助手标题  
全文文献 工具书 数字 学术定义 翻译助手 学术趋势 更多
查询帮助
意见反馈
   indirect stress 的翻译结果: 查询用时:0.191秒
图标索引 在分类学科中查询
所有学科
建筑科学与工程
更多类别查询

图标索引 历史查询
 

indirect stress
相关语句
  间接应力
     RESEARCH ON INDIRECT STRESS AND CRACK CONTROL OF CONCRETE STRUCTURES
     混凝土结构间接应力及其裂缝控制研究
短句来源
  “indirect stress”译为未确定词的双语例句
     The measurable concrete strain includes the free deformation strain,the creep strain and the temperature strain besides the elastic strain. This paper introduces the methods and steps of indirect stress measurement of pre-stress concrete continuous bridge.
     混凝土实测应变除弹性应变外还包含混凝土的自由变形、徐变和温度应变等非应力应变,介绍了预应力混凝土连续刚构桥中应力间接测量的方法和步骤.
短句来源
  相似匹配句对
     RESEARCH ON INDIRECT STRESS AND CRACK CONTROL OF CONCRETE STRUCTURES
     混凝土结构间接应力及其裂缝控制研究
短句来源
     Stress and Immunity
     应激与免疫
短句来源
     INDIRECT HYBRIDIZATION
     间接核酸杂交方法的建立
短句来源
     (2) stress;
     (2)应激反应;
短句来源
     The indirect BIEM is used regarding the stress function as the analysis object.
     在理论方程式建模中采用间接式边界积分方程法 ,以应力函数作为解析对象 ,直接求解齿轮应力、轮齿刚度变形等。
短句来源
查询“indirect stress”译词为用户自定义的双语例句

    我想查看译文中含有:的双语例句
例句
为了更好的帮助您理解掌握查询词或其译词在地道英语中的实际用法,我们为您准备了出自英文原文的大量英语例句,供您参考。
  indirect stress
GAP 857 23 Application of indirect stress measurement techniques to quantify stress environments in mines.
      


Vegetation dynamics is a new interdisciplinary science, studying the laws of evolution of watershed vegetation under the action of various kinds of ecological stresses, especially soil erosion. Ecological stress is defined as any kind of disturbance, natural or non-natural, on the vegetation development, which may change the vegetation cover or affect the evolution process of vegetation. Soil erosion is the most important natural ecological stress and human activities are the non-natural ecological stress. In...

Vegetation dynamics is a new interdisciplinary science, studying the laws of evolution of watershed vegetation under the action of various kinds of ecological stresses, especially soil erosion. Ecological stress is defined as any kind of disturbance, natural or non-natural, on the vegetation development, which may change the vegetation cover or affect the evolution process of vegetation. Soil erosion is the most important natural ecological stress and human activities are the non-natural ecological stress. In the loess plateau of northwestern China, the vegetation is hardly developing because the extremely high rate of erosion tears down the topsoil, on which the vegetation grows. In the areas with vegetation, such as the upper reaches of the Yangtze River, erosion damages and destroys the vegetation and scars the land surface. The ecological stresses impacting the vegetation are: (1) natural stresses, such as the erosion, drought, storm, eruption of volcano, and the damages by animals, as well as pests and diseases; (2) human stresses, such as air pollution, grazing, logging, reclamation, mining, road construction, and afforestation. Afforestation is positive stress and the rests are negative stresses. In addition, indirect stress like acid rain is also caused by human activities. In many areas human activities exert much stronger impacts on the vegetation than natural stresses. The ecological stresses can be classified as long term stresses, such as erosion, air pollution, and grazing, short-term stresses, such as drought, pests and diseases, and acid rain, or instant stresses, such as volcano eruption, forest fire, logging and wind storms. Vigor reduction and mortality of vegetation may result from short-term stress acting on trees that have been predisposed to injury by long-term ecological stresses. Different from other stresses, soil erosion not only impacts the vegetation but is also affected by vegetation. In the nature, the development of vegetation cover and variation of soil erosion is affected with each other following a law of dynamics. For a watershed, vegetation and erosion may reach an equilibrium state if the circumstances maintain unchanged for a long period of time. However, the equilibrium is not stable. Ecological stresses, especially human activities, may disturb the balance and initiate a new cycle of dynamical processes. In this paper, the quantitative expressions of the long-term, short-term and instant ecological stresses are introduced based on the temporal characteristics of the stresses. Erosion is qualitatively represented by the rate of sediment eroded from unit area per year, and the vegetation is presented by ratio of vegetation cover, or simply vegetation cover, which is defined as the percentage of the area covered with trees and shrubs. Thornes proposed a model of geomorphologic process considering the rate of variation of vegetation cover with coupled differential equations. Introducing the qualitative expressions of various ecological stresses and revising the Thornes geographical model, this paper established a vegetation dynamics model and derived the theoretical solution. Data were collected from field investigations to the Xiaojiang Watershed on the Yunnan Plateau of south China. The vegetation dynamics model is well applied to the Xiaojiang Watershed, the Heishui River watershed and the Shengou Watershed. The theoretical solution agrees well with the data. The results demonstrate that the vegetation-erosion dynamics is a powerful tool for prediction of the vegetation evolution. Usually, reforestation and erosion control improves the watershed vegetation slowly in the first 10 years but much faster in the second 10 years, implying the effort of reforestation and erosion control must be a long-term strategy. Erosion control is very important for re-vegetating the hills. Mere planting trees and shrubs does not work well for greening the exposed land. The results also show that in the arid areas although people continuously reforest the hills and control erosion the

研究侵蚀地区的植被在水力侵蚀和各种生态应力以及人类活动影响下的演变规律 ,建立了植被生态动力学模型。将作用于植被的各种生态应力分成长期、短期和瞬时应力 ,给出了它们的定量表达式 ,并且统一在植被生态动力学方程中 ;同时进一步得出了动力学耦合方程组的理论解。该模型应用于金沙江支流小江流域 ,结果较好地描述了流域的植被生态演变过程与侵蚀过程的关系 ,说明了治理强度和控制侵蚀对植被发育的重要性。

Acid rain can damage either plant leaves directly or plant roots indirectly resulting from soil acidification and release of base ions. The direct and indirect stress effect of acid rain results in the unbalance between the production and elimination of active oxygen in plant stems, which causes the lipid peroxidation of plant cell membrane, and damages the plants. The effects of simulated acid rain and its acidified soil on the lipid peroxidation of wheat seedlings was quantified with a pot experiment....

Acid rain can damage either plant leaves directly or plant roots indirectly resulting from soil acidification and release of base ions. The direct and indirect stress effect of acid rain results in the unbalance between the production and elimination of active oxygen in plant stems, which causes the lipid peroxidation of plant cell membrane, and damages the plants. The effects of simulated acid rain and its acidified soil on the lipid peroxidation of wheat seedlings was quantified with a pot experiment. A yellow-brown soil was leached with simulated acid rain of varying pH values that were 5.6,4.5,3.5,3.0 or 2.5. The proton release from the simulated rain acidified the yellow-brown soil, and released the base ions from the soil. With the pH value of simulated acid rain decreasing from 5.6 to 2.5, the pH value of the acid rain-leached-soil decreased from 6.1 to 3.4 and the total amount of exchange base ions decreased from 56.5 mmol/kg to 41.1 mmol/kg, respectively. Spraying the shoots of the wheat seedlings planted in such acidified soils with simulated acid rain of five different pH values increased lipid peroxidation in the wheat seedlings. With the increased acidity of the simulated acid rain and its acidified soil, the amount of malondialdehyde and relative permeability of membrane in the wheat seedlings increased. Significant increase in lipid peroxidation in the wheat seedlings was mainly due to a decrease in the capability of protective enzymes to eliminate base oxygenic ions. As a result of such stress effect of simulated acid rain and its acidified soil on wheat seedlings, the physiological activities of the superoxide dismutase and catalase in the wheat seedlings decreased, but that of peroxidase increased. The strong acid rain with pH 2.5 and the acidified soil leached with such acid rain decreased the biomass of wheat seedlings by 20.5%~33.5%, and had a severe effect on the wheat growth and development. In addition, the effect of spraying the wheat seedlings with simulated acid rain on the lipid peroxidation and activities of protective enzymes in wheat leaves was greater than that of wheat grown in the acidified soil. The latter, however, was greater than the former on the lipid peroxidation and activities of protective enzymes in the wheat roots.

以小麦为试材,采用盆栽的方法研究了模拟酸雨及其酸化土壤对小麦幼苗膜脂过氧化水平的影响。结果表明以黄棕壤为材料通过模拟酸雨的淋溶,引起了土壤酸化和盐基流失。当模拟酸雨的pH值由5.6下降到2.5时,土壤pH值由6.06下降到3.41,土壤中交换性盐基总量便从56.5mmol/kg下降到41.1mmol/kg。将小麦幼苗栽培在该酸化土壤上,并分别用5种不同pH值的模拟酸雨喷淋地上器官,导致小麦幼苗体内的膜脂过氧化水平增高和保护酶的活性变化。其中模拟酸雨喷淋小麦幼苗对叶片中的膜脂过氧化水平及保护酶活性的影响大于酸化土壤对其产生的影响。而酸化土壤对小麦幼苗根系中的膜脂过氧化水平和保护酶活性的影响大于模拟酸雨喷淋对其产生的影响。同时,pH≤3.0的高强度酸雨以及由其产生的酸化土壤(T4、T5土壤)对小麦幼苗的膜脂过氧化水平和保护酶的活性产生了严重的影响。

The measurable concrete strain includes the free deformation strain,the creep strain and the temperature strain besides the elastic strain.This paper introduces the methods and steps of indirect stress measurement of pre-stress concrete continuous bridge.In the transition from concrete strain to stress,the no-stress-meters are adopted to remove the no-stress-strain.The strain gauges that are installed at the neutral beam axis are used to identify the creep factor.Separating the...

The measurable concrete strain includes the free deformation strain,the creep strain and the temperature strain besides the elastic strain.This paper introduces the methods and steps of indirect stress measurement of pre-stress concrete continuous bridge.In the transition from concrete strain to stress,the no-stress-meters are adopted to remove the no-stress-strain.The strain gauges that are installed at the neutral beam axis are used to identify the creep factor.Separating the creep strain with the superimposing method is introduced into the transition.The key to concrete stress measure is the translation from strain to stress.And the transition 's key is the identification of creep factor.In construction supervision period of Xijiang Bridge,the stress of neutral beam axis is adopted to identify the creep factor and then the creep strain is separated.The results show that the stress value is very close between measurement and calculation.

混凝土实测应变除弹性应变外还包含混凝土的自由变形、徐变和温度应变等非应力应变,介绍了预应力混凝土连续刚构桥中应力间接测量的方法和步骤.在混凝土实测应变与应力的转换中,采用无应力计去除非应力应变,利用预埋在主梁中性轴的应变计进行混凝土徐变系数识别,并采用叠加法对徐变应变进行分离.混凝土内部应力测量关键在于应力应变转换,而应力应变转换关键在于徐变系数的识别.在西江大桥施工监控期间,先采用中性轴应力来识别徐变系数,再进行徐变应变分离的方法,应力实测值与弹性理论计算值比较接近.

 
图标索引 相关查询

 


 
CNKI小工具
在英文学术搜索中查有关indirect stress的内容
在知识搜索中查有关indirect stress的内容
在数字搜索中查有关indirect stress的内容
在概念知识元中查有关indirect stress的内容
在学术趋势中查有关indirect stress的内容
 
 

CNKI主页设CNKI翻译助手为主页 | 收藏CNKI翻译助手 | 广告服务 | 英文学术搜索
版权图标  2008 CNKI-中国知网
京ICP证040431号 互联网出版许可证 新出网证(京)字008号
北京市公安局海淀分局 备案号:110 1081725
版权图标 2008中国知网(cnki) 中国学术期刊(光盘版)电子杂志社