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抑尘液滴对煤表面动态润湿特征模拟评估方法

煤炭学报 2024年第4期49卷 1931-1940页

作者：韩方伟彭莹莹张金宜赵月李建辽宁工程技术大学安全科学与工程学院辽宁葫芦岛125105 辽宁工程技术大学矿山热动力灾害与防治教育部重点实验室辽宁葫芦岛125105

在煤体表面喷洒抑尘液是涉煤工业企业常用抑尘手段,而抑尘液滴撞击煤表面的润湿过程对抑尘效果具有重要意义。为研究抑尘液滴在煤表面动态润湿过程以及进一步评估液滴润湿性能,提出了液滴撞击煤表面过程中动态润湿指标,基于CLSVOF数值... 详细信息

在煤体表面喷洒抑尘液是涉煤工业企业常用抑尘手段,而抑尘液滴撞击煤表面的润湿过程对抑尘效果具有重要意义。为研究抑尘液滴在煤表面动态润湿过程以及进一步评估液滴润湿性能,提出了液滴撞击煤表面过程中动态润湿指标,基于CLSVOF数值模拟法研究了液滴在煤表面动态润湿过程;利用无量纲润湿长度和无量纲润湿面积评价该过程中体现的润湿性能,并得出最大无量纲润湿长度与最大无量纲润湿面积相关理论表达,同时与表面张力的润湿性评估能力进行了比较。结果表明:CLSVOF方法能够较好地模拟液滴在煤表面的撞击以及动态润湿过程,可用来评估液滴对煤的动态润湿能力。液滴滴落在煤表面上,首先展铺为圆盘状,达到最大展铺时,圆盘边缘与中心存在速度差。当速度差较小时,液滴回缩汇聚成为一个液滴;当速度差较大时,液滴出现断裂行为,形成许多微小液滴。液滴粒径越大,断裂行为越早出现、现象越明显。一旦液滴在煤表面发生破裂,无量纲润湿长度与无量纲润湿面积并不是保持着一致性变化趋势,无量纲润湿面积评估能力更佳。液滴粒径相同时,撞击煤表面的韦伯数越大,润湿能力越好;相同速度下增加粒径对液滴润湿能力影响较小。与表面张力相比,无量纲润湿长度和无量纲润湿面积具有更好的液滴润湿性评估能力,体现出在润湿剂评价、优选中的潜在应用价值。

关键词：液滴撞击动态润湿无量纲润湿参数润湿性评估 CLSVOF

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高校智慧教育生态体系构建

北京联合大学学报 2024年第1期38卷 7-12页

作者：彭莹莹汪昕宇北京联合大学生物化学工程学院北京100023

智慧教育是教育信息化的最终目标和最高形态,高校作为培养高层次创新人才的主要阵地,应深入推进智慧教育。在分析高校智慧教育内涵及特征的基础上,针对高校智慧教育实践中存在的主要问题,从目标层、运用层、支持层和基础层构建高校智慧... 详细信息

智慧教育是教育信息化的最终目标和最高形态,高校作为培养高层次创新人才的主要阵地,应深入推进智慧教育。在分析高校智慧教育内涵及特征的基础上,针对高校智慧教育实践中存在的主要问题,从目标层、运用层、支持层和基础层构建高校智慧教育生态体系,并从夯实硬件环境建设、强化管理服务平台和整合智慧应用场景等方面提出具体建设内容。

关键词：高校智慧教育生态体系构建智慧学境智慧学态智慧型人才

Carbon‐encapsulated anionic‐defective MnO/Ni open microcages: A hierarchical stress‐release engineering for superior lithium storage

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Carbon Energy 2023年第1期5卷 218-232页

作者： Jia Lin yingying peng Reddivari Chenna Krishna Reddy Akif Zeb Xiaoming Lin Yan-Hui Sun Key Laboratory of Theoretical Chemistry of Environment Guangzhou Key Laboratory of Materials for Energy Conversion and StorageSchool of ChemistryMinistry of EducationSouth China Normal UniversityGuangzhouGuangdongPR China

Rational manipulation of multicomponent materials into a sophisticated architecture is a prerequisite for developing lithium‐ion ***,mechanical diffusion‐induced strain accumulation leads to sluggish diffusion kinetics and anomalous structure instability,further resulting in inferior long‐term cyclability and rate ***,the von Mises stress distribution on open microcages composed of secondary nanoparticles(OCNs)is mechanically investigated by finite element simulation,which elucidates the pronounced stress‐release effect on OCNs ***,a facile metal–organic framework‐derived methodology is proposed for constructing multihierarchical carbon‐encapsulated oxygen vacancy‐enriched MnO/Ni OCNs(OV‐MnO/Ni OCNs).Due to structural and compositional integration,the OV‐MnO/Ni OCNs achieve extraordinary lithium storage performance with excellent reversible capacity(1905.1 mAh g^(−1) at 0.2 A g^(−1)),ultrahigh cycling stability(1653.5 mAh g^(−1) at 2 A g^(−1) up to 600 cycles),and considerable rate capability(463.3 mAh g^(−1) even at 10 A g^(−1)).The primary lithium storage mechanisms are further systematically determined by experimental and theoretical *** enriched oxygen vacancies,metallic Ni configuration,and N‐doped carbonaceous matrix provide more active sites,construct omnidirectional diffusion pathways,suppress volume expansion,and boost electronic conductivity,thus yielding an exceptional diffusivity coefficient and expedited electrochemical *** study offers profound insights for the elaborate design of multicompositional electrodes into a mechanical stress‐release structure toward advanced energy storage application and development.

关键词： DFT calculations finite element simulation lithium-ion batteries metal–organic frameworks oxygen vacancies

Toward calibration-free Mach-Zehnder switches for next-generation silicon photonics

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Photonics Research 2022年第3期10卷 793-801页

作者： Lijia Song Tangnan Chen Weixi Liu Hongxuan Liu yingying peng Zejie Yu Huan Li Yaocheng Shi Daoxin Dai State Key Laboratory for Modern Optical Instrumentation College of Optical Science and EngineeringInternational Research Center for Advanced PhotonicsZhejiang UniversityZijingang CampusHangzhou 310058China International Research Center for Advanced Photonics Zhejiang UniversityHaining 314499China

Silicon photonic Mach–Zehnder switches(MZSs)have been extensively investigated as a promising candidate for optical ***,conventional 2×2 MZSs are usually prone to the size variations of the arm waveguides due to imperfect fabrication,resulting in considerable random phase imbalance between the two arms,thereby imposing significant challenges for further developing next-generation N×N *** we propose a novel design toward calibration-free 2×2 and N×N MZSs,employing optimally widened arm waveguides,enabled by novel compact tapered Euler S-bends with incorporated mode *** standard 180 nm CMOS foundry processes,more than thirty 2×2 MZSs and one 4×4 Benes MZS with the new design are fabricated and *** with their conventional counterparts with 0.45-μm-wide arm waveguides,the present 2×2 MZSs exhibit significant reduction in the random phase *** measured extinction ratios of the present 2×2 and 4×4 MZSs operating in the all-cross state are 27-49 dB and∼20dB across the wavelength range of∼60nm,respectively,even without any *** work paves the way toward calibration-free large-scale N×N MZSs for next-generation silicon photonics.

关键词： free calibration thereby

China-central Asia Energy Cooperation under the Reshaping Global Energy Pattern

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China Oil & Gas 2023年第2期30卷 15-19页

作者： peng yingying Liang Meng CNPC Economics and Technology Research Institute

Central Asia is situated in the heart of Eurasia,playing a central role in the construction of the Silk Road Economic *** the whole,Central Asia has abundant energy resources,with the national economic development of Central Asian countries mainly relying on energy production and exports,while energy supply and imports are crucial for ensuring China’s economic ***,China-Central Asia energy cooperation is highly *** present,the global energy pattern has entered a period of deep *** the new situation,China-Central Asia energy cooperation will be followed by new development opportunities.

关键词： situated cooperation abundant

双创时代背景下构建创新教育生态圈培育实践创新型康复人才的探索

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中国中医药现代远程教育 2024年第3期22卷 178-181页

作者：许明艾坤何运生彭荧荧祁芳周予婧秦爽张泓湖南中医药大学针灸推拿与康复学院湖南长沙410208 湖南中医药大学教务处湖南长沙410208 湖南中医药大学信息科学与工程学院湖南长沙410208

康复是一门多学科交叉的新兴应用型学科,康复从业人员掌握理论知识的同时,更需注重实践运用和综合创新能力的培养,而康复高等教育是培养康复专业人才的基本途径。此文分析了“双创”时代背景下,强化培养康复专业大学生实践创新能力的必... 详细信息

康复是一门多学科交叉的新兴应用型学科,康复从业人员掌握理论知识的同时,更需注重实践运用和综合创新能力的培养,而康复高等教育是培养康复专业人才的基本途径。此文分析了“双创”时代背景下,强化培养康复专业大学生实践创新能力的必要性与存在的问题;探索构建“创新教育生态圈”,培养具有较强实践能力及创新性思维的实践创新型康复专业人才,旨在为构建培养符合时代要求、符合行业需要、符合学生发展的实践创新型康复专业人才的实践模式提供参考。

关键词：创新创业康复教育生态圈

Controlling Three-Step and Five-Step Spin Transitions by Polymorphism in an Fe^(Ⅲ) Spin Crossover Complex

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Chinese Journal of Chemistry 2024年第8期42卷 879-886页

作者： yingying Wu Shuang peng Ziyi Zhang Yue Gao Guangyan Xu Jingwei Dai Zhao-Yang Li Masahiro Yamashita School of Materials Science and Engineering Nankai University38 Tongyan RoadHaihe Educational ParkTianjin300350 China State Key Laboratory of Medicinal Chemical Biology Nankai UniversityTianjin300071 China Department of Chemistry Graduate School of ScienceTohoku UniversitySendai980-8578 Japan

Comprehensive Summary,Regulating spin crossover(SCO)behavior,especially controlling the spin transition steps,is an important scientific issue,mainly because people aim to control spin bistability and ***,SCO bistability can be regulated by changing the ligand-modifying species,non-coordinated anions,guest molecules,and metal-ion ***,the control of multistability is extremely challenging,especially in Fe(III)SCO ***,we report that[FeIII(H-5-Br-thsa)(5-Br-thsa)]·H2O(5-Br-thsa=(5-bromo-2-hydroxybenzylidene)hydrazinecarbothioamide),a compound we have reported before,exists in two polymorphic forms:polymorph 1 exhibits three-step SCO,and polymorph 2 shows five-step SCO,with multi-step SCO behavior effectively regulated by *** to single-crystal and powder X-ray diffractometry,polymorphs 1 and 2 crystallize in different space groups during their spin transitions,with two-step symmetry breaking observed(Pbcn→Pnc2→Pbcn for polymorph 1;P21/n→Pn→P21/n for polymorph 2).We realized that the behavior of these two polymorphs depends significantly on the structure,including(i)the average Fe—N bond distance,(ii)deformation of octahedral FeIII atoms,and(iii)distinct crystal packing,which account for the large differences observed in magnetic properties.

关键词： Spin crossover Multi-step spin transition Symmetry breaking Polymorphism Magnetic property

Knockout of C6orf120 in Rats Alleviates Concanavalin A-induced Autoimmune Hepatitis by Regulating Macrophage Polarization

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Biomedical and Environmental Sciences 2024年第6期37卷 594-606页

作者： Xin Wang Yuqi Wang Hui Liu yingying Lin peng Wang Yunyun Yi Xin Li Department of Center of Integrated Traditional Chinese and Western Medicine Peking University Ditan Teaching HospitalBeijing 100015China Department of Center of Integrated Traditional Chinese and Western Medicine Beijing Ditan HospitalCapital Medical UniversityBeijing 100015China Department of Center of Infectious Disease Beijing Ditan HospitalCapital Medical UniversityBeijing 100015China

Objective The effect of the functionally unknown gene C6orf120 on autoimmune hepatitis was investigated on C6orf120 knockout rats(C6orf120^(-/-))and THP-1 *** Six–eight-week-old C6orf120^(-/-)and wild-type(WT)SD rats were injected with Con A(16 mg/kg),and euthanized after 24 *** sera,livers,and spleens were ***-1 cells and the recombinant protein(rC6ORF120)were used to explore the mechanism in *** frequency of M1 and M2 macrophages was analyzed using flow *** blotting and PCR were used to detect macrophage polarization-associated *** C6orf120 knockout attenuated Con A-induced autoimmune *** cytometry indicated that the proportion of CD68^(+)CD86^(+)M1 macrophages from the liver and spleen in the C6orf120^(-/-)rats decreased.C6orf120 knockout induced downregulation of CD86 protein and the mRNA levels of related inflammatory factors TNF-α,IL-1β,and IL-6 in the liver.C6orf120 knockout did not affect the polarization of THP-1 ***,rC6ORF120 promoted the THP-1 cells toward CD68^(+)CD80^(+)M1 macrophages and inhibited the CD68^(+)CD206^(+)M2 *** C6orf120 knockout alleviates Con A-induced autoimmune hepatitis by inhibiting macrophage polarization toward M1 macrophages and reducing the expression of related inflammatory factors in C6orf120^(-/-)rats.

关键词： C6orf120 Autoimmune hepatitis Macrophage polarization M1 macrophages

Flavonoids from mulberry leaves inhibit fat production and improve fatty acid distribution in adipose tissue in finishing pigs

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Animal Nutrition 2024年第1期16卷 147-157页

作者： yingying Liu Yinglin peng Chen Chen Huibo Ren Ji Zhu Yuan Deng Qingming Cui Xionggui Hu Jianhua He Huali Li Xinghui Zhu Yulong Yin Jun He Yi Xiao College of Animal Science and Technology Hunan Agricultural University Hunan Institute of Animal and Veterinary Science Key Laboratory of Conservation and Genetic Analysis of Local Pig Breed Germplasm Resources College of Information and Intelligence Hunan Agricultural University Institute of Subtropical Agriculture Chinese Academy of Sciences

This study evaluated the effects of flavonoids from mulberry leaves (FML) on plasma biochemical indices,serum activities of lipid metabolism-related enzymes,fat morphology,fatty acid composition,and lipid metabolism in different adipose tissues of finishing *** used 120 Chinese hybrid barrows of Berkshire and Bama mini-pigs with an average initial body weight of 45.11±4.23 *** pigs were randomly assigned to five treatment groups and fed a control diet based on corn,soybean meal,and wheat bran or a control diet supplemented with 0.02%,0.04%,0.08%,or 0.16%*** experimental group had six replicates (pens),with four pigs per *** a 7-d adaptation period,the feeding trial was conducted for 58 *** and adipose tissue samples were collected from 30 pigs (one pig per pen)at the end of the *** results showed that FML supplementation significantly decreased the feed intake to body gain ratio,the plasma concentrations of total cholesterol and free fatty acids,and the serum activity of 3-hydroxy-3-methylglutaryl coenzyme A reductase (linear or quadratic effects,P<0.05),and decreased the plasma triglyceride concentration (quadratic,P=0.07).Increasing FML supplementation increased the average daily gain and serum activities of lipoprotein lipase (linear and quadratic effects,P<0.05) and adipose triglyceride lipase (linear,P<0.05).Dietary FML supplementation decreased the adipocyte area in the dorsal subcutaneous adipose (DSA) tissue of finishing pigs (linear,P=0.05) and increased the adipocyte area in the visceral adipose tissue (quadratic,P<0.01).Increasing FML supplementation decreased the C20:1 content in DSA,abdominal subcutaneous adipose,and visceral adipose tissues of finishing pigs (P<0.05) and increased the C18:3n3 and n-3 PUFA contents(P<0.05).The lipid metabolism genes were regulated by the PPARγ-LXRa-ABCA1 signaling pathway,and their expressions differed in different adipose *** findings suggest that FML improved growth performance,reg

关键词： Finishing pig Mulberry leaf Flavonoid Lipid metabolism Fatty acid Lard