排序方式: 共有19条查询结果,搜索用时 46 毫秒
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水稻田甲烷排放机制及影响因素 总被引:1,自引:0,他引:1
稻田产甲烷菌所产生的甲烷相当一部分被甲烷氧化菌所分解 ,剩余部分主要通过水稻植株释放 ;土壤Eh、土壤类型、施肥种类等均对甲烷排放通量产生影响 相似文献
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A fast edge detection method basing on the combination of fuzzy subsets is developed, in which the detection of an edge as a classification problem will be considered, partitioning the image into two portions: the edge portion and the non-edge portion. The latter one, as the main constituent of an image, consists of the object and its background. Removing the non-edge portion from an image, the remainder is nothing but the edge of this image. As far as the fuzziness of the edge of an image is concerned, some fuzzy operations can be made. In this paper, the gray level histogram is partitioned into several sub-regions, and some operations are performed with the associated fuzzy subsets corresponding to those sub-edges in the sub-regions on the gray-level-square-difference histogrmn, and the edge of this image is finally obtained. Practical examples in this paper illustrate that, the described method is simple and effective to achieve an ideal edge image. 相似文献
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试论电子档案的管理 总被引:2,自引:0,他引:2
陆芳 《科技情报开发与经济》2009,19(20):102-104,108
在总结电子档案特点的基础上,对我国电子档案管理现状进行了评析,并提出了提高电子档案管理水平的若干举措. 相似文献
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陆芳 《大理学院学报:综合版》2012,(2):22-26
以海西省会中心城市福州为例,利用SWOT分析方法分析福州体育产业发展的优势、劣势、机会和威胁,提出充分发挥福州体育产业的优势,抓住机会,克服劣势,规避威胁,促进体育产业科学发展的对策建议。 相似文献
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陆芳 《中国科学技术大学学报》1996,26(3):385-391
讨论了Yokoi猜想例外域的下界,证明了如果例外域的判别式p>10^13,则必有p>^10^3.8×10^7。 相似文献
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仡佬族的宗教信仰属于原始的多神崇拜。他们认为世间万物皆有灵,祭之可得福。明末清初迁移到文山州的仡佬族,他们虽然人口不多,但一直保留着本民族的古老文化。作者在收集第一手材料的基础上,参考有关文献,对这里的仡佬族宗教信仰及文化内涵进行探讨。 相似文献