检索结果-南通市图书馆

Homogenous coating of Li+ conductive Li5AlO4 on single-crystalline nonstoichiometric Li1.04Ni0.92Al0.04O2 for rechargeable lithium-ion batteries

引用

Journal of Energy Chemistry 2024年第8期95卷 651-659页

作者： Guoyu Ding Shizhou Wang Jinhan Li Ziyan Wu Jiayu Chen Jiayong Du Xinhui Huang Kuiming Liu Yudong Zhang Zhonghan Wu Yiyang Peng qiancheng zhao Meng Yu Fangyi Cheng Key Laboratory of Advanced Energy Materials Chemistry(Ministry of Education) Engineering Research Center of High-efficiency Energy Storage(Ministry of Education) College of Chemistry Nankai University State Key Laboratory of Advanced Chemical Power Sources Nankai University Haihe Laboratory of Sustainable Chemical Transformations

Cobalt-free,nickel-rich LiNi1-xAlxO2（x ≤ 0.1） is an attractive cathode material because of high energy density and low cost but suffers from severe structural degradation and poor rate performance.In this study,we propose a molten salt-assisted synthesis in combination with a Li-refeeding induced aluminum segregation strategy to prepare Li5AlO4-coated single-crystalline slightly Li-rich Li1.04Ni0.92Al0.04O2.The symbiotic formation of Li5AlO4from reaction between molten lithium hydroxide and doped aluminum in the bulk ensures a high lattice matching between the Ni-rich oxide and the homogenous conductive Li5AlO4that permits high Li+conductivity.Benefiting from mitigated undesirable side reactions and phase evolution,the Li5AlO4-coated single-crystalline Li1.04Ni0.92Al0.04O2delivers a high specific capacity of220.2 mA h g-1at 0.1 C and considerable rate capability(182.5 mA h g-1at 10 C).Besides,superior capacity retention of 90.8% is obtained at 1/3 C after 100 cycles in a 498.1 mA h pouch full cell.Furthermore,the particulate morphology of Li1.04Ni0.92Al0.04O2remains intact after cycling at a cutoff voltage of 4.3 V,whereas slightly Li-deficient Li0.98Ni0.97Al0.05O2features intragranular cracks and irreversible lattice distortion.The results highlight the value of molten salt-assisted synthesis and Li-refeeding induced elemental segregation strategy to upgrade Ni-based layered oxide cathode materials for advanced Li-ion batteries.

关键词： Aluminum segregation Cathode materials Molten synthesis Nonstoichiometric oxides Surface coating

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Investigation of Inverter Temperature Prediction Model in Wind Farm Based on SCADA Data

引用

Energy Engineering 2022年第1期119卷 287-300页

作者： Qihui Ling Wei Zhang qiancheng zhao Juchuan Dai Engineering Research Center of Hunan Province for the Mining and Utilization of WTS Operation Data Xiangtan411201China School of Mechanical Engineering Hunan University of Science and TechnologyXiangtan411201China

The inverter is one of the key components of wind turbine,and it is a complex circuit composed of a series of components such as a variety of electronic components and power devices.Therefore,it is difficult to accurately identify the operation states of inverter and some problems regarding its own circuit,especially in the early stages of failure.However,if the inverter temperature prediction model can be established,the early states can be identified through the judgment of the output temperature.Accordingly,considering whether the inverter heats up normally from the perspective of heat dissipation,a method for the early operation state identification of the inverter is provided in this paper.A variable selection method based on fusion analysis of correlation and physical relationship is adopted to extract variables as input variables,which have high correlation with inverter temperature.Then multi-input and multi-output temperature prediction model of inverter is established based on a nonlinear autoregressive exogenous model(NARX)network,and the prediction temperature residual is used as the real-time standard to evaluate the inverter states.For validating this,the validity and reliability of the established temperature prediction model are verified through case analysis,and the performance comparison with various models demonstrates that the proposed method has higher accuracy.The construction method of the prediction model can be used for reference to other aspects of wind turbine.All these bring huge benefits to wind energy industry.

关键词： Wind turbine inverter temperature prediction NARX network SCADA data

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Effects of laser powder bed fusion process parameters on microstructure and hydrogen embrittlement of high-entropy alloy

引用

Journal of Materials Science & Technology 2023年第24期155卷 211-226页

作者： Hongxu Cheng Hong Luo Zhimin Pan Xuefei Wang qiancheng zhao Yu Fu Xiaogang Li National Materials Corrosion and Protection Data Center Institute for Advanced Materials and Technology University of Science and Technology Beijing Beijing 100083 China Key Laboratory for Corrosion and Protection of The Ministry of Education (MOE) Beijing 100083 China

Hydrogen embrittlement behavior, micro-deformation, and crack propagation mechanism of CoCrFeNiMn high-entropy alloy (HEA) fabricated by laser powder bed fusion (LPBF) under different parameters were investigated by slow strain rate tensile tests (at room temperature) with/without electrochemical hydrogen pre-charging. The LPBF CoCrFeNiMn HEA shows excellent resistance to hydrogen embrittlement. Unsuitable LPBF parameters are accompanied by many microcracks and holes, resulting in a slight decrease in the hydrogen embrittlement resistance of the material. The electron backscatter diffraction (EBSD), electron channeling contrast image (ECCI) techniques, and transmission electron microscope (TEM) were carried out to research the main influencing factors of hydrogen on the deformation mechanism and crack propagation. Compared with un-charged samples, a larger number of deformation twins (DTs) appear in the deformation process of hydrogen-charged LPBF CoCrFeNiMn, attributing to the reduction of stacking fault energy (SFE) due to the ingress of hydrogen. The nano DTs and crossing twin system contribute to the extra work hardening, and a strain hardening platform is observed for all hydrogen-charged samples, resulting in the increase of strain hardening rate or the mitigation of the loss of strain hardening. Although unsuitable process parameters will trigger fabrication defects and reduce mechanical properties, the cellular structure can bring a hydrogen-induced strain hardening platform for LPBF CoCrFeNiMn to reduce the damage caused by hydrogen embrittlement.

关键词： Laser powder bed fusion High-entropy alloy Hydrogen embrittlement Deformation mechanism

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Operation State of theWind Turbine Pitch System Based on Fuzzy Comprehensive Evaluation

引用

Energy Engineering 2023年第2期120卷 425-444页

作者： Anfeng Zhu qiancheng zhao LinGui Tianlong Yang Xuebing Yang Engineering Research Center of Hunan Province for the Mining and Utilization of Wind Turbines Operation Data Hunan University of Science and TechnologyXiangtan411201China XEMC Wind Power Co. Ltd.Xiangtan411102China

To ensure wind turbine(WT)safe operations and improve the utilization rate of wind energy,effective evaluation of the operation state of the pitch system is critical.Therefore,a new method was proposed to evaluate the operation state of the pitch system of WT based on fuzzy comprehensive evaluation.Firstly,based on SCADA data,the working state of the pitch system under rated power state and power state of WT were analyzed.Secondly,through the analysis of characteristic parameters and physical mechanism of the pitch system,the consistency principle of characteristic parameters,the stability principle of power under rated state,and the stability principle of blade angle underpowered state were obtained.Next,based on the aforementioned principles,the evaluation indexes were established,and the fuzzy comprehensive evaluation method was used to establish the operation state evaluation model of the pitch system under rated power state and under power state of the WT.Finally,an example was provided to verify the effectiveness of the method.The evaluation model established in this study can be used as a technical reference for the online monitoring of WT pitch systems to ensure the safe and stable operation of WTs.

关键词： Wind turbine(WT) pitch system fuzzy comprehensive evaluation state evaluation

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Power Data Preprocessing Method of Mountain Wind Farm Based on POT-DBSCAN

引用

Energy Engineering 2021年第3期118卷 549-563页

作者： Anfeng Zhu zhao Xiao qiancheng zhao Engineering Research Center of Hunan Province for the Mining and Utilization of Wind Turbines Operation Data Hunan University of Science and TechnologyXiangtan411201China

Due to the frequent changes of wind speed and wind direction,the accuracy of wind turbine(WT)power prediction using traditional data preprocessing method is low.This paper proposes a data preprocessing method which combines POT with DBSCAN(POT-DBSCAN)to improve the prediction efficiency of wind power prediction model.Firstly,according to the data of WT in the normal operation condition,the power prediction model ofWT is established based on the Particle Swarm Optimization(PSO)Arithmetic which is combined with the BP Neural Network(PSO-BP).Secondly,the wind-power data obtained from the supervisory control and data acquisition(SCADA)system is preprocessed by the POT-DBSCAN method.Then,the power prediction of the preprocessed data is carried out by PSO-BP model.Finally,the necessity of preprocessing is verified by the indexes.This case analysis shows that the prediction result of POT-DBSCAN preprocessing is better than that of the Quartile method.Therefore,the accuracy of data and prediction model can be improved by using this method.

关键词： Wind turbine SCADA data data preprocessing method power prediction

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

CD44-Specific Targeting Nanoreactors with Glutathione Depletion for Magnifying Photodynamic Tumor Eradication

引用

CCS Chemistry 2022年第8期4卷 2662-2673页

作者： Chao Shi Xiao Zhou qiancheng zhao Zhen Zhang He Ma Yang Lu Zhibin Huang Wen Sun Jianjun Du Jiangli Fan Xiaojun Peng State Key Laboratory of Fine Chemicals Dalian University of TechnologyDalian 116024 State Key Laboratory of Fine Chemicals Shenzhen Research InstituteDalian University of TechnologyNanshan DistrictShenzhen 518057

Photodynamic therapy(PDT)is an efficacious noninvasive therapeutic modality that utilizes nontoxic photosensitizers(PSs)to transform oxygen into highly cytotoxic reactive oxygen species(ROS)under specific light irradiation.However,low intratumoral accumulation capacity and the reduced ROS production caused by excessive glutathione(GSH,a scavenger of ROS)in the tumor microenvironment(TME)immensely limit PDT therapeutic efficacy.

关键词： NIR photosensitizer CD44-specfic targetability GSH depletion amplified photodynamic therapy tumor eradication

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Open-Circuit Faults Diagnosis in Direct-Drive PMSG Wind Turbine Converter

引用

Energy Engineering 2021年第5期118卷 1515-1535页

作者： Wei Zhang Qihui Ling qiancheng zhao Hushu Wu Engineering Research Center of Hunan Province for the Mining and Utilization of Wind Turbines Operation Data Hunan University of Science and TechnologyXiangtan411201China School of Mechanical Engineering Hunan University of Science and TechnologyXiangtan411201China XEMC Wind Power Co. Ltd.Xiangtan411201China

The condition monitoring and fault diagnosis have been identified as the key to achieving higher availabilities of wind turbines.Numerous studies show that the open-circuit fault is a significant contributor to the failures of wind turbine converter.However,the multiple faults combinations and the influence of wind speed changes abruptly,grid voltage sags and noise interference have brought great challenges to fault diagnosis.Accordingly,concerning the open-circuit fault of converters in direct-driven PMSG wind turbine,a diagnostic method for multiple open-circuit faults is proposed in this paper,which is divided into two tasks:The first one is the fault detection and the second one is the fault localization.The detection method is based on the relative current residuals after exponential transformation and on an adaptive threshold,and the localization method is based on the average values of fault phase currents.The scheduled diagnosis method is available to both the generator-side converter and the grid-side converter,allowing to detect and locate single and double open-circuit faults.For validating this,robustness test and multiple open-circuit faults diagnosis are presented in a 2-MW direct-driven PMSG wind turbine system,the results validate the reliability and effectiveness of the proposed method.

关键词： Wind turbine converter open-circuit fault fault diagnosis exponential transformation

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

老年肌少症及其营养干预研究进展

引用

食品工业科技 2024年第7期45卷 370-377页

作者：郭宇赵前程李莹邱斌刘佳雯大连海洋大学食品科学与工程学院辽宁大连116023 山东省农业科学院农产品加工与营养研究所山东济南250000 枣庄市东粮生物科技发展有限公司山东枣庄277200

肌少症是一种与年龄相关的肌肉质量和功能下降疾病,极大增加了老年人骨折、摔伤和死亡风险。其发病机制主要涉及运动神经元缺失、激素失衡和炎症因子与胰岛素抵抗等因素。补充蛋白质、氨基酸、n-3、n-6多不饱和脂肪酸以及维生素等营养... 详细信息

肌少症是一种与年龄相关的肌肉质量和功能下降疾病,极大增加了老年人骨折、摔伤和死亡风险。其发病机制主要涉及运动神经元缺失、激素失衡和炎症因子与胰岛素抵抗等因素。补充蛋白质、氨基酸、n-3、n-6多不饱和脂肪酸以及维生素等营养素可以有效防治肌少症。文章着重对肌少症的发病机制和营养干预进行了阐述,以期为老年肌少症研究提供参考。

关键词：老年肌少症营养干预蛋白质脂肪酸

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

An electrical-coupling-suppressing MEMS gyroscope with feed-forward coupling compensation and scalable fuzzy control

引用

Science China(Information Sciences) 2017年第4期60卷 180-190页

作者： Chunhua HE Jimeng ZHANG qiancheng zhao Qinwen HUANG Zhenchuan YANG Dacheng ZHANG Guizhen YAN National Key Laboratory of Science and Technology on Micro/Nano Fabrication Institute of Microelectronics Science and Technology on Reliability Physics and Application of Electronic Component Laboratory No.5 Electronics Research Institute of the Ministry of Industry and Information Technology

This paper proposes a novel electrical coupling suppressing and drive closed loop control method for a MEMS gyroscope with feed-forward coupling compensation(FCC) and scalable fuzzy control. Theoretical analysis of the novel method is described in detail, and it is very simple to realize. Experimental results demonstrate that the electrical anti-resonant peaks located at the amplitude-frequency and phase-frequency responses are both eliminated by FCC control, and the height of the amplitude resonant peak increases more than 24 d B over 1800 Hz span. In addition, the overshoot of the transient response with scalable fuzzy control is smaller than 5%, and the settling time is less than 15 ms. The stabilities of the resonant amplitude and phase of the drive-mode velocity with scalable fuzzy control are about 15 ppm and 11 ppm, respectively. The scale factor of the gyroscope is measured to be 33.98 m V/deg/s with nonlinearity about 0.08%. Furthermore, the bias instability of the gyroscope with wavelet analysis is improved to be about 6.3 deg/h from 25.2 deg/h of the gyroscope without wavelet analysis.

关键词： MEMS gyroscope electrical coupling suppressing anti-resonance feed-forward coupling compen sation scalable fuzzy control

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

4种市售即食海参质构特性及营养品质综合评价

引用

食品工业科技 2024年第8期45卷 263-272页

作者：王一帆赵影时佳凝范馨茹赵前程张宇李萌大连海洋大学食品科学与工程学院辽宁大连116023 广东官栈营养健康科技有限公司广东广州510000

为比较不同市售即食海参产品品质,本文以4种来源于大连和福建的常见海参产品(高水分大连即食海参HW-DLS、调味低水分大连即食海参FLW-DLS、低水分大连即食海参LW-DLS、高水分福建即食海参HW-FJS)为研究对象,测定分析其感官、质构、营养... 详细信息

为比较不同市售即食海参产品品质,本文以4种来源于大连和福建的常见海参产品(高水分大连即食海参HW-DLS、调味低水分大连即食海参FLW-DLS、低水分大连即食海参LW-DLS、高水分福建即食海参HW-FJS)为研究对象,测定分析其感官、质构、营养及功能性成分、体外可消化性,并采用主成分分析法进行营养品质综合评价。结果表明,海参产品色泽均较好,但FLW-DLS感官评价的口感更佳;4组海参样品在硬度、弹性、内聚性及咀嚼性方面具有差异;FLW-DLS组的灰分、总糖和盐分含量分别为2.16%、1.7%和1.3%,均显著高于其它海参(P<0.05);FLW-DLS和LW-DLS组的粗蛋白含量高于其他海参;4组海参产品均具有较优氨基酸、脂肪酸组成及良好的动脉粥样硬化(AI)和血栓形成(TI)指数;FLW-DLS和LW-DLS皂苷含量(8.64 mg/kg、8.49 mg/kg)均显著性较高(P<0.05),且前者的牛磺酸含量为2.28 mg/100 g显著性高于其它3组(P<0.05);FLW-DLS组海参经体外消化后,上清蛋白含量为33.58 g/100 g,高于其它3组,具有较好的生物可利用性。基于营养指标进行主成分分析显示,4组海参产品的营养组成差异明显,营养价值评分由高到低依次为FLWDLS?HW-FJS?LW-DLS?HW-DLS。4种市售即食海参产品营养种类齐全,水发程度低且调味的产品相较其他3种更能有效保持海参中的营养价值和口感。

关键词：海参质构营养成分主成分分析综合评价

来源：

维普期刊数据库博看期刊

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：