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1.
Prof. F. S. Zanon 《Pure and Applied Geophysics》1952,22(1-2):97-107
Riassunto Si conferma, con un nuovo settennio di osservazioni, il valore già altre volte determinato dall'A. dellatemperatura critica di antèsi per ilTaxus baccata. E con un ventennio di osservazioni si determina il valore dell'analogo elemento biologico per ilPunica granatum.
Summary We confirm with a new septennium of observations the value that has been already other times determined by the author of the critical temperature of antèsi for the Taxus baccata and with a period of twenty years of observations we determine the value of the analogous biologic element for the Punica granatum.相似文献
2.
Priv.-Doz. Dr.-Ing. Otto Rosenbach 《Pure and Applied Geophysics》1952,22(1-2):1-36
Zusammenfassung Es wird untersucht, welche Aenderungen in der vertikalen Ausdehnung und der Dichte von rechteckigen Prismen erlaubt sind, ohne ihren gravimetrischen Effekt über gewisse Grenzen hinaus zu ändern. Formen von Massen bzw. von geologischen Körpern, die sich untereinander nur in geometrischen Dimensionen und in der Dichte unterscheiden, praktisch aber den gleichen gravimetrischen Effekt haben, werden gravimetrisch äquivalent genannt. — Es wird ein Beispiel durchgerechnet, in dem die Abmessungen solche sind, dass die rechteckigen Prismen als isostatische Kompensation einer Modell-Gebirgskette, von der Erstreckung der Alpen angesehen werden können. — Aus dem Ergebnis wird der Schluss gezogen, dass das Studium der Schwereanomalien keine klare Vorstellung von der Erstreckung des störenden geologischen Körpers unter dem Gebirgszuge liefern kann, selbst wenn seine Form bekannt ist. — In einem Anhang werden die für die Berechnung der gravimetrischen Aequivalenz nötigen Formeln mitgeteilt.
Summary It is examined which changes of the vertical extension and of the density of rectangular prisms are allowed without changing their gravity effects beyond certain limits. Forms of mass respectively of geological layers which differ from each other only in geometrical dimensions and in density but have practically the same gravity effect are called gravimetrically equivalent. — A synthetical example is treated in which the dimensions are such that the rectangular prism can be regarded as isostatic compensation for a pattern mountain range of the extension of the Alps. — It is concluded that the examination of the gravity anomalies cannot furnish a clear conception of the extension of the disturbing geological layer below the mountain range, even if its form is known. — In an appendix the necessary formulas for calculating the gravimetrical equivalence are given.相似文献
3.
Prof. Dr. Arnaldo Belluigi 《Pure and Applied Geophysics》1955,32(1):71-84
Riassunto L'A. esamina l'influenza e.m. della variazione dellospessore di un interstrato conduttivo in un, suolo altamente resistivo, per eccitazione del suolo stesso con c.a. (dipolo orizzontale), a bassa frequenza. Il problema ha la sua particolare importanza pratica nella valutazione del tonnellaggio dei minerali conduttivi, riconosciuti geoelettricamente.I calcoli, laboriosi, per addivenire a soluzioni soddisfacenti, portano a valutazioni analitiche del campo elettrico, tabulabili e diagrammabili. Si deduce, tra l'altro, una nozione di orizzonte elettrico (meno vaga di quella in uso di semplice reperto), quale strato sottile, conduttivo, esteso, di spessore critico, a reazione e.m. massima (nozione implicitamente acquisita, per altra via daH. P. Evans).L'A. dimostra dapprima che l'influenza e.m. dell'interstrato (ovviamente diminuente con la profondità), risente, a seconda la profondità stessa, in modo caratteristico della variazione del suo spessore,diminuendo sostanzialmente con l'aumentare di questo.Mentre per giaciture minerali poco profonde la valutazione del tonnellaggio di minerale si può fare in genere per difetto, per quelle relativamente più profonde tale calcolo riesce in genere più esatto (utilizzando entrambe le componenti del c.e. orizzontale in fase e in quadratura).Dato però che tale influenza e.m. è in funzione più propriamente del fattore di induzione, ci si avvale di questa proprietà per introdurre una nuova prassi (a variazione di frequenza) di rilevamento a pseudorisonanza a massimo effetto geoelettromagnetico.
I principali risultati del presente studio vennero comunicati alla Terza Assemblea Generale della Società Italiana di Geofisica e Meteorologia (Genova: 15–17 Aprile 1955). 相似文献
Summary The Author examines the e.m. influence of the thickness change of a conductive interlayer in a soil of high resistivity, for excitation of the soil itself with a.c. (horizontal dipole) of low frequency. The problem has its particular practical importance in the estimation of the conductive minerals tonnage, geoelectrically, acknowledged.The laborious calculations, for obtain satisfactory solutions, lead to analytical estimations of the electric field, that may be expressed in tables and diagrammes. The Author deducts, among other, a notion of electrical horizon as conductive and extensive thin layer of critical thickness (notion already acquired, in other way, byH. P. Evans).First the Author demonstrates that the interlayer e.m. influence (obviously decrising with depth), feels, according to the depth itself, in a caracteristic way of the change of its thickness,decrising substantially with incrising of this. While for little deep mineral layers the estimation of the mineral tonnage can be made generally for defect, for those relatively deeper such a estimate is usually more exact, utilizing both the components of e.c. (horizontal) in phase and in quadrature. Given, therefore, that such e.m. influence is more properly a function of the induction factor, is made use of this property to introduce a new praxis (to frequence variation) of socalled pseudoresonance to maximum geoelectromagnetic effect.
Zusammenfassung Der Verf. untersucht den elektromagnetischen Einfluss, den die Aenderung der Mächtigkeit einer in einem Boden von hohem spezifischen Widerstand befindlichen leitenden Zwischenschicht infolge Erregung durch Wechselstrom mit Niederfrequenz (wagerechter Dipol) ausübt. Das Problem ist in parktischer Hinsicht besonders wichtig bei der Schätzung des Tonnengewichtes der leitenden geoelektrisch festgestellten Mineralien.Die für eine zufriedenstellende Lösung mühevollen Berechnungen führen zu analytischen Schätzungen des elektrischen Feldes, die in Form von Tabellen und Diagrammen zusammengestellt werden können. Es lässt sich daraus u.a. die Kenntnis eines elektrischen Horizontes ableiten (die klarer ist als die übliche einer einfachen Feststellung) in Form einer leitenden, ausgedehnten dünnen Schicht von kritischer Mächtigkeit und von höchster elektromagnetischen Wirkung (diese Kenntnis wurde auf anderem Wege vonH. P. Evans indirekt abgeleitet).Zuerst ergibt der Verf. den Nachweis, dass der elektromagnetische Einfluss der Zwischenschicht (der selbstverständlich mit der Tiefe abnimmt), je nach der Tiefe selbst, in kennzeichnender Weise von der Aenderung ihrer Mächtigkeit abhängt und zwar, dass er wesentlich mit ihrer Zunahmeabnimmt. — Während man für die wenig tiefen Minerallagerungen das Tonnengewicht meist ungefähr abschätzen kann, erhält man für verhältnismässig tiefere Lagerungen gewöhnlich eine genauere Berechnung; indem beide, sowohl gleichphasigen als auch um 90 Grad verstellten Komponenten des elektrischen (wagerechten) Feldes berücksichtigt werden. Da aber dieser elektromagnetische Einfluss eigentlich eine Funktion des Induktionsfaktors ist, benutzt man diese Eigenschaft zur Einführung einer neuen Vermessungsweise (mit Frequenzänderung), die sogenannte Pseudoresonanz mit höchster geoelektromagnetischer Wirkung.
I principali risultati del presente studio vennero comunicati alla Terza Assemblea Generale della Società Italiana di Geofisica e Meteorologia (Genova: 15–17 Aprile 1955). 相似文献
4.
Prof. Dr. H. Israël 《Pure and Applied Geophysics》1955,31(1):162-168
Zusammenfassung Die elektrischen Wirkungen des Wettergeschehens lassen sich z.T. als veränderliche Schaltelemente, z. T. als Generatoren im luftelektrischen Stromkreis deuten. Es werden die einzelnen Möglichkeiten besprochen und im Ersatzschaltbild dargestellt. Die Kondensationskerne erweisen sich dabei als wesentliches Bindeglied luftelektrisch-meteorologischer Zusammenhänge, wie an einigen Untersuchungsergebnissen im Hochgebirge (Jungfraujoch) gezeigt wird. — Nach Radiosondenmessungen des luftelektrischen Feldes vonKoenigsfeld ergibt sich die grösste Variabilität des Feldes in einer Höhe von einigen km, was als Auswirkung des vertikalen Massenaustausches auf den Kondensationskerngehalt in verschiedenen Höhen zu deuten ist.
Summary The electrical effects of the weather phenomena can be interpreted partly as variable elements of connections, partly as generators in the atmospheric electrical circuit. The various possibilities are discussed and represented by the equivalent wiring diagram. The condensation nuclei prove hereby as essential link between atmospheric electrical and meteorological relationships as is shown from some results of investigations carried out in high mountains (Jungfraujoch). — According to radio sonde measurements of the atmospheric—electric field made byKönigsfeld the greatest variability of the field occurs in an altitude of a few km which is to be interpreted as the effect of the vertical mass exchange on the content of condensation nuclei in various heights.相似文献
5.
Summary
Reitan's data on precipitable water vapour over about 45 stations of the U.S.W.B. network are correlated with altitude and average station temperature values. Computations are carried out following a simple proposed model which is found to be obeyed with reasonably good approximation on average monthly and seasonal scales.Contribution of the Centro-Nucleazione Aerosoli of the National Research Council of Italy,Rome, Via Vettore 4. 相似文献
6.
Summary Spectral studies of a number of micropulsation pearl records are described. In particular, polarization, recurrence tendency, phase modulation and bandwidth were determined. Although each of the five records studied showed some tendency for pearls to recur, this tendency appears to depend inversely on magnetic activity. Bandwidth to frequency ratios are comparable to those observed byHolmberg in pulsations having periods of 20 seconds and 70 seconds.Theories of pearl sources are compared with observations. Agreement is observed in some aspects, but is lacking in others. 相似文献
7.
Summary The possibility of solving the stationary heat equation with the convective term is demonstrated in the case that the velocity field of the continuum, and the temperature and heat flow on the Earth's surface are known, and that an assumption is made about the magnitude of heat flows on another part of the boundary of the two-dimensional region being investigated, whereas no boundary condition is imposed on the remainder of the region's boundary. The problem has been solved numerically for a kinematic model of the lithosphere in the region of mid-ocean ridges, based on the assumption of a broad deflected convective flow moving at a distance of more than about 150 km from the ridge modelled as a plate.
aaa m u maua au na mna a, ¶rt;a um n m mua u a nmu u um mnama u mn nm. a ¶rt; amuau aamua ¶rt; amu ¶rt;um n¶rt;nu uu mn nma a a ma amuau a u a¶rt;a. ma na a u m¶rt; a ¶rt; uamu ¶rt;u um amu ¶rt;u-auu m, a a n¶rt;mauu u ma mu nma a amu m ma nau 150 ¶rt;u auma nm.相似文献
8.
Dr. M. G. El-Fandy 《Pure and Applied Geophysics》1952,21(1):58-62
Summary The frequency of mist and fog over the Eastern Mediterranean generally shows a maximum in the warm season and a minimum in winter. It is also less on the African coats than on the northern shores. In the warm season visibility may also deteriorate as a result of the spreading out of heat-haze, notably by midday, or by dust-haze. An outline of the distributions favouring these weather features has been given. It has also been shown that apart from these features, visibility may deteriorate as a result of suspended dust blown from the African deserts by southerly winds in front of travelling depressions in winter or in spring. Visibility may also deteriorate as a result of heavy precipitation in a Cyprus low in winter. 相似文献
9.
Summary The hypothesis of an expanding Earth is discussed on the basis of lunar laser ranging It is provcd that the given data do not indicate a secular increase in the principal moment of the Earth's inertia which would have to occur if the Earth were really expanding.
¶rt;amunma au u mu u ammuu a¶rt;u u ¶rt;a n a auu . aam, m n mu ¶rt;a m umamu amaua ma uuu u, m ¶rt; nmmam auu, u n¶rt; u m.相似文献
10.
Prof. Dr. Hellmut Berg 《Pure and Applied Geophysics》1952,21(1):71-85
Zusammenfassung In der Klimatherapie kommt neben dem Höhenklima dem Meeresklima eine besondere Bedeutung zu, die wesentlich in den spezifischen Eigenschaften des maritimen Kernaerosols begründet liegt. Praktisch kommt für die Klimakuren nur eine wenige Kilometer breite Uebergangszone vom offenen Meer zum Festland in Frage, die neben den vorgelagerten Inseln lediglich einen kaum 5 km breiten Küstenstreifen umfasst. Das ist die Zone des Insel- und Küstenklimas. Innerhalb dieser Zone ändern sich die Klimaeigenschaften sehr stark, so dass es nicht gleichgültig ist, wo man Heilstätten baut. Insbesondere nehmen die Temperaturverhältnisse und die Aerosoleigenschaften längs der von der Wasserlinie bis zu den Dünen reichenden Strandzone auf einer Strecke von etwa 300 m ganz andere Werte an. Für die Therapie kommen vor allem Formen der extrapulmonalen Tuberkulose (Knochen-, Gelenk- und Drüsentuberkulose), dann auch bestimmte Formen der Lungentuberkulose Erwachsener und allergische und konstitutionelle Ekzeme in Frage. Darüber hinaus hat das Insel-und Küstenklima besondere Bedeutung für die Erholung und für die Kräftigung. Die Wirkung läuft immer auf eine Umstimmung des Organismus hinaus. Organdeffekte und Herdinfektionen stellen eine Kontraindikation dar, sie müssen vor einer Klimakur saniert werden. Nicht die Krankheit wird angegangen, sondern es werden im kranken Organismus Kräfte geweckt, die ihn mit der Krankheit fertig werden lassen. Deshalb ist es von Bedeutung, die Reaktionstypen zu kennen, bei denen das Insel- und Küstenklima eine Umstimmung des Organismus hervorrufen kann. Nur solche Typen sind für eine Klimakur geeignet.
Summary In climatic therapeutics sea climate ist most important besides the high altitude climate. This is primarily caused by the specific qualities of the maritime nucleus aerosol. Practically for climate treatment only a small transition zone of a few kilometers between the open ocean and the continent is usefull. It comprimes besides the islands only a stripe of nearly 5 km of the coast. This is the zone of the Isle- and Coast-Climate. Within this zone the qualities of the climate are changing very much. Therefore it does not care, where one builts hospitals. Especially the temperatures and the qualities of the aerosol are changing to very different values along the beach from the waterline to the dunes (about 300 m). To the treatment are suitable primarily kinds of extrapulmonary tuberculosis (tuberculosis of bones, joints and glands), and certain kinds of pulmonary tuberculosis of adults and allergic and constitutional eczema. Beyond it the Isle- and Coast-Climate is most important for recreation and strengthening. The effect is always caused by tuning anew the organism. Organ defects and special infections are a contraindication, they must be repaired before beginning a climate cure. Not the illness is subdued, but in the ill organism forces are alarmed, which let him win the victory over the sickness. Therefore it is important to know the types of reaction of men, which are supposed to have a tuning anew of the organism by the Isle- and Coast-Climate. Only these types of men are fit for a climate cure.相似文献
11.
Summary A method of spectral analysis based on the prediction of the signal by means of AR parameters is proposed. The essence of this method ranks it between the classical methods of spectral analysis and the method of maximum entropy. For sufficiently high SNR its resolution is higher than that of the classical methods. The new method enables power and phase spectra of the signal to be determined, and provides a better determination of the power spectrum amplitude. than the method of maximum entropy. A regularization procedure is presented which abolished the instability of the prediction filter, obtained by the least-squares method.
¶rt; n nma aaua, a a n¶rt;aauu uaa n amu naam. mm n m ¶rt;au aumu auu m¶rt; nma aaua nuu u¶rt; u m¶rt;a aua mnuu. n a¶rt;am n aa nm n au auuu m¶rt;au nu aau n ¶rt;mam u mu ua . nm mu ua n¶rt;m a¶rt;, m¶rt; aua mnuu. muu m m¶rt;a aua mnuu n¶rt; n nma aaua nm n¶rt;m m a nm ua. aam n¶rt;aa uma um m¶rt; auu a¶rt;am, m unaa uau ¶rt; ¶rt;u mu am u.相似文献
12.
a mamumuu m, m n¶rt; u a¶rt;a au, um ¶rt;umuau. aam, m a au ¶rt;unu a¶rt;a au n ¶rt;umuauu u n¶rt; nu a an¶rt; a u uu aa
,¶rt; h a ¶rt;umuauu. 相似文献
13.
Numerous studies of magnetic fluctuations with a zero mean-field for small magnetic Prandtl numbers (Pr
m
1) show that magnetic fluctuations cannot be generated by turbulent fluid flow with the Kolmogorov energy spectrum. In addition, the generation of magnetic fluctuations with a zero mean-field for Pr
m
1 were not observed in numerical simulations. However, in astrophysical plasmas the magnetic Prandtl numbers are small and magnetic fluctuations are observed. Thus a mechanism of generation of magnetic fluctuations for Pr
m
1 still remains poorly understood. On the other hand, in astrophysical applications (e.g., solar and stellar convection zones, galaxies, accretion disks) the turbulent velocity field cannot be considered as a divergence-free.
The generation of magnetic fluctuations by turbulent flow of conducting fluid with a zero mean magnetic field for Pr
m
1 is studied by means of linear and nonlinear analysis. The turbulent fluid velocity field is assumed to be homogeneous and isotropic with a power law energy spectrum ( k
–p
) and with a very short scale-dependent correlation time. It is found that magnetic fluctuations can be generated when the exponent p > 3/2. It is shown also that the growth rates of the higher moments of the magnetic field are larger than those of the lower moments, i.e., the spatial distribution of the magnetic field is intermittent. In addition, the effect of compressibility (i.e., u 0) of the low-Mach-number turbulent fluid flow
u
is studied. It is demonstrated that the threshold for the generation of magnetic fluctuations by turbulent fluid flow with u 0 is higher than that for incompressible fluid. This implies that the compressibility impairs the generation of magnetic fluctuations.
Nonlinear effects result in saturation of growth of the magnetic fluctuations. Asymptotic properties of the steady state solution for the second moment of the magnetic field in the case of the Hall nonlinearity for the low-Mach-number compressible flow are studied. 相似文献
14.
Keh-Gong Shih 《Pure and Applied Geophysics》1971,85(1):298-308
Summary The approximate solution for the disturbance of a uniform heat flow in a homogeneous semi-infinite medium by an object of different thermal conductivity buried in it is generally used in the interpretation of heat flow anomalies on the ocean bottom. In order to know the accuracy of the approximate solution, a comparison between the approximate solution and the exact solution is given in the case of a very long horizontal cylinder in a semi-infinite medium. The computed results indicate that the two solutions agree to within 10% whend>1.3 and 0.5<<2, whered is ratio of the depth to the radiusR
0 of the cylinder and is the factor of the contrast of the thermal conductivities between the medium and the body. As for the cases when 1 and 1, the same accuracy can be obtained only whend>2. A similar approach is also applied to the case of a spherical conductor in a semi-infinite medium by using a bispherical harmonic solution. The results of both the bipolar solution and the bispherical solution show that when 1 andd1, the vertical thermal gradient at the surface of the semi-infinite medium is always positive and tends to zero, but a negative vertical gradient may be obtained for the approximate solutions. 相似文献
15.
u¶rt;m n uu ¶rt;u m n u ma n¶rt;aa, nu m¶rt;u u ¶rt;uau. n nuu uu ¶rt;u m n ¶rt;a¶rt; nu NoNo VI, VII. u au u n m a
(x, H), ¶rt;auu an¶rt;u ¶rt;u m ¶rt; m¶rt; nu, u mua m nuu
(H), aamuu an¶rt;u m a mua ¶rt;¶rt; uu ¶rt;uua u a. u a ¶rt;u m
(x, H) amm ¶rt;uuu (u) a m¶rt; nu. m¶rt; u, auuu aau, om aamuam muau an¶rt;u ¶rt;u m, uu , n m u m nu aamuu a nmu, am ma a¶rt;am aa uu ¶rt;u m. aa u a¶rt;u n nu NoNo VI u VII u umuu ¶rt;a. mua m nu
(H) num m ¶rt;u amu aua u anam um, ¶rt;a amu ¶rt;aua u ¶rt;- nma (nu No VII). ma ¶rt; ¶rt; aua, maa numa nm m u numa nm ma¶rt;um, a unaa nuu umnmauu a¶rt;uu ¶rt;uau amu aua. 相似文献
16.
Riassunto Viene descritto ed illustrato un nuovo procedimento di registrazione del moto ondoso marino, il quale consiste sostanzialmente nel trasformare l'escursione verticale che subisce la superficie del mare nella compressione o dilatazione di una massa d'aria sovrastante racchiusa in un tubo verticale munito superiormente di opportuna membrana sensibile. Un tale apparecchio, installato a Prà (Genova) dal-l'Istituto Geofisico dell'Università di Genova, funziona con successo da alcuni mesi. Segue un esame dei primi risultati ivi conseguiti, dal quale appare l'importanza del passaggio dei fronti freddi sul moto ondoso del mare.
Summary A new method for the recording of sea-wave motion is described and explained. It consists in having the vertical movement of the sea surface transformed into compression or expansion of a volume of air enclosed in a tube which is carrying on its upper part a sensitive membrane. This self-recording instrument, set up at Prà (Genoa) by the Istituto Geofisico dell'Università di Genova is functioning since several months already without giving rise to objections. Some first results obtained up now are also examided, from which it appears the importance of the passage of cold fronts.
Zusammenfassung Es wird ein neues Verfahren für die Registrierung der Meereswellenbewegung beschrieben und erläutert. Es besteht darin, dass der vertikale Gang der Meeresoberfläche umgewandelt wird in Kompression oder Expansion einer in einem Rohre befindlichen Luftmasse, welche am oberen Teil von einer empfindlichen Membran geschlossen ist. Dieser Gerät, vom Istituto Geofisico dell'Università di Genova in Prà (Genua) aufgestellt, arbeitet bereits seit einigen Monaten einwandfrei. Einige vorläufige Ergebnisse werden dann erläutert, wofür auf die Bedeutung des Durchganges von Kaltfronten hingewiesen wird.相似文献
17.
Libuše Ruprechtová Klára Mrázová Jaroslav Fiedler Reviewer A. Zátopek 《Studia Geophysica et Geodaetica》1984,28(3):286-293
Summary The calculation procedures for determining epicentre parameters of weak near shocks with foci in Poland are discussed and tested for explosions with known epicentres.
m m¶rt; ¶rt; n¶rt;u num a uu m num nmua n auauu, u mu a mumuu u, n muu ¶rt;au uu mau. au mam nam (a. 4) nu nuuu na 71 u m ¶rt;u n¶rt; ¶rt; a auu ¶rt;a [11].相似文献
18.
Marcela Laštovičková Karel Svoboda Рецензенm A. Janáčková 《Studia Geophysica et Geodaetica》1986,30(2):211-213
au aa ¶rt;a, nuau uuu ma n¶rt; u m muu uu, n¶rt; m¶rt;a nm (). u a m u ¶rt; uuu ma u muuu uuau.
Summary Analysis of the data set describing the chemical composition of the rocks and their electrical parameters was performed by the principal component method. Some relations between chemical composition and electrical parameters were established.相似文献
19.
¶rt; nm ¶rt; ama am nu¶rt;¶rt;a ma n naama um ¶rt;. 相似文献
20.
Yu. V. Gotselyuk M. S. Kazaryan S. N. Kuznetsov Karel Kudela Ivan Kimák Reviewer S. Fischer Reviewer J. Laštovička 《Studia Geophysica et Geodaetica》1988,32(2):187-198
Summary Precipitating electrons Ee>10 keV and Ee>30 keV and protons Ep=150 to 300 keV are analyzed using data obtained from the low-altitude polar-orbiting satellite Interkozmos-17 after the magnetic storm of December 2, 1977. On December 3, an isolated substrom occurred, and strong electron precipitation was observed in the midnigt sector, while the sequence of substorms of December 5 expanded its longitudinal extent from 22 MLT through the morning to 12 MLT. The different character of the precipitation, in the two cases mentioned, is discussed in relation to the changes of conditions for the generation of cyclotron instability as well as to the effect of particle injection. Proton precipitation occurred only in the night sector, most probably just inside the plasmapause.
¶rt; aau nau m Ee>10 u Ee>30 u nm Ep=150–300 n uu n uuma nmua n um m-17 n aum u 2. ¶rt;a 1977. 3. 12. nua uuaa u u nau m aumua m mo u. a n¶rt;amm 5. 12. nua auu ¶rt;m umaa, m m nau, a u m 22 MLT mu m ¶rt; 12 MLT. a aam nau nu¶rt; ¶rt; a ¶rt;am aa uu u ¶rt; uu um mumu u ¶rt;mu uuu amu. nau nm n¶rt;u m m u m a naana mu naa.相似文献