bluuebunny/crossref_metadata_2025 huggingface dataset:
Diffusion Dynamics of HAc from Cellulose Acetate Filament during Coagulation Process
Authors: Li Jiao , Song Jun , Cao Jian Hua , Wang Lin Fu , Zhang Qing Lan
Published: November 2013

During dry-wet spinning, diffusion is very important for the formation and mechanical property of fibers. In this paper, the diffusion dynamics of acetic acid (HAc) and water (H2O) during coagulation process of cellulose acetate filament were investigated in detail. The diffusion coefficients of HAc and H2O were calculated based on the Ficks first law of diffusion according to the experimental data. Several factors which affect the coagulation process including concentration and temperature of coagulation bath were discussed respectively. The result showed that the diffusion coefficients of HAc and H2O increased with the increasing coagulation temperature and decreased with the increasing coagulation bath concentration.
Microstructure Evolution of Hypereutectic Al-Si Alloy in Semi-Solid Compression Deformation
Authors: Wang Yun Tao , Yuan Xiao Guang , Yu Bao Yi , Huang Hong Jun
Published: November 2013

The semi-solid microstructure evolution of hypereutectic Al-20Si-3Fe-1Mn-4Cu-1Mg alloy was studied by unidirectional compression deformation experiment, at a range of deformation temperature of 833K~873K and a range of strain rate of 0.1s-1~0.001s-1. The results showed that the microstructure of the reheating alloy was more spherical and fine than the microstructure of as-cast, the alloy was a positive strain rate sensitive material that the flow stress was decreased with increasing in deformation temperature and it was increased with increasing in strain rate. The mechanical properties of the alloy were hardly improved when the deformation temperature was too high to fracture the thick phase of the alloy.The lower strain rate was not only reducing the productivity but also reducing the plastic deformation. The microstructure of the alloy which the thick phase was broken fundamentally and the grain became further refinement can be obtained at 833K~853K, and at 0.1s-1~0.01s-1.It can be done that reducing the plastic deformation resistance and strengthening the fabrication procedure of the alloy.
Study on Bamboo Culm Used for Structure Axial Compression Performance Numerical Simulation
Authors: Zhao Zhang Rong , Fu Wan Si , Han Wang , Zhou Jin Bo
Published: November 2013

Bamboo culms as a structural building material have many advantages, are the ideal material for the future green building, and are increasingly brought to the attention of the industry. If it is widely recognized and adopted by structure and architecture, the complete bamboo culms performance parameters, testing methods, application of standards, and digital design and manufacturing methods are needed. Bamboo culms as a new type of building support, axial compression performance is directly related to the safety of the bamboo-framed buildings. This paper aims to study the structural properties of the bamboo culms compression test methods, and compression failure was simulated. Simulation results and experimental results are consistent. The model proposed in the work provides technical support for the structure of bamboo.
Effects of Tourmaline Powder on Growth Activity of Marine Bacteria and Diatoms
Authors: Qi Yu Hong , Zhang Zhan Ping , Li Wen Long
Published: November 2013

The effect of tourmaline on growth activity of marine bacterium and the diatomNavicula perminutawas investigated by testing number of bacteria in fresh nature seawater and chlorophyll a of the diatom suspension. The concentrations of magnesium, iron and lithia tourmaline powders were controlled from 1 g/L to 15 g/L. The results showed that bacterial cells in seawater and chlorophyll a of diatom solution were reduced with increase of tourmaline powder. Tourmaline could inhibit obviously the growth activity of marine bacteria and diatom. The inhibiting effect of lithia tourmaline is strongest, that of magnesium stronger, and that of iron weakest. Whatever the tourmaline type, the higher the negative ion release rate is, the stronger is the inhibiting effect of tourmaline on growth activity of marine bacteria and diatom. Tourmaline mineral materials are expected to use as an additive to antifouling coatings from this work.
Molecular Simulation Study Conformation and Energy of Polyaniline/Graphite Composites
Authors: Guo Rui Bin , Mo Zun Li , Zhu Xiao Bo , Yang Sheng Rong
Published: November 2013

Under the COMPASS (condensed-phase optimized molecular potentials for atomistic simulation studies) force field, the MD (molecular dynamics) simulation was applied to Polyaniline/ Graphite Composites. In this paper, we briefly introduced the constructive process of the composite system by means of MD simulation. The stability and mechanism of five intercalation composites were studied with microcosmic figure and variational energy under the invariable NVT ensemble. The results indicate that the area of graphite sheets is particularly important in the intercalation bonding process. It is the key to control the final product. The area selection is based on the molecular weight and volume of the intercalated organic polymer.
Study on Structure Design and Properties of Super Absorbent Copolymerized with Milk Protein Grafted Acrylic Acid
Authors: Wei Meng , Gao Bo , Xiao Yong Cong , Sui Yu Feng
Published: November 2013

Super absorbent resin(SAR) is a kind of contains strong hydrophilic groups such as carboxyl with certain degree of water swelling type crosslinking polymer. Because it can absorb their hundreds and even thousands of times of water, which are widely used in health product 、dewatering of coal seam and many other fields [1].At present ， there is few study on water absorption performance of protein grafted acrylic acid absorbent resin. Therefore, this article selects the pure milk of JiaBao dairy company production , conducted a series of graft reaction, studied the influence factors such as the initiator, cross-linking agent, neutralization degree ,consumption of milk and PH sensitivity.
The Complexation of Calix[6]Arene Sulfoxide Derivative with Uranium
Authors: Pi Yin An , Wang Jing Song , Guo Qing Wei , Mo Hui Yan , Xia Yong Feng , Zou Xiao Liang
Published: November 2013

Calix[6]arene carbon chain alkyl sulfoxide derivative have been successfully synthesized. IR spectra confirmed the introduction of sulfoxide group on calix[6]arene. UV spectra indicated that calix[6]arene sulfoxide derivative has a high complexation of uranium. The coordination ratio between the calix[6]arene sulfoxide derivative with uranium is 3:2, which was determined by Job’s method. Extraction experiments showed that the extraction efficiency of uranium is able to achieve 73.8%, which suggested the potential application of calix[6]arene sulfoxide derivative as an excellent uranium extraction agent.
The Kinetics Studies for the Adsorption of Furadan from Aqueous Solution by Orange Peel
Authors: Xu Guang Fu , Shen Zhao Xi , Guo Rui Xin
Published: November 2013

As an agricultural waste available in large quantity in China, Orange peel was utilized as low-cost adsorbent to remove furadan from aqueous solution by adsorption. Pseudo-first-order, second-order models and intraparticle diffusion model were applied to analyze experimental data and thus elucidated the kinetic adsorption process. The high values of correlation coefficients showed the data conformed well to the pseudo-first-order rate kinetic model over the initial stage of the adsorption processes. The plots were not linear over the whole time range, implying that more than one process affected the adsorption: the first one representing surface adsorption at the beginning of the reaction and the second one was the intraparticle diffusion at the end of the reaction. The results in this study indicated that orange peel was an attractive candidate for removing furadan from the aqueous solution.
Progress of the Current Interface Research on Carbon Nanotubes Reinforced Aluminum-Matrix Composites
Authors: Wu Chun , Ma Wen Xin , Chen Ya Ping , Li Ying , Chen Yan , Li Jing
Published: November 2013

The carbon nanotubes with its stable structure, excellent mechanical properties, become the ideal enhancement phase of composite materials. The enhancement effect is affected by various factors, interface is one of the key factors determine its enhancement effect, also is the research focus of metal matrix composites. Briefly introduced carbon nanotubes reinforced aluminum matrix (CNTs/Al) composite material interface bonding mechanism and interface effect on the properties of composite materials, thermal expansion coefficient and preparation methods were reviewed, purity of carbon nanotubes and other factors impact on CNTs/Alcomposites interface, and puts forward the way to improve interface.
Half-Metallic and Optical Properties of Cu and Cr Codoped AlN
Authors: Fan Yu Qin , Yao Xue
Published: November 2013

The Half-metallic and optical properties of wurtzite Cu and Cr codoped AlN were investigated by first-principles calculation based on density functional theory (DFT) using the generalized gradient approximation (GGA) for the exchange-correlation potential. It is shown that the Cu and Cr codoped AlN is a typical half-metallic material at the equilibrium lattice constant. As a p-type semiconductor, there exhibits higher hole concentration in Cu and Cr codoped AlN comparing with Cu doped AlN or Cr doped AlN, which indicates a significant increase in TC. This result suggests that it is possible to achieve high TC materials by Cu and Cr codoped AlN. In addition, the band gap of Cu and Cr codoped AlN is reduced and the absorption ability to ultraviolet light is expanded obviously, a noticeable red-shift of the absorption spectra edge is observed in the Cu and Cr codoped system and two new absorption peaks appear at around 28 nm and 225 nm.
Preparation and Characterization of Double Activity Sulfate-Gallate Bagasse Xylan
Authors: Li He Ping , Yang Guan Wei , Huang Yun Yan , Yuan Jin Wei
Published: November 2013

The objective of this research was to introduce another kind of anti-biological activitiy group to xylan sulfate for improve performance in anti-biological activitiy. A novel double activity sulfate-gallate bagasse xylan was prepared by using bagasse xylan as raw material, sodium nitrilotriacetic sulfonate and gallic acid as esterifying agents. The structure of product was characterized by FT-IR and SEM. The results show that the bagasse xylan was modified successfully, and the final product is a novel double activity sulfate-gallate bagasse xylan.
Effect and its Mechanisms of Hydrated Lime on Water Stability of Hot Asphalt Mixture
Authors: Yang Wen Feng
Published: November 2013

The mechanism that hydrated lime can improve water stability of asphalt mixture was analyzed through contrasting the performance of hydrated lime and ordinary limestone ore filler. The test results indicated that hydrated lime can obviously improve the water stability of asphalt mixture.
Preparation Process of Green Ceramic Coating of Magnesium Alloy through Micro-Arc Oxidation
Authors: Wang Sheng , Ding Wan Wu
Published: November 2013

With the rapid development of magnesium alloys in electric industry, the more advanced requirement of decorative property is given. In recent years, Micro-arc oxidation (MAO) technique is the most favorable method in the surface treatment of magnesium alloys. In this paper, green ceramic coating was prepared on the surface of AZ91D magnesium alloy by micro-arc oxidation. The effects of electrolyte concentration, additive content, and reaction time of micro-arc oxidation on the formation of oxide ceramic coating were studied. The results show that the sample has micro-arc oxidation coloring reaction in the electrolyte added with colored salt KCr2O7 whose concentration is 1.2g/L. When the concentration of main salt Na2SiO3 is 13g/L, the concentration of KF is 12g/L, the concentration of additive sodium citrate is 1.0 g/L, and the reaction time of micro-arc oxidation is 20 minutes, smooth and dense ceramic layer of yellowish green oxide film can be generated.
Study on High Order TiO2 Nanotube Arrays and the Mechanical Properties
Authors: Long Dong Ping , Xue Jian Rong , Yan Zhi Xin
Published: November 2013

In this paper surface modification was adopted on 3 kinds of titanium alloy and TiO2 nanotubes arrays were prepared on these surfaces by anodic oxidation method.nanoindentation and nanoscratch experiments were performed to test the mechanical properties of TiO2 film, such as micro hardness and elastic modulus.Through comparing and analyzing,it is seen that,The film generated on the TC4 has better mechanical properties than the others and TC4 is better substrate for surface modification by anodic oxidation as the implanted materials.
Study of an Inorganic Ion Exchanger LiMn1.25O3
Authors: Jiang Jin He
Published: November 2013

[LiMn1.25O3] was prepared by a solid state reaction crystallization method. And it was a spinel-type metal compound. The solid state reaction with this material was investigation by X-ray, saturation capacity of exchange, and Kd measurement. The results showed that the Li+ extraction/insertion be progressed mainly by an ion-exchange mechanism. The acid treated samples had an ion exchange capacity of 4.0mmol/g for Li+.
Springback Experimental Research of Advanced High-Strength Steel
Authors: Ke Jun Yi , Liu Yu Qi , Li Gui , Du Ting
Published: November 2013

Springback is one of the major problems of high strength steel.Based on the NUMISHEET’96 S_Rail standard examination questions,using the characteristics of the servo press 200T,the blank holder force,different pressure holding time and the holding times of advanced high strength steel DP280-440, DP340-590, DP400-780 are studied. By changing one of the three impact factors ,three group experiments are carried out.The experimental results show that the springback can change evidently with the increasing of the blank holder force and the holding times,but the holding time has little influence on the springback.What’s more,the springback angle of DP400-780 is the biggest ,proving the higher the yield stress,the bigger the springback angle.Therefore, in the stamping of advanced high strength steel, increasing the blank holder force and holding times are effective methods to solve the springback.
Nd,Yb:YAG Laser Crystal Production and its Property
Authors: Zhang Xue Jian , Li Chun , Lin Hai , Li Qin Lin , Liu Jing He
Published: November 2013

To produce Nd, of Yb: YAG laser crystal by use of medium frequency induction heating Czochralski method.Taking advantage of the XRD, absorption spectra and fluorescence spectra on the crystal of the phase structure of and spectral to analyze the performance of structureshows that: Nd, Yb: YAG crystals belong to the cubic crystal system with the lattice parameters a = 1.2021 nm. There is a strong absorption in the 808nm but under the common temperature Nd, Yb: YAG crystal fluorescence spectra of the strongest fluorescence emission peak at 1030nm, attributable to the Yb3 +ion2F5/22F7/2level transition
Effect of Interlayers on the Structure and Properties of TiAlSiN Coatings Deposited on High-Speed Steel Substrate
Authors: Du Hao , Zhao Hai Bo , Xiong Ji , Wang Lin Lin , Xian Guang
Published: November 2013

TiAlSiN coatings with Ti or Cr interlayers were deposited on high-speed steel using magnetron sputtering methods. The structure, crystal morphology and mechanical properties were investigated systematically. The results show that (200) is the dominant preferred orientation in Ti/TiAlSiN coating, while (111) become the predominant orientation of the deposited Cr/TiAlSiN coating, which is related to the surface energy. Due to the changes of the coating growth style, the Cr/TiAlSiN coating shows columnar crystals morphology. The Ti/TiAlSiN coating performs better adhesion and H/E ratio, which is proved to have better wear resistance. But the specimens with Cr interlayer have better hardness and elastic modulus, which is due to the growth style of the crystals.
Effect of Microstructure on Mechanical Properties of High Carbon Steel Wire Rod
Authors: Wang Bo , Xiang Song , Liang Yu
Published: November 2013

In this study, the effect of pearlite microstructure on mechanical properties has been analyzed.The high carbon steel wire rods were treated by traditional salt-bath isothermal heat treatment and a new process, respectively. The microstructures and mechanical properties of the wire rods were tested with SEM and Instron 8501. The results shown that with the decrease of the isothermal holding temperature, the pearlite interlamellar spacing and pearlite colony size decreased and the mechanical properties of the wire rod increased. Especially the interlamellar spacing and pearlite colony size were decreased by new heat treatment observably. With the new treatment, the reductions of area increase.
Effect of Cold Spray Processes on Friction Stir Welded Microstructures of AZ31 Magnesium Alloys
Authors: Zhang Heng Yu , Wang Shan Lin , Xing Li , Yang Cheng Gang
Published: November 2013

In order to improve corrosion resistance of friction stir welds of Mg alloy, Al coatings were fabricated by cold spraying on Mg alloy substrate. The microstructure and microhardness of friction stir weld and coatings are investigated with optical microscope and hardness machine. The results indicate that Al coatings present a smooth surface, low porosity and well bonding with substrate. The grains size of friction stir welds increase as substrate speed decrease or powder feeder wheel speed increase, while the microhardness decrease since residual stress in coatings and substrate reduces. The experimental results demonstrate that Al coatings fabricated by cold spraying can provide potential protection for as cast friction stir welds of AZ31 Mg alloy.
Ceramic Powder (Silicon Carbide) - Monitoring and Influencing Process its Production
Authors: Orlovský Imrich , Hatala Michal , Duplák Ján
Published: November 2013

The paper describes research into the production of ceramic powder. Ceramic powder or ceramic granulate is the product that arises in spray drying emulsion. In our case was investigated granules - Silicon carbide (SiC). Silicon carbide is one of the most used materials in engineering technology. The essence of the research was to create a mathematical model of the drying process and identify the parameters influencing drying. Mathematical model was used to create balance equations, from which it was expressed parameter - mensural granulate moisture u2. Endpoint was the absolute humidity of dry gas to exit the furnace Y2. Based on the measured and calculated values was created graph absolute humidity drying gas furnace outputs for mensural material moisture output furnace.
The Dynamic Simulation of Engine Slider-Crank Mechanism Based on ANSYS and ADAMS
Authors: Ni Li , Huang Ya Yu , Zhou Chong Kai
Published: November 2013

Establishing bias and central entity model of slider-crank mechanism in this paper, then the bias model is imported into the ADAMS for kinematics simulation, and we can get the sliders law of motion. Then using ANSYS and ADAMS jointly to establish the multiple rigid body and the coupled model of slider-crank mechanism, and carrying on kinematics and dynamics simulation analysis to compare the two simulation results. Through build simulation of the coupled model with UG, ANSYS and ADAMS, the result of this calculation is better to reflect the true movement of the mechanism.
A Calibration Approach for the Parallel Kinematics Machines Tools Based on Error Sensitivity Analysis
Authors: Shi Yong , Liu Wen Tao
Published: November 2013

In order to identify the geometrical parameters of parallel kinematics machines tools (PKM), a new parameters identification method is presented. The identification method is proposed based on a pose discrepancy model, which is deduced from the error between the nominal and measurement relative distance of two different spatial locations of the moving platform. In the identification method, an error sensitivity matrix, which expresses the sensitivity between the pose error and geometrical structural parameters error of PKM, can be created with numerical methods. The results of different numerical methods are analyzed. A measurement method to get the precise lengths of legs is presented, which decrease the number of identified parameters. In an experiment, the error of PKM is reduced from 6.71mm to 1.144mm. Therefore, the identification method is verified effective and feasible.
Resonance Reliability Sensitivity Analysis for Random Cam Mechanism System
Authors: Si Xin Xin , Zhang Rui Jun , Zhang Lu Lu
Published: November 2013

Targeting at realizing analysis of resonance reliability sensitivity for cam mechanism system, considering the uncertainty of the design parameters, the performance function of the resonance reliability of the cam mechanism is established based on stability criterion of vibration. The perturbation method is employed to calculate the resonance reliability of cam mechanism. Combined with the sensitivity technology, the effects of random variables on occurring resonance failure of cam mechanism system were discussed. The study results can provide theoretical reference for anti-resonance design of cam mechanism system.
Mechanical Properties Analysis for Compression Equipment of Underground Lifting Compression Processing Station
Authors: Zhou Hui , Li Gang Yan , Hu Jian , Li Cong
Published: November 2013

Underground lifting compression processing station is the core equipment for domestic waste disposal. Compression equipment is the elementary equipment of underground lifting compression processing station and its mechanical properties will affect on compression effect of domestic waste. In order to analyze mechanical properties of compression equipment, the garbage curved surface shape function is established base on Eggshell theory, the load distribution of domestic waste inside compression box is studied, the density and load models of compressed domestic waste are established, and the load distribution function of compressed domestic waste for underground lifting compression processing station is deduced. Base on finite element method, the mechanical properties for compression equipment of underground lifting compression processing station is studied, which provides the basis for structure lightweight design.
Finite Element Analysis of Crystal Furnace Based on ANSYS Workbench
Authors: Yuan Bing , Liu Yun Xia , Yang Jun Liang
Published: November 2013

In this paper, the sapphire crystal furnace is taken as the object of research. Based on the finite element analysis software ANSYS Workbench, static and modal analysis of the key parts of the crystal furnace are completed, the static and dynamic characteristics of the parts are studied, and the natural frequencies and the mode shapes of the key parts are obtained. According to the analysis of each mode type of the vibration, the weaknesses of the structure are identified, which provides theory reference for the structure optimization design of crystal furnace.
Research on a Variable Degree of Freedom Luffing Mechanism, Part I
Authors: Yao Xiao Guang , Feng Yong Bao , Guo Xiao Song , Ma Chang Lin
Published: November 2013

According to the special engineering requirement, a novel luffing mechanism with variable degree of freedom is presented in this study. The mechanism is assumed to be an ideal rigid body system and the degrees of freedom in different work conditions are calculated. Then the kinematic equations of mechanism are obtained by the geometrical and motional relationship of the components; meanwhile, the dynamic equations of mechanism are deduced by the Newton's mechanical law. The analytic model can be employed for the calculation and analysis of the mechanism features; furthermore, it can be used for the design of hydraulic and electric control system.
Numerical Simulation of Free Surface Flows by Using Weakly Compressible Corrected MPS Method
Authors: Wang Hao , Jiang Qin , Zhang Chang Kuan
Published: November 2013

Mesh-free particle (Lagrangian) methods such as Moving Particle Semi-Implicit (MPS) are the latest generation of methods in the field of computational fluid dynamics where large interfacial deformations and fragmentations exist. Due to their mesh-free nature, these methods are capable of simulating any kind of boundary/interface deformation and fragmentations. In this study the weakly compressible corrected MPS (WCC-MPS) method is used to simulate dam break over a dry bed, which is a highly erosive and transient flow problem. The developed numerical model is first validated using a dry bed dam break problem by comparing with experimental data. Comparisons between the model results and experimental data showed that the developed numerical model with WCC-MPS method can well represent the dam break problems with very large free surface deformation and fragmentations.
Health Evaluation for Durability of Harbor Engineering in South China Based on AHP
Authors: Chen Zheng , Li Xi , Chen Jia Yi , Wei Yu Liu , Xu Fei , Liu Xu , Tao Bo Xiong
Published: November 2013

Considering the corrosion degree of reinforcement, the chloride penetration resistance of concrete and chloride concentration distribution in concrete, a health evaluation method for durability of harbor engineering was established by analytic hierarchy process (AHP). Analysis of a harbor in South China demonstrates that the health indicator for durability condition of existing structures can be effectively used to quantitatively health evaluation for durability of practical engineering.
A Study of a New Seat-Suspension of Commercial Vehicles Using Magneto-Rheological Dampers
Authors: Wang Ji Bai , Zhang Peng Hui , Chen Jun Jie , Chen Hao
Published: November 2013

Seat suspension is one of a most important part of a vehicle, also it significantly affects the comfortableness of cars. Compared with traditional dampers, magneto-rheological ones can achieve the condition with continuous adjustable damping force. Compared with electro-rheological fluid, magneto-rheological ones have some merits including noise defending, large damping forces and fast response etc. Based on magneto-rheological dampers, the structural parameters were calculated and characteristic test was conducted. Constant amplitude of 5mm and frequency of 1hz were applied. As the current was respectively changing, the peak of damping forces changed correspondingly. In order to figure out a model, which can illustrated the influence of damping force on current, researchers also identify the magneto-rheological dampers using support vector regression. In this paper, research related with fuzzy control of seat-suspension system has been done by using a Matlab simulation model, so as to verify the damping forces can be adjustable and it has priority on vibration attenuation.
Thermal Design Improvements on Avionic Device in Confined Space under Supersonic Conditions
Authors: Li Yang , Fu Gui Cui , Li Nan
Published: November 2013

Thermal design improvements of avionic devices in confined space under supersonic conditions are presented in this paper through a numerical studies and improvements on the heat sinks and cooling vents. The components locations are also rearranged. Thus the avionic device can operate in the confined space, and heat dissipation can be easier. Simulation results show that the cooling vents added on the surfaces of the electronic cabinet can make heat exchange more smoothly, and the high temperature zones are affected by the changing of the locations of heat sinks obviously. The design rules and guidelines are proposed to improve thermal design. The design and simulation results can be used as the reference for the thermal design of other avionic devices in the similar style.
Kinematics of a New 14 DOF Humanoid Biped Robot
Authors: Chen Lu Min , Wang Fan
Published: November 2013

This paper proposes a novel architecture for a biped robot with six DOFs per leg and an active toe DOF (Degrees of Freedom). The arrangement of three successive DOFs paralleled to each other makes its inverse kinematics simple and decoupled by omitting one DOF which is unnecessary when walking. And this work presents close equations for the forward and inverse kinematics. The results can be used in the kinematic control study of the robot.
Influence of Port Plate Closed-Compression Angle on the Vibration and Noise of a Water Hydraulic Piston Pump
Authors: He Xiao Feng , Huang Xing , Deng Ben , Zhao Lan Hao
Published: November 2013

Fluid-borne noise in piston pump is an important issue that has not been solved well until now. To reduce the vibration and noise of a water hydraulic piston pump, a port plate with a closed-compression angle and a silencing groove was designed for the pre-compression process. Three types of grooves were selected as the silencing structures and investigated in this paper. Through multi-objective optimization based on genetic algorithm, it is found that the port plate with the combination of a closed-compression angle and a silencing groove has better silencing effect than that without a closed-compression angle, due to its ability of simultaneously balancing the pressure gradient in the pre-compression process and the output flow pulsation of the pump. In this case, U-shaped groove with the angle is superior to the other two types in reducing the pump noise. This work presents an effective method for solving the fluid-borne noise of hydraulic piston pump.
Element Bearing Ratio Based Shakedown Analysis for Branch Pipe
Authors: Zhang Yang , Zhang Wei , Qi Yi He , Wang Jian
Published: November 2013

Shakedown analysis is important for branch pipe because it is often damaged under various water pressure. In this paper, an element bearing ratio (EBR) based shakedown analysis method is employed for shakedown analysis of branch pipe. The EBR is used to replace the stress term in classical optimization problem in the procedure, and series of residual EBR fields can be generated by the D-value of the elastic-plastic EBR fields and the elastic EBR fields at every incremental loading step. The shakedown load is determined by performing an incremental non-linear static analysis when the yield criterion is arrived either by the elastic-plastic EBR fields or residual EBR fields. By introducing the EBR, the proposed procedure can be easily used to shakedown analysis of branch pipe with multi-material and complicated configuration. Numerical examples validate the method and demonstrate its performance.
Modal Analysis and Fault Diagnosis of Dynamic Machine Foundation under Ambient Excitation
Authors: Liu Jian Jun , Xiao Ren Cheng , Xie Fei Yue , Liu Wei
Published: November 2013

This paper introduces the modal parameter identification method of a reinforced concrete block foundation under ambient excitation. On this basis, the dynamic characteristics of a stone cutting machine foundation are obtained by modal test under different operating conditions, and test results reveal that the main cause of abnormal vibration lies in lower dynamic stiffness of the whole structure. With the comparison of dynamic response between pre-reinforcement and post-reinforcement, reinforcement effects of high pressure grouting technique and pre-stressed bolt applied to restrain foundation vibration are verified effectively.
The Analysis of Similarity Measure Function in Image Matching Algorithms
Authors: Liu Hong Liang , Song Wei , Na Peng Yu , Li Ming , Yang Pei
Published: November 2013

Similarity measure function is one of the most important factors influencing the matching precision in the field of computer vision. In this paper, a survey is done on the application frequency of distance similarity measure methods and related similarity measure methods, also the statistic characteristic is been given. The significance of Measure functions variable parameters in image matching is showed. In the real time processing aspect, drawn the conclusion that Manhattan distance measure is the fastest, Euclidean distance take second place, correlation coefficient is worst. However, in the robustness of the noise pollution aspect, correlation coefficient has the strongest robustness, then followed is Manhattan distance, Euclidean distance is worst.
A New Method of Expressing Point Model Based on Kd-Tree for Plane Area
Authors: Zhang Qian , Shan Ning , Qian Feng Chen , Ye Ya Lin
Published: November 2013

According to the space equal features of midpoint segmentation KD-tree, anisotropic quantitative method is proposed. After having used this method, the coordinate figures of sampling points in point model were quantified again; and the quantitative results have been represented as encoding of space partition methods and results in the process of constructing KD-tree. Meantime, the effectiveness that the method was used to express point model have been simulated and studied. It turned out that the quantitative method is very suitable for large flat area, because it is not only directly reduce the amount of point model geometry data, but also greatly reduce sampling points in case of keeping the numerical precision of the model geometry data unchanged, so as to further reduce the amount of point model data.
The Seawater Quality Evaluating of the Yangtze Estuary Wetland Based on BP Neural Networks
Authors: Zhang Bian Bian , Wang Yun Long
Published: November 2013

As the fast development of social economics, pollution accidents become more and more frequent. Yangtze estuary wetland is an important nature reserve. Evaluation of water quality becomes important in this area. However, evaluating water quality needs to concern many criteria such as chemical oxygen demand and content of harmful elements. Simply implement of criteria can cause bad results. This paper use Back propagation (BP) neural network to evaluate seawater quality of Chinese sturgeon reserve of the Yangtze estuary wetland in Spawning season successfully and calculate the quantities of floating animals and plants. The analysis also set up good mechanism of seawater quality evaluation.
Design and Practice Research of Sports Injury Network Consulting System
Authors: Liang Jian Xun , Zhang Bing
Published: November 2013

According to sports injuries knowledge and theory,combine module theory and Internet technology designed sports injuries network consultation system.This paper makes explanation on design ideas,technology crucial,module and function design,working example of the system.This system can appraisal sports injuries,give treating plan,exercise and rehabilitation prescription,and provide Internet platform for sports injuries treating and counseling of students and teachers.So the system has important practice and promotion values.
Research of Dispersant Quantity in each Stage of Grinding Calcium Carbonate
Authors: Chen De Wei , Ge Xiao Ling , Shi Quen Tin , Tian Yu
Published: November 2013

By using a surface treatment agent on the surface of calcium carbonate, discussed the variation of the specific surface area of the calcium carbonate during the grinding process, determined the added amount and added time of the dispersing agent, and researched on the grinding effect. According to the changes about the specific surface area of the grinding calcium carbonate particles, compared with the different effects that added the uniform dispersant and added the corresponding needs dispersant, had the particle size relationship followed the change of the specific surface area, reach to the purpose that refine the particle size and get a narrower particle size distribution.
Design of Smart Home Management System Based on GSM and Zigbee
Authors: Wang Jian Min , Wei Hai Bo
Published: November 2013

The design is mainly achieved the network that based on the new short-distance wireless instead of the traditional wired as a family of internal data and control network, and built smart home managementsystem based on embedded GSM technology . The design of smart home managementsystem consists of five parts: ARM controller platform, mobile phones, GSM wireless communication module, Zigbee Coordinator nodes, Zigbee Terminal nodes and sensor parts.
Behavior of the Spruce and Birch Wood from the Fire Safety Point of View
Authors: Kučera Petr , Lokaj Antonín , Vlček Vladimír
Published: November 2013

In the presented paper is comprehensively assessed the behavior of spruce and birch wood during fire. Samples were loaded by heat flux of 20, 35 and 50 kW/m2in apparatus according to ISO 5657. The duration of the test was up to 30 min. The behavior of the samples was evaluated on the basis of charring rate and concentrations of carbon monoxide in smoke. Charring rate was rising with increasing heat flux density and decreasing linearly with increasing density of the samples. The maximum concentration of CO in the smoke for spruce and birch wood was observed just before the end of the test, during the phase of char layer burning.
Investigation of Silicone Oil Leaching in PDMS Fouling Release Coating by Confocal Laser Scanning Microscope
Authors: Zhang Zhan Ping , Qi Yu Hong , Ba Miao , Liu Fu Jie
Published: November 2013

The silicone oil leachate in fouling release coatings has very important effect on inhabitting marine organism on ships hull and releasing of biofouling from it. For observing and testifying the leaching phenomenon of silicone oil in PMDS fouling release coating, the coating was designed and prepared consisting of 107 silicone gum, dimethyl silicone oil, tetraethylorthosilicate as crosslinked curing agent, multi-walled carbon nanotube as filler, dibutyltin dilaurate as catalyst. The confocal laser scanning microscopy (CLSM) LEXT OLS4000 was used to observe the morphology of the coating and silicone oil leachate. The results indicate that the dimethyl silicone oil can stably exist and distribute uniformly in PDMS coating. Regardless of between the coating and air or and seawater, silicone oil can leach on the interface. Silicone oil not only can leache faster on the interface between seawater and the coating than that between air and it, but also can easily form the continuous oil film because of the gravity of seawater.
A Novel Sparse Weighted Least Squares Support Vector Classifier
Authors: Yang Bo , Zhang Liang
Published: November 2013

A novel sparse weighted LSSVM classifier is proposed in this paper, which is based on Suykens weighted LSSVM. Unlike Suykens weighted LSSVM, the proposed weighted method is more suitable for classification. The distance between sample and classification border is used as the sample importance measure in our weighted method. Based on this importance measure, a new weight calculating function, using which can adjust the sparseness of weight, is designed. In order to solve the imbalance problem, a kind of normalization weights calculating method is proposed. Finally, the proposed method is used on digit recognition. Comparative experiment results show that the proposed sparse weighted LSSVM can improve the recognition correct rate effectively.
Empirical Research on Business Intelligence Success
Authors: Kokin Sergey , Wang Tien An
Published: November 2013

The present paper is a research on problems of measuring Business Intelligence (BI) System Success. The well-known system of Information System Success by DeLone and McLean and Business Intelligence Capabilities Framework were reviewed to develop a framework for evaluating Business Intelligence (BI) Success. We hypothesize that BI Capabilities (Data Type Quality, Data Source Quality, Flexibility, Interaction with other Systems, User Access Quality) are positively connected with BI Success. Our hypotheses are tested with survey data. The respondents are CEOs, CIOs and BI specialists of Russian-based companies. Structural equation modelling exhibits a good fit with the observed data. Our results show, that BI Capabilities have a strong influence on BI System Success. However, there is more work to be done, because some of the hypotheses are not supported. The present paper contributes theoretically to Information System Success domain by expanding research about Business Intelligence System Success.
Solving the Lower Reliability Confidence Limit of Binomial Distribution by Using Numeric Iteration Method
Authors: Wan Bo , Fu Gui Cui , Dong Yi Bing
Published: November 2013

By using numeric iteration method, the algorithm of solving the lower reliability confidence limit of binomial distribution is realized with Matlab programming techniques. A method to choose the initial value is proposed, and the initial value problem which the equation solving is sensitive to is solved. This algorithm can solve the Lower Reliability Confidence Limit of Success or Failure mechanical products of any quantity, any number of failures, at any confidence level at will. The precision of the result is higher than the look-up standard-given data, and by the method, data which cant be found in standards in projects can be supplemented.
Spillage Control Method in the Production Process of Argon Oxygen Smelting Low-Carbon Ferrochrome
Authors: Ma Hai Tao , Ma Shu Fan , Yu Huan Huan , Chen Feng
Published: November 2013

Taking the process of Argon oxygen smelting low-carbon ferrochrome as the research object using the multi-rules fuzzy control, the signal of sound intensity is divided into different segments. According to the different segments,control the oxygen flow rate, nitrogen flow rate, the height of Oxygen lance and the addition amount of foam inhibitor, complete the design of the fuzzy controller, then carries on the simulation under MATLAB.The simulation results show that in different segments, the time of the system achieve stability is different, but when the sound intensity stability in 30-50 normal range and the system adjustment time in 3-5 min is a relatively stable system and able to suppress spillage occurs quickly.
Experimental Study on Direct Shear Creep Characteristics and Long-Term Strength of Red Layer Sliding Zone Soil in Southern Hunan
Authors: Zhu Feng , Duan Zhong Yuan , Wu Zhen Yu , Wu Yu Qi , Li Tian Long , Cai Yan Da
Published: November 2013

The creep characteristics of red layer sliding soil under the condition of different vertical loads and water contents were studied through a series of direct shear creep tests. Tests results showed that the water infiltrated to the sliding zone along the fissure of red layer sliding belt due to the crush of red layer sliding rock, leading to softening of sliding zone and acceleration of shear creep. When the shear stress reached the limit of long-term shear strength, sliding soil was broken suddenly with small vertical loads (50 kPa and 100kPa), while the sliding soil presented as a constant acceleration creep with enough vertical loads (200 kPa and 300 kPa). The inflection point in shear stress-shear displacement isochronous curve corresponded to the long-term strength of the soil.
The Evolution and Discriminate Analysis of the SPT Discrimination Methods in Code of Seismic Design of Building in China
Authors: Zhao Qian Yu , Sun Rui , Li Yu Run
Published: November 2013

By collecting the China mainland liquefied survey record, analyzed the constitution of the SPT data. Have an in-depth understanding of the SPT liquefaction discrimination model in the Code of Seismic Design of Building in China. Reviews the development and evolution of the discrimination formula in the seismic code, and analyzed the results of the methods adopted in seismic codes of different versions by liquefaction survey data in mainland China, then discuss the reliability and feasibility of the current code. Eventually provide support for the amendments to the specification liquefaction method of our country.
The Influence of Surface Active Agent on Zn Base Brazing Filler Metal Soft Solder
Authors: Xu Yuan Yuan , Yan Yan Fu , Sheng Yang Yang , Li Shuai
Published: November 2013

The wetting property of Zinc base solder was difficult, so surface active agent could improve the wettability. This paper studied the impact of surfactant OP - 10 to Zn20Sn solder soft solder physical properties and spreading performance, the results show that: when the surfactant OP - 10 content is 1 wt.%, the non-stick, corrosive, non-volatile content and stability of soft solder all meet the national standards and spreading performance is good.
Responses of Chlorophyll Fluorescence, Stomatal Conductance, and Net Photosynthesis Rates of Four Rubber (Hevea brasiliensis) Genotypes to Drought
Authors: Azhar Aidil , Sathornkich Jate , Rattanawong Ratchanee , Kasemsap Poonpipope
Published: November 2013

This experiment aimed to evaluate the leaf chlorophyll fluorescence and gas exchange response to drought conditions of young rubber plants with different scions. Buds from four genotypes of a progeny derived from crossed clones of RRIM600 x RRII105 from Nongkhai Rubber Research Center, T187, T186, T149 and T172, were grafted to RRIM 600 rootstocks. Eight-month old plants with two flushes were used in this study. Two levels of water treatment were used, drought condition (W1) and well-watered as control (W0). Leaf chlorophyll fluorescence, stomatal conductance (gs) and net photosynthesis rate (Pn) were investigated in three phases: before drought, during drought and after re-watering. Leaf gas exchange parameters were measured using Li-6400 (LiCor Inc.). Leaf chlorophyll fluorescence was measured using FluorPen FP 100 (Photon Systems Instruments). Before drought, genotype T186 had the greatest net photosynthesis rates followed by T172, T187 and T149; there was no difference in maximum quantum yield of photosystem II (Fv/Fm) and performance index on absorption basis (PIABS). Drought conditions caused reduction in stomatal conductance, net photosynthesis rates, and leaf chlorophyll fluorescence in all genotypes. In re-watering conditions, genotype T186 and T172 experienced quick recovery while the others showed partial recovery but the values of all parameters did not reach previous levels before treatment.
Processing of Thermoplastic Vulcanizates Using High Speed Intermeshing-Typed Internal Mixer: Influence of Mixing Patterns
Authors: Teppinta Wattana , Junhasavasdikul Banja , Nithi-Uthai Nattapong
Published: November 2013

Thermoplastic vulcanizates (TPVs) were produced by high speed intermeshing-type internal mixer. TPVs based on Ethylene-propylene-diene rubber (EPDM) and polypropylene (PP) with peroxide crosslink system, were used in this investigation. TPVs were prepared by different processing condition using the same TPV recipes. In this study we focus on the effect of mixing pattern on TPVs properties. From the results, tensile properties and hardness of TPVs are slightly affected by processing conditions. In the same way, compression set which relate to crosslink density in rubber phase, were not affected by processing condition as well. All TPV samples were extruded to form a strip of 1 x 50 mm rectangular cross section using single screw extruder. It was found that, the stage of adding curative shows significant influence on extrudates surface of TPVs. TPV samples produced by adding the curative at low temperature show the smoothest surface. This is because the fine dispersion of crosslinked rubber phase which confirmed by AFM.