2018 NFL Draft grades
In this paper, we extend TD networks by allowing the network-update process answer network to depend on the recent history of previous actions and observations rather than only on the most recent action and observation. I wonder who the options might be? Current active district judges of the Ninth Circuit Court of Appeals. For me Corbett is a very different player to Braden Smith. Be sure to look early and book in advance to have a chance at getting the best rate possible. I like your mock draft Rob the reason is if Cleveland drafts a QB first pick you might want to get a decent tackle Joe Thomas retired it would make sense plus new England lost their left tackle Nate S. In this work we explore the use of reinforcement learning RL to help with human decision making, combining state-of-the-art RL algorithms with an application to prosthetics.
Reinforcement Learning for 3 vs. Open theoretical questions in reinforcement learning. Humorous excerpts from the JAIR reviews recommending rejection of this paper. Learning instance-independent value functions to enhance local search. Past, present, and future. Published as Lecture Notes in Computer Science , pp.
Intra-option learning about temporally abstract actions. Proceedings of the 15th International Conference on Machine Learning, pp. Macro-actions in reinforcement learning: Theoretical results on reinforcement learning with temporally abstract options. Generalization in reinforcement learning: Successful examples using sparse coarse coding. Reinforcement learning with replacing eligibility traces. Model-based reinforcement learning with an approximate, learned model.
Some additional results are in this earlier version of the same paper. Adaptive intelligent scheduling for ATM networks. Modeling the world at a mixture of time scales. On bias and step size in temporal-difference learning. Online learning with random representations.
Adapting bias by gradient descent: An incremental version of delta-bar-delta. Gain adaptation beats least squares? Machines that Learn and Mimic the Brain. Reprinted in Stethoscope Quarterly, Spring. The challenge of reinforcement learning.
Iterative construction of sparse polynomial approximations. Advances in Neural Information Processing Systems 4, pp. Adaptation of cue-specific learning rates in network models of human category learning , Proceedings of the Fouteenth Annual Conference of the Cognitive Science Society, pp. Planning by incremental dynamic programming.
Dyna, an integrated architecture for learning, planning and reacting. Integrated modeling and control based on reinforcement learning and dynamic programming. Reinforcement learning architectures for animats , Proceedings of the First International Conference on Simulation of Adaptive Behavior: From Animals to Animats, pp. The second part of the paper presents Dyna, a class of architectures based on reinforcement learning but which go beyond trial-and-error learning.
Dyna architectures include a learned internal model of the world. By intermixing conventional trial and error with hypothetical trial and error using the world model, Dyna systems can plan and learn optimal behavior very rapidly.
Results are shown for simple Dyna systems that learn from trial and error while they simultaneously learn a world model and use it to plan optimal action sequences. We also show that Dyna architectures are easy to adapt for use in changing environments.
Reinforcement learning is direct adaptive optimal control , Proceedings of the American Control Conference, pages First results with Dyna, an integrated architecture for learning, planning, and reacting.
Time-derivative models of pavlovian reinforcement. In Learning and Computational Neuroscience: Foundations of Adaptive Networks, M. Sequential decision problems and neural networks. Artificial intelligence as a control problem: Comments on the relationship between machine learning and intelligent control.
Appeared in Machine Learning in a dynamic world. Implementation details of the TD lambda procedure for the case of vector predictions and backpropagation. Learning to predict by the methods of temporal differences. Scan of paper as published, with erratum added.
Digitally remastered with missing figure in place. Convergence theory for a new kind of prediction learning , Proceedings of the Workshop on Computational Learning Theory, pp. A normalized adaptive linear element that learns efficiently. Selected bibliography on connectionism , In: Evolution, Learning, and Cognition, Y. A temporal-difference model of classical conditioning , Proceedings of the Ninth Annual Conference of the Cognitive Science Society, pp. Two problems with backpropagation and other steepest-descent learning procedures for networks , Proceedings of the Eighth Annual Conference of the Cognitive Science Society, pp.
Reprinted in Artificial Neural Networks: Concepts and Theory, edited by P. Learning distributed, searchable, internal models , Proceedings of the Distributed Artificial Intelligence Workshop, pp.
The learning of world models by connectionist networks , Proceedings of the Seventh Annual Conference of the Cognitive Science Society, pp. The results here were obtained using a computer simulation of the pole-balancing problem. A movie will be shown of the performance of the system under the various requirements and tasks. Connectionist learning in real time: Sutton-Barto adaptive element and classical conditioning of the nictitating membrane response , Proceedings of the Seventh Annual Conference of the Cognitive Science Society, pp.
Temporal credit assignment in reinforcement learning Mbytes. The algorithms considered include some from learning automata theory, mathematical learning theory, early "cybernetic" approaches to learning, Samuel's checker-playing program, Michie and Chambers's "Boxes" system, and a number of new algorithms. The tasks were selected to involve, first in isolation and then in combination, the issues of misleading generalizations, delayed reinforcement, unbalanced reinforcement, and secondary reinforcement.
The tasks range from simple, abstract "two-armed bandit" tasks to a physically realistic pole-balancing task. The results indicate several areas where the algorithms presented here perform substantially better than those previously studied. An unbalanced distribution of reinforcement, misleading generalizations, and delayed reinforcement can greatly retard learning and in some cases even make it counterproductive.
Performance can be substantially improved in the presence of these common problems through the use of mechanisms of reinforcement comparison and secondary reinforcement. We present a new algorithm similar to the "learning-by-generalization" algorithm used for altering the static evaluation function in Samuel's checker-playing program. Simulation experiments indicate that the new algorithm performs better than a version of Samuel's algorithm suitably modified for reinforcement learning tasks.
Theoretical analysis in terms of an "ideal reinforcement signal" sheds light on the relationship between these two algorithms and other temporal credit-assignment algorithms. A theory of salience change dependent on the relationship between discrepancies on successive trials on which the stimulus is present.
Synthesis of nonlinear control surfaces by a layered associative network , Biological Cybernetics Adaptation of learning rate parameters. Goal Seeking Components for Adaptive Intelligence: An Initial Assessment , by A.
Toward a modern theory of adaptive networks: Expectation and prediction , Psychological Review Translated into Spanish by G. Ruiz to appear in the journal Estudios de Psicologia. An adaptive network that constructs and uses an internal model of its world , Cognition and Brain Theory 4: Goal seeking components for adaptive intelligence: Appendix C is available separately.
A reinforcement learning associative memory , Biological Cybernetics An illustration of associative search , Biological Cybernetics A neuronal theory of learning , Brain Theory Newsletter 3, No. A unified theory of expectation in classical and instrumental conditioning.
Bachelors thesis, Stanford University. Learning theory support for a single channel theory of the brain.
Multi-step methods are important in reinforcement learning RL. Eligibility traces, the usual way of handling them, works well with linear function approximators. However, this was limited to action-value methods. In this paper, we extend this approach to handle n-step returns, generalize this approach to policy gradient methods and empirically study the effect of such delayed updates in control tasks.
Specifically, we introduce two novel forward actor-critic methods and empirically investigate our proposed methods with the conventional actor-critic method on mountain car and pole-balancing tasks. From our experiments, we observe that forward actor-critic dramatically outperforms the conventional actor-critic in these standard control tasks. Notably, this forward actor-critic method has produced a new class of multi-step RL algorithms without eligibility traces. Representations are fundamental to artificial intelligence.
The performance of a learning system depends on the type of representation used for representing the data. Typically, these representations are hand-engineered using domain knowledge. More recently, the trend is to learn these representations through stochastic gradient descent in multi-layer neural networks, which is called backprop.
Learning the representations directly from the incoming data stream reduces the human labour involved in designing a learning system. More importantly, this allows in scaling of a learning system for difficult tasks. In this paper, we introduce a new incremental learning algorithm called crossprop, which learns incoming weights of hidden units based on the meta-gradient descent approach, that was previously introduced by Sutton and Schraudolph for learning step-sizes.
The final update equation introduces an additional memory parameter for each of these weights and generalizes the backprop update equation. From our experiments, we show that crossprop learns and reuses its feature representation while tackling new and unseen tasks whereas backprop re- learns a new feature representation. We develop an extension of the Rescorla-Wagner model of associative learning. In addition to learning from the current trial, the new model supposes that animals store and replay previous trials, learning from the replayed trials using the same learning rule.
This simple idea provides a unified explanation for diverse phenomena that have proved challenging to earlier associative models, including spontaneous recovery, latent inhibition, retrospective revaluation, and trial spacing effects.
For example, spontaneous recovery is explained by supposing that the animal replays its previous trials during the interval between extinction and test. These include earlier acquisition trials as well as recent extinction trials, and thus there is a gradual re-acquisition of the conditioned response.
We present simulation results for the simplest version of this replay idea, where the trial memory is assumed empty at the beginning of an experiment, all experienced trials are stored and none removed, and sampling from the memory is performed at random. Even this minimal replay model is able to explain the challenging phenomena, illustrating the explanatory power of an associative model enhanced by learning from remembered as well as real experiences.
An important application of interactive machine learning is extending or amplifying the cognitive and physical capabilities of a human. To accomplish this, machines need to learn about their human users' intentions and adapt to their preferences. In most current research, a user has conveyed preferences to a machine using explicit corrective or instructive feedback; explicit feedback imposes a cognitive load on the user and is expensive in terms of human effort.
The primary objective of the current work is to demonstrate that a learning agent can reduce the amount of explicit feedback required for adapting to the user's preferences pertaining to a task by learning to perceive a value of its behavior from the human user, particularly from the user's facial expressionswe call this face valuing. We empirically evaluate face valuing on a grip selection task. Our preliminary results suggest that an agent can quickly adapt to a user's changing preferences with minimal explicit feedback by learning a value function that maps facial features extracted from a camera image to expected future reward.
We believe that an agent learning to perceive a value from the body language of its human user is complementary to existing interactive machine learning approaches and will help in creating successful human-machine interactive applications. In this paper we introduce the idea of improving the performance of parametric temporal-difference TD learning algorithms by selectively emphasizing or de-emphasizing their updates on different time steps.
Our treatment includes general state-dependent discounting and bootstrapping functions, and a way of specifying varying degrees of interest in accurately valuing different states. Myoelectric prostheses currently used by amputees can be difficult to control. Machine learning, and in particular learned predictions about user intent, could help to reduce the time and cognitive load required by amputees while operating their prosthetic device. The goal of this study was to compare two switching-based methods of controlling a myoelectric arm: We compared non-adaptive and adaptive control in two different experiments.
In the first, one amputee and one non-amputee subject controlled a robotic arm to perform a simple task; in the second, three able-bodied subjects controlled a robotic arm to perform a more complex task. For both tasks, we calculated the mean time and total number of switches between robotic arm functions over three trials. Adaptive control significantly decreased the number of switches and total switching time for both tasks compared with the conventional control method.
Real-time prediction learning was successfully used to improve the control interface of a myoelectric robotic arm during uninterrupted use by an amputee subject and able-bodied subjects. Adaptive control using real-time prediction learning has the potential to help decrease both the time and the cognitive load required by amputees in real-world functional situations when using myoelectric prostheses.
We consider how to learn multi-step predictions effciently. Conventional algorithms wait until observing actual outcomes before performing the computations to update their predictions. If predictions are made at a high rate or span over a large amount of time, substantial computation can be required to store all relevant observations and to update all predictions when the outcome is finally observed.
We show that the exact same predictions can be learned in a much more computationally congenial way, with uniform per-step computation that does not depend on the span of the predictions. We apply this idea to various settings of increasing generality, repeatedly adding desired properties and each time deriving an equivalent span-independent algorithm for the conventional algorithm that satisfies these desiderata.
Interestingly, along the way several known algorithmic constructs emerge spontaneously from our derivations, including dutch eligibility traces, temporal difference errors, and averaging. Each step, we make sure that the derived algorithm subsumes the previous algorithms, thereby retaining their properties. Ultimately we arrive at a single general temporal-difference algorithm that is applicable to the full setting of reinforcement learning. In this article we develop the perspective that assistive devices, and specifically artificial arms and hands, may be beneficially viewed as goal-seeking agents.
We further suggest that taking this perspective enables more powerful interactions between human users and next generation prosthetic devices, especially when the sensorimotor space of the prosthetic technology greatly exceeds the conventional myoelectric control and communication channels available to a prosthetic user. Using this schema, we present a brief analysis of three examples from the literature where agency or goal-seeking behaviour by a prosthesis has enabled a progression of fruitful, task-directed interactions between a prosthetic assistant and a human director.
While preliminary, the agent-based viewpoint developed in this article extends current thinking on how best to support the natural, functional use of increasingly complex prosthetic enhancements. Their appeal comes from their good performance, low computational cost, and their simple interpretation, given by their forward view. Algorithmically, these true online methods only make two small changes to the update rules of the regular methods, and the extra computational cost is negligible in most cases.
However, they follow the ideas underlying the forward view much more closely. In particular, they maintain an exact equivalence with the forward view at all times, whereas the traditional versions only approximate it for small step-sizes. And, there are SO many ways to enjoy the amazingly nutritious fruit too. Here are my 5 favorite ways to enjoy watermelon in the summertime, beyond the traditional slice of fruit. Mornings are a busy time of day, rushing to and from, and trying to get there on time!
Add in breakfast and it seems overwhelming to get it all done. You already know breakfast is the most important meal of the day, yet so many Americans miss out on this meal. Missing breakfast can have a domino effect of making unhealthy choices or overeating later on in the day.
Diabetes is a global health crisis — reaching far and wide, and impacting nearly every country around the world. In fact, in more than million people had diabetes. In the meantime, all of the area covered with clover will be getting a dose of nitrogen and will be relatively protected from weeds. Also, I mentioned in my post on raised beds that much of my current garden bed soil will eventually be moved around.
When that happens, the clover will get mixed in as a normal cover crop would, and will improve the soil then as well. The view under the canopy…!!! The clover is starting to fade by now cause the lack of sun light, blocked by the canopy. The clover with the leaves and branches that were cleaned from the ladies will make a layer of 'green manure' that will keep the soil with enough activity both fungae and bacterial to supply all our plants needs.
Diverse communities are also more efficient at capturing nutrients, light, and other limiting resources. I used a broadcast method aka scattering the seeds to add them to my raised bed walls.
If you use a broadcast method, be certain to do it A in your rainy season when the heat is gone or B cover it with a light layer of soil. In my picture, you can see the seeds that fell into soil cracks were the only ones that performed well.
People have been using clover as a cover crop for a long time. I purchased 1 lb of it with my seed order at Territorial Seed Co. Trifolium repens — Growing to only 8 inches, this low perennial clover has a growth habit similar to White Dutch Clover but will stand drought conditions better, is more vigorous, and tolerates a wide range of soils.
Used for both a spring and fall cover crop, New Zealand White Clover can be sown between row plantings or as a solid seeded cover. A terrific green manure as it fixes up to pounds of nitrogen per acre and attracts beneficial insects. Kane is the founder of Insteading. He lives on his own urban homestead with his family in West Seattle. Any way you can post pictures of the finished product? The beds with the clover growing around them?
Keep an eye on our facebook page at https: I have been doing something almost like this in my garden for years. I have the clover planted in the paths between my planting beds. Works great, and looks wonderful. If you have some pictures please feel free to post them on our wall at https: Thanks for the tip! Be careful with red clover though, depending on the type that can be a few feet high and could shade out other plants.
Part of the reason I chose white clover specifically is that it only gets 6 to 10 inches high. We have horrible clay soil on a tiny city lot and my only planting space is the front lawn. I set up a raised bed and have dug in a few small beds on the edges of the lawn but am struggling with the poor soil. Do you think I could plant my yard in clover?
I am a fan of a higher than normal concentration in lawns as well, it is a fantastic plant for improving soil quality.