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Abstract: The three-way emission control technology and the principle of auto exhaust cat alytic converter are introduced.This article indicates some new requires in the auto materials and manufacture techniques after using catalytic converter.
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文摘:介绍了汽车尾气三元催化净化技术及净化器的主要工作原理，着重指出了三元催化净化技术及净化器的出现给汽车材料和制造技术上带来的一些新要求，提出了清洁环保性能是今后汽车发展的重要方向。 |
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Abstract: The threshold algorithm of the target detection is often used to detect target echo signals.Its performance is based on signals-noise ratio.When signals-noise ratio is great than 6.7,the target can be detected.In order to increase the signals-no
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文摘:目标检测的阈值法经常用于检测目标的回波信号.它的性能取决于信噪比,当信噪比大于6.7时,能够检测出目标.为了提高信噪比,经常采用匹配滤波器.如果系统是窄带系统,噪声为色噪声,无法使用匹配滤波器,不能提高信噪比.激光回波信号的几何特征不同于噪声.提出了一种利用这种几何特征检测目标的算法.当信噪比大于2时,该算法能够检测出目标.该算法已经实际应用. |
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Abstract: The traditional catalyst used in acetal(ketal) synthetic reaction is strong inorganic acid.But there is some limits to its use because of its side reaction,strong erosion and liability to pollute the environment.Molybdophosphoric acid is used as
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文摘:缩醛(酮)合成反应的传统催化剂为无机强酸，但由于副反应多、腐蚀性强和易污染环境等缺点，其使用受到限制.用磷钼酸为催化剂，通过醛(酮)与乙二醇直接反应得到了三种缩合产物.对影响反应的诸因素进行研究,结果表明，用磷钼酸作催化剂，用量小，活性高，产品收率较高，且重复使用性能较好. |
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Abstract: The traditional management pattern of the equipment's outlay under the planning economic system couldn't meet the demands of increasing development .
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文摘:在计划经济体制下形成的传统的设备经费管理模式已越来越不能适应形势发展的需要。 |
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Abstract: The traditional teaching of art asks students to copy without paying attention to the colour languages application so that the student cannot control the colour of art in general.
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文摘:传统的美术教学方法只是让学生无休止地临摹，不重视色彩语言的传授，导致学生无法整体地把握色彩，从而削弱了美术教学的效果。 |
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Abstract: The ultrasonic soldering process of aluminium heat exchangers and a few important factors effecting on the soldering are reviewed.
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文摘:论述了铝热交换器的超声波钎焊工艺及其影响钎焊的几个关键因素。 |
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Abstract: The unique rheology of the lecithin-water s ystem has lead to processing difficulties in the drying of lecithin.
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文摘:水化油脚独特的流体特性导致在浓缩脱水时的困难。 |
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Abstract: The urban commerce of San Francisco has been well-developed thanks to its sound exterior environment and inner drive created by the local government, such as facilitating the transportation network for shopping, developing commercial shopping ce
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摘要：对旧金山政府推动发展交通购物网络商业购物中心、开发旅游变化亮点聚合，努力搭建旅游商业经济架构，为城市商业发展创造了良好的外部环境和内在动力。 |
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Abstract: The urban waterfront region has played an important role in the process of industrial development.
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摘要：城市滨水地带曾经在工业的发展中发挥过巨大的作用。 |
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Abstract: The utilization and the prepartion methods of 2,6-DMN are introduced.The separation and purification processes of 2,6-DMN from coal and petroleum tar are reviewed.
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文摘:本文介绍了2，6-二甲基萘的用途和制备方法；综述了从煤焦油和石油中分离提纯2，6-二甲基萘工艺。 |
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Abstract: The value objective of the construction of CPC at the grass roots level consists of two parts—elementary objective and the advanced objective.
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文摘:基层党组织建设的价值目标可分为基本价值目标和最高价值目标，最高价值目标是培养“四有”新型公民。 |
