誓约
发表于 2025-3-21 17:14:57
书目名称Strategies for the Search for Life in the Universe影响因子(影响力)<br> http://figure.impactfactor.cn/if/?ISSN=BK0879005<br><br> <br><br>书目名称Strategies for the Search for Life in the Universe影响因子(影响力)学科排名<br> http://figure.impactfactor.cn/ifr/?ISSN=BK0879005<br><br> <br><br>书目名称Strategies for the Search for Life in the Universe网络公开度<br> http://figure.impactfactor.cn/at/?ISSN=BK0879005<br><br> <br><br>书目名称Strategies for the Search for Life in the Universe网络公开度学科排名<br> http://figure.impactfactor.cn/atr/?ISSN=BK0879005<br><br> <br><br>书目名称Strategies for the Search for Life in the Universe被引频次<br> http://figure.impactfactor.cn/tc/?ISSN=BK0879005<br><br> <br><br>书目名称Strategies for the Search for Life in the Universe被引频次学科排名<br> http://figure.impactfactor.cn/tcr/?ISSN=BK0879005<br><br> <br><br>书目名称Strategies for the Search for Life in the Universe年度引用<br> http://figure.impactfactor.cn/ii/?ISSN=BK0879005<br><br> <br><br>书目名称Strategies for the Search for Life in the Universe年度引用学科排名<br> http://figure.impactfactor.cn/iir/?ISSN=BK0879005<br><br> <br><br>书目名称Strategies for the Search for Life in the Universe读者反馈<br> http://figure.impactfactor.cn/5y/?ISSN=BK0879005<br><br> <br><br>书目名称Strategies for the Search for Life in the Universe读者反馈学科排名<br> http://figure.impactfactor.cn/5yr/?ISSN=BK0879005<br><br> <br><br>
外表读作
发表于 2025-3-21 20:55:30
Uncertainty in Estimates of the Number of Extraterrestrial Civilizations. It is further argued that it is advantageous to consider explicitly these underlying assumptions in order to compare the probable numbers of civilizations operating radio beacons, permitting radio leakage, dispatching probes for radio surveillance or dispatching vehicles for manned surveillance.
察觉
发表于 2025-3-22 03:00:34
N is Neither Very Small nor Very Largeficient to support hundreds of millions of individuals for hundreds of years. The laws of physics, biology, and interstellar distances thus make interstellar colonization unreasonable, and moderate values of N continue to be most plausible.
树胶
发表于 2025-3-22 08:10:40
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补助
发表于 2025-3-22 10:30:34
A Bimodal Search Strategy for SETItraterrestrial origin will not be any easy matter. Whether N is large or small, we do not know where to point our antennas, on what frequency to listen, nor the type of signal to search for. To determine these, we must engage in an extensive and systematic search program.
forebear
发表于 2025-3-22 15:54:30
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annexation
发表于 2025-3-22 19:20:41
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Credence
发表于 2025-3-22 21:17:41
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Autobiography
发表于 2025-3-23 03:40:30
Strategies for SETI Through Radio Waves an Introductioning visited. But a more skeptical faction, finding no solid evidence either for visitation or for astro-engineering on a Dyson scale, concludes that either we are being quarantined (the zoo hypothesis) or else intelligent life is a very rare phenomenon (we really . alone).
projectile
发表于 2025-3-23 06:47:22
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