reduce porosity 中文意思是什麼
reduce porosity
解釋
減少氣孔-
Inorganic anti - cracking reinforced chemical additive, called wj, generates some tittle expansive crystals in hydration process in concrete to reduce the porosity and improve the distribution of pore size. the expansive power is process in common to tumefaction that petty crystalloid aft suck water and pressure to concrete pores that aft crystal gather volume. its adding weight was 8 % - - 12 % in cement, its restrained expansive ratio was about 0. 02 % - - 0. 06 %, and relevantil brought self - stress 0. 2mpa ?. 6mpa
無機增強抗裂材料wj摻入普通混凝土中，在水化硬化過程中生成一定量的微膨脹結晶體，降低空隙率，改善混凝土中孔結構分佈。其膨脹驅動力是凝膠尺寸的晶體鈣礬石吸水腫脹和結晶狀鈣礬石對孔隙產生膨脹壓的共同作用。當wj摻量為8一12兒在鋼筋和鄰位的限制下，使混凝土產生0 -
Abstract : this article is about two series of borate and phosphate comprising seven directions. the experiment result shows that both of the two gl ass antioxidants can reduce apparent porosity ， raise oxidation resistance and th e crushing strenth after fire ， but lower refractoriness under load. phosphate glas s is superior to borate in refractoriness under load. which c an attain over 1600 ; so the phosphate glass is a d esirable antioxidant
文摘:研究了硼酸鹽和磷酸鹽兩個系列七種配方的玻璃防氧化劑，實驗表明這兩種玻璃防氧化劑均可降低鋁鎂碳磚的氣孔率，提高鋁鎂碳磚的抗氧化能力及燒后的耐壓強度，但也不同程度地降低了鋁鎂磚的高溫荷重軟化變形溫度，其中磷酸鹽玻璃優于硼酸鹽玻璃，其高溫荷重軟化變形溫度可達到1600以上，仍是可取的防氧化劑 -
In this paper, high heat penetration into a moving particulate bed is described mathematically with a comprehensive heat and mass transfer model. the distribution of gas velocity and pressure, the temperature field of gas and solid in the moving particulate bed are examined for different conditions. the results show that thermal penetration into the moving packed - bed particles by fluid flow in porous media is high only in the position near the gas entrance. the thermal penetration thickness tends to increase with the fluid flow velocity and decrease with the particle moving velocity. in the region of thermal penetration, the porosity of solid bed has significant effect on gas field and pressure loss. it is feasible to reduce the gas pressure loss by a larger width / height packed bed in design and operation. the correspondence between thermal infection depth and particle bed height would be helpful to keep high oapacity of reactor and reduce the cost of operation
針對移動顆粒床中物料層內的高溫氣體滲流傳熱現象，考慮滲流與傳熱的相互作用，採用局部非熱平衡假設建立了多孔介質滲流傳熱物理數學模型並進行了數值計算.研究了不同情況下床內填充多孔介質中的流速、氣固溫度和床層壓力損失.計算結果表明，高溫熱氣對移動床顆粒料層的熱滲透主要發生在滲流入口端區域，增大入口滲流速度以及減小床層物料下移速度將導致物料溫度沿床高慢速下降，熱滲透深度擴大，熱滲透作用區域內的物料溫度水平提高.在熱滲透作用區域，孔隙率對流場和壓力損失有很大的影響.研究結果對于移動顆粒床反應器的設計與運行具有一定的參考作用 -
The result indicated that straw mulching could increase soil porosity by 2. 88 % - 5. 76 %, reduce soil bulk density by 1. 86 % - 3. 73 % and the content of soil water with straw mulching was higher than that with no straw mulching treatment ( ck1 ) at different growth stage, improve water - stable aggregate ; and increase soil organic matter, available n, available p, available k, improve soil perviousness and soil retention of water and fertilizer
研究結果表明，與對照ck1 ，相比，秸稈覆蓋可使土壤總孔隙度增加2 . 88 % ~ 5 . 76 % ，土壤容重降低1 . 86 % ~ 3 . 73 % ，並且各生育期覆蓋處理的土城含水量均比對照高，並且秸稈覆蓋還田對促進土壤團粒結構形成具有較大作用，改善了土坡通透性和保水保肥性；同時秸稈覆蓋還田使土壤有機質、全氮、速效氮、速效磷、速效鉀得到明顯提高，從而培肥地力。 -
Microstructure analysis showed that the tungsten carbide particle reinforced steel matrix composites, which were made by electroslag melting and casting method, not only had low content of porosity and nonmetal inclusion, but also could reduce the free carbon content immensely
顯微缺陷分析顯示，採用電冶熔鑄工藝制備的wc鋼復合材料不僅氣孔、夾雜物含量低，無明顯游離石墨痕跡，而且較好地解決了wc顆粒的偏聚問題，具有明顯的質量優勢。 -
The results show that mild melt treatment can improve the bonding strength of coating, but too high temperature and too long retaining time is not suitable ; higher temperature and longer time will result in tin beads separated out from coating surface, affecting surface quality ; melt treatment can reduce the porosity of tin coating, but over 200, the porosity will increase with the rising of temperature
結果表明：軟熔處理會改善鍍層結合力，但溫度和時間不宜過高、過長；軟熔處理的溫度過高和時間過長，表面會析出錫珠，影響表面質量；軟熔處理會降低鍍層的孔隙率，但溫度高於200 ，則孔隙率會隨著溫度的升高而增加。 -
Along with the increase of deepness, to porosity and permeability, mudstone reduce much more than sandstone
隨深度的增加，泥巖孔隙度和滲透率降低的幅度比砂巖大。 -
This paper consists of the following parts : firstly, the physical properties ( particle size distribution, specific area, porosity ratio and pore volume ) and pyrolysis characteristics have been studied in experiments with four kinds of coals. according to experimental results, the advantages of combustion characteristics of micro - pulverized caols are analysed on the theory. secondly, the reconstructing plan is designed in details for a conventional system of the hot air transferring pulverized coal to reduce nox emission
本文主要包括以下內容：首先，通過基礎的實驗分別對四種具有代表性煤種一、三次風所含煤粉的物理特性（粒徑分佈、孔隙率、孔容積和比表面積）和熱解特性進行研究，從理論上分析煤粉細化后，較細顆粒（即三次風含粉）在燃燒特性上的優越性，為三次風含粉用於再燃燃燒打下基礎。 -
The conclusion shows the method fits and the mineral admixture can reduce the pore porosity of concrete and improve the compactibility and freezing resistance of concrete
結論對于混凝土冬季施工更合適未用自然變低溫養護的方法，摻入適量的摻合料能使混凝土孔隙率顯著降低，使混凝土更加密實，提高混凝土的抗凍性。 -
Thus, it is essential to know the movement behavior in resins in order to reduce voids and control porosity content effectively
本文藉助圖像跟蹤和數碼採集照相系統，研究了氣泡體積、樹脂粘度、外壓、樹脂種類和樹脂流動狀態對單個氣泡運動規律的影響。
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