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Integrated lifting line/surface panel method for optimal propeller design with consideration of hub effect

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Journal of Hydrodynamics 2019年第6期31卷 1218-1230页

作者： wen-yu sun Guo-fu Huang China Ship Scientific Research Center Wuxi 214082China

An optimal marine propeller design method is proposed,which integrates the lifting line and surface panel method and is characterized by the use of the surface panel method to take the hub effect into *** developing an integrated approach instead of an iterative method for the calculation of the interaction between the hub and the designed blades,the hub effects on the optimal circulation can be accounted for throughout the theoretical design *** new integrated method provides a fast and accurate enough method to model the straight forward hub surface,in the optimal propeller design.A systematic design procedure from the basic design inputs to the blade geometry determination is performed and the designed propellers are validated by the surface panel method and the RANS *** design and analysis cases are considered by different approaches with comparison and *** a comparative study including different hub geometries is also performed to reveal the mechanism of the hub effect on the distributions of the propeller optimal loads.

关键词： Optimal circulation design lifting line method surface panel method hub effect

A NONMONOTONE SECOND-ORDER STEPLENGTH METHOD FOR UNCONSTRAINED MINIMIZATION

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Journal of Computational Mathematics 2007年第1期25卷 104-112页

作者： Qun-yan Zhou wen-yu sun Department of Basic Science Jiangsu Teachers University of Technology Changzhou 213001 China School of Mathematics and Computer Science Nanjing Normal University Nanjin9 210097 China School of Mathematics and Computer Science Nanjing Normal University Nanjing 210097 China

In this paper, a nonmonotone method based on McCormick＇s second-order Armijo＇s step-size rule [7] for unconstrained optimization problems is proposed. Every limit point of the sequence generated by using this procedure is proved to be a stationary point with the second-order optimality conditions. Numerical tests on a set of standard test problems are presented and show that the new algorithm is efficient and robust.

关键词： Nonmonotone method Armijo's line search Direction of negative curvature,Unconstrained optimization.

TWO ALGORITHMS FOR LC^1 UNCONSTRAINED OPTIMIZATION

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Journal of Computational Mathematics 2000年第6期18卷 621-632页

作者： wen-yu sun R.J.B.de Sampaio Jin-yun yuan School of Mathematics and Computer Science Nanjing Normal UniversityNanjing 210097China Applied Informatics Program Pontifical Catholic University of ParanaCuritibaPR81611-970Brazil Department of Mathematics Federal University of ParanaCuritibaPR81531-990Brazil

Presents two algorithms for LC unconstrained optimization problems which use the second order Dini upper directional derivative. Simplicity of the methods to use and perform; Discussion of related properties of the it... 详细信息

关键词： nonsmooth optimization directional derivative Newton-like method convergence trust region method

Simulation of Soil Organic Carbon Dynamics in Chinese Rice Paddies from 1980 to 2000

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Pedosphere 2007年第1期17卷 1-10页

作者： ZHANG wen yu Yong-Qiang sun wen-Juan HUANG Yao State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry Institute of Atmospheric Physics Chinese Academy of Sciences Beijing 100059 China

Changes in soil organic carbon （SOC） of rice paddies in China were simulated from 1980 to 2000 by linking a coupled bio-physical model to GIS database. The coupled model consists of two sub-models including Crop-C for simulating net primary productivity and hence residue retention and Soil-C for computing the turnover rates of SOC. The GIS database included parameters of climate, soils and agricultural activities with the resolution of 10 km × 10 km. Model simulation indicated that Chinese rice paddies covering 22.6 Mha sequestrated a considerable amount of C, about 0.15 ± 0.07 Pg C from 1980 to 2000. Annual sequestration rate increased sharply from -180 ± 45 kg C ha^-1 year^-1 in 1980 to 440 ± 170 kg C ha^-1 year^-1 in 1989. Thereafter, a steaziy sequestration rate of 460 ± 170 kg C ha^-1 year^-1 occurred till 1994 and declined since then. Approximately 84% of the Chinese rice paddies sequestrated carbon, while 15% lost carbon and 1% kept balance over the 20 years. Great SOC sequestration occurred in eastern, southern and central China, while a slight decline of SOC existed in some regions of northeastern and southwestern China.

关键词： Chinese rice paddy GIS model estimates SOC

An unconstrained optimization method using nonmonotone second order Goldstein's line search

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Science China Mathematics 2007年第10期50卷 1389-1400页

作者： wen-yu sun~(1+) Qun-yan ZHOU~(1,2) ~1 School of Mathematics and Computer Science,Nanjing Normal University,Nanjing 210097,China ~2 Department of Basic Courses,Jiangsu Teachers University of Technology,Changzhou 213001,China 1. School of Mathematics and Computer Science Nanjing Normal University Nanjing 210097 China 2. Department of Basic Courses Jiangsu Teachers University of Technology Changzhou 213001 China

In this paper, an unconstrained optimization method using the nonmonotone second order Goldstein's line search is proposed. By using the negative curvature information from the Hessian,the sequence generated is shown to converge to a stationary point with the second order optimality conditions. Numerical tests on a set of standard test problems confirm the efficiency of our new method.

关键词： nonmonotone method, direction of negative curvature, line search, descent pair,unconstrained optimization

A NOVEL STEROID FROM EICHHORNIA CRASSIPES

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Chinese Chemical Letters 1991年第7期2卷 509-512页

作者： Hou Ming WU Hui Qiang ZHOU Sheng yu HUANG Kan MA Xia Fei LAO State Key Laboratory of Bio-organic and Natural Products Chemistry Shanghai Institute of Organic Chemistry,Academia Sinica 345 LingLing Lu,Shanghai 200032Shu wen yu wen Hao sun Zi wen yu Shanghai Institute of Plant Physiology Academia Sinica,Shanghai 200032

6 -Hydroxy-stigmasta-4,22-diene-3-one 1,a novel steroid, was isolated from the Eichhornia *** structure was deter- mined by ~1H and ^(13)C NMR spectroscopy and further confirmed by authen- tic sample,which was synthes... 详细信息

关键词： A NOVEL STEROID FROM EICHHORNIA CRASSIPES

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纳米复合氧化物催化发光法测定空气中的甲醛

化学学报 2008年第8期66卷 943-946页

作者：周考文周宇孙月田雪娇北京联合大学生物化学工程学院北京100023

基于纳米复合氧化物上甲醛被催化氧化产生化学发光的现象,建立了直接测定空气中微量甲醛的方法.实验发现,甲醛在许多纳米级金属氧化物表面都有发光现象,但在纳米级钼钒钛(原子比为2∶3∶5)复合氧化物表面上有较高的发光强度和较好的选择... 详细信息

基于纳米复合氧化物上甲醛被催化氧化产生化学发光的现象,建立了直接测定空气中微量甲醛的方法.实验发现,甲醛在许多纳米级金属氧化物表面都有发光现象,但在纳米级钼钒钛(原子比为2∶3∶5)复合氧化物表面上有较高的发光强度和较好的选择性.最佳实验条件为:分析波长535nm,测定温度265℃,载气流速150mL/min.方法的检测限(3σ)为0.04mg/m3,线性范围为0.07～34mg/m3,相关系数为0.9994,回收率为98.2%～101.4%.对常见共存物的研究发现,除丙酮外,苯、氨、二氧化硫和乙醇不干扰测定.

关键词：甲醛催化发光纳米复合氧化物

Role of macrophage polarization in diabetic foot ulcer healing:A bibliometric study

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World Journal of Diabetes 2025年第1期16卷 169-186页

作者： You-wen Zhang Lei sun Yan-Nan Wang Shi-yu Zhan Department of Peripheral Vascular Disease Affiliated Hospital of Shandong University of Traditional Chinese MedicineJinan 250014Shandong ProvinceChina Department of Surgery The Second Affiliated Hospital of Shandong University of Traditional Chinese MedicineJinan 250001Shandong ProvinceChina Department of Surgery Longkou Traditional Chinese Medicine HospitalYantai 265701Shandong ProvinceChina

BACKGROUND Diabetic foot ulcers(DFUs)are a significant contributor to disability and mortality in diabetic *** polarization and functional regulation are promising areas of research and show therapeutic potential in the field of DFU ***,the complex mechanism,the difficulty in clinical translation,and the large heterogeneity present significant ***,this study was to comprehensively analyze the publication status and trends of studies on macrophage polarization and DFU *** To examine the relevant literature on macrophage polarization in DFU *** A bibliometric analysis was conducted using the Web of Science *** literature was retrieved from the Web of Science Core Collection database between 2013 to 2023 using literature visualization and analysis software(VOSviewer and CiteSpace)and bibliometric online *** obtained literature was then subjected to visualization and analysis of different countries/regions,institutions,journals,authors,and keywords to reveal the research’s major trends and *** The number of publications on the role of macrophage polarization in DFU healing increased rapidly from 2013 to 2023,especially in the latter *** researchers were the most prolific in this field,with 217 publications,while American researchers had been engaged in this field for a longer *** Tan of Nanjing Drum Tower Hospital and Qian Ding of Nanjing University were the first to publish in this *** Jiao Tong University was the institution with the most publications(27).The keywords“bone marrow”,“adjustment,replacement,response,tissue repair”,and“activation,repair,differentiation”appeared more *** study of macrophage polarization in DFU healing focused on the regulatory mechanism,gene expression,and other *** This study through the bibliometric method reveals the research trends and development trends in this field of macrophage polar

关键词： Diabetic foot Wound healing Macrophage polarization Bibliometric analysis Research cooperation Research trend

Curcumin in gastric cancer treatment:A commentary on mechanistic insights and future directions

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World Journal of Gastrointestinal Oncology 2025年第1期17卷 265-267页

作者： Xin-yue Wei wen-Bo Cao Sai-Jun Mo Zhi-Yan sun Department of Pathophysiology School of Basic Medical SciencesZhengzhou UniversityZhengzhou 450001Henan ProvinceChina School of Basic Medical Science Zhengzhou UniversityZhengzhou 450001Henan ProvinceChina Department of Basic Science of Oncology School of Basic Medical SciencesZhengzhou UniversityZhengzhou 450001Henan ProvinceChina Department of Special Service No.988 Hospital of the Joint Service Support Force of PLAZhengzhou 450042Henan ProvinceChina

The study by Yang et al presents a comprehensive investigation into the thera-peutic potential of curcumin for gastric cancer(GC).Using network pharma-cology,the researchers identified 48 curcumin-related genes,31 of which overlap with GC *** genes,including ESR1,EGFR,CYP3A4,MAPK14,CYP1A2,and CYP2B6,are linked to poor survival in GC *** docking con-firmed strong binding affinity of curcumin to these *** vitro experiments demonstrated that curcumin effectively inhibits the growth and proliferation of BGC-823,suggesting its therapeutic potential in GC through multiple targets and pathways.

关键词： Curcumin Gastric cancer Network pharmacology Mechanism of action In vitro experiments