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Journal of Thermal Science 2025年第1期34卷 34-49页

作者： WANG Shuang MU Lin LI Xue xie jun DONG Ming School of Energy and Power Engineering Dalian University of Technology School of Optical Information and Energy Engineering Wuhan Institute of Technology School of Energy and Environment Shenyang Aerospace University

Turbulent agglomeration is viewed as a promising technology for enhancing fine particle removal *** better understand particle transport,agglomeration behaviors,and fluid-particle interactions,we numerically explored these phenomena under cylindrical vortex wake influence using a coupled large eddy simulation and discrete element method（LES-DEM） *** validity of the LES approach was verified by comparison with available direct numerical simulation（DNS） *** adopted the Johnson-Kendall-Roberts（JKR） contact model for particle-particle *** particle dispersion and agglomeration characteristics of particles with different diameters（dp=2-20 μm） in the laminar and transition of shear layer（TrSL） flow regimes were *** particles were concentrated at the vortex centers,while larger particles accumulated around the *** agglomeration efficiency exhibited an M-shaped profile spanwise（y-direction）.With increasing Reynolds number,the agglomeration efficiency and turbulence intensity *** particle agglomeration efficiency peaks at a certain Reynolds ***,at higher Reynolds numbers,reducing the residence time of particles in the flow field decreases the agglomeration efficiency.

关键词： discrete element method large eddy simulation microparticle particle agglomeration

Thickness and sp3 bond modulation of（Ti/tetrahedral amorphous carbon）_n multilayer coatings

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Tungsten 2025年第1期7卷 152-160页

作者： Zhi-jun xie Jia-Lin Li Ling Gong Xiang-Li Zhong Hong-Jia Song Jin-Bin Wang National-Provincial Laboratory of Special Function Thin Film Materials School of Materials Science and Engineering Xiangtan University

The durability of wear-resistant tetrahedral amorphous carbon（ta-C） coatings is intimately linked to their thickness and the concentration of *** enhance the lifespan of the coatings,we have prepared a multilayer coating consisting of alternating layers of Ti and ta-C,denoted as（Ti/ta-C）_n,using arc ion plating.A multi-layer structure in conjunction with stage cooling is employed to enhance the thickness and promote *** results indicate that the ID/IGvalue,representing the ratio of the intensity of the D peak to that of the G peak in Raman spectroscopy,decreases from 0.85 when no stage cooling is applied to 0.35 when stage cooling is employed,suggesting an enhancement in the fraction of sp3bonds within the *** obtained（Ti/ta-C）_n multilayer coating without peeling off has a maximum thickness of 1.14 μm,which is almost double that of the ta-C coating single layer *** the same time,the coating has a low coefficient of friction,down to 0.069,and maintains excellent friction properties with a wear rate of 3.4×10-6mm3·N-1·*** results conclusively show that the preparation technology can enhance both thickness and sp3bonding in ta-C coatings,significantly expanding their utility across tools,molds,and precision engineering components.

关键词： Arc ion plating Multilayer structure sp3 bond Ta-C coating Wear resistance

Recent progress on discovery of novel phosphors for solid state lighting

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Journal of Rare Earths 2020年第5期38卷 464-473页

作者： Xuefang Luo Rong-jun xie College of Materials Xiamen UniversityXiamen 361005China

Luminescent materials play indispensable roles in many application areas such as lighting,advanced displays,bio-imaging,medical treatments,sensing and *** new luminescent materials with improved or desired properties is an endless mission,driven by increasing demands of advances in technologies and *** traditional trial-and-error method,usually based on intensive experiments,cannot search for new materials in a fast and efficient way,therefore alternative model-or theory-based approaches for materials discovery need to be *** this work we overviewed several promising methods for screening and discovering novel luminescent materials,including solid state combinatorial chemistry,chemical unit substitution,single particle diagnosis and high-throughput *** methods,having their own merits and demerits,enable to search for new phosphor materials with interesting properties for white light-emitting diodes(wLEDs)rapidly and ***,data-driven discovery of materials is emphasized as a state-of-art approach.

关键词： Phosphor Solid-state lighting High throughput calculations Photoluminescence Combinatorial chemistry Single crystal

Harnessing generative AI to decode enzyme catalysis and evolution for enhanced engineering

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National Science Review 2023年第12期10卷 13-25页

作者： Wen jun xie Arieh Warshel Department of Medicinal Chemistry Center for Natural Products Drug Discovery and DevelopmentGenetics InstituteUniversity of Florida Department of Chemistry University of Southern California

Enzymes, as paramount protein catalysts, occupy a central role in fostering remarkable progress across numerous fields. However, the intricacy of sequence-function relationships continues to obscure our grasp of enzyme behaviors and curtails our capabilities in rational enzyme engineering. Generative artificial intelligence(AI), known for its proficiency in handling intricate data distributions, holds the potential to offer novel perspectives in enzyme research. Generative models could discern elusive patterns within the vast sequence space and uncover new functional enzyme sequences. This review highlights the recent advancements in employing generative AI for enzyme sequence analysis. We delve into the impact of generative AI in predicting mutation effects on enzyme fitness, catalytic activity and stability, rationalizing the laboratory evolution of de novo enzymes, and decoding protein sequence semantics and their application in enzyme engineering. Notably, the prediction of catalytic activity and stability of enzymes using natural protein sequences serves as a vital link, indicating how enzyme catalysis shapes enzyme evolution. Overall,we foresee that the integration of generative AI into enzyme studies will remarkably enhance our knowledge of enzymes and expedite the creation of superior biocatalysts.

关键词： generative AI mutation effects evolution–catalysis relationship enzyme engineering enzyme evolution

Light-emitting diodes:brighter NIR-emitting phosphor making light sources smarter

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Light(Science & Applications) 2020年第1期9卷 539-540页

作者： Rong-jun xie College of Materials Xiamen UniversityXiamen361005 FujianChina

A brighter near-infrared(NIR)phosphor is achieved by inhibiting the oxidation of Cr3+and reducing the surface defects of phosphor particles,enabling the realization of smarter and more sensitive light sources for nigh... 详细信息

关键词： realization light smart

The convergence on spectrum of sample covariance matrices for information-plus-noise type data

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Applied Mathematics(A Journal of Chinese Universities) 2012年第2期27卷 181-191页

作者： xie jun-shan Department of Mathematics Zhejiang UniversityHangzhou 310027China College of Mathematics and Information Henan UniversityKaifeng 475000China

In this paper,we consider the limiting spectral distribution of the information-plus-noise type sample covariance matrices Cn=1/N（Rn＋σXn）（Rn＋σXn）,under the assumption that the entries of Xn are independent but non-identically distributed random *** is proved that,almost surely,the empirical spectral distribution of Cn converges weakly to a non-random distribution whose Stieltjes transform satisfies a certain *** result extends the previous one with the entries of Xn are *** varibles to a more general *** proof of the result mainly employs the Stein equation and the cumulant expansion formula of independent random variables.

关键词： limiting spectral distribution sample covariance matrix Stieltjes transform.

PROMOTING SILTATION EFFECTS AND IMPACTS OF HENGSHA EAST SHOAL ON THE YANGTZE RIVER ESTUARY

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Journal of Hydrodynamics 2011年第5期23卷 649-659页

作者： xie jun YAN Yi-xin College of Harbor Coastal and Offshore Engineering Hohai University Nanjing 210098 China Shanghai Waterway Engineering Design and Consulting Co. Ltd Shanghai 200120 China

For the Hengsha East Shoal Promoting Siltation Project in the Yangtze River Estuary, this work developed a formula for calculating sediment carrying capacity based on variable coefficients and a mathematical model for suspended sedimentation using variable saturation recovery coefficients. Not only does the model yield good verification, preferably give the hydrodynamics and the sediment concentration, but also reach a good agreement between the simulation results andlux by tide for studying the effect the measured topographical changes in the promoting siltation zone of the Hengsha East Shoal. Moreover, this article proposes a method for examing the net sediment tran- sportation fs of the project of promoting siltation and comparatively analyzes the current siltation of the Hengsha East Shoal and siltation mouth layouts, entrance widths, entrance bottom elevations, and the impact of the South Main Dike on promoting siltation through calculating the net sediment transportation flux by tide over the fixed bed and the direct movable bed numerical simulations. The results are in good agreement with each other, indicating that the method for calculating the net sedi- ment transportation flux by the tide is also useful for assessing the project in promoting siltation. Finally, we use the modeling results to analyze the water and sediment diversion ratios and the changes in silting and scouting in riverbeds and draw the conclusion that the completion of the Hengsha East Shoal Promoting Siltation Project would not adversely affect the Yangtze River Estuary Deepwater Channel Project.

关键词： Hengsha East Shoal promoting siltation effects mathematical simulation sediment diversion ratio net sediment transportation flux

扣囊复膜酵母麸曲制备及其在小曲白酒中的应用

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食品科学 2025年第1期46卷 56-63页

作者：刘霄黄治国卫春会任志强谢军邓杰四川轻化工大学酿酒生物技术及应用四川省重点实验室四川宜宾644000 中国轻工业酿酒生物技术及智能制造重点实验室四川宜宾644000

为提高小曲白酒中乙酸乙酯的含量,以大曲中分离的一株产酯能力较强的扣囊复膜酵母M1为出发菌株,将其制备为麸曲(M1麸曲)并用于小曲白酒酿造,分析M1麸曲强化发酵对小曲白酒挥发性风味组分的影响。结果表明:M1麸曲最佳培养条件为:水分质... 详细信息

为提高小曲白酒中乙酸乙酯的含量,以大曲中分离的一株产酯能力较强的扣囊复膜酵母M1为出发菌株,将其制备为麸曲(M1麸曲)并用于小曲白酒酿造,分析M1麸曲强化发酵对小曲白酒挥发性风味组分的影响。结果表明:M1麸曲最佳培养条件为:水分质量分数40%、培养温度28℃、麸皮初始酸度6 mmol/100 g、培养时间48 h;酿造实验结果显示,添加M1麸曲显著提高了实验组(K组)乙酸和乙酸乙酯的含量(P<0.05),极显著降低了异丁醇和异戊醇的含量(P<0.01);通过对微生物群落结构的分析表明,对照组和K组酒醅的微生物群落演替规律存在差异,K组扣囊复膜酵母属和魏斯氏菌属相对丰度增加;同时通过PICRUSt2功能预测分析,验证了K组参与乙酸和乙酸乙酯代谢的酶丰度更高。通过麸曲为介质将扣囊复膜酵母M1应用到小曲发酵可有效提高小曲白酒乙酸乙酯的含量,对提高小曲白酒质量具有一定参考意义。

关键词：扣囊复膜酵母麸曲小曲白酒挥发性物质

Role of the Λ(1600) in the K^-p→Λπ^0π^0 reaction

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Communications in Theoretical Physics 2020年第4期72卷 64-70页

作者： He Zhou Ju-jun xie Institute of Modern Physics Chinese Academy of SciencesLanzhou 730000China School of Nuclear Science and Technology University of Chinese Academy of SciencesBejing 101408China School of Physics and Microelectronics Zhengzhou UniversityZhengzhouHenan 450001China

Role of theΛ(1600)is studied in the K^-p→Λπ^0π^0 reaction by using the effective Lagrangian approach near the *** perform a calculation for the total and differential cross sections by considering the contributions from theΛ(1600)andΛ(1670)intermediate resonances decaying intoπ^0∑^*0(1385)with∑^*0(1385)decaying intoπ^0Λ.Additionally,the non-resonance process from u-channel nucleon pole is also taken into *** our model parameters,the current experimental data on the total cross sections of the K^-p→Λπ^0π^0 reaction can be well *** is shown that we really need the contribution from the A(1600)with spin-parity J^P=1/2^+,and that these measurements can be used to determine some of the properties of theΛ(1600)***,we also plot theπ0Λinvariant mass distributions which could be tested by the future experimental measurements.

关键词： KN scattering effective Lagrangian approach hyperon resonance

Research on assessment method of intrasystem and intersystem of the global navigation satellite system

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Science China(Technological Sciences) 2015年第10期58卷 1672-1681页

作者： ZHANG Jianjun XUE Ming xie jun China Academy of Space Technology Qian Xuesen Laboratory of Space Technology

The global navigation satellite system(GNSS) has become an important space infrastructure. Following GPS and GLONASS, Europe and China have been building their own global navigation satellite system, respectively, GALILEO and Compass. In order to consolidate the leadership of GPS in the globe, United States is gradually upgrading the traditional GPS. Simultaneously, Russia is also intensively restoring full performance of GLONASS. With the advancement of international satellite navigation system, satellite navigation frequency resources are already in short supply, and the design and use of the navigation signals are more sophisticated and complex due to commercial, disaster relief and other reasons. Since there may be many navigation signals in the same basic bandwidth, the coexistence of multiple systems and the combined application make intersystem mutual interference become the focus research. Under this background, the satellite navigation system mutual interference evaluation system needs to be established urgently to meet and support the compatibility and interoperability of the GNSS system. In the paper, through the performance analysis of the GNSS signal acquisition, carrier tracking, data demodulation and code tracking, the equivalent carrier to noise ratio model based on spectrum isolation coefficient is established, and the theoretical system of the GNSS signal mutual interference is proposed according to the mechanism, and the mutual interference of GPS, GALILEO and Compass system is analyzed and assessed.

关键词： GNSS intrasystem interference intersystem interference equivalent carrier to noise ratio