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Scheduling has a great influence in improving computer system performance. Many recent system designs use policies which give priority to short jobs as it is often the case that the majority of the jobs are short. SRPT (Shortest Remaining Processing Time First), which servers the jobs that needs the least amount of service to complete, is known to produce optimum mean response time. However SRPT requires...
Sea-sky-line extraction under complicated sea-sky background is an important aspect of long-range target tracking research. An algorithm based on improved local complexity is proposed according to the feature that the sky and the sea usually show up at different gray levels in sea-sky background images. Median filter is applied first to remove peak noise, and then the point set of sea-sky-line region...
Temporal XML has attracted more and more attention in recent researches. Temporal XML can represent temporal data, track historical information and recover the state of the document as of any given time. This paper is devoted to the technique and the implementation of temporal XML indexing. Firstly, we introduce temporal XML, suffix tree and semi-structured data model (OEM), and a temporal XML indexing...
In this paper we consider the problem of scheduling jobs with and without release dates on parallel unbounded batch processing machines to minimize total completion time. We show that the problem with release dates is strongly NP-hard by a reduction from the strongly NP-hard 3-Partition problem and develop a dynamic programming algorithm for the problem without release dates.
In this paper we provide a linear programming relaxation algorithm for scheduling problem with controllable processing times. This problem is NP-hard even if there are no precedence constraints between the jobs. We prove that the performance ratio of the algorithm is 4.
In this paper we prove that the problem of scheduling jobs with incompatible job families on a single batch processing machine to minimize number of tardy jobs is strongly (unary) NP-hard. We then develop a dynamic programming algorithm for minimizing weighted number of tardy jobs on a single batch processing machine with incompatible job families.
A multiple-input-multiple-output (MIMO) system in which space-time block coded (STBC) signals are equalized by a decision feedback equalizer (DFE) is presented in this paper. Three factorization algorithms including band LU, band LDL and band Cholesky factorization are used to obtain the optimum feedback and feedforward filter matrices of the STBC-DFE systems. The complexities of these three methods...
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