因此,显式计算模式对用户的要求更高,用户不仅需要理解自己的算法,还需要对并行计算和硬件有一定的理解。值得庆幸的是,现有R中的并行计算框架,如parallel (snow,multicores),Rmpi和foreach等采用的是映射式并行模型(Mapping),使用方法简单清晰,极大地简化了编程复杂度。R用户只需要将现有程序转化为*apply或者for的循环...
This paper is devoted to the problem of mapping parallel computations to distributed systems based on RapidIO communications. A distributed system is represented as a set of hosts with given levels of performance and a set of switches interconnected by links with known bandwidths. Parallel ...
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Blelloch, Guy E. 1990. "Prefix Sums and Their Applications." Technical Report CMU-CS-90-190, School of Computer Science, Carnegie Mellon University. Crow, Franklin. 1984. "Summed-Area Tables for Texture Mapping." InComputer Graphics (Proceedings of SIGGRAPH 1984)18(3), pp. 207–212. ...
A sequence whose elements are the result of invoking the one-to-many transform functioncollectionSelectoron each element ofsourcebased on the index supplied tocollectionSelector, and then mapping each of those sequence elements and their corresponding source element to a result element. ...
Running SSH commands or shell scripts on any number of hosts in parallel. All output from nodes will be returned back, keeping stdout and stderr streams mapping of original commands. Synchronizing files and directories across cluster with prior global cluster locking. After synchronization is done,...
Mapping data to parallel computers aims at minimizing the execution time of the associated application. However, it can take an unacceptable amount of time in comparison with the execution time of the application if the size of the problem is large. The authors propose reducing the problem size ...
Shadow mapping (Williams 1978) has been used extensively in 3D games and applications for producing shadowing effects. However, shadow mapping has inherent aliasing problems, so using standard shadow mapping is not enough to produce high-quality shadow rendering in complex and l...
Number of keyframes to be adjusted by the local bundle adjustment (LBA) in the local mapping. ~minimumTrackedPointsRatio: (int, default: 0.9) Ratio of tracked points that the current frame should have with respect to the closest keyframe to be selected as a keyframe used by the keyframe ...
the connections of the processing units. The mapping and parallel simulation are invisible for the user. The approach is feasible for developing neural net architectures as well as for simulating trained networks as part of an application in any context. 展开 ...