bluuebunny/crossref_metadata_2025 huggingface dataset:
Study on Hot Deformation Behavior of Ti-6Al-4V-0.1B Alloy with Equiaxed Microstructure
Authors: Yu Yang , Hui Song Xiao , Ye Wen Jun , Xiong Bai Qing
Published: January 2012

Isothermal compression of Ti-6Al-4V-0.1B alloy was carried out at deformation temperature of 850-980 °C, strain rate of 0.01-1s-1, and maximum height reduction of 60% with Gleeb1500D simulator. The equation between flow stress and strain was gotten for plastic deformation. It shows that the peak flow stress and steady stress were sensitive to the strain rate and temperature except low strain rate and above 950 °C. The activation energy of deformation was obtained in isothermal compression of Ti-6Al-4V-0.1B alloy was 578.29KJ/mol in (α+β) region. The constitutive equation which describes the relationship between the flow stress as a function of strain rate, strain, and deformation temperature were established by adopting the Arrhenius equation:=3.22×1024sinh3.29527(0.0107σ) exp (-578290/ RT).
The Crystal Growth of Ti50Cu23Ni20Sn7 during the SPS Process
Authors: Li Qiang , Zhu Yu Ying , He Yun Hua , Wang Ge , Wang Xing Hua
Published: January 2012

Ti50Cu23Ni20Sn7 bulk amorphous alloy was prepared by mechanical alloying and spark plasma sintering. The milling was performed in a high-energy planetary ball mill. XRD showed that after milled 35h, fully amorphous powders can be obtained, under the condition of the milling speed, 300rpm, and the weighs ratio of ball to powder, 20:1. Thermal stability of the as-milled amorphous powder was determined by DSC at the heating rate of 40K/min. The glass transition Tg and the initial crystallization temperature Tx1 was 746K and 782K, respectively. Then, the obtained amorphous alloy powder was compacted by spark plasma sintering at the temperature of 753K, 763K, 773K, 783K and 793K under the compress of 500Mpa. Crystal structure and the morphology of the sintered samples were investigated by XRD and SEM, respectively. When sintered near the glass transition temperature, the SPS sintered samples remained complete amorphous, crystalline peak did not appear in the XRD curves. As the sintering temperature increased, the crystalline phases in the sample began to increase. It was shown that when sintered at 753K and 763K, the samples had fewer defects, and it was completely amorphous alloy. When the sintering temperature increased to 773K, more defects appeared, including point-like defects and disc-shaped defects. The disc-shaped defect was widespread in the specimens sintered at 783K and 793K.
Effect of Pistachio Twig Flour Content on the Water Uptake of Thermoplastic Polymer Composites
Authors: Saffarzadeh Mohaddeseh , Farahani Mohammad Reza Masteri
Published: January 2012

In this research, the water absorption of polypropylene-pistachio twig flour composite with different content pistachio twig flour were investigated. For this purpose, water absorption was determined according to modified D570 standard. The results indicated that the water absorption of composites increased with increasing of wood flour content.
Towards Optimal Flow Uniformity: Stiffener Layout Design Evaluation of Injection Moulded Plastic Part
Authors: Deng Yi Min , Sun Bao Shou , He Hua Bo , Shangguan Fu Zhan
Published: January 2012

Injection moulding is an important manufacturing method for plastic parts. There are however many moulding quality defects caused by inappropriate setting of moulding process conditions, as well as the poorly designed plastic part geometry. Often, stiffeners are used in a plastic part to increase its strength. However, if the stiffeners are not designed properly, they will introduce one or more moulding quality problems, which in turn will worsen the part strength rather than increasing it. Although there have been quite a lot of researches on optimising moulding quality, it is often difficult to minimize multiple quality defects simultaneously. In this paper, we propose to employ flow uniformity as the optimisation objective to address this problem. A number of stiffener layout designs are evaluated in terms of this objective to determine the best design, where standard deviations of filling times and pressures at the extremities of the plastic part are used to measure the uniformity of flow. A simple case study is also presented to demonstrate the applicability of the proposed methodology.
Diamond Like Structure Nano Carbonitrides Hardening of Hard Alloys Cutting Tools
Authors: Minaev Y.A.
Published: January 2012

The fundamental property of solid crystalline materialsi.e.phenomena of first-order phase transition of grain boundaries with formation of two-dimensional liquid have been used for elaboration of the new technology. Nitriding type methods have been used to develop strategies for effective forming of coatings by synthesis of nitrides and carbonitrides on surface layers of hard metals. WC-Co and WC-TiC-Co hard metal tools have been used for experiments. Industrial tests indicated that the tools functional properties improved 2-9 times. The new tools demonstrated a high resistance to surface wear and to fragile break–down. The formed layers, interface and binder behaviour have been investigated through the experiments with use of optic and electron microscope, X-ray phase analysis and micro-hardness device measures. The layer microstructure investigation demonstrates: the hardening of thin surface layer (0.1-0.3 mm) by nanosize carbonitrides with diamond like structure and strengthening of the following layer by recristallization of W carbides grains and by formation of coherent structure in Co-binder.
[Ca (2,2′-Bipyridine)3]2+-Intercalated Montmorillonite: An Application as Potentiometric Sensor
Authors: Payungsak S. , Wongchaisuwat Atchana , Meesuk Ladda
Published: January 2012

This article involves the use of [Ca (2,2′-bipyridine)3]2+-intercalated montmorillonite as a potentiometric sensor to measure anions in aqueous solution. The [Ca (2,2′-bipyridine)3]2+-intercalated montmorillonite was prepared by modification of an in situ solid-solid reaction, between natural Ca (II)-montmorillonite and 2,2′-bipyridine at a molar ratio 1:3. The formation of [Ca (2,2′-bipyridine)3]2+- in the interlayer space of montmorillonite was confirmed by powder X-ray diffraction (XRD) and the existence of 2,2′-bipyridine was confirmed by the C:N ratio of the product compared with that of the 2,2′-bipyridine molecule. The potentiometric sensor was constructed by mixing [Ca (2,2′-bipyridine)3]2+-intercalated montmorillonite with artificial graphite, polytetrafluoroethylene (PTFE) and carboxymethylcellulose (CMC) in an appropriate ratio. It was found that the sensor had higher sensitivity to S2- rather than other anions, graphs of log [S2-] vs voltage (mv) gave a slope 30.0 which was closed to theoretical value, 29.5. Activity of the [Ca (2,2′-bipyridine)3]2+ sensor was verified by using sensor made from Ca (II)-montmorillonite as a reference. Reproducibility and precision of the electrode were also determined.
Lead as Test Rolling Material for Hot Complex Rolling of Steel
Authors: Tober Gerhard , Anopuo Okechukwu , Maier Petra
Published: January 2012

The low deforming force of Lead (Pb) and the proximity of its stress-strain response make it readily preferred as test material for laboratory modelling of complex hot steel rolling. Structural steel recrystallises from a temperature of approximately 500 °C. For Pb, this process starts within the range of-3 °C to 0 °C. The room temperature rolling of Pb delivers reasonable information of hot rolling of steel. This is however dependent on various parameters which include; deformation rate, degree of deformation, alloying elements and previous heat treatments. This work studies the deformation behaviour of Pb 99.94 Cu by carrying out rolling operations at different deformation rates and deformation degrees. Tension and compression tests were used to determine the ultimate tensile and compression strength, the yield strength and the Young´s Modulus, respectively. Flow curves were subsequently determined and compared to that of selected structural steels. The microstructures were analysed and were correlated with the deformation parameters taking cognisance of the role of recrystallisation during the rolling process.
Application of Digital Image Processing and Recognition Technology on Screen Printing
Authors: Chen De Yu , Hang Yue Qin , Su Xiao Cheng , Zhu Xue Fang
Published: January 2012

The digital image processing and recognition technology is applied to the detection of the print quality of screen printing, which is designed to implement the application system of some functions in screen printing, such as the acquisition of multiple printing images, the feature extraction and the matching to the quality control processing. In the RG Chromaticity space, the template matching method is used to design the relevant algorithms and realize fast real-time detection of some problems related to the image dislocation, leakage India, infiltration excess and uneven quality color. Having been tested and run, the method appears good quality monitoring results and economic benefits.
A Study of Space-Borne Sliding Spotlight SAR Imaging Algorithm
Authors: Chen Ying Ying , Jia Xin
Published: January 2012

In recent years, a new operating mode for Synthetic Aperture Radar (SAR) system, that is sliding spotlight mode. This mode has many advantages, such as, it has better azimuth resolution than stripmap mode. At the same time, the sliding spotlight mode has better coverage than the spotlight mode. In this paper, we present the sliding spotlight mode algorithm and analyze its azimuth resolution and coverage. The simulation results prove it.
Relationship of Flux Harmonics and Partitioning Method of Zero Voltage Vectors
Authors: Wu Zhi Hong , Chen Guo Qiang , Zhu Yuan , Tian Guang Yu
Published: January 2012

Aiming the traditional space vector PWM with equal duration of the two zero vectors, the paper introduces the principle of SVPWM. The harmonic is analyzed based on formula expression, numerical computation, and graph presentation. The optimal zero vector partitioning method is proposed. Finally, the interpolation method and discretization of the optimal method are proposed and discussed.
The Motion Analysis of the Sub-Nanometer Wood Flour in the Processing
Authors: Yang Chun Mei , Ma Yan
Published: January 2012

In this paper the concept of particle size of sub-nanometer wood flour is proposed. The preparation process of sub-nanometer wood flour is analyzed; the equipment structure and principle are discussed in view of a larger practical significance of the sub-nanometer. The theory of grinding sub-nanometer wood flour adopting the methods of circular cutting, grinding and air separation is put forward, in view of the grinding limit, energy consumption laws and physical properties of particle size of wood flour. In the grinding process of sub-nanometer wood flour, the grading equipment and the grinding equipment will be combined into one system, which will filter out the sub-nanometer wood flour constantly which have reached the requirements of mesh number , while the wood flour not meeting the requirements will be put back into the grinding room and processed circularly. In this Process, not only the situation of reunion of fine particles have been reduced and the energy utilization have been improved, but also mesh number of product, uniformity of particle size distribution and consistency for the quality of sub-nanometer wood flour have been ensured, while machining efficiency have been improved.
The Technique of Shape-Based Multi-Feature Combination of TradeMark Image Retrieval
Authors: Zhang Cong , You Fu Cheng
Published: January 2012

At present, the technique of trademark image retrieval based on multi-feature combination of the shape mainly includes single-feature global matching or local matching and multi-feature matching, which is playing a more and more important role in the area of the trademark image retrieval. In this paper, due to the deficiency described by some single shape-based features, the technique of the multi-feature combination trademark image retrieval is proposed based on the region and the edge of a shape. Firstly, a trademark image is segmented with region growing, then low order Hu moments and eccentricity are extracted on the resulting region, which is able to express the local information of the image; Secondly, there is an extraction of Compactness and Convexity, which describe the global feature of the image, on the edge extracted with Canny. At last, the combination of the multi-feature is applied to get a Euclidean distance. Good results have been obtained in the following experiment, which proves the multi-feature combination way is better than other single-feature ways.
The Technology of Line-Spectrum Enhancement Based on Image Processing
Authors: Zhu Dai Zhu , Huang Wen Hua
Published: January 2012

Time-frequency spectrogram analysis is a basic method in passive radar and sonar. It′s necessary to enhance the line-spectrum to improve the performance in low SNR(Signal to Noise Ratio) and strong interference presented that wider detecting range and long reacting time can be obtained. The traditional line-spectrum enhancing technology based on signal′s coherence can′t work well in very low SNR, and the performance will drop sharply when the line-spectrums are close in frequencies or the number of line-spectrums increases. A new method which combines image processing with signal processing is brought out to overcome these defects. It can work well when the SNR in frequency domain is close to 0dB,which is much lower than ALE and other traditional technology. The results derived from simulation and trial data analysis show that it′s stable and can be applied in the field with line-spectrums.
Novel Chaotic Behaviors and Evolutions for the Nonlinear (3+1)-Dimensional Burgers System
Authors: Li Bang Qing , Ma Yu Lan , Xu Mei Ping
Published: January 2012

Based on the non-traveling wave solution and a chemical chaos system, chaotic soliton excitations are established for the nonlinear (3+1)-dimensional Burgers system. The chaotic behavior and chaotic evolution of the system are studied.
Design of Tension Control System of Fiberglass Winding Machine Based on Fuzzy Logic Control Algorithm
Authors: Zhou Qing Gui , Huang Da Zhi
Published: January 2012

Winding tension is one of the most important factors that affects the winding products' quality. This paper introduces a method to develop tension control system based on data acquisition card, and presents the block diagram of the system which actuators are AC servomotors. In order to meet the demands on tension control system, such as good stability, strong robust and etc., this paper proposes a tension control method which is based on the fuzzy control theory.
Study on Ground Surface Roughness of Engineering Ceramics Based on Grayscale Information
Authors: Tian Xin Li , Wang Jian Quan , Guo Fang , Lin Ke Ling
Published: January 2012

Surface roughness is one of the key factors to evaluate the grinding quality for engineering ceramics. This study introduces a new method based on grayscale information of surface images, to assess and predict the roughness of ground ceramics rapidly and effectively. The investigation sets the functional parameters of digital acquisition device as Brightness 140, Contrast 42, Saturation 24 and Acutance 9. Afterwards, it selects the mean value and the mean square deviation to describe surface roughness, and some image processing techniques are adopted to reduce noises and enhance the images. Lastly, it gives the relation curves on Ra，Rz，Ry versus grayscale information, and concludes a direct proportion law between the grayscale information and ground surface roughness.
Study on Construction Technique of Complex Multi-Layer Steel Structure
Authors: Zheng Shu Ping , Chen Xuan
Published: January 2012

This paper makes a study on the stress and deformation of complex steel structure in the process of hoisting and erection combining with an actual project, to determine the proper hosting and erection techniques in order to offer references and examples for other similar engineering construction. Tianjin Gallery is one of six projects of Tianjin Cultural Center. The steel structure project has an intense time limit, complex project requirements, heavy major diameter steel pipe columns, roof steel trusses in large quantity and huge work amount. In this study, we made a computational simulation and analysis to the work progress using ANSYS to find out the weak links and key control points of work progress in advance. Meanwhile, we monitored and controlled the whole process. The actual monitoring results tally with theoretical calculation data.
Laser Cladding of Ni60/WC/TiN Composite Coatings on 00Cr13Ni4Mo Hydro Turbine Blade Stainless Steel for Improvement of Wear Resistance
Authors: Huang Kai Jin , Jiang Hua Rui , Lin Xin
Published: January 2012

To improve the wear property of 00Cr13Ni4Mo hydro turbine blade stainless steel, Ni-based composite coatings were fabricated on 00Cr13Ni4Mo stainless steel by laser cladding using mixed powders of Ni60, WC and TiN. The microstructure of the coatings was characterized by XRD and SEM techniques. The wear resistance of the coatings was evaluated under dry sliding wear condition at room temperature. The results show that the coatings mainly consist of Ni-based solid solution, WC and TiN phases. The coatings exhibit excellent wear resistance due to its high hardness of WC and TiN phases. The main wear mechanisms of the coatings and the 00Cr13Ni4Mo sample are different, the former is abrasive wear and the latter is adhesive wear.
Photocatalytic Degradation of ABR X-3B on TiO2-HZSM-5 Composite
Authors: Zhang Wen Jie , Li Qian , He Hong Bo
Published: January 2012

TiO2-HZSM-5 composite was prepared by solid state dispersion method using phosphoric acid treated HZSM-5 zeolite and TiO2. The composite was studied for photocatalytic degradation of an azo dye ABR X-3B. When TiO2 content in the composite was 10%, decoloration rate increased almost linearly with increasing TiO2 concentration. Too low of TiO2 content was in accordance to low decoloration rate due to insufficient photocatalyst existing. The maximum decoloration rate appeared as 60% removal of the initial dye, when TiO2 content was 10%. When TiO2 concentration was 80 mg/l, decoloration rate on composite photocatalyst was 97.6% after 70 min of irradiation, which was 25.9% higher than that on pure TiO2.
Graphene Oxide Containing Composite Hydrogel Fabricated by Freeze/Thaw Method
Authors: Wang Wen Chao , Li Zhi Liang , Wu Jian Juan , Yi Mao Cong , Liu Yu , Gao Jian Ping , Wang Wei , Yan Jing
Published: January 2012

Graphene oxide (GO) was used as inorganic fillers to enhance the mechanic properties of graphene oxide/poly(vinyl alcohol) composite hydrogels that were prepared by freeze/thaw method. The structure and properties of the composite hydrogels were characterized. Since GO was well dispersed in polymer matrix, the composite hydrogels showed an outstanding mechanical improvement. Significant increase in Young's modulus and compressive strength was achieved, indicating a good load transfer between fillers and matrix.
Preparation of Nano-TiO2 and Performance Study on Photocatalytic Degradation of Methylene Blue
Authors: Liu Jiang , Ma Zheng Xian , Liang Shuai
Published: January 2012

Experiment of photocatalytic degradation was conducted through using tetra-n-butyl titanate and ethyl alcohol as raw material, adopting sol-gol method to prepare photocatalyst of nano-TiO2 and using methylene blue solution as analogue dye wastewater. The influences of hydrolyzing temperature, PH value, different water addition, and different speed of adding drops were investigated, as well as the reuse rate of photocatalyst.
Investigation of Tube Drawing Process by Finite Element Simulation
Authors: Li Yong Hua , Zhang Jing , Liang Xin Jun , Shi Wei Hua , Kang Ming
Published: January 2012

Tube drawing is a convenient route to manufacture near net tubular product with high accuracy. In this paper, the tube drawing process was investigated through finite element method. The metal flow rule of tube drawing and influence of mold conical angle on the drawing force and equivalent strain during tube drawing process were studied. The reasonable mold conical angle was obtained from the simulated results.
Comparison and Analysis of Two Auditory Models Faced to Mechanical Faults Diagnosis
Authors: Li Yun Gong , Zhang Jin Ping
Published: January 2012

Auditory model is a signal analysis system with simulating the mechanism of the human auditory system, and it is not only suitable for speech signal but also vibration signal for mechanical faults diagnosis. In this paper, the work of analysis and comparison for EA and ZCPA auditory model is done. The reason and characteristics of simulation mode of auditory nerve in two auditory model is illustrated. By analyzing vibration signals of different rotor faults, the performances of distinguishing different faults and stability for one kind fault for two models are compared. The results show that ZCPA model is more flexible and stable.
The Study on the Flocculation Effect of Modified Collagen Protein Cationic Flocculent on Waste Drilling Fluid
Authors: Zhang Sha , Wang Xue Chuan , Zhou Liang , Qiang Tao Tao
Published: January 2012

Glyoxylic acid was used to carboxylic collagen protein which obtained by the hydrolysis of gelatin. Al (Ⅲ) was complex to it with aluminium tanning principle in tanning chemistry and the novel flocculent (CGAl) was prepared. Use CODcr removal rate, suspended solid and chroma to indicate the flocculation effect on waste drilling water. The results indicated that when CGAl was used, its dosage was 10.5g/L and the range of pH and temperature were widely. After flocculation, CODcr removal rate was 92.3%, suspended solid decreased from 2115mg/L to 65mg/L, and chroma reduced from 1003 times to 6 times. So the flocculation effect was obviously.
Study on Magnetic Abrasive Machining for the Small Hole
Authors: Cheng Jun Hong , Wu Long , Zhang Wei Jie
Published: January 2012

In this paper, the principle of magnetic abrasive machining for inner surface of the small hole is introduced. By the experiment of magnetic abrasive machining on the quenched steel inner surface of the smaller hole, some technical findings have been achieved. It is: the abrasive magnitude and the roughness of the machined part vary with the duration of grinding, magnetic induction strength and machining clearance. According to the testing data, the workable optimum parameters of magnetic abrasive machining for inner surface of the small hole is summarized, which can be used as reference in real practice.
New Ajax Post Method for Multi-Field Data Including Rich Text
Authors: Gan Cai Jun , Zhou Ya
Published: January 2012

A new Ajax (Asynchronous JavaScript And XML) post (NAP) method for multi-field data including rich text is presented. By reasonable construction of multi-field data structure and using a new server-side analytical algrithm,the method cleverly avoids abstacles which arises in a conventional Ajax post (CAP) method.Test results show that the method is more stable and reliable than CAP method and performs much better than a traditional form post (TFP) method obviously in saving network flux and reducing response time.
The Application of PCA and SVM in Rolling Bearing Fault Diagnosis
Authors: Li Meng
Published: January 2012

The key to the fault diagnosis is feature extracting and fault pattern classifying. Principal components analysis (PCA) and support vector machine (SVM) method are introduced to recognize the fault pattern of the rolling bearing in this paper. Multidimensional correlated variable is converted into low dimensional independent eigenvector by means of PCA. The pattern recognition and the nonlinear regression are achieved by the method of SVM. In the light of the feature of vibrating signals, eigenvector is obtained using PCA, fault diagnosis of rolling bearing is recognized correspondingly using SVM fault classifier. Theory and experiment show that the recognition of fault diagnosis of rolling bearing based on PCA and SVM theory is available in the fault pattern recognition and provides a new approach to intelligent fault diagnosis.
Application of DSM Topological Sort Method in Business Process
Authors: Yuan Hui Lin , Wang Ding Wei
Published: January 2012

Because of its unique role in the information flow analysis, the design structure matrix (DSM) is widely used to the optimization of the organization, parameter and other aspects. Its matrix representation, the dynamic features make it possible that be applied to optimization of business processes, but so far the DSM in the business process application is also rare. In the paper, DSM is tentatively applied to topological sort in the business process and is compared to the traditional topological method. These explorations for the application of the DSM in the optimization of business processes are positive.
Effect of Fe Doping on the Morphology of Hydrothermally Derived BaTiO3 Crystals
Authors: Yang Lin Lin , Wang Yu Jiang , Huang Shun Li , Wang Yong Gang
Published: January 2012

Pure phase Fe doped BaTiO3 crystals have been successfully fabricated at 200°C with 0.7M KOH by a hydrothermal method. The obtained products were characterized by X-ray diffraction (XRD) and transmission electron microscopy (TEM). An obvious morphology evolution from hexagonal shape to sphericity was observed when Fe doping concentration was increased from 0% to 1%, 3%, 6%, and 10%. In addition, the size of the obtained Fe doped BaTiO3 crystals obviously became smaller. The possible mechanism was also discussed.
Designment Algorithm on Orthogonal Two-Directional Vector-Valued Wavelets with Three-Scale Dilation Factor
Authors: Zhao Jian Tang
Published: January 2012

In this work, the notion of orthogonal two-directional shortly supported wavelets with poly-scale is developed. A new method for designing two-directional orthogonal wavelet wraps is proposed and their properties is investigated by means of time-frequency analysis methodand, operator theory. The existence of shortly supported orthogonal two-directional vector-valued wavelets associated with a pair of orthogonal compactly supported vector-valued scaling functions is investigated. A new method for designing a sort of orthogonal shortly supported two-directional vector-valued wavelet functions is presented by using multiresolution analysis and matrix theory.
A Modified Dual-Wavelength Matrix Calculation Method for Fiber Bragg Grating (FBG)
Authors: Liu Xin
Published: January 2012

Fiber grating is an optical passive device which is developed very fast in recent years. FBG is the most grating which is used as fiber sensor. Cross-sensitivity of fiber grating sensor is an important problem which is restricted the development of the fiber sensor. We do a deep research on the cross-sensitivity problem of the Fiber Bragg grating in this paper. Based on the basic principle of how the cross-sensitivity problem is produced, we suggest a modification in a dual-wavelength matrix calculation method which is used to solve the cross-sensitivity problem in traditional. The modified dual-wavelength matrix calculation method has a higher accuracy than the traditional method.
The Communication Feedback Creates a Two-Winner ~ Cognitive Model for Explaining Client-Architect Interaction
Authors: Huang Mei Luan , Wang Yaw Yih
Published: January 2012

The client is literally the start point of every architectural design. In architectural projects, complex as they are, it is unlikely that the clients would be able see all their needs from the very start. Demands and wantings float out of the surface as the design proceeds. Client-Architect meetings go on from the very start to the very end of each project. It is very likely that “client needs” also known as “design problems” to the architects may shift and change with time. Previously, research on design cognition focuses on the designer end and how they face “problem-solving”. Very often they forget these “problems” are alive. As the design progresses and grows so do client needs and demands. The goal of this research is to look into client-architect interaction in hope to conclude a cognitive model that can help us understand the dynamics.
Flow Stress Behavior of Nanometric Al2O3 Particulate Reinforced Al Alloy Composites Manufactured by Casting
Authors: Zhang Zhi Min , Yang Yong Biao , Zhang Xing
Published: January 2012

The flow stress behavior of nanometric Al2O3 particulate reinforced Al alloy composites were investigated using thermal simulation machine Gleeble-1500. Microsturctural analysis were carried out on optical microscopy. The results showed that the flow stress increased with increasing strain rate and decreased with decreasing temperature. Dynamic recovery and dynamic recrystallization occurred during hot compression of the Al composites. The grain size increased with increasing temperature (590k-710k) and decreased at 750k due to dynamic recrystallization. The grain size decreased with increasing strain rates at 750k.
A Novel Method to Compress Real-Time Process Data
Authors: Zheng Xiao Jian
Published: January 2012

Most existing real-time data compressing algorithms are focused on dynamic and inconstancy of the process data, but a basic observation is ignored with some unexpectedness: on condition that sampling interval is not large, difference between amplitudes of real-time process data from two neighboring samples is relatively small, and most of data amplitudes are in the same range. In this paper we propose a compression algorithm based on the observation and experimentally evaluate the proposed approach and demonstrate that our algorithm is promising and efficient.
Finite Element Modeling of Deep Drawing of Coated Sheet
Authors: Zhang Xiao Bing
Published: January 2012

The deep drawing process is one of the important sheet-metal forming processes. Using this operation, many parts are manufactured in various industries. With this regard, the numerical simulations of a kind of coated sheet deep-drawing process were conducted using LS-DYNA in this paper. The model takes into account the coating/substrate composite may delaminate or crack during drawing, the combination of coating and substrate was defined as tied with failure contact. The results of the simulations revealed that the substrate (steel sheet) and the nickel coating did not delaminate at the interface. Furthermore, it was found that the punch-nose radius is the danger zone for the break and at this zone, the thickness of the coating was thinner than the substrate, some experiments were done to validate the simulated results. At last, the influences of friction coefficients were analyzed and the result that greater friction coefficients will lead to increase the tendency of crack was attained.
Influence of an Anti-Chloride Corrosion Admixture on Density of Cement-Based Materials
Authors: Zhang Wei , Yao Xiao , Mu Ru
Published: January 2012

A new admixture increasing the density of cement-base composites and hence preventing the penetration of chloride ions is developed and investigated. The new admixture is the combination of traditional mineral admixture and steel bar inhibitor. The composition of the admixture is optimized using water absorption tests. Then the effect of the new admixture on the workability of freshly mixed cement paste as well as the pore structure and SEM analysis of hardened cement paste is experimentally investigated. The results show that the new admixture is effective to increase the density of cement-based materials.
Production Process and Nondestructive Testing of Soybean Stalks Particleboard
Authors: Lu Wei , Yao Jia , Han Ping , Wu Wan Jiang , Liu Chuang
Published: January 2012

Orthogonal experiment of four factor and three level has been adopted, through the process analysis of the various factors on mechanical properties, the best process conditions of soybean stalks particleboard are chosen as: density is 0.7g/cm3, glue content is 12%, and hot pressing time distribution is 3+4 minutes, hot pressing temperature is 175°C. The Ef (the dynamic elastic modulus of NDT) of soybean stalks particleboard has been examined by flexural vibration method of FFT(Fast Fourier Transform), the regression between Ef and MOE(modulus of elasticity), MOR(modulus of rupture) is significant and existing high relevance degree, so using FFT method for NDT of composite materials is feasible.
Ultrafine Glass Fiber Core Material Produced by Wet Method
Authors: Xu Teng Zhou , Chen Zhao Feng , Zhou Jie Ming , Cheng Xue Yu , Wu Wang Ping , Chen Zhou
Published: January 2012

Glass fibers have non-flame, non-toxic, antisepsis, light volume-weight, low heat conduction factor, good chemistry stability, low water absorption coefficient and good hydrophpbic coefficient. In this paper, ultrafine glass fiber core material was produced by wet method. Performances of ultrafine glass fiber core material and VIP were introduced. The thermal conductivities of ultrafine glass fiber core material is about 0.02966 W/(m•K). Ultrafine glass fiber core material with about 92%-98% porosity ratios makes it easy to reach high vacuum degree for VIP. The thermal insulating capacity of VIP is about 10 times higher than that of conventional insulating materials. Ultrafine glass fiber core material is ideal core material for VIP.
The Optimum Design on the Roller Chain Drive of the Machine for Supplementing the Traditional Chinese Pills
Authors: Jiang Dong Hua , Shao Dong Wei , Luan Ji Yi
Published: January 2012

The roller chain drive of the machine for supplementing traditional Chinese pills has movement characteristics of gear drive and belt drive, and its movement is a little complex, so interior point penalty function method is applied in the optimum design of chain. First of all, the optimizing mathematical model is built by applying the interior point penalty function method, and the design variables, the target function and constraints are proposed, and then the optimal solution for key parameters of drive chain is obtained by the iterative, which will provide the reference and basis for the research on big drive power and the least rows number of drive chain.
The Application in Hydraulic Elevator System with the Secondary Element in the Network of Hydrostatic Transmission with Secondary Regulation
Authors: Wang Ai Fang , Liu Xiao Chun , Zhou Ping
Published: January 2012

The Secondary Element in the Network of Hydrostatic Transmission with Secondary Regulation is a kind of advanced technique with good control and application properties, it has extensive prospect in the energy conversation application. From these characteristics, this paper presents several kinds of energy-saving and reuse of Energy technologies with Secondary Regulation, comprehensively analyzes and explains its’ application prospects and research directions in Hydraulic Elevator System.
Sequestration of Reactive Light-Yellow K-4G by Free Mycobacterium phlei Cells and its Extracellular Polysaccharide
Authors: Wang Yuan Hong , Liu Zhong Ya , Ding Chao , Xing Hong Qiqo
Published: January 2012

Production of extracellular polysaccharide by the culture of Mycobacterium phlei were examined, using molasses wastewater to replace glucose as carbon source and energy source in the culture medium. Results showed that the COD concentration in molasses wastewater favorable for the growth of the Mycobacterium phlei cell was 5000 mg•L-1, and inoculum size of 5%(v/v), 28°C, initial pH 7.0 and shaking speed of 150 r•min-1, under the optimal culture conditions, the highest flocculating activity achieved for Kaolin suspension was 95.5% and 5.0 g cell/L broth was obtained. The Mycobacterium phlei cell was effective in flocculating some soluble reactive dye in aqueous solution, reactive Light-Yellow K-4G with a decolorization efficiency of 93.5%, respectively, using 20 mL of the flocculant in 500 mL of 100 mg•L-1 dye solution.
Failure Analysis of Aircraft Aluminum Alloy Structures in Coastal Environments
Authors: Pan Bo , Jiang Tong Min , Jin Jing Min , Ma Mao Dong
Published: January 2012

The failure of aluminum alloy stringer on the tour airplane servicing in the coastal environment of the Fiji Islands were analyzed. Through the analysis of surface topographies and failure characteristics and the consideration of service environment, the evolvement of failure process and the failure mechanisms were analyzed. Findings showed that ultraviolet radiation, temperature, high-humidity and salt spray caused the aging failure of structure coating and then pitting corrosion occurred in the oxide film on aluminum alloy. With the ongoing corrosion along the grain boundary, intergranular corrosion appeared. When the intergranular corrosion continued developing to the adjacent layers, denudation occurred. The volume expansion effect of corrosion products caused the stress concentration on the tip of corroded area and resulted in the initiation of cracks.
Design of a Digitalized Testing System for Simple Beam Charpy Impact Testing Machine
Authors: Zheng Yong , Wang Jin Li , Ye Yuan Wei , Jiao Jing , Wang Gang , Deng Yi Guo , Qin Shuang Mei , Peng Zhi Lian
Published: January 2012

In order to facilitate the recording, displaying and computer statistical analyzing of experimental data, digitalizing modifications were made on the testing system of a simple beam Charpy impact testing machine with an incremental rotary encoder, a Siemens CPU224 PLC and ForceControl Configuration Software. Hardware and software designs were made for the testing system. The improved system can automatically record impact absorbing energy and pendulum angle, real time display and print impact energy diagrams by computer, and it can also output the measure results in EXCEL format which is convenient for data analysis and processing.
Study on Application of Membrane Materials in Home Decoration Design
Authors: Yu Tian Tian , Hu Wei Ping
Published: January 2012

the application of membrane materials in construction and interior design did not attract much attention until the application of membrane in Water Cube. By applying new building materials to home decoration design, we can make interior design more brilliant and meet high-end pursuits. Membrane materials are lightweight, tensile, pliable and highly resistant to UV and chemicals. They have long useful life, self-cleaning ability, translucence and high melting point. The application of these materials will make villa design refreshing. Besides meeting people’s needs for a comfortable living, they are also more environment-friendly.
Polaron Effect on the D- Center at the InP(GaP) Heterointerface in a Magnetic Field
Authors: Zhang Xiao Yan , Fan Guo Liang
Published: January 2012

Effect of polaron on the spin triplet state (p-like) of the center is discussed by means of variational principle and second-order perturbation theory. Numerical results are produced for heterostructures of InP(GaP) in a magnetic field. We find that the polaron correction is very important. The contribution of the polaron is not negligible.
Finite Element Optimization Design of the Movable Jaw on PC5282 Jaw Crusher
Authors: Guo Nian Qin , Huang Wei Ping
Published: January 2012

According to the performance parameters of the main structure of the jaw crusher PC5282, movement simulation of its mechanism was done to get trajectory and the stress analysis. The three-dimensional model of the movable jaw was set up. On the COSMOSWORKS platform, finite element analysis of the movable jaw was finished to reveal the distribution laws of stress, displacement and deformation. The structure optimization of the movable jaw was also done to lighten the weight. All research was to provide references for improvement design of the movable jaw.
The Non-Linear Analysis of Cable
Authors: Sun Xiao Yu , Wang Zhen Qing
Published: January 2012

The paper reports an investigation on a continuous model for dynamics of cables, taking bending stiffness and sag extensibility into account. The new approach involves the use of derived sensitivity coefficients associated with various cable parameters of interest, and use these coefficients to achieve optimal cable performance. The fatigue damage is calculated in the time domain through an adequate cycles counting method. A discussion of the influence of the Irvine parameter on the total fatigue damage is then performed. A Monte Carlo parametric analysis on a case-study,representative of a suspended cable typical of overhead power-line applications, especially in cyclic exposure, exceeds the present chromate-based systems.introduces a discussion on the convergence of the modal expansions and highlights the respective importance of the different classes of non-linear terms included in the model.
Synthesis and Luminescent Properties of Europium Chloride with DPA Complexes
Authors: Cheng Zhi Ming , Zhang Fu Jun
Published: January 2012

In this paper, the solid-state reactions between EuCl3 and pyridine dicarboxylic acid (DPA) are studied. The complex is synthesized by one step solid state reaction at room temperature and the material was characterized by element analysis, fourier transform infrared (FTIR) spectra, absorption and fluorescence spectra. The compositions of complex has been confirmed to be [Eu (DPA)2(Cl)2]•6H2O. Organic light emitting diodes based on the structure of ITO/PEDOT:PSS/PVK:PSS/PVK:Eu/Bphen (12 nm)/LiF(1 nm)/Al were fabricated, the electroluminescence of Eu3+ complex was investigated under different driving voltage.
Application of Equipartition of Entropy Production Principle in Plate Heat Exchanges with Different Corrugation Angles
Authors: Guo Chun Sheng , Du Wen Jing , Cheng Lin
Published: January 2012

The thermal and hydraulic performances of working fluid in a cross corrugated channel has been investigated, numerically by a three-dimensional model with a corrugation Plate Heat Exchanger (PHE). The study based on Tondear and Kvaalen’s work that the entropy production uniformity is closely related to the heat exchanger performance, mover an entropy production uniformity factor is defined and used to optimize a corrugation PHE. The entropy production uniformity Criteria and the Performance Evaluation Criteria of the corrugation PHE with two different corrugation angles have been discussed.
Ultrasonic Assistance in Electrofinishing and Grinding on Cylinder Surface
Authors: Pa P.S.
Published: January 2012

For the purpose of elevating the efficiency of the surface finish to reach the fast improvement of the roughness of the cylinder surface, a new finish module combination of electrofinishing, grinding, and ultrasonic assistance is investigated. The present study discusses the surface roughness of YCS3 materials after traditional machining (turning, drawing, rolling, extrusion, etc.), of which the cylinder surface used a design finish-tool includes a ring-form electrode and a nonconductive grinding wheel to execute the continuous processes of electrofinishing and grinding. In the experiment, the external cylindrical workpiece is put into the compound circular finishing-tool to execute the polishing processes by automatic continuity production. The ultrasonic energy is used to transmit to the electrolyte. By the compound production of electrofinishing and grinding, the multiple effects not only included polishing processes of electrofinishing and grinding but also included the ultrasonic assistance from the ultrasonic energy is transmitted to the electrolyte to assist the dregs and cuttings discharge during polishing processes.
Experimental Study of Influence of Grass Coverage on Runoff Shear Force of the Slope Surface
Authors: Wu Qing , Chen Yuee , Zhang Lu
Published: January 2012

Through outdoor artificial simulation test, the influence of the grass coverage on runoff shear force of the slope surface was studied. The results showed that the slope surface runoff shear force decreased with the increase of the grass coverage. In the experimental condition of 30° slope and 5L/min flow magnitude, runoff average shear force of the bare slope, low coverage and high coverage of the slope surface were respectively 0.9 Pa, 0.5 Pa and 0.3 Pa. The fluctuation changing range along the riser and the test diachronic of the slope surface runoff shear force of all kinds of slopes decreased with the increasing of the grass coverage.
Steady Sate Modeling of LHP and Analysis
Authors: Chen Yan , Chang Wei , Zhang Shu Sheng , Guo Chun Sheng
Published: January 2012

An ammonia-stainless steel steady state modeling of loop heat pipe was established, the impacts on the LHP operating temperature induced by alterable heat loads under 3 operating cases (the different position between evaporator and condenser, the changing of ambient temperature and the changing of heat sink temperature) were analyzed and conclusions were made. Changing the position between evaporator and condenser has a significant influence on the LHP operating temperature. Anti-gravity operation will reduce the performance of the LHP, this phenomenon is obviously in low heat load range. Further more, increasing of fluid pressure drop in the loop will induce decreasing of the LHP performance. The temperature difference between ambient and heat sink will influence the transition heat load (from variable conductance mode to fixed conductance mode), the bigger the temperature difference the higher the transition heat load.
AirСar CAES-Compressed Air Energy Source-Compendium
Authors: Wyczalek Floyd A. , Suh Chung M.
Published: January 2012

This paper is a re evaluation of CAES Compressed Air Energy Source. CAES is not new, experimental air car compressed air propulsion vehicles appeared in early 1900’s, and are currently exemplified by the India Tata Motors AirCar MiniCat based on the French MDI Motor Development International AirCar. (see Ulf Bossel, European Fuel Cell Forum) This study focuses on compressed air potential pressure specific energy density and specific power, ideal Global thermodynamic cycle efficiency, US EPA 23 cycle urban driving test schedule overall drive train ideal efficiency and vehicle ideal range. CAES analysis is unique because compression and expansion cycles are remotely linked solely by ambient atmosphere e.g., compression occurs in a stationary device while expansion takes place in a mobile vehicle. Therefore, ideal thermodynamic compression and/or expansion cycles can be treated independently and linked as isothermal entities e.g., both cycles are in fact separate ideal complete compression and/or complete expansion cycles without (TDC) top dead center piston clearance with isothermal ambient temperature compressed air storage. Further, CAES potential pressure energy density and power density are comparable to electro-chemical energy sources on a Ragone chart, e.g., CAES specific energy density and specific power based solely on stored pressure energy potential are similar to the Pb-Acid battery. However, modern forms of multi stage expansion air motors with heat exchangers between stages extract additional thermal energy directly from ambient air to increase vehicle range by a factor of ~ 6 with a four stage expansion motor. To minimize road-load energy consumption air powered vehicles are characterized by low curb (empty) vehicle mass and low speed urban traffic. Based on Tata AirCar design specifications, comparative theoretical driving range tests were simulated with the 23 cycle US EPA Urban (City) driving schedule and a modified low speed 23 cycle Urban schedule suitable for India. We concluded modern multi stage air car propulsion may find applications in temperate zones, particularly highly congested pedestrian trafficked city streets and retirement communities such as Sun City, AZ, India [5a-19a]