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本文通过对云南省潞江坝藿香茎、叶、花穗的水分、总灰分、粗蛋白质、粗脂肪、还原糖、微量元素含量进行测定,为潞江坝藿香食用安全性提供理论依据,推动发展特色农产品。结果表明,藿香不同部位的营养成分存在显著差异(p 0.05),其中水分含量:叶花穗茎。总灰分含量:叶花穗茎。粗蛋白质含量:花穗叶茎。粗脂肪含量:花穗叶茎。还原糖含量:叶茎花穗。藿香三个部位的微量元素含量丰富。 相似文献
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常规抽油机改造成旋转驴头抽油机性能测试 总被引:6,自引:3,他引:3
针对我国陆地各主要油田人工开采的现状及常规采油设备存在的问题,提出了对常规抽油机进行增程改造的依据、方案及基本内容,并以CYJ10-3-53HB型常规抽油机改造成CYJ10-4.2-53HF(改)型旋转驴头抽油机为例,介绍了改造机的试制情况。按照GB11649-89《游梁式抽油机》及SY5212—87《游梁式抽油机质量分等》标准,对改造机承载时主要构件的应力、支架晃动度、悬点投影、噪音及电参数等进行了严格测试。测试结果和现场试验表明,改造机不仅具有一定承载能力,使用方便,可靠性高,而且增产、节能效果显著。与常规机相比,日产液量提高12%以上,每吨液成本降低8%以上。 相似文献
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The design of a curb is straight forward. The curb itself provides a conveyance of stormwater, facilitating the movement of water and pollutants from the street into waterways. Pollutants such as sediment, nutrients from lawn fertilizers, bacteria, viruses, pesticides, metals, and petroleum byproducts accumulate on the road surface and are released during storm events, carried to storm drains, and deposited into waterways, often without treatment. Once pollutants enter the waterways they impact the ecosystem and affect water quality. How can discrete standards—like a curb—be leveraged to have larger systemic impacts? The redesign of the curb to perform as a magnet for pollutants can challenge this design standard. During the summer of 2019, the interdisciplinary research team tested alternatives to the standard concrete curb and apron at Ohio State University. The team used an iterative design process to add patterning and crenellations to the face of the curb and apron. Using full scale models to test simulated storm events, the team collected data to evaluate the performance of 21 alternative designs. The results suggest the new combined curb and apron designs can abstract pollutants from roadways before they are detrimental to water bodies and aquatic ecosystems. 相似文献
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模块的划分及组装——基于PRO/E的API系列抽油机模块化设计之三 总被引:2,自引:1,他引:1
根据API抽油机的特点 ,按照其承载能力、装配尺寸及体积 ,将其零部件做了模块划分 ;详细介绍了驴头、游梁、横梁、连杆、曲柄、平衡装置、胶带传动装置、底座、刹车总成、刹车机构、支架、悬绳器、吊绳、减速器和电动机、轴承等模块的具体数量 ;论述了各个模块之间的匹配关系 ,包括支架与底座的匹配 ,曲柄、横梁与减速器的匹配 ,轴承与游梁、连杆的匹配。以C4 5 6— 2 5 6— 12 0型API抽油机为例 ,阐述了API系列抽油机模块组合的全过程。 相似文献
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如果某种分配方式不能使生产商品的人们得到适当的回报,那么这种分配方式或商品最终一定会崩溃。因此,如何扶持弱势群体,避免社会财富过于集中,是拉动内需、建设市场经济、维护社会稳定的关键考量。 相似文献
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