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The degree of hydrogenation of methyl benzoate might be controled by adding the promoters and changing the nano-size of ZnO. For hydrogenation of methyl benzoate to benzaldehyde, the active-structure of a catalyst should be modified to decrease the absorption of benzaldehyde on the surface of it, because benzaldehyde absorbed is hydrogenated easily. Using 30-40％ZnO/γ-Al〓O〓 or Li-30％ZnO/γ-Al〓O〓, a higher selectivity to benzaldehyde is obtained. Hydrogenolysis of methyl benzoate to toluene or benzene is carried out effectively using a catalyst modified. For instance, 45.3％ selectivity to benzene and 100％ conversion of methyl benzoate at 420℃ was obtained over 10％ZnO/MCM-41 with the nano-size particles of ZnO (2.4nm).

也可以通过助催化剂的添加和活性组分的纳米化，并根据苯甲酸甲酯多步加氢反应的特点实行加氢深度的调控：苯甲酸甲酯选择性加氢制苯甲醛中，由于苯甲醛容易进一步加氢，需要对活性结构进行调变，以减弱苯甲醛的吸附，使用30-40％ZnO/γ-Al〓O〓催化剂或Li调变的Li-30％ZnO/γ-Al〓O〓催化剂，可获得较高的苯甲酸甲酯加氢制苯甲醛的活性；采用同样的方式，苯甲酸甲酯选择性氢解为甲苯或苯也获得了较好的结果，如使用ZnO纳米化的10％ZnO/MCM-41催化剂，在420℃，可获得45.3％的苯选择性，苯甲酸甲酯完全转化。

In this article, we adopted polyvinyl-butyral and methyl cellulose as chemical additives, and carried out research about the bond property of modified mortar in masonry of different walling materials. Its established the test and theoretical basis for the application of modified mortar in masonry buildings.

本文主要研究采用聚乙烯醇缩丁醛和甲基纤维素对普通砂浆进行二级改性后，对不同块材的砌体抗剪性能的影响，为改性砂浆在砌体中的应用奠定试验和理论基础。

The above problems are studied in this thesis. First, the implicit NND scheme with mix flux splitting method proposed by Zhang Hanxin that is first order accurate in time and second order in space is modified. The modified scheme keeps the characteristics of fast convergence and is second order accurate both in time and space. It can be capable of simulating the unsteacly flow. Second, the topological method founded by Zhang Hanxin is improved to study the characteristics of vortex near the singular point on its axis and the cross streamlines on the longitudinal section passing the vortex axis. On the basis of topological results, a program which visualises numerical results is made out. It can help us analyse the characteristics of vortex motion.

本文对上述问题做了研究：第一，在数值模拟方面，借助于张涵信提出的NND算法和混合通量法，我们将他建立的时间为一阶、空间为二阶精度的快速隐式算法推广为时间和空间均为二阶精度的算法，这样做保留了原格式收敛快的特点，而且能适用于真实的非定常流态的计算；第二，将张涵信的拓扑分析方法加以推广，研究了涡轴附近及破裂点邻域内流场的空间特征，并以这些拓扑分析结果为指导，研制了一套显示计算结果的软件，这一软件能很好地帮助我们分析流场的计算结果和旋涡演变的特征。

Based on Douglas operators, the modified wide beam propagation is presented and the number dissipate is minimized without nearly increasing the memory and computing time. The method is also more stable and accurate than ordinary WBPM. Finally, A novel wide-angle low-loss dielectric slab waveguide Y branch is presented and analyzed by modified WBPM.

接着，本论文还分析广角BPM差分格式所具有的数值色散来源，并在不增加计算时间和内存的前提下，应用Doglas算子大大地减小数值色散带来的误差，提高了计算精度，提出了改进的WBPM，而且还发现这种方法有具计算稳定的优点。

Through orthogonal test, chrome-free tanning technology of goatskin shoe upper leather with chrome-free tanning agents such as modified glutaraldehyde,modified vegetable tannin and syntans was studied.

采用改性戊二醛、改性栲胶、合成鞣剂等无铬鞣剂，通过正交试验，优化出了多种鞣剂结合鞣制山羊鞋面革的无铬鞣制工艺。

Through the heavy repair practice of pavement on Quzhou section of No.320 State Road,the preparation,mixture design,mixing,transportation,paving,roller process and quality control points of TLA modified asphalt are expatiated on,indicating that TLA modified asphalt has good low-temperature and high-temperature resistance performance.

通过320国道衢州段路面大修的工程实践，阐述TLA改性沥青制备、混合料配合比设计、拌和、运输、摊铺、碾压过程及其质量控制要点，表明TLA改性沥青混合料具有良好的抗低温、高温性能。

After explaining correlation theory and its important features, the rescaled range analysis、modified rescaled range analysis and detrended fluctuation analysis are analysed. As for the drawbacks produced by the rescaled range analysis when faced with short term correlation, a modified rescaled range analysis based on short term correlation model is applied to Shanghai stock market and Shenzhen stock market. The result is explained and compared.

在阐述了分形时间序列的相关理论和重要特征后，对经典重标极差分析法、修正重标极差分析法和趋势消解波动分析法等一维分形分析方法进行了系统分析，针对重标极差分析法对短期相关会产生有偏结果的缺点，给出了一种基于短期相关的改进的重标极差分析法，把各种一维分形分析方法应用于上证综合指数和深圳成分指数序列进行实证分析，并对结果进行了比较和解释。

Poly-aminoanthraquinone modified electrode is more stable, more easily prepared, and can provide higher surface concentration of reactive sites compared with other quinones modified electrode by adsorpsion or doping.

本论文中研究的氨基蒽醌聚合物修饰电极，与其它方法得到的醌类修饰电极比较，具有性质稳定、制备过程简单、活性点位浓度高等优点，而且同时具有类似聚苯胺的长链结构和蒽醌官能团的特性，为制备具有高氧还原催化活性的蒽醌修饰电极的研究提供了新的思路。

However, for the collision processes in He target, a large discrepacy between the CTMC results and experimental measurement is found. As is well known, the microcanonical distributions of bounded electrons in CTMC method is quite different from quantal distributions, we modified the initial microcanonical distribution by using eleven different ionization thresholds of electron bounded in target. With modification, we calculated the collisional process of O~(3+) with He, and the total cross sections of all processess are calculated as a function of the incident energies. The agreement with experiments is improved by the modified distributions.

但由于靶电子的微正则分布与量子分布有很大不同，在计算离子与He靶碰撞时发现结果与实验差距很大，我们基于使用多个系统总能量U值，对初始电子的微正则分布进行了优化，使其更接近于量子力学的径向空间分布，然后计算了O~(3+)与氦原子随入射离子能量变化的各种反应过程截面，发现优化极大地提高了计算精度，特别是我们的模型对于描述单电子、双电子丢失过程非常成功。

Hongrui company can provide various of modified enginnering plastics more than 100 species,including modified PA66,PA6,PP,PBT,PE,ABS,etc.;can provide many types of engineering plastic wares,including slipper,gear,plate,power,bottle,etc.;also can provide many service,including blendenting,mixing color,selecting suitable material,molding,infecting.etc.

目前鸿瑞公司可提供改性工程塑料PA66、PA6、PP、PC、PBT、PE、ABS等七大类百余个品种；可提供工业用尼龙滑块、滑轮、齿轮、板材、粉末、罐瓶等多种工程塑料制品；还可提供塑料粒子及塑料制品的配色、混色、选材、制模、注塑工艺指导等多项技术服务。

Molecular Distillation is a kind of high vacuum distillation method, which is suitable for the separation of high boiling, heat sensitivity and viscidity products.

分子蒸馏技术是一种在高真空条件下进行的连续蒸馏过程，适合于分离高沸点、热敏性及具有生物活性的混合物。

They are to the Noughties what yuppies were to the Eighties .

那在六十年代是时髦的，但在八十年代肯定是过时了