bluuebunny/crossref_metadata_2025 huggingface dataset:
Research on the Preparation of Low Water Zinc Borate
Authors: Chen Ze Min , Jiao Xue Chao , Xu Jian Zhong , Che Li Guang
Published: August 2013

Zinc Borate with low water is one of excellent inorganic flame retardant additives. Among Zinc Borate, ZB-2335 (2ZnO·3B2O3·3.5H2O) is widely used. The paper selects borax and Zinc sulfate as raw materials. Through orthogonal experiment and the single factor analysis experiment, the optimum technological conditions are determined: temperature is 338K, ZnSO4·7H2O and Na2B2O7·10H2O mixture ratio is 1:1.26, liquid and solid ratio is 6.5:1, reaction time is 6h. The product prepared under these conditions is in good agreement with theoretical value.
The Fabrication of Self-Assembled Film on Steel Surface
Authors: Chen Ze Min , Jiao Xue Chao , Zhou Xuan , Wang Su Hong
Published: August 2013

Fabrication of self-assembled film used 792(silane coupling agent), citric acid, boric acid and triethanolamine as the main materials. Through orthogonal experiment and the single factor analysis experiment, the optimum technological conditions are 792 10mL·L-1, citric acid 24g·L-1, boric acid 8g·L-1, triethanolamine 7.5mL·L-1, temperature 20~21°C, time 10min. Simulated sea water (3% Sodium chloride) is applied to measure the effects of the film. The results show that the processing is simple, tank liquor is stable, and film is uniform, dense and colorless.
ATRP Synthesis of PS-b-PtBMA and Preparation of Porous Film
Authors: Yan Chang Hao , Zhang Zhi Jiao , Chen Hai Yan , Xie Zhong Yi , Zhu Ting , Zhang Ming
Published: August 2013

The polystyrene with end group of Br was synthesized by using MBrP as the initiator, CuBr/ PMDETA as the catalyst system according to atom transfer radical polymerization (ATRP). The effect of reaction temperature was studied and the system was confirmed as the active polymerization. Then PS-Br and CuBr/ PMDETA were respectively used as macroinitiator and catalyst to polymerize tBMA according to atom transfer radical polymerization (ATRP). The structure of the product was characterized by GPCFTIR1H-NMR. The amphiphilic block copolymer was obtained after hydrolysis. And the honeycomb porous film was prepared by PS-b-PMAA through using breath figure method.
Effect of Modification of Aluminum Borate Whiskers with Three Methods on Flexural Properties of Dental Resin Composites
Authors: Yuan Yan Bo , Li Xing Xing , Zhang Wen Yun , Chen Qing Hua , Xiao Yu Hong , Yang Li Dou
Published: August 2013

This study aimed to compare three different methods for the modification of aluminium borate whiskers and investigate the effect of aluminium borate whiskers composites on flexural properties of dental resin composites. Method A was to mix aluminium borate whiskers and silicon dioxide (SiO2) nanoparticles directly. Method B was to modify the mixture of aluminium borate whiskers and SiO2nanoparticles with sol-gel process of tetraethoxysilane (TEOS). Method C was to modify the aluminium borate whiskers with SiO2nanoparticles which were repaired by sol-gel method of TEOS. The effects of the three methods were characterized by the TEM and SEM. There was a significant difference (p<0.05) in the flexural strength among three methods. Group C had a flexural strength of 149.59 ± 12.86 MPa (mean ± SD; n = 5), which is significantly higher than 95.28 ± 4.53 MPa for Group A and 123.14 ± 17.37 MPa for Group B. It is concluded that ceramic whisker reinforcement significantly improves the flexural properties of resin composites; different methods produce different effects.
Electrical Properties of Bi(In,Ga,Sc)O3-PbTiO3 Piezoelectric Ceramics
Authors: Chen Yi , Zhu Jian Guo , Xiao Ding Quan
Published: August 2013

The gallium and indium double-modified bismuth scandate-lead titanate (1-x)Bi (In0.20Ga0.05Sc0.75)O3-xPbTiO3((1-x)BIGS-xPT,x=0.55-0.70) ceramics were prepared by using conventional ceramic technique. (1-x)BIGS-xPT ceramics for nearx=0.60 exhibits an evident enhancement in room temperature dielectric and piezoelectric properties, with dielectric constantε, piezoelectric constantd33, planar electromechanical coupling coefficientkpand Curie temperatureTCof 1100, 295 pC/N, 0.43 and 435 °C, respectively. TheTCof (1-x)BIGS-xPT is in the range of 425-530 °C for the compositions investigated. The combination of highTCand excellent piezoelectric activity suggest that the (1-x)BIGS-xPT ceramics are usable candidate materials for high temperature piezoelectric devices applications.
New Type Homogenizing Valve: Flow Patterns Simulation
Authors: Liu Bin , Wu Xue , Wang Jing , Feng Tao
Published: August 2013

Homogenization is important in modern chemical, pharmaceutical and food industry. The design and optimization for homogenizing units are usually difficult because of lacking enough information about the flow field within the valve. Numerical investigations on flow and pressure fields within a kind of new type homogenizing valve have been conducted using computational fluid dynamics (CFD) software. The study indicates that the new type homogenizing valve can be modeled by CFD and detailed information on high speed flow is available. During the process on numerical simulation, finite-volume technique and RNG k-ε turbulence model are present. Through numerical results, mechanical stresses, high shear rates in small valve region and those phenomena that could not be easily determined experimentally can be reached.
Study on Evaluation Method of High-Speed Train Based on Bipartite Graph
Authors: Li Ling Xuan , Ma Yuan Yua , Liu Zi Liang
Published: August 2013

Based on the resource allocation method of bipartite graph projected to one-mode graph, the bipartite graph network is established using six evaluating comfortableness indices and seven subsystems of high-speed train as the vertices. Our research shows that: This method can be used to find out the key factors which have high influence on the high-speed trains comprehensive comfortableness; also its ratio can be obtained. The overall quality of the high-speed train also can be forecasted by this method if the seven subsystems performance indices are given. Meanwhile, the interacting dependency level among the indices can be obtained.
Cognitive Stratified Model on Misperception in Human-Computer Interaction
Authors: Wu Xiao Li
Published: August 2013

From the perspective of the corresponding relationship between cognition and error, we have established misperception model through Error-Cognition model stratification. The analysis reveals that cognitive stratified model are inherently related to these cognitive theories: Conceptually-Matching Theory, Schema Model, Perceptual Selected Model, Attentional Load Theory, etc. Finally, we can draw a conclusion that the study on internal mechanism of user error can improve user recognition, reduce cognitive difficulty and decrease error rates.
Compressive Strength of Porous Bone Cement/Polylactic Acid Composite Bone Scaffolds
Authors: Lou Ching Wen , Chen Wen Cheng , Lu Chao Tsang , Huang Cheng Chun , Lin Jia Horng
Published: August 2013

Calcium phosphate bone cement (CPC), a bioceramic, is commonly used in artificial bone scaffold for impaired bones. In this study, CPC is mixed with polylactide (PLA) fibers and porogenic agent to form CPC/PLA composite bone scaffold. The compressive strength of the resulting bone scaffolds is evaluated and the fractured cross-section is observed by a scanning electron microscope (SEM), thereby determining the influence of fiber length. The experimental results show that the shorter the fiber is, the greater the compressive strength is.
Effects of the Content of High Strength Polyethylene Terephthalate Fiber and Kevlar Fiber on Properties of Geotextiles
Authors: Hsing Wen Hao , Lou Ching Wen , Lin Ching Wen , Chen Jin Mao , Lin Jia Horng
Published: August 2013

Geotextiles have been commonly used globally, making the control of material selection to influence geotextiles properties an important research topic. This study aims to explore the effects of the ratio of high-strength polyethylene terephthalate (HPET) fiber to Kevlar fiber on hybrid geotextiles. At the first stage, HPET and polyethylene terephthalate (PET) fiber are combined to make HPET/PET hybrid geotextile and then tested for porosity and water permeability, determining the optimum HPET/PET ratio. At the second stage, with a content of 60 % PET fibers, HPET fibers and Kevlar fibers are mixed with various ratios to form Kevlar/HPET/PET hybrid geotextiles. The experimental results show that with an increase in the content of HPET fibers, the porosity and water permeability of the Kevlar/HPET/PET hybrid geotextile decrease.
An Integrated Manufacturing Process of CFRP Parts Based on RFI and Cutting Process
Authors: Guo Yu Qin , Meng Zhao , Li Fu Zhu , Chen Wei , Guo Juan
Published: August 2013

Due to the prominent mechanical and physical properties, CFRPs have a broad application prospects in many domains. Aiming to the problems faced by available machining processes of CFRPs, this work proposed an integrated manufacturing process of CFRP parts by combining RFI process with cutting process, which replaced machining processes of the difficult-to-machine CFRPs with cutting of the flexible carbon fiber fabrics infiltrated by melted resin matrix. And it carried out molding, cutting and curing in a press stroke by a multi-functional die whose structure is given in this paper. Furthermore, by comparing the cross-section quality of CFRP parts obtained from the proposed integrated manufacturing process with that of drilling, mechanical machining and laser cutting, the integrated manufacturing process is verified to be feasible, cost-effective and capable of avoiding subsequent machining processes of difficult-to-machine CFRPs.
Phase Transformation of MgAlON-SiAlON Powders Synthesized by Carbothermal Reduction-Nitridation from Ludwigite Tailings
Authors: Jiang Tao , Zhang Lu , Tang Yi , Xia Yi , Xue Xiang Xin
Published: August 2013

This paper focuses on the influence of temperature and holding time on synthesizing MgAlON-SiAlON powders applying CRN method. The results were analyzed by chemical and XRD analysis technology. The experimental results revealed that β-SiAlON, as an intermediate phase, appeared in the synthesized products at 1200°C. With the increase of synthesis temperature, β-SiAlON was translated into Mg-SiAlON polytypoid (Mg1.25Si1.25Al2.5O3N3) and reached the maximum at 1450°C. Increasing synthesis temperature was beneficial to generate MgAlON, and the optimal condition of temperature for powders synthesis was 1500°C. β-SiAlON disappeared with the increase of holding time. MgAlON and Mg-SiAlON polytypoid became the main crystalline phases with a holding time of 4h. Whats more, the phase compositions had no evident change with longer holding time. Flaky MgAlON grains and elongated Mg-SiAlON grains were observed in synthesized powders.
Experimental Study on Indium Recovery from Discarded TFT-LCD Panels
Authors: Wang Yu Lin , Chen Fang Qiu , Zhao Kai , Hu Hai Juan , Liu Guang Fu
Published: August 2013

With the rapid development of the technology of liquid crystal display, LCDs have become the main stream displays. However, if there are no appropriate ways to recycle the discarded LCDs, the environment will be polluted and the resources will be wasted. TFT-LCD panels mainly consist of the color filter (CF) substrate and the thin film transistor (TFT) substrate which both have a surface covered with indium-tin oxide (ITO). ITO layer contains the metal of indium which is rare, precious and of high value. In view of the difference of the structure and material of the CF substrate and TFT substrate, an efficient and green process has been presented for recycling the indium by means of theoretical analysis and experimental verification. Under heating condition, the sodium hydroxide solution is used to dissolve the color filter of the CF substrate and the ITO layer attached to the color filter can be eliminated quickly and the metal indium can be enriched by filtering solution. By grinding the ITO layer on the TFT substrate with the aid of water-proof sand paper and collecting ITO scraps, indium can also be enriched quickly. The experiments show that the indium content of the CF substrate and TFT substrate are both quite low. Enriching indium on the premise of not dissolving indium is beneficial to the concentrated recovery of indium and is helpful to raise the recycling efficiency and protect the environment.
Impact-Resistant Polypropylene/Short Glass Fiber Composites with Far-Infrared Emission: Manufacturing Technique and Property Evaluation
Authors: Lin Jia Horng , Lin Zheng Yan , Chen Jin Mao , Huang Chen Hung , Lou Ching Wen
Published: August 2013

This study produces the far-infrared emitting composites by using impact-resistant polypropylene, short glass fibers, and far-infrared masterbatches. The addition of short glass fiber and far-infrared masterbatches is then evaluated to determine their influence on the mechanical properties and far-infrared emissivity of the resulting composites. The experimental results show that with an increase in the content of short glass fibers, the tensile strength increases from 34 MPa to 56 MPa, the far-infrared emissivity increases from 0.85 to 0.93, but the impact strength decreases from 1037 J/m to 197 J/m, proving that the resulting composites have desired mechanical properties and far-infrared emission.
Predictive Modeling of Minimum Quantity Lubrication: Cutting Force, Temperature and Residual Stress
Authors: Ji Xia , Zhang Xue Ping , Li Bei Zhi , Liang Steven Y.
Published: August 2013

This paper presents an analytical approach to predict the machining force, temperature and residual stress under minimum quantity lubrication (MQL) condition. Both the lubrication and cooling effects are considered to change the tribological and thermal properties in the modified Oxleys model, which is capable to predict the cutting force and temperature in MQL machining directly from cutting conditions. The machining-induced residual stress is predicted by modified McDowell hybrid algorithm. The predicted cutting forces and residual stresses are verified by orthogonal cutting tests for C45 steel and TC4 alloy steel.
Structural Optimization Design of the Arc Finger Seal
Authors: Qi Fang , Su Hua
Published: August 2013

According to the working condition of the finger seal, a geometric model applied to optimization of finger seal with arc curve (arc finger seal) is established based on mathematical relationship analysis of the finger seal structural parameters. Two performances, the hysteresis and contact pressure between finger pad and rotors surface, are put forward as the objectives for the structure optimization of the finger seal. The optimization model of C/C composites arc finger seal is presented and the multi-objective optimization process is carried out based on ANSYS software. An optimization design example is given which shows that comprehensive performance of finger seal can be obviously improved through the structure optimization. The performance comparison between a C/C composites and a metal material arc finger seal with the same structural and working conditions proves that the choice of C/C composites as the finger seal material, to a certain extent, may improve the sealing performance effectively. It provides a new choice for the design of the finger seal.
Free Vibration Analysis of Carbon Nanotubes by Timoshenko Beam Model and Thin-Plate Spline Radial Basis Function
Authors: Wang Feng , Xu Li Na , Sui Shu Bo
Published: August 2013

Timoshenko beam model and the meshless method based on thin-plate spline radial basis function are used to analyze the free vibration of carbon nanotubes. The natural frequencies of the carbon nanotubes with different length-to-diameter ratios and boudary conditions are compared with the results of published literatures which demonstrate the high accuracy of present method.
The Characteristics of Titanium Alloy Chip-Breaking by Orthogonal Cutting with a Surface-Textured Cutting Tool
Authors: Zhang Jian Fu , Chen Zhi Meng , Feng Ping Fa , Xu Wan Hong
Published: August 2013

A comparative experimental study on the orthogonal cutting of titanium alloys by a polished tool, a tool containing a chip breaker groove, and a surface-textured tool was performed. The effects of different cutting tools on chip morphology, chip thickness, length and width of crack defects inside the chip, saw-teeth of the chip, and chip curl radius were analyzed during the cutting of a titanium alloy. Compared to chips formed by other tools, curled chip fragments formed by the surface-textured tool exhibited greater thickness and longer crack defect depths but smaller chip tooth pitches and curvature radii. The microstructural mechanisms involved in the interaction between the micro-texture surface cutting tool and the chips were analyzed by evaluating the cutting and texture parameters. The chip-breaking mechanism is that the micro-texture on the tool surface creates a sticky texture, leading to the micro-cutting and wrenching of chips, thereby increasing the magnitude of the tools work-hardening and chip-breaking effects.
Harmonious Design Method of Product and its Applications
Authors: Wen Bang Chun , Li Xiao Peng , Liu Shu Ying , Wang Wei Zhou , Wang Zong Yan
Published: August 2013

There are much more disharmonious problems in the process of product design because the environment factory of the product design could not be considered fully and systematically. For example, the disharmonious problems between the product design and natural environment or society environment and among internal elements of product design. The purpose of harmonious design is to make the harmony between product and external environments and among internal elements of products. In order to satisfy the requirement mentioned above in complete design tasks process the reasonable methods should be adopted and the relationship degree analysis and harmonious degree assessment should be done. After that the products can satisfy users and country requirement and have the excellent quality, higher performance-value ratio, the short manufacturing period, good environment protection, convenient service and so on. Due to these the enterprise will get greater market portion.
A Brief Historical Review of Western Approaches to Energy Design before Professionalism
Authors: Landler Juliet
Published: August 2013

For the last two decades most professional architectural and engineering associations have encouraged their members to embrace an integrated design approach to improve and minimize the energy flows through buildings, cities and the broader ecosystem. While the integrated design approach often is portrayed as relatively novel approach, the reality is that it is only since the rise of professionalism in the Western world that the building industry developed a disjointed approach to energy design in the built environment. Previously the professions of architecture and engineering were intertwined, and the architect-engineers of antiquity, the Renaissance and the Enlightenment still can serve as role models for how building industry professionals can take a unified approach to design even considering the complexities of modern building techniques. This paper attempts to provide a brief historical review of the integrated approach to energy design that many architect-engineers took before the industrial revolution.
Research on Knowledge-Based and Featured Mechanical Part Modeling
Authors: Zhu Wen Bo , Wu Xin Ren , Gan Yi , Chen Long
Published: August 2013

Knowledge-based Engineering (KBE) should be introduced into the field of mechanical part modeling. The knowledge-based and featured mechanical part modeling is proposed based on the two layers of knowledge base. Features and process planning rules for mechanical parts are integrated and explicit knowledge and tacit knowledge are involved in this model. Explicit knowledge includes basic information, shape feature, precision feature, material feature and assemble feature, and tacit knowledge includes process rule-based reasoning and process feasibility analysis. The model proposed will help to the following process planning and play a very important role to improve the success rate of design mechanical parts. Finally a case study is conducted.
Design and Application of a Secure Chip Key Issuing System
Authors: Zhao Bing , Zhai Feng , Cen Wei , Lv Ying Jie , Liang Xiao Bing
Published: August 2013

According to chip key’s security problem, this paper has designed a secure chip key issuing system and its application method. The chip key issuing system mainly include chip key issuing machine, key issuing host computer, key management server and cryptographic machine. Every key is protected to transmit and write into chip by conversational key which is agreed between chip key issuing machine and the cryptographic machine beside key management server when chip key is issuing. This chip key issuing system and method can provide effective guarantee to chip key’s security.
Tooth Profile Design for Translational Meshing Motor
Authors: Li Rui Hua
Published: August 2013

As the reason for large transmission ratio, small center distance and interference on translational motor body, the design method of involute gear for translational meshing motor was proposed. In order to get appropriate tooth profile parameters, the trail calculation considering the conditions of interference and coincidence degree were applied using the tooth profile parameters calculated from given module, number of teeth, pressure angle and modification coefficient. The internal meshing gears was designed and processed based on proposed method. The novel translational meshing motor using designed involute gears operates successfully and efficiently which testify the validity and feasibility of proposed method.
Numerical Modeling of Fire Dynamic Behavior for a Five-Story Building
Authors: Lin Cherng Shing , Chen Te Chi
Published: August 2013

This study is based on a real fire accident that occurred in Keelung City, Taiwan. The fire site was situated in an old five-story building that was renovated for recreational purposes. When the fire broke out, a stack effect formed instantly because the fire source was gasoline, the initial location of the fire was the stairway, and the fire burned rapidly with a cut-off downward evacuation exit. Customers were unfamiliar with the escape routes and fire-extinguishing equipment, leading to the loss of five lives. This study applies the Fire Dynamics Simulator (FDS) to develop a computer numerical model and simulate the actual conditions of the fire accident. The major fire dynamic behavior parameters are computed to evaluate the transport of flames, smoke particles, and toxic gases within the enclosed building. Recommendations for fire safety in this type of architectural structure are provided to reduce the reoccurrence of similar disasters.
A New Variant Harmony Search Algorithm for Unconstrained Numerical Optimization Problems
Authors: Xia Hong Gang , Wang Qing Zhou
Published: August 2013

Harmony search (HS) algorithm is a good meta-heuristic intelligent optimization method and it does depend on imitating the music improvisation process to generate a perfect state of harmony. However, intelligent optimization methods is easily trapped into local optimal, HS is no exception. In order to modify the optimization performance of HS, a new variant of harmony search algorithm is proposed in this paper. The variant integrate the position updating of the particle swarm optimization algorithm with pitch adjustment operation, and dynamically adjust the key parameter pitch adjusting rate (PAR) and bandwidth (BW). Several standard benchmarks are to be tested. The numerical results demonstrated the superiority of the proposed method to the HS and recently developed variants (IHS, and GHS).
The Dynamic Property Research of Ink System Based on Computer Simulation
Authors: Guo Mei Ni
Published: August 2013

The research target is offset press, using computer simulation to analysis ink press system and the dynamic transfer process of ink, including the calculation of computer ink press system and solving ink thickness changes of the substrates ink film, and then to evaluate the characteristics and quality of inking system, and to guide the selection or design of inking system according to the research.
The Analysis of Scrapping in Squeeze Casting Injection Device Based on FEM
Authors: Song Lei , Shao Ming , Huang Lin Yong
Published: August 2013

Injection device is one of key parts of Squeeze Casting Machine, and scrapping problem is the pivotal knot of leading to injection device’s malfunction and lifetime cutting of shot sleeve. This paper computes out the displacement values of shot sleeve and plunger tip in radius direction through FEM, and makes qualitative investigation on scrapping problem of injection device.
Numerical Investigation of Interaction between Flexible Hyper-Elastic Structure and Fluid by Immersed Boundary Method
Authors: Lv Jing , Ran Chun , Hao Dong Wei
Published: August 2013

Immersed boundary method is one of the important numerical methods for solving the interaction between flexible hyper elastic structure with large deformation and viscous fluid. Based on previous research results, hyper elastic finite elementmodeling of erythrocyte with film thickness was established. Study on the dynamic characteristics of erythrocyte under shear flow, linkage dynamic characteristics of erythrocyte, plasma and vessel wall by using the immersed boundary method. The research results agree with experimental observations and some other researcher's calculated values, Interpret the mechanism ofhemokinesis in portion micro vessels simultaneously, have a great value to clinical medicine and biomechanics research.
Design of Mechanically Driven Non-Sinusoidal Mold Oscillation
Authors: Yu Min Zhi , Li Xian Kui
Published: August 2013

Based on an superposition principle, a new type of mechanically driven non-sinusoidal oscillation device has been designed. It has been proved by production practice that the device has much more advantages of investment, operation, maintenance and reliability than hydraulic-servo driven system. Now the oscillation device has been used at CC slab caster at No.1 Steel-making Plant of Shougang Corp. and obvious effect has been obtained.
Analysis Methods of Mechanism Life from its Dynamic Performance
Authors: Ma Tian Yang , Li Shi Qi
Published: August 2013

With the dynamic mechanisms requirements on high performance and long Life, a Life-analysis method based on index of its dynamic performance is worked out. By setting a systematic model of mechanism with its parameters, synthesizing characteristic changes of key components as well as its adjustment ability to control the system, different conditions of the mechanisms Life have been worked out. Related tests proved its efficiency.
Co-Design Research on the Welding Structure of the Metro Bogie
Authors: Liu Zhi Ming , Hu Wei Gang , Chen Yue
Published: August 2013

In order to study the influence of welding process and local detail design to the life of the metro bogie frame, this paper, in view of the tee joint, researched the superposition of residual stress and external load influence on the structure strength by the finite element simulation to establish mechanical structure and welding process co-design method. Based on the above research, the fatigue strength of the overlapping structure of welding frame socket plate and beam was improved, by the co-design of the groove angle and joint-welding sequence.
Heat Sink Design for Thermoelectric Generation in Spindle Unit
Authors: Li Sheng , Zeng Qing Hui , Yao Xin Hua , Fu Jian Zhong
Published: August 2013

Thermoelectric energy harvesting is emerging as a promising alternative energy source to drive wireless sensors in mechanical, civil, and aerospace engineering systems. Typically, the waste heat from spindle units of machine tools creates obvious potential for thermoelectric generation. The structure of heat sinks on a thermoelectric generator has a great effect on the output voltage of the thermoelectric generator due to the temperature difference between hot and cold sides induced by heat transfer, so several typical structures of heat sinks are studied under different rotation speed of the spindle. According to the simulation study, the thermal resistance of heat sinks was presented. In the experiment, the output voltages of a thermoelectric generator were measured under different rotation speed with different structures of heat sinks. Experiment and simulation shows that the two pipes structure of the heat sink can help the generator to produce more power.
Dynamic Analysis of High-Speed Hybrid Thrust Bearings
Authors: Wang Lei
Published: August 2013

An analysis is conducted and solutions are provided for the dynamic performance of high speed hybrid thrust bearing. By adopting bulk flow theory, the turbulent Reynolds equation is solved numerically with the different orifice diameter and supply pressure. The results show that increasing supply pressure can significantly improve the bearing stiffness and damping, while the orifice diameters make a different effect on the bearing stiffness and damping.
A New Type of Automatic Feeding Device for Biomass Briquetting Machine
Authors: Xia Xian Fei , Wu Kai , Zhu Qing Peng , Sun Yu , Jiang Qing Hai
Published: August 2013

Biomass is a kind of important renewable energy resource, while the solidification technology provides an effective way for its energy utilization. The current feeding device of the biomass briquetting machine in China is manual or semi-automated, with low production efficiency. A new kind of automatic feeding device has been designed to meet the continuous feed requirements of a production line with the production capacity of 10~12 T/h in this paper. The shaftless screw device can realize continuous material supply, and the batch hopper provide materials for different briquetting machine, at the same time the crank-rocker mechanism provides certain vibration to prevent material clogging. This device gives a uniform material supply with a high degree of automation, which can improve the biomass fuel production effectively proved by practice.
Finite Element Analysis on Thermal-Stress in Lining Expansion Gap Setting Affects on 150t BOF Shell
Authors: Ren Xue Ping , Wang Guang Kun
Published: August 2013

Converter body is the core device in oxygen converter, the thermal stress is the major factor affecting the lifetime of the converter, ansys the stress level in different parts of the converter is essential to improve the converter life. This article using ANSYS software to analysis the converter thermal stress, analyze the converter thermal stress distribution in different parts. The results can provide theoretical basis for the converter design.
Simulation on Vibration Isolation System for Vibratory-Drum Test Stand
Authors: Zhang Zhi Feng , Xu Hui Gan , Kong Xian Ning , Yao Yun Shi
Published: August 2013

the reliability and vibration performance test of vibratory rollers have been done in the test field to ensure that the vibratory roller meet the quality requirement. At present, the indoor test stand for vibratory roller has not yet been studied at home and abroad. This paper designs the indoor test stand for vibratory roller and makes simulation analysis by the numerical model of vibration-drum and test stand. The vibration isolation system of test stand is determined as a function of the test stand mass (m2), the stiffness of rubber tire (k1) and the stiffness of the vibration isolation block (k2). The test results showed that the vibration drum-test stand model can account for the vibration isolation system.
Modeling and Simulation of Thermostatic Mixing Valve
Authors: Chen Hai Chu , Wu Fang Yi , Zhang Ping , Xiong Gen Liang , Zhu Yin Fa
Published: August 2013

It researched a new type of intelligent thermostatic mixing valve which could keep the temperature and flux of the valve outlet water constant through the adaptive controller. It firstly established the mathematical model about angle - flux and angle - temperature of the valve. And then it based on thekεturbulence model and applied Fluent software to numerical simulation of the valve about the flow field. Finally, it compared the simulation results with the calculated value. The results show that they are basically consistent, prove the correctness of the theoretical research, and can be used to improve designing of the thermostatic valve.
An Overview of Foreign Matter Invasion Systems for High Speed Railways
Authors: Su Qian , Jiang Wei , Zhang Xiao Xi , Li Yu Jie , Yang Ling Ling
Published: August 2013

foreign matter invasion is a disastrous hazard regarding the safety and stability of high speed railway. Considering the fact that foreign matter invasion forecast is not matured yet,development of foreign matter invasion warning system is a very important countermeasure for foreign matter invasion disaster mitigation. Basic principles of the foreign matter invasion warning system and its application to railways are presented. The state-of-the-art of the foreign matter invasion warning systems for high speed railways around the world is introduced. Main points in development of the foreign matter invasion warning system for high speed railways are discussed, including layout of monitoring stations and monitoring means selection, with particular attention paid to railway safety operations. The present review is expected to be of significance to the development of the early warning system for high-speed railways in China.
Effect of Pretension on the Dynamics of Chain Drives
Authors: Pereira Candida , Ambrósio Jorge , Ramalho Amilcar
Published: August 2013

Suitable methodologies for the dynamic analysis of chain drive mechanisms, based on a multibody systems formulation in which clearance revolute joint formulation is extensively used, have been developed and implemented in a simulation code. The use of tightener systems has been recognized as the most effective way to improve the performance of chain drive mechanisms, since the occurrence of instabilities and vibration patterns of the free chain strands between sprockets can be largely reduced. As a result, these components have been extensively used in car and marine engines. Their influence on the dynamics of the system is analyzed in this article.
High Power Soft Switching Current Buck DC-DC Converter for Fuel Cell Electrical Vehicles
Authors: Wang Dian Long , Zhang Zhi Yang , Li Yan Gang
Published: August 2013

Fuel cell electric vehicles (FCEV) are emerging clean energy vehicles. A new soft switching current buck DC/DC circuit topology for FCEV was proposed. The characteristics and working process of the circuit topology were analyzed. By appending inductor, capacitor, diode in basic buck circuit, the converters main power switch and diode current were working in soft switching status, and the converters EMC and reliability were improved greatly. The circuit was simulated with Orcad software and its switch waveform, efficiency curve of 90kW DC/DC converter developed based on the topology was given. The converter has been used in the domestic fuel cell city buses successfully and proved to operate with reliability.
Application of the Mond Index in the Safety Assessment of Obsolete Solid Rocket Motor Pretreatment
Authors: Han Qi Long , Zhu Zuo Ming
Published: August 2013

Security is the first requirement of obsolete solid rocket motor pretreatment. In response to this requirement, quantitative safety assessment of four units in the pretreatment of obsolete solid rocket motor was carried out by using ICI Mond Index; risk rating of each unit was obtained and weak links in the pretreatment security were analyzed; and then appropriate safety measures were proposed, providing scientific guidance for the safety of obsolete solid rocket motor pretreatment.
Research on Axis Piezoelectric Six-Axis Force/Torque Sensor Clamping Device
Authors: Li Ying Jun , Zhang Qi , Wang Gui Cong
Published: August 2013

Six-axis force measurement and real-time force feedback control is realized the basis of the coordination of multi-equipment operation control and conform control, and is developed the technical basis of overloaded operators equipment and other heavy equipment. A surface friction clamping device which is based on the principle of swelling is designed in the paper, and is used to rigid connection between the six-axis force sensor and parallel shaft. The measuring principle of six-axis force sensor is analyzed. Six-axis force sensor dynamometer performance is researched under the influence of clamping device. Modeling and simulation analysis of the structure is obtained by using FEM and loading experiment is designed.
Error Analysis of the ATOS 3D Optical Scanner in Vehicle Measurement
Authors: Xie Xue Dong , Zhao Wei Ling
Published: August 2013

ATOS three-dimensional optical scanner is one of the most advanced technologically three-dimensional optical scanning devices. It can automatically put together the multiple scan view image by the reference point of the measurement system, with high accuracy, high speed Etc. It is widely used in automobiles. The paper combines with the experience in vehicle measurements, analysis the error cause in the actual use, points out ways to reduce or eliminate error. It has the great application value to actual measurement.
Efficient Inspection Algorithm for IC Solder Joints Based on Feature Statistical Analysis
Authors: Xie Hong Wei , Zhang Kun
Published: August 2013

An efficient feature statistical analysis based inspection algorithm for IC solder joint inspection is proposed. The defect detection is divided into training stage and test stage. In the training stage, three simple but efficient features are extracted and trained with Greedy Expectation-Maximization method. In the test stage, sub-regions are tested using the critical features. The defect diagnosis rules are defined to determine the specific defect types. To evaluate the performance of the proposed method, experiment was performed, and the inspection results have verified the effectiveness of proposed method.
Defects Detection of Sheet Metal Parts Based on HALCON and Region Morphology
Authors: Han Bao An , Xiang Hui Yu , Li Zhe , Huang Jia Jun
Published: August 2013

In order to realize the manufacturing defects detection of sheet metal parts, a kind of defects detection method of the sheet metal parts based on region morphology has been put forward based on HALCON using the mathematical morphology knowledge: by choosing the proper structuring element and neatly applying dilation, erosion, opening and closing on the defects images, the defect part is extracted. The experiment shows that the effect of this method is good and the calculation and processing speed is fast.
Waveband Selection for NIR Spectroscopic Analysis of Zn2+ in Soil
Authors: Yao Li Jun , Chen Jie Mei , Pan Tao
Published: August 2013

Near-infrared (NIR) spectroscopy combined with moving window partial least squares (MWPLS) method was successfully applied to the waveband selection for the rapid chemical-free determination of Zn2+ in soil. Based on randomness and similarity, an effective approach was performed to obtain objective and practical models. The optimal MWPLS waveband was 1136-1252 nm, and the corresponding optimal number of PLS factors was 6. The validation root mean square error (V-SEP) and validation correlation coefficients (V-RP) of prediction were 15.658 mg kg-1 and 0.925, respectively. The Zn2+ prediction values of the validation samples are close to the measured values. The results provided a reliable NIR model and can serve as valuable references for designing the dedicated spectroscopic instruments.
The Measurement and Analysis of Torsional Vibration for Rotating Machinery
Authors: Yao Wei Hao , Zhao Ke Gang
Published: August 2013

In this paper, the virtual instrument technology is used in torsional vibration study to create a set of torsional vibration natural frequency detection scheme for rotating machinery which is based on the characteristics of controllable one-way overrunning clutch. Also, a test system that is highly sampling frequency, good accuracy and fast data processing capability is developed. This system consists of high-precision dynamic torque sensor, microprocessor-based high-speed data relay module, IPC-based workbench. Finally, the measured results and the calculated results were compared, and it shows that the measured and the calculated results come very close.
A Research of Rice Water Stress Index Based on Automated Infrared Thermography Technology
Authors: Gao Ming Chao , Zhang Wen Zhong , Han Ya Dong , Yao Chen , Wang Yi Tao , Ding Guo Hua , Zhang Zhen Yu , Bian Jing Yang
Published: August 2013

It detected the canopy temperature of rice via automated infrared imaging technology in the test under different irrigation condition, taking the Idso empirical model to determine the lower bound equation of the canopy-air temperature differences, and so to get the best period of observing the rice water deficit by theCWSI, in addition the relationship of theCWSI, soil water content and transpiration rate were also analyzed. The preliminary test analysis showed that theCWSIcan reflect the rice water stress conditions well.
Motion Analysis and Research of Manipulator in Unilateral Suture Robot
Authors: Yao Fu Lin , Li Liang Yu , Yue Jian Feng
Published: August 2013

To manufacture three-dimensional textile composite preform using method of unilateral suture technique, a unilateral suture manipulator system has been designed. In order to inspect whether it can meet the design requirements , this article establish the kinematic model of the major institutions by using vector method,and use simulation software to analysis the kinematics of thread-leading, thread-hooking and thead-taking-up mechanism. Accordingly, law of motion graphs of the mechanism can be reflected, and the simulation results demonstrate the design of unilateral suture manipulator which are reasonable and efficient.
A Novel Robotic Motion Control Strategy Based on Improved Fuzzy PID and Feedforward Compensation
Authors: Jin Xing Lai , Zhu Shi Qiang , Wu Wen Xiang , Luo Shao Cheng
Published: August 2013

Aiming at the difficulties to establish dynamic models of industrial robots, a novel fuzzy PID controller based on product strategy was presented. Membership degrees was determined according to position error and error change. Meanwhile, parameters of the fuzzy-PID controller would be tuned by the varied factors calculated from the membership degrees based on product strategy. Considering disturbance of friction, feedforward based on Stribeck model was introduced. Compared with traditional PID controller, experiment of manipulator demonstrates better effectiveness and robustness of the controller. The new controller keeps tracking error within 0.4%.
The Application of Intelligent Industrial Robots in the Mine Research and Design
Authors: Yang Rong Ming
Published: August 2013

Coal mine safety accidents lead to national casualties and economic losses, to the greatest extent reduce accidents, it is a worldwide problem. In addition to strengthen safety management, security monitoring, there is a better way is to enhance the mine industrial automation process. The use of intelligent industrial robots in the mine, it will improve the efficiency of coal at the same time, and greatly reduce the risk of injury or even can effectively avoid accidents. This paper is to study one intelligent industrial robot which can use in the mine, and it use state-of-the-art motor control technology, and can operate it to high-risk job in the control room. In this paper, a detailed study of the specific structure of the industrial robots, and designed a complete set of control scheme.
The Improvement of Refrigerators Rotary Oil Pump
Authors: Jing Yan , Zhao Feng
Published: August 2013

Screw refrigerators are widely used in subzero refrigeration and storage fields. The manufacturers always use rotor-type pumps as their lubricating oil pumps. This paper introduces the advantages of screw refrigerators, the usage of oil pumps and the working environments. It mainly studies the common faults of oil pump, proposes several design ideas for analysis and comparison and determines the final improvement schemes on the premise of comprehensively considering structure, performance and cost.
Study of Permanent Magnet Synchronous Motor Current Robust Control Based on Adaptive Fast Terminal Sliding Mode Control
Authors: Qi Liang , Yang Yan Zhu , Bai Xu , Shi Hong Bo , Liu Wei Liang
Published: August 2013

In this paper, the main factors which influence the current control performance of the Permanent Magnet Synchronous Motor are studied and analyzed. A method, which combines the fast terminal sliding mode control and the current feed forward control methods, is proposed to solve the problems of the cross-coupling of d-q current in field oriented control. Meanwhile, an adaptive control law is designed for the system uncertainties of system parameters perturbation and external disturbances and so on. The convergence of the proposed method is proved by Lyapunov theory. The proposed control method is testified by computer simulation and improves the robustness of the Permanent Magnet Synchronous Motor control system.
Cooperative Control of Multiple Autonomous Underwater Vehicles
Authors: He Bin , Jiang Da Peng
Published: August 2013

The focus of research of AUV is gradually moving towards multiple autonomous underwater vehicles (MAUV) in recent years. This paper describes an investigation into cooperative control of MAUV. Firstly, a distributed control architecture (MOOS) was applied to MAUV system. According to MOOS, functionalities of AUV were organized in a modular manner and a unified information exchange mechanism was used to ensure an efficient communication between different modules. Secondly, a behavior based control strategy was proposed to enable the AUV to cooperate with each other intelligently and adaptively. Interval programming algorithm was applied to make sure that behaviors of each AUV can be coordinated in a timely and optimal manner. Stability of behavior-based control of AUV was analyzed. Finally, a distributed simulation environment was established and a series of simulation were carried out to verify the feasibility of methods mentioned above.
Stability and Stabilization of Discrete Switched Systems Based on Parameter-Dependent Lyapunov Functions
Authors: Wang Tong , Wu Song Pu , Wang Qing , Dong Chao Yang
Published: August 2013

This paper addresses the stability and stabilization of discrete switched systems which can be used to describe manufacturing systems. A new sufficient and necessary condition in the use of parameter-dependent Lyapunov functions is proposed to guarantee the switched system stability under arbitrary switching. The control synthesis approach presented in this work reduces the conservatism by slack variables while investigating the static output feedback control issue. A cone complementarity linearization algorithm is applied to make the condition a minimization problem in the form of LMIs. By numerical evaluation, the new control design technique is illustrated to be more efficient.
The Problem of Selection of Fingerprints for Topological Localization
Authors: Popov Vladimir
Published: August 2013

Visual navigation is extensively used in contemporary robotics. In particular, we can mention different systems of visual landmarks. In this paper, we consider one-dimensional color panoramas. Panoramas can be used for creating fingerprints. Fingerprints give us unique identifiers for visually distinct locations by recovering statistically significant features. Fingerprints can be used as visual landmarks for mobile robot navigation. In this paper, we consider a method for automatic generation of fingerprints. Since a fingerprint is a circular string, different string-matching algorithms can be used for selection of fingerprints. In particular, we consider the problem of finding the consensus of circular strings under the Hamming distance metric.