1) Density of soil layer
土层密度
2) soil compactness
土密实度
1.
The relationship between soil compactness and feature parameters is then investigated and the corresponding half-experiential formulas are established.
在室内试验的基础上,提出了土密实度瞬态振动测试信号的信息熵分析方法以及时域和频域信息熵谱的计算方法,并给出了用信息熵对土密实度进行定量分析的半经验模型(拟合公式)。
2.
By analysis of ANN,the model of BP neural network is built for soil compactness quantitative analysis.
文章通过对人工神经网络的分析,建立了瞬态振动法测定土密实度的神经网络模型,网络的学习算法采用改进的BP算法。
3.
Based on a great amount of laboratory test, the instant vibration signal from soil compactness (include dry density and water content) testing is analyzed systemically and the corresponding quantitative analysis method is put forward for the determination of soil compactness.
本文在大量的室内试验基础上，较系统地对土密实度(包括干密实度和含水量)瞬态振动测试信号进行了分析，给出了土密实度振动测试的定量计算方法。
3) soil density
土壤密度
1.
The result shows:(1) The soil density and stone content increased with increasing soil depth;while total porosity,capillary porosity,non-capillary porosity,saturated water content,(capillary) soil water content,and field capacity of soil decreased with increasi.
结果表明:(1)随土深增加,土壤密度和石砾含量逐渐增大,而土壤总孔隙度、毛管孔隙度、非毛管孔隙度、土壤饱和持水量、毛管持水量和田间持水量却逐渐减小,但非毛管孔隙度在100cm以下土层时因石砾含量加大却随土深增加而增大;(2)各项土壤水文物理性质基本上均是阴坡优于半阴半阳坡和阳坡,半阴半阳坡与阳坡差别不大;(3)随着坡位下降,土壤厚度、土壤密度、石砾含量、非毛管孔隙度逐渐增大,总孔隙度和毛管孔隙度逐渐减小,各种持水量指标基本上也是程度不同地减小,但上坡的持水量指标大于阴坡坡顶;(4)4种植被类型0~30 cm土层的土壤密度为天然灌丛<天然草地<乔木林地<退耕地;石砾含量为退耕地最低,其它3种植被类型差别不大;总孔隙度、毛管孔隙度、饱和持水量、毛管持水量和田间持水量均是天然灌丛>天然草地>乔木林地>退耕地;非毛管孔隙度则是退耕地>乔木林地>天然灌丛>天然草地。
2.
In order to find out the effects of super absorbent polymers(SAP) on physical and chemic characteristics of soil and apply it reasonably on drought resistance and water saving,soil moisture constants,soil density,pH values,soil expansion ratios and soil hardness of SAP-mixed soil were measured at experimental station,Agricultural University of Hebei.
结果表明:保水剂能显著提高土壤中的土壤水分常数和土壤孔隙度,但混剂土的土壤密度减小;保水剂能明显提高土壤的膨胀性能65%~170%;保水剂加入土壤后对土壤的pH值影响较小;在土壤大量失水后,保水剂能明显降低土壤坚实度,对照土壤的硬度是混剂土硬度的5。
4) covered soil density
覆土密度
1.
The research results of the effect of covered soil density on reducing radon emanation rate are introduced.
介绍了覆土密度对降低氡析出率影响的试验研究结果。
5) soil bulk density
土壤密度
1.
With the increment of soil bulk density and water discharge rate, the movement of horizontal wetting front increased and the vertical movement decreased.
土壤质地、滴头流量、土壤密度以及供水方式等因素对于点源入渗有着一定的影响。
6) reservoir density
储层密度
补充资料：非密度制约因素(见密度制约因素)
非密度制约因素(见密度制约因素)
l焦非密度制约因素见生态因素、密度制约后
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条