BACKGROUND A solitary fibrous tumor(SFT)is often located in the pleura,while SFT of the pancreas is extremely rare.Here,we report a case of SFT of the pancreas and discuss imaging,histopathology,and immunohistochemist...BACKGROUND A solitary fibrous tumor(SFT)is often located in the pleura,while SFT of the pancreas is extremely rare.Here,we report a case of SFT of the pancreas and discuss imaging,histopathology,and immunohistochemistry for accurate diagnosis and treatment.CASE SUMMARY A 54-year-old man presented to our hospital with pancreatic occupancy for over a month.There were no previous complaints of discomfort.His blood pressure was normal.Blood glucose,tumor markers,and enhanced computed tomography(CT)suggested a malignant tumor.Because the CT appearance of pancreatic cancer varies,we could not confirm the diagnosis;therefore,we performed endoscopic ultrasound-guided fine-needle biopsy(EUS-FNB).Pathology and immunohistochemistry were consistent with SFT of the pancreas.The posto-perative pathology and immunohistochemistry were consistent with the puncture results.The patient presented for a follow-up examination one month after discharge with no adverse effects.CONCLUSION Other diseases must be excluded in patients with a pancreatic mass that cannot be diagnosed.CT and pathological histology have diagnostic value for pancreatic tumors.Endoscopic puncture biopsy under ultrasound can help diagnose pancreatic masses that cannot be diagnosed preoperatively.Surgery is an effective treatment for SFT of the pancreas;however,long-term follow-up is strongly recommended because of the possibility of malignant transformation of the tumor.展开更多
This paper deduced the temporal evolution of the magnetic field through a series of high-resolution vector magnetograms and calculated the fine distribution map of current density during an X9.3-class flare eruptions ...This paper deduced the temporal evolution of the magnetic field through a series of high-resolution vector magnetograms and calculated the fine distribution map of current density during an X9.3-class flare eruptions using Ampère's law.The results show that a pair of conjugate current ribbons exist on both sides of the magnetic neutral line in this active region,and these conjugate current ribbons persist before,during,and after the flare.It was observed that the X9.3-class flare brightened in the form of a bright core and evolved into a double-ribbon flare over time.Importantly,the position of the double-ribbon flare matches the position of the current ribbons with high accuracy,and their morphologies are very similar.By investigating the complexity of current density and flare morphology,we discovered a potential connection between the eruption of major flares and the characteristics of current density.展开更多
In this paper we investigate scalar perturbation over a Frolov black hole(BH), which is a regular BH induced by the quantum gravity effect. The quasinormal frequencies of a scalar field always consistently reside in t...In this paper we investigate scalar perturbation over a Frolov black hole(BH), which is a regular BH induced by the quantum gravity effect. The quasinormal frequencies of a scalar field always consistently reside in the lower half-plane, and the time-domain evolution of the field demonstrates a decaying behavior, with the late-time tail exhibiting a power-law pattern. These observations collectively suggest the stability of a Frolov BH against scalar perturbation.Additionally, our study reveals that the quantum gravity effect leads to slower decay modes. For the case of the angular quantum number l = 0, the oscillation exhibits non-monotonic behavior with the quantum gravity parameter α_(0). However, once l ≥ 1, the angular quantum number surpasses the influence of the quantum gravity effect.展开更多
Ultrafine steel slag powder(shield powder)was prepared by grinding ordinary steel slag with a functional compound.As a substitute for aluminum hydroxide,the shield powder was combined with rubber to prepare flame-reta...Ultrafine steel slag powder(shield powder)was prepared by grinding ordinary steel slag with a functional compound.As a substitute for aluminum hydroxide,the shield powder was combined with rubber to prepare flame-retardant composites.Vulcanization tests showed that the incorporation of shield powder enhances the crosslinkage of the composite and speeds up the curing rate.The gaseous products formed in the pyrolysis process are mainly hydrocarbons.Mechanical and combustion tests revealed that the introduction of shield powder improves flame-retardant performance without sacrificing mechanical properties.Specifically,the optimum substitution ratio of shield powder for aluminum hydroxide is 50.0%.In this case,the composite has the highest degree of graphitization and exhibits excellent flame-retardant performance.展开更多
We investigate the impacts of dark energy on constraining massive(active/sterile)neutrinos in interacting dark energy(IDE)models by using the current observations.We employ two typical IDE models,the interacting w col...We investigate the impacts of dark energy on constraining massive(active/sterile)neutrinos in interacting dark energy(IDE)models by using the current observations.We employ two typical IDE models,the interacting w cold dark matter(IwCDM)model and the interacting holographic dark energy(IHDE)model,to make an analysis.To avoid large-scale instability,we use the parameterized post-Friedmann approach to calculate the cosmological perturbations in the IDE models.The cosmological observational data used in this work include the Planck cosmic microwave background(CMB)anisotropies data,the baryon acoustic oscillation data,the type Ia supernovae data,the direct measurement of the Hubble constant,the weak lensing data,the redshift-space distortion data,and the CMB lensing data.We find that the dark energy properties could influence the constraint limits of active neutrino mass and sterile neutrino parameters in the IDE models.We also find that the dark energy properties could influence the constraints on the coupling strength parameterβ,and a positive coupling constant,β>0,can be detected at the 2.5σstatistical significance for the IHDE+νs model by using the all-data combination.In addition,we also discuss the"Hubble tension"issue in these scenarios.We find that the H0 tension can be effectively relieved by considering massive sterile neutrinos,and in particular in the IHDE+νsmodel the H0 tension can be reduced to be at the 1.28σlevel.展开更多
We investigate how the dark energy properties impact the constraints on the total neutrino mass in interacting dark energy（IDE）models. In this study, we focus on two typical interacting dynamical dark energy models,...We investigate how the dark energy properties impact the constraints on the total neutrino mass in interacting dark energy（IDE）models. In this study, we focus on two typical interacting dynamical dark energy models, i.e., the interacting w cold dark matter（IwCDM） model and the interacting holographic dark energy（IHDE） model. To avoid the large-scale instability problem in IDE models, we apply the parameterized post-Friedmann approach to calculate the perturbation of dark energy. We employ the Planck 2015 cosmic microwave background temperature and polarization data, combined with low-redshift measurements on baryon acoustic oscillation distance scales, type Ia supernovae, and the Hubble constant, to constrain the cosmological parameters. We find that the dark energy properties could influence the constraint limits on the total neutrino mass. Once dynamical dark energy is considered in the IDE models, the upper bounds of ∑mν will be changed. By considering the values of χmin2 , we find that in these IDE models the normal hierarchy case is slightly preferred over the inverted hierarchy case; for example, ?χ2= 2.720 is given in the IHDE+∑mν model. In addition, we also find that in the Iw CDM+∑mν model β = 0 is consistent with current observational data inside the 1σ range, and in the IHDE+∑mν model β > 0 is favored at more than 2σ level.展开更多
Mitochondrial trifunctional protein(MTP)is a multienzyme complex,which catalyzes the last three steps of mitochondrial p-oxidation of the long-chain fatty acids.Structurally,MTP consists of four a-subunits and four P-...Mitochondrial trifunctional protein(MTP)is a multienzyme complex,which catalyzes the last three steps of mitochondrial p-oxidation of the long-chain fatty acids.Structurally,MTP consists of four a-subunits and four P-subunits,which are encoded by HADHA gene(OMIM 600890)and HADHB gene(OMIM 143450),respectively.Mutations in HADHA or HADHB lead to varying degrees of decline in MTP activity,that in turn results in three types of clinical manifestations:a severe phenotype with neonatal onset,a hepatic phenotype with infantile onset,and a neuromyopathic phenotype with later onset.展开更多
In this paper, we investigate the observational constraints on the scenario of vacuum energy interacting with cold dark matter.We consider eight typical interaction forms in such an interacting vacuum energy scenario....In this paper, we investigate the observational constraints on the scenario of vacuum energy interacting with cold dark matter.We consider eight typical interaction forms in such an interacting vacuum energy scenario. The observational data used in this work to constrain these models include the JLA sample of type Ia supernovae observation, the Planck 2015 distance priors data of cosmic microwave background anisotropies observation, the baryon acoustic oscillations data, and the Hubble constant direct measurement. We find that the current observational data almost equally favor these interacting vacuum energy models. We also find that for all these models of vacuum energy interacting with cold dark matter the case of no interaction is actually well consistent with the current observational data within 1σ range.展开更多
Multi-messenger gravitational wave(GW)observation for binary neutron star merger events could provide a rather useful tool to explore the evolution of the Universe.In particular,for the third-generation GW detectors,i...Multi-messenger gravitational wave(GW)observation for binary neutron star merger events could provide a rather useful tool to explore the evolution of the Universe.In particular,for the third-generation GW detectors,i.e.the Einstein Telescope(ET)and the Cosmic Explorer(CE),proposed to be built in Europe and the U.S.,respectively,lots of GW standard sirens with known redshifts could be obtained,which would exert great impacts on the cosmological parameter estimation.The total neutrino mass could be measured by cosmological observations,but such a measurement is model-dependent and currently only gives an upper limit.In this work,we wish to investigate whether the GW standard sirens observed by ET and CE could help improve the constraint on the neutrino mass,in particular in the interacting dark energy(IDE)models.We find that the GW standard siren observations from ET and CE can only slightly improve the constraint on the neutrino mass in the IDE models,compared to the current limit.The improvements in the IDE models are weaker than those in the standard cosmological model.Although the limit on neutrino mass can only be slightly updated,the constraints on other cosmological parameters can be significantly improved by using the GW observations.展开更多
In this work,we investigate the constraints on the total neutrino mass in the scenario of vacuum energy interacting with cold dark matter(abbreviated as IACDM)by using the latest cosmological observations.We consider ...In this work,we investigate the constraints on the total neutrino mass in the scenario of vacuum energy interacting with cold dark matter(abbreviated as IACDM)by using the latest cosmological observations.We consider four typical interaction forms,i.e.Q=βHρde,Q=βHρc,Q=βH0ρde,and Q=βH0ρc,in the IACDM scenario.To avoid the large-scale instability problem in interacting dark energy models,we employ the extended parameterized post-Friedmann method for interacting dark energy to calculate the perturbation evolution of dark energy in these models.The observational data used in this work include the cosmic microwave background(CMB)measurements from the Planck 2018 data release,the baryon acoustic oscillation(BAO)data,the type Ia supernovae(SN)observation(Pantheon compilation),and the 2019 local distance ladder measurement of the Hubble constant H0 from the Hubble Space Telescope.We find that,compared with those in the ACDM+∑mv model,the constrains on∑mv are looser in the four IACDM+∑mv models.When considering the three mass hierarchies of neutrinos,the constraints on∑mv are tightest in the degenerate hierarchy case and loosest in the inverted hierarchy case.In addition,in the four IACDM+∑mv models,the values of coupling parameterβare larger using the CMB+BAO+SN+H0 data combination than that using the CMB+BAO+SN data combination,andβ>0 is favored at more than 1σlevel when using CMB+BAO+SN+H0 data combination.The issue of the H0 tension is also discussed in this paper.We find that,compared with the ACDM+∑mv model,the H0 tension can be alleviated in the IACDM+∑mv model to some extent.展开更多
In this paper, we consider the singular isothermal sphere lensing model that has a spherically symmetric power-law mass dis- tribution ρtot（r） - r-γ. We investigate whether the mass density power-law index y is co...In this paper, we consider the singular isothermal sphere lensing model that has a spherically symmetric power-law mass dis- tribution ρtot（r） - r-γ. We investigate whether the mass density power-law index y is cosmologically evolutionary by using the strong gravitational lensing （SGL） observation, in combination with other cosmological observations. We also check whether the constraint result of y is affected by the cosmological model, by considering several simple dynamical dark energy models. We find that the constraint on y is mainly decided by the SGL observation and independent of the cosmological model, and we find no evidence for the evolution of y from the SGL observation.展开更多
文摘BACKGROUND A solitary fibrous tumor(SFT)is often located in the pleura,while SFT of the pancreas is extremely rare.Here,we report a case of SFT of the pancreas and discuss imaging,histopathology,and immunohistochemistry for accurate diagnosis and treatment.CASE SUMMARY A 54-year-old man presented to our hospital with pancreatic occupancy for over a month.There were no previous complaints of discomfort.His blood pressure was normal.Blood glucose,tumor markers,and enhanced computed tomography(CT)suggested a malignant tumor.Because the CT appearance of pancreatic cancer varies,we could not confirm the diagnosis;therefore,we performed endoscopic ultrasound-guided fine-needle biopsy(EUS-FNB).Pathology and immunohistochemistry were consistent with SFT of the pancreas.The posto-perative pathology and immunohistochemistry were consistent with the puncture results.The patient presented for a follow-up examination one month after discharge with no adverse effects.CONCLUSION Other diseases must be excluded in patients with a pancreatic mass that cannot be diagnosed.CT and pathological histology have diagnostic value for pancreatic tumors.Endoscopic puncture biopsy under ultrasound can help diagnose pancreatic masses that cannot be diagnosed preoperatively.Surgery is an effective treatment for SFT of the pancreas;however,long-term follow-up is strongly recommended because of the possibility of malignant transformation of the tumor.
基金supported by the Natural Natural Science Foundation of China(NSFC,grant No.12303062)Sichuan Science and Technology Program(2023NSFSC1351)+1 种基金Joint Funds of the National Natural Science Foundation of China(NSFC,grant No.U1931116)the Project Supported by the Specialized Research Fund for State Key Laboratories。
文摘This paper deduced the temporal evolution of the magnetic field through a series of high-resolution vector magnetograms and calculated the fine distribution map of current density during an X9.3-class flare eruptions using Ampère's law.The results show that a pair of conjugate current ribbons exist on both sides of the magnetic neutral line in this active region,and these conjugate current ribbons persist before,during,and after the flare.It was observed that the X9.3-class flare brightened in the form of a bright core and evolved into a double-ribbon flare over time.Importantly,the position of the double-ribbon flare matches the position of the current ribbons with high accuracy,and their morphologies are very similar.By investigating the complexity of current density and flare morphology,we discovered a potential connection between the eruption of major flares and the characteristics of current density.
基金supported by National Key R&D Program of China (no. 2020YFC2201400)the Natural Science Foundation of China under grant nos 12375055, 12347159 and 12305068+2 种基金the Postgraduate Research & Practice Innovation Program of Jiangsu Province under grant no. KYCX22_3451the Scientific Research Funding Project of the Education Department of Liaoning Province under grant no. JYTQN2023090the Natural Science Foundation of Liaoning Province of China under grant no. 2023-BSBA-229。
文摘In this paper we investigate scalar perturbation over a Frolov black hole(BH), which is a regular BH induced by the quantum gravity effect. The quasinormal frequencies of a scalar field always consistently reside in the lower half-plane, and the time-domain evolution of the field demonstrates a decaying behavior, with the late-time tail exhibiting a power-law pattern. These observations collectively suggest the stability of a Frolov BH against scalar perturbation.Additionally, our study reveals that the quantum gravity effect leads to slower decay modes. For the case of the angular quantum number l = 0, the oscillation exhibits non-monotonic behavior with the quantum gravity parameter α_(0). However, once l ≥ 1, the angular quantum number surpasses the influence of the quantum gravity effect.
基金supported by the University Synergy Innovation Program of Anhui Province(GXXT-2020-072)Anhui Province Science Foundation for Excellent Young Scholars(2208085J19).
文摘Ultrafine steel slag powder(shield powder)was prepared by grinding ordinary steel slag with a functional compound.As a substitute for aluminum hydroxide,the shield powder was combined with rubber to prepare flame-retardant composites.Vulcanization tests showed that the incorporation of shield powder enhances the crosslinkage of the composite and speeds up the curing rate.The gaseous products formed in the pyrolysis process are mainly hydrocarbons.Mechanical and combustion tests revealed that the introduction of shield powder improves flame-retardant performance without sacrificing mechanical properties.Specifically,the optimum substitution ratio of shield powder for aluminum hydroxide is 50.0%.In this case,the composite has the highest degree of graphitization and exhibits excellent flame-retardant performance.
基金the National Natural Science Foundation of China(Grant Nos.11947022,11975072,11835009,11875102,11522540,11690021)the Liaoning Revitalization Talents Program(Grant No.XLYC1905011)+3 种基金the Fundamental Research Funds for the Central Universities(Grant No.N2005030)the National Program for Support of Top-Notch Young Professionalsthe 2019 Annual Scientific Research Funding Project of the Education Department of Liaoning Province(Grant No.LJC201915)the Doctoral Research Project of Shenyang Normal University(Grant No.BS201844)。
文摘We investigate the impacts of dark energy on constraining massive(active/sterile)neutrinos in interacting dark energy(IDE)models by using the current observations.We employ two typical IDE models,the interacting w cold dark matter(IwCDM)model and the interacting holographic dark energy(IHDE)model,to make an analysis.To avoid large-scale instability,we use the parameterized post-Friedmann approach to calculate the cosmological perturbations in the IDE models.The cosmological observational data used in this work include the Planck cosmic microwave background(CMB)anisotropies data,the baryon acoustic oscillation data,the type Ia supernovae data,the direct measurement of the Hubble constant,the weak lensing data,the redshift-space distortion data,and the CMB lensing data.We find that the dark energy properties could influence the constraint limits of active neutrino mass and sterile neutrino parameters in the IDE models.We also find that the dark energy properties could influence the constraints on the coupling strength parameterβ,and a positive coupling constant,β>0,can be detected at the 2.5σstatistical significance for the IHDE+νs model by using the all-data combination.In addition,we also discuss the"Hubble tension"issue in these scenarios.We find that the H0 tension can be effectively relieved by considering massive sterile neutrinos,and in particular in the IHDE+νsmodel the H0 tension can be reduced to be at the 1.28σlevel.
基金supported by the National Natural Science Foundation of China(Grant Nos.11875102,11835009,11522540,11690021,and61603265)the National Program for Support of Top-Notch Young ProfessionalsDoctoral Research Project of Shenyang Normal University(Grant Nos.BS201844,and BS201702)
文摘We investigate how the dark energy properties impact the constraints on the total neutrino mass in interacting dark energy（IDE）models. In this study, we focus on two typical interacting dynamical dark energy models, i.e., the interacting w cold dark matter（IwCDM） model and the interacting holographic dark energy（IHDE） model. To avoid the large-scale instability problem in IDE models, we apply the parameterized post-Friedmann approach to calculate the perturbation of dark energy. We employ the Planck 2015 cosmic microwave background temperature and polarization data, combined with low-redshift measurements on baryon acoustic oscillation distance scales, type Ia supernovae, and the Hubble constant, to constrain the cosmological parameters. We find that the dark energy properties could influence the constraint limits on the total neutrino mass. Once dynamical dark energy is considered in the IDE models, the upper bounds of ∑mν will be changed. By considering the values of χmin2 , we find that in these IDE models the normal hierarchy case is slightly preferred over the inverted hierarchy case; for example, ?χ2= 2.720 is given in the IHDE+∑mν model. In addition, we also find that in the Iw CDM+∑mν model β = 0 is consistent with current observational data inside the 1σ range, and in the IHDE+∑mν model β > 0 is favored at more than 2σ level.
基金This work was supported by grants from the National Key Research and Development Program of China(No.2016YFC0901505)the National Natural Science Foundation of China(No.81571220)the Beijing Key Laboratory of Molecular Diagnosis and Study on Pediatric Genetic Diseases(No.Z141107004414036,BZ0317).
文摘Mitochondrial trifunctional protein(MTP)is a multienzyme complex,which catalyzes the last three steps of mitochondrial p-oxidation of the long-chain fatty acids.Structurally,MTP consists of four a-subunits and four P-subunits,which are encoded by HADHA gene(OMIM 600890)and HADHB gene(OMIM 143450),respectively.Mutations in HADHA or HADHB lead to varying degrees of decline in MTP activity,that in turn results in three types of clinical manifestations:a severe phenotype with neonatal onset,a hepatic phenotype with infantile onset,and a neuromyopathic phenotype with later onset.
基金supported by the National Natural Science Foundation of China(Grant Nos.11875102,11835009,11522540,and 11690021)the National Program for Support of Top-Notch Young Professionals,and Doctoral Research Project of Shenyang Normal University(Grant Nos.BS201844,and BS201702)
文摘In this paper, we investigate the observational constraints on the scenario of vacuum energy interacting with cold dark matter.We consider eight typical interaction forms in such an interacting vacuum energy scenario. The observational data used in this work to constrain these models include the JLA sample of type Ia supernovae observation, the Planck 2015 distance priors data of cosmic microwave background anisotropies observation, the baryon acoustic oscillations data, and the Hubble constant direct measurement. We find that the current observational data almost equally favor these interacting vacuum energy models. We also find that for all these models of vacuum energy interacting with cold dark matter the case of no interaction is actually well consistent with the current observational data within 1σ range.
基金This work was supported by the National Natural Science Foundation of China(Grants Nos.11975072,11835009,11875102,and 11690021)the Liaoning Revitalization Talents Program(Grant No.XLYC1905011)+2 种基金the Fundamental Research Funds for the Central Universities(Grant No.N2005030)the National 111 Project of China(Grant No.B16009)the Science Research Grants from the China Manned Space Project(Grant No.CMS-CSST-2021-B01).
文摘Multi-messenger gravitational wave(GW)observation for binary neutron star merger events could provide a rather useful tool to explore the evolution of the Universe.In particular,for the third-generation GW detectors,i.e.the Einstein Telescope(ET)and the Cosmic Explorer(CE),proposed to be built in Europe and the U.S.,respectively,lots of GW standard sirens with known redshifts could be obtained,which would exert great impacts on the cosmological parameter estimation.The total neutrino mass could be measured by cosmological observations,but such a measurement is model-dependent and currently only gives an upper limit.In this work,we wish to investigate whether the GW standard sirens observed by ET and CE could help improve the constraint on the neutrino mass,in particular in the interacting dark energy(IDE)models.We find that the GW standard siren observations from ET and CE can only slightly improve the constraint on the neutrino mass in the IDE models,compared to the current limit.The improvements in the IDE models are weaker than those in the standard cosmological model.Although the limit on neutrino mass can only be slightly updated,the constraints on other cosmological parameters can be significantly improved by using the GW observations.
基金supported by the National Natural Science Foundation of China(Grant Nos.11975072,11875102,11835009,and 11690021)the Liaoning Revitalization Talents Program(Grant No.XLYC1905011)+1 种基金the Fundamental Research Funds for the Central Universities(Grant No.N2005030)the Top-Notch Young Talents Program of China(W02070050)。
文摘In this work,we investigate the constraints on the total neutrino mass in the scenario of vacuum energy interacting with cold dark matter(abbreviated as IACDM)by using the latest cosmological observations.We consider four typical interaction forms,i.e.Q=βHρde,Q=βHρc,Q=βH0ρde,and Q=βH0ρc,in the IACDM scenario.To avoid the large-scale instability problem in interacting dark energy models,we employ the extended parameterized post-Friedmann method for interacting dark energy to calculate the perturbation evolution of dark energy in these models.The observational data used in this work include the cosmic microwave background(CMB)measurements from the Planck 2018 data release,the baryon acoustic oscillation(BAO)data,the type Ia supernovae(SN)observation(Pantheon compilation),and the 2019 local distance ladder measurement of the Hubble constant H0 from the Hubble Space Telescope.We find that,compared with those in the ACDM+∑mv model,the constrains on∑mv are looser in the four IACDM+∑mv models.When considering the three mass hierarchies of neutrinos,the constraints on∑mv are tightest in the degenerate hierarchy case and loosest in the inverted hierarchy case.In addition,in the four IACDM+∑mv models,the values of coupling parameterβare larger using the CMB+BAO+SN+H0 data combination than that using the CMB+BAO+SN data combination,andβ>0 is favored at more than 1σlevel when using CMB+BAO+SN+H0 data combination.The issue of the H0 tension is also discussed in this paper.We find that,compared with the ACDM+∑mv model,the H0 tension can be alleviated in the IACDM+∑mv model to some extent.
基金supported by the National Natural Science Foundation of China(Grant Nos.11522540,and 11690021)the Top-Notch Young Talents Program of China,and the Provincial Department of Education of Liaoning(Grant No.L2012087)
文摘In this paper, we consider the singular isothermal sphere lensing model that has a spherically symmetric power-law mass dis- tribution ρtot（r） - r-γ. We investigate whether the mass density power-law index y is cosmologically evolutionary by using the strong gravitational lensing （SGL） observation, in combination with other cosmological observations. We also check whether the constraint result of y is affected by the cosmological model, by considering several simple dynamical dark energy models. We find that the constraint on y is mainly decided by the SGL observation and independent of the cosmological model, and we find no evidence for the evolution of y from the SGL observation.
