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Green Effectively Enhanced Extraction to Produce Yttrium(Ⅲ)in Slug Flow Microreactor

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Chinese Journal of Chemistry 2020年第5期38卷 471-477页

作者： Yuan He shenghui guo Kaihua Chen Shiwei Li Shaohua Yin Faculty of Metallurgical and Energy Engineering Kunming University of Science and TechnologyKunmingYunnan 650093China State Key Laboratory of complex Nonferrous Metal Resources Clean Utilization Kunming University of Science and TechnologyKunmingYunnan 650093China Kunming Key Laboratory of Special Metallurgy KunmingYunnan 650093China

Process reinforcement research was carried out in Y-junction slug flow microreactors under variable conditions,using EHEHPA(2-ethylhexyl phosphonic acid mono-2-ethylhexyl)to extract yttrium(Ⅲ)from hydrochloric acid *** influence of pH and flow rate on the extraction-reaction efficiency,slug size,mass transfer performance was *** experimental results showed that maximum extraction-reaction efficiency of 91.85%can be achieved in the smallest microreactor(residence time is 11.25 s),which was significantly higher than traditional extraction requiring more than 10 *** slug length tended to decrease with the increase of pH and flow *** mass transfer coefficients for the slug flow microreactors were found to be in the range of 1.39×10^-1-1.642s^-1 that is several orders of magnitude higher as compared to traditional extractors,which testified the beneficial effects of Y-junction slug flow *** mass transfer reinforcement has prompted the use of microreactor as a suitable alternative to traditional extractors,which can advantageously improve the economic and environmental development of mineral processing.

关键词： Slug assessed (Ⅲ)

Starting Control of Free Piston Stirling Linear Generator System Based on FOC

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CES Transactions on Electrical Machines and Systems 2022年第2期6卷 195-200页

作者： Qiaoling Yang Kechun Zhang shenghui guo Boliang Song Xiaoyu Zhang College of Electrical Engineering and Information Engineering Lanzhou University of TechnologyLanzhou730050China

Aiming at the problem of poor system dynamic performance caused by low parameter matching in the coordinated control of Stirling engine and linear generator in the starting stage control of free piston Stirling linear generator system,a joint control method of free piston Stirling permanent magnet synchronous linear generator system based on field orientation control is proposed,based on the theoretical derivation of the mathematical model of the system and the principle of controller parameters setting,the simulation experiments of the system starting stage under several Stirling engine working conditions are carried out under *** experimental results show that the stability and rapidity of the system are improved,and the dynamic response speed of generator parameters under different working conditions is accelerated,what fully verifies the correctness and effectiveness of the *** provides an effective way to improve the control performance of the system and stabilize the power generation operation.

关键词： Parameter setting Field orientation control Double closed loop Permanent magnet synchronous linear generator

Facile Synthesis of Nanocrystal Tin Oxide Hollow Microspheres by Microwave-Assisted Spray Pyrolysis Method

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Journal of Materials Science & Technology 2017年第8期33卷 874-878页

作者： Lihua Zhang Jianbo Lan Jianyu Yang shenghui guo Jinhui Peng Libo Zhang Chaojin Zhou Shaohua Ju State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization Kunrning 650093China Key Laboratory of Unconventional Metallurgy Ministry of EducationKunrning 650093China Faculty of Metallurgicul and Energy Engineering Kuaming University of Science and TechnologyKunrning 650093China Mineral Resources Department Yunnan Tin Company Group LimitedKunrning 650200China

Tin oxide（SnO2） hollow microspheres with narrow size distribution were prepared by a facile one-pot microwave-assisted spray pyrolysis method. The effect of temperature on microstructural and optical properties was investigated by X-ray diffraction（XRD）, scanning electron microscope（SEM）, high resolution transmission electron microscope（HRTEM）, and UV-Vis spectrophotometer（UV-Vis）, *** SnO2 particles obtained at and above 700？C are tetragonal rutile structure with high purity and smooth surface morphology, which consist of well-interconnected SnO2 nanocrystallines and the shell thickness was about 26 nm. UV-Vis absorption values were quite low in visible light region and high in ultraviolet region, indicating the possible utilization for optical purpose of the as-prepared SnO2. The band gaps were 3.88 and 4.07 e V for SnO2 synthesized at 700 and 800？C, respectively. As compared to traditional electrical heating or flame modes, microwave heating introduced here demonstrates a highefficiency, environmentally benign, and time-and energy-saving technology to synthesize advanced powders.

关键词： Hollow morphology Microwave Nanocrystallites Tin oxide Microstructural characterization

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多传感器智能车辆的编队运动自适应控制

西安工程大学学报 2024年第4期38卷 89-96页

作者：唐明珠相国梁时宏伟郭胜辉苏州科技大学电子与信息工程学院江苏苏州215009 连云港三新供电服务有限公司江苏连云港222000

面向具备多传感器的车辆编队问题,文中主要研究基于预定运动轨迹的自适应运动算法。首先,利用Kalman滤波处理多个传感器的数据信息得到最优数据融合估计,以获取车辆编队的最优位置信息。然后,通过车辆之间交换位置估计信息得到下一步车... 详细信息

面向具备多传感器的车辆编队问题,文中主要研究基于预定运动轨迹的自适应运动算法。首先,利用Kalman滤波处理多个传感器的数据信息得到最优数据融合估计,以获取车辆编队的最优位置信息。然后,通过车辆之间交换位置估计信息得到下一步车辆编队运动规划。分别考虑了无领导车的固定双向通信集群移动和有领导车的固定单向通信集群移动2种车辆编队运动,提出的方法不同于仅控制编队车辆向目的地移动的情况,而是通过车辆与相邻车辆节点交换位置信息,使得车辆编队可沿着预定的轨迹向终点位置移动。为了满足车辆之间维持理想距离的实际需求,分别引入使队列沿预定路径运动的牵引力和拓扑力2种虚拟力模型,其中牵引力主要引导车辆沿预定路径到达目的地,而拓扑力主要维持各跟随车辆之间的连接拓扑。仿真结果表明:所提方法相较于已有方法能有效缩短车辆安全距离、提升道路利用率,具有良好的适用性。

关键词：信息融合最优信息融合卡尔曼滤波车辆编队自适应控制

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含不确定参数的智能网联汽车协同编队控制

西安工程大学学报 2024年第3期38卷 117-125页

作者：时宏伟滕婧婧李凌云郭胜辉苏州科技大学电子与信息工程学院江苏苏州215009

为应对智能网联汽车协同编队控制中因自身条件以及外部攻击干扰引起的参数不确定变化问题,在智能网联汽车编队运行环境下提出了一种基于观测器的一致性控制协议设计方法。首先,通过设计观测器实现对系统状态、可测噪声和外部扰动等的有... 详细信息

为应对智能网联汽车协同编队控制中因自身条件以及外部攻击干扰引起的参数不确定变化问题,在智能网联汽车编队运行环境下提出了一种基于观测器的一致性控制协议设计方法。首先,通过设计观测器实现对系统状态、可测噪声和外部扰动等的有效估计。其次,设计适用的分布式一致性控制协议,利用Lyapunov泛函得到系统稳定的充分条件。再次,将观测器的增益矩阵转化为线性矩阵不等式的问题进行求解,利用线性矩阵不等式方法,获得观测器增益矩阵的具体取值,实现对系统状态和参数的准确估计。最后,利用Matlab对系统进行仿真,给定智能网联汽车编队系统各项具体参数,模拟系统存在外部干扰的情况以及参数中含有不确定的情况。仿真表明:在一致性控制后系统内部输入经过15个时间步后得到收敛,对于系统状态和外部干扰,观测器在含有不确定参数的干扰下分别经过17个和20个时间步之后能够进行有效的估计,从理论和仿真2个方面验证了所设计方法的正确性与可行性。

关键词：不确定参数智能网联汽车协同编队控制外部干扰

State and sensor fault interval estimations for discrete-time systems

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State and sensor fault interval estimations for discrete-tim...

第36届中国控制会议

作者： shenghui guo Fanglai Zhu Shuxian Zhu Huiyi Hu Junqi Yang College of Electronics and Information Engineering Suzhou University of Science and Technology Key Laboratory of Control Engineering of Henan Province Henan Polytechnic University College of Electronics and Information Engineering Tongji University College of Electrical Engineering and Automation Henan Polytechnic University

ISBN: (纸本)9781538629185

In this paper,the problem of state and sensor fault estimations by using interval observer for discrete-time systems is ***,the original system is transformed into a descriptor system without sensor ***,a non-feed-back framework interval observer（NFBFIO） is constructed for non-negative/negative ***,by using a linear transformation,a feed-back framework interval observer（FBFIO） is constructed for observable ***,two simulation examples show the validity and effectiveness of the proposed methods.

关键词： Interval estimations Sensor faults Non-feed-back framework Feed-back framework

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外周血细胞与骨质疏松症的因果关系

中国组织工程研究 2025年第12期29卷 2605-2613页

作者：刘科第陈勇喜覃海飚郭圣挥覃忠设蒙觉威崔善林范俊鸿广西中医药大学研究生学院广西壮族自治区南宁市530003 广西中医药大学第一附属医院广西壮族自治区南宁市530003

背景:流行病学调查和一些实验表明,外周血细胞和骨质疏松症存在密切关系,但两者在遗传学层面上的因果关系尚不清楚。目的:运用孟德尔随机化探究外周血细胞和骨质疏松症的因果关系。方法:从BCX、MRC-IEU等数据库分别获取外周血细胞、不... 详细信息

背景:流行病学调查和一些实验表明,外周血细胞和骨质疏松症存在密切关系,但两者在遗传学层面上的因果关系尚不清楚。目的:运用孟德尔随机化探究外周血细胞和骨质疏松症的因果关系。方法:从BCX、MRC-IEU等数据库分别获取外周血细胞、不同年龄段全身骨密度、跟骨骨密度的GWAS数据集,将血细胞作为暴露数据,不同年龄段骨密度及跟骨骨密度作为结局数据,使用逆方差加权法、MR-Egger、加权中值法、加权中位数、简单中位数等方法进行孟德尔随机化分析,使用Cochran’s Q、MR-Egger回归、Leave-one-out法等检验对结果进行异质性、多效性和敏感性评估,用β值评估暴露与结局的因果关系。结果与结论:①因Cochran’s Q结果显示孟德尔随机化结果存在异质性,故研究结果以逆方差加权法结果为标准。逆方差加权结果显示:当不同年龄段骨密度作为结局时,白细胞计数与(45-60岁)全身骨密度呈负向因果关系(β=-0.07,95%CI:-0.13,-0.01,P=0.02),单核细胞计数与(45-60岁)全身骨密度呈正向因果关系(β=0.05,95%CI:0.00,0.10,P=0.037),白细胞计数、嗜碱性粒细胞计数与(>60岁)全身骨密度呈负向因果关系(β=-0.04,95%CI:-0.07,-0.01,P=0.005;β=-0.04,95%CI:-0.07,-0.00,P=0.038),血红蛋白浓度及红细胞压积与(>60岁)全身骨密度呈正向因果关系(β=0.04,95%CI:0.01,0.08,P=0.012;β=0.04,95%CI:0.00,0.07,P=0.039),白细胞计数与(未区分年龄段)全身骨密度呈负向因果关系(β=-0.10,95%CI:-0.16,-0.03,P=0.002);当跟骨骨密度作为结局时,白细胞计数与跟骨骨密度呈负向因果关系(β=-0.04,95%CI:-0.07,-0.01,P=0.016),血红蛋白浓度、红细胞压积与跟骨骨密度呈正向因果关系(β=0.05,95%CI:0.01,0.08,P=0.007;β=0.05,95%CI:0.01,0.08,P=0.004)。②为保证结果稳健性,将外周血细胞与不同年龄段全身骨密度、跟骨骨密度的孟德尔随机化结果进行Meta分析,结果提示对数变换后的白细胞计数每降低一个标准差,会使骨密度降低的风险减少5%(OR=0.95,95%CI:0.94,0.97,P<0.001);血红蛋白浓度、红细胞压积每增加一个标准差,会使骨密度降低风险减少4%(OR=1.04,95%CI:1.03,1.06,P<0.001)。③结果提示:外周血细胞中白细胞计数增加是骨密度的风险因素;红细胞压积、血红蛋白浓度增高是骨密度的保护因素。

关键词：孟德尔随机化骨质疏松症骨密度外周血细胞因果关系

Application of Microwave Melting for the Recovery of Tin Powder

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Engineering 2017年第3期3卷 423-427页

作者： Lei Xu Jinhui Peng Hailong Bai C. Srinivasakannan Libo Zhang Qingtian wu Zhaohui Han shenghui guo Shaohua Ju Li Yang Faculty of MetaUurgical and Energy Engineering Kunming University of Science and Technology Kunming 650093 China State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization Kunming University of Science and Technology Kunming 650093 China Yunnan Tin Croup (Holding) Company Limited Gejiu Yunnan 661000 China Chemical Engineering Program The Petroleum Institute P.O. Box 2533 Abu Dhabi United Arab Emirates

The present work explores the application of microwave heating for the melting of powdered tin. The mor- phology and particle size of powdered tin prepared by the centrifugal atomization method were charac- terized. The tin particles were uniform and spherical in shape, with 90% of the particles in the size range of 38-75μm. The microwave absorption characteristic of the tin powder was assessed by an estimation of the dielectric properties. Microwave penetration was found to have good volumetric heating on powdered tin. Conduction losses were the main loss mechanisms for powdered tin by microwave heating at temperatures above 150 ℃. A 20 kW commercial-scale microwave tin-melting unit was designed, developed, and utilized for production. This unit achieved a heating rate that was at least 10 times higher than those of conventional methods, as well as a far shorter melting duration. The results suggest that microwave heating accelerates the heating rate and shortens the melting time. Tin recovery rate was 97.79%, with a slag ratio of only 1.65% and other losses accounting for less than 0.56%. The unit energy consumption was only 0.17 （kW·h）·kg-1- far lower than the energy required by conventional melting methods. Thus, the microwave melting process improved heating efficiency and reduced energy consumption.

关键词： Microwave heating Melting Tin powder Microwave equipment Recovery

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天然橡胶微波-热风联合干燥中试研究

橡胶科技 2024年第9期22卷 516-519页

作者：张荣华刘秉国杨俊君邓秋阳郭胜惠刘丹陈旺云南天然橡胶产业集团西双版纳景阳有限公司云南西双版纳666100 昆明理工大学冶金与能源工程学院云南昆明650093 云南西双版纳景诚力合科技有限公司云南西双版纳666100

在测试含水天然橡胶(NR)胶粒微波介电参数的基础上,采用自制的微波-热风联合干燥装置开展含水胶粒实验室阶段和中试阶段干燥试验,研究干燥时间、微波功率和热风功率等因素对NR胶粒脱水率及性能的影响,得到NR微波-热风联合干燥优化工艺... 详细信息

在测试含水天然橡胶(NR)胶粒微波介电参数的基础上,采用自制的微波-热风联合干燥装置开展含水胶粒实验室阶段和中试阶段干燥试验,研究干燥时间、微波功率和热风功率等因素对NR胶粒脱水率及性能的影响,得到NR微波-热风联合干燥优化工艺参数。与常规热风干燥相比,微波-热风联合干燥综合处理运行能耗基本持平,但干燥后的NR各项性能显著提高。

关键词：天然橡胶微波热风干燥中试

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