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Controlling the size of fragrance microcapsules using designed agitator paddles: Experiment and CFD simulation

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Particuology 2019年第2期17卷 38-45页

作者： Hongbin Zhao Xuening Fei Baolian Zhang Shuxing Zhao guangmin li lingyun Cao School of Chemical Engineering and Technology Tianjin University Tianjin 300350 China School of Science Tianjin Chengjian University Tianjin 300384 China School of Materials Science and Engineering Tianjin Chengjian University Tianjin 300384 China School of Energy and Safety Engineering Tianjin Chengjian University Tianjin 300384 China

Controlling the size of fragranee microcapsules using designed agitator paddles was investigated and studied by CFD simulation. First, different fluid flows were established by varying stirring speeds, reactor scales, and agitator paddle design, and the effects of each on particle size and distribution of prepared microcapsules were determined. The experimental results showed that the pattern design of orifices in the plate paddles control the flow field well. Narrow particle-size distributio ns of the microcapsules were obtained. The fluid flow characteristics including fluid velocity field, turbulent kinetic energy field, and shear stress distribution for thedifferent agitator paddle types in different reaction kettles were simulated using CFD tech no logy. The correlations between simulated data and experime ntal results were an alyzed. Significantly, the simulated average flow velocity was found to show good negative linear correlation w让h the average particle size of prepared microcapsules, with a correlation of y =-2.166x + 42.626.

关键词： Fragrance microcapsule Melamine-formaldehyde Particle size Orifice stirring paddle CFD simulation

Stable trajectory planning and energyefficience control allocation of lane change maneuver for autonomous electric vehicle

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Journal of Intelligent and Connected Vehicles 2018年第2期1卷 55-65页

作者： liwei Xu Guodong Yin guangmin li Athar Hanif Chentong Bian School of Mechanical Engineering Southeast UniversityNanjingChina Southeast University NanjingChina Department of Electrical Engineering COMSATS Institute of Information TechnologyLahorePakistan

Purpose–The purpose of this paper is to investigate problems in performing stable lane changes and toﬁnd a solution to reduce energy consumption of autonomous electric ***/methodology/approach–An optimization algorithm,model predictive control(MPC)and Karush–Kuhn–Tucker(KKT)conditions are adopted to resolve the problems of obtaining optimal lane time,tracking dynamic reference and energy-efﬁcient *** this paper,the dynamic constraints of vehicles during lane change areﬁrst established based on the longitudinal and lateral force coupling characteristics and the nominal reference ***,by optimizing the lane change time,the yaw rate and lateral acceleration that connect with the lane change time are ***,to assure the dynamic properties of autonomous vehicles,the real system inputs under the restraints are obtained by using the MPC *** on the gained inputs and the efﬁcient map of brushless direct-current in-wheel motors(BLDC IWMs),the nonlinear cost function which combines vehicle dynamic and energy consumption is given and the KKT-based method is ***–The effectiveness of the proposed control system is veriﬁed by numerical ***,the proposed control system can successfully achieve stable trajectory planning,which means that the yaw rate and longitudinal and lateral acceleration of vehicle are within stability boundaries,which accomplishes accurate tracking control and decreases obvious energy ***/value–This paper proposes a solution to simultaneously satisfy stable lane change maneuvering and reduction of energy consumption for autonomous electric *** from previous path planning researches in which only the geometric constraints are involved,this paper considers vehicle dynamics,and stability boundaries are established in path planning to ensure the feasibility of the generated reference path.

关键词： Autonomous electric vehicle Energy-efﬁcient control allocation Lane change maneuver Stable trajectory planning

Structural investigation and luminescent properties of BaZr(BO_3)_2:Eu^(3+) phosphors containing Si

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Chinese Science Bulletin 2010年第29期55卷 3252-3255页

作者： ZHANG ZhongPeng li guangmin ZHANG XiaoSong XU ShengYan JI Ting li Lan Insititute of Material Physics Tianjin University of Technology Key Laboratory of Display Materials and Photoelectric Devices Ministry of Education Tianjin Key Laboratory for Optoelectronic Materials and Devices Tianjin 300191 China Department of Fundamental Subjects Tianjin Institute of Urban Construction Tianjin 300384 China Tianjin Xinhua Staff and Workers University Tianjin 300040 China

Si4+-doped BaZr(BO3)2:Eu3+ phosphors are prepared by a conventional solid-state *** influence of Si4+ addition on the charge transfer state of Eu3+-O2- and photoluminescence(PL) properties of BaZr(BO3)2:Eu3+ are *** temperature PL spectra indicated that efficient emission is obtained by Si *** values for the peak-peak ratio(PPR) of BaZr(BO3)2:Eu3+ at higher Si doping concentrations implied that the Eu3+ ion is located in a more asymmetric environment in BaZr0.8Si0.2(BO3)2:Eu3+ than in the undoped *** Judd-Ofelt parameters Ωλ(λ=2,4) were calculated from the PL data,giving results that were consistent with those from the *** maximum radiative quantum efficiency was achieved at a Si doping concentration of 20 mol%.

关键词： Si掺杂铕离子荧光粉发光性能结构调查硅掺杂固相反应电荷转移

Research on China's New Middle East Diplomacy Strategy Construction under the Framework of International Law

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校园英语 2017年第9期 249-250页

作者： Xiaoyan Xue guangmin li Qing Dao University

This paper highlighted the necessity and feasibility of China’s new Middle East strategy construction under the framework of international law based on current situation in the Middle *** time background of"One Belt and One Road"and the research status were analysed in this *** opportunities and challenges brought by China’s new Middle East diplomacy strategy were illustrated,then China’s Middle East diplomacy strategy under the framework of international law was analysed and some suggestions were put forward on China’s new Middle East diplomacy strategy construction.

关键词： One Belt and One Road China’s new Middle East strategy Opportunities and challenges Diplomacy strategy

Robust H∞ Output-feedback Vehicle Yaw Control Using an Active Front Wheel Steering

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Robust H∞ Output-feedback Vehicle Yaw Control Using an Acti...

Reducing the core loss of amorphous cores for distribution transformers

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作者： Jinhao liang Guodong Yin guangmin li School of Mechanical Engineering Southeast University

In this paper, we investigate the vehicle stability control problem under the side wind disturbance. To improve the vehicle lateral stability, an active front wheel steering（AFS） is designed based on the robust H∞ output-feedback control. The robust controller takes the wind disturbance and uncertain parameters of the cornering stiffness into consideration while system modeling and controller designing. The simulation with obstacles suddenly encountering shows the vehicle can avoid the obstacles safely and effectively with side wind disturbances. By this way, the controller can improve the vehicle lateral stability and drivability significantly, and reduce the workload of the driver. In addition, good robustness is achieved while uncertain parameters exist.

关键词： Active Front Wheel Steering Robust H∞ output-feedback control Lateral Stabilization Control

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Progress in Natural Science:Materials International 2012年第3期22卷 244-249页

作者： Deren li, liang Zhang, guangmin li, Zhichao Lu, Shaoxiong Zhou China Iron & Steel Research Institute Group, Advanced Technology and Materials Co., Ltd., No. 76, Xueyuan Nan Rd., Haidian District, Beijing 100081, China China Iron & Steel Research Institute Group Advanced Technology and Materials Co. Ltd. No. 76 Xueyuan Nan Rd. Haidian District Beijing 100081 China

Although amorphous alloy ribbons have lower core loss, serious loss deterioration occurs in amorphous cores constructed from amorphous alloy ribbon for distribution transformer. In the present study, the loss deterioration mechanism and influencing factors of amorphous cores for distribution transformers were investigated. The influence of distributed gaps on core loss of transformer core was calculated by simulation software and validated by experiments. The boron fluctuation of amorphous alloy ribbons affects the annealing temperature of amorphous transformer cores. A superior core annealing technique with annealing parameters was developed, and appreciable decrease in core loss was obtained.

关键词： Amorphous core Annealing technique Reducing core loss Loss deterioration Distribution transformer

中文期刊分类种次索刊号公式化的设计——以贵州航天职业技术学院图书馆为例

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图书馆建设 2011年第3期 72-74,78页

作者：李光敏贵州航天职业技术学院图书馆贵州遵义563000

索刊号的公式设定了种次号、附加区分号的符号、表示方法及位置。以公式化的形式来设计中文期刊分类种次索刊号简单易懂,更显公式化、系统化、专业化及科学化的特点,可以规范期刊资料的藏刊、排架和目录组织,是现代化图书馆取放期刊资... 详细信息

索刊号的公式设定了种次号、附加区分号的符号、表示方法及位置。以公式化的形式来设计中文期刊分类种次索刊号简单易懂,更显公式化、系统化、专业化及科学化的特点,可以规范期刊资料的藏刊、排架和目录组织,是现代化图书馆取放期刊资料比较完整的识别符号。

关键词：期刊分类种次索刊号公式化设计

Recent development in electrode design for wide-temperature supercapacitors

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Science China Chemistry 2025年第1期 96-117页

作者： Jianhong liu Qiang Zhou Yuxiao lin Xinsheng Zhao guangmin Zhou Xiaoxiao li School of Physics and Electronic Engineering Jiangsu Normal University Tsinghua-Berkeley Shenzhen Institute & Tsinghua Shenzhen International Graduate School Tsinghua University

An ever-increasing market demand has stimulated the soaring enthusiasm of researchers to develop wide-temperature supercapacitors(SCs). The active electrode is one of the most important parts of SC, which is directly related to the energy density,power transmission and long-term cyclability of the device in the wide-temperature environment. Compared with the SC electrodes aimed for room-temperature application, the SC electrodes for operating at wide-temperature scene often face greater challenges. In this review, the main challenges of SC electrodes under various temperature conditions, including low, high and cross-fade temperatures, are summarized. The relevant performance decay and failure mechanisms of wide-temperature SC electrodes are analyzed. In addition, this review deals with the recent studies and developments in robust wide-temperature SC electrodes with respect to the rational design of electrode structures and the exploitation of advanced active materials. Finally, the future directions for exploring reliable wide-temperature SCs are also proposed.

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冷战后日本地区主义的实践及其动因

国际观察 2010年第3期 31-37页

作者：李广民江立青岛大学法学院

战略上日本虽长期坚持"脱亚入欧"、"作为西方的一员",但始终没有放弃其在亚洲的"努力"。特别是冷战后,日本进一步加大了融入亚洲的步伐。当前,高举地区主义旗帜的民主党政府,其实是延续了冷战结束以来日本一直在实行的地区主义战略。日... 详细信息

战略上日本虽长期坚持"脱亚入欧"、"作为西方的一员",但始终没有放弃其在亚洲的"努力"。特别是冷战后,日本进一步加大了融入亚洲的步伐。当前,高举地区主义旗帜的民主党政府,其实是延续了冷战结束以来日本一直在实行的地区主义战略。日本做出回归亚洲的选择,一方面是为了实现本国的经济复兴和发展;另一方面,也是为了实现其政治大国的长久理想。

关键词：日本外交地区主义亚洲政策