查询词典 hum reduction factor

The reason why no iron carbide was detected in the initial stage of the reaction is that carbon formed from methane cracking was consumed by reduction products H〓O.

对反应过程试样及进出口气体成分分析发现，反应前期无碳化铁生成的原因是甲烷裂解析出碳与还原反应产物H〓O反应而消耗。

In this paper, the recent research status on preparing iron carbide and the effects on formation of iron carbide are summarized elaborately, such as reacting temperature, reduction atmosphere, microstructure of raw material, gangue component, depositio...

本文对制备碳化铁的研究现状，以及反应温度、还原气氛、原料微观结构、原料脉石成分、碳沉积、含硫气体等因素对碳化铁生成反应的影响进行了详尽的文献综述。

The pchloroaniline was prepared by catalytic reduction of pchloronitrobenzene with hydrazine in the presence of an iron oxide hydroxide catalyst.

在氢氧化氧铁催化剂存在下水合肼还原对氯硝基苯制备对氯苯胺，结果表明，氢氧化氧铁作为催化剂具有很好的催化活性、选择性和重复使用性。

Preliminary studies of a wetland in south Wales has already indicated that a variety of internal processes (adsorption, dissolution of carbonate, precipitation of iron oxides and microbial sulphate reduction) combine together to provide a high degree of remediation.

初步行动一个洼地的研究在威尔斯南部已经指出多种内在的程序(吸附，碳酸盐的分解，氧化铁和微生物的硫酸盐减少的坠落)一起联合提供一个再调停的高程度了。

However, Mn concentration in flowers of apple trees were lower than that in leaves, and it appeared increasing from flower blooming period to nutrient recycling period. Mn concentration in apple leaves with iron deficiency were lower than that without iron chlorosis, the degree of reduction were the same as iron chlorosis in apple tree, and Fe/Mn ratio increased.

从盛花期到养分回流期，苹果叶片锰含量逐步增加，与正常树相比，缺铁黄化苹果叶片锰含量明显下降，而且与叶片黄化程度加重的趋势一致，同时Fe/Mn比值升高。

Reduction and control of browning in Dangshan pear juice concentrate by ion exchange and absorption technologies were studied.

该文研究离子交换和吸附相结合技术在降低、控制浓缩砀山酥梨汁褐变中的应用。

Asymmetric reduction of prochiral ketone to these chiral alcohol s by active microbe cells is one of the most promising routes.

以4-氯苯乙酮为苯环上含卤素的芳香酮的模型底物，研究了活性酵母细胞在水相体系中催化该类芳香酮不对称还原合成相应手性醇的反应特性。

The asymmetric reduction of prochiral P-oxo ester, aromatic ketone and aliphatic ketone to its corresponding chiral alcohol by yeast cells were studied respectively in this work when ethyl 4-chloro-3-oxobutyrate, acetophenone and 2-octanone were as the model substrates.

本文以4-氯乙酰乙酸乙酯、苯乙酮和2-辛酮分别为β-羰基酯、芳香酮和脂肪酮的模型底物，研究了利用活性酵母细胞催化这三类前手性酮不对称还原合成相应手性醇的反应特性。

This method had been applied to determination of the optical purity of the asymmetric reduction products of prochiral ketones.

拆分方法已应用于潜手性酮不对称还原产物的光学纯度的鉴定，并取得了很好的效果。

The new system has been applied to the asymmetric catalytic reduction of pro ketones .

第一次成功设计、合成了新型的双手性口恶唑硼烷还原体系，并将其应用于前手性酮的不对称还原。

You can snipe the second and third union leaders from this position.

您可以鹬第二和第三工会领袖从这一立场出发。

Aiming at the currently shortage of XML streams quality detecting, this paper proposes a new forecasting method of XML streams quality by least squares support vector machines, which is used the method of XML keys' vector matrix as windows, and vector product wavelet transform to multilevel decompose and refactor the XML streams series, that can fulfill real-time checking demand of XML quality, and ensure constraint, consist- ency and integrality. For even more adapting net load, it proposes a control strategy by weight and adaptive adjustment to ensure XML streams quality.

针对当前XML数据流质量检测存在的不足，提出构建XML键的矢量矩阵作为窗口，利用矢量积小波变换多级分解与重构XML数据流，再结合最小二乘支持向量机对XML数据流质量进行预测的一种方法，满足XML数据流质量重构时实时检测的要求，保证XML数据的约束性、一致性与完整性；为了更好的适应网络负载，采取加权与自适应窗口调整等调度策略充分保证XML数据流的质量检测。