单词 | boundary condition |
例句 | What were the “boundary conditions” at the beginning of time? A Brief History of Time: And Other Essays 1988-01-01T00:00:00Z One could say: “The boundary condition of the universe is that it has no boundary.” A Brief History of Time: And Other Essays 1988-01-01T00:00:00Z The no boundary condition, however, implied that these fluctuations were as small as they could be, consistent with the uncertainty principle. A Brief History of Time: And Other Essays 1988-01-01T00:00:00Z Further predictions of the no boundary condition are currently being worked out. A Brief History of Time: And Other Essays 1988-01-01T00:00:00Z Thus all the complicated structures that we see in the universe might be explained by the no boundary condition for the universe together with the uncertainty principle of quantum mechanics. A Brief History of Time: And Other Essays 1988-01-01T00:00:00Z One such possibility is what are called chaotic boundary conditions. A Brief History of Time: And Other Essays 1988-01-01T00:00:00Z As I said, I thought at first that the no boundary condition did indeed imply that disorder would decrease in the contracting phase. A Brief History of Time: And Other Essays 1988-01-01T00:00:00Z Rather, it is that the no boundary condition causes disorder to increase and the conditions to be suitable for intelligent life only in the expanding phase. A Brief History of Time: And Other Essays 1988-01-01T00:00:00Z Using the no boundary condition, we find that the universe must in fact have started off with just the minimum possible non-uniformity allowed by the uncertainty principle. A Brief History of Time: And Other Essays 1988-01-01T00:00:00Z However, a colleague of mine, Don Page, of Penn State University, pointed out that the no boundary condition did not require the contracting phase necessarily to be the time reverse of the expanding phase. A Brief History of Time: And Other Essays 1988-01-01T00:00:00Z The question is: is it implied by the no boundary condition, or is it inconsistent with that condition? A Brief History of Time: And Other Essays 1988-01-01T00:00:00Z I realized that I had made a mistake: the no boundary condition implied that disorder would in fact continue to increase during the contraction. A Brief History of Time: And Other Essays 1988-01-01T00:00:00Z To analytically solve such a problem, one would first find what the wave looks like at either side of the interface, and then employ electromagnetic boundary conditions to link the two sides together. Accelerating waves shed light on major problems in physics 2023-10-20T04:00:00Z To solve the differential equations, theorists need some initial values or “boundary conditions” for the master integrals. Method for solving notorious calculus problems speeds particle physics computations 2022-11-30T05:00:00Z These conditions are called boundary conditions, and finding the solution to the differential equation that satisfies the boundary conditions is called solving a boundary-value problem. Calculus, Volume 3 2016-03-30T00:00:00Z He described the circumstances which led to these crashes as a “boundary condition” which wasn’t considered in the design of the jets. Boeing has been ‘our own worst enemy’ on missed deadlines for 737 Max, CEO says. He just set a new timeline. 2020-01-22T05:00:00Z The tests teach us about climate responses to changes in boundary conditions, about intrinsic natural variability and about key physical processes. Testing Our Assumptions 2018-11-05T05:00:00Z Britain’s decision to leave the European Union, the company said, “will set new boundary conditions cutting through this highly integrated system.” Airbus Tells Britain It Wants Details of a Brexit Deal, or Else 2018-06-22T04:00:00Z That typically requires finding some symmetry that makes the boundary conditions simple or biting the bullet and doing the integration for some fixed values of the input variables. Method for solving notorious calculus problems speeds particle physics computations 2022-11-30T05:00:00Z Even when two boundary conditions are known, we may encounter boundary-value problems with unique solutions, many solutions, or no solution at all. Calculus, Volume 3 2016-03-30T00:00:00Z Model simulations and palaeoclimate records suggest that glacial boundary conditions affected the El Niño–Southern Oscillation2,3, a dominant source of short-term global climate variability. Southern Hemisphere climate variability forced by Northern Hemisphere ice-sheet topography 2018-02-04T05:00:00Z Increasing the number of women in engineering is a problem without clear boundary conditions. Sowing the Seeds of Diversity in Engineering 2017-12-08T05:00:00Z Developing a cybersecurity framework would begin by defining the limits or boundary conditions. Define Acceptable Cyberspace Behavior 2015-09-26T04:00:00Z By setting that extra parameter to infinity, they get a set of differential equations for which determining the boundary conditions is much easier. Method for solving notorious calculus problems speeds particle physics computations 2022-11-30T05:00:00Z This sort of discussion should continually feed into and set the boundary conditions for expert panels. CRISPR: Science can't solve it 2015-06-22T04:00:00Z We believe a AA credit rating provides us with the right amount of low-cost capital and good financing flexibility and is the right boundary condition. Chevron: A New Uptrend Has Started 2015-04-20T04:00:00Z Leaders should set the overall boundary conditions, or what I like to describe as the “sand-box” of acceptable areas to consider. Innovation: Process and Performance 2014-11-19T05:00:00Z MAVEN, said Jakosky, will tell them "the boundary conditions that surround the potential for life." NASA spacecraft approaches Mars to seek answers to lost water 2014-09-20T04:00:00Z Having done that, they adjust the new parameter back to zero to regain the differential equations for the master integrals, complete with the needed boundary conditions. Method for solving notorious calculus problems speeds particle physics computations 2022-11-30T05:00:00Z Maven, said Jakosky, will tell them “the boundary conditions that surround the potential for life.” Nasa's Maven craft prepares to enter Mars's orbit 2014-09-20T04:00:00Z So it brings the information of the environmental conditions, the boundary conditions, and feeds it to this local entity—so this local entity knows that it’s part of the whole. The Wholeness of Quantum Reality: An Interview with Physicist Basil Hiley 2013-11-05T00:15:15.043Z Consequently, in our view, a Verizon-Vodafone merger is the rational endgame, albeit with strict boundary conditions to keep it compelling for each side. FTSE under pressure on mining downgrade and Cyprus worries, while Sainsburys climbs 2013-03-19T09:51:57Z In case of statistics-heavy modeling, the results should ideally also include an estimation of model uncertainty, expressed through figures establishing the numerical accuracy of estimates, sensitivity of the model to boundary conditions, confidence intervals etc. Computational research in the era of open access: Standards and best practices 2013-01-02T18:45:00.413Z Here’s how Liu and Ma determine the boundary condition: With their new parameter set to infinity, that task involves evaluating integrals for “vacuum diagrams” that have no external legs and only loops. Method for solving notorious calculus problems speeds particle physics computations 2022-11-30T05:00:00Z Light behaves differently in such a waveguide, because the electromagnetic fields must obey certain "boundary conditions" on the sides of the device. Nanoscale Device Makes Light Travel Infinitely Fast 2012-11-06T22:38:49Z The theorists concentrate on what happens at the endpoints of the wire — setting the ‘boundary conditions’ for the before and after states of the quantum wave associated with the particle. Fairly Simple Math Could Bridge Quantum Mechanics and General Relativity 2012-11-05T19:49:46.627Z The solution of partial equations may involve arbitrary functions, which become definite when proper initial or boundary conditions are assigned. The New Gresham Encyclopedia Volume 4, Part 1: Deposition to Eberswalde 2011-04-14T02:00:57.977Z “It’s the boundary condition for a workable planet.” Carbon-Cutting 'Party' Set for Sunday 2010-10-08T20:05:00Z Thus, the boundary condition problem reduces to pure linear algebra. Method for solving notorious calculus problems speeds particle physics computations 2022-11-30T05:00:00Z A problem with the discrete equivalent of a boundary condition, often exhibited in programs by iterative loops. The Jargon File, Version 4.0.0, 24 Jul 1996 A problem with the discrete equivalent of a boundary condition. The Jargon File, Version 2.9.10, 01 Jul 1992 By proceeding in this way we follow Goethe's model: first, to keep the two border-phenomena separate, and, secondly, not to ascribe to the light itself what is in fact due to certain boundary conditions. Man or Matter |
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