检索结果-南通市图书馆

Nonlinear Dynamic Modeling for a Diesel Engine Propeller Shafting Used in Large Marines

Chinese Journal of Mechanical Engineering 2014年第5期27卷 937-948页

作者： ZHANG Qinglei duan jianguo ZHANG Suohuai FU Yumin School of Mechanical Engineering University of Shanghai for Science and Technology Central Academe Shanghai Electric Group Co. Ltd School of Mechanical and Automation Engineering Shanghai Institute of Technology

Longitudinal vibration,torsional vibration and their coupled vibration are the main vibration modes of the crankshaft-sliding bearing ***,these vibrations of the propeller-crankshaft-sliding bearing system generated by the fluid exciting force on the propeller are much more ***,the torsional and longitudinal vibrations have been studied separately while the research on their coupled vibration is few,and the influence of the propeller structure to dynamic characteristics of a crankshaft has not been studied *** order to describe the dynamic properties of a crankshaft accurately,a nonlinear dynamic model is proposed taking the effect of torsional-longitudinal coupling and the variable inertia of propeller,connecting rod and piston into *** simulation cases are carried out to calculate the response data of the system in time and frequency domains under the working speed and over-speed,*** of vibration analysis of the propeller and crankshaft system coupled in torsional and longitudinal direction indicate that the system dynamic behaviors are relatively complicated especially in the components of the frequency *** example,the 4 times of an exciting frequency acting on the propeller by fluid appears at 130 r/min,while not yield at 105 r/*** the possible abnormal vibration at over-speed just needs to be *** when designing the propeller shafting used in marine diesel engines,strength calculation and vibration analysis based only on linear model may cause great errors and the proposed research provides some references to design diesel engine propeller shafting used in large marines.

关键词： nonlinear dynamics propeller shafting marine engine numerical simulation

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

Growth mechanisms for spherical Ni_(0.815)Co_(0.15)Al_(0.035)(OH)_(2) precursors prepared via the ammonia complexation precipitation method

引用

Journal of Energy Chemistry 2021年第2期30卷 379-386,I0013页

作者： Xi Yang Xuesong Huang Hancheng Shi Peng Dong Ding Wang jianguo duan Yingjie Zhang Nationl and Localfoint Enginering Laboratory for lithium-ion Batteres and Materials Ppreparation Techmology Key Laboratory of Advanced Batrery Materas of Yunnan ProvinceFaculty of Metalturgical and Energy EngineeringKunming University of Science and TechnologyKurnming 650093YunnanChina

The microstructures of precursors strongly affect the electrochemical performance of Ni-rich layerstructured cathode *** this study,the growth behaviour of Ni_(0.815)Co_(0.15)Al_(0.035)(OH)_2(NCA) prepared via the ammonia complexation precipitation method in a 50-L-volume continuously stirred tank reactor(CSTR) is studied in *** growth of Ni(OH)2-based hydroxide can be divided into a nucleation process,an agglomeration growth process,a process in which multiple growth mechanisms coexist,and an interface growth process over time,while the inner structure of the CSTR can be divided into a nucleation zone,a complex dissolution zone,a growth zone,and a maturation *** concentration of ammonium ions affects the growth habit of the primary crystal significantly due to its specific adsorption on the electronegative crystal *** the ammonia concentration is 2.0 mol L^(-1).The LiNi_(0.815)Co_(0.15)Al_(0.035)O_2 materials inherit the grain structure of the *** prepared from precursors with(1 0 1)preferential primary particles show a higher specific capacity and better rate performance than those that were prepared from(0 0 1) preferential primary particles,but the latter realize a better cycling performance than the former.

关键词： Lithium ion batteries Growth mechanism Spherical agglomerates Mixed hydroxide LiNi_(0.815)Co_(0.15)Al_(0.035)O_(2)

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

Biomass-derived self-supporting sulfur host with NiS/C composite for high-loading Li-S battery cathode

引用

Science China(Technological Sciences) 2023年第1期66卷 181-192页

作者： LIU LuZhi XIA GuangHui WANG Ding HUANG JieMeng duan jianguo ZHANG YiYong DONG Peng ZHANG YingJie National and Local Joint Engineering Laboratory for Lithium-ion Batteries and Materials Preparation Technology Key Laboratory of Advanced Battery Materials of Yunnan ProvinceFaculty of Metallurgical and Energy EngineeringKunming University of Science and TechnologyKunming 650093China College of Materials Science and Engineering Sichuan UniversityChengdu 610065China

High sulfur loading is a practical way to realize the advantages of high energy density lithium-sulfur(Li-S)***,we report a biomass-derived flexible self-supporting carbon(SSC)coupled with Ni S/C used as a sulfur host for high-efficiency sulfur storage.A high areal sulfur loading of 5.3 mg cm-2can be achieved in the as-prepared composite host,and physical/chemical dual blocking effects for polysulfides are implemented in the SSC-Ni S/C *** 3D SSC with an interwoven structure offers a large surface area and wide internal space for sulfur ***,the powerful capability of physical immobilization/chemical anchoring of the polysulfides endowed by SSC and Ni S mitigates the shuttle *** compared electrodes with different current collectors,and the SSC-Ni S/C-1200 electrode material showed outstanding electrochemical performance,exhibiting a first specific capacity of 1268.36 m A h g-1at a high sulfur loading of 5.3 mg ***,the SSC-Ni S/C-1200 electrode exhibited a good remaining capacity of 555.15 m A h g-1at a current density of0.5 A g-1with a high sulfur loading of 3.3 mg cm-2after 300 *** addition,the active material loaded in the traditional way easily falls off when the conventional current collector is folded with increasing sulfur loading,but the flexible self-supporting carbon current collector can solve this *** study prepared a flexible free-standing 3D interconnected carbon current *** the introduction of amorphous carbon-coated Ni S,the self-supporting cathode SSC-Ni S/C-1200 achieved high sulfur loading that results in excellent electrochemical performance,providing a reference for future research on high sulfur loading in lithium-sulfur batteries.

关键词： lithium-sulfur batteries current collector biomass-derived carbon high sulfur loading cycling stability

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

Non-solvating fluorosulfonyl carboxylate enables temperature-tolerant lithium metal batteries

引用

Journal of Energy Chemistry 2023年第7期82卷 287-295,I0007页

作者： Xianshu Wang Junru Wu Yun Zhao Bin Li Naser Tavajohi Qi Liu jianguo duan Ding Wang Peng Dong Yingjie Zhang Baohua Li National and Local Joint Engineering Research Center for Lithium-ion Batteries and Materials Preparation Technology Key Laboratory of Advanced Battery Materials of Yunnan ProvinceFaculty of Metallurgical and Energy EngineeringKunming University of Science and TechnologyKunming 650093YunnanChina Tsinghua Shenzhen International Graduate School Tsinghua UniversityShenzhen 518055GuangdongChina School of Materials Science and Engineering Tsinghua UniversityBeijing 100084China School of Chemistry and Materials Engineering Huizhou UniversityHuizhou 516007GuangdongChina Department of Chemistry UmeåUniversityUmeå90187Sweden College of Materials Science and Engineering Hunan UniversityChangsha 410082HunanChina

Advanced electrolyte engineering is an important strategy for developing high-efficacy lithium(Li)metal batteries(LMBs).Unfortunately,the current electrolytes limit the scope for creating batteries that perform well over temperature ***,we present a new electrolyte design that uses fluorosulfonyl carboxylate as a non-solvating solvent to form difluoroxalate borate(DFOB-)anion-rich solvation sheath,to realize high-performance working of temperature-tolerant *** this optimized electrolyte,favorable SEI and CEI chemistries on Li metal anode and nickel-rich cathode are achieved,respectively,leading to fast Li^(+)transfer kinetics,dendrite-free Li deposition and suppressed electrolyte ***,Li||LiNi_(0.80)Co_(0.15)Al_(0.05)O_(2)batteries with a thin Li foil(50μm)show a long-term cycling lifespan over 400 cycles at 1C and a superior capacity retention of 90%after 200 cycles at 0.5C under 25℃.Moreover,this electrolyte extends the operating temperature from-10 to 30℃and significantly improve the capacity retention and Coulombic efficiency of batteries are improved at high temperature(60℃).Fluorosulfonyl carboxylates thus have considerable potential for use in high-performance and allweather LMBs,which broadens the new exploring of electrolyte design.

关键词： Lithium metal batteries Methyl fluorosulfonyldifluoroacetate Non-solvating Anion-rich solvation Temperature tolerance

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

Residual alkali-evoked cross-linked polymer layer for anti-air-sensitivity LiNi_(0.89)Co_(0.06)Mn_(0.05)O_(2)cathode

引用

Journal of Energy Chemistry 2024年第5期92卷 450-458页

作者： Chao Zhao Xuebao Li Yun Zhao Jingjing He Yuanpeng Cao Wei Luo Ding Wang jianguo duan Xianshu Wang Baohua Li National and Local Joint Engineering Research Center of Lithium-ion Batteries and Materials Preparation Technology Key Laboratory of Advanced Battery Materials of Yunnan ProvinceFaculty of Metallurgical and Energy EngineeringKunming University of Science and TechnologyKunming 650093YunnanChina School of Materials Science and Engineering Central South UniversityChangsha 410083HunanChina Institute of Materials Research Tsinghua Shenzhen International Graduate SchoolTsinghua UniversityShenzhen 518055Guangdong China City College Kunming University of Science and TechnologyKunming 650051YunnanChina

High-energy density lithium-ion batteries(LIBs)with layered high-nickel oxide cathodes(LiNi_(x)Co_(y)Mn_(1-x-y)O_(2),x≥0.8)show great promise in consumer electronics and vehicular ***,LiNi_(x)Co_(y)Mn_(1-x-y)O_(2)faces challenges related to capacity decay caused by residual alkalis owing to high sensitivity to *** address this issue,we propose a hazardous substances upcycling method that fundamentally mitigates alkali content and concurrently induces the emergence of an anti-air-sensitive layer on the cathode *** the neutralization of polyacrylic acid(PAA)with residual alkalis and then coupling it with 3-aminopropyl triethoxysilane(KH550),a stable and ion-conductive cross-linked polymer layer is in situ integrated into the LiNi_(0.89)Co_(0.06)Mn_(0.05)O_(2)(NCM)*** characterization and measurements demonstrate its *** NCM material exhibits impressive cycling performance,retaining 88.4%of its capacity after 200 cycles at 5 C and achieving an extraordinary specific capacity of 170.0 mA h g^(-1) at 10 ***,this layer on the NCM efficiently suppresses unfavorable phase transitions,severe electrolyte degradation,and CO_(2)gas evolution,while maintaining commendable resistance to air *** surface modification strategy shows widespread potential for creating air-stable LiNi_(x)Co_(y)Mn_(1-x-y)O_(2)cathodes,thereby advancing high-performance LIBs.

关键词： Lithium-ion batteries Nickel-rich layered cathode Residual alkalis Cross-linked polyme rmodification Airsensitivity

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

A GLIMPSE OF JINCI TEMPLE COMPLEX

引用

China & The World Cultural Exchange 2007年第10期73卷 38-40页

作者： duan jianguo & Xin Yuan

Jinci is a temple and garden complex situated at the foot of Xuanweng Hill, 25 kilometers southeast of Taiyuan, capital city of northern Shanxi Province. Jin refers to River Jin while Ci means an ancestral hall or tem... 详细信息

关键词：寺庙宗教文化太原市山西晋祠

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

Research Progress in the Treatment of Poststroke Depression with Traditional Chinese Medicine

Research and Inheritance of Traditional Chinese Medicine

引用

Research and Inheritance of Traditional Chinese Medicine 2024年第1期2卷 33-37页

作者： jianguo duan Yuan Ding Yating Shao The First Clinical Medical College of Heilongjiang University of Traditional Chinese Medicine

In recent years,the incidence rate of stroke has increased year by *** stroke depres‐sion is one of its main complications,which seriously affects the recovery of physiological functions and quality of life of stroke *** Chinese medicine has signifi‐cant therapeutic effects in treating this *** article provides a classification and review of traditional Chinese medicine treatment methods for post-stroke depression,and looks forward to the current problems.

关键词： traditional Chinese medicine post stroke depression research progress

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

Pricing decision of green supply chain under the game competition of duopolistic retailers

引用

Journal of Southeast University(English Edition) 2020年第4期36卷 465-474页

作者： Zhang Qinglei Yang Jixing duan jianguo Qin Jiyun School of Logistics Science and Engineering Shanghai Maritime University Shanghai 201306 China

In order to evaluate the impact of green production introduced by the manufacturer and study the competitive strategy between two retailers,four strategic models among diverse retailers,i.e.,Cournot,Stackelberg and two cases of collusion,are *** optimal decision is obtained by the game theory and numerical *** results indicate that the manufacturer's marginal profitability is no less than that of the two ***,due to the manufacturer's green cost,the downstream profitability of the supply chain may exceed the upstream manufacturer's *** retailers'Cournot behavior causes the manufacturer to acquire the highest profitability and set the highest green ***,there is an opposite result in *** retailers will choose Cournot pricing when the consumer's green sensitivity is higher than a *** consumers are more sensitive to the price difference of products,retailers prefer collusion,and then choose the Stackelberg ***'profitability will increase as competition among retailers *** competition allows two duopolistic retailers to acquire a higher profitability.

关键词： green supply chain duopolistic retailers competitive strategy game theory

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

基于时间向量的多工序加工系统工艺路线重组建模与优化

引用

计算机集成制造系统 2020年第7期26卷 1814-1823页

作者：段建国王彦森谢楠上海海事大学中国(上海)自贸区供应链研究院上海201306 上海海事大学物流工程学院上海201306 同济大学中德工程学院上海201804

为增强工艺知识的重用性,提高工艺规划的柔性和动态适应性,提出基于时间向量和矩阵的多工序加工系统工艺路线重组建模与优化方法。通过分析多工序的共同作用因素及工序间复杂的耦合关系,构建了基于简单插入操作的惩罚时间矩阵、换刀时... 详细信息

为增强工艺知识的重用性,提高工艺规划的柔性和动态适应性,提出基于时间向量和矩阵的多工序加工系统工艺路线重组建模与优化方法。通过分析多工序的共同作用因素及工序间复杂的耦合关系,构建了基于简单插入操作的惩罚时间矩阵、换刀时间向量、定位时间向量、装夹时间向量、旋转时间向量和加工时间矩阵。在此基础上,以非切削加工时间和空闲时间最小为目标,建立了多工序加工系统工艺路线重组模型,设计了工艺路线整数线性优化重组算法。通过汽车发动机缸盖加工工艺优化重组,验证了该模型和优化算法的有效性。

关键词：多工序加工系统时间向量工艺路线重组建模与优化汽车发动机缸盖

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

Three-dimensional visualization interactive system for digital twin workshop

引用

Journal of Southeast University(English Edition) 2021年第2期37卷 137-152页

作者： Zhang Qinglei Yang Zhiwei duan jianguo Liu Zhen Qin Jiyun School of Logistics Engineering Shanghai Maritime University Shanghai 201306 China

To improve the human-physical-virtual coordination and integration of the digital twin workshop,3D visual monitoring and human-computer interaction of the digital twin workshop was ***,a novel 6D model of the 3D visualization interactive system for digital twin workshops is *** the traditional 5D digital twin model ignores the importance of human-computer interaction,a new dimension of the user terminal was added.A hierarchical real-time data-driven mapping model for the workshop production process is then ***,a real-time data acquisition method for the industrial Internet of things is proposed based on OPC UA(object linking and embedding for process control unified architecture).Based on the 6D model of the system,the process of creating a 3D visualization virtual environment based on virtual reality is introduced,in addition to a data-driven process based on the data management cloud ***,the 6D model of the system was confirmed using the blade rotor test workshop as the object,and a 3D visualization interactive system is *** results show that the system is more transparent,real-time,data-driven and more efficient,as well as promotes the coordination and integration of human-physical-virtual,which has practical significance for developing digital twin workshops.

关键词： digital twin workshop three-dimensional visualization human-computer interaction data driven OPC UA(object linking and embedding for process control unified architecture)

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

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：