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World Journal of Gastroenterology 2024年第1期30卷 9-16页

作者： Jin-Lei Wang Jia-Ping Yan Jia-Ru Fan Xiang Li Xu Guo Jia-Wei Li yun-Xiaojian Wu Jing-Jie Wang yu-lu chen Li Li Cong Lin Xin-Liang Qu Ji-Hong Liu Yan-Liang Zhang Ying-Yi yuan Hua-Ge yu yu-Xi chen Yi-Xuan Cai Xiang-Di Zhang Si Zhao Zi-Hang Xu Li Ma Na Ma Diao-Mei Guo Lian-Sheng Ma Baishideng Publishing Group Inc PleasantonCA 94566United States

In 2023,Baishideng Publishing Group(Baishideng)routinely published 47 openaccess journals,including 46 English-language journals and 1 Chinese-language *** successes were accomplished through the collective dedicated efforts of Baishideng staffs,Editorial Board Members,and Peer *** these 47 Baishideng journals,7 are included in the Science Citation Index Expanded(SCIE)and 6 in the Emerging Sources Citation Index(ESCI).With the support of Baishideng authors,company staffs,Editorial Board Members,and Peer Reviewers,the publication work of 2023 is about to be successfully *** editorial summarizes the 2023 activities and accomplishments of the 13 SCIEand ESCI-indexed Baishideng journals,outlines the Baishideng publishing policy changes and additions made this year,and highlights the unique advantages of Baishideng journals.

关键词： Baishideng Publishing Group Journal Impact Factor Open access Policy changes Policy additions Unique advantages Anxiety disorders Colorectal cancer Inflammatory bowel disease Hepatocellular carcinoma Gut microbes Atrial fibrillation

成渝地区双城经济圈要素流动障碍水平测度及影响因素

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自然资源学报 2024年第4期39卷 897-911页

作者：张扬陈雨露王兴平龚杰姬萌荣赵晶晶东南大学建筑学院南京210096 成都理工大学地理与规划学院成都610059 自然资源部国土空间智能规划技术重点实验室上海200092 成都市经济发展研究院成都610072 重庆工商大学公共管理学院重庆400067 深圳大学建筑与城市规划学院深圳518060

促进城市群要素自由有序流动,提高资源配置效率是双循环背景下推动高质量发展的必然要求。以成渝地区双城经济圈为研究区,集成百度人口迁徙、快递物流网络、百度指数等多源大数据建立要素流动强度实测方法,利用修正引力模型模拟自然状... 详细信息

促进城市群要素自由有序流动,提高资源配置效率是双循环背景下推动高质量发展的必然要求。以成渝地区双城经济圈为研究区,集成百度人口迁徙、快递物流网络、百度指数等多源大数据建立要素流动强度实测方法,利用修正引力模型模拟自然状态下要素流动强度,构建要素流动障碍指数测度城市间要素流动障碍水平,并借助QAP回归分析探讨要素流动障碍的影响因素。结果表明:(1)在实测要素流和模拟要素流网络中,重庆—成都关联区间要素流动强度最高,两市与其他地级市组成的关联区间次之,均高于其他地级市组成的关联区间。(2)四川省内大多数城市之间的要素流动存在促进作用,而重庆市与四川省内大多数城市之间的要素流动存在阻碍作用。(3)成渝地区双城经济圈要素流动障碍水平受体制、社会、政策、设施、空间等多方面因素的共同影响,行政分割、城乡结构差异易形成城市间要素流动壁垒;道路设施互联互通、空间邻近有助于促进要素在城市间的高效流动,而行政级别高的中心城市对要素流动具有较强的支配作用。据此,针对破除成渝地区双城经济圈要素流动障碍,提出若干对策建议。

关键词：要素流动障碍流空间改进引力模型 QAP 成渝地区双城经济圈

Numerical studies on four-engine rocket exhaust plume impinging on flame deflectors with afterburning

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Defence Technology（防务技术） 2021年第4期17卷 1207-1216页

作者： Zhi-tan Zhou Chang-fang Zhao chen-yu lu Gui-gao Le School of Mechanical Engineering Nanjing University of Science and TechnologyNanjing210094China

This paper studies the four-engine liquid rocket flow field during the launching *** threedimensional compressible Navier-Stokes equations and two-equation realizable k-epsilon turbulence model,an impact model is established and flow fields of plume impinging on the two different shapes of flame deflectors,including wedge-shaped flame deflector and cone-shaped flame deflector,are *** finite-rate chemical kinetics is used to track chemical *** simulation results show that afterburning mainly occurs in the mixed *** the region of peak pressure occurs directly under the rocket nozzle,which is the result of the direct impact of exhaust *** with the wedgeshaped flame deflector,the cone-shaped flame deflector has great performance on guiding exhaust *** wedge-shaped and cone-shaped flame deflectors guide the supersonic exhaust plume away from the impingement point with two directions and circumferential direction,*** maximum pressure and temperature on the wedge-shaped flame deflector surface are 37.2%and 9.9%higher than those for the cone-shaped flame *** results provide engineering guidance and theoretical significance for design in flame deflector of the launch platforms.

关键词： Four-engine rocket Afterburning Impinging flow field Different deflectors Numerical simulations

Efficient synthesis of 5,6-dihydrothieno[3′,2′:4,5]-thieno[2,3-d]pyrimidin-4(3H)-ones via an iminophosphorane

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Chinese Chemical Letters 2009年第9期20卷 1055-1058页

作者： yu lu chen Yi Bo Nie Ming Wu Ding Key Laboratory of Pesticide & Chemical Biology of Ministry of Education Central China Normal University Wuhan 430079 China Department of Biology Xianning Vocational and Technical College Xianning 437100 China

5,6-Dihydrothieno[3＇,2＇：4,5]thieno[2,3-d]pyrimidin-4（3H）-ones 6 were synthesized in yields of 71-87% by a consecutive method, which includes aza-Wittig reaction of iminophosphorane 3 with aromatic isocynate to give carbodiimide 4 and subsequent reaction of 4 with various amines, phenols or alcohols in the presence of catalytic amount of sodium ethoxide or solid potassium carbonate. 2009 Ming Wu Ding. Published by Elsevier B.V. on behalf of Chinese Chemical Society. All rights reserved.

关键词： 5,6-Dihydrothieno[3r,2':4,5]thieno[2,3-d]pyrimidin-4(3//)-one Iminophosphorane Aza-Wittig reaction Carbodiimide Isocyanate

Cooperative game penetration guidance for multiple hypersonic vehicles under safety critical framework

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Chinese Journal of Aeronautics 2024年第1期37卷 247-255页

作者： Jieqing chen Ruisheng SUN yu lu School of Energy and Power Engineering Nanjing University of Science and TechnologyNanjing 210094China

The rapid development of the anti-missile weapon technology brings new challenges to the cooperative penetration strategy solution and the guidance law design for Hypersonic Vehicles(HVs).This paper studies the coordinated game penetration guidance problem for multiple hypersonic vehicles faced with space threat areas.A scheme for seeking cooperative game penetration guidance strategy under safety critical control framework is *** this scheme,a multiHV cooperative game model is proposed in a minimum optimization form which can simplify the solving process and accelerate the computing ***,a second-order control barrier function is developed to transform the implicit nonlinear constraints of the proposed model into linear *** order to obtain better performance of guidance strategy,a composite guidance law under the safety critical control framework is presented to allocate guidance strategies appropriately in the whole *** is shown that the proposed scheme can guarantee successful penetration while avoiding threat ***,a comparative simulation with a two-on-three game is conducted to verify the effectiveness of the proposed method.

关键词： Hypersonic vehicles Safety critical control Penetration game Space constraints Cooperative guidance

Effects of casting current on structure and properties of a nanostructured Zr-Cu-Fe-Al bulk metallic glass

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Journal of Iron and Steel Research International 2018年第6期25卷 630-636页

作者： Si-nan Liu Wei-xia Dong chen-yu lu Zhu-wei lu Jia-cheng Ge chen-chen yuan Bao-an Sun Tao Feng Xun-li Wang Si Lan Herbert Gleiter Institute of Nanoscience School of MaterialsScience and Engineering Nanjing University of Science andTechnology Nanjing 210094 Jiangsu China Department of Physics City University of Hong KongHong Kong China School of Materials Science and Engineering SoutheastUniversity Nanjing 211189 Jiangsu China

The effects of casting currents on the thermophysical behaviors, atomic and nanoscale structure, and mechanical properties of two Zr-based-bulk metallic glasses, i.e., Zr59Cu33A18 and Zr59（Cuo.55Feo.45）33A18, were studied by using differential scanning calorimetry, wide-angle X-ray diffraction, and small-angle X-ray scattering, as well as compression tests. The casting currents can be tuned to change the casting initiative temperature. Results revealed that there is no anomalous structural change for the Zr59Cu33A18 molten liquid before crystallization during cooling with different casting currents. In contrast, liquid-state phase separation was suggested to occur in the Zr59（Cuo.55Feo.45）33A18 molten liquid prepared using lower casting current before crystallization during cooling. The position shift of the first sharp diffraction peak for the diffraction pattern of Zr59（Cuo.55Feo.45）33A18 shows that the density of the molten liquid may decrease upon cooling at different casting currents. The small-angle X-ray scattering results indicate that the heterogeneity of the Zr59（Cuo.55- ***）33A18 metallic glasses increases with decreasing the casting temperature. As a result, the metallic glasses with a liquid-state phase separation possess better mechanical properties, including higher-yielding stress and more significant compressive ductility. The increase in degree of heterogeneity formed by nanoscale liquid-state phase separation and their interactions with the shear bands for the Zr-Cu-Fe-Al bulk metallic glasses were suggested to be responsible for the enhanced mechanical properties.

关键词： Bulk metallic glass Liquid-state phase separation Wide-angle X-ray diffraction Small-angle X-rayscattering Structure heterogeneity

Distribution and accumulation of zinc and nitrogen in wheat grain pearling fractions in response to foliar zinc and soil nitrogen applications

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Journal of Integrative Agriculture 2021年第12期20卷 3277-3288页

作者： ZHANG Pan-pan chen yu-lu WANG chen-yang MA Geng lu Jun-jie LIU Jing-bao GUO Tian-cai State Key Laboratory of Wheat and Maize Crop Science Henan Agricultural UniversityZhengzhou 450002P.R.China Cereal Institute Henan Academy of Agricultural SciencesZhengzhou 450002P.R.China College of Agronomy Henan Agricultural UniversityZhengzhou 450002P.R.China luoyang Academy of Agriculture and Forestry Sciences Luoyang 471023P.R.China

Increasing zinc(Zn)concentration in wheat grain is important to minimize human dietary Zn *** study aimed to investigate the effect of foliar Zn and soil nitrogen(N)applications on the accumulation and distribution of N and Zn in grain pearling fractions,N remobilization,and the relationships between nutrient concentration in the vegetative tissues and grain or its fractions in two cropping years in the North China *** results showed a progressive decrease in N and Zn concentrations from the outer to the inner parts of grain,with most of the accumulation in the core *** Zn application significantly increased N concentration in the pericarp,and soil N application increased N concentration in each grain *** treatments significantly increased core endosperm Zn *** Zn had no effect on grain N and Zn *** N application made N concentrated in the aleurone,promoted Zn translocation to the core endosperm and also increased N remobilization and its efficiency from the shoot to the grain,but no improved contribution to grain was found.N concentration in grain and its fractions were positively correlated with N in vegetative organs at anthesis and maturity,while positive correlations were obtained between N concentration in the pericarp and progressive central area of the endosperm and Zn concentration in the core ***,foliar Zn and soil N applications effectively increased yield and N and Zn concentrations in the wheat grain,particularly in the endosperm,and could be promising strategies to address Zn deficiency.

关键词： foliar Zn application soil N application winter wheat nutrient distribution N remobilization

Simulation of nanofluid natural convection based on single-particle hydrodynamics in energy-conserving dissipative particle dynamics(eDPD)

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Applied Mathematics and Mechanics(English Edition) 2024年第8期45卷 1429-1446页

作者： Wei lu Shuo chen Zhiyuan yu Jiayi ZHAO School of Aerospace Engineering and Applied Mechanics Tongji UniversityShanghai 200092China Shanghai Key Laboratory of Vehicle Aerodynamics and Vehicle Thermal Management Systems Tongji UniversityShanghai 201804China School of Energy and Power Engineering University of Shanghai for Science and TechnologyShanghai 200093China

In the present study,the nanofliud natural convection is investigated by the energy-conserving dissipative particle dynamics(eDPD)method,where the nanoparticles are considered at the single-particle *** thermal expansion coefficientβand the viscosityμof the simulated system containing nanoparticles are calculated and found to be in close alignment with the previous simulation *** single-particle hydrodynamics in e DPD enables simulations of nanofluid natural convection with higher Rayleigh numbers and greater nanoparticle volume ***,this approach is utilized to simulate the nanoparticle distribution during the enhanced heat transfer process in the nanofluid natural *** localized aggregation of nanoparticles enhances the heat transfer performance of the nanofluid under specific Rayleigh numbers and nanoparticles volume fractions.

关键词： single-particle hydrodynamics energy-conserving dissipative particle dynamics(eDPD) nanoparticle nanofluid heat transfer

Advancement in porphyrin/phthalocyanine compounds-based perovskite solar cells

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ATRP-Template Dispersion Polymerization of Methacrylic Acid/PVP

结构化学 2024年第3期43卷 55-66页

作者： chen lu Zefeng yu Jing Cao State Key Laboratory of Applied Organic Chemistry Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu ProvinceCollege of Chemistry and Chemical EngineeringLanzhou UniversityLanzhou730000PR China

Porphyrin and phthalocyanine compounds belong to a class of large and aromatic macrocyclic *** to their unique structures and electronic properties,they have found widespread applications in optoelectronic *** recent years,the doping of porphyrins and phthalocyanines into perovskite solar cells(PSCs)has emerged as an effective strategy to enhance device performance and *** doping strategy enables the modulation of perovskite film crystallization and surface defects,thereby improving charge transfer and enhancing the photo-conversion *** sensitizers,porphyrins and phthalocyanines absorb light in the visible and near-infrared spectral ranges,providing an advantage to the light absorption characteristics of ***,their roles in interface modification and defect repair contribute to the long-term stability of the *** central metal of porphyrin can also adsorb ions and prevent the migration of harmful *** review summarizes the recent progress in the research on porphyrin and phthalocyanine-doped PSCs,empha-sizing their potential value in enhancing optoelectronic performance,increasing stability and expanding the application scope of these devices.

关键词： Porphyrin Phthalocyanine Charge transport Interfacial chemistry Perovskite solar cells

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Chinese Journal of Polymer Science 2014年第4期32卷 476-487页

作者： cheng-cheng Yang Dan Meng Kan Zhan yu-lu chen Hui Zhang Min Wu 倪恨美 School of Chemistry and Chemical Engineering Southeast University

ATRP-template dispersion polymerization of methacrylic acid （MAA） on the template of polyvinyl pyrrolidone （PVP K-30） was carried out in the aqueous solution by using methyl 2-bromopropionate （MBP）/CuC1/2,2＇-bipyridine （bpy） as the initiation system. The scanning electron microscopy （SEM）, dynamic light scattering （DLS） and gel permeation chromatography （GPC） were employed for evaluating the results of polymerization. As a result, the minimonomer droplets formed due to the H-bond interaction of PVP-MAA. The stability of droplets was dependent on pH and the concentrations of both PVP and MAA. When pH 〈 2, the coagulum of PVP-MAA formed, whereas when pH 〉 4.5, the droplets were not observable by DLS. In order to prepare the stable latex, the concentration of PVP should be lower than 9 wt%, whilst the concentration of MAA should be lower than 5.5 wt%. The optimum condition was pH 2.4, PVP 4.76 wt% and MAA 5 wt%, by which the stable latex of ca. 50 nm nanoparticles of PMAA/PVP was prepared by ATRP polymerization and simultaneously the molar mass of PVP was duplicated by PMAA according to GPC diagrams. In contrast, by using AIBN, KPS and KPS-Na2SO3 redox initiation system, the coagulum accompanying with the larger molar mass of PMAA was obtained, irrespective of pH and concentrations of PVP and MAA.

关键词： Nanoparticle ATRP Dispersion polymerization Template polymerization Hydrogel.