aggregate field 中文意思是什麼
aggregate field
解釋
匯總數據區域-
They are jinfo mountain in nanchuan county ( natural protection section ), wuling mountain in qianjiang county ( national emphases forest demonstration county which forest cover rate is beyond 50 % ) and zhongliang mountain in beibei county ( artificial destruction is very grave ). some main land use patterns i. e. woodland, garden, infield, abandon infield, shrub and grassplot are selected in those three sample sites. four aspects on soil fertility index of karst environment under different land use patterns in these three sample sites, are revealed in this paper, by using the field test, indoor measure and analysis, outdoor experiment and field investigation, and the knowledge and technique of soil, ecology, physics and chemistry etc. they are physical characteristic ( effective soil thickness, organic layer thickness, soil texture, water - stable aggregate and soil water etc. ), chemical fertility ( organism, omni - n, omni - p, omni - k, alkali - nitrogen, available p, available k and rapid available k etc. ), soil animalcule ( bacteria, fungi, actinomyces and their grosses ) and soil - seed - pool ( plant community diversity index ) in karst ecosystem
本研究以重慶市的南川金佛山（自然保護區） 、黔江武陵山（國家重點退耕還林示範縣，森林覆蓋率50以上）和北碚中梁山（遭人為破壞嚴重）典型巖溶區為對象，選擇了幾種重要的利用方式，包括林地、果園、耕地、棄耕地和灌草坡，採用野外巖溶生態調查和室內試驗測量分析相結合的方法，以不同土地利用方式巖溶土壤肥力為重點，對不同土地利用方式土壤肥力特徵進行量化分析，找出巖溶土壤肥力差異的主要方面及其根本原因，論文主要從土壤剖面物理退化指標（有效土層厚度、有機質層厚度、質地、團聚體、水分含量等） ，化學肥力退化指標（有機質、全n 、全p 、全k 、堿解n 、速效p和速效k等） ，樣地土壤微生物指標（細菌、真菌、放線菌數量及總量）以及樣地土壤種子庫植物群落多樣性等4個方面對重慶典型巖溶區的土壤肥力特徵進行了較為詳細的分析研究，為巖溶地區士壤資源的合理利用及結構的調控管理提供依據。 -
There is an old saying in our field - " no dam is not crackable ". the crack is mainly because of the bad dilation after " alkali - aggregate reaction ", the temperature traverse inside and outside the concrete with the happening of heat evolution and the shrink of volume due to the cooling of concrete
水電行業有句「無壩不裂」的俗話，產生裂縫的原因主要有「堿集料反應」造成的破壞性膨脹，水泥水化過程中放出的熱量出現的混凝土內外溫度梯度和水泥石硬化後由於後期降溫發生的體積收縮等造成。 -
These particles will aggregate into a certain structure when the applied field yields a critical value. the other is fabricated from " half - metallic " oxides, i. e., ferromagnetic oxides which are predicted theoretically to be completely spin - polarized and really found experimentally to have very high spin - polarization. when a magnetic field is applied to half - metallic granular systems, the resistance will drop rapid and dramatically, which is called the extrinsic magnetoresistance effects in half - metallic granular systems
在磁性材料中，亦有由在理論上具有完全的自旋極化率、在實驗中也被證實具有高自旋極化率的一系列半金屬氧化物材料構成的多晶、粉末等顆粒體系，被發現能在外磁場下發生顯著的電阻下降，即半金屬氧化物顆粒體系中的外稟磁電阻效應。 -
Study on field test of rock - soil aggregate on right bank of longpan in tiger - leaping gorge area
虎跳峽龍蟠右岸土石混合體野外試驗研究 -
Extraction tests were conducted on asphalt concrete specimens sampled from field roads. asphalt concrete and aggregate gradation were compared to design and acceptance specifications
對實際路面取樣進行了抽提試驗並與規范進行了比較分析。 -
Parametric study indicates that steel thickness has small influence on the temperature field of cfst arch rib during construction, while diameter of tube has great influence. the thermal conductive coefficient of concrete has some influence on the temperature field ; but for the concrete with same aggregate, the coefficient varies in small range, so its influence is limited
應用通用程序對混凝土硬化過程中截面溫度場的分析表明:鋼管壁厚影響較小，而管徑的影響較大;混凝土導熱系數對截面溫度場有一定的影響，但對于同一種骨料的混凝土，其影響不大。 -
In chapter 2, by defining some concepts, such as constraint unit, constraint aggregate, constraint relation, constraint method, constraint chain, constraint degree and associate constraint sub _ aggregate etc. the basic constraint factors that affect the complex pipeline system packing are fully analyzed in the first. in the following, a mathematical modelling method used for complex pipeline system " optimization packing design is brought forth based on the optimization target decomposing, then a mode of generalized proposal field of the complex pipeline system packing design is constructed. finally, a variant genetic algorithm for the solution of the mode mentioned above is derived
第二章，通過定義約束元、約束集、約束關系、約束方法、約束鏈、約束度、關聯約束子集等概念，對影響復雜管線系統規劃布置的基本約束因素進行了較為全面、系統的分析；探討了基於目標分解的復雜管線系統優化布置問題的數學描述方法，建立了面向復雜管線系統布置的廣義布置方案場模型，並在此基礎上設計了求解該模型的變異遺傳演算法。 -
According to the demands of sustainable development of construction field, the performance of recycled coarse aggregate concrete, produced with crushed waste concrete, one of the most of waste building materials, was studied in systemly in this paper
根據可持續發展對建築業的要求，本文對建築材料廢棄物排放量最大者之一? ?廢棄混凝土破碎后所配再生粗骨料混凝土的性能進行了系統的研究。 -
I. the study of ground states in monodisperse and polydisperse electrorheological fluids upon the application of an external field, the suspended particles in an er fluid aggregate in a certain structure
單一分佈（ monodisperse ）和多分佈（ polydisperse ） er流體的基態結構如上所述， er流體的主要特徵，表現在外加電場后，體系中的顆粒會聚集成一定的結構。 -
Our contribution to the documents is the introduction of jones - threshold model, a new research measure, to this field the combination of traditional aggregate accruals model and prior earnings distribution approach shows the advantages of prior distribution approach while more accurate and persuasive
比動仇、廠段等?一十l照，冀圖收「比較出真知」之效。遺憾的是，盡管本文建立的新模型在美囚卜巾公司的分 -
Research results indicate that aggregate gradation extracted from field samples are out of gradation bounds specified in the design file, which can be one of the contributing factors in the development of pavement distress, especially premature failure
研究結果表面瀝青混合料的級配超出設計范圍可能是影響路面長期性能並呈現早期破壞的原因之一。 -
If you are not grouping data because you have only one field in the category group, you do not need to use an aggregate field in the value group
如果因為類別組中只有一個欄位而沒有對數據進行分組，則不需要在值組中使用聚合欄位。
分享友人