检索结果-南通市图书馆

CSEE Journal of Power and Energy Systems 2024年第2期10卷 518-529页

作者： Lianyong Zuo shengshi wang Yong Sun Shichang Cui Jiakun Fang Xiaomeng Ai Baoju Li Chengliang Hao Jinyu Wen State Key Laboratory of Advanced Electromagnetic Technology School of Electrical and Electronic EngineeringHuazhong University of Science and TechnologyWuhan 430073China State Grid Jilin Electric Power Company Changchun 130021China

Fossil fuel depletion and environmental pollution problems promote development of renewable energy(RE)*** increasing penetration of RE,operation security and economy of power systems(PS)are greatly impacted by fluctuation and intermittence of renewable *** this paper,information gap decision theory(IGDT)is adapted to handle uncertainty of wind power *** on conventional IGDT method,linear regulation strategy(LRS)and robust linear optimization(RLO)method are integrated to reformulate the model for rigorously considering security *** a robustness assessment method based on hybrid RLO-IGDT approach is proposed for analyzing robustness and economic performance of ***,a risk-averse linearization method is adapted to convert the proposed assessment model into a mixed integer linear programming(MILP)problem for convenient optimization without robustness ***,results of case studies validate superiority of proposed method in guaranteeing operation security rigorously and effectiveness in assessment of RSR for PS without *** Terms-Hybrid RLO-IGDT approach,information gap decision theory(IGDT),operation security,robustness assessment,robustness security region(RSR).

关键词： IGDT approach information gap decision theory(IGDT) operation security robustness assessment robustness security region(RSR)

基于压力约束重构的多批次成品油管网计划-运行联合优化模型

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

电工技术学报 2023年第S1期38卷 32-43页

作者：刘晶冠艾小猛方家琨崔世常王盛世强电磁工程与新技术国家重点实验室(华中科技大学) 武汉430074

成品油管网具有多批次顺序输送特性,其管道网络参数为连续时变变量,导致压力约束中存在多个连续时变变量相乘项,具有很强的非线性。为此,该文借鉴流体力学中描述流体运动的思路,首先,将建模视角从传统基于欧拉法的管网视角切换到基于拉... 详细信息

成品油管网具有多批次顺序输送特性,其管道网络参数为连续时变变量,导致压力约束中存在多个连续时变变量相乘项,具有很强的非线性。为此,该文借鉴流体力学中描述流体运动的思路,首先,将建模视角从传统基于欧拉法的管网视角切换到基于拉格朗日法的批次视角对模型进行等价重构以降低非线性;然后,综合大M法、分段线性化和二维凸组合等多种线性化技术进一步消除非线性,将非线性模型转换为易于求解的混合整数线性规划模型;最后,进行算例分析,结果表明所提模型较现有模型更能反映管网的复杂工况,在确保运输安全的同时提高经济性,其中电力成本降低27.95%,平均近似误差从19.74%降低至0.61%。

关键词：多批次输送线性化技术电力成本输油节能

Exploitable magnetic anisotropy and half-metallicity controls in multiferroic van der Waals heterostructure

在线全文

学校读者我要写书评

暂无评论

npj Computational Materials 2023年第1期9卷 60-70页

作者： Yaping wang Xinguang Xu Weixiao Ji shengshi Li Yanlu Li Xian Zhao State Key Lab of Crystal Materials and Institute of Crystal Materials Shandong UniversityJinan 250100China Spintronics Institute University of JinanJinan 250022China Center for Optics Research and Engineering of Shandong University Shandong UniversityQingdao 266237China

Two-dimensional(2D)XY ferromagnets have drawn pronounced interest in recent years,but the characteristic of easy-plane magnetization restricts their application in spintronics to some ***,we propose a general strategy for constructing multiferroic van der Waals heterostructures,aiming to achieve electrical control over the magnetic anisotropy in 2D XY *** validity of this strategy is verified by the heterostructure composed of ferromagnetic VBi_(2)Te_(4) and ferroelectric In_(2)Se_(3) *** manipulating the polarized states of In_(2)Se_(3),the VBi_(2)Te_(4) can be reversibly transformed between 2D XY and Heisenberg ferromagnets,characterized by the switching of easy magnetization axis between in-plane and out-of-plane *** interestingly,accompanied by the changes in magnetic anisotropy,the VBi_(2)Te_(4) also demonstrates a phase transition from a semiconductor to a half-metal state,which can be ascribed to the band alignment and interfacial charge *** switchable magnetic and electronic properties enable the heterostructure to be utilized in nonvolatile memory and logic ***,the half-metallicity and magnetocrystalline anisotropy energy of the heterostructure can be effectively tuned by biaxial *** findings not only pave the way for electrically nonvolatile control of 2D XY ferromagnet,but also facilitate the development of interfacial magnetoelectric physics and applications.

关键词： anisotropy metallic magnetic

Magnetic tuning in a novel half-metallic Ir_(2)TeI_(2) monolayer

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 Semiconductors 2022年第5期43卷 70-78页

作者： Didi Zhao Chenggong Zhang Changwen Zhang Weixiao Ji shengshi Li Peiji wang School of Physics and Technology Spintronics InstituteUniversity of JinanJinan 250022China

A two-dimensional(2D) high-temperature ferromagnetic half-metal whose magnetic and electronic properties can be flexibly tuned is required for the application of new spintronics devices. In this paper, we predict a stable Ir_(2)TeI_(2) monolayer with half-metallicity by systematical first-principles calculations. Its ground state is found to exhibit inherent ferromagnetism and strong out-of-plane magnetic anisotropy of up to 1.024 meV per unit cell. The Curie temperature is estimated to be 293 K based on Monte Carlo simulation. Interestingly, a switch of magnetic axis between in-plane and out-of-plane is achievable under hole and electron doping, which allows for the effective control of spin injection/detection in such 2D systems. Furthermore, the employment of biaxial strain can realize the transition between ferromagnetic and antiferromagnetic states. These findings not only broaden the scope of 2D half-metal materials but they also provide an ideal platform for future applications of multifunctional spintronic devices.

关键词： two-dimensional materials spintronics half-metal magnetic anisotropy energy

Semantic information processing in industrial networks

在线全文

学校读者我要写书评

暂无评论

The Journal of China Universities of Posts and Telecommunications 2022年第1期29卷 41-49页

作者： Yao shengshi wang Sixian Dai Jincheng Niu Kai Xu Wenjun Zhang Ping The Key Laboratory of Universal Wireless Communications(Ministry of Education) Beijing University of Posts and TelecommunicationsBeijing 100876China The Peng Cheng Laboratory Nanshan DistrictShenzhen 518052China The State Key Laboratory of Networking and Switching Technology Beijing University of Posts and TelecommunicationsBeijing 100876China

The industrial Internet of things(industrial IoT, IIoT) aims at connecting everything, which poses severe challenges to existing wireless communication. To handle the demand for massive access in future industrial networks, semantic information processing is integrated into communication systems so as to improve the effectiveness and efficiency of data transmission. The semantic paradigm is particularly suitable for the purpose-oriented information exchanging scheme in industrial networks. To illustrate its applicability, typical industrial data are investigated, i.e., time series and images. Simulation results demonstrate the superiority of semantic information processing, which achieves a better rate-utility tradeoff than conventional signal processing.

关键词： semantic information semantic communication industrial Internet of things signal processing

超声波处理对花生萌发及芽苗中黄酮质量比的影响

在线全文

学校读者我要写书评

暂无评论

集美大学学报（自然科学版） 2024年第1期29卷 16-23页

作者：许先猛龙圣世朱晴云王俊钢亳州学院生物与食品工程系安徽亳州236800 亳州市天然产物分离纯化工程技术研究中心安徽亳州236800

为促进花生芽苗中黄酮的富集,以‘鲁花1号’花生种子为原料,采用超声波处理方法,研究超声功率、超声温度和超声时间对花生芽苗黄酮的富集作用。结果表明,当超声功率小于200 W时,超声波处理对于花生种子发芽和花生芽苗富集黄酮作用不显著... 详细信息

为促进花生芽苗中黄酮的富集,以‘鲁花1号’花生种子为原料,采用超声波处理方法,研究超声功率、超声温度和超声时间对花生芽苗黄酮的富集作用。结果表明,当超声功率小于200 W时,超声波处理对于花生种子发芽和花生芽苗富集黄酮作用不显著(P>0.05);当超声功率为300 W处理花生种子,花生种子发芽和花生芽苗富集黄酮作用显著增加(P<0.05),但继续增大超声功率,花生芽苗中黄酮质量比又逐渐降低。花生种子经质量分数为0.5%KMnO_(4)消毒后,在超声功率为300 W、超声温度为30℃的条件下处理15 min,然后在30℃条件下用蒸馏水浸种6 h,最后在温度为27℃、相对湿度为(85±5)%的发芽箱中避光培养7 d,花生芽中的黄酮质量比为5.883 mg/g,显著高于对照组的黄酮质量比(P<0.05)。可见,采用适宜温度、短时间、低功率的超声波处理花生种子,可以促进花生种子发芽和花生芽苗黄酮的富集。

关键词：黄酮 ‘鲁花1号’ 花生芽苗超声波富集作用

Switchable half-metallicity in A-type antiferromagnetic NiI_(2)bilayer coupled with ferroelectric In_(2)Se_(3)

在线全文

学校读者我要写书评

暂无评论

npj Computational Materials 2022年第1期8卷 2091-2098页

作者： Yaping wang Xinguang Xu Xian Zhao Weixiao Ji Qiang Cao shengshi Li Yanlu Li State Key Lab of Crystal Materials and Institute of Crystal Materials Shandong University250100JinanChina Center for Optics Research and Engineering of Shandong University Shandong University266237QingdaoChina Spintronics Institute University of Jinan250022JinanChina

Electrically controlled half-metallicity in antiferromagnets is of great significance for both fundamental research and practical ***,by constructing van der Waals heterostructures composed of two-dimensional(2D)A-type antiferromagnetic NiI_(2)bilayer(bi-NiI_(2))and ferroelectric In_(2)Se_(3)with different thickness,we propose that the half-metallicity is realizable and switchable in the bi-NiI_(2)proximate to In_(2)Se_(3)bilayer(bi-In_(2)Se_(3)).The polarization flipping of the bi-In_(2)Se_(3)successfully drives transition between half-metal and semiconductor for the bi-NiI_(2).This intriguing phenomenon is attributed to the joint effect of polarization field-induced energy band shift and interfacial charge ***,the easy magnetization axis of the bi-NiI_(2)is also dependent on the polarization direction of the bi-In_(2)Se_(3).The half-metallicity and magnetic anisotropy energy of the bi-NiI_(2)in heterostructure can be effectively manipulated by *** findings provide not only a feasible strategy to achieve and control half-metallicity in 2D antiferromagnets,but also a promising candidate to design advanced nanodevices.

关键词： polarization metallic ferroelectric

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

马铃薯挖掘机悬挂架的静力学分析与优化设计

中国工程机械学报 2017年第1期15卷 42-46,56页

作者：李祥王春光邓伟刚谢胜仕王晓蓉内蒙古农业大学机电工程学院呼和浩特010018

针对马铃薯挖掘机试验过程中悬挂架的变形,利用三维建模软件Pro/E对机具悬挂架进行参数化建模,利用ANSYS Workbench有限元分析软件获得悬挂装置的应力与变形大小.将悬挂架的结构尺寸作为设计变量进行响应面优化,通过试验设计(DOE)的方... 详细信息

针对马铃薯挖掘机试验过程中悬挂架的变形,利用三维建模软件Pro/E对机具悬挂架进行参数化建模,利用ANSYS Workbench有限元分析软件获得悬挂装置的应力与变形大小.将悬挂架的结构尺寸作为设计变量进行响应面优化,通过试验设计(DOE)的方法确定17组设计方案,根据Kriging算法建立优化目标与设计变量之间的响应面,采用多目标遗传算法进行优化,得到最优的设计方案.通过优化设计前后的对比分析表明:悬挂连接板的厚度对变形的影响较大,增加悬挂连接板厚度的50%,能够有效减小变形;悬挂连接板的长度对变形影响较小;对优化后的方案进行有限元分析直观地反映了此优化方案满足设计、使用要求.该分析优化方法对机具可靠性的分析设计提供了指导,同时为后续的设计工作奠定了基础.

关键词：马铃薯挖掘机悬挂装置遗传算法试验设计优化

深部构造区大倾角工作面回撤致冲机理及防治技术

在线全文

学校读者我要写书评

暂无评论

煤矿安全 2024年第3期55卷 127-138页

作者：梁文昭刘国磊郑寓超王峰孟圣师崔嵛马秋峰山东理工大学资源与环境工程学院山东淄博255022 山东万祥矿业有限公司潘西煤矿山东济南271104 山东能源集团鲁西矿业有限公司郭屯煤矿山东菏泽274704

深部构造区大倾角工作面回撤期间冲击风险较高,为研究回撤期间致冲机理及防治技术,以潘西煤矿6199工作面为背景,采用理论分析、数值模拟,结合现场数据开展研究。结果表明:工作面受多因素影响处于复杂高静载环境,上部基本顶尖角区剪应力... 详细信息

深部构造区大倾角工作面回撤期间冲击风险较高,为研究回撤期间致冲机理及防治技术,以潘西煤矿6199工作面为背景,采用理论分析、数值模拟,结合现场数据开展研究。结果表明:工作面受多因素影响处于复杂高静载环境,上部基本顶尖角区剪应力集中明显,工作面液压支架撤离,上覆岩层压力向工作面前方转移,局部超过极限载荷可能发生高静载加载型冲击,基本顶破断及断层活化产生动载,可能诱发动静载叠加型冲击;根据回撤前矿压数据,前方岩层活动较为剧烈,工作面微震预警事件发生前后支架阻力升高,存在基本顶破断及断层活化可能,冲击风险较高。基于回撤致冲机理提出卸压-支护协同防冲技术,即通过弱化高静载影响,降低动载产生可能性,辅助提高顺槽支护强度、控制工作面顶板降低回撤期间冲击风险;工作面回撤期间矿压监测数据无明显升高,卸压-支护协同防冲技术效果较好。

关键词：深部构造区大倾角工作面工作面回撤致冲机理冲击地压防治

Tuning the electron transport behavior at Li/LATP interface for enhanced cyclability of solid-state Li batteries

在线全文

学校读者我要写书评

暂无评论

Nano Research 2023年第1期16卷 1634-1641页

作者： Linshan Luo Feng Zheng Haowen Gao Chaofei Lan Zhefei Sun Wei Huang Xiang Han Ziqi Zhang Pengfei Su Peng wang shengshi Guo Guangyang Lin Jianfang Xu Jianyuan wang Jun Li Cheng Li Qiaobao Zhang Shunqing Wu Ming-Sheng wang Songyan Chen Department of Physics Collaborative Innovation Center for Optoelectronic Semiconductors and Efficient DevicesKey Laboratory of Low Dimensional Condensed Matter Physics(Department of Education of Fujian Province)Jiujiang Research InstituteXiamen UniversityXiamen 361005China State Key Lab of Physical Chemistry of Solid Surfaces College of MaterialsXiamen UniversityXiamen 361005China College of Materials Science and Engineering Nanjing Forestry UniversityNanjing 210037China Western Digital Corporation 951 Sandisk DrMilpitasCA 95035USA

An interlayer is usually employed to tackle the interfacial instability issue between solid electrolytes(SEs)and Li metal caused by the side ***,the failure mechanism of the ionic conductor interlayers,especially the influence from electron penetration,remains largely ***,using Li1.3Al0.3Ti1.7(PO4)3(LATP)as the model SE and LiF as the interlayer,we use metal semiconductor contact barrier theory to reveal the failure origin of Li/LiF@LATP interface based on the calculation results of density functional theory(DFT),in which electrons can easily tunnel through the LiF grain boundary with F vacancies due to its narrow barrier width against electron injection,followed by the reduction of ***,an Al-LiF bilayer between Li/LATP is found to dramatically promote the interfacial stability,due to the highly increased barrier width and homogenized electric field at the ***,the Li symmetric cells with Al-LiF bilayer can exhibit excellent cyclability of more than 2,000 h superior to that interlayered by LiF monolayer(~860 h).Moreover,the Li/Al-LiF@LATP/LiFePO4 solid-state batteries deliver a capacity retention of 83.2%after 350 cycles at 0.5 *** findings emphasize the importance of tuning the electron transport behavior by optimizing the potential barrier for the interface design in high-performance solid-state batteries.

关键词： solid-state electrolyte Li metal LiF Al electron transport interfacial barrier