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Abstract: The preparation conditions of unsaturated polyester (UP) resins modified by PET were introduced in this paper.The copolymerization mechanisms of the synthesis of UP resins from cis-and trans-anhydride were researched.The relationship between the
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文摘:本文研究了由聚酯改性合成不饱和聚酯树脂的反应机理和工艺条件，讨论了改性树脂反应活性与不饱和酸结构之间的关系，解释了顺、反式双键结构对改性树脂固化放热特性和反应活性不同的原因。 |
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Abstract: The preparation conditions,practical properties and some problems relating its application of silver halide dry plate ofhigh contrast for holography are described.
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文摘:本文研究了全息照相用高反差银盐干版的制备条件和使用性能，并就其应用方面的有关问题作了探讨。 |
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Abstract: The preparation of cuprous chloride from etching waste liquor of cupric chloride and crude copper powder was studied.The result showed that this method had many advantages,including simple process,easy operation and good quality of product,there
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文摘:以氯化铜蚀刻液废液、粗铜粉等为原料，在常温下反应制备氯化亚铜，工艺简单，操作简便，产品质量好，具有显著的经济效益和环境效益。 |
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Abstract: The present paper experiments with and models the machinability of structural ceramics by EDM,providing a new method of analysing the machinability of stuctural ceramics by EDM.on certain conditions.
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文摘:对常用结构陶瓷材料的电火花可加工性进行了实验研究和模型化分析，为预测特定条件下结构陶瓷材料的电火花可加工性提供了新的分析方法。 |
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Abstract: The preventing and remedying desertification puts into practice prevention as main,principle of combining ecology protection with Prevensing and remedying,principle of preventing and remedy and economy development and utilization coodinated and
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文摘:沙漠化防治实行预防为主，生态保护与防治结合原则，防治与经济开发利用相协调促进原则；综合防治与分类控制相结合；公众参与和整治者受益结合；对不同责任主体实行不同责任承担原则，由人为不当活动造成的沙漠化治理责任，实行行为者负担原则；对自然作用造成的沙漠化治理实行政府负担为主，受益者合理负担原则；确立统一规划制度；沙漠化状况调查评估与监测预警制度，休耕限耕和扶贫结合制度，禁限制度，优先区域与紧急行动区域制度。 |
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Abstract: The primary analysis of small watershed water and soil loss comprehensive harness, developing ecological economy by using analytic hierarchy fuzzy comprehensive evaluation process was conducted.
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文摘:应用层次分析模糊综合评价法对黑龙江省海沦市光荣小流域水土流失综合治理发展生态经济的效果进行了分析评价。 |
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Abstract: The principal development of the study on chemical conversion of nitrogroup derivatives for the toluene was summarized at first based on this review,Described herewith are reaction mechanisms and effects substituents and concluded four methods a
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文摘:在这篇文章中，首先综述了甲苯硝基衍生物研究的进展，根据这一评论详细地说明了化学转化机理和取代基效应，并对硝基甲苯的选择性氧化进行了简单评述。 |
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Abstract: The principle of cloth bag dust remover using vacuum and back blowing.Model FFL6600I.and application on 12.5 MVA SiFe electric stove are briefly described.The effect and benefit of dust removing are summarized and analyzed.The result is obvious
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文摘:简要介绍了FFL6600I型负压反吹风布袋除尘器的工作原理和在12.5MVA硅铁电炉上的应用等情况，并对其除尘效果和效益进行了分析、总结。 |
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Abstract: The principle of determining parameters of Children High Calcium Milk Powder (CHCMP) by near infrared spectra method is studied.
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资料简介：摘要从化学计量学角度研究了近红外光谱技术测定儿童高钙奶粉理化指标的原理。 |
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Abstract: The principle of optical fiber photometer is analyzed. The problems of light modulation, construction of optical fiber probe, design of photoelectric transform circuit and wavelength switching mechanism are discussed.
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文摘:本文就光纤光度仪的原理和设计中遇到的诸如光纤及光调制，光纤探头结构，光电转换电路设计，波长切换机构等问题进行了分析与讨论。本中提出的方法具有很强的实用性。 |
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Abstract: The principle of reproducing the standard with interference measuring method is presented,the test metrology result has been analyzed and the new calibration system is introduced in this paper.
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文摘:说明使用干涉测量方法复制齿线标准的原理。分析它的实验计量结果；介绍新的检定系统。 |
