bluuebunny/crossref_metadata_2025 huggingface dataset:
Mechanical Properties Analysis of CFRP Pre-Stressed Section Continuous Thin-Walled Box Girder Bridge Models 22
Authors: Wang Xin Zhong , Li Chuan Xi
Published: August 2014

An externally pre-stressed continuous box girder bridge model is designed according to loading features of the continuous beam. The CFRP bars and steel strands are used to make two models for externally pre-stressed reinforcements Analysis of the two models under three different load stiffness and loss of prestress, through calculation and analysis, found that two kinds of prestressed concrete material model under three load deflection basic same, also almost the same change trend, prestressed RMS model than model 1, 2 but with the increase of load model 2 prestress loss is big. Analysis results of CFRP materials and application to provide the reference in the bridge.
Study on Cracking Resistance of Concrete Reinforced with Rib Stiffened Steel Plates
Authors: Wang Xiao Dong , Zhang Xie Dong , Wang Jin Zhi , Zhou Zhi Xiang
Published: August 2014

Aimed at the question of excessive tension stress in local area in concrete structure, a ribbed steel plate-concrete composite structure (RSPC) which can improve crack resistance and prevent crack developing was proposed. Four specimens of RSPC flexural members were designed to be compared with common concrete flexural members. The test results show that RSPC, which cracks appeared in upper limb, have much more crack resistance ability than common concrete flexural members. According to energy absorption principle in failure process of composite materials, the crack mechanism of RSPC composite structure was studied.
Construction Technology for Deep Foundation Pit Support in Mining Area
Authors: Teng Bing
Published: August 2014

With economic development, the massing of buildings in the mining area is increasing. The larger and deeper foundations will come forth. The safety of excavation support, adjacent building put forward higher requirements. Summing up the experiences of deep foundation pit support in mining area, this article expounds the mining area excavation support structure, retaining pile, neighboring buildings and foundation as a whole process which is simulation of excavation and supporting.
Perceived Roughness of Material Surfaces
Authors: Liu Jun , Cai Xiao Xu , Dong Jun Yu , Ning Xiao Qian
Published: August 2014

Roughness is an important perceptual characteristic of material surfaces. This work investigated a derived model for evaluating surface roughness in accordance with human visual perception. This was accomplished with the help of extensive psychophysical experiments. Surface textures resembling natural materials were generated with different roughness. Subjects rated the surface textures on 5-point Likert scales based on visual perception of surface roughness. We trained a general model for mapping features of surface images to perceptual scales of roughness. It can be observed that the roughness obtained in this way is in good agreement with that perceived by human. Thus, given a material surface, roughness can be estimated accurately.
The Co-Existence and Openness of Green Building Design from the Perspective of Complex Science
Authors: Chi Qing  Na
Published: August 2014

The efficacy of green building system depends on the scientific development and achievement. This paper will explore the innovation and revolution of green building design methods with the theories of complex giant system, synergetics and evolutionary computation from the perspective of complex science. The author hopes we can improve and adjust the relationship between human beings and the nature by the application of complex science and translation in green building.
Comparative Analysis of Wind Speed in Ventilation Hole Simulated by VOF and Euler Model
Authors: Zhang Hong Qing , Zhang Xian Tang , Lou Yi Long , Xing Wei Ping
Published: August 2014

In order to analysis the applicability of VOF and Euler models to simulate water-air two-phase flow, VOF model and Euler model, respectively combining turbulent model, were used to simulate wind speed in ventilation hole of working gate in a hydropower station spillway tunnel with high head and large discharge in China. The results show that the dragging force simulated by Euler model is much more effective than that simulated by VOF model, causing significant increase of airflow in ventilation hole. It is obviously that wind speed simulated by Euler model is more close to the measured one, which may also provide evidence for design of ventilation hole. So Euler model is a better method to simulate the characteristic of aerated flow than VOF model. Meanwhile, the maximum wind speed occur near the inlet of ventilation hole, and the maximum value of wind speed is close to 120 m/s, which can cause loud noise. And wind speed distribution on the inlet section and outlet section of ventilation hole is respectively the most non-uniform and uniform. The conclusions obtained can improve the design of ventilation hole.
Application of Numerical Simulation Technology in the Large Space Air-Conditioned Buildings Air-Conditioned Buildings
Authors: Li Jian Wei , Feng Zeng Xi
Published: August 2014

This paper takes the large space air-conditioned buildings air-conditioned buildings as research subjects and sets numerical conditions of large space air-conditioned buildings prototype to conduct a simulation study by means of numerical simulation.Numerical and experimental results show that the standard k-εturbulence model can be used to describe the characteristics of the large space air-conditioned buildings building;the experimental results of a typical location room temperature basically consistent with the numerical results of the prototype and enlarged model.Results of this study will provide a useful reference for the researches of large space air-conditioned buildings air-conditioned building.
Research on Innovation of Urban Sewage Treatment System Based on Perspective of Energy Conversion
Authors: Zhang Feng Fan , Wen Shuo , Ji Tong
Published: August 2014

As the deepening contradictions between the urban water and water shortages, Urban requires urban sewage treatment systems to improve the efficiency of treatment; it requires the level of the assessment of urban sewage treatment system higher. We commonly used in urban sewage treatment system evaluation model for the Analytical Hierarchy Process model and input-output model, respectively, from two different perspectives to assess the urban sewage treatment system. However, both of two models are flawed. This paper attempts to examine the lack of two assessment models, and make two the models to be amended by the perspective of energy conversion.
Blended Polypropylene Fiber of Various MFR via a Melt-Blowing Device for Oil Spill Cleanup
Authors: Meng Xiao Hua , Wu Hui Hui , Zeng Yong Chun
Published: August 2014

PP fibers are commonly used for oil spill cleanup. In order to improve the oil-sorption capacity of the PP fibers, the blended PP fiber of various MFR and unblended PP fiber of certain MFR were fabricated as sorbents by a swirl die melt-blowing device in this study. The material properties of the PP fibers were examined by scanning electron microscopy and contact-angle measurement. The oil sorption and sorption-desorption tests show that the blended PP fibers have a much higher oil-sorption capacity than the unblended PP fibers and an excellent reusability.
Study on Gel Time for Electrorheological Materials Applied to ER Automatic Clutch
Authors: Wang Yun Cheng , Wang Meng , Wang Jian Hua
Published: August 2014

This paper made a study of preparation of the electrorheological materials applied to ER clutch. Several experiments were made to research the influence of the solvent, deionized water, dropping rate, and the inhibitor on the gel time,and different gel time under different experimental conditions were obtained. The experimental results provided a reference of experimental conditions for preparing electrorheological materials applied to ER clutch. The conclusions can be good used to analyze the effect of the gel time on electrorheological fluid nature for ER clutch, and then improve the ER clutch performance.
Single Machine Scheduling and due Date Assignment with Past-Sequence-Dependent Delivery Times and General Position-Dependent Processing Times
Authors: Zhao Yu Fang
Published: August 2014

We studied single machine scheduling problems in which the jobs need to be delivered to customers after processing. It is assumed that the delivery times are proportional to the length of the already processed jobs, and a job's processing time depended on its position in a sequence. The objective functions include total earliness, the weighted number of tardy jobs and the cost of due date assignment. We analyzed these problems with two different due date assignment methods and conclude that the problems are polynomial time solvable.
Research on the Key Technology of Manufacturing Services Modeling under Cloud Manufacturing Environments
Authors: Liu Pei Zhi , Ji Jun , Chai Wei Yan , Zhao Xiao Chuan
Published: August 2014

To realize sharing and synergy between manufacturing resources and manufacturing capability in cloud manufacturing, the manufacturing service model is divided into function model and non-function model. Elements and description of function model is given, and function model determines manufacturing services’ combination planning. Also the composition of non-function model and each part’s weight is presented, and non-function model is the basis to evaluate the priority of manufacturing services. For the case of resource in cloud manufacturing services, sharing ontology and private ontology are researched. Sharing ontology is common description of the whole manufacturing domain, and private ontology is individual description of a specific manufacturing platform. The transformation between sharing ontology and private ontology provides a way for isomerism resources to invoke each other.
A Predicting Model for Demand Quantities of Downstream Manufacturer
Authors: Huang Hui Hsin
Published: August 2014

In industrial engineering and management, to know the demand quantities of downstream manufacturer is an important issue which can help the upstream suppliers to control and predict the level of manufacturing process. The supplier may encounter competitors who also provide the materials or product to the same downstream manufacturer. This paper proposes a stochastic model to forecast the total demand of the manufacture company with characteristic function. This model can be used to detect the quantities which are provided from other competitors to the same manufacturer.
Study on Sales System with Demand Affected by Delivery Lead Time
Authors: Tsai Chi Yang , Tu Cheng Yu , Hsieh Chang Yu
Published: August 2014

This research considers a direct sales system facing demand that is sensitive to both sales price and delivery lead time. The behavior pattern of such a direct sales channel is studied by utilizing the developed model, numerical experiment and sensitivity analysis. Our results reveal that when manufacturers’ capacity is set higher, customers would be less likely lost. In contrast, if manufacturers’ capacity is set lower, more potential customers may quickly be lost due to longer lead time. The outcome of analysis shows how major factors influence decision making and profits. Our findings may serve as a practical reference to enterprise in practice.
Design Coal Conveying Simulation System Based on Field Bus Power Plant
Authors: Hu Shao Zhong
Published: August 2014

Coal conveying system is an important part of power plant, the safe and reliable operation is to ensure that an indispensable link to realize safe and efficient power plants. At present our country generally adopt PLC, DCS coal conveying system. Belt system simulation is an important part in the simulation of a coal conveying system. This project is: Set up and using the model of belt system, Simulation of the belt normal start-stop, work fault, So as to realize simulation system was used to simulate industrial site, achieve the goal of conveying system debugging.
The Optical Fiber Connector Ceramic Insert Core Injection Mold Design
Authors: Ao Pei Yun
Published: August 2014

According to the structural characteristics of optical fiber connector Ceramic insert core, this article analyzed the structure technology of it. Based on Mold wizard module and Pro/Moldsign module. We conducted injection mold design of optical fiber connector ceramic insert core; Put forward the flow characteristics of zirconia powder injection feeding and binder, lubricants and other additive formulation.
Electrochemical Corrosion Behavior of AZ80 Magnesium Alloy Tube Fabricated by Hydrostatic Extrusion
Authors: Wu Zhi Lin , Wu Duo Xiang , Yuan Ren Shu , Zhao Lei , Zhao Yan Bao
Published: August 2014

The corrosion behavior of hydrostatic extruded tube AZ80 magnesium alloy was investigated by polarization curves and electrochemical impedance spectroscopy (EIS) in simulated atmosphere. The results indicated that, the corrosion resistance of the hydrostatic extruded AZ80 magnesium alloy with uneven deformed grains and increased sub-grains were obviously weakened, with larger corrosion current density in the polarization curves and lower corrosion resistances in the electrochemical impedance spectroscopy plots. This was mainly because of the hydrostatic extrusion which made AZ80 magnesium alloy within large numbers of dislocation tangles. So the residual stress increased the electrochemical activity of magnesium alloy which reduced the corrosion resistance of magnesium alloys.
Research on Affecting Factor of Preparation of Calcium Sulfate Whisker with FGD Gypsum
Authors: Wang Ying , Tan Dan Jun , Li Xiao , Li Fan , Wang Peng Qi , Yang Jie , He Liang
Published: August 2014

Using FGD gypsum as raw material, calcium sulfate whisker was prepared by hydrothermal synthesis method. Through testing the aspect ratio of calcium sulfate whisker, the effect of reaction temperature, reaction time, desulfurization gypsum slurry concentration and pH value on the growth of calcium sulfate whisker were deeply researched. The optimum conditions for the preparation were that the reaction temperature was 150 °C, reaction time was 270min, the slurry concentration was 10% and the slurry pH value was 6.
Orthogonal Experimental Study on Tool Wear in Machining CFRP with CVD Diamond Film Coated Tool
Authors: Liu Ju Dong , Yu Dong Ming , Jin Jia Wei , Ye Xian Zhen , Yang Xiao Fan
Published: August 2014

The influence of milling parameters on flank wear is investigated through the orthogonal experiment of milling carbon fiber reinforced plastics (CFRP) with CVD diamond film coated tools and cemented carbide tools. The results show that: the interaction between spindle speed and feed rate has significant impact on the flank wear of CVD diamond film coated tool, and the influence of factors to flank wear decrease in the order: interaction > feed rate > spindle speed > cutting width. When spindle speed of n is 5000r/min, feed rate of vf is 100mm/min, cutting width of ap is 1mm, the lifetime of CVD diamond film coated tool and the processing quality of CFRP parts can be improved.
Performance Test and Evaluation for Pixel CdZnTe Detector of Different Thickness
Authors: Tang Zhi Ling , Shen Min
Published: August 2014

Cadmium zinc telluride (CZT) material is one of the preferred materials for the fabrication of X-ray and gamma-ray detector. In this paper, it is presented an experimental detector system based on pixellated CZT semiconductor detector. The aim of this study is to get the photon energy suitable for different thickness detector, different photon energy acts on pixel CdZnTe detector of different thickness. We can obtain the energy spectrum estimation, energy resolution and peak efficiency by the experiment and simulation with the radiation source of 241Am and 137Cs acting on pixel CdZnTe detector. From experiment results, it can be found that at the high energy of 662keV the thicker CdZnTe detector is high. The characteristic of detector is better at the low energy when the detector thickness is thinner.
Effect of Constant-Strain Aging on Microstructure, Martensitic Transformation and Magnetic Property of Ni53Mn23.5Ga23.5 Ferromagnetic Shape Memory Alloy
Authors: Dong G.F.
Published: August 2014

The effect of constant-strain aged and unaged on microstructure, martensite transformation, Curie temperature and magnetic field induction strain of Ni53Mn23.5Ga23.5ferromagnetic shape memory alloy was investigated in detail. The results show that reverse martensitic transformation temperatures of constant-strain aged sample slowly decrease, which martensitic transformation temperatures almost unchanged. In addition, Curie temperature of constant-strain aged sample is almost maintains consistent with solution-treated sample, but slowly increases saturation magnetization of constant-strain aged sample than solution-treated sample. Finally, the sample of constant-strain aged sample showed a larger magnetic field induction strain of 402 ppm.
Influence of Laser Power on the Microstructure and Anti-Wear Performance of Laser Hybrid Plasma Spraying NiCr-Cr3C2 Coatings
Authors: Li Shu Qing , Liu Shun Hua , Li Qi Lian , Duan Yu Ping
Published: August 2014

The NiCr-Cr3C2 coatings were deposited on 38CrMoAl substrate by a laser hybrid plasma spraying (LHPS) technology in this study. The coatings’ microstructures and anti-wear performances with different laser power were characterized using an optical microscope, a scanning electron microscope, and the SRV test. The test results indicated that the laser power has great effect on the microstructure and performances of the LHPS coatings. And when the laser power is at the appropriate value, it can make the coating have more compact and homogeneous microstructure, exhibit less pores or micro-cracks, and the higher bonding strength and more excellent anti-wear performance of the coating are achieved.
Study on Micro Pore Structure Characteristics of Carbonate Cores of Low Permeability
Authors: Xiao Pu Fu , Yang Zheng Ming , Zhang Ya Pu , Gai Chang Cheng
Published: August 2014

In order to understand the characteristics and flow characteristics of the low permeability carbonate reservoir of Middle East, in this paper, we take a Middle Eastern oil field as an example, using constant-rate mercury penetration technique, analyzing the micro pore structure characteristics of carbonate cores. The results show that, the pore radius distribution characteristics of different permeability is similar, mostly between 90-200μm, the peak occur at about 120μm. After that, we get the main factor affecting the reservoir physical quality of carbonate reservoir is throat rather than pore. And compared with the same permeability of sandstone cores, found that even if a poor sorting and strong heterogeneity of carbonate cores, but due to its throat contribution to permeability is very balanced, show the low permeability carbonate difficulty of development smaller than sandstone, only reducing the pore throat ratio, improve the ability of reservoir seepage, can have a good development effect.
RTW Based Rapid Development of Hot Strip Mill Laminar Cooling Prediction Software
Authors: Wang Yi , Fu Xiao Wei , Chen Li , Li Xi
Published: August 2014

During the strip laminar cooling process, the switching of cooling valves is decided by different operating modes, initial and rolling-terminating conditions. Aimed at shortening the development cycle and at the same time assuring the quality and regularity of the controlling program, this paper has designed a hot strip laminar cooling prediction software adopting the RTW code generating technique. First, the Simulink model of the cooling process is built. Second, the model is converted by RTW into C code which can launch without Matlab. Finally, the graphical user interface design is completed with the generated code incorporated in. Experiment shows that the software developed with this method can gain the same results as Simulink model. The work of manual coding is substantially reduced. The combination of convenient modeling of Simulink and flexible GUI designing of VC can provide better reliability and practicability than traditional software developing.
Color Metallographic Technique for Microstructure Analysis of Aluminum Alloy Weld
Authors: Li Ya Bo , Liang Zhi Min , Wang Dian Long , Wang Jun
Published: August 2014

Through traditional corrosion method of aluminum alloy weld could only get a black-and-white metallographic structure. Color metallographic structure could be got by using color metallographic technique, which could improve discrimination of metallographic structure. The welding test pieces were got by using A7N01 and A6N01 aluminum sheets as base metal and E5356 and E4043 as welding wire. Through sampling, mounting, grinding and polishing process, metallographic specimens were obtained. Contrast test of aluminum alloy specimens was investigated. Conventional Keller’s reagent corrosion results showed the grain outline was not very clear and the grain boundary was fuzzy. Color metallographic corrosion results showed both the grain outline and boundary were very clear. Grains of different orientation and composition segregation presented different color. So color can be used to distinguish orientation and composition segregation. Color metallographic technique was better than black-and-white metallographic technique to observe the metallographic structure.
A Novelty Analysis Method of Solar-Pumped Laser with Fresnel Lens and Cr/Nd:YAG Ceramic
Authors: Lu Yu , Shen Zuo Chun
Published: August 2014

In this paper, the simple and effective experimental method is proposed for studying on the influence of tracing deviation on solar-pumped laser output performance. The threshold pumping power is obtained by the novelty method. The experimental setup of solar-pumped laser employed Fresnel lens of 1.4×1.05m2 and diffuse reflective conical cavity focusing solar radiation on the size of 5mm×60mm Cr/Nd:YAG ceramic. The effective threshold pumping power calculated is 190W, which is about 30% lower than reported results.
Electronic Properties of Au-Doped Narrow Armchair Graphene Nanoribbons: A First Principle Calculations
Authors: Wang Wei Hua , Zhao Cui Lan , Ma Xin Jun
Published: August 2014

The centre Au-doped armchair graphene nanoribbons (AGNRs) are investigated using the local density approximation based on density function theory. The charge density, electronic energy band and project density of states of centre Au-doped AGNRs are calculated. Our results indicate the charge density is transferred between C and Au atoms and mainly located on the Au atoms. The centre Au-doped AGNRs are an indirect band gap semiconductor with an energy gap of 1.046 eV. The Fermi level is located on valence band so that the AGNRs of doping Au become into degenerate semiconductor. The project density of states is calculated to reveal localization and hybridization between C-2pand Au-6s, 5delectronic states. The localization and hybridization are much stronger in the valence band. The hybridization between C-2pand Au-6pelectronic states are strongly in the conduction band.
Research about Mining Method of II Gold Ore Body in Duolanasayi
Authors: Wang Jun Qiang
Published: August 2014

Based on theIIgold ore body in Duolanasayi, some geological features of ore body are introduced. In order to decrease the ore dilution and mining loss rate in practical production process as well as make full use of resource, this paper proposes five mining methods and gives optimal combination of these methods after analyzing the advantage and disadvantage of the mining methods.
Recent Advances in Centrifugal Spinning Preparation of Nanofibers
Authors: Zou Wei , Chen Rong Yuan , Zhang Gui Zhen , Zhang Hai Chen , Qu Jin Ping
Published: August 2014

In recent years, due to the unique advantages of nanomaterials, they are widely used in many fields (including the field of tissue engineering, protective clothing, filters, sensors, etc.). How to prepare nanofibers has become a hot research topic. This paper outlines status quo of a class of preparing nonafibres. And this preparation is the centrifugal spinning including melt centrifugal spinning, centrifugal electrospinning and solution centrifugal spinning, which have broad prospects for development. And this paper also briefly describes theirs advantages and disadvantages. Finally, the development trend of centrifugal spinning is summarized.
Effect of Gb on Phase Transformation and Martensitic Phase Transformation in Ni–Mn–In Alloys
Authors: Cheng Ya Dong
Published: August 2014

The Ni-Mn-In alloy occur martensite reverse phase transitions driven by magnetic field in a certain composition range, resulting in the macroscopic strain, and along with the output of up to 108 MPa stress. However, there are some defects impeded practical application of alloy, such as brittleness and low Curie temperature. So, we will improve its mechanical properties by doping the suitable rare earth Gd elements in Ni-Mn-In alloy in this paper.In this paper, we study the microstructure, martensitic transformation and mechanical properties of Ni45.4Mn41.5-xIn13.1Gdx (x=0,0.2,0.5,1,2) magnetic shape memory alloy by DSC and Compression fracture strength and strain curve, which clarify the influence of Gd doping on martensitic phase transformation and mechanical properties of alloys.The studies have shown that the microstructure of the alloy changes from single organization into a mixed-phase structure of the matrix and the rich-Gd phase with the increasing of rare earth Gd content and martensitic transformation temperature of the alloys increases gradually with the increasing of Gd element content; The fracture strength and fracture strain increases first and then a decreasing trend with increasing the rare earth Gd elements. The result of the improved mechanical properties is the co-action of fine grain strengthening and second phase strengthening.
Effect of Cryogenic Treatment on the Performance of Ultrafine Cemented Carbide
Authors: Jiang Ai Min , Jiang Xian Quan , Yu Rong , Yang Rong Jie
Published: August 2014

The effect of cryogenic treatment on the mechanical and magnetic properties of WC–6% Co Ultrafine cemented carbides has been investigated in this paper. The results show that after the cryogenic treatment, the hardness slightly increases from 1750 to 1830, however, the transverse rupture strength decreases from 2510 MPa to 2480MPa. ,the magnetization decreased from 5.82% to 5.72%, decreasing 1.71%for 24 h, but the coercive force slightly increases and reaches the maximum of 24 kA/m for 2h.
The Application of Energy-Saving and Environment-Friendly Decorative Materials in Architectural Decoration Construction
Authors: Lian Xia
Published: August 2014

the living environment of people increasingly demanding, architectural decoration only simple demined formal beauty from the past and nowadays gradually develop into a comprehensive discipline, including energy-saving, environment protection and beauty. This paper is starting from the perspective of the development of building energy conservation, and is to make architectural decoration construction environment as a starting point to explore the application and development of environment-friendly building materials and energy-saving. And in the end it makes the prospect of building decoration materials.
Compressing Deformation and Microstructure of AZ61 Magnesium Alloy
Authors: Li Quan , Yang Jin , Liu Wen Jun , Luo Su Qin , Cheng Ren Ju , Li Cheng , Jiang Xian Quan , Pan Fu Sheng
Published: August 2014

Hot compression tests of AZ61 magnesium alloy were performed on gleeble1500D at strain rate ranged in 0.01~1s-1and deformation temperature 350~400°C.The results show that the flow stress and microstructures strongly depend on the deformation temperature and the strain rate. When the temperature was reduced and the strain rate was enhanced, the area after dynamic recrystallization was enhanced, and the average dynamically recrystallied grain size reduce. But the dynamically recrystallied grain size was not well-proportioned. In this paper the 350°C×1s-1was suggested.
A Study on Thermal Spraying Sacrificial Anode Applied in Concrete Structure Cathodic Protection
Authors: Wang Ya Ping
Published: August 2014

In this work, the thermal spraying sacrificial anode was investigated as reinforced concrete structure cathodic protection method. During our experiment, the performance of the thermal spraying sacrificial anode was studied using electrochemical method, metallographic microscopy method and simulation tests. And the results show that the thermal spraying sacrificial anodes are better than traditional sacrificial anodes. The method of thermal spraying applied in sacrificial anode field is successful, which solve the problem of insufficient driving initial potential of traditional sacrificial anode in the concrete structure.
Progress in CIS Series Thin Films Solar Cells
Authors: Zhang Li , Shi Lu Dan , Liu Ke Gao
Published: August 2014

Advances in the preparation and research of CuInSe2thin films solar cell are reviewed. The main attention is given to the effects of synthesis methods, including sputtering, spray pyrolysis, thermal evaporation, electrodeposition, dissolution-spin coating. And the structures, morphologies, compositions and photoelectrical performances of the CIS thin films synthesized by different methods are compared. The defects of different methods and research direction in the future were discussed.
The Design and Weaving of Glass Filament Spacer Fabric
Authors: Zhang Mei Ling , Yuan Li Jing , He Tao , Du Li Na
Published: August 2014

Glass filament reinforced composite materials have become an indispensable material in national economic construction. The main purpose of this project is to produce the spacer fabric adopting glass filament through changing weaving process. First glass filaments were treated with epoxy resin to prevent from its low bending rigidity. Second ground warps and binding warps were separately warped and double warp beams were used in the weaving. At the shed crossing point the height of heald frames was different between the top layer and down layer warps, then the drafting sequence of the top layer of warps, the down layer of warps and binding warps were adjusted. The cotton yarns were chosen as the selvage warps which have good wear resistance and uniform tension. The long and short beat–up method was used. Eventually 3cm thickness of glass filament spacer fabric is achieved. It is hoped that this work will provide meaningful help to the development of glass filament spacer fabric.
Surface Morphology and Dielectric Properties of KNN/PI Films
Authors: Lin Jia Qi , Lin Hui , Liu Ying
Published: August 2014

Polyimide (PI) films filled with K0.5Na0.5NbO3 particles at different weight 0wt%,5wt%,10wt%,15wt% and 20wt% had been prepared by in-situ dispersion polymerization process in this article. then we measured morphology and dielectric properties. when the mass fraction of KNN reach 20%, its dielectric constant achieve 4.9(100Hz) with the dielectric loss tangent value is less than 0.025 (100 Hz).it Shows the good insulating properties.
Investigation on the Morphology and Dielectric Properties of PI/SiO2 Nanocomposite Films
Authors: Lin Jia Qi , Liu Ying , Yang Wen Long , Lin Hui
Published: August 2014

Polyimide nanocomposite insulating materials are widely used in electrical and electron engineering owing to their outstanding electrical, mechanical, thermal, and wear-resistance properties. Polyimide/silica (PI/SiO2) nanocomposites have been prepared by the polymerization process of adding tetraethoxysilane (TEOS) and the coupling agent isocyanatopropyltriethoxysilane (ICTOS) in polyimide. The effects of SiO2addition on the microstructure and the dielectric property of nanocomposite films were investigated. It was found that the silica particles were well dispersed in PI matrix and the sizes of SiO2particles in the hybrid films range from 20 nm to 30 nm for 5-15 wt% SiO2loading in the matrix. The dielectric constant and the dielectric loss (tan δ) of these films increased with the increase of the content of silica particles.
Quantitative Analysis of the Element Silicon by Laser-Induced Breakdown Spectroscopy
Authors: Zhao Xiao Xia , Wang Yu Qin , Luo Wen Feng , Zhu Hai Yan , Li Yuan Yuan
Published: August 2014

The second harmonic of a pulsed Nd: YAG laser (532 nm) has been used for the ablation of aluminum alloy in air at atmospheric pressure and the laser-induced plasma characteristics are examined in detail. The electron density of 6.7 × 1017cm-3is inferred from the Stark broadening of the profile of Si (I) 288.16 nm, while the plasma temperature (5982 K) is obtained using the Boltzmann plot method of four neutral aluminum lines. The calibration curve for silicon is established using a set of six samples of standard aluminum alloy, and its limit of detection is 0.0681 wt%. The plasma is verified to be in local thermodynamic equilibrium (LTE) based on the experimental results.
Research Progress for Gypsum Retarder
Authors: Ren Xiao Qiong , Wu Ya Nan , Li Ying , Lin Mo Han , Zhao Feng Qing
Published: August 2014

Gypsum retarder is an important additive of building materials. Commercial gypsum retarders are mainly composed of four types: organic acids, phosphates, protein and composite retarder. Although the effects of organic acids and phosphates have better retarding performances, there is still obvious a shortcoming that the mechanical strength reduces largely with time going by. Protein based retarders prolong the setting time of hemihydrates with less strength loss and higher costs. The gypsum retarder from waste mycelium, a protein-rich raw material, solved the problem of the disposal of waste mycelium from anti-biotic plants, while producing high-quality retarder for gypsum, shows potential for future.
WP Enhanced PVA/LRSS Composite
Authors: Wu Chuan Bao
Published: August 2014

Composites with the chopped segments of lower part of rice straw (LRSS) as main constituent, poly (vinyl alcohol) (PVA) as adhesive constituent and waste paper (WP) as enhancing constituent were prepared by hot-pressing method. WP showed good enhancing role and certain toughening effect. WP made tensile strength increase by 86% and strength at tensile break by 69%; when composites were prepared at 40% PVA content, 140°C for 10 min. The tensile stretch and stretch at maximum tensile force of WP enhanced composite were respectively 16.5% and 14.3%, while those were respectively 12.3% and 11.9% without WP. The tensile strength of the composites increased with increasing PVA content. From 20% PVA content to 50% PVA content, tensile strength increased by 42.8%. When PVA content was 50%, the composite reached its maximum strength of 8.71 MPa. The hardness of composites lay between 91 and 97.
The Current Situation and Prospects of the Stability of Microcapsule Phase-Change Suspension`s Manufacturing
Authors: Liu Feng Jiao , Qiu Zhong Zhu , Chen Shi Wei
Published: August 2014

Several factors affecting the stability of microcapsules during its manufacturing process are introduced in this paper, mainly including the variety and dosage of adding additives, the stirring energy, the mass fraction, PH and temperature, carrier fluid and other factors on the physical stability. Then, this paper points out the future research direction.
Based on Shape Annealing Algorithm Single Crystal Finite Element Analysis
Authors: Meng Lei
Published: August 2014

Aclassofdistributedalgorithmsforcombinatorialoptimization.Inthispaperweanalyzesomepropertiesofshapeannealing,theuptonowbestperformingoftheshapeannealingalgorithmswehavetested.WereportmanyresultsregardingitsperformancewhenvaryingthevaluesofcontrolparametersandwecompareitwithsomeFEMalgorithms.Andinaccordancewithtreatmentprinciples,themicrostructureofthealloyissimulated.Thisalgorithmusesorthogonalcrossovertogenerateinitialpopulationanduseselitist-crossovertoincreasethegoodpatternsofthepopulationanduseshybridmutationtoincreasetheabilityoflocalandglobaloptimization.Ithasshownfascinatingresultswhenbeingusedintheoptimizationofmultimodalfunction.Theresultsshowedthat:Inthecreepperiod,thecorrespondingcubicγ′alongthevonMisesstressandstrainenergydensityofthecrystalfacetoformraft-likeorganizations.
Based on Tabu Algorithm Heat Treatment Analysis of the Alloy
Authors: Meng Lei
Published: August 2014

A class of distributed algorithms for combinatorial optimization. In this paper we analyze some properties of Tabu-cycle, the up to now best performing of the Tabu algorithms we have tested. We report many results regarding its performance when varying the values of control parameters and we compare it with some FEM algorithms. And in accordance with treatment principles, the microstructure of the alloy is simulated.
Process Study on Green Treatment of Waste Anolyte
Authors: Chen Li Na , Liu Wan Yi , Hu Qi Lin
Published: August 2014

Contraposing the waste anolyte of industry, the paper proposed a new chemical precipitation method to recover Mn (II) ions and Mg (II) ions from the waste solution using ammonium hydrogen carbonate and ammonium dihydrogen phosphate as precipitants, respectively. The technological conditions of dealing procedure such as the molar ratio of reactants, pH value, reaction temperature and time, aging time were investigated. The results shown that the removal rate of Mn (II) ions and Mg (II) ions reached to 96 % and 98 %, and the yields of MnCO3 and NH4MgPO4·6H2O reached to 91 % and 94 %, respectively. The residual solution was recycled to realize the treatment greenly, which could meet the needs of production and increase environmental benefits.
The Chemical Constituents Study in the Root of Astragalus membranceus
Authors: Tan Ri Hong
Published: August 2014

To sdudy the chemical constituents in root of Astragalus membranceus. Compounds were separated and purified by polyamide column and silica gel column. seven compounds (I--VII) were obtained from the root of Astragalus membranceus:Sucarose (I), β-Sitosterol (II), Formnonetin (7-hydroxy-4-methoxyiso-flavove III), Calycosin (7,3-dihydroxy-4-methoxyisoflavove IV). Their structures were identified On the base melting point, value of Rf, spectral methods. Compounds III and IV are first isolated from the root of Astragalus membranceus. Compounds I,II,V, VI and VII are Compounds are isolated from the root of Astragalus membranceus.
Effect of Gamma Irradiation on the Migration of Di(2-Ethylhexyl) Phthalate from Plasticized Poly(Vinyl Chloride) into Air and PVC Resin
Authors: Wang Qin , Wu Wei , Tang Yan Fang , Bian Jian Jian , Zhu Song Wei
Published: August 2014

The risk of di (2-ethylhexyl) phthalate (DEHP) migration from plasticized poly (vinyl chloride) (PVC) is an important issue for patients.We present a study on the effect of gamma radiation on the migration of DEHP from plasticized PVC into air and PVC as a function of time (0-28day) at 75°C.The samples were irradiated at dose of 25 kGy using a 60Co gamma radiation source.The change of weight loss at 75°C was studied as a function of time.Diffusion coefficient of samples was calculated,it was found that the diffusion coefficient significant increased after irradiation,the sample having ESO exhibited an decrease trend of DEHP migration,which shown that ESO can effectively impress the migration of DEHP from plasticized PVC either in control or irradiate samples,the same Phenomenon was found in air and PVC.The diffusion coefficient was between 8.37×10-11 and 2.68×10-10 cm2/s in air, 8.87×10-8 and 9.99×10-8 cm2/s in PVC.
Processes on the Thermodynamic Properties of Lithium Borates
Authors: Hu Hai Qing , Zhang Si Si , Guo Ya Fei , Deng Tian Long
Published: August 2014

In this paper, the thermodynamic properties including the standard molar enthalpies of formation, the standard molar entropies of formation and the standard molar Gibbs free energy of formation of hydrated lithium borates and the water vapor pressures, the osmotic coefficients, the enthalpy of dilution, the molar heat capacity of aqueous lithium borate solution systems were summarized and the new trend in the future was also pointed out.
Research on the Mixing way and Content of Molybdenum Disulfide with Copper Matrix Self-Lubricating Composites
Authors: Ran Xu , Ren Xiang , Zou Hao Hao , Ye Yi Fei
Published: August 2014

The new type of copper matrix self-lubricating composites were prepared by powder metallurgy route. The influences of milling way and content of molybdenum disulfide on composites’ microstructure and tribological properties were researched. It is found that, MoS2 can’t participate in the process of mechanical alloying together with graphite and copper powder. When the mass fraction of MoS2 increases from 0% to 10%, the coefficient of friction of composites MoS2-G-Cu reduces correspondingly, however the three-dimensional network structure of copper matrix was damaged seriously in sample 10% MoS2-G-Cu .After the wear text there will come out solid self-lubricating film on the surface of sample 5% MoS2-G-Cu and 10% MoS2-G-Cu .
Acid Properties of MCM-36 Molecular Sieve and its Catalytic Behavior in Benzene Alkylation with Propylene
Authors: Zhao Fei , Zhang Yu , Jiang Wen Jing
Published: August 2014

Pillared layered MCM-36 zeolite was synthesized from pure MCM-22 precursor with polymeric silica as pillaring agent. Characterization results of acidic properties from FT-IR indicate a decrease in the amounts of Lewis acidic and Brønsted acidic. The catalytic behavior of pillared layered MCM-36 zeolite in benzene alkylation with propylene was studied. It was found that pillared MCM-36 zeolite shows stable catalytic activity in a 200h time-on-stream measurement under a relatively high propylene velocity space. The excellent selectivity to cumene over MCM-36 should be mainly due to the decrease in the amount of Brønsted acidity, while the improvement of the catalytic activity of MCM-36 can be mainly assigned to the presence of a larger amount of structurally accessible acid sites caused by the increment of mesoporous volume in this material.
Synthesis and Electrochemical Performances of Nanoscale TiO2 as Anode Material for Lithium Ion Batteries
Authors: Zhao Ye Jun , Pan Zu Ting
Published: August 2014

The nanoscale TiO2 was synthesized and their electrochemical properties as the anode electrode materials for rechargeable Li-ion batteries were measured. The structure, morphology and electrochemical properties of the nanoscale TiO2 composites synthesized were characterized in detail by X-ray (XRD), Transmission Electron Microscopy (TEM) and electrochemical measurement. The first discharge capacities were 126 mAh/g for the nanoscale TiO2 at the current density of 100 mA/g at ambient temperatures. The specific capacities were stabilized at around 57mAh/g after 20 cycles.
Preparation and Properties of Nylon 6/66 Copolymer with a Small Proportion of Hexamethylene Adipamide Salt
Authors: Yu Yu Wen , Shu Ke Wen , Zhong Ling , Zeng Cheng Cai , Zhang Dong
Published: August 2014

Nylon 6/66 copolymer with 0-10wt% content of hexamethylene adipamide salt (AH-salt) was prepared by melt polycondensation. It was found that the comprehensive performance of the copolymer was the best with 8wt% content of AH-salt through the test of tensile properties and bibulous rate. Compared with the performance of nylon 6 under the same condition, the elongation at break was increased by 131.04% (the stretching rate was 30mm•min-1) to 274.41%, the tensile strength increased by 19.38% to 64.68MPa, and the bibulous rate was decreased by 8.58% to 2.14%.
Thermal Conversion Characteristics of Coal Tar Soft Pitch at Atmospheric and Elevated Pressures
Authors: Yue Li , Zhao Xue Fei , Lai Shi Quan , Gao Li Juan , Yang Jie , Han Ming Xi
Published: August 2014

Coal tar soft pitch (CTSP) used as raw material of preparing needle coke was heat-treated at 460, 480 and 500 °C for different holding time under the pressure of 0 MPa and 0.25 MPa. The changes of group compositions such as toluene solubles (TS), toluene insolubles-quinoline solubles (TI-QS) and quinoline insolubles (QI) were mainly studies during the thermal conversion of the CTSP. The microstructure morphologies of some calcined cokes were characterized by scanning electron microscope (SEM). The results showed that the thermal conversion of the CTSP had the features of consecutive reaction, and the pressure could accelerate the conversion rate of TS and TI-QS and the formation rate of QI. The calcined coke derived from the semi-coke obtained at atmospheric pressure exhibited better and longer streamlined fiber structures than that of the semi-coke obtained at elevated pressure, while the latter possessed more compact carbon structures than the former.
The Mineralization of Calcium Carbonate in Mixed Solvent Controlled by Polystyrene-b-poly(vinyl pyrrolidone)
Authors: Wang Jia , Xia Yu Min , Wang Yan Ping , Wang Yi Min
Published: August 2014

Calcium carbonate (CaCO3) was mineralized in N,N-dimethylformamide (DMF)-H2O mixed solvents in the presence of polystyrene-b-poly (vinyl pyrrolidone) (PS-b-PNVP) block copolymer. The morphologies of PS-b-PNVP micelles and CaCO3crystals were characterized by TEM and SEM. By varying the volume ratio of DMF-H2O, the CaCO3crystals with different morphologies and phases were obtained. It was convinced that the morphology of crew cut micelles played a key role in the morphological formation of CaCO3.
Cobalt Ion Extraction by 2-Ethylhexyl Phosphoric Acid Mono-2-Ethylhexyl Ester Microemulsion Saponified
Authors: Huang Du Shu , Yin Jin Hong , Lv Xian Shu , Xu Yan , Wu Jie
Published: August 2014

The extraction process of cobalt using microemulsion system saponified with P507 as extracting agent was studied. The influences of initial concentration, the concentration of P507, initial pH, the extracting time and the volume ratio of organic phase to water phase on extraction coefficient were also studied. Experimental results show that the saponification microemulsion system using P507 as extractant is thermodynamic stable, and it can separate cobalt better. The optimum conditions were achieved as: the initial concentration is 0.04 mol/L, pH is 2; The concentration of P507 is 6%, extraction time is 6 min; The volume ratio of organic phase to water phase is 1.5:1.
Study on Effect of Sericin on Size and Shape of Silver Nanoparticles Prepared by a Redox Method
Authors: Wu Men , Wang Dong Sheng
Published: August 2014

Silk sericin is used as a biotemplate to redox silver nanoparticles in situ at room temperature. Silk sericin provides multiple functions in the whole reaction system, serving as the reducing agent of Ag+, and the dispersing and stabilizing agent of the resulted silver nanoparticles. The effect of the concentration of sericin on size and shape of the reduced silver nanoparticles is studied. UV-vis spectra and TEM are used to detected the characteristic plasmon and the appearance of the obtained silver nanoparticles.
Blue Phosphorescent Organic Light-Emitting Diodes Based on Biphenyl (Spiro[fuorene-9,9′-yanthen]-2-yl) Phosphine Oxide Host
Authors: Qu Da Long , Zhang Zheng Song , Yue Shou Zheng , Guo Run Da , Yan Ping Rui , Wu Yu Kun , Zhao Yi
Published: August 2014

We report on blue phosphorescent organic light-emitting diodes (PHOLEDs) with biphenyl (Spiro [fluorene-9,9′-xanthen]-2-yl) phosphine oxide (SFX2PO) host. The device studied in this work has the structure of ITO/m-MTDATA:MoOx3:1(8nm)/m-MTDATA(32nm)/ TAPC(10nm)/SFX2PO: Firpic (10nm)/Bphen (40nm)/LiF(1nm)/Al (200nm). Maximum luminance of 9120 cd/m2 and power efficiency of 16.84 lm/w have been achieved in this device.