نتایج جستجو برای: reducer
تعداد نتایج: 997 فیلتر نتایج به سال:
This paper describes the results of research in field monitoring dynamic characteristics TwinSpin cycloid bearing reducer made by SPINEA. The this area resulted from requirement to monitor condition high-precision reducers and assess non-linear behavior kinematic structures monitored reducers, specifically determine optimal start-up time a particular class plan its maintenance. contact surfaces...
A cycloidal planetary reducer, which fulfils both high reduction ratio and low vibration in a thin small body, had been proposed to cope with the further downsizing of DC motors. The mechanism is inspired by intellectual toy ‘Spirograph’ structurally based on reducer. Instead internal gear output plate skid epitrochoid groove introduced. sun connected input shaft carrier works as stator. has pi...
MapReduce systems have become popular for processing large data sets and are increasingly being used in e-science applications. In contrast to simple application scenarios like word count, e-science applications involve complex computations which pose new challenges to MapReduce systems. In particular, (a) the runtime complexity of the reducer task is typically high, and (b) scientific data is ...
The main reducer is the component of whole vehicle, and its function to realize deceleration torque increase. For Baha racing car, in order improve dynamic performance designed from aspects layout, transmission ratio distribution, shift mode, overall size shell structure. Calculate range according parameters parts, verify rationality ratio; Then determine gear related parameters, finally design...
The vibration of robot joint reducer is the main factor that causes vibration or motion error of robot system. To improve the dynamic precision of robot system, the cycloid ball transmission used in robot joint is selected as study object in this paper. An efficient dynamic modelling method is presented-lumped stiffness method. Based on lumped stiffness method, a translational-torsional couplin...
MapReduce is a popular programming model for data parallel computation. In MapReduce, the reducer produces an output from a list of inputs. Due to the scheduling policy of the platform, the inputs may arrive at the reducers in different order. The commutativity problem of reducers asks if the output of a reducer is independent of the order of its inputs. Although the problem is undecidable in g...
Abstract A research challenge of vibration and control optimization pressurized reducer is solved in this article; a method based on genetic algorithm (GA) proposed to optimize the reducer. Considering bending strength helical gear root tooth surface contact fatigue as constraints, improved GA used solve it, optimal parameter combination obtained. The size center distance reduced by 9.59% compa...
Skyline queries are useful for finding interesting tuples from a large data set according to multiple criteria. The sizes of data sets are constantly increasing and the architecture of back-ends are switching from single-node environments to non-conventional paradigms like MapReduce. Despite the usefulness of skyline queries, existing works on skyline computation in MapReduce do not take full a...
Quantifiability is a concept in MapReduce Analytics based on the following two conditions: (a) a mapper should be cautious, that is, should not exclude any reducer's shuffle and sort strategy from consideration; and (b) a mapper should respect the reducers' shuffle and sort preferences, that is, should deem a reducer's shuffle and sort strategy ki infinitely more likely than k&ap...
Despite recent advances, software verification remains challenging. To solve hard verification tasks, we need to leverage not just one but several different verifiers employing different technologies. To this end, we need to exchange information between verifiers. Conditional model checking was proposed as a solution to exactly this problem: The idea is to let the first verifier output a condit...
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