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Experimental and Modeling Study of the Regular Polygon Angle-spiral Liner in Ball Mills

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Chinese Journal of Mechanical Engineering 2017年第2期30卷 363-372页

作者： Yi SUN man liang Xiaohang JIN Pengpeng JI Jihong SHAN College of Mechanical Engineering Zhejiang University of TechnologyHangzhou 310014China

Load behavior is one of the most critical factors affecting mills＇ energy consumption and grinding efficiency, and is greatly affected by the liner profiles. Generally, as liner profiles vary, the ball mill performances are extremely different. In order to study the performance of the ball mill with regular polygon angle-spiral liners（RPASLs）, experimental and numerical studies on three types of RPASLs, including regular quadrilateral, pentagonal and hexagonal, are carried out. For the fine product of desired size, two critical parameters are analyzed： the energy input to the mill per unit mass of the fine product, E＊, and the rate of production of the fine product, F＊. Results show that the optimal structure of RPASLs is Quadrilateral ASL with an assembled angle of 50°. Under this condition, the specific energy consumption E＊ has the minimum value of 303 J per fine product and the production rate F＊ has the maximum value of 0.323. The production rate F＊ in the experimental result is consistent with the specific collision energy intensity to total collision energy intensity ratio Es/Et in the simulation. The relations between the production rate F＊ and the specific energy consumption E＊ with collision energy intensity Es and Et are obtained. The simulation result reveals the essential reason for the experimental phenomenon and correlates the mill performance parameter to the collision energy between balls, which could guide the practical application for Quadrilateral ASL.

关键词： Load behavior Regular polygon angle-spiral liner (RPASL) Particle size distribution. Rate of production of fine product Energy consumption. Collision energy intensity

Real Heat Flux Analysis of Continuously Casting Round Billet

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Journal of Iron and Steel Research International 2008年第1期15卷 25-29页

作者： ZHAN Hui-ying WANG Xu-dong GUO liang-liang YAO man School of Material Science and Engineering Dalian University of Technology Dalian 116024 Liaoning China

The distributions of heat flux along the height and the circumferential direction of round billet mould were measured *** influence of casting speed,carbon content,powder,and pouring temperature on the average longitudinal and circumferential heat flux in the ＂high heat flux region＂ was *** experimental and analytical results provide a basis for an intelligent mould with online detection of defects,adjustment of operational parameters,optimization of the monitoring system,and even prediction of abnormal heat transfer.

关键词： continuous casting mould heat flux round billet

Methcathinone Increases Visually-evoked Neuronal Activity and Enhances Sensory Processing Efficiency in Mice

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Neuroscience Bulletin 2023年第4期39卷 602-616页

作者： Jun Zhou Wen Deng Chen Chen Junya Kang Xiaodan Yang Zhaojuan Dou Jiancheng Wu Quancong Li man Jiang man liang Yunyun Han Department of Neurobiology School of Basic Medicine and Tongji Medical CollegeHuazhong University of Science and TechnologyWuhan430030China Institute for Brain Research Collaborative Innovation Center for Brain ScienceHuazhong University of Science and TechnologyWuhan430030China Department of Forensic Medicine Tongji Medical CollegeHuazhong University of Science and TechnologyWuhan430030China Department of Physiology School of Basic Medicine and Tongji Medical CollegeHuazhong University of Science and TechnologyWuhan430030China Key Laboratory of Forensic Toxicology Ministry of Public SecurityBeijing100192China

Methcathinone(MCAT)belongs to the designer drugs called synthetic cathinones,which are abused worldwide for recreational *** has strong stimulant effects,including enhanced euphoria,sensation,alertness,and ***,little is known about how MCAT modulates neuronal activity in ***,we evaluated the effect of MCAT on neuronal activity with a series of functional approaches.C-Fos immunostaining showed that MCAT increased the number of activated neurons by 6-fold,especially in sensory and motor cortices,striatum,and midbrain motor *** vivo single-unit recording and two-photon Ca^(2+) imaging revealed that a large proportion of neurons increased spiking activity upon MCAT ***,MCAT induced a strong de-correlation of population activity and increased trial-to-trial reliability,specifically during a natural movie *** improved the information-processing efficiency by enhancing the single-neuron coding capacity,suggesting a cortical network mechanism of the enhanced perception produced by psychoactive stimulants.

关键词： Methcathinone Synthetic psychoactive substance In vivo single-unit recording Ca^(2+)imaging Nucleus accumbens Visual cortex

Opportunities and challenges of strain engineering for advanced electrocatalyst design

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Nano Research 2023年第7期16卷 8655-8669页

作者： Qing-man liang Xinchang Wang Xin-Wang Wan Long-Xing Lin Bi-Jun Geng Zhong-Qun Tian Yang Yang Department of Physics Pen-Tung Sah Institute of Micro-Nano Science and TechnologyState Key Laboratory of Physical Chemistry of Solid SurfacesXiamen UniversityXiamen 361005China

Electrocatalysis is becoming more and more important in energy conversion and storage due to rising energy demands,increasing carbon dioxide emissions,and impending climate *** design and synthesis of high-performance electrocatalysts are the spotlights of *** many design methodologies reported,strain engineering has gained growing attention because it can change the atomic arrangement and lattice structure of ***,strain engineering remains to be problematic in regulating the properties of *** review discusses the strain effect tactics to regulate metal and non-metal electrocatalysts,including three sections focusing on strain categorization,strain regulation mechanism,and applications in electrocatalysis,***,the current challenges and an outlook of strain engineering are discussed.

关键词： electrocatalysis electrocatalyst design strain engineering categorization and mechanism applications in electrocatalysis

Smith-Purcell radiation improved by multi-grating structure

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Chinese Physics B 2022年第4期31卷 320-325页

作者： Jing Shu Ping Zhang man liang Sheng-Peng Yang Shao-Meng Wang Yu-Bin Gong School of Electronic Science and Engineering University of Electronic Science and Technology of ChinaChengdu 610054China

The photonic crystal structure has attracted much attention due to its ability to confine *** this paper,we present our study on an improved Smith-Purcell radiation from a simple metal photonic crystal excited by moving *** from the wide-band Smith-Purcell radiation from a single metal grating,the results show that the injected electrons could induce more dipole oscillations inside the multi-grating structure,and it leads to the enhancement of the radiation *** addition,there are strong resonances in metal multi-grating structure,and the resonance characteristics may narrow the radiation band,which leads to a radiation with an obvious peak in the ***,the multi-grating structure has the ability to enhance the radiation intensity and shape the radiation frequency *** optimizing the structure parameters,coherent and tunable Smith-Purcell radiation can be realized,and it provides a potential way to develop band-controllable light or THz radiation source.

关键词： Smith-Purcell radiation multi-grating resonance mode

Pragmatic Errors in English Learners＇ Letter Writing

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Sino-US English Teaching 2007年第2期4卷 39-42,47页

作者： WANG man-liang School of English Studies Xi ＇an International Studies University Xi ＇an Shaanxi 710128 China

Letter writing is a major part of English practical writing. In their letter writing practice, English learners frequently commit all kinds of errors, quite a number of which are pragmatic errors. Since these errors seem to be quite correct in terms of grammar, they are likely to be ignored by both English learners and instructors. This paper attempts to expose such errors, analyze the causes of them and propose some tentative measures to prevent and to correct these errors.

关键词： English letters pragmatic errors

A numerical investigation of bubble dynamics based on the potential-flow theory

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Journal of Marine Science and Application 2006年第4期5卷 14-21页

作者： YAO Xiong-liang ZHANG A-man College of Shipbuilding Engineering Harbin Engineering University Harbin 150001 China

In this paper, the flow field is assumed to be inviscid, irrotational and incompressible, triangular elements are adopted to discretize the boundary of flow field, the boundary integral method is used to solve the flow field and the Mixed-Eulerian-Lagrangian method is applied to simulate the evolution of bubble. Three-dimensional smoothing method is used to smooth the bubble surface and the velocity potential to make the computing process more accurate and stable. In the analysis process, three-dimensional model simulates the dynamics of a bubble in the free field, gravitational field and near the rigid wall respectively, and the calculated results coincide well with the exact results and experimental data, which show that the algorithm and 3D model in this paper are of high accuracy. Calculation process indicates that bubble takes on strong non-linear under the combine effect of gravity and rigid wall.

关键词： bubble potential-flow theory boundary integral jet rigid wall three-dimensional

Influence of Grinding Ball⁃Motion Behavior on Particle Crushing Performance and a Way of Micro⁃particle Preparation in a Flutter Ball Mill

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Transactions of Nanjing University of Aeronautics and Astronautics 2021年第3期38卷 450-461页

作者： liang man SUN Weihong SUN Yi SHAN Jihong College of Mechanical and Electrical Engineering China Jiliang UniversityHangzhou 310018P.R.China College of Mechanical Engineering Zhejiang University of TechnologyHangzhou 310014P.R.China

Motion behavior of grinding balls plays a vital role in improving efficiency of particle crushing.A method of preparing micro-particles by changing ball-motion behavior in a flutter mill is proposed and multiple grinding experiments are *** performance parameters,such as breakage rate Si,production rates of fine particles Fi and Fi*,are studied in different motion *** the results,a better crushing performance is attained in the coupled motion modes of rotating speed ratio of 85%,with a vibrating amplitude of 8 mm and a frequency of 12 *** addition,the influence of ball-motion behavior on particle crushing performance is *** ball-motion behaviors,such as the collision energy loss E,among grinding balls have some relationship with the particle crushing performance of ***,this study not just provides an efficiency way of accumulating micro-particles,but also reveals how the ball-motion behavior influence particle crushing performance in the flutter mill.

关键词： flutter ball mill ball-motion behavior breakage rate collision energy loss micro-particle preparation

基于遗传算法的道路车辆自组织网络源路由机制

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交通运输系统工程与信息 2019年第4期19卷 43-49页

作者：蔡震梁满贵北京交通大学信息科学研究所北京100044 华北电力大学计算机系河北保定071003

在当前基于交叉路口的城市车辆自组织网络(VANETs)路由协议中,道路上数据包传输大多采用基于地理位置的贪婪转发策略,当数据量较大时,个别节点负载较重,极易引起传输延迟增大乃至丢包的情况.本文提出了一种基于遗传算法的源路由机制,通... 详细信息

在当前基于交叉路口的城市车辆自组织网络(VANETs)路由协议中,道路上数据包传输大多采用基于地理位置的贪婪转发策略,当数据量较大时,个别节点负载较重,极易引起传输延迟增大乃至丢包的情况.本文提出了一种基于遗传算法的源路由机制,通过记录单体车辆的驾驶信息而非传统方法中的车流均值数据,来预测道路上车辆网络的连通情况,并借助遗传算法,首次基于道路连通性、节点负载和连接跳数这3点综合考虑,计算得出道路上最佳的源路由节点序列.仿真实验结果表明,在传输率与延迟时间上,性能均优于传统的贪婪路由机制,尤其在车流量为250 veh·lane-1·h-1时,传输率提升约13%.该研究可为智能交通信息通讯提供可靠助力.

关键词：智能交通源路由遗传算法车辆自组织网络负载均衡