Using porous carbon hosts in cathodes of Li-S cells can disperse S actives and offset their poor electrical conductivity.However,such reservoirs would in turn absorb excess electrolyte solvents to S-unfilled regions,c...Using porous carbon hosts in cathodes of Li-S cells can disperse S actives and offset their poor electrical conductivity.However,such reservoirs would in turn absorb excess electrolyte solvents to S-unfilled regions,causing the electrolyte overconsumption,specific energy decline,and even safety hazards for battery devices.To build better cathodes,we propose to substitute carbons by In-doped SnO_(2)(ITO)nano ceramics that own three-in-one functionalities:1)using conductive ITO enables minimizing the total carbon content to an extremely low mass ratio(~3%)in cathodes,elevating the electrode tap density and averting the electrolyte overuse;2)polar ITO nanoclusters can serve as robust anchors toward Li polysulfide(LiPS)by electrostatic adsorption or chemical bond interactions;3)they offer catalysis centers for liquid–solid phase conversions of S-based actives.Also,such ceramics are intrinsically nonflammable,preventing S cathodes away from thermal runaway or explosion.These merits entail our configured cathodes with high tap density(1.54 g cm^(−3)),less electrolyte usage,good security for flame retardance,and decent Li-storage behaviors.With lean and LiNO_(3)-free electrolyte,packed full cells exhibit excellent redox kinetics,suppressed LiPS shuttling,and excellent cyclability.This may trigger great research enthusiasm in rational design of low-carbon and safer S cathodes.展开更多
The rotation-minimizing frame is the main research object for a spatial curve. Although the mathematical description is not complicated, it is not easy to directly make an exact minimizing-rotation frame for the Euler...The rotation-minimizing frame is the main research object for a spatial curve. Although the mathematical description is not complicated, it is not easy to directly make an exact minimizing-rotation frame for the Euler-Rodrigues frame. The condition for the non-normalized Euler-Rodrigues frame of the Pythagorean-Hodograph curve to become the rotation-minimizing frame is given in this article, which is an ordinary differential equation with rational form, the analytical solution that does not always exist. To avoid calculating the solution of ordinary differential equations, a global optimization algorithm for the conditions is proposed, that has a weight function in the objective function. The quintic Pythagorean-Hodograph curve is analyzed concretely with the method, and its objective function and constraint conditions of optimization are clarified. The example is analyzed by using this method with different weight functions and contrasting that approach with its exact value.展开更多
目的:探讨免疫球蛋白重链(IgH)基因重排在多发性骨髓瘤(MM)自体造血干细胞移植(auto-HSCT)后微小残留病监测中的价值。方法:收集2018年-2022年于武汉市第一医院血液内科接受auto-HSCT的26例MM患者的临床资料,通过多重PCR联合毛细管电泳...目的:探讨免疫球蛋白重链(IgH)基因重排在多发性骨髓瘤(MM)自体造血干细胞移植(auto-HSCT)后微小残留病监测中的价值。方法:收集2018年-2022年于武汉市第一医院血液内科接受auto-HSCT的26例MM患者的临床资料,通过多重PCR联合毛细管电泳片段分析法检测IgH重排来评价微小残留病(MRD),对疾病的转归进行相关统计学分析。结果:全部26例MM患者中,男性18例,女性8例,中位年龄59(41-70)岁,移植后中位随访时间33(7-52)个月。与骨髓IgH重排阴性组(17例)比较,移植前骨髓IgH重排阳性(9例)患者移植后3个月达到CR和sCR疗效的比例更低(1/9 vs 14/17),移植后缓解持续的时间(DOR)更短(10.78±4.35 vs 15.88±5.22个月),两组DOR差异有统计学意义(P<0.05);与外周血干细胞采集物IgH重排阴性组(21例)比较,外周血干细胞采集物IgH重排阳性(5例)患者移植后3个月达到CR和sCR的比例更低(0/5 vs 15/21),移植后缓解持续的时间(DOR)更短(9.60±4.83 vs 15.19±5.11个月),两组DOR差异有统计学意义(P<0.05)。在随访期内,移植前骨髓IgH重排阳性的患者有5例(5/9)死亡,IgH重排阴性患者均存活;外周血干细胞采集物IgH重排阳性患者有4例(4/5)死亡,IgH重排阴性患者有1例死亡(1/21)。无论是骨髓还是外周血干细胞采集物标本,IgH重排阳性患者移植后生存时间较IgH重排阴性患者更短(P<0.05)。Logistic回归分析结果显示,性别、疾病分期、初诊时骨髓涂片浆细胞比例、干细胞动员方案、移植前疗效评价(≥CR和<CR)、CD34+细胞计数对移植前骨髓及干细胞采集物IgH重排均无影响(P>0.05)。结论:通过检测接受auto-HSCT的MM患者IgH重排,可以进一步评价MRD的深度,对疾病的疗效及预后判断有一定的指导意义。展开更多
基金support by the National Natural Science Foundation of China(51802269,21773138)Fundamental Research Funds for the Central Universities(XDJK2019AA002)+1 种基金the Venture&Innovation Support Program for Chongqing Overseas Returnees(cx2018027)the innovation platform for academicians of Hainan province.
文摘Using porous carbon hosts in cathodes of Li-S cells can disperse S actives and offset their poor electrical conductivity.However,such reservoirs would in turn absorb excess electrolyte solvents to S-unfilled regions,causing the electrolyte overconsumption,specific energy decline,and even safety hazards for battery devices.To build better cathodes,we propose to substitute carbons by In-doped SnO_(2)(ITO)nano ceramics that own three-in-one functionalities:1)using conductive ITO enables minimizing the total carbon content to an extremely low mass ratio(~3%)in cathodes,elevating the electrode tap density and averting the electrolyte overuse;2)polar ITO nanoclusters can serve as robust anchors toward Li polysulfide(LiPS)by electrostatic adsorption or chemical bond interactions;3)they offer catalysis centers for liquid–solid phase conversions of S-based actives.Also,such ceramics are intrinsically nonflammable,preventing S cathodes away from thermal runaway or explosion.These merits entail our configured cathodes with high tap density(1.54 g cm^(−3)),less electrolyte usage,good security for flame retardance,and decent Li-storage behaviors.With lean and LiNO_(3)-free electrolyte,packed full cells exhibit excellent redox kinetics,suppressed LiPS shuttling,and excellent cyclability.This may trigger great research enthusiasm in rational design of low-carbon and safer S cathodes.
文摘The rotation-minimizing frame is the main research object for a spatial curve. Although the mathematical description is not complicated, it is not easy to directly make an exact minimizing-rotation frame for the Euler-Rodrigues frame. The condition for the non-normalized Euler-Rodrigues frame of the Pythagorean-Hodograph curve to become the rotation-minimizing frame is given in this article, which is an ordinary differential equation with rational form, the analytical solution that does not always exist. To avoid calculating the solution of ordinary differential equations, a global optimization algorithm for the conditions is proposed, that has a weight function in the objective function. The quintic Pythagorean-Hodograph curve is analyzed concretely with the method, and its objective function and constraint conditions of optimization are clarified. The example is analyzed by using this method with different weight functions and contrasting that approach with its exact value.
文摘目的:探讨免疫球蛋白重链(IgH)基因重排在多发性骨髓瘤(MM)自体造血干细胞移植(auto-HSCT)后微小残留病监测中的价值。方法:收集2018年-2022年于武汉市第一医院血液内科接受auto-HSCT的26例MM患者的临床资料,通过多重PCR联合毛细管电泳片段分析法检测IgH重排来评价微小残留病(MRD),对疾病的转归进行相关统计学分析。结果:全部26例MM患者中,男性18例,女性8例,中位年龄59(41-70)岁,移植后中位随访时间33(7-52)个月。与骨髓IgH重排阴性组(17例)比较,移植前骨髓IgH重排阳性(9例)患者移植后3个月达到CR和sCR疗效的比例更低(1/9 vs 14/17),移植后缓解持续的时间(DOR)更短(10.78±4.35 vs 15.88±5.22个月),两组DOR差异有统计学意义(P<0.05);与外周血干细胞采集物IgH重排阴性组(21例)比较,外周血干细胞采集物IgH重排阳性(5例)患者移植后3个月达到CR和sCR的比例更低(0/5 vs 15/21),移植后缓解持续的时间(DOR)更短(9.60±4.83 vs 15.19±5.11个月),两组DOR差异有统计学意义(P<0.05)。在随访期内,移植前骨髓IgH重排阳性的患者有5例(5/9)死亡,IgH重排阴性患者均存活;外周血干细胞采集物IgH重排阳性患者有4例(4/5)死亡,IgH重排阴性患者有1例死亡(1/21)。无论是骨髓还是外周血干细胞采集物标本,IgH重排阳性患者移植后生存时间较IgH重排阴性患者更短(P<0.05)。Logistic回归分析结果显示,性别、疾病分期、初诊时骨髓涂片浆细胞比例、干细胞动员方案、移植前疗效评价(≥CR和<CR)、CD34+细胞计数对移植前骨髓及干细胞采集物IgH重排均无影响(P>0.05)。结论:通过检测接受auto-HSCT的MM患者IgH重排,可以进一步评价MRD的深度,对疾病的疗效及预后判断有一定的指导意义。
