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granular structure 【農業】(土壤的)團粒結構。

granulate

Study on granular structure in laterite vn soil has already been reported in different land use pattern but it is little about soil fertility in karst environment . the better the soil structure , the higher the content of water - stable soil aggregate so there is an osculation correlation between aggregate and structure of soil 不同利用模式下紅壤團粒結構的特征研究己有報道,但關于巖溶環境中土壤變化的研究則很少。土壤團聚體與土壤的結構密切相關,團聚體含量高,則說明土壤結構好。

It showed that 73 % increasing of toughness in modified composites was achieved without the reduction of other mechanical properties . sem has showed the periodically interleaved system where the co - continuously connected granular structure occurs layer by layer between each ply and the interlayer was relatively very thin 電鏡分析表明離位改性的碳纖維單向布周期性增強體系,在每兩層增強體之間都有很薄一層規整的球性兩相結構,正是這個獨特的多層結構使其抗沖擊性能大幅提高,而且不會對其他重要的力學性能產生不利影響。

The results are summarized below : 1 ) study on soil science indicates that soil granular structure is the focus adjuster for soil fertility and it affects the space , water - grasp , aeration and anti - erosion of soil . and the percentage of aggregate is one of the key index that decides the speed and extent of soil erosion , hardening and degeneration because the soil degeneration will first lead to the disappearance of crumb - structure . so it is very important that the physical course and character of soil in different land use pattern are realized 現將主要結果摘要如下: l 、士壤學研究表明,團粒結構是土壤肥力的中心調節器,影響著土壤的空隙性、持水性、通透性和抗蝕性;任何土壤的退化首先將表現出團粒結構的消失;團聚體百分比是決定土壤侵蝕、板結等物理過程速度和幅度的關鍵指標之一,了解不同土地利用和土壤管理方式的物理過程和性質相當重要。

It is found that the nano material is distributed not only among general material grains to form inter - granular structure of the coating but also in the general material grains to form intra - granular structure . micro - crack caused by laser will be eliminated greatly . 3 mechanical performances of the ceramic coating manufactured are tested 得到的結論是經過激光熔覆后的涂層致密化程度有了很大的提高,比單純的激光重熔涂層還高,納米顆粒不僅填充在晶粒之間,而且還嵌入在大晶粒內部,有利于消除激光作用產生的微裂紋。

This model has wide - ranging application and simple computing procedure . it avoids the narrow - ranging limitations of slide line method , as well as avoids the complicated computing procedure in the simulation of the gradual breakdown process for the granular structure by fem . its analysis results are identical with those of the practical engineering , this model has engineering application value 建立了挖掘過程推壓阻力的計算模型,該模型適用面廣、計算較簡便,既避免了滑移線適用面窄的局限性、也避免有限元分析對散體漸近破壞過程模擬的復雜計算過程,計算結果與工程實際吻合,具有工程實用價值。

It is indicated after laser remelting , the density of the nano material infiltrated coating is improved and grain size is decreased greatly . in above researches , it is found that the nano material is distributed among general material grains to form inter - granular structure of the coating 研究發現,在各種涂層中納米顆粒明顯填充在粗顆粒間,構成晶間型組織結構;初步測試還表明,在al _ 2o _ 3 + 13 wt

Granular materials is the object or medium actuated by lots of engineering machinery and bulk solids handling machinery . digging and breakdown of the granular structure is a major actuating mode or objective in granular engineering 散體材料是許多工程機械與散貨裝卸機械的工作對象與工作介質,散體結構的挖掘與破壞是散體工程中的一個主要工作方式與目的。