查询词典 reduction

In range of 300℃～900℃, all the transition metal oxide catalysts could get high ammonia conversion, during the initial stages of the reaction, the SO〓 conversion is relatively low since the catalysts have not been sulfureted, but it increases gradually and attain constant with rising temperature and time continuance,〓 is better than other catalysts in reactivity and elemental sulfur selectivity; XRD indicates that, in the SO〓-SCR process, stable transition metal sulfide is generated which is very important to SO〓 reduction and transition metal sulfide probably is the active phase of catalyst, further the reduction of SO〓 by H〓 to H〓S is the limiting step of all process, then the activity is somewhat related to its lattice oxygen yet not so notable; XPS indicates that little sulfur on surface exists as S〓 in sulfate, showing that TiO〓 could restrain the generation of sulfate.

对于过渡金属氧化物催化剂的研究发现，在300℃～900℃范围内，不同的催化剂均可获得很高的NH〓转化率，反应初期由于催化剂还未硫化，所以SO〓的转化率较低，随着温度升高和反应时间的延续，SO〓的转化率逐渐升高并达到了稳定值；七种过渡金属氧化物中，以〓对于NH〓还原SO〓反应的活性和选择性最好；XRD结果表明在NH〓-SO〓反应后生成了稳定的硫化物相，硫化物对SO〓的还原过程具有重要作用，催化剂的活性相可能是过渡金属硫化物，而且在硫化物催化剂上进行的H〓还原SO〓生成H〓S的反应是整个过程的速率控制步骤，所以催化剂的活性与其自身的晶格氧的氧化还原能力有一定的联系，但关系不明显；XPS结果表明催化剂表面的硫大部分以过渡金属硫化物的形式存在，只生成少量的S〓，说明TiO〓催化剂能够较好的抑制硫酸盐的生成。

The experiments were carried out chemically pure ZnO and reducing agent CO to study the reduction mechanism of the process. And this reduction is important in other metallurgical processes.

为探索其还原过程的规律，首先采用化学纯ZnO进行CO还原实验，研究还原过程的有关规律，这一还原反应也是其它冶金过程中常见的和十分重要的反应。

Chemically pure elemental Al and CuO powder with an Al mass percentage of 20, 35, 57, 70 and 85 were milled respectively. The ball milled powders were analyzed by X-ray diffractometry and differential scanning calorimetry. When the amount of Al was under 20%, the reduction occurred only. When the amount of Al exceeded 20%, besides reduction, the synthesis reaction occurred simultaneously.

对Al含量在20%～85%范围内的Al/CuO进行高能球磨，采用X射线衍射进行物相分析，并对Al含量分别为20%和75%的试验分析了物相随研磨时间的变化，做了差示扫描量热分析，对比研究了固态还原反应与固态复合反应过程的异同。

Papers in the experimental part of our literature considered on the basis of the experimental exploration, and podophyllotoxin intermediates with the structural characteristics of a simple pepper aldehyde as the starting material,α,β-unsaturated carbonyl compounds are selective reduction lithium aluminum hydrogen reduction reaction as the key steps to have the Knoevenagel condensation, peracetic acid epoxy between chlorine and alkaline hydrogen peroxide epoxy, DCC condensation esterification reaction of the three podophyllotoxin intermediates.

论文实验部分我们在综合考虑文献的基础上，经过实验摸索，并结合鬼臼毒素中间体的结构特点以简单的胡椒醛为起始原料，对α，β-不饱和羰基化合物具有选择性还原的锂铝氢还原反应为关键步骤，先后经过Knoevenagel缩合，间氯过氧苯甲酸环氧化，碱性过氧化氢环氧化，DCC缩合酯化等反应合成了3个鬼臼毒素中间体。

The results indicate that the drag reduction and heat transfer reduction of drag-reducing fluid increase with increasing flow velocity and approach the asymptotes, and HTR is greater than DR all the time.

结果表明，减阻流体的减阻率和传热降低率随流速的增大逐渐增大到渐进值，而且传热降低率恒大于减阻率。

Part Ⅰ The Research of Chiral Phosphorus Catalysts in the Enantioselective Borane Reduction of Prochiral Ketones ABSTRACT In this paper, the preparation of varied types of chiral phosphorus ligands and their applications as catalysts in the asymmetric borane reduction of prochiral ketones were investigated.

第一部分对映选择的潜手性酮的硼烷还原反应中手性磷催化剂的研究本文研究了多种不同类型的手性磷配体催化剂的合成及其在酮的不对称硼烷还原反应中的应用。

In the reduction of 1, 6-diphenyl-1, 6-hexanedione catalyzed by the bis-squaryl proline, good enantioselectivities were obtained, the ee values were up to 90%.We also studied the asymmetric borane reduction of prochiral ketone catalyzed by a series of thiazolidine ligands.

本文考察了由L-半胱氨酸衍生的2-位无取代基的以及2-位芳基取代的噻唑烷酸及醇配体在前手性酮的不对称还原反应中的催化性能。

The purpose of this study is to explore the trend of CO2 emission in the electricity industry. An input-output analysis and FGP along with the IPCC method are employed to estimate the volume of CO2 emission produced from power sources in the electricity industry from 1996 to 2006, focusing on the correlation between derived energy and carbon dioxide. The potential volume of CO2 emission in Taiwan between the years 2007 and 2015 is also estimated according to the information on the government's long-term development program. Furthermore, the input-output approach and FGP model is constructed to draft future CO2 reduction program for the electric power industry. The program includes fuel substitute of dynamotors and the promotion of electrical efficiency; at the same time, analysis is made on the correlation between CO2 and GDP in this reduction program.

摘要 研究目的为探讨电力事业中二氧化碳排放趋势，以投入产出分析法及模糊目标规划法搭配IPCC方法，推估1996~2006年间整体产业各能源二氧化碳排放量，重点为次级能源电力与二氧化碳间的关联性，并依据我国长期开发方案所提供资料推估我国2007~2015年间二氧化碳排放量，并进一步建构投入产出模糊规划模型，拟定未来电力事业可行的二氧化碳减量方案，方案包括发电机组燃料替代与电力效率提高两种，并且分析减量方案中产业二氧化碳与GDP两者间的关系。

Analysis indicates that the adjacent channel power is a quadratic function of predistorter efficients. A new optimization method is given which uses the predicted ACP surface to obtain fast convergence and simulation results show that a 20dB reduction in the third IMD and a 10dB reduction in the quatic IMD are achievable.

得出结论为：分析表明功放输出的邻信道功率是预失真器系数的二次函数；利用了新的自适应算法即使用预测的ACP曲面以提供更快的收敛速度；仿真结果表明，3阶产物可获得20dB以上的改善，5阶产物可获得10dB以上的改善。

Hontonpur ECO is a new craft acid reduction-cleaning agent with excellent reduction property in acid bath which can get rid of the unfixed dyes on fabric to obtain high fastnesses.

Hontonpur ECO 是新工艺的酸性还原清洗剂，在酸性浴中具有出色的还原作用，彻底去除织物上未固着的染料，获得高牢度。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。