bluuebunny/crossref_metadata_2025 huggingface dataset:
Stock Issue Price and the Entrepreneur’s Information Manipulation
Authors: Yu Xiao Qiang , Liu Shan Cun
Published: January 2012

Considering information asymmetry between the entrepreneur and external investors, this paper makes a hypothesis that the entrepreneur would manipulate information when issuing shares, and derives a stock issue price model based on information manipulation and effort the entrepreneur would make. Analysis of the model shows the level of information manipulation does affect the stock issue price. Market regulators should improve the capacity of identifying information manipulation and increase penalties for manipulators, so that the market can be more accurately pricing shares being issued.
The New Development and Application of Optical Sensor
Authors: Wang Bao Cheng , Wang Ping
Published: January 2012

In recent years, with the improvement of new technology and new material, optical sensor technology made a rapid development. This paper first introduces the theory of optical sensor, then expounds optical sensor technology will achieve much progress in optic material and important equipment field, optic material using by communication and parts of an apparatus and integrated technology field, acquired-information, dispose and utilize optic material field.
Microstructure and Recrystallization Texture Characterization of Cold-Rolled Dual-Phase Steel
Authors: Wang Zhi Gang , Zhao Zheng Zhi , Zhao Ai Min , Ye Jie Yun
Published: January 2012

Deep drawing dual phase steel was designed and trial-produced in the laboratory. The microstructure and recrystallization texture was studied using OM,TEM and XRD techniques. The results show that texture components typically in DP steels are γ (<111>//ND) and α (<110>//RD) fibers, which is partly attributed to the precipitation of Mo-based carbides in hot-rolled plate. Besides, {554}<225> and {332}<113> texture components are also founded in deep drawing DP steels, which are beneficial to improvement of drawability. With the increasing of annealing temperature, the tensile strength and elongation of DP steels are increased and decreased, respectively, and the r value is reduced slightly.
The Morphologies of Nano Carbon Growing In Situ by Catalytic Chemical Vapor Deposition
Authors: Xu Xian Feng , Hu Yan Yan , Xiao Peng
Published: January 2012

In order to improve surface characteristics of carbon fibers, using nickel granules as catalysts, nano carbon with different morphologies was deposited in-situ on the surface of carbon fibers by the method of Chemical Vapor Deposition (CVD). The observations by Scanning Electron Microscope (SEM) and Transmission Electron Microscope (TEM) indicated that keeping the excellent performance of plating nickels catalyst and a suitable deposition rate of Pyrogenation Carbon (PyC) are the key factors for getting Carbon Nanotube and Carbon Nanofiber (CNT/CNF). In this experiment, the optimum operation conditions are: plating time at 5min, deposition temperature at 1173K, deposition time at 2 hours, flow of C3H6, H2 and N2 at 30, 200 and 400ml/min respectively, deposition pressure at 700-1000Pa. Evolution rules of nano carbon are explained in growth mechanism of Catalytic Chemical Vapor Deposition (CCVD).
Research on Strategies of Networked Manufacturing Resources Configuration Based on Evolutionary Game
Authors: Zhan Yan , Lu Jian Sha , Ji Xue Hong
Published: January 2012

Economic theories of managing resources, traditionally assume that individuals are perfectly rational and thus able to compute the optimal configuration strategy that maximizes their profits. The current paper presents an alternative approach based on bounded rationality and evolutionary mechanisms. It is assumed that network node users face a choice between two resource strategies in real networked manufacturing resources configuration problem (NMRCP). The evolution of the distribution of strategies in the population is modeled through a replicator dynamics equation. The latter captures the idea that strategies yielding above average profits are more demanded than strategies yielding below average profits, so that the first type ends up accounting for a larger part in the population. From a mathematical perspective, the combination of resource and evolutionary processes leads to complex dynamics. The paper presents the existence and stability conditions for each steady-state of the system. A main result of the paper is that under certain conditions both strategies can survive in the long-run.
Double Qualified Teachers' Training Strategies and Approaches
Authors: Chen Xue Ping
Published: January 2012

This paper briefly describes the Double qualified teachers strategy for training, and analyses the double teachers team construction of all kinds of ways, Through analysis, so that we recognize the Double qualified teachers training is a systematic project, Needs government, teachers, school, industry, enterprise can realize common cultivation.
A Modified MPPT Method for Photovoltaic System
Authors: Huang Yu Shui , Wei Yan Jie , Chen Xue
Published: January 2012

The output of photovoltaic (PV) array is affected by the environmental factors such as irradiation and temperature, so an effective maximum power point tracking (MPPT) method of PV array is necessary. In this paper, a modified perturb and observe (MPO) method is proposed to achieve MPPT for a PV system and to improve the shortcomings of prior methods. Comparing with a typical perturb and observe (P&O) MPPT method, the MPO efficiency is improved in transient state by the proposed MPPT as theoretical prediction.
Dissolution Behavior of WC Reinforced Particles on Carbon Steel Surface during Laser Cladding Process
Authors: Zhang Zhong , Liu Hong Xi , Zhang Xiao Wei , Ji Sheng Wei , Jiang Ye Hua
Published: January 2012

Ni60WC35 self-fluxing composite coating was fabricated by transverse-flow CO2 laser apparatus on 45 medium-carbon steel surfaces. The microstructure and phase transform behavior of WC reinforced particles under the laser cladding conditions was investigated by X-ray diffraction (XRD), scanning electron microscope (SEM) and energy-dispersive spectrometer (EDS). The results show that laser scanning speed has a great important influence on the microstructure of Ni-based WC composite coating, WC particles has a transition to the Ni-based coating. The main feature of WC particle is its edge hard phase has transformed into needle phase, and the needle phase areas increase with the decrease of the laser scanning speed. Some WC particles turn into needle clusters structure, and then white block phase. In addition, WC particle has some microscopic defects, and the surface priority defect can be dissolved. When the pool temperature rises to 1250°C, WC decomposition reaction become W2C and C. The elements diffusion can promote the dissolution of WC particles when the pool temperature rises continuously.
Review and Prospect of Surface Modification of Kaolin
Authors: Ding Shu Li , Zhang Lei Lei , Xu Bo Hui , Liu Qin Fu
Published: January 2012

Surface modification of kaolin, which included coupling agent, calcination, acid modification and alkali activation, mechanochemical activation and intercalation etc, is reviewed. The modification mechanisms and modification methods of kaolinite are discussed. The application of kaolin in ceramics, paints, plastics and rubber etc are also analyzed. Afterwards, the prospect of future researches on modification of kaolin is taken. Surface modification of kaolin denotes use physical, chemical methods and mechanical method, which changes surface properties of kaolinite (surface functional groups, crystal structure and surface adsorption and surface electrical) to satisfy the requirements of the industrial application. Surface properties of kaolinite are controlled by the position of Si-O bonding and Al-(O, OH) groups. Any physical or chemical processing methods which may change Si-O and Al-(O, OH) bonding forms of kaolinite surface could complete the surface modification of kaolin. The surface modification of includes coupling agent, calcination, acid modification and alkali activation, mechanochemical activation, intercalation and so on.
Damage Mechanism and Fracture Process of Concrete Gravity Dam under Earthquake Action
Authors: Liu Jin Bao , Xue Jian Rong , Zhu Wei
Published: January 2012

Based on plastic-damage constitutive model of concrete, the developing process of damage domains is simulated for the earthquake analysis of concrete dam by taking account of the change of strain speed and stiffness degradation effect caused by material damage. The plastic-damage constitutive model is applied and the dam-reservoir dynamic interaction resulting from the transverse component of ground motion is modeled using the developed and generalized Westergaard formula added mass technique. Numerical simulation results show that the damaged domains mainly distribute at the change in geometry of upper part of the dam and vertical construction joints. The damaged domains of dam are same as the maximum tensile stress because the tensile strength of concrete is less its compress strength.
Renewable Energy Technology in Construction Ecological Residence of New Villages
Authors: Dong Hai Rong
Published: January 2012

Energy is an important material base to the live and development of human beings. To solve the lack of the renewable energy which maybe occurs, on one hand, we should advocate vigorously saving energy. On the other hand, we should explore more renewable energy actively such as solar energy, geothermal energy, wind energy, biological energy, etc. The method is to analysis technology using of solar energy and methane gas energy in this paper. Aim to come up with renewable energy technology using measures for the new rural ecological residential construction technical support and provide theoretical guidance.
Finite Element Model for Damage Detection in Three-Dimensional Cube Structures
Authors: Yan Wei , Li Wan Chun , Wang Wei
Published: January 2012

Based on three-dimensional finite element method (FEM), an accurate electro-mechanical impedance (EMI) model for a damaged cube structure is established in the paper. The damages are simulated by the reduction in Young’s modulus in the certain area of the cube structure. A coupled structural system consisting of PZT patch, bond layer and host structure is taken into account. Both the effects of the damage severity and damage propagation on EMI signatures are then investigated. The numerical computation indicates that the present EMI model can be employed to detect the damages in the structures.
Experimental Study on Additive of the Foam Technology for Dust Control in Underground Coal Mines
Authors: Ren Wan Xing , Kang Zeng Hui
Published: January 2012

The advantages of the dust control by foam are demonstrated, such as the high covering power, large contact area, high wetting speed and good isolation performance, which can control the dust efficiently. In consideration of wetting and foaming capabilities of the foam, a new kind of foaming agent with high foam expansion and wetting ability is developed after a large number of filtering and compound experiments by the ROSS-Miles method and water film flotation process method. After the experiments of the foaming ability and the wetting ability to different dust grains with different particle diameters, the results show that the new foaming agent can reduce the surface tension of solid and liquid materials rapidly with good foaming and wetting abilities. After the experiment of experiments, the best additive concentration of the new foaming agent is 0.5%, and a complete new experimental system is set up to produce foam, and the dust-control foam with high performance is produced using new foaming agent.
Remote Fault Diagnosis System for Water Cutter Based on GPRS
Authors: Wang Yan Qian , Zhao De An , Chen Bo
Published: January 2012

Remote equipment fault diagnosis is the combination of Internet technology, communications technology and machinery fault diagnosis technology. Based on real-time monitoring system and economic requirements, this article proposes remote fault diagnosis technology based on general packet radio (GPRS) network technology[1]. Based on this, and combined with remote fault diagnosis systems for high- pressure water cutter, the author described the composition and the specific implementation of each part. The system can play full advantages of the Internet to promote water cutter timely, correct diagnosis, and improve equipment utilization.
Research on Measuring and Controlling of Pose and Position Parameters for Roadheaders
Authors: Mao Jun , Qi Hong Liang , Xie Miao
Published: January 2012

A measurement method for the pose and position parameters of a roadheader is presented in this paper. The coordinates relationship between tunnel benchmark and roadheader body is established. Discrete model of intelligent walking of roadheaders is constructed. This paper also presents that the first condition of profiling cut for a roadheader is precise control of the parameters,meaning intelligent walking. Also the control method for the pose parameters of roadheader rectification is discussed, and the intelligent walking can provide parameters for the intelligent cutting, calculation shows that the measurement method is acceptable and the error of the pose and position is controllable.
The Static and Dynamic Characteristics Analysis of a CNC Grinding Machine Bed Made from Artificial Granite
Authors: Zhao Hong Lin , Ren Bi Wei , Huang Yu Mei , Zhang Guang Peng , Wang Bo , Mu Dong Hui
Published: January 2012

The machine tool bed is an important fundamental unit of the Machine tool, and its static and dynamic characteristics directly influence the precision of the Machine tool’s process. The precise composite B2-K3000 CNC grinding machine bed is made from artificial granite. Through entity modeling, adding the boundary conditions and stress conditions to the bed, this article analyses the static stiffness, natural frequency, vibration mode and harmonic response of the grinding machine bed, and masters the natural characteristics and preponderant natural frequency.On the basic of the bed’s structure characteristics and stiffness requirements, the original bed’s structure gets partial improvements. By increasing the number of ribs and using the cross-shaped ribs, the improved result indicates that the bed’s static stiffness can be enhanced obviously and the bed’s static and dynamic characteristics can be more excellent.
Experiment of the Rockfall Impact Characteristic onto Gravel Cushion
Authors: Tang Hong Mei , Wang Lin Feng , Chen Hong Kai , Wu Ren Jie
Published: January 2012

Rockfall is one of common geological disasters in the mountainous area. The experiment gained the impact waves for cushion soil mass contained 12density, 4 soil-rock ratio, 4 cushion obliquity, 3 moisture content, 3 rockfall quality, 5 height of rock fall. Used the wavelet theory to deal with the experiment waves, analyzed the experiment results: with rock’s mass, the height and density increased, the impact force is increasing, or the impact force is decreasing with the moisture content and cushion inclination increasing. The impact force spreads from the point of rockfall to all directions. The impact force data of the experiment is a little large than others, so this method provides a gist for choosing the prevention and cure measure for rockfall.
First-Principle Study of the Electronic and Optical Properties of Ti Doped ZnS
Authors: Chen Chang Peng , Xie Jian Xiong , Wang Jia Fu
Published: January 2012

Based on the density functional pseudopotential method, the electronic structures and the optical properties for Ti doped ZnS are investigated in detail. The calculation results indicate that the doping of Ti widens the band gap of ZnS and the Fermi level shifts upward into the conduction band. The impurity elements form new highly localized impurity energy level at the bottom of the conduction band near the Fermi level.,.Meanwhile, blue shifts are revealed in both the imaginary part of dielectric function and the absorption spectra corresponding to the change of band gaps.
Intelligent Grain Storage Measurement System Design and Research
Authors: Ren Gong Chang , Yang Yong , Guo Hai Chun
Published: January 2012

Grain measurement is an important aspect of grain depot monitoring, the system uses a laser sensor device and other equipments, the realization of the non-contact measurement based on a suitable mathematical model and security communication protocol dynamic,it can gets the real-time three-dimensional information of grain in dynamic、fast and accurate. Then according to the measured data, using multiple integral to get the volume of granary, volume multiplied by the proportion of grain, grain weight can be obtained.
Research on Risk Assessment of Reservoir by AHP-Fuzzy Comprehensive Analysis Method
Authors: Tian Lin Gang , Liu Zhi
Published: January 2012

Because of the fuzziness and uncertainty of risk factors in the risk management, using fuzzy comprehensive evaluation model for research. The model not only identifies the main risk factors of the dam, spillway, and water facility, but also quantifies the influence weight by risk factors on dangerous reservoir. The affiliate degrees of risk factors on risk level can be get on the basis of membership function. So the final overall risk level of the dam, spillway, and water facility is able to compare. It will be set the priority to reinforcement measures for dangerous reservoir.
Effect of Rainfall Infiltration on Loess Pitted Courtyard Cave Dwellings Stability
Authors: Han Jia Ming , Su San Qing
Published: January 2012

Baishe villagers have inhabited loess pitted courtyard cave dwelling for hundreds of years in Sanyuan County of China.The sizes of local cave dwellings are mastered by field measurements, and variational regularity is summarized of average annual and monthly rainfall. By the soil routine and triaxial test, the physical and mechanical parameter is acquired with loess samples in different water content.At the same time, based on the literature datas, the relationship is established between rainfall and water content. Then, the definition of safety factor is given for loess cave dwellings in different depths, making use of the expressions of the surrounding rock loop stress and the Mohr - Coulomb intensity criterion. In the end,the variation of stability of loess cave dwelling could be analysed under different rainfall.
Numerical Simulation of the Three Component Coefficients of Bridge
Authors: Huang Yi Feng , Yang Ji Xin
Published: January 2012

Numerical simulation has been carried out on the airflow field of bridge girder at construction state and completed bridge state under different wind speed and different wind angle of attack. The k-ε two-equation turbulence model is used in the numerical simulation by FLUENT. Variation of the three component coefficients can be obtained. The results show that drag coefficient and lift coefficient gradually becomes smaller and tends to stabilize, while pitch moment coefficient shows the trend of first increased and then reduced as wind speed increases. Drag coefficient and pitch moment coefficient does not change much and lift coefficient gradually becomes smaller with the change of wind angle of attack.
Liquid-Phase Oxidation Modification of Carbon Fiber Surface
Authors: Lu Wen Bo , Wang Cheng Guo , Yuan Hua , Hu Xiu Ying
Published: January 2012

The carbon fibers were subjected to liquid–phase oxidation treatment in 65% nitric acid solution. The relation between liquid-phase oxidation time and structure of carbon fibers had been assessed by LRS, XRD, SEM, and FTIR. The results indicate that smaller surface crystallites obtained by etching and more unsaturated carbon created after treatment, and corrosion enhanced with the increase of oxidation time. But nitric acid oxidation treatment does not change the bulk structure of carbon fibers. After nitric acid treated, the grooves of surface is wider and deeper compared to the original carbon fiber, When the oxidation times reach 12 hours, the surface of carbon fibers is severely damage. When the oxidation times reach 6 hours, there is not any characteristic peek in the FTIR. But after oxidation treatment for 9 hours, -COOH, -OH can be found from FTIR. So the best time for liquid-phase oxidation process is 9 hours.
Study on the Evaluate Methods of Comparative Test
Authors: Yu Xin
Published: January 2012

Accurate test dada is the basis of quality control in asphalt pavement construction. Comparative test is an important way to improve test operation level and guarantee the accuracy of test data. To check the condition of the SGC devices and the operator’s skill, comparative test was practiced. The test program and the analysis method to the SGC comparative test data was obtained in accordance with ASTM E691. According to the compaction degree data with SGC compaction at 100 times, two kinds of evaluate methods are compared. The results indicate that robust -statistical-method is more sensitive than ASTM E691-method.
The Field Study of the Remediation of Mud-Pumping
Authors: Fu He Lin , Li Kai , He Yi Wu , Zhu Xian Zhen
Published: January 2012

In this paper, we had a field test study in mud-pumping of the subgrade. During the experiment, from the process and the parameters, and based on the laboratory tests, a series of tests on the soil at the mud-pumping of the subgrade have been done before and after the improvement of the physical parameters.Studies show that the adopted materials, processes and parameters to be successful.
Mechanism Study of Arch Dam
Authors: Xia Yu , Zhang Zhong Qing , Ma Shao Kun , Zhao Xiao Lian
Published: January 2012

Through study of abutment force we can find mechanism of arch dam during process of overloading. It does elastic-plastic analysis by FEM, research shows that: arch dam abutment force first increase and then decrease from the top to the bottom of the dam.
Study on the Application of Catalytic Esterification Modification of Rosin
Authors: Luo Zhi Gang , Liu Zhao , Lin Jun Yue , Wang Qiang , Wan Cai Rong
Published: January 2012

Rosin is one of natural recycled resource which is rich in our country . Its mainly elements is tricyclic diterpenoid resin acid , rosin and disporportionated﹑hydrogenated rosin via esterification to overcome rosin itself existed many shortages,such as easy to suffer from oxidation,colour and luster unsteadiness,brittle,low softening point and expand rosin in many industry application scope . The research on rosin catalysis,esterification turning nature and the application of esterified products in the preparations of hot melt adhesives were reviewed in this paper based on the analyzing the studies in the field during the last decade, and has a prospect to the study .
Study on Microwave Curing Behavior and Performance of Epoxy/Versamid 125
Authors: Lei Yun Bo , Cao Xue Juan
Published: January 2012

The curing rate of epoxy/Versamid 125 (V125) by heating curing, room-temperature curing and microwave curing was compared. It is founded that applying microwave technology could effectively improve the curing rate and the curing time is only 3-4minutes. 140W microwave could cure the epoxy system in good condition, but 280W and 420W were easy to make the materials coking. The impact of diluent on mechnical properties of curing product were studied and it is showed that the impact strength increases and the impact ductility will be improved with the content of diluent increases, while the compressing strength, bending strength and tensile strength decrease.
Thermodynamics Software Development on Composition Prediction of Inclusions in Molten 430 Stainless Steel
Authors: Zhuang Ying , Jiang Zhou Hua , Li Yang
Published: January 2012

Thermodynamics software on inclusions prediction in 430 stainless steel was developed with Matlab and VC++. The inclusions’ composition could be predicted by composition of molten steel input, and equilibrium phase diagrams of MgO•Al2O3, 2MgO•SiO2, 3Al2O3•2SiO2 and 2Al2O3•2MgO•5SiO2 were displayed on the main interface simultaneously. The following predicted results by inputing experiments data at 1873 K can be gained that When Si content is 3.9×10-3and Al content is 3.5×10-4, MgO•Al2O3 spinel inclusions is unformed in case of Mg content with larger than 1.71×10-5; while MgO•Al2O3 spinel inclusions transformed into 2Al2O3•2MgO•5SiO2 inclusions in case of Mg content being less than 2.9×10-8. The predicted results of software fit well with the experiment results, Therefore, the software can provide some results for controlling the composition of inclusions in molten steel.
Experimental Study on Nitrogen-Spray Water Quenching for 9SiCr
Authors: Shao Bao Dong , Wang Li Feng , Cheng He Ming , Wang Rui Jie , Li Jian Yun , Li Zi Liang , Hou Li Jun , Hou Jie , Tian Chong , Ding Dong Fang
Published: January 2012

Alloy steel 9SiCr is quenched by a certain proportion of mixture gas of nitrogen and spray water at atmosphere, and the continual cooling curve during quenching is determined, the rigidity of quenched workpiece is measured and the metallographic map is captured. The results show that it can improve the cooling effect of quenching medium on the one hand; on the other hand, it can decrease the deformation and residual stress of workpieces. The results show that the rigidity of quenched workpiece is about 62 (HRC), which is corresponding with the rigidity after oil quenching. Martensite phase transformation occurs at the end of quenching that can be seen from the metallographic map.
Research on the Reaction of IPDI and PPG with Organo-Tin Mixed Catalyst
Authors: Wei Yuan , An Shu Lin , Liao Su Ran
Published: January 2012

The kinetics of the reaction is essential for the synthesis of polyurethane. In this study, the reaction kinetics and polymerization conditions in two-step process of isophorone diisocyante (IPDI) and polypropylene glycol (PPG) with organo-tin mixed catalyst were investigated by chemical titration. The results showed that the reaction obeyed the second-order equation of step-growth polymerization, the rate constants of IPDI and PPG reaction at 50, 60 and 70°C were 0.0161, 0.0373 and 0.0806 kg•mol-1•min-1，respectively. The activation energy obtained from the result was 74.25 kJ•mol-1. The polyurethane with number molecular weight 38721 was synthesized and was characterized by Fourier transform infrared (FTIR).
High Functional PET Sericin Composite Fabric
Authors: Zhang Gang Xian , Shi Xiao Hua , Hu Wei , Zhang Feng Xiu , Wu Da Yang
Published: January 2012

Though poly(ethyleneteraphthalate)(PET) fabrics have high initial modulus, outstanding creasability and wash-well character, but its hydrophilicity and biocompatibility are very poor. In this paper, the PET fabric was encased sucrose ester at high pressure and high temperature to endue it enough hydroxyl to grafting protein. The sericin was grafted on PET fabric by sucrose eater glycidyl ether (SEGE). The FT-IR spectra showed that sericin was grafted on PET fabric, and the structure of sericin was random coil conformation. X-ray diffraction spectra showed the structure of PET fiber did not changed. DSC showed the thermostability increased a little. After the PET fabric grafted with sericin, the hydrophilicity of PET sericin composite fabric was improved greatly, the cockle elasticity kept well, and the broken strength in creased a little. Certainly, the whiteness and air permeability decreased a little. The PET sericin composite fabric was high functional.
The Microstructure Transformation of 10CrMo910 Steel after Running 147000h in High Temperature
Authors: Wang Zhi Wu , Song Tao , Mei Wei , Wan Cheng
Published: January 2012

Two specimens from original 10CrMo910 steel and the steel after running 147000h in high temperature were analyzed in this research by SEM, TEM, XRD and electron probe. The results show that after running 147000h in high temperature the 10CrMo910 steel has changed a lot: 1) The dislocation and subgrain boundary in bainite decreased largely while that in massive ferrite almost disappeared. 2) The strip-shape M3C carbides were nearly dissolved, the granular austenite was gradually transformed into martensite, the fine needle-shape Mo2C carbides coarsened, and granular carbides separated out in massive ferrite. 3) There were large particles of M23C6 carbides in crystal boundary between bainite and ferrite, especially in the boundary of any three phases. And creep voids appeared.
Preparation of Cordierite–Mullite Composite Crucibles and Structure Characterization
Authors: Li Feng Feng , Du Jiao , Zhang Ming Xi , Yang Wei Chao , Shen Yi
Published: January 2012

Cordierite–mullite composite crucibles were prepared via high-temperature solid-state process by using burn talc, datong soil, knar clay, bentonite, quartz, feldspar and alumina as raw materials, waste porcelain powder as skeletal material. The main influencing factors such as the raw materials radio and calcination temperature were discussed. The microstructure of the sintered sample was analyzed with X-ray diffraction (XRD) and Scanning electron microscopy (SEM). The results show that the optimal prescription was sample II (13.34 wt% of burn talc, 10.496wt% datong soil, 40.65% knar clay, 15.00wt% waste porcelain powder,10.34wt% bentonite, 2.17wt% feldspar, 1.61wt% quartz, and 6.394wt% of alumina). The optimal sintered temperature was 1380°C and the holding time was 3 hours.
Numerical Simulation of Spraying and Jointing for Polyurea Spraying Gun
Authors: Li Bin , Zhao Jian , Sun Yong , Li Bao Hong , Tan Min Yao
Published: January 2012

Using CFD to simulate the flow field of impinging jet mixer in polyurea spraying gun,discussing the process of the spraying and jointing of the mixer after studying the profile of velocity and pressure.Spraying and jointing are available for the nozzle by changing the inlet pressure, the export velocity is slow under low pressure, so the outburst changes into a stream of flow and the jointing function is realized;while the export velocity is fast when the pressure is high,so the flow spray out to realize the spraying function.The distribution of the pressure and velocity within the mixer is extremely uneven,this is helpful for part A and part B mixing in the mixer.
Strip Casting of Al-25%Si Alloy
Authors: Haga Toshio , Harada Hideto , Kumai Shinji , Watari Hisaki
Published: January 2012

Strip casting of Al-25%Si strip was tried using an unequal diameter twin roll caster. The diameter of the lower roll (large roll) was 1000mm and the diameter of the upper roll (small roll) was 250mm. Roll material was mild steel. The sound strip could be cast at the speeds ranging from 8 m/min to 12 m/min. The strip did not stick to the roll without the parting material. The primary Si, which existed at centre area of the thickness direction, was larger than that which existed at other area. The size of the primary Si was smaller than 0.2 mm. Eutectic Si was smaller 5μm. The as-cast strip was ranging from 2mm to 3mm thick and its width was 100mm. The as-cast strip could be hot rolled down to 1mm. The hot rolled strip was cold rolled. The primary Si became smaller and the pore occurred around the primary Si after the rolling.
Influences of Pressure Conditions on Synthesis of Mg(Zr0.05Ti0.95)O3 Dielectric Ceramics
Authors: Tseng Ching Fang , Hsu Cheng Hsing , Huang Ci Jie , Lai Chun Hung
Published: January 2012

The microwave dielectric properties and microstructures of an Mg(Zr0.05Ti0.95)O3 ceramic system have been investigated. The compounds were prepared by the conventional solid-state route with various pressure conditions from 25 to 100 Kg/cm2 and sintered at 1420oC for 4 h. The structure and microstructure were analyzed using X-ray diffraction and scanning electron microscopy techniques. The Mg(Zr0.05Ti0.95)O3 had excellent dielectric properties: Q×f ~ 194,000 (GHz), εr ~ 17.9, and τf ~ -43 ppm/oC for the sample at 90 Kg/cm2.
Preparation and Properties of Sulfonated β-Cyclodextrins Used as Water-Reducer
Authors: Lv Sheng Hua , Gao Rui Jun , Li Di
Published: January 2012

Sulfonated β-cyclodextrin was synthesized with β–cyclodextrins (β-CD) and concentrated sulfuric acid. The molecular structure of sulfonated β-cyclodextrin was characterized by FTIR and 1H-NMR. The dispersing ability of sulfonated β-cyclodextrin was investigated using various characterization methods like paste fluidity, adsorption amount and zeta potentials measurements. The results show that compared with sulphonated naphthalene based superplasticizer (NPS), the fluidity of cement paste dosage with sulfonated β-cyclodextrin is 248 mm, the zeta potential value changes from 11.5 mV to-19.6 mV with the concentration of sulfonated β-cyclodextrin increasing from 0 to 15 g/L and the maximum adsorption amount is 20 mg/g. Meanwhile, FTIR and 1H-NMR results indicate that the sulfonic groups were grafted successfully on the molecular chain of the β-CD.
Study on the Stability of Alkaline Silica Sol
Authors: Wang Juan , Huang Yan Yan , Wang Ru , Sun Ming , Liu Yu Ling
Published: January 2012

The stability of slurry has a great effect upon the stability of polishing quality. At present the slurry of CMP includes SiO2 is applied in different fields respectively. But silicon sol is not enough to meet the requirement of CMP because of its instability. So the stability of silica sol is studied in this paper. It is known that the rate of coagulation depends mainly on the stability of the colloidal particles and that the solution pH and potential are the main factors affecting the colloidal stability. The stability of dispersion (the ability of the dispersion to resist coagulation) may be related to its kinetic stability, which in turn depends on the force barrier preventing collision between the particles and thus preventing their coagulation. The addition of surfactant can change the pH and the potential of silica sol. So o-20、JFC and PEG are selected to improve the stability of silica sol. The results presented here show that surfactant, PEG with low molecular weight, has a strong consequence on the stability of silica dispersion.
Air Base Damage Evaluation Using Cloud Barycenter Evaluation Method
Authors: Zhang Cheng , Shi Quan , Liu Tie Lin
Published: January 2012

Cloud barycenter evaluation method is applied to battle damage assessment for air base on basis of the establishment of the evaluation index system and damage level classification. The index system of battle damage assessment for air base is established and the application step of cloud barycenter evaluation method to air base damage evaluation is analyzed. The battle damage level of air base is achieved using weighted deflection degree which is used to demonstrate the deflection degree between battle damage and its perfect state. The correctness and validity of the proposed method is verified by the calculating result, which provide an efficient way for battle damage assessment.
Numerical Simulation of Temperature Field of Biomass Briquetting Based on ANSYS
Authors: Xing Lei , Liu Xiang Dong , Lu Wei
Published: January 2012

According to the forming mechanism of biomass, straw lignin contained in the compression molding process will be softened by being squeezed and fractioned. The softened lignin binder plays a role in prompting the material forming. Using thermal analysis module of ANSYS simulation of the heating temperature within the epigenetic material distribution, this paper verifies temperature curing factors on the impact of biomass, deduces the biomass of the cross-section inferred lignin softening and melting conditions for the molding process, finally, it provides a basis to determine the parameters.
Recovery of Mesoporous Silica from Waste Rice Husk Ash of Biomass Energy Industry
Authors: Zhu Wen Jie , Zhou Yang , Ma Wen Hui , Li Ming Ming , Yu Jie , Xie Ke Qiang
Published: January 2012

In this study, the mesoporous silica material was hydrothermally synthesized from the rice husk ash of biomass energy industry with cetyltrimethylammonium bromide (CTAB) as template agents. The structure and morphology of mesoporous silica material was investigated based on the analysis of X-ray diffraction (XRD), N2 sorption/desorption (BET), Fourier transformation infra-red spectrum (FTIR). The results indicated that mesoporous silica material was successfully prepared by substituting rice husk ash for the traditional silica source of tetraethyl orthosilicate, and the mesoporous silica material displayed pore sizes in the 2-4 nm range with specific surface areas as high as 363 m2/g.
Application of Frequency Conversion in Preparation of Semisolid A356 Alloy Slurry
Authors: Liu Zheng , Wang Fu Yong , Cao Kai , Xu Hong Biao , Huang Mei Yan
Published: January 2012

The semisolid A356 alloy slurry was prepared by low superheat pouring and slightly electromagnetic stirring (LSPSES). The effects of frequency conversion on the slurry were researched for energy-saving. The results indicated that it was feasible to prepare the slurry with particle primary phases by LSPSES. The application of frequency conversion technique into the preparation of the slurry by LSPSES was favorable to satisfying the requirements of rheo-forming and reducing the energy consumption.
Applications of Nanomaterials in Acupuncture and Moxibustion Instrument and Materials
Authors: Xu Yun Xiang , Jiang Cui , Chen Gui Zhen
Published: January 2012

By analyzing the relationship between nanotechnology and medical science, especially nanotechnology and acupuncture, the application of nanomaterials for needling therapy, acupoint catgut embedding therapy, acupoint external application, acupoint injection therapy, and meridian point diagnosis were discussed. Nanomaterials will make the development of acupuncture possess an unprecedented domain. It’s pointed out that breakthrough will be achieved from the research of the application of nanomaterials on the development of nano-needles for needling therapy, nano-thread for acupoint catgut embedding therapy, nano-medicine for acupoint external application therapy, nano-drug carrier for acupoint injection therapy, nano-sensor for meridian and acupoint diagnosis.
Preparation and Slow-Release Properties of Clay-Based Phosphatic Fertilizers
Authors: Yang Jin Tian , Pan Guo Xiang , Cheng Bin
Published: January 2012

With potassium dihydrogen phosphate acting as raw material, using grinding and adsorption methods to prepare diffrent kinds of clay-based phosphatic fertilizers. And later, using sodium alginate to coat the fertilizers. Choosing soil leaching method to evaluate their slow-release properties. The results indicate that carrier properties have great influences on slow-release properties, the effect of different carriers are as follows: bentonite > kaolin> common earth. The coordinated role of bentonite and hydrotalcite to the slow-release properties is better than the single role of bentonite. The coating of sodium alginate can improve the slow-release properties of clay-based fertilizers.
Effect of Sintering Temperature on Microstructure and Properties of VС/Fe Composite
Authors: Zhang Guo Jun , Sun Zhi Ping , Zou Li Yan
Published: January 2012

VC/Fe composite samples were fabricated by sintering at 1050, 1100 and 1150°C in vacuum. The microstructure and mechanical properties of samples were examined, and the relationship of structure and mechanical properties for VC/Fe composite sintered at different temperature were studied. The results show that fracture toughness, hardness and density is increasing obviously at 1050-1100°Cwith the increasing sintering temperature, but the growth trend increases slowly at 1100-1150°C; in whole process with temperature increased, Flexure strength heighten trend obviously. The microstructure of VC/Fe composite changed from particles piled up together to the microstructure particles closely, VC particles set gradually into Fe with temperature increased, and the gap reduced gradually.
Dynamic Character Study on Cool Thermal Energy Storage Process of Storage Tank for Air-Conditioning System
Authors: Li Xiao Yan , Wu Yan Yan , Cen Zhi Fen
Published: January 2012

Mathematical model of the storage tank for air-conditioning condition was established, the dynamics character of a new type of PCM in the storage tank was studied., and the model was numerical simulated by the method of heat capacity. Effects of flow rate and inlet temperature of heat transfer fluid (HTF) on charging process of the storage tank were obtained. The results show that no appreciable change in the total cold thermal energy storage is observed for the increase of flow rate, whereas the improvement of the total cold thermal energy storage due to the decrease of inlet temperature is detectable, when cold storage is finished during low peak of electricity, the best inlet temperature of storage tank is at 2°C-3°C.
An Energy-Balanced Routing Scheme Based on Prim Algorithm in Heterogeneous Wireless Sensor Networks
Authors: Li Han
Published: January 2012

In wireless sensor network, there are many hurdles takes place in providing quality of service routing to a desired level. The majority of routing protocols in wireless sensor networks concentrates on energy efficiency as a prime factor. Developing an energy–efficient routing protocol has a significant impact on the overall lifetime and stability of the sensor network. In this paper, we have considered three types of sensor nodes. Some fraction of the sensor nodes are equipped with the additional energy resources than the other nodes. We have assumed that all the sensor nodes are uniformly distributed. In the Heterogeneous WSN, we proposed an energy efficient cluster head election protocol and using the improved Prim’s algorithm to construct an inter-cluster routing. Simulation results show out method is more efficient to reduce and balance energy consumption and hence prolong the lifetime of WSN.
Algorithm of Continuous Power Flow Considering Auto-Disconnection of Large-Scale Wind Farms
Authors: Yang Ming Hai , Liu Chun Xiao , Wang Cheng Shan , Wei Wei
Published: January 2012

Voltage stability of power grid would be affected greatly by the connection of large-scale wind farms. Conventional continuous power flow method can not accurately simulate the system’s operation when wind farms are connected to power gird. A new continuous power flow method is proposed, considering auto-disconnection of large-scale wind farms. The step-size control segment is improved in this algorithm in order to simulate the operation characteristics of wind farm and determine the precise time when a certain wind farm is cut off.
Study of Fluxing Process for Hot Dipping Galfan Alloy on Steel Wire
Authors: Du An , Huo Yan , Hu Jie
Published: January 2012

Through the orthogonal experiment, research on the process parameters of the qualiity coating with the new auxiliary ,such as different pickled time, parched time, hot-dip time , and analyzed by scanning electron microscopy, X-ray diffraction. The results show that BiOCl is a new fluxing agent and the optimal parameters for pickled time, the parch time , hot-dip time, respectively,10s,120s,9s,through this we can get bright, smooth, corrosion resistant coatings
Stability Analysis of Shallow Stratum in Jiangshidi Nuclear Power Plant Site and its Surrounding Areas
Authors: Xie Qiu Hong , Liu Bao Hua , Li Xi Shuang , Yan Xiang Zhen
Published: January 2012

The differential GPS navigation and positioning technique, multi-channel shallow seismic exploration and high resolution single channel seismic technique were used for the geophysical exploration of the shallow stratum in Jiangshidi nuclear power plant site and its surrounding areas. Based on seismic data post processing results, the seismic section interpretation was performed, combined with regional geological background, borehole data and shallow anatomy data. Five main seismic reflection surfaces were recognized by using seismic stratigraphic method, and eight breakpoints were found according to the active fault discrimination criteria. Then the distribution and activity characteristics of main faults were obtained. The results show that any fault and marked deformation in the quaternary sediments has not been observed in the range of 5 km away from Jiangshidi nuclear power plant site. So the stability analysis results of shallow stratum in target area can meet the requirement of nuclear power plant site selection code.
Design and Performance Analysis on CO2 Combined System in Supermarket
Authors: Ning Jing Hong , Liu Sheng Chun
Published: January 2012

This paper reports a combined space cooling, space heating, water heating and food refrigeration system (named CO2 combined system) in supermarket. This system using CO2 as the working fluid consists of a two-stage CO2 transcritical cycle used for food refrigeration, a single-stage CO2 transcritical cycle for space cooling in summer and space heating in winter. The waste heat emitted from the CO2 gas cooling in food refrigeration cycle and space cooling and space heating cycles is recovered by heat recover exchanger and is used to provide hot water for space heating and for general usage, such as the catering, the washing and the toilet facilities in the supermarket. So this CO2 combined system improves the coefficient of performance, decreases the energy consumption as well as reduces the heat pollution. Moreover, this CO2 combined system is compared with typical conventional supermarket technology, the results show that the energy consumption of CO2 combined system is reduced largely and energy efficiency is increased obviously. It can be concluded that the CO2 combined system has a good future for protecting environment and saving energy.