bluuebunny/crossref_metadata_2025 huggingface dataset:
Study on the Dyeability and Hygroscopicity of Polypropylene/Cellulose Acetate Butyrate Fibers by Melt Blending
Authors: Li Shan , Li Guang , Wang Li Yan
Published: February 2012

Polypropylene/cellulose acetate butyrate(PP/CAB) blend fibers were prepared through melt blending and spinning. The dyeability, hygroscopicity, mechanical properties were investigated. The results showed that additional CAB could improve the dyeability and hygroscopicity of PP fibers. With increasing amount of CAB, the dyeability and hygroscopicity was also increasing. The tensile strength and elongation at break exhibited reduced with increasing content of CAB.
A Study on Face Strain and Interlaminar Stress of Bamboo Plywood
Authors: Han Jan , Liang Chao
Published: February 2012

The face strain and interlaminar stress of bamboo plywood were studied through finite-element analysis (FEA). The study results showed that under the action of centralized cross line load, the upper face strain (compression strain) of the board gradually increased and the lower face strain (tensile strain) gradually decreased from the middle section to two ends of the board. The stress components（σz、τxz、τyz）between the each two layer, in the thickness direction, were symmetrical on the plane y＝37.5mm，and reached maximum nearby the free edges, but were nearly zero in the board. Within the limit of small deformation，the stress components between the each two layer, in the thickness direction, increased linearly with the load increasing, which resulted in the interlaminar cracking of the product at the free edges.
Accurate Faraday Measurement System for PBB Glasses in Current Transducer Application
Authors: Chen Qiu Ling , Wu Chao , Yin Shi Yu , Chen Qiu Ping
Published: February 2012

An optical-electronic system for Faraday rotation measurement is designed and constructed to evaluate the verdet constant of magnetic -optical glasses. The works include the optical bench setup and development of software. PbO-Bi2O3-B2O3 glasses systems were fabricated and characterized by using the self-constructed optical bench and the obtained Verdet constants @632.8nm for glass PBB1 was verified by using a commercial powermeter (as detector). The developed measurement system showed characteristics of low cost, small size and accurate.
Predictive Control of DC/DC Converter Based on State Observer
Authors: Zeng Chen , Pan Deng Min , Zhang Li Yan
Published: February 2012

In this paper, we present an advanced way to control the DC/DC converter by using predictive control. As the current state of the circuit must be known while using the predictive control, state observer is applied to solve the problem that some variables of DC/DC converter can not be observed. Neural network optimization is used to solve the QP problems in single sample step of predictive control. Simulation results show that this approach can utilize fast converge property of neural network and the new control strategy turns out to be very efficiency.
Fabrication of Al-Based Matrix Composite Reinforced with WAl12 Intermetallic Particles by Press-Forming Process Using High-Energy Ball-Milled Powders
Authors: Cai Shu Guang
Published: February 2012

The 22wt%WAl12intermetallic particulate reinforced Al-based matrix composite was successfully fabricated by press-forming technology using high-energy ball-milled powders. X-ray diffraction analysis shows that WAl12reinforcement phase has been obtained after in situ reaction of Al matrix with W14Al86alloy at 620°C. The mechanical properties of the composite material were studied at room temperature. The Young’s modulus, microhardness and the maximum ultimate tensile strength of this composite material can reach 75GPa, 1.51GPa and 471MPa, respectively. The results show that there is a good interfacial bonding between the Al matrix and WAl12particles. However, the composite cannot be applied in high temperature environment because of its fairly low strength residual ratio.
Microstructure and Texture of Rolled Cu-0.2wt%Cr-0.5wt%Zr-0.1wt%RE(La)
Authors: Cao Jun Li , Huang Xin Min , Wu Yu Cheng , Qin Yong Qiang , Han He Bin
Published: February 2012

Cu-0.2wt%Cr-0.5wt%Zr-0.1wt%RE(La) was prepared by casting, quenching, rolling and aging. The microstructure was studied by electron microscope and the texture components were studied by electron backscattered diffraction. In the cast alloy, pure chromium distributed near the grain boundary as a strip shaped and Cu5Zr phase distributed in the interior of grain as a shape of granules. The texture components of the rolled plate include {110} and {112}. With the rolling ratio increased, {112} texture component became the primary rolling texture component. The strengthening effect was attributed to the refinement of the grain size. The electron conductivity was mainly affected by the misorientation of the grain size with a high rolling ratio.
Research on the Machining Methods in Machining Center
Authors: Cheng Chang
Published: February 2012

The machining center of SINUMERIK-802D system offers a large variety of machining methods. This paper compares a simplified cutter presetting method and several instructions that are less frequently used including rounding instruction (G1/G2/G3, RND), feed rate override instruction (CFC/CFTCP), helical interpolation instruction (G2/G3, TURN) and automatic input of radius compensation instruction ($TC_DP6) with other common instructions and introduces the flexible and simple application of these unfamiliar methods, in an attempt to provide some reference and inspiration for operators.
The Research on Improving the Salt Resistance of Bentonite Used in Geosynthetic Clay Liner
Authors: Huai Yang Yang , Dou Zhong Lei , Sun Zhi Ming , Zheng Shui Lin , Cui Hao Ran
Published: February 2012

Geosynthetic Clay Liner, a water-proofing material which takes polymer as its carrier and bentonite as its basis, has been widely applied in the seepage-proofing projects including irrigation works, gardening and roadbed. In order to improve salt-resistance of bentonite used in Geosynthetic Clay Liner in saline environment, this paper innovatively uses chemical methods to modify the bentonite material. The experimental result shows that the optimum conditions are 100% of acrylic neutralization degree, 0.04%MBA, 1.2%KPS and holding at 70°C for 1 h. According to results of soil moisture supply capacity (MSC), swelling capacity of modified samples raises 30% ~170%.
3D Numerical Simulation of Linear Friction Welding of 45# Carbon Steel
Authors: Liu Ze Min , Guo Zheng Hua , Zhao Gang Yao , Zhang Shu , Pan Ji Luan
Published: February 2012

A 3D finite-elements model of 45# carbon steel of linear friction welding is built with the dynamic explicit code ABAQUS/explicit based on the solution of several key techniques, such as contact boundary condition treating, material properties definition, meshing technology, etc. Then the reliability of the model is validated by comparison with experiments in the literature. Furthermore, numerical simulation and analysis of the linear friction welding process of 45# steel have been carried out by using the model. The temperature field of workpiece, the temperature change of center point of welding interface and the metal flow behavior of welding interface are showed in results.
Effect of Intercalated Agents on Thermal Deintercalation of Kaolinite
Authors: Chen Xing Gang , An Man , Sang Xiao Ming , Hou Gui Xiang , Yu Shou Wu , Shen Yi
Published: February 2012

A series of intercalated kaolinite with formamide, potassium acetate and acrylamide were prepared. The thermal deintercalation processes of these composites were studied using a combination of X-ray diffraction and thermal analysis technique. X-ray diffraction spectra showed acrylamide could be indirectly intercalated into kaolinite layers. The activatory energy of thermal deintercalation of acrylamide from kaolinite-potassium acetate composites was 15.60 kJ/mol, higher than that from kaolinite-formamide composites, 9.51 kJ/mol. The reason was that strong hydrogen bondings between acrylamide and potassium acetate were formed in kaolinite layers.
Value Accounting and Audit the Integrity of the Game Analysis
Authors: Wang Fu Guan
Published: February 2012

As the market's own flaws and disorderly competition in accounting and auditing intermediary market economic needs, resulting in value against the integrity of the CPA, there is a serious credibility crisis, has become China's CPA profession is facing the survival and development of key issues. From an economic perspective, the article use the game theory research tools in the commission of certified public accountants audit the integrity of the value, then presents a lack of good faith conclusion.
Tunable Ferromagnetism above Room-Temperature in Self-Assembled (In,Mn)As Diluted Magnetic Semiconductor Quantum Dots on Be-Doped AlxGa1-XAs Template by Molecular Beam Epitaxy
Authors: Guo Hao Min , Li Xin Hua , Zhao Zhi Fei , Wang Yu Qi
Published: February 2012

With the introduction of Be-doped AlxGa1-xAs template, self-assembled In0.79Mn0.21As quantum dots samples were prepared on semi-insulating (001) GaAs substrates by molecular beam epitaxy. High quantum dots density was confirmed by the atomic force microscopy. The ferromagnetism of the samples was revealed by superconducting quantum interference device magnetometer analysis at 10K, and the Curie temperatures ranging from 292 to 314K were able to be regulated by adjusting Al content and Be dopant in Be-doped AlxGa1-xAs templates, implying the feasible application of spintronic devices.
Effect of Al on Microstructure and Mechanical Property of NiAl-Mo Alloyed with Nb
Authors: Han Ping , Qi Yi Hui
Published: February 2012

Microstructure of the Ni-30Al-8Mo-2Nb alloy is dendrite of NiAl, Mo and small amount of Ni3Al phases, the Ni-40Al-8Mo-2Nb alloy is also dendrite of NiAl and Mo phases, and the Ni-50Al-8Mo-2Nb alloy is irregular dendrite of NiAl, Mo and small amount of NiAlNb(laves) phases. Upon the experiment, NiAlNb(laves) phase is only found in the Al-rich alloy. Compressive yield strength of the Ni-40Al-8Mo-2Nb alloy is higher than that of the Ni-30Al-8Mo-2Nb alloy, and much higher at low temperature or fast initial strain rate. TEM observation shows that the high temperature deformation of the Ni-40Al-8Mo-2Nb alloy is controlled by dynamic recovery and dynamic recrystallization.
Preparation, Characterization and Dielectric Properties of BT/PI Film
Authors: Lv Jun Jun , Li Ming Yu , Zeng Qing Xuan , Zhao Shuang
Published: February 2012

By using mixture solution method, Barium titanate/polyimide(BT/PI) composite film was prepared. Influence of different size and filling quantity of BT particles were investigated. The microstructure and properties of the products were characterized by scanning electron microscopy, X-ray diffraction and other analysis methods. The results show that when BT nanoparticles are used, the BT/PI film has better comprehensive performance. As the filling quantity of BT particles increases, the dielectric constant and dielectric loss of BT/PI composite film increase, and the dielectric strength is reduced.
Preparation and Properties of Long Wheat Straw Fibers Used for Composite
Authors: Pan Gang Wei , Hou Xiu Liang , Dong Zhen , Zhu Jing , Huang Dan , Yang Yi Qi
Published: February 2012

This paper aims to understand the potential of using wheat straw (WS) as a source for composite. High quality fiber bundles are obtained from wheat straw using a simple alkaline treatment method. Wheat straw fibers (WSFs) are used with PLA fibers to make composites. The effect of sodium hydroxide concentration and temperature of the treatment processes for wheat straw fibers on the tensile and flexural properties of the PLA/WSF composites has been investigated. The contact angle of WSF has also been studied. It shows that the the mechanical properties of PLA/WSF composites are optimal when the sodium hydroxide concentration is 2.5% and the alkali treatment temperature is 125°C. The contact angles after alkali treatment decrease signiﬁcantly, indicating that the surface wettability of the treated wheat straw is improved.
Characterization of an Autoclaved Aerated Concrete Building with Respect to a Similar Unreinforced Masonry Structure
Authors: Cancellara Donato , de Angelis Fabio , Pasquino Vittorio
Published: February 2012

In the present work some characteristical features of autoclaved aerated concrete structures are illustrated in the seismic and nonseismic design for residential and industrial buildings. Besides the properties of this material with regards to fire resistance and thermal and acoustical insulation, the use of autoclaved aerated concrete for engineering structures may have the advantage of a confined structure with reinforced concrete bond elements that are disposed horizontally and vertically. In the present work the dynamical behavior of a building prototype realized with autoclaved aerated concrete is analyzed, a finite element modelling of the structure has been calibrated according to an experimental modal analysis carried by loading the structure with a vibrodyne located on top of the building and by monitoring the building outputs due to horizontal harmonic forces. The finite element modelling of the dynamical behavior of the autoclaved aerated concrete structure has been compared with a similar tuff masonry building whose characteristical behavior has already been the object of experimental and numerical analysis in a previous work.
Crystallization Behavior of Mg60Ni23.6La16.4 Metallic Glass
Authors: Zhuang Wei , Du Yu Lei
Published: February 2012

Mg60Ni23.6La16.4 amorphous ribbon was prepared by melting-spinning method and the crystallization behavior was investigated by differential scanning calorimetry (DSC). The Mg60Ni23.6La16.4 crystallization process exhibits two stages of crystallization and shows an obviously kinetic nature. Isothermal DSC curves indicate that the crystallization is a nucleation-and-growth procedure. The activation energy analysis based on Kissinger Method shows that the growth process for the first crystallization procedure is more difficult than that for the second one. Calculation based on the Johnson-Mehl-Avrami (JMA) model shows that the primary crystallization starts from small crystalline grains with an increasing nucleation rate.
Role of Interface of Epoxy/Clay Nanocomposites and its Effect on Structure-Property Relationship
Authors: Zaman Izzuddin , Meng Qing Shi , Ma Jun
Published: February 2012

It is well known that the interface between the particle and matrix of the composite was significantly important as it could control the load transfer between the matrix and filler of composite. Despite of, in the polymer nanocomposites, the role of interface is still fragmented and less examined. In this paper, two different designs of interface modification were developed; molecular entanglement and chemical reaction using three variants surfactants such as ethanolamine, Jeffamine M2070 and Jeffamine XTJ502, with further investigation of structure-property relationship of epoxy/clay nanocomposites. The nanocomposites were prepared via solution mixing by reinforced 1.0–4.0 wt% of treated-clay. The interface properties were then characterized by XRD, FTIR, tensile test and fracture toughness. Results showed that for the epoxy/clay synthesized by reactive surfactant demonstrated higher stiffness and enhanced fracture toughness.
A Multi-Degree-of-Freedom System Modal Parameters Wavelet Transform Identification Method
Authors: Zhao Jian , Yu Ming , Yu Xin Ke , Zhang Ling Li , Yan Xian Guo
Published: February 2012

It is precondition for realizing the mechanical dynamic optimization design and the dynamic modification to analyze the characteristic of multi-degree-of-freedom system. The paper discusses a kind of modal parameters wavelet transform identification method based on Modified Particle Swarm Optimization (PSO) algorithm, furthermore, proposes the PSO wavelet ridge extraction algorithm, and gives the formulas identifying modal parameters from a wavelet ridge. The proposed method applies to the dynamic characteristic identification of a flow meter to explore the effectiveness. The results prove the method is precision and insensitive to noise.
Research on the Recognition Technology of Letter String on Label
Authors: Xie Yu Chan , Jin Wei
Published: February 2012

A letters recognition method based on a small area of the feature matching is proposed, in which the unqualified letter in the string were recognized based on its geometric feature. In this method, firstly confirm label’s position by the extracted straight line characters. Then, rotate and zoom image according to the prior knowledge of label. Acquire the position of the string on the label and cut them out. And then single letters are segmented out using the projection method in the area of the string. Finally, compare geometrical characteristics of the extracted letters with its template to recognize and eliminate unqualified labels. The matching process proceeded only in the small region with letters and there is no need to search the irrelevant information. For this algorithm, so much time has been saved compared with traditional letter recognition method and projection method which is used for single character segmentation is very quick also. Theory analysis and experiment showed that the method can segment unqualified characters robustly and quickly.
Preparation and Chemical Structure of RIC of PP/ Modified PA66 In Situ Microfibrillar Composite
Authors: Cheng Ling He , Wang Wan Jie , Cao Yan Xia , Li Gui Xun , Wang Jing Wu
Published: February 2012

Reactive interface combination agent (RIC) was synthesized by using reaction mixture technique starting from polypropylene（PP）, ethylene-propylene or butadiene-styrene elastomer, epoxy compound and monomer-assisted in the presence of a free radical initiator. The chemical structure of the RICs and the effects of change in the ratio of raw material during its preparation on constitute and structure was investigated using fractional extraction and infrared spectroscopy. The prepared RICs consisted of unreacted PP and/or elastomers, homo-and/or copolymerization of monomer, and graft copolymer of PP and elastomers, and crosslinked copolymer of PP and/or elastomers in conjunction with polymer bridge chains derived from monomer.
Nonlinear Absorption Properties of Spherical Gold Colloidal Nanoparticles
Authors: Zheng Chan , Ye Xiao Yun , Xiao Xue Qing
Published: February 2012

Spherical gold colloidal nanoparticles were prepared used traditional liquid phase method and the corresponding nonlinear absorption properties were investigated by open aperture Z-scan technique using 8 ns laser pulses of 532 nm. The gold colloidal nanoparticles exhibited a transform from saturable absorption (SA) to reverse saturable absorption (RSA) at relatively higher irradiation intensities. The SA behavior presumably owes to the bleach of ground-state surface plasmon resonance (SPR) absorption, while the RSA might result from high excited-stated free carrier absorption.
Reducing Thermal Conductivity of Polymer Derived SiC Ceramics via Microwave Sintering Processing
Authors: Han Xiao Yi , Xing Xin , Cheng Hai Feng , Wang Jun
Published: February 2012

Generally, high thermal conductivity of SiC ceramics is required. However, in some circumstances, low thermal conductivity SiC is also needed, for example, for good thermoelectricity or heat insulation. In this work, the product of pyrolysis of polycarbosilane (PCS) is chosen as raw materials. The microwave sintering process was applied to obtain low thermal conductivity at a relatively low sintering temperature. The microwave sintering processes were performed at 1200 °C under Ar atmosphere with dwelling time of 10, 20 and 30 min. The morphology and phases were analyzed by electric microscopy and X-ray diffraction (XRD), respectively. The thermal diffusivities, specific heat and thermal conductivities were measured by laser-flashed method using a thermal analyzer. The thermal conductivity of samples is within the range from 0.81 to 1.37 W/m•K. The sample with dwelling time of 30 min shows potential for multiple applications, due to its good crystallization in XRD spectra and relatively low thermal conductivity in the considered temperature range. The results also suggest a phase transformation at a dwelling time near 20 min that may have occurred.
Synthesis of Au Nano-Particles Using Plasma Sputtering into Oil
Authors: Zhang Hui Jun , Cheng Jing Liang , Zen Wen , Wang Guo Min , Murao Masaru , Wen Dian Zhong , Hatta Akimitsu
Published: February 2012

It has been examined to disperse the Au nano-particles directly into liquid by replacing the solid substrate with low-vapor oil in a plasma sputtering apparatus. The dispersing particles in oil are much smaller than the conventional methods. Under low density of particles on oil, the intense absorbance peak is detected around 325nm and the shape and peak of absorption spectra don’t almost change following time, and the size of Au particles is steady. With higher density, the absorbance peak is stronger and shifts to visible light about 20nm. With prolonging measuring time, absorption peaks fall and a new absorption locating on around 550nm gradually appears, large numbers of particles gradually convert and produce the new particles sizes around 3-5nm. under high density, the other intense absorbance peak exists around 540nm besides the peak of 350 nm. High particles density produces the particles sizes around 5-7nm, and the contents and sizes of particles are basic invariablenes against measured period.
Simulation of Ring Blank Drawing by Finite Element Method
Authors: Igarashi Tatsuki , Ito Yukihiro , Natsu Wataru , Kuwabara Toshihiko
Published: February 2012

Ring-shaped oil seals used in automobiles are usually manufactured by the press drawing and the press blanking considering the shape and the use application. In this process of manufacturing, the material availability is quite low because the central region part is cut from the product and becomes the waste material. We propose the forming method by the press drawing using a ring-shaped blank for the metallic part of the oil seal in order to improve the material availability and reduce the number of processes. In this research, the forming accuracy using the ring-shaped blank was investigated by the forming simulation. As the result, when the knockout was fixed in order to generate the sufficient bottoming by the punch, it was found that the bottom part can be formed flatly and the angle part can be formed almost right. Furthermore, it was found that the inside diameter of the formed product is proportional to the inside diameter of the blank except the case when the bottom part of the formed product is small. Hence, the required inside diameter of the ring-shaped blank can be calculated with the proportional relationship.
Research on the Effects of Product Reliability Caused by Coupled Design
Authors: Wang Wei Xing , He Cheng Ming , Du Hai Dong
Published: February 2012

Through introducing the design axioms in axiomatic design, the thesis elaborated the relationship between axiomatic design and reliability design of product, then analyzed the effects of product reliability caused by coupled design, and explained the necessity that avoided coupled design and the significance that kept the product function independent during product design.
Test of Physical Mechanical Properties of Gingko，Hickory Nut and their Stalks
Authors: Xu Xiao Feng , Yao Wen Bin , Xu Jiu Hua , Zhang Wei
Published: February 2012

In order to get the physical mechanics of gingko，hickory nut and their stalks, microprocessor controlled electronic universal testing machine (WDW-5E) was used to study the basic physical characteristics，pulling resistance and cutting resistance of their stalk in different harvest time and moisture contents. The impact of physical mechanics of cones and stalks on the picking process were analyzed and some concrete suggestions were put forward in the paper. This experimental study provides an important theory basis on designing and manufacturing different cones picking machine.
Virtual Piezoelectric Vibration Absorber with LR Parallel Shunt Circuit
Authors: Li Ning
Published: February 2012

A virtual piezoelectric vibration absorber with LR Parallel shunt circuit was developed to emulate the effect of a physical piezoelectric shunt damper. A controller was designed and the feedback structure according to the LR parallel shunt circuit was suggested by using the governing equations of piezoelectric shunt damping system. The inductor L and resistor R only “exist” as numerical representations inside the controller. The virtual piezoelectric vibration absorber can both eliminate the need for large inductor and tune circuit component parameters online to adapt to environmental changes. Therefore the two disadvantages of the physical piezoelectric shunt damper are overcome. The simulation results for a cantilever beam show the effectiveness of the Virtual piezoelectric vibration absorber for vibration suppression.
Optimization and Control Researches into the Cooling System of Pneumatic Disc Brake
Authors: Duan Zheng Yong , Peng Yong , Wu Heng
Published: February 2012

Some problems involved in the cooling and control system of a pneumatic disc brake are presented in this paper. The selection foundation of the friction torque is deduced when do strength check and thermal analysis to the brake. The heat transfer conditions when the brake safely works on the worst braking condition is investigated also; to propose that the coefficient of rib of the friction plate be more than 3.6. In addition, the control system of the brake is discussed. In terms of the design of the brake, for the cooling and control system, the parameters including the angular speed and torque of the shaft of the drawworks, the temperatures of the coolant at the inlet and the outlet, the pressure of the compressed air need to be monitored or controlled.
The Design Based on the Hydraulic Control of the Mango Picking Machine
Authors: Lian Xiang Wei , Liang Dong , Zhang Yan
Published: February 2012

According to the technical requirements of mango picking, a set of mango picking machine devices is designed. The device applied hydraulic system, controlling transmitting movement and performing related actions. The analysis shows that the system flexible, precise positioning is indeed able to complete the required action. And it also solutes some shortage like picking difficult, a waste of time and strength during the large acreage mango harvest in Hainan and overcome the labor-intensive manual picking and the defect of low efficiency, the effect promotes the mango industry in Hainan and commercial development.
Experimental Research on Non-Magnetic Steel 30Mn27Al4V
Authors: Li Chang Sheng , Xu Xin Fang , Ma Biao , Yao Chang Gui , Wang Min
Published: February 2012

Non-magnetic steels are required in energy and transportation fields such as superconducting energy storage equipment, magnetic liquid power generation equipment, superconducting generators, superconducting power transmission and ship electromagnetic propulsion. Experimental research on steel making, hot rolling, solution and aging for non-magnetic steel 30Mn27Al4V was carried out in the laboratory. The microstructure evolution was observed and the mechanical property and relative magnetic permeability were tested after heat treatment. The effects of fine particles such as VC, VN and V(CN) dispersively distributed in austenite matrix on precipitation, grain refinement and austenitic nucleation were analyzed. The microstructure of the tested steel is austenite. The grain size is 24~28μm. At room temperature, the yield strength and tension strength are 556 MPa and 701 MPa, elongation after fracture of the steel is 47%, the yield ratio is 0.79, strength and ductility product is 32.9 GPa%. After solution and aging treatment, the steel shows a yield strength of 325~371 MPa, tension strength of 550~645 MPa, elongation of 58~78 %, a yield ratio of 0.54~0.60, strength and ductility product of 36.3~46.3 GPa%. The relative magnetic permeability is below 1.005. The results indicate that the tested steel exhibits good mechanical property and non-magnetism. It has no elements of Ni and Cr, so it just needs simple process flow and lower production cost. The numerous applications of the steel in industry can create great economic benefits.
Dynamic Behavior for an SIRS Model with Nonlinear Incidence Rate
Authors: Li Jun Hong , Cui Ning , Sun Hong Kai
Published: February 2012

An SIRS epidemic model with nonlinear incidence rate is studied. It is assumed that susceptible and infectious individuals have constant immigration rates. By means of Dulac function and Poincare-Bendixson Theorem, we proved the global asymptotical stable results of the disease-free equilibrium. It is then obtained the model undergoes Hopf bifurcation and existence of one limit cycle. Some numerical simulations are given to illustrate the analytical results.
Study on Dynamic Performance of Tower Crane Based on ADAMS Multi-Flexible-Body
Authors: Zhao Chun Hua , Chen Shi Jun , Zhang Jin , Zhong Xian You , Yan Nu
Published: February 2012

When working, tower crane is affected by natural environment and is subjected to complex various loads. So it is not very easy to analyze its dynamic performance at system level. Some researchers have done some work as to simulation and analysis of tower crane, in order to study its dynamic performance. While much of their work based on grid body model but not flexible body model. This paper used SolidWorks and ADAMS to build the virtual prototype of a tower crane based on ADAMS flexible body. After the co-simulation, which joined ADAMS with SolidWorks, force of the connection between tower crane base and the strengthened section of the crane was recorded and analyzed. And so was the acceleration of the tower crane’s lifting rig. Succeeding in the application of Virtual Prototyping Technology based on ADAMS flexible body, this study can be used to direct the work, operation and fault diagnosis of tower crane, and lay a basis for further studies.
Coupled Vibration Analysis of Water Turbine Generator Unit and Hydropower Station House
Authors: Zhang Zhen Guo , Ji Guang Hong
Published: February 2012

The dynamic characteristics of shaft system in water turbine generating set and hydropower house structure is investigated by using the APDL procedure in ANSYS. The coupled vibration model which contains unit piers, hydropower house structure and water turbine generating set is developed. In this model, the nonlinear dynamic characteristics of the supporting structure (radial bearing) in water turbine generating set and the flexibility of unit piers and hydropower house structure are all considered. Through the revolving periodic transient results of the former four generating sets, the dynamic response of the shaft system in water turbine generating set and the dynamic characteristics of the hydropower house structure are analyzed. The interaction between the hydropower house structure and the water turbine generating set is discussed, which provide useful references to anti-vibration design of the hydropower house structure.
Development & Study of Cooperative Design Platform
Authors: Xiang Hao , Li Ming
Published: February 2012

The system structure and the system frame of cooperative design are established in this paper. The develop strategies combined prototype method and object-oriented are pointed out. By integrated existing software products and Secondary Development, the cooperative design platform are established.
Study on Driving Deceleration Model on Horizontal Curve Sections of Mountain Highways
Authors: Men Yu Zhuo , Yu Hai Bo , Wang Hua , Xu Liang
Published: February 2012

Mountain highways are traffic accident-prone locations. Such factors as vehicle speed and trajectory hold a considerable proportion in the accidents. Highway line features is the basis to determine vehicle speed. In this paper, the running speed of vehicles on mountain highways is taken as the main object of study and the observation and survey data on vehicles deceleration behaviors before they enter a curve on the curved sections of mountain highways are taken as the reference object to establish the drivers driving speed control model on the horizontal curve sections of mountain highways, and an example is used to conduct comparative validation on the driving deceleration model. Calculation results show that the deceleration control model established in this paper is feasible and effective, can better simulate vehicles deceleration behaviors when they pass through speed limit signs or the sections with road surface deceleration signs and provides a new theoretical method and guiding basis for the line features design, traffic safety analysis and evaluation and traffic safety improvements of mountain highways.
The Inspiration of Traditional Chinese Created Conception on the Eco-Design of Modern Architecture
Authors: Xi Tian Lu , Chen Yan , Tang Jian
Published: February 2012

In today's world, the core of sustainable development is considered to be 3R, which is REDUCE, RECYCLE and REUSE. The implementation of the principle of sustainability is exactly the same with the ancient Chinese created conception and design. This thesis provides Chinese modern sustainable design with a feasible principle and method from traditional Chinese ecological concept of creation, and is a constructive inspiration to the modern architectural design. It encouraged the life of mankind to develop towards a scientific, civilized and healthy way, achieved the aesthetic concept of architectural design based on the harmonious coexistence of human and nature, and prevent modern architectural design from being over materialized as well as the further deterioration of the natural ecological environment.
The Relationship between near Infrared Spectroscopy and Surface Color of Eight Rosewoods
Authors: Yang Zhong , Lv Bin , Fu Yue Jin
Published: February 2012

Rosewood is a kind of precious wood. Accurate wood species identification is a time consuming task for highly trained human experts. The development of cost effective techniques for automatic wood identification is a desirable goal. Wood color is one of the crucial factors to identify wood species. The color parameters (CIE L*, a* and b*) of eight rosewoods and the relationship between near infrared spectroscopy (NIR) and the color parameters were investigated in this paper. The results showed there was significant correlation between near infrared spectroscopy and color parameters. The correlation coefficients between laboratory-measured and NIR-predicted L*, a* and b* values were 0.93~0.99. The results will be helpful to develop a new method of rosewood identification through near infrared spectroscopy coupled with multivariate data analysis.
Research for Fish Motion Model
Authors: Cheng Shu Hong , Hu Chun Hai , Zhang Wei Tao
Published: February 2012

The fish motion essentially reflects the state of water quality, so it is necessary to study the methods of obtaining the real-time dynamic motion characters of fish body in the field of biological monitoring of water quality. From the point of view of the video, to extract the fish skeleton and to establish the motion model. Based on analysis of the motion model, it is easy to acquire some parameters, i. e. , fish swimming velocity and corner, tail dimensionality and so on. The experimental results show that our model can describe fish swimming, which lie a theory foundation for the fish to participate in the environment pollution research.
The Properties of Textured GZO Film at Different Substrate Temperature
Authors: Zeng Li Xin , Yang Hui Dong , Huang Bo , Zhang Ji Sen
Published: February 2012

The Ga-doped ZnO (GZO) films were prepared by DC magnetron sputtering at different substrate temperature, followed by etching in 0.5%HCL solution for 15s to obtain textured surface. Optical and electrical properties, structural and surface morphology of thin films were investigated. The results indicated that the transmittance rate decreased and the C-axis preferred orientation of films enhanced with the increase of the substrate temperature. When temperature increased from room time (RT) to 200°C, the resistivity decreased and the quality crystal became better, while substrate temperature above 250°C, the resistivity increased,the deterioration of crystallinity emerged. For the textured film deposited at 200°C, it obtained the minimum resistivity of 0.84×10-3/(Ω•cm) and had a good light trapping ability.
Preshaving Hob CAD and the Software Development
Authors: Chou Xing Rong , Wang Rui Fang
Published: February 2012

In order to improve the preshaving hob design quality and efficiency, development of the CAD software that Engineering calculation and working drawing are integrated. Introduced the software’s design of overall structure and main function of modules, elaborated the determination of the optimal design’s variables, objective function and constraint and the choice of optimal method of the preshaving hob’s antenna and chamfering section. The software has been successfully used in medium and large machinery manufacturing enterprises, improved the preshaving hob’s design speed and design quality, and reduced the labor intensity of the designer.
Concept and Framework of Reconfigurable Intelligent Optimization Algorithm
Authors: Liu Y , Zhang Y , Zhao D , Tao Fei , Zhang L
Published: February 2012

Based on the analysis of the current research status of intelligent optimization algorithms, a concept of reconfigurable intelligent optimization is proposed according to the demands of different users and developing trends. A framework of software system platform for realizing the reconfigurable intelligent optimization is proposed, and a case study is given out to illustrate its application.
Design of Power Fault Recorder Based on Embedded Systems
Authors: Zhou Tian Pei
Published: February 2012

The hardware and software design of power fault recorder based on the embedded systems was introduced .The system adopted modularization design and double CPU work with each other. In order to improve the precision and speed of fault recording, The DSP chip TMS320C33 was used to diagnose the power system and record the parameter of power system when an inaccuracy or an abnormity occurred, which satisfied the requirement of high accuracy of the data. S3C44B0X as the main control processor was adopted, the embedded operate system uClinux was transplanted, which make easier to display, transfer and storage of important information, and it was useful to communicate with operators. Compared with the power fault recorder based on traditional MCU, the system had several advantages, such as higher accuracy of data acquisition, higher solution speed, bigger system capacity, and so on. If the system combines with better fault detection algorithm and data compression algorithm, its performance was improved to a great extent.
An Efficient Hybrid Based on HS and GA Solving Blocking Flow Shop Scheduling Problems
Authors: Bao Yun , Zheng Liping , Jiang Hua
Published: February 2012

This paper presents an efficient hybrid algorithms (EHA) based on harmony search (HS) algorithms and genetic algorithm (GA) for solving blocking flow shop scheduling problem. An improved GA is used to get better results. The computational result shows that EHA is not only better than GA , but also better than HS algorithm.
Study on MAS-Based Fault Diagnosis System for GJW111 Excavator
Authors: Tang Xiao Yan , Cui Yu Juan , Zhou Min , Li Jian Xin
Published: February 2012

In the light of the structure and function properties of the GJW111 excavator, We propose the overall design and the framework system of fault diagnosis based on Multi-Agent System (MAS), express the process of fault diagnosis and introduce the components of the system. The system supports plug and play, which can improve its scalability.
Denoising and Enhancement of Magnetic Resonance Image Based on the Dyadic Wavelet Analysis
Authors: Huang Zheng Hoang , Xia Li
Published: February 2012

This paper is applied non-linear operators for image enhancing. The efficient algorithm of MRI enhancement is provided by decomposition of localized information at different spatial frequencies. So the MRI edge textures was enhanced while suppresses the noise maximally. Experiment was show more obvious unseen or barely seen features, and the visual effect is improved after the method, and help for diagnosing the state of an illness.
Study on Wind Load Performance for L Type Aerial Work Suspended Platform
Authors: Yu Hui Ye , Zhao Liang , Zhang Ke , Wu Yu Hou
Published: February 2012

Based on the wind load calculation model increases Suspended Platform vibration characteristics of wind vibration coefficient, and gets Suspended Platform natural vibration period and inherent frequency by ANSYS finite element modal analysis, then determines the wind vibration coefficient, calculates the wind load of Suspended Platform in working state and non-working state. Aiming at three different conditions, analyzes the platform structure in the wind load the stress intensity and deformation. Through analysis to finds the most dangerous positions of Suspended Platform in three different conditions, provides effective references for the L Type Suspended Platform in wind-resistant design and optimization design.
Structure Optimization and Strength Analysis of CBM Special Anti-Clogging Drainage Pump
Authors: Qu Wen Tao , Guo Yi Xiao , Ren Tao , Sun Yan Ping
Published: February 2012

There are abundant coal bed methane resources in China, and recovery technology is considered a very important part in the development of coal bed methane. At present, coal bed methane production areas are still adopting the tubing liner pump, but because of the special working environment, in the pumping process, the fine breeze (sand) and other solid particles entering into the pump barrel is likely to cause the pump stuck, pipe string buried by sand and other issues. In view of the above problems, based on the ordinary tubing liner pump, through the increase of the anti-litter bypass style traveling valve housing and fixed valve housing, outside liner jacket, sand reservoir and liquid in tee joint measures we developed a new type of CBM special anti-clogging drainage pump and adopted finite element analysis software ANSYS to complete key parts of strength calculation. The use of this pump will effectively reduces the blocking of fine coal particles (sand) and other solid particles, decreases the pump's checking operation and workload of sand bailing, consequently improves efficiency, reduces overall operating costs.
Equivalent Stress Linearization Method Based on Assessment Line of Nozzle-Cylinder Intersection
Authors: Dong Jun Hua , Tang Hui Yong , Gao Bing Jun
Published: February 2012

The limit internal pressures of the nozzle-cylinder intersection with different dimension are calculated by nonliner FEM and are used to determine stresses of this structure in elastic analysis.The elastic nominal stresses linearized by stress-along-a-line method are classified at the danger location and the limits of kinds of nominal stress intensities are taken as the stress assess criteria of the nozzle-cylinder intersection. The results show that, in the range of parameters for calculation, the primary local membrane stress intensity SII is less than or equal to 2.0 times design stress intensity Sm,and the primary membrane plus primary bening stress intensity is not more than 2.1 times Sm.
Durability Fatigue Behavior and Vibration Modal Parameter Frequency Sweep for China-Made Car Rear Axle
Authors: Men Yu Zhuo , Yu Hai Bo , Huo Na
Published: February 2012

In order to research the fatigue fracture problem of the rear axle of a China-made car at the reliability test stage on the durable enhancement roads of proving ground, and the strain loading spectrum of the rear axle fracture location and the weak points of the finite element analysis was measured. The fatigue damage of the broken crack at the rear axle on the durable enhancement roads was calculated and contrasted detailedly. At the same time，a six-channel MTS coupling system is used to conduct the vibration mode frequency sweep to the rear axle and car body of test car and the benchmarking car，and through vibration frequency sweep，an analysis of the reason of differences between the two cars and its relationship with the car body vibration frequency is made. The enhancement test and frequency sweep results show that the fatigue damage of two vehicles focuses mainly on the washboard road，the impact of the speed on the fatigue damage of the test car fluctuates significantly, the damages of the two cars vary greatly when the forced vibration excitation frequency of the washboard road is greater than 20Hz and the vibration modal frequency of the rear axle is close to the excitation frequency of the washboard road, causing high stress distribution and then fatigue fracture to the rear axle of the test car. The test results have provided an important basis for the structural improvement of the broken rear axle and the enhancement in the fatigue strength of the rear axle.
Analysis on the Green Concept in Clothing Design
Authors: Chen Shu Cong , Wu Yong Wei
Published: February 2012

Abstract. In the twenty-first Century," sustainable development" as a slogan has been putting forward resonantly. Today, for our own survival and development, the design community has brought forward the slogan "green design". It means: resource conservation and environmental protection are the main idea and method, protection natural ecology, making full advantage of resources, people-oriented, environment friendly. Green design is the inevitable trend of clothing design. This paper discusses the green clothing design strategies from the green eco-friendly materials, how to rationalize clothing design.
Research on Mechanism and Model of Cutting Chatter Based on the Cutting Parameters
Authors: Li Jin Hua , Liu Yong Xian , Xie Hua Long , Wang Wei , Feng Bao Zhong
Published: February 2012

According to the kinematics and dynamic theory, the regenerative cutting chatter is derived on the math and simplified within the probable range. The correlation is gained between the cutting depth limit and the spindle speed about the regenerative chatter. In Matlab, the mathematical modal is simulated based on the modal parameters, cutting parameters and cutting-force coefficients. The stability lobes are drawn in the diagram, the stability zone lies under the curve and avoid the occurrence of cutting chatter.
The New Exploration of the Green Design of Industrial Products
Authors: Wan Fen Fen
Published: February 2012

With the rapid development of industrialization in the world, people’s living environment is continuously deteriorating. The green design of industrial products is gaining in popularity with the industry and consumers . In this paper, there is a deeper exploration of the question on how to achieve sustainable development of Green Design through green technique, ecological symbols, the design of innovation , government action,ect.
A Statistical Experimental Design to Degradation of Aqueous Methyl Orange Solution with Photocatalyst of Ti-TiO2 Nanotube Array
Authors: Xu Ying Cao , You Hong
Published: February 2012

A statistical experimental design to the degradation of aqueous methyl orange, by using the Ti/TiO2 nanotube array photocatalyst, under UV irradiation, was investigated. Concentration of methyl orange(5mg/L,15mg/L,25mg/L), catalytic time (0.5h,1h,1.5h) and UV light source (6w,11w,15w) were selected as major operating variables. To investigate the effects of variables to degradation rate, the statistical experiment of Box-Behnken design(BBD) and Response Surface methodology(RSM) was employed. Regression analysis showed that the experiment data accorded with the predicted values obtained from quadratic regression equation in BBD with R-Squared of 0.9806 and F-value of 39.34.