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During the preparation of AlOOH sol , Effects of peptizator, H2O/AL,hydrolysis time, hydrolysis temperature, aging time and composition were studied, it had been found that preparation period could be shortened by extending hydrolysis time. It was possibily because that , iso-propanol produced in the reaction could be volatilized when extending hydrolysis time, its harmful role to peptization process could be avoid in this condition.
在制备AlOOH溶胶过程中,系统研究了胶溶剂、H2O/AL、水解温度、水解时间、陈化温度和陈化时间的影响,并首次发现了延长水解时间可以显著缩短制膜周期,通过分析认为延长水解时间可以使反应过程中生成的异丙醇挥发出去,避免了其对胶溶过程的阻碍作用。
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It is found that in the STCC the amplitude of the Rossby wave, corresponding to the SSHA oscillation with period of 70~210 days, increases when the wave propagates westward, and the amplitude is the largest in east of Taiwan. In HLCC, the amplitude of Rossby wave with period of 70~210 days doesn't increase when the wavepropagates westward.
发现在这两支向东的逆流区Rossby波的特性不同:副热带逆流区70~210天周期振荡对应的Rossby波西传过程中增幅,在台湾以东振幅达到最大;而在夏威夷背风逆流区,70~210天周期Rossby波在西传过程中不出现增幅现象。
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It is found that in the STCC the amplitude of the Rossby wave,corresponding to the SSHA oscillation with period of 70~210 days,increases when the wave propagates westward,and the amplitude is the largest in east of Taiwan.In HLCC,the amplitude of Rossby wave with period of 70~210 days doesn't increase when the wave propagates westward.
发现在这两支向东的逆流区Rossby波的特性不同:副热带逆流区70~210 天周期振荡对应的Rossby波西传过程中增幅,在台湾以东振幅达到最大;而在夏威夷背风逆流区,70~210 天周期Rossby波在西传过程中不出现增幅现象。
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Without periodic resource distribution evaluation, the resource supply may not satisfy the demand of emergency. Vulnerability and resource distribution evaluation are also complicated. There are many factors that influence vulnerability and different area has different vulnerability analysis. Besides, as far as the evaluation of resource location and allocation, there are different standards. This dissertation studied three important peoblems.
其中,脆弱性评估和资源布局评估是应急预案评估中的两个重点问题,如果在应急预案制定过程中脆弱性评估不足,则难以找到地区脆弱性所在并加以特殊应对,最终导致因脆弱性较强而损失较大;而在处置过程中出现资源不足或者调度不力等情况则与资源布局关系密切,需要事先确定资源布局并评估其合理性。
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The Dabie Mountains are unique among ultrahigh pressure metamorphic terranes in having the most profound post collisional plutonism The Mesozoic shoshonitic and calc alkaline intrusive rocks can be divided into three groups with different isotopic ages, rock assemblages and chemical features Group I consists of late Triassic (~ 210 Ma) mafic monzodiorites It could have been generated by partial melting of enriched subcontinental lithosphere mantle due to slab breakoff Group II consists ma...
第 I组,主要由晚三叠世(约210 Ma)二长闪长岩辉长岩体组成,它可能是在板片断离过程中富集的大陆岩石圈地幔部分熔融的产物;第I I组,由中侏罗世-早白垩世(160~120 Ma)的角闪石英二长岩、黑云母二长花岗岩和正长花岗岩组成,主要是由幔源岩浆的分离结晶与地壳混染共同作用的产物;第II I组,以白垩纪(125~95 Ma)的花岗岩和花岗斑岩为代表,是在热穹窿作用过程中大别杂岩深熔作用和高度演化的产物。
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This article briefly narrates pitchmen s historical status in urban development process and their present situation overseas , and suggests integrating them into urban design so as to fully display their positive action in constructing humanism city .
该文简述了摊贩在城市发展过程中的历史地位以及目前国外的现状,提出将摊贩融入到设计中去,充分发挥摊贩在构建人性化城市过程中的积极作用。
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Third, we must devote to precipitating the teachers to get psychological pleasure in the process of teaching.
主要包括:一是致力于促使教师从教育教学工作中获得成功的体验;二是致力于促使教师在教育教学过程中获得精神的激励;三是致力于促使教师在教育教学过程中获得心理的愉悦。
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On the basis of nonlinear FEA code ANSYS/LS-DYNA, rail rolling process of universal rolling unit were simulated by 3D large deformation thermal-mechanical coupled elastic-plastic FEM. And the deformation shape of the work piece, deformation parameters and cross dimensions for each pass were obtained and stress,stain distribution and metal flow in rolling process of typical passes were analyzed in detail. Analyzed typical pass stress and strain distribute, rolling stress and deforming in universal pass last groove in detail,discussed the effect regularity of residual stress distribution and size to safely using rail, detailed to expound universal pass to railhead tread circular arc process.
本文基于ANSYS/LS-DYNA非线性显式有限元软件,以60kg/m的重轨为研究对象,采用全三维弹塑性热力耦合的有限元方法研究了重轨在万能轧机组中的变形过程,得到了轧件在孔型中的延伸情况、各道次轧件的变形参数,分析了典型道次的应力、应变分布,并详细分析了全万能成品孔型中轧件受力和变形情况,讨论了残余应力的分布及大小对钢轨安全使用的影响规律,详细地阐述了全万能成品孔型对轨头踏面圆弧的加工过程。
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It briefly introduces the Wiener Process as a most important class in the random process.
在本章中,简要地介绍了Wiener过程作为随机过程中重要的一类,它与其他学科的密切联系,和关于此过程一些已经取得的重要成果,以及与本论文有关的一些工作。
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Many researchers have devoted their work to the development of modal analysis extraction techniques in order to obtain more reliable identification of the modal parameters. There are many damping identification methods, but each one has different merit and defect. In order to find which one is the most reliable method with respect to certain characteristics, this thesis focus on how to identify structure's damping in time domain. The following works have been done in this thesis: 1. Investigate four modal analysis methods——the LSCE Method, the Ibrahim Time Domain Method, the Time Domain Collectivity Modal Parameter Method, the Rational Fraction Polynomial Method and improve on the ITD Method in arithmetic.
本文主要做了如下工作: 1、集中研究了四种常用的模态识别方法,即最小二乘复指数法、Ibrahim时域法、时域总体模态参数辨识法及有理分式多项式法,并对ITD法在算法上进行了一定的改进; 2、建立结构动力模型,利用这四种方法在具体条件下识别结构的阻尼,并绘制相应的图; 3、讨论不同的情况下,不同的识别方法对阻尼识别精确性的影响; 4、基于业已明确的阻尼识别的精确性,根据研究的需要,指出在实际的识别过程中,如何选择最佳的识别方法以及识别过程中需要注意的问题; 5、选择最为精确的阻尼识别方法,以导师李书进教授在日本京都大学防灾研究所强震反应实验室所做的一足尺木制结构房屋的动力测试实验为实测模型,识别其阻尼; 6、在本文的最后,尽作者所知,提出了一些需要改进的地方,并对未来的研究方向给出了作者的建议。
- 推荐网络例句
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This one mode pays close attention to network credence foundation of the businessman very much.
这一模式非常关注商人的网络信用基础。
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Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.
扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。
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There is no differences of cell proliferation vitality between labeled and unlabeled NSCs.
双标记神经干细胞的增殖、分化活力与未标记神经干细胞相比无改变。