Tài liệu HIGH PERFORMANCE DRIVES Chapter1 ppt
Tài liệu High Performance Driver P1 ppt
... (2.56).
Additionally, transition from one vector to the other takes place at much higher frequency than the
HIGH PERFORMANCE DRIVES
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output frequency and each vector is utilised many ... the
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inverter is now capable of controlling both the frequency and the rms value of the fundamental
component of the output voltage. Add...
Tài liệu High Performance Driver P5a pptx
... HIGH PERFORMANCE DRIVES
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regarded as constant). Equations derived for the current-fed ... sensors are used in the air-gap of the machine, displaced by 90 degrees). Magnitude and
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position of the rotor flux space vector can then be obtained ... (2.24)-(2.26), together with flux linkage equations (2.21), suggests the follow...
Tài liệu High Performance Computing on Vector Systems-P2 pptx
... analyzing the performance using
them the user can locate the program area in which a performance problem lies.
Correcting these problems can improve the program performance. Figure 9 shows
performance ... the
achievable theoretical peak performance from the basic performance character-
istics of an architecture such as memory bandwidth and peak performance. If
performance is lim...
Tài liệu High Performance Computing on Vector Systems-P3 ppt
... a cluster of SMP’s which are interconnected by
a high speed network switch, and each node comprises eight vector PE’s. In order
to achieve high performance in such an architecture, the intra-node ... optical transition in higher energy region is
also available in such nanotubes according to our first-principles calculation of
dipole-matrix elements. We suspected that such high- energy e...
Tài liệu High Performance Computing on Vector Systems-P8 pptx
... Erlangen-N¨urnberg,
Cauerstraße 4, D-91058 Erlangen, Germany,
{kberonov,durst,noezyilm}@lstm.uni-erlangen.de,
2
High Performance Computing Center Stuttgart (HLRS),
Nobelstraße 19, D-70569 Stuttgart, Germany
Abstract ... is
presented in Fig. 4. It is clear that substantially higher Re than the maximal one
showninthatFigure,Re
τ
≈ 640, are required in order to quantify the high- Re
asympto...
Tài liệu High-Performance Parallel Database Processing and Grid Databases- P4 pptx
... gen-
erality, we consider queries that involve only one aggregate function and a single
join.
High- Performance Parallel Database Processing and Grid Databases,
by David Taniar, Clement Leung, ... table S in each processor is carried out after the distribution
phase.
Several things need to be highlighted from this scheme.
ž
First, the grouping is still performed before the join (although ....
Tài liệu High-Performance Parallel Database Processing and Grid Databases- P5 pptx
... since there is only one global index shared
by all processors, the height of the tree index is higher than local NRI index trees.
Another difference lies in the overlapping of nodes in each level. ... not partitioned like in NRI. Therefore, it can be expected that
the height of the index tree is higher, which is similar to that of the PRI structures.
Second, the sizes of data pointers and nod...
Tài liệu High-Performance Parallel Database Processing and Grid Databases- P7 ppt
... the chances of data being corrupted are high because of the lack of
a global management system. Various relaxed consistency requirements have been
High- Performance Parallel Database Processing ... Chapter 10 Transactions in Distributed and Grid Databases
proposed for data management in Grids. High- precision data-centric scientific appli-
cations cannot tolerate any inconsistency. This...
Tài liệu High-Performance Parallel Database Processing and Grid Databases- P8 pptx
... centralized and distributed recovery
models. Correctness of the recovery protocol is also given.
High- Performance Parallel Database Processing and Grid Databases,
by David Taniar, Clement Leung, ... coordinator broadcasts the decision. Many variations
and optimizations have been proposed to increase the performance of 2PC. But
homogeneity and synchronous communication among sites is the...
Tài liệu High-Performance Parallel Database Processing and Grid Databases- P10 pptx
... association rules, have been focusing
on this phase only. Improving the performance of this phase is critical to the overall
performance.
This section, focusing on parallel association rules, starts ... involved
in enumerating the corresponding support of all frequent itemsets from a
high- dimensional dataset is also high. This is one of the reasons that parallelism is
desirable.
To sho...