Contribution to the experiment of axiomatizing the theory of turbulent diffusion     

Jiří Horák  Reviewer J. Navrátil 《Studia Geophysica et Geodaetica》1978,22(1):86-92

Summary The efforts to axiomatize the theory of turbulent diffusion, founded on the theory of Markovian random processes, are based on the principal logical algebraic aspects of the concept of modelling.Dedicated to RNDr. Jan Pícha, CSc., on his 60th Birthday  相似文献   

Thermal field in the Romanian Carpathian bend and some aspects of its interpretation     

Marius Visarion  Serban Veliciu  Mihai StefĂnescu  Reviewer V. Čermák 《Studia Geophysica et Geodaetica》1978,22(2):196-200

Summary Using heat flow and heat generation measurements together with deep seismic sounding and gravity data, a reasonable geothermal model has been constructed for the Romanian Carpathian Bend. At the level of the MOHO discontinuity the calculated temperatures exhibit conspicuous differences between inner and outer border of the Carpathian Bend and a horizontal gradient of 200–300 °C/100 km in the region is not to be excluded.Paper presented at the KAPG Symposium on Geothermics in Liblice, November 1976.  相似文献   

Contribution of the functional formulation of the problem of turbulence to the process of its algebraization     

Jiří Horák  Reviewer J. Navrátil 《Studia Geophysica et Geodaetica》1978,22(2):177-183

Summary The progressive development of the theory of turbulence is based on the formalism of characteristic functionals. Drawing on an incomplete analogy between the Hopf equation for these functionals and the equation for the quantized boson field, a system of fundamental principles of the theory of turbulence is proposed. This represents a set of statements which can be used in an attempt to classify the theory in the sense of its algebraization and, therefore, also its axiomatization.  相似文献   

Investigation of the damping of geomagneticPi2 pulsations using generalized spectral analysis     

Jaroslav Střeštík  Reviewer M. Hvoždara 《Studia Geophysica et Geodaetica》1978,22(2):154-159

Summary The method of spectral analysis has been modified to render the spectrum not only a function of frequency, but also of damping. The generalized spectra of damped geomagnetic pulsations, recorded at the observatories of Budkov and Dymer, are computed. The degree of damping of these pulsations in the X and Y-components at both stations is determined. The results are compared with results obtained using other methods.  相似文献   

Temperature properties of gravity meter Gs 15 No. 228     

Zdeněk Šimon  Stanislav Holub  Reviewer J. Pícha 《Studia Geophysica et Geodaetica》1981,25(2):107-123

uu mnam a anu nuuauma Gs 15 No 228 u a m mnam m nua a n u — . (5). au u n¶rt; a 5 u a ¶rt;mu annaam n aa uu mnam — a. 1. ¶rt;: uum mmamuauauma (1/191), mamuu mnam uum annaam (–5,24 ^–2/°C), mamuu mnam uum uum umauma (–1 ^–2/°C). m u anum¶rt; u a amm aamumuu u uu — a. 2, 3 u u. 6, 7. aua uu auau mnam a anuauma nu nu¶rt; 6 a — a n¶rt; mamu mnam uu.  相似文献   

Search for orthorhombic or higher symmetry in rocks     

Karel Klíma  Zdeněk Pros  Reviewer K. Pěč 《Studia Geophysica et Geodaetica》1981,25(3):245-261

Summary The properties of quadrics of stress and strain, which were derived from the eigenvectors of the matrix of elastic constants, are analysed for a medium with orthorhombic or higher symmetry. It was found that the orientation of the axes of the quadrics can be employed to determine the crystallographic axes of the medium. This formalism derived for minerals is used for finding the axes of the internal symmetry of a rock for which we assume a distribution close to that of the orthorhombic system with a view to the spatial distribution of P-wave velocities.  相似文献   

СРАВНЕНИЕ РЕЗУЛЬТАТОВ ГЛУБИННОГО СЕЙСМИЧЕСКОГО ЗОНДИРОВАНИЯ И ИЗУЧЕНИЯ ПОВЕРХНОСТНЫХ ВОЛН В РАЙОНЕ VII МЕЖДУНАРОДНОГО ПРОФИЛЯ     

Oldřich Novotný  Т. А. Проскурякова  Э. В. Воронина  Рецензенm V. Kárník 《Studia Geophysica et Geodaetica》1981,25(2):160-166

m¶rt; ¶rt;VII ¶rt;a¶rt; nu auma mmuu ¶rt;unu u . ¶rt;u mu u na mmua ¶rt;unua ua ¶rt; nu aa—ua, ¶rt;ma a¶rt; ¶rt;a.  相似文献   

Statistical properties of earth current pulsationsPc1 at the observatory of budkov in 1965–71     

Jaroslav Střeštík  Reviewer M. Hvoždara 《Studia Geophysica et Geodaetica》1981,25(2):181-191

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Kutnohorite from the Chvaletice pyrite and manganese deposit,east Bohemia     

Doc. Dr. L. Žák  Doc. Dr. P. Povondra 《Mineralogy and Petrology》1981,28(1):55-63

Summary Kutnohorite-quartz veins penetrate through a weakly metamorphosed Late Proterozoic sedimentary rhodochrosite carbonate in pyrite shales. Kutnohorite is pleochroic ranging from colourless () to pinkish grey (), =1.735, =1,543,d=3.066g·cm^–3;a ₀=4.852(1),c ₀=16.219(7) Å. A quantitative chemical analysis leads to the formula (Ca_0.95Mn_0.05)_1.00(Mn_0.64Mg_0.23Fe_0.13)_1.00(CO₃)_2.04. An electron microprobe scanning reveals considerable microscale inhomogeneity in cleavage rhombohedrons taken from a coarsely grained aggregate. It is mostly of the character of periodic fluctuations of the main element contents around an average value. There is a strong prevalence of an Fe+Ca–Mn+Mg antagonism, the extremes of compositonal differences lying in distances of 0.0X mm. The fluctuation maxima amount to about 9% for FeO, 6% for MnO, 3% for CaO, and 1.5% for MgO. In one of the samples even a two phase character with the above antagonism between the two phases was detected by X-rays. The inhomogeneities are due, partly at least, to the Fe-metasomatic processes that followed the formation of the kutnohorite by Alpine-paragenesis hydrothermal metamorphism.

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Kutnohorit aus der Pyrit-und Manganlagerstätte von Chvaletice (Ostböhmen)

Zusammenfassung Kutnohorit-Quarzgänge durchdringen ein schwach metamorphes jungproterozoisches sedimentäres Rhodochrositkarbonat in pyritischen Schiefern. Der Pleochroismus von Kutnohorit liegt zwischen farblos () und rosagrau (), =1,735, =1,543;d=3,066 g·cm^–3;a ₀=4,852(1),c ₀=16,219(7) Å. Die quantitative chemische Analyse des Minerals ergibt Formel (Ca_0,95Mn_0,05)_1,00(Mn_0,64Mg_0,23Fe_0,13)_1,00(CO₃)_2,04. Elektronenmikrosondenuntersuchungen zeigen eine starke mikroskopische Inhomogenität in den Spaltrhomboedern von einem grobkörnigen Kutnohoritaggregat. Sie ist meistens durch periodische Schwankungen der Hauptelementgehalte um einen Mittelwert hervorgerufen. Antagonistische Beziehungen von Fe+Ca und Mn+Mg überwiegen, die extremen Werte von Elementgehalten liegen in Abständen von 0,0X mm. Die höchsten Schwankungen erreichen etwa 9% für FeO, 6% für MnO, 3% für CaO und 1,5% für MgO. In einer Probe konnten röntgenographisch sogar zwei Kutnohoritphasen mit dem erwähnten Antagonismus zwischen den Phasen bewiesen werden. Die Inhomogenitäten wurden wahrscheinlich meistens durch Fe-metasomatische Vorgänge nach der Kristallisation des Kutnohorits während der hydrothermalmetamorphen Prozesse der Alpinen Paragenese hervorgerufen.

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With 4 Figures  相似文献   

Transmitted waves in the vicinity of the interface beyond the critical point     

Lothar Dresen  Stefan Freystätter  Jan Kozák  Ivan Pšenčík  Reviewer V. Červený 《Studia Geophysica et Geodaetica》1977,21(2):137-142

Summary The space (time) delay of transmitted waves in the vicinity of the interface beyond the critical point is investigated on two-dimensional seismic models of a low velocity channel; results of laboratory experiments are compared with the conclusions of the theory. The effect of the time delay in field measurements is demonstrated by means of two typical geological formations.  相似文献