Tài liệu PROPAGATION TIME / RESOLUTION pdf
Tài liệu Managing time in relational databases- P7 pdf
... effective time and assertion time. As well as additional
diagrams which focus more on effective time than assertion
time, we also present an in-line notation for single asserted
Managing Time in ... that object. There will be no periods
of time at which two or more rows will both claim to describe
the object as it was/is/will be during a period of time in its life
history. There w...
Tài liệu Managing time in relational databases- P9 pdf
... point in time,
the episode consi sts of a single version with an effective
time period beginning in January 2010 and extending to
1 2/3 1/9 999. Because the effective end date is 1 2/3 1/9 99 9,
this ... assert a closed episode, and remove all traces of
P861, in current assertion time, from the time period of [Dec
2010 – 1 2/3 1/9 999].
This is what the result of a delete a...
Tài liệu Managing time in relational databases- P12 pdf
... effective
time it affects. As a relationship between a point in time and a
period of time, the basic options are that the point in time can
be earlier than the period of time, within the period of time, ... transaction has
an oid, an effective time period, and an assertion time period.
The default effective time period for a temporal transac tion is
[Now() – 1 2/3 1/9 999],...
Tài liệu Managing time in relational databases- P13 pdf
... compare any
two time periods in effective time, we are assumi ng that they
exist in shared assertion time. When one of those time periods
is on a tran saction, that assertion time cannot begin ... was
1 2/3 1/9 999. This is guaranteed because (i) all versions are cre-
ated with an assertion end date of 1 2/3 1/9 999, and (ii) the AVF
will never alter an assertion end date that...
Tài liệu Managing time in relational databases- P16 pdf
... eff_end_dt, client, type, copay
FROM Policy_V_Curr_Hist
WHERE eff-beg >¼ 0 1/0 1/2 009 AND eff_end_dt < 0 1/0 1/2 010
Current Data: Current Claims About the Present
The Current Data dataset consists ... or overlapping periods of effective
time, assertion time is not needed in this view. All the rows in
this dataset are currently asserted rows. And so only one time
period is...
Tài liệu Managing time in relational databases- P19 pdf
... most
rows are created with a known (non-1 2/3 1/9 999) effective end
date, nothing else is needed in the index. But for tables in which
most rows are created with a 1 2/3 1/9 999, “until further notice”,
effective ... assertion time
status, and will do so “quietly”, simply because of the passage of
time. Row 7 will fall into the assertion time past and, at the same
moment, row 8...
Tài liệu Managing time in relational databases- P23 pdf
... table whose assertion time and/or effective
time is co-extensive with its physical presence in its table.
Semantics: a row of data whose assertion time and/or effective time is not
expressed ... exist in non-current
assertion time and/or non-current effective time.
Components: asserted version table, assertion time, current assertion, current
version, effective time, external pi...
Tài liệu Real-time, on-line monitoring of organic chemical reactions using extractive electrospray ionization tandem mass spectrometry pdf
... mm away from the sprayer orifice. A solvent
mixture (methanol/water/acetic acid 40 %/4 0 %/2 0%) was
electro-sprayed at a flow rate of 5 mL/min infused by a syringe
pump (Harvard Apparatus, Holiston, ... including
protonated acetic anhydride (m/z 103), protonated benzyl
acetate (m/z 151), a side product (m/z 301) and intermediate B
(m/z 273) as a function of time are shown in Fig. 5. The...