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Abstract: This paper deals with the sources and harmfulness of environmental radon,analyses the geological background of radon in the urban district of Beijing and some basic measures for preventing and reduciang radon,and emphatically points out that ind
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文摘:论述了环境氡的来源、危害，着重分析了室内氡的主要来源是地基岩石、土壤，分析了北京市区氡的地质背景和防氡与降氡的一些基本措施。 |
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Abstract: This paper deals with the test of Q235 wire through different technologies such as drawing first and hardening second or hardening first and drawing second.
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文摘:对Q235钢盘条，采用先拉拔后淬火或先淬火后拉拔两种工艺方法进行试验。 |
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Abstract: This paper derives thecalculating formulas to the contact strength and oil-film thickness of the involute spur gear according to hydrodynamic lubrication principle.Through check with test,shows that they may rully replace now available Hertz for
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文摘:根据流体动力润滑原理，推导出了渐开线直齿圆柱齿轮接触强度及油膜厚度的计算公式，通过实验验证，说明它们可以完全分别代替现有的赫芝公式及通森公式。 |
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Abstract: This paper describes a laser beam quality analyzer based on CCD, computer and MATLAB. The detailed composition, basic function and characteristics of the software are presented.
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文摘:介绍了利用CCD、计算机并基于MATLAB开发的激光光束质量分析的软件，详细地介绍了该软件的组成、实现的基本功能及其特点。 |
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Abstract: This paper describes a living project example that GD type ESP is applied on slag drier.
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文摘:简述了1个GD型电除尘器在矿渣烘干机上应用的工程实例。 |
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Abstract: This paper describes a new kind of mode field diameter measuring system of single-mode fiber.It adopts reference measuring method introduced by national standard,the far field,scan method.It has high accuracy of measurement,high speed and strong
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文摘:介绍了一种新型的单模光纤模场直径测试系统，它采用国际推荐的基准测试方法——远场扫描法，具有测量精度高、速度快、抗干扰能力强和操作简单的特点，既可用于实验室中，也适合在工厂环境下使用，能够替代同类进口产品。 |
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Abstract: This paper describes a new preparation technique of calcium iodate.At the presence of hydrochloric acid,iodine is oxidated by sodium chlorate,and then reacts with calium hydroxide.A series of constrasted experiments are made on the conditions an
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文摘:介绍了以单质碘为原料，在盐酸存在下，经氯酸钠氧化，再与氢氧化钙进行中和反应制备碘酸钙的方法，并做了最佳工艺条件和不同方法的对比实验.本法具有收率较高、纯度较高、生产成本较低及反应条件易控制、设备简单、操作方便等特点. |
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Abstract: This paper describes an approach to compress medical images loss using second generation wavelets.We list our software simulation results,and compare the method with other compression methods.The comparison shows that this method has great poten
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文摘:研究了第二代小波在医学图象无损压缩中的方法，并在计算机上用软件模拟实现了相应的算法，最后给出院实验结果以及与其他压缩方法的比较，从中可以看出这一新方法在医学图象无损压缩中具有的良好潜力和巨大的应用前景。 |
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Abstract: This paper describes briefly the gist of the data-processing and interpretation system for time domain “mise-a-la masse” method and deals in detail with its field application in two metallic ore districts within Sichuan Province.
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文摘:简要介绍时间域充电法资料处理及解释系统的基本内容，并详细介绍了在四川省境内的2个金属矿区的野外应用结果。 |
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Abstract: This paper describes geodetic instruments progress in 40 years and inquiries about developing prospect of geodetic instruments in our country.
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文摘:阐述了40年来我国大地测量仪器的进展，并探讨了它的发展前景。 |
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Abstract: This paper describes in detail the structural characteristics of the Taiansi-Gangou-Cangping fault macroscopically and microscopically, and distinguishes the fault is the main slip (decollement) plane in the middle and southern sector of the fro
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文摘:泰安寺-干沟-苍坪断裂是龙门山前缘推覆构造带中南段主滑面，文章详细描述了该断裂在宏观和微观上的构造变形特征。 |
