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In this paper, a varieties of purification processes are carefully discussed according to three methods of synthesis of diphenyl carbonate.
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摘要本文按合成碳酸二苯酯的三种方法－光气法、酯交换法和氧化羰化法，详细介绍了碳酸二苯酯的提纯工艺。 |
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In this paper, according to organic ligands including polyaminocarboxylates, hydroxycarbolates, alcohols and so on, coordinative environments, patterns of synthesis and structures of complexes as well as other properties about bismuth complexes in solid s
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本文主要根据有机配体的不同，对三价铋离子配合物的合成及相应的结构进行分类概述，并针对固态铋配合物，对铋(Ⅲ)离子在各配合物中所处的配位环境以及与配体的配位方式等进行了综述。 |
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In this paper, according to the characters of river ecosystem, the concept of ecohydrological regime is proposed, and the multi-parameter system of the ecological water requirements (minimum and appropriated ecological water demand, ecological water requi
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本文首先从河流生态系统特性入手，提出生态水文季节，构建了多参数生态需水（最小生态需水、适宜生态需水、洪水期生态需水）体系并分析其内涵，组成了能反映河流生态系统健康的流量等级。 |
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In this paper, according to the periodically active characteristics shown in the historical earthquake data in this region since 1900, we describe the rule of seismicity with sine function and furthermore make a preliminary forecast of the seismicity inte
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摘要根据东北地区1900年以来的历史地震资料所显示的周期性活动特点，用正弦函数描述其地震活动规律，并结合时间序列的周期图及其他一些地震活动性分析方法，对该地区未来1~3年地震活动发展趋势和地震强度作了初步预测。 |
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In this paper, advance in the application of marker-Assisted selection, interspecific hybridization, transgenic technology to select the peanut breeds of resistant to insect pests and diseases, drought-tolerant, quality, short duration high、yield in the f
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总结了近些年来国际上应用分子标记、种间杂交、转基因技术等方法在选育花生抗病虫、抗旱等多抗性及优质、早熟、高产新品种等方面取得的最新进展。 |
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In this paper, advances in the application and research of chitin deacetylase in preparation of chitosan are summarized.
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本文就甲壳素脱乙酰酶在壳聚糖制备中的应用及研究进展作一综述。 |
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In this paper, after analyzing the operation and tests of the air conditioning unit for the rolling stock of Shanghai Metro Line 1 over the last years, a preliminary calculation based on the operation features of the air conditioning unit of the rolling s
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摘要通过对上海地铁一号线车辆空调的多年运行和试验的分析，针对设计中的上海轨道交通明珠线车辆空调的运动特点，对其制冷容量等参数进行了初步的计算和分析。 |
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In this paper, an Internet based software developed to predict the life of zinc coatings is introduced.
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本文介绍一个基于互联网的为预报锌层的寿命而开发的软件。 |
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In this paper, an algorithm for constructing rational spline curve, which was tangent to the given polygon, was described.
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摘要描述了一种与给定多边形相切的有理样条曲线的算法。 |
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In this paper, an analysis of the present conditions of Beijing's female senior citizens based on 0.95% of the primary data from the 2000 Fifth National Population Census shows that the educational level and employment rate of female senior citizens are b
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本文利用2000年第五次人口普查0.95%的原始数据对北京市老年女性的现状进行了分析描述，结果表明，北京市女性老年人的教育程度、在业率低于男性老人，而丧偶率、经济依赖性则较男性老人高。 |
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In this paper, an approach of recovering use case models of multi-process systems is proposed for concurrent object-oriented software systems.
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文章针对具有并发特征的面向对象软件系统提出了一种多进程系统用例模型的逆向生成方法。 |
