bluuebunny/crossref_metadata_2025 huggingface dataset:
Speed Control of Fluid Coupling Based on Fuzzy Control Theory
Authors: Shao Wan Zhen , Li Yong Hua , Wu Yue , Wang Li
Published: February 2011

Based on fuzzy control theory and algorithms, the speed control of fluid coupling was presented. According to variable speed principles and methods, the system of fuzzy variable speed controller was introduced; fuzzy control models were established for fluid coupling. Variable speed process was controlled intelligently by computer. Parameter adjustment was fixed, deviation value was determined and input and output scale factors were modified based on service conditions. The target was approximated by successively reducing the control range.
Study on the Spring-Piston External Mesh Gear Pump with Low Flow Fluctuation
Authors: Zhang Jian Zhuo , Li Kang Kang , Gao Meng , Zhu Tian Zi
Published: February 2011

The cycle function of input flow rate was obtained by Fourier transformation of the instantaneous input flow rate of external mesh gear pump. The model of hydraulic system consisting of gear pump, spring, piston and load was established, the differential functions of the model were established too. The influence of dynamic compensating characteristics in the system caused by both pistons with different area and stiffness of spring was analyzed with MATLAB software and the change of fluctuating flow in the same system was obtained. The simulation result shows that the flow fluctuation of external mesh gear pump could be reduced by using the spring-piston system.
Green Manufacturing: a Pumpless Mechanical-Hydraulic Clamping Device Based on Wormgear and Crank-Slider Mechanism
Authors: Bai Yin Zhuo , Si Guang Ju , Li Xin , Zhong Kang Min
Published: February 2011

Hydraulic transmission clamping device may cause environmental pollution due to the existing of fluid pump and open oil tank. A new-concept clamping device based on high flexibility of hydraulic is introduced in this paper. Without any pump and open oil tank, environments pollution is reduced to a very low level. The driving piston is actuated by combined wormgear and crank-slider mechanism, the clamping piston is driven by sealed fluid in the two cylinders. The self-locking wormgear provides continuous clamping force during machining without any added energy, and a pressure switch guarantees the safety of operation. There are many choices when we considering the power sources, it could be electrical motor with proper speed reducer or just manpower, which provide a rotation movement. The working principle and mechanical calculation formulas are presented in this paper, which is instructive to the industrial field.
Study on Process Control Characteristics of 22MN Fast Forging Hydraulic Press
Authors: Yao Jing , Kong Xiang Dong
Published: February 2011

With the rapid development of modern industry, more and more high requirements for forging velocity and control precision have been proposed. Because it can not only increase productivity, but also can reduce the loss of the workpiece and save raw materials. Due to some characteristics such as high pressure, large flow, heavy moving inertia and so on, the process control performance of the fast forging hydraulic presses often have difficulty in their coordination between rapidity and stability, large shock during pressure relief and flow relief, low control accuracy and high accident rate. To overcome the negative influence and improve forging press performance, it is important to design forging curve. 22MN fast forging hydraulic press adopts electro-hydraulic proportional control system, the simulation and test results approved that the fast forging hydraulic press has high control accuracy and works stably without shock.
Research on Pneumatic Controlling Mechanism of Flying Splicer of Web-Fed Offset Presses
Authors: Chai Cheng Wen , Cai Ji Fei , Wu Shu Qin
Published: February 2011

Flying splicer is a key component of web-fed offset presses for automatically replacing the exhausting web roll with a new one without stopping the machine. The composition and working principle of pneumatic controlling mechanism for driving the flying splicer was analyzed according to the processing requirements of automatic web alternation. By using the software FluidSim, the pneumatic sequential operation controlling circuitry with multi-cylinders for driving the flying splicer was designed, in which the air cylinders cooperates to accelerate the new reel to the circumferential velocity of the expiring web, paste the adhesive end of the new reel with the expiring web, and cut the remaining piece of expired web off. A system scheme and designing method of the pneumatic controlling system suitable for automatic web roll change on high speed offset printing presses was brought out.
Visualized Equivalent Variational Modeling in Tolerance Analysis of 3D Mechanical Assemblies
Authors: Yang Dong Ya , Gong Jun
Published: February 2011

This paper introduces a new, visualized approach for including all the geometric feature variations in the tolerance analysis of mechanical assemblies. It focuses on how to characterize geometric feature variations in vector-loop-based assembly tolerance models. The characterization will be used to help combine the effects of all variations within an assembly in order to perform tolerance analysis of mechanical assemblies by employing commercial 3D kinematic software (e.g. ADAMS). Equivalent variational modeling, based on TAKS method, has been developed for modeling variations in 3D mechanical assemblies. Create a library of Equivalent Variational Joints (EVJs) to allow inclusion all kinds of variations in analysis, and allow the kinematic model to include both geometric and dimensional variation in a velocity analysis. EVJ, for use in tolerance analysis, was developed for commonly used 3D kinematic joint types, and was implemented with examples to explain their use to form Equivalent Variational Mechanisms (EVMs).
Research on the Monitoring Technique of Non-Contact Running Status of Cooling Tower Fan Blades
Authors: Chen Jian Ping , Dong Wei
Published: February 2011

This paper presents a new monitoring method of non-contact blade status—blade tip timing monitoring method based on the principle of discontinuous phase principle, and a new monitoring system of non-contact running status of cooling tower fan blades is developed on the basis of the technology of single-chip microcomputer(SCM) and the blade tip timing monitoring method.The monitoring system is controlled by the SCM and has real-time monitoring to the blade. The pulse signal which is collected by the sensor is processed by the SCM.Through using the timing and interrupt function of SCM, the pulse signal is analysed and processed, when the blade breaks down and deforms, the system will shut down the fan and output a forecast alarm, so the blade accident will be prevented. It is proved that the monitoring method can greatly improve the reliability of the fan running status and the fault diagnosis and effectively prevent the default of the blades, so the monitoring system has a wide application value.
Design and Implementation of a Novel Communication Interface for Eddy Current Displacement Sensor
Authors: Tsai Hung Yih , Chen Jeng Shyong , Hsu Yuan Yong
Published: February 2011

A serial communication interface is designed for an eddy current displacement sensor, which consists of a probe, an oscillating drive circuit, and an RMS-to-DC converter. The experimental results show that the output voltage of the eddy current displacement sensor is 0~5V, the resolution is FS±0.25%, and the maximum linearity error is ±0.6%. In addition, user interfaces for digital signals and serial communication output signals are also built so that users can set the communication parameters to be integrated with industrial automation equipments or to be used by automated production line. The main advantages for the eddy current displacement sensor designed and developed in this paper include low energy consumption, low price, reconfigurable format, friendly interface, customized installation and easy assembly. Also, the serial communication design meets the requirements of flexible production process, production monitoring, and remote malfunction diagnosis, etc. It is applicable to all commercial machine tools or industrial machinery family.
Wavelet-Contourlet Retrieval Using Energy and Kurtosis Features
Authors: Chen Xin Wu , Ma Zhan Qing , Liu Li Wei
Published: February 2011

To improve the retrieval rate of contourlet transform retrieval system and reduce the redundancy of contourlet which cost two much time in building feature vector database, a new wavelet-contourlet transform retrieval system was proposed. Six different features, including mean, standard deviation, absolute mean energy, L2 energy, skewness and kurotis contributions to retrieval rates were examined. Based on the single feature ability in retrieval system, a new contourlet retrieval system was proposed. The feature vectors were constructed by cascading the absolute mean energy and kurtosis of each sub-band contourlet coefficients and the similarity measure used here is Canberra distance. Experimental results on 109 brodatz texture images show that using the features cascaded by absolute mean and kurtosis can lead to a higher retrieval rate than several contourlet transform retrieval systems which utilize the combination feature of standard deviation and absolute mean energy most commonly used today under same dimension of feature vectors.
The Confined Chord Error Algorithm for High Precision Machining Parametric Surface
Authors: Zhang Zhi Qiang , Wang Wen Jin , Jian Zhao , Wang Tai Yong
Published: February 2011

The part’s surface quality of NC machining is influenced by the chord error greatly. The confined chord error algorithm for machining complex parametric surface is proposed for controlling the chord error. The arc length error is utilized to control the chord error of the interpolated point indirectly. The arc length error of interpolated point is computed by trapezia expressions, the coordinate and the first order derivative of interpolated point is computed by the interpolation algorithm. The computed error of confined chord error algorithm is discussed and the simulation indicate that the destined precision of the chord error can be satisfied by this algorithm.
Design of GA-Based Control for Electrical Servo Drive
Authors: Su Kuo Ho , Hsiao Feng Hsiang
Published: February 2011

An alternative control scheme including a directional genetic algorithm controller (DGAC) and a supervisory controller is developed to control the position of an electrical servo drive in this study. In the DGAC design, the spirit of gradient descent training is embedded in genetic algorithm (GA) to construct a main controller to search optimum control effort under possible occurrence of uncertainties. In order to ensure the system states around a defined bound region, a supervisory controller, which is derived in the sense of Lyapunov stability theorem, is added to adjust the control effort. Compared with enunciated GA control methods, the proposed control scheme possesses some salient advantages of simple framework, fewer executing time and good self-organizing properties even for nonlinear dynamical system. The effectiveness is demonstrated by simulation results, and its advantages are indicated in comparison with other GA control schemes for a field-oriented control induction motor drive.
Distributed Battery Management System in Battery Electric Vehicle
Authors: Liao Yuan , Huang Ju Hua , Zeng Qun
Published: February 2011

According to the features of lithium ion battery packs, a distributed battery management system (BMS) for battery electric vehicle (BEV) is designed in this article. The BMS consists of a master module with several sampling modules. The kernel of master module is TMS320C2812 digital signal processor, and the kernel of sampling module is P87C591 singlechip. The main functions of master module include estimation of state of charge (SOC) and security management of lithium ion battery packs, and the main functions of sampling module include battery information collection and CAN bus based communication. SOC estimation method based on Extended Kalman filtering (EKF) theory is adopted in this article to precisely estimate the SOC of lithium ion battery packs.
An Empirical Study on the Coordinated Development of Chinese Manufacturing and Logistics Industry
Authors: Ji Shou Wen , Xia Heng Liang , Meng Jia Ming , Han Xiang Yu
Published: February 2011

An evaluation index system for the coordinated development of the manufacturing and logistics industry (hereafter CDMLI) was established in this paper. An assessment and analysis model for CDMLI was constructed utilizing DEA method; and an empirical research was carried out based on 18 years’ data in China. It was found that the general effect of CDMLI in China was just at a normal level.
Study on the Mixer Used for the Thermal Flow-Reversal Reactor
Authors: Liu Yong Qi , Chen Xiang Chun , Liu Rui Xiang , Gao Zhen Qiang , Wang Jing Tao
Published: February 2011

Large amount of methane is emitted into the atmosphere by mine ventilation and methane drainage systems each year. In this paper, a mixer is developed, which can mix drained coal mine methane with ventilation air methane to be oxidized together in the thermal flow-reversal reactor. The mixing process and the effects of the structural parameters of the mixer on the mixing effect are numerical investigated. The calculation results indicate that reducing the maximum injector diameter will lead to worse uniformity of the mixture. While the uniformity can be improved with increasing the injector angle from 30 to 45 degree, and the improvement is more obvious by reducing the injecting hole diameter under the sum area of the injecting holes fixed. This work is helpful to improve the design of the mixer.
Fuzzy Synthetic Evaluation of Power Quality Based on Combination Weighting Method
Authors: Huang Yuan Sheng , Yuan Li Ming
Published: February 2011

According to the national standard, this paper presents the evaluation indexes of power quality and the classifications of each index. The method integrates advantages of both G1 and entropy weight coefficient method. Also, it establishes an fuzzy synthetic evaluation for power quality evaluation by fuzzy theory. 5 observation points on the power quality was graded. The test shows that the combination weighting evaluation model based on fuzzy synthetic evaluation can evaluate the power quality comprehensively and effectively.
Short-Term Load Combination Forecast Based on Rough Set and Support Vector Machine
Authors: Huang Yuan Sheng , Yuan Li Ming
Published: February 2011

A short-term load combination forecasting model based on rough set and support vector machine was proposed in this paper, firstly build decision table based on historical data, and data mining the data through attribute reduction algorithms, and then use the results of prediction methods to be the input of the SVM, practical load value to be the output, training according to the algorithm of the SVM. the result shows that the SVM combination forecasting model has a better balance fitting and extrapolation,and its prediction accuracy is better than single prediction model.
Research on the Rice Leaf Morphological Formation and its Visualization
Authors: Liu Hong Wei , Liang Yan Yang , Zhang Hui
Published: February 2011

This paper firstly summarizes the morphological characteristics of rice leaf through observation of the rice leaf growth process. And then the mathematical model of the rice leaf growing is established based on experimental data. In this model, the vectorization of rice leaf morphology and growth process is realized by only several explicit biological parameters. The visualization of the rice leaf growth process is realized in computer by technique of computer graphics and the combination of VC++ and OpenGL. The simulation results show that the proposed model can simulate the growth process of the rice leaf very well on the computer easily with less parameter.
Theoretical and Finite Element Analysis of Crosshead of Quintuple Cylinders Fracturing Pump
Authors: Lv Zhi Peng , Zhou Si Zhu , Ma Xiu Hua
Published: February 2011

According to the plunger pump movement principle, this paper analyzed the two kind of typical force situation of the crosshead, and obtained the theoretical maximum force. Established the finite element model of the crosshead, gave an analysis to the load handling and boundary condition. The last results of the node stress and displacement show that the crosshead can work safely.
Geometrical-Optics Approximation for the Simulation of Light Scattering by Single-Nuclear Cell
Authors: Bu Min , Wang Ya Wei
Published: February 2011

According to the morphology of the single-nuclear cell, the eccentric-sphere (ES) model is proposed. The analytic expressions of amplitude function and phase function are revised base on the geometrical-optics approximation (GOA).The intensity distributing and phase distributing of the single-nuclear cell are also simulated by numerical calculation. The incident light orientation and the size of the nuclear on the impact of the backscattering have been discussed. After the analysis, we find that the model and the theory are much closer to the experimental fact compared with the single sphere model. These promote perfecting of the revised theory for inspection of real cell and provide a theory foundation for improving the measuring technique and identification technique of cells.
Experimental Research on Superlong Deep-Hole Drilling Processing Technology for Steel of 4145H Drill Collar
Authors: Liu Zhan Feng , Li Rui Liang
Published: February 2011

Through the analysis for steel of 4145H drill collar, Research into the various factors of cutting, such as the cutting tool material, cutting-tool angle and cutting parameters, combined with the actual structure of the workpiece and the superlong deep-hole processing method for study. In the test, the machining process is analyzed, especially the process of boring and honing. The test result indicates that the trepanning process is stable and reliable to solve the superlong deep hole (Φ71mm×7500mm) of 4145H drill collar steel processing problems of production if the optimizing cutting method is appropriate and the cutting tools and the cutting parameters are rational.
Corrosion Performance of Hot Dip Galvanized Steel
Authors: Zhang Jie , Yu Zhen Hua
Published: February 2011

A method of EIS measure-polarization-relaxation was used to investigate the corrosion performance of different hot-dip coating layers of galvanized steel. The result showed that the corrosion of hot dip galvanized steel was divided into four phases, and the corrosion of each phase was corresponded to different layer respectively. The anti-corrosion difference of every layer was very distinct. The optimal anti-corrosion layer of hot dip galvanized steel was δ phase. This method could be used to detect coating corrosion quickly.
Numerical Simulation of the Two-Phase Flow in a New Type Cyclone
Authors: Xing Ning Ning , Zhao Wei Lin
Published: February 2011

A new type cyclone with oblique top, transitional volute chamber, eccentric inner cylinders and sloping outlet were designed and manufactured by numerical analysis, which had been applied to the five-stage preheater in the cement plant with the capacity of 5000t/d. To simulate the gas flow field and particle trajectory in cyclone, the Fluent software was used, and the RNG k-ε model and discrete random walk model were proposed. The flow characteristics of gas-solid two-phase were analyzed. It is found that the strongly swirling flow occurs in the new type cyclone, and the particles of raw meal can be more efficiently separated from the gas.
Preparation and Second Harmonic Generation of CdS Doped Lead Silicate Glasses
Authors: Liu Hao , Wang Xi Tang , Zhang Bao Guo , Wang Zhou Fu , Zhao Xiu Jian
Published: February 2011

CdS doped lead silicate glasses were prepared with the conventional fusion method. The effects of the ZnO/CdS ratio and the content of CdS on the preparation of CdS doped glasses were both studied. The crystallization process of CdS nanocrystals was investigated by X-ray diffractometry and scanning electron microscopy. Utilizing the Maker fringe method, Second harmonic generation (SHG) was observed from CdS doped glasses without any poling procedures. The SH intensity gets enhanced by increasing the heat-treatment temperature and prolonging the heat-treatment duration.
Parameter Optimization and System Design of the Welding Power Supply for Resistance-Butt Welding of Nuclear Fuel Rod
Authors: Chen Fang Quan , Lin Zu Wei , Liang Guo Wei
Published: February 2011

This paper firstly gives a brief description about the principle of resistance-butt welding of nuclear fuel rod, and it points out that the power supply is a key technology for welding process. According to the welding process and the welded material properties, capacitor discharge power supply is devised as welding power supply. The design of charging circuit of single-phase bridge rectifier with SCR and control circuit is finished. The process of power discharge is simulated and the parameters (capacitance C, charging voltage uc) are optimized with Matlab. By the welding experiments, it shows that the output current curve is suitable for resistance-butt welding of nuclear fuel rods, and the test results of welding samples entirely consistent with process requirements.
Holonic Engineering Data Management Framework for Allied Concurrent Engineering
Authors: Wen Chiun Cheng
Published: February 2011

Virtual enterprise and concurrent engineering are two of the most promising business strategies to address global competition. By unifying the concepts of virtual enterprise and concurrent engineering, allied concurrent engineering aims to integrate the engineering activities and resources from different enterprises through enterprise alliances to quickly respond to customer expectations. This paper presents a holonic system framework for engineering data management to support allied concurrent engineering. The framework is designed based on the concepts of holonic systems to reflect the distributed, collaborative, agile, dispersed and heterogeneous natures of allied concurrent engineering processes. In the proposed framework, key elements such as information items, libraries, and information management units etc. are defined as “holons” which have autonomous, cooperative and configurable properties.
Research on Stability of a 2 DOF Articulated Vehicle
Authors: Wei Wei , Liu Xin Hui , Chen Yan Li
Published: February 2011

In many fields’ rough-terrain vehicles, e.g., mineral exploration vehicles, military applications vehicles, vehicles that can move on rough terrains are desired. The ability of obstacle-climbing was affected by stability of vehicle. The stability of vehicle is closely related to the body attitude, which composes with a number of bodies. For this reason, in this paper, a wheeled mobile vehicle with 2 DOF articulated frame (2DWAV), for example, the new concept of correlative stability is presented. The stability of 2DWAV was analyzed based on static and dynamic in this paper, when it was driving on rough terrain. Finally, the simulation and experiment on rough terrain are carried out.
Simulation Analysis to Shock Strength of Electromechanical Products Using MSC.PATRAN and MSC.DYTRAN
Authors: Ma Bao Cong , Tian Xiang Ke
Published: February 2011

The traditional method of verifying mechanical and electrical products shock strength is primarily through impact test to the product. From the current experiment the force size and amount of structural deformation can’t be gotten when it suffers from the impact load. Applying the software of MSC.Patran and MSC.Dytran, finite element is modeled for the mechanical and electrical products components, and impact property is analyzed when they are subject to impact load. It can reduce the number of verification test and improve design quality. The application is very promising.
Numeberical Simulation of a New Enhanced Heat Transfer Burener
Authors: Lu Xiao Feng , Liu Duo , Li Yuan Qing
Published: February 2011

In this paper, numerical simulation of a new type enhanced heat transfer burner was carried out by using the CFD commercial software FLUENT. Standard κ-ε turbulent model, P-1 radiation model and PDF diffusion combustion model were used to predict the influence of the combustor’s structure change on its performance in the combustion process. The results showed that: The added necking down at the outlet of the combustion chamber can significantly enhanced the jet action of the flue gas, the high speed flow flue gas formed a forced convection cyclical field, convective heat transfer rate was increased greatly and the temperature distribution in the furnace became more uniform, which guaranteed an excellent heating effect. New type of staged air distribution can promote the mixing of the fuel and air. Further more, it can improve the flame length to prevent the local overheating phenomenon during the combustion process. On the basis of the same total sectional areas, the added number of the jet orifice can also promote the mixing of the fuel and air to enhance the thermal intensity and thermal efficiency of the furnace.
Process Mineralogy and Concentrating of Hematite-Limonite Ore in Southern China
Authors: Liu Shu Xian , Shen Li Li , Zhang Jin Xia
Published: February 2011

The grade of the crude hematite-limonite ore is 39.79%. The main metallic minerals are hematite-limonite. Hematite has disseminated structure distributed in the gangue. Limonite was inlayed as stars in hematite. Due to their fine dissemination and close association with gangue minerals, the hematite and limonite particles are hard to be fully liberated, bringing difficulty in their separation. Staged grinding-separation process consisting of high intensity magnetic separation and reverse floatation wag adopted in the beneficiation test on the regionally representative hematite—limonite ore resource. At a grind of 70.0% -200 mesh for the primary grinding and 98.7% -200 mesh for the secondary grinding, the final iron concentrate grade 58.26% and having an iron recovery of 8.33% can be achieved after reverse flotation process test on magnetic concentrate.
Wind Tunnel Test Investigation on Sectional Models of Chaotianmen Yangtze River Bridge
Authors: Wang Cheng Qi , Li Zheng Liang , Yan Zhi Tao
Published: February 2011

By means of wind tunnel tests on the sectional models of Chaotianmen Yangtze River Bridge, some important results are obtained, including the aerostatic force coefficients with the changing of attack angles, and eight flutter derivatives for the bridge deck. The wind-resistant behavior of the bridge is evaluated.
Research on Flow Mechanism of Materials and Micro-State of Distortion Area in Closed Extruding Fine Blanking Process
Authors: Lv Lin , Ning Guo Song , Chen Ming Ming
Published: February 2011

There are some differences between traditional fine blanking and closed extruding fine blanking in stress, separation process and change of material's performance. The article researched the micro-state's characteristics and deformation law in closed extruding fine blanking process, through observing the closed extruding fine blanking parts' metallographic, flow lines of deformation zone and analyzing the micro-hardness.
Study on Livestock and Poultry Farming Wastewater Treatment Using a Hybrid Baffled Reactor
Authors: Shi Li Jun , Ban Li Tong , Liu Hui Fen , Hao Jian Chao , Zhang Wei Yu
Published: February 2011

In this paper aerobic process was applied in an anaerobic baffled reactor to form an innovative Hybrid Baffled Reactor (HBR), which was used to investigate the treatment effect of livestock and poultry farming wastewater. Biofilm cultivation, the influence of Hydraulic Retention Time (HRT) and treatment effect in three tanks were also discussed. The study result showed that good COD and NH4+-N removal efficiency was achieved in the reactor. When the influent COD concentration, NH4+-N concentration and HRT were 900 mg/L, 200 mg/L and 24 h, the concentrations of COD and NH4+-N in the outlet were smaller than 100 mg/L and 70 mg/L, and COD removal efficiency and nitrification rate were 90% and 70% respectively.
Parameter Transfer Method of Mixed-Language Programming
Authors: Sun Yong Hou , Lai Ren Sheng , Zhang Jing , Kuang Bing
Published: February 2011

The mixed-language programming is using two kinds of programming language or more to develop application. During the process of handling many engineering problems, the complex computation is often needed. So the method of mixed-language programming is often used in developing project software. MATLAB is high-performance numerical computation software, and VC++ is a considerably mature application development platform. They are often use in mix programming. During the process of VC++ and MATLAB mixed-language programming, when it calls algorithm function written in MATLAB in the VC++ environment, sometimes the parameters could not be easily passed to objective function. In this paper, a method resolving the parameters transfer of objective function is proposed. That is in the declaration of algorithm function canceling the objective function as one of its parameters, and adding the parameters of the objective function to the parameter of the algorithm function. Finally, a case of parallelism error evaluation system is given to illustrate feasibility of proposed method.
Preparation and Properties of Modified Starch Tannage
Authors: Lv Sheng Hua , Yan Xiao Liang , Gao Rui Jun , Duan Jian Ping
Published: February 2011

Modified starch tannage was synthesized by two steps. First step, a graft starch was synthesized by graft copolymerization of degraded starch with p-aminobenzene sulfonic acid and nekal using horseradish peroxidase (HRP)/H2O2 catalyze system. The effects of system pH, reaction temperature and amount of HRP on the graft efficient (GE) and graft percent (GP) were investigated and the maximum GE and GP of modified starch were obtained using 4 mg HRP/2.24 g H2O2 as catalyst at 35 for 3h under pH 7. The second step, the graft starch was oxidized by periodic acid to prepare modified starch tannage with dial dehyde.The effect of periodic acid on aldehyde groups content of graft starch was studied and it was found that the maximum content was at periodic acid concentration of 4 mol/L. The structure of modified starch tannage was characterized by FTIR, NMR and GPC. The shrink temperature (Ts)of tanned leather is 80.6 °C and the retanned leather has distinctive style of softness and flexibility.
Neutral Deinking Process Optimization and Comparison with Alkaline Deinking of Old Newsprint
Authors: Wang Shou Juan , Kong Fan Gong , Chen Jia Chuan , Yang Gui Hua
Published: February 2011

Pulping parameters in neutral deinking of old newsprint (ONP) and its impacts on deinking efficiency were investigated as well as comparison with alkaline deinking was carried out in this paper. The results showed that the low pulping consistency and short pulping time mostly contributed to the removal of ink in neutral pulping stage. The optimum pulping conditions of ONP were as follows: deinking agent, 0.6%~1.0%; pulping consistency, 6%~8%; pulping time, 15min; pulping temperature, 40°C. The low temperature in pulping stage of ONP neutral deinking process could greatly improve the deinking efficiency and reduce heat energy consumption. The comparison of neutral deinking and alkaline deinking of ONP showed that low pulping consistency contributed to the ink removal for neutral deinking, however, high pulping consistency benefit the alkaline deinking. Neutral deinked pulp had better H2O2bleachability than alkaline deinked pulp, and could save 60% H2O2, when the brightness was similar to that of alkaline pulp.
Study on the Blend Film Prepared by Alginate and Gelatin
Authors: Wang An Na , Wu Li Gen , Sun Yu Dan , Li Xiu Ling , Xu Xiang Ying , Wang Chao , Wang Jie , Fu Qin Qin , Zhang Yuan Yuan
Published: February 2011

In this paper, the effects of temperature, ionic concentration and pH on the blend solution of gelatin with sodium alginate were investigated and the properties of the blend films prepared by gelatin and sodium alginate were studied by FT–IR, DSC and SEM. The results indicated that the blend system of sodium alginate and gelatin had a conditional miscibility, the interactions between sodium alginate and gelatin molecular chains interact through hydrogen bond formation, the surface of blend film had a relatively flat and compact surface and the mass of blend membrane changed a little from 0°C to less than 800°C , however, dropped suddenly at 800°C which showed the stability of blend film was better.
Effect of Electromagnetic Field on the Solidification Structure of HMn084 Brass
Authors: Li Bao Mian , Zhang Hai Tao , Cui Jian Zhong
Published: February 2011

The effect of electromagnetic field on the solidification structure of HMn084 brass (Cu-20%Zn-7.5%Mn-5.5%Al-1.5%Si-1%Fe-0.5%Pb in mass%) had been investigated in this paper. The results show that the as-cast structure of HMn084 brass is composed of matrix β-phase, small amount of α-phase and silicide (Mn, Fe)5Si3. Applying electromagnetic field during the solidification of HMn084 brass can refine grain and silicide phase, promote the uniform distribution of silicide phase. The morphology of silicide phase changes from coarse acicular and massive shape to fine acicular and massive shape. The above-mentioned effects become more obvious with the increasing in current intensity.
A Study on Durability Enhancement of Band Brake for Mooring Winch
Authors: Han Dong Seop , Han Geun Jo , Choi Dong Hwan
Published: February 2011

The brake system is very important part of the machine working. The mooring winch brake holds the ship on the harbor. But sometimes it appeared the excessive stress and brake lining would be broken. So it is necessary to change the shape of brake system with improve the durability of brake band. In this research, three models, such as a single brake shoe with a uniform thickness, a dual brake shoe with a uniform thickness, and a dual brake shoe with different thickness, are adopted as analytic model. In order to evaluate the strength of band brake according to the shape of brake shoe, the finite element analysis for three models is carried out by using ANSYS Workbench.
Mixed Loop Scheme and it’s Industry Application
Authors: Shi Zhuo
Published: February 2011

This paper presents a unified and mixed interpolatory and approximation subdivision scheme for triangular meshes. It can be used to solve the "popping effect" problem when switching between meshes at different levels of resolution. The scheme generates surfaces coincidence with the Loop subdivision scheme in the limit condition having the coefficient k equal 0. When k equal 1, it will be changed into a new interpolatory subdivision scheme. A new set of rules is designed for computing the newly inserted vertices around extraordinary masks. Eigen-structure analysis demonstrates that subdivision surfaces generated using the new schemes are C1 continuous. The method is a completely simple one without constructing and solving equations. The example of British Museum shell design show the great flexibility advantage of mixed subdivision design method in shell architecture, even in other industry design field.
Analysis on the Key Technologies of CBM Surface Well Development in Mining Active Areas of China
Authors: Chen Jin Hua
Published: February 2011

In the past 20 years, coal bed methane (CBM) surface well technology has made some progress in mining active areas in China, but it still remains at its experimental and study stage, and industrialized and large-scale development has not been achieved. The research of the key technologies, such as the distribution of surface wells, the identification and protection of the high-risk locations of casing damage, the optimization of well structure, and the security monitoring of surface drainage in mining active areas, is the key for CBM surface well development in mining active areas of China.
Profit-Oriented Decision-Making Model of Manufacturing Systems
Authors: Li Meng Qi , Li Dong Ying
Published: February 2011

Multi-objective evaluation mode is used in manufacturing system all the time, and this would lead to evaluation complexity and subjectivity when objective number increases. Hence, enterprise profit- oriented single-objective is proposed and created. Then three profit structure elements: sales volume, price and cost as well as their influencing factors are analyzed, and "profit-elements(-properties)-scheme" is created. With this model, environment properties scheme is decided to verify its validity and operation simplicity.
Service-Oriented Manufacturing: the Development Trend of Chinese Manufacturing Industry
Authors: Lin Jian Liang , Miao Rui , Jiang Zhi Bin , Wang Li Ya
Published: February 2011

The service-oriented manufacturing is a new advanced manufacturing model, which combines service and manufacturing intensively. Firstly, this paper elaborates the origin of service-oriented manufacturing and the concept of “product system”. Then, it analyzes the characters and value of service-oriented manufacturing. At last, several key directions of future research in service-oriented manufacturing are proposed.
A Method of Machining Region Planning for Tyre Tread Mold Machining
Authors: Liu Jian Sheng , Tu Hai Ning , Xia Fang Chen , Xiong Jun Xing
Published: February 2011

To satisfy the manufacturing requirement of tyre tread pattern mold, the problem of machining region planning in the computer aided manufacturing of tyre mold is introduced. And it is analyzed that the core technology is the definition of inner and outer contours for machining region planning and tool-path planning. According to the defect of traditional constructed way of machining region, an auto recognition method of inner and outer contour is studied based on the inclusive test method.The detail step of the method is illustrated.Thinking about the special condition of the method, corresponding strategy is given. This method is applied in the computer aided manufactuing of tyre tread mold, by which machining region planning can be solved effectively.
Mechanism of Frequency Conversion Vibration Stimulating Exploiting Technology with Marine Gas Hydrate and its Numerical Simulation
Authors: Zhang Zhen Guo , Gao Lian Feng , Zhang Ying , Wang Yu , Shi Guo Yuan , Liu Chang Shui
Published: February 2011

Gas hydrate is a new energy in the 21st century with the characteristics of high energy density, huge amount of resources and cleaning. It has important significances for resources development, environmental protection and global climate changing. Due to the limitations of the occurrence mode and the technical level of marine gas hydrates, at present, the development and utilization of the resources are still tentative. This article analyzed and evaluated several key technologies to develop marine gas hydrates, that is depressurization, thermal methods, chemical injection method, CO2 replacement method, and fluorine gas+microwave method. However, these methods are difficult to control in the mining process. The research based on the properties of the occurrence of marine gas hydrate, used the principle of gas hydrate decomposition caused by vibration, by adjusting the excitation intensity, frequency, and amplitude. Different local oscillator strength applied on the Occurrence of gas hydrate layer. Gas hydrate stable state changed in mining region, prompting the gas hydrate conversing from solid to gas. Numerical simulations show: Low-frequency vibration should be used in the layers with higher hydrate saturation. The vibration frequency should be improved in the layers with lower hydrate saturation. The method has a good controllability for the region and the process of mining, avoiding geological disasters and environmental issues in the seabed caused by the mining process losing control.
Key Technology of Safety and Effective Mining in Thick Coal Seams with Dirt Band
Authors: Pan Wei Dong , Zhao Hong Bao , Yang Sheng Li
Published: February 2011

It is an important research subject to realize safety and effective mining with the top-coal caving method in complicated geological condition. Based on the bad occurrence conditions and thick dirt band between No.8 and No.9 coal seams of Zhuxianzhuang coal mine in Huaibei mining area, the physical and mechanical properties of dirt band were analyzed, the fracture mechanism of dirt band was studied, caving laws of roof and top coal were summarized, and optimal caving technology of coal was designed and adopted. The results show that the safety and effective mining has been realized in thick seams working face of dirt band, and good economic benefit was achieved. The research results have certain guiding significance and reference value to thick seams mining under similar conditions.
SDS Effect on CH4/N2/O2 Hydrate Formation Rate for CMM Separation and Storage
Authors: Wu Qiang , Gao Xia , Zhang Bao Yong
Published: February 2011

The new methods for separating, storing and transporting drained coal mine methane (CMM) is based on gas hydrate formation. The kinetic hydration process is studied experimentally in detail for two kinds of synthesized CMM with three concentratons of SDS solution. The hydration rates in six experimental systems are calculated using the self-established model to compare the effect of SDS. The results show that the establised model can precisely calculate the hydration rate; SDS decreases the gas hydration rate. This is due to the reason that SDS in the hydrate growth stage, can strengthen the hydrogen bond of water molecules, and be absorbed to the metal wall of the high pressure cell, the SDS membrane can react with mine gas and form crystal nucleus, thus, the hydrate formation rate is raised. It can provide the reference for seeking the optimal surfactants in the hydrate formation process for the mixed gas.
Structural Improvement of the Braking System of Electric Locomotive Based on FEM Analysis
Authors: Cao Li Bo , Yan Pei Gang , Ou Yang Zhi Gao , Hu Chen Chen
Published: February 2011

In practice, the large lever, connecting bolt, small lever pin, small lever and front support pin of the brake system of an electric locomotive often broken or fractured. According to the dynamic and static analysis, the maximum stress values of above-mentioned structures were close or exceeded their yield stress. It was consistent with the actual. Based on the result of finite element analysis, combined with the need of manufacturing process, the structure of those components was improved. Simulation and experiment results have indicated that the improved braking system has enough strength and stiffness.
Research on Design and Magnet Assembly Process of Multivariate and Multi-Roll Permanent Magnetic Separator
Authors: Jiao Hong Guang , Shi Chang Liang , Tian Rui Xia
Published: February 2011

Magnetic separation is broadly applied to the recycling processing of industrial solid waste, conventional permanent magnetic roll can't separate various magnetic materials from waste residue at the same time. Through theoretical analysis and numerical simulation, this paper matched fan-shaped magnetic steel as disc and developed "Interval alternative process of false magnet", this solved the problem of the magnet assembly. On this basis, a multi-roll permanent magnetic separator was manufactured, by connecting multiple magnetic in series. This equipment can not only get different magnetic products, but also can complete roughing and cleaning assignments, and eased gradation requirements of repairing material significantly. An experiment of choose iron from zinc volatilization kiln furnace slag for a zinc smelter, iron recovery and grade is 76.33% and 62.31%, respectively. This separation roller can also be used in ore, nonmetalliferous ore sorting and powder materials purification, etc.
Finite Element Analysis of Heavy-Duty Dump Truck Subframe Based on ANSYS
Authors: Li Hai Gang , Si Jing Ping , Han Lu , Zhang Bao Wei
Published: February 2011

Dump truck subframe is an important bearing components which is used for connecting the chassis frame and the cargo compartment, and the rationality of its design has an extremely important influence on performance of the entire vehicle, moreover, the use of CAE technology can optimize the design of the subframe. In this paper, using solid element as basic element, the finite element analysis model of dump truck frame is built up with the software ANSYS, the static characteristics of the subframe under bending mode, twisting mode, braking mode and lifting mode are studied. The dynamic characteristics of the subframe are also analyzed, the stress parameters under static characteristics, the natural frequency and the corresponding mode shape characteristics of the subframe under dynamic characteristics are obtained, the improved advice of structural design for the subframe is proposed.
Study on Optimal Real-Time Feedback Scheduling of Networked Collaborative Design Project under Uncertainty
Authors: Liu Dian Ting , Zhou De Jian
Published: February 2011

Aimed at resource-restrained project scheduling problem under uncertainty which is a hot research spot, a kind of real-time feedback scheduling method is presented in this paper. Before a project is executed, the scheduling plan of all subtasks is made according to ascertain condition. The running procedure of the project is monitored by a workflow management system. When a situation, in which the finish time of the project will be delayed by changed running condition, is detected, the related information is fed back to a scheduling controller; And the controller calculates the controlling data according to optimal objective and then sends it to object scheduled; And then the old plan is rescheduled The concept model for real-time feedback scheduling of cooperative design project with resource-restrained is setup. When only the finish time of subtask is influenced and it is described as interval number, its corresponding mathematic model is setup and converted to an ascertain one by possibility-level, and solve it by GA(Genetic Algorithm). The structure of this GA is given, and a method of chromosome coding, that is the chromosome is segmented according to resources and gene is sorted in task-series, is presented in this paper. A computational example is studied in this paper, the results reveal that the method presented is valid.
Study on Topology Optimum Design of Middle Pan
Authors: Qie Yan Hui , Liu Bo , Wang Xiu Hong , Li Xiao Lei
Published: February 2011

At present the study on the application of the topology optimum design in scraper conveyor is still under development. In this paper the topology optimization based on the Solid Isotropic Material Penalization (SIMP) is applied to the design of the middle pan, which can provide a valuable conceptual design scheme for the selection of the middle pan pattern. In conjunction with the homogenization theory and Finite Element Method (FEA), the mathematical models for designing the middle pan by maximizing the rigidity are developed in this paper. By applying the topology optimum design to the middle pan, the topology optimization based on the SIMP method is proved to be reliable and practical at the conceptual design stage of middle pan.