Zircon U–Pb and Hf isotope data integrated in this study for magmatic and metamorphic rocks fromthe Hida Belt,southwest Japan,lead to a new understanding of the evolution of the Cordilleran arc system along the ances...Zircon U–Pb and Hf isotope data integrated in this study for magmatic and metamorphic rocks fromthe Hida Belt,southwest Japan,lead to a new understanding of the evolution of the Cordilleran arc system along the ancestral margins of present-day Northeast Asia.Ion microprobe data for magmatic zircon domains from eight mafic tointermediate orthogneisses in the Tateyama and Tsunogawa areas yielded weighted mean 206Pb/238U ages spanning the entire Permian period(302–254 Ma).Under cathodoluminescence,primary magmatic growth zones in the zircon crystals were observed to be partially or completely replaced by inward-penetrating,irregularly curved featureless or weakly zoned secondary domains that mostly yielded U–Pb ages of 250–240 Ma and relatively high Th/U ratios(>0.2).These secondary domains are considered to have been formed by solid-state recrystallization during thermal overprints associated with intrusions of Hida granitoids.Available whole-rock geochemical and Sr–Nd isotope data as well as zircon age spectra corroborate that the Hida Belt comprises the Paleozoic–Mesozoic Cordilleran arc system built upon the margin of the North China Craton,together with the YeongnamMassif in southern Korea.The arcmagmatismalong this systemwas commenced in the Carboniferous and culminated in the Permian–Triassic transition period.Highly positiveεHf(t)values(>+12)of late Carboniferous to early Permian detrital zircons in the Hida paragneisses indicate that there was significant input from the depleted asthenospheric mantle and/or its crustal derivatives in the early stage of arc magmatism.On the other hand,near-chondriticεHf(t)values(+5 to−2)of magmatic zircons from late Permian Hida orthogneisses suggest a lithospheric mantle origin.Hf isotopic differences between magmatic zircon cores and the secondary rims observed in some orthogneiss samples clearly indicate that the zircons were chemically open to fluids or melts during thermal overprints.Resumed highly positive zirconεHf(t)values(>+9)shared by Early Jurassic granitoids in the Hida Belt and Yeongnam Massif may reflect reworking of the Paleozoic arc crust.展开更多
Background and aims:The persistence of pain in patients who underwent cholecystectomy primarily for biliary dyskinesia has been associated with gall bladder ejection fraction(GBEF)found on hepatobiliary iminodiacetic ...Background and aims:The persistence of pain in patients who underwent cholecystectomy primarily for biliary dyskinesia has been associated with gall bladder ejection fraction(GBEF)found on hepatobiliary iminodiacetic acid(HIDA)scan.Cholecystectomy is a definitive treatment for cholelithiasis but is questionable in biliary dyskinesia.During the postoperative follow-up,gastroenterologists and surgeons often found that some patients with biliary dyskinesia continue to experience biliary pain even after surgery.This study aims to investigate whether the value of GBEF found on the HIDA scan predicts the persistence of pain after cholecystectomy in patients with biliary dyskinesia(EF<35%on HIDA scan).Methods:It is a retrospective cohort study conducted at Kern Medical by recruiting patients from November 2019 to October 2022 in consecutive manner.It is a single sample study consisting of post-cholecystectomy biliary dyskinesia patients with dichotomous outcomes,i.e.,persistent typical recurrent epigastric or right upper quadrant pain with/without meals versus no pain.The primary outcome was the presence of pain 30 days after the cholecystectomy.Univariate analysis was performed with some of the bivariate indicators and continuous predictors,which contained fewer missing elements and had more variation.Results:Univariate logistic regression suggested that HIDA GBEF as a continuous variable does not suggest a relationship with pain after surgery(p=0.3951).A ROC analysis suggested a cutoff of HIDA GBEF=16(AUC=0.60,Specificity=0.5455,Sensitivity=0.7333).Conclusion:Our study does not support the relationship between GBEF found on HIDA scan to improved outcomes after the surgery.But larger controlled trials comparing outcomes of the patients with biliary dyskinesia who did and didn't undergo cholecystectomy are needed to look for other factors.展开更多
Let（S）L<sup>2</sup>（S’（IR）,μ）（S）<sup>*</sup> be the Gel’fand triple over the white noise space （S’（IR）,μ）.Let（e<sub>n</sub>,n≥0）be the ONB of L<sup>2</s...Let（S）L<sup>2</sup>（S’（IR）,μ）（S）<sup>*</sup> be the Gel’fand triple over the white noise space （S’（IR）,μ）.Let（e<sub>n</sub>,n≥0）be the ONB of L<sup>2</sup>（IR）consisting of the eigenfunctions of the s.a. operator-（d/（dt））<sup>2</sup>+1+t<sup>2</sup>.In this paper the Euler operator △<sub>E</sub> is defined as the sum ∑<sub>i</sub>【,e<sub>i</sub>)<sub>i</sub>, where <sub>i</sub> stands for the differential operator D<sub>ei</sub>.It is shown that △<sub>E</sub> is the infinitesimal gen- erator of the semigroup（T<sub>t</sub>）,where(T<sub>t</sub>)（x）=（e<sup>t</sup>x）for ∈（S）.Similarly to the finite dimensional case,the λ-order homogeneous test functionals are characterized by the Euler equa- tion:△<sub>E</sub>=λ.Via this characterization the λ-order homogeneous Hida distributions are defined and their properties are worked out.展开更多
In this paper, the generalized local time of the indefinite Wiener integral Xt is discussed through white noise approach, which means to regard the local time as a Hida distribution. Moreover, similar result is also o...In this paper, the generalized local time of the indefinite Wiener integral Xt is discussed through white noise approach, which means to regard the local time as a Hida distribution. Moreover, similar result is also obtained in case of two independent Brownian motions by using the similar approach.展开更多
基金jointly supported by a Basic Research Project(20-3111-1:Geological survey in the Korean Peninsula and publication of the geological maps)of the Korea Institute of Geoscience and Mineral Resources,funded by the Ministry of Science and ICT,Korearesearch grants from the Korea Basic Science Institute(C070110,C030120).
文摘Zircon U–Pb and Hf isotope data integrated in this study for magmatic and metamorphic rocks fromthe Hida Belt,southwest Japan,lead to a new understanding of the evolution of the Cordilleran arc system along the ancestral margins of present-day Northeast Asia.Ion microprobe data for magmatic zircon domains from eight mafic tointermediate orthogneisses in the Tateyama and Tsunogawa areas yielded weighted mean 206Pb/238U ages spanning the entire Permian period(302–254 Ma).Under cathodoluminescence,primary magmatic growth zones in the zircon crystals were observed to be partially or completely replaced by inward-penetrating,irregularly curved featureless or weakly zoned secondary domains that mostly yielded U–Pb ages of 250–240 Ma and relatively high Th/U ratios(>0.2).These secondary domains are considered to have been formed by solid-state recrystallization during thermal overprints associated with intrusions of Hida granitoids.Available whole-rock geochemical and Sr–Nd isotope data as well as zircon age spectra corroborate that the Hida Belt comprises the Paleozoic–Mesozoic Cordilleran arc system built upon the margin of the North China Craton,together with the YeongnamMassif in southern Korea.The arcmagmatismalong this systemwas commenced in the Carboniferous and culminated in the Permian–Triassic transition period.Highly positiveεHf(t)values(>+12)of late Carboniferous to early Permian detrital zircons in the Hida paragneisses indicate that there was significant input from the depleted asthenospheric mantle and/or its crustal derivatives in the early stage of arc magmatism.On the other hand,near-chondriticεHf(t)values(+5 to−2)of magmatic zircons from late Permian Hida orthogneisses suggest a lithospheric mantle origin.Hf isotopic differences between magmatic zircon cores and the secondary rims observed in some orthogneiss samples clearly indicate that the zircons were chemically open to fluids or melts during thermal overprints.Resumed highly positive zirconεHf(t)values(>+9)shared by Early Jurassic granitoids in the Hida Belt and Yeongnam Massif may reflect reworking of the Paleozoic arc crust.
文摘Background and aims:The persistence of pain in patients who underwent cholecystectomy primarily for biliary dyskinesia has been associated with gall bladder ejection fraction(GBEF)found on hepatobiliary iminodiacetic acid(HIDA)scan.Cholecystectomy is a definitive treatment for cholelithiasis but is questionable in biliary dyskinesia.During the postoperative follow-up,gastroenterologists and surgeons often found that some patients with biliary dyskinesia continue to experience biliary pain even after surgery.This study aims to investigate whether the value of GBEF found on the HIDA scan predicts the persistence of pain after cholecystectomy in patients with biliary dyskinesia(EF<35%on HIDA scan).Methods:It is a retrospective cohort study conducted at Kern Medical by recruiting patients from November 2019 to October 2022 in consecutive manner.It is a single sample study consisting of post-cholecystectomy biliary dyskinesia patients with dichotomous outcomes,i.e.,persistent typical recurrent epigastric or right upper quadrant pain with/without meals versus no pain.The primary outcome was the presence of pain 30 days after the cholecystectomy.Univariate analysis was performed with some of the bivariate indicators and continuous predictors,which contained fewer missing elements and had more variation.Results:Univariate logistic regression suggested that HIDA GBEF as a continuous variable does not suggest a relationship with pain after surgery(p=0.3951).A ROC analysis suggested a cutoff of HIDA GBEF=16(AUC=0.60,Specificity=0.5455,Sensitivity=0.7333).Conclusion:Our study does not support the relationship between GBEF found on HIDA scan to improved outcomes after the surgery.But larger controlled trials comparing outcomes of the patients with biliary dyskinesia who did and didn't undergo cholecystectomy are needed to look for other factors.
基金Supported by the National Natural Science Foundation of China
文摘Let（S）L<sup>2</sup>（S’（IR）,μ）（S）<sup>*</sup> be the Gel’fand triple over the white noise space （S’（IR）,μ）.Let（e<sub>n</sub>,n≥0）be the ONB of L<sup>2</sup>（IR）consisting of the eigenfunctions of the s.a. operator-（d/（dt））<sup>2</sup>+1+t<sup>2</sup>.In this paper the Euler operator △<sub>E</sub> is defined as the sum ∑<sub>i</sub>【,e<sub>i</sub>)<sub>i</sub>, where <sub>i</sub> stands for the differential operator D<sub>ei</sub>.It is shown that △<sub>E</sub> is the infinitesimal gen- erator of the semigroup（T<sub>t</sub>）,where(T<sub>t</sub>)（x）=（e<sup>t</sup>x）for ∈（S）.Similarly to the finite dimensional case,the λ-order homogeneous test functionals are characterized by the Euler equa- tion:△<sub>E</sub>=λ.Via this characterization the λ-order homogeneous Hida distributions are defined and their properties are worked out.
基金Supported by the National Natural Science Foundation of China ( 11061032,30973586)the Young Fund of Northwest University for Nationalities (X2009-003)
基金Supported by NSFC(No.11061032)Colleges and Universities Scientific Research Plan of Gansu Province for Postgraduate Tutor(No.1205-07)Colleges and Universities Fundamental Research Funds Project of Gansu Province(2012)
基金Supported by the National Natural Science Foundation of China(Grant Nos.1106103230973586)
文摘In this paper, the generalized local time of the indefinite Wiener integral Xt is discussed through white noise approach, which means to regard the local time as a Hida distribution. Moreover, similar result is also obtained in case of two independent Brownian motions by using the similar approach.
