铟-1-苯基-3-甲基-4-苯甲酰基吡唑啉酮-5-安替比林体系络合吸附波的研究     

张玲金  卢巽珍 《岩矿测试》1998,17(1):48-50

在ｐＨ４５的ＨＡｃ＿ＮａＡｃ介质中,Ｉｎ＿１＿苯基＿３＿甲基＿４＿苯甲酰基吡唑啉酮＿５（ＰＭＢＰ）＿安替比林体系于－０５７Ｖ（ｖｓ．ＳＣＥ）处产生一良好的极谱波。Ｉｎ在００１～０５ｍｇ／Ｌ与波高呈线性关系。检出限０１μｇ／Ｌ。实验证明,该波为可逆的络合物吸附波,络合物中的电还原体为中心离子Ｉｎ３＋。Ｉｎ３＋与ＰＭＢＰ的组成比为１∶２。在不改变峰电位的情况下,安替比林使Ｉｎ＿ＰＭＢＰ＿ＨＡｃ＿ＮａＡｃ体系的极谱波高显著增加,波形变得非常尖锐对称。探讨了安替比林增敏作用机理。  相似文献   

声频应力波在锚杆锚固状态检测中的应用   总被引：17，自引：0，他引：17  

汪明武 《地质与勘探》1998,34(4):54-56,59

研究了声频应力波法快速普查检测锚杆锚固状态的原理及评价分级标准,并将它成功地应用于潘一矿锚杆施工质量的检测,得出了利用声频应力波快速普查检测锚杆锚固质量的方法是切实可行和有效的。  相似文献   

The Wave Energy Concentration at the Agulhas Current off South Africa   总被引：3，自引：0，他引：3  

Lavrenov  I. V. 《Natural Hazards》1998,17(2):117-127

The case of a freak wave collision with the ship in the Agulhas current is described. The explanation of the appearance of the freak wave as a result of wind-wave transformation in the Agulhas current is given. Swell is captured and intensified by the counter-current and is located in the neighbourhood of the maximum value of the current velocity, as a result of which there is a great concentration of wave-energy density. The superposition of wind and sea with swell transformed by the current promotes the formation of the freak waves. Using a simple mathematical analysis, an optimal ship track is proposed which could reduce the risk of collision with a freak wave.  相似文献   

Sensitivity of frequency-dependent traveltimes to laterally heterogeneous, anisotropic Earth structure     

Li Zhao  & Thomas H. Jordan 《Geophysical Journal International》1998,133(3):683-704

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Seismic wavefield calculation for laterally heterogeneous whole earth models using the pseudospectral method   总被引：4，自引：0，他引：4  

T. Furumura  B. L. N. Kennett  & M. Furumura 《Geophysical Journal International》1998,135(3):845-860

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Model of a strong volcanic blast and a method of estimating the mass ejected     

N.N.Myagkov 《Geophysical Journal International》1998,133(1):209-211

A hydrodynamic model of a strong volcanic blast associated with large (caldera-forming) ash–gas-flow eruptions is presented. We show that the mass erupted from a vent influences considerably the damping of the shock wave. If the ejected mass flux is constant, the shock amplitude as a function of distance will decrease slower (in accordance with the inverse 4/3 power law) than that of an atomic explosion (the inverse cube power law). From the modelling, we extract a relation connecting the effective energy of a blast with the mass ejected during the blast phase. The mass released during the largest explosion of the 1883 eruption of Krakatau, and the lateral blast energy at Mount St. Helens on 1980 May 18 are estimated on the basis of the equation obtained.  相似文献   

On the solar cycle dependence of winds and planetary waves as seen from mid-latitude D1 LF mesopause region wind measurements     

C. Jacobi 《Annales Geophysicae》1998,16(12):1534-1543

At the Collm Observatory of the University of Leipzig LF D1 low-frequency total reflection nighttime wind measurements have been carried out continuously for more than two decades. Using a multiple regression analysis to derive prevailing winds, tides and the quasi-2-day wave from the half-hourly mean values of the horizontal wind components, monthly mean values of mesopause wind parameters are obtained that can be analysed with respect to long-term trends and influences of solar variability. The response of the prevailing wind to the 11-year solar cycle differs throughout the year. While in winter no significant correlation between the zonal prevailing wind and solar activity is found, in spring and summer a negative correlation between the TWC can be seen from the measurements. This is connected with stronger vertical gradients of the zonal prevailing wind during solar maximum than during solar minimum. Since the amplitude of the quasi-2-day wave is dependent on the zonal mean wind vertical gradient, this is connected with a positive correlation between solar activity and quasi-two-day wave activity.Paper Presented at the Second IAGA/ICMA (IAMAS) Workshop on Solar Activity Forcing of the Middle Atmosphere, Prague, August 1997  相似文献   

Incoherent scatter radar observations of AGW/TID events generated by the moving solar terminator     

V. G. Galushko  V. V. Paznukhov  Y. M. Yampolski  J. C. Foster 《Annales Geophysicae》1998,16(7):821-827

Observations of traveling ionospheric disturbances (TIDs) associated with atmospheric gravity waves (AGWs) generated by the moving solar terminator have been made with the Millstone Hill incoherent scatter radar. Three experiments near 1995 fall equinox measured the AGW/TID velocity and direction of motion. Spectral and cross-correlation analysis of the ionospheric density observations indicates that ST-generated AGWs/TIDs were observed during each experiment, with the more-pronounced effect occurring at sunrise. The strongest oscillations in the ionospheric parameters have periods of 1.5 to 2 hours. The group and phase velocities have been determined and show that the disturbances propagate in the horizontal plane perpendicular to the terminator with the group velocity of 300–400 m s^–1 that corresponds to the ST speed at ionospheric heights. The high horizontal group velocity seems to contradict the accepted theory of AGW/TID propagation and indicates a need for additional investigation.  相似文献   

Nonlinear magnitude frequency relation and two types of seismicity systems     

Shi-Jun Chen  Zhi-Cai Wang  Jiu-Qing Tao 《地震学报(英文版)》1998,11(2):207-218

A nonlinear magnitude frequency equation has been derived in this paper on the assumption that all seismicity systems hold fractal characteristics, and according to the differences of relevant coefficients in the equation, seismicity systems are classified into two types: type I, the whole earthquake activity is controlled by only one great unified system; type II, the whole earthquake activity is controlled by more than one great system. One type of seismicity system may convert to the other type, generally. For example, a type I system will change to a type II system prior to the occurrence of a strong earthquake in North China. This change can be regarded as an index for earthquake trend estimation. In addition, the difference between b value in nonlinear magnitude frequency equation and that in linear equation and the term dΔM related to the coefficients of nonlinear terms obtained in this paper are proved to be a pair of available parameters for medium short term earthquake prediction.  相似文献   

Site amplifications in the city of Benevento (Italy): comparison of observed and estimated ground motion from explosive sources     

F. Marrara  P. Suhadolc 《Journal of Seismology》1998,2(2):125-143

A hybrid approach is applied to construct 2-D synthetic seismograms for explosive sources. The computation of the signals has been performed with a hybrid technique, that couples the modal summation method, describing the P-SV propagation from the source to a target area, to the finite difference method, allowing the computation of the 2-D response of the target area. We use this technique to study the site response in the city of Benevento (Southern Italy). The results are compared both with those obtained for the same model, but considering an extended double-couple source and SH wave propagation and with those derived from a direct analysis of experimental data obtained during the Benevento Seismic Risk Project, funded by the Commission of European Communities. The type and depth of the source and the source-receiver distance can provide different excitations, but the response of the target area, in terms of ratios of response spectra, remains in general stable in the high frequency range (>2 Hz). The explosive source does not excite lower frequencies and is therefore unable to provide estimates of site effects in this frequency range. We also show that it is important to consider both P-SV and SH waves when assessing site effects. Finally, a very good definition of a structural model from geological data is fundamental in order to explain the observed data in the time domain. The observed data validate our synthetic modelling for evaluating the site effects and for a tentative seismic microzonation of the city of Benevento.  相似文献