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Machine learning assisted prediction of charge transfer properties in organic solar cells by using morphology-related descriptors

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Nano Research 2023年第2期16卷 3588-3596页

作者： Lulu Fu Haixia Hu Qiang Zhu Lifeng Zheng yuming gu Yaping Wen Haibo Ma Hang Yin Jing Ma Key Laboratory of Mesoscopic Chemistry of Ministry of Education School of Chemistry and Chemical EngineeringNanjing UniversityNanjing 210023China School of Physics Shandong UniversityJinan 250100China Jiangsu Key Laboratory of Advanced Organic Materials School of Chemistry and Chemical EngineeringNanjing UniversityNanjing 210023China

Charge transfer and transport properties are crucial in the photophysical process of exciton dissociation and recombination at the donor/acceptor(D/A)***,machine learning(ML)is applied to predict the charge transfer state energy(ECT)and identify the relationship between ECT and intermolecular packing structures sampled from molecular dynamics(MD)simulations on fullerene-and non-fullerene-based systems with different D/A ratios(RDA),oligomer sizes,and D/A *** gradient boosting regression(GBR)exhibits satisfactory performance(r=0.96)in predicting ECT withπ-packing related features,aggregation extent,backbone of donor,and energy levels of frontier molecular *** charge transport property affected byπ-packing with different RDA has also been investigated by space-charge-limited current(SCLC)measurement and MD *** SCLC results indicate an improved hole transport of non-fullerene system PM6/Y6 with RDA of 1.2:1 in comparison with the 1:1 counterpart,which is mainly attributed to the bridge role of donor unit in *** reduced energetic disorder is correlated with the improved miscibility of polymer with RDA increased from 1:1 to 1.2:*** morphology-related features are also applicable to other complicated systems,such as perovskite solar cells,to bridge the gap between device performance and microscopic packing structures.

关键词： charge transfer charge transport packing modes machine learning organic solar cells

Review of Budd-Chiari Syndrome

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Journal of Interventional Medicine 2020年第2期3卷 65-76页

作者： Maoheng Zu Hao Xu Qingqiao Zhang yuming gu Ning Wei Wei Xu Yanfeng Cui Hongtao Liu Department of Interventional Radiology The Affiliated Hospital of XuZhou Medical UniversityProvince JiangsuPR China

This study aims to report the Budd-Chiari syndrome clinical research status and progress that has occurred in over nearly 30 years in China, and emphasize the value of imaging in facilitating the diagnosis of Budd-Chiari syndrome based on more than 2500 cases. Findings on ultrasonography, computed tomography, magnetic resonance imaging, and digital subtraction angiography images are used to propose new Budd-Chiari syndrome types and subtypes. The new subtype classification presented here has important value for guiding interventional *** study also proposes a new concept of anatomical and functional obstruction of hepatic vein that stresses the compensatory value of accessory hepatic vein and azygos vein and describes the risk of manipulation of the communication branch of inferior vena cava obstruction in interventional therapy.

关键词： Budd-chiari syndrome Etiology Imaging diagnosis Type and subtype

TACE联合酪氨酸激酶抑制剂在肝癌术后复发患者中的疗效与安全性分析

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徐州医科大学学报 2024年第5期44卷 338-343页

作者：李园园祖亚南李蕾殷雪瑞邵俞菲肖晋昌顾玉明徐州医科大学研究生院江苏徐州221004 徐州医科大学附属医院肿瘤科江苏徐州221002 徐州医科大学附属医院介入科

目的比较经导管动脉化疗栓塞术(TACE)联合酪氨酸激酶抑制剂(TKIs)与TACE单独应用在肝癌根治性切除术后复发患者中的疗效与安全性。方法对2018年4月—2023年8月于徐州医科大学附属医院就诊、行肝癌根治性切除手术患者的临床资料进行回顾... 详细信息

目的比较经导管动脉化疗栓塞术(TACE)联合酪氨酸激酶抑制剂(TKIs)与TACE单独应用在肝癌根治性切除术后复发患者中的疗效与安全性。方法对2018年4月—2023年8月于徐州医科大学附属医院就诊、行肝癌根治性切除手术患者的临床资料进行回顾性收集并分析。将患者分为复发组(94例)与未复发组(90例),将复发组中接受TACE联合酪氨酸激酶抑制剂的患者设为TACE+TKIs治疗组(68例),单独接受TACE治疗的患者设为TACE治疗组(26例)。对治疗后患者的近期疗效、无进展生存期(PFS)及安全性进行随访。结果本研究共纳入184例患者,其中复发组94例,未复发组90例;TACE+TKIs组68例,TACE组26例。TACE+TKIs组客观缓解率(ORR)高于TACE组,差异有统计学意义(54.1%vs 34.6%,P<0.01);TACE+TKIs组疾病控制率(DCR)高于TACE组,差异有统计学意义(82.3%vs 57.7%,P<0.001);TACE+TKIs组中位PFS为29.9个月,TACE组中位PFS为7.94个月;TACE+TKIs组与TACE组均未发生4-5级不良事件,所发生的不良事件均是可控的。结论与TACE单独应用比较,TACE联合TKIs可以改善术后复发患者的PFS和DCR,安全性尚可,有望使肝癌术后复发患者获益。

关键词：肝癌酪氨酸激酶抑制剂经导管动脉化疗栓塞复发靶向药物

First results of negative ion extraction with Cs for CRAFT prototype negative beam source

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Plasma Science and Technology 2021年第1期23卷 3-7页

作者： Yahong XIE Chundong HU Jianglong WEI Yongjian XU Caichao JIANG yuming gu Yuanzhe ZHAO Lizhen LIANG Yuanlai XIE Institute of Plasma Physics Chinese Academy of SciencesHefei 230031People’s Republic of China

In order to understand the physics and pre-study the engineering issues for radio frequency(RF)negative beam source,a prototype source with a single driver and three-electrode accelerator was ***,the beam source was tested on the RF source test facility with RF plasma generation,negative ion production and extraction.A magnetic filter system and a Cs injection system were employed to enhance the negative ion *** a result,a long pulse of 105 s negative ion beam with current density of 153 A m-2 was repeatedly extracted *** source pressure is 0.6 Pa and the ratio of co-extracted electron and negative ion current is *** details of design and experimental results of beam source were shown in this letter.

关键词： neutral beam injector RF ion source negative ion source long pulse Cs feeding

Achievement of 1000 s plasma generation of RF source for neutral beam injector

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Plasma Science and Technology 2019年第2期21卷 5-8页

作者： Chundong HU Yahong XIE Yongjian XU Caichao JIANG Jianglong WEI yuming gu Qinglong CUI Lizhen LIANG Shiyong CHEN Yuanlai XIE Institute of Plasma Physics Chinese Academy of Sciences

A radio frequency(RF) ion source was developed for neutral beam injector in Institute of Plasma Physics, Chinese Academy of Sciences(ASIPP). A cylindrical driver based RF plasma source was tested and optimized for long pulse operation. Recently, the plasma source achieved 1000 s stable plasma discharge with RF power of 35 k W and source pressure of 0.7 Pa for the first *** heat loading on each of driver components such as the Faraday shield(FS), RF coil and expansion chamber was measured by the water flow calorimeter system. The experiment results showed that FS is the component with highest heat loading and the heat loading on FS was about 65.8% of total heat loading on source. The details of the long pulse operation of RF plasma source are presented in this paper.

关键词： neutral beam injector RF ion source water flow calorimeter long pulse

基于全永磁微波离子源钛自成靶的D-D中子源设计研究

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真空与低温 2024年第3期30卷 336-342页

作者：李旭廖晨伦谢亚红曹小岗洪兵梁立振顾玉明胡纯栋孟献才合肥综合性国家科学中心能源研究院安徽省能源实验室合肥230031 东华理工大学核科学与工程学院南昌330032 中国科学院合肥物质科学研究院等离子体物理研究所合肥230031

介绍了一种基于全永磁微波离子源钛自成靶技术的紧凑型氘氘(D-D)中子源,其设计中子产额为1×10^(9)s^(-1)。该D-D中子源已经进行了800 h以上的测试,系统可重复稳定运行。早期测试结果显示,系统打火频率高、中子产额低,长时间放电后反向... 详细信息

介绍了一种基于全永磁微波离子源钛自成靶技术的紧凑型氘氘(D-D)中子源,其设计中子产额为1×10^(9)s^(-1)。该D-D中子源已经进行了800 h以上的测试,系统可重复稳定运行。早期测试结果显示,系统打火频率高、中子产额低,长时间放电后反向电子会烧蚀Al2O3陶瓷窗,导致微波耦合困难,氘等离子体无法点亮。通过在等离子体腔室中添加氮化硼(BN)保护片以及在钛靶与高压电极之间增加电子抑制电阻,有效抑制了Al2O3陶瓷窗的损伤。通过对等离子体电极孔径的优化和降低腔室压力,降低了打火频率,提高了中子的产额。系统优化后,氘离子能量为70 keV、束流强度为5 mA时,中子产额达到了2.0×10^(8)s^(-1)。在氘离子能量为97 keV、束流强度为6.6 mA时,系统中子产额达到5.2×10^(8)s^(-1)。

关键词：微波离子源氘氘核反应钛自成靶中子源

Design of the Prototype Negative Ion Source for Neutral Beam Injector at ASIPP

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Plasma Science and Technology 2016年第9期18卷 954-959页

作者： WEI Jianglong XIE Yahong LIANG Lizhen gu yuming YI Wei LI Jun HU Chundong XIE Yuanlai JIANG Caichao TAO Ling SHENG Peng XU Yongjian Institute of Plasma Physics Chinese Academy of Sciences Hefei 230031 China

In order to support the design, manufacture and commissioning of the negative- ion-based neutral beam injection （NBI） system for the Chinese Fusion Engineering Test Reactor （CFETR）, the Hefei utility negative ion test equipment with RF source （HUNTER） was proposed at ASIPP. A prototype negative ion source will be developed at first. The main bodies of plasma source and accelerator of the prototype negative ion source are similar to that of the ion source for EAST-NBI. But instead of the filament-arc driver, an RF driver is adopted for the prototype negative ion source to fulfill the requirement of long pulse operation. A cesium seeding system and a magnetic filter are added for enhancing the negative ion density near the plasma grid and minimizing co-extracted electrons. Besides, an ITER-like extraction system is applied inside the accelerator, where the negative ion beam is extracted and accelerated up to 50 kV.

关键词： negative ion source neutral beam injection CFETR

The application and efficacy of stent place for Budd-Chiari syndrome

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Journal of Interventional Medicine 2018年第3期1卷 170-175页

作者： Maoheng Zu Hao Xu yuming gu Qingqiao Zhang Ning Wei Wei Xu Yanfeng Cui The Affiliated Hospital of Xuzhou Medical University

Objective To evaluate the application value and efficacy on stent place for Budd-Chiari syndrome(BCS). Methods From January 1990 to May 2017, 2228 patients with BCS were admitted to our institution. The mean age was 43.3 years. Stents were placed in inferior vena cava(IVC), hepatic vein(HV), or both after balloon dilation. During follow-up period, the patency of stent was evaluated by ultrasound regularly and the clinic sign was surveyed by letter, telephone or clinic visit. The restenosis of stent were treated with balloon dilatation and thrombolysis to restore the its function. Results IVC type was diagnosed in 1492 cases, HV type in 510 cases, and mixed type in 226 cases. Eighteen patients aborted treatment because of economic reasons, advanced liver cancer, severe scoliosis, or both bilateral iliac veins and total IVC occlusion. Among the other 2210 cases who underwent endovascular therapy, stents were implanted into IVC in 339 cases, HV in 97 cases, mixed type in 64 cases. The rate of restenosis in IVC stent was 11.50%(39/339). After repeat angioplasty, the long-term patency rate reached to 98.12%. The incidence of HV occlusion caused by IVC stent was 12.09%(n = 41). Restenosis occurred in 47 cases(48.45%) after HV stent placement. However, the 5-year patency rate was 91.75%(89/97) after repeat dilatation and stent re-implantation. The incidence of IVC obstruction caused by HV was 3.33%(3 cases). Conclusion IVC stent placement appears to be an effective treatment for the cases of IVC segmental occlusion, and at the same time, the stent has the dual role of compression and fixation of thrombus and support of lumen. The HV and accessory hepatic vein obstruction could happen when the IVC stent crossed these veins ostium. The incidence of the stent restenosis in the HV was higher than that in the IVC.

关键词： angioplasty Budd-Chiari syndrome restenosis stent

The Inherent Law of the Unpredictability of Financial Asset Price Fluctuations: Multistability and Chaos

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Journal of Systems Science & Complexity 2024年第2期37卷 776-804页

作者： gu Enguo Huanghe University of Science and Technology Zhengzhou 450006China

This paper aims at understanding the price dynamics generated by the interaction of traders relying on heterogeneous expectations in an asset pricing *** the present work the authors analyze a financial market populated by five types of boundedly rational speculators-two types of fundamentalists,two types of chartists and trend followers which submit buying/selling orders according to different trading *** authors formulate a stock market model represented as a 2 dimensional piecewise linear discontinuous *** proposed contribution to the existing financial literature is two ***,the authors perform study of the model involving a 2 dimensional piecewise linear discontinuous map through a combination of qualitative and quantitative *** authors focus on the existence conditions of chaos and the multi-stability regions in parameter *** border collision bifurcation curves and basins of multi-attractors are also *** authors find that chaos or quasi-period exists only in the case of fixed point being a saddle(regular or flip)and that the coexistence of multiple attractors may exist when the fixed point is an attractor,but it is common for spiral and flip fixed points.

关键词： BCB curve chaos financial market heterogeneous agents multiple attractors piecewise linear discontinuous map