In this paper,by utilizing the Marcinkiewicz-Zygmund inequality and Rosenthal-type inequality of negatively superadditive dependent(NSD)random arrays and truncated method,we investigate the complete f-moment convergen...In this paper,by utilizing the Marcinkiewicz-Zygmund inequality and Rosenthal-type inequality of negatively superadditive dependent(NSD)random arrays and truncated method,we investigate the complete f-moment convergence of NSD random variables.We establish and improve a general result on the complete f-moment convergence for Sung’s type randomly weighted sums of NSD random variables under some general assumptions.As an application,we show the complete consistency for the randomly weighted estimator in a nonparametric regression model based on NSD errors.展开更多
Buried Si<sub>3</sub>N<sub>4</sub> layer is formed by hitrogen ion implanted silicoh with high energy （400Key） and high dose (1×10<sup>18</sup>/cm<sup>2</sup>). T...Buried Si<sub>3</sub>N<sub>4</sub> layer is formed by hitrogen ion implanted silicoh with high energy （400Key） and high dose (1×10<sup>18</sup>/cm<sup>2</sup>). The unimplanted single crystal zone is used as seed crystal. Seed inducing recrystallization is carried out by autoscanning Nd: YAG CW laser annealing. We got a large area SOI structure sample.展开更多
As ion implanted damage of silicon was removed by Rapid ThermalAnnealing(RTA)using Model KST-1 RTA appakatus.Removal ofdamage and dopant redistribution were investigated by RutherfordBackscattering Spectra(RBS)and Ext...As ion implanted damage of silicon was removed by Rapid ThermalAnnealing(RTA)using Model KST-1 RTA appakatus.Removal ofdamage and dopant redistribution were investigated by RutherfordBackscattering Spectra(RBS)and Extended Resistance.Sheet resistanceand carrier Hall mobility was mesaured by Van der Panw method.展开更多
In this paper, damages and annealing effects of X,Y and Z cut LiNbO-3 implanted by 350keV high energy Ti (1.5 x 10<sup>17</sup> / cm<sup>2</sup>) are studied. The surface damages of X,Y cut pla...In this paper, damages and annealing effects of X,Y and Z cut LiNbO-3 implanted by 350keV high energy Ti (1.5 x 10<sup>17</sup> / cm<sup>2</sup>) are studied. The surface damages of X,Y cut plates are nearly amorphous, but the surface damage of Z cut does not reach saturation. Radiation damage is mainly due to Nb moving atoms and Ti atoms occupy the interstitial sites. By annealing the sample at 1000℃, most damage is removed from the boundary between implanted layer and LiNbO<sub>3</sub> base to surface.展开更多
In this study,Mg-based composites,by the addition of ZnO,Ca_(2)ZnSi_(2)O_(7),Ca_(2)MgSi_(2)O_(7),and CaSiO_(3)as bioactive agents,were fabricated using friction stir processing.The microstructure and in vitro assessme...In this study,Mg-based composites,by the addition of ZnO,Ca_(2)ZnSi_(2)O_(7),Ca_(2)MgSi_(2)O_(7),and CaSiO_(3)as bioactive agents,were fabricated using friction stir processing.The microstructure and in vitro assessment of bioactivity,biodegradation rate,and corrosion behavior of the resultant composites were investigated in simulated body fluid(SBF).The results showed that during the immersion of composites in SBF for 28 d,due to the release of Ca^(2+)and PO_(4)^(3-)ions,hydroxyapatite(HA)crystals with cauliflower shaped morphology were deposited on the surface of composites,confirming good bioactivity of composites.In addition,due to the uniform distribution of bioceramic powders throughout Mg matrix,grain refinement of the Mg matrix,and uniform redistribution of secondary phase particles,the polarization resistance increased,and the biodegradation rate of composites significantly reduced compared to monolithic Mg matrix.The polarization corrosion resistance of Mg-ZnO increased from 0.216 to 2.499 kΩ/cm^(2)compared to monolithic Mg alloy.Additionally,Mg-ZnO composite with the weight loss of 0.0217 g after 28 d immersion showed lower weight loss compared to other samples with increasing immersion time.Moreover,Mg-ZnO composite with the biodegradation rate of 37.71 mm/a exhibited lower biodegradation rate compared to other samples with increasing immersion time.展开更多
The response wavelength of the blocked-impurity-band(BIB)structured infrared detector can reach 200µm,which is the most important very long wavelength infrared astronomical detector.The ion implantation method gr...The response wavelength of the blocked-impurity-band(BIB)structured infrared detector can reach 200µm,which is the most important very long wavelength infrared astronomical detector.The ion implantation method greatly simplifies the fabrication process of the device,but it is easy to cause lattice damage,introduce crystalline defects,and lead to the increase of the dark current of detectors.Herein,the boron-doped germanium ion implantation process was studied,and the involved lattice damage mechanism was discussed.Experimental conditions involved using 80 keV energy for boron ion implantation,with doses ranging from 1×10^(13)cm^(-2)to 3×10^(15)cm^(-2).After implantation,thermal annealing at 450℃was implemented to optimize dopant activation and mitigate the effects of ion implantation.Various sophisticated characterization techniques,including X-ray dif⁃fraction(XRD),Raman spectroscopy,X-ray photoelectron spectroscopy(XPS),and secondary ion mass spec⁃trometry(SIMS)were used to clarify lattice damage.At lower doses,no notable structural alterations were ob⁃served.However,as the dosage increased,specific micro distortions became apparent,which could be attributed to point defects and residual strain.The created lattice damage was recovered by thermal treatment,however,an irreversible strain induced by implantation still existed at heavily dosed samples.展开更多
目的:构建A型主动脉夹层患者围手术期数智平台管理方案并评价其应用效果,以期改善患者结局。方法:课题小组根据文献检索及专家咨询结果,形成A型主动脉夹层患者围手术期数智平台管理方案。采用便利抽样法,选取2022年1月至2024年1月于浙...目的:构建A型主动脉夹层患者围手术期数智平台管理方案并评价其应用效果,以期改善患者结局。方法:课题小组根据文献检索及专家咨询结果,形成A型主动脉夹层患者围手术期数智平台管理方案。采用便利抽样法,选取2022年1月至2024年1月于浙江省某三级甲等医院行A型主动脉夹层手术患者为研究对象。干预组(n=56)于2023年2月至2024年1月采用数智平台方案管理,对照组(n=53)于2022年1月—11月采用常规方案管理。比较两组患者术前准备时间、术后机械通气时长及ICU停留时长,比较两组手术中巡回护士外出次数,并采用有效性、满意度、易用性(Usefulness,Satisfaction and Ease of Use,USE)问卷评估平台可用性。结果 :与对照组相比,干预组患者术前准备时间、术后机械通气时长及ICU停留时长均缩短,手术中巡回护士外出次数减少,差异有统计意义(P<0.001),医护人员关于平台使用的USE问卷得分为(6.34±0.29)分。结论:A型主动脉夹层患者围手术期数智平台管理方案有利于缩短该类患者术前准备时间、术后机械通气时长及ICU停留时长,减少手术中巡回护士外出次数,且该平台可用性良好。展开更多
基金supported by the National Social Science Fundation(Grant No.21BTJ040)the Project of Outstanding Young People in University of Anhui Province(Grant Nos.2023AH020037,SLXY2024A001).
文摘In this paper,by utilizing the Marcinkiewicz-Zygmund inequality and Rosenthal-type inequality of negatively superadditive dependent(NSD)random arrays and truncated method,we investigate the complete f-moment convergence of NSD random variables.We establish and improve a general result on the complete f-moment convergence for Sung’s type randomly weighted sums of NSD random variables under some general assumptions.As an application,we show the complete consistency for the randomly weighted estimator in a nonparametric regression model based on NSD errors.
基金The project supported by National Natural Science Foundation of Chinapartly by USTC Foundation
文摘Buried Si<sub>3</sub>N<sub>4</sub> layer is formed by hitrogen ion implanted silicoh with high energy （400Key） and high dose (1×10<sup>18</sup>/cm<sup>2</sup>). The unimplanted single crystal zone is used as seed crystal. Seed inducing recrystallization is carried out by autoscanning Nd: YAG CW laser annealing. We got a large area SOI structure sample.
基金The Project Supported by Nationnl Natural Science Foundation of China
文摘As ion implanted damage of silicon was removed by Rapid ThermalAnnealing(RTA)using Model KST-1 RTA appakatus.Removal ofdamage and dopant redistribution were investigated by RutherfordBackscattering Spectra(RBS)and Extended Resistance.Sheet resistanceand carrier Hall mobility was mesaured by Van der Panw method.
文摘In this paper, damages and annealing effects of X,Y and Z cut LiNbO-3 implanted by 350keV high energy Ti (1.5 x 10<sup>17</sup> / cm<sup>2</sup>) are studied. The surface damages of X,Y cut plates are nearly amorphous, but the surface damage of Z cut does not reach saturation. Radiation damage is mainly due to Nb moving atoms and Ti atoms occupy the interstitial sites. By annealing the sample at 1000℃, most damage is removed from the boundary between implanted layer and LiNbO<sub>3</sub> base to surface.
文摘In this study,Mg-based composites,by the addition of ZnO,Ca_(2)ZnSi_(2)O_(7),Ca_(2)MgSi_(2)O_(7),and CaSiO_(3)as bioactive agents,were fabricated using friction stir processing.The microstructure and in vitro assessment of bioactivity,biodegradation rate,and corrosion behavior of the resultant composites were investigated in simulated body fluid(SBF).The results showed that during the immersion of composites in SBF for 28 d,due to the release of Ca^(2+)and PO_(4)^(3-)ions,hydroxyapatite(HA)crystals with cauliflower shaped morphology were deposited on the surface of composites,confirming good bioactivity of composites.In addition,due to the uniform distribution of bioceramic powders throughout Mg matrix,grain refinement of the Mg matrix,and uniform redistribution of secondary phase particles,the polarization resistance increased,and the biodegradation rate of composites significantly reduced compared to monolithic Mg matrix.The polarization corrosion resistance of Mg-ZnO increased from 0.216 to 2.499 kΩ/cm^(2)compared to monolithic Mg alloy.Additionally,Mg-ZnO composite with the weight loss of 0.0217 g after 28 d immersion showed lower weight loss compared to other samples with increasing immersion time.Moreover,Mg-ZnO composite with the biodegradation rate of 37.71 mm/a exhibited lower biodegradation rate compared to other samples with increasing immersion time.
基金Supported by National Key R&D Program of China(2023YFA1608701)National Natural Science Foundation of China(62274168,11933006,U2141240)Hangzhou Leading Innovation and Entrepreneurship Team(TD2020002)。
文摘The response wavelength of the blocked-impurity-band(BIB)structured infrared detector can reach 200µm,which is the most important very long wavelength infrared astronomical detector.The ion implantation method greatly simplifies the fabrication process of the device,but it is easy to cause lattice damage,introduce crystalline defects,and lead to the increase of the dark current of detectors.Herein,the boron-doped germanium ion implantation process was studied,and the involved lattice damage mechanism was discussed.Experimental conditions involved using 80 keV energy for boron ion implantation,with doses ranging from 1×10^(13)cm^(-2)to 3×10^(15)cm^(-2).After implantation,thermal annealing at 450℃was implemented to optimize dopant activation and mitigate the effects of ion implantation.Various sophisticated characterization techniques,including X-ray dif⁃fraction(XRD),Raman spectroscopy,X-ray photoelectron spectroscopy(XPS),and secondary ion mass spec⁃trometry(SIMS)were used to clarify lattice damage.At lower doses,no notable structural alterations were ob⁃served.However,as the dosage increased,specific micro distortions became apparent,which could be attributed to point defects and residual strain.The created lattice damage was recovered by thermal treatment,however,an irreversible strain induced by implantation still existed at heavily dosed samples.
文摘目的:构建A型主动脉夹层患者围手术期数智平台管理方案并评价其应用效果,以期改善患者结局。方法:课题小组根据文献检索及专家咨询结果,形成A型主动脉夹层患者围手术期数智平台管理方案。采用便利抽样法,选取2022年1月至2024年1月于浙江省某三级甲等医院行A型主动脉夹层手术患者为研究对象。干预组(n=56)于2023年2月至2024年1月采用数智平台方案管理,对照组(n=53)于2022年1月—11月采用常规方案管理。比较两组患者术前准备时间、术后机械通气时长及ICU停留时长,比较两组手术中巡回护士外出次数,并采用有效性、满意度、易用性(Usefulness,Satisfaction and Ease of Use,USE)问卷评估平台可用性。结果 :与对照组相比,干预组患者术前准备时间、术后机械通气时长及ICU停留时长均缩短,手术中巡回护士外出次数减少,差异有统计意义(P<0.001),医护人员关于平台使用的USE问卷得分为(6.34±0.29)分。结论:A型主动脉夹层患者围手术期数智平台管理方案有利于缩短该类患者术前准备时间、术后机械通气时长及ICU停留时长,减少手术中巡回护士外出次数,且该平台可用性良好。
