bluuebunny/crossref_metadata_2025 huggingface dataset:
Study on the Mechanical Properties of Steel - Polyurethane Tube
Authors: Mi Xu Feng , Jin Xiao Qun , Zhao Wei Wei
Published: February 2014

Steel-polyurethane tube can be widely used in civil engineering. In this paper, 6 axial compression specimens test was carried out on steel-polyurethane tube, the results showed that the deformation of steel - polyurethane composite tube (SPCT) appears the bow drum, the bonding performance between polyurethane and steel is so good that the peeling did not occur. From the load displacement curve and test process, it can be gotten that specimen curve was generally composed of elastic, elastic-plastic, descent and strengthening phases, and it indicated that SPCT has sound ductility and strength reserve to resist dynamic loads.
Design and Analysis of Self-Collimation-Based Photonic Crystal Beam Splitter
Authors: Li Hong Jing , Chen Li An
Published: February 2014

We present a self-collimation-based beam splitter in a two-dimensional photonic crystal (2D-PC) by introducing defects near the termination. From the equi-frequency contour (EFC) calculations and the finite-difference time-domain (FDTD) simulations, we show that the defects can give rise to the splitting of self-collimated beams in 2D-PCs and the directivity of the deflected beam can be improved by the defect along the PC surface. In order to get different kinds of beam splitters, including the Y-shaped, one-to-three, one-to-four structures, and so on, we only need to modify the structure of the output surface (along X-M direction). The proposed splitter may have practical applications in integrated photonic circuits.
Electronic Structures and Spectral Properties of 4-Thiophene-1,8-Naphthalimide Derivatives
Authors: Wang Yan , Tang Han Wei , Nie Guang Hua
Published: February 2014

The molecular geometries, frontier molecular orbital properties, absorption and emission properties of seven 4-thiophene-1,8-naphthalimide derivatives are studied. The ground state optimized structures are obtained by density functional theory (DFT). The lowest singlet states are studied with the configuration interaction singles (CIS) approach. The transition energies of absorption and emission are obtained using time-dependent density functional theory (TD-DFT). It was found that, the 1,8-naphthalimide derivatives with an electron-donating group on the thiophene ring have enhanced fluorescence properties. Our calculations are in good agreement with the experiment results.
Hot corrosion resistance of four graphite material in molten Solar Salt
Authors: Xu Yang Tao , Wang Wan Ping , Xia Tian Dong , Jia Bao Lin , Zhang Gui Lan
Published: February 2014

Solar Salt is the best hot transfer medium molten salt of solar thermal power generation.In order to study the hot corrosion behavior of four graphite is in the molten Solar Salt.The graphite immersed equipped with molten salt crucible placed in a muffle furnace,each period of time remove the sample and weight the weight gain until the sample is completely destroyed.The destruction forming of graphite is analyzed by XRD, SEM and OP.The study found that the order of hot resistant corrosion of molten Solar Salt of four graphite materials are the fine structuregraphite,isostatic graphite,9# graphite and cold pressing graphite.The principal factors can affect hot corrosion resistant of graphite is the graphitization degree. The hot corrosion resistance of the graphite can be enhanced with the increase of graphitization degree.
Study on the Surfactant/Polymer Combination Flooding Relative Permeability Curves in Offshore Heavy Oil Reservoirs
Authors: Jiang Wen Chao , Zhang Jian , Song Kao Ping , Tang En Gao , Huang Bin
Published: February 2014

Different kinds of compound solutions were prepared by using different concentrations of hydrophobically associating polymers and sulfonate type surfactant. The static viscosity and interfacial tension of these solutions were measured. On the experimental conditions of the Suizhong 36-1 oilfield, the relative permeability curves of the water flooding and the surfactant/polymer combination flooding were measured through the constant speed unsteady method and the experimental data were processed through the way of J.B.N. The several existing kinds of viscosity processing methods of non-newtonian fluid were compared and analysed , and a new way is put forward . The results show that the relative permeability of the flooding phase is very low while displacing the heavy oil; the relative permeability of oil in combination flooding is higher than that in water flooding, the relative permeability of flooding phase in combination flooding is lower than that in water flooding and the residual oil saturation of combination flooding is lower than that of water flooding. Meanwhile, the concentrations of polymer and surfactant have a great influence on the surfactant/polymer combination relative permeability curves.
Anthocyanins Extracted from Chinese Blueberry and its Anticancer Effects on HepG2 Cells
Authors: Li Ya Wei , Wang Dan , Li Xiao Guang , Jin Ying
Published: February 2014

Recently studies have demonstrated that anthocyanins from blueberry have anticancer effects. Here, HepG2 cells were treated with anthocyanins (200、400、600、800 and 1000 μg/ml) for 48h, the effects on cell proliferation and apoptosis were investigated. The results suggested that anthocyanins can inhibit the proliferation of HepG2 cells in a dose-dependent manner. The activity of caspase-3 was increased in the anthocyanins treatment group. Moreover, results of Western blotting shown that the expression of Caspase-3 protein increased significantly in the treatment group. Taken together, our data suggest that anthocyanins could be developed as an agent against liver cancer.
Optimization of Aflatoxin Production of Aspergillus flavus on Peanuts
Authors: Zhang Chu Shu , Sun Jie , Yu Li Na , Bi Jie , Feng Jian Xiong , Yang Qing Li
Published: February 2014

To optimize aflatoxin production of Aspergillus flavus on peanut, the response surface methodology were applied based on previous experiment. The results showed that the influence of water content of peanuts,time and relative humidity were obvious and were not linear relationship. The optimal aflatoxin production conditions were that water content of peanuts was12%, the time was 7 days, relative humidity was 80%.
The Sensory Quality and Textural Property of Ready-to-Eat Sea Cucumber in Storage Period
Authors: Hou Hong Man , Cui Yu Na , Tang Liang , Zhang Gong Liang , Sun Li Ming
Published: February 2014

In order to research the quality-change of Ready-to-eat sea cucumbers in the storage period. The Ready-to-eat sea cucumbers were respectively stored under 5, 10 and 15 °C to determine the sensory quality and textural property. The results showed that: During the storage period, the quality of the Ready-to-eat sea cucumbers decreased gradually. When the sense of the samples declined to the acceptability limit, the smell and the surface viscosity changed significantly. The value of hardness, elasticity, cohesiveness and chewiness were determined the sensory acceptable limit at different stored temperature.
Application of Matlab Data Processing System in Research of Drug Microemulsion
Authors: Wei Hong , Lu Gang , Lu Yi Chen , Fu Zheng
Published: February 2014

A new O/W microemulsion system for transdermal matrine delivery was developed in order to improve the skin permeability and solubility of matrine. Various factors were investigated including solubility of matrine,the skin permeability of matrine aiming to choose suitable surfactants, cosurfactants and oils. By drawing the pseudo-ternary phase diagrams, the basic prescription of microemulsion were determined. A simplex lattice experiment design was adopted to optimize the composition of microemulsions.The mathematical software Matlab be used to calculate the predicted values to determine the optimization of microemulsion formulation.
Study on the Clean Production Process of Basic Chromium Sulphate
Authors: Zhang Bo , Chi Wen Hai , Shi Pei Yang , Liu Cheng Jun , Jiang Mao Fa
Published: February 2014

The pollution of chromium salt industry is increasingly serious in China and becomes a worldwide problem with the rapid development of chromium salt industry. Then a new clean production process with a high recovery rate of chromium and pollution-free was proposed according to the comprehensive summary of existing processes of basic chromium sulphate. Furthermore, a small amount of slag will be discharged in this short process with lower energy consuming. The design concept is also applicable to the preparation of other chromium salts products, which will eliminate the pollution of Cr6+ during the process of chromium salt production and be helpful to the comprehensive utilization of chromium salt. In addition, the guidance of scholar research and the broad application prospects of this work cannot be neglected.
Preparation and Characterization of High Porosity and High Oil-Absorbent Block CMCS Aerogel
Authors: Guo Wan Tao , Lu Ling Bin , Shi Jian Jun , Sun Jia Yu
Published: February 2014

Carboxymethyl chitosan aerogel was prepared by freeze-drying method with glutaraldehyde as crosslinking agent. The effect of different concentrations of crosslinking agent and solvent on the gel time and porosity was investigated. The absorption capacity of aerogel was investigated with different oils (gasoline, diesel oil, peanut oil, dimethyl silicone). The results were shown as 1) the highest porosity of the aerogel was 95.01% and the lowest density was 0.026g/cm3. 2) The optimum preparation condition was the concentration of crosslinking agent 20%, the solvent concentration 2%. Oil absorption capacity of the aerogel was up to the maximum of 28.6g/g (to dimethyl silicone), which was higher than to the other three oils. This work offered a preparation method for the high porosity, high oil-absorbing massive carboxymethyl chitosan aerogel and revealed its potential application in the treatment of oil pollution.
Preparation and Photocatalytic Performance Study of Na+/K+-WO3 by Ultrasonic Micro Method
Authors: Diao Xian Zhen , Peng Zhu Lin
Published: February 2014

With n-butanol/CTAB/cyclohexane as micro emulsion system, sodium tungstate and hydrochloric acid as raw material, alkali metals (Na+, K+) nitrate as dopant, pure WO3、Na+-WO3, K+-WO3 and Na+/K+-WO3 powders were prepared by ultrasonic micro-emulsion method; And performances of samples were analyzed by visible spectrophotometer. Photocatalytic activity study show that alkali metal sodium ion and potassium ion doped, photocatalytic activities of WO3 are improved markedly; When doping amount is 1.0%, catalyst amount is 2g/L, methyl orange concentration is 20mg/L, degradation time is 80 min, Na+-WO3 powder has the best photocatalytic degradation performance at 460nm, and the degradation rate is as high as 65%.
Synthesis and Crystal Structure of 4-[5-(2-Bromophenyl)-1,3,4-Thiadiazol-2-Ylthio]-2-(trifluoromethyl)thieno[2,3-d]pyrimidine
Authors: Yang Ping , Gao Hui , Nie Yao , Zeng Zhen , Zhao Jin Shun , Song Xin Jian
Published: February 2014

4-[5-(2-Bromophenyl)-1,3,4-thiadiazol-2-ylthio]-2-(trifluoromethyl)thieno[2,3-d]pyrimidine was synthesized by a facile three-step procedure, including the cyclization of 2-aminothiophene-3-carbonitrile with trifluoroacetic acid, chlorination and nucleophilic substitution reaction. This protocol offers such advantages as mild reaction conditions, simple purification and good yields. The structure of the product was characterized by 1H NMR, MS, elemental analysis and single-crystal X-ray diffraction. X-Ray diffraction analysis reveals that the title molecule essentially assumes a planar conformation except for the F atoms.
Preparation and Characterization of Polyurethane Foams from Modified Rosin-Based Polyether Polyol
Authors: Zhang Meng , Zhang Li Qiang , Zhou Yong Hong
Published: February 2014

Rosin based polyether polyols were synthesized from rosin formaldehyde adduct, propylene epoxide and ethylene epoxide in the presence of catalyst. Rigid polyurethane foams (PUFs) were prepared with these rosin-based polyols and compared with foam made with an industrial polyether polyol (TC-4110) and rosin-based polyester polyols. The mechanical and thermal properties of foams were analyzed by some methods. The experimental results show that the foaming behavior for the foams prepared from such rosin based polyether polyols is similar to that of industrial products, but the reaction activities were higher, the viscosities are much lower. Furthermore, their 10% compression strength and thermal stability were higher and the dimensional stability is similar or somewhat better than that of TC-4110 system. All these unique properties of rigid PUFs made with rosin based polyether polyols were more suitable for as industrial production.
Numerical Simulation of Film Thickness Uniformity Deposited by Planar Circular Magnetron Sputtering System
Authors: Zhou Qing Xiao , Wang Chao Yang , Fu Zhi Bing , Tang Yong Jian
Published: February 2014

There exist angular offset and eccentricity between target and substrate in most practical multi-target magnetron sputtering systems, which should be seriously considered when we calculate the film distribution. This simulation results suggested that excellent thickness uniformity can be obtained when increased the substrate-target distance, angular offset, and eccentricity, but decreased the film thickness simultaneously. However, superior uniformity films without reducing the thickness remarkably can also obtained when the geometry configuration are proper configured.
Thermal Stability of Ultralow k Carbon-Bridged Periodic Mesoporous Organosilica Film
Authors: Jiang Tao , Ding Shi Jin , Fan Zhong Yong , Zhang Wei
Published: February 2014

Periodic mesoporous organosilica film was prepared via sol-gel and spin-coating methods using a 1, 2-bis (triethoxysilyl) ethane (BTEE) and a poly (ethylene oxide)-poly (propylene oxide)-poly (ethylene oxide) triblock copolymer template (P123). Thermal treatment at 350°C for 1h resulted in the formation of ultralow dielectric constant (k) film with a k value of 1.82, a leakage current density of 1.58×10-9 A/cm2 at 0.5MV/cm, Youngs modulus of 6.45 GPa, and hardness of 0.58 GPa. Further, thermal treatment at higher temperature up to 500°C still achieves an ultralow k value smaller than 2.0, similar leakage current characteristics, and enhanced mechanical properties. These indicate that synthesized PMO film has robust thermal stability, and very good potential for the application of next-generation inter-level dielectrics.
Development of Reinforced Structure Designed Composite Pavement
Authors: Hou Zhong Ming , Duan Ling , Yao Kai , Zhao Xiao Wen
Published: February 2014

For the problems such as layering and splitting of traditional sandwich structure composite, a resin matrix composite with lattice and interface reinforced structure has been designed, and using vacuum forming process was developed in this paper. The composite material has high specific strength and stiffness. On this basis, a road pavement developed by this composite material used in engineer urgent was designed. This composite pavement with characters of light weight, high strength and good toughness, and its surface plate was hard, wear-resistant and non-slip. The connection between the pavements was designed for quick assembling, which could make the pavement assemble operation was simple, fast and reliable.
Design and Experiment on the Road Pavement for Rush to Repair
Authors: Yao Kai , Wang Fu Hua , Hou Zhong Ming , Zhao Xiao Wen , Wen Zhan Bin
Published: February 2014

For the problems such as layering and splitting of traditional sandwich structure composite, a resin matrix composite with lattice and interface reinforced structure has been designed, The composite material has high specific strength and stiffness. On this basis, a road pavement developed by this composite material used in engineer urgent was designed. The connection between the pavements was designed for quick assembling, which could make the pavement assemble operation was simple, fast and reliable. Experiments and engineer application indicate that the composite pavement has characters of low cost, simple maintenance, corrosion resistant and reusable, which has a great application prospect.
Usage of Steel Slag in Concrete as Coarse Aggregates
Authors: Feng Jing Jing , Wang Shan Shan , Wang Xiao Qing
Published: February 2014

In this paper, the mechanical properties and permeability of the concrete with steel slag coarse aggregates were investigated by comparing with the concrete with crushed limestone coarse aggregates. Results show that the concrete with steel slag aggregates shows similar strength with the concrete with crushed limestone aggregates at the age of 28 days, but it shows a little higher strength especially splitting tensile strength at the age of 90 days. Steel slag coarse aggregates tend to have limited influence on the elastic modulus and permeability of concrete. The results at different water to cement ratios are similar.
Effect of Surface Modification of Steel Fiber on Concrete Comprehensive Performance
Authors: Lv Jin , Liu Jian Zhong
Published: February 2014

In order to investigate the influence of surface modification on concrete comprehensive properties, special electrodeposition process is applied to modify the surface of steel fiber. Then the modified fiber and the non-modified fiber are added into concrete for comparisive test and analysis. The results illustrate that the bond strength between the modified fiber and concrete increases about 50% when competing with the non-modified group. Besides, the crack area of non-modified fiber group declines 46% and the toughening effect rises approximately 30%.
Model I Interlaminar Fracture Toughness of Carbon Fiber Reinforced Polymer Matrix Composites
Authors: Ji Ai Hong , Lu Min , Zha Meng , Dong Ben Zheng , Gao Li Hong , Dai Zhen Dong
Published: February 2014

Carbon fiber reinforced polymer matrix composites have been widely used in many fields. It is necessary to test the performance of interlaminar fracture toughness of composites and provide useful information for product development and material selection. In this paper polymer matrix films embedding with carbon fiber reinforced composite laminates curing at high temperature were used to study the performance of model I inter-laminar fracture toughness. Mode I interlaminar fracture toughness of composites reinforced by carbon fiber was measured according to ASTM D5528 standard. Three groups of samples cut into double cantilever beam (DCB) specimens were measured to compare their performance. The results showed that there was no fiber-bridging in multidirectional composite laminations. The delamination for all specimens extended slowly and stably. All of three groups of carbon fiber composites had strong model I interlaminar fracture toughness and high delamination tolerances. The sensitive to delamination is different because of different composition of these three carbon fiber reinforced composites.
Experimental Study of Compression and Carbonation in Concrete Subjected to Freeze-Thaw Environment
Authors: Wang Li Xue , Shan Xiao Ting , Zhang Yu Qing , Li Chun Sheng , Wang Zai Xing , Wang Xiu Hong
Published: February 2014

In order to research the changes of concrete properties in freeze-thaw environment, five concrete samples with water-cement ratio respectively equal to 0.60, 0.65, 0.70, 0.75 and 0.80 were tested in freeze-thaw environment according to GB/T50082-2009 concrete rapid freeze-thaw cycles test method. Five samples were carried out 0, 25, 50, 75, 100 times faster freeze-thaw cycles test. With the increasing number of freeze-thaw cycles, the concrete relative dynamic modulus of elasticity loss rises, the compressive strength drops, and the carbonation depth increases. The greater the water-cement ratio of concrete specimens with freeze-thaw cycles, the greater the degree of damage increases.
Effect of Coconut Coir Uniformity on Strength of Unfired Soil Lime Bricks
Authors: Purnomo Heru , Basmara Putra R.G. Raka , Syaifulloh R. Mochammad , Sulistyawan Iwan , Basoenondo Essy Arijoeni , Satim Madsuri
Published: February 2014

The paper discusses strength-time relation of unfired bricks reinforced with and without natural fibers. Untreated and treated coconut fibers with three different lengths (1 cm, 2.5 cm and 4 cm) were prepared for soil lime bricks reinforcements. The effects of 4% uniform 2.5 cm fiber reinforcement was compared to the effects of 4% non-uniform fiber reinforcement, which constitutes a fiber mix between 1/3 part each of 1 cm, 2.5 cm and 4 cm fiber length. Absorption of brick was also evaluated. Experimental investigations reveal that for all type of bricks, up to 90 days compressive strengths decrease a little but bending strengths rapidly decrease with time. The results show that unfired bricks added with uniform treated fiber resulted in better strength performances compared to those added with uniform untreated, non-uniform untreated and non-uniform treated fibers, and also to those without fibers.
Size Effect on Mechanical Properties of LVL
Authors: Lv Qing Fang , Qin Ji Hong , Zhu Ran
Published: February 2014

Laminated veneer lumber is taken as an object of study, and use LVL specimens of different sizes for compression test and tensile test. The goal of the experiment is to investigate the size effect on compressive strength and tensile strength as well as the influence of the secondary glued laminated face, which appears in the secondary molding processes. The results show that both compressive strength and tensile strength have the size effect apparently and the existence of the secondary glued laminated face lower the compressive strength of LVL specimens. Afterwards, the relationship between compressive strength and volume along with tensile strength and area are obtained by the test results.
Influence of the Organic and Mineral Additions in the Porosity of Lime Mortars
Authors: Martínez-Molina Wilfrido , Alonso-Guzmán Elia Mercedes , Chávez-García Hugo Luis , Arteaga-Arcos Juan Carlos , Torres-Acosta Andrés Antonio , Bedolla-Arroyo Juan Alberto , Gómez Cindy Lara , Acha Palomares Alfredo
Published: February 2014

The main objective was to determine the effect of additions of cactus mucilage (colloquially called cactus slime which on drying produces weddellite and whewellite crystals, calcium oxalates) and/or volcanic ash in masonry mortars made with lime, on the properties as mechanical resistance to compression, tension and bending, and the physical properties such as porosity which,leachates and capillary absorption. The Fagerlünd method was used, on lime mortar specimens according to ASTM standards. Four mortar mixtures were debeloped: with additions and without them, like sample witness. The lime is slaked handcrafted and comes from Piedras de Lumbre Quarry Stone, Zitacuaro, Michoacan, Mexico; the volcanic ash is a mud from Acambaro, Guanajuato, Mexico and the fine aggregate, sand, proceeds from Joyitas Quarry stone in Morelia, Michoacan, Mexico. A correlation of the mechanical properties of the four mortar mixes versus its degree of porosity was made. Porosity and absorption were affected by the mucilage and/or ashes addition increasing the mechanical strength; however this was not the aim of the research, since it is not intended that the mortars were rigid, it was intended that they were capable of absorbing deformations of the natural stone masonry. The addition of mucilage and/or ash, did reduce the percentage of total porosity, the cactus mucilage when dried formed crystals of whewellite and wheddellite which filled in the pores of the mortar matrix, and the ash, mud, as it is an igneous extrusive stone, in crypto crystallite form, it presented puzolan activity forming new minerals filling the matrix pores.
Experimental Research on the Impact Damage of Composite Laminates at Different Energies
Authors: Zhang A Ying , Lv Han Xiong , Zhang Ye , Zhang Dong Xing
Published: February 2014

The effects of the impact energy on the impact damage of CFRP laminates were studied in this paper. Impact tests for the CFRP laminates with the size of 600 mm×700 mm were subjected to different the impact energy levels from 5 J to 50 J. The matrix length was investigated according to different energy levels. The experimental results reveal that the crack length increases linearly with the increasing impact energy. The impact damage of CFRP laminates tends to be more severe as impact energy increases, and the impact area and crater depth increases with increasing impact energy. The surface of impact dent of specimen looks like W shape.
Model of Equal-Stressed Cylinder Based on the Mohr Failure Criterion
Authors: Andreev Vladimir I. , Chepurnenko Anton S. , Jazyev Batyr M.
Published: February 2014

In this article, an analytical dependence of distribution of elasticity modulus across the thickness of the cylinder loaded with internal pressure p, at which the equivalent stresses according the Mohr failure criterion are the same at all points. The problem is solved for the cases of plane strain state and plane stress state in the elastic formulation.
Effect of Consolidation with Alanine and Glutaraldehyde on the Properties of Fragile Wool Fabrics
Authors: Lin Zhen , Yu Ning , Li Ya Ping , Yang Ying Chao , Peng Zhi Qin , Wang Bing , Hu Zhi Wen
Published: February 2014

In this paper, alanine which was homologous with wool fibers and the crosslinker glutaraldehyde were used to consolidate fragile wool fabrics. As a bifunctional crosslinker, glutaraldehyde can react with amine groups both in wool and alanine. With glutaraldehyde crosslinking at different concentrations, the breaking strength, molecular structure and surface morphology of the wool were investigated. As a consequence, the consolidation with alanine and glutaraldehyde led to a positive effect on the mechanical properties of fragile wool fabrics, resulting in increased breaking strength. However, the results of SEM and FTIR showed that the consolidation had no obvious influence on the morphology and chemical structure of fragile wool fabrics.
The Influence of Temperature and Load on Dry Sliding Wear and Friction Property of Low Metallic Friction Material
Authors: Gui Liang Jin , Zhang Fang Yu , Fan Zi Jie , Chen Jin Lin
Published: February 2014

This study investigates the influence of temperature and load on the dry sliding property of interface between brake friction material with low metallic formulation and gray cast iron disc. Full factorial design was employed to conduct pin-on-disc wear tests to attain wear and friction response under external heating temperature and applied load ranging from 25-175°C and 50-500N(0.35-3.5MPa), respectively. The analysis of experiment results shows the effect of load on wear rate is almost linear. Wear rate exhibits an increase followed by decrease trend with applied load. Friction coefficient is positively affected by external heating temperature but almost independent of applied load. Quadratic regression is conducted to fit the influence of temperature and load on wear rate and friction coefficient and the result shows sound fitting effect.
Laboratory Investigation on Mechanical Behavior of Artificial Ice under Triaxial Compression
Authors: Xu Xiang Tian , Yuan Jun Hong , Bai Rui Qiang
Published: February 2014

A series of triaxial compression tests on an artificial ice with strain rate of 1.67×10-4/s at-6°C are carried out to investigate the mechanical behavior of ice. The influence of confining pressure on deformation and strength characteristics of ice is analyzed based on the experimental results. The results show that the stress-strain behavior and the strength of ice changes with increasing pressure in two distinct phases.
Influence of Vibration Stress Relief (VSR) on the Residual Stress and Microstructure in Welded Plate of DH36 Low Alloy High Strength Steel
Authors: Li Shu Qi , Fang Hong Yuan , Liu Xuesong
Published: February 2014

Welded components of DH36 low alloy high strength steel are widely used in offshore oil platforms and ships building. Stress reliving treatments to these welded components is of great importance. Vibration stress relief (VSR) method is an novel technology to release stress in welded components. In this study, 10×200×1000mm DH 36 steel plates were welded and then treated by VSR for about 1 hour. After the treatment, the residual stress was decreased by 29-72% at the welded toe, where the highest residual stress occurs. The metallographic microstructure of the joint was not changed by VSR. Investigation by transmission electron microscope (TEM) revealed that the amount of dislocations was increased at the welded toe. We hope this study can provide theoretical and practical fundamentals for widespread application of VSR on welded offshore engineering components.
Research on the Kinetics of Nylon Polymerized by Caprolactam Anionic Polymerization Using Adiabatic Method
Authors: Zhao Hong Kai , Wang Hong Li
Published: February 2014

Kinetic parameters were calculated based on the catalytic reaction systems of sodium caprolactam salt、N-75 biuret and at the temperature of 145 to 160 °C. The reaction order was approximately first order. The activation energy was between 73.2−77.1 kJ∙mol−1 and the pre-exponential factor was between 2.9×1011−3.6×1011 mol1−n∙s−1. The calculated reaction heat of 134.5−137.3 J∙g−1 was in consonance with the literature value of 138.6 J∙g−1. The adiabatic reaction kinetic model of caprolactam anion was constructed based on the existing research findings. The coincidence between the simulation results and the experimental data revealed that the model was reasonable and correct.
Research of Automatic and Security Ignition Device for Vanadium Iron Smelting Furnace
Authors: Yang Bo , Ding Wen Jie , Zhang Xiao Yu
Published: February 2014

In order to solve the problem of safe automation ignition process for vanadium iron smelting furnace, characteristics of ignition process, matching problem of device to process and its security design direction were analyzed. The requirements of process safety improvement were proposed. Key designs includes ignition furnace trolley positioning mechanism, swinging arm mechanism, the fire pole stretching mechanism, safety parclose, security monitoring devices, automated process of electronic ignition and automatic withdrawal of ignition guns. Application shows 13 safety advantages. In the research, process analysis is foundation, it includes steps refinement of manufacturing operations process, the order, the status, and problems that may occur in each step, this method for automation safe ignition process building could be a reference for similar research and development.
Band Selection for Hyperspectral Image Classification Based on Improved Particle Swarm Optimization Algorithm
Authors: Li Chen Ming , Wang Yan , Gao Hong Min , Zhang Li Li
Published: February 2014

Hyperspectral images have been widely used in earth observation. However, there are some problems such as huge amount of data and high correlation between bands. An application of particle swarm optimization algorithm based on B distance was proposed to band selection of hyperspectral images. First of all, bands are grouping by the correlation coefficient of the band and adjacent bands. B distance was used as separability criterion between classes and the fitness function comes into being. Finally, the classification results illustrate that the total classification accuracy of the proposed method is higher than the traditional method.
A Median Filtering Algorithm Based on Extremum Detection
Authors: Yan Liang , Yan Gao , Zhao Qin Xia
Published: February 2014

In this paper a improved algorithm of median filtering based on extremum detection is introduced. According to the deficiencies of the extreme median filtering method in the two stages of noise detection and noise filtering, Adds a false detection noise pixel gray value correction recovery process. Experimental results show that the algorithm in this paper are superior than traditional median filtering algorithm and some improved image filtering algorithm in noise removal and edge retention.
The Location Optimization of the Mission Space Based on the Stiffness of Robot
Authors: Zhang Yong Gui , Liu Wen Zhou , Gao Jin Gang , Liu Chen Rong
Published: February 2014

Based on the characteristic that the change of the space posture will be a great influence on the error in the operating end when the articulated robot is used for cutting,in the case of the robot structure and the the cutting load in the operating end certain, based on the stiffness model of the robot system ,the paper makes the deformation of the operating end of the robot as the objective function with the genetic algorithms to optimize the space position of the operational mission of the robot, finally verify it with examples.
A Hybrid Genetic Algorithm for Flexible Job-Shop Scheduling Problem
Authors: Wang Shuang Xi , Zhang Chao Yong , Jin Liang Liang
Published: February 2014

In this paper, a hybrid genetic algorithm is presented for the flexible job-shop scheduling problem with makespan criterion. A new machine assignment strategy is proposed to improve the initial population. A modified coding scheme is presented, and a population improvement strategy is performed when the best solution of the population did not improve during some generations. This hybrid algorithm is tested on a series of benchmarks instances. Experimental results show that this hybrid algorithm is efficient and competitive compared to some existing methods.
Dynamic Quality Prediction of Manufacturing Process Based on Extreme Learning Machine
Authors: Guo Jun , Li Yi Bing , Du Bai Gang
Published: February 2014

In many manufacturing processes, the abnormal changes of some key process parameters could result in various categories of faulty products. In this paper, a machine learning approach is developed for dynamic quality prediction of the manufacturing processes. In the proposed model, an extreme learning machine is developed for monitoring the manufacturing process and recognizing faulty quality categories of the products being produced. The proposed model is successfully applied to a japanning-line, which improves the product quality and saves manufacturing cost.
Fabricating Complexity - A Performance Based Methodology through Parametric Optimization
Authors: Yuan Phillip F , Xiao Tong , Devadass Pradeep
Published: February 2014

This paper discusses the integration of advanced computational design and digital fabrication methods through the project Light-Vault, which addresses the development and execution of complex designs resulting in a performance based approach through optimization. The project shows the development of a vault which is made through an assemblage of customized multiple components, which are parametrically controlled and evaluated with respect to light and weight. Due to influence of multiple fitness parameters a genetic algorithm is created and new methodology is developed for the evolution of the form. Algorithms are developed to ensure design thinking and fabrication procedures are simultaneously developed in a non-linear, parallel performance based process. This logical approach investigates the various possibilities and optimizes the development and fabrication of ruled surfaces in the interior volume of the component using digital methods and translation of the form into reality using industrial robots for fabrication. In parallel, the project explores the potential of robotic technology and introduces innovations of personalized robotic tools, in generating quick shaping volumes through this process. The developed methodology is tested in creating multiple units of the vault which are analyzed against various evaluation criteria. This cumulative cohesive process between advanced digital and physical computation methods is translated through a full-scale built pavilion.
Architecture Design of Building Integrated Solar Collector
Authors: Fu Yu , Chen Kai , Fu Fei Ying , Wang Xin Bin
Published: February 2014

Solar thermal collector converts solar radiation energy into useful thermal energy and transfers to a transport fluid flowing through the system. The collected energy can be used either direct to space or water heating equipment, or to a thermal storage for later use. Along with fast development, not only domestic hot water supply is needed, but also space heating and cooling are required. Also, limited roof space is another key barrier that should be considered. Furthermore, most of the building integration with solar collectors are mounted on the roof top by flat or tilt angle at present. It is considered to be a failure of low level architectural quality because the collector is used only for application and seems as an independent technical element of the building. With the consideration of the above, novel type of solar collector has been proposed to realize the utilization and offset the barriers. This novel solar collectors is especially suitable to supply domestic hot water, and combines with ASHP for multi-function, space heating and cooling as well as domestic hot water supply. Additionally, it is well integrated with high-rise residential buildings, which is good for aesthetic.
The Study on Roadway Layout in Coordination of Mining Coal Seams Base on Failure of Floor Strata
Authors: Zhang Yong , Zhang Chun Lei , Wei Chun Chen , Liu Ya Dong , Zhang Shi Qing , Zhao Jian Jian
Published: February 2014

In order to make sure the reasonable roadway layout in lower seam of close coal mining group coordination in Lijiahao coal mine, firstly, applying the theoretical analysis and geological radar detection to get the influence depth of mining from the up coal seam 2-2 to the floor is about 20m, the results show that the thickness of complete strata is about 15m, then determining to use the outward alternate entries in lower seam roadway by using theoretical analysis. At last, determining the distance of outward alternate entries is 12-14m by using FLAC3D numerical simulation software to simulate the change of stress and displacement in roof floor and two sides of roadway.
Study on Mechanical Properties of the Continuous U-Shaped Beam
Authors: Ye Xin , Zhang Jian , Ying Ma , Han Xiao Dong
Published: February 2014

Concrete U-shaped beam consists of driving deck and the two side beams. Concrete U-shaped beam is a kind of low height bridge. The application of concrete U-shaped beam is in highway and city bridge. It has a good potential application in low for medium span highway construction and for the height of concrete girder bridge construction. To the continuous U-shaped beam,based on the nonlinear finite element method, with the help of appropriatel element to simulate the concrete and steel, prestressed effect can be achieved in the body. At the same time, the cracking, yielding and crushing of concrete nonlinear change could be described through appropriate criteria. Combined with practical engineering calculation results shows that common reinforced steel is pressed n the early period, but fastened in the late period. The deflection of prestressed reinforcement is in linear elastic growth in the early period, growth is small, but deflection develops rapidly in the later period until structural failure. In this paper, a reliable calculation method is provided by researching the mechanical properties for prestressed concrete continuous U-shaped beam.
Damaged and Healthy Ignimbrites from the Surroundings of Morelia, Mexico; Uses for Restoration of the Colonial Inheritance
Authors: Martínez-Molina Wilfrido , Alonso-Guzmán Elia Mercedes , Chávez-García Hugo Luis , Arteaga-Arcos Juan Carlos , Torres-Acosta Andrés Antonio , Gómez Cindy Lara , Bedolla-Arroyo Juan Alberto , Velasco-Ávalos Fenando Augusto
Published: February 2014

The historic centre of Morelia, Mexico has over a thousand architectonic monuments catalogued. This allowed the city to become part of the list of world heritage site by UNESCO in the 90s of 20th century.
The location of Michoacan, the State in which Morelia is the capital, allowed it to have an abundance of acidic extrusive igneous rocks such as the ignimbrite quarry stones. The ignimbrites were carved into blocks to build vertical elements such as the walls and the foundations. Cases of carved and sculpted blocks were not designed to be coated with mortars, non sculpted ignimbrites were used in the case of buildings that were designed to carry coatings mortars and/or paintings; constructions in which the time to build was small, the money was scarce or the destination was not particularly important.
These monuments are colonial ones, the European brought building techniques in vogue in Europe; books written by Vitruvius, Palladio and Alberti were adapted to local conditions as ethnic and regional materials and costumes.
Ignimbrites, after exposed to the environment have begun to damage on the blocks posted as facades. In cases of severe exfoliation or acute devitrifying of the matrix in the ignimbrites, it is necessary to replace the damaged blocks by healthy rocks earned from the quarry stones of the surrounding places but it has not been able to find full match between rocks; sometimes do not match the resistance, porosity, durability, color or geographical location in the historical archives.
Results to date show matches and the discrepancies between the different quarry stones and uses that are targeting in heritage buildings.
The Constructive Measurements for Achieving Two-Direction Effects of Concrete Composited Slab
Authors: Xu Yin , Chen Lei
Published: February 2014

The article mainly introduces the constructive measurements in order to achieve the Two-direction effects of concrete composited slab based on the single-direction thin slab poured concrete, through the describing of the slab form, the method and principle of reinforced and the formation of composited slab, etc. Some primary problems about the composited slab have been solved by the constructive measurements. The achievement of above has a promotion for the development of the structural element.
Design Research of Novel Self-Propelled Air Railcar
Authors: Du Qiu Lei , Pan Li Ai
Published: February 2014

With the increase of people’s living quality, entertainment has become an essential way of life in modern life, and thus it has become an important and significant research goal to design safe, functional, practical and aesthetic entertainment facilities. In the paper, a novel self-propelled air railcar has been designed on the basis of the characteristics of existing ones. According to the working principle of railcar, the paper adopted ergonomics, to design the seat’s position and height reasonably to ensure passengers’ comfort; adopted innovation design method of bionics, where the appearance modeling design combined the moon, clouds and stars to comply with the times; used 3D software to model and render the model, and thus to express the artistic conception and reality sense of product, then the product will get recognition by consumers in both function and aesthetics.
The Study of Creative Green Fabric Design in Apparel
Authors: Zuo Yu Ting , Chen Ying
Published: February 2014

As with the development of the society, people are becoming more aware of the phrases like “low carbon”, “green” and “sustainable development in design and manufacturing”. Based on the notion of green, this article stresses that environmentally friendly materials should be applied to apparel design process. It illustrates the strategy of how to make apparel design more ecological, concerned with its method and materials. There are 2 basic ways: a scientific way and an artistic way. The article reflects on the low carbon appliance in the clothing industry, and shows specific ways of creating new materials and taking advantage of old fabrics, as sustainable development calls for new technologies to save energy, green materials applied to apparel design is an absolute trend for future society.
Effective Cost Estimation Model for Injection Mold Design Base on Time Schedule & Management System
Authors: Liu Wei , Zhou Xiong Hui , Niu Qiang
Published: February 2014

The cost estimation of mold design is a hard issue because of the complexity and variety of the products. We assume that the cost is largely decided by the time for design since labor salaries are increasingly important nowadays. In this paper, we propose a platform to count all the time consumed in all the design details, from which several statistics and analysis reports are made. Based on the data, the managers can acknowledge all the processes details in the design groups. Moreover, bottlenecks in design can be prevised and corresponding measures can be taken in advance. The existing data can also be borrowed for the later quotation for the similar designs. Certain companies have deployed our system and verify that it greatly help the cost estimation and control.
Research on Power-Grid Crisis Management and Online Intelligent Decision-Making System of Power-Grid Security
Authors: Li Shi Hua
Published: February 2014

Power grid crisis that have taken place at home and abroad warns the importance of power grid crisis management. This paper studies the development of the theory on power grid crisis management. Deficiency of the traditional human-intelligence decision-making rule indicates the necessity of research on Online Intelligent Decision-making System of Power-grid Security based on Data Mining. This paper also introduces the development of relevant theory and its concrete application. Research on the above will have profound significance for China to deal with power grid crisis.
Study on Harmonious Development of Design and Environment
Authors: Gu Yan
Published: February 2014

The design is a creative activity of mankind in order to meet the specific needs of their own; it is also the most basic activities of the human race survival and development. Advocates eco-design, green design, made of people, the environment, resources, balance and coordination, this is a new direction of development of the new century design art. In the long run, the people and the natural environment of interdependence, symbiotic, therefore we should be designed to protect the environment, to create a good and harmonious ecological environment. Green Design is a trend of the future social development, designers make unremitting efforts and pursuit of the direction, design and the harmonious development of the natural environment that we must seriously.
Dynamic Teaching on the Deflection Determining of Beams
Authors: Hsu Meng Hui , Weng Ting Sheng , Yang Der Ching
Published: February 2014

The object of this study is applying the mathematical concepts to help students for learning the deflection analysis of beams. We integrate the concepts and techniques of calculus, derivative, programming writing, and deflection of beam device manufacture to achieve the purpose of this work. The results show the computer dynamic teaching and simulation enable the students to know the representation of deflection analysis of beams, and realize the graphic representation of basic deflection concepts of beam. In facts, the dynamic teaching helps the students to effectively understand deflection analysis on beams with different loads.
On the Establishement of the Informational Educational Space in the Asia-Pasific Region
Authors: Reznik Boris L. , Gnitetskaya Tatyana N.
Published: February 2014

This article describes the principles of development of the informational educational environment of the Far Eastern Federal University and its structure. Along with a description of the experience in building of e-learning content based on LMS this article presents historical facts of forming the informational environment in the university. It was shown that a necessary condition for the formation of the international educational space in the Asia-Pacific region is not only determined by the presence of the university experience in the field of information technology and appropriate innovation level, but also by the presence of a well-developed sector of engineering and science education.