检索结果-内蒙古大学图书馆

Improved image analysis using digital media technology

Computer Modelling and New Technologies 2014年第12期18卷 704-710页

作者： Li, Yang Bo Xu, Ze Yu Sun, Dong Department of Computer Science and Technology Henan Mechanical and Electrical Engineering College Xinxiang Henan China Material Science and Engineering Zhengzhou University Zhengzhou Henan China

Digital image correlation and image registration or matching are among the most widely used techniques in the fields of experimental mechanics and computer vision, respectively. Despite their applications in separate fields, both techniques primarily involve detecting the same physical points in two or more images. In recent years, with the requirement of high-resolution and real-time measurement, the computation speed of digital image correlation (DIC) has become increasingly important. At present, the DIC algorithms based on the iterative spatial domain cross-correlation algorithm are widely recognized as the most robust and rapid. In this paper, the integral image technique is extended to handle the complex items in the equations of the DIC algorithm in order to accelerate the calculation process. The influence of the interpolation method on the performance of the DIC algorithm is also investigated. In addition, the analysis of computational complexity and numerical experiment results are presented to illustrate the effectiveness of this method. The results successfully verify that the proposed method can improve the computation speed of the DIC algorithm greatly, and the improvement is more notable when the fast interpolation method is utilized. In this paper a modification of a high-speed correlation system for the purposes of mechanical structures modal parameters estimation is described. Together with hardware modification an original version of a program Modan 3D was created, which is a complex tool for execution of an experimental and operational modal analysis.

关键词： Image correlation

来源：评论

学校读者我要写书评

暂无评论

Tunable Release of Multiplex Biochemicals by Plasmonically Active Rotary Nanomotors†

引用

Angewandte Chemie 2015年第8期127卷

作者： Xiaobin Xu Kwanoh Kim Donglei Fan Materials Science and Engineering Program Texas Materials Institute The University of Texas at Austin Austin TX 78712 (USA) Mechanical Engineering The University of Texas at Austin Austin TX 78712 (USA)

It is highly desirable to precisely tune the molecule release rate from the surfaces of nanoparticles (NPs) that are relevant to cancer therapy and single‐cell biology. An innovative mechanism is reported to actively tune the biochemical release rate by rotation of NPs. Plasmonic nanomotors were assembled from NPs and applied in multiplex biochemical release and detection. Both single and multiplex biosignals can be released in a tunable fashion by controlling the rotation speed of the nanomotors. The chemistry and release rate of individual chemicals can be revealed by Raman spectroscopy. The fundamental mechanism was modeled quantitatively and attributed to the fluidic boundary‐layer reduction owing to the liquid convection. This work, which explored the synergistic attributes of surface enhanced Raman scattering and nanoelectromechanical systems, could inspire new sensors that are potentially interesting for various bio‐applications.

关键词： Biosensoren Nanomotoren Nanorobotik SERS Wirkstoff‐Freisetzung

来源：评论

学校读者我要写书评

暂无评论

Erratum to: The Effect of Quench-Induced Residual Stresses on the Distortion of Machined Thin-Walled Parts

引用

Journal of materials engineering and Performance 2015年第2期25卷 718-718页

作者： Masoudi, Soroush Amirian, Ghasem Saeedi, Ehsan Ahmadi, Mohammad Young Researchers and Elite Club Najafabad Branch Islamic Azad University Najafabad Iran Department of Mechanical Engineering Yazd University Yazd Iran Department of Material Engineering Iran University of Science and Technology Tehran Iran

来源：评论

学校读者我要写书评

暂无评论

Effect of the geometry of the draft tube on mixing in the reactor with internal circulation loop - CFD simulation 21

Effect of the geometry of the draft tube on mixing in the re...

引用

21st International Congress of Chemical and Process engineering, CHISA 2014 and 17th Conference on Process Integration, Modelling and Optimisation for Energy Saving and Pollution Reduction, PRES 2014

作者： Lestinsky, P. Vecer, M. Vayrynen, P. Brno University of Technology Faculty of Mechanical Engineering Technicka 2 Brno61669 Czech Republic VSB-Technical University of Ostrava Faculty of Metallurgy and Material Engineering 17. listopadu 15 Ostrava70833 Czech Republic Aalto University School of Science and Technology Dept. of Metallurgy Vuorimiehentie 2 Espoo Finland

ISBN: (纸本)9781510828131

The main topic of present paper is to describe the effect of geometrical parameters on mixing time in the reactor with internal circulation loop. Laboratory scale apparatus with internal circulation loop consists of concentric draft tube, in which gas bubbles rise. Design of draft tube inside of reactor is important geometry parameter and has big influence on two phase hydrodynamics as well as on mass transfer in the reactor. In the first part here, the validation of selected mathematical model (mixed flow) is carried out. Results of experimental measurements (liquid velocity and gas hold-up) obtained on the laboratory scale reactor with internal circulation loop are compared with the CFD simulations. The CFD simulation (bubbly flow and mass transfer models) was made by COMSOL Multiphysics version 3.5a. The obtained results of numerical simulation are in good agreement with experimental data. In the second part, the study of mixing in the reactor with new geometry of the draft tube is described. The standard experimental techniques for testing of mixing processes are quite problematic, because common tracers (soluble salts) have significant influence on the two phase hydrodynamics inside the reactor. So the alternative nontrivial method should be used. Obtained results show that the split of the draft tube onto two or three zones has significant effect onto mixing (mass transfer) in the reactor. © Copyright 2014 by Czech Society of Chemical Engineerig

关键词：

来源：评论

学校读者我要写书评

暂无评论

Corrigendum to "Combination therapy with lenalidomide and nanoceria ameliorates CNS autoimmunity", [Exp. Neurol. 273 (2015), 151-160]

引用

Experimental neurology 2016年 280卷 121页

作者： Erez Eitan Emmette R Hutchison Nigel H Greig David Tweedie Hasan Celik Soumita Ghosh Kenneth W Fishbein Richard G Spencer Carl Y Sasaki Paritosh Ghosh Soumen Das Susheela Chigurapati James Raymick Sumit Sarkar Srinivasulu Chigurupati Sudipta Seal Mark P Mattson Laboratory of Neurosciences National Institute on Aging Intramural Research Program Baltimore MD 21224 USA. Translational Gerontology Branch National Institute on Aging Intramural Research Program Baltimore MD 21224 USA. Laboratory of Clinical Investigation National Institute on Aging Intramural Research Program Baltimore MD 21224 USA. Laboratory of Immunology National Institute on Aging Intramural Research Program Baltimore MD 21224 USA. Material Science and Engineering College of Medicine University of Central Florida Orlando FL 32816 USA. Arkansas Regional Laboratory Office of Regulatory Affairs U.S. Food and Drug Administration 3900 NCTR Road Building 26 Jefferson AR 72079 USA. Division of Neurotoxicology National Center for Toxicological Research/FDA Jefferson AR 72079 USA. Advanced Materials Processing and Analysis Centre Nanoscience Technology Center Mechanical Materials Aerospace Engineering University of Central Florida Orlando FL 32816 USA. Laboratory of Neurosciences National Institute on Aging Intramural Research Program Baltimore MD 21224 USA Department of Neuroscience Johns Hopkins University School of Medicine Baltimore MD 21205 USA. Electronic address: mark.mattson@nih.gov.

来源：评论

学校读者我要写书评

暂无评论

Effect of trace calcium on melting behavior of Ag-Cu-Zn brazing alloy by thermal analysis kinetics

Effect of trace calcium on melting behavior of Ag-Cu-Zn braz...

引用

2014 International Conference on Brazing,Soldering and Special Joining Technologies

作者： Li Bao Weimin Long Guanxing Zhang Fangfei Sui Jia Ma Yinyin Pei Sujuan Zhong State Key Laboratory of Advanced Brazing Filler Metals & Technology Zhengzhou Research Institute of Mechanical Engineering School of Material Science and Engineering Zhengzhou University

The purity of the brazing alloys applied in some special fields is necessary to be improved with the increasing cleanness of steel. Calcium is easily brought into the widely used filler metal, Ag-Cu-Zn, during the producing process. This paper aims at revealing the effect of calcium on the melting behavior of the brazing alloy. The thermal analysis kinetics of silver alloy with trace calcium was studied using differential scanning calorimetry(DSC), and the enthalpy peaks were analyzed by differential methods. The rate constant of phase transformation in the probable brazing temperature range goes up with increasing calcium content, according to the values of the apparent activation energy, E, and the frequency constant, A. It is concluded that the calcium addition could improve the melting behavior of Ag-Cu-Zn brazing alloy.

关键词： Silver brazing alloy,Thermal analysis kinetics,Melting behavior,Apparent activation energy,Frequency constant

来源：评论

学校读者我要写书评

暂无评论

Silica dust exposure: Effect of filter size to compliance determination

引用

AIP Conference Proceedings 2016年第1期1784卷

作者： Suhaily Amran Mohd Talib Latif Md Firoz Khan Abdul Mutalib Leman Eric Goh Shoffian Amin Jaafar 1Laboratory Division Consultation Research and Development Department National Institute of Occupational Safety and Health (NIOSH) Lot 1 Jln 15/1 Section 15 43650 Bandar Baru Bangi Malaysia 2School of Environmental Science and Natural Resources Faculty of Science and Technology Universiti Kebangsaan Malaysia(UKM) 43650 Bandar Baru Bangi Selangor. Tel: 03 89213822 Malaysia 3Centre for Tropical Climate Change System (IKLIM) Institute of Climate Change Universiti Kebangsaan Malaysia 43600 Bangi Selangor Malaysia. Email: mdfiroz.khan@ukm.edu.my 4Department of Mechanical Engineering Technology Faculty of Engineering technology. Universiti Tun Hussein Onn Malaysia(UTHM) 86400 Parit Raja Batu Pahat. Johor Malaysia 5School of Material and Mineral Resource Engineering Unversiti Sains Malaysia(USM) 14300 Nibong tebal Pulau Pinang Malaysia

Monitoring of respirable dust was performed using a set of integrated sampling system consisting of sampling pump attached with filter media and separating device such as cyclone or special cassette. Based on selected method, filter sizes are either 25 mm or 37 mm poly vinyl chloride (PVC) filter. The aim of this study was to compare performance of two types of filter during personal respirable dust sampling for silica dust under field condition. The comparison strategy focused on the final compliance judgment based on both dataset. Eight hour parallel sampling of personal respirable dust exposure was performed among 30 crusher operators at six quarries. Each crusher operator was attached with parallel set of integrated sampling train containing either 25 mm or 37 mm PVC filter. Each set consisted of standard flow SKC sampler, attached with SKC GS3 cyclone and 2 pieces cassette loaded with 5.0 µm of PVC filter. Samples were analyzed by gravimetric technique. Personal respirable dust exposure between the two types of filters indicated significant positive correlation (p < 0.05) with moderate relationship (r2 = 0.6431). Personal exposure based on 25 mm PVC filter indicated 0.1% non-compliance to overall data while 37 mm PVC filter indicated similar findings at 0.4 %. Both data showed similar arithmetic mean(AM) and geometric mean(GM). In overall we concluded that personal respirable dust exposure either based on 25mm or 37mm PVC filter will give similar compliance determination. Both filters are reliable to be used in respirable dust monitoring for silica dust related exposure.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Effect of Nanostructured Oxide Coatings on Tensile Properties of Cast Pure Magnesium

Effect of Nanostructured Oxide Coatings on Tensile Propertie...

引用

2014 International Conference on Advances in materials (ICAM 2014)

作者： Jonathan HU Xueyuan NIE Medical Science Program Faculty of Science Western University Department of Mechanical Automotive and Materials Engineering University of Windsor

ISBN: (纸本)9783038354024

In this work,nanostructured magnesium oxides were formed by PEO process on cast pure magnesium and the tensile properties of thin(5.8 μm) and thick(11.2 μm) coated samples were *** results obtained by uniaxial tensile testing show that the thin PEO coating had very little effect on the ultimate tensile strength(UTS) and elongation of the cast pure magnesium,while its yield strength was somewhat *** the thick coated sample,both the yield strength and UTS decreased considerably,but the variation of the elongation was moderate,compared to the uncoated *** microstructures characterized by SEM revealed that the high porosity content and the large size of pores in the thick PEO coating should be responsible for the significant reduction in the properties of cast pure *** relationship between the tensile properties and microstructure of the PEO coated samples suggests that the thin PEO coating should be selected to protect the pure magnesium for biodegradable applications.

关键词： PEO Nano-Coating,Pure Magnesium,Tensile Properties,Microstructure,Fractography

来源：评论

学校读者我要写书评

暂无评论

Development of new generation bone graft material: Silver, silicon co-substituted apatite with bi-functional properties

Development of new generation bone graft material: Silver, s...

引用

2013 MRS Fall Meeting

作者： Lim, Poon Nian Chang, Lei Ho, Bow Tay, Bee Yen Cleo, Choong Thian, Eng San Department of Mechanical Engineering National University of Singapore 9 Engineering Drive 1 Singapore 117 576 Singapore Department of Microbiology Yong Loo Lin School of Medicine National University of Singapore 5 Science Drive 2 Singapore 119757 Singapore Singapore Institute of Manufacturing Technology 71 Nanyang Drive Singapore 638 075 Singapore School of Material Science and Engineering Nanyang Technological University 50 Nanyang Avenue Singapore 639 798 Singapore

With the rise of ageing population, the need to restore the function of degenerative bone greatly drives the market for bone grafts. Hydroxyapatite (HA) is chemically similar to natural bone mineral and has been widely used in bone graft applications. However, its slow osseointegration process and lack of antibacterial property could lead to implant-related infection, resulting in implant failure. Studies on ionic substitution of apatite have gained attention in recent years with greater understanding of the composition of bone mineral being a multi-substituted apatite. An integrated approach is proposed by co-substituting silver (Ag) and silicon (Si) into HA (Ag,Si-HA) to modify its surface for bi-functional properties. Incorporation of Si can enhance the biomineralization of HA and introduction of Ag can create antibacterial property. Ag,Si-HA containing 0.5 wt.% of Ag and 0.8 wt.% of Si was prepared by a wet precipitation method. A phase-pure apatite with a nanorod morphology of dimensions 60 nm in length and 10 nm in width was synthesized. Surface Ag + ions of Ag,Si-HA were demonstrated to prevent the replication of adherent Staphylococcus aureus bacteria for up to 120 h. Biocompatibility tests revealed that human adipose-derived mesenchymal stem cells (hMSCs) proliferated well on Ag,Si-HA with culturing time. Enhanced cell attachment in turn permitted greater bone differentiation as evidenced in the increase of collagen type I and osteocalcin expressions of hMSCs cultured on Ag,Si-HA as compared to HA from day 14 onwards. Overall, co-substitution of Ag and Si could complement the benefits of each substituent by endowing HA with antibacterial property, and concurrently promoting its biological performance. Their synergistic effects can serve unmet medical needs and solve the problem of implant-related infection. This work also enhances the understanding of substituted apatite with multiple ions for bi-functional properties. Copyright © materials Research Society

关键词： Silicon

来源：评论

学校读者我要写书评

暂无评论

Anaerobic sequencing batch reactor in pilot scale for treatment of tofu industry wastewater

引用

AIP Conference Proceedings 2015年第1期1699卷

作者： Suparni Setyowati Rahayu Purwanto Budiyono 1Doctoral Program in Environmental Science University of Diponegoro Semarang Indonesia 2Department of Mechanical Engineering State Polytechnic of Semarang Semarang Indonesia 3Department of Chemical Engineering Faculty of Engineering Diponegoro University Semarang Indonesia

The small industry of tofu production process releases the waste water without being processed first, and the wastewater is directly discharged into water. In this study, Anaerobic Sequencing Batch Reactor in Pilot Scale for Treatment of Tofu Industry was developed through an anaerobic process to produce biogas as one kind of environmentally friendly renewable energy which can be developed into the countryside. The purpose of this study was to examine the fundamental characteristics of organic matter elimination of industrial wastewater with small tofu effective method and utilize anaerobic active sludge with Anaerobic Sequencing Bath Reactor (ASBR) to get rural biogas as an energy source. The first factor is the amount of the active sludge concentration which functions as the decomposers of organic matter and controlling selectivity allowance to degrade organic matter. The second factor is that HRT is the average period required substrate to react with the bacteria in the Anaerobic Sequencing Bath Reactor (ASBR).The results of processing the waste of tofu production industry using ASBR reactor with active sludge additions as starter generates cumulative volume of 5814.4 mL at HRT 5 days so that in this study it is obtained the conversion 0.16 L of CH4/g COD and produce biogas containing of CH4: 81.23% and CO2: 16.12%. The wastewater treatment of tofu production using ASBR reactor is able to produce renewable energy that has economic value as well as environmentally friendly by nature.

关键词：

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：