預分餾 的英文怎麼說
中文拼音 [yùfēnliù]
預分餾
英文
prefrationation-
The text lays particular emphasis on the evaluation of the groundwater, involves the groundwater type, groundwater chemical characteristics, the amount of the water resource and the natural groundwater amount by using the method of numerical model after the calculation of the parameters, such as transmissivity, the coefficient of the flexible water release, with the data of the pumping test in the research zone
採用visualmodflow地下水軟體進行數學模型的求解。在地下水流數學模型識別和驗證后，設計了兩種方案進行了地下水的預報。應用同位素分餾原理和質量守恆定律，確定不同含水層中地下水的成因及形成條件，建立本研究區地下水系統的水循環模式;採用模糊綜合評價方法對研究區內的水質進行了評價。The results indicated : the mechanical properties of pu prepared by added eg in a two - step process in prepolymerization technology were better than that of one - step process, its tg shifted 6 towards high temperatures ; the tan peak of pu material at low temperature disappeared through decompress boiling distilling technology
結果表明，採用預聚體工藝並且分步加入eg所制備的聚氨酯彈性體具有較好的力學性能，玻璃化溫度向高溫方向偏移了6 ；採用減壓共沸蒸餾工藝制備的聚氨酯材料在低溫區的tan峰消失。Secondly, in the fifth chapter, it introduces cimcs apply in oilcan control system in yangzi petro corp, and control system in nanjing oriental chemical technology. in the sixth chapter, it introduces the predictive control arithmetic based on rbf neural network and bp neural network, applying in the rectified column of ethylene, and the result is offered
在第五章里主要研究了計算機管控一體化技術在揚子石化實時信息系統和東方化工有限公司管控系統的應用和相關軟體的開發；在第六章里針對乙烯精餾塔塔頂和塔底產品成分的預測控制，研究比較了基於徑向基神經網路和bp改進演算法的預測控制演算法，並給出了相應的結果。
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