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Engineering catalytic defects via molecular imprinting for high energy li-S pouch cells

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National Science Review 2024年第7期11卷 239-251页

作者： Yufei Zhao Chuannan Geng li Wang Yun Cao Haotian Yang linkai Peng Xin Jiang Yong Guo Xiaolin ye Wei Lv Quan-Hong Yang Shenzhen Geim Graphene Center Engineering Laboratory for Functionalized Carbon Materials Tsinghua Shenzhen International Graduate School Tsinghua University Nanoyang Group Tianjin Key Laboratory of Advanced Carbon and Electrochemical Energy StorageSchool of Chemical Engineering and Technology and Collaborative Innovation Center of Chemical Science and Engineering(Tianjin)Tianjin University Joint School of National University of Singapore and Tianjin University International Campus of Tianjin University

Heterogeneous catalysis promises to accelerate sulfur-involved conversion reactions in lithium-sulfur batteries. Solid-state li2S dissociation remains as the rate-limiting step because of the weakly matched solid-solid electrocatalysis interfaces. We propose an electrochemically molecular-imprinting strategy to have a metal sulfide（MS） catalyst with imprinted defects in positions from which the pre-implanted li2S has been electrochemically removed. Such tailor-made defects enable the catalyst to bind exclusively to li atoms in li2S reactant and elongate the li–S bond, thus decreasing the reaction energy barrier during charging. The imprinted Ni3S2catalyst shows the best activity due to the highest defect concentration among the MS catalysts examined. The li2S oxidation potential is substantially reduced to 2.34 V from 2.96 V for the counterpart free of imprinted vacancies, and an Ah-level pouch cell is realized with excellent cycling performance. With a lean electrolyte/sulfur ratio of 1.80 μL mgS–1, the cell achieves a benchmarkedly high energy density beyond 500 Wh kg–1.

关键词： lithium-sulfur battery catalysts defects energy density metal sulfide

Evolution and function of residual solvent in polymer-li_2B_(12)H_(12) composite solid electrolyte

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Rare Metals 2024年第8期43卷 3748-3757页

作者： Xiang-Yang ye Ke-Pan Bao Sai-Nan Luo Xin li Tai-Qiang Chen Shui-Xin Xia Tao Yuan Yue-Peng Pang Shi-You Zheng School of Materials and Chemistry University of Shanghai for Science and TechnologyShanghai 200093China Department of Materials Science and Engineering National University of SingaporeSingapore 119077Singapore

Composite solid electrolytes(CSEs) containing polymer matrices and inorganic fillers hold promise for the next generation of solid-state ***,the role of residual solvents in CSEs remains *** study investigated the evolution and function of the residual solvent in a polymer-li_2B_(12)H_(12) CSE.A partial reaction occurred between li_2B_(12)H_(12) and solvent N,N-dimethylformamide(DMF),which produced dimethylaminomethanol(DMAM) in the *** functional theory calculations have revealed that DMA M forms stronger hydrogen bonds with polyvinylidene fluoride chains than DMF,which can have a plasticizing effect on the polymer matrix,leading to lower crystallinity and quicker segment ***,this CSE exhibited improved li-ion conducting properties,enabling the stable cycling of li‖liFePO_(4) solid-state *** study provided insights into the role of residual solvents in CSEs.

关键词： Composite solid electrolyte Residual solvent lithium borohydride Plasticizing effect

Reduction of Tat-interacting Protein 30 Expression Could be a Prognostic Marker in Bladder Urothelial Cancer

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Chinese Medical Journal 2018年第2期131卷 188-193页

作者： ye-ping li Jian-Fang Zhu Ka-TeHuang Rong-Rong Wang Bing Cai Hui Xie Hong-De Chen Department of Urology The First Affiliated Hospital of Wenzhou Medical University Wenzhou Zhejiang 325000 China Department of Vascular Surgery The Second Hospital of Shaoxing City Shaoxing Zhejiang 312000 China Department of Pathology The First Affiliated Hospital of Wenzhou Medical University Wenzhou Zhejiang 325000 China

Background： Tat-interacting protein 30 （TIP30） has been reported to be a tumor suppressor, with reduced or absent expression in various tumors. However, its role in bladder urothelial cancer （BUC） has not been investigated. Therefore, herein, we investigated the expression of T1P30 protein in BUC and normal bladder mucosa and the clinical significance of TIP30 expression in the prognosis of BUC. Methods： We reviewed data from 79 cases of BUC and 15 adjacent tissue samples from 79 patients treated at our institution between 2004 and 2007. TIP30 expression was examined by immunohistochemistry. The relationship between TIP30 expression and tumor stage, histological grade, and survival was analyzed. Differences between groups were evaluated using the t-test or matched-pairs test, and differences in the survival rates were analyzed with the log-rank test. Results： TIP30 protein expression was significantly reduced in BUC tissue （t = -6.91, P 〈 0.05） compared with normal tissue samples, and in invasive bladder cancer （t = 10.89, P 〈 0.05） compared with superficial bladder cancer. TIP30 protein expression differed significantly among different differentiated groups classified either according to the World Health Organization （2004, F = 17.48, P 〈 0.01） or World Health Organization （1973, F = 10.68, P 〈 0.01）. TIP30 protein expression was significantly reduced in high-grade papillary urothelial carcinoma compared with papillary urothelial neoplasm of low malignant potential （P 〈 0.05） and low-grade papillary urothelial carcinoma （P 〈 0.05）. Meanwhile, TIP30 protein expression was significantly reduced in Grade 111 BUC, compared with Grade I （P 〈 0.05） and Grade 11 （P 〈 0.05）. Patients with low T1P30 expression showed a higher incidence of disease progression than those with high TIP30 expression （t - 2.63, P 〈 0.05）. Kaplan-Meier survival analysis showed a strong positive relationship between TIP30 expression and overall survival （OS）（x^2 = 17.29, P 〈 0.05）. Conclusions： T

关键词： Bladder Urothelial Cancer Overall Survival Time Tat-interacting Protein 30

Analysing free way diverging risks using high-resolution trajectory data based on conflict prediction models

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Transportation Safety and Environment 2024年第1期6卷 8-21页

作者： ye li Sani Dalhatu Chen Yuan School of Traffic and Transportation Engineering Central South UniversityChangshaHunan 410075P.R.China Department of Computer Science City University of Hong KongKowloonHong Kong 999077P.R.China.

This study aims to develop a reliable safety evaluation model for diverging vehicles and investigates the impact of the surrounding traffic environment on freeway diverging ***-resolution trajectory data from three sites in the Netherlands(Delft,Ter-Heide and Zonzeel)were employed for the risk *** regression(LR),support vector machine(SVM),random forest(RF),extreme randomize trees(ET),adaptive boosting(Adaboost),extreme gradient boosting(XGboost)and multilayer perceptron(MLP),were developed for safety *** result showed that MLP outperforms the other models for diverging risk prediction over all the indicators,conflict thresholds and *** matrix,shapely addictive explanation(SHAP),and LR algorithms were further adopted to interpret the influence of the surrounding *** indicates that an increase in traffic density,subject vehicle(SV)lateral speed,the distance of SV from ramp nose and SV length would increase the diverging *** the same time,an increase in leading vehicle speed and space headway would decrease diverging ***,spatial analysis was also conducted to explore the stability of identified traffic features regarding the impact on the diverging risk across the sites.

关键词： diverging risk,machine learning shapely addictive explanation(SHAP) linear regression(LR) extended time-to-collision(TET) time-integrated time-to-collision(TIT)

The Unconditional Stability for the Multigroup Multidelays Neutral Type linear Constant Control System

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Wuhan University Journal of Natural Sciences 1999年第4期4卷 382-386页

作者： li ye ping College of Mathematics and Computer Science, Wuhan University, Wuhan,430072, China Wuhan University College of Mathematics and Computer Science Wuhan China (GRID:grid.49470.3e) (ISNI:***)

Applying the frequency domain method and the inequality method, we discussed the unconditional stability problem of the multigroup multidelays neutral type linear constant continuous control system, and obtained some ... 详细信息

关键词： multidelays neutral type unconditional stability

Morphogenesis and Molecular Phylogeny of a Marine Urostylid Ciliate Apokeronopsis wrighti(Protista, Ciliophora, Hypotrichia)

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Journal of Ocean University of China 2024年第4期23卷 1067-1075页

作者： liAN Chunyu li ping ZHANG Tengteng SHAO Chen Department of Zoology College of Life SciencesShaanxi Normal UniversityXi’an 710119China Powerchina Northwest Engineering Corporation limited Xi’an 710065China

Hypotrichs are one of the highly differentiated ciliated lineages which play important roles in ecological, environmental,evolutionary and basic biological studies. In the present study, we investigated the living characteristics, infraciliature, nuclear apparatus, ontogenesis and phylogenetic position of a marine hypotrichous ciliate, Apokeronopsis wrighti Long et al., 2008, which was isolated from coastal waters in Shenzhen, China. The new isolate resembles the type population in terms of morphological characteristics, morphometrics, and SSU rRNA gene sequence that is with a 99.7% similarity. Ontogenesis of A. wrighti is characterized by oral primordium for the proter as well as marginal and dorsal kineties anlagen in both filial products formed de novo, and the cirral row arranged along the paroral and endoral arises from several anterior frontoventral-transverse cirral streaks. Phylogenetic analyses based on SSU and concatenated gene data suggest that five species of Apokeronopsis form a monophyletic clade, and the genus Apokeronopsis is closely related to Thigmokeronopsis and Metaurostylopsis.

关键词： 18S rRNA gene Apokeronopsis ciliated protists multi-gene ontogenesis systematics Urostylida

Numerical and experimental study of the effects of wind turbine operation on sand-dust transport characteristics

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Science China(Physics,Mechanics & Astronomy) 2024年第4期67卷 97-113页

作者： Gaosheng Ma Hong Han ye li Deshun li Yan Wang Ning Fu Quan Zheng Rennian li School of Energy and Power Engineering Lanzhou University of TechnologyLanzhou 730050China Gansu Provincial Technology Center for Wind Turbines Lanzhou 730050China Key Laboratory of Fluid Machinery and Systems Lanzhou 730050China Multiple Function Towing Tank Laboratory State Key Laboratory of Ocean EngineeringSchool of Naval ArchitectureOcean and Civil EngineeringShanghai Jiao Tong UniversityShanghai 200240China

Given factors such as reduced land availability for onshore wind farms,wind resource enrichment levels,and costs,there is a growing trend of establishing wind farms in deserts,the Gobi,and other arid ***,the relationship between sanddust weather environments and wind turbine operations has garnered significant *** investigate the impact of wind turbine wakes on sand-dust transportation,this study employs large eddy simulation to model flow fields,coupled with an actuator line model for simulating rotating blades and a multiphase particle in cell model for simulating sand *** research focuses on a horizontal axis wind turbine model and examines the motion and spatiotemporal distribution characteristics of four typical sizes of sand particles in the turbine *** findings reveal that sand particles of varying sizes exhibit a spiral settling pattern after traversing the rotating plane of wind turbine blades,influenced by blade shedding vortex and *** particles tend to cluster in the peripheries of the vortex cores of low vorticity in the wind turbine *** rotation of wind turbines generates a wake vortex structure that causes a significant clustering of sand particles at the tip *** the wake distance increases,the particles that cluster at the turbine's tip gradually spread outward to approximately twice the rotor diameter and then begin to mix with the incoming flow *** turbines have a noticeable impact on sand-dust transportation,hindering their movement to a significant *** average sand-blocking rate exhibits a trend of initially increasing and then decreasing as the wake distance *** its peak,the sand-blocking rate reaches an impressive 67.55%.The presence of wind turbines induces the advanced settling of sand particles,resulting in a“triangular”distribution of the deposition within the ground projection area of the wake.

关键词： wind turbine particle transportation actuator line model dry deposition particle clustering

Ripple Knowledge Graph Convolutional Networks for Recommendation Systems

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Machine Intelligence Research 2024年第3期21卷 481-494页

作者： Chen li Yang Cao ye Zhu Debo Cheng Chengyuan li Yasuhiko Morimoto Graduate School of Informatics Nagoya UniversityChikusaNagoya 464-8602Japan Centre for Cyber Resilience and Trust Deakin UniversityBurwood 3125Australia Science TechnologyEngineering and Mathematics(STEM)University of South AustraliaAdelaide 5000Australia Graduate School of Engineering Hiroshima UniversityHigashi-hiroshima 10587Japan

Using knowledge graphs to assist deep learning models in making recommendation decisions has recently been proven to effectively improve the model′s interpretability and *** paper introduces an end-to-end deep learning model,named representation-enhanced knowledge graph convolutional networks(RKGCN),which dynamically analyses each user′s preferences and makes a recommendation of suitable *** combines knowledge graphs on both the item side and user side to enrich their representations to maximize the utilization of the abundant information in knowledge *** is able to offer more personalized and relevant recommendations in three different *** experimental results show the superior effectiveness of our model over 5 baseline models on three real-world datasets including movies,books,and music.

关键词： Deep learning recommendation systems knowledge graph graph convolutional networks(GCNs) graph neural networks(GNNs)

Spatially explicit reconstruction of cropland cover in Europe from AD 1800 to 2000

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Science China Earth Sciences 2024年第9期67卷 2953-2971页

作者： Jun li Yu ye Xiuqi FANG Diyang ZHANG Zhilei WU Faculty of Geographical Science Beijing Normal UniversityBeijing 100875China Key Laboratory of Environmental Change and Natural Disaster Ministry of EducationBeijing Normal UniversityBeijing 100875China College of Geographical Science Qinghai Normal UniversityXining 810016China

One of the challenges in global change research is the significant uncertainty in global historical land use and land cover(LUCC)datasets,which are widely used as foundational *** addition to the regional cropland area reconstructions,improving the grid allocation method is another feasible way to raise the reliability of historical LUCC *** this study,an integrated reconstruction of the national cropland areas over the past 200 years was developed for 36 European *** that,the allocation algorithm was built using physiogeographic variables and historical city sites for accounting for land suitability and cultivation preferences,***,cropland data in Europe with a spatial resolution of 5′×5′at five time sections from AD 1800 to 2000 were generated using the optimal allocation algorithm in accordance with the stages of the regional *** results were as follows:(1)The dominant factors governing the distribution of croplands in Europe vary at different agricultural stages,but the results can be merged *** suitability was more optimal for allocation during the modern agricultural stage(AD 1950 and 2000);the priority index combined with land suitability and cultivation preference was more reasonable for allocation during the traditional agricultural stage(AD 1800).The average of the allocations by priority index and the land suitability could be adopted as the allocation results during the transitional stage(AD 1850 and 1900)because the grids for absolute differences within±10 and±20 percentage points between the results obtained from the above two allocations were above 80% and 95%,respectively,which means the two allocation results could be merged.(2)Over the past 200 years,the total cropland area in Europe first increased to a peak in AD 1900 and then ***,the centre of the higher cropland fraction shifted from the western part of Europe in AD 1800 to the eastern part of the continent after AD 1950.(3)

关键词： Land use and land cover change Historical cropland Gridding allocation Europe Past 200 years