目的:以随机化、控制性、盲法设计分析一种新型光动力疗法治疗牙周疾病病人时存在的潜行性的性别差异。方法:本研究经伦理委员会同意后,入选45例病人(每位病人至少有4个以上≥5mm的牙周袋并分布在两个以上区域内)。所有病人在接受基础...目的:以随机化、控制性、盲法设计分析一种新型光动力疗法治疗牙周疾病病人时存在的潜行性的性别差异。方法:本研究经伦理委员会同意后,入选45例病人(每位病人至少有4个以上≥5mm的牙周袋并分布在两个以上区域内)。所有病人在接受基础检查、龈下刮治和根面平整(subgingival scaling and rootplanning)治疗后,随机分为3组,其中A组在SRP之后接受一次PERIOWAVE光动力治疗,B组在SRP后接受一次PERIOWAVE治疗以及在6周后再一次接受激光治疗,而C组仅接受SRP治疗。在6周以及12周来访中检查牙周袋深度、附着丧失,以Mann-Whitney秩和检验分析疗效的性别差异。结果:SRP组、A组均为8位男性7位女性,B组为7位男性8位女性。在6周、12周时,各组CAL均增加>1.1mm,6周时CAL增加无明显差异,然而12周时B组男性CAL平均增加2.06mm,明显高于女性组(1.61mm)(P=0.031),与女性组相比,接受两次激光治疗的男性CAL增加27.4%。结论:在本研究条件下,牙周袋深度≥5mm的男性牙周炎病人在接受两次光动力治疗后CAL增加超过女性病人27.4%。展开更多
We synthesized the rare-earth activated Ro.94_xEuo.06ZnxVO4 （R： Gd and Y; 0〈_x〈_0.08） phosphors with a spherical mor- phology and a smooth surface by the ultrasonic spray pyrolysis. The annealed Ro.94_xEuo.06ZnxV...We synthesized the rare-earth activated Ro.94_xEuo.06ZnxVO4 （R： Gd and Y; 0〈_x〈_0.08） phosphors with a spherical mor- phology and a smooth surface by the ultrasonic spray pyrolysis. The annealed Ro.94_xEuo.06ZnxVO4 crystallized in the tetragonal zircon type structure, belonging to the space group of I41/amd. The incorporation of a small amount of Zn to Ro.94Euo.06VO4 improved the emission characteristics. The emission intensities of the Gdo.88EUo.06Zno.06VO4 and Yo.9Euo.06Zno.04VO4 phosphors at 619 nm were 72% and 2 1% stronger than those of the Gdo,94Euo.06VO4 and Yo.94Euo.06VO4 phosphors, respectively. We demonstrated that the addi- tion of Zn to Ro.94Euo.06VO4 was quite effective for improving the photoluminescent properties.展开更多
The Eliashberg theory of superconductivity accounts for the fundamental physics of conventional superconductors,including the retardation of the interaction and the Coulomb pseudopotential,to predict the critical temp...The Eliashberg theory of superconductivity accounts for the fundamental physics of conventional superconductors,including the retardation of the interaction and the Coulomb pseudopotential,to predict the critical temperature T_(c).McMillan,Allen,and Dynes derived approximate closed-form expressions for the critical temperature within this theory,which depends on the electron–phonon spectral functionα^(2)F(ω).Here we show that modern machine-learning techniques can substantially improve these formulae,accounting for more general shapes of theα^(2)F function.Using symbolic regression and the SISSO framework,together with a database of artificially generatedα^(2)F functions and numerical solutions of the Eliashberg equations,we derive a formula for T_(c)that performs as well as Allen–Dynes for low-T_(c)superconductors and substantially better for higher-T_(c)ones.This corrects the systematic underestimation of Tc while reproducing the physical constraints originally outlined by Allen and Dynes.This equation should replace the Allen–Dynes formula for the prediction of higher-temperature superconductors.展开更多
The authors regret that one of the coauthors was inadvertently omitted in the previous paper. E. Varene was a member of the Institut fur Festk6rperphysik at the Technische Universitat Berlin and contributed to the res...The authors regret that one of the coauthors was inadvertently omitted in the previous paper. E. Varene was a member of the Institut fur Festk6rperphysik at the Technische Universitat Berlin and contributed to the results on cross-phase modulation.展开更多
文摘目的:以随机化、控制性、盲法设计分析一种新型光动力疗法治疗牙周疾病病人时存在的潜行性的性别差异。方法:本研究经伦理委员会同意后,入选45例病人(每位病人至少有4个以上≥5mm的牙周袋并分布在两个以上区域内)。所有病人在接受基础检查、龈下刮治和根面平整(subgingival scaling and rootplanning)治疗后,随机分为3组,其中A组在SRP之后接受一次PERIOWAVE光动力治疗,B组在SRP后接受一次PERIOWAVE治疗以及在6周后再一次接受激光治疗,而C组仅接受SRP治疗。在6周以及12周来访中检查牙周袋深度、附着丧失,以Mann-Whitney秩和检验分析疗效的性别差异。结果:SRP组、A组均为8位男性7位女性,B组为7位男性8位女性。在6周、12周时,各组CAL均增加>1.1mm,6周时CAL增加无明显差异,然而12周时B组男性CAL平均增加2.06mm,明显高于女性组(1.61mm)(P=0.031),与女性组相比,接受两次激光治疗的男性CAL增加27.4%。结论:在本研究条件下,牙周袋深度≥5mm的男性牙周炎病人在接受两次光动力治疗后CAL增加超过女性病人27.4%。
文摘We synthesized the rare-earth activated Ro.94_xEuo.06ZnxVO4 （R： Gd and Y; 0〈_x〈_0.08） phosphors with a spherical mor- phology and a smooth surface by the ultrasonic spray pyrolysis. The annealed Ro.94_xEuo.06ZnxVO4 crystallized in the tetragonal zircon type structure, belonging to the space group of I41/amd. The incorporation of a small amount of Zn to Ro.94Euo.06VO4 improved the emission characteristics. The emission intensities of the Gdo.88EUo.06Zno.06VO4 and Yo.9Euo.06Zno.04VO4 phosphors at 619 nm were 72% and 2 1% stronger than those of the Gdo,94Euo.06VO4 and Yo.94Euo.06VO4 phosphors, respectively. We demonstrated that the addi- tion of Zn to Ro.94Euo.06VO4 was quite effective for improving the photoluminescent properties.
基金The work presented here was performed under the auspice of Basic Energy Sciences,United States Department of Energy,contract number DE-SC0020385.
文摘The Eliashberg theory of superconductivity accounts for the fundamental physics of conventional superconductors,including the retardation of the interaction and the Coulomb pseudopotential,to predict the critical temperature T_(c).McMillan,Allen,and Dynes derived approximate closed-form expressions for the critical temperature within this theory,which depends on the electron–phonon spectral functionα^(2)F(ω).Here we show that modern machine-learning techniques can substantially improve these formulae,accounting for more general shapes of theα^(2)F function.Using symbolic regression and the SISSO framework,together with a database of artificially generatedα^(2)F functions and numerical solutions of the Eliashberg equations,we derive a formula for T_(c)that performs as well as Allen–Dynes for low-T_(c)superconductors and substantially better for higher-T_(c)ones.This corrects the systematic underestimation of Tc while reproducing the physical constraints originally outlined by Allen and Dynes.This equation should replace the Allen–Dynes formula for the prediction of higher-temperature superconductors.
文摘The authors regret that one of the coauthors was inadvertently omitted in the previous paper. E. Varene was a member of the Institut fur Festk6rperphysik at the Technische Universitat Berlin and contributed to the results on cross-phase modulation.
