查询词典 infertile soil

By means of the orthogonal expansion technique, the coupling system solutions are finally obtained. Then the dynamic model of saturated soil layer caused by pile longitudinal vibration is founded. Incorporated wave propagations into saturated soil layer, the characteristics of soil resistance factor and the mechanism of the radial damping are analyzed, as well as distributions of shear stress and pore pressure in saturated soil caused by pile vibration.

然后利用上述解析解分析了饱和土层复阻抗，并从饱和土波动理论出发，建立了桩纵向振动引起的饱和土层振动模式，剖析了辐射阻尼产生机理，研究了桩纵向振动引起的饱和土层中剪应力及孔隙水压力分布。

With 0~20mm layer of soil organic matter,, total N, available P, available K and pH value, such as soil nutrient content of the data base, the use of ArcGIS 9.0 and the Kriging interpolation grid overlay function, with statistics Methods, drawing a map Shucheng County soil nutrient level. Soil available nutrient was classified into four grades.

以安徽舒城县为例，以0~20mm土壤层的有机质、速效钾、速效磷、PH值等土壤养分含量为数据基础，利用ArcGIS 9.0的Kriging插值和栅格叠加功能，结合地统计学方法，绘制出了舒城县土壤养分等级图。

Soil oxidoreductase is a group of enzymes catalyzing many important soil biochemical reactions and concerning with the transformation of soil organic matter,formation of humic substance,and dynamics of soil fertility.

土壤氧化还原酶是存在于土壤中的一种重要酶类，参与土壤中为数众多的重要生物化学反应，与土壤中有机物质的转化、腐殖质的形成以及土壤肥力变化密切相关。

The adsorption of Butachlor in four main types of soils (black soil, paddy soil, saline soil and planosol soil) in Northeast China was studied in this experiment.

试验对除草剂丁萃接在东北地区主要土壤黑土、水稻土、盐碱土、白浆土中的吸附进行了研究。

Soil erosion is the most serious ecological environmental problem in Loess Plateau of China. Unreasonable land use practice is identified as one of the most important reasons for triggering and aggravating soil erosion, and the driving mechanisms for land use change and the relationship between land use spatial pattern and soil erosion are the important aspects for the study about soil erosion.

水土流失是黄土高原地区严峻的生态环境问题，不合理的土地利用是引发和加剧水土流失的重要原因之一，土地利用变化驱动机制和土地利用空间格局与水土流失关系是其研究的重要方面。

The soil potential is in accordance with the pondage stage the variety mutually, The soil potential of the current total from diminish to back up again greatly, just the soil layer is from the top bottom, the water potential of the current value enlarge, the water potential changes to let up, the 100 cm soil layer is as follows almost yearly stable.

土壤水势变化与贮水量三阶段相对应，总体由大变小再回升，只是土壤剖面空间从上而下，水势值增大，变幅减小，100cm土层以下近乎常年稳定。

The assumption of the variable tendency of slip-line in active zone is made based on the numerical results. Combining the slip-line equations and boundaries, the formula of bearing capacity is deduced which can consider the density of soil. The formula of bearing capacity of strip footing on ponderable soil is also deduced assuming that the slip-line field of ponderable soil is the same with that of weightless soil, which is proved to be an upper-limit solution, as its the same with that deduced by the upper-limit method in Prandtl mechanism.

在数值计算结果的基础上，对有重土地基主动区滑移线变化趋势进行了合理假设，根据边界条件和特征线方程求得了条形基础极限承载力的解析表达式，该表达式可以计算考虑土重度的条形基础的极限承载力；获得了不考虑重度对滑移线场影响时(即有重土在普朗特尔滑移线场下)极限承载力的解析表达式，该表达式与普朗特尔机动场对应的极限承载力上限解的表达式相同，这就从理论上证明了在土重度对滑移线场没有影响这一假定前提下得到的极限承载力是一个上限；(3)利用上限定理求解了极限承载力的最小上限。

The results showed that the quantities of bacteria in the petroleum contaminated soil were about 100 times more than that in the non-contaminated soil,the quantities of fungus and ray fungus in the contaminated soil were also extensively more than that in the non-contaminated soil.17 bacteria strains and 11 fungus strains for petroleum biodegradation were screened from the contaminated soils.

结果表明：石油污染土壤中的细菌总数是未污染土壤的100倍左右，其真菌和放线菌数量也明显超过未污染土壤。

Formula. At the same time, the article raised the seismic reduction factor formula for the SSDI system.The paper adopts finite element method based on the ANSYS procedure, and realizes the simulation of soil constitutional relationship through choosing Davidenkov soil model with proper parameters and using restartup method in ANSYS. Then, the procedure makes the soil nonlinearity simulation come true byusing parameter design language of APDL. Element Combin14 is be used to simulate viscoelastic boundary and radiation damping effect. At the same time, it presents integrated damping matrix for considering the coupling of different damping of soil and structure.

文章以ANSYS为计算分析工具和平台，通过对Davidenkov地基模型的研究及其参数的选取，利用ANSYS的重新启动分析方法并采用APDL参数设计语言来编制程序，实现对土体非线性动力本构模型的模拟；同时利用ANSYS中Combin14单元模拟粘弹性边界，以此建立人工边界来模拟辐射阻尼效应；并提出集成阻尼矩阵的方法，解决结构和地基土阻尼不同而导致的阻尼耦合的问题。

Using environmental radionuclide 210Pb to study the soil erosion and sediment had great application value and potential. When the nuclide was settled on the surface with atmosphere, it was absorbed by the soil particle quickly. The soil erosion rate on the scale of 100 years was traced through the remotion of nuclide in soil and its regular distribution nude.

利用环境放射性核素210Pb来研究土壤侵蚀和沉积具有很大的应用价值和潜力，当核素随大气沉降到地表时，迅速被土壤颗粒吸附，通过其在土壤间的移动和有规律的分布模式可以示踪100年尺度上的土壤侵性速率。

Listen,point and check your answers.

听，指出并且检查你的答案。

Warming needle is one of effective treatment methods for knee arthralgia aggravated by cold,and it is simple,safety,so it should be developed in clinical acupuncture and moxibustion extensively.

但以本院科针灸门诊在2005年1月—2006年6月期间共收治膝痛患者100余例，经过临床的诊断后，其中施以温针治疗的48例，疗效显著，报道如下。1临床资料本组病例48