We report scanning tunneling microscopy/spectroscopy（STM/STS） studies on iron-based superconductors of Ba1-xKxFe2As2 and nearly optimally doped Fe（Te,Se）. Mode-like features were observed universally outside the s...We report scanning tunneling microscopy/spectroscopy（STM/STS） studies on iron-based superconductors of Ba1-xKxFe2As2 and nearly optimally doped Fe（Te,Se）. Mode-like features were observed universally outside the superconducting gaps in the tunneling spectra, which are similar to our previous observations in other samples and can be ascribed to the interaction between electrons and spin excitations. Furthermore, an almost linear relationship between the superconducting gaps and the superconducting transition temperatures was noted and should also be taken into account in understanding the mechanism of iron-based superconductors.展开更多
In the future fifth generation(5G) systems,non-orthogonal multiple access(NOMA) is a promising technology that can greatly enhance the network capacity compared to orthogonal multiple access(OMA) .In this paper,we pro...In the future fifth generation(5G) systems,non-orthogonal multiple access(NOMA) is a promising technology that can greatly enhance the network capacity compared to orthogonal multiple access(OMA) .In this paper,we propose a novel random access(RA) and resource allocation scheme for the coexistence of NOMA-based and OMAbased machine-to-machine(M2M) communications,which aims at improving the number of successful data packet transmissions and guaranteeing the quality of service(Qo S) (e.g.,the minimum data rate requirement) for M2 M communications.The algorithm of joint user equipment(UE) paring and power allocation is proposed for the coexisting RA(i.e.,the coexistence of NOMA-based RA and OMA-based RA) .The resource allocation for the coexisting RA is investigated,thus improving the number of successful data packet transmissions by more efficiently using the radio resources.Simulation results demonstrate that the proposed RA and resource allocation scheme outperforms the conventional RA in terms of the number of successful data packet transmissions,thus is a promising technology in future M2 M communications.展开更多
目的对比研究经腹入路和后腹腔入路腹腔镜下肾部分切除术治疗R.E.N.A.L.评分≥7的肾肿瘤的安全性和可行性,评价手术疗效,对比研究其临床应用价值。方法收集2012年1月至2014年3月R.E.N.A.L.评分≥7的肾肿瘤行经腹入路(32例,经腹组)和后...目的对比研究经腹入路和后腹腔入路腹腔镜下肾部分切除术治疗R.E.N.A.L.评分≥7的肾肿瘤的安全性和可行性,评价手术疗效,对比研究其临床应用价值。方法收集2012年1月至2014年3月R.E.N.A.L.评分≥7的肾肿瘤行经腹入路(32例,经腹组)和后腹腔入路(30例,后腹腔组)腹腔镜下肾部分切除术患者临床资料,观察和记录手术相关参数、术后情况,评价手术疗效,记录并发症,所有患者常规随访。比较两种手术方法的手术时间、术中估计失血量、热缺血时间、术中并发症、输血率、恢复进食时间、住院时间、切缘阳性率等。结果经腹组1例患者转为开放手术,后腹腔组3例转为开放手术,其余患者手术均顺利完成,两组手术在年龄、体重指数、ASA评分,Charlson并发症指数、肿瘤最大径、肾肿瘤R.E.N.A.L评分等方面差异无统计学意义(P>0.05));两组在术中估计失血量、热缺血时间、术中并发症、输血率、切缘阳性率等方面差异无统计学意义(P>0.05);经腹组手术时间较后腹腔组时间较短(210.4±59.2 min vs 252±58.3 min),两者差异有统计学意义(P>0.05)。经腹组恢复进食时间(47±10 h vs 23±6 h)和住院时间(8.4±1.9 d vs 6.5±1.6 d)较后腹腔组时间较长(P<0.05)。结论两种手术入路腹腔镜下肾部分切除术均是治疗R.E.N.A.L.评分≥7的一种安全有效的方法。经腹入路操作空间大,容易暴露和手术操作;腹膜后入路术后恢复较快。展开更多
基金supported by the National Basic Research Program of China(Grant Nos.2011CBA00110 and 2012CB821403)the National Natural Science Foundation of China(Grant Nos.11174349 and 11322432)the Strategic Priority Research Program(B)of the Chinese Academy of Sciences(Grant No.XDB07020300)
文摘We report scanning tunneling microscopy/spectroscopy（STM/STS） studies on iron-based superconductors of Ba1-xKxFe2As2 and nearly optimally doped Fe（Te,Se）. Mode-like features were observed universally outside the superconducting gaps in the tunneling spectra, which are similar to our previous observations in other samples and can be ascribed to the interaction between electrons and spin excitations. Furthermore, an almost linear relationship between the superconducting gaps and the superconducting transition temperatures was noted and should also be taken into account in understanding the mechanism of iron-based superconductors.
基金supported by the National Natural Science Foundation of China(61501056)National Science and Technology Major Project of China(No.2016ZX03001012)the Research Fund of ZTE Corporation
文摘In the future fifth generation(5G) systems,non-orthogonal multiple access(NOMA) is a promising technology that can greatly enhance the network capacity compared to orthogonal multiple access(OMA) .In this paper,we propose a novel random access(RA) and resource allocation scheme for the coexistence of NOMA-based and OMAbased machine-to-machine(M2M) communications,which aims at improving the number of successful data packet transmissions and guaranteeing the quality of service(Qo S) (e.g.,the minimum data rate requirement) for M2 M communications.The algorithm of joint user equipment(UE) paring and power allocation is proposed for the coexisting RA(i.e.,the coexistence of NOMA-based RA and OMA-based RA) .The resource allocation for the coexisting RA is investigated,thus improving the number of successful data packet transmissions by more efficiently using the radio resources.Simulation results demonstrate that the proposed RA and resource allocation scheme outperforms the conventional RA in terms of the number of successful data packet transmissions,thus is a promising technology in future M2 M communications.
文摘目的对比研究经腹入路和后腹腔入路腹腔镜下肾部分切除术治疗R.E.N.A.L.评分≥7的肾肿瘤的安全性和可行性,评价手术疗效,对比研究其临床应用价值。方法收集2012年1月至2014年3月R.E.N.A.L.评分≥7的肾肿瘤行经腹入路(32例,经腹组)和后腹腔入路(30例,后腹腔组)腹腔镜下肾部分切除术患者临床资料,观察和记录手术相关参数、术后情况,评价手术疗效,记录并发症,所有患者常规随访。比较两种手术方法的手术时间、术中估计失血量、热缺血时间、术中并发症、输血率、恢复进食时间、住院时间、切缘阳性率等。结果经腹组1例患者转为开放手术,后腹腔组3例转为开放手术,其余患者手术均顺利完成,两组手术在年龄、体重指数、ASA评分,Charlson并发症指数、肿瘤最大径、肾肿瘤R.E.N.A.L评分等方面差异无统计学意义(P>0.05));两组在术中估计失血量、热缺血时间、术中并发症、输血率、切缘阳性率等方面差异无统计学意义(P>0.05);经腹组手术时间较后腹腔组时间较短(210.4±59.2 min vs 252±58.3 min),两者差异有统计学意义(P>0.05)。经腹组恢复进食时间(47±10 h vs 23±6 h)和住院时间(8.4±1.9 d vs 6.5±1.6 d)较后腹腔组时间较长(P<0.05)。结论两种手术入路腹腔镜下肾部分切除术均是治疗R.E.N.A.L.评分≥7的一种安全有效的方法。经腹入路操作空间大,容易暴露和手术操作;腹膜后入路术后恢复较快。
