| 词汇 | example_english_ripple |
| 释义 | Examples of rippleThese examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors. Isolated ripples and some climbing ripples locally preserved. We are also reminded that the waves are ripples in the fabric of space and time produced by violent energetic events such as exploding supernovae. Relativistic interaction of rippled laser beams with plasmas. A series of modally inflected solos ripples over the orchestra and a pair of double-basses rumble the piece to an uncertain conclusion. A weak electron plasma wave is nonlinearly coupled to a rippled laser beam via a modified background electron/ion density. Two-fluid computations of plasma block dynamics for numerical analyze of rippling effect. Two-fluid computation of plasma block dynamics for numerical analyze of rippling effect. In places the bedding is distorted, convoluted or rippled. The sandstone layers exhibit symmetrical ripples having sharp crests and rounded troughs (sections 1, 7, 12). The coarse-grained lower part is chiefly composed of cross-bedded sandstone and the finer-grained upper part includes rippled silty sandstone and bioturbated sandy siltstone. Occasionally 1-1.5 m thick, rippled fine-grained sandy units are seen overlying this interbedded assemblage with a sharp contact. However, 'bursts ' are three-dimensional and, in the sea, have dimensions much greater than the wavelength of the ripples. Therefore, the arguments of $7 are applicable and slugs are expected to form a t a constant velocity, if they originate from these small ripples. A model of high-frequency ripples in the hippocampus based on synaptic coupling plus axon-axon gap junctions between pyramidal neurons. Coordinated interactions between hippocampal ripples and cortical spindles during slow-wave sleep. Vertical section of fine-grained purple sandstone bed showing climbing ripples with low angles of the stoss and lee surfaces. The wave shape with just some of the waves showing a sharp crest indicative of a separated flow was called a 'partially rippled' interface. The trackways are preserved on bedding planes of finely laminated planar and rippled siltstones. Model scales range from whole oceans to single stretches of shoreline, to groups of a few current ripples. Tracing the ripples requires an understanding of market and non-market interactions and institutions. Sand bedforms in these units are relatively thin (2-3 cm) dune foresets and ripples. However, as observed by many authors, ripples lengthen during their development, their final wavelength being controlled by the separated flow over the developed wave. As a result, the evolution equation of ripples is homogeneous in the unknown, and gives rise to an eigenvalue problem and instability. Comments on the distinctions between bars and ripples and on the similitude in laboratory experiments are made at the end. The formation of lower-r6gime bed waves (ripples, dunes) starts at very low sediment transport rates, where the sand particles move essentially as bed load. The viscous region near the rippled bed then lies beneath a large depth of inviscid fluid. If the water speed exceeds about twice the critical speed, vortex ripples will appear instead, which are steep enough to induce vortices behind the crests. In the foreground, we have a river with fish and ripples that spread to merge with the shoreline. Nonlinear interaction of rippled laser beam with unmagnetized plasma. In addition, the stop region has ripples which let through a small percentage of the unwanted part of a signal. In comparison, the calbindin bipolar terminals were sampled over a larger area and any minor ripples in the tissue will tend to broaden the peak. In the early 1990s, the discovery of new carbon atom formations in the mathematical shapes of geodesic spheres sent excited ripples through the scientific community. Although not implemented, it may be possible to smooth out such ripples by preprocessing the simulation data before per forming the geometric analyses presented here. The rise of the zero option can be explained as the dramatic imposition of a frequent lexical collocation rippling through the grammar. Oscillating flows over periodic ripples are of practical as well as scientific interest because of their relevance to beach processes. The flow above natural ripples is often turbulent and coupled to the motion of sand, hence theoretical analysis is extremely difficult. Half-wavelength sand bars, with ripples superimposed on them, were found to form along the bed. The first is comparing the mechanisms of ripples and bars. The fossiliferous coarse-grained sandy layers exhibit well-preserved symmetrical ripples on their tops (section 5). Almost one third of the sandstone beds are discontinuous and, of these, over a third comprise isolated sand ripples. The wavelength of the ripples decreases in that direction. However, in figure 4 observed ripples are plotted accordingly to their type : rollinggrain and vortex ripples. The surface of the seabed is here taken to be the mean surface averaged over ripples. On the other hand, further theoretical studies on the instability of oscillatory flows with vortices around steep ripples are worthwhile. Furthermore, they observed tthat the precursor to the creation of a slug is the formation of small ripples which suddenly evolve into a long wave. Lamps positioned below the transparent tanks illuminate patterns on the surface of the water as it ripples and splashes. In view of ongoing ultra shor t pulse layers, we make a comprehensive analysis on relativistic interaction of rippled laser beams with plasmas. The inequality (28) can be valid in the cold peripheral plasma where the ripples of the confining magnetic field are most pronounced. To illustrate one of the basic patterns of rippling an inductive proof of conjecture (2) is presented. The articles concern primarily demographic, genetic, social and ecological topics, the first of which illustrates the widening ripples of their interaction. Upper bedding planes are mostly erosive, but may contain ripples, where not cut. While a more general transformation can in principle be used by adding higher harmonics, (2.1) is sufficiently versatile for describing all ripples qualitatively. Nonlinear interaction of a rippled laser beam with an electrostatic upper hybrid wave in collisional plasma. Two-fluid computations of plasma bock dynamics for numerical analyze of rippling effect. The resulting checkerboard accumulation pattern has a wavelength two-thirds of that of the ripples. Further coalescence of these waves leads to the emergence of long solitary-like structures with ripples before the peaks. Sandstone beds are planar or undulating laminated, often grading up into ripples at top. Palaeoflow direction of the ripples is predominantly toward the south-southwest. In places in the bottom parts of these units, lenticular to wavy ripples show alternate palaeoflow direction. Rose diagrams indicate the azimuths of foreset dunes and ripples. Primary ripples are then formed to create form drag and thus reduce the skin friction. Using physically plausible estimates for these parameters the results of the analysis are in good agreement with observations for both ripples and dunes. The formation of ripples is not so well understood and there is no general consensus of opinion. The various theories can be broadly divided into stability theories and theories involving the propagation of ripples downstream from an initial disturbance. Increasing the amplitude of velocity oscillations, flow separates and vortex ripples develop. In the present paper we formulate a predictive theory of the formation of sand ripples under sea waves. There are other experimental data on rolling-grain ripples which have not been considered herein. The fine structure of ripples and another qualitative and many quantitative characteristics of the waves are predicted well. The ripples and sand bars preserved beneath these lacustrine deposits reflect rapid but low-energy flooding events within the basin. Sedimentary structures in the sandstone beds include planar lamination, cross-stratification, and symmetrically to asymmetrically rippled bed tops. The accumulation pattern clearly indicates the formation of bridges between transverse crests, which might lead to brick-patterned ripples. They show current elongation and often co-occur or intergrade with current ripples. The highest, rippled sands with dispersed convex-up shells indicate some reworking of this material during waning storm conditions. Occasionally rippled bands are calcretized, preserving the laminae. Two sediment transport models were considered: suspended load and vortex load, which accounts for suspensions in vortices shed over ripples. A 'distorter' object uses the fluid simulation data to distort the video, such that the motion of water sends ripples through the image. In this work, the explicit role for the nature of collisions on propagation characteristics of rippled laser beam is highlighted. Figure 1 shows a numerical example of the rippling formation in initially increasing plasma density irradiated by the neodymium laser light. The scattered field from different scattering features gives rise to secondary ripples. Analytical description of rippling effect and ion acceleration in plasma by a short laser pulse. The ripples on the surface indicate that it had recently been submerged. Similarly, ripples and gamma oscillations are mutually exclusive. In this way a hierarchy of ripples can be built up, each increasing in wavelength until some limiting factor such as the depth of flow becomes important. However, it is contradictory to the theoretical prediction and laboratory observations that the ripples need to reach a finite amplitude to bifurcate and, therefore, that the slugs should form downstream. The interaction between adjacent ripples is significant. The policy of academic massification spelled out for the future is one of linguistic disaster with all its ripples through the education system generally. The wave length of such ripples varies with the strength of the wind, which controls the distance travelled by each grain during saltation. The agreement seems satisfactory even though the theory somewhat underpredicts the wavelength of the ripples that appear. Other authors have performed experiments in which stable sandy nonseparated bottom configurations were not observed, which led to questioning the actual existence of rolling-grain ripples. Internally, these beds are frequently slumped and display dish and pillar structures; at the top of each bed are current ripples. Sedimentary structures were rarely observed except for some slump-structures, centimetre-sized ripples and bioturbation. Here we analyse theoretically such an instability by assuming that the ripples are rigid and smooth. In the channel casts, the sandstone packages are separated by oscillation wave ripples and microbial structures. The stratification is generally horizontal but often shows ripples, rarely cross-bedding. The differential equation for beamwidth parameter of rippled laser beam is evaluated. The heart lies free of ripples: some old well. Oboe key-clicks are used to portray rippling water which is heard almost the whole way through. Upon returning to the stationary frame of reference, these cells are precisely the viscous vortices oscillating to and fro high above the ripples. Here we study theoretically these cells for a lowviscosity fluid such as pure water over rigid ripples. These examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors. |
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