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Preparation of Thermal Insulation Ceramics Using Felsic Tailings as Main Raw Material and Soda-ash Dregs as Flux

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Journal of Wuhan University of Technology(Materials Science) 2023年第1期38卷 31-41页

作者：王志明 YAO Geng WANG Qiang zhu xiangnan QU Meiyun ZHAO Wei LIU Qing SUN Shaokang XIA Chuanbo 吕宪俊 School of Chemical and Biological Engineering Shandong University of Science and TechnologyQingdao 266590China Shandong Institute of Geological Sciences Key Laboratory of Gold Mineralization Processes and Resource UtilizationMNRShandong Provincial Key Laboratory of Metallogenic Geological Process and Resource UtilizationJinan 250013China College of Chemistry Chemical Engineering and Materials ScienceZaozhuang UniversityZaozhuang 277160China Jigang International Engineering&Technology Co. Ltd.Jinan 250101China

Low-cost thermal insulation porous ceramics with uniform pore diameter and low bulk density were prepared with soda-ash dregs and felsic *** investigated the effect of temperature,foaming agent,fluxing agent,Al_(2)O_(3)and CaO content on the pore structure and crystal phase of porous *** effect of Ca^(2+)in soda-ash dregs on the preparation of quartz-feldspar based porous ceramics was *** results showed that the contribution of Ca^(2+)to the preparation of porous ceramics in this system was mainly to accelerate the Si-O bond fracture and reduce the sintering temperature at the initial stage of sintering,which destroyed the needle-like feldspar in the high temperature melt and reduced the melt viscosity,thus reduced the foaming resistance and promoted the porous products with uniform pore size *** Ca^(2+)content on the high side can participate in the formation of crystals in *** generated needle-like diopside and augite,which have small length-diameter ratio,will negligibly change in the viscosity of melt at high temperatures,and their inhibition effect on pores is not as good as that of feldspar with large length-diameter ratio,resulting in the merger and collapse of *** the increase of diopside and augite can improve the compressive strength of porous products to some *** ceramic products containing needle-like feldspar phase can be prepared by using two kinds of solid waste,which can improve the compressive strength of the products and reduce the raw material cost and energy consumption while comprehensively utilizing the double solid *** optimal product has a bulk density of 0.45 g/cm^(3),a compressive strength of 3.17 MPa,and a thermal conductivity of 0.11 W/(m·K).

关键词： felsic tailings Ca-riched Soda-ash dregs low-cost thermal insulation porous ceramics high content of solid waste transformation of needle-like crystal phase

基于BERT和领域词典融合的中文电子病历命名实体识别

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计算机与数字工程 2024年第3期52卷 746-750,767页

作者：叶恩光张晓如张再跃丁腊春朱向南王译江苏科技大学镇江212003 镇江市第四人民医院镇江212001

医疗数据挖掘的起始环节为CNER(中文电子病历命名实体识别),将相关实体(解剖部位、药品、影像检查等)识别出非结构化文本是其目标所在。基于CNER准确性提升需要,论文设计了BERT-BiLSTM-CRF模型融合领域词典技术,该技术能将上下文语义关... 详细信息

医疗数据挖掘的起始环节为CNER(中文电子病历命名实体识别),将相关实体(解剖部位、药品、影像检查等)识别出非结构化文本是其目标所在。基于CNER准确性提升需要,论文设计了BERT-BiLSTM-CRF模型融合领域词典技术,该技术能将上下文语义关系全面结合,一词多义问题同样可以迎刃而解,获取电子病历句子的长距离依赖。CNER采用BERT-BiLSTM-CRF模型融合领域词典技术时的F1值已经被实验结果所证实,对知识图谱的构建、临床决策支持系统和病历质控系统等的研究有着重要意义。

关键词：中文电子病历命名实体识别 BERT-BiLSTM-CRF 领域词典

Flow-field analysis of a continuous gas-solid separation fluidized bed equipped with a moving scraper

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Particuology 2021年第4期19卷 45-55页

作者： Bo Lv Xiaowei Deng Chaojun Fang xiangnan zhu College of Chemistry and Chemical Engineering Henan Polytechnic UniversityJiaozuo 454000China Henan Key Laboratory for Green and Efficient Mining&Comprehensive Utilization of Mineral Resources Henan Polytechnic UniversityJiaozuo 454000China School of Chemical&Environmental Engineering Shandong University of Science&TechnologyQingdao 266590China

Continuous gas-solid separation fluidized beds are one of the most widely used practical operation units for the dry separation of coal in China,particularly in Northwest China,and they can effectively promote the efficient and clean utilization of raw *** a continuous gas-solid separation fluidized bed,the bed flow field is the concrete manifestation of the fluidization ***,the complexity of the flow field increases under the action of a moving *** this study,a combination of computational fluid dynamics(CFD)simulations and experimental measurements was used to study the changes in the flow field of a fluidized *** results showed that when the scraper moved,the local flow field(mainly characterized by the movement of medium particles)near the scraper was affected not only by the common airflow or bubbles,but also by the lateral driving force of the *** the scraper speed was v_(l)<6.0 cm/s,it reduced the frequency of the formation of large bubbles and alleviated the random fluctuation of the nearby particle collision stress signals,which improved the fluidization stability of the ***,the movement of the scraper affected the global flow *** flow field shifted to the right near the scraper,with the direction of the scraper movement,while the flow field exhibited a leftward trend on the surface of the bed,accompanied by some vortices,in the middle and lower parts of the ***,the critical height of the area,directly affected by the scraper,increased from 52 to 54 mm with an increase in its operating speed from v_(l)=2.96 cm/s to v_(l)=4.44 cm/s,*** provides a theoretical basis for further understanding the hydrodynamic characteristics of fluidized beds.

关键词： Simulation analysis Moving scraper Flow-field Particle collision pressure Hydrodynamic characteristics

Particle mixing behavior of fine coal in density control of gas-solid separation fluidized bed

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Particuology 2020年第3期18卷 76-87页

作者： Bo Lv Zhenfu Luo Yanhong Fu Bo Zhang Xingzong Qin xiangnan zhu College of Chemistry and Chemical Engineering Henan Polytechnic UniversityJiaozuo 454000China Key Laboratory of Coal Processing and Efficient Utilization of Ministry of Education China University of Mining&TechnologyXuzhou 221116China School of Chemical Engineering and Technology China University of Mining and TechnologyXuzhou 221116China School of Chemical&Environmental Engineering Shandong University of Science&TechnologyQingdao 266590China

In a gas-solid separation fluidized bed,mixing of fine coal is necessary to achieve a suitable bed density to enable effective separation of low rank *** the basis of a variety of mixture models,a gas-solid separation fluidized bed was judged,where fine coal particles of 0.6-1.0mm were uniformly mixed with magnetite ***-speed dynamic camera technology was combined with a slump-sampling method to study the mixing process of the fine coal in the fluidized *** results showed that limitations of the fluidized bed structure cause the mixing process to be dominated by lateral diffusion and supplemented by axial *** diffusion was mainly achieved through the ascension of bubbles,whereas lateral diffusion was determined by the bursting action of the gas bubbles at the surface of the bed and the undulating characteristics of the *** effective lateral diffusion coefficient increased exponentially with gas velocity but had no strong relationship with the bed *** the feed point moved toward the center,fine coal began to diffuse to both sides,which shortened the time for the bed density stabilization from 20 to 5 *** bed density of the layer was stabilized at approximately 1.75 g/*** separation efficiency of the gas-solid separation fluidized bed containing binary mixtures was more obvious for 6-50 mm raw coal,with a probable error E of 0.16.

关键词： Gas-solid separation fluidized bed Density control Fine coal Diffusion behavior Separation process

Liberation characteristics of coal middlings comminuted by jaw crusher and ball mill

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International Journal of Mining Science and Technology 2013年第5期23卷 669-674页

作者： Xie Weining He Yaqun zhu xiangnan Ge Linhan Huang Yajun Wang Haifeng School of Chemical Engineering and Technology China University of Mining & Technology Advanced Analysis & Computation Center China University of Mining & Technology

The associated minerals make coal middlings possess a relatively high ash *** liberation through size reduction can cause recovery ***,effect of comminution facilities on mineral liberation of middlings was *** paper studied the liberation characteristics of middlings crushed with different kinds of fragmentation *** of 3 mm+0.5 mm sampled from a dense medium cyclone were comminuted by a jaw crusher and a ball mill to 0.5 mm with similar size distribution *** generating mechanism of fnes was also *** densimetric analyses indicate that mineral liberation of the product crushed by the jaw crusher is better than that by the ball mill at each *** sizes of 0.125 mm+0.074 mm and 0.074 mm,yields of the product with ash content 11%comminuted by jaw crusher are nearly 20%higher than that by the ball *** micrographs observed by the scanning electron microscopy(SEM)also show the same law for these two fractions and some intergrowth particles still exist in the fraction of 0.5 mm+0.25 mm.

关键词： Coal middlings Fragmentation force Liberation Float and sink test Sectional micrograph

蒙脱石/二烷基二硫代磷酸钼复合润滑油添加剂的摩擦学性能

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硅酸盐学报 2024年第1期52卷 170-179页

作者：康向南钟升旭丁锐马军李梁朱玉芹国家能源集团宁夏煤业公司枣泉煤矿宁夏灵武750409 中煤科工机器人科技有限公司广东深圳518052

添加剂是改善润滑油性能的重要手段,对蒙脱石(MMT)和有机钼复合润滑油添加剂的减摩抗磨性能进行了研究,期望取得较单一添加剂更优异的润滑效果,提高机械设备在恶劣工况下的运行稳定性和安全性。研究结果表明:有机钼中的二烷基二硫代磷酸... 详细信息

添加剂是改善润滑油性能的重要手段,对蒙脱石(MMT)和有机钼复合润滑油添加剂的减摩抗磨性能进行了研究,期望取得较单一添加剂更优异的润滑效果,提高机械设备在恶劣工况下的运行稳定性和安全性。研究结果表明:有机钼中的二烷基二硫代磷酸钼(MoDDP)和MMT作为单一润滑油添加剂均表现出较好的润滑性能,随着MMT和MoDDP添加质量分数的增加,摩擦系数和磨斑直径呈现先降低后升高的趋势,MMT和MoDDP的最佳添加质量分数分别为3.0%和1.5%。与基础油相比,1.5%MoDDP可分别降低41.0%的摩擦系数和48.9%的磨斑直径,3.0%MMT可分别降低40.6%的摩擦系数和48.2%的磨斑直径。与单一添加剂MMT、MoDDP相比,3.0%MMT/1.5%MoDDP复合添加剂可进一步改善润滑油的减摩抗磨性能,相较于基础油,可分别降低56.3%的摩擦系数和52.3%的磨斑直径。MMT和MoDDP具有优良的润滑性能和协同作用,润滑过程中能生成MoS_(2)、MoO_(2)、FeS_(2)、Fe_(2)O_(3)化学反应膜和SiO_(2)物理吸附膜,能够有效地降低摩擦、减少磨损。

关键词：蒙脱石二烷基二硫代磷酸钼复合润滑油添加剂减摩抗磨

基于离心力场下Falcon分选机内流膜运动特性研究

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中国矿业大学学报 2016年第3期45卷 597-601,609页

作者：陶有俊宋傲羡宇帅王旭朱向楠中国矿业大学化工学院江苏徐州221116 中国矿业大学煤炭加工与高效洁净利用教育部重点实验室江苏徐州221116

通过流体力学理论和数值计算方法,研究了Falcon离心分选机内流膜运动特性,建立了反冲水孔与反冲水初始流速的关系模型.利用离心分选流体计算理论,建立了Falcon分选机分层区与分选区的流膜厚度计算模型,并分别利用反冲水作用下矿粒极限... 详细信息

通过流体力学理论和数值计算方法,研究了Falcon离心分选机内流膜运动特性,建立了反冲水孔与反冲水初始流速的关系模型.利用离心分选流体计算理论,建立了Falcon分选机分层区与分选区的流膜厚度计算模型,并分别利用反冲水作用下矿粒极限脉动高度和流膜表面波理论确定了流膜分选下限的计算方法,并进行实验验证.研究结果表明:分层区流膜厚度与给料速度成正比,与离心机转速、流膜高度位置成反比;分选区流膜厚度与反冲水压成正比,与转速成反比.Falcon离心分选的分选下限受到颗粒极限脉动高度和表面波的双重限制,分选下限与流膜厚度成正比,与分选的矿物密度成反比.

关键词： Falcon离心分选机流膜反冲水分选下限表面波

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基于深度学习的半监督信号调制样式识别算法

电子科技大学学报 2024年第4期53卷 511-518页

作者：张柏林姬港朱宇轩许向楠唐万斌中山大学系统科学与工程学院广州510275 中国人民解放军军事科学院系统工程研究院北京100191 电子科技大学通信抗干扰全国重点实验室成都611731

得益于深度学习的发展,使用神经网络提升信号识别性能取得了很大进步。使用半监督方法充分利用未标记数据来辅助深度模型的训练,但是现有的半监督信号识别方法未考虑噪声的影响,因此提出了一种基于深度残差网络(Resnet)的半监督信号识... 详细信息

得益于深度学习的发展,使用神经网络提升信号识别性能取得了很大进步。使用半监督方法充分利用未标记数据来辅助深度模型的训练,但是现有的半监督信号识别方法未考虑噪声的影响,因此提出了一种基于深度残差网络(Resnet)的半监督信号识别方法,并利用梯度逆转层改善了噪声对性能的影响。在开源数据集RML2016.10A、RML2016.10B和RML2016.10C上的实验结果表明,该半监督方法可借助少量标签数据信息和未标记数据来有效地训练深度模型,并且能缓解噪声对性能的影响。

关键词：调制样式半监督学习卷积神经网络信号识别

高职院校转型发展背景下现代学徒制推行的困境与路径

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现代教育管理 2016年第8期 111-115页

作者：刘晓明朱向楠扬州工业职业技术学院江苏扬州225127

在国家支持职业教育发展、高职院校逐步转型的背景下,积极推行现代学徒制,得到了政府主导下的多元推动力,契合了校企合作理念。但顶层设计不完善、企业的"冷"参与、学生发展方式的落后、学校内部力量的分化造成了现代学徒制推行的困境,... 详细信息

在国家支持职业教育发展、高职院校逐步转型的背景下,积极推行现代学徒制,得到了政府主导下的多元推动力,契合了校企合作理念。但顶层设计不完善、企业的"冷"参与、学生发展方式的落后、学校内部力量的分化造成了现代学徒制推行的困境,需要从理念、实践、方式、制度等方面探寻解决问题的路径。

关键词：高职院校转型发展学徒制推行