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Syntheses of Fe-Ni Magnetic Nanoparticles and Their Applications on Biologic Labeling

过程工程学报 2006年第Z2期6卷 249-252页

作者：戴明凤萧仲凯李小刚陈新泰 Department of Science Taipei Municipal University of Education Department of Medical Imaging Taiwan University Hospital and College of Medicine Department of Electronic Engineering Minghsing University of Science and Technology Musculoskeletal Disease Center J.L.Pettis VA Medical Center Department of Biochemistry Loma Linda University

In this study,we compared FeNi alloy magnetic nanoparticles(MNPs) prepared by either combustion or chemical precipitation *** found that the FeNi MNPs generated by combustion method have a rather high saturation magnetization Ms of ～180 emu/g and a coercivity field Hc of near ***,the alloy nanoparticles are easily aggregated and are not well dispersive such that size distribution of the nanoparticle clusters is wide and clusters are rather big(around 50～700 nm).To prepare a better quality and well dispersed Fe-Ni MNPs,we also developed a thermal reflux chemical precipitation method to synthesize FeNi3 alloy *** precursor chemicals of Fe(acac)3 and Ni(acac)2 in a molecular ratio of 1:3 reacted in octyl ether solvent at the boiling point of solvent(～300 ℃) by the thermal reflux *** 1,2-hexadecandiol and tri-n-octylphosphine oxide(TOPO) were used as reducer and surfactant,*** chemically precipitated FeNi3 MNPs are well dispersed and have well-controlled particle sizes around 10～20 nm with a very narrow size distribution(±1.2 nm).The highly monodispersive FeNi3 MNPs present good uniformity in particle shape and crystallinity on particle *** MNPs exhibit well soft magnetism with saturation magnetization of ～61 emu/g and Hc～*** biomedically compatible FeNi MNPs which were coated with biocompatible polyethyleneimine(PEI) polymer were also *** demonstrated that the PEI coated FeNi MNPs can enter the mammalian cells in vitro and can be used as a magnetic resonance imagine(MRI) contrast *** results demonstrated that FeNi MNPs potentially could be applied in the biomedical *** functionalized magnetic beads with biocompatible polymer coated on MNPs are also completed for biomedical applications.

关键词： magnetic nanoparticles Fe-Ni alloy chemical precipitation method biologic labeling

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Growth of Cobalt doped Zinc Oxide on Glass substrate with Chemical Vapor Deposition

Growth of Cobalt doped Zinc Oxide on Glass substrate with Ch...

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中国颗粒学会超微颗粒专委会2013年年会暨第八届海峡两岸超微颗粒学术研讨会

作者： ming-fong tai Bo-Shuang Cheng Chih-ming Lin Department of Physics National Tsing-Hua University Department of Applied Science National Hsinchu University of Education

Zinc oxide has special optical properties,such as high UV emission and field emission. With various doping of transition metal(Cobalt),Co-ZnO shows enhancement of electrical and magnetic *** works mainly investigated that ZnO nanorods were grown on silicon *** this study,we use chemical vapor deposition to growed Co

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Syntheses of Fe-Ni Magnetic Nanoparticles and Their Applications on Biologic Labeling

Syntheses of Fe-Ni Magnetic Nanoparticles and Their Applicat...

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中国颗粒学会2006年年会暨海峡两岸颗粒技术研讨会

作者： ming-fong tai Jong-Kai Hsiao Yi-fong Chou Kuo-Chih Wang Bor-Zin La Shin-tai Chen Department of Optoelectronic System Engineering minghsin University of Science and Technology HsinchuChina Department of Medical Imaging taiwan University Hospital and College of Medicine TaipeiChina Department of Electronic Engineering WeFeng Institute of Technology ChiayiChina Department of Electric Engineering WeFeng Institute of Technology ChiayiChina Musculoskeletal Disease Center J.L.Pettis VA Medical Center Loma Linda CA 92357USA Department of Biochemistry Loma Linda University Loma Linda CA 92357 USA

In this study, we compared FeNi alloy magnetic nanoparticles (MNPs) prepared by either combustion or chemical precipitation methods. We found that the FeNi MNPs generated by combustion method have a rather high saturation magnetization Ms of -180 emu/g and a coercivity field Hc of near zero. However, the alloy nanoparticles are easily aggregated and are not well dispersive such that size distribution of the nanoparticle clusters are wide and clusters are rather big (around 5000 nm). To prepare a better quality and well dispersed Fe-Ni MNPs, we also developed a thermal reflux chemical precipitation method to synthesize FeNi3 alloy MNPs. The precursor chemicals of Fe(acac)3 and Ni(acac)2 in a molecular ratio of 1:3 reacted in octyl ether solvent at the boiling point of solvent (00 ℃) by the thermal reflux process. The 1,2-hexadecandiol and tri-n-octylphosphine oxide (TOPO) were used as reducer and surfactant, respectively. The chemically precipitated FeNi3 MNPs are well dispersed and have well-controlled particle sizes around 10-20 nm with a very narrow size distribution (±1.2 nm). The highly monodispersive FeNi3 NPs present good uniformity in particle shape and crystallinity on particle surfaces. The MNPs exhibit well soft magnetism with saturation magnetization of -61 emu/g and Hc. The biomedical compatible FeNi MNPs which were coated with biocompatible polyethyleneimine (PEI) polymer were also synthesized. We demonstrated that the PEI coated FeNi MNPs can enter the mammalian cells in vitro and can be used as a magnetic resonance imagine (MRI) contrast agent. The results demonstrated that FeNi MNPs potentially could be applied in the biomedical field. The functionalized magnetic beads with biocompatible polymer coated on MNPs are also completed for biomedical applications.

关键词： magnetic nanoparticles Fe-Ni alloy chemical precipitation method biologic labeling

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Synthesis of Magnetic Nanoparticles for Application of Retroviral Vectors Mediated Gene Therapy

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过程工程学报 2004年第Z1期4卷 122-122页

作者： Huan-Chiu Ku ming-fong tai K.-H. William Lau David Baylink Shin-tai Chen Department of Physics Ting-Hua University Hsin-Chu China Department of Physics WeFeng Institute of Technology Chia-yi China Musculoskeletal Diseases Center J. L. Pettis VA Medical Center Loma Linda CA 92357 USA

　　Successful gene therapy depends on accurate delivery of therapeutic genes to target sites. In this report, we used magnetic nanopartieles to achieve this goal by developing magnetic Moloney leukemia virus-based (MRV) vectors. The vectors are combined by magnetic nanoparticles with the MRV viral vectors and can be guided to a specific site by an external magnetic filed.……

关键词： Gene Therapy Retroviral Vectors magnetic nanoparticles gene therapy

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Numerical Approach to Film Cooling Effectiveness Over a Plate Surface with Coolant Impingement

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Journal of Thermal Science 2004年第1期13卷 67-74页

作者： Chang-Hsien tai Jr-ming Miao A-Fu Kao Department of Vehicles Engineering National Pingtung University of Science and TechnologyPingtungTaiwanChinaDepartment of Mechanical EngineeringChung Cheng Institute of TechnologyNational Defense UniversityTaoyuanTaiwanChinaGraduate School of Defense Science StudiesChung Cheng Institute of TechnologyNational Defense UniversityTaoyuanTaiwanChina

The aim of the present study is conducting the numerical approach to a combination of internal jet impingement and external film cooling over a flat plate. A multi-block three-dimensional Navier-Stokes code, CFX 4.4, with k-e turbulence model is used to simulate this complicated thermal-flow structure induced by the interaction of coolant jet and hot cross mainstream. By assuming the adiabatic wall boundary condition on the tested film-cooled plate, both the local and the spanwise-averaged adiabatic film cooling effectiveness are evaluated for comparison of the cooling performance at blowing ratios of Br=0.5, 1.0, and 1.5. Film flow data were obtained from a row of five cylindrical film cooling holes, inclined in angle of 35?and 0?in direction of streamwise and spanwise, respectively. The film cooling hole spacing between adjacent holes is 15 mm for all the holes. Before the coolant flow being injected through individual cooling hole then encountered with the mainstream, an impingement chamber containing an impingement plate with 43 holes is located on the path of coolant flow. Present study also focused on the effect of impingement spacing, 10mm, 20mm, and 30mm. Compare the results, we find the impingement jet has a significant effect on the adiabatic film cooling effectiveness. As the coolant impingement spacing is fixed, results indicated that higher blowing ratio would enhance the local and the spanwise-averaged adiabatic film cooling effectiveness. Moreover, neither uniform nor parabolic distribution of pressure distribution are observed within the coolant hole-pipe.

关键词： film cooling impingement cooling CFD turbulence model.

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Optimizing SUS 304 wire drawing process by grey relational analysis utilizing Taguchi method

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Journal of University of Science and Technology Beijing 2008年第6期15卷 714-722页

作者： Al-Refaie Abbas ming-Hsien Li Kuo-Cheng tai Department of Industrial Engineering University of Jordan Amman Jordan Department of Industrial Engineering and Systems Management Feng Chia University Taichung China Taipei Department of Mechanical and Computer-Aided Engineering Feng Chia University Taichung China Taipei

In the stainless steel 304 （SUS 304） wire drawing process, optimizing the die life and wire tensile strength, which are the larger-the-better quality characteristics （QCH） types, is of main interest. Three control factors, involving reduction ratio, lubricant temperature, and drawing speed, were investigated utilizing L9（34） orthogonal array （OA）. The grey relational analysis was conducted for the normalized signal-to-noise （S/N） ratios. The ordinal value of the grey grade was then used to decide optimal factor levels. The anticipated improvements in die life and wire tensile strength were estimated 25.31 h and 22.50 kg/mm2, respectively. To decide the significant factor which had effect on each QCH and predict the average value of each QCH, analysis of variance （ANOVA） was performed for S/N ratio and QCH. Confirmation experiments were then conducted, where a good overlap was noticed between the predicted and confirnation intervals for each QCH. The Hotelling T2 and the sample generalized variance control charts were finally utilized in controlling and monitoring future production. In conclusion, the grey relational analysis utilizing Taguchi method is an effective approach for optimizing the die life and wire tensile strength for SUS wire drawing process. 2008 University of Science and Technology Beijing. All rights reserved.

关键词： stainless steel grey relational analysis analysis of variance (ANOVA) optimization control charts

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High Utility Periodic Frequent Pattern Mining in Multiple Sequences

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Computer Modeling in Engineering & Sciences 2023年第10期137卷 733-759页

作者： Chien-ming Chen Zhenzhou Zhang Jimmy ming-tai Wu Kuruva Lakshmanna College of Computer Science and Engineering Shandong University of Science and TechnologyQingdao266590China Department of Information Technology Vellore Institute of TechnologyVellore632014India

Periodic patternmining has become a popular research subject in recent years;this approach involves the discoveryof frequently recurring patterns in a transaction sequence. However, previous algorithms for periodic patternmining have ignored the utility (profit, value) of patterns. Additionally, these algorithms only identify periodicpatterns in a single sequence. However, identifying patterns of high utility that are common to a set of sequencesis more valuable. In several fields, identifying high-utility periodic frequent patterns in multiple sequences isimportant. In this study, an efficient algorithm called MHUPFPS was proposed to identify such patterns. To addressexisting problems, three new measures are defined: the utility, high support, and high-utility period sequenceratios. Further, a new upper bound, upSeqRa, and two new pruning properties were proposed. MHUPFPS usesa newly defined HUPFPS-list structure to significantly accelerate the reduction of the search space and improvethe overall performance of the algorithm. Furthermore, the proposed algorithmis evaluated using several *** experimental results indicate that the algorithm is accurate and effective in filtering several non-high-utilityperiodic frequent patterns.

关键词： Decision making frequent periodic pattern multi-sequence database sequential rules utility mining

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S4Net: Single stage salient-instance segmentation

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Computational Visual Media 2020年第2期6卷 191-204页

作者： Ruochen Fan ming-ming Cheng Qibin Hou tai-Jiang Mu Jingdong Wang Shi-Min Hu BNRist Tsinghua UniversityBeijing100086China Nankai University Tianjin300071China MSRA Beijing100086China

In this paper, we consider salient instance segmentation. As well as producing bounding boxes,our network also outputs high-quality instance-level segments as initial selections to indicate the regions of interest. Taking into account the category-independent property of each target, we design a single stage salient instance segmentation framework, with a novel segmentation branch. Our new branch regards not only local context inside each detection window but also the surrounding context, enabling us to distinguish instances in the same scope even with partial *** network is end-to-end trainable and is fast(running at 40 fps for images with resolution 320 × 320). We evaluate our approach on a publicly available benchmark and show that it outperforms alternative solutions. We also provide a thorough analysis of our design choices to help readers better understand the function of each part of our network. Source code can be found at https://***/Ruochen Fan/S4 Net.

关键词： salient-instance segmentation salient object detection single stage region-of-interest masking

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Syntheses and Crystal Structure Characterizations of New Rare Earth Nickel Bismuth Compounds RNi_xBi_2 (R=Y,Gd Tb and Dy)

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Chinese Journal of Structural Chemistry 2005年第7期24卷 769-772,736页

作者： LUYu-ming LIANGYing YANGXin-Xin CHENHao-Hong ZHAOJing-tai StateKeyLaboratoryofHighPerformanceCeramicsandSuperfineMicrostructure ShanghaiInstituteofCeramicsTheChineseAcademyofSciencesShanghai200050China

The title new compounds with chemical formula RNixBi2 were synthesized by arc melting method followed by annealing. The crystal structures refined by using Rietveld method and X-ray powder diffraction data are isotypic to CaMnBi2 structure type, space group P4/nmm with a = 0.448350(4), c = 0.930026(2) nm, V = 0.186952(7) nm3 for YNi0.82Bi2, a = 0.448882(5), c = 0.93658(2) nm, V = 0.188715(8) nm3 for GdNi0.86Bi2, a = 0.448486(3), c = 0.93062(2) nm, V = 0.187185(6) nm3 for TbNi0.78Bi2 and a = 0.447493(4) nm, c = 0.925852(1) nm, V = 0.185402(6) nm3 for DyNi0.77Bi2, showing lanthanide contraction. The structure is characterized by layers of edge-sharing NiBi4 tetrahedron and covalently bonded Bi square net separated by rare earth atoms.

关键词： intermetallics rare earth nickel bismuth

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Thermal and hydrological processes in permafrost slope wetlands affect thermosyphon embankment stability

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Advances in Climate Change Research 2024年第4期15卷 680-694页

作者： Bo-Wen tai Qing-Bai WU Xiao-ming XU State Key Laboratory of Frozen Soil Engineering Key Laboratory of Cryospheric Science and Frozen Soil EngineeringNorthwest Institute of Eco-Environment and ResourcesChinese Academy of SciencesLanzhou 730000China School of Engineering Science University of Chinese Academy of SciencesBeijing 100049China

To ensure the long-term service performance of infrastructure such as railways,highways,airports and oil pipelines built on permafrost slope wetland sites,it is imperative to systematically uncover the long-term heat-water changes of soil in slope wetlands environment under climate *** specifically,considering valuable field data from 2001 to 2019,the long-term heat and water changes in active layers of the slope wetland site along the Qinghai-Xizang Railway(QXR)are illustrated,the effect of thermosyphon measures in protecting the permafrost environment is evaluated,and the influences of climate warming and hydrological effects on the stability of slope wetland embankments are systematically *** permafrost at the slope wetland site is rapidly degrading,demonstrating a reduction in active layer thickness of>3.7 cm per year and a permafrost temperature warming of>0.006℃ per *** thermosiphon embankment developed by QXR has a specific cooling period;thus,to mitigate the long-term impacts of climate warming on the thermal stability of permafrost foundation,it is essential to implement strengthening measures for the thermosiphon embankment,such as adding a crushed-rock layer or sunshade board on the slope of thermosiphon embankment to creating a composite cooling ***-term seasonal groundwater seepage intensifies frost damage to the slope wetland embankment,while long-term seasonal supra-permafrost water and groundwater seepage exacerbates uneven transverse deformation of slope wetland ***-term climate warming and slope effects have altered the surface water and groundwater hydrological processes of slope wetlands,potentially leading to an increased occurrence of slope embankment *** results are crucial for improving our understanding of heat and water variation processes in the active layer of slope wetland sites located in permafrost regions and ensuring long-term service safety for the QXR.

关键词： Heat and water process Active layer Slope wetland Permafrost environment Thermosyphon embankment

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