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Abstract: Calculation of the module of a 45 pressure angle involute profile for a tapered splined shaft substituting for a delta profile is studied in this article.The formula of calculation is deduced and the influence of unsuitable module on contact zon
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文摘:讨论了锥三角齿花键轴用45°压力角渐开线齿花键轴代替时，如何计算模数的问题，并推导出相应的计算公式，分析了模数选择不当对接触区的影响. |
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Abstract: Carbon dioxide was introduced into the wheat bulk stored in a brick silo through a duct system and was recirculated for even distribution till CO2 concentration to 70 96 in wheat bulk.
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文摘:二氧化碳被导入一管道系统并使其在砖筒仓的粮堆内逐渐均匀分布，直到其在粮堆中的浓度达70％以上。 |
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Abstract: Casting for denture restorative trame needs a high quality of equipment,the complex materials,a degree of difficult technique and the useful art.Thus it has some difficulty of casting sharpeless and drawbacks' caused at work.The mutual relations
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文摘:为解决铸造牙科修复支架过程中因各种原因造成铸件变形或缺陷，着重探讨了因铸造合金的性能与浇注系统对铸件的影响，并就解决铸造变形与缺陷提出了相关解决办法。 |
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Abstract: Catering to the characteristics of a college course—livestock anatomy,histology and embryology and taking one unit of this course as an example the way of developing its CAI courseware script was introduced.
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文摘:针对《家畜解剖学及组织胚胎学》课程的特点，以该课程中的某个单元为例，介绍了用多媒体创作工具来制作该课程CAI课件时脚本的设计方法。 |
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Abstract: Causes for porosity occurrence in welding seams were investigated by means of statistic analysis of the porosity degree of welding seams of the submerged arc weld spiral pipes made with X65 and Q235 steels from different works and mating weld ma
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文摘:通过对不同厂家生产的X65级和Q235钢材与不同的焊接材料相匹配所生产的螺旋埋弧焊管焊缝内的气孔进行统计分析，并从钢材中氧含量的多少及其焊接材料匹配的不同，来研究焊缝中气孔产生的原因。 |
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Abstract: Cellular adhesive molecular is a kind of membrane glycoprotein, which has associations with invasion and metastasis of tumor.
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文摘:细胞粘附分子是一类跨膜糖蛋白、与肿瘤侵袭转移关系密切。 |
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Abstract: Changbaishan Tianchi volcano being one of the most famous volcanoes in the world is an active volcano with the largest scale and potential danger in modern history.
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文摘:长白山天池火山是世界著名的火山之一,是我国规模最大、最具有潜在喷发危险的一座近代活动火山。 |
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Abstract: Change in soil temperature induces the changes in the microbial community composition and their activity; some communities at higher temperatures have the ability to access to or metabolize substrates that are not used by members of the microbia
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文摘:土壤温度变化导致微生物群落组成及其活性产生变化；某些微生物群落成员在较高温度时有能力代谢那些在较低温度时不能被利用的基质；因此，土壤温度上升将影响土壤生态系统中的C、N、S循环。 |
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Abstract: Characteristics of film hole irrigation and effects of irrigation technological parameters on ir-rigating quota are analyzed, and the relationships among discharge per unit width, hole spacing and ir-rigation quota are studied in this paper, bas
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文摘:根据膜孔灌溉大田灌水试验资料，分析了膜孔灌溉特点和灌水技术要素对膜孔灌灌水定额的影响，研究了单宽流量与开孔率与膜孔灌灌水定额的关系。 |
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Abstract: Characterized by vast coverage and extra intensity, soil erosion in the Upper Yangtze River Valley has become an important indicator of the ecological and environmental deterioration in the region.
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文摘:长江上游水土流失面积广，侵蚀强度大，是其生态环境退化的重要标志。 |
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Abstract: Chen Liangshao's epitaph was discovered in 2002 to be possessed by a curio merchant.
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提要：陈良绍墓志于2002年春在古玩商人处发现。 |
