n
-Dimension quasi-twisted (QT) codes are generalizations of 2-dimension QT codes and
n
-dimension quasi-cyclic codes. In this paper, we study some structural properties of
n
-dimension QT codes of ...arbitrary length over finite fields including the decomposition, the trace representation and the minimum Hamming distance bound.
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CEKLJ, EMUNI, FIS, FZAB, GEOZS, GIS, IJS, IMTLJ, KILJ, KISLJ, MFDPS, NLZOH, NUK, OILJ, PNG, SAZU, SBCE, SBJE, SBMB, SBNM, UKNU, UL, UM, UPUK, VKSCE, ZAGLJ
Prediction scoring systems for coronary artery bypass grafting (CABG) patients on venoarterial extracorporeal membrane oxygenation (VA-ECMO) have not yet been reported. This study was designed to ...develop a predictive score for in-hospital mortality for cardiogenic shock patients who received VA-ECMO after isolated CABG.
Retrospective cohort study of consecutive CABG patients supported with VA-ECMO (n = 166) at the Beijing Anzhen Hospital between February 2004 and March 2017.
One hundred and six patients (64%) could be weaned from VA-ECMO, and 74 patients (45%) survived to hospital discharge. On the basis of multivariable logistic regression analyses, the pRedicting mortality in patients undergoing veno-arterial Extracorporeal MEMBrane oxygenation after coronary artEry bypass gRafting (REMEMBER) score was created with six pre-ECMO parameters: older age, left main coronary artery disease, inotropic score > 75, CK-MB > 130 IU/L, serum creatinine > 150 umol/L, and platelet count < 100 × 10
/L. Four risk classes, namely class I (REMEMBER score 0-13), class II (14-19), class III (20-25), and class IV (> 25) with their corresponding mortality (13%, 55%, 70%, and 94%, respectively), were identified. The area under the receiver operating characteristic curve 0.85(95% CI 0.79-0.91) for the REMEMBER score was better than those for the SOFA, SAVE, EuroSCORE, and ENCOURAGE scores in this population.
The REMEMBER score might help clinicians at bedside to predict in-hospital mortality for patients receiving VA-ECMO after isolated CABG for refractory cardiogenic shock. Prospective studies are needed to externally validate this scoring system.
We construct a class of
Z
p
Z
p
v
-additive cyclic codes, where
p
is a prime number and
v
2
=
v
. We determine the asymptotic properties of the relative minimum distance and rate of this class of ...codes. We prove that, for any positive real number
0
<
δ
<
1
such that the
p
-ary entropy at
k
+
l
2
δ
is less than
1
2
, the relative minimum distance of the random code is convergent to
δ
and the rate of the random code is convergent to
1
k
+
l
, where
p
,
k
,
l
are pairwise coprime positive integers.
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Available for:
CEKLJ, EMUNI, FIS, FZAB, GEOZS, GIS, IJS, IMTLJ, KILJ, KISLJ, MFDPS, NLZOH, NUK, OILJ, PNG, SAZU, SBCE, SBJE, SBMB, SBNM, UKNU, UL, UM, UPUK, VKSCE, ZAGLJ
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