Comparison of geostatistical and random sample survey analyses of Antarctic krill acoustic data   总被引：1，自引：1，他引：0  

Murray  A. W. A. 《ICES Journal of Marine Science》1996,53(2):415-421

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DEDICATED PRINCIPAL PROPERTIES FOR PEPTIDE QSARS: THEORY AND APPLICATIONS     

BERTSKAGERBERG  MICHAEL  SVANTEWOLD 《地理学报(英文版)》1990,(3)

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Oxide Mineralogy and Magnetic Properties of the Koidu Kimberlite Complex, Sierra Leone, West Africa     

S. E. Haggerty  R. B. Hargraves  L. A. Tompkins 《Geophysical Journal International》1990,100(2):275-283

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The calculated seismic properties of quartz mylonites with typical fabrics: relationship to kinematics and temperature     

David Mainprice  Martin Casey 《Geophysical Journal International》1990,103(3):599-608

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基桩承载特性的位移协调法分析研究   总被引：1，自引：1，他引：0  

何剑  陈文  曾金艳 《地球科学与环境学报》2003,25(2):27-30

介绍了利用位移协调法分析基桩承载特性的理论基础及计算方法。根据郑州某工程的静载试验资料,求得桩身荷载的传递函数,并利用该函数对基桩承载特性进行了分析。得出了可利用实测传递函数对同一场地的不同桩长、桩径或具有相同工程地质条件的不同场地的基桩进行承载特性分析的结论,以及桩端土层的力学指标和桩身弹模的选取对计算结果有较大影响的结论。  相似文献   

上海LAP-3000边界层风廓线雷达在强对流天气预报中的应用初探   总被引：12，自引：0，他引：12  

杨引明  陶祖钰 《成都信息工程学院学报》2003,18(2):155-160

在简要介绍上海LAP-3000边界层风廓线雷达探测原理和产品生成的基础上，利用近两年来搜集的资料，分析风廓线雷达资料短时强降水、龙卷风等局地强对流天气预报中的应用。结果表明，LAP-3000边界层风廓线雷达资料时间和空间分辨率较高，能有效揭示常规天气资料难以分析的一些大气动力和热力特征，在短时强对流天气预报中有较好的业务应用前景。  相似文献   

Acoustic damping of fast kink oscillations of coronal loops     

Yu. T. Tsap  Yu. G. Kopylova 《Astronomy Letters》2001,27(11):737-744

The damping of fast kink oscillations of solar coronal loops attributable to the radiation of MHD waves into the surroundings is considered in the thin-tube approximation. The oscillation damping decrement is calculated both by using a new energy method and by solving the dispersion equation for magnetic-tube eigenmodes. The two approaches are in good agreement under appropriate assumptions. The damping is negligible if MHD waves are radiated perpendicular to the magnetic field. The low Q factor of the loop oscillations in active regions found with the TRACE space telescope is associated with the generation of running waves that propagate along magnetic field lines.  相似文献   

The spectroscopic and interferometric orbit of Gliese 150.2     

Yu. Yu. Balega  A. A. Tokovinin  E. A. Pluzhnik  G. Weigelt 《Astronomy Letters》2002,28(11):773-777

We determined the spectroscopic-interferometric orbit of the binary red dwarf Gliese 150.2 with a period of 13.84 yr and a semimajor axis of 0.257 arcsec. Based on the orbital elements and on accurate measurements of the magnitude difference at several wavelengths, we estimated the spectral types and masses of the components (K0 V and M0 V, 0.79 and 0.55M _⊙) and the dynamical parallax of the binary (40.4 mas).  相似文献   

Paired‐basin comparison of hydrologic response in harvested and undisturbed hardwood forests during snowmelt in central Ontario: II. Streamflow sources and groundwater residence times     

S. S. Monteith  J. M. Buttle  P. W. Hazlett  F. D. Beall  R. G. Semkin  D. S. Jeffries 《水文研究》2006,20(5):1117-1136

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An evaluation of the universal soil loss equation and field techniques for assessing soil erosion on a tropical alfisol in western Nigeria     

P. W. Mtakwa  R. Lal  R. B. Sharma 《水文研究》1987,1(2):199-209

Four techniques for soil erosion assessment were compared over two consecutive seasons for bare-fallow plots and a maize-cowpea sequence in 1985 at IITA, Ibadan, Nigeria. The techniques used were: tracer (aluminium paint), nails (16 and 25), the rill method, and the Universal Soil Loss Equation (USLE). Soil loss estimated by these techniques was compared with that determined using the runoff plot technique. There was significantly more soil loss (P < 0·01) in bare-fallow than in plots under maize (Zea mays) or cowpea (Vigna unguiculata). In the first season, soil loss from plots sown to maize was 40·2 Mg ha^?1 compared with 153·3 Mg ha^?1 from bare-fallow plots. In the second season, bare-fallow plots lost 87·5 Mg ha^?1 against 39·4 Mg ha^?1 lost from plots growing cowpea. The techniques used for assessing erosion had no influence on the magnitude of soil erosion and did not interfere with the processes of erosion. There was no significant difference (P < 0·05) between soil erosion determined by the nails and the runoff plot technique. Soil loss determined on six plots (three under maize, three bare-fallow) by the rill technique, at the end of the season, was significantly lower (P < 0·05) than that determined by the runoff plot technique. The soil loss estimated by the rill method was 143·2, 108·8 and 121·9 Mg ha^?1 for 11, 11, and 8 per cent slopes respectively, in comparison with 201·5, 162·0, and 166·4 Mg ha^?1 measured by the runoff plot method. Soil loss measured on three bare-fallow plots on 10 different dates by the rill technique was also significantly lower (P < 0·01) than that measured by the runoff plot. In the first season the USLE significantly underestimated soil loss. On 11, 11, and 8 per cent slopes, respectively, soil loss determined by the USLE was 77, 92, and 63 per cent of that measured by the runoff plot. However, in the second season there was no significant difference between soil loss determined by the USLE and that determined by the conventional runoff plot technique.  相似文献