Ann Arbor
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[地名] [美国] 安阿伯
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City / 城市
[3852]
Alene · Zwijndrecht · Zuchwil · Zonhoven · Zoetermeer · Zittau · Zell am See · Zelandia · Zaventem · Zaragoza
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Based on the differences between the design value and the survey of the bridge deck elevation in constructing the pre-stressed and so on working condition, the model parameters are identified by ANN, and the beam camber of different sections are given. The results demonstrated that the ANN is efficient and the theoretical results fit well with that of forecasting the beam camber in construction.In this thesis, aim to the beam axis shape be exactitude for design, the internal force of the beam be appeased by design request, the concept of modem cybernetics is applied, At the same time, the effecting parameter has collected. The paper build the ANN model in predicting the beam camber an construction and discuss indetail the extraction of inputting nodes information when quoting the fundamental principle of ANN model and introducing research process of the improved BNN. According to them, ANN is applied in the construction control of prestressed concrete continuous bridge. It is successful for used in the No. 4 bridge of Xiangfan bridge over-crossing Hanriver brideg. To predict the construction camber of by ANN method is useful and effective.
本文以大桥成桥线形满足设计要求和成桥内力控制在设计容许范围内为目的,运用现代控制理论的思想,引用神经网络基本原理,详细介绍BP神经网络的研究过程,从而建立预应力混凝土连续梁桥施工预拱度的神经网络模型,并详细讨论了模型的神经网络结点信息的提取,在工程实例的基础上进行了数值计武汉理工大学硕士学位论文算,数值表明,将神经网络应用于预应力混凝土连续梁桥施工控制,获得了满意的结果,在预应力混凝土连续梁桥施工控制技术研究方面,具有方便有效、精度高的优点,具有良好的应用前景。
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However remarkable impacts were observed in the plantation in terms of community physiognomy,community structure,species composition,species richness,and biomass accumulation.1 Planting trees made community structure simple.Betula alnoidis plantation had three layers including a dominant arbor layer,a complex and well developed shrub layer and a poorly developed vine layer.The arbor layer contained few species and had a single layer.The mountain rain forest had 4 layers including the dominant arbor layer,shrub layer,grass layer and vine layer.The vine layer was well developed and very rich in species composition,and the arbor layer contained as many as 38 species that could be grouped into 3 layers.2 Sequenced by the important value,main species for the plantation and the nature forest were totally different,and the plantation had one dominant species while the nature forest contained many dominant species.3 Planting trees changed the community physiognomy.
但是人工种植西南桦林对群落的季相外貌、群落的结构、物种组成、物种丰富度以及生物量等方面有较大的影响。1人工造林使得群落结构简化,西南桦人工林的层次结构有3层,以乔木层占优势,并且有种类多而发达的灌木层,同时,藤本植物欠发达,但是乔木层树种单一,明显仅有一层;山地雨林的层次结构有4层,以乔木层占优势,还有灌木层、草本层和藤本植物,藤本植物种类多,十分发达;乔木层树种丰富,可达38种,乔木层还可分为3层。2人工造林较大程度地改变了群落的物种组成,根据重要值的大小排列,人工林和天然林的主要物种组成已经完全不同;并且人工林单优树种明显,而天然林就含有较多的优势树种。3人工造林改变了群落的外貌。
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The results indicated that the content of organic matter of the natural meadow and the arbor forest land in the 0-20 cm surface soil grew separately by 36.11% and 32.96%; the nitrogen content of the natural meadow and the arbor forest land was also high, being 66.88 mg/kg and 69.37 mg/kg, respectively; the content of fast-acting potassium in the surface soil was higher than that of meadow ,while the activity of the urea enzyme, alkaline phosphatese and sucrase of the arbor forest land was stronger than that of the other four land utilization modes.
结果表明,天然草地和乔木林地10~20 cm表层土壤有机质增长率均较大,为36.11%和32.96%,二者碱解氮含量也较高,分别为66.88和69.37mg/kg;乔木林地和灌木林地0~20 cm 表层土壤有效磷含量均高于天然草地和人工草地,乔木林地速效钾含量最高。
- 更多网络解释 与Ann Arbor相关的网络解释 [注:此内容来源于网络,仅供参考]
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Ann Arbor:安阿伯
第一篇:2006年5月25日,作者为克莱纳与密歇根大学的约翰.洛特(John Lott)和安.阿伯(Ann Arbor),论文张贴在预印论文网站(arXiv preprint server)上;第二篇:2006年7月25日,作者为摩根和麻省理工学院数学家田刚,
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Ann Arbor:安娜堡
密歇根(Michigan)安娜堡(Ann Arbor)汽车研究中心总裁巴朗(Jay Baron)说:"这一意外举动不仅影响到印第安那(Indiana)格林斯堡(Greensburg)地区和本田在俄亥俄(Ohio)的供应商,还将对整个中西部产生巨大影响.
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Ann Arbor:密歇根大学安娜堡分校
University of Michigan System (MI) 密歇根大学系统 | Ann Arbor 密歇根大学安娜堡分校 | Dearborn 密歇根大学迪尔本分校
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Ann Arbor:安埃布尔
根据"中央社"援引<<纽约时报>>的报道,多处名校所在的城镇,包括哈佛大学所在的波士顿、普林斯顿大学所在的普林斯顿、密西根大学所在的安埃布尔(Ann Arbor)及杜克大学所在的北卡罗来纳州杜拉姆市(Durham)最近都向各大学提出希望他们
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ANN ARBOR AAB:美国安 阿博轴承制造公司
ANDREWS 美国 美国安德鲁斯轴承公司 | ANN ARBOR AAB 美国安 阿博轴承制造公司 | ATB 美国 美国汽车推力轴承公司
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