bluuebunny/crossref_metadata_2025 huggingface dataset:
Study on the Dynamic Interaction between Agricultural Tractor and Trailer during Braking Using Lagrange Equation
Authors: Nastasoiu Mircea , Ispas Nicolae
Published: October 2014

The paper elaborates a mathematical model in order to study the dynamics of tractor-trailer systems during braking. The braking dynamics is analyzed by considering two versions for the tractor’s braking system: 1) braking applied on the rear wheels and 2) braking applied on all four wheels. In both versions the trailer is braked on all wheels. This model enables us to determine the evolution of the following parameters: braking deceleration, braking forces, and force at the tractor-trailer hitch point. The authors present applications of the mathematical model elaborated on a tractor-trailer system used for transportation works.
Numerical Methods and Descriptive Geometry Methods for Unfoldings Determination
Authors: Cîrstoiu Carmen Adriana , Pohoata Alin , Petre Ivona Camelia , Popa Carmen
Published: October 2014

The calculation of the unfoldings surfaces has many practical applications, especially in the connection pipes of equal or different sizes. The work has the role of establishing a pipeline of an industrial installation, with a known configuration, composed by cylindrical, conical and prismatic surfaces. This paper, based on methods of descriptive geometry, gives all the necessary information to obtain the unfoldings and after that, by using numerical analysis, there are presented some algorithms used in developing the piece.
Generalization of Multispeed Gear Pitch Curves Design
Authors: Cristescu Ana , Cristescu Bogdan , Andrei Laurenţia
Published: October 2014

Defined by various geometries and kinematics characteristics, noncircular gears represent special mechanical systems able to produce nonuniform motion of the driven element. Multispeed gears are a less investigated category of noncircular gears, used to combine constant and variable speed, recommended for industrial applications that require uniform speeds for different parts of a cycle, with a smooth transition between the parts. Due to the motion requirements, the design of a multispeed gear train has as input data either the driven gear law of motion or the gear transmission ratio variation. This paper presents a specific original algorithm for the generalization of the multispeed gear pitch curve modeling, based on the definition of the gear instantaneous transmission ratio. The next step of the multispeed gear design, the teeth generation, accessible through solid modeling or analytical procedure, will be approached in a future study.
Technical Applications of the Descriptive Geometry and the Numerical Methods
Authors: Petre Ivona Camelia , Pohoata Alin , Popa Carmen , Cîrstoiu Carmen Adriana
Published: October 2014

Many problems of graphic building encountered in engineering are in fact problems of geometry. The continuous development of the modern technology and the appearance of the drawing and computing software solutions, allows the solving problems in several ways: using descriptive geometry or numerical methods. This paper proposes to establish a pipeline unfolding first using descriptive geometry then giving an easy programmable algorithm based on geometrical and numerical analysis considerations.
Mathematical Modeling of the Relationship between the Surface Roughness and the Tool-Chip Interface Temperature in Turning
Authors: Cîrstoiu Carmen Adriana , Popa Carmen , Despa Veronica
Published: October 2014

The present work aims to investigate the tool-chip interface temperature as functions of cutting parameters and also establishes an equation between the surface roughness and the temperature in the cutting area. Based on the experimental results, there were determined mathematical models, by using the factorial designs combined with the regression techniques.
Comparative In Vitro Study on MgCa Si MgCaSi Alloys, as Biodegradable Implants
Authors: Crimu Carmen , Munteanu Corneliu , Stanciu Sergiu , Istrate Bogdan , Earar Kamel
Published: October 2014

This paper represents a comparative study of several biodegradable alloys based on Mg, and respectively Mg-Ca and Mg-Ca-Si. The way these alloys were obtained and their comparative analysis are presented by means of results to the cytotoxicity tests, considering the biocompatibility and the degree of biodegradation of the studied alloys. Their production was undertaken in extreme lab conditions, in controlled atmosphere, in order to obtain precise compositions. Thus, we produced alloys from the Mg-Ca system, with the following Ca concentrations: 0.82%Ca, 0.84%Ca, 0.85%Ca, and for the Mg-Si-Ca system, we produced the alloy with Ca and Si in 0.4% concentration. For the cytotoxicity tests, undertaken within the Cellular Biology laboratory of the University of Medicine and Pharmacy Gr. T. Popa Iasi, we used a standard DMEM (Dulbeko Modified Eagle Medium) culture environment with 10% addition of fetal bovine serum and 4.5g/l glucose.
Seismic Performance and Assessment of Precast Beam-Column Corner Joint Subject to Reversible Lateral Cyclic Loading
Authors: Tukiar Mohd Azuan , Kay Dora Abd Ghani , Hamid Nor Hayati
Published: October 2014

A seismic performance of full-scale precast reinforced concrete beam-column corner joint with corbel was examined in the laboratory. The precast beam-column joint designed using BS8110:1:1997 was tested under lateral cyclic loading up to +1.5% drift. Displacement ductility of precast beam-column joint with corbel was determined. The visual observation showed that the damage occurred at the corbel of beam-column joint. Major cracks were also observed at the cast-in-place area above the joint area. In this paper, the damage state of the specimen is categorized in accordance to HAZUS®99 and the vulnerability of the specimen was assessed using fragility curve.
Response Surface Methodology Approach for Optimization of Biosorption Process for Removal of Binary Metals by Immobilized Saccharomyces cerevisiae
Authors: Mohamad Zulhelmi Mohd Zawawi , Rasyidah Alrozi , Faraziehan Senusi , Kamaruddin Mohamad Anuar
Published: October 2014

Biosorption process is considered as economical treatment to remove metal from the aqueous solution compared to other established methods. In this study, Saccharomyces cerevisiae was used as biosorbent and subject to immobilization process which consists of ethanol treatment for the removal of binary metals, lead (II) and nickel (II) from aqueous solution. Response surface methodology (RSM) was used to optimize effective parameters condition and the interaction of two or more parameters in order to obtain high removal of the binary metals. The parameters that have been studied were initial concentration of binary metals solution (10 - 60 mg/L), biosorbent dosage (0.2 - 1.0 g), pH (pH 2 - pH 6) and contact time (30 - 360 minutes) towards lead (II) and nickel (II) ions removal. Based on analysis of variance (ANOVA), biosorbent dosage, solution pH and contact time factor were found significant for both responses. Through optimization procedure, the optimum condition for lead (II) and nickel (II) ions removal were obtained at initial concentration of 10.0 mg/L, biosorbent dosage of 1.0 g, solution pH of pH 6, and contact time of 360.00 minutes, which resulted in 95.08 % and 21.09 % removal of lead (II) and nickel (II) ions respectively.
Aerosol Characterization over Penang, Malaysia Using Aerosol Robotic Network (AERONET)
Authors: Alias Azrul Nizam , Mat Jafri Mohd Zubir , Lim Hwee San , Saleh Nasirun Mohd , Chumiran Siti Husniah , Mohamad Anuar
Published: October 2014

Ground-based solar photometer measurements were utilized in the ambiance of Universiti Sains Malaysia (USM) Penang and Universiti Teknologi MARA (UiTM) Penang during September-November 2013 with a specific end goal to portray the characteristics of the local atmospheric environment. This both sites were established as being component of the collaborative work of the Seven South East Asian Studies (7SEAS) regional aerosol measurement project. This study concentrates on the Angstrom exponent (α), that is the gradient of the logarithm of the aerosol optical depth (AOD) against the logarithm of the wavelength as well as being commonly used to characterize the wavelength reliance of AOD and to furnish some critical data on the aerosol size distribution. In most situations fine mode aerosols appear to be the predominant category with marginally substantial contributions of coarse mode particles resulting from the particle growing, blending processes with other aerosol types, precipitation factors and relative distance to the seashore.
Buckling of Thin-Walled Cylindrical Shells of Desulphurizing Tower under Wind Loading
Authors: Pan Li Cheng , Wang Deng Feng
Published: October 2014

On the project background of the large-scale thin-walled cylindrical shells of a practical desulphurizing absorption tower, the investigations are conducted into the buckling mode and buckling capacity of the large-scale thin-walled cylindrical shells under wind loading by nonlinear finite element methods. In the buckling path, it firstly presents the buckling mode similar to that of the stocky cylinder under uniform external radial compression. In the post-buckling stage, the snap-through takes place, the buckling mode turns to being similar to the axial compressive buckling mode of the medium-height cylinder that horizontal buckles occur in the upper half of the front area. The buckling capacity of the cylindrical shells of desulphurizing tower is some more than the linear elastic buckling pressure of the cylinder under uniform radial pressure.
Numerical Simulation on Characteristics of Nitrate Nitrogen Leaching under Different Irrigation Levels
Authors: Ji Shu Hua , Deng Jiang Yang
Published: October 2014

The characteristics of nitrate nitrogen leaching in soil under different irrigation levels were studied by soil column simulation experiment with numerical simulation done using LEACHM model taking nitrate nitrogen leaching under different irrigation levels as the research background. In sandy soils, an irrigation amount of 300 mm would cause nitrate nitrogen to leach downward 75~150 cm, with a leaching amount of 10~30.7 kg/ha; and an irrigation amount of 700 mm would make nitrate nitrogen leach downward about 3.5 m, with a leaching amount of 98 kg/ha. Research data showed that the amount of nitrate nitrogen leaching was positively correlated with the irrigation intensity level, irrigation level directly determined the amount of nitrate nitrogen leaching, and influenced its leaching depth.
Study on Residual Strength of Corroded Pipes
Authors: Yang Dong Ping , Wang Ya Min , Cao Yi Fang , Long Feng Le , Niu Geng Qi
Published: October 2014

Corrosion is a very common defect for pipes under the sea after some service time, and it causes a deterioration of a pipe’s strength due to the reduction of the tube wall thickness. To provide a reliable assessment on the residual strength of a pipe after corrosion is very important in the safety evaluation of such pipes. This study presented both experimental and numerical investigations on the static strength of corroded pipes. Flexural test on a corroded pipe is carried out, and the tested results prove the decrease of the static strength for this corroded specimen. Furthermore, a finite element modeling method is proposed, and the reliability of this model is evaluated through the comparison with experimental results. Using this finite element model, effect of some corrosion sizes on the residual strength of the pipes has been analyzed and discussed.
Dielectric Relaxation Measurements in La1.94Ba0.06Mo2-yWyO9-δ (y=0, 1.0) Oxide-Ion Conductors
Authors: Li Dan , Wang Bo , Gong Pei , Li Jie , Li Xiang Hu
Published: October 2014

The influence of barium doping on the oxygen-ion diffusion and phase transition in the La2Mo2-yWyO9-δ (y=0, 1.0) oxide-ion conductors has been systematically investigated via dielectric techniques. In the Ba-doped La2Mo2O9 samples there are only two dielectric relaxation peaks Pd1 and Pd2, which are associated with the short-distance diffusion of oxygen vacancies. But in the Ba-doped La2MoWO9 members, three peaks are detected, including peak Pd1, Pd2, and peak Ph. The last is associated with the phase transition process from the static disordered state to the dynamic disordered state of oxygen ion/vacancy distribution.
Applied Technology in Simulation of Photovoltaic Cell Model Based on MATLAB/Simulink
Authors: Shi Shuo , Zhou Zhen Xiong
Published: October 2014

According to the simplified mathematical model of photovoltaic cell, a kind of simulation model of Photovoltaic cell based on output characteristics is established by using MATLAB/Simulink simulation software in this paper. By using this model, the output characteristics of different types of photovoltaic cells can be simulated in different light intensity and temperature. This simulation model has a simple model structure, and the parameters of model are easy to be adjusted. Output characteristics of the photovoltaic cell can be accurately reflected, and provide a reference for the research of PV system.
Applied Technology in Diaper-Based UTI Testing for Elder People by Using Nitrite Ion Selective Electrode
Authors: Feng Shi Lun , Dong Tao
Published: October 2014

Urinary tract infections (UTI) are common infection diseases in the hospitals, especially for the elder people. Detecting UTI for the elder people is difficult and time-consuming procedure. Since measuring nitrite directly in urine is often employed in the diagnosis of UTI, a nitrite ion selective electrode (ISE) was investigated in this study in order to detect UTI samples directly on used diapers of patients. With a commercial ISE sensor for nitrite, the detecting system was built to quickly and precisely quantify different concentrations of nitrite ions in both water solutions and real human urine samples. Good results were shown in the experiment that the nitrite can be precisely detected in the fresh urine by the ISE with the relations as Ε=224.7-21.259×Lg (C+13.476), where E is the electrode potential and C is the concentration of nitrite ions. Besides, the method of extracting urine samples from used diapers was also studied for further research. The investigation suggested that a sampling module for used diapers could be simply realized if necessary.
The Influence of Modified Polytetrafluoroethylene(PTFE) on the Properties of PA6/PTFE Blends
Authors: Liu Juan , Lin Heng , Yi Hong Ling , Wei Ting , Zheng Bai Cun
Published: October 2014

Polyamide, is engineering materials, has been widely used due to their high mechanical properties and good chemical stability although their moisture absorbtion can cause problems. In recent years, polyamides have been used as wear resistance materials due to their self-lubricating characteristics as well as good strength and stiffness [1]. However the high dry friction coefficient of polyamides restricts their application. Thus, modifying polyamides to improve the abrasion resistant property is desirable.
Synthesis and Photochromism Studies of 1-(2,5-Dimethyl-3-Thienyl)-2-[2-Methyl-5- Pyrenyl-3-Thienyl]Perfluorocyclopentene
Authors: Dong Xiao Rong , Wang Ren Jie , Pu Shou Zhi
Published: October 2014

A new unsymmetrical photochromic diarylethene1o, which contains condensed nucleus was synthesized. Its photochromic both in hexane solution and in PMMA film and kinetics experiment were investigated in detail. The result indicated that this diarylethene had reversible photochromism, changing the color from colorless to purple in hexane solution upon appropriate irradiation with 297 nm UV light, respectively. What’s more, The kinetic experiments showed that the cyclization and cycloreversion processes were zeroth and first order reaction, respectively. This new photochromic system also exhibited fluorescence switching in acetonitrile solution.
Synthesis and Properties Study of 1-(2,4-Dimethoxyl-5-Pyrimidinyl)-2-[2-Methyl-5-(3-Cyano)-3-Thienyl]Perfluorocyclopentene
Authors: Jiang Duo Hua , Liu Gang
Published: October 2014

A novel photochromic diarylethene bearing a pyrimidine moiety, 1-(2,4-dimethoxyl-5-pyrimidinyl)-2-[2-methyl-5-(3-cyano)-3-thieny-l] perfluorocyclopentene has been synthesized. Its properties, including photochromic behavior and fluorescent properties, have been investigated. The compound exhibited remarkable photochromism, changing from colorless to blue after irradiation with UV light. The results indicated that the pyrimidine moiety played a very important role during the process of photoisomerization reactions.
Simulation of InAIN/Si Single-Heterojunction Solar Cells Using wxAMPS
Authors: Huang Ying , Shen Xiao Ming , Wei Xiao Feng
Published: October 2014

In this paper, InAlN/Si single-heterojunction solar cells have been theoretically simulated based on wxAMPS software. The photovoltaic parameters, such as open circuit voltage, short circuit current, fill factor and conversion efficiency were investigated with changing the indium content and thickness of n-InAlN layer. Simulation results show that the optimum efficiency of InAlN/Si solar cells is 23.1% under AM 1.5G spectral illuminations, with the indium content and thickness of n-InAlN layer are 0.65 and 600nm, respectively. The simulation would contribute to design and fabricate high efficiency InAlN/Si solar cells in experiment.
Studies on Key Technology and Toughness of Super Sulfate Cement-Based Compound Materials
Authors: Yu Bao Ying , Wang Jun , Gao Yu Xin , Xiang Jia Yu
Published: October 2014

The traditional high toughness cementitous composites (HTCC) associated with great energy consumption and environmental pollution due mainly to the adding of Portland cement, which greatly limits the popularization and application of HTCC in general construction projects. Therefore the paper proposes a method of super sulfate cement-based composite materials by mixing with super sulfate cement (SSC), which was prepared with slag, industrial by-product gypsum and alkaline, manufactured sand, fly ash and polyvinyl alcohol (PVA) fiber. These super sulfate cement-based composite materials possess accompanied by the characteristic of multiple cracking with micron scale, approximate 20mm ultimate deflection and more than 13MPa ultimate flexural capacity.
Research on Carbonation of Recycled Aggregate Concrete Using Different Recycled Concrete Aggregates
Authors: Gao Yan Rong , Xia Qun , Feng Jin Cai
Published: October 2014

Experimental research on carbonation resistance of recycled aggregate concrete was conducted. Two kinds of recycled aggregates were considered, which were from road waste concrete blocks and waste concrete specimens in lab. The test results showed that the carbonation depth of RAC using the aggregates above increased by 11%, 17% at 28d compared with ordinary concrete. On the earning data of tests, the relationship between aggregate replacement rate and carbonation depth could be accounted as cubic parabola curve.
Research on Frost Resistance of Recycled High Performance Concrete
Authors: Zhu Ping Hua , Zhang Su Cheng , Xia Qun
Published: October 2014

Experimental research on the frost resistance of recycled high performance concrete (RHPC) was carried out, in which three kinds of replacements were considered including recycled coarse or fine aggregate to natural coarse or fine aggregate and together. The results showed that RHPC had the lower dynamic modulus and mass loss than natural aggregate concrete when the replacement of recycled coarse or fine aggregate ranged 30-70% or 10-50%. The best frost resistance of RHPC appeared to the simultaneous replacements of 50% and 10% for recycled coarse and fine aggregate.
Discussion the Rheological Properties of Asphalt Rubber
Authors: Meng Yong Jun , Jiang Yun Tian , Wang Yi Yuan , Shi Yong Qing , Huang Mou Fen
Published: October 2014

To test the effects of crumb rubber's mesh and parameters to rubber asphalt to improve the performance of asphalt, we use different mesh rubber powder and asphalt to prepare rubber asphalt in the laboratory, and do dynamic mechanical testing to rubber asphalt sample. We find that different mesh rubber powder have obviously different action to improve the performance of asphalt. Under the same conditions, in order to make better use of modified bitumen. We propose how to use modified asphalt prepared by different mesh rubber powder for different paving.
Fire Resistance Test of Concrete Composite Box Steel Girder Floor System
Authors: Lv Jun Li , Zhao Kao Zhong
Published: October 2014

The concrete composite box steel girder floor system is a new box-section ribbed hollow floor system. It is an integral structure integrated the girder and plates by the “composite box”, one of the precast composite members and the rear casting ribbed girder and has been widely used in the buildings with large span and heavy load. The article researches its whole process under the effects of the fire and the service load. In the whole process of test, the temperature field, vertical displacement, displacement within the plane, plate edge corner and other parameters of the different sections have been measured. The results show that: the concrete at the bottom plate of the composite box bottom plate quickly bursts off during the fire; later, the bottom plate of the composite box is out of operation; the floor structure becomes cross girder structure; as the temperature rises, after the floor system structure becomes the cross girder structure, the torque of the four-side ribbed girder of the floor system increases and the diagonal cracks occur on the four-side ribbed girder; as the temperature rises, there is large temperature gradient on the floor system ribbed girder along with the cross section height; the flexural deformation occurs to the floor system while the expanding deflection occurs in the plane; the maximum vertical displacement is achieved after the temperature rise stops; along with the drop of the temperature, the flexural deformation gradually recovers; after the tested temperature rise has been conducted for 292 minutes, the floor system still has good fire resistant capacity
Intrinsic Kinetics of Coking Crude Benzene Hydrodesulfurization on a Ti Modified Co-Mo-P/γ-Al2O3 Catalyst
Authors: Wang Jun Wen , Zhang Kan , Mao Xi Ying , Zhao Xue Hua , Ding Chuan Min
Published: October 2014

With different content of thiophene in coking crude benzene, the Orthogonal design experiments of thiophene hydrodesulfurization on a Ti modified Co-Mo-P/γ-Al2O3 catalyst were carried out in a micro-reactor under the reaction conditions of 2.3~2.7MPa,275~335°C, 0.5h-1LHSV and H2/Oil 600~750. The kinetic parameters and the intrinsic kinetics were acquired by 4-order Runge-Kutta method and the modified Simplex method. The power-law type kinetic model was established and consistent with the experiment data and highly acceptable and reliable.
Preparation and Characterization of Polymerized Rosin/Polyacrylates Composite Miniemulsions
Authors: Li Hong Qiang , Lai Xue Jun , Guo Jian Hua , Zeng Xing Rong
Published: October 2014

Polymerized rosin/polyacrylate composite miniemulsions were prepared by in-situ semi-continuous miniemulsion polymerization method with polymerized rosin as tackifying resin. The effect of polymerized rosin amount on the monomer conversion rate, the water absorption rate, adhesion properties including initial force, 180opeel strength and shear resistance of the composite latex films were studied, and the structure was also characterized by FTIR and DSC. The results showed that polymerized rosin played the role of inhibition and chain transfer agent in the polymerization process. Polymerized rosin was compatible well with polyacrylate. With the introduction of polymerized rosin, the water absorption rate and heat resistance of the composite latex films were not decreased. When polymerized rosin amount was 3%, the initial force, 180opeel strength and shear resistance of the composite latex films were 13 #, 200 N/m and 21 h, respectively.
Kinetic Investigation of Thermal Decomposition Reaction of Ethane-1,2-Diamine Copper(II) Chloride, C2H8N2CuCl2
Authors: Wen Pu Hong
Published: October 2014

:The thermal behavior and thermal decomposition kinetic parameters of ethane-1,2-diamine copper (II) chloride (EDCC) in a temperature-programmed mode have been investigated by mean of TG-DTG. There are four stages in the thermal decomposition process. The kinetic parameters of the apparent activation energyEa(130.2, 143.6 and 158.9 KJ·mol–1) and per-exponential factorA(1011.80, 1012.18and 1011.83s–1) in II, III and IV stages were obtained from analysis of the TG-DTG curves by Kissinger method. The values ofEaindicated that the difficulty coefficient of pyrolysis in II, III and IV stages was increased in the order: II < III < IV. The values of the entropy of activation ΔS≠, enthalpy of activation ΔH≠and free energy of activation ΔG≠of the reaction were estimated.
Preparation of Polyethylene with Vanadium/Titanium Bi-Metal Ziegler-Natta Catalysts
Authors: Jiang Tao , Gao Xiang Lu
Published: October 2014

The catalyst with magnesium chloride supported vanadium/titanium bimetallic Ziegler-Natta catalysts has been prepared. The effects of V/Ti molar ratio and dosage of α-olefin on catalytic activity of ethylene polymerization were investigated. Gel permeation chromatography (GPC),13C-NMR spectra and differential scanning calorimetry (DSC) analysis were performed to characterize the polymers. The results indicated that the bimetallic catalyst system produced PE with broad and bimodal MWD.
Desulfurization of Model Gasoline by Adsorption Process with Ruthenium Ion Modified Y-Zeolites
Authors: Li Ting Ting , Cao Fei , Xue Mei
Published: October 2014

Desulfurization of thiophene from model gasoline was carried out by using large charge number metal (Bi, Sb, Zr and Ru) ion modified NH4Y-zeolite by batch method. The sulfur uptake increased in the order of HY (0.85 mg/g) < BiY-1 (1.06 mg/g) < SbY-1(1.24 mg/g) < ZrY-1 (1.25 mg/g) < RuY-1 (1.35 mg/g). Sulfur uptake was influenced by Ru contentof RuY, which increased in the order of RuY-0.25 (1.11mg/g) < RuY-1 (1.41mg/g) < RuY-0.5 (1.68 mg/g). Sulfur removal was influenced by aromatics of model gasoline, i.e., sulfur removal of RuY-0.5 (42%) showed higher selectivity for thiophene than CeY-1 (24%) ones when model gasoline with toluene.
Morphology, Mechanical and Thermal Properties of the Blends of Poly(Trimethylene Terephthalate)/Acrylonitrile-Styrene-Acrylic Copolymer
Authors: Lv Shu Fang , Niu Shi Jie , Liu Ying Bin , Run Ming Tao
Published: October 2014

Poly (trimethylene terephthalate)/acrylonitrile-styrene-acrylic copolymer blends were prepared and their morphology, thermal aging and mechanical properties were investigated by using the polarized optical microscopy, universal material testing machine and color-difference meter, repectively. The results suggest that ASA and PTT are partially miscible in the blends, and when TPEE content is 50%, a bi-continuous phases form in the blend. The PTT’s spherulites in the blends become smaller and even microcrystallites with increasing ASA content. ASA component has good effect on toughen PTT by increasing blends’ impact strength but depresses the tensile strength of the blends. ASA has no influence on the thermal aging properties of PTT, and PTT/ASA blend has better thermal aging resistance than that of PTT/ABS blend.
Design and Development of Crystal Eco-Brick Shell
Authors: Yao Hang , Zhang Yuan , Xie Wei Xiao , Zhang Jian Lin , Yang Xiao Hong
Published: October 2014

Crystal Eco-brick is a new ecological generality of decoration material. The shell is a key component of indoor stereo virescence concept combined with interior decoration materials. After crystal Eco-brick shell design had been finished, related technology research as well as development for the first, the second and third generations productions were done. The third generation of Crystal Eco-brick shell reached excellent characters such as strong universality, simple operation, high strength, more suitable for indoor afforestation.
Study on Characteristics of Lactobacillus rhamnosus on Lactic Acid Fermentation with Different Substrates
Authors: Li Ning , Lü Yu Cai , Gong Da Chun
Published: October 2014

In order to investigate characteristics of Lactobacillus rhamnosus on lactic acid fermentation using different substrate, in this study, saccharification liquid obtained during wet oxidation blasting of straw were used as substrate, conversion reducing sugar to lactate by Lactobacillus rhamnosus was studied and compared with fermentation using glucose as substrate, The results indicated that Lactobacillus rhamnosus could utilize reducing sugar in saccharification liquid obtained during wet oxidation blasting of straw effectively. The highest efficiency of reducing sugar conversion (92.45%) appeared when concentration of reducing sugar as substrate was 20mg/mL; conversion rate of reducing sugar decreased as increasing of sugar concentration. Fermentation of saccharification liquid obtained during wet oxidation blasting of straw to lactic acid by Lactobacillus rhamnosus had optimal effects in the first 48h of incubation.
The Study of Denitrification Rate and N2O Release Rate in Shuangtaizi Estuary Wetland
Authors: Liu Xiao Sha , Bai Jie , Sun Jia Jun , Hou Rui , Zhao Yang Guo
Published: October 2014

The denitrification and its influencing factors were studied in reed, suaeda heteroptera and reed degraded wetland. PDR were similar in reed and suaeda heteroptera wetland; primary influencing factors were temperature, nitrate and TOC. pN2O, N2O/ (N2O + N2) were less in reed wetland than that in suaeda heteroptera wetland; significant influencing factor was ORP. Compared with the reed wetland, the PDR in reed degraded wetland had significantly reduced, whose limiting factor was TOC concentration in soil; the ration of N2O/ (N2O + N2) had increased and the pN2O had no obvious change in reed degraded wetland.
Research on the Mechanism of Sulfate Pollution of Groundwater in Jiaozuo Area
Authors: Man Kai , Ma Zhen Min , Xu Xiu Jin
Published: October 2014

Based on the distribution of sulfate in groundwater of Jiaozuo Area, pollution sources can influence the groundwater were analyzed. The results show that sulfate pollution in groundwater of Jiaozuo Area is serious; industrial pollution is the main reason for sulfate pollution in groundwater; sewage irrigation and overcommitting fertilizers are the important reason for the sulfate pollution in groundwater; mine drainage and the overexploitation of groundwater can accelerate the sulfate pollution in groundwater.
The Research on Anaerobic Bio-Hydrogen Production Using UASB Reactor from Molasses Wastewater
Authors: Lei Rui Ying , Wang Yue , Liang Qian Wei , Li Yong Feng
Published: October 2014

The principle and engineering control parameters of anaerobic bio-hydrogen in an up-flow anaerobic sludge blanket reactor are introduced, especially on the research situation and development trend of this technology. Many theoretical achievements of bio-hydrogen production using UASB reactor have been made, but the large scale industrialization of this technology has not been realized because there are still some difficulties in start-up and operation of the UASB reactor. Finally, some strategies and suggestions are proposed as guidance for further research.
Comparison of THMs Formation between Chlorination and Chloramination of Simulated Water with TiO2 and UV Pretreatment
Authors: Meng Jing , Zhu Zhi Liang , Qiu Yan Ling
Published: October 2014

In this study, the formation of trihalomethanes (THMs) during chlorination or chloramination after different pretreatments including single nanoTiO2 adsorption, single UV treatment or the combination of UV/TiO2 under the same pH, TiO2 dose and humic acid concentrations were evaluated. Effect of different pretreatments on the reduction of non-purgeable organic carbon (NPOC) and UV254 before the disinfection was investigated. The result showed that single UV and single TiO2 adsorption to reduce NPOC and UV254 values is negligible, and the combination of UV/TiO2 removed 45% of NPOC and 72% of UV254 after 480min reaction. For the formation of the THMs during the followed chlorination, it was found that the combination pretreatment of UV/TiO2 resulted in a parabolic trend for the formation of the THMs while single UV pretreatment increased steadily and single TiO2 pretreatment kept stable. Chlorination generated higher concentrations of total THMs than chloramination. The total THMs produced by chloramination only represented <5% of that of chlorination.
Progress on the Precious Metals Used in High-Temperature Protective Coatings
Authors: Wei Yan , Chen Li , Cai Hong Zhong , Qi Xiao Hong , Zheng Xu , Hu Chang Yi
Published: October 2014

Nickel-based super alloy, niobium alloy, refractory metal and carbon fiber reinforced composite are the most common structural materials used in aviation and spaceflight fields. Reduced oxidation and corrosion resistance at high temperature are limiting factors to the application of theses materials. Adapted protective coatings such as pure precious metal coatings, precious metal alloy and precious metal composite coatings can be applied on the surface of theses materials. New advances of oxidation protective coating in recent years are reviewed in this paper, combined with some research on the preparation of iridium
Selective Removal of As(V) from Aqueous Solutions Using Magnetic As(V)-Imprinted Polymers with Combination of Two Functional Monomers
Authors: Pan Mao Hua , Zhu Zhi Liang , Qiu Yan Ling
Published: October 2014

A novel magnetic arsenate imprinted polymer (MIIP) was synthesized through a surface imprinting technique with combined utilization of two different amine containing functional monomers (allylamine and 3-aminopropyl triethoxysilane) and tetraethyl orthosilicate modified magnetic Fe3O4 nanoparticles as a support. The synthesized MIIP was used to investigate the selective adsorption performance for arsenate. The results showed that this MIIP has a high selective As (V) adsorption efficiency and easy for the separation of the adsorbent from aqueous solutions. In the presence of competing ions including Ca2+, Mg2+, Cd2+, Zn2+, Cu2+, Mn2+, Ni2+ and As (III), the synthesized MIIP can selectively and efficiently adsorb As (V) species. Compared with the non-imprinted magnetic polymer (NIP), it was found that this MIIP showed high selectivity coefficients for As (V)/Ca2+, As (V)/Mg2+, As (V)/Cd2+, As (V)/Zn2+, As (V)/Cu2+, As (V)/Mn2+, As (V)/Ni2+, and As (V)/As (III) with 4.46, 5.60, 5.45,8.48,13.5,15.9,38.7, and 102.9, respectively. Langmuir model was applied to fit the adsorption isotherm data, and the maximum adsorption capacity for As (V) was calculated as 7.53mg/g.
Electrodeposition of Porous Polyaniline Coating on an Etching Stainless Steel Wire as a Fiber for Solid-Phase Microextraction of Triclosan and Chlorophenols in Water Samples
Authors: Liu Li , Liu Hai Xia , Li Yi , Du Xin Zhen
Published: October 2014

A novel polyaniline (PANI) coating doped with perchlorate ions was prepared on a stainless steel (SS) wire by a three-electrode system. Before electrodeposition, the SS wire was etched by hydrofluoric acid to enhance its surface roughness. The prepared PANI-coated fiber was used for solid-phase microextraction (SPME) of 2-chlorophenol (2-CP), 2,4-dichlorophenol (2,4-DCP) and triclosan (TCS) in water samples followed by high-performance chromatography with UV detection (HPLC-UV). The extraction procedure was optimized. The proposed SPME-HPLC-UV method provided a wide linear range. The limits of detection were 0.006 ng/mL for 2-CP, 0.005 ng/mL for 2,4-DCP and 0.04 ng/mL for TCS, respectively. It was successfully applied to the analysis of spiked surface water samples with the recoveries from 99.6% to 109%.
High Effective Utilization of Metallurgical Solid Waste in Pelletizing Process
Authors: He Hong Sheng , Lv Xiao Fang , Huang Li Ying
Published: October 2014

In this study, the fundamental properties of metallurgical solid waste were investigated firstly. Based on which, the experiments of metallurgical solid waste adding in pelletizing process were studied. The results showed that it is possible to add metallurgical solid waste in pelletizing process. But in order to meet the blast furnace production requirements, the ratio of metallurgical solid waste should not be more than 15%, and the roast temperature should be above 1250°C. This work can provide theoretical and technical basis for using metallurgical solid waste in pelletizing process.
Catalytic Oxidation Removal of HCN in Tail Gas
Authors: Jia Rui , Ning Ping , Wang Xue Qian , Wang Lang Lang , Shi Yong , Guo Xiao Long
Published: October 2014

High activity catalyst for HCN removal were prepared by immobilizing Cu2+on γ-Al2O3. The catalyst showed great activity from 150°C to 250°C. The removal efficiency of HCN were above 98%. Based on the experimental phenomena, it can be assumed that the rate controlling step of the catalytic reaction process was the generation of HNCO by HCN and O2. A prediction model consist of HCN conversion, HCN flow rate, catalyst dosage was derived by combining the Langmuir adsorption isotherm. The experimental data fitted with the prediction model very well and the model may be a worthy reference for the catalytic oxidation process of HCN.
Application of Machine Vision Coupling Pattern Matching Technology in Environment Design
Authors: Hu Jing
Published: October 2014

In some dangerous work environments unsuitable for manual operation or the occasions difficult to meet requirements of artificial vision, common machine vision is replaced for artificial vision. Machine vision can easily realize information integration. It is a basic technology of computer integrated manufacturing. To provide reference for continuously breaking through traditional environment design idea, this paper deeply studies machine vision technology and pattern matching algorithm, appropriately couples the two technologies and applies machine vision coupling matching technology in environment design. The results show the two technologies can be appropriately coupled and applied in environment design, introduce formation in space environment and make graphs, images and texts integrate with space environment.
Predicting Carcinogenicity of Anilines by Quantitative Structure-Toxicity Relationship
Authors: Zhou Zhi Xiang , Liu Yang Hua , Zhang Xiao Long
Published: October 2014

Carcinogenicity is an important toxicological endpoint which poses a great concern being the major determinants of cancers and tumours. Anilines possess such toxic properties as they can form various electrophilic intermediates and adducts with biological systems. In the present work, the molecular descriptors of anilines have been calculated with semi-empirical AM1 and E-dragon methods, and a quantitative structure–toxicity relationships (QSTR) model for carcinogenic potency (pTD50) model of anilines was developed with multiple linear regression (MLR) analysis. The validation results through the test set indicate that the proposed model is robust and satisfactory. The QSTR study suggests that the molecular structure and the electronegativity of chemicals are closely related to the Carcinogenicity.
Stability Analysis of Drill Rods as Shells in the Gas Stream
Authors: Kudaibergenov Askhat , Kudaibergenov Askar , Khajiyeva Lelya
Published: October 2014

In the paper steadiness of the compressed and twisted drill rod is examined. The rod is presented in the form of a circular cylindrical shell, which is circulated from the outer side by a supersonic stream of gas. The rod is affected by the uniformly distributed on its length axial force and the torque. The problem of stability is solved by means of reviewing of a small deviation from the periodic solution of the problem. Boundaries of instability zones of the mechanical system are defined with application of the method of harmonic balance.
High Temperature Oxidation Studies of Al Coating Deposited by Magnetron Sputtering
Authors: Lou Jin , Ruan Cheng Xiang
Published: October 2014

Al coating was deposited on 0Cr18Ni10Ti steel by magnetron sputtering, and then diffusing annealing at 950°C for 2h. The isothermal oxidation behaviors of the Al coating and 0Cr18Ni10Ti steel were tested at 900 °C for 24 h and 800 °C for 24 h using Thermo gravimetric analyzer. The morphology was studied by SEM, the phase composition was characterized by EDS. The result of isothermal oxidation test showed that isothermal oxidation resistance of Al coated steel is better than 0Cr18Ni10Ti steel at 900 °Cand 800 °C, due to continuous and compact Al2O3scales. Al clusters of particles appears on Al coated steel during deposition. The larger particles peeling off was observed at 900°C after 18h, due to thermal and growth stresses, while no spallation appeared at 800°C for 24h.
Research of Drug Name Entity Recognition Based on Constructed Dictionary and Conditional Random Field
Authors: Zhu Xun , Deng Hong Tao
Published: October 2014

Drug name entity recognition (NER) is an important foundation of information extraction, automatic question answering, machine translation and information retrieval and other natural language processing technology based on the medical literature. This paper presents a method combined a constructed dictionary and conditional random field model to identify the drug entity. The proposed method has good performance in DDIExtraction 2013 evaluation corpus. //
Sintering of Fine Grained Polycrystalline Cubic Boron Nitride Compacts without Binder
Authors: Liu Guo Duan , Kou Zi Li , Yan Xiao Zhi , Lei Li , He Duan Wei
Published: October 2014

Cubic boron nitride (cBN) is a excellent super hard materials with superior mechanical properties that has been widely used in different industrial applications. Conventional cBN was sintered with binder in the cBN powder, and the binder affect the mechanical properties of cBN. Here we report that we sinter the polycrystalline cBN on WC-16wt%Co substrates without any sintering agent at the pressure 5.5 GPa and temperatures of 1300-1600°C for 10 min. In the sintering, we used 1-2μm fine grained cBN powder as the starting materials, also, liquid substance infiltrated from the substrates and occurred chemical reactions with cBN powder. Reaction contents were investigated at different temperatures according to X-ray diffraction (XRD). Plenty of direct BN-BN bonding was formed in the scanning electron microscopy ( SEM) observation.The hardness of best samples reach 38.5 GPa under the loading force of 5 kg, which have high hardness for the formation of direct BN-BN fine grains in the sample. .
Study of Process of Hot-Dipped Galfan Coating on Q235 Structural Steel
Authors: Du An , Ma Rui Na , Fan Yong Zhe , Zheng Peng , Cao Xiao Ming
Published: October 2014

A different production method including a formulated flux has been devised to hot-dip Q235 Galfan alloy coating on structural steel. The microstructure and composition of the Galfan coatings, applied by the hot dip process, was performed using SEM and EDS technology to evaluate the coating thickness and its relationship with technological parameters. The experimental results showed that the coating of specimen has eutectic crystal shape and its thickness is thinner than Zinc coatings’ scale. Moreover, the Galfan plating does not grow with the extension of time for immersion. The temperature of immersion and the extraction speed will affect the coating thickness too.
Influence of pH on Electroless Ni-P-γAl2O3 Composite Plating on AZ91D Magnesium Alloy by Ultrasonic Wave
Authors: Fan Yong Zhe , Qiu Jin , Ma Rui Na
Published: October 2014

A dense electroless plating was obtained through the process of chemical Ni-P-γAl2O3composite plating by ultrasonic wave. The influence of pH on deposition rate, microstructure, coating thickness and microhardness of the composite plating was studied. The deposition rates of the coating is the fastest at pH value of 7,which is 17.9×10-5g/cm2/min.The microstructure of the Ni-P-γAl2O3coatings were analyzed by scanning electron microscopy (SEM). The results indicate that the influence of pH value on magnesium alloy is very large.And the composite coating obtained at pH value of 7 possesses optimal integrated properties, which shows uniform and compact. The plating obtained at pH value of 7 is the thicknest.
Reliability of Masonry Structures According to the Contemporary Computational Procedures
Authors: Vejvara Ludek , Pasek Jan
Published: October 2014

Masonry structures are widely spread type of constructions with long history not only in Central Europe. Current modern masonry is however quite different from traditional masonry made from stone or bricks. Development of new modern technologies of construction and materials as well as the societal and environmental requirements have influenced masonry in last decades to such extend that nowadays the masonry structures are made from very sophisticated masonry elements of wide range of characteristics. This naturally leads to changes in proposed procedures which have to take into account significantly different parameters both of the masonry as well as the material and also the masonry structures as the whole in interaction with other parts of the buildings.
Galvanised Sheets as Building Material
Authors: Adamus Janina , Gierzyńska-Dolna Monika , Gorecki Wilhelm , Lacki Piotr
Published: October 2014

Civil engineering uses steel as one of the basic structural materials. Sheets play an important role among the steel products. Although steel sheets are relatively cheap and have good mechanical and technological properties, low resistance against corrosion poses a fundamental weakness. A solution to this problem is the use of galvanised or organic-coated steel sheets. Galvanising can be carried out by hot dipping (single structural parts) or continuous galvanising: electrolytic and hot-dip galvanising (sheets and strips or long products, such as: wires or pipes).In the paper steel sheets used in the civil engineering as structural parts or wall and roof cladding are discussed. A special attention is paid to corrosion resistance of the steel sheets. Some results of corrosion tests is presented. The tests were aimed at determination the corrosion resistance of hot-dip and electrolytic galvanised sheets. The influence of the galvanising technology and the relationship between the degree of material deformation and susceptibility to corrosion are given. Coating thickness and kind of the applied galvanising technology is pointed as the key factors affecting the corrosion resistance of galvanised sheets. It is highlighted that during the forming process of galvanised sheets (bending, sheet-metal forming) the zinc coating deforms more than the steel base, so its thickness decreases, and therefore the corrosion resistance of the final product decreases, too.
Comparative Analysis of the Distribution of Effective Stress in Mooney and Zahorski Materials Using ADINA Software
Authors: Major Maciej , Major Izabela
Published: October 2014

Adina is a software that supports analysis of both pre-defined models and analysis of the models defined independently. The paper presents a comparative analysis of the distribution of effective stress in simple elastic structures made of incompressible hyperelastic Mooney - Rivlin and Zahorski materials. To carry out numerical calculations for the Zahorski material it was necessary to make modifications of 2D and 3D libraries in the ADINA software which has been completed in the authorial process. Conclusions are presented in the conclusions at the end of the study.
Propagation of the Surface of a Strong Discontinuity in the Hyperelastic Materials
Authors: Major Maciej , Major Izabela , Różycka Judyta
Published: October 2014

In a series of dynamic issues of continuum, a special role play surfaces of discontinuity. These surfaces are divided two areas of the body that are characterized by significantly different solutions of dynamics equations. All disturbances propagate with finite speed in the continuum. The purpose of this paper is to discuss the propagation of surface discontinuities in isotropic material with the hyperelastic potential Blatz-Ko. These disorder, according to the assumptions is the shock wave, or a wave of strong discontinuities.