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重力差异
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  “重力差异”译为未确定词的双语例句
     The shallow tectonic deformation and the development of subsidence-deposition center during Neogene and Quaternary are controlled by regional tectonic stress field, dextral strike slip of Ying-Wei Fault, gravitational differential compaction, thermodynamic subsidence and isostatic equilibrium due to mantle detachment-sagging in Bohai Bay Basin.
     区域构造应力场、营潍断裂右旋走滑扭动、重力差异压实、热沉降以及地幔拆沉引起的均衡调整作用共同控制和影响了渤海浅层上第三系和第四系的构造变形和沉降沉积中心的形成。
短句来源
     Based on the phenomenon of two-phase flow and the effect of turbulence resulted in an inflated water line and the weight difference in gas and water,a simple and reliable sensor of tiny leakage for cooling stave of blast furnace has been developed based on foundamental hydrodynamics.
     根据基本流体力学原理,利用气-水的重力差异、两相流现象和膨胀管路产生的湍流效应,设计并制作了结构简单、可靠性较好的高炉冷却壁微泄漏传感器.
短句来源
     Laminar flow commonly existed in horizontal wells because of gravity difference and its type is effected by well inclined angle and turned complicated under the influence, which caused change in measurement instrument and parameter. The traditional decollement model is not applicable to production fluid profile interpretation in horizontal wells.
     水平井中因重力差异普遍存在层流,且流型受井斜角度影响变得复杂,致使测量仪器及测量参数发生变化,传统的滑脱模型已不适用于水平井产液剖面解释。
短句来源
     The analysis of the accommodation change mechanism and features in a reversed structure based on its evolution characteristics in the basin reveals that it is mainly influenced by local dipping and slow falling of the basin basement caused by compression deformation,and that the differentiae gravity compaction of the sediments leads to the unbalance of the basin,which in turn,causes the difference settling of the basement.
     根据松辽盆地的构造演化特征,讨论了构造反转背景下可容纳空间的变化机制和特征,认为在构造反转背景下影响可容纳空间的主要因素有以下3种:①受挤压所导致的扭曲变形引起盆地基底局部的下沉和缓慢的沉降; ②沉积物的重力差异压实导致盆地均衡失调引起基底的差异沉降;
短句来源
  相似匹配句对
     Results There was significance difference in size of SPT between Alutard and existing Chinese allergens.
     的差异 .
短句来源
     The Difference
     差异
短句来源
     Differetial Analysis on Designing Caculations of Intermittental Gravity Concentrator
     间歇式、连续式重力浓缩池设计计算差异分析
短句来源
     EIFFERENCE BETWEEN TWO ISOSTATIC VRAVITY ANOMALY MAPS OF CHINA
     两幅全国均衡重力异常图的差异
短句来源
     GRAVITY TIDE CORRECTIONS
     重力潮汐改正
短句来源
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  gravitative differentiation
Der Autor ist der Meinung, da? die deutlich in Erscheinung tretende zonale Anordnung der Gesteine im Chagnon-Orford-Lakkolith auf eine gravitative Differentiation in situ zurückzuführen ist.
      


The shallow tectonic deformation and the development of subsidence-deposition center during Neogene and Quaternary are controlled by regional tectonic stress field, dextral strike slip of Ying-Wei Fault, gravitational differential compaction, thermodynamic subsidence and isostatic equilibrium due to mantle detachment-sagging in Bohai Bay Basin. The Basin' Cenozoic overlapping-combination and strong neotectonism are closely related to geodynamic setting of adjacent plate movement. It is very important to ...

The shallow tectonic deformation and the development of subsidence-deposition center during Neogene and Quaternary are controlled by regional tectonic stress field, dextral strike slip of Ying-Wei Fault, gravitational differential compaction, thermodynamic subsidence and isostatic equilibrium due to mantle detachment-sagging in Bohai Bay Basin. The Basin' Cenozoic overlapping-combination and strong neotectonism are closely related to geodynamic setting of adjacent plate movement. It is very important to investigate tectonic derformation in oil and gas exploration, because the distribution of major oil and gas fields is clearly controlled by late faults, and different types of shallow anticlinal traps may have a significant effect on degree of hydrocarbon enrichment. Based on this knowledge, two primary models of hydrocarbon migration and accumulation can be concluded.

区域构造应力场、营潍断裂右旋走滑扭动、重力差异压实、热沉降以及地幔拆沉引起的均衡调整作用共同控制和影响了渤海浅层上第三系和第四系的构造变形和沉降沉积中心的形成。渤海新生代叠加复合的盆地性质和强烈的新构造运动与周边板块活动的动力学背景密切相关。浅层圈闭在渤海油气勘探中占据重要地位,晚期断层对渤海浅层大油气田的分布起控制作用,不同类型浅层背斜圈闭对油气富集程度也有重要影响,据此归纳出两种基本油气运聚模式。

Based on the phenomenon of two-phase flow and the effect of turbulence resulted in an inflated water line and the weight difference in gas and water,a simple and reliable sensor of tiny leakage for cooling stave of blast furnace has been developed based on foundamental hydrodynamics.The experimental result indicates that the sensor can accurately respond to any tiny leakage in the circular pipeline of soft cooling water under 0.2~1.0 MPa,65 ℃.

根据基本流体力学原理,利用气-水的重力差异、两相流现象和膨胀管路产生的湍流效应,设计并制作了结构简单、可靠性较好的高炉冷却壁微泄漏传感器.现场实验表明,该气泡传感器能对0.2~1.0 MPa、65℃以下的软冷却水管路的微量泄漏作出可靠的反应.

Diatom oxygen isotopes applied for paleoclimatic reconstruction started from 1970s first for marine sediments and later extended to lacustrine sediment.As the technologies and methodologies involved are rather complicated,it developed slowly until recent years during which substantial progress had been made and great potential for broad applications to terrestrial sedimentary sequences was demonstrated.This paper is aimed to provide a brief and comprehensive review for the major achievements with discussions...

Diatom oxygen isotopes applied for paleoclimatic reconstruction started from 1970s first for marine sediments and later extended to lacustrine sediment.As the technologies and methodologies involved are rather complicated,it developed slowly until recent years during which substantial progress had been made and great potential for broad applications to terrestrial sedimentary sequences was demonstrated.This paper is aimed to provide a brief and comprehensive review for the major achievements with discussions of the major problems remained. Diatom frustules are composed of amorphous silica through absorbing dissolved silica during growth.It contains an outer layer with Si-OH bond and the inner tetrahedrally bonded portion structured with Si-O bonds.The Si-OH bond is easily broken and the oxygen is exchangeable with surroundings under natural low temperature conditions.The inner Si-O bond,however,is much stronger and requires much more energy to be broken,keeping the oxygen stable in most circumstances.Dissolution of diatom frustules can cause a significant change of diatom flora in sediments from its original living flora,or completely destroyed,especially under alkaline environment.Some diatom oxygen isotope studies suggest little discrimination between species in term of the isotopic composition.Isolation and purification of the diatom frustules constitute one of the crucial parts in diatom oxygen isotope analysis,as most of diatoms is a few to tens of μm in size and is commonly mixed with clay and silt minerals.A modified traditional separation method(heavy liquid separation) involves four major steps,removal of organic matter and carbonates,size differentiation through sieving,differential settling and removal of mineral particles using pipette,and heavy liquid separation and cleaning of chemical contaminants with distilled water.A newly applied method with a specifically designed device SPLITT(gravitational split-flow lateral-transport thin) isolates the diatom frustules by adjusting the water(or other liquid) flow speed and sorts out the preferred size and density fractions.Since pure diatom samples are rarely achieved,purity estimation is recommended for calibration of the measured isotope values.Oxygen isotope extraction techniques involve a series of processes to remove the exchangeable component of the hydrous layer.Currently,stepwise fluorination(SWF) method is routinely employed.For removal of the exchangeable component,stoichiometrically deficient reagent(ClF_(3) or BrF_(5)) is applied to the sample in the oxygen extraction line under low temperature and vacuum conditions.Subsequently,excessive reagent is used to the sample at high temperature for complete release of the oxygen.For isotope measurement,the yield oxygen is converted to CO_(2) by reacting with graphite in the same fluorination line.Some modifications to the SWF method include CIE(controlled isotope exchange) that is occasionally used in the case of the sample amount being insufficient for SWF method,and a method that removes the oxygen in the hydrous layer by dehydration at high temperature.A very recently developed method called iHTR(inductive high temperature carbon reduction),which dehydrates the sample up to above 1000℃ with a number of steps under vacuum,then disassociates the oxygen from Si-O bond by raising temperature to 1550~1750℃,and converts the oxygen to CO,instead of CO_(2),for isotope measurement.Although this method demonstrates a high accuracy and needs the sample amount one order less in magnitude than other methods,it has not been clarified whether isotope exchange occurred through atomic diffusion during dehydration at high temperature.A number of studies have constructed mathematical relationships between diatom isotope fractionation and temperature based on laboratory cultivation,though only a few species,natural lake diatom flora monitoring and diatom frustules from sediments.In spite of some debate,they show that the diatom oxygen isotopes are thermodynamically equilibrated with the water.However,the temperature fractionation effect suggested by different studies remains discrepant.Previous study shows a coefficient of 0.5‰/℃,while 0.2‰/℃ is demonstrated by most of later studies.No applicable diatom oxygen isotope thermometer has been established.The environmental factors that affect diatom oxygen isotope composition include temperature,oxygen isotope composition of the water in which the diatoms grow.These are more complicated in lake environment by the changes in precipitation,seasonal precipitation distribution pattern and variations of the pattern,precipitation-evaporation balance status.The dominant factor(s) must be identified for a sedimentary environment prior to the use of diatom oxygen isotopes as a paleoclimatic proxy.Up to date,a few studies use δ~(18)O_(diatom) as a paleotemperature indicator,while others refer the vertical variations of δ~(18)O_(diatom) in a sedimentary sequence to be an indicator of paleowater changes,for example,changes in amount of precipitation,precipitation-evaporation balance status(including dry event),water resources, or air mass source.Some fundamental problems need to be clarified urgently.These include 1) the effect of biogenic silica maturity on the oxygen isotope composition,2) the temperature fractionation effect of different species,3) the ecological studies of the diatom flora in a given lake,especially the seasonality and growing depth in the lake for the dominant and other notable members of the diatom flora,and 4) refining the mathematical expression of the relationship between δ~(18)O_(diatom) and temperature through more strict investigations.

硅藻氧同位素已日益成为陆相古气候重建的一种重要手段。文章在简述这一领域已取得的基本认识基础上,着重介绍了近年来的重要进展。主要进展包括:1)在硅藻的分离纯化方面,规范了重液分离法和新的重力差异流体分离法;2)完善了分步氟化法,创生了高温碳还原法的氧同位素制取技术;3)通过实验培养和天然湖泊监测实验,证实了硅藻氧同位素与温度的分馏平衡关系;4)湖泊硅藻氧同位素可以反映古温度、气候干旱事件和大气降水来源变化。同时,对目前硅藻氧同位素在湖泊沉积古气候研究中存在的主要问题作了讨论和展望。

 
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