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A FINITE ELEMENT METHOD WITH RECTANGULAR PERFECTLY MATCHED LAYERS FOR THE SCATTERING FROM CAVITIES

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Journal of Computational Mathematics 2009年第6期27卷 812-834页

作者： Deyue zhang fuming Ma Heping Dong School of Mathematics Jilin University Changchun 130012 China

We develop a finite element method with rectangular perfectly matched layers （PMLs） for the wave scattering from two-dimensional cavities. The unbounded computational domain is truncated to a bounded one by using of a rectangular perfectly matched layer at the open aperture. The PML parameters such as the thickness of the layer and the fictitious medium property are determined through sharp a posteriori error estimates. Numerical experiments are carried out to illustrate the competitive behavior of the proposed method.

关键词： Cavity Perfectly matched layers Finite element method.

Nitrogen-doped lignin based carbon microspheres as anode material for high performance sodium ion batteries

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Green Energy & Environment 2021年第2期6卷 220-228页

作者： Linlin Fan Zhiqiang Shi Qingjuan Ren Lei Yan fuming zhang Liping Fan Tianjin Key Laboratory of Advanced Fibers and Energy Storuage Schoo of Materials Science and EngineeringTiangong UniversityTianjin300387China Schod of Chemical Engineering and Technology Tianjin University Tianjin300072China

Nitrogen-doped lignin-based carbon microspheres are synthesized using 3-aminophenol as a nitrogen source by the hydrothermal *** structural change and the effect on the electrochemical properties are systematically investigated. Nitrogen-doped lignin-based carbon microspheres represent well-developed spherical morphology with many active sites, ultramicroporous(< 0.7 nm) structure, and large interlayer spacing. Consistent with the obtained physical structures and properties, the nitrogen-doped carbon microspheres exhibit fast sodium ion adsorption/intercalation kinetic process and excellent electrochemical performance. For example, a reversible specific capacity of 374 m Ah g^(-1) at 25 m A g^(-1) with high initial coulombic efficiency of 85% and high capacitance retention of 90% after 300 cycles at 100 m A g^(-1) and stable charge/discharge behavior at different current density is obtained. The additional defects and abundant ultramicroporous structure can enhance sloping capacity, and large interlayer spacing is considered to be the reason for improving plateau capacity.

关键词： Sodium ion batteries Anode Carbon microspheres Hydrothermal method Lignin

ANALYSIS OF TWO-DIMENSIONAL ELECTROMAGNETIC SCATTERING BY A PERFECTLY CONDUCTING OBSTACLE IN A HOMOGENEOUS CHIRAL ENVIRONMENT

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Applied Mathematics(A Journal of Chinese Universities) 2007年第3期22卷 259-266页

作者： Gao Tianling Ma fuming zhang Deyue College of Mathematics Jilin University Changchun 130012 China

The time-harmonic electromagnetic plane waves incident on a perfectly conducting obstacle in a homogeneous chiral environment are considered. A two-dimensional direct scattering model is established and the existence and uniqueness of solutions to the problem are discussed by an integral equation approach. The inverse scattering problem to find the shape of scatterer with the given far-field data is formulated. Result on the uniqueness of the inverse problem is proved.

关键词： chiral media Maxwell's equation far-field pattern direct problem inverse problem.

Characterization of squash polysaccharide and the anti-diabetic effect on type 2 diabetic rat revealed by urine metabolomics analysis

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Food Science and Human Wellness 2024年第5期13卷 2937-2946页

作者： Li Liang fuming zhang Quanhong Li Baoguo Sun Yuyu zhang Robert J.Linhardt Beijing Advanced Innovation Center for Food Nutrition and Human Health Beijing Key Laboratory of Flavor ChemistryBeijing Technology and Business University(BTBU)Beijing 100048China Departments of Chemical and Biological Engineering Chemistry and Chemical BiologyBiomedical Engineering and Biological ScienceCenter for Biotechnology and Interdisciplinary StudiesRensselaer Polytechnic InstituteTroy 12180USA College of Food Science and Nutritional Engineering China Agricultural UniversityBeijing 100083China China National Engineering Research Center for Fruit and Vegetable Processing Beijing 100083China

The present study reports the structural characteristics of 3 polysaccharide fractions(SPS-F1,SPS-F2 and SPS-F3)isolated and purified from ***-F1(molecular weight(Mw)=12.30 kDa)and SPS-F2(Mw=19.40 kDa)were likely to contain HG and RG-I domain of pectic polysaccharide,***-F2(Mw=270.4 kDa)was mainly composed of rhamnose,galactose and *** treatment with SPS decreased body weight gain,glucose and TG levels in type 2 diabetes ***,25 differential metabolites were identified based on urinary metabolomics analysis,which are crucial to the anti-diabetic effect of *** regulation of nicotinamide N-oxide,histamine,cis-aconitate,citrate,L-malic acid,3-(3-hydroxyphenyl)propanoic acid and N-acetyl-L-aspartic acid were mainly associated with energy metabolism,gut microbiota and *** of surface plasmon resonance revealed the binding kinetics with galectin-3(Gal-3)and fibroblast growth factor 2(FGF2).The K_(D)values of SPS-F2 and SPS-F3 to Gal-3 were 4.97×10^(-3)and 1.48×10^(-3)mol/L,indicating a weak binding *** 3 fractions showed moderate binding to FGF2 and the affinity was SPS-F3>SPS-F2>***,the metabolomics and SPR approach were proved to be a promising tool in exploring the anti-diabetes effects of SPS and provided a deep understanding of the mechanisms.

关键词： Polysaccharide Metabolomics Type 2 diabetes Surface plasmon resonance

Bioactive compounds in Hericium erinaceus and their biological properties:a review

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Food Science and Human Wellness 2024年第4期13卷 1825-1844页

作者： Yue Qiu Genglan Lin Weiming Liu fuming zhang Robert J.Linhardt Xingli Wang Anqiang zhang College of Food Science and Engineering Zhejiang University of TechnologyHangzhou 310014China Zhejiang Biosan Biotech Co. Ltd.Hangzhou 310052China Department of Chemical and Biological Engineering Center for Biotechnology and Interdisciplinary StudiesRensselaer Polytechnic InstituteTroyNY 12180USA Departments of Chemistry and Chemical Biology and Biomedical Engineering Biological ScienceCenter for Biotechnology and Interdisciplinary StudiesRensselaer Polytechnic InstituteTroyNY 12180USA

Hericium erinaceus is a nutritious edible and medicinal fungi,rich in a variety of functional active ingredients,with various physiological functions such as antioxidation,anticancer,and enhancing *** is also effective in protecting the digestive system and preventing neurodegenerative *** this review paper,we summarize the sources,structures and efficacies of the main active components in *** fruiting body,mycelium,and culture media,and update the latest research progress on their biological activities and the related molecular *** on this information,we provide detailed challenges in current research,industrialization and information on the active ingredients of *** for future studies and new applications of *** are proposed.

关键词： Hericium erinaceus Bioactive compounds Biological activities Antioxidation Neuroprotection Immunoregulation

Bioengineered production of glycosaminoglycans and their analogues

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Systems Microbiology and Biomanufacturing 2021年第2期1卷 123-130页

作者： Weihua Jin fuming zhang Robert J.Linhardt College of Biotechnology and Bioengineering Zhejiang University of TechnologyHangzhou 310014China Department of Chemical and Biological Engineering Center for Biotechnology and Interdisciplinary StudiesRensselaer Polytechnic InstituteTroyNY 12180USA Department of Biological Science Departments of Chemistry and Chemical Biology and Biomedical EngineeringCenter for Biotechnology and Interdisciplinary StudiesRensselaer Polytechnic InstituteTroyNY 12180USA

Glycosaminoglycans(GAGs)are a class of linear polysaccharides,consisting of alternating disaccharide sequences of uronic acid and hexosamines(or galactose)with and without *** can interact with various proteins,such as growth factors,receptors and cell adhesion molecules,endowing these with various biological and pharmacological *** activities make GAGs useful in health care products and ***,all GAGs,with the exception of hyaluronan,are produced by extraction from animal ***,limited availability,poor control of animal tissues,impurities,viruses,prions,endotoxins,contamination and other problems have increased the interest in new approaches for GAG *** new approaches include GAGs production by chemical synthesis,chemoenzymatic synthesis and metabolic *** chemically synthesized heparin pentasaccharide,fondaparinux sodium,is in clinical ***,hyaluronan today is prepared by microbial fermentation,largely replacing hyaluronan from rooster *** recent gram scale chemoenzymatic synthesis of a heparin dodecasaccharide suggests its potential to replace currently used animal-sourced low molecular weight heparin(LMWH).Despite these considerable successes,such high-tech approaches still cannot meet worldwide demands for *** review gives a brief introduction on the manufacturing of unfractionated and low molecular weight heparins,the chemical synthesis and chemoenzymatic synthesis of GAGs and focuses on the progress in the bioengineered preparation of GAGs,particularly heparin.

关键词： Glycosaminoglycans Metabolic engineering Chemoenzymatic synthesis Heparin

Study of real-time LWD data visual interpretation and geo-steering technology

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Petroleum Science 2013年第4期10卷 477-485页

作者： Shao Cairui zhang fuming Chen Guoxing Ji Jiaqi Hou Qinggong Tang Jianhong Cao Xianjun School of Geosciences China University of Petroleum CNPC West Drilling and Logging Company SINOPEC Shengli Well logging Company

LWD（logging while drilling） data has been used to explore complex subtle reservoirs by realtime visual interpretation and *** method comprises of computer communication,well log data processing,formation recognition,reservoir modeling and model updating in real *** studied the key technologies related to real-time LWD data visual interpretation and geo-steering and developed computer software with Chinese intellectual property rights covering the following important aspects： 1） real-time computer communication of well site LWD data;2） visualization of geological model and borehole information;3） real-time interpretation of LWD data;4） real-time geological model updating and geo-steering *** use field application examples to demonstrate the feasibility and validity of the proposed technologies.

关键词： LWD(logging while drilling) real-time visualization interpretation geo-steering

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八渡车站碎石土地层中长锚索施工技术

岩石力学与工程学报 2007年第A01期26卷 3155-3160页

作者：赵红玲张勇张福明西安建筑科技大学陕西西安710055 总参工程兵科研三所河南洛阳471023

随着我国经济建设的飞速发展,各类岩土加固工程中锚固技术的应用日益广泛。大量工程实践已经证明锚固技术的经济性和先进性。但是,锚固工程常遇到各类不良地层(例如塌积、残积、坡积和崩积层等碎石土地层),在锚固施工的钻孔中由于严重... 详细信息

随着我国经济建设的飞速发展,各类岩土加固工程中锚固技术的应用日益广泛。大量工程实践已经证明锚固技术的经济性和先进性。但是,锚固工程常遇到各类不良地层(例如塌积、残积、坡积和崩积层等碎石土地层),在锚固施工的钻孔中由于严重的塌孔、卡钻,给施工带来很大困难,同时也给锚固工程质量带来隐患。通过工程实践和大量试验,研究组合式钻具钻孔方法,较好地解决在上述地层中的成孔问题,提高施工速度。结合南宁—昆明铁路八渡车站的锚索施工,介绍复杂地层中锚固工程施工的技术措施和应注意的有关技术问题。

关键词：土力学碎石土锚固钻孔边坡加固

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面向未来的低碳绿色高炉炼铁技术发展方向

炼铁 2016年第1期35卷 1-6页

作者：张福明北京首钢国际工程技术有限公司

通过对高炉炼铁的功能解析,以及流程集成与结构优化,论述了面向未来的低碳绿色高炉炼铁技术发展方向,指出高炉精料、炉料合理分布控制、高效长寿、高风温、富氧喷煤、煤气干法除尘等关键共性技术,仍是未来高炉低碳绿色发展的重要技术基... 详细信息

通过对高炉炼铁的功能解析,以及流程集成与结构优化,论述了面向未来的低碳绿色高炉炼铁技术发展方向,指出高炉精料、炉料合理分布控制、高效长寿、高风温、富氧喷煤、煤气干法除尘等关键共性技术,仍是未来高炉低碳绿色发展的重要技术基础、技术支撑和技术保障。认为现代高炉炼铁要构建动态精准、高效运行的生产体系,以高效率、低成本、低排放为目标,提高生产效率、降低能源消耗、减少环境污染,实现高炉炼铁"高效、低耗、长寿、低碳、绿色"的协同发展目标,着力提高综合技术装备水平,大力发展循环经济,实现低碳绿色制造。

关键词：高炉炼铁低碳冶金