bluuebunny/crossref_metadata_2025 huggingface dataset:
Study on the Radar Echo Dynamic Image Simulation
Authors: Yu Feng , Yang Xiao , Cheng Chuan
Published: January 2014

The characteristics of Dalian Maritime University, Transas and Furuno radar simulators are described. The current radar target echo simulation technologies are researched, such as radio echo modeling, radar target echo image simulation and rendering. Finally, to put forward a radar 2D simulation method, including terrene rendering, rain/snow rendering, sea rendering and target ship rendering.
A Design of Digital Imaging System Based on Underwater Laser Line-Scanning
Authors: Zhang Yu Quan , Zhu Yan Tao , Lou Bao Dong , Zhang Qi
Published: January 2014

The digital imaging technology based on underwater laser line-scanning is one of the developing and effective technologies for underwater electro-optical imaging. According to the requirements of ocean salvages, rescues and marine resources explorations, the technical features of the digital imaging system are analyzed comprehensively, the structural characteristics are discussed and the hardware components are introduced. The design gives the supports to develop the digital imaging system using underwater laser line-scanning technology and has great significance for application.
The Numerical Simulation on Diesel Particulate Filter Based on CFD Technology
Authors: Hu Guo Liang , Dong Fei , Du Yun Peng
Published: January 2014

Its simulated in this paper that the diesel particulate filter (DPF) works without regeneration in the beginning 300 seconds. In this process, the internal parameter settings of the DPF simulation was described in detail, while the simulation results was obtained by analysis. The main conclusions are: The inner flow speed showed higher in the center part and lower in the peripheral part of DPF; the flow speed decreased in the direction of inlet channel. The soot distributed more in the frontal and rear part of DPF and less in the middle part. This is because the inlet channel of DPF at a large rate so the soot accumulated more. The accumulated soot in the middle part due to the role of air migration in the channel will move to the end of the channel. And all these reasons lead to the situation that the soot distributed more in the front and rear part. Because DPF soot accumulation will affect performance, the processor of regeneration needs to take in order to ensure regeneration of soot filters.
Study of Typical Filter Material on Dust Cleaning
Authors: Qiu Qian Sheng , Liu Jing Xian , Chang De Qiang , Mao Ning , Sun Xi
Published: January 2014

filter get peoples attention increasingly as it has become the core of dust bag. In this paper, cleaning process residual resistance and peel rate of dust cleaning cycle were studied. Experimental results show that the initial resistance of the filter were close to the filters, polyester dust filter has a high cleaning strip ratio and a larger interval.
Structure Design of a Machining Center Bed Based on Topology Optimization Technique
Authors: Ma Ya Li , Gong Zhen , Ma Chao
Published: January 2014

This paper applies efficiently topology optimization technique to the conceptual design of a bed structure of machining center, which achieves for sufficient rigidity and reasonable distribution of weight of the bed. Firstly, conceptual design of the bed structure is obtained by using SIMP method under the conditions of a multi-objective optimization considering both the weighted structure compliance and the first-order natural frequency on multiple load cases and volume constraints. Subsequently, size design is employed to determine the main dimensions of the supporting plates and reinforcing ribs. During this stage an exhaustion method is identified to select suitable dimensions to optimize the structure performance. Finally, The Finite Element Analysis (FEM) is utilized for comparison of optimal and original bed structure. The FEM results indicate that the optimal design structure can reduce the mass by 6.6% with the less stiffness fluctuation and the first-order natural frequency can also improve by 7.9% compared with the original structure.
The Study of EDM TC11 Surface Discharge Mark Diameter Based on the Artificial Neural Network Modeling
Authors: Gao Ji , Wang Di , Sun Yao , Wang Shuai
Published: January 2014

The process parameters of electrical discharge machining, such as : workpiece polarity, pulse width, pulse interval, peak current, peak voltage, all have influence on TC11’s surface roughness.But general methods are difficult to determine the relationship between the process parameters and the process indicators. This article established a artificial neural network model of EDM TC11 surface discharge mark diameter which can forecast. Neural network algorithm used BP algorithm, the network structure was the 2-4-1.
Modal Analysis of Diamond Wire Cutting Machine's Bed
Authors: Jiang Zheng Feng , Gao Rui , Wang Dong , Zhang Qing , Chen Lei , Gao Xin Gang
Published: January 2014

After the design project of diamond wire cutting machine, we try to optimize the design of its main structurebed. In this paper, we shall first make three-dimensional modeling on the bed with Solidworks, and then do modal analysis with Ansys, from which we can get its five natural frequencies and vibration patterns, verify the accuracy of the finite element model. Finally, the optimization measures will be summarized.
The Full Flow Simulation of Auto Centre Pillar Reinforce Plate
Authors: Idrees Elsayed Mohamed Elsayed , Cai Yun Jun , Cai Yu Jun , Qiang Yu
Published: January 2014

A major role of automotive engineers is to improve fuel efficiency and vehicle safety. However, it is very difficult to improve both of these requirements at the same time. So they deal with the design of structural reinforcements in hopes to improve the crush strength, but minimize the weight of the automobile body. Forming simulation has been playing increasingly important role in this field to save time and cost and the accuracy of the simulation argued against the real life results. In this paper The Auto Center pillar reinforce plate is studied by finite element method, and forming process is optimized according to full flow simulation. The simulation shows that the FEM can make the tryout process better to get high success rate and shorter time.
Structural Analysis and Optimization of Combine Harvester Frame
Authors: Li Fu Qiang , Liu Shou Rong , Mao En Rong , Xie Bin , Zhang Li Xiang
Published: January 2014

Parameterized model of combine harvester frame is created using the DM module of ANSYS Workbench in this paper. Analysis on the strength and stiffness of the frame is implemented to estimate its safety and economy. According to the analysis result, optimization is made to save material appropriately. Modal analysis of the frame is proceeded to study its natural frequency and compare it with external excitation frequency.
The Inversion Analysis of the Reservoir Saturation Landslide's Permeability Coefficient
Authors: Wang Ya Jun , Wang Qi , Cao Yang Bing
Published: January 2014

Determination of sliding body saturated permeability coefficient has an important significance for groundwater dynamic field, deformation and stability of reservoir landslide. Based on in-depth analysis of landslide geological characteristics, groundwater monitoring data, rainfall and reservoir water lever in Three Gorges Reservoir, it is found that reservoir water level is the main factor which affecting the groundwater dynamic field. According to two layers of sliding body, the saturated permeability coefficient test plan of two factors and three levels has been designed. Based on saturated-unsaturated seepage finite element and the reservoir water level fluctuation curve, groundwater saturation line has obtained under different combinations of parameters. Combined with genetic algorithm, an optimal neural network model was established to describe the nonlinear relationship between the sliding body saturated permeability coefficient and borehole water level. Then based on the monitoring data of borehole water level, the saturated permeability coefficient of two layers sliding body can be gotten. Finally, with the inversion parameters, it is found that the calculating water level results and the actual level of underground water are in good agreement. Results show that the inverse thought and method is feasible and effective, which can provide reference for the similar engineering.
A Generalized Thermoelastic Diffusion Problem with Temperature-Dependent Properties
Authors: He Tian Hu , Niu Yan Bo , Shi Shuan Hu , Ma Yong Bin
Published: January 2014

The generalized thermoelastic diffusion problem with temperature-dependent properties is investigated in the context of the theory of generalized thermoelastic diffusion. The results show that all the considered variables have a non-zero value only in a bounded region and vanish identically beyond this region, and the temperature-dependent properties act to reduce all the considered variables.
Fast Design and Analysis of Large Gantry Machining Center Based on Unit Structure
Authors: Cao Li Jie , Chen Wei Fang , Chen Yu Zhi , Ye Wen Hua
Published: January 2014

Large gantry machining centers are used for machining of products in almost all industry. To raise the design and production efficiency of machining centers, an integrated method of fast design and analysis is proposed in this paper. Firstly, large components unit structures are decomposed and extracted based on functions and structures. Then, after conducting fast analysis using APDL programming, a method of Comprehensive Evaluation is employed to optimal select the design schemes. Finally, the column of large gantry machining center QLMT6300 is taken as example to illustrate the validity of the method presented.
Finite Element Analysis of Bridge-Foundation Interaction System under Horizontal Seismic Excitation
Authors: Chen Shou Long , Cui Chun Yi , Sun Yan
Published: January 2014

Based on Newmark-β gradual integration method and elastic-plastic mechanical theory, numeriacl analyses of effects of soft soil depth and thickness and pile length on the characteristics of horizontal seismic response of bridge-foundation interaction system with soft layers conducted by using finite element program Midas/GTS. The numerical results show that: (1) The high frequency components of seismic excitations can be filtered and the low frequency components are amplified correspondingly when seismic waves are transmitted through soft soil layer, and thicker and lower soft soil layer can amplified this effects; (2)The extremum force of abutment shows decreases first then increases with depth decreasing, and displacement of abutment top and bottom has the same law with seismic waves, and the thicker and lower soft soil layer or shorter piles can aggravate abutment force and deformation; (3)Shear extremal stress shows decrease from top to bottom and the thicker and lower soft soil layer or shorter piles are adverse on piles; (4)Moment extremal expresses first increase then decrease with pile length and the lower and thicker soft soil layer or shorter piles can enlarged piles moment.
Lever–Ejection Mechanism of Two–Color Injection Mould
Authors: Yin Yan Fang , Tian Zhen Hui
Published: January 2014

Ejection style of mold effects significantly the quality and efficiency of mold production. A new leverstyle secondary ejection mechanism is illustrated. The mechanism can solve the problem that plastic parts are difficult to eject fully after the first ejection. The mechanism has simple structure and high safety and reliability, satisfies the requirement of full automation and is suit to large quantity of mold production. Commercial CAD/CAM systems provide semi-automatic tools to assist the designer in the dimensioning process. Using the method, good results have been obtained for several basic geometric models.
Finite Element Analysis and Comparison of Screw Pump Models in Uniform Pressure
Authors: Zhang You Jun , Zhang Chen Chang
Published: January 2014

This paper establishes the two-dimensional model, three-dimensional simplified model and three-dimensional of the single-screw pump stators ,and accomplishes their displacement and stress analysis in even pressure inside the stator using ANSYS software. This paper analyzes the comparison results of the combined displacement, equivalent stress and shear stress cloud in the XY plane of single screw pump stator’s three different models. The results manifest the significant differences of the three models for finite element analysis. This study validates that finite element analysis of three-dimensional model leads closer to the true situation.
A New Slip Algorithm for Use in Hardware-in-the-Loop Simulation to Evaluate Anti Slip Control of Vehicles
Authors: Roskam Rolf , Engels Elmar
Published: January 2014

Hardware in the Loop (HIL) systems is widely used for testing vehicle controllers in automotive industry. But algorithms for simulation of the vehicle dynamics have to consider the special restrictions for HIL that is a fixed simulation time constant. Due to limitations of computing power the step size often is set to 1ms. Especially for calculation of the wheel slip this will cause a problem when speed starts from zero. Thats why a lot of authors propose a small vehicle speed at the beginning of the simulation. For evaluation of anti slip controllers in HIL systems this is not possible because stand still is the general starting point for the anti slip controller. Different ideas exist in literature to solve this problem but none of them consider the HIL restriction in an overall approach. In this paper a new algorithm for slip calculation is presented. Therefore two different approaches will be analyzed and combined to a new algorithm. Simulation results show the feasibility for HIL systems.
Two-Level Parallel Alignment Based on Sequence Parallel Vectorization
Authors: Ji Guo Li , Chen Long Teng , Chen Liang Liang
Published: January 2014

This paper proposed a way of two-level parallel alignment based on sequence parallel vectorization with GPU acceleration on the Fermi architecture, which integrates sequence parallel vectorization, parallel k-means clustering approximate alignment and parallel Smith-Waterman algorithm. The method converts sequence alignment into vector alignment by first. Then it uses k-means alignment to divide sequences into several groups and reduce the size of sequence data. The expected accurate alignment result is achieved using parallel Smith-Waterman algorithm. The high-throughput mouse T-cell receptor (TCR) sequences were used to validate the proposed method. Under the same hardware condition, comparing to serial Smith-Waterman algorithm and CUDASW++2.0 algorithm, our method is the most efficient alignment algorithm with high alignment accuracy.
Motion-Estimation-Drive Fabric Dynamic Simulation
Authors: Zheng Jun Bao , Wang Ya Ming
Published: January 2014

This paper proposes an approach to improve the reality effect of fabric dynamic simulation based on mass-spring model. The major problem encountered in fabric dynamic simulation is the difficulty to determine the characteristic of material and the changes of deformation force. To solve this problem, feature points motion constraints are introduced into the mass-spring model. This paper also establishes a framework of an approach to recover feature points motion based on non-rigid motion trajectory representation model. Then the recovered 3D estimation of the fabric feature points are used to adjust the simulation computing process of the mass-spring model, and simulation results with good reality are obtained. The experimental results for fabric dynamic simulation demonstrate the feasibility of improving the reality effect by the proposed motion-estimation-drive approach.
Asynchronous Multi-Sensor Fusion Algorithm Based on the Steady-State Kalman Filter
Authors: Ma Hui , Liu Xian Fei
Published: January 2014

The paper studies an asynchronous multi-sensor fusion problem based a kind of asynchronous multi-sensor dynamic system. Firstly, this paper presents a centralized fusion algorithm based on the Kalman filter without ignoring the correlation between process noise and augmented measurement noise. It is optimal in minimum mean square error. Then using the steady-state Kalman filter to estimate and fuse. Secondly, in the condition that the local sensor estimation error is associated, a distributed fusion algorithm is given by utilizing S.L. Sun optimal information fusion criterion in minimum error covariance matrix trace at fusion center. In distributed algorithm, the value transmitting to the fusion center is determined by the local sensor estimation based on the steady-state Kalman filter and one step predictive value. Since both optimal fusion algorithm standards are different, so the fusion precision will vary. Finally the effectiveness of the algorithm is verified by computer simulation.
Synthesized ADRC for One-Level Inverted Pendulum System through Combination of Separating and Assembling
Authors: Li Wen Ping , Wu Li Qiang
Published: January 2014

Inverted pendulum system is the ideal study object of nonlinear system. The ADRC has good estimate for disturbances, strong robustness and using static decoupling instead of dynamical decoupling. The one-level inverted pendulum system can be regarded as composing of the pendulum angel system and the cart position system. The former is faster and the later is slower. The synthesized ADRC for one-level inverted pendulum system is built through combination of separating and assembling to reduce difficulty in optimizing ADRC parameters of the inverted pendulum system. The synthesized controller is simulated by Matlab under different parameters of the inverted pendulum. Simulation results show that the pendulum angle and the cart position are well controlled.
Study of Curve Planning Algorithm for Partition-Type Rotary Burrs
Authors: Yang Jian Zhong , Song Qing , Li Tao , Chen Ji Hong
Published: January 2014

For traditional rotary burrs, cutter teeth converge at the vertex, which means small chip space and poor cutting condition. In order to increase the chip space and to improve the cutting condition, a new type of rotary burrs with partition blade teeth, which took the feasibility of the actual process into consideration, was proposed. The curve planning algorithm planned the blade curves on the tooth bottom contour surface, and adjusted the tooth bottom contour model by some parameters, such as the small central angle and the position of oblique planes, to control the contour and blade shape for rotary burrs effectively. Experimental results demonstrate the effectiveness of the proposed algorithm.
Optimization and Analysis of Double Wishbone Independent Front Suspension Based on Virtual Prototype
Authors: Guo Zhao Zhuang , Sun Yue Fang
Published: January 2014

The simulation model of the double wishbone independent front suspension with a single degree of freedom is built based on the dynamics simulation software ADAMS/VIEW in this paper. Through the optimization and analysis of the upper cross arm (UCA) and the low cross arm (LCA), we can achieve the goal of decreasing the sideways displacement and the tire wear.
Study of Temperature Field Distribution and Deformation of Chain Link Based on Pro/E
Authors: Ma Bing , Liu Li Zhen , Bai Xue Feng , Wang He , Yang Li Wei , Wang Chong , Li Shi Nan , Yu Lu Ning , Chen Hui
Published: January 2014

This paper studies the temperature field variation of the chain link as well as the stress and deformation distribution of the pin which works in hot forging and stamping production line with heat recovery function. The approach is to build the model of the chain link with Pro/Engineer and apply it to the simulation with Pro/Mechanica. To be specific, it is to stimulate the thermal conduction of the chain link and the stress state of the pin under high temperature with Pro/Mechanica-Thermal and Pro/Mechanica-Structure module, respectively. The results are the temperature filed nephogram of the chain link as well as the stress and deformation nephogram of the pin. The simulation shows that:1) the temperature reaches 420°C at the contacts of the outer and inner plates at 600s, 2) the maximum stress of the pin is 112Mpa at the ends where the pin meets the outer and inner plates,3) the pins max deformation is 0.0159mm at the middle of the pin. Comparing the simulation to the actual temperature at the contacts of the outer and inner plates,which is measured ten times in advance with average of 439°C ,the simulation is favorable. According to the results above, graphite lubrication should be chosen for the chain and the pin can work properly with deformation rate of 0.795. By this way of simulating with Pro/Mechanica, complicated calculations and repeated tests can be reduced largely, meanwhile, useful parameters and mathematical model can also be provided for manufacturing and process control.
An Optimal Frequency Hopping Sequence Set Based on the Polynomial Theory
Authors: Wang Lian , Liu Min
Published: January 2014

A new class of cubic frequency hopping (FH) sequence set is proposed in this paper. The new cubic FH sequence set is proved to be optimal with respect to the average Hamming correlation bound. Furthermore an optimal FH sequence set based on polynomial theory that is optimal with respect to the Singleton bound on FH sequences is also constructed. In addition, the average Hamming correlation of the optimal polynomial frequency hopping sequence set is discussed in this paper. The analysis result shows that the new polynomial FH sequence set is also optimal with respect to the average Hamming correlation bound.
The Research of the Power Capsule Fan Energy Consumption in Thermal Balance Test Method
Authors: Li Yun Long , Zhao Chang Lu , Liu Yang Yang , Peng Qian , Li Chang Jiang
Published: January 2014

The research makes a heat balance test for the radiator system of the analog power capsule. And it also raises a correction calculation method of the fan in the closed cooling heat balance system for special vehicle and proves it by simulation. The research setting up the simulation test bed of the cooling system, conducting the heat balance test and verifying the validity of the carload test bed. Finally, the closed cooling air volume control precision and accuracy of the measurement system can meet the requirements of engineering application
Fuzzy PID Control Mobile Manipulator with Passive Suspension
Authors: Tian Ying , Sun Ling Yu , Zhang Ming Lu , Li Man Hong
Published: January 2014

As researched suspension mobile manipulator system,its control method was discussed. Based on vector method any point on this mobile manipulator system can be described, then independent coordinate variables can be chosen and dynamic model of the whole system was built by Lagrange equation. Based on dynamic model, fuzzy PID control model was built by fuzzy concept. Comparing simulation result of level velocity of point in mobile under no-feedback, PID control and fuzzy PID control, it was proved that MATLAB, this method can be more effective on the mobile manipulator system.
Effects of Chemical Reaction Models on Simulations of Scramjet Nozzle Flow
Authors: Zhang Xiao Yuan , Qin Li Zi , Liu Yu
Published: January 2014

The chemical non-equilibrium flow of supersonic combustion ramjet (scramjet) nozzle is numerical simulated with different chemical kinetic models to research the effects on numerical results of the nozzle performance. The numerical results show that total temperature is increased due to the recombination of dissociation compositions and the combustion of the residual fuel. The effect of the combustion of the residual fuel is more obvious in this paper, and the effect to the performance of the nozzle is noticeable. The species of the compositions in the models influence the quantity of heat sending out when it get equilibrium, so the 9-species chemical kinetic models are more suitable in the simulation of the scramjet nozzle chemical non-equilibrium flows.
Experimental Study on the Electrothermal Effect of Concrete Reinforced with Hybrid Carbon and Steel Fiber
Authors: Xu Jian Chao , Sui Yi , Li Liao , Diao Bo
Published: January 2014

The electrothermal effect of the carbon fiber concrete provides a new way to eliminate the snow and ice on an airfield runway. But the electrothermal effect of concrete reinforced with hybrid carbon and steel fiber and the appropriate fiber content are still unknown. The research aims at the questions above and investigates the electrothermal effect of concrete slabs with different hybrid fiber contents. It shows that the addition of steel fiber can increase the electrothermal effect of hybrid fiber concrete when the carbon fiber content is about 0.6% ~ 0.8% of cement by weight, which means that steel fiber can help to form conductive network. But the electrothermal effect of hybrid fiber concrete is reduced when carbon fiber content reaches 1.0% of cement by weight, because the addition of steel fiber will block uniform dispersal and effective overlap of the carbon fiber and the conductive network gets worse. Air bubbles generate inside the concrete can also increase the electrical resistivity of the hybrid fiber concrete and the electrothermal effect gets worse.
Research of Nonlinear Adaptive Flight Control Using Inversible System of Neural Networks
Authors: Wan Shao Song , Cao Jian , Ma Cen Rui , Yan Cong
Published: January 2014

This paper discusses training structure and procedure about inversible system of neural network. Feedback linearization and adaptive neural networks provide a powerful controller architecture. Finally, this paper surveys the status of nonlinear, and adaptive flight control, and summarizes the research being conducted in this area. A description of the controller architecture and associated stability analysis is given.
Study on Radioactive Wastewater Treatment by Precipitation and Membrane Separation
Authors: Luo Xin , Wang Jing
Published: January 2014

The chemical precipitation method was combined with the membrane separation to treat the simulated radioactive wastewater containing strontium in the paper. The calcium carbonate powder was used to prepare the seed and the sodium carbonate was selected as the precipitant. Sr2+ and CO32- constantly crystallized on the seed surface in the granulation reactor. FeCl3 was dosed in the subsequent membrane separator. The average concentrations of strontium in the raw water and in the effluent were 5.046 mg/L and 0.028 mg/L, respectively. The DF increased gradually with the operation time, with an average value of 279. After the test, the formed precipitate was easy to separate from the liquid and was directly discharge after sedimentation for 24 h. The CF was 3170. The membrane specific flux decreased rapidly in the early stage and then declined slowly with the operation time.
The Application of Linear Motor Analysis
Authors: Zhao Yu Ping , Xu Yu Hai
Published: January 2014

In this paper, through research on the development of linear motor applications both at home and abroad, find out the linear motor application in the field of technology gap, in order to promote linear motor in the domestic promotion and use. Because the linear motor has its own unique advantages, in the mechanical and electrical integration of machinery and machine tool has been widely used, but in the numerical control machine tools, electric processing equipment, mining transportation equipment in areas such as yet there is a big gap, the performance of their products, the types, application field in a large number of blank or infancy. Only seize the opportunity of market demand, the development and application of linear motor and drive control technology on the market widely promotion, is bound to be in the driver with high efficiency, energy conservation and emissions reduction, promote industrial safety production from low-end to high-end equipment the development process of rapid ascension.
Comparison of Robust Input Shapers for Elimination of Residual Vibrations
Authors: Conker Çağlar , Yavuz Hakan , Kapucu Sadettin , Baltacioğlu Mustafa Kaan , Arat Hüseyi̇n Turan , Burgaç Alper
Published: January 2014

Input shaping is a feedforward control technique for improving the settling time and positioning accuracy, while minimizing residual vibrations. Shaped command profiles are generated by convolving a sequence of impulses. To design an input shaping controller, estimates of the system natural frequency and damping ratio are required. However, real systems cannot be modeled exactly, making the robustness to modeling errors an important consideration. Many robust input shapers have been developed, but robust shapers typically have longer durations that slow the system response. This creates a compromise between shaper robustness and rise time. This paper analyses the compromise between shaper duration and robustness for several robust input shapers
Preparation and Microstructure of Exfoliated Graphite with Large Expanding Volume by Two-Step Intercalation
Authors: Zhao Ji Jin , Li Xiao Xia , Guo Yu Xiang , Ma De Yue
Published: January 2014

Exfoliated graphite with large expanding volume (EV) was prepared by two-step intercalation, in which the mixture of nitric acid and phosphoric acid, and that of nitric acid and acetic acid were employed as intercalating agent step by step, and potassium permanganate was used as oxidant. Its preparation conditions were optimized by orthogonal experiment and parallel experiment, and its microstructure was analyzed by scanning electron microscope. The results show that the optimal preparation conditions for the first step intercalation are as follows: the mass-volume ratio of natural graphite (NG) to mixed acid is 1: 4, the volume ratio of nitric acid to phosphoric acid is 1: 2, the mass ratio of NG to potassium permanganate is 1: 0.2, and the reaction temperature is 20~30°C for 40~60 minutes. Those for the second step intercalation are as follows: the mass-volume ratio of acidized graphite (AG) to acetic acid is 1: 5, the mass-volume ratio of AG to nitric acid is 1: 1.5, the mass ratio of AG to potassium permanganate is 1: 0.15, and the reaction temperature is 20~30°C for 40~60 minutes, the EV is 450ml/g under the conditions listed above. The interlayers of graphite are fully opened and become a worm-like fluffy rope.
Wasted Low Grade Iron Ore with High Phosphorus Reuse for Phosphate Removal from Aqueous Solution by Using a Factorial Design
Authors: Yuan Xiao Li , Xia Wen Tang , An Juan
Published: January 2014

Low grade ore iron with high phosphorus (LGIOWHP) is used as an adsorbent to remove phosphate from aqueous solution. The orthogonal experiment of L16(45) was used to study the effects of experimental parameters on the phosphate removal rate. The important degree of the effects of parameters on the phosphate removal rate is as follows: initial pH > stirring speed > reaction time > reaction temperature > adsorbent dosage. The results show that the phosphate removal rate exceed 99% under the conditions of pH 5.6, temperature 65 °C, reaction time 75 min, particle size <0.147 mm, initial phosphate concentration 20 mg/L, adsorbent dosage 60g·L-1and stirring speed 200 r·min-1. After phosphate removal reaction, the phosphate concentrations completely meet the requirement of national discharge standards of the second category pollution (GB 8978-1996 ).
Preparation and Properties of Porous poly(vinyl alcohol)/Powdered Activated Carbon Composite
Authors: Wang Hai Ping
Published: January 2014

Using poly (vinyl alcohol) (PVA) crosslinked with formaldehyde as matrix, starch or calcium hydrogen carbonate as the foaming agent and powdered activated carbon (AC) as the adsorptive constituent, porous PVA/AC composite was prepared by means of chemical crosslinking method. The adsorption behavior of simulated wastewater containing methyl orange dye on porous PVA/AC composite was studied. The experiment indicates that the optimal dosage of AC, sulphuric acid and formaldehyde (37% solution) are 5.0 g, 18 wt. % and 10 ml respectively at the condition of 10.0 g dosage of poly (vinyl alcohol), 95 ml distilled water and 10.0 g starch. It was found that starch was preferably incorporated into the PVA matrix in the form of an aqueous dispersion. In addition, the key factors of influence on water-absorbency including the amount of activated carbon and formaldehyde as well as the concentration of sulphuric acid have been discussed.
Influence of the Electric Current Pulse with Different Pulse Width on the Eutectoid Microstructure of Hypoeutectic Fe-C Alloys
Authors: Huang Zheng Yang , Cen Qi Hong , Li Zhen Hua , Wu Ying , Zou Lei
Published: January 2014

The influence of the eutectoid structure of hypoeutectic Fe-C alloys by applying electric current pulse (ECP) is carried out. The experiment results show that ECP treatment can produce Joule heating. Joule heating increases the diffusion capability of atoms and the driving force of austenite growth, which promotes austenite crystal growth and accelerate cementite dissolution. In view of the influence of the electron-wind-force made by ECP, it can increase the quantity of moving dislocation. The dislocation pile-up which made by the dislocation motion lead to cementite dissolution. Cementite dissolution can lead to concentration fluctuation in Austenite. ECP can also make the phase transformation barrier and the phase transition drive force of graphite formation decrease. As the result, these phenomena can make cryogenic ledeburite become less and graphite increase. Furthermore, it can also increase the nucleation rate and growth rate of ferrite, which can make the relative amount of ferrite increase and the relative amount of pearlite decrease. Based on our experiments, the effect becomes more obvious with the pulse width increase.
Microstructural and Mechanical Properties of Al 7003 Alloy Processed by Dual Equal Channel Lateral Extrusion
Authors: Liu Zhao Hua , Qi Hua Rong , Wang Xiao , Qi Shi , Qing Nan
Published: January 2014

In this paper, the Al 7003 alloy in the as-annealed condition was processed by dual equal channel lateral extrusion (DECLE) at room temperature. The microstructure and mechanical properties of the as-annealed and DECLEed alloys were examined. The results showed that the microstructure of as-annealed Al 7003 alloys was refined by the formation of deformation bands, with dislocation cells and subgrains inside these bands. The final grains with an average size of about 250nm are observed. Due to DECLE, tensile yield strength and ultimate tensile strength increase by 84.5%, 35.4%, respectively. Meanwhile, elongation to failure decreases by 40.4%. The fracture was characterized by ductile fracture due to existence of a large number of dimples.
Ablation Properties of ZrO2-MgO and Mo Nozzle Produced by Plasma Spray Forming
Authors: Qu Jia Hui , Wei Yan Jun
Published: January 2014

ZrO2-MgO and Mo powder coating on a substrate material prepared by an high temperature plasma spraying forming (PSF) for lease-shaped engine nozzles, and its total thickness is about 300 μ m. The surface coating changes of microstructure were investigated by a small solid rocket motor static ablation and the results were discussed for preliminary ions after ablation. The results show that the plasma spraying throat coat is a layer structure and the pore consist in micro-gap between layer and layer.That throat coating erosion is so severe were found after the ablation test , which is because of the metal oxide particles caused by mechanical denudation and high temperature thermal chemical ablation.Whereas the coating interface have no significant cracks after erosion, so that the composite coating of ZrO2-MgO and Mo wear good erosion performance.
Research and Application on Parameter Optimizing of Oxygen Lance Nozzle on Converter for Semi-Steel Making
Authors: Chen Jun , Zhang Tao , Liang Xin Teng , Zeng Jian Hua
Published: January 2014

In order to meet the need of production and promote the smelting efficiency of converter, Pangang Vanadium-extracting&Steel Making Plant optimized oxygen lance nozzle according to the situation of primary 120t converter semi-steel making and have inspected new oxygen lances smelting effect in industrial test. The test shows that the average oxygen blowing intensity raised 0.19m3/t·min with optimized nozzle, shortened oxygen blowing time by 56s,total iron in final slag reduced 0.7%, dephosphorizing rate rose to 82.10% from 79.06%, which developed a good result.
Determination of Diflubenzuron Residues in Vegetables by UPLC-MS/MS
Authors: Wang Xiao Fang , Yang Chun Liang , Huang Mao Fang , Wang Ming Yue , Zha Yu Bing , Lin Ling , Zeng Shao Dong
Published: January 2014

The conditions for detecting residues of diflubenzuron in vegetables by ultra high performance liquid chromatography tandem mass spectrometry were studied. The target was extracted with acetonitrile for 2 min with a homogenizer. The extaction was purifide by a conditioned Florisil SPE cartridge, and then was detected by ultra high-performance liquid chromatography with tandem mass spectrometry. The average recovery was in the range from 87.8 %- 99.2 % at spike levels of 0.1, 1.0 and 10 mg/kg in vegetables, and relative standard deviations was in the range of 4.2 %-8.9 %. The proposed method is fast, simple, sensitive and accurate.
Determination of Chlorbenzuron Residues in Tea by UPLC-MS/MS
Authors: Zha Yu Bing , Huang Mao Fang , Yang Chun Liang , Wang Ming Yue , Lin Ling , Liu Jian Xing , Zeng Shao Dong
Published: January 2014

Residual amount of chlorbenzuron derived from tea was determined by UPLC-MS/MS. Chlorbenzuron was extracted with acetonitrile, purified by carbon/NH2 SPE cartridge, and then determined by ultra high-performance liquid chromatography with tandem mass spectrometry. The values o f lower limit of determination (10 S/ N) of 1.0 ug/kg-1 was found for Chlorbenzuron.Linear relationships in the range within 200 ug/L-1 was found . Recovery and precision of the method was tested by standard addition method at 3 concent ration levels. Results obtained was as follows: recovery 79.2 % - 89.6 %; RSD ( n= 6) of repeatability 0.72 % -5.85 %.It is suitable for the determination of chlorbenzuron residual in tea.
Determination of Imidacloprid Residues in Chinese Cabbage by UPLC-MS/MS
Authors: Zha Yu Bing , Huang Mao Fang , Yang Chun Liang , Wang Ming Yue , Wang Xiao Fang , Lin Ling , Liu Jian Xing , Zeng Shao Dong
Published: January 2014

A method for determination of imidacloprid in Chinese Cabbage was established by using UPLCMS/MS. and the samples are extracted with acetontrile,and the extract is cleaned up by Florisil SPE cartridges and evaporated.Choromatographic separation was performed on a C18 column,and determined by UPLC-MS/MS.The external standard calibration curves were used for quantification. The results showed that a good linear correlation was obtained in the range of 0.005-0.1ug/mL. The limit of quantif icat ion w as 0. 008 mg/ kg .The average recoveries and the relative standard deviations were in the range of 84.9 %~92.7 % and 0.9 %~6.2 %, respectively. It is applicable to the determination of imidacloprid redidue in Chinese cabbage.
Preparation and Electrical Properties of Multilayer Zinc Oxide Varistor by Gelcasting
Authors: Fan Mao Yan , Zhang Li Fang , Xiao Hong , Xie Tian Tian
Published: January 2014

Multilayer ZnO varistors were prepared by aqueous gel tape casting with water-soluble acrylamide as binder. 0.8wt% PAA dispersant was found to be the optimum concentration needed to prepare stable slurry. Plasticizer glycerol has a positive effect on the fluidity of the suspension and oxygen anti-polymerizing inhibitor PEG 2000 deteriorated the fluidity. The addition of 15wt. % PEG2000 eliminates the surface exfoliation absolutely due to the oxygenation of ether units. The solid loading of the slurry was about 71wt% compared to the custom acrylic formulation binder 60wt%. The multilayer ZnO varistors prepared by aqueous gel tape casting display comparable good electrical properties to those prepared by water-based tape casting using custom acrylic formulation binder which is attributed to the high solid loading of slurry.
The Research on Conductive Fibers Configuration of Antistatic Fabric
Authors: Liu Jin Fa , Zeng Xian Ping
Published: January 2014

We examine the process and mechanism of conductive fibers and its blends to eliminate static issue in this froiim a configuration and charge perspective. Different from previous research, this paper wants to emphasize the importance of structure of the fabric,geometry of the phase Production in the study of different configurations. An additional discussion of different charge on conductive fabric with different configurations is also provided. We end the study with the conclusion the surface density of charge has no relation to configuration in the fabric
Effect of Electron Beam Irradiation Crosslinking on PVA Films
Authors: Dai Guo Liang , Xiao Hong , Zhu Shi Feng , Shi Mei Wu
Published: January 2014

Electron beam irradiation cross-linking of polyvinyl alcohol (PVA) films with the presence of N, N'- methylene bisacrylamide (MBA) were studied, improving the thermal stability. The films unirradiated and irradiated were characterized by ATR-FTIR spectroscopy, X-ray diffraction, differential scanning calorimetry and thermo gravimetric analysis. The PVA films with the presence of MBA would crosslink after irradiation. The crystallinity increased firstly and then decreased as a function of irradiation dose, while the melting temperature decreased with increasing the dose. Beside, the T30%, T50%, T90%and Tmaxtemperature of degradation increased as the irradiation dose increased.
Removal Polyacrylamide from Oil Recovery Wastewater by γ-Fe2O3 Magnetic Particles
Authors: Liu Ying Xue , Sui Xian Wei , Huang Jun Hua , Zhu Yan Zhao , Cao Gang , Wu Zhong Kui
Published: January 2014

Polyacrylamide is of concern in oil recovery wastewater treatment because of its persistence and environment effects. A concept is proposed to synthesize γ-Fe2O3 particles with magnetic functionalization for polyacrylamide removal from aqueous media. Magnetic particles were synthesized by the sol-gel method, using NH4HCO3 and FeSO4·7H2O. These magnetic particles show high adsorption capacity for polyacrylamide. Because of the useful magnetic property, large specific surface area and fast magnetic separation, the synthesized materials will provide a convenient and highly efficient means to remove polyacrylamide from oil recovery wastewater.
Soundscape of Public Space and Design Method
Authors: Shen Qiong
Published: January 2014

By researching and organizing the type and the development status of road, railway stations, shopping malls and other public spaces, combining with solving methods on sound sign from domestic and overseas, to explore the design method preliminarily on sound sign, which meet the normal and the visually impaired users. Then, as a conclusion, the design method of soundscape of a comfortable public space is to control the noise source, regulate the tone, volume, and timbre of sound sign in a reasonable way, to create the moral quality and social responsibility of the users in the soundscape, and also to protect the regionalism of soundscape.
Software Design Methods Research on Configuration Technology
Authors: Yang Cheng Hui
Published: January 2014

The thesis is aimed at using the software development tool study on the logistics simulation system of the airport. The thoughts of software design and the software structure for developing the system based on this configuration software are presented. Meanwhile, the main functions of the system are introduced. Besides, the process of transferring database in SQL Server2000 with the configuration software, and the communication process between configuration system and Microsoft Visual Basic 6.0 are introduced here. The research of logistics simulation system has great significance.
A Kind of Traffic Light Controller Simulation Design
Authors: Yang Cheng Hui
Published: January 2014

With traffic problems becoming more prominent issues, directing traffic is no longer can be solved relying solely on human effort. Therefore, the design of traffic lights to complete this demand has become increasingly urgent. In order to ensure vehicular and pedestrian traffic at the crossroads of the smooth, clear through, electronic traffic signal control command is often used. This article describes the use of digital circuits to achieve the design of traffic lights. The paper first describes the design principles of traffic lights and the total circuits, all units were introduced in the total circuits, the final design of the circuit diagram of the test simulation. Simulation results from the experiment can be seen in this article the design of the circuit can be achieved on the control of traffic lights, and simple method for the design of traffic signal controller to provide a certain degree of meaningful research.
Two-Dimensional Numerical Research on the Ablation Effects of Silver Target Bombarded by TEMP Type Accelerator
Authors: Wu Di
Published: January 2014

Two-dimensional numerical research has been carried out on the ablation effects of metal silver target irradiated by high intensity pulsed ion beam (HIPIB) generated by TEMP type accelerator. Temporal and spatial evolution of the ablation process of the target during a pulse time has been simulated. We have come to the conclusion that the melting and evaporating process begin from the surface and the target is ablated layer by layer when the target is irradiated by the HIPIB. Meanwhile, we also obtained the result that the average ablation velocity in target central region is about 4 m/s, which is far less than the ejection velocity of the plume plasma formed by irradiation.
Comparison of Cellulose Pyrolysis in Molten NaOH, Ca (OH)2 and Composite Alkali
Authors: Yang Wu Long , Jiang Hong Tao , Hua Wei , Wu Ye Ru , Yu Feng Wen , Ji Deng Xiang , Ai Ning , Ji Jian Bing
Published: January 2014

With the rapid increase of social requirements on energy, as well as the increasing deterioration of the global environment, energy production becomes one of the most important future challenges for human society. In this context, biomass has become a renewable resource with high potential for energy production [1]. In recent years, the demand for and use of renewable energy has increased globally [. Bio-energy is regarded as one of the key options to mitigate greenhouse gas emissions and substitute fossil fuels, especially obvious in Europe. Over the past 10-15 years, heat and electricity production from biomass increased with some 2% and 9% per year, respectively, biofuel production increased about eight-fold in the same period between 1990 and 2000. Biomass contributed some two-thirds of the total renewable energy production in the European Union (EU) (2000 PJ) or 4% of the total energy supply in 1999 [.
Study on Unbalance Compensation Control of STATCOM Based on MMC
Authors: Xie Yan , Liao Ya Ne , Mao Zhe
Published: January 2014

This paper introduced a new modular multi-level converter (MMC), which could enhance the voltage and power level by sub-converter modules in series and was easy to extend to any level of output. Its structure and working mechanism were described. By analyzing the energy transfer performance of STATCOM based on MMC working conditions in the unbalance compensation, this paper studied compensation control theory in unbalanced complex conditions. To obtain compensation control response speed faster and better compensation effect, a comprehensive compensation control strategy was proposed based on direct current control mode. The simulation results show the strategy has a better tracking precision and response speed for the unbalance compensation current.