We investigated the properties of quantum entanglement and mutual information in the multi-event horizon Schwarzschild-de Sitter(Sd S)spacetime for massless Dirac fields.For the first time,we obtained the expression f...We investigated the properties of quantum entanglement and mutual information in the multi-event horizon Schwarzschild-de Sitter(Sd S)spacetime for massless Dirac fields.For the first time,we obtained the expression for the evolutions of the quantum state near the black hole event horizon(BEH)and cosmological event horizon(CEH)in the Sd S spacetime.Under the Nariai limit,the physically accessible entanglement and mutual information are maximized,and the physically inaccessible correlations are zero.With the increase in temperature of either horizon,the physically accessible correlations experience degradation.Notably,the initial state remains entangled and can be utilized in entanglement-based quantum information processing tasks,which differs from the scalar field case.Furthermore,the degradation of physically accessible correlations is more pronounced for small-mass black holes.In contrast,the physically inaccessible correlations separated by the CEH monotonically increase with the radiation temperature,and such correlations are not decisively influenced by the effect of particle creation at the BEH.Moreover,a similar phenomenon is observed for the inaccessible correlations separated by the BEH.This result differs from the single event spacetime,in which the physically inaccessible entanglement is a monotonic function of the Hawking temperature.展开更多
Nursing records contain information on patients’treatment processes,which reflect the changes in patients’conditions and have legal effects.However,some of the written records of intensive care unit(ICU)nurses are i...Nursing records contain information on patients’treatment processes,which reflect the changes in patients’conditions and have legal effects.However,some of the written records of intensive care unit(ICU)nurses are incomplete according to our observations.This paper proposes an approach extracting structured nursing events from unstructured nursing records for detecting the missing items automatically.According to the PIO(problem,intervention,outcome)principle in the field of medical care,we propose event schemas for nursing records and annotate a Chinese nursing event extraction dataset(CNEED)on ICU nursing records.We find that several events may occur in a nursing record.Therefore,we present a multi-event extraction model for the nursing records.The experimental results demonstrate that our model achieves good results on CNEED and outperforms competitive methods on the multi-event argument attribution problem.By observing the results of automatic event extraction by our model,we detect missing items in the existing nursing records.This proves that our model can be used to help nurses check and improve the method of recording nursing processes.展开更多
基金supported by the National Natural Science Foundation of China(Grant Nos.12122504,12374408,and 12205133)the Natural Science Foundation of Hunan Province(Grant No.2023JJ30384)。
文摘We investigated the properties of quantum entanglement and mutual information in the multi-event horizon Schwarzschild-de Sitter(Sd S)spacetime for massless Dirac fields.For the first time,we obtained the expression for the evolutions of the quantum state near the black hole event horizon(BEH)and cosmological event horizon(CEH)in the Sd S spacetime.Under the Nariai limit,the physically accessible entanglement and mutual information are maximized,and the physically inaccessible correlations are zero.With the increase in temperature of either horizon,the physically accessible correlations experience degradation.Notably,the initial state remains entangled and can be utilized in entanglement-based quantum information processing tasks,which differs from the scalar field case.Furthermore,the degradation of physically accessible correlations is more pronounced for small-mass black holes.In contrast,the physically inaccessible correlations separated by the CEH monotonically increase with the radiation temperature,and such correlations are not decisively influenced by the effect of particle creation at the BEH.Moreover,a similar phenomenon is observed for the inaccessible correlations separated by the BEH.This result differs from the single event spacetime,in which the physically inaccessible entanglement is a monotonic function of the Hawking temperature.
基金supported by the National Key R&D Program of China (No.2020AAA0106600).
文摘Nursing records contain information on patients’treatment processes,which reflect the changes in patients’conditions and have legal effects.However,some of the written records of intensive care unit(ICU)nurses are incomplete according to our observations.This paper proposes an approach extracting structured nursing events from unstructured nursing records for detecting the missing items automatically.According to the PIO(problem,intervention,outcome)principle in the field of medical care,we propose event schemas for nursing records and annotate a Chinese nursing event extraction dataset(CNEED)on ICU nursing records.We find that several events may occur in a nursing record.Therefore,we present a multi-event extraction model for the nursing records.The experimental results demonstrate that our model achieves good results on CNEED and outperforms competitive methods on the multi-event argument attribution problem.By observing the results of automatic event extraction by our model,we detect missing items in the existing nursing records.This proves that our model can be used to help nurses check and improve the method of recording nursing processes.
