检索结果-南通市图书馆

Journal of Energy Chemistry 2024年第12期99卷 553-579页

作者： yuehua qian Lingyun Chen Department of Applied Chemistry School of Chemistry and Chemical EngineeringChongqing UniversityChongqing 401331China

Manganese(Mn)-based materials are considered as one of the most promising cathodes in zinc-ion batteries(ZIBs) for large-scale energy storage applications because of their multivalence, cost-effectiveness,natural availability, low toxicity, satisfactory capacity, and high operating voltage. In this review, the research status and related interface engineering strategies of Mn-based oxide cathode electrode materials for ZIB in recent years are summarized. Specifically, the review will focus on three types of interface engineering strategies, including interface reconstruction via cathode, interface reconstruction electrolyte, and protection via artificial cathode-electrolyte interphase(CEI) layer, within the context of their evolution of interface layer and corresponding electrochemical performance. A series of experimental variables, such as crystal structure, electrochemical reaction mechanism, and the necessary connection for the formation and evolution of interface layer, will be carefully analyzed by combining various advanced characterization techniques and theoretical calculations. Finally, suggestions and strategies are provided for reasonably designing the cathode-electrolyte interface to realize the excellent performance of Mn-based oxide zinc-based batteries.

关键词： Manganese oxides Manganese-based cathodes Interfacial engineering Reaction mechanism Zinc-ion batteries

Emerging perovskite materials for supercapacitors:Structure,synthesis,modification,advanced characterization,theoretical calculation and electrochemical performance

在线全文

学校读者我要写书评

暂无评论

Journal of Energy Chemistry 2024年第2期89卷 41-70,I0003页

作者： yuehua qian Qingqing Ruan Mengda Xue Lingyun Chen Department of Applied Chemistry School of Chemistry and Chemical EngineeringChongqing UniversityChongqing 401331China

As a new generation electrode materials for energy storage,perovskites have attracted wide attention because of their unique crystal structure,reversible active sites,rich oxygen vacancies,and good *** this review,the design and engineering progress of perovskite materials for supercapacitors(SCs)in recent years is ***,the review will focus on four types of perovskites,perovskite oxides,halide perovskites,fluoride perovskites,and multi-perovskites,within the context of their intrinsic structure and corresponding electrochemical performance.A series of experimental variables,such as synthesis,crystal structure,and electrochemical reaction mechanism,will be carefully analyzed by combining various advanced characterization techniques and theoretical *** applications of these materials as electrodes are then featured for various ***,we look forward to the prospects and challenges of perovskite-type SCs electrodes,as well as the future research direction.

关键词： Perovskite Modification engineering Oxygen vacancy Theoretical calculation methodology Supercapacitor

Emerging two-dimensional Mo-based materials for rechargeable metal-ion batteries:Advances and perspectives

在线全文

学校读者我要写书评

暂无评论

Journal of Energy Chemistry 2024年第2期89卷 487-518,I0012页

作者： Qingqing Ruan yuehua qian Mengda Xue Lingyun Chen Qichun Zhang Department of Applied Chemistry School of Chemistry and Chemical EngineeringChongqing UniversityChongqing 401331China Department of Materials Science and Engineering City University of Hong Kong999077Hong KongChina

With the rapid development of rechargeable metal-ion batteries(MIBs)with safety,stability and high energy density,significant efforts have been devoted to exploring high-performance electrode *** recent years,two-dimensional(2D)molybdenum-based(Mo-based)materials have drawn considerable attention due to their exceptional characteristics,including low cost,unique crystal structure,high theoretical capacity and controllable chemical ***,like other transition metal compounds,Mo-based materials are facing thorny challenges to overcome,such as slow electron/ion transfer kinetics and substantial volume changes during the charge and discharge *** this review,we summarize the recent progress in developing emerging 2D Mo-based electrode materials for MIBs,encompassing oxides,sulfides,selenides,*** introducing the crystal structure and common synthesis methods,this review sheds light on the charge storage mechanism of several 2D Mo-based materials by various advanced characterization *** latest achievements in utilizing 2D Mo-based materials as electrode materials for various MIBs(including lithium-ion batteries(LIBs),sodium-ion batteries(SIBs)and zinc-ion batteries(ZIBs))are discussed in ***,the modulation strategies for enhancing the electrochemical performance of 2D Mo-based materials are highlighted,focusing on heteroatom doping,vacancies creation,composite coupling engineering and nanostructure ***,we present the existing challenges and future research directions for 2D Mo-based materials to realize high-performance energy storage systems.

关键词： Molybdenum-based materials Two-dimensional materials Lithium-ion batteries Sodium-ion batteries Zinc-ion batteries

高增压船用柴油机低负荷降低涡轮前排气温度的方案研究

在线全文

学校读者我要写书评

暂无评论

内燃机工程 2018年第4期39卷 29-32,38页

作者：钱跃华朱骏刘博中船动力研究院有限公司上海201206

采用仿真和试验相结合的方法,研究高增压船用柴油机推进特性低负荷降低涡轮前排气温度的方案。通过仿真计算发现,由于受活塞和气门型线的限制,进/排气门正时优化的改善效果不明显;而进/排气旁通可大幅降低涡轮前排气温度,同时改善低负... 详细信息

采用仿真和试验相结合的方法,研究高增压船用柴油机推进特性低负荷降低涡轮前排气温度的方案。通过仿真计算发现,由于受活塞和气门型线的限制,进/排气门正时优化的改善效果不明显;而进/排气旁通可大幅降低涡轮前排气温度,同时改善低负荷下的油耗。进/排气旁通系统在柴油机的试验测试表明其能够大幅降低涡轮前排气温度,最多可达120℃。

关键词：船用柴油机涡轮增压低负荷进/排气旁通

在线全文

学校读者我要写书评

暂无评论

甲醇燃料低速机性能仿真研究

内燃机工程 2023年第4期44卷 1-8页

作者：夏倩刘锋华彭辉钱跃华中船动力研究院有限公司上海201208 上海海洋动力工程技术研究中心上海201208 沪东重机有限公司上海200129 上海中船三井造船柴油机有限公司上海201306

基于某型低速柴油机,利用CONVERGE仿真软件建立了柴油模式缸内燃烧模型,并根据试验数据进行了燃烧模型标定。在标定的柴油模式缸内燃烧模型的基础上,将3个甲醇喷射器和3个引燃柴油喷射器安装在缸盖上,每个甲醇喷射器与引燃柴油喷射器成3... 详细信息

基于某型低速柴油机,利用CONVERGE仿真软件建立了柴油模式缸内燃烧模型,并根据试验数据进行了燃烧模型标定。在标定的柴油模式缸内燃烧模型的基础上,将3个甲醇喷射器和3个引燃柴油喷射器安装在缸盖上,每个甲醇喷射器与引燃柴油喷射器成30°夹角安装,开展了柴油引燃甲醇燃烧模式缸内燃烧模拟,在100%负荷下研究了甲醇喷射器喷孔大小、引燃柴油喷射正时对发动机着火及燃烧过程的影响及与原柴油模式的对比。研究表明:甲醇喷射持续期为25°时,可以得到与原柴油机相近的缸内峰值压力水平;甲醇喷射正时不变的情况下随着引燃油喷射正时的提前角减小,发动机整体性能呈下降趋势,但下降幅度较小。

关键词：甲醇低速机柴油引燃燃烧排放

在线全文

学校读者我要写书评

暂无评论

珍稀药用植物岩黄连的栽培技术

安徽林业科技 2019年第2期45卷 28-30页

作者：钱月华桐城市林业局

岩黄连主要分布在石灰岩山区,生长于岩体缝隙和洞穴边,野生资源稀少。近年来随着岩黄连的药效认识和市场利用不断提高,岩黄连野生资源过度采挖,已濒临灭绝边缘。为满足市场需求,本文根据自己的栽培实践,介绍岩黄连播种育苗、病虫害防治... 详细信息

岩黄连主要分布在石灰岩山区,生长于岩体缝隙和洞穴边,野生资源稀少。近年来随着岩黄连的药效认识和市场利用不断提高,岩黄连野生资源过度采挖,已濒临灭绝边缘。为满足市场需求,本文根据自己的栽培实践,介绍岩黄连播种育苗、病虫害防治等技术,以期对岩黄连的人工种植推广有所裨益。

关键词：岩黄连生物学特性苗木繁育人工栽培

在线全文

学校读者我要写书评

暂无评论

肾上腺无功能肿瘤的超声定位诊断

中华超声影像学杂志 2000年第4期9卷 237-239页

作者：钱月华龚新环上海第二医科大学附属瑞金医院超声科 200025

目的　探讨超声检查对肾上腺无功能肿瘤的诊断价值。方法　对照分析 10 6例肾上腺无功能肿瘤的超声检查和手术病理结果。结果　 10 6例患者中 ,超声诊断真阳性 10 3例 ,真阴性、假阳性、假阴性各 1例 ,敏感性、特异性、准确性分别为 99.... 详细信息

目的　探讨超声检查对肾上腺无功能肿瘤的诊断价值。方法　对照分析 10 6例肾上腺无功能肿瘤的超声检查和手术病理结果。结果　 10 6例患者中 ,超声诊断真阳性 10 3例 ,真阴性、假阳性、假阴性各 1例 ,敏感性、特异性、准确性分别为 99.0 %、5 0 .0 %和 98.1%。肾上腺无功能肿瘤呈逐年增多趋势 ,被超声首次检出者为 77.9%。肿瘤从小到大依次为腺瘤、嗜铬细胞瘤、神经鞘瘤、髓样脂肪瘤、神经节细胞瘤、腺癌。各种肿瘤的大小有极显著性差异。髓样脂肪瘤以高回声为特征 ,易与其他肿瘤鉴别 ,其余肿瘤声像图交叉现象严重。较大的嗜铬细胞瘤、神经鞘瘤常有液化囊变表现 ,腺癌常为不均匀回声。结论　超声检查是肾上腺无功能肿瘤定位诊断首选的可靠的方法 ,并对鉴别肿瘤类型有一定帮助。

关键词：超声检查肾上腺肿瘤诊断

Recent advances in exploring new blood-based biomarkers for the early diagnosis of gastric cancer

在线全文

学校读者我要写书评

暂无评论

Science China Chemistry 2025年第1期68卷 35-45页

作者： Xinyu Peng qian Ma Da Han School of Life Science Shanghai University Institute of Molecular Medicine Shanghai Key Laboratory for Nucleic Acid Chemistry and Nanomedicine State Key Laboratory of Oncogenes and Related Genes Renji Hospital School of Medicine Shanghai Jiao Tong University Department of Research and Development Intellinosis Biotechnologies Co.Ltd.

Gastric cancer(GC) is a prevalent and lethal malignancy worldwide, and the 5-year survival rate is less than 30%. The absence of distinctive symptoms often leads to late-stage diagnosis, contributing to a grim prognosis. Early detection is pivotal for improving the survival rates and outcomes of GC patients. Traditional diagnostic methods, including gastroscopy and histopathological examination, are restricted in the early diagnosis of GC. Conventional protein biomarkers, such as carcinoembryonic antigen(CEA), carbohydrate antigen 19-9(CA19-9), and carbohydrate antigen 72-4(CA72-4), exhibit insufficient sensitivity and specificity for GC screening, which diminishes their clinical value. Recently, novel circulating biomarkers, such as circulating tumor cells(CTCs), circulating tumor cell DNA(ct DNA), and circulating free RNA(cf RNA), have emerged as promising candidates in the burgeoning field of liquid biopsy due to their superior sensitivity and specificity. This review focuses on the latest research on blood-based biomarkers for GC diagnosis and examines the clinical potentials and challenges associated with these emerging biomarkers.

关键词： gastric cancer early diagnosis blood

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

船用低速柴油机实时仿真模型开发及应用

船舶工程 2017年第6期39卷 20-23页

作者：钱跃华龚嫚朱骏中船动力研究院有限公司上海201206

以某型小缸径船用低速柴油机为研究对象,基于该柴油机一维性能模型开展实时仿真模型的快速开发和标定。比较简化后的实时仿真模型与原性能模型的计算时间和仿真精度,应用该模型在硬件在环测试平台上测试新研制的柴油机控制器。试验结果... 详细信息

以某型小缸径船用低速柴油机为研究对象,基于该柴油机一维性能模型开展实时仿真模型的快速开发和标定。比较简化后的实时仿真模型与原性能模型的计算时间和仿真精度,应用该模型在硬件在环测试平台上测试新研制的柴油机控制器。试验结果表明,该模型可正常接收和反馈正确的控制器指令和柴油机运行参数,满足电控系统硬件在环测试的试验要求。

关键词：船用低速柴油机电控系统实时仿真模型硬件在环仿真

在线全文

学校读者我要写书评

暂无评论

内燃机进排气变网格一维非定常流动计算方法

哈尔滨工程大学学报 2022年第6期43卷 809-816,920页

作者：张琨陈昊天邓康耀胡志龙钱跃华刘博上海交通大学动力机械及工程教育部重点实验室上海200240 上海船舶设备研究所上海200031 中国船舶集团有限公司第七一一研究所上海201108 中船动力研究院有限公司上海200120

针对内燃机进排气流动计算模型难以满足在现有计算效率的基础上提高计算精度的问题,本文推导建立了变网格一维非定常流动计算方法。在均匀网格TVD格式基础上,推导建立适用于内燃机进排气流动计算的非均匀网格TVD迭代格式,并结合自适应... 详细信息

针对内燃机进排气流动计算模型难以满足在现有计算效率的基础上提高计算精度的问题,本文推导建立了变网格一维非定常流动计算方法。在均匀网格TVD格式基础上,推导建立适用于内燃机进排气流动计算的非均匀网格TVD迭代格式,并结合自适应网格加密技术,建立可变网格一维非定常流动数值仿真计算方法。结果表明:与采用均匀网格的整机仿真模型相比,采用变网格计算20个循环平均增加CPU计算耗时2.08 s,排气压力波预测精度较均匀网格计算方案最大可提高5.15个百分点,整机性能预测精度较均匀网格最大可提高0.54个百分点。

关键词：内燃机进排气流动变网格 TVD格式一维非定常流动压力波整机性能

同方期刊数据库