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Recent progress and strategies of cathodes toward polysulfides shuttle restriction for lithium-sulfur batteries

Rare Metals 2024年第9期43卷 4132-4161页

作者： Xing-You Rao Shuang-Fei Xiang Jian zhou Zhen Zhang Xiang-Yu Xu Yuan-Yuan Xu Xin-Chi zhou Zheng-Dao Pan Su-chong Tan Shi-Xing Dong zhou-Lu Wang Yu-Tong Wu Yun-Lei zhou Xiang Liu Yi Zhang Shan Jiang School of Energy Sciences and Engineering Nanjing Tech University School of Materials Science and Engineering and Institute of Smart Fiber Materials Zhejiang Sci-Tech University JiangSu Sailboat Petrochemical Co. Ltd Hangzhou Institute of Technology Xidian University

Lithium-sulfur batteries(LSBs) have already developed into one of the most promising new-generation high-energy density electrochemical energy storage systems with outstanding features including high-energy density, low cost, and environmental friendliness. However, the development and commercialization path of LSBs still presents significant limitations and challenges, particularly the notorious shuttle effect triggered by soluble longchain lithium polysulfides(LiPSs), which inevitably leads to low utilization of cathode active sulfur and high battery capacity degradation, short cycle life, etc. Substantial research efforts have been conducted to develop various sulfur host materials capable of effectively restricting the shuttle effect. This review firstly introduces the fundamental electrochemical aspects of LSBs, followed by a comprehensive analysis of the mechanism underlying the shuttle effect in Li–S batteries and its profound influence on various battery components as well as the overall battery performance. Subsequently, recent advances and strategies are systematically reviewed, including physical confinement, chemisorption, and catalytic conversion of sulfur hosts for restricting LiPSs shuttle effects. The interplay mechanisms of sulfur hosts and LiPSs are discussed in detail and the structural advantages of different host materials are highlighted. Furthermore, key insights for the rational design of advanced host materials for LSBs are provided, and the upcoming challenges and the prospects for sulfur host materials in lithium-sulfur batteries are also explored.

关键词： Host Lithium-sulfur batteries Polysulfides Shuttle effect

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Toward tunable shape memory effect of NiTi alloy by grain size engineering:A phase field study

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Journal of Materials Science & Technology 2024年第1期168卷 276-289页

作者： Bo Xu chong Wang Qingyuan Wang Failure Mechanics and Engineering Disaster Prevention Key Laboratory of Sichuan ProvinceSichuan UniversityChengdu 610065China Department of Mechanical Science and Engineering College of Architecture and EnvironmentSichuan UniversityChengdu 610065China Key Laboratory of Deep Underground Science and Engineering (Sichuan University)Ministry of EducationChengdu 610065China

The inelastic deformations of shape memory alloys(SMAs)always show poor controllability due to the avalanche-like martensite transformation,and the effective control for the deformation of precision de-vices has been not yet *** this work,the phase field method was used to investigate the shape memory effects(SMEs)of NiTi SMAs undergoing grain size(GS)engineering,to obtain tunable one-way and stress-assisted two-way SMEs(OWSME and SATWSME).The OWSME and SATWSME of the systems with various gradient-nanograin structures and bimodal grain structure,as well as that with geometric gradients were *** simulated results indicate that due to the GS dependences of martensite transformation and reorientation,the occurrence and expansion of martensite reorientation,martensite transformation and its reverse can be efficaciously controlled via the GS *** combining the GS engineering and geometric gradient design,since the effects of GS and stress gradient can be su-perimposed or competing,and the responses of martensite reorientation,martensite transformation and its reverse to this are different,the OWSME and SATWSME of the geometrically graded systems with various nanograin structures can exhibit different improvements in *** short,the reorienta-tion hardening modulus during OWSME is increased and the transformation temperature window during SATWSME is widened by GS engineering,indicating the improved controllability of *** optimal GS engineering schemes revealed in this work provide the basic reference and guidance for designing tun-able SMEs and producing NiTi-based driving devices catering to desired functional performance in various engineering fields.

关键词： Phase field NiTi Shape memory effect Grain size engineering Geometric gradient

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Lesson Learned from COVID-19 Retrospective Study: An Entropy-Based Clinical-Interpretable Scorecard for Mortality Risk Control at ICU Admission

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Tsinghua Science and Technology 2024年第1期29卷 34-45页

作者： chong Yao chonghui Huangqi Anpeng Huang Laboratory of Network Information Security Beihang UniversityBeijing 100191China Andrew and Erna Viterbi School of Engineering University of Southern CaliforniaLos AnglesCA 90089USA Beijing Goodwill Information and Technology Co. Ltd.and Mobile Health LaboratoryPeking UniversityBeijing 100871China

With severe acute respiratory syndrome coronavirus 2 spreading globally and causing 2019 coronavirus disease(COVID-19),a challenge that we unprepared for was about how to optimally plan and distribute limited top-medical resources for patients in need of urgent *** address this challenge,physicians desperately needed a scientific tool to methodically differentiate between cases with varying *** this study,the unique data of COVID-19 intensive care unit(ICU)patients provided by the national medical team in Wuhan were classified into discrete and continuous variable *** continuous data were discretized using an entropy-based method and transformed into serial information margins,in which each information margin is related to a specific symptom or clinical ***,all these native and processed discrete data were used to configure a readable scorecard through logistic regression,which is the desired scientific tool aforementioned.A total of 322 ICU patients(age:[median:64,interquartile range:54-75],males:178[55.28%],and death:72[22.36%])were included in the *** of mortality in COVID-19 patients can be evaluated using a scorecard model(calibration slope:1.343,Brier:0.048,Dxy=0.972,and population stability index=0.071),with desired model performances(accuracy=0.948,area under curve=0.99,sensitivity=1,and specificity=0.939).This new model can interpret clinical meanings from complex data,and compare it with existing machine learning methods through a black-box *** new data-information model answers a critical question of how a computing algorithm produces clinically meaningful results that will help physicians logically allocate medical resources for COVID-19 ***,this tool has limitations,giving that this research is a retrospective ***,this tool will be tested further and optimized for adaptation to similar clinical cases in the future.

关键词： COVID-19 scorecard clinical-interpretable machine learning ICU admission control

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ATHLET程序的钠冷快堆应用扩展及其验证

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原子能科学技术 2013年第11期47卷 2053-2058页

作者：周翀 Klaus Huber 程旭上海交通大学核科学与工程学院上海200240 卡尔斯鲁厄理工大学聚变与反应堆技术研究所德国卡尔斯鲁厄76131

系统分析程序是对钠冷快堆的冷却剂回路系统进行全局模拟、瞬态及事故安全分析的重要工具。本工作对德国核设施与反应堆安全机构(GRS)开发的轻水堆最佳估算系统程序ATHLET进行修改,增加了钠的物性公式和传热关系式,将其适用范围扩展到... 详细信息

系统分析程序是对钠冷快堆的冷却剂回路系统进行全局模拟、瞬态及事故安全分析的重要工具。本工作对德国核设施与反应堆安全机构(GRS)开发的轻水堆最佳估算系统程序ATHLET进行修改,增加了钠的物性公式和传热关系式,将其适用范围扩展到钠冷快堆。为验证修改过的ATHLET程序,对法国凤凰(Phenix)反应堆系统建模,并对其自然对流实验进行模拟,将计算结果与实验数据进行比较。结果显示,ATHLET程序的钠冷快堆应用扩展具有良好的适用性。

关键词：钠冷快堆 ATHLET程序自然对流

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CMMCAN:Lightweight Feature Extraction and Matching Network for Endoscopic Images Based on Adaptive Attention

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Computers, Materials & Continua 2024年第8期80卷 2761-2783页

作者： Nannan chong Fan Yang School of Electronic and Information Engineering Hebei University of TechnologyTianjin300401China School of Information and Intelligence Engineering Tianjin Renai CollegeTianjin301636China

In minimally invasive surgery,endoscopes or laparoscopes equipped with miniature cameras and tools are used to enter the human body for therapeutic purposes through small incisions or natural ***,in clinical operating environments,endoscopic images often suffer from challenges such as low texture,uneven illumination,and non-rigid structures,which affect feature observation and *** can severely impact surgical navigation or clinical diagnosis due to missing feature points in endoscopic images,leading to treatment and postoperative recovery issues for *** address these challenges,this paper introduces,for the first time,a Cross-Channel Multi-Modal Adaptive Spatial Feature Fusion(ASFF)module based on the lightweight architecture of ***,a novel lightweight feature extraction and matching network based on attention mechanism is *** network dynamically adjusts attention weights for cross-modal information from grayscale images and optical flow images through a dual-branch Siamese *** extracts static and dynamic information features ranging from low-level to high-level,and from local to global,ensuring robust feature extraction across different widths,noise levels,and blur *** and local matching are performed through a multi-level cascaded attention mechanism,with cross-channel attention introduced to simultaneously extract low-level and high-level *** ablation experiments and comparative studies are conducted on the HyperKvasir,EAD,M2caiSeg,CVC-ClinicDB,and UCL synthetic *** results demonstrate that the proposed network improves upon the baseline EfficientViT-B3 model by 75.4%in accuracy(Acc),while also enhancing runtime performance and storage *** compared with the complex DenseDescriptor feature extraction network,the difference in Acc is less than 7.22%,and IoU calculation results on specific datasets outperform complex dense ***

关键词： Feature extraction and matching lightweighted network medical images endoscopic attention

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Quantum Curve and Bilinear Fermionic Form for the Orbifold Gromov–Witten Theory of P[r]

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Acta Mathematica Sinica,English Series 2024年第1期40卷 43-80页

作者： chong Yao CHEN Shuai GUO Mathematics Department Duke UniversityBox 90320DurhamNC 27708-0320USA School of Mathematical Sciences Peking UniversityBeijing 100871P.R.China

We construct the quantum curve for the Baker-Akhiezer function of the orbifold Gromov-Witten theory of the weighted projective line P[r].Furthermore,we deduce the explicit bilinear Fermionic formula for the(stationary... 详细信息

关键词： Quantum curve Free Fermions Gromov-Witten invariants Orbifold P^(1)

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“一带一路”建设给人民币国际化带来的机遇和挑战

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税务与经济 2017年第5期 43-47页

作者：周冲吉林大学经济学院吉林长春130022 长春光华学院金融学院吉林长春130031

"一带一路"建设促使更多的中国企业积极开拓国际市场,扩大对外贸易,带动人民币的进一步流通,这势必为人民币国际化进程提供重要的发展机遇。但是在我国利率、汇率市场化改革滞后,金融创新与金融改革不足,现有的以美元为主体的世界货币... 详细信息

"一带一路"建设促使更多的中国企业积极开拓国际市场,扩大对外贸易,带动人民币的进一步流通,这势必为人民币国际化进程提供重要的发展机遇。但是在我国利率、汇率市场化改革滞后,金融创新与金融改革不足,现有的以美元为主体的世界货币体系难以动摇的背景下,人民币国际化还面临着人民币汇率波动幅度增大、国际资本流动加剧等挑战。因此,我国应进一步促进国内的经济增长,完善金融市场建设,加强国际贸易合作,并对我国的对外投资和对外贸易企业进行指导和规范,以有力推进"一带一路"建设中的人民币国际化进程。

关键词：人民币国际化一带一路对外贸易金融市场

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安徽霍邱徐台汉墓发掘报告

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东南文化 2009年第4期 37-43页

作者：周崇云安徽大学历史系安徽合肥230039

2005年霍邱发掘的三座汉墓,形制相同,均为平面呈刀形的土坑竖穴墓,时代为西汉晚期以后至新莽时期,为研究这一地区汉代文化增添了新的资料。

关键词：霍邱汉代墓葬发掘

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明清时期汉文化教育与黔南民族文化教育融合摭考

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民族教育研究 2015年第2期26卷 81-88页

作者：周崇启贵州省黔南布依族苗族自治州教育局教科所贵州都匀558000

随着明清时期皇室制度的确立与文教政策的推行,汉文化与黔南少数民族文化不断交汇融合;明清文人学士被贬贵州黔南,兴学教授汉文化,形成黔南良好学风;汉文化书院、社学、地方义学与黔南少数民族私塾的珠联璧合,成就了清代黔南都匀墨冲萧... 详细信息

随着明清时期皇室制度的确立与文教政策的推行,汉文化与黔南少数民族文化不断交汇融合;明清文人学士被贬贵州黔南,兴学教授汉文化,形成黔南良好学风;汉文化书院、社学、地方义学与黔南少数民族私塾的珠联璧合,成就了清代黔南都匀墨冲萧家村的"五进士",培养了清代"西南大儒"莫友芝等一代布依族英才,造就了"影山文化";明清时期汉文化与黔南少数民族文化相互结合,优势互补,水乳交融,成就了骄人的业绩,增进了民族凝聚力。

关键词：明清时期汉文化民族教育融合

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Establishing the link between D-mannose and juvenile grass carp ( Ctenopharyngodon idella): ): Improved growth and intestinal structure associated with endoplasmic reticulum stress, mitophagy, and apical junctional complexes

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ANIMAL NUTRITION 2024年第3期18卷 450-463页

作者： Zhang, chong Feng, Lin Wu, Pei Liu, Yang Jin, Xiaowan Ren, Hongmei Li, Hua Wu, Fali zhou, Xiaoqiu Jiang, Weidan Sichuan Agr Univ Anim Nutr Inst Chengdu 611130 Peoples R China Sichuan Agr Univ Univ Key Lab Sichuan Prov Fish Nutr & Safety Prod Chengdu 611130 Peoples R China Minist Agr & Rural Affairs Minist Educ Key Lab Anim Dis Resistance Nutr Key Lab Sichuan Prov Chengdu 611130 Peoples R China

D-mannose, essential for protein glycosylation, has been reported to have immunomodulatory effects and to maintain intestinal flora homeostasis. In addition to evaluating growth performance, we examined the impact of D-mannose on the structure of epithelial cells and apical junction complexes in the animal intestine. All 1800 grass carp (16.20 +/- 0.01 g) were randomly divided into six treatments with six replicates of 50 fish each and fed with six different levels of D-mannose (0.52, 1.75, 3.02, 4.28, 5.50 and 6.78 g/kg diet) for 70 d. The study revealed that D-mannose increased feed intake (P P 0.05). Dmannose supplementation at 1.75 g/kg increased crude protein content in fish and lipid production value (P P < 0.05). D-mannose supplementation at 4.28 g/kg increased intestinal length, intestinal weight and fold height of grass carp compared to the control group (P P < 0.05). This improvement may be attributed to the phosphomannose isomerase (PMI)-mediated enhancement of glycolysis. This study found that Dmannose supplementation at 4.28 or 3.02 g/kg reduced serum diamine oxidase activity or D-lactate content (P P < 0.05) and improved cellular and intercellular structures for the first time. The improvement of cellular redox homeostasis involves alleviating endoplasmic reticulum (ER) stress through the inositolrequiring enzyme 1 (IRE1), RNA-dependent protein kinase-like ER kinase (PERK), and activating transcription factor 6 (ATF6) signaling pathways. The alleviation of ER stress may be linked to the phosphomannomutase (PMM)-mediated enhancement of protein glycosylation. In addition, ubiquitindependent [PTEN-induced putative kinase 1 (PINK1)/Parkin] and ubiquitin-independent [BCL2interacting protein 3-like (BNIP3L), BCL2-interacting protein 3 (BNIP3), and FUN14 domain containing 1 (FUNDC1)] mitophagy may play a role in maintaining cellular redox homeostas

关键词： Grass carp ( Ctenopharyngodon idella ) D-mannose Intestine structure Endoplasmic reticulum stress Mitophagy Apical junctional complex NF-KAPPA-B ANTIOXIDANT STATUS OXIDATIVE STRESS PHYSICAL BARRIER TIGHT JUNCTIONS GRADED-LEVELS HOMEOSTASIS APOPTOSIS NRF2 MITOCHONDRIAL

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