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Electric field and charge doping induced superconducting transition in 2D freestanding perovskite barium bismuthate

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Science China(Physics,Mechanics & Astronomy) 2023年第7期66卷 102-111页

作者： Yaning Cui tianhao su Lei Qiao Zongquan Gu Gianni Profeta Alessandra Continenza Wei Ren Physics Department Materials Genome InstituteInternational Center for Quantum and Molecular StructuresShanghai UniversityShanghai 200444China Shanghai Key Laboratory of High Temperature superconductors Shanghai UniversityShanghai 200444China Zhejiang Laboratory Hangzhou 311100China School of Microelectronics Fudan UniversityShanghai 200433China Department of Physical and Chemical Sciences Universitàdegli Studi dell'AquilaCoppito(L'Aquila)67100Italy Consiglio Nazionale delle Ricerche CNR-SPIN Coppito(L'Aquila)67100Italy

We present an ab-initio study of monolayer BaBiO_(3) focused on how to harness the insulator-metal transition through suppression of the charge density wave(CDW)phase in this *** the determination of the most stable structure for the freestanding monolayer,we investigate the effects of an applied electric field and of charge doping on the electronic properties of the *** results show that external electric fields of the order of 0.1-0.3 V/A are able to stabilize the metallic phase,destroy the CDW phase and,in addition,lead to a metallic metastable *** this same footing,we show that hole doping could also suppress the CDW phase and drive the system toward a metallic phase with large electron-phonon *** this end,we also study the dependence of the electron-phonon coupling on hole-doping concentration and show that this could drive the onset of ***,low-dimensional BaBiO3 is an extremely flexible material with electronic properties that could be tuned using different and possibly combined external tools such as electric fields and charge doping,paving the way to achieve effective control on the transition from the CDW,to the metallic and then superconducting phase.

关键词： charge wave density phase transition superconductivity 2D material

Properties of Flare Events on M Stars from LAMOST Spectral survey Based on Kepler and TESS Light Curves

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Research in Astronomy and Astrophysics 2023年第5期23卷 1-18页

作者： Gang Meng Li-Yun Zhang tianhao su Zilu Yang Xianming LHan Prabhakar Misra Liu Long Qingfeng Pi Zhongzhong Zhu Linyan Jiang College of Physics&Guizhou Provincial Key Laboratory of Public Big Data Guizhou UniversityGuiyang 550025China Department of Astronomy Beijing Normal UniversityBeijing 100875China Dept.of Physics and Astronomy Butler UniversityIndianapolisIN 46208USA Department of Physics&Astronomy Howard University WashingtonDC 20059USA College of Medicine Guizhou University of Traditional Chinese MedicineGuiyang 550025China Guiyang Institute of Information Science and Technology Guiyang 550025China

A catalog of M stars has been published from the Large Sky Area Multi-Object Fiber Spectroscopic Telescope data release 7(LAMOST DR7).We cross-matched the LAMOST M catalog with Kepler,Kepler 2(K2)and Transiting Exoplanet survey Satellite(TESS)*** obtained the light curves from the Kepler and TESS *** detected 20,047 flare events from 4053 M stars and calculated their durations,amplitudes,and *** analyzed the distribution of the flare durations and *** distributions of flare duration for Kepler,K2 and TESS peak are at 3–3.5 hr,4–6 hr and 1–1.5 hr,*** may be the result of the different cadences for the three data *** highest regions of the flare energies of Kepler,K2 and TESS are 32–32.5,32–32.5 and31–31.5 erg in Log format,respectively.A linear relationship between flare duration and energy emerges from our *** ratio of flare duration to total observational time is approximately 0.2%–0.3%for the Kepler,K2 and TESS *** occurrence rate of a star with a flare event increases from the M0 to M4 *** also determined the spatial distribution of the flare rate of M stars in the Milky *** seems that the flare rate decreases as the vertical height *** power index of the flare energies is in the region of 1.53–2.32,which is similar to previous result for solar type star(2.0).Further,we examined the relationship between the flare amplitude and chromospheric *** flare activity increases rapidly with the increase in the HαEW at the lower values(less approximately 2?)and it increases slowly at the higher values.

关键词： stars activity-stars flare-stars low-mass

Continuous edge chromatic numbers of abelian group actions

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Science China Mathematics 2025年

作者： su Gao Ruijun Wang tianhao Wang School of Mathematical Sciences and Laboratory of Pure Mathematics and Combinatorics Nankai University

We prove that for any generating set S of Z~n, the continuous edge chromatic number χ′c（G） of the Schreier graph of the Bernoulli shift action G = F(S, 2Z~n) is χ′（G） + 1 = |S| + 1. In particular, for the stan...

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A case of agnogenic intrahepatic arterioportal fistula complicated by gastric ulcer bleeding and progressive portal thrombosis

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Portal Hypertension & Cirrhosis 2022年第1期1卷 82-85页

作者： Siwei Yang tianhao su Zhiyuan Zhang Jianan Yu Long Jin Department of Interventional Radiology Beijing Friendship HospitalCapital Medical UniversityBeijingChina

Arterioportal fistulas(APFs)are defined as vascular communications between the systemic arteries and portal *** are classified as congenital or acquired,large or small,intrahepatic or extrahepatic,and traumatic or *** consistent abnormal connection may result in severe presinusoidal portal hypertension,leading to gastrointestinal bleeding(GIB),ascites,elevated liver function enzymes,heart failure,diarrhea,and even pancreatitis or hematobilia in some unusual ***,less than half reported cases have GIB,predominately caused by variceal *** ulcer bleeding has rarely been reported in the setting of ***,we describe a case in which intrahepatic APF manifested as gastric ulcer bleeding,progressive portal thrombosis,and massive ascites,with these symptoms successfully relieved by endovascular treatment.

关键词： arterial bleeding arterial embolization arterioportal fistula portal hypertension portal thrombosis

血管腔内治疗创伤性后交通动脉假性动脉瘤伴海绵窦瘘

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介入放射学杂志 2020年第10期29卷 1036-1039页

作者：苏天昊金龙首都医科大学附属北京友谊医院放射介入科北京100050

目的探讨创伤性后交通动脉假性动脉瘤伴海绵窦瘘的血管造影表现及血管腔内介入治疗的可行性。方法回顾1例创伤性后交通动脉假性动脉瘤伴海绵窦瘘患者的临床诊疗过程。结合Pubmed数据库文献,分析该病临床、病理特点及治疗策略。结果创伤... 详细信息

目的探讨创伤性后交通动脉假性动脉瘤伴海绵窦瘘的血管造影表现及血管腔内介入治疗的可行性。方法回顾1例创伤性后交通动脉假性动脉瘤伴海绵窦瘘患者的临床诊疗过程。结合Pubmed数据库文献,分析该病临床、病理特点及治疗策略。结果创伤性后交通动脉假性动脉瘤破裂危害极大,可引起蛛网膜下腔出血和海绵窦瘘,治疗难度增加。血管腔内介入栓塞治疗后交通动脉假性动脉瘤是首要和推荐方法,同时可达到海绵窦瘘微创治疗的目的。结论脑血管造影可完善创伤性颅内假性动脉瘤诊断,随后的血管腔内介入栓塞可为该病提供治疗机会。

关键词：创伤性颅内假性动脉瘤后交通动脉颈动脉海绵窦瘘血管腔内治疗

儿童肝移植术后门静脉狭窄的血管腔内治疗进展

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中国介入影像与治疗学 2018年第8期15卷 506-508页

作者：张致远金龙苏天昊王砼首都医科大学附属北京友谊医院放射介入科北京100050

门静脉狭窄是儿童肝移植术后常见的严重血管并发症之一。血管腔内治疗具有创伤微小、疗效确切的优势,是肝移植术后门静脉狭窄的首选治疗方法。本文对近年来儿童肝移植术后门静脉狭窄血管腔内治疗进展进行综述。

关键词：儿童肝移植手术后并发症门静脉狭窄血管成形术

血管腔内介入治疗儿童肝移植术后门静脉狭窄的长期疗效分析

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介入放射学杂志 2024年第4期33卷 409-413页

作者：尹超金龙张致远苏天昊陈广首都医科大学附属北京友谊医院放射介入科北京100050

目的探讨儿童肝移植术后门静脉狭窄(portal vein stenosis,PVS)血管腔内介入治疗的长期临床效果。方法对本中心2013年6月至2017年12月396例接受肝移植术后出现PVS的25例患者进行回顾性分析研究。所有PVS患者均经门脉造影证实,并行经皮... 详细信息

目的探讨儿童肝移植术后门静脉狭窄(portal vein stenosis,PVS)血管腔内介入治疗的长期临床效果。方法对本中心2013年6月至2017年12月396例接受肝移植术后出现PVS的25例患者进行回顾性分析研究。所有PVS患者均经门脉造影证实,并行经皮血管球囊扩张成形术和(或)经皮血管支架植入术治疗。研究分析PVS患者血管腔内介入治疗的远期效果。结果25例患者一共接受了47次干预治疗(其中39次血管腔内球囊成形和8次支架植入),个体治愈率为88.0%(22/25)。所有患者无一例出现血管腔内介入治疗相关并发症。结论经过长期随访证实,小儿肝移植术后PVS血管腔内干预治疗的长期结果安全有效。

关键词：儿童肝移植门静脉狭窄介入性

肺结节胸腔镜切除术前微弹簧圈定位相关并发症及其影响因素

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中国介入影像与治疗学 2020年第11期17卷 641-645页

作者：王砼苏天昊曹沙沙韩燕京张致远金龙首都医科大学附属北京友谊医院放射介入科北京100050

目的观察电视辅助肺结节胸腔镜切除术(VATS)术前定位微弹簧圈相关并发症,并分析其影响因素。方法回顾性分析160例肺结节患者(160个结节),均于VATS切除结节前行CT引导下微弹簧圈定位,统计定位术后并发症,分析其影响因素。结果160例结肺... 详细信息

目的观察电视辅助肺结节胸腔镜切除术(VATS)术前定位微弹簧圈相关并发症,并分析其影响因素。方法回顾性分析160例肺结节患者(160个结节),均于VATS切除结节前行CT引导下微弹簧圈定位,统计定位术后并发症,分析其影响因素。结果160例结肺节均以微弹簧圈成功定位,术中26例出现气胸,37例发生肺内出血,未见空气栓塞。所有患者于次日接受VATS,术中均未发现微弹簧圈移位。单因素分析结果显示,患者体位(P=0.04)、结节距胸膜距离(P=0.03)及穿刺次数(P<0.01)与微弹簧圈定位术后发生气胸相关,结节距胸膜距离(P=0.03)与微弹簧圈定位术后发生肺内出血相关。多因素分析结果显示,患者体位、结节距胸膜距离及穿刺次数是微弹簧圈定位术后发生气胸的独立危险因素(P均<0.05),结节距胸膜距离则是肺内出血的独立危险因素(P=0.01)。结论肺结节VATS术前微弹簧圈定位可出现气胸和肺内出血,前者与结节距胸膜距离、患者体位及穿刺次数相关,后者仅与结节距胸膜距离相关。

关键词：肺肿瘤气胸体层摄影术,X线计算机弹簧圈胸腔镜

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支架成形术治疗横窦狭窄继发搏动性耳鸣1例

介入放射学杂志 2017年第8期26卷 765-766页

作者：韩燕京金龙苏天昊陈广尉建安肖国文首都医科大学附属北京友谊医院放射介入科 100050

横窦狭窄已经被证实与部分搏动性耳鸣、颅内压增高症以及颅内静脉窦血栓的发生和发展密切相关。1997年，Mathis等首先报道1例应用支架治疗源于静脉窦狭窄的耳鸣患者，此后国内外相关研究较少。现报道应用支架成形术成功治疗横窦狭窄继... 详细信息

横窦狭窄已经被证实与部分搏动性耳鸣、颅内压增高症以及颅内静脉窦血栓的发生和发展密切相关。1997年，Mathis等首先报道1例应用支架治疗源于静脉窦狭窄的耳鸣患者，此后国内外相关研究较少。现报道应用支架成形术成功治疗横窦狭窄继发颅内高压及搏动性耳鸣患者1例．

关键词：搏动性耳鸣横窦狭窄颅高压支架成形术