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A CA-LBM model for simulating dendrite growth with forced convection

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Journal of Iron and Steel Research International 2021年第8期28卷 997-1008页

作者： Xiang-ning meng Lei Cui Yi-han Shi Miao-yong Zhu Key Laboratory for Ecological Metallurgy of Multi-Metallic Ores Northeastern UniversityShenyang 110819LiaoningChina School of Metallurgy Northeastern UniversityShenyang 110819LiaoningChina

A two-dimensional coupled model of the cellular automaton(CA)and the lattice Boltzmann method(LBM)was developed to simulate the solute dendrite growth of Fe-C-Mn-S alloy in the presence of forced *** model describes the transport phenomenon by the evolution of moving pseudo-particles distribution functions and utilizes the LBM to solve fluid flow and solute transport under forced convection *** on the solute field calculated by the CA technique,the dynamics of dendrite growth were determined by the previously proposed local solute balance *** accuracy of the forced convection dendrite growth model was verified by comparing the CA-LBM model with Lipton-Glicksman-Kurz analytical *** is revealed that the dendrite symmetry structure is destroyed compared to free diffusion,and the upstream arm is more developed than the downstream arm of the *** enriched solute segregates more at the downstream side than at the upstream side of the *** length of the upstream dendrite arm increases firstly and then becomes stable with the increase in the flow velocity,the dendrite necking is restrained,and the vertical dendrite arm becomes longer.

关键词： Two-dimensional coupled model Cellular automaton Lattice Boltzmann method Dendrite growth Forced convection

“现代性”的路还有多长——近期中篇小说创作的一个方面

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当代文坛 2025年第1期 4-14页

作者：孟繁华沈阳师范大学中国文化与文学研究所

现代性主要是西方几个世纪前缔造的。中国为了回应西方的现代性产生了中国的现代性,它带来了巨大的希望和可能性,同时也有允诺迟迟不临的虚幻性。我们已经看到,一心向西方学习的倾向正在发生变化。就当前的创作而言,中篇小说非常注意“... 详细信息

现代性主要是西方几个世纪前缔造的。中国为了回应西方的现代性产生了中国的现代性,它带来了巨大的希望和可能性,同时也有允诺迟迟不临的虚幻性。我们已经看到,一心向西方学习的倾向正在发生变化。就当前的创作而言,中篇小说非常注意“中国性”也就是本土性的开拓和建构,呈现出多元并存、竞相开放的新格局。我们也要注意的是,西方缔造的这个“现代性”,正在把我们抛进一个越来越说不清楚的困境中,我们长久渴望的东西居然像幻觉一样虚无缥缈。质疑和反思“现代性”,重视本土性的开拓和建构,这从一个方面表达了当下文学“反现代”的现代性。这是特别值得我们注意的文学潮流或现象。

关键词：中篇小说现代性本土性幻觉性

Visualization of the protective role of estrogen against female liver fibrosis via an ER viscosity NIR fluorescent probe

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Science China Chemistry 2025年第1期 360-368页

作者： Zheng Liu Changyu Zhang Zipeng Li Wanying Ma Jia Liu Xiang Xia ning Xu Wen Sun Jianjun Du Jiangli Fan Xiaojun Peng State Key Laboratory of Fine Chemicals Dalian University of Technology ningbo Institute of Dalian University of Technology

Endoplasmic reticulum(ER) viscosity has emerged as a new potential biomarker for hepatic fibrosis(HF). Herein, we report the first ER-targeting viscosity-responsive near-infrared(NIR) fluorescent probe HBT-PP for investigations of HF *** twisted intramolecular charge transfer(TICT) and the excited state intramolecular proton transfer(ESIPT) are combined to endow HBT-PP with the selective response towards viscosity(～62-fold) and a super large stokes shift(～320 nm). HBT-PP mainly targets organelle ER and is able to image the drug-or alcohol-induced viscosity elevation in living cells. Significantly,HBT-PP was successfully applied to visualize the gender difference in HF and the protective role of estrogen in restraining HF progression. Of note, after 10 min of stain with HBT-PP, HF lesions showed a stage-based response, indicating the potential of this probe in fast and early diagnosis of HF. These results clearly demonstrated the promising application of HBT-PP as a new tool for exploring ER viscosity-involved physiological and pathological processes.

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文明叙事:习近平文化思想的方法论审视

新疆师范大学学报（哲学社会科学版） 2025年第1期46卷 34-42页

作者：张明谷生秀南京大学马克思主义学院江苏南京210023

文明是中国共产党百余年推进马克思主义中国化时代化的核心线索,文明叙事是中国共产党历史叙事的重要维度,也是习近平文化思想的重要方法论。习近平文化思想的深厚文明意蕴体现在四个方面:一是从历史纵深出发把握“走自己的路”的文明基... 详细信息

文明是中国共产党百余年推进马克思主义中国化时代化的核心线索,文明叙事是中国共产党历史叙事的重要维度,也是习近平文化思想的重要方法论。习近平文化思想的深厚文明意蕴体现在四个方面:一是从历史纵深出发把握“走自己的路”的文明基因,即从中华5000多年文明的历史传承中把握中国道路的来龙去脉及其内在逻辑必然;二是以“第二个结合”为根本方法,重塑发展中华文明的使命担当,不断推动建设中华民族现代文明实现传统文明的现代新生;三是坚守文明超越理念,将新文明的建构与中国式现代化的现实实践相互关联,以中国式现代化创造人类文明新形态,打破西方以资本逻辑为核心的形而上学抽象文明观的历史困境;四是坚持文明交流互鉴,推动落实全球文明倡议,构建人类文明交往新范式。

关键词：习近平文化思想文明叙事 “走自己的路” “第二个结合” 文明交流互鉴

Surveying the electrocatalytic CO_(2)-to-CO activity of heterogenized metallomacrocycles via accurate clipping at the molecular level

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Nano Research 2022年第12期15卷 10070-10077页

作者： meng-Ke Hu ning Wang Dong-Dong Ma Qi-Long Zhu State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences(CAS)Fuzhou350002China College of Chemistry Fuzhou UniversityFuzhou350002China Fujian Science&Technology Innovation Laboratory for Optoelectronic Information of China Fuzhou350108China

Heterogenized phthalocyanine-based molecular catalysts are the ideal electrocatalytic platforms for CO_(2)reduction reaction(CO_(2)RR)because of their well-defined structures and potential *** addition to the pursuit of catalytic performances at industrial potentials,it is equally important to explore experimental rules and design considerations behind activity and ***,we successfully developed a series of nickel phthalocyanines(NiPcs)with different alkyl chains immobilized on multi-walled carbon nanotubes(CNT)to unveil the structure-performance relationship for electrocatalytic CO_(2)RR in neutral ***,a volcano-type trend was found between the activity for CO_(2)-to-CO conversion and alkyl chain lengths of NiPcs on *** results further indicate that their electrocatalytic CO_(2)RR activities are highly related to the molecular dispersion and the heterointerfacial charge transfer capability adjusted by the alkyl ***,the optimized electrocatalyst via accurate clipping at the molecular level exhibits an ultrahigh activity with Faradaic efficiency of CO up to 99.52%.

关键词： nickel phthalocyanines carbon nanotubes CO_(2)reduction reaction alkyl chains structure-performance relationship

Palladium installed copper-organic framework for C–C coupling reactions

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Science China Chemistry 2025年

作者： Yu-Mei Wang Mei-Xia Tao Kai-Ming Mo Xu Chen Shu-Hua Zhong Elena S Shubina Guo-Hong ning Dan Li College of Chemistry and Materials Science Guangdong Provincial Key Laboratory of Supramolecular Coordination ChemistryJinan University A.N.Nesmeyanov Institute of Organoelement Compounds Russian Academy of Sciences

The formation of C–C bonds is a crucial aspect of organic synthesis. Synthesists' long-term objective is to identify novel catalysts to optimize reaction systems based on traditional transition metal catalysis. This study explores the synthesis and catalytic potential of palladium-installed covalent metal-organic frameworks(CMOFs) based on copper cyclic trinuclear units(Cu-CTUs). By incorporating palladium ions into the imine-based framework JNM-7 through a straightforward immersion method, we achieved a notable enhancement in catalytic activity for critical C–C coupling reactions, including C–H arylation and Sonogashira cross-coupling. The resulting JNM-7-Pd demonstrated remarkable stability and recyclability, maintaining its efficiency over at least three cycles without any decline in efficiency.

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A long noncoding RNA involved in rice reproductive development by negatively regulating osa-miR160

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Science Bulletin 2017年第7期62卷 470-475页

作者： meng Wang Hua-Jun Wu Jun Fang Chengcai Chu xiu-Jie Wang State Key Laboratory of Plant Genomics Institute of Genetics and Developmental BiologyChinese Academy of Sciences Northeast Institute of Geography and Agroecology Key Laboratory of Soybean Molecular Design BreedingChinese Academy of Sciences

Long noncoding RNAs （IncRNAs） participate in the regulation of multiple biological processes via diverse manners, one of which is functioning as endogenous target mimics （eTMs） to modulate microRNAs （miRNAs） by competing for their targets. Previously, we have predicted one IncRNA （osa-eTM160） as an endogenous repressor of osa-miR160 and validated the target mimicry ability of osa-eTM160 for ath-miR160 in Arabidopsis thaliana, yet the functions of osa-eTM160 in rice remain obscure. Here, we demonstrated that osa-eTM160 attenuated the repression of osa-miR160 on osa-ARF18 mRNAs during early anther developmental stages through the target mimicry manner, therefore to regulate rice seed setting and seed size. These findings revealed the roles of osa-eTM160 in rice, and indicated that lncRNAs with eTM functions may serve as temporal regulators to modulate the effects of miRNAs at specific developmental stages.

关键词： microRNA IncRNA miR160 Target mimic

Dependence of Deformation Twinning on Grain Orientation and Texture Evolution of High Manganese TWIP Steels at Different Deformation Temperatures

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Journal of Iron and Steel Research International 2011年第11期18卷 46-52页

作者： FANG xiu-hui YANG Ping LU Fa-yun meng Li School of Materials Science and Engineering University of Science and Technology Beijing Beijing 100083 China

Mechanical properties, microstructure and texture evolution were studied in two tensile-deformed high manganese TWIP steels at different temperatures. Special attention was paid to the effects of deformation tempera- ture and grain orientation on twinning behavior. The results showed that, at --70 ℃ and at room temperature, both twins and hexagonal martensite were found in a lower manganese steel of 26Mn. With deformation temperature ris- ing, twins became less and they disappeared at 500 ℃. Strong 〈111〉 texture appeared at 300 ℃, while it weakened at 500 ℃ due to the low strain rate and higher stacking fault energy. EBSD measurement revealed the dependence of deformation twinning on grain orientation at all test temperatures.

关键词： high manganese steel warm deformation TWIP effect texture

Mercury pollution in Rana Chensinensis in Weisha River reach, in the upstream region of Songhua River

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Chinese Science Bulletin 2005年第19期50卷 2166-2170页

作者： WANG ning ZHU Yanming meng Dan College of Urban and Environmental Sciences of Northeast Normal University Changchun 130024 China Northeast Institute of Geography and Agricultural Ecology Chinese Academy of Sciences Changchun 130021 China

Twice a year continuous samples of Rana Chensinensis and sediments have been collected near gold mine in the upstream region of Songhua River from 2000 to 2002, for analyzing the total mercury (THg), methylmercury (MeHg) concentration and correlation in sediments, muscles, livers of the frog. The study indicates that THg and MeHgconcentrations in polluted samples near the gold mine are higher than those in unpolluted ones. THg and MeHg con-centrations are higher in autumn, in female, and in livers than those in spring, in male, in muscles respectively. The order of concentration degree in the frog organizations is as follows: liver>muscle>ovum>Fallopian tube. MeHg is themain form of mercury (Hg) existing in autumn, while inor-ganic Hg is in spring. There is no distinct difference ofCMeHg/CTHg between male and female, livers and muscles. The correlation between MeHg concentrations in the river sedi-ments and in the frog’s livers and muscles are significant, which is related to disorderly discharge of Hg.

关键词：水银污染甲基水银河流污染沉淀物松花江