, the coefficient increases by 6 %. the relative curves are given between condensation heat - exchange coefficient and air flowrate, charging liquid ratio and vapour pressure
建立了空氣冷卻實驗臺，熱管的加熱方式為電加熱，工質為蒸餾水.在1 1模型上對分離式熱管管內凝結換熱特性、不凝性氣體對凝結換熱的影響及不凝性氣體的擴散規律進行了試驗，得出分離式熱管有一最佳充液率，其值為45 %左右；凝結換熱系數隨著蒸汽壓力的增加略有降低，在實驗的壓力范圍內，降低了9 . 5 % ；不凝性氣體對分離式熱管的凝結換熱僅影響冷凝段下部較小部分，通過排氣閥排出不凝性氣體可有效地改善冷凝段下部的凝結換熱；隨著壓力的增加，不凝性氣體對分離式熱管冷凝段的影響減少.這些結論可用於分離式熱管換熱器的工程設計和控制 -
Abstract : the condensation heat - exchange characteristic of a separate - type heat - pipe was studied on a 1 : 1 model. the heat pipe is heated by electricity, and working fluid is distilled water, and it is cooled by air. the experimental results show that, ( 1 ) when charging liquid ratio is 45 %, condensation heat - exchange coefficient reaches to maxium ; ( 2 ) when there is not non - condensing gas, the coeffcient decreases a little with the increase of vapour pressure, and it decreases by 9. 5 % when the pressure increases from 0. 16mpa to 0. 36mpa ; ( 3 ) when there is non - condensing gas, the coefficient decreases a little, but when the gas is discharged by an exhaust value, it can be improved, when the volume content of the gas is 2. 5 %, it can increased by 22 % ; ( 4 ) the effect of the non - condensing gas on the coefficient decreases with the increase of the pressure, and when the volume content of the gas is 5 % and the pressure increases from 0. 16mpa to 0. 36mpa, the coefficient increases by 6 %. the relative curves are given between condensation heat - exchange coefficient and air flowrate, charging liquid ratio and vapour pressure
文摘:建立了空氣冷卻實驗臺，熱管的加熱方式為電加熱，工質為蒸餾水.在1 1模型上對分離式熱管管內凝結換熱特性、不凝性氣體對凝結換熱的影響及不凝性氣體的擴散規律進行了試驗，得出分離式熱管有一最佳充液率，其值為45 %左右；凝結換熱系數隨著蒸汽壓力的增加略有降低，在實驗的壓力范圍內，降低了9 . 5 % ；不凝性氣體對分離式熱管的凝結換熱僅影響冷凝段下部較小部分，通過排氣閥排出不凝性氣體可有效地改善冷凝段下部的凝結換熱；隨著壓力的增加，不凝性氣體對分離式熱管冷凝段的影響減少.這些結論可用於分離式熱管換熱器的工程設計和控制 -
As a result of researches, several water indexes were brought up from different methods, such as soil moisture content and air relative humidity, which were most commonly used in the past irrigation control system. for crop water stress, however, those are all insensitive and indirect indexes that represent the environmental states of crops
在已建立的灌溉自動控制系統中，土壤含水量或大氣相對濕度是最常見的控制農作物灌溉的指標，但對作物缺水而言，這些都是反映作物生長環境的間接指標，對反映作物的缺水比較遲鈍、滯后。
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