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Numerical study on the filtration characteristics of fine particles in granular bed filter at high temperature

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PARTICUOLOGY 2024年第10期93卷 41-53页

作者： Zhu, Kangning cai, jie Li, Yuan Shen, Xiaoyou Xi, Jianfei Wang, Yunjun Gu, Zhongzhu Nanjing Normal Univ Sch Energy & Mech Engn Nanjing 210023 Peoples R China

Granular bed filter (GBF) has become one of the current research hot topics due to its excellent performance in removing fine particles. In this paper, a three-dimensional fixed bed GBF filtration model was established and its accuracy was verified. Then, the GBF filtration performance at high temperature were studied. The results demonstrate that elevating the temperature diminishes the filtration efficiency, albeit to a limited extent. The increasing of inlet gas velocity can significantly improve pressure drop for GBF and the filtration efficiency for fine particles of sizes larger than 5 mm. As the diameter of stacked granular particle diameter grows, the filtration efficiency and pressure drop drops. The density of fine particles almost does not affect the filtration efficiency for fine particles of 1 similar to 7 mu m, but a higher density leads to a higher filtration efficiency for fine particles of sizes bigger than 9 mm. Additionally, as the fine particles size increases, the change of the filtration efficiency roughly goes through three stages: Stage 1: the filtration efficiency is basically unchanged; Stage 2: the filtration efficiency increases rapidly; Stage 3: the filtration efficiency increases steadily, but the rate of increase slows down. With the increase of the fine particles Stokes number, the filtration efficiency of GBF will pass through two phases of stabilization and rapid increase. (c) 2024 Chinese Society of Particuology and Institute of Process Engineering, Chinese Academy of Sciences. Published by Elsevier B.V. All rights are reserved, including those for text and data mining, AI training, and similar technologies.

关键词： Granular bed filter Fine particles High temperature Filtration efficiency HOT GAS CLEANUP POROUS-MEDIA PACKED-BED MODEL SIMULATION PARAMETER FLOW ASH OPTIMIZATION TECHNOLOGY

High-current pulsed electron beam modification on microstructure and performance of Cu/CuW diffusion bonding joints

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Rare Metals 2024年第6期43卷 2819-2831页

作者： Na-Na Tian Cong-Lin Zhang Peng Lyu Jin-Tong Guan jie cai Qing-Feng Guan Shun Guo School of Materials Science and Engineering Jiangsu UniversityZhenjiang 212013China School of Material Science and Engineering Yancheng Institute of TechnologyYancheng 221051China Engineering Institute of Advanced Manufacturing and Modern Equipment Technology Jiangsu UniversityZhenjiang 212013China

This study investigates the influence of high-current pulsed electron beam(HCPEB)modification on the microstructure and shear strength of Cu/CuW *** solid-state diffusion bonding of modified-Cu(MCu)and modified-CuW(M-CuW)was achieved by HCPEB modification pretreatment at a temperature of 800-900℃and a pressure of 5 MPa for 10-50 *** demonstrate that HCPEB modification facilitates the dissolution of W and Cu,resulting in the formation of a Cu_(0.4)W_(0.6)solid solution and thus enhancing the uniform distribution of ***,HCPEB-induced defects play a beneficial role in promoting the diffusion process by providing fast diffusion paths for *** optimal joints with the maximum shear strength of 213.7 MPa were obtained through bonding M-Cu and M-CuW at 900℃and 5 MPa for 30 min,which attributes to the combined effects of fine-grained strengthening and solid solution ***,the application of HCPEB modification showcases its effectiveness in promoting element diffusion and enhancing the mechanical performance of the joints.

关键词： HCPEB Element diffusion Shear strength Crystal defects Surface modification

Performance-control-orientated hybrid metal additive manufacturing technologies:state of the art,challenges,and future trends

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International Journal of Extreme Manufacturing 2024年第3期6卷 274-328页

作者： Jiming Lv Yuchen Liang Xiang Xu Gang Xu Hongmei Zhang Haifei Lu Kaiyu Luo jie cai Jinzhong Lu School of Mechanical Engineering Jiangsu UniversityZhenjiang 212013People’s Republic of China School of Mechanical Engineering Jiangsu University of Science and TechnologyZhenjiang 212003People’s Republic of China

Metal additive manufacturing(AM)technologies have made significant progress in the basic theoretical field since their invention in the ***,performance instability during continuous processing,such as thermal history,residual stress accumulation,and columnar grain epitaxial growth,consistently hinders their broad application in standardized industrial *** overcome these challenges,performance-control-oriented hybrid AM(HAM)technologies have been *** technologies,by leveraging external auxiliary processes,aim to regulate microstructural evolution and mechanical properties during metal *** paper provides a systematic and detailed review of performance-control-oriented HAM technology,which is categorized into two main groups:energy field-assisted AM(EFed AM,***,electromagnetic,and heat)technologies and interlayer plastic deformation-assisted AM(IPDed AM,*** shock peening,rolling,ultrasonic peening,and friction stir process)*** review covers the influence of external energy fields on the melting,flow,and solidification behavior of materials,and the regulatory effects of interlayer plastic deformation on grain refinement,nucleation,and ***,the role of performance-control-oriented HAM technologies in managing residual stress conversion,metallurgical defect closure,mechanical property improvement,and anisotropy regulation is thoroughly reviewed and *** review concludes with an analysis of future development trends in EFed AM and IPDed AM technologies.

关键词： hybrid additive manufacturing in-situ/interlayer plastic deformation auxiliary energy fields microstructure customization mechanical properties enhancement

Frequency and associated factors of accommodation and non-strabismic binocular vision dysfunction among medical university students

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International Journal of Ophthalmology(English edition) 2024年第2期17卷 374-379页

作者： jie cai Wen-Wen Fan Yun-Hui Zhong cai-Lan Wen Xiao-Dan Wei Wan-Chen Wei Wan-Yan Xiang Jin-Mao Chen Department of Ophthalmology First Affiliated Hospital of Guangxi Medical UniversityNanning 530021Guangxi Zhuang Autonomous RegionChina Digital and Intelligent Technology Transformation and Application Research Institute of Visual Function Tianjin 300000China Guangxi Medical University Nanning 530021Guangxi Zhuang Autonomous RegionChina

AIM:To investigate the frequency and associated factors of accommodation and non-strabismic binocular vision dysfunction among medical university ***:Totally 158 student volunteers underwent routine vision examination in the optometry clinic of Guangxi Medical *** data were used to identify the different types of accommodation and nonstrabismic binocular vision dysfunction and to determine their *** analysis and logistic regression were used to examine the factors associated with these ***:The results showed that 36.71%of the subjects had accommodation and non-strabismic binocular vision issues,with 8.86%being attributed to accommodation dysfunction and 27.85%to binocular *** insufficiency(CI)was the most common abnormality,accounting for 13.29%.Those with these abnormalities experienced higher levels of eyestrain(χ2=69.518,P<0.001).The linear correlations were observed between the difference of binocular spherical equivalent(SE)and the index of horizontal esotropia at a distance(r=0.231,P=0.004)and the asthenopia survey scale(ASS)score(r=0.346,P<0.001).Furthermore,the right eye's SE was inversely correlated with the convergence of positive and negative fusion images at close range(r=-0.321,P<0.001),the convergence of negative fusion images at close range(r=-0.294,P<0.001),the vergence facility(VF;r=-0.234,P=0.003),and the set of negative fusion images at far range(r=-0.237,P=0.003).Logistic regression analysis indicated that gender,age,and the difference in right and binocular SE did not influence the emergence of these ***:Binocular vision abnormalities are more prevalent than accommodation dysfunction,with CI being the most frequent *** binocular refractive disparity leads to more severe eyestrain symptoms.

关键词： optometry clinic non-strabismic binocular vision dysfunction college students convergence insufficiency

Rationally designing electrolyte additives for highly improving cyclability of LiNi_(0.5)Mn_(1.5)O_(4)/Graphite cells

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Journal of Energy Chemistry 2024年第4期91卷 266-275页

作者： Zhiyong Xia Kuan Zhou Xiaoyan Lin Zhangyating Xie Qiurong Chen Xiaoqing Li jie cai Suli Li Hai Wang Mengqing Xu Weishan Li School of Chemistry South China Normal UniversityGuangzhou 510006GuangdongChina China Zhuhai CosMX Battery Co. Ltd.Zhuhai 519180GuangdongChina National and Local Joint Engineering Research Center of MPTES in High Energy and Safety LIBs Engineering Research Center of MTEES(Ministry of Education)and Key Lab.of ETESPG(GHEI)South China Normal UniversityGuangzhou 510006GuangzhouChina

High voltage is necessary for high energy lithium-ion batteries but difficult to achieve because of the highly deteriorated cyclability of the batteries.A novel strategy is developed to extend cyclability of a high voltage lithium-ion battery,LiNi_(0.5)Mn_(1.5)O_(4)/Graphite(LNMO/Graphite)cell,which emphasizes a rational design of an electrolyte additive that can effectively construct protective interphases on anode and cathode and highly eliminate the effect of hydrogen fluoride(HF).5-Trifluoromethylpyridine-trime thyl lithium borate(LTFMP-TMB),is synthesized,featuring with *** anion TFMPTMB-tends to be enriched on cathode and can be preferentially oxidized yielding TMB and radical TFMP-.Both TMB and radical TFMP can combine HF and thus eliminate the detrimental effect of HF on cathode,while the TMB dragged on cathode thus takes a preferential oxidation and constructs a protective cathode *** the other hand,LTFMP-TMB is preferentially reduced on anode and constructs a protective anode ***,a small amount of LTFMP-TMB(0.2%)in 1.0 M LiPF6in EC/DEC/EMC(3/2/5,wt%)results in a highly improved cyclability of LNMO/Graphite cell,with the capacity retention enhanced from 52%to 80%after 150 cycles at 0.5 C between 3.5 and 4.8 *** as-developed strategy provides a model of designing electrolyte additives for improving cyclability of high voltage batteries.

关键词： Electrolyte additive Design and synthesis Cyclability High voltage batteries Cathode and anode interphases

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“一多”视角下中国早期哲学的两种形态

中国高校社会科学 2024年第5期 91-101,M0005页

作者：蔡杰山东大学儒家文明协同创新中心暨儒学高等研究院济南250013

“一多”关系是考察中西文明的重要视角和方法。作为中国哲学的本源本体的“一”,常常兼具宇宙论与本体论的维度,显示出中华文明强烈的宇宙论执着。在先秦诸子哲学中,儒家与墨家以“天”作为本体,道家与法家以“道”作为本体,代表了中... 详细信息

“一多”关系是考察中西文明的重要视角和方法。作为中国哲学的本源本体的“一”,常常兼具宇宙论与本体论的维度,显示出中华文明强烈的宇宙论执着。在先秦诸子哲学中,儒家与墨家以“天”作为本体,道家与法家以“道”作为本体,代表了中国早期哲学的两种主要形态。儒家重视“天”的主宰功能,其主宰作用主要落在“生生”,一方面体现了“天”的终极决定性,另一方面也流露出鲜明的人文精神。墨家同样强调“天”的主宰性,但其主宰作用体现在对人事社会的赏罚上。道家将“道”视为宇宙万物的本质,这是中国早期哲学的另一种思路。道家取消了具有主宰作用的超越者,而确立了一个具有普遍性的、完全抽象的“道”,作为宇宙万物存在的终极根据。法家在“道”的基础上,发明万事万物层面的“理”,作为万事万物的内在根据,由此倡导君主以“道”统“理”。总之,中国早期哲学具有鲜明的贵“一”倾向,但也注重超越层面与现实世界的兼顾和相融。

关键词： “一多”关系先秦诸子哲学 “天” “道”

从蒙学读物到孝治经典:晚明《孝经》学的复兴

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山西大学学报(哲学社会科学版) 2024年第4期47卷 42-52页

作者：蔡杰山东大学儒家文明省部共建协同创新中心

《孝经》在宋至明初受到冷遇，但在晚明时期再度兴盛。《孝经》复兴之初，是通过与《大学》同出于孔、曾授受的关系，与《大学》相结合，进而在义理上与“四书”形成互为表里的关系。但这仍局限于“四书”体系，真正对宋明理学形成突破... 详细信息

《孝经》在宋至明初受到冷遇，但在晚明时期再度兴盛。《孝经》复兴之初，是通过与《大学》同出于孔、曾授受的关系，与《大学》相结合，进而在义理上与“四书”形成互为表里的关系。但这仍局限于“四书”体系，真正对宋明理学形成突破，是从《孝经》与《春秋》相配开始。基于孔子“志在《春秋》,行在《孝经》”言论，明代中后期《春秋》与《孝经》再度结合，形成刑书与德教的关系。由此，《孝经》进一步与“六经”相配，回归“六经之总会”的经典地位。同时，这也是《孝经》摆脱蒙书、回归孝治经典的过程。这一过程始于对王安石罢黜《孝经》的批判，以及对“孝”的概念范围的反思，目的是使《孝经》超越家庭内部的事亲仪节，回归先王以孝治天下的大经大法，体现了晚明儒者对孝德的高度肯定，隐含着对“二帝三王”之治的畅想。

关键词：《孝经》四书六经蒙书二帝三王

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仁治与无治:梁启超论儒家与道家政治思想

孔子研究 2024年第4期 68-81,158,159页

作者：蔡杰山东大学儒家文明省部共建协同创新中心、儒学高等研究院济南250100

梁启超在游历欧洲归国之后,对中国传统治道作了一番检视,主要集中在先秦诸子学派。梁启超提出无治主义、礼治主义、人治主义、法治主义,分梳先秦道家、儒家、墨家、法家的治道思想。儒家治道以人治主义为基础,并以礼治主义为补充。梁启... 详细信息

梁启超在游历欧洲归国之后,对中国传统治道作了一番检视,主要集中在先秦诸子学派。梁启超提出无治主义、礼治主义、人治主义、法治主义,分梳先秦道家、儒家、墨家、法家的治道思想。儒家治道以人治主义为基础,并以礼治主义为补充。梁启超认为,儒家治道的根本在于仁,他将仁理解为同体意识或感通之心,是维系共同体的根本。儒家治道拥有目的论维度,旨在通过礼乐教化的方式,提升国民人格,使之凝聚成朝向繁荣的社会共同体。道家治道是无治主义,不同于儒家以人为中心,道家是以自然为中心,拒斥政府的干涉。梁启超主要是以无为理解自然,并将无为追溯到无私无欲,然而梁启超就此提出道家思想的一处矛盾,即无为的悖论问题,并表示出对道家治道的批评和不满。梁启超的论断虽有独到之处,但也有不足,例如忽略了儒家天治主义的超越维度,再如对道家治道的批评可能有失公允。但梁启超旨在阐发永恒的治道真理,将目光重新投向中国传统治道,为现代中国谋求新的出路,体现了对中华优秀传统文化的自信。

关键词：梁启超儒家道家仁治礼治无治

淀粉基凝胶-多酚递送体系:从结构设计到食品应用

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食品科学 2024年第3期45卷 307-316页

作者：蔡杰桂玥张碟武汉轻工大学硒科学与工程现代产业学院国家富硒农产品加工技术研发专业中心湖北省绿色富硒农产品精深加工技术研发工程中心湖北武汉430023 武汉轻工大学大宗粮油精深加工教育部重点实验室农产品加工与转化湖北省重点实验室湖北武汉430023

多酚是存在于植物性食物中的一类化合物,具有抗氧化、抗炎和抗肿瘤等生物活性。然而,在食品加工、储藏和消化的过程中,多酚容易遭受外界不利因素(如高温、光照、碱性环境等)的影响而降低甚至丧失生物活性。淀粉基凝胶体系不仅具有天然... 详细信息

多酚是存在于植物性食物中的一类化合物,具有抗氧化、抗炎和抗肿瘤等生物活性。然而,在食品加工、储藏和消化的过程中,多酚容易遭受外界不利因素(如高温、光照、碱性环境等)的影响而降低甚至丧失生物活性。淀粉基凝胶体系不仅具有天然来源多糖类物质良好的生物相容性、可降解性和安全性,而且自身三维网络结构对小分子表现出优异的包封能力和有效的控释作用。近年来,通过不同方式(如3D打印、共价或非共价交联以及作为凝胶填充物)所构建的淀粉基凝胶,在提高多酚类小分子活性成分的稳定性和生物利用率等方面表现出较大的应用前景。本文首先介绍了多酚的生物活性以及自身的局限性,着重探讨了淀粉自身的特性(如糊化、老化、胶凝性等)以及不同交联方式与淀粉基凝胶形成之间的联系,进一步分析了多酚在淀粉基凝胶形成中的作用,以及所构建的淀粉基凝胶对多酚封装和释放性能的影响,在此基础上,对淀粉基凝胶-多酚体系在食品中的应用前景和挑战进行了展望。

关键词：多酚生物活性递送体系淀粉凝胶