The latter being too sparse and uninformative to criticize the actor directly. The second component of the model, the learned In particular, it does not capture the flexible way in which rats can learn about novel goal locations. The paper begins by presenting the reward-based component of the model, demonstrating that this component alone captures some aspects of spatial learning, but not all. Model, TD learning is used, in association with a stable place cell representation, to develop consistent coordinates directly. b: An example of a Gaussian place field (x and y axes represent location, z axis represents firing rate). Uses to select between eight possible directions of movement from any given location. Place cells also project to eight action cells, which the actor a: An input layer of place cells projects to the critic cell, C, whose output is used to evaluate behavior. Hippocampus 10 1–16, 2000 4 RMW FOSTER Az k´ıs´eET rletAL.le´ır´as´ara egy actor-critic, cselekv˝o-kritiz´al´o” modellt javasoltak: ”įIGURE 2. (b) is from Steele and Morris (1999) data for (a) were obtained in the same apparatus and using the same methods as those described for the DMP task by Steele and Morris (1999), with permission, except that: 1) the platform remained in the same location across days, until moved to the opposite quadrant on day 8 and 2) the intertrial interval was always 15 s.įoster ´ es mtsai. Observed that platforms nearer the center of the pool, or near to a starting position, were easier to find under random search than others.
#NAVIGARE NECESSE EST VIVERE NON EST NECESSE MEANING TRIAL#
Trial 1 performance differs from day to day, due to platform position. Note 1) asymptotic performance in RMW task, 2) one-trial learning in DMP task, and 3) difference in escape latency on second trial of day 8, between the two tasks. For both, escape latency (time taken to reach platform) is plotted across days (RMW task: 4 trials/day, fixed platform location, days 1–7 reversal to new platform location, days 8–9 DMP task: 4 trials/day, new platform location each day). Performance of rats on (a) reference memory (RMW), N 5 12, and (b) delayed matching-to-place (DMP), N 5 62. reference HIPPOCAMPALLY DEPENDENT NAVIGATION 3 memory (RMW) ´es a delayed-mathing-to-place (DMP) k´ıs´erleteket.įIGURE 1. Hippocampus 10 1–16, 2000įoster, Morris ´es Dayan k´et elt´er˝o k´ıs´erlet egyideju˝ modellez´es´et tu˝zt´ek ki c´elul, az u´n. ir´ any´ıt´ as – helysejtekįoster ´ es mtsai.
Trullier ´es mtsai.: Biologically based artificial navigation systems: rewiev and prospects. Progress in Neurobiology 51 483–544, 1997 alapj´an ´ keres´es metrikus kit´er˝ok, metriUt kus r¨ovid´ıt´esek, vadonat´uj u´tvonalak bej´ar´asa P´alya tervez´ese, mely k¨ovet´es´et alacsonyabb szint˝u strat´egi´ak val´os´ıtj´ak meg ez a p´alya nem sz¨uks´egszer˝uen egy kor´abbr´ol ismert p´alya
Metrikus kapcsolattal rendelkez˝o ir´anypont-konfigur´aci´ok ´ keres´es stimulus-v´alasz-stimulus Ut t´ıpus´u viselked´es topol´ogiai kit´er˝ok” ” (´ut v´alaszt´as lehet˝os´ege) Topol´ogiai kapcsolattal rendelkez˝o ir´anypont-konfigur´aci´okĪz adott helyr˝ol indul´o ´es a c´elba vezet˝o, kor´abban megismert helyszekvenci´ak keres´ese ´ keres´es stimulus-v´alasz t´ıpus´u viUt selked´es ¨ lokaliz´al´as az aktu´alis On helyet, mint kor´abban l´atott helyet felismerve eligazod´as elmozdul´as a c´el fel´e minden helyhez lok´alis ir´any-referencia rendszer a k´ıv´ant elmozdul´as ir´anya Lok´alis navig´aci´o csak akkor haszn´alhat´o, ha a c´el l´atszik Ir´anypont-konfigur´aci´o a szenzoros bemenetek nyers ´allapota a c´eln´alĪ l´atott ´es a memoriz´alt konfigur´aci´o elt´er´es´enek minimaliz´al´asa Navig´ aci´ os strat´ egi´ ak hierarchi´ aja Navig´aci´oĮl˝ore begyakorolt mozdulatsor automatikus kivitelez´ese Lawton: Qualitative navigation for mobile robots. Hol vannak m´as helyek hozz´am k´epest?.Az ismert vil´ag pedig olyan felu¨letekb˝ol ´all, melyek egym´ashoz viszony´ıtott hely´et egy t´erk´epen reprezent´aljuk.”Īvagy defini´alhatjuk pl. Ehhez szu¨ks´eges az az alapvet˝o folyamat, amellyel meghat´arozzuk helyu¨nket az ismert vil´aghoz k´epest.
MIT Press/Bradford Books, MA, 1990Ī navig´aci´o azt a folyamatot jelenti, mely sor´an meghat´arozunk ´es v´egrehaj” tunk egy cselekv´essorozatot, vagy egy p´aly´an eljutunk az egyik helyr˝ol a m´asikra. The known world is composed of the surfaces whose locations relative to one another are represented on a map.” C. Processes for estimating one’s position with respect to the known world are fundamental to it. Mit is jelent a navig´ aci´ o? Navigation is the process of determining and maintaining a course ” or trajectory from one place to another. Mott´o: Navigare necesse est, vivere non est necesse! – Egy ´okori haj´oskapit´any
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