查询词典 selecting

After this research work, we know that: HMCM-22 is a better catalyst of selecting naphthalene alkylation; Surface modification of zeolite Y is effective, but the effect of zeolite 3 is not evident and surface modification doesn"t suits mordenite; Surface modification doesn"t affect the frameworks and inner environments of zeolites, but only reduces diameter of orifice and overlays surface acidities; t-butanol is not suitable for alkylating agent of the reaction using modified zeolites as catalyst; Solvents with smaller molecular size are advantageous for naphthalene alkylation reaction using modified zeolites as catalyst, such as cyclohexane is better than decalin.

通过本论文的研究，我们知道：HMCM-22是萘择形烷基化反应较好的沸石之一；Y沸石的外表面改性效果较好，β沸石则效果不明显，而丝光沸石则不适于外表面改性；外表面改性不改变沸石的骨架结构和孔道内部环境，仅减小孔口直径和覆盖外表面酸性位；叔丁醇不适于作外表面改性沸石催化的反应的烷基化试剂，其反应活性很低，且选择性无明显提升；分子较小的溶剂更适于外表面改性沸石催化的反应，环己烷就明显好于十氢萘。

In this paper w e derived the optimum form of important function by variation method, with that proposed percepts to improve impor tant function; by utilizing the result of delaminateˉ sample theory, the improving direction of reˉsampling was determine d, and with that the double weight selecting partiˉ cle filtering was proposed.

为解决粒子滤波算法在实际应用中出现的滤波发散、粒子退化问题，文中利用变分法证明了重要性函数取法的最优形式，并由此提出重要性函数的改进方案；利用分层抽样原理，确定了重采样方法的改进方向，并由此提出双权重重采样方法。

Based on the studied materials of oil fields and outcrops in the northwestern area of China, selecting the most important oil-bearing rservoirs (fiuvial and deltaic sand bodies) in terrestrial facies lacustrine basin, utilizing the theory and method of sedimentology, this paper explores the key problems, which are the studies of depositional model, heterogeneous model and predictable model, in order to present conductive information for the application of corresponding area and similar reservoirs, simultaneously, to deeply promote the organic combination of theory and practise.

本文根据在我国西部地区油田及露头区研究的资料，选取陆相湖盆沉积体系中重要的油气储层类型—河流和三角洲沉积砂体，以沉积学的原理和方法为基础，对油藏研究中的沉积模型、非均质模型和预测模型等热门研究课题进行研究，以指导相关地区类似油藏或储层的精细描述，从而达到使理论研究和生产实践进一步有机地结合。

Selecting the possible destroyable surface of dam to calculate theoretically them, he discovered that its security coefficient value is bigger than the value which the standard assigns.

选取坝体可能破坏的面进行理论计算，发现其安全系数值大于规范给定的数值，大坝是稳定的。

CENTUM CS-1000 DCS modularization automatic control system and PFCD-S control station are selecting to realize the automatic control of cold blast workshop, desulphuration, sulfur and ammonium and final cooling benzol washing zone etc and to increase the purifying quality and recovery of the coke oven gas.

选用CENTUM CS-1000 DCS模块化自动控制系统，控制站采用PFCD-S型，实现了鼓冷、脱硫、硫铵及终冷洗苯工段等的自动控制，提高了焦炉煤气净化质量和回收率。

That the construction of the preschool curriculum"s contents must be premised that children are made the curriculum subjects ,the construction also must be considered by the two measures of selecting the curriculum knowledge and the construction provisions must be included ;that the activity of preschool curriculum"s teaching and learning must become communication and dialogize between teachers and children .that the performance of preschool curriculum must stress on interest ,games and experience.

学前课程的实施更应强调兴趣、游戏、体验。历史是连续的，明天是昨天和今天的继续。中国学前课程百年的发展与变革所能给予我们的经验、教训及思考将会对当前及今后中国学前课程的发展具有深远的意义。

This article studies mainly the phenomenon of nucleation and growth of calcium sulfate dihydrate crystal,the mechanism of scale fomation is also discussed.The study on this part is helpfoul for developing or selecting more economic and effective scale treatment agents.

本文主要研究了过饱和溶液中二水硫酸钙晶体成核及生长现象，同时对垢的形成机理进行了探讨，针对这方面的研究有助于开发或选择更经济有效的垢处理剂。

The polymerization reacts from the inverse emulsion . Selecting white oil as continuous medium , Span60 and TX-10 as the complex emulsifier , AM-01﹑(NH4)2S2O4 and NaHSO3 as new-type complex initiator , the copolymerization of dimethylamino ethyl acrylate methyl chloride/acrylamide was developed . The effects of the concentration of monomer﹑emulsifier and initiator﹑ temperature﹑reaction time and pH on the molecular weight﹑intrinsic viscostity﹑conversion ratio and cation degree of copolymer were studied .

以反相乳液为初始聚合体系，油酸失水山梨醇酯Span60和辛基酚聚氧乙烯醚TX-10构成复配乳化剂，白油为连续介质，AM-01、过硫酸铵和亚硫酸氢钠组成新型复合引发体系，进行丙烯酰胺/（2-甲基丙烯酰氧乙基）三甲基氯化铵的反相准微乳液共聚合，研究了单体浓度、乳化剂、反应温度、反应时间、pH等因素对聚合产品分子量、特性粘数、转化率及阳离子度的影响。

The influences of the concentration and generation of polyamidoamine dendrimer, the ratio of dodecanoic acid to toluene, and pH in the water phase on the extraction yield of helianthine were systematically studied by selecting helianthine as the guest molecule and electrostatic self-assembled PAMAM as the host.

本文采用低支化树枝状大分子聚酰胺胺与月桂酸进行分子自组装得到了一系列具有稠密的疏水性外围和亲水性内核的自组装大分子，再以自组装大分子为宿主，系统地研究了树枝状大分子聚酰胺胺的浓度、支化代、月桂酸与甲苯的质量比及水相pH值对客体分子甲基橙相转移行为的影响规律。

Selecting forage crops adapted to the climatic and edaphic conditions of specific locations is essential for economic sustainability and environmental protection.

选择饲料作物以适应气候和特定地点的土壤条件是经济持续发展和环境保护的重要课题。

The objective is to subjugate and discourage the people, because that allows the elite to continue to rule unopposed.

其目的是压制和打击人民的积极性，因为这可以让实权派继续统治不会沦为反对派。

GOD,this is the second time you vanquished me!

天啊，这是第二次你打败了我！