bluuebunny/crossref_metadata_2025 huggingface dataset:
An Optimal Distribution Strategy for Energy Dissipation Damper
Authors: Chen Min , He Guo Jing , Liu Chang
Published: March 2013

A certain amount of viscous dampers are installed in the 10-storey frame structure in line with different distribution strategies, and then 2 sets of strong earthquake records and 1 set of artificial acceleration time-history curve are selected to conduct the time-history analysis under both frequently and rarely earthquakes via ETABS software. Based on the comparison of the time-history analysis results in various working cases, the ideal energy dissipation results can be obtained when the dampers are installed in the lower stories with a larger storey drift, which also help to utilize the upper space of the structure. The time-history analysis shows that the viscous dampers installed in the lower part of a building have a better effectiveness of vibration isolation than those in the upper parts, and it is no necessary to install too many dampers, for the energy dissipation effects tend to be steady when the number of dampers has been increased to a level.
Experimental Study of the Impact of Soil Particles Loss on Soil Settlement in Vacuum Dewatering
Authors: Huang Feng , Wang Gui He , Yang Yu You
Published: March 2013

Vacuum method, combined with well dewatering method, has been proved to be an effective way to solve perched water, weak aquifers water and interface residual water problems in underground construction. However, there were not enough researches on soil settlement in vacuum dewatering from soil particle loss perspective which is one of the most critical factors in vacuum dewatering. In order to research the effect of vacuum on soil settlement, two experiments were conducted. The first experiment was designed to simulate well dewatering method without vacuum. As a contrast, the other one was conducted under vacuum pressure. Then the particle size distribution curves of the soil which were obtained from the water respectively drained from the two experiments were analyzed. At the same time, the settlements of soil column were compared. The experiment result shows that the vacuum dewatering method discharges more small particles than well dewatering method, which contributes to the settlement of the soil.
Static and Dynamic Finite Element Model Updating of a Rigid Frame-Continuous Girders Bridge Based on Response Surface Method
Authors: Han Jian Ping , Luo Yong Peng
Published: March 2013

Using the static and dynamic test data simultaneously to update the finite element model can increase the available information for updating. It can overcome the disadvantages of updating based on static or dynamic test data only. In this paper, the response surface method is adopted to update the finite element model of the structure based on the static and dynamic test. Using the reasonable experiment design and regression techniques, a response surface model is formulated to approximate the relationships between the parameters and response values instead of the initial finite element model for further updating. First, a numerical example of a reinforced concrete simply supported beam is used to demonstrate the feasibility of this approach. Then, this approach is applied to update the finite element model of a prestressed reinforced concrete rigid frame-continuous girders bridge based on in-situ static and dynamic test data. Results show that this approach works well and achieve reasonable physical explanations for the updated parameters. The results from the updated model are in good agreement with the results from the in-situ measurement. The updated finite element model can accurately represent mechanical properties of the bridge and it can serve as a benchmark model for further damage detection and condition assessment of the bridge.
Grey Correlation Analysis of Influence Factors on Daily Water-Injection Rate of Each Well Group
Authors: Geng Wen Shuang
Published: March 2013

In order to determine the influence factors on daily water-injection rate of each well group, we collected actual production performance data of 65 well groups in eastern Nan 8 area, Daqing oilfield and statistically analyzed the dynamic and static parameters such as effective thickness, connected thickness, connected direction number, oil saturation, water cut and water cut rising velocity. Then we calculated the grey correlation degree between these 6 factors and daily water-injection rate by means of grey correlation analysis method. Results of the study show that, the major influence factors on daily water-injection rate are (from high degree to low degree) water cut rising velocity, oil saturation, water cut, connected direction number, effective thickness and connected thickness. This method can serve as guide for reasonable daily water-injection rate determination.
Aging and Shear Rejuvenation Behavior of Printing Ink
Authors: Ma Xiao Lin , Fan Yu Run
Published: March 2013

The aging and shear rejuvenation behavior of a commercial printing ink have been studied experimentally using creep and oscillation modes. We observed that the printing ink has typical rheological characteristics: time-dependent, reversible and shear-thinning viscosity. Meanwhile, these properties are very strongly influenced by shear history, thus employing pre-shearing to obtain a standard test state is of vital importance. After pre-shearing, the quiescent ink undergoes structural evolution, i.e., aging, including a sol-gel (liquid-solid) transition on the early stage at room temperatures, the higher the temperature, the earlier the sol-gel transition occurs. The degree of aging and shear rejuvenation can be characterized by the waiting time after pre-shearing and the stress dependence of the power-law index. Finally, we use a time-stress superposition to obtain a universal master curve which is able to describe the aging behaviors of the printing ink. This study shows that the aging processes of printing ink for different waiting times are self similar, variation of waiting time just change the time scale and elastic modulus.
Research on Oily Sludge Treatment by Solvent Extraction
Authors: Meng Yu Hua , Zhao Chao Cheng , Liu Qi You , Zhang Xiu Xia
Published: March 2013

This paper present the optimum conditions for treating oily sludge with organic solvent extraction and surfactant solutions using the single factor experiment. Firstly, selecting petroleum ether (boiling range is 60-90oC) as the organic solvent, then selecting the mixture of sodium dodecyl benzene sulfonate and alkylphenol ether(OP-10) as surfactant agent to extract residual crude oil. Results obtained through experiments, the optimum parameters of petroleum ether were that ultrasonic reaction temperature was 55 oC, ultrasonic intensity was 320W, ultrasonic extraction time was 5min, liquid/solid mass rate was 7.5, then under the optimum conditions, the residual oil rate was about 6%. While the optimum parameters of surfactant mixture were that the temperature was 55 oC, ultrasonic intensity was still 320W, ultrasonic extraction time was 10min, liquid/solid mass rate was 15, under the optimum conditions, finally the residual oil rate was only about 1%.
Applied Research of Cyclonic-Static Micro-Bubble Flotation Column on the Microfine Hematite Flotation
Authors: Wang Wei Zhi , Han Miao Miao , Yang Chun Guang
Published: March 2013

According to the situation of high grade of flotation tailings in flotation process of SiJiYing Iron Mine, static-swirl micro-bubble flotation column was used in micro-fine hematite flotation tests. Tests on operation condition, reagent condition and flotation flowsheet were done. Compared with the flotation machine test, he final result was that concentrate grade was enhanced by 2.42%, recovery increased by 6.58%, and tailings grade was reduced by 2.01%,recovery rate reduced by 3.25%.Ideal beneficiation indexes were obtained.
Comparative Research on Aging Properties of HTV Silicone Rubber via Outdoor Electric Aging and Ultraviolet Accelerated Aging
Authors: Qin Yong Xiong , Fu Jia , Yu Lan , Yang Zi Rong , Guo Wen Yi
Published: March 2013

In order to further study the aging properties of high temperature vulcanization (HTV) silicone rubber for composite insulator in the high-altitude region, tests of outdoor electric aging and ultraviolet accelerated aging have been carried out in the paper. The contact angles test, scanning electron microscopy (SEM) and fourier transform infrared spectroscopy (FTIR) were used to study the microscopic physical properties of samples after the aging tests. SEM observed that the surface flatness of samples declined, holes and particles increased on the sample surface, a large number of fillers exposed. The results of FTIR showed that Si-C bonds in the side chain in Si-O backbones were broken by ultraviolet radiation and methyl groups were oxidized, a small amount of fire retardant (Al2O3•3H2O) were decomposed, hydrophilic groups increased, all which have happened on the HTV silicone rubber after both the aging tests under the same ultraviolet radiation. The differences between the aging properties of two kinds of tests are that the aging extent of samples after outdoor electric aging was severer than that in ultraviolet accelerated aging, and the surface hydrophobicity of it after outdoor electric aging increased compared to ultraviolet accelerated aging. The aging of HTV silicone rubber for composite insulator is mainly caused by strong ultraviolet radiation in high-altitude region.
Effect of Organic Montmorillonite on the Cellular Structure and Mechanical Properties of POE/EVA/OMMT Nanocomposite Foams
Authors: Deng Fu Quan , Ma Jian Zhong , Xue Chao Hua , Duan Zhou Yang
Published: March 2013

Nanocomposite foams based-on ethylene octene copolymer (POE)/ethylene vinyl acetate (EVA) copolymer were prepared by melting of POE/EVA with organic montmorillonite (OMMT) by pressurized curing at high temperature. The cellular microstructure of the foamed samples was observed by scanning electron microscope. The effects of OMMT on the cellular structure and mechanical properties of the POE/EVA/OMMT nanocomposite foams were investigated. It was found that OMMT played an important role in affecting the microstructure. Comparing with POE/EVA foam the nanocomposite foams with the addition of 1-3 phr OMMT showed smaller cell size and the structure uniformity of foams was improved. The density of POE/EVA/OMMT nanocomposite samples was lower obviously, meanwhile the mechanical properties of the foamed samples was enhanced.
Experimental Research on Comprehensive Recovery of Iron and Titanium from the Vanadium-Titanium Magnetite Ore
Authors: Wang Wei Zhi , Meng Qing Lei , Yang Chun Guang
Published: March 2013

An experimental research on comprehensive recovery of iron and associated apatite from a low grade vanadiferous titanomagnetite ore with high phosphorus was carried out. The results showed that using the technological flowsheet of “low -intensity magnetic separation-flotation”, not only the magnetite can be effectively separated, but the associated apatite in the mineral resources can also be satisfactorily recovered. An iron concentrate with a TFe grade of 64.81% and iron recovery of 58.04% and a high-quality phosphorus concentrate of 33.50% P2O5 with a yield of 92.18% is obtained．
FEM Simulation of Weld Quality of AA6063 Aluminium Alloy Profiles during Continuous Extrusion Process with Double Feedstocks
Authors: Zhao Ying , Song Bao Yun , Pei Jiu Yang , Jia Chun Bo , Li Bing , Guo Lin Lin
Published: March 2013

In this study, a FE simulation model of the continuous extrusion process with double feedstocks is established. It is aimed to investigate the weld quality of AA6063 aluminium alloy profiles. The results show that with the height of preformed die increasing, the pressure-to-effective stress ratio (K) increases greatly and the welds can be improved. The maximum value of K reaches to 5.5. By observation the microstructure of the welding zone, the extrusion welding line does not extend to the product surface. No defects appeared on the surface of the extruded product. It is proved that the AA6063 product with good welding quality can be obtained by continuous extrusion with double feedstocks. These also provide the theoretical basis for expanding the application of the continuous extrusion process with double feedstocks.
Mineral Processing Experiment Research of Low Grade Magnetite
Authors: Nie Yi Miao , Lu Xiao Long , Dai Qi Hui , Wang Bin
Published: March 2013

Based on the phase and mineral composition research of the magnetite, stage grinding stage selecting was adopted, through which, iron concentrate was got with productivity 16.60%, 66.15% grade and 61.26% recovery. This provides basis data for the use of this kind of magnetite.
Pressure Effect on the Structural, Elastic and Electronic Behaviors of Li3Bi: Ab Initio Study
Authors: Sun Xiao Xiao
Published: March 2013

First principles calculations have been performed to investigate the elastic and electronic behaviors of Li3Bi as a function of pressure from 0 GPa to 100 GPa with a step 10 GPa. Our calculations indicate that the lattice parameters and volume of cubic Li3Bi decrease with the increasing pressure. Cubic Fm-3m structure of Li3Bi is more mechanically stable at pressures of up to 100 GPa. The calculated results of the bulk, shear, Young’s modulus, B/G ratio of Li3Bi as a function of pressure show that Li3Bi has higher bulk, shear modulus and better ductility at 0 GPa than 50 GPa. The analysis of electronic properties reveals that the covalent Bi-Li bonding plays an important role in hardness and incompressibility of Li3Bi.
Research on PET Beer Bottle Structural Parameters and it’s Strength
Authors: Yuan Wei , Xie Li Hua , Zhang Gai Mei , Liao Da Zhi , Lu Jian Dong
Published: March 2013

According to the formula of the resistance to internal pressure, the main factors of the strength of the beer bottles are analyzed. Using ANSYS finite element analysis software, PET beer bottles damaged boundary conditions are determined. PET beer bottle model is established, and have the stress analysis. The internal pressure and the bottle top pressure are applied on PET beer bottles. PET beer bottles strain is analyzed in two loads with different thickness and different bottle diameter. Thickness and bottle diameter influence of the mechanical properties of PET beer bottles are obtained. It provides a method and basis of the structure to optimize the design of PET beer bottles.
Study on New Adiabatic Multiple Layer Coating for Metal Mold
Authors: Liu Zhi Ming , Liu Yan , Wang Ping Yuan
Published: March 2013

The new adiabatic multiple coating is composed of surface coating and ground coating. The main raw material of surface coating is diatomite and that of ground coating is zircon powder. This paper separately study on the formula of the surface and ground coating. The results show that the adiabatic and other properties of composite coating are good and the coating can be used on the metal mold to cast the ferritic nodular cast iron (ferrite% ＞95%). And the using life of metal mold is improved.
Optimization of Synthesis of 2-Ethoxy-4-Nitrophenol
Authors: Hao Zhi Hui , Xiao Ke Feng , Wang Lei Lei
Published: March 2013

This paper presents the synthesis of 2-ethoxy-4-nitrophenol using three types of nitrification synthesis schemes with 2-ethoxyphenol as main reactant. The comparison of the reaction conditions, reaction time, the quantity of the reaction byproducts, yield and post-treatment of the reaction product among these three synthesis schemes is made. It concludes that Ferric nitrate is the optimal catalyst for nitrification. Finally, melting point test and infrared characterization were conducted for the products. It shows that the product contains 2-ethoxy-4-nitrophenol and the yield is 55.48%.
Detection of L-Tert-Leucine in the Enzyme-Catalyzed Reaction System
Authors: Deng Sheng , Cui Li , Ma Li Min
Published: March 2013

Direct Determination of L-Ter-Leucine in Enzyme Catalytic Reaction System by HPLC Was Studied. the Detection Were Performed on a Kromasil 700-5C18 Column Using a Eluant Containing 0.25% (NH4)H2PO4 and 100% Methanol (V((NH4)H2PO4):V(methanol)=100:5) with the Flow Rate of 0.8 Ml/min at,detection Wavelength of 205nm. there Was a Good Line Correlation between Peak Area and Contents in the Rang of 0.2-10 Mg/ml, the Correlation Coefficient Was 0.9986, the Average Recovery Was 98.88% with a Relative Stand Deviation of 0.78% (n=5). this Method Is Simple, Stable, Accurate and Reliable for the Quality Control of L–ter-Leucine.
Effect of Four Kinds of Terpene Monomers on Activities of Acetylcholinesterase in Zophobas morio Larvae
Authors: Tian Yu Nong , Ma Wei , Wei Qing Hui , Han Xu Yang , Luo Shuai , Chen Xu Ri , Qiu Ben Jun , Ma Ling
Published: March 2013

In order to study the toxicity mechanism of plant VOCs of four kinds of terpene monomers(α-terpineol,α-pinene,β-pinene,1,8-cineole), the activities of acetylcholinesterase in Zophobas morio larvae were treaded with spectrophotometer at different time (12h, 24h, 36h, 48h). The results showed that four kinds of terpene monomers (α-terpineol, β-pinene, α-pinene, 1,8-cineole) had high biological activity in Zophobas morio, which can inhibit the activity of acetylcholinesterase(AchE) effectively．
Study on Biodegradability of Wool and PLA Fibers in Natural Soil and Aqueous Medium
Authors: Sun Ying , Luo Jing , Ni An Qi , Bi Yan Yi , Yu Wei Dong
Published: March 2013

Wool, a natural keratin fiber, and polylactic acid (PLA), a so-called biodegradable man-made fiber, were assessed on their biodegradability under natural soil and aqueous medium conditions. Cotton, a natural cellulose fiber, was used as positive control. The biodegradation of the three samples were evaluated at 35°C for 42days by the time-dependent changes in weight loss, strength loss and morphology in both conditions. The experimental results indicate that biodegradation activities in natural soil was more efficient and faster than that in aqueous medium; The order of their degradation rates are: cotton>wool>PLA fiber, that implies the natural fibers are more easily degradable than man-made biodegradable PLA fiber; and the mechanical properties decreased faster than biodegradation rate.
Synthesizing of Bone Injury Discipline and Mechanics
Authors: Yang Cheng Xi , Yang Zhi An
Published: March 2013

The paper first summarizes the evolution of the differentiation and synthesizing of bone injury discipline and mechanics and then, with the application of material mechanics, mechanical vibration and dynamics in bone injury discipline, comes to the conclusion that differentiation is the prerequisite for disciplinary development and synthesizing is the inevitable trend or result of disciplinary development.
Research on Lubrication Behaviors of Nano-TiO2 in Water-Based Hot Rolling Liquid
Authors: Zhu Zuo Xin , Sun Jian Lin , Wei Hai Rui , Niu Tai Long , Zhu Ze Lang
Published: March 2013

In this paper, nano-TiO2 particles with an average size of smaller than 25 nm, were stable dispersion to water-based hot rolling liquid for steel strip under the effects of dispersant and ultrasonic. The stability of the rolling liquid with nano-TiO2 was characterized by sedimentation method. The tribological properties of the hot-rolling liquid doped with nano-TiO2 were evaluated by using a universal friction and wear tester. Besides, the lubricity of the water-based hot rolling liquid doped with nano-TiO2 for steel strip was evaluated on a hot-rolling tester by using the rolling liquid without nano-TiO2 for comparison. Results indicate that TiO2 Nano-particles as additive are stable dispersion to hot-rolling liquid with appropriate dispersant and process for more than 7 days, also have good friction-reducing, anti-wear, and cooling properties.
Research on Pollution Control Technologies of Oil Spill in River Water with Properties of Biochemical Materials
Authors: Zhao Min , Wei Bing Qian , Liu Yang
Published: March 2013

Abstract: In recent years, oil spill happens in river frequently, which has serious impact on the ecological environment and human health. So it is very important to conduct research on the pollution control technologies of oil spill in the river water. This paper analyzes the domestic and overseas existing oil spill pollution control technologies and puts forward the method combining oil recycling machine and oil dispersant to deal with the pollution caused by oil spill in Changqing Oilfield. Through the comparison, the turntable oil recycling machine and the SC-Y17 oil dispersant are finally selected. According to the experiment, we find that temperature has a great influence on the effect of oil dispersant and measures should be taken to improve the property to make it can adapt to the requirements of the low temperature environment.
The Warning Measurement System of Erythema Time with Ultra Violet Photodevice and Properties of Biological Filtration Materials
Authors: Li Bin , Liu Jin Wei , Luo Hao , Feng Chao Yu , Duan Xiao Xiao
Published: March 2013

This proposal is directed toward the development of innovative high-efficiency UV photodevice based on the wide bandgap III-nitride (GaN-based) semiconductors for reliable operation at the solar radiation action spectrum for human. This paper uses the UVM-30 photodetector to measure the UVI and the max exposure time (Erythema Time) in sun real time with a simple linear function relationship circuit, and introduces the function, performance, system configuration as well as the partial flow chart of the flowmeter.
Interaction Parameter of BaO-Bi2O3-B2O3-SiO2 Glasses
Authors: Zhang Mu , Han Xu , Yu Da Wei , Zhao Xin Yu
Published: March 2013

Interaction parameter A proposed in Yamashita-Kurosawa’s theory of dielectric constant, has been calculated for numerous binary oxide glasses on the basis of polarizability of oxide ion determined from refractive index. However, there are only a few reports on the multi-component oxide glasses system, especially BaO-Bi2O3-B2O3-SiO2 glasses system (G-BBBSO). Bismuth/barium-containing crystals have attracted much attention in application of material engineering because of their importance for the development of nonlinear optical (NLO) information processing technology. Compared to crystals, glasses have shown many advantages in the material engineering, such as easier shaping in casting procedures, low production cost and high thermal and chemical durability. Prompted by these interests in application of material engineering, we reported new data of interaction parameter of BaO-Bi2O3-B2O3-SiO2 glasses system (G-BBBSO) for the different wavelength range (480, 546.1 and 643.8 nm)
Deformation Characteristics and Load-Bearing Capacity of NO.21 Coal Seam’s Mudstone Floor in Western Henan
Authors: Wei Jing Ping , Chen Fan , Ding Zhi Hao
Published: March 2013

Through the floor specific pressure test, the floor specific pressure was obtained. The rock mass of mudstone, under the loading perpendicular to the weak plane, was in brittle-plastic failure state, and the bearing capacity of mudstone was equal to the Ⅲa grade floor. The brittle-plastic transition mechanism of the mudstone was revealed: Firstly, the more size, the more heterogeneity. The mudstone body was bigger than its rock samples, so there were more planes of weakness, which caused the macroscopic plastic deformation. Secondly, the directions of the load and the weak plane influenced the strength of the mudstone floor. During the plastic deformation, the compressive failure occurred layer by layer under the loading perpendicular to the weak planes, and the post peak load-bearing capacity of mudstone floor was decided by the layer’s strength.
Development of New Intelligent High Potential Therapeutic Apparatus with Intelligent Materials
Authors: Tong Lei , Gao Tie Dan , He Zhi Qiang
Published: March 2013

The article represents the design of new type intelligent High potential therapeutic apparatus, using Atmega1280 as controller. High potential therapeutic apparatus is a kind of potential therapeutic apparatus exerting negative high voltage electric field around the body, which is curative for shoulder pain, headache, insomnia, chronic constipation. The design reduces voltage from 220V ac to 110V ac and constitutes different circuits with relays. To get different treatment waveform, inductances of various value is used in different circuits. Generate appropriate treatment voltage with the transformer booster. In order to achieve various values of treatment voltage, circuit connects to various primary coils of local treatment transformer and systemic transformer. Simultaneously, compose the corresponding control software. Finally achieve the hardware and software design of the high potential therapeutic apparatus. Results of experiment show that a new high potential therapeutic apparatus is successfully designed. Local treatment mode and systemic treatment mode are can produce the treatment effect of the obvious through actual testing and using.
Numerical Analysis and Optimal Design Investigation on Air Duct of Tent Air-Conditioner
Authors: Wan Zhong Min , Zheng Zu Yi , Wan Jun Hua , Liu Jing , Huang Chong Qing , Wang Liang
Published: March 2013

According to the structural characteristics of tent air-conditioner, the inner flow mechanism and influence factors on aerodynamic characteristics of the air duct was investigated by using Fluent commercial CFD code. The disadvantages of original air duct were analyzed, several design options were proposed, internal flow characteristics was analyzed by numerical simulation, the optimal solution of air duct structure was fixed. The numerical results show that the air flow rate of optimal air duct run up to 125 m3/ h, increase by 18.9% compared to the original duct.
Effect of the Metal Block on the Stress Distributed in the Adhesively Bonded Single Lap Steel Joint
Authors: You Min , Song Lai Hu , Zhang Jiang Cheng , Li Mei
Published: March 2013

The effect of 4 mm long metal block bonded to the end of the overlap zone on the stress distributed in adhesively bonded single lap steel joint was investigated using elasto-plastic finite element method (FEM). The results from the numerical simulation showed that the stress is varied a little when the joints with a couple of 4 mm long metal block adhered to both ends of the over lap or with a couple of adhesive fillet. Compared to the joint without the metal block, it is advantageous of reducing the peak stress in the adhesive layer near the ends of the lap zone in adhesively bonded single lap steel joints but its effect is less than that of the joint with a couple of adhesive fillet. There is no evidential difference in the effects between the steel and aluminum block.
Application and Development on Electric Power Facilities with Vibration Isolator to Control and Minimize the Mechanical Vibration
Authors: Lu Zhi Cheng
Published: March 2013

The principle and type and design essential and application fields of vibration isolator are put forward. At the same time, the application in Great-steam Generator sets and electric power facilities of transformer with vibration isolating device is prospective.
Virtual Prototype Design of Spherical Material Vibration Grader Machine Based on ADAMS
Authors: Li Xu Rong , Wang Kun Dian
Published: March 2013

This paper completed the virtual prototype design for a spherical materials vibration grader machine in ADAMS.A dynamic simulation and analysis of the virtual prototype has been finished.The result of simulation provided a theoretical basis for the design,which is a reference for improving the design
The Comparative Analysis of Calculating the Equivalent Conicity Methods in Vehicles of Mechanical Engineering
Authors: Lin Feng Tao , Wang Yue Ming , Dong Xiao Qing
Published: March 2013

The equivalent conicity is the key indicators in the vehicles and multi-body dynamics simulation, and also in the vehicle's performance evaluation or acceptance testing. But it does not take into account the nonlinear contact influence, different reduction algorithms cause that technological exchanges and the vehicle's performance evaluation results are inconsistent and it is necessary to improve and simplify the description. Based on the overview of the parameters of the equivalent conicity, This article presents the contrast and comparative analysis of the two calculations of quasi-linear function of KLINGEL and the linear regression of the rolling radii difference function, also shows the influence of the contact nonlinearities on the wheel/rail contact geometry with the calculation of three CRH wheel/rail pairs(XP55,S1002CN and LMA) used the two methods, and also recommended that a unified algorithm should be adopted in order to lay a good foundation for engineering practice and theory research.
The Application of the Steel Materials in Large-Span Cantilever Composite Structure
Authors: Geng Nan
Published: March 2013

The characteristic of the Steel materials are high strength、light weight、high integral rigidity、high deformation capacity, So the Steel materials is suitable used to build large-span、superelevation、extra-heavy type of building. The urban planning exhibition hall of cultural activity center in Shanxi is large-span cantilever composite structure,that is SRC column and steel beam + concrete frame structure, the maximum cantilever length of fourth layer truss is 10 m.Through the top of the cantilever steel beam with its lower suspension truss and cross-section cantilever steel beam of the first floor cantilever beam realize cantilever togetherly. Realize the structure design based on Performance Analysis by using midas/gen ver8.00 to establish a rational model,. The pipe truss and tensed cable structure joint control the total displacement of glass curtain wall.
Application Analysis of Vibrating Wheel-Soil Model Based on ABAQUS
Authors: Cao Yuan Wen , Xiang Liang , Ma Li Ying , Li Ze Jun
Published: March 2013

Vibration wheel and soil model is established by a finite element analysis software ABAQUS. Simulate and analyze the vibration compaction process with different vibration force and different speed, the result showed that the finite element model is a good simulation of the vibrating compaction process. It is a theory base of vibratory roller construction technology and prediction of vibratory roller compaction effect.
Research on Performance Influence of the Coin Recognition Device by Coil Parameters Based on Mechanical Properties
Authors: Lei Gang , Yin Xia , Liu Xi Feng
Published: March 2013

Recently the coin recognizing device is mainly based on the usage of the eddy current sensor which is the key component to determine the measuring precision. Much work have been devoted to improve the precision, however, the result is not very good. The paper presents the research and experiment in mechanical properties of iron core, coil diameters, and installation to analyze the factors affecting the precision and gives the optimized design for reference. The improved solution is adopted widely in the coin telephone of HT998(3)P/T and the recognizing precision is increased by 22%.
Simulation of Hydraulic Servo System Based on Dynamic Monitoring in Mechanical Engineering
Authors: Dong Jia Dong , Gu Li Chen
Published: March 2013

Sensor system of the belt conveyor is designed, then corrective and alarm command is given. According to the signal of real-time monitoring, belt deviation state is determined, and roller axis position is adjusted in order to achieve the purpose of deviation – adjusting. Based on dynamic monitoring of the belt conveyor, corrective devices are constructed, and hydraulic servo system model is designed by Matlab software in this paper, then the stability of the system is analyzed.
Experimental Study on the Mechanical Properties of the Crumb Rubber Concrete
Authors: Li Wei , Wang Xiao Chu , Wang Jun Wei , Wang Chuan Ji
Published: March 2013

The mechanical properties of concrete with composition of scrapped rubber tyre crumb replacing part of the fine aggregates were investigated. The testing method of the mechanical properties was executed according to . Many groups of crumb rubber concrete specimens are manufactured in different kinds of size and amount of rubber chips. The powder rubber and crumb rubber were mixed into C35 plain concrete, by the volume rations of 0%, 20%, 40 %, 60%, 80% and 100% of the fine aggregates, to investigate the influence of size and amount of rubber chips on the mechanical properties. The results of test indicate: the cubic compression strength, the tensile splitting strength and the strength of rupture decreased with the increase of rubber admixture. But there are some remarkable properties which is difficult to attain on ordinary concrete, such as better cracking resistance, better deformation property, minor density and so on.
Design of Speech Signal Acquisition and Processing System
Authors: He Juan , Kang Shuai
Published: March 2013

The design of a speech signal acquisition and processing system is introduced. The collected data is analyzed and processed Using the powerful Matlab software, and this system is verified through the example.The system of mobile communication provides theoretical reference value in high quality speech communication service .
Line-of-Sight Angle Rate Reconstruction for Phased Array Strapdown Seeker
Authors: Liu Ying , Tian Wei Feng , Zhao Jian Kang , Zhu Shi Qing , Yang Ge Wen
Published: March 2013

The phased array strapdown radar seeker’s detecting information is coupled with missile attitude information. Hence, the measurement information can not be used for proportional navigation directly. The method of reconstructing inertial line of sight (LOS) rate in phased array strapdown seeker is presented using the missile-target relative motion geometric and filtering algorithm. Considering measurement noise and nonlinearity of the phased array strapdown radar guidance systems, the principle of unscented kalman filter (UKF) is introduced to estimate LOS rate. The simulation results show that the reconstruction method is correct and the extraction of LOS rate is effective.
Manufacturing Composite from Regenerated Wood Fiber and Polyethylene via Platen-Pressing Process
Authors: Zhang Zhen Tao , Sun Zhao Bin , Yang Xue Hui , Dong Yan Hua
Published: March 2013

The technology of manufacturing wood-plastic composite (WPC) using polyethylene powder (LDPE) and regenerated wood fiber was studied. The effects of board density, the amount of coupling agent, hot pressing time and temperature on product properties were determined. The results show that the optimal parameters for making WPC are the ratio of regenerated wood fiber to polyethylene 6:4, the amount of coupling agent 0%, hot pressing time 10min, hot pressing temperature 180°C, hot pressing pressure 3.0 MPa, the mass ratio of alcohol consumption to plastic 3%. The resultant WPC had a modulus of ruputre (MOR) value of 21MPa, modulus of elasticity (MOE) of 1482 MPa, internal bond strength (IB) of 1.20MPa, moisture content of 0.98%, 24h thickness swelling of 5.69% and 24h water absorption rate of 24.8%. The properties of WPC without coupling agent is close to that of products containing coupling agent.
The Energy Management Control Strategy of Hybrid Electrical Vehicle Based on Efficiency Optimal
Authors: Zhang Niao Na , Zhang Zhe , Feng Dong Jie , Cheng Zhi
Published: March 2013

In order to save fuel and reduce emission of Hybrid Electrical Vehicle (HEV), a vehicle control strategy is proposed based on the system efficiency optimal. A vehicle performance simulation model has been built on Matlab/Simulink environment. The results show that, by using this vehicle control strategy, the dynamic performance and fuel economy of the vehicle are significantly improved compared with the traditional one. Finally, The vehicle control strategy has been verified by the bench test.
Analysis of the Mechanical Property of Collapse in Shallow-Buried Loess Tunnel under Unsymmetrical Pressure
Authors: Xue Xiao Hui , Su Zhong Ming
Published: March 2013

Based on selecting a tunnel collapse under typical conditions of the shallow-buried terrain under unsymmetrical pressure, analyzing the monitoring measurement date, using the software of finite element numerical simulation, the paper simulates the tunnel excavation in lengthwise, deduces the change laws of stress in primary support, the mechanical properties and the collapse mechanism.
The Mechanical Response Analysis of the Airport Asphalt Pavement Considering Horizontal Load
Authors: Jiao Jian , Meng Shu Dong , Jiao Qiang , Li Nan
Published: March 2013

In order to research the mechanical response of asphalt pavement under horizontal load which produced by the large aircraft braking process, large-scale finite element software is used in this paper. The model of main landing gear load is established to analyze the change of principal mechanics indexes of airfield pavement when the aircraft has different landing distance. The results show that: the horizontal load has a significant influence on the normal stress of landing direction, but the influence area is concentrated in the rear of the wheel. The horizontal load has more effect on horizontal shear stress and longitudinal shear stress, while has less effect on tensile stress of surface layer bottom, tensile tress of base course bottom and transverse shear stress. The tensile stress of surface layer will increase significantly when the braking distance is less than 2000m. Meanwhile, thickening surface layer could decrease the tensile stress and increase the fatigue lifetime apparently.
Strength Analysis of Main Girder of the Roller Forks
Authors: Feng Xiao Mei , Duan Xiu Bing , Li Yu Lan , Lu Xue Cheng
Published: March 2013

A new Roller Forks is put forward. And a novel rollers mechanism is used in the forks. As the key component of the forks, the main girder’s strength is studied in detail, including its stiffness, maximum stress and the corresponding minimal safety factor. The analysis results show that the girder meets the design requirement.
The Comparison of Two Airport Rigid Pavement Load Stresses
Authors: Meng Shu Dong , Jiao Jian
Published: March 2013

Hankel integral transform and H.M.Westergaard are two common methods for solving the differential equation of elastic surface of airport rigid pavement slab. The influence of the pavement slab elastic modulus, the pavement slab thickness and the foundation reaction modulus to the two solving methods is studied in this paper. The results can be seen in the conclusion.
Preparation and Characterization of PLGA/PLLA/PDLLA Composite Fiber Membrane Loading Naringin
Authors: Wu Shuai , Li Hong , Li Qi Yan
Published: March 2013

The composite fiber membranes loading Naringin containing poly(lactide-co-glycolide), L polylactic acid and poly(DL-lactic acid) were prepared via electrostatic spinning. The composite fiber membranes were characterized via scanning electron microscope (SEM), mechanical properties test, contact angle measurement, while the release curve of naringin in vitro was developed via ultra-violet spectrum. The results showed that the fibers with smooth surfaces were in a narrow diameter range. The strength of composite fiber membranes was improved as the content of naringin increasing, while the hydrophobicity of the materials decreased. The release of naringin in vitro was sustained and steady and less initial burst release occurred in the system.
Preparation and Characterization of PMMA-Based Cements Containing Magnetic Nanoparticles for the Magnetic Hyperthermia
Authors: Tang Zheng Hai , Wang Xiao Wen , Pan Lin , Hu Yan Wen , Wu Yang , Zhang Jie Ying , Cui Shuai , Kang Ji Yao , Tang Jin Tian
Published: March 2013

Three types of polymethylmethacrylate(PMMA)-based cements containing magnetic (Fe3O4) particles were developed and their properties were evaluated. The commercial available PMMA cement (PMMAc) was used as a control material. The setting time of the cement extended while the compressive strength of the samples decreased with increasing Fe3O4 content. There was no obvious difference in peak temperature between the cements during the setting reaction. The cement with 10 wt% Fe3O4 in an alternating magnetic field (AMF) of 125 Gs and cement with 20 wt% Fe3O4 in an AMF of 100 Gs could generate enough heat for the therapeutic hyperthermia of bone metastasis.
Keratin Sponge Film Preparation and Application in Removal of Inhalable Particles
Authors: Yuan Zhuang , Zhao Xiao Xiang , Zhou Mei Hua
Published: March 2013

Keratin sponge film was prepared from feather reduction residues, and influence of glycerol content on film’s characters and removal of aerosol were investigated. With increasing glycerol content, the elongation at break, porosity and air permeability increased together with looser structure of the film, while the inhalable particles removal rate decreased. The tensile strength increased when the glycerol content was below 5%, while the glycerol content exceeded 5% decreased. The film with 5 % glycerol content showed the best mechanical character, thermostability and flexibility. The air permeability was 368 mm/s, film's removal rate of PM10, PM2.5 and PM1.0 were 98.3 %, 39.28 % and 32.97 % respectively in air speed of 1 m/s. As a material made from natural resources, it was highly affinitive and had great potential in mask manufacture.
Bioinformatics Analysis of OmpA/MotB Protein Encoded by OmpA/MotB Gene(ORF 648bp) of Riemerella anatipestifer
Authors: Pan Xu , Cheng An Chun , Wang Ming Shu , Zhu De Kang , Wang Xiao Jia
Published: March 2013

The OmpA/MotB gene from RA by our lab was sequenced. And the molecular characteristic of this gene was analyzed with bioinformatics software. The results indicated that this gene encodes an estimated 215 protein, contains the conserved domain of the OmpA-like protein. The relative molecular weight of the protein was 23.34525kDa, and there is no signal peptide and transmembrane region of the protein. One cAMP-and cGMP-dependent protein kinase phosphorylation site, six Protein kinase C phosphorylation sites, five Casein kinase II phosphorylation sites, five N-myristoylation sites and antigenic determinants were searched in the protein. Most of the total proteins were located in the Outer membrane and cytoplasmic. Phylogenetic tree of the amino acids sequences showed this gene has a close evolutionary relationship with Elizabethkingia anopheles Ag1 and Weeksella virosa DSM16922, indicating that the RA OmpA/MotB protein may have some similar functions with them. These results provided rational data to elucidate biological function and physiological features of the protein.
Isolation of a Novel Bacterium for the Efficient Biodegradation of 2-Methylisoborneol
Authors: Wu Yuan Yuan , Yan Hai , Liu Xiao Lu , Xu Qian Qian , Yin Xue Yao , Yang Ning Ning
Published: March 2013

2-Methylisoborneol (2-MIB) is one of typical odorants in potable water sources, which is hardly removed by conventional water treatment process. A large number of studies have shown it is bio-degradable, but theory of biodegradation is not explicit. In this study, a promising bacterial strain for biodegrading 2-MIB was successfully isolated from a bioreactor for the efficient biodegradation of 2-MIB and identified as Arthrobacter ureafaciens-YW with 16S rDNA sequencing and physiological analysis, which is not previously reported. 35% of 2-MIB was biodegraded in 2 d at initial 2-MIB concentration of 50 μg/L. In addition, in the presence of nicotinamide of 20 mmol/L, the rate of 2-MIB biodegradation by A. ureafaciens-YW can be increased by 5%. This study is very important in the basic research and application in the efficient removal of 2-MIB from potable water sources.
Evolution Analysis of the Circadian Clock Protein KaiB
Authors: Sen Liu , Liu Song
Published: March 2013

Regulation of daily physiological functions with approximate a 24-hour periodicity, or circadian rhythms, is a characteristic of eukaryotes. So far, cyanobacteria are only known prokaryotes reported to possess circadian rhythmicity. The circadian system in cyanobacteria comprises both a post-translational oscillator (PTO) and a transcriptional/translational feedback loop (TTFL). The PTO can be reconstituted in vitro with three purified proteins (KaiA, KaiB, and KaiC) with the existence of ATP. Phase of the nanoclockwork has been associated with the phosphorylation states of KaiC, with KaiA promoting the phosphorylation of KaiC, and KaiB de-phosphorylating KaiC. Here we studied the evolution of the KaiB protein. The result will be helpful in understanding the evolution of the circadian clock system.
Dynamic Analysis of Frontal Human Skull Using Finite Element Simulation
Authors: Marwan Shahrul Hisyam , Abdullah Abdul Halim , Mahmud Jamaluddin , Rashid Helmi
Published: March 2013

The main purpose of the present study is to develop one degree of freedom of frontal human head impact test procedure using finite element simulation. This study is to compare the results between simulation and experimental result conducted by Delye et al. To conduct this study, the process involve is to develop finite element modeling of human skull and to analyze the data analysis which investigating the impact conditions of human skull during a human head impact on the resulting total deformation and stress distribution. There were geometric preparations, selection of elements, selection of materials, application of loadings, and the specification of boundary conditions.
Synthesis and Characterization of Cholesterol-(1,2,3-triazole)-PEG via Click Chemistry
Authors: Xu Wan , Luo Bing Hong , Li Cai Rong , Yang Jing , Zhou Chang Ren
Published: March 2013

Firstly, toluenesulfonyl cholesterol was synthesized by the reaction of cholesterol and p-toluenesulfonyl chloride, and then reacted with sodium azide to obtain azido-cholesterol. Secondly, propargyl was introduced into the terminal groups of polyethylene glycol (PEG) by the reaction of PEG and bromine propargyl. Lastly, cholesterol-(1,2,3-triazole)-PEG oligomer was prepared by the reaction of the azido-cholesterol and propargyl-PEG via click chemistry using CuSO4.5H2O as a catalyst. The structures of the products were characterized by the FTIR and 1H NMR analysis.
Mechanical Properties and Bioactive Surface Modification via Alkali-Heat Treatment of Porous Titanium for Biomedical Applications
Authors: Wang Xiao Hua , Li Jin Shan , Hu Rui , Kou Hong Chao , Zhou Lian
Published: March 2013

Porous titanium with relative density from 0.4 to 0.64 was prepared by powder metallurgy. The porous structures were examined by scanning electron microscopy and phase constituents were analysed by X-ray diffraction. Mechanical properties of the porous titanium were investigated using a compressive test. To enhance the bioactivity of the alloy surface, alkali-heat treatment was used to modify the surface. Results indicate that the elastic modulus and plateau stress of the porous titanium samples both as-sintered and alkali and heat treatment decrease with decreasing relative density. And the relationship between relative yield stress and elastic modulus with relative density of porous titanium after alkali and heat treatment are agreement with that of as-sintered porous titanium. After alkali-heat treatment, a bioactive Na2Ti5O11 layer formed on the surface of the pre-treated porous titanium. A reduction in the number and severity of this bioactive deposition was observed with the decrease in relative density of porous titanium because of the increasing surface area. In a word, The mechanical properties of the porous titanium can be tailored to match those of human bone, therefore, these bioactive porous titanium have the potential to be a bioactive implant material.