The gamma-graphyne nanoribbons(γ-GYNRs) incorporating diamond-shaped segment(DSSs) with excellent thermoelectric properties are systematically investigated by combining nonequilibrium Green’s functions with adaptive...The gamma-graphyne nanoribbons(γ-GYNRs) incorporating diamond-shaped segment(DSSs) with excellent thermoelectric properties are systematically investigated by combining nonequilibrium Green’s functions with adaptive genetic algorithm. Our calculations show that the adaptive genetic algorithm is efficient and accurate in the process of identifying structures with excellent thermoelectric performance. In multiple rounds, an average of 476 candidates(only 2.88% of all16512 candidate structures) are calculated to obtain the structures with extremely high thermoelectric conversion efficiency.The room temperature thermoelectric figure of merit(ZT) of the optimal γ-GYNR incorporating DSSs is 1.622, which is about 5.4 times higher than that of pristine γ-GYNR(length 23.693 nm and width 2.660 nm). The significant improvement of thermoelectric performance of the optimal γ-GYNR is mainly attributed to the maximum balance of inhibition of thermal conductance(proactive effect) and reduction of thermal power factor(side effect). Moreover, through exploration of the main variables affecting the genetic algorithm, it is revealed that the efficiency of the genetic algorithm can be improved by optimizing the initial population gene pool, selecting a higher individual retention rate and a lower mutation rate. The results presented in this paper validate the effectiveness of genetic algorithm in accelerating the exploration of γ-GYNRs with high thermoelectric conversion efficiency, and could provide a new development solution for carbon-based thermoelectric materials.展开更多
目的:观察开瘀通窍活络汤加减联合西药治疗脑出血恢复期的临床疗效。方法:将66例脑出血恢复期患者采用随机数字表法随机分为对照组和治疗组各33例,对照组给予神经内科一般治疗和护理,治疗组在对照组治疗基础上加用开瘀通窍活络汤(黄芪...目的:观察开瘀通窍活络汤加减联合西药治疗脑出血恢复期的临床疗效。方法:将66例脑出血恢复期患者采用随机数字表法随机分为对照组和治疗组各33例,对照组给予神经内科一般治疗和护理,治疗组在对照组治疗基础上加用开瘀通窍活络汤(黄芪、桃仁、红花、赤芍、三七、石菖蒲、远志、牛膝、川芎、麝香)加减治疗,1 d 1剂,水煎400 mL,取200 mL后纳入麝香,早晚分服。两组均以2周为1个疗程,共治疗2个疗程。结果:治疗组显效18例,有效13例,无效2例,有效率为93.93%;对照组显效10例,有效14例,无效9例,有效率为72.72%。两组疗效对比,差异有统计学意义(P<0.05)。治疗前,两组NIHSS评分、ADL评分、GQOLI-74评分无显著差异;治疗后,治疗组NIHSS评分明显低于对照组(P<0.01);治疗组ADL评分、GQOLI-74评分明显高于对照组(P<0.01)。两组并发症发生率差异有统计学意义(P<0.05)。结论:开瘀通窍活络汤加减联合西医常规疗法治疗脑出血恢复期可有效改善神经功能缺损、提高日常生活活动能力和生活质量,减少并发症。展开更多
基金Project supported by the National Natural Science Foundation of China(Grant Nos.11974300,11974299,12074150)the Natural Science Foundation of Hunan Province,China(Grant No.2021JJ30645)+3 种基金Scientific Research Fund of Hunan Provincial Education Department(Grant Nos.20K127,20A503,and 20B582)Program for Changjiang Scholars and Innovative Research Team in University(Grant No.IRT13093)the Hunan Provincial Innovation Foundation for Postgraduate(Grant No.CX20220544)Youth Science and Technology Talent Project of Hunan Province,China(Grant No.2022RC1197)。
文摘The gamma-graphyne nanoribbons(γ-GYNRs) incorporating diamond-shaped segment(DSSs) with excellent thermoelectric properties are systematically investigated by combining nonequilibrium Green’s functions with adaptive genetic algorithm. Our calculations show that the adaptive genetic algorithm is efficient and accurate in the process of identifying structures with excellent thermoelectric performance. In multiple rounds, an average of 476 candidates(only 2.88% of all16512 candidate structures) are calculated to obtain the structures with extremely high thermoelectric conversion efficiency.The room temperature thermoelectric figure of merit(ZT) of the optimal γ-GYNR incorporating DSSs is 1.622, which is about 5.4 times higher than that of pristine γ-GYNR(length 23.693 nm and width 2.660 nm). The significant improvement of thermoelectric performance of the optimal γ-GYNR is mainly attributed to the maximum balance of inhibition of thermal conductance(proactive effect) and reduction of thermal power factor(side effect). Moreover, through exploration of the main variables affecting the genetic algorithm, it is revealed that the efficiency of the genetic algorithm can be improved by optimizing the initial population gene pool, selecting a higher individual retention rate and a lower mutation rate. The results presented in this paper validate the effectiveness of genetic algorithm in accelerating the exploration of γ-GYNRs with high thermoelectric conversion efficiency, and could provide a new development solution for carbon-based thermoelectric materials.
文摘目的:观察开瘀通窍活络汤加减联合西药治疗脑出血恢复期的临床疗效。方法:将66例脑出血恢复期患者采用随机数字表法随机分为对照组和治疗组各33例,对照组给予神经内科一般治疗和护理,治疗组在对照组治疗基础上加用开瘀通窍活络汤(黄芪、桃仁、红花、赤芍、三七、石菖蒲、远志、牛膝、川芎、麝香)加减治疗,1 d 1剂,水煎400 mL,取200 mL后纳入麝香,早晚分服。两组均以2周为1个疗程,共治疗2个疗程。结果:治疗组显效18例,有效13例,无效2例,有效率为93.93%;对照组显效10例,有效14例,无效9例,有效率为72.72%。两组疗效对比,差异有统计学意义(P<0.05)。治疗前,两组NIHSS评分、ADL评分、GQOLI-74评分无显著差异;治疗后,治疗组NIHSS评分明显低于对照组(P<0.01);治疗组ADL评分、GQOLI-74评分明显高于对照组(P<0.01)。两组并发症发生率差异有统计学意义(P<0.05)。结论:开瘀通窍活络汤加减联合西医常规疗法治疗脑出血恢复期可有效改善神经功能缺损、提高日常生活活动能力和生活质量,减少并发症。
