凍土 的英文怎麼說

Accidence discuss of water hunting by using half decay time method on island tundra

凍土帶上半衰時找水初探

Because the road line is in mountainous region and heavy hilly area and its surface relief undulates greatly, more slope wash and dilurial layer distribution, there are more harm, for example, island shaped perennially frozen soil, drift ice and so on, which effect the stability of the road foundation

由於沿線地處山嶺重丘地區，地勢起伏較大，坡積物及洪積層分佈較多。故島狀多年凍土、涎流冰等病害較多，影響路基的穩定。

Roll over protective structure ( rops ) is a device which installs on out of construction vehicle. the main functions are : when the vehicle rolling over. rops can prevent the vehicle from rolling over further, and reduce the possibility of rolling vehicle injures operator ; when the vehicle traveling on freezing soil. concrete and rock, it has large resist continuous impact ability ; when the vehicle overturning rops can support the whole vehicle. arrangement of falling object protective structure ( fops ) can block objects ( such as trees, rocks ) so that supply protection for operator. this problem is that research rolling over and falling objects protective structure of bulldozer by learning research condition of rops / fops and relative lay down international standard. on the base of theory analysis. detrudes counting formula of rops / fops deformation through founding mechanics analysis model of rops / fops at the stage of elasticity and plastoelastic. and finds a set of feasible nonlinear finite element analysis counting. lt calculates rops / fops plastoelastic deforma variable of 320hp bulldozer, bulldozer has been carried out by optimizing design method

其主要功能是：當車輛滾翻時， rops能刺入未凍土壤而阻止車輛的進一步滾翻，降低滾翻的車輛對系著安全帶司機軋傷的可能性；保證rops在碰撞和沖擊變形不大的地面（如凍土、混疑土上、巖石）時，能具有相當大的抗連續沖擊能力；當車輛已經處于顛覆狀態時，已經變形的rops應能支撐住整車。落物保護裝置（簡稱fops ） ，其構件的布置方式要能遮蔽墜落的物體（如，樹木、巖石等） ，以便對司機提供適當的保護。本課題主要通過了解國內外有關對rops fops的研究情況和有關國際標準的制定，對大型推土機傾翻和落物保護裝置進行研究，在理論分析的基礎上，通過建立rops fops的力學分析模型，推導彈性、彈塑性階段rops fops變形的計算公式，建立一套可行的rops fops的非線性有限元分析計算方法。

Analyzing frost heaving and frost boiling of the roadbed

季節性凍土區路基土的凍脹特性分析

Frost heaving analysis of corrugated pipe culvert without foundation in permafrost region

多年凍土地區無基波紋管涵洞凍脹分析

Application of posterior canal wall reconstruction and mastoid obliteration

季節性凍土地區襯砌渠道的防凍措施

Perhaps this is caused by the sudden melting of subsurface permafrost.

可能是地下永久凍土突然融化所造成。

In permafrost areas in the soviet union or canada or alaska, ice has been used effectively for walling and roofing.

在蘇聯、加拿大或阿拉斯加的永久凍土地區，冰一直很有效地用來做墻和屋頂。

Heat - bar construction technique on permafrost areas

多年凍土地區熱棒施工技術

As permafrost gets warmer, it could become wetlands

永久凍土變得更加溫暖時，將變成濕地。

Stability of gas hydrate in permafrost

凍土帶天然氣水合物穩定性研究

Distribution and characteristic of permafrost of hei longjiang privince

黑龍江省多年凍土分佈特徵

Effect of temperature control on tunnel construction in permafrost

溫度場控制在多年凍土隧道施工中的作用

This was a challenge, because the permafrost is barely permanent

這是一大挑戰，因為這里的凍土並非永久不變。

The two tremendous continental countries shared a frontier of 4, 000 miles in a vast arc from the frozen tundras of siberia to the stark deserts of central asia.

這兩個遼闊的大陸國家的共同邊界從西伯利亞凍土地帶到中亞細亞荒漠劃出一個大弧形，長達四千多英里。

On four legs, they resemble the great timber wolves that make the tundra their home

當他們四足的時候，象來自凍土地帶的森林巨狼。

( 1 ) modeling of numerical analysis of frozen soil ventiduct roadbed by ann ( 2 ) developing the ann optimization design system for ventiduct roadbed in permafrost area ( 3 ) defining of the sequel learning tactic of three layer bp network ( 4 ) improvement on bp arithmetic in ann module

（ 2 ）開發了凍土通風管路基優化設計神經網路分析軟體系統具有完整的前後處理、溫度場分析、設計方案優化等功能，能滿足工程應用的基本需要。還能夠作為數值分析子模塊，以標準com組件形式嵌入「青藏鐵路數字路基」 gis系統。

The first geologic reason for degeneration of the eco - environment in the headwater area of the yellow river is that the increase of the recent geologic function caused desertification and grasslands resource decreased and underside changed, destroied the balance of water - air - heat in the area ; the second is that the water environment changes by the degradation and atrophy of frozen earth cause multilayer and synthesis cause of formation degeneration of the eco - environment ; the third is that the man and rats function accelerated degeneration of the eco - environment in the headwater area of the yellow river

摘要黃河源區生態環境惡化的地質原因之一是現代地質作用增強，形成以荒漠化為主的草地資源退化與下墊面改變，地區水氣熱平衡破壞；二是因凍土退化、萎縮，引起水環境變異，導致多層面與綜合成因的生態環境惡化；三是人為及鼠類活動對源區生態環境惡化起著推波助瀾的作用。

During analysis of former edge slope stabilization, it is not especially that affects of freezing - melting eroding to edge slope to slide. the thesis puts forward beiyin channel was destroyed by cold freezing eroding, freezing - melting and runoff of melting snow ect

本文提出北引渠道由於地處高寒和多年凍土地區，在寒冷剝蝕、凍融剝蝕以及融雪徑流等的動力作用下，渠道將發生較為嚴重的破壞。

In the end of this part, some application examples of fracture mechanics for the frozen soil have been given out. in the second part, continuum damage mechanics has been introduced to study the characteristics of the frozen soil. on base of additional damage concept, a judging model for initial and additional damage for frozen soil was proposed

第五章進行的是凍土損傷力學的測試研究，首先介紹了凍土損傷的動態測試原理與方法，採用附加損傷的概念推導了凍土初始與附加損傷的動態識別模式，隨后對凍土單軸壓縮過程進行了動態測試，對在這一過程中的內部結構變化特徵進行了研究。