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Molecular dynamics simulation of arc ablation on Mo or W doped CuCr contact materials 电弧烧蚀掺杂 Mo 或 W 的铜铬接触材料的分子动力学模拟
IF 2.7 4区 材料科学
Materials Letters Pub Date : 2024-11-16 DOI: 10.1016/j.matlet.2024.137734
Dawei Feng , Xinye Fu , Jianing Chen , Liang Zhu , Qi Zhao , Ohi H.M. Ikra Amir
{"title":"Molecular dynamics simulation of arc ablation on Mo or W doped CuCr contact materials","authors":"Dawei Feng ,&nbsp;Xinye Fu ,&nbsp;Jianing Chen ,&nbsp;Liang Zhu ,&nbsp;Qi Zhao ,&nbsp;Ohi H.M. Ikra Amir","doi":"10.1016/j.matlet.2024.137734","DOIUrl":"10.1016/j.matlet.2024.137734","url":null,"abstract":"<div><div>To improve the ablation resistance of the contact material in vacuum circuit breakers (VCBs), molecular dynamics (MD) was used to simulate the microscopic arc ablation process. Reinforced CuCr alloys doped with elements Mo or W were designed using ablative mass as the characteristic parameter for ablation resistance. The results demonstrate that Mo or W doping can improve the ablation resistance of the alloys to some extent, and the doped alloys have better ablation resistance than CuCr<sub>50</sub>. Moreover, Mo or W-doped CuCr alloys with an original Cu content of 70–80 at%, which have less ablative mass than CuCr<sub>50</sub>, are most suitable for improving the contacts’ ablation resistance.</div></div>","PeriodicalId":384,"journal":{"name":"Materials Letters","volume":"379 ","pages":"Article 137734"},"PeriodicalIF":2.7,"publicationDate":"2024-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142656625","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Effects of ultrasonic surface rolling process on the microstructure and wear resistance of 2195 Al-Li alloy processed by laser powder bed fusion 超声波表面滚压工艺对激光粉末床熔融法加工的 2195 Al-Li 合金微观结构和耐磨性的影响
IF 2.7 4区 材料科学
Materials Letters Pub Date : 2024-11-15 DOI: 10.1016/j.matlet.2024.137732
L. Li, W. Zhang, G.Q. Jiang, X.K. Meng, H.M. Zhang, P.F. Li, S. Huang, J.Z. Zhou
{"title":"Effects of ultrasonic surface rolling process on the microstructure and wear resistance of 2195 Al-Li alloy processed by laser powder bed fusion","authors":"L. Li,&nbsp;W. Zhang,&nbsp;G.Q. Jiang,&nbsp;X.K. Meng,&nbsp;H.M. Zhang,&nbsp;P.F. Li,&nbsp;S. Huang,&nbsp;J.Z. Zhou","doi":"10.1016/j.matlet.2024.137732","DOIUrl":"10.1016/j.matlet.2024.137732","url":null,"abstract":"<div><div>This study presents a comparative analysis of the impacts of surface rolling (SR) and ultrasonic surface rolling (USR) techniques on the microstructure and wear resistance of 2195 Al-Li alloy processed by laser powder bed fusion (LPBF). The results show that both SR and USR processes induced grain refinement, increased dislocation density, and converted tensile residual stress into compressive residual stress in the surface layer of the original samples. Compared to the SR process, the USR process exhibited more pronounced strengthening effects due to its unique acoustic effect and dynamic recrystallization mechanism. With the application of USR, the average coefficient of friction for the sample reduced from 0.41 to 0.32. This enhancement in wear resistance can be attributed to the synergistic effects of grain boundary strengthening, dislocation strengthening, and stress strengthening mechanisms.</div></div>","PeriodicalId":384,"journal":{"name":"Materials Letters","volume":"379 ","pages":"Article 137732"},"PeriodicalIF":2.7,"publicationDate":"2024-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142656630","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Effects of short residence time oxidation and pressure-driving carbonization on microstructure and electrochemical performance of pitch-based carbon materials 短停留时间氧化和压力驱动碳化对沥青基碳材料微观结构和电化学性能的影响
IF 2.7 4区 材料科学
Materials Letters Pub Date : 2024-11-14 DOI: 10.1016/j.matlet.2024.137723
Jinru Wu , Tao Yang , Yan Song , Ning Zhao , Xiaodong Tian , Zhanjun Liu
{"title":"Effects of short residence time oxidation and pressure-driving carbonization on microstructure and electrochemical performance of pitch-based carbon materials","authors":"Jinru Wu ,&nbsp;Tao Yang ,&nbsp;Yan Song ,&nbsp;Ning Zhao ,&nbsp;Xiaodong Tian ,&nbsp;Zhanjun Liu","doi":"10.1016/j.matlet.2024.137723","DOIUrl":"10.1016/j.matlet.2024.137723","url":null,"abstract":"<div><div>In this work, coal tar pitch (CTP) is subjected to short residence time air oxidization at varying temperatures, followed by heat treatment under pressure to obtain green cokes with the aim of promoting mesophase development. Then, the green cokes are carbonized to prepare anode materials of lithium-ion batteries (LIBs). The correlation between the microstructure of the carbonized products and the electrochemical performance is investigated. The results reveal that short residence time oxidation facilitates the formation of hydrogen bonds of OH and O of the ether of the pitch. The pressure driving enhances the orientation of the carbon layer of the green cokes, which leads to increased graphene layer size of the subsequent carbonization product. When used as LIB anode materials, the carbonization product displays a high reversible specific capacity of 278 mAh/g at the current density of 2 A/g with stable cycling performance after 1000 cycles. Therefore, appropriate oxidation time and pressure driving at low temperatures are crucial for the growth of the carbon layer during the carbonization.</div></div>","PeriodicalId":384,"journal":{"name":"Materials Letters","volume":"379 ","pages":"Article 137723"},"PeriodicalIF":2.7,"publicationDate":"2024-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142656632","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Enhancing heating performance and temperature uniformity of Cu/Ag mesh transparent heaters by a composite reduced graphene oxide layer 通过复合还原氧化石墨烯层提高铜/银网透明加热器的加热性能和温度均匀性
IF 2.7 4区 材料科学
Materials Letters Pub Date : 2024-11-14 DOI: 10.1016/j.matlet.2024.137724
Yi-lun Wang , Shuang-shuang Li , Bao-jia Li , Nai-fei Ren , Jing Li
{"title":"Enhancing heating performance and temperature uniformity of Cu/Ag mesh transparent heaters by a composite reduced graphene oxide layer","authors":"Yi-lun Wang ,&nbsp;Shuang-shuang Li ,&nbsp;Bao-jia Li ,&nbsp;Nai-fei Ren ,&nbsp;Jing Li","doi":"10.1016/j.matlet.2024.137724","DOIUrl":"10.1016/j.matlet.2024.137724","url":null,"abstract":"<div><div>A novel transparent heater (TH) composed of reduced graphene oxide (RGO)/metal mesh with enhanced heating performance and temperature uniformity, was prepared by thermal reduction in a tube furnace. The synergistic effect between the RGO layer and Cu/Ag mesh effectively improved the electrical properties of the RGO/mesh composite structure. Consequently, the TH demonstrated an efficient electrothermal performance (stable response temperature of 150 °C at 1.8 V) and more uniform surface temperature distribution. This work contributes to the development of composite TH devices for practical applications.</div></div>","PeriodicalId":384,"journal":{"name":"Materials Letters","volume":"379 ","pages":"Article 137724"},"PeriodicalIF":2.7,"publicationDate":"2024-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142656629","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Phospholipid micelles-encapsulated perovskite nanocrystals via dual solvent exchange for human hela cervical cancer cells imaging 通过双溶剂交换将磷脂胶束包裹的过磷酸盐纳米晶体用于人氦宫颈癌细胞成像
IF 2.7 4区 材料科学
Materials Letters Pub Date : 2024-11-14 DOI: 10.1016/j.matlet.2024.137706
Zhiyong Yan , Zixing Zhou , Yong Fan , Rui Gong , Tiandi Chen , Yansen Li , Feng Wang
{"title":"Phospholipid micelles-encapsulated perovskite nanocrystals via dual solvent exchange for human hela cervical cancer cells imaging","authors":"Zhiyong Yan ,&nbsp;Zixing Zhou ,&nbsp;Yong Fan ,&nbsp;Rui Gong ,&nbsp;Tiandi Chen ,&nbsp;Yansen Li ,&nbsp;Feng Wang","doi":"10.1016/j.matlet.2024.137706","DOIUrl":"10.1016/j.matlet.2024.137706","url":null,"abstract":"<div><div>Polyethylene glycol-conjugated phospholipid micelles encapsulated CsPbBr<sub>3</sub> nanocrystals were prepared through dual solvent exchange method. This strategy was applied for the first time to micellar encapsulation of CsPbBr<sub>3</sub> perovskites, circumventing the purification step. The as-prepared sample showed high solubility and maintained high photoluminescence performance even after five days in water. More importantly, the encapsulation of phospholipid micelles toward CsPbBr<sub>3</sub> nanocrystals greatly improved the imaging efficiency of human hela cervical cancer cells (Hela cells).</div></div>","PeriodicalId":384,"journal":{"name":"Materials Letters","volume":"379 ","pages":"Article 137706"},"PeriodicalIF":2.7,"publicationDate":"2024-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142656540","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Embossed sub-micron DLIP and LIPSS textures on polypropylene delay surface colonization of Staphylococcus aureus 聚丙烯上的亚微米 DLIP 和 LIPSS 压纹可延缓金黄色葡萄球菌的表面定植
IF 2.7 4区 材料科学
Materials Letters Pub Date : 2024-11-14 DOI: 10.1016/j.matlet.2024.137722
Frederic Schell , Ralf Helbig , Felix Bouchard , Christoph Zwahr , Lars D. Renner , Andrés F. Lasagni
{"title":"Embossed sub-micron DLIP and LIPSS textures on polypropylene delay surface colonization of Staphylococcus aureus","authors":"Frederic Schell ,&nbsp;Ralf Helbig ,&nbsp;Felix Bouchard ,&nbsp;Christoph Zwahr ,&nbsp;Lars D. Renner ,&nbsp;Andrés F. Lasagni","doi":"10.1016/j.matlet.2024.137722","DOIUrl":"10.1016/j.matlet.2024.137722","url":null,"abstract":"<div><div>The increasing bacterial resistance to antibiotics is prompting research into new approaches to design bacterial repellent surfaces. This work investigated the hot embossing of sub-micron direct laser interference patterning (DLIP) and laser-induced periodic surface structures (LIPSS) textures from stainless steel onto polypropylene samples to achieve bacterial repellent properties. <em>Staphylococcus aureus</em> bacteria were adhered to the textured surfaces, and adhered bacterial counts were compared to untextured polypropylene using colony-forming unit and scanning electron microscopy analysis. Both DLIP and LIPSS textures, with a periodicity of around 700 nm, significantly reduced bacterial colonization compared to untextured samples. These findings highlight the potential of DLIP and LIPSS textures as effective strategies for developing antimicrobial polymer materials.</div></div>","PeriodicalId":384,"journal":{"name":"Materials Letters","volume":"379 ","pages":"Article 137722"},"PeriodicalIF":2.7,"publicationDate":"2024-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142656634","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Combining nanocrystalline NiCo with MOFs-derived carbon fibers skeleton: A dual confinement strategy to efficient electrocatalysts for oxygen evolution reaction 将纳米晶镍钴与源自 MOFs 的碳纤维骨架相结合：实现氧进化反应高效电催化剂的双重限制策略
IF 2.7 4区 材料科学
Materials Letters Pub Date : 2024-11-14 DOI: 10.1016/j.matlet.2024.137727
X.B. Yang , S. Liang , G.Z.H. Wang , B. Zhou , Z.Q. Duan , Z.X. Xie , Y.M. Hu
{"title":"Combining nanocrystalline NiCo with MOFs-derived carbon fibers skeleton: A dual confinement strategy to efficient electrocatalysts for oxygen evolution reaction","authors":"X.B. Yang ,&nbsp;S. Liang ,&nbsp;G.Z.H. Wang ,&nbsp;B. Zhou ,&nbsp;Z.Q. Duan ,&nbsp;Z.X. Xie ,&nbsp;Y.M. Hu","doi":"10.1016/j.matlet.2024.137727","DOIUrl":"10.1016/j.matlet.2024.137727","url":null,"abstract":"<div><div>A dual-confinement strategy was developed to design efficient electrocatalysts for oxygen evolution reaction (OER). NiCo alloy nanoparticles (NPs) were synthesized and embedded in N-doped carbon fibers (NCF) by electrospinning and carbonization techniques. Dual effects of size confinement by the metal–organic frameworks (MOFs) derived carbon skeleton companied with spatial confinement by polyacrylonitrile (PAN) derived carbon fibers (CFs) for the NiCo NPs were executed to improve the electrocatalytic activity. In an alkaline solution, the prepared NiCo-C@CF exhibits significant advantages over the commercial RuO<sub>2</sub> catalyst i.e., a 61 mV lower overpotential of 363 mV under 50 mA cm<sup>−2</sup>, and excellent durability of 87.5 % current density retention after 60 h of continuous OER polarization.</div></div>","PeriodicalId":384,"journal":{"name":"Materials Letters","volume":"379 ","pages":"Article 137727"},"PeriodicalIF":2.7,"publicationDate":"2024-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142656637","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Novel flexible near-infrared laser detectors based on Bi2S3 nanorods 基于 Bi2S3 纳米棒的新型柔性近红外激光探测器
IF 2.7 4区 材料科学
Materials Letters Pub Date : 2024-11-14 DOI: 10.1016/j.matlet.2024.137720
Shumin Xing , Zhichao Liu , Linyu Zhang , Qun Huang , Weigang Chen , Zihan Wu , Yeguo Sun , Junfeng Chao
{"title":"Novel flexible near-infrared laser detectors based on Bi2S3 nanorods","authors":"Shumin Xing ,&nbsp;Zhichao Liu ,&nbsp;Linyu Zhang ,&nbsp;Qun Huang ,&nbsp;Weigang Chen ,&nbsp;Zihan Wu ,&nbsp;Yeguo Sun ,&nbsp;Junfeng Chao","doi":"10.1016/j.matlet.2024.137720","DOIUrl":"10.1016/j.matlet.2024.137720","url":null,"abstract":"<div><div>In recent years, there has been a significant surge in the attention towards flexible, lightweight, and high-performance laser detectors due to their indispensability in meeting the demands of portable and wearable electronics. The synthesis of Bi<sub>2</sub>S<sub>3</sub> nanorods was achieved using a facile polyol refluxing method. Successful configuration of two types of laser detectors based on Bi<sub>2</sub>S<sub>3</sub> nanorods was accomplished using the interdigital electrode/PET substrate. The two laser detectors exhibit a high switch ratio of 7.8 and 556, along with short response/recovery times of 3.6 s/2.3 s and 0.09 s/0.16 s to an 808 nm laser beam, respectively. Our method provides a versatile approach for fabricating high-performance near-infrared laser detectors, showcasing its potential in future flexible and wearable optoelectric devices.</div></div>","PeriodicalId":384,"journal":{"name":"Materials Letters","volume":"379 ","pages":"Article 137720"},"PeriodicalIF":2.7,"publicationDate":"2024-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142656631","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Aqueous phase Localized Surface Plasmon Resonance based Hydrogen sensing using Mixed colloidal Ag and PdAu nanoparticles 使用混合胶体银和钯金纳米粒子进行基于水相局部表面等离子共振的氢传感
IF 2.7 4区 材料科学
Materials Letters Pub Date : 2024-11-13 DOI: 10.1016/j.matlet.2024.137716
Qianxi Chen , Jiaxi Tang , Hong Shao , Changyu Tang , Dongmei Wang , Meikun Fan
{"title":"Aqueous phase Localized Surface Plasmon Resonance based Hydrogen sensing using Mixed colloidal Ag and PdAu nanoparticles","authors":"Qianxi Chen ,&nbsp;Jiaxi Tang ,&nbsp;Hong Shao ,&nbsp;Changyu Tang ,&nbsp;Dongmei Wang ,&nbsp;Meikun Fan","doi":"10.1016/j.matlet.2024.137716","DOIUrl":"10.1016/j.matlet.2024.137716","url":null,"abstract":"<div><div>Hydrogen sensing is critical for its role in clean energy technologies. Herein, a colloidal Ag-PdAu ternary system as an efficient Localized Surface Plasmon Resonance (LSPR)-based sensor is first proposed for H<sub>2</sub> sensing in aqueous environments. Upon exposure to H<sub>2</sub>, the system exhibits a significant LSPR peak shift of 42 nm within just 10 min, with no observable response to N<sub>2</sub> under identical conditions.</div></div>","PeriodicalId":384,"journal":{"name":"Materials Letters","volume":"379 ","pages":"Article 137716"},"PeriodicalIF":2.7,"publicationDate":"2024-11-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142656635","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Microstructure and property evolution of aluminium/potassium titanate whiskers composite during Rheo-casting 铝/钛酸钾晶须复合材料在流变铸造过程中的微观结构和性能演变
IF 2.7 4区 材料科学
Materials Letters Pub Date : 2024-11-12 DOI: 10.1016/j.matlet.2024.137712
Chao Lu , Xumin Hong , Xia Wu , Zhaoting Xiong , Zhanyong Zhao , Chunhua Li , Lei Yang , Zhi Wang , Shukhrat Giyasov , Xiaopeng Lu , Xiaoli Cui , Wenqing Shi , Di Tie
{"title":"Microstructure and property evolution of aluminium/potassium titanate whiskers composite during Rheo-casting","authors":"Chao Lu ,&nbsp;Xumin Hong ,&nbsp;Xia Wu ,&nbsp;Zhaoting Xiong ,&nbsp;Zhanyong Zhao ,&nbsp;Chunhua Li ,&nbsp;Lei Yang ,&nbsp;Zhi Wang ,&nbsp;Shukhrat Giyasov ,&nbsp;Xiaopeng Lu ,&nbsp;Xiaoli Cui ,&nbsp;Wenqing Shi ,&nbsp;Di Tie","doi":"10.1016/j.matlet.2024.137712","DOIUrl":"10.1016/j.matlet.2024.137712","url":null,"abstract":"<div><div>Potassium titanate whiskers (PTWs) have been proved effective in improving aluminium alloys’ mechanical performance whilst reducing their thermal expansivity, which are both crucial to the industrial applications. Here, we fabricate an Al-Zn-Mg-Cu alloy composite reinforced with 10.0 vol% PTW via rheological casting and characterize its microstructure, strength and thermal expansivity evolution at different process parameters. The distribution of PTW in alloy matrix was more homogeneous with growing treating time. After 40 s semi-solid slurring, the final average length of PTW was reduced to 4.1 μm. Meanwhile, the ultimate tensile strength of the composite gained ca. 27.0 % increase, and the thermal expansivity was significantly reduced. Our results demonstrate the feasibility to fabricate high-performance aluminium/PTW composite while reducing the PTW addition via semi-solid rheological processing. Our findings also help better understand the crushing and dispersing behavior of PTW in aluminium matrix during semi-solid solidification.</div></div>","PeriodicalId":384,"journal":{"name":"Materials Letters","volume":"379 ","pages":"Article 137712"},"PeriodicalIF":2.7,"publicationDate":"2024-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142656542","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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