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K-means is a clustering algorithm which is used widely. Its clustering results heavily depend on the initial centroids. An adaptive method for disperse centroids is proposed to improve the stability and accuracy of the clustering result. The Adaptively Disperse Centroids K-means Algorithm (ADC-K-means) is implemented using MapReduce model on hadoop platform, and it is compared with the k-means of...
This letter considers the IaaS data center where tenant tasks are different in terms of the number of requested physical cores, leading to heterogeneous virtual machines (VMs). We develop a novel analytical model to evaluate the performance of heterogeneous VMs on the same physical machine by applying the Continuous Time Markov Chain.
In order to reduce the complexity of traditional multithreaded parallel programming, this paper explores a new task-based parallel programming using the Microsoft .NET Task Parallel Library (TPL). Firstly, this paper proposes a custom data partitioning optimization method to achieve an efficient data parallelism, and applies it to the matrix multiplication. The result of the application supports the...
In the era of petascale computing, more scientific applications are being deployed on leadership scale computing platforms to enhance the scientific productivity. Many I/O techniques have been designed to address the growing I/O bottleneck on large-scale systems by handling massive scientific data in a holistic manner. While such techniques have been leveraged in a wide range of applications, they...
The digital definition of mechanical products is the precondition and foundation for the digital design and digital manufacturing, and also the efficient means for enterprises to reduce cost and promote core competition ability. Currently the research on the related technology of the digital definition of mechanical products is becoming a new focus in the field. In this paper, the rule-based data...
The global machinery industry is increasingly dependent on CAD data to design and produce products. Because of that dependency, problems with the quality of CAD data lead to problems developing and producing the products. Therefore,it is very necessary to carry out researching on CAD data checking. In this paper, the rule-based product CAD data checking methods and implementation techniques are proposed...
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