bluuebunny/crossref_metadata_2025 huggingface dataset:
Preparation and Mechanism of Cordierite by Using Calcined Bauxite as Raw Material at Relatively Low Temperature
Authors: Wu Jian Feng , Fang Bin Zheng , Xu Xiao Hong , Lao Xin Bin
Published: September 2013

The cordierite was synthesized at relatively low temperature by pressureless sintering method, using calcined bauxite, talcum , quartz and feldspar as raw materials in this paper. The water absorption (Wa), porosity (Pa), bulk density (Db) and bending strength of samples have been tested, and the synthetic process and mechanism have been investigated by XRD, SEM, and so on. The results showed that the cordierite could be synthesized at 1280°C and the range of synthetic temperature is 1160~1300°C, when the sample was sintered at 1280°C for 2h, its bulk density and bending strength were 2.20g/cm3and 72.13MPa, respectively. XRD analysis showed that the main phase of sample was cordierite, the cordierite content was about 88wt%, and the minor phases were MgAl2O4spinel and corundum. SEM results showed that the samples were dense and the pore sizes were 5 μm~100μm, the grains were growth and development well, the grains size were 0.5μm~6μm. High reaction activity corundum and mullite were provided by calcined bauxite, then coupled with the role of feldspar, thus reduced the synthetic temperature of cordierite.
Research Advance on Comprehensive Utilization of High Iron Bauxites
Authors: Ni Jian Wen , Li Zai Yuan , Wu Yan , Feng Yi
Published: September 2013

How to effectively use high iron bauxites to alleviate the shortage of bauxite resources has become an hot topic in China. According to the technological characteristics, the method of comprehensive utilization of high iron bauxites can be included: first iron then aluminum, first aluminum then iron and simultaneous recycling iron and aluminum. This paper will review the research progress on the comprehensive utilization of high iron bauxites.
Surface Cracks Analysis on Continuous Casting Slab Q345c during Hot Delivery and Hot Charging
Authors: Wang Sheng Zhao , Zhao Gang , Bao Si Qian , Chen Jian , Lu Li Wei
Published: September 2013

The temperature field and stress field were simulated using the finite element software (ABAQUS) for Q345c continuous casting slab during cooling process. The hot ductility curve, high temperature tensile strength curve, and the surface stress value were obtained according to thermal simulation experiments. The results show that the temperature of brittleness zone is at 600-850°C, and the value of surface stress is larger than the high temperature tensile strength in the slab cooling process. The heat insulation device should be installed between the flame cutting machine and the heating furnace to avoid hot crack defects caused by excessive thermal stress on the surface in the process of hot slab delivery.
Studying on Leaching Zinc Oxide Ore in the System of H2SO4
Authors: Mao Ying Bo , Wei Zhi Cong , Fang Jian Jun , Wang Shan , Zhang Tie Min
Published: September 2013

Leaching test on the Oxidized Zinc Ore coming from Yunnan Province is studied in the H2SO4 system;Systematic studies are made to show the effects of various factors on the leaching rate of zinc. The optimum conditions for leaching is finally confirmed, namely the grinding size is 75% of-0.074mm, concentration of sulfuric acid 15%, temperature 60°C, solid to liquid ratio 3:1, and leaching time 2.5h. Ultimately, the leaching rate of Zn could reach more than 59%.
Recent Progress on Derivation and Chemical Modification of Rosin Acids
Authors: Lu Yan Ju , Xu Rong Sheng , Zhao Zhen Dong , Zhang Ping Hui , Wang Mi Xia
Published: September 2013

Rosin has been recognized as one of the most important renewable resources in the forest chemical industry. It is a complex mixture of acidic and neutral compounds. The isolation method, derivation and modification of rosin acids were summarized mainly, such as isomerization, disproportionation, hydrogenation, maleation and esterification of rosin acids were reviewed. It is considered that the derivation and modification of rosin acids is the most important way to use rosin in higher value.
Hydrothermal Synthesis of Zeolites from Lake Sludge
Authors: Shao Yan , Salim Chris , Hinode Hirofumi
Published: September 2013

Sludge tends to accumulate easily in lake due to the closed water system and the pollutants contained inside could cause serious environmental problems. The sludge accumulation is mainly solved by dredging the lake, although the general disposal method of the dredged sludge by landfilling remains a problem due to formation of soft-ground and limited space. In this study, the conversion of the dredged sludge into adsorbent material that can be used for water treatment was tried. Using hydrothermal treatment in alkali medium, lake sludge which main components are silica and alumina could be converted into zeolite. The effects of various treatment conditions (NaOH concentration, alkali solution volume to dry sludge weight L/S ratio, Si/Al molar ratio, reaction temperature) were investigated. The adsorption abilities of synthesized zeolites were evaluated by measuring the cation exchange capacity (CEC) value and adsorption capacity towards heavy metals in aqueous solution (Pb, Cd). Soluble elements in sludge such as silica and alumina tend to dissolve at higher temperature and form zeolite. Zeolite type Na-P1 which was synthesized at silica/alumina (Si/Al) ratio of 2.5 and reaction temperature of 120°C showed the highest CEC value. The synthesized zeolites showed some adsorption ability towards heavy metals in aqueous solution (Pb2+ (Xm=55.3mg/g) and Cd2+ (Xm=40.9mg/g)).
Modeling and Simulation of Hydraulic Excavator Based on Virtual Prototype
Authors: Zhou Yi Jun , Kan Wang
Published: September 2013

Hydraulic excavator plays a significant role in the modern engineering, it was bored complex and changing work stress and strain, its structural strength design directly affect the performance and reliability of the excavator. The virtual prototype technology can simulate all kinds of working conditions and achieve the ideal effect by optimizing parameters. In this paper, the 3D modeling of a hydraulic excavator was established using the Solidworks and converted into ADAMS software environment, added the constraints, the drives and loaded epigenetic reasonably and generated the main working parts of the virtual prototype model. The limit work trajectory displacement graph was given, and we obtained the change characteristic curve of the hinge point of the force at work. The static strength was analyzed by the finite element model in ANSYS, the stress and strain nephogram of the working device show that the reasonableness and correctness of the design, it provides a convenient and efficient means for the excavators design and optimization.
Nonlinear Stability Impact of Concrete-Filled Steel Tube Arch Bridge
Authors: Zhang Yuan Yuan , Yu Chun Lei
Published: September 2013

CFST Arch Bridge under pressure mainly stability is one of the key factors restricting its development. Most of the arch of instability belongs to the second type of instability, and that the non-linear deformation of the structure is nonlinear state, the mechanical properties of the structure also change from elastic state into nonlinear state. In this paper, based on nonlinear and stability theory and using the finite element software ANSYS, parameters of affecting the main arch stability were studied. By analyzing the geometric and material nonlinear factors on the structural stability, the parameters of influence on the stability of the main arch were discussed, including width-span ratio, arch-rib inside inclination, rise-span ratio and arch-axis coefficient. The influence law of these parameters were summarized and will be used to guide the actual project.
The Effect of Cover Thickness to Corrosion Characteristics of Reinforced Steel Bar Emedded in Mortar Specimen (W/C:0.6) Aged 5 Years in Seawater
Authors: Lee Sung Yul , Won Jong Pil , Park Dong Hyun , Lee Myeong Hoon , Moon Kyung Man
Published: September 2013

Reinforced concrete structures have been increasingly widely used through numerous industrial fields. These structures are often exposed to severely corrosive environments such as sea water, contaminated water, acid rain, and the seashore. Thus, corrosion problems of the steel bars embedded in concrete are very important from a safety and economic point of view. In this study, the effects of cover thickness on the corrosion properties of reinforced steel bar embedded in mortar specimen (W/C:0.6) were investigated using electrochemical methods such as corrosion potentials, polarization curves, cyclic voltammograms, galvanostat and potentiostat. Corrosion potentials shifted to the noble direction, and the value of AC impedance also exhibited a higher value with increasing cover thickness, furthermore, polarization resistance also increased with increasing cover thickness. This is probably that the thinner cover thickness, seawater solution is easy to arrive at embedded steel compared to other thicker cover thickness, so, its steel bar may be easily corroded due to chloride ion, which is resulted in shifting corrosion potential to negative direction, decreasing polarization resistance. Consequently, it is considered that the relation between corrosion resistance of reinforced steel and cover thickness is nearly matched with each other. However, its corrosion resistance estimated by measurement of corrosion potential was not well in agreement with value obtained by polarization curves.
Existence and Uniqueness of Positive Solutions of a Randomized Spruce Budworm Model
Authors: Li Yan Qiu , Gao Hai Long
Published: September 2013

Spruce Budworm is the most destructive defoliator of coniferous forests in Western North America .This paper discusses a randomized Spruce Budworm model with HollingIII Functional Response. Using results from lyapunov function, we show that the positive solution of the associated stochastic differential equation does not explode to infinity in a finite time under simple assumption .It is shown to improve existing results.
Effective Controlled Method Adding Carbon into Molten Steel to Produce 55Q Steel
Authors: Zhang Tie Jun
Published: September 2013

It is very important to produce 55Q steel with the exact carbon content. Low and inconsistent carbon elemental recovery problems are often encountered when adding pig iron, or carbon powder into the baths of light rail steel. This is the case because carbon presents some of the following characteristics: lower density much more than the molten steel, low solubility in the liquid steel, high affinity due to oxygen. These circumstances lead to difficulties or risks, such as: poor or erratic recovery of alloying carbon element, violent and dangerous splashing, adverse environmental impact. To counter these problems existed in conventional method, carbon cored wire was prepared and wire injection process introduced in this work, and the effects of parameters such as feeding rate, etc on carbon recovery are investigated. The results show when using the carbon wire injection method, stable carbon addition is obtained, that is, the mean recovery of the carbon absorption is 90%, and what's more, the carbon content is under control accurately and environment improved.
Modeling and Simulation of Monocrystal Piezoelectric Generator
Authors: Zhang Lei , Fang Li Qing , Guo De Qing , Chen Yong Chao
Published: September 2013

The expressions of voltage, stress and amount of charge of monocrystal piezoelectric generator under concentrated exterior pressure was derived in order to proving the precision and validity of numerical method applied to piezoelectric materials' distribution sensing and the study of operation mechanism ignore the influence of adhesive layer. An analytical model of the monocrystal piezoelectric generator was established by using the mechanical vibration theory. And the effects of the structural and material parameters on the output energy are analyzed.
Simulation of Filling and Solidification Processes of Rump Pan by Procast
Authors: Liang Tao , Qu Yin Hu , Liu Xin Feng , Wang Feng , Zhang Min Hua
Published: September 2013

The rump pan is the body and the load-carry device of Scraper conveyer. the material is ZG30MnSi. In order to improve the life of the casting.this paper simulated filling and solidification process of rump pan by Procast software,and predicted the position of shrinkage cavity and shrinkage porosity in castings.Then through improving gating system and add reasonable risers, optimal process parameters scheme is got.
Finite Element Simulative Analysis on the Influence of Solid-State Transformation on Welding Residual Stress
Authors: Li Chun Run , Zhang Zhi Peng , Zhang Yi Ming , Fang Zong Tao
Published: September 2013

This paper takes the Q345 steel as an example, adopting finite element simulative analysis to study the influence of solid-state transformation on welding residual stress. By setting the value of the thermal strain in different temperature, the change in volume caused by the phase changes is equivalent to the thermal strain. Simulation includes two cases which are consideration of phase transformations and not consideration. The results showed that the distribution trend of the longitudinal stress of the weld zone is substantially the same in the two simulations. In the case of not consider the simulation of phase change, there is a lot of stress in the weld zone and the heat affected zone and the maximum value could be 427 MPa. In regard to transverse stress, phase change not only affects the value of the stress, but also changes the direction of the stress of the weld middle portion. Welding residual stress is also measured by X-ray. Phase change simulation and experimental results are in good agreement, it can be concluded that phase change in the welding process will result in a significant impact on the distribution of the residual stress, which could not be ignored in the finite element simulation of welding process.
The Research of Adhesively-Bond of Paster Single Lap Joints on Strength Based on ANSYS
Authors: Wang Yu Qi , He Xiao Cong , Xing Bao Ying , Zhou Sen
Published: September 2013

The adhesive-bond of paster single lap joints was put forward firstly. The strength of 5052Al-Al adhesive-bond of single lap joints (SLJ) and 5052Al-Al paster adhesive-bond of SLJ were investigated using finite element method (FEM). Results from the simulation showed that the paster adhesive-bond of SLJ was stronger than the adhesive-bond of SJL. So it can use the paster adhesive joints to improve the strength of adhesive joints.
An Improved Dynamic Constitutive Model of Dynamic Mechanical Property of Concrete
Authors: Wang Pan Xiu , Zhou Gui Yun
Published: September 2013

An improved dynamic constitutive model is presented, aiming to describe the key mechanical properties and predict the bearing strength of concrete structure under static and dynamic load. This model is based on the concept of equivalent uniaxial strains and strain rate. In this paper, an equivalent uniaxial stressstrain curves are obtained by the WillamWarnke curve and take the same form as in Saenz models. Then, the bending strength of a concrete beam under different static and dynamic load was discussed.
Car's Materials Acoustic Properties Test and Analysis
Authors: Liu Yan , Zhang Xiao Juan , Liu Zong Cai
Published: September 2013

With the development of the car industry, the pace of the urban construction is accelerating as well. Cars have gradually entered the ordinary family. As the car noise has a big effect on the health of the passengers, as well as on the surroundings, one of the car industry key duties is the car noise reduction. By researching the materials applied to car, this article describe that PU material could reduce the impact of the engine noise on the cab efficiently; Polypropylene needle-spun felt could reduce the noise passed by chassis; PET material's sound absorption is poor in mid bass, however in high frequency it's sound absorption is good; sound absorbing sponge can reduce the low and high frequency noise; The combine sponge can reduce the noise from the tire and transmission system ; Cotton material could absorb the high frequency noise.
Loading Test Scheme Research on Long-Span Suspension Bridges
Authors: Li Xiao Bin , Yan Meng , Yu Qu , Zeng Xiang Lin
Published: September 2013

In order to get a full understanding the whole bridge's actual stress state and dynamic performance as well as to check whether the bridge structure could meet the requirements of carrying capacity and traffic capacity, loading test has been carried out to the Nanxi Yangtze River Bridge. As the bridge is a long-span suspension bridge, there is a significant geometric non-linear effect which must be considered in the calculation. Besides, a reasonable field test organization scheme is necessary to guarantee the success of the test since there are a variety of working conditions and a large number of loading trucks. Finally, this kind of static and dynamic load test has a high guiding significance to the field test.
Structural Analysis and Optimal Design of Lightweight Skate for Loading and Unloading
Authors: Cha In Pyo , Shin Hee Jae , Lee Neung Gu , Kwac Lee Ku , Kim Hong Gun
Published: September 2013

Topology optimization and shape optimization of structural optimization techniques are applied to transport skate the lightweight. Skate properties by varying the design variables and minimize the maximum stress and strain in the normal operation, while reducing the volume of the objective function of optimal design and Skate the static strength of the constraints that should not degrade compared to the performance of the initial model. The skates were used in this study consists of the main frame, sub frame, roll, pin main frame only structural analysis and optimal design was performed using the finite element method. Simplified initial model set design area and it compared to SM45C, AA7075, CFRP, GFRP was using the topology optimization. Strength does not degrade compared to the initial model, decreased volume while minimizing the stress and strain results, the optimum design was achieved efficient lightweight.
Research of All-Hydraulic Die Forging Hammer Control System
Authors: Zhang Yin Juan
Published: September 2013

This paper presents the structure and work principle of hydraulic die forging hammer. The mathematic model is established based on momentum theorem which is used to confirm the forging energy and blow number of times. At the same time,it offered the theories reference for the precision control of the run process. The speed, displacement and kinetic energy variety of hammer head were simulated. This research provided the foundation of further controllable and flexible for the forging energy and times.
Design and Acoustic-Structural Coupling Analysis of Bionic Microphone
Authors: Yang Wei , Qiu Jian Xi
Published: September 2013

Sensorineural hearing loss is caused by the damage of hair cells in the inner ear, the transmission of acoustical signal is disrupted without hair cells. In order to solve the problems exist in electrical cochlea,the idea of develop bionic microphone is proposed using the special property of piezoelectric material. Primary design of the size of bionic microphone is given with the reference of advanced manufacturing methods. According to the scope of human hearing threshold, Acoustical-structural coupling property of the bionic microphone is researched when the microphone is immersed in lymph. And the results shows that the displacement is going up at first and then down with the increasing of the frequency within 1000Hz, the displacement is 0.28mm when the frequency is 500Hz,and goes down to 0.205mm when frequency is 1000Hz. When frequency is varied from 1000Hz to 10000Hz, the displacement is changing apparently. The displacement has been changed from 0.208mm when the frequency is 1000Hz to 2.6um when the frequency is 10000Hz. Frequency selectivity is not clearly presented from the point of the location of maximum displacement,and this phenomenon may caused by the fasten mode of designed microphone and high Young modulus of silicon.
Heat Release Performance of the Flame Retardant Rigid Polyurethane Insulation Foam
Authors: Zhang Ze Jiang , Li Li Jun , Li Feng , He Jin , Gan Zi Qiong
Published: September 2013

Influence of different flame retardants on the heat release performance of the rigid polyurethane foam (RPF) was studied in this paper. It was found that adding antimony trioxide (ATT) in RPF, heat release rate of RPF was slightly reduced, total heat release was significantly decreased but peak of heat release temperature was decreased. Therefore, ATT was not an excellent flame retardant for RPF. When adding ammonium polyphosphate (APP) in RPF, total heat release of RPF was significantly decreased, ignition temperature was significantly improved and heat release rate was not changed. Melamine polyphosphate (MPOP) could quickly reduce total heat release of RPF so its flame retardant effect was the best. Nitrogen-based flame retardants could reduce peak of heat release rate of RPF. APP, MPOP and nitrogen-based flame retardants were all better flame retardants for RPF. Small amount of magnesium hydroxide (MH) could increase total heat release of RPF.
Signal Reconstruction Based on a Fusion Compressed Sensing Frame
Authors: Li Xu Hua , Chen Yue Li , Hu Nan Jun , Li Wei , Yuan Tian Jun , Wang Yu , Hou Ying
Published: September 2013

Greedy algorithms represented by orthogonal matching pursuit (OMP) and subspace pursuit (SP) algorithms are practically used in image processing based upon compressed sensing theory. However, there are two disadvantages: 1)Relatively poor signal reconstruction accuracy; 2) High computation complexity and measurements time. This paper proposes a frame of greedy algorithms obtaining a novel fusion of matching pursuit (FMP), combining the OMP and SP algorithms. FMP unites the two support sets from OMP and SP selecting the most appropriate atoms to achieve secondary screening of the original two support sets, finally realizing the accurate signal reconstruction. Using same test conditions, image reconstruction experiments and stability of Frame, the proposed FMP algorithm can effectively improve signal-to-noise ratio (SNR) with improved reconstruction error. Reconstruction effects using proposed FMP are better than separately using other two greedy algorithms for both high and low resolution images.
Research of Model Based Imaging and Wave Impedance Inversion of Seismic Signal
Authors: Zhang Xin , Chen Guang Xun , Hu Deng Ke , Zhang Lei
Published: September 2013

In order to find a better inversion solution suitable for special gas hydrate exploration area with distinctive geological conditions, this paper proposed model based wave impedance inversion. This new solution can fully use seismic data and logging or pseudo-logging data to establishing an initial model. By continually modifies and updates the geological model through model selective preference iteration, the inversion can figure out a final model that possesses accordance with the actual seismic data. Model based wave impedance inversion can break the limit of traditional seismic resolution theory and can bring the interpreter high quality inversion result and high resolution profiles.
A Measurement and Analyze System for the KY231 Material Strain Tester Base on STM8S207 and Virtual Instrument
Authors: Liang Tie Wang , Ren Yan
Published: September 2013

A measurement and analysis system is designed base on the requirement of digital upgrade to the KY231 Material strain tester. This system is made up of two parts :The analyze system based on the LABWINDOWS and the measurement system based on STM8S207. The physical quantities (such as stress, pressure, deformation, etc.) of the metal specimen are acquired, displayed and analyzed digitally in this system, meanwhile the experimental data and curves can be stored in the systerm and compared to the historical data saved in the previous files. Because the USB interface is too complex to the MCU systerm form the aspart of the programming and circuit design, the PL2303 is used to simulate USB interface as virtual RS232 for the communication between the measurement system and the analyze system.
Elliptical Measurement for Faraday Rotation in Multimode TeO2-ZnO-Na2CO3 Fiber for Magneto Optical Current Sensor Application
Authors: Chen Qiu Ling , Wang Hui , Chen Qiu Ping
Published: September 2013

The design and measurement of Verdet constant of magneto optical fiber is reported. An optical beam was found that it linearly polarized at the fiber input changes to elliptically polarized after propagating down the fiber and an elliptical fitting method was studied and reported. Traditional method is based on circle polarized principle, rotation angle is obtained through manually adjust the polarizer which is rather inaccurate especially for small rotations. Through the development of elliptical fitting equations and the test of intensity on major and minor points, fiber Verdet constant can be measured more precisely. The measured data of TZN (TeO2- ZnO-Na2CO3) fiber was verified and it provides improved accuracy compared with existing methods.
Matlab Image Processing Technique and Application in Pore Structure Characterization of Hardened Cement Pastes
Authors: Lu An Qun , Zhang Shou Zhi , Tian Qian
Published: September 2013

Based on Matlab image processing technique and backscattered electron image analysis method, a characterization method is set up to make quantitative analysis on pore structure of hardened cement pastes. Adopt Matlab to acquire images, and carry out gradation and binarization processing for them; use the combination method of local threshold segmentation and histogram segmentation to obtain pore structure characteristics. The results showed that evolution law of pore structure of fly ash cement pastes via Matlab image analysis method is similar to the conclusion obtained through BET and DVS. Selecting different angle of backscattered electron images in the same sample, its statistic results are more representative.
Research on the Application of Using Genetic Algorithm in Military Materials Delivery
Authors: Zhang Wu Jun
Published: September 2013

Military materials delivery is new technology of logistics, and can help the army to easily and accurately deliver the military materials to every point to be guaranteed. Military materials delivery is gradually used; the optimization problem of the delivery process had been appeared. Genetic algorithm is imitate living creature environment in of a kind of orientation overall situation of the genetic, can be professional at solving complicated system or the huge problem. Thus, the paper firstly introduced the basic theory of military materials delivery, including the definition, principle, factors to set up the model of military materials delivery; then analyzed the process of genetic algorithm, using it to optimize the military materials delivery, example was given out.
A Markov-Based Multi-Attribute Vertical Handoff Decision Algorithm
Authors: Song Qing Yang , Li Xun , Ding Shu Yu , Ning Zhao Long
Published: September 2013

Many vertical handoff decision algorithms have not considered the impact of call dropping during the vertical handoff decision process. Besides, most of current multi-attribute vertical handoff algorithms cannot predict users’ specific circumstances dynamically. In this paper, we formulate the vertical handoff decision problem as a Markov decision process, with the objective of maximizing the expected total reward during the handoff procedure. A reward function is formulated to assess the service quality during each connection. The G1 and entropy methods are applied in an iterative way, by which we can work out a stationary deterministic policy. Numerical results demonstrate the superiority of our proposed algorithm compared with the existing methods.
Research of Diver Sonar Image Recognition Based on Support Vector Machine
Authors: Li Ke , Li Chong Lun , Zhang Wei
Published: September 2013

To recognize small diver target from the dim special diver sonar images accurately, the Support Vector Machine method is used as classifier. According to the main characteristics of diver, five feature parameters, including Average-scale, Velocity, Shape, Direction, Included angle, are chosen as the input of characteristics vectors to train the net. And then the testing images are classified and identified. The experimental results show that accuracy rate of recognition reaches 94.5% for as many as 200 testing images. The experiment indicates that small object recognition from complex sonar images based on the right selection of feature parameters is of good performance by using the SVM method as well as good engineering foreground.
Estimation of Fracture Toughness of Fiber/Matrix Interface
Authors: Zhao Yu Ping , Yuan Hong , Liu San Xing
Published: September 2013

To estimate the level of interfacial adhesion between the fiber and polymer-matrix in fiber/matrix composites, interfacial fracture toughness was derived based on an energy balance scheme. A break gap occurring at the initial interface debond during fragmentation test was taken into account. The external work and work done against friction slip at debonded interface were included in energy balance scheme. The interfacial fracture toughness obtained is a function of fiber and matrix material properties and critical debond strain which is the external strain applied on the specimen to initiate interfacial debonding. The break gap calculated increases with increasing applied load and decreasing friction coefficient. The proportion of each energy terms in energy balance equation was calculated. Comparison between the predicted interfacial fracture toughness and that numerical result was done.
Perspective on Effect of the New Model "Contest of Comprehensive Chemistry Experiment"
Authors: Li Hong Xia , Zhang Jun Jie , Zhao Yan Qin
Published: September 2013

New model "contest of comprehensive chemistry experiment" participants are university students major in science and engineering. The contest consists of theoretical knowledge examination and research projects completion. Theoretical knowledge examining stage is conducted in the way of closed-book examination. Research projects were completed under the tutors, including experimenting and research papers writing. The topics are related to chemistry or chemical engineering. Awards are evaluated by thesis query. Students many skills, such as consulting literature, experimental skill, writing paper and cooperating with others, can be trained in this contest, so their comprehensive qualities are enhanced.
Comparison on Dam Risk Consequences Comprehensive Evaluation Model
Authors: Sun Wei Wei , Li Lei , Zheng Hao Yao , Zhao Xue Ying
Published: September 2013

Many evaluation factors are involved in dam risk consequences comprehensive evaluation, which exist plenty of uncertainty and correlation between each other. Combined the five methods, such as linear weighted sum method, fuzzy mathematics method, matter element method, gray correlation method and principal component method with dam risk consequences comprehensive evaluation, establishing five dam risk comprehensive evaluation models, applying to the level evaluation of Changlong Reservoir, Xialan Reservoir, Shibikeng Reservoir, Longshan Reservoir, Lingtan Reservoir successfully.
Supply Chain Coordination Mechanism Logistics Cost Optimization Analysis
Authors: Yang Qiang , Zhu Hong Xiang
Published: September 2013

This paper deals with a two-stage supply chain including one supplier and one purchaser. The two coordination mechanisms: traditional supply chain and vendor-managed inventory, are analyzed on their logistics cost optimization capabilities under the centralized and decentralized decision-making conditions. The conclusions are that the logistics costs are same under the centralized decision-making; vendor-managed inventory coordination mechanism is better than traditional supply chain coordination mechanism under the decentralized decision-making.
Measuring the Information Volume of Teaching Material in Physics and Chemistry on the Basis of the Inter-Disciplinary Connections’ Information Model
Authors: Gnitetskaya Tatyana N. , Ivanova Elena B.
Published: September 2013

This article presents a quantitative assessment method of information volume contained in a teaching material unit. The method is based on the inter-disciplinary connections information model elaborated by Gnitetskaya T. N. The method was applied to school chemistry and physics courses for the 8th grade. The cross-curricular links object is the concept of the electron. The information volume was calculated transferred through the electron concept as well as the minimum apprehension time of the teaching material in students. As a part of the method, the article presents an example of optimizing the inter-disciplinary connections in the teaching material. The possibility of designing the curricular contents based on the inter-disciplinary connections information model taking into account information limitations is shown.
A Research and Practice of the Course Construction of Architectural Drawing and CAD Course - The Awarded Achievement of the 7th Teaching Achievement Awards of Hubei Province
Authors: Wu Mu Hui , Ma Zhao Xia , Deng Yang
Published: September 2013

The project was identified as the college teaching research project of Hubei province in 2009. The project explores and practices the construction of new curriculum system of architectural drawing and CAD course actively under the work-integrated learning. The project pushes forward the course overall construction of architectural drawing and CAD course through the construction of teaching material, the reform of teaching methods, teaching techniques and examining modes. High quality teaching resource is provided and applicable talents cultivating quality is improved by the construction of excellent course. The operation ability of students is improved through the construction of training rooms, laboratories and training bases. Improving the talent training mode increases the engineering quality, practice ability and creative spirit. Through nearly four-year teaching practices, remarkable results are obtained.
An Inexact Fuzzy-Queue Programming Model for Coupled Coal and Power Management
Authors: Wei Ying Xu , Zhang Qiong , Pan Cheng
Published: September 2013

In this study, a coupled coal and power management model is developed based on an inexact fuzzy-queue programming method. The model is applied to a case study of coupled coal and power management system. The results indicate that the developed model can afford reasonable measures for solving coal-blending and coal-resources-allocation problems in coupled coal and power management system. It is useful for (a) standardizing coal supply, (b) improving efficiencies of the boilers, and (c) reducing emissions of air pollutants for meeting local air-quality targets. Potential risks associated with coal shortages and instability due to property variations from multiple sources can also be highly lowered through diversifying coal sources. Moreover, it can handle queue problems and multiple uncertainties exist in coupled coal and power management activities. Thus, it can help decision makers obtain optimal coal-blending schemes and coal-allocation patterns.
RFID-Based Agro-Materials Anti-Counterfeiting Management System in Whole Logistics Chain
Authors: Wang Shu Feng , Wang Kai Yi , Wang Xin Jiang
Published: September 2013

Agro-materials anti-counterfeiting management system (AMACM) integrates RFID, POS and barcode technologies to realize the functions such as selling management, inventory management, basic data management, information services and quantity auditing. This designed system has several features to meet the demand of agro-materials management. First, smart information collecting device records the each transaction information that builds a data basis for intelligent information analysis. Second, unique identification for each item makes the traceability more complete. Third, the proposed multi-segmented verification method realizes the verification of agro-material ID in each logistics link without increasing the complexity of system. Fourth, the applied technology of quantity auditing enforced the supervision of every retailer. So almost abnormal selling behaviors such as selling fake agro-materials or abnormal transferring is eliminated. Therefore, the agro-material chain business management could effectively be strengthened and operating cost is reduced greatly. This system has a great significance for the promotion of agro-material production and a broad application prospects.
Evaluation on the Plate Laminated Method Using 3D CAD/CAM/CAE System for Construction of Canoe Hull
Authors: Jeong Jae Hyun , Kim Heui Jung , Lee Syung Yul , Park Dong Hyun , Won Jong Pil , Moon Kyung Man
Published: September 2013

Generally canoes are the most popular boat in leisure activity on the water. Recently, its demand has been continuously increased, furthermore, the recent users hope that those canoes are high degree of quality, mass production and cheap cost etc.. For solving this problems, the wooden canoe manufactured by the strip construction method has been commonly used for leisure activity of various field. However, this method mentioned above is not suitable for mass production which needs a effective operation, managements as well as cheap product cost. In this paper, the new construction method, called the piling-up laminated construction method which is composed with new both 3D design system and manufacturing technology to satisfy all the canoe shape accepting previous user's various needs and the need of mass production is studied with using the laminated wooden plates. The manufacturing technology of the laminated plate kit type could be applied flexibly in both the mass production and small production by user's order. Furthermore, the laminated plate kit type compared to the strip construction method could be decreased to about 1/3 the time required for production, manpower and cost. Consequently, it could be verified that the laminated plate kit type was able to make a major contribution to improve the reliability of product.
Application of Grey Decision in Pool Game Pockets Choice
Authors: Yu Tien Kuei
Published: September 2013

Billiard is a kind of activity in sports science and recreational sports requiring intelligence and skills. The main purpose of this study is to design the robot that can automatically play the billiard using the image processing technology, decision analysis and mechatronics. The mechanical image processing system is to search the coordinate position of the billiards automatically by the CCD camera. The decision analysis of billiard robot is to determine the golf bag for the goal and the angle of the sub-ball crashed into the pockets quickly and correctly using the gray theory. In the end, it would output the result of the operation to the institutions of billiard robot, making sub-ball being crashed into the pockets accurately.The focus of this study is to locate the central position of the cue ball and the sub-ball on the table using image processing techniques, and then to make billiard robot follow the geometric distribution of sub-ball and the cue ball to decide the easiest bag to crash into by means of gray decision-making. Then make the correct decision on how to find the target golf bag when there is a cue ball and a sub-ball on the table, and on how to find out the easiest target goal of sub-ball with the ball bag and its golf bag when there is a cue ball and more than one sub-ball by considering the geometric relationship among pockets, sub-ball and cue ball. Finally, the results of the decision-making system are verified using experiments.
Production of Self-Compacting Concrete Using Rock Breaking Waste Residues
Authors: Nascimento Fabio , Gachet-Barbosa Luisa Andréia , Cecche Lintz Rosa Cristina , Russo Seydell Maria Rachel
Published: September 2013

Waste residues derived from the breaking process of rocks have been many times inadequately discarded on the environment generating an environmental passive. The residues could be used in the production of self-compacting concrete (CAA) providing more sustainable constructions. To study different CAA mixtures the following tests have been performed in the fresh state: Water Absorption, L - Box, V - Funnel and Slump Flow Test. For the evaluation of mechanical performance, the concrete Compression Strength Test, Flexural Strength Test and Tensile Strength by Diametric Compression Test have been performed in the hard state. Technical and environmental viability in the addition of this type of residue for the studied percentages have been verified.
Exploration of Modern Design Theories and Methods
Authors: Zhang Xiao Gui , Cai Ji Fei
Published: September 2013

The Modern Design Theories and Methods is an important core course for mechanical and electronic engineering graduate students. This paper carries out some useful exploration and experiments on the construction of a reasonable curriculum system, optimization of course content, and utilization of various teaching methods and means to improve the quality of teaching in the teaching of Modern Design Theories and Methods in accordance with the characteristics of college and the mechanical engineering discipline.
Numerical Simulations of Pressurized Elbow under Reversed In-Plane Bending
Authors: Chen Xiao Hui , Chen Xu
Published: September 2013

The paper compares numerical simulation with experimental results of pressurized elbow piping subjected to reversed in-plane bending in elastoplastic domain. The modified AbdelKarim-Ohno model is implemented into finite element program ANSYS by writing own user subroutine in FORTRAN language. The modified AbdelKarim-Ohno model may improve the prediction accuracy of ratcheting behavior of pressurized elbow under cyclic loading.
Synthesis of Compound Foaming Agent of Lightweight Foamed Concrete
Authors: Li Zi Cheng , Zhang Ai Ju , Li Zhong Qiu , Xiang Hui Qiang
Published: September 2013

The foaming agent used in lightweight gypsum-based foam concrete was discussed. The effect of the single-doped foaming agent, codoped foaming agent and ternary foaming agent on the settling height, bleeding volume and defoaming time of fresh foam were investigated. The results show that ternary foaming agent has potential synergistic effects for reducing settling height and bleeding volume and retarding defoaming time of fresh foam. While applying this new compound foaming agent to the manufacture of the lightweight foam concrete blocks, samples with better-performance were obtained.
Study on Preparation of Nanocarbon Black-Polypropylene Electric Conduction Composite Materials
Authors: Han Zhi Jia , Shen Sheng Fei , Li Zai Yuan
Published: September 2013

The paper has learned on the preparation of nanometer carbon black and polypropylene nanocarbon black-polypropylene composite material by using the small extrusion blending mixer which has been designed by our team. The results show that: Resistance of nanometer carbon black - polypropylene composites decreases with increasing carbon black content and extrusion mixing times. Through single factor experiment and orthogonal experiment to determine the optimum process conditions are at 260°C, nanocarbon black content 60%, extrusion mixing times 5. Under these conditions the resistance of nanometer carbon black-get polypropylene composites is 12.73 ohms.
Finite Element Analysis of Woven Fabric Laminates Structural Strength
Authors: Tong Gang , Liu Tong Fei
Published: September 2013

The characteristics of the woven fabric laminates structure is described. The steps and method of building the woven fabric laminates structure finite element model in MSC Patran is provided. The accuracy of this method is verified by a group of finite element calculation and experimental data.
The Interlaminar Stresses Analysis of Composite Laminated Plates Based on the Generalized Higher-Order Global-Local Plate Theory
Authors: Chen Wei Dong , Jia Ping , Li Jian Cao , Zhang Feng Chao , Yu Yan Chun , Lu Sheng Zhuo , Shao Lei
Published: September 2013

A generalized higher-order global-local theory was presented. The transverse shear stresses can be got directly through the constitutive equation without using the equilibrium equation. The second derivative of interpolation function was deduced. The hammer integration of triangular area coordinate method was applied to solve the multiple integration problem of the element stiffness matrix. The order choice of numerical integration was discussed and results obtained through two different integration orders were compared. The flow of how to compile a FORTRAN program was given. A moderately thick composite laminated plate was analyzed via finite element method (FEM) based on the theory and results were compared with that of Paganos three-dimensional elasticity. It shows that the interlaminar stresses are accurate for moderately thick laminated plates.
Experiment Study on the Effects of the Dehydration Methods on the Micropore Structure Characteristics of Bentonite
Authors: Yan Xiao Qing , Fang Ying Guang , Mo Hai Hong , Zhang Ping
Published: September 2013

As a natural nanomaterial, the bentonite is widely used in industry and engineering, and it is used in the anti-seepage (infiltration) project in civil engineer because of its low permeability. The micro-pore structure characteristics of the bentonite with the different dehydration methods are measured by Mercury Intrusion Porosimetry (MIP) in this text. Then the effects of the dehydration methods on the micro-pore structure characteristics of bentonite are analysed and the detailed reasons of the test errors are given. The results of the research have certain referential value for the application of the bentonite in civil engineering and play a guiding role on how to reduce the errors and to improve the authenticity and the reliability of the test.