World Academy of Science, Engineering and Technology, International Journal of Chemical, Molecular, Nuclear, Materials and Metallurgical Engineering最新文献_第7页

Preliminary Design Of Frozen Soil Simulation System Based On Finite Element Simulation 基于有限元模拟的冻土模拟系统初步设计

World Academy of Science, Engineering and Technology, International Journal of Chemical, Molecular, Nuclear, Materials and Metallurgical Engineering Pub Date : 2011-07-22 DOI: 10.5281/ZENODO.1062587

Wenyu Song, Bingxi Li, Zhongbin Fu, B. Jiang

{"title":"Preliminary Design Of Frozen Soil Simulation System Based On Finite Element Simulation","authors":"Wenyu Song, Bingxi Li, Zhongbin Fu, B. Jiang","doi":"10.5281/ZENODO.1062587","DOIUrl":"https://doi.org/10.5281/ZENODO.1062587","url":null,"abstract":"Full - Scale Accelerated Loading System, one part of\u0000\"the Eleventh - Five - Year National Grand Technology Infrastructure\u0000Program\" is a facility to evaluate the performance and service life of\u0000different kinds of pavements subjected to traffic loading under full -\u0000controlled environment. While simulating the environments of frigid\u0000zone and permafrost zone, the accurate control of air temperature, road\u0000temperature and roadbed temperature are the key points and also\u0000aporias for the designment. In this paper, numerical simulations are\u0000used to determine the design parameters of the frozen soil simulation\u0000system. At first, a brief introduction of the Full - Scale Accelerate\u0000Loading System was given. Then, the temperature control method of\u0000frozen soil simulation system was proposed. Finally, by using finite\u0000element simulations, the optimal design of frozen soil simulation\u0000system was obtained. This proposed design, which was obtained by\u0000finite element simulations, provided significant referents to the\u0000ultimate design of the environment simulation system.","PeriodicalId":23701,"journal":{"name":"World Academy of Science, Engineering and Technology, International Journal of Chemical, Molecular, Nuclear, Materials and Metallurgical Engineering","volume":"18 1","pages":"624-627"},"PeriodicalIF":0.0,"publicationDate":"2011-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75214863","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Proton-conducting PVA/PMA Hybrid Membranes for Fuel Cell Applications 质子导电PVA/PMA混合膜在燃料电池中的应用

World Academy of Science, Engineering and Technology, International Journal of Chemical, Molecular, Nuclear, Materials and Metallurgical Engineering Pub Date : 2010-11-27 DOI: 10.5281/ZENODO.1061920

U. Thanganathan

引用次数: 2

Microstructural and In-Vitro Characterization of Glass-Reinforced Hydroxyapatite Composites 玻璃增强羟基磷灰石复合材料的显微结构和体外表征

World Academy of Science, Engineering and Technology, International Journal of Chemical, Molecular, Nuclear, Materials and Metallurgical Engineering Pub Date : 2010-01-20 DOI: 10.5281/ZENODO.1057816

U. Batra, S. Kapoor

{"title":"Microstructural and In-Vitro Characterization of Glass-Reinforced Hydroxyapatite Composites","authors":"U. Batra, S. Kapoor","doi":"10.5281/ZENODO.1057816","DOIUrl":"https://doi.org/10.5281/ZENODO.1057816","url":null,"abstract":"1 Abstract—Commercial hydroxyapatite (HA) was reinforced by adding 2, 5, and 10 wt % of 28.5%CaO-28.5%P2O5-38%Na2 O5%CaF2 based glass and then sintered. Although HA shows good biocompatibility with the human body, its applications are limited to non load-bearing areas and coatings due to its poor mechanical properties. These mechanical properties can be improved substantially with addition of glass ceramics by sintering. In this study, the effects of sintering hydroxyapatite with above specified phosphate glass additions are quantified. Each composition was sintered over a range of temperatures. Scanning electron microscopy and x-ray diffraction were used to characterize the microstructure and phases of the composites. The density, microhardness, and compressive strength were measured using Archimedes Principle, Vickers Microhardness Tester (at 0.98 N), and Instron Universal Testing Machine (cross speed of 0.5 mm/min) respectively. These results were used to indicate which composition provided suitable material for use in hard tissue replacement. Composites containing 10 wt % glass additions formed dense HA/TCP (tricalcium phosphate) composite materials possessing good compressive strength and hardness than HA. In-vitro bioactivity was assessed by evaluating changes in pH and Ca 2+ ion concentration of SBF-simulated body fluid on immersion of these composites in it for two weeks.","PeriodicalId":23701,"journal":{"name":"World Academy of Science, Engineering and Technology, International Journal of Chemical, Molecular, Nuclear, Materials and Metallurgical Engineering","volume":"85 1","pages":"81-86"},"PeriodicalIF":0.0,"publicationDate":"2010-01-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90049559","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Effect of Concentration of Sodium Borohydrate on the Synthesis of Silicon Nanoparticles via Microemulsion Route 硼水钠浓度对微乳法合成纳米硅的影响

World Academy of Science, Engineering and Technology, International Journal of Chemical, Molecular, Nuclear, Materials and Metallurgical Engineering Pub Date : 2009-11-25 DOI: 10.5281/ZENODO.1073673

W. Liong, S. Sreekantan, S. D. Hutagalung

引用次数: 5

Methane and Other Hydrocarbon Gas Emissions Resulting from Flaring in Kuwait Oilfields 科威特油田燃烧产生的甲烷和其他碳氢化合物气体排放

World Academy of Science, Engineering and Technology, International Journal of Chemical, Molecular, Nuclear, Materials and Metallurgical Engineering Pub Date : 2009-11-01 DOI: 10.5772/7400

Khaireyah Kh. AL-Hamad, V. Nassehi, A. Khan

{"title":"Methane and Other Hydrocarbon Gas Emissions Resulting from Flaring in Kuwait Oilfields","authors":"Khaireyah Kh. AL-Hamad, V. Nassehi, A. Khan","doi":"10.5772/7400","DOIUrl":"https://doi.org/10.5772/7400","url":null,"abstract":"Air pollution is a major environmental health problem, affecting developed and developing countries around the world. Increasing amounts of potentially harmful gases and particulate matter are being emitted into the atmosphere on a global scale, resulting in damage to human health and the environment. Petroleum-related air pollutants can have a wide variety of adverse environmental impacts. In the crude oil production sectors, there is a strong need for a thorough knowledge of gaseous emissions resulting from the flaring of associated gas of known composition on daily basis through combustion activities under several operating conditions. This can help in the control of gaseous emission from flares and thus in the protection of their immediate and distant surrounding against environmental degradation. The impacts of methane and non-methane hydrocarbons emissions from flaring activities at oil production facilities at Kuwait Oilfields have been assessed through a screening study using records of flaring operations taken at the gas and oil production sites, and by analyzing available meteorological and air quality data measured at stations located near anthropogenic sources. In the present study the Industrial Source Complex (ISCST3) Dispersion Model is used to calculate the ground level concentrations of methane and non- methane hydrocarbons emitted due to flaring in all over Kuwait Oilfields. The simulation of real hourly air quality in and around oil production facilities in the State of Kuwait for the year 2006, inserting the respective source emission data into the ISCST3 software indicates that the levels of non-methane hydrocarbons from the flaring activities exceed the allowable ambient air standard set by Kuwait EPA. So, there is a strong need to address this acute problem to minimize the impact of methane and non-methane hydrocarbons released from flaring activities over the urban area of Kuwait.","PeriodicalId":23701,"journal":{"name":"World Academy of Science, Engineering and Technology, International Journal of Chemical, Molecular, Nuclear, Materials and Metallurgical Engineering","volume":"16 1","pages":"144-152"},"PeriodicalIF":0.0,"publicationDate":"2009-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81881725","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 5

An Experimental Study on Autoignition of Wood 木材自燃的实验研究

World Academy of Science, Engineering and Technology, International Journal of Chemical, Molecular, Nuclear, Materials and Metallurgical Engineering Pub Date : 2009-11-01 DOI: 10.5772/7398

T. Poespowati

引用次数: 6

CAD/CAM Algorithms for 3D Woven Multilayer Textile Structures 三维编织多层织物结构的CAD/CAM算法

World Academy of Science, Engineering and Technology, International Journal of Chemical, Molecular, Nuclear, Materials and Metallurgical Engineering Pub Date : 2009-09-28 DOI: 10.5281/ZENODO.1059552

Martin A. Smith, Xiaogang Chen

{"title":"CAD/CAM Algorithms for 3D Woven Multilayer Textile Structures","authors":"Martin A. Smith, Xiaogang Chen","doi":"10.5281/ZENODO.1059552","DOIUrl":"https://doi.org/10.5281/ZENODO.1059552","url":null,"abstract":"This paper proposes new algorithms for the computeraided\u0000design and manufacture (CAD/CAM) of 3D woven multi-layer\u0000textile structures. Existing commercial CAD/CAM systems are often\u0000restricted to the design and manufacture of 2D weaves. Those\u0000CAD/CAM systems that do support the design and manufacture of\u00003D multi-layer weaves are often limited to manual editing of design\u0000paper grids on the computer display and weave retrieval from stored\u0000archives. This complex design activity is time-consuming, tedious\u0000and error-prone and requires considerable experience and skill of a\u0000technical weaver. Recent research reported in the literature has\u0000addressed some of the shortcomings of commercial 3D multi-layer\u0000weave CAD/CAM systems. However, earlier research results have\u0000shown the need for further work on weave specification, weave\u0000generation, yarn path editing and layer binding. Analysis of 3D\u0000multi-layer weaves in this research has led to the design and\u0000development of efficient and robust algorithms for the CAD/CAM of\u00003D woven multi-layer textile structures. The resulting algorithmically\u0000generated weave designs can be used as a basis for lifting plans that\u0000can be loaded onto looms equipped with electronic shedding\u0000mechanisms for the CAM of 3D woven multi-layer textile structures.","PeriodicalId":23701,"journal":{"name":"World Academy of Science, Engineering and Technology, International Journal of Chemical, Molecular, Nuclear, Materials and Metallurgical Engineering","volume":"104 1","pages":"538-549"},"PeriodicalIF":0.0,"publicationDate":"2009-09-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79222276","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 8

Fenton's oxidation as post-treatment of a mature municipal landfill leachate. Fenton氧化法处理成熟城市垃圾渗滤液。

World Academy of Science, Engineering and Technology, International Journal of Chemical, Molecular, Nuclear, Materials and Metallurgical Engineering Pub Date : 2009-09-21 DOI: 10.5281/ZENODO.1055902

Susana Cortez, P. Teixeira, Rosário Oliveira, M. Mota

引用次数: 6

Performance of InGaN/GaN Laser Diode Based on Quaternary Alloys Stopper and Superlattice Layers 基于季元合金阻塞层和超晶格层的InGaN/GaN激光二极管性能研究

World Academy of Science, Engineering and Technology, International Journal of Chemical, Molecular, Nuclear, Materials and Metallurgical Engineering Pub Date : 2009-07-23 DOI: 10.5281/zenodo.1062654

S. Thahab, H. A. Hassan, Z. Hassan

引用次数: 1

Equilibrium, Kinetics and Thermodynamic Studies for Adsorption of Hg (II) on Palm Shell Powder 棕榈壳粉吸附Hg (II)的平衡、动力学和热力学研究

World Academy of Science, Engineering and Technology, International Journal of Chemical, Molecular, Nuclear, Materials and Metallurgical Engineering Pub Date : 2008-07-29 DOI: 10.5281/ZENODO.1057703

S. Kushwaha, S. Sodaye, P. Padmaja

{"title":"Equilibrium, Kinetics and Thermodynamic Studies for Adsorption of Hg (II) on Palm Shell Powder","authors":"S. Kushwaha, S. Sodaye, P. Padmaja","doi":"10.5281/ZENODO.1057703","DOIUrl":"https://doi.org/10.5281/ZENODO.1057703","url":null,"abstract":"Palm shell obtained from coastal part of southern India was studied for the removal for the adsorption of Hg (II) ions. Batch adsorption experiments were carried out as a function of pH, concentration of Hg (II) ions, time, temperature and adsorbent dose. Maximum removal was seen in the range pH 4.0- pH 7.0. The palm shell powder used as adsorbent was characterized for its surface area, SEM, PXRD, FTIR, ion exchange capacity, moisture content, and bulk density, soluble content in water and acid and pH. The experimental results were analyzed using Langmuir I, II, III, IV and Freundlich adsorption isotherms. The batch sorption kinetics was studied for the first order reversible reaction, pseudo first order; pseudo second order reaction and the intra-particle diffusion reaction. The biomass was successfully used for removal Hg (II) from synthetic and industrial effluents and the technique appears industrially applicable and viable. Keywords—Biosorbent, mercury removal, borassus flabellifer, isotherms, kinetics, palm shell.","PeriodicalId":23701,"journal":{"name":"World Academy of Science, Engineering and Technology, International Journal of Chemical, Molecular, Nuclear, Materials and Metallurgical Engineering","volume":"33 1","pages":"113-119"},"PeriodicalIF":0.0,"publicationDate":"2008-07-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77721751","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 34