bluuebunny/crossref_metadata_2025 huggingface dataset:
The Study of Remaining Oil Distribution in Tazhong 4 Oilfield’s TZ402CIII Oil Group
Authors: Liu Yi Kun , Wang Zhen , Tang Hui Min , Wang Jin Ming , Zhao Wen Hui , Wang Yong Ping
Published: June 2014

With the deepening exploitation percent, underground water relations have become more complex and tap the oil field at stable yields is more and more difficult, thus make us develop in depth study about the remaining oil distribution become critical. The proved geological reserve is high and physical property is better in 402 block’s group CIII of Tazhong 4 Oilfield. Combined with current mining situation in TZ402CIII oil group and in order to proven the distribution of the remaining oil, we used common reservoir engineering methods, neutron lifetime logging data analysis over the years and sweep efficiency analysis from sealed coring wells to study in-depth current remaining oil distribution range in TZ402CIII oil group, which provide an important basis to further improve development effect, dig remaining oil, as well as secondary development and adjust tap the potential in TZ402CIII oil group.
Study of the Trellis Support of Working Face Roadway in Impact Coal Seam
Authors: Lv Yu Kai , Jiang Cong , Jiang Yao Dong
Published: June 2014

Coal bumps happened many times in mining at No.5 seam of Tangshan coal mine. Strengthen the roadway’s support of working face can effectively reduce disaster losses. With the research background of the 3654 working face, the mine pressure monitoring for the existing support form of roadway has been carried on. Perform a numerical simulation for the original roadway support, base on the in-situ stress and physical and mechanical characteristics of surrounding rock in experimental; study the impact of the stability of roadway’s surrounding rock, while the space change of trellis and change of supporting intensity; optimizing the original support form, so as to maximum reducing the impact of the coal bumps.
Plugging Agent Type Selecting Methods for Channeling Reservoir
Authors: Wang Shuo Liang , Zhang Yuan
Published: June 2014

The breakthrough flow of injected water and polymer caused by heterogeneous formation is a serious problem in many oil fields, and the problem has become an important restraint to oil development. The profile control and water shutoff plan is determined by experienced and subjective human judgments, the blocking agent selection and plugging agent dosage are lack of scientific basis. Based on a reservoir engineering study, this article proposes an internal pressure calculation model and an injection pressure calculation model, the ultimate gradient of breakthrough pressure and plugging agent working viscosity. Combining methods of plugging agent performance evaluation method, we conclude the matching relation between characteristic parameter of thief zone and performance of plugging agent. A method for selecting a plugging agent in the light of thief zone is established. Case study results reveal the practicability and effectiveness of this method.
Study on Deep Reduction of Oolitic Hematite Assisted with Microwave Radiation
Authors: Ma Zhi Hong , Zhang Jin Zhu , Li Wei , Chen Jing
Published: June 2014

The oolitic hematite will be a potential source of raw iron ore for the Chinese iron and steel industry. Up to now, the oolitic hematite have hardly been utilized effectively by any single traditional technology. The deep reduction assisted with microwave radiation may be a practical technology for the exploitation of oolitic hematite. The results show that the metallization rate can be obtained to 88.91%, and the iron recovery up to 90.70% for the oolitic hematite with an iron content 51.19%, when the deep reduction parameters are as follows, the reduction temperature is 1050°C, the residence time is 45min, and the ratio of reducing agent is 24%.
The Characterization of the Rock Microscopic Pore Structure before and after Strong Base ASP Flooding
Authors: Fan Meng , Liu Yi Kun , Liang Shuang
Published: June 2014

ASP flooding technology is an important means to further improve oil recovery of oil field later high water-cut stage. As is found in pilot test of ASP flooding, in the process of injecting ASP combinational flooding fluid, alkaline chemical react with the rocks minerals in reservoir and dissolve and elute the portion of the silicon in rocks minerals after injecting into formation. Due to the mixed flow occurred in near well bore zone and the changes in pressure and temperature, produced liquid produces mixed silicon scale near the well .The serious scaling phenomenon has affected the production efficiency and the further popularization of the ASP flooding technology.The serious scaling phenomenon has affected the production efficiency and the further popularization of the ASP flooding technology.It is very important to study and solve the problem of ASP flooding silicon scale.In this paper,we studied the interaction ternary displacement liquid and formation, analysised the physical and chemical processes of silicon scale, researched and analysised the differences on the microscopic pore structure between water flooding cores and ASP flooding cores as well as the situation of silicon scale after the ASP flooding by using SEM technology.
Discussion on Support Problems on Soft Rock Roadway
Authors: Li Ming
Published: June 2014

Because of the rapid development of China's coal industry, the average depth of mine increase continuelly, the stress increases obviously, roadway are often difficult to support in many coal mine especially in soft rock. Soft rock have traits of low strength, expansion and rheology seriously, affect the safety of mine production and economic benefits, thus the supporting of soft rock roadway engineering has become one of the most complex and the most major problems to solve. By analysising the deformation characteristics of soft rock and deformation characteristics and influence factors of soft rock roadway, We discuss the supporting method and supporting principle of soft rock roadway.
Influence of Overburning on Microstructure and Property of 2024 Aluminum Alloy
Authors: Zhang Shi Xing , Zhu Yu Ping , Cai Gang Yi
Published: June 2014

Process of solution treatment of 2024 aluminum alloy was done by hardness test and microanalysis in this paper. The effects of different solution treatment temperature on the microstructure and mechanical properties of 2024 aluminum alloy were studied and the influence of overburning on the microstructure and mechanical properties of 2024 aluminum alloy were also analyzed. The experimental results show that overburning occurs while 2024 aluminum alloy is heated over 490°C×50min . The hardness tests and microstructure analysis results show that the hardness decreased, grain boundary becomes trigemanal and compounded –melting structure (burnt structure) appeared when overburning occuring for this alloy .
Influence of Cooling Speed on the Microstructure of Particles Reinforced 7055Al Composites Subject to Regulatory Cryogenic Treatment
Authors: Li Guirong , Wang Hong Ming , Cui Yu Hua , Li Yue Ming , Peng Cong Xiang , Li Pei Si , Zheng Rui , Zhao Yu Tao , Jiang Yan
Published: June 2014

Al3Ti and Al3Zr particles reinforced 7055Al composites were processed by cryogenic treatment with different cooling speed at 1°C/min, 3°C/min and 5°C/min. Transmission Electronic Microscopy (TEM) was mainly used to analyze the microstructural evolution of the treated samples. The results show that with the increase of cooling speed the precipitate amount and dislocation density have been increased. The precipitates orientation exhibits some preferred orientation. The mechanical properties test demonstrates that for the samples treated at 5°C/min the tensile strength and elongation has arrived at the utmost.
A Study of Polyurethane Rubber Composite Modified Asphalt Mixture
Authors: Yao Zhong Ping , Li Meng , Liu Wei , Chen Zhen Bei , Zhang Rong Hui
Published: June 2014

Use polyurethane rubber composite modified asphalt.Through the Marshall test and rutting test, test of polyurethane rubber asphalt mixture high temperature stability, low temperature crack resistance and water damage resistance, verify the composite modification advantages.
Fluorescence Properties of Electrospun Bio-Based Polyamide/Eu(TTA)3phen Composite Fibers
Authors: Yang Xiao , Wang Bin , Jia Qing Xiu , Tian Wan Xue
Published: June 2014

In this paper, the bio-based aliphatic copolyamide (bio-based PA) was synthesized by bio-based diacids and diamines, and Eu (TTA)3phen of Lanthanide complexes was synthesized. Then bio-based polyamide/rare earth composite fibers were prepared by electrospinning method. The structure and properties of the electrospun composite fibers were characterized by fluorescence photometer, x-ray diffraction (XRD), scanning electron microscope (SEM), and Fourier transform infrared spectroscopy (FTIR). The results showed that, with the increase of the content of rare earth, the fluorescent intensity of bio-based polyamide/rare earth composite fibers first increased, and then decreased. When the content of rare earth was 10%wt, the fluorescence property of the electrospun composites was best.
Effect of Collect Distance on the Fabrication of Aligned Nanofiber by Parallel Electrode
Authors: Liu Hong Ying , Xu Lan , Tang Xiao Peng , Si Na
Published: June 2014

Electrospinning has been applied to prepare uniaxially aligned nanofibers made of organic polymers, ceramics, and polymer/ceramic composites. The highly aligned PAN nanofiber was successfully fabricated by the simple rapid method for preparing parallel micropipette electrodes. The effect of collect distance on the degree of aligned nanofibers and diameter distribution as well as the variation trend was explored and reseached.
Performance of Electrospun Nanofibres on Adsorbing Gaseous Aromatic Compounds
Authors: Deng Si Wei , Qu Zi Jian , Deng Jian Jun , Wang Yu , Yu Shi Bing , Kang Xue Jun
Published: June 2014

The objective of this study was to research the performance of the electrospun polystyrene-acrylic resin composite nanofibre on the adsorption of gaseous aromatic compounds, such as benzene and chlorobenzene. The equilibrium adsorption amount of benzene was 254.3 μg mg-1, while the equilibrium adsorption amount of chlorobenzene was 2.5 μg mg-1. The dynamic adsorption of the two compounds onto the composite nanofibres was also studied. Comparing with the conventional adsorbent (Tenax-TA), the performace of this nanofibre was well as that of Tenax-TA. The results of comparison confirm that electrospun nanofibres can be a potential adsorbent for the sampling of gaseous aromatic compounds.
Influence of MgO on Calcium Aluminate Slag System with Lower Calcium
Authors: Wang Bo , Zhang Jian Xin , Sun Hui Lan , Zong Shu Feng
Published: June 2014

The effect of MgO on phase composition, alumina leaching properties and the self-disintegrating rate of calcium aluminate slag were investigated by X-ray diffraction and another analysis method. And a feasible method is proposed to eliminate the negative effects of MgO. The results shows that: the phase of 2CaO·SiO2(C2S)、20CaO·13Al2O3·3MgO·3SiO2(Q phase) and 12CaO·7Al2O3(C12A7) are formed when there is MgO in slag with the C/A=1.4 and A/S=1.3. The content of Q phase increase and the leaching rate of slag reduce with increasing the temperature and the content of MgO. MgO would reduce self-disintegrating rate of slag. CaSO4·2H2O can improve the self-disintegrating the leaching properties of slag by promoting the synthesis of C12A7 and inhibit the synthesis of Q phase.
Study on Preparation and Property of Regenerated Liquid Reactive Dyes Regenerated Magenta
Authors: Yang Hong Lin , Xiang Wei , Chen Guang Jie
Published: June 2014

The regenerated liquid reactive dye Regenerated Magenta had been prepared with the waste reactive ink of Jettex R Magenta in the process of digital inkjet printing. The effects of quality percentage of waste ink, cosolvent, pH regulator on the stabilities of Regenerated Magenta had been investigated. The results show that the Regenerated Magenta ink prepared with waste ink 26%, N-methyl-2-pyrrolidone 4%, THAM 1%, ethanediol 3% and deionized water 67% has good performances such as particle sizes, surface tension, viscosity and conductivity. The characteristics of Regenerated Magenta ink meet the demands of the ink for digital inkjet printing.
Influence of Softener on Rheological Characteristics of the Nanostructured Modifier
Authors: Nelubova Viktoriya Viktorovna , Strokova Valeria Valerievna , Altynnik Nataliya Igorevna , Podgorniy Iliya Igorevich
Published: June 2014

Article is devoted to studying of influence of additives on rheology of the nanostructured modifier on the basis of silica-containing raw materials. Optimum technological combinations of the plasticizer were defined, which allow to change flow character of a suspension and to give to a material necessary properties. Basic possibility to use additives on a melamine-formaldehyde basis for plasticization of the nanostructured modifiers of silicate structure is proved.
Quasicontinuum Analysis of Dislocation Propagation during Nanocontact
Authors: Wang Hong Sheng , Ni Yu Shan , Lu Huai Bao
Published: June 2014

Multiscale simulations using the quasicontinuum (QC) method with the embedded-atom method (EAM) potential are performed to investigate the process of nanocontact including sliding and subsequent withdrawal between Ni tip and Au substrate. The multiscale model reveals that deformation twinning in Au substrate is induced not only by the sheer stress but also by the adhesive stress. Combining with the generalized planar fault energy (GPF) curve of Au, the underlying formation mechanism of deformation twinning is studied in detail. During the withdrawal process, the dislocation degeneration and the vacancy evolution are observed.
Processing Map of Mg-13Al-3Ca-3Zn-1Nd-0.2Mn Magnesium Alloy
Authors: Chen Wei , Chen Gang , Zhai Jing , Ma Li
Published: June 2014

Compression tests of Mg-13Al-3Ca-3Zn-1Nd-0.2Mn Magnesium alloy as-extruded had been performed in the compression temperature range from 200°C to 400°C and the strain rate range from 0.001 s−1 to 10 s−1 and the flow stress data obtained from the tests were used to develop the power dissipation map, instability map and processing map. The most unsuitable zones in the power dissipation map including 200°C - 315°C and 0.01s-1- 0.1s-1 zone, 315°C - 400°C and 0.001s-1- 0.01s-1zone and 340°C - 360°C and 0.32 s-1- 0.56 s-1zone. The most unsuitable zones in the instability map are 310°C - 400°C, 0.001s-1to 0.56 s-1zone and 330°C - 400°C, 1s-1to 10 s-1zone. The most suitable temperature range is 330°C - 400°C and most optimal strain rate ranges are 1 s-1- 10 s-1and 0.001s-1- 0.56 s-1.
Polarization Dependent Nonlinear Absorption in Au Nanowire Array
Authors: Xing Ruo Chen , Xiao Si , He Jun
Published: June 2014

The polarization dependent nonlinear absorption was observed in ordered Au nanowire array. The linear and nonlinear polarized absorption at 780 nm is investigated by Z-scan. When the angle between the polarization direction of input laser and the long axis of Au nanowires is 90°(perpendicular), the linear absorption reaches the maximum and the nonlinear absorption reaches the minimum. The nonlinear absorption coefficient β decreases from positive to negative as the angle increase from 0° to 90°. There may be two nonlinear absorption mechanisms resulting in this phenomenon: two-photon absorption and saturable absorption in nanoscale.
Influence of Complexing Agent on the Structure and Properties of Electrodeposited Fe–Co Alloy Nanowires
Authors: Wang Li Rong , Li Hai Tao
Published: June 2014

Ordered magnetic FexCo1-x alloy nanowires were synthesized in a porous alumina template by electrodeposition. The structural and magnetic properties of the as-deposited nanowires were investigated by SEM, TEM, XRD, EDS and VSM, respectively. The influence of the complexing agent on the stoichiometric properties is discussed, and the results indicate that the modulation of buffer and complexing agent has great influence on the electrodeposition process.
Microwave Dielectric Properties of Low-Fired Nd2Ti2SiO9 Ceramics with BaCu (B2O5) Addition
Authors: Chen Guo Hua , Kang Xiao Ling , Yang Yun
Published: June 2014

Nd2Ti2SiO9 ceramics with low-firing temperature by BaCu (B2O5) addition were prepared by the conventional solid-state reaction route and the sintering behavior, phase purity, microstructure and microwave dielectric properties were investigated. The XRD analysis results show a single phase Nd2Ti2SiO9 is formed and no secondary phase is found. Addition of BaCu (B2O5) can effectively lower the firing temperature by about 150 °C. The Nd2Ti2SiO9 ceramics with 4wt% BaCu (B2O5) sintered at 1150 °C exhibit good microwave dielectric properties with a permittivity of 28.8, a Q×f value of 16110 GHz, and a temperature coefficient of resonant frequency of-12.3 ppm /°C, which is suitable for microwave communication applications.
Research and Transformation of Rotary Surface Discharge Machining Equipment of Engineering Ceramic
Authors: Zhang Li Xin
Published: June 2014

This paper introduces a kind of rotary surface processing technique which is realized through installing a main shaft on common digital control wire-electrode cutter to drive rotary workpiece. Then the discharge machining test is conducted to study the surface roughness which is the main factor influences the surface quality, and then it comes to a test conclusion that installing electrode wire restrainer and auxiliary electrode device can improve the machining surface quality of rotary surface discharge. It has also provided the basis for further optimizing machining parameters in later study.
Preparation of the System of MgO-CaO-SiO2-Al2O3-Y2O3 Wear-Resistant Alumina Ceramics
Authors: Xiong Yuan , Wu Bo Lin
Published: June 2014

In order to improve the wear resistance and reduce the sintering temperature of alumina ceramics, Y2O3powder added in the system of MgO-CaO-SiO2-Al2O3alumina ceramics were prepared by the technique of pressureless sintering. The properties of the ceramic samples were investigated by the measurements of bulk density, wear rate, X-ray diffraction (XRD) and scanning electron microscopy (SEM). The results show that the wear rate of alumina ceramic contenting Y2O3 of the 0.8wt% is 0.041‰. Adding the yttrium oxide to the raw materials and then calcine them to ceramics, which can reduces the sintering temperature, promote the densification and improve wear-resistant property of alumina ceramics.
Study on the Crystal Bonding Mechanism of Al2O3–ZrO2 Ceramic Composite
Authors: Tian Xiao Li , Xue Qun Hu , Xue Chong Bo
Published: June 2014

Al2O3–ZrO2 ceramic composite samples were prepared using Al2O3–ZrO2 composite powder synthesized by sol-gel processing as the main starting material and zirconia gel as the binder. Then the mineral phases were analyzed by X-ray diffraction (XRD) and the crystal bonding mechanism was analyzed by scanning electron microscopy (SEM). The results show that: 1) the mineral phases were monoclinic zirconia, tetragonal zirconia and corundum. The microstructure shows an alumina-zirconia diffusion mosaic structure and the grain boundary interface with direct bonding state. 2) The crystal growth model was the Ostwald dual growth model of the alumina and zirconia grains, and the crystal bonding mechanism was that the intragranular zirconia grain exited within the alumina grain and the intergranular zirconia grain exited during the alumina grain boundaries.
Analysis of Pop-In Phenomenon in the Process of Ceramic Materials Instrumented Indentation
Authors: Wang Jia Liang , Ma De Jun , Chen Wei , Huang Yong , Sun Liang
Published: June 2014

Based on the finite element analysis method, the relationship between two systems of crack (radial crack and lateral crack) and pop-in phenomenon were compared during the instrumented indentation process in ceramic materials. In order to give a reasonable explanation for mechanism analysis of pop-in phenomenon in the process of ceramic materials instrumented indentation, this paper proposed the viewpoint that pop-in phenomenon is caused by the lateral crack in the process of ceramic materials instrumented indentation. This work provided a theoretical basis for the study of instrumented indentation methodologies based on the pop-in phenomenon to determining mechanical properties of ceramic materials.
Characteristics Research of Gallium Arsenide Solar Cells under Femtosecond Laser Illumination
Authors: Xiao Si , Gao Yi Tan , Tian Xiu Qin , He Jun
Published: June 2014

Femtosecond laser with ultrashort pulse (≤35fs) is used to investigate the damage threshold and light-to-electric conversion efficiency of gallium arsenide solar cells. Different from nanosecond or picosecond lasers, the damage threshold of the solar cell illuminated by femtosecond laser is slightly higher than that under the illumination of continuous-waves laser with the same wavelength. Because the thermal non-equilibrium effect becomes obvious, heat conduction phenomenon no longer obeys the law of Fourier, when the heating pulse time of femtosecond laser is equal to or shorter than the electron-phonon coupling time. The photovoltaic properties of gallium arsenide solar cells under femtosecond pulse laser illumination are measured. The device shows better short circuit current and the light-to-electric conversion efficiency under femtosecond pulse laser than that under continuous-waves laser of the same wavelength.
The Modification of Anatase TiO2 (001) Surface by N or S Atom: A DFT Investigation
Authors: Li Zong Bao , Wang Xia
Published: June 2014

The electronic of S-doped and N-doped anatase TiO2(001) surfaces were investigated using the density functional theory (DFT). Substitutional and interstitial configurations of N and S atoms doped in anatase TiO2(001) surface and sub-surface at different sites were considered and all the formation energies were obtained. The perfect strutures of atoms doping were obstained by formation energies comparisions. The electronic structures of the results indicated that the elemental doping has much more efficient and stable photocatalyst than the pristine one, which narrowed the band gap of TiO2and improved its visible-light response activity.
Carrier Injection in High Gain GaAs Photoconductive Semiconductor Switches
Authors: Zheng Li , Liu Hong
Published: June 2014

The carrier injection in high gain semi-insulating GaAs photoconductive semiconductor switches (PCSS) is studied. A great quantity of carrier generation in the insulating region of the GaAs PCSS depends upon photo-ionization and impact ionization. The impact ionization avalanche carrier generation exists in the electron avalanche domains (EAD). The EAD is closely related to the growing domains associated with carrier injection. Carriers are injected either at the contacts (Cathode and Anode) or at the tip of the current filaments which works as a “contact reaching further into the gap”. Carrier injection plays an important role for the EAD formation.
Manufacture Technology for Large Lightweight Optical Materials
Authors: Chen Ya
Published: June 2014

In this paper, the performance comparison between glass ceramics (Zerodur) and silicon carbide (SiC) which are two kinds of common materials used for space optical reflector is carried out, and several lightweight structure forms are analyzed. The oval plane reflector is applied in ultra-low temperature environment of space, take this kind of reflector as an example, its lightweight structure is optimized by CAD, then through finite element analysis, deformation of the planar lightweight mirror is 0.014λ (rms) in gravity condition, and deformation is 0.002λ (rms) in ultra-low temperature of-150 degrees environment. The actual lightweight processing is controled by the CNC system in a graphical way, and using chemical method to eliminate the stress and micro crack generated during processing, its final surface shape precision reaches 0.022λ (rms). Finally, this paper introduces the manufacture method of novel silicon carbide (SiC), and analyzes the current situation and development trends of the spatial lightweight reflector manufacturing technology.
The Luminescence Properties of Ca3(BO3)2 Doped with Ce3+, Tb3+
Authors: Lin Hui Hong , Lin Yan Ru , Fang Gui Po
Published: June 2014

The phosphors Ca3(BO3)2: Ce3+, Ca3(BO3)2: Tb3+ and Ca3(BO3)2: Ce3+, Tb3+ were synthesized by the solid-state reaction method at high temperature. The phase purity was characterized by the powder x-ray diffraction (XRD). The luminescence properties were investigated by ultraviolet (UV)-Vis spectra. For the phosphor Ca3(BO3)2: Ce3+, the lowest 5d levels, the emission and the Stokes shifts of Ce3+ in the host lattice are identified. For the phosphor Ca3(BO3)2: Tb3+, the f-d transitions of Tb3+ in the host lattice are assigned and discussed. Moreover, the energy transfer phenomenon between Ce3+ and Tb3+ in Ca3(BO3)2: Ce3+, Tb3+ has been discussed. The emission of Tb3+ is remarkably enhanced due to energy transfer from Ce3+ to Tb3+ when Ce3+, Tb3+ doped together in Ca3(BO3)2.
Use of Strain Energy Density W and Qo as Quality Indices to Study the Effect of Hipping on Cast Aluminium Alloy 354 under Different Aging Conditions
Authors: Babu G. Dinesh , Sibal Prateek , Rao M. Nageswara
Published: June 2014

Cast aluminium alloy 354 has become an important industrial material owing to its excellent mechanical properties and good castability. It finds widespread use in the manufacture of compressor wheel castings. Castings have been studied since long and different approaches have been attempted to improve their quality. One such approach is Hot Iso-static Pressing (Hipping). This paper studies the effect of Hipping on the strength, ductility, strain energy density W and quality rating Qo of the alloy 354. The study shows that Hipped samples have better % elongation to fracture, higher W and Qo values as compared to non-Hipped samples. This behavior is consistent across different aging conditions of the alloy. Hipping also results in a reduction in scatter of ultimate tensile strength of 354, thus making it valuable to industries that demand high material consistency.
Study of Bond Behavior between Concrete and Steel Bars Based on New Beam Specimens
Authors: Lin Hong Wei , Zhao Yu Xi
Published: June 2014

Traditional experiment studies on bond behavior between concrete and steel bars (corroded steel bars, FRP bars) are based on concentric pullout specimens. However, the bond behavior of concentric pullout specimens is different from that of RC elements in many aspects. This paper proposed a new kind of beam specimens based on previous researches. Based on the new specimens, this paper investigated the effects of stirrups on the bond behavior between concrete and steel bars. The test results showed that the effects of stirrups on bond behavior were more apparent after bond failure.
The Introduction of Micro-Pile in Building Heightening and Transformation
Authors: Zhang Su Juan
Published: June 2014

Micro-pile is mainly introduced in this paper the construction technology and its main connections with superstructure in building heightening and transformation. The bearing capacity of micro-pile should be calculated follow the traditional method of pile foundation,and it should be improved to distinguish the different soil conditions.
Effect of Co-Doped Steelmaking Slag and Fly Ash on Performance of Permeable Concrete
Authors: Li Zi Cheng , Zhang Ai Ju , Zhou Min Juan , Qiu Shu Heng
Published: June 2014

The effect of steelmaking slag and fly ash as multi additives on permeability and mechanical properties of permeable concrete was investigated. The results show that multi binder with fly ash, steelmaking slag and cement has a significant impact on the permeability and compressive strength of permeable concrete specimen. When the co-doped admixture is added with fly ash (15 wt.% ) and steelmaking slag (10 wt.%), good mechanical properties and high permeability coefficient were obtained. Fly ash and steelmaking slag has a micro-aggregate filling effect on the concrete interface.
Experimental Study on Ratio of Bending-Compressive Strength of the Crumb Rubber Concrete Modified by Latex
Authors: Li Wei , Huang Zhen , Wang Xiao Chu , Zang Zi Sheng
Published: June 2014

The cementitiousness between rubber particles and cement-based material could be raised because of the surface modification of rubber,thus enhance the mechanical property of crumb rubber concrete and improve the interface effect of rubber particles.We had researched the change regulation about the ratio of bending-compressive strength of the crumb rubber concrete modified by latex,the concrete with various quantity of rubber,under the condition dosage of latex is 0.5% of cement quality.The result of experimental prove that,compressive strength, splitting tensile and flexural strength could be enhanced because of latex injecting,and the ratio of bending-compressive strength could be enhanced at the same time.
Diffusion Bonding of Commercially Pure Titanium to Q235B Using Copper as Interlayer
Authors: Liu Jia Geng , Han Jing Tao , Liu Jing , Ji Shuai
Published: June 2014

The diffusion bonding process of commercially pure titanium to Q235B is achieved using copper as interlayer. The microstructure, component distribution and phase formation at the interface is analyzed by the use of microscope, SEM and XRD, the mechanical property is also investigated through the shear test. There is a good bond at the interface from 900 to 1000°C, no big cracks and voids, Q235B/Cu interface is straight, and Cu/TA1 interface shows waviness. With the increase of diffusion temperature from 900 to 1000°C, the shear strength increases first ,and then drops, however, with the increase of holding time from 30 to 60 minutes, the shear strength drops all the time, the maximum shear strength is 80MPa at 950°C for holding time of 30 minutes.
Compound and Engineering Application of Fiber Reinforced Concrete with Low Shrinkage
Authors: Li Jian Fen , Li Shu Jin
Published: June 2014

On the basis of experimental research about PVA fiber concrete, combined with the technology measures such as expansive belt, construction quality monitoring, the jointless design and construction is successfully carried out for an industry tank. The water storage test results showed that impervious performances can meet the requirements of specification and achieved desired effects.
Study on CO2 Adsorption of Sepiolite Modified by Silane Coupling
Authors: Zhang Hua Li , Wu Han Jun , Pan Zhi Quan , Jiang Shu Hang
Published: June 2014

The natural sepiolite as the main raw material, removing the quartz, calcium carbonate and other impurities through purification. The purified sepiolite was roasting activation pretreatment, in order to enhance surface porosity and reaction activity, and then was made of sepiolite composite by modifying through the use of silane coupling agent. The samples were characterized by XRD、SEM、BET、FT-IR and other chemical analysis method. The weight percentage of CO2 which were adsorbed by the modified sepiolite increased from 4% to 14.61%.
The Technique Study on Silicon Brass Recrystallization Annealing Aided by Electric Pulse Treatment
Authors: Tukur S. A , Wang Jian Zhong , Qi Jin Gang , Zhao Zou Fu , Wang Jia Yi
Published: June 2014

An online production technique was designed and automated for control system of the three-phase induction motor based on programmable logic controller (PLC) technology and a simplified system was used to carry out a material testing. The microstructure morphologies were observed by the optical microscopy and hardness test. The results have shown that electric pulse treatment significantly accelerated the recrystalliazation annealing of HSi65-1.5 alloy due to the short treating time, high heating rate and accelerated nucleation and lower final dislocation density and the optimum parameters where found to be annealing at 300°C, pulse voltage of 700V, pulse frequency of 15Hz and pulse time of 120s.
Organobentonites for Controlled Release of Diazinon
Authors: Qin Yan Ping , Dai Lin Tao , Kong Zhi Jie , Wang Ya Jing , Huang Ai Min , Ma Lin
Published: June 2014

Organobentonites with dodecyltrimethylammonium chloride (DTMA) and hexadecyl trimethyl ammonium chloride (HTMA) were prepared and used as carrier of diazinon, with purpose to provide controlled release properties to the formulation containing diazinon. The structure of organobentonites was characterized by FTIR and XRD and the sorption towards diazinon was investigated, to reveal the effects of organobentonites on the release of diazinon. It was showed that organobentonites with quaternary alkylammonium were of excellent sorption capacity towards diazinon, in which hydrophobic interaction played a key roll. An enhancement of sorption could be achieved by increasing the alkyl chain length and the loading level of modifying agent. The release of diazinon was greatly reduced by organobentonites. The time taken for 50% of active ingredient to be released, T50, from organobentonites with DTMA loading of 75, 100 and 125% of the cation exchange capacity were 45.9, 40.2 and 38.0 times of the value for the formulation without organobentonites, respectively. Those for the release from organobentonites with HTMA of the same loading level were 73.2, 63.2 and 52.1 times. The difference of diazinon release may be related to the change in the structure of organobentonites and the interaction with diazinon. An increase in loading level of quaternary ammonium could produce a faster release of diazinon, while the extension of the alkyl chain slowed down the release.
Global Multiscale Finite Element Method for Flow in Fractured Media
Authors: Li Xiao Lin , Meng Guang Wei , Zhou Li Ming , Li Feng
Published: June 2014

Numerical simulation in fractured media is challenging because of the complex microstructure and the coupled fluid flow in porous and fractured media. In this paper, we have extended the global multiscale finite element method (GMsFEM) to study the fluid flow in fractured media with a dual porosity model. By using the fine-scale solution at t=0 to determine the boundary conditions of the basis function, local and nonlocal informations are reflected in the basis functions. As a result, an accurate solution can be achieved in the coarse scale. Numerical example demonstrate that the solution of GMsFEM is highly consistent with the fine-scale solution of FEM. Furthermore, GMsFEM provides a great computational efficiency.
Estimation of Failure Rate and its Applications in the Case of Zero-Failure Data
Authors: Han Ming
Published: June 2014

This paper introduces a new method, named E-Bayesian estimation method, to estimate failure rate in zero-failure data. The definition of E-Bayesian estimation of the failure rate is given, based on the definition, the formulas of E-Bayesian estimation and hierarchical Bayesian estimation of the failure rate were provided, and properties of the E-Bayesian estimation, i. e. relations between E-Bayesian estimation and hierarchical Bayesian estimation, was discussed. Calculations were performed on practical problems, showing that the proposed new method is feasible and easy to operate.
A Method Used for Mechanism’s Motion Accuracy Reliability Analysis
Authors: Li Chang , Wang Bing Chen , Han Xing , Zhang Shuang Yi
Published: June 2014

Dynamic responses of a certain system could vary with the place, environment and time of use even if the system itself did not change. Traditionally, kinematical reliability analysis of a multi-body mechanism was a hard point in the reliability field. In order to obtain a large sample data of mechanism’s transient kinetic characteristics, it needed to take lots of time, labor and finance input to acquire. It reported an effective method used for mechanism kinetic reliability analysis, with the combination of VC++ and CAE software’s second develop program, it built a parametric virtual test model for complex mechanism system. Where, it used multiplicative congruent method to program a pseudo-random number function that conformed to normal distribution to simulate the stochastic error distribution of the mechanism, which was convenient for the Monte Carlo parametric modeling to obtain large sample data and calculate the system kinetic reliability.
Failure Risk Evaluation of Security System Based on Fuzzy FTA
Authors: Qu Na , Li Zhong Hai , Cheng Nai Wei , Li Jian Wei
Published: June 2014

The reliability of security system affects the ability of the system to protect people's lives and property safety. Failure risk assessment of security system is an effective method to test the reliability of the system. The fault tree analysis method has been applied to analyze the system failure risk from the angle of each part and considering the human factors. The traditional fault tree analysis method assumes that the probability of bottom events is certain to calculate the top event probability. To obtain accurate bottom events probability is difficult, even impossible because statistical data is not sufficient and the bottom events is fuzzy in fact. Analysis of the fuzzy mathematics theory is introduced into the fault tree. The calculation provides reference for the system design and management.
Research on Intelligent Fault Diagnosis Technique of Complex Equipment
Authors: Zhu Rui , Huang Ming Ji , Ding Guo Bao , Jia Shuai
Published: June 2014

Aiming at the actual demand of complex equipment fault diagnosis, this paper made the fault intelligent diagnosis technology of a certain type of equipment as research object, analyzed the characteristics of equipment and its faults, presented four strategy to solve the problem: Circuit-decomposition, the decision tree, confirm key component using FMECA and establish model by PSPICE.And proving it by actual circuit.
Numerical Simulation Research of Optimization Design of Supporting Half-Coal Roadway in Deep Stope Working Face
Authors: Zeng Xian Tao , Wang Ning , Jiang Cong , Zhang Yun Yi , He Chang Hai
Published: June 2014

In this paper, design of roadway with stope working face Yeqing 8459 had been optimized combined with geological characteristics of the working face based on the actual measurement of ground stress and mechanical properties of coal rock of Yangquhe mine in Feng Feng mining area. Analyzing eight kinds of roadway support design scheme through numerical simulation and evaluating the supporting effect of each supporting design scheme, designating the construction guidelines ultimately.
The Three-Dimensional Similar Simulation of Stress Regular Pattern of Roof of Large Mining Height
Authors: Zeng Xiao Tao , Wang Ning , Jiang Cong , Zhang Yun Yi , Chen Gang
Published: June 2014

Based on the distribution of in-situ stress and the special conditions of the large mining height in one mining area, the author conducted the analogy stimulation test of the mine pressure behavior and the roadway deformation law. This research, mainly based on the geographical conditions of 1 to 2 coal seam of this mining area, stimulated the mine pressure behavior of the working face and the roadways, as the mining height is 5meters and 6meters. Through this analogy stimulation test, the mine pressure behavior of working face, in the mining process with large mining height, is analyzed and summarized.
Simulation Analysis and Structure Optimum Design of the High Speed Conveying Manipulator Based on ADAMS
Authors: Xue Feng Wei , Zhou Ji Ping
Published: June 2014

The conveying manipulator is an indispensable transmission system of JM31-160 automatic stamping production line, and structural characteristics of the manipulator directly affect the productivity of auto stamping production line. Using virtual prototyping technology, basing on the Multi-body dynamics theory, explored the technical line of dynamic design theory to apply on the transmission system. Reaching a conclusion the function of optimized structure is improved, and manufacturing cost brings down.
Research on Structure Damage Identification Method Based on Multi-Modal Parameters
Authors: Sun Jie
Published: June 2014

The multi-modal parameters which are composed of the curvature mode and the flexibility curvature are used to identify the damage on the base of finite element method model based on continuous beam. It has been proved that multi-mode parameters are considered as the networks inputting parameters, and the location of the structure damage can be accurately determined and the damage degree can be obtained by the neural networks. It has indicated that this neural network has a excellent identification ability with good fault tolerance and robustness.
3D Machining Process Planning Based on Machining Feature Recognition Technique
Authors: Liang Chao , Zhang Xu , Zhang Qing
Published: June 2014

In the model-based definition (MBD) scheme, activities of process planning need to be carried out in 3D environment. To realize the 3D computer-aided process planning (3D CAPP), the design solid model needs to be transferred into a representation as manufacturing features, features’ process requirement and product manufacturing information (PMI), and then the generative process planning techniques can be realized by inferring machining operations based machining feature knowledge base. A machining feature-based 3D computer-aided process planning approach is proposed for machining part. Design model is transferred into boundary representation (B-Rep). According to a machining features classification scheme, hybrid machining feature recognition technique is introduced. A part process information model is generated including machining features, feature relationship, feature’s process chain. For each recognized machining feature, a feature’s process chain is inferred from feature knowledge base, based on feature type, process requirements, dimension and tolerances, and the enterprise manufacturing resources. Process intermediate models corresponding to each process operation are generated automatically by applying geometry local modification operations. The complete process plan is generated and documented with detailed operation information and 3D process intermediate models. A 3D CAPP tool is developed on ACIS/HOOPS, with industrial cases to demonstrate the feasibility and applicability of proposed method.
Hydraulic Cylinder Boring Quality Range Analysis Based on Orthogonal Test
Authors: Wang Xiao Zeng , Yang Jiu Hong
Published: June 2014

The reliability of the hydraulic cylinder influences the safe working of the mechanical equipment. So, there are very high technical requirements and machining precision for the hydraulic cylinder. The manufacture deviation of the bore diameter will appear in the machining process. It will influence the working performance of the hydraulic cylinder. The paper determines the influence factors of the hydraulic cylinder machining quality and the different factor level, conducts the orthogonal tests of the boring quality of the hydraulic cylinder. According to the range analysis of all test data, the following conclusions can be drawn. The best match of all kinds of factors is A3B2C2D3. The influence of cutting speed on boring the quality of the hydraulic cylinder is the largest. The influences of cutting tool type, the number of boring tool used in boring, and the feed quantity on the quality of boring are minimum.
The Design and Development of Fully Automatic Ultrasonic Hot Rig
Authors: Zhou Jun Rong , Cui Wei Guo , Huang Hui
Published: June 2014

There are something wrong with traditional hot rig.Such as poor efficiency,low precision,exploding diamond easily,rickety hotting diamond and so on.Introduced operational principle of mechanism,electronical control of ultrasonic and pneumatic principle.The machine use only one stepper motor to realized inhaling diamond linkage’s swinging and location,and then the structure is simple and reliable.
Control and Design of Intelligent Robot Arm
Authors: Jia Hong Li , Yu Miao , Chen Pan Jie , Dong De Fa
Published: June 2014

With development of technology, the robot arm is used widely in different fields; it creates great benefits for companies, thereby, it is extremely important to design robot arm. Purpose of this project is that inserting four washers and tightens four nuts on bolts. This task is analyzed by four aspects in the report. Firstly, the task can be analyzed based on different method. Rotation of five axes and prismatic of one axes can be selected. Secondly, the positions of the axes are fixed. Thirdly, the processing of the project is simulated using Flash. Finally, the matrix can obtained using Matlab.
Optimal Locomotive Parameters of Four-Legged Bio-Robot by Minimizing Energy Consumption
Authors: Park Sung Ho , Hong Dong Pyo
Published: June 2014

Four-Legged walking robot is mechanically modeled by copying mammals, which have 13 links and 12 joints. But mechanical models are more on technical rather than on biological concepts, which yield unstable locomotion with low speed. Advanced biological locomotive phenomena and their structural characteristics are applied to the mechanical model and simulated for the one cycle. Torques at joints are calculated and finally converted to total consumed energy. Variables, specifying structure and locomotion, are applied to the simulation as a time function, and the optimal variables which minimize energy expenditure are derived which can be directly applied to the Quadruped locomotion.
Optimization of the Rotor Chuck Structure Based on Finite Element Analysis
Authors: Guo Xiu Hua , Chen Xiang Lin
Published: June 2014

Chuck for rotor is prone to fracture when working under axial tensile force of pulsation cycle. The maximum stress position of the chuck calculated by finite element analysis coincides with the actual fracture location, which confirms that chuck slotted root is the weakest part of the rotor. The structure optimization of part is proposed based on the results of the original structural analysis. It is found that the maximum stress of the chunk of rotor reduced by 56.59% after optimization based on the calculation of the finite element analysis. The strength of the optimized slotted roots of the chuck rotor is improved greatly and the service life is extended, which solved a technical problem for the enterprise.
Modeling and Co-Simulation of Stop and Go Cruise Control System
Authors: Xiao Di , Li Li , Li Ping Fei , Su Jing
Published: June 2014

Vehicle stop and go frequently can cause driver fatigue, even traffic accidents. In order to mitigate driver fatigue and the risk of rear-end collision accidents, a set of hierarchical vehicle stop and go cruise control system(S&G) was established. A vehicle dynamics model was created with Carsim, the determination of safety distance was based on headway method. Then upper controller and lower controller were designed separately based on optimal control and fuzzy PID control principle. Finally, a simulation loop was built in Simulink. Through a co-simulation conducted under typical S&G driving condition, got speed change curves,acceleration change curves and relative distance change curves of host vehicle while following the target vehicle. The results show that the S&G system designed can make host vehicle well follow the speed change of leading vehicle while keeping an appropriate safety distance, stop and go automatically, reduce driver fatigue and improve vehicle active safety.