aggregate vt. 1.集合,(使)聚集。 2.总计,共计,合计。 The sum will aggregate a thousand dollars. 总额共计一千元。 adj. 1.聚合的;(花)聚生的。 2.【地质学;地理学】聚成岩的。 3.合计的,总。 an aggregate flower 聚生花。 n. 1.聚集,集合。 2.总数。 3.聚集体;凝聚体;团粒。 4.【建筑】混凝料。 in the aggregate 总计,合计。
Random aggregate structure of mesoscopic concrete and finite element mesh 混凝土细观随机骨料结构与有限元网格剖分
The aggregate density of rod - aggregate structure is also calculated on the basis of a common presumption 在线性假设条件下,利用此判据进行的理论分析与实验结果吻合。
The analysis of ir spectrum and melt flow index showed that the composite had a micro - crosslinking structure , and the analysis of dsc discovered there was - spherulite in the aggregate structure of the composite of pp 红外光谱分析和熔体质量流动速率的测定表明,复合材料体系产生了微交联; dsc分析发现, pp材料的聚集态结构中含有球晶。
A new type of structure of the solid - stale displacement reactions which named spiral - mtergrowth - aggregate structure was discovered in the mo2c - si diffusion couple and was considered as the result of spinodal - decomposition continuous phase - transformation 昆明理工大学博士学位论文2002 . 5摘要6 .初步发现了一种新的固态置换反应形貌结构:螺旋共生束集型结构。
3 . the multiwalled carbon nanotube ( mwcnt ) bonded by 2 , 9 , 16 , 23 - tetra amino manganese phthalocyanine ( tamnpc ) was obtained and both its chemical and aggregated structures were characterized by means of ftir , uv - vis , tem , and xrd 3 .成功合成了以化学键合方式连接的四氨基酞著锰一碳纳米管分子内复合光电导材料体系,并用ftir 、 uv - vis 、 tem和xrd等手段表征了其化学结构和聚集态结构。
In the paper , concrete is taken as three phases composites consisting of aggregate matrix and bond between matrix and aggregate on meso - level . using monte - carlo method , the positions of the aggregate structures are generated . mesh is projected on them , different material properties are assigned to the respective elements according to element location in individual phase 应用蒙特卡罗方法,在平面上随机地确定骨料的位置,产生出随机骨料结构,并进行网格自动剖分,根据其空间位置确定各单元所属的相,分配相应的材料特性给相应的单元,用以代表骨料、砂浆及两者之间的过渡层。
At first , ploygon aggregate structure of concrete is randomly generated in two - dimensional plane with monte carlo method on the meso - level . then , the growth process of a crack of concrete 3 - point bending beam specimen is analyzed by fem , according to the criterion of maximum circumferential tensile stress . and the path of crack to spread in mortar , aggregate and interfaces of them is gained by the ultimate fracture criteria in construction standard that the width of crack should not be more than 0 . 2mm 首先,在细观层次上,根据蒙特卡罗随机抽样原理,在二维平面上建立了混凝土多边形随机骨料结构模型,然后采用有限元计算方法,根据最大周向正应力准则,对三点弯曲梁构件进行了开裂过程的模拟,并以建筑规范中构件裂缝小于0 . 2mm的要求为最终破坏标准,得出了裂纹在基质、骨料及界面的扩展路径。
A new interface - perturbation model of solid - state displacement reactions ternary system is suggested and the interface - stability criterion is derived in the form of chemical potential if the chemical potential of rate - control - element at frontier of tiny perturbative zone goes up less than 20 . 7 % , linear interface will grow up stablly and form layered structure ; if it goes up more than 20 . 7 % , linear interface is not stable and will form aggregate structure 通过建立界面扰动模型,推导了三元固态置换反应系界面稳定性的化学势梯度判据。结果表明:如果扰动微区前沿速率控制元素的化学势梯度升高小于20 . 7 ,平面界面稳定长大,将形成层状结构;若大于20 . 7 ,平面界面不稳定长大,将形成束集型结构。
Ploughing deeper and corn residues might promote formation of soil aggregated structure , decrease soil bulk density , relax solum , decrease soil porosity , raise soil permeability , improve soil structure and holding - water capability , create better soil biology condition for growth of crop , and coordinate water , fertilizer , air and heat etc . to prevent the fertility deterioration of the corn belt phaeozem and ameliorate soil , it is need to reform tillage and fertilizer application for the corn belt phaeozem in the central part of jilin 针对吉林玉米带黑土土壤退化现象,从黑土玉米的耕作制和施肥制的改革入手,并结合农村现有机械和技术水平,采用玉米“轻主重辅”三三耕作制和玉米“一稳二减三补”施肥技术,提出吉林玉米带黑土土壤调控技术体系。
2 . the structure of purple soil is meliorated by sabaigrass . when contrast to bare land treatment and natural wild grassland treatment we knew that sabaigrass treatment and grass tree solid plating treatment reduced soil bulk density , enhanced soil capillary porosity , non - capillary porosity and porosity ratio , decreased soil sand grain content , enhanced soil clay grain and silt grain content so as to reduced the dispersal degree of soil , improved the aggregate capacity of soil , increased the amount of soil aggregate structure , meliorated the water permeability of soil , accelerated the form of good soil structure 龙须草能改善紫色土的土壤结构龙须草纯种植被和林草立体种植植被能不同程度地降低土壤容重,减少土壤砂粒含量,增加土壤的毛管孔隙度、非毛管孔隙度和孔隙比,以及增加粉粒含量,从而降低土壤分散度,提高土壤团聚性,增加土壤团粒结构数量,改善土壤的透水性,促进良好土壤结构的形成,最终提高土壤的蓄水保肥性能,增强土壤的抗蚀性和抗冲性。