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Using ethyl cyanoacetate, triethyl orthoformate and methylhydrazine as main raw materials, the herbicide pyrazosulfuron was prepared through the reactions of substitution, amination, cylclization, diazotization and chlorosulfonation.
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摘要以氰乙酸乙酯、原甲酸三乙酯和甲肼等为主要原料，通过取代、胺化、环化、重氮化和氯磺化等反应制得了除草剂吡嘧磺隆原料药。 |
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Using evidence weight method, the authors selected tectonic activities, hydrocarbon abundance and thickness of source rocks, level of reservoir, complexity of reservoir, degree of mineralization of formation water as the evidence layers to evaluate the fa
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摘要利用地质异常研究中的证据权重法，选择构造活动、烃源岩有机质丰度、烃源岩厚度、储层级别、储层复杂程度、盖层发育程度、地层水矿化度作为证据层，对中下扬子北缘下古生界油气成藏有利区带进行了评价。 |
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Using evidence-based medicine as an exemplar, the author identifies ways of closing the prevailing research-practice gapthe failure of organizations and managers to base practices on best available evidence.
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以基于实证的医学为例，作者提出了终止目前普遍存在的“研究和实践脱离”（即组织和管理者未能将实践建立在最好的证据之上）的情况的几种方法。 |
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Using examples from Requiem, consider whether a photojournalist, covering genuine news - as opposed to celebrity stalking - can go too far?
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看一看《安魂曲》中的事例，思考当一名摄影记者在报导真实的新闻时（而不是偷窥名人隐私类的事情）可以毫无底线的报导吗？ |
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Using existing resources of Beijing and Shanghai art bookstores and website (under construction), develop China market for art books.
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能够结合北京和上海书店的资源及公司网站拓展市场. |
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Using experiment results as standardized data, the frequency responses collected by seafloor magnetotelluric measurements can be corrected to produce authentic information about the seafloor field source.
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实验数据可作为标定资料，对海底大地电磁探测的实测信号进行校正后，即可还原出真实的海底场源信息。 |
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Using exploratory and confirmatory factor analysis, the factor structure of the extraversion dimensions has been identified through investigating 1420 subjects; the items were selected and CEQ was developed.
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通过对1420名被试的测查，结合采用探索性因素分析和验证性因素分析确定外向性维度的因素结构界定基本内涵，筛选项目编制外向性量表。 |
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Using extension idea, the paper studies collocation methods for solving boundary value problems, and proves that the linear collocation solution possesses pointwise ultraconvergence with high accuracy.
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摘要研究利用延拓思想求解边值问题的配置算法，并证明了线性配置解本身具有高精度的逐点强超收敛性。 |
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Using extremum statistical method to predict pit corrosion sizes of the pipeline in service and further to evaluate the residual strength of the pipeline has a great significance for controlling accidents of corrosive perforations, guiding pipeline rehabi
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长输管道的腐蚀类型多为均匀腐蚀或点腐蚀，采用极值统计方法对在役管道的点蚀尺寸进行预测，进而评价管道的剩余强度，对于控制管道的腐蚀穿孔事故、指导管道的修复更换、延长管道的使用寿命具有重要意义。 |
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Using factor analysis and cluster analysis to segment consumers into different markets according to their life style, this paper found that the colored TV choice behavior of different market segments were significantly different.
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利用因素分析与集群分析将消费者依生活型态分成不同之市场区隔后，发现各市场区隔对彩视机之选择行为有显着之不同。 |
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Using feature point corresponding technique, artificially select three feature points from the image waiting for mosaic in order to match two images that have piling up area, and then an image mosaicing system is designed and implemented.
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采用特征点匹配的方法，在待匹配的图像上人工选取三个特征点以对两幅有重叠区域的图像进行拼接，并构造一个图像拼接系统。 |
