Aorta–right atrial tunnel(ARAT)is an extremely rare congenital heart malformation with an average age of diagnosis of approximately 20 years.Its clinical symptoms are varied and often atypical.ARAT usually originates...Aorta–right atrial tunnel(ARAT)is an extremely rare congenital heart malformation with an average age of diagnosis of approximately 20 years.Its clinical symptoms are varied and often atypical.ARAT usually originates from the left or right sinus of Valsalva.In this case report,we aim to share a rare case of ARAT originating from the noncoronary sinus in an infant.The patient presented with a cardiac murmur,a dilated right heart,and a tortuous tunnel originating from the dilated noncoronary sinus and terminating at the right atrium in echocardiogram and computed tomography angiography.The patient underwent surgical closure of the tunnel to prevent possible heart failure.Postoperative echocardiography revealed complete closure of the tunnel with no residual ffow.No evidence of aortic valve regurgitation or aortic root dilation was detected during 6-month follow-up.展开更多
Correction to:Radiation Detection Technology and Methods(2024)8:1-1105.https://doi.org/10.1007/s41605-024-00463-y.In this article all authors name was missing in the springer link.It has been corrected.The original ar...Correction to:Radiation Detection Technology and Methods(2024)8:1-1105.https://doi.org/10.1007/s41605-024-00463-y.In this article all authors name was missing in the springer link.It has been corrected.The original article has been corrected.展开更多
Complex compositions and structural designs severely restrict the practical application of high-temperature microwave-infrared compatible stealth coatings.To address this issue,high-temperature microwave-infrared comp...Complex compositions and structural designs severely restrict the practical application of high-temperature microwave-infrared compatible stealth coatings.To address this issue,high-temperature microwave-infrared compatible stealth coatings of a single 8 wt%yttria-stabilized zirconia(8YSZ)component are proposed for the first time.Originating from conductive,interfacial and dipole polarization losses,8YSZ coating presents superior microwave absorbing properties at 900℃,including strong absorption(minimum reflection loss(RL_(min))of-50 dB),a thin thickness of 1.5 mm,and a better effective absorption bandwidth(EAB)of 2 GHz.Moreover,it maintains low infrared emissivity(ε<0.3)in the infrared bands of 3-5μm compared with traditional materials.In contrast to the conventional strategy in which microwave-infrared compatible stealth materials are explored in the pool of“complex”multiple-component or metamaterial,this work reveals an avenue to look into materials with simple compositions realizing microwave-infrared compatible stealth simultaneously,which would be of both scientific and technological significance in the fields of stealth technology.Moreover,the present work reveals new applications of 8YSZ coatings in the field of high-temperature stealth technology.展开更多
The Circular Electron Positron Collider(CEPC)is a large scientific project initiated and hosted by China,fostered through extensive collaboration with international partners.The complex comprises four accelerators:a 3...The Circular Electron Positron Collider(CEPC)is a large scientific project initiated and hosted by China,fostered through extensive collaboration with international partners.The complex comprises four accelerators:a 30 GeV Linac,a 1.1 GeV Damping Ring,a Booster capable of achieving energies up to 180 GeV,and a Collider operating at varying energy modes(Z,W,H,and tt).The Linac and Damping Ring are situated on the surface,while the subterranean Booster and Collider are housed in a 100 km circumference underground tunnel,strategically accommodating future expansion with provisions for a potential Super Proton Proton Collider(SPPC).The CEPC primarily serves as a Higgs factory.In its baseline design with synchrotron radiation(SR)power of 30 MW per beam,it can achieve a luminosity of 5×10^(34)cm^(-2)s^(-1)per interaction point(IP),resulting in an integrated luminosity of 13 ab^(-1)for two IPs over a decade,producing 2.6 million Higgs bosons.Increasing the SR power to 50 MW per beam expands the CEPC's capability to generate 4.3 million Higgs bosons,facilitating precise measurements of Higgs coupling at sub-percent levels,exceeding the precision expected from the HL-LHC by an order of magnitude.This Technical Design Report(TDR)follows the Preliminary Conceptual Design Report(Pre-CDR,2015)and the Conceptual Design Report(CDR,2018),comprehensively detailing the machine's layout,performance metrics,physical design and analysis,technical systems design,R&D and prototyping efforts,and associated civil engineering aspects.Additionally,it includes a cost estimate and a preliminary construction timeline,establishing a framework for forthcoming engineering design phase and site selection procedures.Construction is anticipated to begin around 2027-2028,pending government approval,with an estimated duration of 8 years.The commencement of experiments and data collection could potentially be initiated in the mid-2030s.展开更多
Thermal/environmental barrier coatings(T/EBCs)are used to protect hot-section superalloys and/or ceramic matrix composite components from hot corrosion and oxidation;however,the majority of T/EBCs exhibit extremely hi...Thermal/environmental barrier coatings(T/EBCs)are used to protect hot-section superalloys and/or ceramic matrix composite components from hot corrosion and oxidation;however,the majority of T/EBCs exhibit extremely high thermal and ionic conductivities.Here,we obtain a novel rare-earth tantalate with excellent oxygen and thermal insulation via a high-entropy strategy.The high-entropy component(8RE_(1/8))TaO_(4)(RE=rare earth),which is designed by large size disorder and mass disorder,has been reassembled into a stabilized monoclinic structure.(8RE_(1/8))TaO_(4)had 30.0%–31.1%and 59.2%–67.5%lower intrinsic thermal conductivity than single-RE RETaO_(4)and 8(Y_(2)O_(3)–ZrO_(2))8YSZ at 1200℃,respectively,and exhibited lower intrinsic thermal conductivity across the entire temperature range of 100–1200℃.This is the result of strong scattering by the phonon–phonon,grain boundary,domain boundary,dislocation,and vacancy defects.The ionic conductivity of(8RE_(1/8))TaO_(4)is 3712–29,667 times lower than that of 8YSZ at 900℃,benefiting from the strong Ta–O bonding strength,low concentration of mobile oxygen vacancies and severe lattice distortions that impede carrier transport.Moreover,(8RE_(1/8))TaO_(4)had superior high-temperature stability and excellent mechanical properties.Analysis of above results demonstrates that(8RE_(1/8))TaO_(4)is a promising candidate for T/EBCs.展开更多
A high-speed and economical optical local access network system is proposed where bi-directional polarization multiplexing is applied to a bi-directional transmission. Experimental results using a prototype system con...A high-speed and economical optical local access network system is proposed where bi-directional polarization multiplexing is applied to a bi-directional transmission. Experimental results using a prototype system confirm low optical loss and environmental stabilities.展开更多
Polycyclic musks are widely used for cos- metics and other personal care and household cleaning products. The occurrence and removal of two representa- tive polycyclic musks, galaxolide （HHCB） and tonalide （AHTN） ...Polycyclic musks are widely used for cos- metics and other personal care and household cleaning products. The occurrence and removal of two representa- tive polycyclic musks, galaxolide （HHCB） and tonalide （AHTN） were investigated in three different processes of two sewage treatment plants （STPs） in Xi＇an, China. The samples were preconcentrated by solid phase extraction procedure and analyzed using a gas chromatography mass spectrometry （GC/MS） by a modified procedure. The HHCB was in the range of 82.8 to 182.5 ng.L1 in the influents and 22.6 to 103.9ng.L-1 in the effluents. The AHTN ranged from 11.0 to 19.3 ng. L-1 in the influents and 2.2 to 8.8 ng. I_~1 in the effluents. The removal efficiency of the two musks varied in the ranges of 43.1%-70.4% for HHCB and 54.2%-84.4% for AHTN. Concentrations of the two musks in aqueous phase of three processes slightly increased along the primary process, and significantly removed during the biologic treatment processes, revealing that the selected musks could be remarkably removed in varied activated sludge processes. Advanced processes of activated sludge did not show a significant superiority on selected musk removal compared to the conventional process. The selected musk removal mainly resulted from the adsorption function of activated sludge. There was no significant change of HHCB/AHTN ratios along the treatment flow, indicating that each sewage treatment structure had a similar removal efficiency for the two musks.展开更多
基金supported by the National Clinical Key Specialty Construction Project(Grant number:10000015Z155080000004)Shanghai Research Center for Pediatric Cardiovascular Diseases(Grant number:2023ZZ02024).
文摘Aorta–right atrial tunnel(ARAT)is an extremely rare congenital heart malformation with an average age of diagnosis of approximately 20 years.Its clinical symptoms are varied and often atypical.ARAT usually originates from the left or right sinus of Valsalva.In this case report,we aim to share a rare case of ARAT originating from the noncoronary sinus in an infant.The patient presented with a cardiac murmur,a dilated right heart,and a tortuous tunnel originating from the dilated noncoronary sinus and terminating at the right atrium in echocardiogram and computed tomography angiography.The patient underwent surgical closure of the tunnel to prevent possible heart failure.Postoperative echocardiography revealed complete closure of the tunnel with no residual ffow.No evidence of aortic valve regurgitation or aortic root dilation was detected during 6-month follow-up.
文摘Correction to:Radiation Detection Technology and Methods(2024)8:1-1105.https://doi.org/10.1007/s41605-024-00463-y.In this article all authors name was missing in the springer link.It has been corrected.The original article has been corrected.
基金supported by National Natural Science Foundation of China(No.52402078)Yunnan Major Scientific and Technological Projects(No.202302AG050010)+1 种基金the Yunnan Fundamental Research Projects(No.202201BE070001-008)the National Key R&D Program of China(No.2022YFB3708600)。
文摘Complex compositions and structural designs severely restrict the practical application of high-temperature microwave-infrared compatible stealth coatings.To address this issue,high-temperature microwave-infrared compatible stealth coatings of a single 8 wt%yttria-stabilized zirconia(8YSZ)component are proposed for the first time.Originating from conductive,interfacial and dipole polarization losses,8YSZ coating presents superior microwave absorbing properties at 900℃,including strong absorption(minimum reflection loss(RL_(min))of-50 dB),a thin thickness of 1.5 mm,and a better effective absorption bandwidth(EAB)of 2 GHz.Moreover,it maintains low infrared emissivity(ε<0.3)in the infrared bands of 3-5μm compared with traditional materials.In contrast to the conventional strategy in which microwave-infrared compatible stealth materials are explored in the pool of“complex”multiple-component or metamaterial,this work reveals an avenue to look into materials with simple compositions realizing microwave-infrared compatible stealth simultaneously,which would be of both scientific and technological significance in the fields of stealth technology.Moreover,the present work reveals new applications of 8YSZ coatings in the field of high-temperature stealth technology.
基金support from diverse funding sources,including the National Key Program for S&T Research and Development of the Ministry of Science and Technology(MOST),Yifang Wang's Science Studio of the Ten Thousand Talents Project,the CAS Key Foreign Cooperation Grant,the National Natural Science Foundation of China(NSFC)Beijing Municipal Science&Technology Commission,the CAS Focused Science Grant,the IHEP Innovation Grant,the CAS Lead Special Training Programthe CAS Center for Excellence in Particle Physics,the CAS International Partnership Program,and the CAS/SAFEA International Partnership Program for Creative Research Teams.
文摘The Circular Electron Positron Collider(CEPC)is a large scientific project initiated and hosted by China,fostered through extensive collaboration with international partners.The complex comprises four accelerators:a 30 GeV Linac,a 1.1 GeV Damping Ring,a Booster capable of achieving energies up to 180 GeV,and a Collider operating at varying energy modes(Z,W,H,and tt).The Linac and Damping Ring are situated on the surface,while the subterranean Booster and Collider are housed in a 100 km circumference underground tunnel,strategically accommodating future expansion with provisions for a potential Super Proton Proton Collider(SPPC).The CEPC primarily serves as a Higgs factory.In its baseline design with synchrotron radiation(SR)power of 30 MW per beam,it can achieve a luminosity of 5×10^(34)cm^(-2)s^(-1)per interaction point(IP),resulting in an integrated luminosity of 13 ab^(-1)for two IPs over a decade,producing 2.6 million Higgs bosons.Increasing the SR power to 50 MW per beam expands the CEPC's capability to generate 4.3 million Higgs bosons,facilitating precise measurements of Higgs coupling at sub-percent levels,exceeding the precision expected from the HL-LHC by an order of magnitude.This Technical Design Report(TDR)follows the Preliminary Conceptual Design Report(Pre-CDR,2015)and the Conceptual Design Report(CDR,2018),comprehensively detailing the machine's layout,performance metrics,physical design and analysis,technical systems design,R&D and prototyping efforts,and associated civil engineering aspects.Additionally,it includes a cost estimate and a preliminary construction timeline,establishing a framework for forthcoming engineering design phase and site selection procedures.Construction is anticipated to begin around 2027-2028,pending government approval,with an estimated duration of 8 years.The commencement of experiments and data collection could potentially be initiated in the mid-2030s.
基金supported by the National Natural Science Foundation of China(No.52402077)the Open Project of Shaanxi Laboratory(No.2021SXSYS-01-05)+1 种基金the Open Project of Yunnan Precious Metals Laboratory(No.YPML-2023050240)the Yunnan Fundamental Research Projects(Nos.202201BE070001-008,202201AT070192,and 202101BE070001-011).
文摘Thermal/environmental barrier coatings(T/EBCs)are used to protect hot-section superalloys and/or ceramic matrix composite components from hot corrosion and oxidation;however,the majority of T/EBCs exhibit extremely high thermal and ionic conductivities.Here,we obtain a novel rare-earth tantalate with excellent oxygen and thermal insulation via a high-entropy strategy.The high-entropy component(8RE_(1/8))TaO_(4)(RE=rare earth),which is designed by large size disorder and mass disorder,has been reassembled into a stabilized monoclinic structure.(8RE_(1/8))TaO_(4)had 30.0%–31.1%and 59.2%–67.5%lower intrinsic thermal conductivity than single-RE RETaO_(4)and 8(Y_(2)O_(3)–ZrO_(2))8YSZ at 1200℃,respectively,and exhibited lower intrinsic thermal conductivity across the entire temperature range of 100–1200℃.This is the result of strong scattering by the phonon–phonon,grain boundary,domain boundary,dislocation,and vacancy defects.The ionic conductivity of(8RE_(1/8))TaO_(4)is 3712–29,667 times lower than that of 8YSZ at 900℃,benefiting from the strong Ta–O bonding strength,low concentration of mobile oxygen vacancies and severe lattice distortions that impede carrier transport.Moreover,(8RE_(1/8))TaO_(4)had superior high-temperature stability and excellent mechanical properties.Analysis of above results demonstrates that(8RE_(1/8))TaO_(4)is a promising candidate for T/EBCs.
基金This research is supported by a grant from FUTABA DENSHI foundation.
文摘A high-speed and economical optical local access network system is proposed where bi-directional polarization multiplexing is applied to a bi-directional transmission. Experimental results using a prototype system confirm low optical loss and environmental stabilities.
文摘Polycyclic musks are widely used for cos- metics and other personal care and household cleaning products. The occurrence and removal of two representa- tive polycyclic musks, galaxolide （HHCB） and tonalide （AHTN） were investigated in three different processes of two sewage treatment plants （STPs） in Xi＇an, China. The samples were preconcentrated by solid phase extraction procedure and analyzed using a gas chromatography mass spectrometry （GC/MS） by a modified procedure. The HHCB was in the range of 82.8 to 182.5 ng.L1 in the influents and 22.6 to 103.9ng.L-1 in the effluents. The AHTN ranged from 11.0 to 19.3 ng. L-1 in the influents and 2.2 to 8.8 ng. I_~1 in the effluents. The removal efficiency of the two musks varied in the ranges of 43.1%-70.4% for HHCB and 54.2%-84.4% for AHTN. Concentrations of the two musks in aqueous phase of three processes slightly increased along the primary process, and significantly removed during the biologic treatment processes, revealing that the selected musks could be remarkably removed in varied activated sludge processes. Advanced processes of activated sludge did not show a significant superiority on selected musk removal compared to the conventional process. The selected musk removal mainly resulted from the adsorption function of activated sludge. There was no significant change of HHCB/AHTN ratios along the treatment flow, indicating that each sewage treatment structure had a similar removal efficiency for the two musks.
