It is shown that in the tropical easterly waves, if the easterly is intensified with increasing height, in the vertical shear of basic air flow provides easterly, then bad weather area is occurred to the west of the trough lines.

In this paper, we have derived the Burgers-KdV equation of an AGW in the vertical shear wind from the compressible hydrodynamic equations with towing effect by the reductive perturbation method and investigated its nonlinear properties.

Using the two-dimension reductive perturbation method in this paper,we derive the KdV equation of an acoustic gravity wave in the vertical shear wind,and prove that the AGW is the excited source of the medium scale TID.

本文利用二维约化摄动方法推导出垂直切变风场中声重波的 KdV 方程。 从而进一步证明中尺度 TID 的激发源是声重波这一尚未弄清的问题。

Based on the two variables of stress state, formulas for estimating the critical stable height of vertical cut slopes of unsaturated soils are established respectively for two cases in which suction is constant or linearly decreases with depth.

Methods The CCS of 886 cases (737 cases were noncardiac death,149 cases died of sudden cardiac death) were examined histologically using the method designed by the authors that tissues containing the SAN and AVN were cut along the long axes of the nodes in 1-2 block and the HB perpendicular to its long axis 2-4 blocks. The morphology and causes of death in CCS of two groups were also studied.

This paper discusses the actions and necessity of wafer grinding technology. According to quality of wafer surface grinding process, it studies principle of Creep-Feed and In-feed, bringing forward the principle and questions for design.

In this paper, the variation of spectral structure of acoustic gravity waves (AGW's) propagating through a region of vertical wind shear is investigated.

The disturbances arising in the background horizontal flow with vertical shear directed along the convective rolls are also calculated.

Surface gravity waves in deep fluid at vertical shear flows

Special features of surface gravity waves in a deep fluid flow with a constant vertical shear of velocity is studied.

This vertical shear of mean flow is to some extent weakened by thermal forcing.

The essential elements in the storm formaton are the strong horizontal shear in the cyclogenetic areas, a lack of vertical shear and warn sea surface temperatures.

The results given refer to the atmospheric depth of 1 g/cm2 for γ-rays and of 2, 4, 6 g/cm2 for electrons, at the geomagnetic vertical cut-off rigidity of 0.5, 2, 4.5, 10, 16 GV at solar minimum.

The horizontal limb starts from the centre of the vertical cut and ends above the attachment of the tendo achillis.

The remedial alternatives considered for normal conditions from 20 to 40?year periods were waste removal, vertical cut-off barriers, extraction wells and top capping.

The density of a placement is the maximum number of nets crossing each vertical cut.

It is a kind of aesthetic act that makes the sense appear, like a vertical cut in the sequential line of space and time.

The flow region around the wing-body combination is transformed by locad Jonkowski transformation into the one around a wing alone for the case with the body of circular cross section. The body-fitted "O" mesh around the transformed wing alone is constructed for each grid section by numerical conformal mapping, and is then, transformed back to form 3 -D bodyfitted mesh around the given wing-body combination. The transonic flow computation is performed by the use of conservative full-potential equation with exact...

The flow region around the wing-body combination is transformed by locad Jonkowski transformation into the one around a wing alone for the case with the body of circular cross section. The body-fitted "O" mesh around the transformed wing alone is constructed for each grid section by numerical conformal mapping, and is then, transformed back to form 3 -D bodyfitted mesh around the given wing-body combination. The transonic flow computation is performed by the use of conservative full-potential equation with exact boundary conditions and the efficient iteration scheme in finite difference method AF2. It is shown that only a few changes needed to expand the computer program for wing alone to cover wing-body combinations. The presented method is limited to the combinations which consist of the bodies of finite or infinite lengths with curved axes and circular cross sections, and the wing of arbitrary planform with finite wing tip. The computations for the combination with highly tapered and swept wing, nevertheless, is still a difficult problem.

In this study eight cases of easterly wave were analyzed, two classes of easterly wave identified according to the weather area related to the trough lines position of easterly wave. In the first class bad weather area is situated to the west of trough lines and in the other it is situated to the east of trough lines. This distributions of weather can be explained by the adjustment physical process of thermal wind. It is shown that in the tropical easterly waves, if the easterly is intensified with increasing...

In this study eight cases of easterly wave were analyzed, two classes of easterly wave identified according to the weather area related to the trough lines position of easterly wave. In the first class bad weather area is situated to the west of trough lines and in the other it is situated to the east of trough lines. This distributions of weather can be explained by the adjustment physical process of thermal wind. It is shown that in the tropical easterly waves, if the easterly is intensified with increasing height, in the vertical shear of basic air flow provides easterly, then bad weather area is occurred to the west of the trough lines. If the easterly is decreased with the height, so in the vertical shear of basic air flow is westerly one the bad weather is observed to the east of the trough lines.

An axisymmetric,nonhydrostatic numerical model is developed to simulate the meso-scale processes inside a tropical cyclone.Sensitivity of the model to the variables in the sea temper-ature,laitude and initial conditions is investigated,and the results of the numerical experimentsare similar to previous studies,besides,many simulated characteristics are consistent with radarand aircraft observation,such as the maximum of vertical and tangential wind ,the inflow concen-trated near the surface,the outward slope...

An axisymmetric,nonhydrostatic numerical model is developed to simulate the meso-scale processes inside a tropical cyclone.Sensitivity of the model to the variables in the sea temper-ature,laitude and initial conditions is investigated,and the results of the numerical experimentsare similar to previous studies,besides,many simulated characteristics are consistent with radarand aircraft observation,such as the maximum of vertical and tangential wind ,the inflow concen-trated near the surface,the outward slope of the eyewall updraft’etc. Also,the results show notonly the outward propagation of the meso rainbelts but the inward movement of the convectivering as well,The rate of theinward movement agrees well with the observation,Besides,the mod-el reveals clearly the lifecycle of the ring and the fluctuation of typhoon intensity.