检索结果-南通市图书馆

Emerging catalytic materials for practical lithium-sulfur batteries

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Energy Chemistry 2023年第1期76卷 127-145,I0004页

作者： fangyi shi Lingling Zhai Qingqing Liu Jingya Yu Shu Ping Lau Bao Yu Xia Zheng-Long Xu Department of Industrial and Systems Engineering Department of Applied PhysicsResearch Institute of Advanced Manufacturingthe Hong Kong Polytechnic UniversityHung HomHong Kong SARChina Key Laboratory of Material Chemistry for Energy Conversion and Storage(Ministry of Education) Hubei Key Laboratory of Material Chemistry and Service FailureSchool of Chemistry and Chemical EngineeringHuazhong University of Science and Technology(HUST)Wuhan 430074HubeiChina State Key Laboratory of Ultraprecision Machining Technology the Hong Kong Polytechnic UniversityHung HomHong Kong SARChina Hong Kong Polytechnic University Shenzhen Research Institute Shenzhen 518057GuangdongChina

High-energy lithium-sulfur batteries(LSBs)have experienced relentless development over the past decade with discernible improvements in electrochemical ***,a scrutinization of the cell operation conditions reveals a huge gap between the demands for practical batteries and those in the *** sulfur loading,a high electrolyte/sulfur(E/S)ratio and excess anodes for lab-scale LSBs significantly offset their high-energy *** approach practical LSBs,high loading and lean electrolyte parameters are needed,which involve budding challenges of slow charge transfer,polysulfide precipitation and severe shuttle *** track these obstacles,the exploration of electrocatalysts to immobilize polysulfides and accelerate Li-S redox kinetics has been widely ***,this review aims to survey state-of-the-art catalytic materials for practical LSBs with emphasis on elucidating the correlation among catalyst design strategies,material structures and electrochemical *** also statistically evaluate the state-of-the-art catalyst-modified LSBs to identify the remaining discrepancy between the current advancements and the real-world *** closing,we put forward our proposal for a catalytic material study to help realize practical LSBs.

关键词： Lithium-sulfur battery Catalytic materials High sulfur loading Lean electrolyte

在线全文

学校读者我要写书评

暂无评论

基于半监督密集阶梯网络的工业故障识别

化工学报 2018年第7期69卷 3083-3091页

作者：施方迤汪子扬梁军浙江大学工业控制研究所工业控制技术国家重点实验室浙江杭州310027

针对工业过程故障识别的需要和实际工业数据小比例有标签、大比例无标签的特点,研究了基于深度学习的半监督故障分类方法。在半监督阶梯网络的基础上,通过对网络结构和损失函数的改进,提出了半监督密集阶梯网络算法。该算法改进了原始... 详细信息

针对工业过程故障识别的需要和实际工业数据小比例有标签、大比例无标签的特点,研究了基于深度学习的半监督故障分类方法。在半监督阶梯网络的基础上,通过对网络结构和损失函数的改进,提出了半监督密集阶梯网络算法。该算法改进了原始的网络结构,添加了各层之间的密集连接,尝试最大化阶梯网络内部的数据信息流,使得各编码解码层之间的特征得以传递和复用。针对损失函数的特点,添加了无噪声编码层的预测输出损失,确保训练目标与模型输出一致。实验结果证明了所提出的新方法能在工业过程的小比例有标签数据情况下,获得理想的分类效果。

关键词：半监督学习阶梯网络密集连接工业故障分类算法神经网络优化自编码器

Prediction and optimization of flue pressure in sintering process based on SHAP

在线全文

学校读者我要写书评

暂无评论

International Journal of Minerals,Metallurgy and Materials 2025年第2期32卷 346-359页

作者： Mingyu Wang Jue Tang Mansheng Chu Quan shi Zhen Zhang School of Metallurgy Northeastern UniversityShenyang 110819China Liaoning Low-Carbon Steelmaking Technology Engineering Research Center Northeastern UniversityShenyang 110819China Engineering Research Center of Frontier Technologies for Low-Carbon Steelmaking(Ministry of Education) Shenyang 110819China

Sinter is the core raw material for blast *** pressure,which is an important state parameter,affects sinter *** this paper,flue pressure prediction and optimization were studied based on the shapley additive explanation(SHAP)to predict the flue pressure and take targeted adjustment ***,the sintering process data were collected and processed.A flue pressure prediction model was then constructed after comparing different feature selection methods and model algorithms using SHAP+extremely random-ized trees(ET).The prediction accuracy of the model within the error range of±0.25 kPa was 92.63%.SHAP analysis was employed to improve the interpretability of the prediction *** effects of various sintering operation parameters on flue pressure,the relation-ship between the numerical range of key operation parameters and flue pressure,the effect of operation parameter combinations on flue pressure,and the prediction process of the flue pressure prediction model on a single sample were analyzed.A flue pressure optimization module was also constructed and analyzed when the prediction satisfied the judgment *** operating parameter combination was then *** flue pressure was increased by 5.87%during the verification process,achieving a good optimization effect.

关键词： sintering process flue pressure shapley additive explanation prediction optimization

On the Application of Mixed Models of Probability and Convex Set for Time-Variant Reliability Analysis

在线全文

学校读者我要写书评

暂无评论

Computer Modeling in Engineering & Sciences 2024年第5期139卷 1981-1999页

作者： fangyi Li Dachang Zhu Huimin shi Center for Research on Leading Technology of Special Equipment School of Mechanical and Electric EngineeringGuangzhou UniversityGuangzhou510006China

In time-variant reliability problems,there are a lot of uncertain variables from different ***,it is important to consider these uncertainties in *** addition,time-variant reliability problems typically involve a complexmultilevel nested optimization problem,which can result in an enormous amount of *** this end,this paper studies the time-variant reliability evaluation of structures with stochastic and bounded uncertainties using a mixed probability and convex set *** this method,the stochastic process of a limit-state function with mixed uncertain parameters is first discretized and then converted into a timeindependent reliability ***,to solve the double nested optimization problem in hybrid reliability calculation,an efficient iterative scheme is designed in standard uncertainty space to determine the most probable point(MPP).The limit state function is linearized at these points,and an innovative random variable is defined to solve the equivalent static reliability analysis *** effectiveness of the proposed method is verified by two benchmark numerical examples and a practical engineering problem.

关键词： Mixed uncertainty probability model convex model time-variant reliability analysis

改良腹腔镜-内镜双镜联合手术与腹腔镜辅助内镜下切除术治疗早期胃癌的临床效果分析

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

中华普外科手术学杂志（电子版） 2022年第3期16卷 267-270页

作者：郑尧帆林方德史方义林师佈文昌市人民医院普通、肿瘤外科海南文昌571399 海南医学院第一附属医院普通外海口570102

目的探讨改良腹腔镜-内镜双镜联合手术(MLECS)与腹腔镜辅助内镜下切除术(LAER)治疗早期胃癌的临床效果。方法前瞻性选取2018年1月至2020年6月期间收治的94例早期胃癌患者作为研究对象,采用数字随机法将患者分为LAER组和MLECS组,每组47例... 详细信息

目的探讨改良腹腔镜-内镜双镜联合手术(MLECS)与腹腔镜辅助内镜下切除术(LAER)治疗早期胃癌的临床效果。方法前瞻性选取2018年1月至2020年6月期间收治的94例早期胃癌患者作为研究对象,采用数字随机法将患者分为LAER组和MLECS组,每组47例。LAER组采用腹腔镜辅助内镜下切除术治疗,MLECS组采用改良腹腔镜-内镜双镜联合手术治疗。选用SPSS 22.0软件处理数据,围手术期各项指标和视觉模拟量表(VAS)疼痛评分等计量资料以(x±s)表示,行独立样本t检验;术后并发症等计数资料以[n(%)]表示,行X^(2)检验。P0.05);两组患者术后总并发症的发生率比较(6.4% vs 12.8%),差异无统计学意义(P>0.05);术后随访6~36个月,中位随访时间21个月,两组患者均未出现复发和转移。结论MLECS手术治疗早期胃癌安全、有效、可行,具有手术时间短、创伤小、恢复快等优势,更能体现微创外科的优越性。

关键词：胃肿瘤腹腔镜内窥镜双镜联合手术

The pivotal role of microglia in injury and the prognosis of subarachnoid hemorrhage

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Neural Regeneration Research 2025年第7期20卷 1829-1848页

作者： Wenjing Ning shi Lv Qian Wang Yuzhen Xu Department of Rehabilitation The Second Affiliated Hospital of Shandong First Medical UniversityTaianShandong ProvinceChina Department of Central Laboratory The Affiliated Taian City Central Hospital of Qingdao UniversityTaianShandong ProvinceChina

Subarachnoid hemorrhage leads to a series of pathological changes,including vascular spasm,cellular apoptosis,blood–brain barrier damage,cerebral edema,and white matter ***,which are the key immune cells in the central nervous system,maintain homeostasis in the neural environment,support neurons,mediate apoptosis,participate in immune regulation,and have neuroprotective *** evidence has shown that microglia play a pivotal role in the pathogenesis of subarachnoid hemorrhage and affect the process of injury and the prognosis of subarachnoid ***,microglia play certain neuroprotective roles in the recovery phase of subarachnoid *** approaches aimed at modulating microglia function are believed to attenuate subarachnoid hemorrhage *** provides new targets and ideas for the treatment of subarachnoid ***,an in-depth and comprehensive summary of the role of microglia after subarachnoid hemorrhage is still *** review describes the activation of microglia after subarachnoid hemorrhage and their roles in the pathological processes of vasospasm,neuroinflammation,neuronal apoptosis,blood–brain barrier disruption,cerebral edema,and cerebral white matter *** also discusses the neuroprotective roles of microglia during recovery from subarachnoid hemorrhage and therapeutic advances aimed at modulating microglial function after subarachnoid ***,microglia in subarachnoid hemorrhage are targeted with TLR inhibitors,nuclear factor-κB and STAT3 pathway inhibitors,glycine/tyrosine kinases,NLRP3 signaling pathway inhibitors,Gasdermin D inhibitors,vincristine receptorαreceptor agonists,ferroptosis inhibitors,genetic modification techniques,stem cell therapies,and traditional Chinese ***,most of these are still being evaluated at the laboratory *** clinical studies and data on subarachnoid hemorrhage are required to improve the treatment of subarachnoid hemor

关键词： apoptosis blood–brain barrier brain edema microglia neuroinflammation neuron neuroprotection subarachnoid hemorrhage vasoconstriction white matter injury

Synthesis of size-controlled CoMn2O4 quantum dots supported on carbon nanotubes for electrocatalytic oxygen reduction/evolution

在线全文

学校读者我要写书评

暂无评论

Nano Research 2017年第11期10卷 3836-3847页

作者： Jiajia shi Kaixiang Lei Weiyi Sun Fujun Li fangyi Cheng Jun Chen Key Laboratory of Advanced Energy Materials Chemistry(Ministry of Education) College of Chemistry Nankai University Tianjin 300071 China State Key Laboratory of Element-Organic Chemistry Collaborative Innovation Center of Chemical Science and Engineering Nankai University Tianjin 300071 China

A combined hot-injection and heat-up method was developed to synthesize monodisperse and uniform CoMn2O4 quantum dots （CMO QDs）.CMO QDs with average size of 2.0,3.9,and 5.4 nm were selectively obtained at 80,90,and 105 ℃,*** CMO QDs supported on carbon nanotubes （CNTs） were employed as catalysts for the oxygen reduction/evolution reaction （ORR/OER） in alkaline solution to investigate their size-performance *** results revealed that the amount of surface-adsorbed oxygen and the band gap energy,which affect the charge transfer in the oxygen electrocatalysis processes,strongly depend on the size of the CMO *** CMO-3.9/CNT hybrid,consisting of CNT-supported CMO QDs of 3.9 nm size,possesses a moderate amount of surfaceadsorbed oxygen,a lower band gap energy,and a larger charge carrier concentration,and exhibits the highest electrocatalytic activity among the hybrid materials ***,the CMO-3.9/CNT hybrid displays ORR and OER performances similar to those of the benchmark Pt/C and RuO2 catalysts,respectively,due to the strong carbon-oxide interactions and the high dispersion of CoMn2O4 QDs on the carbon substrate;this reveals the huge potential of the CMO-3.9/CNT hybrid as a bifunctional OER/ORR *** present results highlight the importance of controlling the size of metal oxide nanodots in the design of active oxygen electrocatalysts based on spinel-type,nonprecious metal oxides.

关键词： size effect spinel oxide quantum dots electrocatalysis

Low-temperature chlorination roasting technology for the simultaneous recovery of valuable metals from spent LiCoO_(2)cathode material

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

International Journal of Minerals,Metallurgy and Materials 2025年第1期32卷 80-91页

作者： Junjie shi Changle Hou Jingjing Dong Dong Chen Jianzhong Li Key Laboratory for Ecological Metallurgy of Multimetallic Mineral(Ministry of Education) Northeastern UniversityShenyang 110819China School of Metallurgy Northeastern UniversityShenyang 110819China

With the continuous increase in the disposal volume of spent lithium-ion batteries(LIBs),properly recycling spent LIBs has become essential for the advancement of the circular *** study presents a systematic analysis of the chlorination roasting kinetics and proposes a new two-step chlorination roasting process that integrates thermodynamics for the recycling of LIB cathode *** activation energy for the chloride reaction was 88.41 kJ/mol according to thermogravimetric analysis–derivative thermogravimetry data obtained by using model-free,model-fitting,and Z(α)function(αis conversion rate).Results indicated that the reaction was dominated by the first-order(F1)model when the conversion rate was less than or equal to 0.5 and shifted to the second-order(F2)model when the conversion rate exceeded *** conditions were determined by thoroughly investigating the effects of roasting temperature,roasting time,and the mass ratio of NH_(4)Cl to LiCoO_(2).Under the optimal conditions,namely 400℃,20 min,and NH_(4)Cl/LiCoO_(2)mass ratio of 3:1,the leaching efficiency of Li and Co reached 99.43% and 99.05%,*** of the roasted products revealed that valuable metals in LiCoO_(2)transformed into CoCl_(2) and ***,the reaction mechanism was elucidated,providing insights for the establishment of a novel low-temperature chlorination roasting technology based on a crystal structure *** technology can guide the development of LIB recycling processes with low energy consumption,low secondary pollution,high recovery efficiency,and high added value.

关键词： spent lithium-ion battery thermodynamics chlorination roasting kinetics circular economy

Flexible molecules dedicate to release strain of inverted inorganic perovskite solar cell

在线全文

学校读者我要写书评

暂无评论

Journal of Energy Chemistry 2025年第1期100卷 87-93页

作者： Hongrui Sun Sanlong Wang Pengyang Wang Yali Liu Shanshan Qi Biao shi Ying Zhao Xiaodan Zhang Institute of Photoelectronic Thin Film Devices and Technology Renewable Energy Conversion and Storage Center State Key Laboratory of Photovoltaic Materials and CellsNankai University Key Laboratory of Photoelectronic Thin Film Devices and Technology of Tianjin Haihe Laboratory of Sustainable Chemical Transformations Engineering Research Center of Thin Film Photoelectronic Technology of Ministry of Education Collaborative Innovation Center of Chemical Science and Engineering (Tianjin)

The tensile strain in inorganic perovskite films induced by thermal annealing is one of the primary factors contributing to the inefficiency and instability of inorganic perovskite solar cells （IPSCs）,which reduces the defect formation ***,a flexible molecule 5-maleimidovaleric acid （5-MVA） was introduced as a strain buffer to release the residual strain of *** anhydride and carboxyl groups in 5-MVA interact strongly with the uncoordinated Pb2+through Lewis acid-base reaction,thus tightly“pull”the perovskite *** in-between soft carbon chain increased the structural flexibility of CsPbI2.85Br0.15perovskite materials,which effectively relieved the intrinsic internal strain of CsPbI2.85Br0.15,resisted the corrosion of external strain,and also reduced the formation of defects such as VIand *** addition,the introduction of 5-MVA improved crystal quality,passivated residual defects,and narrowed energy level ***,power conversion efficiency （PCE） of NiOxbased inverted IPSCs increased from 19.25% to 20.82% with the open-circuit voltage enhanced from 1.164 V to 1.230 *** release of strain also improved the stability of CsPbI2.85Br0.15perovskite films and devices.

关键词： Inverted inorganic perovskite solar cells Flexible molecules Strain release Crystallization Energy barrier High PCE