土壤冻结

2.3个森林群落OL和MS的细菌和真菌rDNA基因拷贝数也随土壤冻结-融化过程表现出先降低后升高的变化趋势，以土壤冻结后最低。

As the soil freezing and thawing processes , the bacterial and fungal rDNA copy numbers showed a decrease and then increase trend in the OL and MS , and the lowest values were observed in the soil freezing stage .

地埋管换热器周围土壤冻结温度场的模拟研究

Simulation Research on Soil Freezing Temperature Field Surrounding Ground Heat Exchanger

不同地表条件下土壤冻结、融化规律分析

Analysis on Soil Frozen and Thawed Regulation under Different Soil Surfaces

土壤冻结深度公式的研究

Modification of the formula for calculating the freezing depth of soil

人工土壤冻结过程的计算机模拟

Computational simulation to the artificially freezing process of shaft support in earth

土壤冻结条件下水、热耦合运移数值模拟研究

Numerical simulation of water and heat transfer during soil freezing

多孔介质土壤冻结过程中的冻涨问题

The frost swelling problem of frozen soil with porous media

土壤冻结过程中水分迁移动向的研究

A study on water movement trend during soil freezing

季节性冻土地区土壤冻结深度的研究

Research of ground frozen depth in Seasonally Frozen Areas

上层土壤冻结时降温速率快，融化时升温速率也快，且融化速率大于冻结速率。

Freezing rate of the upper soil is fast , so as heating rate .

土壤冻结温度测定试验研究

Experiment Study on Measurements of Soil Frozen Temperature

介绍一种土壤冻结特征曲线的测定方法，并用自制的恒温冻结室和量热装置测量了4种典型土壤的冻结特征曲线；

A determining method of the soil water freezing characteristic curve is put for-ward .

一种土壤冻结特征曲线的测定方法

Determination of Soil Water Freezing Characteristic Curve

它让墙底的土壤冻结膨胀。

That sends the frozen-ground-swell under it .

土壤冻结时间的数值模拟及实验

Study on numerical simulation of freezing time of soil and experimental designed for its reliability

土壤冻结过程中潜水蒸发规律的模拟研究

Simulation on phreatic evaporation during soil freezing

下层土壤冻结时降温速率快，而融化时升温速率非常缓慢。

Freezing rate of the lower soil is fast , but heating rate is slow .

土壤冻结达到的最大深度。

Maximum depth of frozen ground ;

土壤冻结、消融期水盐动态的初步研究

Preliminary study on the dynamical regime of water and salt during the freezing and thawing period of soil

土壤冻结对地热换热器传热的影响

The influence of soil freezing on the heat transfer between heat exchanger of ground-source heat pumps and its ambient

温度变化导致的土壤冻结和冻融循环对土壤动物群落施加强烈作用，显著影响了动物群落的结构和功能以及相关土壤生化特性，这在有机土壤层表现的更为明显。

These freeze-thaw cycles showed significant effects on the structure and function of soil fauna communities , especially which in soil organic soil layer .

该文通过土壤冻结期间积水入渗试验，获得了不同入渗水温条件下冻土的入渗规律。

During the freezing period , the infiltration experiments were conducted and the infiltration characteristics of the frozen soil under different water temperatures were obtained .

根据土壤冻结过程中水热迁移的基本方程，推导了土壤水热耦合方程，改进了冻结条件下土壤水热迁移问题的求解方法。

Based on the basic equations of simutaneous soil water and heat transfer during soil freezing and thawing , the coupled equation of water heat is educed .

我国北方地区冬季，地表土壤冻结，春季融化，经历周期性的冻融。

In northern area of China , the soil surface is frozen in winter , will be melted in spring , so the soil surface is experienced periodic frozen and melted .

由于土壤冻结时，不断发生水分迁移、冰-水相变、成冰冻胀等现象，故水热力之间的耦合关系十分复杂，研究难度很大。

As soil freezing , the moisture moved , ice-water changed in phase , raised ice and frost heave continuously happened , the coupled heat-moisture-stress was very complicated and hard to research .

这种由土壤冻结／融化作用驱动的细菌群落结构变化可能对认识冬季土壤生态过程具有重要意义，但具体的机制及其作用过程还需要作进一步深入的探讨。

Therefore , the changes of soil bacterial communities drove by soil freezing / thawing could be beneficial to understanding winter soil process , although the detail of mechanisms were still unclear .

分析了土壤冻结温度随土壤含水量及含盐量的变化规律，为确定试验区越冬期土壤冻融状况提供了依据。

The variety regulations of soil frozen temperatures with water contents and salinity were analyzed , which would provide basis for determining soil freezing and thawing in the winter and spring in the experiment area .

建立了土壤冻结过程数学模型及传热特性微分方程（温度模型），对土壤冻结时间进行数值模拟，采用有限差分法进行数值求解。

The mathematical model based on temperature formulation for describing freezing course of soil has been presented and the explicit finite difference method was used to perform computer simulation of freezing time of soil in this paper .

针对土壤冻结过程的数值分析，基于显热容法用有限差分法构造出热传导方程变空间步长的半隐格式和全隐格式。

Based on the numerical calculus of soil freezing and the apparent heat capacity method , completely and partly implicit difference schemes of the heat transfer equation were deduced by the finite difference method with variable space step .

如果你住的地方土壤冻结，简单地用在菜园上覆盖厚厚的一层树叶或稻草就行了，这会防止土壤冻结，收割时可撤走地面覆盖。

If the ground does freeze in your part of the world , simply cover your carrot garden with a thick layer of leaves or straw . This will prevent the ground from freezing . You can remove the ground cover and harvest the carrots as they are needed .