S.D. Priest, Editor, Hemispherical Projection Methods in Rock Mechanics, George Allen and Unwin, London (1985), p. 124 ii, £stg. 8.95 (paperback).     

William K. Smith 《Engineering Geology》1987,23(3-4):309-310

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On the definition of the flux of sensible heat     

S. Nicholls  F. B. Smith 《Boundary-Layer Meteorology》1982,24(1):121-127

The definition of the sensible heat flux is examined in the light of a paper published by Brook (1978). We show that the convergence of the flux defined in this paper and that of the standard definition are related to different quantities and that care must be taken to ensure that compatible definitions are used.  相似文献   

The Neogene to recent geology of Japan and its surrounding seas     

A.J. Smith 《Proceedings of the Geologists' Association. Geologists' Association》1982,93(2):161-178

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Reviews     

Isobel Clark  C. J. Readings  Peter J. Smith  L. Thomas 《Surveys in Geophysics》1983,5(4):409-412

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Case study of Pampa,Texas, multicell storms     

R. J. Hung  D. Y. Tsao  R. E. Smith 《Pure and Applied Geophysics》1983,121(5-6):1019-1034

Analysis of the Pampa, Texas, multicell storms showed prestorm environmental conditions of a strong horizontal convergence of moisture, mixing ratio 12 g/kg at the 850 mb level in the Texas Panhandle areas and strong winds with shear veering with height. Rapid-scan satellite imagery showed that the clouds penetrated above the tropopause and cloud-top temperatures were at least 4 to 9° C colder than the temperature of the tropopause. This formation and collapsing of high-mass-density overshooting cloud tops above the tropopause is characteristic of tornadoes in the middle portion of the United States.  相似文献   

Tidal and low-frequency net displacement in a coastal lagoon     

Ned P. Smith 《Estuaries and Coasts》1983,6(3):180-189

Four, 32-day current meter records from the Indian River lagoon, Florida, are used to characterize flow patterns along the Intracoastal Waterway in a coastal lagoon. The M₂ tidal constituent amplitude decreases from 58 cm per s near the Fort Pierce Inlet to only 7 cm per s in the interior of the lagoon. The relative importance of the nontidal variance in the current meter records increases from 0.6% to 26.6% of the total over the same distance. Plots of net displacement over time intervals of one to 16 days suggest relatively rapid flushing near the inlet, but in the interior of the lagoon periods of little or no net movement are increasingly common. Low-frequency motions at all four sites are coherent with windstress over time scales in excess of approximately two days.  相似文献   

An analytical and experimental study of zoning in plagioclase   总被引：1，自引：0，他引：1  

Robert K. Smith  Gary E. Lofgren 《Lithos》1983,16(2):153-168

A detailed electron microprobe study has been conducted on natural and experimentally grown zoned plagioclase feldspars. Discontinuous, sector, and oscillatory chemical zoning are observed superimposed on continuous normal or reverse zoning trends. The relative accuracy of 3 element (Na, Ca, K) microprobe traverses was found statistically to be 2 mole percent. Comparison of microprobe data on natural zoned plagioclase with zoned plagioclase grown in controlled experiments has shown that it may be possible to distinguish zonal development resulting from physio-chemical changes to the bulk magma from zoning related to local kinetic control on the growth of individual crystals.  相似文献   

The effect of air flow rate on the kinetics of flotation. Part 1: The transfer of material from the slurry to the froth     

A.R. Laplante  J.M. Toguri  H.W. Smith 《International Journal of Mineral Processing》1983,11(3):203-219

Bubble size distributions and flotation rates were determined as a function of air flow rate and frother concentration using a specially designed batch flotation cell. This cell permitted the unambiguous determination of the flotation rate from the slurry to the froth.Flotation rate constants were determined for different size classes of silica and galena. The flotation rate constants increased to a maximum and then decreased as air flow rate was increased. This maximum was predicted by a model which considered the effect of bubble size on both the total bubble surface area and the bubble-particle collision efficiency. This work shows that collision efficiency effects, shown to exist in single-bubble/single-particle systems, are also present in flotation systems where many bubbles and particles interact.A second model for hindered flotation is proposed which assumes that the particle-capturing bubble surface differs from the particle-retaining surface. This model predicts a sharp transition from hindered to free flotation. Experimental results are presented which agree well with those derived from the model.  相似文献   

Design and analysis of sampling experiments — A sensitivity approach     

H.W. Smith  J.A. Frew 《International Journal of Mineral Processing》1983,11(4):267-284

In this paper, the question of the sensitivity to experimental error of results derived from steady-state sampling experiments in separation (specifically mineral processing) plants is addressed. The main tools used are those of network topology and numerical linear algebra. The techniques developed permit the assessment of alternative experimental designs for sensitivity to experimental error, and the choice of insensitive methods of data reduction. The techniques are illustrated by analysis of two actual sampling experiments.  相似文献   

A PCSWMM/GIS-based water balance model for the Reesor Creek watershed   总被引：1，自引：0，他引：1  

D. Smith  J. Li  D. Banting   《Atmospheric Research》2005,77(1-4):388

This paper presents the results of a study of a watershed experiencing the pressures of land-use change resulting from urban development. The study was undertaken to facilitate an understanding of the water balance of the watershed by developing and implementing watershed procedures that are to be addressed in a watershed plan. There were three components to the research: firstly, observation of the effects of spatially distributed rainfall measurements and their effect on modelling were assessed. Secondly, the model was then calibrated by observing how differing techniques can discretize both the landscape (e.g. land-use and soil type) and incoming precipitation. Finally, a modelling methodology was developed to integrate a Geographic Information System and a hydrologic model (e.g. Storm Water Management Model) in a water balance analysis on a watershed basis. Results show that, under certain conditions, kriging spatially distributed rainfall values can help predict rainfall at ungauged (virtual) sites. Discretization of a watershed was found to affect the differences between measured and generated runoff volumes; however, this can be refined with calibration. It was seen that a strong correlation between measured and predicted rainfall values did not always guarantee a strong relationship between measured and generated runoff Recommendations include the use of a longer time series of rainfall, streamflow and predicted rainfall to observe temporal variations, and the need to assess the differences in modelled rainfall values generated by various surface interpolation methods (e.g. Inverse Distance Weighting and other kriging options) currently available in GIS packages.  相似文献