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The integral equation is convergent for any conductivity distribution and frequency if iterative solvers are used.

提出一种应用迭代法求解新积分方程的迭代初值优化选择方法,并通过具体算例对比说明该方法可使频率域电磁测深三维模拟的计算效率得到有效提高。

For its effect and handiness magnetotelluric sounding is regarded as an important means to study deep structure.

由于大地电磁测深法勘探的轻便和有效,其作为深层构造研究的重要手段越来越受到重视。

In comparison with the HD measured configuration, it can't make full use of all poles. It takes much longer time to inverse only several sounding points, and in the calculation of partial derivatives Jacobian matrix.

与高密度电阻率法测量装置对比,其对电极的利用率较低,仅几个电测深点的反演就需要很长的时间。

This website offers the access to the Map Library Catalog of the library at the Princeton University, USA. It contains 300,000 maps and charts, aerial and satellite photographs; 100 relief models; 15 globes; 850 slides, which are related to geology, geochemistry, geophysics, climatology, natural resources, land use, soils, water resources, remote sensing, topography, political and cultural geography, physiography, bathymetry, transportation, navigation, urban and regional planning.

从本网站可以获得美国Princeton大学图书馆的地图收集的目录,共有300000张地图、图表、航片和卫星图片,100种简单模型,15个地球仪、850张幻灯片,内容包括地质、地球化学、地球物理学、气候学、自然资源、土地利用、土壤、水资源、遥感、地形、政治与文化地理学、自然地理学、测深法、置换传输、航海、城市与区域规划。

In order to overcome the disadvantage of volume effect and improve prospecting precision of MT, the paper puts forward a multi-channel telemetry method of stratum resistivity for linearity processing exploring depth and electromagnetic frequency in the local area, which creates a crresponding relationship between stratum resistivity and sounding line, and a multi-channel observation system is designed accordingly to explore the resistivity of underground ledge.

为克服大地电磁勘探中"体积效应"的缺点,提高探测精度,提出多道遥测地层电阻率法,该方法是在一个局部区域内,将勘探深度和电磁波周期进行线性化处理,使得地层电阻率和测深曲线建立对应关系,并据此设计了一个多道探测地下矿层电阻率的观测系统。

There are experimental results as follows:(1) Eriophorum comosum Nees shows strong cold resistance in plasmalemma permeability research. The lethal temperature of Eriophorum comosum Nees is the lowest LT_(50 in comparison with another two plants and is lower than -11.5℃ in August 2005 and December 2005; Soluble protein content of each plant is rising before or after cold hardiness. By SDS-PAGE, Protein band is analysed. Band quantity of Eriophorum comosum Nees is the most and its band color is darkest.(2) Soluble sugar content of three plants after cold hardiness are higher than before cold hardiness, moreover soluble sugar content after cold hardiness shows a decline and there is a narrow range in Eriophorum comosum Nees; Free Proline accumulation is changed by cold stress, and cold resistance is relative to free Proline accumulation; chlorophyll content of both three plants, including chlorophyll a, chlorophyll b and chlorophyll a/b, show a decline tendency along with the descent of temperature. Cynodon dactylon is highly sensitive to cold stress.(3) The soil POD and urease activities' absolute value of Erioophorum comosum Nees and Pogonatherum panideumHack were more than that of Cynodon dactylon before or after low temperature stress, especially POD activities.

实验结果表明:(1)在膜透性的研究中,丛毛羊胡子草抗寒性最强,采用电导率法测得半致死温度LT_(50最低,丛毛羊胡子草抗寒锻炼前后半致死温度LT_(50均小于-11.5℃;在可溶性蛋白含量研究中,抗寒锻炼前后三种植物的可溶性蛋白含量均增加,同时采用SDS-PAGE法,通过对蛋白条带分析,以丛毛羊胡子草条带数最多且着色深;(2)在可溶性糖的研究中,三种植物经抗寒锻炼后叶片可溶性糖含量都比抗寒锻炼前高,且经过抗寒锻炼后三种植物可溶性糖均呈下降趋势,丛毛羊胡子草可溶性糖含量下降较小;从游离脯氨酸含量可知,低温的胁迫影响了植物叶片游离脯氨酸的含量变化,植物的抗寒性与游离脯氨酸有关;低温胁迫下三种植物叶绿素含量随着温度的下降,叶绿素含量、叶绿素a、叶绿素b和叶绿素a/b均呈下降趋势,狗牙根对低温胁迫最为敏感;(3)低温锻炼前后,丛毛羊胡子草和金发草的土壤过氧化物酶与脲酶活性的绝对值均大于狗牙根的,特别是过氧化物酶,说明丛毛羊胡子草和金发草的酶活性大于狗牙根的。

From the results of research we can see that the WEM does have large advantages in improving the data quality for electromagnetic prospecting.

从试验的结果看,WEM法在提高电磁测深数据质量上具有很大的优势。

Based on an analysis of the frequency sounding curve of the CSAMT method (controlled source audio-frequency electromagnetic method), the authors have found that the curve intersects the curve in the transition region.

通过对卡尼亚视电阻率法频率测深曲线的分析,发现卡尼亚视电阻率与远区电场分量E的视电阻率曲线在过渡区出现相交的现象。

With deep pots and non weighting lysimeters,different soil moisture stresses are developed and maintained during turn green to maturing stage in winter wheat.

采用深桶栽培结合测坑法,从冬小麦返青至蜡熟期保持不同的土壤水分,分生育期对小麦的形态、生理和根系进行了测定。

The time series in Magnetotelluricscontains multiple spectra and often has unneeded natural electromagnetic signals and the interference of 50 Hz and its harmonic frequency.

大地电磁测深法野外观测得到的原始资料是包含多种频谱的时间序列,这种时间序列中常包含不需要的信息和50 Hz及其谐波的干扰。

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It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发,分析对称连杆曲线上鲍尔点的产生条件,提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品,年生产总值3000万美元,产品价廉物美、选料上乘、质量保证,深受国内外客户的青睐

The eˉtiology of hemospermia is complicate,but almost of hemospermia are benign.

血精的原因很,以良性病变为主。