作者测定30例尿培养阴性的正常人和20例尿路感染(UTI)患者尿内氧压(PUO_2)。结果显示,正常人 PUO_2为4.81±1.03kPa,而 UTI 患者 PUO_2为1.601±1.18kPa。如以(?)—2S为正常值下限,正常人28例(93%)PUO_2高于2.763kPa,2例(7%)低...作者测定30例尿培养阴性的正常人和20例尿路感染(UTI)患者尿内氧压(PUO_2)。结果显示,正常人 PUO_2为4.81±1.03kPa,而 UTI 患者 PUO_2为1.601±1.18kPa。如以(?)—2S为正常值下限,正常人28例(93%)PUO_2高于2.763kPa,2例(7%)低于上述值,UTI 患者中仅2例(10%)高于此值,18例(90%)2.763kPa 表明 PUO_2诊断 UTI 的阳性率为90%,假阳性、假阴性率分别7%、10%。展开更多
The electronic structure and optical properties of plutonium dioxide were calculated using the generalized gradient approximation with a Hubbard parameter U （GGA ＋ U） for considering the strong coulomb correlation ...The electronic structure and optical properties of plutonium dioxide were calculated using the generalized gradient approximation with a Hubbard parameter U （GGA ＋ U） for considering the strong coulomb correlation between localized Pu of electrons based on the first-principles density functional theory. The calculated results show that PuO2 is a semiconductor material with the band gap of 1.8 eV, which is in good agreement with the corresponding experimental data. Furthermore, the dielectric function, reflectivity, refractive index, and extinction coefficient were calculated and analyzed using the Kramers-Kronig relationship for PuO2. The calculated results were compared with the experimental data from the published literature.展开更多
文摘作者测定30例尿培养阴性的正常人和20例尿路感染(UTI)患者尿内氧压(PUO_2)。结果显示,正常人 PUO_2为4.81±1.03kPa,而 UTI 患者 PUO_2为1.601±1.18kPa。如以(?)—2S为正常值下限,正常人28例(93%)PUO_2高于2.763kPa,2例(7%)低于上述值,UTI 患者中仅2例(10%)高于此值,18例(90%)2.763kPa 表明 PUO_2诊断 UTI 的阳性率为90%,假阳性、假阴性率分别7%、10%。
文摘根据文献数据，拟合得到了水在二氧化钚表面的脱附活化能：0～0．5层为200．0kJ／mol，0．5～1层为135．0kJ／mol，1～2层为47．6kJ／mol，2～3层为43．8 kJ／mol，〉3层为41．1kJ/mol。利用这些参数采用动力学蒙特卡罗方法（kinetic Monte Carlo，KMC）定量研究了水在二氧化钚表面的吸附和脱附行为，计算得到几种常见的吸附曲线：吸附动力学曲线、热脱附谱、吸附等温线和吸附等压线，模拟结果和文献数据吻合较好，误差小于20％。
基金financially supported by the National Natural Science Foundation of China(No.91026016)the National Defense Science and Technology Key Laboratory Foundation(No.9140C660503120C66244)the Foundations for Cultivating Academic Leaders of Sichuan Province(No.SXS201301).
文摘The electronic structure and optical properties of plutonium dioxide were calculated using the generalized gradient approximation with a Hubbard parameter U （GGA ＋ U） for considering the strong coulomb correlation between localized Pu of electrons based on the first-principles density functional theory. The calculated results show that PuO2 is a semiconductor material with the band gap of 1.8 eV, which is in good agreement with the corresponding experimental data. Furthermore, the dielectric function, reflectivity, refractive index, and extinction coefficient were calculated and analyzed using the Kramers-Kronig relationship for PuO2. The calculated results were compared with the experimental data from the published literature.
