bluuebunny/crossref_metadata_2025 huggingface dataset:
Experimental Study on the Wet Molding for Wheat Straw Pellet Fuel
Authors: Hu Jian Jun , Zhang Quan Guo , Lei Ting Zhou , Wang Zhi Wei
Published: November 2010

In the paper, in order to investigate the situation of impact on wet molding for straw of compressing speed and moisture ratio, and look for the inside law between them, closed compress experimental study on the wet molding for wheat straw pellet fuel was done by electrical universal material experimental machine and experimental provision made by oneself. Study on the impact situation for compressing speed and moisture ratio was done from pressure intensity, displacement and density of materiel. The result, which low compressing speed and low moisture ratio were propitious to wet molding, was gotten. The molding stage can be divided to loose stag, transitional stage, compressing stage. Partial elastic deformation mainly occurred In loose stage, and its mathematical model was linear equation. Elastic deformation mainly occurred In transitional stage, and its mathematical model was exponential equation. Plastic deformation mainly occurred In compressing stage, and its mathematical model was linear equation. The conclusion above has general directive significance to wet molding for straw pellet fuel.
Signal Strategy of Conditional Transit Priority Based on Transit Schedule
Authors: Tan Xiao Yu , Li Jin , Deng Wen
Published: November 2010

Combined with the actual situation of China, drawing on foreign models based on the quantitative methods, this paper gets a model based on conditional bus priority for signal timing design which is combined with the traditional model through the application of conditional bus priority. The model considers more about the actual situation of the intersection, as well as a variety of other general vehicles which also need to pass through the intersection; it is a more moderate, harmonious, and better public transport priority method which does not use at the expense of other general vehicles.
Study on the Head Impacting Properties of Foam Composite Material Engine Hood
Authors: Zhao Gui Fan , Teng Tso Liang , Cui Dong
Published: November 2010

The head impacting properties and the lightweight effect of a kind of foam composite material engine hood are studied in this paper. The finite elements model of headform impactor impacting the engine hood is created, LS-DYNA is used to do the simulation of impacting, the dynamic response of original steel material and foam composite material are simulated. The results show that using foam composite material can reduce the injury value of pedestrian head. In the end, the lightweight effect after using the new material is analyzed.
Optimization of Processing Parameters for Micro Arc Oxidation Based on Orthogonal Design and Support Vector Machine Regression Analysis
Authors: Pan Ming Qiang
Published: November 2010

During processing, the interaction among the multi-parameters which influences the coating surface roughness is very complex. In order to gain rapidly the best parameters, this paper raises the method to optimize parameters of the micro arc oxidation based on the orthogonal design and the support vector machine regression analysis. The experiments were performed for the coating surface roughness according to the parameters designed by orthogonal on LD10. And then, the support vector machines regression was used to obtain the model between the surface roughness and the parameters according to these data. Further, the model optimized the parameters and predicted the corresponding coating with Ra1.025μm. At last, the model was verified by the experiments of single factor method under the same condition as the orthogonal experiments. The results, comparative analysis of the surface roughness of predicting and actual values generated by the same parameters, shows that the square error and the ratio of the average error influenced by the parameters expect for the temperature is less than 0.1 and 10% respectively, and the actual coating with Ra1.199μm was obtained that the parameters optimized by the model treated.
Simulation Research on Performance of All Electric Brake System in Tracked Vehicles
Authors: Shang Ying Hui , Zhang Yu Nan , Yan Nan Ming , Zhang Jian , Wang Dong
Published: November 2010

In order to improve brake performance of military tracked vehicles, a novel all electric brake system (AEBS) is studied in this paper. Besides its system scheme and construction are presented, its Object Oriented simulation models are built with Simulink to analyze its two operating modes, parking button brake and foot pedal brake. Screw linear speed and brake compressive stress in the parking brake and running brake under various given condition are simulated with the model. Simulation results prove that the performance of the all electric brake system improve remarkably and satisfy the design requirement of military tracked vehicles.
Numerical Simulation of Intercepting Efficiency on Airbag Active Protection System
Authors: Zhong Kun , Du Zhong Hua , Zhou Liang , Song Li Li
Published: November 2010

Based on the advantages and disadvantages of existing active protection system, this paper proposes a new type of airbag active protection system. The components and working process of the system is introduced. Then taking the physical process of airbag active protection system against a rocket projectile as an example, a 3D finite element model (FEM) of airbag and rocket projectile is set up. With the assistance of the software LS-DYNA3D, through performing the simulation when the rocket projectile touched the airbag with an angle 30° from the normal interface, the intercepting efficiency is calculated and analyzed in the simulation. Results show that airbag can deform and rupture the metal jet generated by the rocket projectile, thus greatly reduce its armor penetrating effect. Finally, it shows excellent protective effect of the airbag active protection system.
The Stress-Strain Analysis for the Nonlinear and Strength Difference Structure of Bars Jointed to Rigid-Body of Fixed-Point Motion
Authors: Liu Xie Quan , Ni Xin Hua , Zhang Shu Qin , Zhao Lei , Zhong Guo Hui
Published: November 2010

Many material have different stress-strain relation in tension and compression, generally the relation is nonlinear. In this paper, we use two exponential functions to approximately represent the stress-strain relation of nonlinearly elastic material and analyze strength-difference structure of bars jointed to Rigid-body of fixed-point motion. The displacement method is used to derive the universal expression of calculating stress and strain. The nonlinear equations for computing angular displacement of the rigid-body has been given and general computing program has been worked out. They can be accurately and conveniently calculated. This problem has been solved satisfactorily.
Modeling Bending Rigidity of Nonwovens with 2D Structures
Authors: Liu Hua Wu , Chen Zhi Gang , Xu Ping
Published: November 2010

A theoretical model was developed to describe the bending behaviour and property of nonwovens with two-dimensional structure. The bending and tensional behaviours of single fibre with and without slippage in a bent fabric were analyzed. The method determining the neutral plane of bent nonwovens and the bending rigidity of fabrics with general two-dimensional structure were developed, incorporating fibre orientation distribution, number of fibres, fibre original position before bending and the Poisson’s ratio of the fabric. The analyses also give the fibre orientations that lead to the maximum and minimum contributions to the bending rigidity of the nonwovens in laminate and sandwich structures
Parameters for Heat Transport in Radiata Pine Board
Authors: Liu Hua Wu , Wang Zhen Yun , Xu Ping
Published: November 2010

A universal transit heat transport equation was represented and all parameters for applying such a formula to drying of Radiata pine were modeled, incorporating reasonable physical conditions.
In previous empirical models, the influence of drying temperature on the conviction heat transfer was ignored, though it is parentally not negligible. In this study, a multivariate regression model was developed from previous experimental data, in which both air velocity and drying temperature were taken into consideration. In addition, the models of heat diffusion properties in axial, tangential and radial directions were presented in which drying conditions and wood properties were taken into account. With those models, scenario computer simulation may be conducted to explore the drying phenomena of Radiata pine board.
Effect of Modified Atmosphere Packaging on Nutritional Value and Quality of Honey Pomelo
Authors: Li Xi Hong , Wang Xiu Li , Zhang Li , Li Yuan Yuan
Published: November 2010

The effects of MA packaging on nutritional value and quality of honey pomelo have been investigated during storage at 8 . Results show that 25μm-thick PE films maintained more suitable headspace gas concentrations for preservation of pomelo than 50μm-thick PE films and microperforated 25μm-thick PE films (control). The 25μm -thick PE films have the highest value on quality parameters, which were 12.2%, 0.9%, 47.1mg/100g and 44.8mg/100g for total soluble solid, titratable acidity, vitamin C and total phenolic content after 150 days of storage, respectively. This study suggests that MA packaging with 25μm-thick PE films show the best effects in maintaining the quality of honey pomelo during storage at 8 .
Influence of Change of H/O Mixture Ratio on Combustion in the Combustor of the Micro Thermophotovoltaic System
Authors: Zhang Xiao You , Wu Yong Jun , Xu Li You
Published: November 2010

The change of H/O mixture ratio has affect on the combustion of H/O mixed gas in the micro combustor, and the temperature distribution of the micro combustor wall are researched in this paper, when the mixed gas flux is different in the combustor of the micro thermophotovoltaic system. The result of the test indicates that H/O mixed gas can combust stably in the micro combustor. As mixed gas flux is 3.92g/h and H/O mixture ratio is 2, the temperature of the micro combustor wall is about to 1100K, which matches work requirement of the micro thermophotovoltaic system.
Demerit-GWMA Control Chart for Demerit Statistics
Authors: Kang Hae Woon , Kang Chang Wook , Baik Jae Won , Nam Sung Ho
Published: November 2010

A classical Demerit control chart is used to monitor the process through which various types of defects in complex products, such as automobiles, computers, mobile phones, etc. are found in general. As a technique for rapidly detecting small shifts of the process mean in the control chart, the EWMA(exponentially weighted moving average) technique is very effective. This study suggested the Demerit-GWMA control chart, combining the GWMA(generally weighted moving average) technique, which shows better performance than EWMA technique in detecting small shifts of process mean, into the classical Demerit control chart, and evaluated its performance. Through the evaluation of its performance, it was found that the Demerit-GWMA control chart is more sensitive than both the classical Demerit control chart and the Demerit-EWMA control chart in detecting small shifts of process mean.
Adsorption of Arsenic (III) onto Modified Magnetic Microspheres
Authors: Wang Jing Song , Chen Si Guang , Zhou Zhi Wu , Peng Rui Ting
Published: November 2010

Modified magnetic microspheres were prepared and used to adsorb As ( ) from aqueous solution. The experiments were conducted in a batch system to study the adsorption behavior of As( ) onto these microspheres and the adsorption equilibrium, adsorption isotherm and kinetics were also studied. The experiment results showed that the modified magnetic microspheres are effective to remove As ( ) from aqueous solution, and the percentage removal of As ( ) could reach over 90% at pH 2.0 within 90 min. The pseudo second-order model was found to fit accurately with the experimental data. The adsorption isotherm can be described by Langmuir model.
Oxygen Reduction in PEM Fuel Cell Based on Molecular Simulation
Authors: Sun Hong , Liu Chuang , Gao Xiao Jia , Tang Yu Lan
Published: November 2010

The electrochemical reaction in the cathode plays an important role on the performance and application of PEM fuel cell. In this paper, mechanism of oxygen reduction reaction in the cathode of PEM fuel cell is simulated based on molecule dynamics and quantum mechanics. The most probable electrochemical reaction process in the cathode is obtained by analyzing transition state and free energy of oxygen reduction reaction with the catalysis of Pt. Simulation results show that 2e reaction mechanism is more applicable to oxygen reduction reaction in the cathode than 4e reaction mechanism; according to the potential energy barrier, the process from hydrogen peroxide to water is the controlling process of oxygen reduction; comparison with the total free energy, when the fuel cell temperature is 353K, the thermodynamics potential of PEM fuel cell is the highest. Simulation results are very helpful to understanding reaction mechanism in the cathode of PEM fuel cell and optimizing its performance.
Investigation of Pyrocarbon Based Carbon Paper for Proton Exchange Membrane Fuel Cells
Authors: Zhang Ming Yu , Wang Li Ping , Su Zhe An , Huang Qi Zhong
Published: November 2010

A proprietary in situ chemical vapor deposition (CVD) process was developed to grow a layer of pyrocarbon on carbon paper preform for proton exchange membrane fuel cells (PEMFC). The carbon paper preform is continuously manufactured by dry method. The characteristics of the carbon paper such as surface morphology, polarized light characteristics, and cross-section morphology were characterized using electron microscope, polarized light microscope, respectively. Fuel cell performance of the carbon paper was evaluated using single cell with hydrogen/air at various relative humidity (RH) conditions. The carbon paper with in situ growth of pyrocarbon showed significant improvement in lowering in-plane electrical resistance as well as fuel cell performance at dry condition. The carbon paper as seen under scanning electron microscope showed excellent surface morphology with pyrocarbon connecting carbon fibers tightly by CVD process.
Preparation of Novel Amino-Functionalized Ionic Liquids and their Application
Authors: Liu Bao You , Wang Yuan Yuan , Wei Fu Xiang , Zhang Hong Yan
Published: November 2010

Four novel amino-functionalized ionic liquids were prepared with high yield (80%-90%) in a simple, straightforward, one-step synthetic method; their structures were characterized by IR, UV, and NMR, their important physical and chemical properties have been detected. According to the research of their application in absorbing SO2, these ionic liquids can act as promising perfect adsorbents with the advantages of high absorption efficiency (1.06-2.50 of the MR ratio), with high desorption efficiency of 90%-100%. In addition, it was found that these ionic liquids could be reused without significant loss of reactivity; these ionic liquids were valuable for academic and industrial application.
Synthesis of a New Photochromic Compound for Optical Storage
Authors: Cui Shi Qiang , Pu Shou Zhi , Liu Gang , Liu Wei Jun
Published: November 2010

A new photochromic compound 1-[2,5-dimethyl-3-thienyl]-2-[2-methyl-5-pyridine-3-yl-3-thieyl] perfluoroyclopentene(1a) was synthesized, its photochromic properties were examined, the result indicated that the color of the compound 1a changed from colorless to a purple one upon irradiation with 297 nm UV light, a new absorption maxima were observed at 549 and 553 nm in hexane and PMMA film, respectively. The the photochromic reaction kinetics indicated that the cyclization processes of 1 belong to the zeroth order reaction and the cycloreversion process belong to the first order reaction.This new photochromic system also exhibited remarkable optical storage character.
The Research of Virtual Assembly of Cotton Picker Roller Based on Virtual Reality
Authors: Sun Wen Lei , Cao Yu Shan , Sun Wei
Published: November 2010

This paper took the roller of a new cotton picker as the example, drew its various parts and assemblyed overally in the three-dimensional mapping software environment of UG, imported the models into the virtual reality assembly platform by the interface between UG and VAPlatform, added the virtual hand and carried through the virtual assembly in the virtual scene based on the certain assembly restriction in UG. The paper realized the visualization of the assembly path, offered the foundation for the feasible assembly path, and finally obtained the reasonable assembly process, provided a set of reasonable operation guide for the workers to assemble the cotton pickers.
Study on Statistical Method of Steel Bridge Parts Information Based on Three-Dimensional CAD
Authors: Chen Lei , Deng Ming Ran , Jiang Zheng Feng
Published: November 2010

Parts information of steel bridge with tens of thousands of parts is difficult to be managed and be executed statistics. On the platform of three-dimensional CAD systems, steel bridge node is the study object in this paper, according to the assembly relationship of all parts in the three-dimensional assembly model, the parts list, quantity, geometrical information and weight of the parts of the steel bridge nodes are extracted from a three-dimensional model by the application interface provided by three-dimensional CAD systems. On the basis of geometrical information of the parts, the minimum boundary dimension of the parts is computed by use of the principle of computer graphics. The method can rapidly and accurately obtain parts information, and can provide basis for assembly process and processing technology.
Multi-Population Multi-Objective Cultural Algorithm
Authors: Guo Yi Nan , Cao Yuan Yuan , Liu Dan Dan
Published: November 2010

In existing multi-population multi-objective cultural algorithms, information are exchanged among sub-populations by individuals. However, migrated individuals can not reflect the evolution information enough, which limits the evolution performance.In order to enhance the migration efficiency, a novel multi-population multi-objective cultural algorithm adopting knowledge migration is proposed. Implicit knowledge extracted from the evolution process of each sub-population directly reflects the information about dominant search space. By migrating the knowledge among sub-populations at the constant interval, the algorithm realizes more effective interaction with less communication cost. Taken benchmark functions as the examples, simulation results indicate that the algorithm can effectively obtain the Pareto-optimal sets of multi-objective optimization problems. The distribution performance is also improved.
Modeling and Optimization on Yard Allocation Planning for Container Terminals
Authors: Yu Lei Lin , Lu Zhi Qiang , Xi Li Feng , Wan Zhan , Li Lin
Published: November 2010

The increase of container shipment causes higher demand on the seaport container terminals, container logistics and management. How to rationally allocate the limited space resources and how to improve operational efficiency, is an important subject for container terminals. In this paper, the mathematical modeling and optimization on yard allocation planning based on the mixed storage is proposed with an objective to balance the workload among different blocks and to minimize the delay of container ships. Two corresponding heuristic algorithms are developed to solve this problem. The experimental results show that the proposed algorithms are the promising tool for allocating blocks’ workload.
Model Construction and Application of Integration Cellular Manufacturing System
Authors: Fan Jia Jing , Feng Ding Zhong
Published: November 2010

Cellular Manufacturing is taken into account with advancing of the production mode of multi-product and small batch. Cellular Manufacturing includes cell foramtion, machine layout and cellular layout. Most researchers are foucing on the three contents respectively in their previous research. But these three contents are co-relation and the change in one content will affect the others and the result. So the integration mathmatical model of the cell formation, machine layout and cellular layout is put forward in this paper to abtain the minmum of material movement handling cost and machine depreciable and repair cost. At last this paper applies the model to machining workshop of XXX Company and gains a good effection.
Research on Mechanical Characteristic of a Self-Force-Amplifier Damper
Authors: Zhao Dong , Liu Xue Kai , Tan Hui
Published: November 2010

The vibration energy dissipation theory of a self-force-amplifier dry friction damper has been discussed detail in this paper. The research shows that the new dampers have traditional dampers’ merit and overcome their shortcoming which can only offer invariable friction. At the same time, they can be feedback controlled by the displacement signals of the controlled structure. So the ability of energy dissipation and vibration control effect of the new damper can be augmented.
Refining of Metallurgical Grade Silicon by Acid Leaching
Authors: Lu Dong Liang , Hu Yu Yan , Lin Tao , Liu Yu , Wang Bo , Sun Yan Hui , Chen Hong Yu , Li Qian Shu
Published: November 2010

Solar grade silicon (SoG-Si) is the key material for photovoltaic applications. In this study, the silicon grain size, concentration of HF, leaching time and leaching temperature were investigated by orthogonal methods. The results showed that the silicon grain size is the most important factor for the purification of silicon. Furthermore, the obvious removal efficiency of iron and aluminum was observed when the mannitol used as the chelated reagent in HF leaching process. Inductive coupled plasma atomic emission spectroscopy (ICP-AES) results indicated that the purity of the samples improved to a large extent with the chelated reagent.
Efficient Tool Path Planning for Machining an Impeller with a 5-Axis NC Machine
Authors: Feng Jun Ran , Dai Xing , Cheng Yong Zhi , Xiong Cai Hua
Published: November 2010

This paper presents an efficient tool path plan for machining the impeller with a 5-axis numerically controlled machine. A method of assigning key tool orientations is reported and B-spline interpolation is used to produce smooth and interference-free tool orientation. The final tool paths generated by the proposed method are verified by using the cutting simulation function. A machining experiment is performed on a Mikron machine tool. Experimental results show that the present method is feasible and can produce interference-free tool path.
Stability and Correlation Analysis of Data Obtained by Contact and Non-Contact Measuring Body
Authors: Shang Xiao Mei , Chen Jie , Wang Zhong Yi
Published: November 2010

Today, high technology is transforming traditional industry. The science, suitable measuring technique and data application method are the basis of large-scale manufacture realizing, which not only meet individual consumer demand, but also are meaningful to raise the economic efficiency and reduce production cycle of custom-made. Custom-made enterprise always has its own contact measuring method and mechanism, which uses uniform size clothing to wear or measurement by manual re-confirm to obtain data.The efficiency of this method is low and its accuracy is poor. But non-contact measuring method has problems in application of equipment and can not completely replace manual operation. How make manual measuring method and laser measuring instruments work together to get data is the demand of practical management and production improvement in enterprise, but there is no data standard between the two methods. This research based on national size standard and professional normative measuring method, and used manual and three-dimensional laser measuring ways to collect sample data in identical situation. Under designed data standard, the research used mathematical statistics to analyse data, and then made comprehensive assessment in aspects of instrumental stability and data correlation. This paper is the case of practical application, among which used to study the tolerance range of the standard data was initial issue (sci-tech novelty report was attached).
Research on Loading Simulation of Bolt Preload in Finite Element Analysis Based on ANSYS
Authors: Hu Ying Chun , Hu Yi Zhi , Li Hui Xun , Hou Jun Yan
Published: November 2010

In the process of Finite Element Analysis (FEA) of mechanical structural system, the bolt pretension was often simulated in bolt fastening with components. Three methodology of Pretension Elements Method, Falling Temperature and Penetrative Contact Method as well were proposed and compared with each other using FEA technology in ANSYS. The simulation result was close to the theoretical value when using Pretension Elements Method, while was much bigger than the theoretical one when using the way of Falling Temperature as well as Penetrative Contact. It has been proved to be a very good way as well as reliable theory and application foundation for Pretension Elements Method in simulating real preloading in jointed bolt using Finite Element Analysis.
Achievement Appraisal and Improvement Study on Processing Material Manufacture Process
Authors: Yao Yu Ling , Wang Bao Jun , Xin Hai Hong
Published: November 2010

Product is divided into four types which are hardware, software, processing material and service. Processing material is one typical kind of product among them. The hardware produced in several steps could be divided into single independent unit which is called “working process”. However, the flow is continual and there is no independent “working procedure” during the production of processing material. So how to evaluate and improve process achievement in the manufacture process of processing material becomes the study goal of this paper. This paper aims to explore the method for the process capacity evaluating of processing material as well as improving by researching a case on super-higher molecular weight polyethylene porous plastic. Statistical technology and knowledge are used together to improve the comprehensive ability of process.
Research of Lasers Coating Applied with the Hammer Mill's Hammer
Authors: Mao Ping Huai , Xu Nan Nan
Published: November 2010

Based on the ANSYS Software the hammer mill’s hammer applied lasers coating is feasible analysis. At first the paper describes the overall body hammer mill and hammer of traditional materials. Then the hammer is applied with lasers coating. Then simulate it and Fatigue calculation by ANSYS Software. By analysis of the coating hammer is found that the hammer’s life can develop well. So it has a nice economic Potential.
Degradation Screening Test Design for Electronic Products
Authors: Lin Rui Lin , Zhong Qiang Hui
Published: November 2010

Long-life electronic products need to be put in stress environment for long durations in traditional ESS(environmental stress screening) tests in order that items having infant mortality or defects are weeded out from products. However, long stress durations cause aging effects on good items. For some products, failures are defined in terms of performance characteristics degrading some critical values. For the purpose of reducing durations and aging effects, this paper analyzes the difference of performance characteristics between normally degraded products and abnormally degraded products, and assumes the distribution of products’ degradation characteristic variable is contaminated distribution model, then presents a degradation screening test design. This design firstly ascertains the model coefficient using identifiable condition of contaminated distribution combined with the analysis of degradation test, then ascertains screen duration and screen critical value. Lastly, this paper gives an example to illustrate the availability of the design.
Effect of Network-Forming Oxides on Long-Lasting Phosphorescencein Mn2+ Doped ZnO-B2O3-SiO2 Glass
Authors: Li Feng Feng , Zhang Ming Xi , Shen Yi , Wang Qing Hui , Liu Zhi Gang
Published: November 2010

Mn2+-doped zinc borosilicate glasses (ZSBM) with excellent long-lasting phosphore- scence (RTSLLP) and photostimulated long-lasting phosphorescence (PSLLP) were successfully synthesissed by high tempreture solid-state reaction. Through increasing the ratio of SiO2/ B2O3 with fixing the content of ZnO in 60mol%, RTSLLP and PSLLP were improved obviously. By TL study, it was seen that the traps concentration had a big change with the increasing in silica content, which bringed a positive impact on the RTSLLP and PSLLP, especially PSLLP performance, and through infrared absorption spectrum analysis, it was confirmed that the distribution of trap-level was closely related to the silicon oxygen groups and boron oxygen groups.
On Obtaining Dynamic and Static Characteristics of Heavy Load Deflection Angle Milling Head by CAE and Experiment Techniques
Authors: Cai Li Gang , Ma Shi Ming , Liu Zhi Feng , Cheng Qiang , Zhao Yong Sheng
Published: November 2010

The heavy load deflection angle milling head is an important functional component of 5-axis CNC machine tool, which is used for large and complex free-form surface processing. The characteristics of this kind of milling head are implementing multiple degrees of freedom motion with revolution and deflection angle simultaneously. Obtaining milling head dynamic and static characteristics is a pre-requisite problem to resolve for the development and research of heavy load deflection angle milling head independently. Dynamic characteristics are obtained through combination with CAE (Computer-aided Engineering) technique and experiment validation. For CAE analysis, the main parts of milling head are glued together considering milling head operating at a specific position. Experimental validation is carried through with initial fixing constraint style, which validates the correctness of CAE technique. Experimental and CAE analysis results are compared and analyzed. Therefore, exact dynamic characteristics of milling head and unsubstantial segments and its influence factors are gotten. Static characteristic is obtained considering milling head operating in different posture by CAE technique. The analytical method of three points at half of cutter are loaded is introduced. Calculated results indicate that the deformation of tool tip is the largest when milling head operating in 45° posture, which corresponds with the deformation situation of the milling head operating in workshop. The analytical results of dynamic and static characteristics of milling head provide theoretical and experimental support for structure optimization and improving of heavy load deflection angle milling head.
Study of Utilizing of Massive Iron Tailings Resource
Authors: Sun Guang Hua , Lv Xin
Published: November 2010

The iron tailings are the main source of solid waste of mining, as well as the potential resource. Regarding the characteristic and scale of iron tailings in China, this paper discusses the current situation and urgency of developing and utilizing of massive mining tailings, and the progresses of related researches on metal recovery, tailings processing and mutual utilization between tailings and mine-out stope. This paper also presents that using the tailing back-fill the mine-out stope currently is the best approach for massive resource utilization, based on sufficient metal elements recovery. This approach addresses the conflict of lands occupation due to the surface waste stacks, and gives the developing orientation of massive tailings resource utilization.
Research on Window Patterns' Layouts and its Expanded Application in Exploitation of Textile
Authors: Sui Jian Hua , Ge Yun Hu , Zhou Ting Ting , Hu Qi
Published: November 2010

We have analyzed the types of combined window patterns’ basic figures, their variations, and their regular layouts’ characteristics of 2×2 module. According to the jacquard and printed fabrics’ characteristics of the forms in use and the means of achieving the patterns, combined with practical cases, we studied and explored how to expand the layouts’ characteristics of combined window patterns to textile’s artistic design.
Experimental Study on New Technology for Solidifying/Stabilizing Papermaking Sludge
Authors: Ning Xu Nan , Li Shi Wen , Liu Jing Yong , Yang Zuo Yi , Ying Zhu
Published: November 2010

For better harmlessly treatment of papermaking sludge, a new technology for solidifying and stabling of sludge was studied. Papermaking sludge was solidified and stabilized by the solidifying agents including cement, powder fly ash (PFA) and cinder. The mechanical properties of solidified sludge block were evaluated by compressive strength, chemical oxygen demand (COD) and heavy metals concentration in the leachate from the solidified block were tested as well. When the solidifying agents has the following composition (cement 0.12kg/kg, PFA 0.02kg/kg and cinder 0.10kg/kg respectively), and the curing time was 6ds, the compressive strength of the solidified sludge blocks reached 360kPa. The results showed that cement and cinder were all positive in the compressed strength of sludge block. If they were mixed with PFA together, they could enhanced the solidification of organic and heavy metals in the sludge. Under this conditions, the COD in leachate from the solidified block was 115.7 mg/L, and the heavy metal concentration had reached the related national standards, after 6ds of curing time, water ratio of the solidified block kept from 35% to 40%, which met the prescribed standards of landfill.
Using Symplectic Schemes for Nonlinear Dynamic Analysis of Flexible Beams Undergoing Overall Motions
Authors: Cheng Jian Lian , Zhao Tie Shuan
Published: November 2010

In this paper, we developed a high-fidelity model to handle large overall motion of multi-flexible bodies. As a demonstration, the model is applied to a planar flexible beam system. An explicit expression of the kinetic energy is derived for the planar beams. The elastic strain energy is described via an accurate beam finite element formulation. The Hamilton equations are integrated by a symplectic integration scheme for enhanced accuracy and guaranteed numerical stability. The Hamilton and the corresponding Hamilton’s equations of beam vibration problems are formulated. It appears that the proposed symplectic finite elements are capable of providing accurate and robust simulation in the dynamic modeling of multi-flexible bodies systems with large overall motions.
Study on the Algorithm of Tool Compensation for Rotary Center Offset in 5-Axis Machining
Authors: Zhou Kui , Yu Si Tu , Xu Ming Heng , Xiao Shi De
Published: November 2010

In 5-axis NC machining, if the worktable rotary center or the cutting tool swivel center offset, in program blocks, the cutting tool position will also change and the compensation is needed. The author studies the mathematic relationship among the rotary center offset values, rotary angle A, B and C and the cutting tool position compensation values and designs the computer automatic processing algorithm which can rapidly and accurately calculate the compensation values for position change of the cutting tool and amend the cutting tool position in program blocks so as to obtain a practical NC program.
Semantic Web Service Based Framework for Inter-Organizational Business Process Management
Authors: Wang Ming Wei , Zhang Shu Sheng , Zhou Jing Tao
Published: November 2010

To support business and engineering collaboration in the diversified and global markets, enterprises are trying hard to continuously align their actual business processes to response customers’ demands. In this context, a flexible framework for inter-organizational process management is proposed, in which ontologies and semantic web service technologies are used throughout process modeling, implementation and execution. Heterogeneous manufacturing resources are encapsulated as uniform semantic web services, called manufacturing services, which are published, located and combined into executable processes. By means of formally definition of service capacity and as the mediation, business logic and implementation techniques is loosely coupling relationship, so enterprises can collaborate without prior relationship established and adjust their processes on demand.
Effect of Process Parameters on Solid Fuel Briquette of Rice and Soybean Straw
Authors: Chen Nai Chao , Ren Jian Xing , Zhan Peng , Xu Zhi Cheng
Published: November 2010

The compressive experimental produce is assigned to measure the compressive force, moving compressive length and their time consumption for the purpose of obtaining the quality and economical solid fuel briquette of rice and soybean straw. The two compressive processes are proposed in the analysis of the first compressive process. The results show that for the rice straw, the second compressive process is favorable for fabricating solid fuel briquette. While the hard soybean stems are intend to become the soft stems due to the presentation of broken stems under the high compresses in the first compressive process. The experiment reveals that the soft and hard stems of biomass feedstock shows the different properties which should be paid vital attention when design the pelletisers.
Research on the Cutting of High Nitrogen Austenitic Stainless Steel
Authors: Pang Xue Hui , Zhang Xiao Yan
Published: November 2010

The high nitrogen austenitic stainless steel is a kind of difficult-to-machine material. On the basis of material properties analysis, and through comparison test of tool wear resistance, this article made a study on the typical wear & breakage patterns and wears mechanism of insert during the cutting process, and made an analysis on the affection of the mechanical properties of tool materials of various brands to the cutting technological parameters. The results show that the tool wear and breakage are mainly expressed as adhesive wear of rake face and micro chipping of end cutting edge. Compared with the other inserts, YG8 has the best property and a longest life span within the 50~75 m /min cutting speed range.
Optimal Selection of Machining Parameters for Multi-Pass Turning Operations
Authors: An Li Bao
Published: November 2010

In this paper, the parameter optimization problem for multi-pass turning operations is studied. A mathematical model based on the minimum production cost criterion is developed. The unwanted material is removed by one finishing pass and at least one roughing passes depending on the total depth of cut. Maximum and minimum allowable cutting speeds, feed rates and depths of cut, as well as tool life, surface roughness, cutting force and cutting power consumption are constraints of the model. Optimal values of machining parameters are found by three methods: integer programming, nonlinear programming, and genetic algorithms. An example is presented to illustrate the effectiveness of the optimization model and solution methods. The model generates lower unit production costs compared with the results from the literature and machining data handbook.
Properties of ZrO2-C Materials with Anti-Oxidants
Authors: Liu Guo Qi , Li Hong Xia , Qian Fan , Yang Wen Gang , Yu Jian Bin , Ma Tian Fei
Published: November 2010

Submerged Entry nozzle is one of the key functional refractories for continuous casting and the safe and efficiency of the continuous casting is directly influenced by the properties of ZrO2-C materials located at the slag line of the submerged entry nozzle. In general, a little anti-oxidants such as SiC, Si or B4C will be introudced into ZrO2-C materials and anti-oxidants also influence the corrosion resistance of ZrO2-C materials. So this paper researched the properties especially the corrosion resistance of ZrO2-C materials with SiC, Si or B4C additions. The results show that the properties of ZrO2-C materials are relate to the composition of ZrO2-C materials and the corrosion resistance of ZrO2-C materials have no obvious relationship with other properties such as apparent porosity, bulk density, et al. The addition of anti-oxidants will all decrease the corrosion resistance of ZrO2-C material. The decreasing degree of corrosion resistance by Si is the most and the decreasing degree of corrosion resistance by SiC is the least. The corrosion resistance of ZrO2-C material with B4C addition is relate to the kind of the mold slag. To obtain the ZrO2-C material with excellent corrosion resistance antioxidants should not be added into ZrO2-C materials.
Alkali Activation of Granulated Blast Furnace Slag
Authors: Jin Zi Qiao , Lu Xian Jun , Hu Shu Gang
Published: November 2010

In order to stimulate the potential cementitious property of granulated blast furnace slag (GBFS), the ground GBFS sample (Wei Fang Iron and Steel Corporation, China) was activated by lime and gypsum under different dosages. The results showed that lime is an effective activator for the slag, and the optimum dosage of lime is about 10% (w/w) of the slag. At the optimum dosage of lime, the 28 days compressive strength of the lime-slag paste is higher than that of 32.5 ordinary Portland cement (OPC). But, the early age strength (3 and 7 days compressive strength) of the lime-slag paste is lower than that of the OPC. Addition of gypsum can effectively improve the early age strength of the lime-slag paste. At the ratio of gypsum:lime:slag of 8.2:9.2:82.6 (w/w), both the early and long-term compressive strengths of the gypsum-lime-slag paste are higher than that of the OPC. According to XRD, TG-DTA and SEM detections of the hydration products of the lime-slag paste, the gypsum-lime-slag paste and the OPC paste, it reveals that the hydration process of the GBFS-based cementitious material is different from the ordinary Portland cement and the presence of ettringite (AFt) contributes to the early age strength of the pastes. The major hydration product of the OPC paste (<7 days) were measured as ettringite (AFt), but the AFt phase was not detected in the hydration product of the lime-slag paste and the major hydration product of the lime-slag paste was determined as amorphous CSH gel. However, AFt was detected in the hydration products of the gypsum-lime-slag paste in the early stages of hydration, and the formation of AFt is favorable for the early strength improvement of the material.
Flotation Research on Dolomite-Containing Magnesite Ore
Authors: Yin Wan Zhong , Li Qiang , Ma Ying Qiang
Published: November 2010

China has the largest magnesite reserve in the world. However, the high-grade magnesite resources are decreasing significantly with the development of the resources’ consumption. The treatment of the low-grade magnesite ore is becoming more important and of much interest to researchers. In this paper, the floatability of several pure minerals including magnesite, dolomite, and quartz and their interactions when using different collectors were investigated. In the flotation system of lauryl amine, compared with magnesite, the floatability of dolomite was higher, but was much lower than quartz. In the flotation system of sodium oleate, magnesite and dolomite had good floatability but quartz could hardly be floated. Sodium hexametaphosphate inhibited dolomite more strongly than magnesite. When pH was above 9, the inhibitory effect on two minerals was attenuated, and in the pH range of 9~12, the inhibitory effect of sodium silicate on dolomite was very strong, while magnesite still had good floatability. Magnesite and dolomite crystal structure similar and the mass contents of surface oxygen were respectively 52.42, 48.65. relative density that was the ratio of metal cation to anion （∑Mn+/∑O2-）, respectively: 0.3264,0.4327. The mass contents of surface oxygen and relative density affected the surface electric properties, and therefore the isoelectric point of dolomite was higher in solution.Based on crystal chemistry formulas, the Mn+-O2- bond parameters were calculated. The electronegativity of O linked with Ca in dolomite was much higher than that linked with Mg in magnesite and dolomite. Because of the strong electrostatic forces, the floatability of dolomite was higher in the flotation system of lauryl amine. As the solubility product of calcium oleate is bigger, the floatability of dolomite which compared to magnesite is much higher in the flotation system of sodium oleate. After the flotation experiments of pure minerals, a novel flotation system for recovering magnesite concentrate from low-grade magnesite ore was developed. For run-of-mine ore produced in Liaoning China, the results of flotation experiments showed that a magnesite concentrate containing 46.94 percent MgO, 0.30 percent SiO2, 0.76 percent CaO can be produced and 76.02 percent of the magnesite can be recovered through the process.
Flotation Research of Three Polymorph of Serpentine Minerals
Authors: Zhao Li Bing
Published: November 2010

It is known that serpentine slimes coating on the sulphide surfaces are responsible for the poor metallurgy. Antigorite, lizardite and chrysotile are three kind of important polymorph of serpentine minerals. The three serpentine minerals usually accompany with Sulfide minerals, having ions with equal activities or similar properties on the surface, which makes the flotation separation difficult. This paper was to identify the effect of ethyl xanthate interactions on the flotation of three kind of polymorph of serpentine minerals.
Cementing Property of Cement with Desulfurization and Skimming Slag Tailings Powder
Authors: Han Yue Xin , Li Li Xia , Liu X. , Song Ning Bo , Wang Yu Bin
Published: November 2010

With the purpose that the desulphurized and skimming slag tailings powder from Ansteel replaces part of cement, water requirement of normal consistency, soundness, setting time and strength of cement with desulphurized and skimmed slag tailings was researched respectively in this paper. Results demonstrated that both of the compressive strength and the rupture strength of cement mortar of 3 and 28 concrete age decreased gradually with the amount of tailings increase, and what resulted in strenghth decreased was also investigated, It was shown that suitable amount of tailings to be blended was limited to 30 wt.%.
Plasma Surface Modification of Silica and its Application in Epoxy Molding Compounds for Large-Scale Integrated Circuits Packaging
Authors: Yang Ming Shan , Li Lin Kai , Zhang Jian Guo
Published: November 2010

The surface modification of silica for epoxy molding compounds (EMC) was conducted by plasma polymerization using RF plasma (13.56MPa), and the modification factors such as plasma power, gas pressure and treatment time were investigated systematically in this paper. The monomers utilized for the plasma polymer coatings were pyrrole, 1,3-diaminopropane, acrylic acid and urea. The plasma polymerization coating of silica was characterized by FTIR, contact angle. Using the silica treated by plasma as filler, ortho-cresol novolac epoxy as main resin, novolac phenolic-formaldehyde resin as cross-linking agent and 2-methylmizole as curing accelerating agent, the EMCs used for the packaging of large-scale integrated circuits were prepared by high-speed pre-mixture and twin roller mixing technology. The results have shown that the surface of silica can be coated by plasma polymerization of pyrrole, 1,3-diaminopropane, acrylic acid and urea, and the comprehensive properties of EMC were improved.