In this paper, some abrupt changes of the air temperature and precipitation from 1873 to 1989 in Shanghai and Beijing have been tested using Mann-Kendall method.

There are three zones of abrupt changes for high- and low-velocity bodies at depths below 200 km, which are at 30 km, 80 km and 130 km, corresponding to the depths of the Moho, the lithosphere and the asthenosphere, respectively.

The on-line identifications of nonlinear structures with Bouc-Wen model and structures with certain abrupt changes in the structural parameters are studied based on the new on-line identification algorithm for nonlinear structures.

This general trend of circulation evolution is marked by several abrupt changes at 8～7Ma, 3.4Ma and 1.2～0.9Ma, which is interpreted as the effects of the uplifted Tibet Plateau on the monsoonal circulation evolution and on the westerly circulation patterns over Late Cenozoic.

The fact that well correlation of short-term abrupt changes in our record to those from the sediments of the North Atlantic and ice core in Greenland reminds us of interconnection of the climatic events in the area prevailing over East-Asian monsoon to those in high latitudes. It is quite important for global Late Pleistocene climato-stratigraphy, the mechanism of East-Asian monsoon and the study dealing with the cause and response of global climate changes.

In this paper,we try to verify the effectiveness of heuristic segmentation algorithm in dealing with nonlinear time series by an ideal time series. Through detecting and analyzing the information of abrupt climate changes contained in recent 2000a's tree annual growth ring,we succeeded in distinguishing abrupt changes with different scales.

The results showed that,as long as the experiment maintained the temperature at 15.5-25 ℃ without abrupt changes,the pH value of reactor being 6.8-7.2,and with the alkalinity of the influent water being above 800 mg/L,UASB could run well and efficiently.

The results show that 1)the response amplitude of thedownstream cylinder is larger than that of the upstream one,2)the responses in critical Reynolds numbersare different from those in subcritical Reynolds numbers,and 3)There are abrupt changes of the dynamicresponses between L/D≤3.0 and L/D≥4.0.

Moreover, the general case of incident electron with any given momentum and spin state are studied numerically in detail, including the abrupt changes of spin direction and the two-step characters for reflection.

Abrupt changes in the molecular arrangement in the cluster were not found.

The shocks and contact discontinuities in such a case are domains with abrupt changes in the gasdynamics parameters.

Electrohydrodynamic flows in which there are zones of abrupt changes in the electric charge (while remaining bounded, by assumption) are investigated.

Under these conditions the Mn2+ ions strongly affected the DNA structure, which was reflected in abrupt changes in the CD spectra of DNA in the complex in the range of 260-290 nm.

In two previous papers[1,2] the author presented a generalized theory of local normal modes by introducing the method of slowly varying coefficients-a mathematical method to solve systems of first order linear differential equations with slowly varying coefficients, which are associated with problems of multi-coupled modes in irregular waveguides. However, the theory presented therein was not in a form to adapt itself to problems involving abrupt Changes of the waveguide parameters, which are inevitable in any...

In two previous papers[1,2] the author presented a generalized theory of local normal modes by introducing the method of slowly varying coefficients-a mathematical method to solve systems of first order linear differential equations with slowly varying coefficients, which are associated with problems of multi-coupled modes in irregular waveguides. However, the theory presented therein was not in a form to adapt itself to problems involving abrupt Changes of the waveguide parameters, which are inevitable in any practical transmission system. The purpose of the present paper is to consider such abrupt changes in the light of the above theory, so that the concept of local normal modes may be used to describe a broader class of problems.

The effects of variable load on the abrupt change of power output and discontinuity of oscillation of a. reflex klystron are investigated. The reflex klystron under study is of metal construction with integral resonant cavity operating in the "X" band.Analysis is made of the effects of overload, long line, multiple transits of electrons, parasitic resonance and imperfections in the design of the integral resonator.Among the factors which affect the load characteristics the most important one is shown to...

The effects of variable load on the abrupt change of power output and discontinuity of oscillation of a. reflex klystron are investigated. The reflex klystron under study is of metal construction with integral resonant cavity operating in the "X" band.Analysis is made of the effects of overload, long line, multiple transits of electrons, parasitic resonance and imperfections in the design of the integral resonator.Among the factors which affect the load characteristics the most important one is shown to be the design of the resonator, especially that of the distribution of side and gap capacitances as well as the curvature of the grids in the gap.The theory of parasitic resonance is briefly treated, and the experiments which have been performed to locate the parasitic resonance are described. Finally, a method of eliminating the parasitic resonance is illustrated.

In this work, the method of "Compressed Mass Plane" is used to draw from gravity data the depth contours of the Mehorovicic Discontinuity, the Conrad Discontinuity and the lower surface of the granite layer I beneath the central portion of the Himalayan Mountain Range. It can be seen from such contours that within the Himalaya region, the depth of the abovementioned crustal discontinuities varies rather abruptly. The Himalayan mountain range is situated on the sloping part of these crustal discontinuities. The...

In this work, the method of "Compressed Mass Plane" is used to draw from gravity data the depth contours of the Mehorovicic Discontinuity, the Conrad Discontinuity and the lower surface of the granite layer I beneath the central portion of the Himalayan Mountain Range. It can be seen from such contours that within the Himalaya region, the depth of the abovementioned crustal discontinuities varies rather abruptly. The Himalayan mountain range is situated on the sloping part of these crustal discontinuities. The crust in this region appears to have no "mountain root" and it has not reached the stage of isostatic equilibrium. However, in southern Tibet, north of the line running from Chu Zhong, Cha Dang to Ge Long Gong Ba (楚中,查当至戛隆公巴), the crust seems to be in isostatic equilibrium. The gradual uplifting at present of the Himalayan mountain region possibly involves the existence of forces relating to plate tectonic movements which may be considered as much stronger than that of the isostatic adjustments. Besides, earthquake source mechanism analysis giving a south-north direction for the axis of compression, and also in view of the thrusting character of a series of major faults observed in this region, it may be inferred that the Indian Plate moving northward pushes and collides with the Asian Plate. Again, all such facts as the epicentral distribution of shallow earthquakes of the Himalaya region forming belts, the structural peculiarity of the crustal layers, abrupt change of the depth of the Mohorovicic Discontinuity and finally the state of incomplete isostatic equilibrium constituent the tectonic background for the frequent occurrence of strong earthquakes in this region.