bluuebunny/crossref_metadata_2025 huggingface dataset:
The Key Problems in the Manufacturing of the Bamboo Buffer Packaging Material
Authors: Liu Ye , Qi Shu Yan , Shi Zheng Ying
Published: August 2011

In this paper,bamboo pulp was chosen as the raw material on the basis of the researching on the structure and properties of the resource-rich bamboo fibers, the foaming material using the bamboo pulp and other assistants were obtained.It developed bamboo's new applied area and supplied the cushioning industry with a new choice.The best reagent and the optimal ratio of the various components have been identified by the quality evaluation system. Studied on the high efficiency and no polluting foaming mechanism to determine the parameter of foaming technics. Determined the interior adhesive and exterior disposal.Conducted the structural analysis and mechanical properties testing, and in compare with the performance of common cushioning material,we know that: Material has a certain buffer performance and for the packing of the products with small shock fragility.
Microstructures of Graphite/Copper Composites Prepared by Mechanical Milling and Hot Extrusion
Authors: Jin Yong Ping , Hu Ming
Published: August 2011

To obtain graphite/copper composites with excellent microstructures, preparation process including mechanical milling, compact compressing, vacuum hot pressed sintering and hot extrusion had been put forward. Effect of milling time and hot extrusion on microstructures of composites had been analyzed and investigated by optical microscope. The results show that after mechanical milling, refined and uniform distributed graphite phase could optimize microstructures of composites. While increasing extrusion ratio, graphite particles and graphite fibers in longitudinal cross-section of composites could be refined effectively. Under of the same conditions, grain size of copper in graphite/copper composites is larger when raising extrusion temperature.
Synthesis, Characterization and Luminescence of Europium, Terbium Complexes of 1,1'-(Pyridin-2,6-Diyl) Bis-3-P-Tolylpropane-1,3-Dione
Authors: Zhu Jin Liang , Liu Sheng Li , Yu Liang Cai , Ouyang Tao
Published: August 2011

A new ligand, 1,1'-(pyridin-2,6-diyl)bis-3-p-tolylpropane-1,3-dione(H2L), was prepared and its crystal structure displays its enol isomer. The binary complex, Ln2L3·4H2O [Ln = Eu(III) and Tb(III)], were synthesized by the reaction of synthesized ligand (H2L) and Ln(III). With 1,10-phenanthroline (Phen) as the synergistic ligand, the ternary complex, Ln2L3(Phen)2 [Ln = Eu(III) and Tb(III)], were synthesized. The compounds were characterized by 1H-NMR spectroscopy, MS, IR, UV, DTA-TG and fluorescence spectrum. The luminescent properties of the ligand and its complexes were investigated and the results showed that the prepared ligand was a good luminescent compound, all complexes emitted characteristic luminescence of corresponding lanthanide ions and 1,10-phenanthroline as the synergistic ligand can obviously enhance the luminescence of Eu(III) in the ternary complex.
Comparison between Vanadium Dioxides Produced by Ammonium Metavanadate and Vanadium Pentoxide
Authors: Qi Ji , Niu Chen , Xu Ying Mei , Hai Hua , Zou Lei
Published: August 2011

The facile processes were developed for synthesizing vanadium dioxide (VO2) by pyrolyzing ammonium metavanadate (NH4VO3) in nitrogen (N2) flow and by thermal reduction of vanadium pentoxide (V2O5) in ammonia gas. X-ray diffraction (XRD), scanning electron microscopy (SEM) and differential scanning calorimetry (DSC) were applied to analyzing the product VO2. The experimental results indicated that VO2microcrystal particles were successfully synthesized from both NH4VO3and V2O5. From NH4VO3the product VO2presents two kinds of micro morphologies, torispherical and pentagonal prism. The phase transition mainly takes place at 337.8K and 341.8K. The average enthalpy of phase transition is 28.82 J/g. From V2O5the product VO2presents rhombohedral. The phase transition temperature is approximately 342.6K and the enthalpy of phase transition is 44.90 J/g.
Electrochemical Polymerization of N-(9-Fluorenylmethoxycarbony)-Glycine and Characterization of its Polymers
Authors: He Yu , Guo Wen Juan , Zhang Guang You , Pei Mei Shan , Pan Qi Wei
Published: August 2011

Poly(N-(9-fluorenylmethoxycarbony)-glycine) (PFG) film was first synthesized on platinum wire by direct anodic oxidation of N-(9-fluorenylmethoxycarbony)-glycine (FG) in boron trifluoride diethyl etherate (BFEE). The oxidation potential of FG in BFEE was only 0.4 V vs. Pt. Therefore, BFEE can be an ideal supporting electrolyte for polymerization of FG. Scanning electron microscopy showed the morphology of PFG. The structure of PFG film was studied by FT-IR spectroscopy.
Advances in Biosensor Application for Environmental Monitoring
Authors: Yao Zhen Xing , Zhang Yong Fang , Fan Da Wei , Xin Xiao Dong , Zhao Jie , Chen Guo Dong , Du Bin , Wei Qin
Published: August 2011

A review is provided dealing with the definitions and classifications of biosensors, as well as their basic working principles. Then, their applications to the environmental monitoring, which include the monitor of biochemical oxygen demand (BOD), bacterial count and various organic and inorganic pollutants, e.g. nitrogen compounds, heavy metal ions, organophosphorus pesticides, phenolic compounds, toxic compounds, carcinogens, teratogens, benzenes, sulfur dioxide, aldehydes and ethanols are presented. In the end, some suggestions were given with respect to the current problems of biosensors and the future applications of biosensors were also discussed.
Effect of Finishing Temperature on Texture Evolution and Magnetic Properties in Heavy Cold Rolled High Silicon Steel Thin Sheets
Authors: Liu Jin Long , Sha Yu Hui , Zhang Fang , Yao Yong Chuang , Li Ji Chao , Zuo Liang
Published: August 2011

0.2mm-thick high silicon steel thin sheet under 94% cold rolling reductions has been successfully produced by conventional rolling method. Texture evolution during hot rolling, cold rolling and final annealing as well as magnetic properties has been investigated with emphasis on the effect of finishing temperature. It is found that a favorable strong {001}<210> recrystallization texture and evidently improved magnetic properties can be obtained at the finishing temperature of 900°C, which is in contrast with relatively strong detrimental {111}<112> and weak {001}<210> recrystallization texture at the finishing temperature of 700°C. Effects of finishing temperature can be explained in terms of the cold rolling texture due to different texture morphology in hot bands.
Die Optimal Design for a Large Diameter Thin-Walled Aluminum Profile Extrusion by ALE Algorithm
Authors: Liu Peng , Xie Shui Sheng , Cheng Lei
Published: August 2011

Extrusion process of a large diameter thin-walled aluminum profile was simulated by Arbitrary Lagrangian Eulerian (ALE) algorithm based on HyperXtrude software. The results show that the material flow velocity in the bearing exit of the initial design die is non-uniform. Three times modifications were performed and simulated. The optimal design with more uniform flow velocity in the bearing exit was obtained.
Fatigue Characteristic and Dislocation Substructure of A356 Casting Alloy under Multi-Axial Cyclic Loadings
Authors: Mo De Feng , He Guo Qiu , Liu Da Fu , Zhu Zheng Yu
Published: August 2011

Mechanical fatigue tests were conducted on specimens of A356-T6 casting alloys under multi-axial cyclic loadings with 5 loading paths (proportional, circular, square, diamond, and ellipse path). Optical microscopy and TEM were used to examine both undeformed and fatigue failure specimens. It is shown that undeformed material has coarse microstructure with low density of dislocation. Under every loading path, cyclic hardening dominates the whole fatigue process. Additional hardening is found in this casting material, but the rate and extent of cyclic hardening and additional hardening are quite dependent on particular loading paths. Various dislocation substructures are observed in the specimens including specimens fatigued to 20 cycles and fatigue failure specimens. While these dislocation substructures are determined by the moving ability of dislocation and interactions between dislocation and particles. Low cycle fatigue life is sensitive to the difference of loading paths, and the fatigue life increases as the extent of cyclic hardening decreases.
Fracture Energy of Reactive Powder Concrete Based on Uniaxial Tensile Test
Authors: Yuan Hai Yan , An Ming Zhe , Jia Fang Fang , Yan Zhi Gang
Published: August 2011

Based on uniaxial tensile test, the complete uniaxal tensile stress-strain curve of Reactive Powder Concrete (the steel fiber content by volume is Vf =1%, 2%) was obtained, and the fracture energy of RPC specimens with cross-section of 100mm by 100mm was calculated. The test was finished through Universal Testing Machine without any stiffness-strengthen devices. In order to solve the stress concentration problem, a self-designed uniaxial tensile test equipment was developed, and a dumbbell-shaped specimen was used in the test. The results indicate that the fracture energy of RPC increased as well as the increasing of Vf.
A High Throughput and High Selective Chemiluminescence Method for Quantification of Bifenthrin Based on Molecularly Imprinted Film
Authors: Zang De Jin , Ge Lei , Zhao Pei Ni , Yu Jing Hua , Huang Jia Dong
Published: August 2011

One novel highly cross-linked, shape-controllable molecularly imprinted sol-gel film (MISF) with good thermal and chemical stability and three-dimensional network porous structure has been developed. The binding characteristic of the imprinted film to bifenthrin was evaluated by equilibrium binding experiments and imprinting-induced promotion of binding. The MISF was modified into the wells of 96 micro-well plate combined with chemiluminescence (CL) technology to establish the molecular imprinting-chemiluminescence (MI-CL) sensor. The high throughput and high selective detection sensor of bifenthrin was applied in vegetable and food samples with satisfactory results.
Influence of Test Conditions and Couple Materials on Frictional Characteristic of Polymeric Materials
Authors: Jia Li Xiao , Zhang Yong Zhen , Niu Yong Ping , Du San Ming , Li Jian
Published: August 2011

Frictional characteristic of three kinds of polymeric material was studied by Mark II slipmeter under the condition of different couple materials and test conditions in order to understand the frictional mechanism of people’s walking deeply and decrease the probability of accidents caused by slips and falls. The results indicate that test conditions and couple materials influent friction characteristic of polymeric materials but the influence of test conditions is more significant. In the three test conditions, the friction coefficient of dry condition is highest and that of oil condition is lowest. The friction coefficient of polymeric materials on different floor samples had different trend indicated that there was interaction between shoe sole samples and floor samples.
Ammonium Polyphosphate with Crystal Form V by DAP+P2O5
Authors: Zhao Gui Xin , Liu Gou Sheng
Published: August 2011

Ammonium polyphosphate (APP) is a widely used intumescent flame retardant ingredient, it has six crystalline forms, APP-V is seldom studied in literature. In this study, APP-V was prepared by process of diammonium phosphate (DAP)+P2O5as raw material, and melamine as condensation agent under dry ammonia. Its properties such as water solubility was tested and compared with APP-II. Further characteristics techniques such as FTIR, XRD, and TGA were used to characterize this product.
Study on the Preparation and Properties of α-PbO2-CeO2-TiO2 Composite Material on Aluminum-Matrix
Authors: Chen Bu Ming , Guo Zhong Cheng , Huang Hui
Published: August 2011

Composite α-PbO2coatings with addition of different solid particles were prepared on A1/conductive coating electrodes in 4M NaOH solution with addition of PbO until saturation by electrochemical anode composite electrodeposition technology, doping with different TiO2and CeO2nanoparticles. The optimum formula and operating condition of the composite electrode material were obtained as follows: adding PbO solid to 4M NaOH until saturation, TiO215 g/L; CeO210g/L, temperature 40°C, current density 0.5A/dm2, electrodeposition time 4h. On this condition, the PbO2-(3.77wt%±0.4%)TiO2-(2.13wt%±0.4%)CeO2composite coating can be obtained.
Influences of Polymer Fiber and Polymer Latex on Physical Properties of Cement Mortar
Authors: Song Sheng Hui , Liu Fu Tian
Published: August 2011

Two kinds of polymer fiber and polymer latex are used to improve the toughness and bondability of cement mortar. The influences of the fiber and latex on the compressive and flexural strength, compressive strength-ﬂexural strength ratio (CS/FS), bond ﬂexural strength and compactedness of the hardened mortar were studied. The results showed that both of the latex and fibre can improve the compressive and flexural strength of mortar in low content, decrease the CS/FS, and then improve the toughness significantly. The bond flexural strength of mortar can be improved by 40-50% when the latex is added. The effect of fibre-latex added together was better than that of two matters added separately. The optimized components for Fibre-Latex hybrid were: 0.28% of PVA+5% of ACE.
Preparation of Low-Heat Portland Cement Clinker with Coal Gangue
Authors: Chen Guang Li , Fu Xing Hua , Tao Wen Hong
Published: August 2011

A kind of low-heat Portland cement clinker was prepared with coal gangue, limestone and gypsum through optimizing the mix proportion of raw materials, and its properties and hydration characteristics were studied. The results showed that the cement clinker meeting the demands of mid (low)-heat Portland cement standard could be prepared with 35% (by weight, the same below) coal gangue, 57-60% limestone and 6-8% gypsum. The raw materials were burned at 1380°C for 40 minutes. The main hydrates were calcium silicate hydrate (C-S-H) gel, ettringite (AFt), monosulfate (AFm) and Ca(OH)2.
Study on Integral Utilization of Alkaline Slag and Fly Ash
Authors: Wang Shu Xuan , Li Ning
Published: August 2011

The compressive strength of the cementitious materials doubly with alkaline slag and fly ash are investigated in this paper. The optimum mixing way and ratio of weight were found. The hydration properties of cement binders with alkaline slag and fly ash are studied using XRD and SEM. The result shows that alkaline slag can stimulate the activity of fly ash, increase the hydration velocity of clinker mineral and improve the second hydration of fly ash.
Research on Air-Structure Coupling Characteristics of Sounding Board
Authors: Pei Shan Bao , Liu Rong Zhong
Published: August 2011

According to the characteristics of the shape of sounding board, the structure is immersed in gunpowder pulsation flow, the virtual mass method can be used to research on sounding board. The 3-dimensional element is used to discretize the sounding board and its surrounding air, the gas is coupled with the structure directly by the gas mass matrix. The coupling motion equation model of the sounding board and its surrounding air can be derived.The coupling modal of the sounding board system is calculated by using the software of ansys, and the data of gunpowder explosion pressure pulsation is obtained from the calculation in autodyn, then the frequency and modal of the sounding board system were further analyzed in the software of ansys. The results show that there are some significant changes in the frequency and modal of the sounding board system under the condition of prestress as well as the air-structure coupling of gunpowder pulsation fluid flow.
Design of pH Testing System Based on ARM
Authors: Zhuang Shen Zeng , Wang Xiao Fei , Wang Yan Lin
Published: August 2011

The pH measuring instrument is mainly applied to measure the pH value of the solution, widely used in industry, agriculture, scientific research and environmental protection. The paper proposes a pH measuring system based on ARM.The measuring dataes of the pH composite coloured glaze electrode and the temperature sensor are put into ARM ADC channels , displaying the results of the pH and the temperature after analysing. Touch screen can operate corresponding actions,such as beginning,selecting,confirming. This instrument uses safely,can monitor real-time and fixedly , higher precision,which can be used in agricultural.
Test Research of Pipeline Spraying Constant Pressure Controlling in Orchard
Authors: Song Shu Ran , Ruan Yao Can , Li Zhen , Hong Tian Sheng , Zhang Cheng
Published: August 2011

The spraying efficiency can be greatly improved by using pipeline spraying in larger orchard, meanwhile, labor strength could be reduced greatly and the pest control efficacy could be improved. Adopting constant pressure control devices can improve the stability of liquid pressure in pipeline, reduce the liquid pressure fluctuation which caused by the changing of spraying nozzles number. The spraying experimentations were carried in orchard by using constant pressure controller. Experimental result indicated that, using the constant pressure control device, the control error was 0.0167Mpa, the pressure control stability was 98.33%, the downtime to prevent pipeline bursting was 8.04s and the downtime after pipeline burst accidently was 8.88s. Using constant pressure controlling, stability of liquids pressure in the pipeline could be guarantee and pipeline bursting could be prevented at the same time.
Tracking Control of Robot Manipulator Based on Robust Neural Network Control
Authors: Wang San Xiu , Yang Guang Ying
Published: August 2011

This paper presents a robust neural network control scheme for robot manipulator. The robust controller is employed to eliminate the effect of the uncertainties, and a neural network is utilized to learn the unknown uncertain upper bound, which improves the performance. The experiments have been implemented and demonstrate the validation of the proposed method.
Design and Implementation of MDO Integrated System for Valve Products
Authors: Dai Ye , Lai Yi Nan , He Xi Bin , Ren Sheng Le , Li Da Meng
Published: August 2011

In view of the demands in multidisciplinary design optimization (MDO) of valve products, the MDO model for valves is established, which takes account of mechanical analysis, fluid mechanics analysis, thermal-mechanical coupled analysis and seismic analysis. On this basis, the MDO integrated system is constructed combined with some new techniques to solve the common and critical problems of optimal design of valves. The system takes interplay and coupling of each discipline into account, applies effective optimization strategy, information transmitting and concurrent design to get the synergistic effect produced by interaction of each discipline, and finally obtains the total optimum solution of valves, which, moreover, could provide technical reference for the practicality and commercialization of the integrated system in valves design optimization.
Seismic Response Analysis of Partial Curve Long-Span Rigid Frame Bridge with Super High Pier
Authors: Liu Yang , Wang Da , Chen Min Hai
Published: August 2011

Based on the time history analysis method, some curve long-span rigid frame bridge with super high pier in Sichuan was taken as the studying case, and a studying of natural vibration characteristics and seismic response. Comparative study was emphasis carried on seismic performance between the partial curve bridge and the straight. In addition, the exhaustive research to about between crosswise relation to the structure overall rigidity contribution and to the structure and the seismic performance influence is conducted. The conclusion of the study shows that the seismic performance of the straight long-span rigid frame bridge with super high pier is surpassing the curve bridge. The curve linear has little influence to the base frequency of this kind of structure, and The rigidity is mainly effected by the bridge pier. If additionally builds the crosswise relation between the structure, the dynamic characteristic of the structure will be improved greatly. The height of this type bridge has great influence on the dynamical stability, the height is lower and the dynamical stability is better, which is more advantageous to the structure seismic behavior.
Calculation about the Fundamental Wave Amplitude of the Current in the Distribution Line on Wavelet Analysis
Authors: Chi Chang Chun , Chen Jian Wei , Wu Yi
Published: August 2011

Wavelet analysis, as a new kind of time-frequency representation technique, has made great progress recently and been applied widely in different engineering practice. To solve the problem of full-wave Fourier algorithm which is disable to filter decaying DC component and has worse frequency characteristic, it is presented an improved algorithm depending on the combination of subtraction filter and full-wave Morlet complex wavelet, to get out the fundamental wave amplitude of the current in the distribution line, by studying each parameter’s influence on the performances of Morlet complex wavelet algorithm. It can filter decaying DC component efficiently and has better frequency characteristic.
Embedded Machine Tool CNC System Based on the ARM and MCX314
Authors: Song Xian Chen , Zhou Qing Hua
Published: August 2011

CNC(Computer Numerical Control) machine tool is the foundation and core of modern manufacturing systems, advanced CNC technology is the key to sustainable development of machine tool manufacturing industry. This thesis presents ARM as the main chip, motion control chip MCX314, the operating system using μC / OS-II, to build a CNC system development hardware platform and software platform, to explore the new ways for numerical control system development and design. This thesis can be divided into: CNC system hardware platform structures, including ARM and external hardware selection, hardware interface design and testing; MCX314 hardware platform design and testing; Software Platform, including the use of real-time operating system μC / OS-II to achieve the mission of the NC system, scheduling, management, μC / OS-II transplantation on ARM; MCX314 hardware platform building and testing; application framework built , program design and testing. Test results showed that: ARM as the main chip, MCX314 as a motion controller of the CNC system is feasible, its motion performance can meet the design requirements.
A Unified Reliability Modeling Approach for Mechanical System and Complex Component
Authors: Xie Li Yang , Yan Shao Ze
Published: August 2011

With the scenario of reliability estimation, a geometrically complex mechanical/structural component with multiple damage sites should be treated as a system, since there are many links (damage sites) of similar failure probabilities on any of such a component and the failures of the individual damage sites are not perfectly dependent of each other. Conventional system reliability model is not applicable to such a system because of the statistical dependence among the element (damage site) failures. To estimate the reliability of a mechanical system (or a complex component) in which element (damage site) failure dependence plays an important role, a model capable of reflecting the effect of element failure dependence is necessary. The present paper develops models which can deal with multiple damage sites and multiple failure mechanisms, reflect the dependence among element failure events and that among different failure modes. Such models are applicable to both typical mechanical systems and various components.
Information Fusion Technology and its Application to Intelligent Control System of Ceramic Kiln
Authors: Zhu Yong Hong , Zhang Xiao Hong
Published: August 2011

This paper applies multi-sensor information fusion technology to intelligent control system of ceramic kiln and proposes a corresponding control scheme. The control scheme is composed of six-layer structures which include four subsystems. Then, compositions, functions and adoptive algorithms of the four subsystems are analyzed. In the end, the whole system control scheme and its work process are analyzed.
Contact Model of Sealing Surfaces for Flange and Metallic Gasket Based on Fractal Theory
Authors: Feng Xiu , Lu Feng , Shen Guo Liang
Published: August 2011

Metallic gasket seals are widely used in pressure vessels and piping. The failure of sealing systems is mostly caused not by the strength of flanges or bolts but by the leakage of the connections. The contact area of sealing surface has a major influence on the leakage of the bolted flange connections. The contact model of sealing surfaces of the flange and the metallic gasket was established on the basis of the modified M-B model, and the relationship between the contact area and the compressive stress is obtained. It’s found that the bigger the compressive stress, the bigger the contact area. When the compressive stresses are identical, the bigger fractal dimension and the less scale coefficient, the bigger the contact area. These can be used in the evaluation of sealing behavior of metallic gaskets.
The Method for the Accuracy Improvement of STL Offset Model Based on Vertex Offset
Authors: Zhu Hu , Li Nan , Liu Zhi Jun
Published: August 2011

On the basis of the analysis for the reason that causes the errors of the vertex offset, the accuracy improvement method for the STL offset model which was generated by the vertex offset algorithm was proposed by using the surface subdivision algorithm based on the center of gravity on triangular facets. The offset point of the center of gravity was generated by offset the center of gravity along the normal vectors of the triangular facets on which the center of gravity is located, and the new triangular facets are formed by connecting the offset points of the center of gravity and the offset vertexes of the triangular facets so that the more accurate offset model to be built. The case study shows that the proposed algorithm has higher accuracy than the existing vertex offset algorithm.
Clothing Design Based on Comfortability
Authors: Li Zhe
Published: August 2011

The clothing designing is a creative technique activity. It belongs to the industrial art design category, has the general characteristic of industrial art design, namely utilizing certain material, through necessary craft processing to create ornaments and utilities with esthetic sense. The humanization design has become the focus of attention in design domain, therefore the clothing designing should not limit in the presentational formal beauty, but take clothing comfortability into consideration. Only considering clothing comfortability and esthetic sense as a whole, can the clothing designer enhance the rationality and the scientificalness of the design.
Constructing Power-Aware Multicast Virtual Networks
Authors: Qi Ning , Wang Bin Qiang , Yuan Bo , Zhang Bo
Published: August 2011

Power consumption of Internet is becoming more and more a sensible problem, which is of interest for both the research community and the general public. In this paper we have formally defined the power-aware multicast VN construction problem and setup an ILP model whose objective is to find a virtual topology on top of substrate network fulfilling all restrictions, while the power consumption of construction is minimized. In order to address the problem efficiently we develop a greedy algorithm: PMVNMH. The efficiency of the power-aware construction algorithm is evaluated by emulation experiment.
An Application of Estimate Expert System Technology for Burrless Rubber Mould Manufacturing Process
Authors: Park Sang Bong
Published: August 2011

Rubber products have durable, lightweight, and shockproof properties, which allow them to be used in various industries. As demand on products with elaborate shape and parts and minimized occurrence of burrs has increased in high-precision industries, particularly in IT, BT, and NT, moulding technology becomes an essential technology to develop core objects composing frames for assembly and elementary parts that produce ultra small machines and basic components of MEMS and NEMS. Despite the technological demand, rubber-related moulding technology has not been standardized, and its total process – shaping, design, production, and test – has not been systemized, which results in low productivity in rubber products. This study is to standardize and systematize the rubber product production process by evaluating the cost estimation of moulding production process and to improve occurring problems during the process. The subject of the study was burrless rubber product moulding process.
Adsorption of Heavy Metal Ions by Chelate-Fiber Prepared by Chemical Surface Modification
Authors: Liu Xin Liang , Wang Li Jun , Chen Yong Li , Chen Nan , Wang Shuang Fei
Published: August 2011

The bagasse fibers were activated by alkalize and etherified. 1,2-ethanediamine and carbon disulfide were used to modify the etherify fiber to get the chelate-fiber contained sulfur and nitrogen. The FTIR was used to characterize the xanthated aminating-fiber (XAF). The mechanism of sorption properties for heavy metal ions were studied. As the results shown, the optimal process to prepare the XAF was that the reaction time, concentration of NaOH and dosage of CS2 was 60min, 12% and 2mL, respectively. The chelate-fiber containing sulfur and nitrogen possessed high adsorption capacities for Cu(II) and the mechanism of sorption fitted the pseudo-second-order model well.
Study on Ride Comfort of ATV with Three Wheels Based on Rigid-Flexible Coupling Systerm
Authors: Huang Ze Hao , Lu Xu Sheng , Xu Wen Qiang , Sun Zhang Dong
Published: August 2011

In this paper, the ride comfort of the ATV( with two wheels in the front and one wheel in the rear) is the research object. The software of hypermesh and asams establish rigid-flexible coupling dynamics model and simulate the ride comfort. After the comparative analysis between the vehicle ride comfort and four-wheel all -terrain motorbike, its ride comfort has been optimized.
Research for Virtual Prototype Modeling and Simulation of Bridge Crane Based on Pro/E and ADAMS
Authors: Qin Dong Chen , Liu Zhu Li , Zhu Qiang , Chen Jiang Yi , Wang Ying Jia
Published: August 2011

According to the crane dynamics theory, the dynamical model of a bridge crane's three main mechanisms is established and the dynamical load is determined under different work conditions in the paper. The three-dimensional solid model of the bridge crane is built by Pro/E, and then which is imported in ADAMS through the interface module of Mech/Pro. The virtual prototype model of the bridge crane is formed in ADAMS when relevant constraints and loads are applied. Based on the model, the bridge crane’s kinematics and dynamics performances are simulated and analyzed, and which shows that the simulation results can provide valuable guidances for design of the bridge crane.
Stiffness and Nature Vibration Analyses of Linear Guideway Type
Authors: Li Wei , Tsai Gwo Chung , Li Wen Zhuo , Horng Thin Lin
Published: August 2011

This study investigated the solution of the rigidity and structural vibration for system of linear guideway type based on ANSYS workbench. By comparing the results derived from the simulation of the model and the corresponding theoretical results, the validity of the theoretical solution can be verified. The analysis includes the system rigidity and the natural vibration frequency in the direction of vertical slider (Vertical), rolling (Rolling) and swing (Pitching), the structural vibration frequency for system of linear guideway type is carried out, the model is built according the true dimensions, what is more, the rollers are not necessary replaced by springs, because there is not so much difficulties by using ANSYS workbench and more accurate results can be obtained in this way. Two different types of simulation are carried out, and the simulation results show that different geometric sizes of slider, which mean different numbers of rollers, will change the resonance frequencies and mode shapes, and more rollers can enhance the stiffness of the LGT model, then reduce the possibility of resonance happening.
Dynamic Research on Vibration-Impact Crushing System of a Bilateral Single-Mass
Authors: Ni Su Huan , Chen Qing Guo
Published: August 2011

The vibrating roller crusher convert relative vibration generated by two rigid bodies to bring high-frequency impulse on grain layer (or granular) in chamber, which makes grain crush to particle. Based on the science of vibration, dynamics model in vibration-impact crushing system of a bilateral single-mass and vibration differential equations are established. By dynamic analysis, amplitude frequency curve, hysteresis impact curve and energy absorption curve are all founded. The curves on dynamic response are discussed. Under the consideration of their results, displacement, velocity and acceleration with the time history are induced. Impact on the left and right sides are unsymmetrical. Influence laws on amplitude frequency, impact, energy absorption from clearance and vibration frequency is also established.
Simulation Analysis on Passing Curve of Urban Track Vehicle
Authors: Zuo Yan Yan , Chang Qing Bin
Published: August 2011

In order to study the curve passing performance of urban track vehicle and to evaluate its safety, the calculation model was established and simplified. Then track irregularity was used as input and passing curve was set up. The simulation modal was produced with software SIMPACK. With the track irregularity, the traveling safety of the vehicle was analyzed. The simulation results show that the traveling safety of the track vehicle could satisfy the requirement of relevant standard.
Kinematic Analysis of a Novel Manual Medical Instrument for Minimally Invasive Surgery
Authors: Wang Xiao Fei , Li Jian Min , Zhang Guo Kai
Published: August 2011

This paper presents a novel compact manual instrument for minimally invasive surgery (MIS). The instrument possesses several good features, such as large workspace, high flexibility, low friction and comfortable operability. The structure of the instrument is a basic configuration of some manual instruments. Besides basic operations, it can be applied to accomplish some more difficult processes, e.g. suturing and knotting. Based on screw theory and product-of-exponentials (POE) formula, the degree of freedom (DoF) and kinematics of the instrument are analyzed in the paper. The calculation results are verified by the simulation.
Design and Fabrication of Wafer Level Dual-Band Thin Film Bulk Acoustic Resonator Filters
Authors: Chang Wei Tsai , Chen Ying Chung , Cheng Chien Chuan , Kao Kuo Sheng , Lin Re Ching , Li Jia Ming
Published: August 2011

This paper describes the design and fabrication of dual-mode film bulk acoustic resonator (TFBAR) devices to construct wafer level dual-band T-ladder type filters. The T-ladder type filters is selected in this study for its high quality and simple fabrication processes. The c-axis-tilted ZnO thin films to obtain dual-mode TFBAR devices have been investigated. The characteristics of dual-mode TFBAR devices appeared by off-axis deposition of ZnO thin films with the RF magnetron sputtering. The top and bottom electrodes consisted of titanium (Ti) and platinum (Pt) layers are deposited by dual-gun DC sputtering system. The pass-band width of filters is controlled by the mass loading on the dual-mode. The frequency response is measured using an HP8720 network analyzer and a CASCADE probe station.
Configuration Design and Displacement Analysis of a Novel Decoupled 3T2R Parallel Robot
Authors: Shi Zhi Xin , Ye Mei Yan
Published: August 2011

Based on the control decoupled principle and approach of Position and Orientation Characteristic (in short, POC) set, a novel decoupled parallel robot with 3-Translation and 2-Rotation (in short, 3T2R) outputs has been presented in the paper. And the topological structure of this new mechanism is fully decoupled, which have the advantages of easily control, simple kinematic analysis, and so on. Then the structure and displacement analysis of this novel parallel robot have been accomplished. The research provides theoretical basis for design and practical applicability of this novel parallel robot.
Trajectory Planning Research of Spherical 2-DOF Parallel Manipulator with Actuation Redundancy
Authors: Li Yong Quan , Zhang Li Jie , Liu Ying
Published: August 2011

This paper present formation principle of any spherical trajectory curve, and kinematic track of spherical 2-DOF parallel manipulator with actuation redundancy was planned by trajectory planning method that acceleration is continuous segmental function in Cartesian space, in order to guarantee that angular displacement, angular velocity and angular acceleration curve is smooth and continuous, and forward kinematics was simulated by virtue of ADAMS software. At the same time, based on dynamic analysis, smooth and continuous driving torque curve of three actuated joints were obtained by force optimization method. This kind of trajectory planning method laid the foundation for redundant actuation control of the manipulator.
The Design and Comparison Study on the Large-Scale End-Effector of Large Space Manipulator
Authors: Feng Fei , Liu Yi Wei , Liu Hong , Cai He Gao
Published: August 2011

The space manipulator which is mounted on a space structure or spacecraft to manipulate space payloads is important for the on-orbit-servicing. Its manipulation tasks depend on its end-effector. The flexibility of the large space manipulator will result in residual vibration on its tip, and let the manipulator have poor capability of end positioning. To overcome the drawbacks mentioned-above, the end-effector needs strong capability of misalignment tolerance and soft capturing. On the base of these requirements and analysis, two kinds of end-effector schemes are presented and designed in detail. The essential performances are in comparison based on the results of dynamic simulations and experiments. Consequently, the conclusion is drawn that the steel cable-snared end-effector which captures the interface by winding the grapple fixture probe, is the best scheme that can combine the ability of soft capturing and great misalignment tolerance perfectly.
Design of Optimal Controller for Dynamic Positioning System
Authors: Yu Pei Wen , Chen Hui
Published: August 2011

The paper presents a method to design a LQG controller for dynamic positioning system. It is assumed that these are corrupted with white noise hence a Kalman filter is applied to observe the ship motion exposed to environment disturbances like wind, wave & currents, The simulation results show that the performance of the filter and controller are suitable, and the method is practicable .
Type Synthesis of Symmertrical Non-Overconstrained 3-DOF Translational Parallel Manipulators Based on Srew Theory
Authors: Huang Yong Gang , Du Li , Chen Ya Hua , Feng Jun
Published: August 2011

Based on screw theory,a systematic method is proposed to synthesis symmertrical non-overconstrained 3-DOF translational parallel manipulators(TPMs).Firstly,the configuration conditions of non-overconstrained TPMs are analysis.The generation of symmertrical non-overconstrained TPMs is reduced to design the structure of serial chains with one infinite pitch wrench,and to combine the same serial chains inparallel.Finally,making sure that, the union of the wrench for the same serial chains in each combination constitutes a three infinite pitch wrench system.we get all the 3-legged symmertrical non-overconstrained TPMs.
Preparation and Biocompatibility of Nanoscaled La/Ag/HAP Powder
Authors: Yang Hui , Yang Gai , Wang Chuang , Xu Ke Wei
Published: August 2011

The lanthanum-silver doped hydroxyapatite (La/Ag/HAP) powder was prepared by a coprecipitation way. Its microstructure, phase composition and thermostability were investigated by means of X-Ray diffraction, scanning electron microscopy, and Fourier Transform Infrared. The antibacterial properties against E.coli and S.Aureus were detected using a minimum inhibitory concentration method. The biocompatibility was confirmed by cell culture of osteoblasts of rat cranium. Results show that the investigated La/Ag/HAP powder exhibited the features of typical HAP phase in the experimental temperature, and its shape was needle-like with a diameter of 50~80 nm and a length of 300~500 nm. It is of a good biocompatibility and is more stable at high temperature, and is also a stronger antibacterial agent than pure HAP powders.
The Design and Realization of Digital Controlled Frequency-Variable Speed-Adjustable System Based on DSP and SVPWM
Authors: She Yan , Qu Cai Ping
Published: August 2011

The paper introduces voltage space vector pulse wide modulation (SVPWM) arithmetic and the field oriented control (FOC), develops a suit of Digital Controlled frequency-variable speed-adjustable system based on digital signal processor (DSP) TMS320LF2407 of TI company For motor control, and research and analyze design parts of the system, presents the instantiation application result. The experimental results indicate: the laboratorial setting has a simpler hardware construction, less output current harmonics distortion, higher control precision and stronger real-time sigal processing.
Study on the Stress Intensity Factor of Double Cracks Parallel to and Lying on the Interface in the Cladding Material Structure
Authors: Yang Jun Ru , Chen Gong Ling , Zhang Li Li
Published: August 2011

Taking the cladding material structure with double interface cracks parallel to and lying on the interface as the study object, based on the theoretical study on the crack tip stress intensity factor(SIF), using the finite element software ANSYS, the SIFs are researched by changing the crack space, crack length, thickness ratio, load and crack location. The results show that, the crack SIFs increase firstly and then decrease with the crack space increase, increase with the increases of the crack length and the load, decrease a little with the thickness ratio increase, decrease firstly and then increase with the increase of distance between the crack and the boundary.
The Application of PLC in Hydraulic Metal Band-Sawing Machine Improves Control Circuit
Authors: Xie Yu Jian
Published: August 2011

In order to solve the problem which causes high failure rate and low production efficient in the relay-contactor control system of hydraulic metal band-sawing machine, according to the technological requirement in the sawing process, the article uses PLC as controller to control hydraulic equipment automatically. The results showed that: the control circuit not only satisfies the technological requirement, but also makes sawing more stable and high efficiency.
Computer-Aided Analysis and Measurement of an Interconnection System
Authors: Lee Wei Chen , Wu Hill
Published: August 2011

The electrical characteristics of an interconnection system, which include impedance, insertion loss, and return loss, can greatly affect its performance as the signal speed increases. The objective of this research was to understand the discrepancy between the computer-aided analysis and measurement results of an interconnection system, so that a more accurate prediction of the electrical characteristics of this system can be made during the design phase. It was discovered that in both the time and frequency domain the computer-aided analysis results were consistent with the measurement results. Given these conclusions the simulation model was modified to improve the impedance mismatch within the interconnection system. It was found that by properly designing the antipad, the impedance mismatch can be greatly reduced.
The Research of Virtual Prototype Technology of Axial Piston Pump with Load-Sensing Control
Authors: Chen Yuan Dong , Chen Shu Mei
Published: August 2011

This article study something about establishing virtual prototype of axial piston pump based on the type of Vikers PVH98. Use ADAMS software to establish mechanism model and AMESim software to build hydraulic control system model respectively. Simulate the dynamic characteristics of the pump via coupling two models above-mentioned. Because of its clear in physical concept and easy change for parameters, the simulation based on virtual prototype is more convenient for studying the characteristics of piston pump.
Finite Element Microcosmic Contact Analysis of True Rough Surfaces Based on ANSYS
Authors: Wang Wei , Xiao Qiang Ming , Li Pei Lin , Zhang Hui
Published: August 2011

According to the significance of the contact between mechanical surfaces and the deficiency of the study at present, the finite element analysis software—ANSYS and APDL tool are used to set up a microcosmic contact model due to the micron scale surface topography data of the parts measured by the laser measurement equipment named OLYMPUS, and simulate the complete contact process of rough surfaces based on the theory of elastic-plastic transmutation. A solving algorithm of gird meshing based on multi load steps for the problems of grid precision and grid distortion is presented during microcosmic contact process. Through the disposal module /POST1, the relations between the real contact area, the load and stress are given, which offers the foundation for the analysis of contact mechanism and connect capability between mechanical joint surfaces.
Numerical Modeling of the Effects of Wears on Cutting Loads
Authors: Wang Xiao Yu , Cai Zong Xi , Su Peng Cheng , Zhao Hai Feng , Kang Yi Lan
Published: August 2011

In order to determine the normal force acting on the TBM disc cutter, a 3-D FEM model is established to simulate the cutting process, with the failure effect of the rock. Afterwards, by using this model, a series of numerical simulations are performed. Based on the numerical simulation results, via modifying Evans formula, an improved formula is given. The modified formula indicates the relationship between the normal force acting on a single disc cutter and the penetration depth, and contains the influence of formation stress and wear.
GPU Based Boundary Element Analysis for 3D Elastostatics with GMRES-DC Algorithm Solving System Equations
Authors: Wang Gang , Wang Qi Fu , Wang Ying Jun
Published: August 2011

During the modern product design, CAD softwares are widely used for geometric modeling and finite element method is used for structural performance analysis. Plenty of designers’ working time is spending in the pre-processing work of finite element analysis. Boundary Element Method(BEM) has been studied in recent years to analyze 3D elastostatics instead of Finite Element Method(FEM) because of the decrease of unknowns and easier mesh generation process. But the calculation amount of BEM is large, especially for the coefficient integrals and system equations solution. In this paper, we present a Boundary Element parallel computation technique for 3D elastostatics using Computing Unified Device Architecture (CUDA) that runs on GPU. Furthermore, we propose GMRES-DC (GMRES with Dual Compensation) algorithm based on the classic GMRES algorithm to gain a higher solving efficiency. The examples show that the GPU parallel implementation in this paper can accelerate BEM computation greatly, and the GMRES-DC algorithm can solve the BEM system equations efficiently.
Design and Analysis of the Table Tennis Wheelchair Based on the Human Engineering
Authors: Lei Lei , Guan Tian Min , Tao Ying
Published: August 2011

In order to improve the human engineering characteristics of the table tennis wheelchair and promote sport wheelchair, the design of a Table Tennis wheelchair was improved based on the human engineering. With the PRO/E software the table tennis wheelchair three-dimensional model is built and with the CATIA software the three-dimensional human body model is established. At last, in order to validate the human engineering performance of the improved table tennis wheelchair, we carried on the wheelchair man-machine engineering simulation, the operating space analysis of containing, balance analysis and body posture comfort level analysis and appraisal. The results indicated that the improved table tennis wheelchair can satisfy the human engineering request of the security, the efficiency and the comfort.