| 词汇 | example_english_pendulum |
| 释义 | Examples of pendulumThese 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. Despite some unavoidable differences between the theoretical and actual pendulums, the phenomena exhibited by them show good correspondence. When the lengths are equal, the energy in each mode is equally partitioned between the two pendulums. The work consists of six huge pendulums which are activated by the up and down movement of their hanging mounts. Without knowing more about the particulars -for instance, about engineers'concepts of pendulums - one cannot dare to give a definitive answer in this case. The other pendulums have different natural frequencies, so the driver has little effect. Again, pendulums were fitted with colourful sails and set in motion by an oscillating fan which ran continuously. Since the behaviour of the pendulums depends on the oscillating frequency of their mounts, a vari-speed electric motor is used. The first affects our considerations insofar as we will calculate accumulated phase differences for pendulums of substantially different amplitudes. Releasing the pendulums in opposite directions results in a counterswinging motion, while the system as a whole oscillates around the vertical axis (the cord). Our legs swing like pendulums, with adjustments so that we don't trip. Without knowing more about the particulars - for instance, about engineers'concepts of pendulums - one cannot dare to give a definitive answer in this case. All the pendulums are coupled together by the suspension. As the driver swings, it moves the suspension, which in turn moves the other pendulums. Here 0 is the damping, 0 is the characteristic frequency of the pendulum ! Figure 4 shows that it takes approximately 8 seconds for the pendulum's angle to become steady, and even longer for the cart's position to stabilize. Catapults and pendulums: the mechanisms of language acquisition. Catapults and pendulums : the mechanics of language acquisition. My wife tells me how much she hates pendulums and that she prefers balances. From the Hansard archive Example from the Hansard archive. Contains Parliamentary information licensed under the Open Parliament Licence v3.0 I am not sure whether it is the law of physics that pendulums swing too far. From the Hansard archive Example from the Hansard archive. Contains Parliamentary information licensed under the Open Parliament Licence v3.0 Inevitably, pendulums tend to swing one way and the other. From the Hansard archive Example from the Hansard archive. Contains Parliamentary information licensed under the Open Parliament Licence v3.0 I am saying only that sometimes in our politics, pendulums are pushed beyond their natural swing. From the Hansard archive Example from the Hansard archive. Contains Parliamentary information licensed under the Open Parliament Licence v3.0 Pendulums, in unbalanced hours, swing far. From the Hansard archive Example from the Hansard archive. Contains Parliamentary information licensed under the Open Parliament Licence v3.0 The pendulum is so suitable a device for investigating dynamics problems, it can seem that it had been invented for this purpose. Consider a long line of pendulums, all pointing straight down. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. A simple, so-called lateral harmonograph uses two pendulums to control the movement of a pen relative to a drawing surface. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Builders report that construction of ceiling-high pendulums is possible. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. However, the upper body is then just an inverted pendulum jointed around the hip. Thus, the system can be represented by an inverted pendulum. Similar effects could not be replicated in using the pendulum technique. To some degree the periods represent "swings of the regulatory pendulum" 8 but, as will become clear, these swings are not along just one dimension. In particular, our approach applies to the spherical pendulum. A simple mechanical example of parametric resonance is the excitation of a simple pendulum by periodic vertical motion of its point of support. The cost of implementing a motor into the simulation is response time for the pendulum to stabilize. Modes of theorizing about the pendulum show very clearly the differences in group concern. In this case, the model of the skier can be represented as a double inverted pendulum. The microphones are pulled back, switched on, and released over the speaker, and gravity causes them to swing back and forth as pendulums. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. On the uppermost mass are six coil- magnet actuators that are used to actively dampen the pendulums. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. A linear double pendulum model for the analysis of the symmetry approach used in the frontal plane algorithm. Displacing the pendulums from pointing straight down requires positive energy, which indicates that the squared mass of those particles is positive. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The entire traction drive is mounted on an assisting beam in the center of the bogie, and attached to the outer sides via two pendulums. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. In particular, he championed the use of pendulums for dowsing, also publishing arguments regarding the existence of ghosts and extraterrestrial involvement in human evolution. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. They were usually employed with vacuum pendulums on astronomical clocks. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. In these, a mechanical switch or a phototube turned an electromagnet on for a brief section of the pendulum's swing. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. A natural question is whether (non-trivial) monodromy also can be defined for non-integrable perturbations of the spherical pendulum. Other applications to prey-predator systems and to equations of pendulum-type will be given later. A useful mechanical analogy is developed by considering the effects of gravity modulation on a simple pendulum. A simple pendulum analogy, the stability characteristics of which are known, is shown to apply to the fluid layer system. On each side of the bridge, there are pendulums with crates. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. However, if a sufficiently large mass such as a mountain is nearby, its gravitational attraction should pull the pendulum's plumb-bob slightly out of true. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The opposite motion of the pendulums would cancel out any sideways forces on the support. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. In addition to clock pendulums, freeswinging seconds pendulums were widely used as precision timers in scientific experiments in the 17th and 18th centuries. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. No doubt the pendulum will eventually swing back, but we would all prefer progress to be cumulative rather than driven by fashion. The angle denotes the temporal deflection of the pendulum off the vertical axis. Here, the pendulum lines are vibrated from above (figure 16) using pumps made from modified woofers for strength and throw. In these, a switch or phototube energised an electromagnet for a brief section of the pendulum's swing. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The same is true for more complex types of pendulum: damped pendulums, driven pendulums, and so on. Such systems arise as models for the n-pendulum and were treated, in particular, in [9]. The model then brings physical knowledge to bear on the problem, through an equation normally used to describe a pendulum damped by friction. When the center of mass is plotted as a human walks, it looks like an inverted pendulum motion. The main difficulty is that the vertical posture of the biped without feet is unstable, as an equilibrium of an inverted pendulum. The black circle represents the point mass of the linear inverted pendulum model. We notice that at midswing the biped seems to perform like a compound inverse pendulum near equilibrium, which goes with a significant deceleration. How and where does one get the idea of investigating pendulum motion by means of inclined planes? Weighted pendulums were attached every to keep the wire from twisting. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Systems with two degrees of freedom, such as coupled pendulums and resonant transformers can have two resonant frequencies. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Control of the system requires that the cart holding the pendulum be moved by some mechanism. Conical pendulums had other uses unrelated to timekeeping. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The first electric clocks had prominent pendulums because this was a familiar shape and design. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. A very useful qualitative picture of the pendulum's dynamics may be obtained by piecing together such linearizations, as seen in the figure at right. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. He was best known for his work on temperature compensated pendulums and his use of the cylinder escapement. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The plus sign applies to the normal, hanging pendulum and the negative sign to the statically unstable, inverted pendulum. The compensator body acts as an unactuated pendulum in the frontal plane, preventing the walker from tipping over sideways. Wiggling one of the pendulums will create two ripples that propagate in both directions down the line. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Hermle manufactures mechanical mechanisms, battery operated mechanisms, accessories such as dial, pendulums and weight shells, as well as finished clocks. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. There is no attachment between the hyomandibular and the quadrate, and instead the hyoid arch suspends the two sets of jaws like pendulums. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Teachers and students experimented with natural materials like bulbs, batteries, pendulums or butterflies, ice cubes and earthworms. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. As in all pendulum movements, the oscillation between empire and the ethnic nation-state derives a great deal of its energy from its own swings. In mantel clocks, half-second pendulums, 25cm in long, or shorter, are used. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The numbered black dots denote evolution time in pendulum hours. The special case of the circular hoop is the forced pendulum. He also reported that a pendulum's period increases if the amplitude of its swing is increased to 40 degrees. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. There he taught logic, physics, and metaphysics from 1629 to 1632, and engaged in some experiments with falling bodies and pendulums. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Long-period pendulums enable seismometers to sense the slowest waves from earthquakes. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. By varying the frequency and phase of the pendulums relative to one another, different patterns are created. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Modern researchers have confirmed his suspicion that the pendulums were coupled by tiny back-and-forth vibrations in the wooden beam. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Perhaps they have not done so because the pendulum concerning exogenous influences has swung too far in the opposite direction. Up to the 1920s it still produced regulators with compensated pendulums and precision movements. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. As our eyes range the images of the streetscape, now and again they pause, a breath between phrases, a momentary stop of the pendulum. When considering the robot as an inverted pendulum, this case corresponds to horizontal paths of equal length behind and in front of the ankle joint. In this way, the pendulum had swung from 'under-supply' to 'over-supply' within a few decades either side of 1851. The mathematical model of the system was equivalent to a single nonvertical pendulum. In this first analysis, the oscillations were damped, and they were described through the classical equation of damped pendulum. What other prerequisites were needed to discover the characteristics of pendulum motion? 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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