Property:Has Description
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A
We applied the reasoner Pellet to create the ground MLN formulation and used TheBeast2 (Riedel 2008) to convert the MLN formulations to the corresponding ILP instances. Finally, we applied the mixed integer programming solver SCIP3 to solve the ILP. +
For the following sample queries, real-world data of sunspot observations recorded at
Kanzelh¨ohe Solar Observatory (KSO) have been used. The observatory is also a partner
in the Austrian Grid project.
The queries are shown in Fig. 2. Query 1 retrieves the first name, the last name,
and optionally the e-mail address of scientists who have done observations. Query 2
retrieves all observations ever recorded by Mr. Otruba. +
No data available now. +
We report on runtime performance, which corresponds to the user time produced by the _ _ command of the Unix operation system. Experiments in RDF-3X were run in both cold and warm caches; to run cold cache, we executed the same query five times by dropping the cache just before running the first iteration of the query. Each query executed by ANAPSID and SPARQL endpoints was run ten times, and we report on the average time. +
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{{{Description}}} +
B
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C
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D
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F
we evaluate FedX and analyze the performance of our optimiza-
tion techniques. With the goal of assessing the practicability of our system, we
run various benchmarks and compare the results to state-of-the-art federated
query processing engines. In our benchmark, we compare the performance of
FedX with the competitive systems DARQ and AliBaba7 since these are compa-
rable to FedX in terms of functionality and the implemented query processing
approach. Unfortunately, we were not able to obtain a prototype of the system
presented in [2] for comparison. +
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I
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K
L
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