bluuebunny/crossref_metadata_2025 huggingface dataset:
Preparation of Acicular Basic Magnesium Carbonate by the Activation Product of Chrysotile Asbestos Tailing
Authors: Jiang Yan Peng , Peng Tong Jiang , Sun Hong Juan
Published: December 2010

Chrysotile asbestos tailing was broken down into active magnesium oxide and silicon dioxide by roasting. The activation product of Chrysotile as raw materials was used to prepare acicular basic magnesium carbonate by the carbon–ammonia method. The effect of the carbonization temperature, aging temperature, aging time, and the mole ratio of NH3•H2O and Mg2+ were studied on the form and percent conversion of the acicular basic magnesium carbonate. The structure, thermal properties and crystal morphology of the sample were analyzed by XRD analysis, thermal analysis and optical microscope, respectively. The results show that acicular basic magnesium carbonate prepared at the best conditions: carbonization temperature is at 50°C, aging temperature is at 70°C, aging time is for 4-5 hours, and the molar ratio of NH3•H2O and Mg2+ is 2:1. In this condition, the formation rate of specula basic magnesium carbonate is more than 82%. Its chemical formula which is 4MgCO3•Mg(OH)2•4H2O is obtained by XRD and thermal analysis, and the aspect ratio of the sample of the acicular basic magnesium carbonate was about 30 which was tested by optical microscope.
Preparation Sericite Nanoflakes by Exfoliation of Wet Ultrafine Grinding
Authors: Ding Hao , Xu Xia , Liang Ning , Wang Yue Bo
Published: December 2010

Sericite nanoflakes were prepared by exfoliating sericite layers by wet ultrafine grinding. Their appearance morphologies and main properties were characterized. Optimum conditions were studied with the purpose of forming shear stress which was beneficial to the exfoliation of mineral flakes. The results indicated that sericite nanoflakes could be prepared. Mass ratio of grinding media to materials, diameter ratio of grinding balls, solid content of powders and grinding time had significant effects on the preparation. The thicknesses of sericite nanoflakes were 20-80 nm, and the transmittances of ultraviolet ray with wavelength of 190-220 nm were only 0.1%-1%. This demonstrated that sericite nanoflakes had the function of shielding ultraviolet ray.
Remediation of Groundwater Contaminated by BTEX Using a Biological Barrier
Authors: Liu Xiu Li , Zhao Lin , Liu She Jiang , Cui Cheng Yang
Published: December 2010

In this study, a biological permeable reactive barrier system was designed to evaluate the remediation effectiveness of BTEX-contaminated groundwater. The biological barrier using immobilized bio-beads encapsulated with calcium alginate and activated carbon fiber as microbial carrier is able to biodegrade BTEX entering the barrier system. A laboratory-scale experiment using one continuous up-flow stainless steel column was then performed to evaluate the feasibility of this designed system. The second column was filled with bio-beads immobilizing BTEX-degrading microbial consortium. Simulated BTEX-contaminated groundwater, in which dissolved oxygen (DO) content was saturated, was pumped into this system at a flow rate of 0.07ml/min. Samples from the column were analyzed for BTEX and effluent DO. Results showed that BTEX could be well removed in this biological barrier.
Research and Application of Micro-Environmental Control Technology in Animal Breeding Industry
Authors: Liang Jin Sheng , Zhang Dong Mei , Ding Yan , Meng Jun Ping
Published: December 2010

Influence of micro-environmental factors in animal breeding room on healthy growth of animal was discussed, such as harmful chemical gas, drinking water, microorganism, temperature, humidity and noise. Main products and technologies used in improving animal breeding micro-environment were summarized from four aspects including deodorization, activating drinking water, adding feed additives, using temperature and humidity control devices. At last, the development trends of micro-environment control were proposed in large-scale animal breeding.
Room Temperature PL Characterization of Polycrystalline Diamond Prepared by HPHT
Authors: Li Zhi Hong , Gao Kai , Li Xue Song , Zhu Yu Mei , Wang Peng Fei
Published: December 2010

Diamond polycrystalline composites with some different elements were prepared by HPHT (high pressure and high temperature). The dependence between emission energy and excitation energy was characterized by PL technique. The results showed that the photoluminescence of diamond polycrystalline composites was not affected by additives, only related to the excitation. The emission wavelengths of composites decreased with excitation, at the same time, emission peaks shifted to high energy region and the peak width at half-height decreased relatively. The energy of emission had a linear relationship with that of excitation. The emission band peak location shifted from 1.57 (790nm) to 1.97eV (628nm) as the excitation wavelength changed from 2.34 (530nm) to 2.95eV (420nm). Emission intensity decreased linearly with the decrease of excitation energy intensity. However, this linear dependence disappeared as excitation wavelength was below 400nm.
Structure and Properties of Electrodeposited FePt Films
Authors: Li Cui Xia , Li Zhi Hong , Du Xue Yan , Shi Shi Yi
Published: December 2010

Fe-Pt binary alloy thin films were fabricated through a pluse electrodeposition in a novel bath with a simple composition on copper substrates. Composition, morphology and structure of electrodeposited Fe-Pt films were investigated in dependence on deposition potential. In a broad potential range from 2.0 to 6.0V, oxygen was detected in the films. Continuous Fe-Pt alloy films with controllable compositions in 16-58 atom% Fe were achieved on copper substrates. In particular, the films with a composition close to 1:1 Fe/Pt was obtained at -4.7V. All Fe-Pt films as-synthesized exhibited essential characteristics of soft magnetic and isotropic behavior, as investigated by a vibrating sample magnetometer (VSM).
Activation of Natural Zeolite and its Adsorption Property
Authors: Ding Hao , Wang Yue Bo , Liang Ning , Wang Bai Kun
Published: December 2010

Activation methods to improve the adsorption property of natural zeolite by inorganic acid and heat treatments at high temperature were investigated and its function of adsorbing harmful gases was evaluated. The results show that both methods can improve the adsorption property. Natural zeolite which was heat treated for 24 h has an adsorption ratio of 14.67% to H2O in air, which indicates the remarkable improvement of adsorption property. Meanwhile, the adsorption ratios to simulated refrigerator smelling gas such as NH3and H2S after 10 min are 99.00% and 95.20%, respectively.
Theoretical Calculation for Far Infrared Emissivity of Tourmaline Powder Materials
Authors: Wang Pei Peng , Liang Jin Sheng , Meng Jun Ping , Ding Yan , Han Yi Lin
Published: December 2010

The chemical composition of tourmaline crystal structure was investigated by using Diamond software and the relationship between the far infrared emissivity and the parameters of composition, structure and particle size of tourmaline materials was analyzed, and then four effective factors on the infrared emissivity were determined. By analyzing the effect of the variables on the emissivity, an effective function of the single variable on the emissivity was set up. Considering the weight coefficient of each factor, a calculation model on the far infrared emissivity of tourmaline was built up. Using this theoretical model, the method to improve the far infrared emission was discussed.
TiO2/Kaolinite Photocatalytic Material of Fe3+ Chemical Doping and Fe2O3 Heat-Banding and its Mechanism Analysis
Authors: Bai Chun Hua , Zheng Shui Lin , Sun Zhi Ming , Lei Shao Min , Gui Jing Ya , Lv Fang Li , Wen Ming
Published: December 2010

It is very prospective to prepare low-cost TiO2/nonmetallic minerals photocatalytic material, which utilizes sun as light source to treatment environmental problems. TiO2/kaolinite nanocomposite was prepared by sol-gel method, using layered kaolinite as substrate and Ti(OC4H9)4 as precursor. The optimum process conditions were achieved. In addition, photocatalytic material was modified by mean of Fe3+chemical doping and Fe2O3 heat-banding to enhance photocatalytic activity. AZO-dye wastewater containing Direct Blue and Direct Purple was treated by these two kinds of photocatalyst under UV-light and sunlight separately. The results showed that both methods improved material photocatalytic activity in some way and the photocatalytic efficiency was raised significantly in sunlight as well as in UV-light. The photocatalytic effect of Fe2O3 heat-banding was superior to Fe3+chemical doping. The characterization of SEM, TEM, AFM shown that the 1-10nm anatase TiO2 crystal grain was doped on surface of the kaolinite particles which is as like as ‘forest on the ground’. To further analyze the mechanism of the material, XPS was adopted to analyses the chemical composition, elements, valence state.
XRD Study of Hydrophlogopite Intercalated with Alkyl Quaternary Ammonium Salt
Authors: Sun Hong Juan , Peng Tong Jiang , Liu Hai Feng , Sun Jin Mei
Published: December 2010

Hydrophlogopite was modified with sodium and then organically intercalated with a series of alkyl quaternary ammonium salts. The organically intercalated samples were characterized by X-ray diffraction analysis (XRD) and the effect of alkyl quaternary ammonium salt on the interlayer spacing of hydrophlogopite was discussed. The results showed that if the same alkyl quaternary ammonium salt was used to intercalate hydrophlogopite, the interlayer spacing of hydrophlogopite increased gradually with the rise of the added amount of quaternary ammonium salt, and that if different quaternary ammonium salts with the same amount were used, the interlayer spacing increased gradually with the rise of the chain length of the alkyl quaternary ammonium salts. For the alkyl quaternary ammonium salts with large chain length (n>10), the inflection point for the increasing interlayer spacing of the intercalated hydrophlogopite is at about 0.5 times of CEC. When octadecyl trimethyl ammonium bromide is used as intercalation agent and the added amount is 5 times of CEC, the interlayer spacing of hydrophlogopite is relatively maximal.
Evaluation of Thermal Insulation Properties of Fibrous Mineral Fine Powders
Authors: Wang Fei , Liang Jin Sheng , Ren Chong Yan , Tang Qing Guo
Published: December 2010

The equivalent thermal resistance model of sepiolite mineral nanofibers has been presented in this paper to predict the thermal insulation properties of ﬁbrous mineral fine powders. The model was based on the correlation between thermal conduction and gas & solid conduction in the ﬁbrous system. According to the analysis about the process of heat transfer in sepiolite nanofibers, the total thermal conduction can be described as the synergism of the solid thermal conduction and the gaseous thermal conduction. From the equivalent thermal resistance model of fibrous materials in the accumulative condition, it can be seen that the thermal conduction of ﬁbrous mineral fine powders can be evaluated by the relationship between bulk density and thermal conduction of sepiolite nanofibers. Comparing the theoretical values with experimental data obtained from thermal conduction instrument, it was found that the theoretical values corresponded well with experimental data.
Humidity Sensing Characteristics of Montmorillonite Ion Conductors
Authors: Liu Hai Feng , Peng Tong Jiang , Sun Hong Juan , Xie Qiang Wei
Published: December 2010

. In order to exploit a kind of low cost and environment-friendly humidity sensing materials, a series of Li-modified montmorillonite ion conductors were prepared using the montmorillonite form Jimusaer in Xinjiang Province of China. The montmorillonite humidity sensing elements were made by the thick film technique on mica substrates. Then the structures of the samples were investigated by X-ray diffraction (XRD) and the humidity sensing characteristics of the elements were tested by an equipment of the resistance testing. The results indicate that the resistances of the montmorillonite humidity elements all decrease with the increase of the system humidity. But there is a great discrepancy between the resistances of Na- montmorillonite humidity element when humidity adsorption and desorption. It was found that Li-modification montmorillonite ion conductors behave well as a humidity sensing material in 30～90% RH (relative humidity). The suitable experimental parameters of montmorillonite Li-modifying under ~ 80°Care obtained.
Standardization of Antibacterial Bone China
Authors: Wang Li Juan , Liang Jin Sheng
Published: December 2010

The developments of antibacterial ceramics technology were introduced. A new type of antibacterial agent used in bone china, multifuntional healthy ceramic materials antibacterial mechanism, was discussed. With the quick development of antibacterial bone china technology and market, it was necessary to estabish the antibacterial bone china standard.
Advances in Microscale Polymer Chemistry
Authors: Li Qing Shan , Hong Wei , Xu Ming Shuang , Zhang Shu Yuan
Published: December 2010

Micro-polymer chemistry experiment teaching had such characteristics as using less reagents, less pollution and more portable in comparison with the conventional experiment, with the significant progress, more than thirty years ago. In China, Zhou Ninghuai and others firstly began to go on micro-scale experiment research and Professor Li Qingshan who brought this innovation to polymer organic synthesis experiment has done a lot of works in micro-polymer chemistry experiment teaching. To carry out the study of micro-polymer chemistry experiments not only accords with teaching methods and reform, but also conforms to the trend of the times of green chemistry. The research and application of micro-polymer chemistry experiment have broad prospects. The microscale chemistry experiment (ML) is developed from the idea of green chemistry and the prevention of chemical industry. Microscale chemistry presents a low-cost and green approach in the teaching of chemistry laboratory courses, so it’s the reform of traditional chemical methods. In micro-chemistry experiment, most of the raw materials are in the amount of quality 1g or volume of 1mL below, in line with famous micro-chemist Professor Ma Zusheng[1] (Prof • T. S. Ma), who put forward that "It is to use the chemical reagents as low as possible to obtain the necessary technology information in microscale chemical experiments". In contrast to conventional macroscale chemistry experiment, the micro-chemistry experiment can not only reduce the running cost of laboratory teaching, but also alleviate the potential hazard sassociated with chemistry experiments.
Analysis of Influencing Factors on Mechanical Properties and Anisotropy of Attapulgite/NR Composites
Authors: Lu Xiao Long , Tang Qing Guo , Liang Jin Sheng , Ding Yan , Guo Hao
Published: December 2010

Based on the dispersion characters of organic modified attapulgite (OAT) short fibers in nature rubber (NR) matrix, this paper analyzed the effects, in terms of addition amount of OAT, processing technology of rubber compound and heat treatment, on mechanical properties and anisotropy of OAT/NR composites. Results indicated that mechanical properties were better when the OAT content is 50 phr and thin-passing is 20 times, meanwhile, the longitudinal and transversal tensile strength of OAT/NR composites were 17.01 0.5 Mpa and 14.18 0.5 Mpa respectively. The anisotropy is obvious. Also the tensile and tear broken section were studied by the scanning electron microscope (SEM) and the forming mechanism of OAT/NR anisotropy composites was discussed.
Biodegradation of Swainsonine by Stenotrophomonas maltophilia Strain YLZZ-2 and its Isolation and Identification
Authors: Zhao Xing Hua , He Xin , Wang Jian Hua
Published: December 2010

Eight swainsonine (SW)-degrading bacteria were isolated from the soil where locoweed was buried for 6 months and one of the strains (YLZZ-2) was selected for further study. Based on morphology, physiologic tests, 16S rDNA sequence, and phylogenetic characteristics, the strain showed the greatest similarity to members of the order Stenotrophomonap and the closest to members of the Stenotrophomonas maltophilia group. The ability of the strain to degrade SW, as sole carbon source, was investigated under different culture conditions. The preferential temperature and initial pH value for the strain were 25～35 °C and 6.0～9.0, respectively. The optimal temperature for the strain was 30 °C and the optimal pH value was 7.0. There was positive correlation between degradation rate and inoculation amount. The growth of stain YLZZ-2 and degradation rate were fast, and YLZZ-2 could completely degradate 400 mg/L swainsoine within 24 h. There was a linear relationship between the growth of stain YLZZ-2 and degradation of swainsonine. These results highlight the potential of this bacterium to be used in detoxifying of SW in livestock consuming locoweed.
Catalytic Performance of SO2 by Colloidal Gold Supported on Nano γ-Fe2O3
Authors: Xu Sheng Rui , Shuai Qin , Cheng Jin Hua , Wang Xiao Ge
Published: December 2010

A new catalyst of gold supported on nanometal oxide for oxidation of SO2 was developed. Deposition-precipitation method was used to prepare gold-based catalysts. The catalytic activity of the catalysts was evaluated by determining the concentration of SO2 with gas chromatography under reaction temperature from 100 to 700°C. The results showed that there was an enhancement of catalytic activity when gold nanoparticles were dispersed on the surface of nano-metal oxides, furthermore, γ-Fe2O3 showed the highest activity as the support of the colloidal gold supported catalysts among the nanometal oxides including γ-Fe2O3, Fe2O3, ZnO, and Al2O3. It was also found that water vapour in the reaction enhanced the catalytic activity of Au/γ-Fe2O3. The Au/γ-Fe2O3 was characterized by XRD and FTIR methods, which indicated that the gold nanoparticles were dispersed on the γ-Fe2O3 support and sulfate species were formed on the surface of catalysts.
Effect of Activating Device on the Properties of Tap Water
Authors: Zhang Dong Mei , Liang Jin Sheng , Ding Yan , Li Can
Published: December 2010

Effect of activating device on the property of tap water was studied by surface tensiometer and pH meter. The results showed that the surface tension of tap water activated by the device reduced and pH value increased. The variations of surface tension and pH value are connected with flow rates. The larger flow rate, the less variation of surface tension and pH value when at the same cycle time, however, the more variation of surface tension and pH value when at the same activating time. Activated by the device, 17O NMR half width of tap water reduced from 70.79Hz at the inlet to 60.87Hz at the outlet. Reduction of surface tension were caused by hydrogen bonds in water clusters which were weakened or broken by far-infrared radiation of functional ceramic ball and galvanic cell action of copper-zinc alloy. Increment of pH value were caused by H+ in water exchanging with metal cations on surface of far-infrared ceramic balls and dissolved oxygen getting electron and forming OH-1 with the function of copper-zinc alloy.
Role of Silicon in PM Processed Soft Magnetic Alloy
Authors: Sharma Deepika , Chandra Kamlesh , Misra Prabhu Shankar
Published: December 2010

Iron-Phosphorus based soft magnetic materials are known for their hot and cold shortness. The present investigation deals with the development of high-density Fe-P based alloys in the form of very thin sheets (0.1mm) by proper soaking of them at a high temperature so as to eliminate Iron-Phosphide eutectic and bring the phosphorus entirely into solution in the iron. It has also been possible to eliminate the use of a hydrogen atmosphere during sintering by using carbon to form CO gas within the compact by reaction with the oxygen of the iron powder particles. A glassy ceramic coating applied over the compact serves as a protective coating in order to avoid atmospheric oxygen attack over the compact held at high temperature. The Fe-0.3wt% P- 0.4wt% Si alloy so formed yielded coercivities as low as 0.42 Oe, resistivities as high as 28.4 µΩcm and total losses as low as 0.132 W/Kg. Such a combination of properties may make the alloy suitable for application in magnetic relays and transformer cores.
Voltage Switch of Nano-Size Zinc Oxide Ceramic Defected Barium
Authors: El-Hofy M. , Salama A.H.
Published: December 2010

Two samples of ZnO doped Ba with the chemical composition, 97ZnO-3BaO, have been prepared via oxalate co-precipitation. During precipitation the first sample, A, was stirred by magnetic stirrer while the second sample, B, was stirred via 40KHz ultrasonic wave. The obtained powders were decomposed at 400°C for 3h, then pressed and sintered at 1200°C for 1.5h. Then XRD, SEM and J-E measurements were performed and analysed. The grain sizes of the obtained ceramics were (0.5-2.26) µm and (80-119) nm for samples A and B, respectively. The J-E measurements revealed that the obtained ceramic has voltage switching characteristics, and that the switching voltage could be controlled by the stirring process.
A Brief Survey of the Literature on Silica Refractory Research and Development: The Case for Nanostructured Silica Obtained from Rice Husk Ash (RHA)
Authors: Ugheoke B.I. , Mamat Othman , Ariwahjoedi B.
Published: December 2010

Silica refractory research and development has taken a down-turn; perhaps due to the problems associated with it, or because of concerns regarding earth conservation, earth being a major source of the raw material - quartz - which is used for silica refractory manufacture. In this review, the authors have pin-pointed the problems associated with silica refractory use from the researches of the early era (1913 to 1990) and have assessed the themes of current research, in order to ascertain how well these current researches have attended to the problems raised in the early research era. The review shows that the gaps identified in the early research era still remain unattended to. It concludes by making a case for nanostructured silica obtained from rice husk ash (RHA), for the production of silica refractory, as a way of solving these problems and making silica refractory production a booming industry once again.
GaAs Surface Composition Investigation during Al Thin Film Growth Using the CBE Method
Authors: Lioubtchenko Dmitri V. , Briantseva Tatiana A. , Lebedeva Z.M. , Bullough Tim J.
Published: December 2010

GaAs surface composition changes occurring during Al film growth using the CBE method with laser assistance were investigated in situ by means of laser reflectivity. The results were compared with data on precise chemical analyses and X-ray microanalyses carried out after film deposition. It was found that the peculiarity of film formation depended upon the laser power. Physicochemical interactions of the Ga atoms from the GaAs surface, with atoms and molecules from the surrounding media, are determinative reactions at a laser power of 2W. At a power of 0.02W, the laser reflectivity changes were mainly due to reactions with Al. The appearance of “free” Ga and As in the region outside of the laser spot indicated the destruction of GaAs islands weakly connected with the GaAs surface.
A Spool Displacement Control System of Proportional Valve Based on Digital Observer
Authors: Kong Xiang Bing , Wang H.Y.
Published: December 2010

To solve the problems that general proportional valve can’t meet the requirements of high precision control, the paper describes the generation mechanism of kinetic energy in the accurate spool displacement control system of the small flow rate proportional valve. The mechanism of kinetic energy and displacement control of spool under disturbance are discussed quantitatively. Based on DSP and the mathematical model established, the digital state observer feedback control system is designed. The experiment shows that the system can restrain disturbance effectively, and the control accuracy of spool displacement is high, which is up to the level of 5μm.
A Intelligent Wheelchair Obstacle Avoidance System Based on Multi-Sensor Fusion Technology
Authors: Zhang Yi , Chen J.
Published: December 2010

In this paper an intelligent wheelchair obstacle avoidance system based on multi-sensor data fusion technology is instructed. It giving rises to the hardware architecture of the wheelchair and develops a sonar and camera data acquisition system on the VC++ platform by which we could complete the sonar and camera sensor information collection and data processing. Use a T-S model based fuzzy neural network multi-sensor data fusion method for intelligent wheelchair obstacle avoidance. Some simulations were done to test the method in different environments and the method can effectively integrated the information of sonar and camera, give appropriate control signals to avoid obstacles.
Prediction of Critical Cutting Conditions of Adiabatic Shear in Orthogonal High Speed Cutting Based on Linear Pertubation Analysis
Authors: Li Guo He , Wang Min Jie , Cai Yu Jun
Published: December 2010

A model is presented for the prediction of critical cutting conditions of adiabatic shear in orthogonal high speed cutting. Considering the influence of compression stress, a critical criterion of adiabatic shear in orthogonal high speed cutting is given by linear perturbation on the compress-shear deformation continuum mechanics basic equations of the primary shear zone. Combining with the relationship of cutting conditions and deformation ones, also the materials constitutive realtionship, a pridiction model, which expressed by cutting conditions and materials properties is established. As an example, the adiabatic shear critical conditions of AISI 1045 steel are predicted, and cutting experiments are performed. The prediction results are consistent with that of experiments.
Sequential Fluid-Structure Interaction of a Large-Scale Gas Control Valve
Authors: Cao Fang , Wang Yong , An Y.T.
Published: December 2010

According to the real structure and work condition of a large-scale gas control valve used in recycling generating electricity project, a sequential fluid-structure interaction system model of control valve is set up, the coupling of fluid and valve plug is studied. The complicated fluid pressure, stress and deformation of balanced valve plug and stem at different control valve openings are investigated. The root cause of plug vibration by fluid is revealed. The natural frequency and modes of vibration are obtained, which could verify whether the design overcomes resonance. All of these are in favor of realizing design optimization in fluid-structure interaction and are of great practical significance for advancing study on large-scale control valves.
Analysis of Lead Screw High-Speed Roll-Beating Forming
Authors: Li Yan , Zhang L. , Yang Ming Shun , Yuan Qi Long
Published: December 2010

Lead screw high-speed cold roll-beating is a new single-point incremental forming technology which is die-free and unconstrained. The principle of the forming process is analyzed. Modeling, meshing and parameter selecting for forming process simulation with ABAQUS are discussed. The lead screw cold roll-beating forming process simulation is carried out; stress & strain changes and metal flowing law are analyzed. Experiments are carried out with the self-developed experimental equipment. The experimental results are consistent with the simulation results, thus the validity of the simulation and feasibility of the forming process are verified.
Research on the Fracture Phenomenon of Zirconia-Toughened Alumina Ceramics under Ultrasonic Vibration
Authors: Yan Yan Yan , Zhao Bo , Liu Jun Li
Published: December 2010

A study of the fracture phenomenon of zirconia-toughened alumina (ZTA) ceramics was carried. It analyzes the mechanisms of crack propagation of ZTA ceramics, and constructs fracture experiments of ZTA ceramics, so the propagation behavior on fracture in ZTA ceramics was investigated according to the experiment. By contrast, intercrystalline fracture happed in V-shaped groove of ceramic specimen under normal load without ultrasonic vibration during ceramic fracture, and transcrystalline fracture happed in V-shaped groove of ceramic specimen under normal load with ultrasonic vibration during ceramic fracture. Furthermore, the loading force of ceramic specimen under normal load with ultrasonic vibration is smaller than that under normal load without ultrasonic vibration all other conditions being equal. The results of fracture experiment prove that ultrasonic vibration assisted is good for the fracture of ceramic specimen, and it also proves that ultrasonic vibration assisted grinding may raise the working efficiency and improve surface integrity of ceramics from the standpoint of the fracture.
Preliminary Research on the Post Treatment of Fluid Magnetic Abrasivetool
Authors: Li W.D. , Lv Ming , Yang Sheng Qiang
Published: December 2010

Fluid magnetic abrasivetool(FMA) is one kind of latest finishing abrasivetool which is a sort of suspended fluid composed by magnetic particles, nonmagnetic abrasive particles, surfactants in a non-magnetizable carrier liquid. After a period of working time, the performance-life of the abrasivetool ended because of the cutting- blade of the abrasives particles being passive. While the most costly component- the magnetic particles (carbonyl iron particles) can be reused. This paper has made up two recovery flows to separated carbonyl iron particles from others.
Research on Intelligent Tracking Control Technology for a Photoconductive AGV
Authors: Pu L.L. , Zhang Xiao Dong
Published: December 2010

In order to improve the stability and reliability of the logistics handling robots, some optical fiber sensors were used to achieve the automatic navigation and tracking of AGV (Automatic Guided Vehicle) in this paper, and its key technology were also investigated. On the basis of adopting colored ribbon as tracking path, the layout of optical fiber sensors array is designed, and then a control algorithm based on MCU was presented for AGV. Finally, the practicality and effectiveness of intelligent tracing control technology were discussed, respectively.
Design of a Rudder Actuator Electric Loading Test System
Authors: Pan Xu Dong , Wang Guang Lin , Zhang J. , Sun L. , Liu H.J.
Published: December 2010

Rudder actuator loading test system is the torque load simulation device of flight vehicles. An electric loading scheme of a PWM drive torque motor is proposed in this paper. Then the box-shaped structure of the loading system is designed, the performance of the loading system is improved for the high machining and assembly shaft system precision by adopting this structure.
Experimental Study on Dry WEDM Finishing
Authors: Wang Tong , Qiu Feng , Wang C.Q. , Zhang G.Z. , Xu Xiao Cun
Published: December 2010

Comparing with conventional WEDM in emulsion, dry finishing of high-speed WEDM (HS-WEDM) has advantages such as higher material removal rate, better surface roughness and straightness. Authors have presented a new procedure as gas-liquid combined multiple cut, in which roughing is processed in dielectric liquid, and semi-finishing is in liquid or gas, while finishing is in gas. For better understanding the effect of machining parameters on surface roughness and cutting speed in dry finishing, a L25(56) Design was implemented. The analysis of variance shows that the effect of pulse duration on surface roughness is of high significance, and peak current is of significance respectively, and the effect of no load worktable feed on cutting speed is high significant.
Research on the Character of a Synchronous Control System with Wireless Data Communication
Authors: Liu Jun Li , Yan Yan Yan , He G.Q.
Published: December 2010

It discusses the reasons of the data transmission time delay and packets loss based on the theory of net data transmission. Aimed to the question of the time delay of data transmission and packets loss, the control system models are set up to analyze their influence to the performance of the control system. Based on the synchronous control model analysis with wireless data transmission, a method to control the system is reached with the state prediction when the communication error or data loss appears. It can control constantly when communication errors appear, and also it can get the most error period by numerical analysis.
Research on the Finishing Mechanism of Fluid Magnetic Abrasives
Authors: Zhang H. , Li W.D.
Published: December 2010

The fluid magnetic abrasive (FMA) is a new type of precision finishing abrasives. The workpiece can be finished by fluid magnetic abrasive (FMA) because of its rheological property. On base of researching on the micro-structure of fluid magnetic abrasive (FMA), this paper analyzed the finishing mechanism. And the experiments and results are presented as well in this paper.
Analysis of Modality of CK61125 CNC Lathe Spindle Box
Authors: Yang Jian Xi , Yang M. , Cui F.K. , Xu Hong Yu
Published: December 2010

CNC lathe spindle box is a key component of the CNC lathe system, and its dynamic characteristics are the main factor affecting the machining accuracy and processing efficiency of machine tools. In this paper, CK61125 CNC lathe spindle box model was established by simplifying its structure. Then modal analysis of the spindle box was done and extended to 6-order modes with the platform of co-simulation environment in ANSYS Workbench, and the natural frequencies and vibration modes for lathe spindle box were obtained. The weak links in the spindle box were found, and the improvement schemes are proposed. Finally the lathe spindle box was improved, the modal analysis of the spindle box was made again, and the results showed that the lathe spindle box dynamic performance was improved. All of these results are beneficial for optimization and re-design of the lathe spindle box so that it has better dynamic performance.
Intelligent Fault Diagnosis of the Control Valve with High Flow Rate
Authors: Zhang Yue Rong , Wang Yong
Published: December 2010

Control valves are the crucial assembly, which controls the flow of medium in fluid machines. Control valves play an important role in electricity industry, nuclear industry, and chemical engineering. The technology of fault diagnosis is applied to the fault detection and fault diagnosis of the control valve with high flow rate for the sake of economic development and safety. This paper presents results of a study on classification and mechanism of the common faults of control valves in connection with the structure of the valve applied to the circle-electricity industry. We analyzed the principles and characteristics of different diagnosis methods, discussed the mechanism of different faults of the valve. Furthermore, we investigated the diagnosis method that is suitable for different faults of the valve and the pivotal technique with which intelligent fault diagnosis (IFD) can be realized successfully. In addition, the route and the plan of the study on IFD of the control valve with high flow rate is suggested to develop a system of intelligent fault diagnosis and detection (IFDD) for the control valve.
Manufacturing Plant Management Information System Analysis and Design Based on UML
Authors: Yang X.Y. , Zheng H.B. , Zhang Z.W.
Published: December 2010

With the development of manufacturing automation and intelligent increasing speed, the construction in plant management information has been important tasks to promote business innovation ability, improve competitiveness and manufacturing execution. In this paper, UML (Unified Modeling Language) and object-oriented modeling technology were applied to model the static structure and dynamic behavior of the plant management information from requirement analysis to system implementation, including functional requirement model, static structural model, asset management time sequence chart, system physical model and so on. The visualized system analysis method and technology better planned the system design and improved the efficiency of the system development. It will play a guiding role in the object-oriented software development.
Cutting Mechanism Study on Technology in Near-Dry Deep-Hole Drilling
Authors: Hai Peng , Wei H.X.
Published: December 2010

Near-dry deep hole processing technology is a kind of technology which dry cutting technology is applied to deep hole processing to save energy and decrease environmental pollution. In this paper, the structure and work principle of near-dry deep-hole drilling system were introduced and the cutting mechanism of near-dry deep-hole drilling was analyzed which include the mechanism of cutting fluid atomization and flow, the mechanism of atomized cutting fluid cool and lubricate, and the mechanism of separating chips into short pieces and discharge chips by air stream, etc. The mathematical mode of gas-liquid two-phase flow of atomized cutting fluid in drilling shaft and the cooling and lubrication mechanism of the capillary in cutting zone were introduced. It is found that near-dry deep hole processing has better cooling and lubrication effect through experiments.
Research on Interpolation Control of 6-DOF Water Cutting Robot
Authors: Xie Ming Hong , Wang W.
Published: December 2010

In order to get the exact water cutting of the complexity shape, the 6-DOF robot kinematics model is put forward. The gesture of every point can be calculated in real-time through NC interpolation algorithm of the expected discrete points on the track. On the basis of the matrix of position and gesture, a precise control method of 6-DOF water cutting robot trajectory and attitude of the end is proposed which comes from the improved NC-based code and could get any angle cutting surface, which is easy to program off-line. Finally, the simulation verity of NC interpolation control is made by VC and MATLAB tools.
Microelectrode Fabrication by Electrochemical Turning
Authors: Wang Yu Kui , Li X. , Chen H. , Wang Zhen Long , Shan De Bin
Published: December 2010

In this paper micro-electrochemical turning for fabricating microelectrode is presented. A stainless steel film with 50 μm thickness as turning tool is the cathode and a rotary tungsten rod for the proposed microelectrode fabrication is the anode. By applying ultra short pulses in micro seconds, dissolution of the anode can be restricted to the small region very close to the cathode. Due to rotation of the anode and movement of the cathode along the rotary axis direction, the anode uniformity corrosion was improved and its rotating concentricity was ensured simultaneously. A micro-electrode with a high aspect ration, namely 20 μm in diameter and 2500 μm in length has been fabricated in the low concentration electrolyte, 4%NaOH.
Study on Acoustic System Designing of Two Dimensional Ultrasonic Polishing without Abrasives
Authors: Liu Chuan Shao , Zheng Jian Xin , Liu Y.F.
Published: December 2010

Acoustic system is the core component of power ultrasonic, which is designed by traditional analytic method and modal analysis with finite element analysis method. And component of the step-like horn with rectangular sections and tool head used in two dimension ultrasonic polishing without abrasives are studied, and the calculating results and modal analysis results are consistent on the whole. The harmonic response analysis for the component of horn and tool head is carried out and the three dimensional coordinates of the vibrating node on the tool head with maximal displacement are obtained. The fitting result shows that the moving trajectory of such node is ellipses, which meets the experimental requirement well. So a new way for designing acoustic system of two dimensional ultrasonic vibration through combining theoretical calculation with computer aided design may be applied.
Basic Research on Ultrasonic Extrusion for 45 Steel Shaft
Authors: Zheng Jian Xin , Liu Chuan Shao , Zhang Yue Min
Published: December 2010

Research on ultrasonic extrusion under different process parameters for 45 steel shaft based on orthogonal test is carried out. The influences of various process parameters on shaft surface roughness and micro hardness are analyzed. The experimental results show that the influences of tool radius, pre-pressure, feed rate and rotating speed in the ultrasonic extrusion on surface roughness and micro hardness are different, but there are optimal values in the given experimental conditions. Compared with conventional extrusion, it can reduce the part surface roughness and improve surface micro hardness significantly in the process of ultrasonic extrusion.
Research and Implementation of Automatic Camshaft Measurement Technology
Authors: Zhong Li Juan , Tong Jing Lin
Published: December 2010

In this article, the principle of automatic camshaft measurement technology and the control system's structure are introduced. The realized means and principle of the major control modules which is the servo control system and the follow-up control system are expounded. The data acquisition system independent of movement controller and "whole-sensitive" data processing method and evaluation method are expounded. And through experiment, the feasibility of this measurement technology has been proved.
Experimental Study on Vibration Characteristics of Acoustic System in Ultrasonic Vibration Lapping
Authors: Zhang Chang Juan , Liu Chuan Shao , Zhao Bo
Published: December 2010

In this paper, the natural frequency and the vibration mode of the lapping tool in ultrasonic vibration lapping are analyzed, the resonance mechanism of the lapping tool is researched by establishing its mechanical model and displacement equation, and the experimental study is carried out in ultrasonic vibration lapping of engineer ceramics. The conclusions include: 1) The natural frequency of the designed lapping tool is ; 2) The acoustic system in ultrasonic vibration lapping is simplified to equivalent many-degrees of freedom system, while the damp is ignored, the lapping tool is resonant with itself-natural frequency, the joint of the horn and the lapping tool is a displacement node, and the whole system is in resonant condition. 3）While the experimental condition is no-load and ultrasonic, the vibration frequency of the lapping tool is 21.3125 , which is further closed to the calculated natural frequency, at that time the amplitude of the lapping tool is maximal and the system is in resonant condition. Moreover, while the resonance frequency of the horn and the lapping tool is different, the good vibration effect of the lapping tool can be obtained by adjusting the excitation frequency of generator.
Numerical Simulation Analysis of Temperature Field for Motorized Spindle of High-Grade CNC Machine Tool Based on ANSYS
Authors: Li C.Q. , Zhang Xiao Dong , Zhang Q. , Li H.
Published: December 2010

To solve the problems that the thermal deformation of the High-Grade CNC machine tool has much effect on accuracy and quality of the produces, the structure characteristics of the high speed motorized spindle is firstly introduced in this paper. Then one type of motorized spindle and supporting structure are selected, and the thermal boundary parameters are calculated. Much more the static and transient temperature field are simulated by using FEA software ANSYS in one working condition. At last, the main measures to improve the uneven temperature field and the plans to reduce the thermal deformation are put forward, which are provided some technical bases for the equipment to achieve the high-speed and high-precision machining.
Two Stage Segmentation Method Based on Triangular Mesh Model
Authors: Duan Ming De , Zhang Zhuang Ya , Cheng J.T.
Published: December 2010

Reasonable segmentation for point cloud data is helpful to improve the efficiency and quality of surface reconstruction in reverse engineering. Aiming at the problems existing in the edge-based method and surface-based method, two stage segmentation method is proposed. Through the successful segmentation of the experiment block ，automobile steering knuckle and motorcycle covering parts.，the segmentation results prove the validity of the method and show that it can meet the requirement in engineering application.
3D Parametric Design for Steel Headframe of Coal Mine Based on Solidworks
Authors: Wei F. , Wang F.R.
Published: December 2010

The 3D model base of steel headframe, which is built with Solidworks and uses dimension-driven steel headframe parametric function of Solidworks, is to realize the parametric design of head frame under virtual network, to produce users-needed 3D general and sub-component model of headframe and to generate 2D engineering drawing automatically. With this the reiterated labor can be reduced, the development period of products be curtailed and the cost of design be cut down.
Application of Finite Element Analysis in Automotive Wheel Design
Authors: Liu Jian Ping , Ye Bang Yan , Li G.W.
Published: December 2010

To solve the problems of automotive wheel’ design by using traditional methods, application of finite element analysis in modern automotive wheel design is presented. Then, for example of SU0011-typed aluminum alloy wheel, this paper illustrates in detail the application in its hub structure design, mold design and casting process. By using the ANSYS software, structural design of wheel is optimized according to the CAE results of fatigue strength. In the meanwhile, the casting mold of wheel hub is also designed. Using the ProCAST software, casting process optimization and casting defects elimination can be realized based on simulating the process of filling and solidification of low-pressure casting. Experimental analysis shows that, with the help of finite element analysis, design accuracy and product reliability can be effectively improved and product development cycles can be greatly shorten. So the application has a very good prospect in the automotive industry.
Gray Clustering Evaluation Method of MIE on Combinative Weight-Fixing
Authors: Li Yan Feng , Mou H.H. , Lv K.
Published: December 2010

The research on evaluation method of manufacturing enteraprise informatization(MEI) is the core of informatization evaluation system. According to the characters of MEI, a gray clustering evaluation method on combinative weight-fixing is brought forward . In the way to fix the index weights, firstly the advantages and disadvantages of the subjective and objective weight-fixing method are analyzed compositively. Then the subjective weights are gained from Analytical Hierchy Process(AHP) method and the objective weights from Gray Relating Analyses(GRA) method. Last the final indexs’ weights are gained from the combinative weight-fixing method based on the minimum error of optimizing project, which takes in the full advantages of the two methodes. Finally the informatization construction process is devided into certain Gray Types, and the informatization benefits are calculated with Gray Clustering method based on Whiten Function. In the end Three enterprises are chosen to analyze with gray clustering evaluation method on combinative weight-fixing.
Detecting System Design of Tactile Sensor for the Elderly-Assistant & Walking-Assistant Robot
Authors: Zhang Xiao Dong , Wei X.J. , Zhang J.J.
Published: December 2010

In this paper, in order to help the growing number of elderly do away with the difficulty getting about, a walk-assistant robot for the elderly was designed with tactile and sliding senses that can perceive the movement intention and state of the elderly. And then, its key component, namely detection system of tactile and sliding sensor is designed in detail, including the layout of basic unit selection design of tactile and sliding sensor and the data acquisition system. In the end, a single channel experimental platform is built. The tactile and sliding senses of the elderly are detected and analyzed, and the design of detection system has been preliminarily verified effective. The results show the designed tactile and sliding senses detection system has the function to recognize the intention and state of the elderly movement.