conrad.spacecenter.org的 10 大竞争对手

diamondchallenge.org

Discover the global network of exceptional organizations that empower high school entrepreneurs and contribute to the success of the Diamond Challenge.

kaggle.com

Discover what actually works in AI. Join millions of builders, researchers, and labs evaluating agents, models, and frontier technology through crowdsourced benchmarks, competitions, and hackathons.

societyforscience.org

This gallery was created to tell the story of the extraordinary relationship the Society has with the White House and their shared commitment to STEM research and scholarship in America.

arxiv.org

We perform a behavioral experiment of karma, a class of mechanisms for repeated resource allocation with attractive fairness and efficiency properties, in theory. Individuals in these mechanisms bid non-tradable credits that flow from resource consumers to yielders, like karma. Human subjects recruited on Amazon MTurk are repeatedly and randomly paired to bid karma according to time-varying and stochastic individual preferences or urgency to acquire resources. Treatments varied in the dynamic urgency process (frequent moderate urgency versus sporadic high urgency) and the richness of the bidding scheme (binary versus full range). Results are benchmarked against random allocation, and karma achieves a (almost) Pareto improvement over random, despite the MTurk subjects deviating significantly from the theoretically optimal Nash bidding policy. Maximum improvement is attained by subjects that deviate from Nash by up to one karma bid unit on average, and positive improvement is attained with average deviations of up to 3-4 bid units. These findings hold across all treatments, among which no significant differences are found, with the exception of the sporadic high urgency process with binary bidding treatment being (weakly) favorable over others. These results offer behaviorally robust lower bounds for the expected performance of karma in human populations. They also provide guidance for future testing and implementation of karma mechanisms in the real world.

grammarly.com

Adverbs of duration describe how long an action lasts. Common examples include briefly, temporarily, forever, permanently, and indefinitely. They are typically placed between the subject…

app.grammarly.com

Grammarly makes AI writing convenient. Work smarter with personalized AI guidance and text generation on any app or website.

cad.onshape.com

sign in to onshape, the #1 fastest growing cad system in the world with over 4 million users.