bluuebunny/crossref_metadata_2025 huggingface dataset:
The Calculating Method of Deposition Thickness of Viscous Debris Flow
Authors: You Yong , Lin Xue Ping , Liu Jin Feng
Published: June 2012

The deposition thickness is one of the most important parameters of debris flow. How to define the deposition shape along the viscous debris flow gully and how to calculate deposition thickness rationally were rarely studied in previous researches. This paper discussed the calculation method of deposition thickness of viscous debris flow based on theoretical deduction. Firstly, force analysis was carried out for a debris flow cell selected from the deposition. Then, the formula for calculating the deposition thickness of viscous debris flow was constructed based on deduction from the viewpoint of theoretical mechanics. At last, the deposition thickness under different slope gradients, yield stresses and densities was calculated based on the deduced formula. The results showed that the deposition thickness decreases with the increasing of the slope gradient and density, and increases with the increasing of the yield stress before the deposition thickness reaches to the maximum value.
The Reservoir Plane Heterogeneity Characteristics of the Number 2 of the Shanxi Formation in Changbei Gas Field, Ordos Basin, China
Authors: Wei Qin Lian , Xiao Ling
Published: June 2012

Reservoir plane heterogeneity means the geometry，the scale，the continuity and the plan variation of physical properties of reservoirs, which is one of the main factors influencing the injection-production in oil reservoirs. Therefore, the study of the reservoir plane heterogeneity play a great role in guiding development wells deployment，gas reservoir well nets adjustment and residual oil & gas development. The reservoir heterogeneity of the sandstone size of gas and the border, and unbalanced formation pressure because of the degree of the development of each well is uneven prevent ChangBei gas field to develoment. They cause difficulty of evaluating the gas field comprehensive，level development wells deployment and well trajectory adjustment，and lead to certain geology risk. It is necessary to study the reservoir heterogeneity of the number 2 of shanxi Formation in this block for concerning the unfavourable extraction condition. The composite index of reservoir plane heterogeneity of the number 2 of shanxi Formation in ChangBei gas field have calculated by adopting entropy method considering influcing reservoir plane heterogeneity which is porosity, tight sandstone, mutation coefficient and variation coefficient of permeability, range of permeability and interlayer frequency. The distributive maps of reservoir's plane heterogeneity under the restriction of sedimentary facies have also been drawed. The entropy method can full use of the reduction and strengthen of entropy method,which means the characteristic of removing the similarities and depositing differences. The study indicate that reservoir plane heterogeneity of the number 2 of shanxi Formation in study area presents the medium to slightly strong characteristics in general.
Influence of Pyrolysis Temperature on the Gaseous Products of Lignite
Authors: Zhou Chen Liang , Liu Quan Sheng , Li Yang , Teng Ying Yue , Zhi Ke Duan , Song Yin Min , He Run Xia
Published: June 2012

Temperature-programmed pyrolysis of SL-lignite from Xilinhaote was investigated. The solid and gaseous pyrolysates were analyzed by means of gas chromatography(GC) and X-ray diffraction(XRD). The weight percents of surface moisture, ash, C, H and S increase with increasing the pyrolysis temperature in solid pyrolysates, while the volatile matter is contrary. The cracking reaction occurs before 600°C, the consolidation reaction happens between 600°C and 650°C, while the polycondensation or secondary reaction appears after 650°C. Calcium sulfide is formed by the process of decomposition of calcium sulphates at 900°C. The solid pyrolysates become more graphitic with increasing the pyrolysis temperature.
Study on the Scale of Rare Earth Mineral Lands Reserve in China
Authors: Wang Ling Yun , Hu Nai Lian , Wang Xi Chen , Wang Jun
Published: June 2012

Rare earth is one of the most important strategic resources related to the national security and development. Nowadays, all countries over the world have a fierce competition on the rare earth. Although China has rich rare earth resource, the advantage decreases gradually due to various factors such as the technology level, waste of resource and so on. It goes against China's long-term development strategy of mineral resource seriously. So it is urgent to carry out rare earth mineral lands reserve system. In such background, according to the existing research results at home and abroad, this paper mainly summarizes the current supply and demand situation of rare earth in China, the conception and characteristic of mineral reserve, factors that affect the rare earth reserve scale, and then establishes a basic calculating model of rare earth mineral lands reserve scale.
Effect on Electrochemical Properties for Calcium Ions in Silica-Sphalerite-Mixture (Silica: Sphalerite =4:1) Systems
Authors: Ren Hao , Song Gui Lan , Ji Fei Fei
Published: June 2012

There is a remarkable interaction when fine particles adsorbed calcium ions in Silica-Sphalerite-Mixture (Silica:Sphalerite =4:1) systems, it is not conducive to mineral flotation. The key is how to reduce or eliminate calcium ions. This paper focuses on the changes of Zeta potential and Zeta potential distribution (ZPD) with the single minerals and complex mineral (silica / sphalerite = 4:1) in different concentrations of calcium ions, and interaction of particles was analyzed by Zeta potential and ZPD.
Development of Anodic Titanium Oxide Nanotubes Applied to a pH Sensor with Amperometric and Potentioimetric Methods
Authors: Lee Hsiang Ching , Zhang Li Fan , Lu Cheng Hsun , Lin Jyh Ling , Chin Yuan Lung , Sun Tai Ping
Published: June 2012

The purpose of this study was to develop the anodized titanium oxide nanotubes (ATONs) as a pH electrode with amperometric and potentiometric method. Titanium oxide nanotubes film was produced on pure titanium piece by titanium anodization at room temperature. The best one ATONs electrode has a linear pH response approximately 53 mV/pH with potentiometric method and 13 A/pH with amperometric method in the concentration range between pH 2 and 12.
Li+ Extraction/Insertion Reaction with LiMnTi0.25O3 Spinel
Authors: Jiang Jin He
Published: June 2012

Spinel-type metal compound [LiMnTi0.25O3], was prepared by a solid state reaction crystallization method. LiMnTi0.25O3 can be used to separate Li+ in the aqueous solution. The results showed that the Li+ extraction/insertion be progressed mainly by an ion-exchange mechanism. The acid treated samples had an ion exchange capacity of 4.0mmol/g for Li+
Film Properties of Poly(lactic Acid) Comprising N-Methyl-2-Pyrrolidone
Authors: Chitrattha Sasiprapa , Phaechamud Thawatchai
Published: June 2012

Poly (lactic acid) (PLA) has many potential uses, for example as packaging, textiles, biomedical fields, including suture, bone fixation material, drug delivery microsphere, and tissue engineering. However, PLA shows the poor toughness, slow degradation rate and relatively hydrophobic. The aim of this study was to investigate the ability of N-methyl-2-pyrrolidone (NMP) to improve the characteristics of PLA film. PLA films were prepared using a solvent casting method and their various properties were investigated. From tensile strength (TS), elongation at break (E) and young’s modulus (ε) determinations, the incorporated PLA films exhibited the softer behavior than plain PLA film. On the other hand, from the contact angle and surface free energy values, the PLA films incorporated with NMP could improve the wettability of solvents and also increased % water sorption (WS) and % weight loss (WL) than PLA films with NMP dose dependent. However SEM photographs revealed the more rather rough and cracked surface as the higher amount of NMP was incorporated in PLA film.
Photosensitization of Colloidal ZnO Semiconductor System with Hypocrellin A
Authors: Chen Xian Lan , Zhang Zi Yue , Zhang Ju Cheng , Liu Wei , Wu Na , Feng Shao Ping , Chen Wen Chang , Yang La Shi
Published: June 2012

UV-visible spectroscopy and fluorescence quenching measurements have been employed to study electron transfer from excited Hypocrellin A (HA) into the conduction band of a colloidal ZnO semiconductor. The adsorption of HA on the surface of ZnO colloidal particles and the electron transfer process from its singlet excited state to the conduction band of colloidal ZnO semiconductor were examined under experimental conditions. Exciting HA with visible light could induce electron transfer from its singlet excited state into conduction band of colloidal ZnO semiconductor. Adsorption of HA onto the surface of colloidal ZnO semiconductor extended its absorption spectrum further into the visible region, the quenching behavior were observed as the colloidal ZnO semiconductor was added and determined by fluorescence quenching method.
Plain Carbon Strip Q235 Grain Growth in Reheating Progress
Authors: Mo Chun Li , Du Shou Peng , Guo Xu Ming , Cui Lie Shan
Published: June 2012

Before hot rolling the ingot of plain carbon steel Q235 should be heated to austenite temperature to decrease distortion resistance. The grain size will affect the following hot rolling process. In this paper, the behaviour of Q235 grain growth in reheat furnace was studied with the method of physical simulation. To achieve the equation of grain growth in heating progress, the samples was carried out in different peak temperature and holding time at the Gleeble1500. With the kinetics equation grain size can be calculated and the results provide a basis for the setting of progress parameter during reheating of ingot.
The Effects of Nanocrystaline Cellulose on Polysulfone Hollow-Fiber Ultrafiltration Membrane
Authors: Wang Xuan , Bai Hao Long , Zhang Li Ping
Published: June 2012

Nanocrystalline cellulose was used to blend with polysulfone to improve the hydrophicility and mechanical properties of PS hollow fiber ultrafiltration membrane. The method of dry-jet/wet-spining was adopted to form the hollow fiber by the mechanism of phase-inversion. In addition, the content of NCC was increased gradually from 0% to 1 wt% to examin the permeation flux, rejection ratio of bovine serum albumin(BSA) and mechanical strength of PS hollow-fiber. We find that the pure water flux was soared when NCC content was increased. The tensile strength and elongation at break were also detected and calculated. The results indicated that the properties of PS hollow-fiber membrane with appropriate NCC content were enhanced. The hollow fiber membranes were also observed with scaning electron microscopy(SEM) to explore the porous structure
The Processing Parameters of Polyacrlonitrile Electrospinning Filament Assembly with Parallel Alignment
Authors: Lai Kan , Liu Cheng Kun , Chen Mei Yu , Sun Run Jun
Published: June 2012

Using polyacrlonitrile as spinning materials, the paper investigated the factors affecting the preparation of electrospinning filament assembly with directional and parallel alignment. The experimental results showed that, for different receiving electrodes, it is possible to obtain the spinning filament assembly with parallel alignment by adjusting the processing parameters of electrospinning; higher solute concentration and appropriate voltage control are helpful to obtain the spinning filament assembly with parallel alignment.
Differences of Nano-Structure between Waxy and Normal Starch
Authors: Liu Peng , Gu Cai Qin , Zeng Qing Zhu , Liu Hao Huai
Published: June 2012

This paper focused on the differences of nano-structure between waxy wheat starch (WWS), normal wheat starch (NWS), waxy maize starch (WMS), and normal maize starch (NMS). Observed by Atomic Force Microscope (AFM), it found that the nano-structure of waxy starch was composed by nano-particles and nano-chains. The nano-particles, which should be the remained crystalline region after the collapse of granules, were wrapped by nano-chains, which should be the dissociated amylose/amylopectin chains in amorphous region. But the nano-structure of normal starch was a little difference, namely only nano-particles could be observed. These distinctions changed the viscosity of starch pasting. That is to way, the viscosity of waxy starch pasting was higher than those of normal starch. The reasons for this should come from the interaction between nano-structure. Specifically, the interaction between particles was weaker than it between particles and chains. Therefore, the viscosity of waxy starch was higher than it of normal starch
Enhanced Electrochromic Performance of Sol-Gel Derived WO3 Thin Films Assisted by Electrospun PVA Nanofibers
Authors: Paipitak K. , Rattanarak J. , Pakdeeyingyong D. , Techitdheera W. , Porntheeraphat S. , Pecharapa Wisanu
Published: June 2012

The paper describes the results obtained on the enhanced electrochromic performance of Tungsten oxide (WO3) thin films assisted by electrospun PVA nanofibers. WO3 was fabricated by spin coating technique with tungsten powder as starting precursor. The effect of electrospun-PVA nanofibers layer on structural, chemical composition, surface morphology and electrochromic properties of the films were characterized by X-ray diffractometer (XRD), X-ray photo-emission spectroscopy (XPS), scanning electron microscope (SEM) and UV-VIS spectrophotometer. The XRD analysis suggested that the crystalline of WO3 can be identified as a monoclinic WO3 structure. XPS investigations also confirmed the existence of characteristic peaks of W. The significant enhancement of electrochromic properties of the films is achieved by additive electrospun-PVA nanofiber layer.
Development of Nano-TiO2 Coating on Titanium Alloy Substrate for Biomedical Applications
Authors: Liu Hua , Guo Li Qiang
Published: June 2012

Nanometer titanium dioxide powders were prepared by hydrolysis of titanium-tetrabutoxide with ethanol. The powder particle size of TiO2 in the structure of anatase-type is mainly between 5 and 10 nm. Using the process that titanium alloys were embedded by the nanometer TiO2 powders and sintered in the high temperature furnace, the nano-TiO2/titanium alloy biomaterials was fabricated out. The particle size of TiO2 particles on the surface of Ti alloy was mainly 50-70 nm. The method is a simple and adaptable technique for surface modification of the titanium alloys.
The Light Absorption Properties of Cu2S Nanowire Arrays
Authors: Ren Shan , Li Li Qiang , Liu Zhu Feng , Li Ming , Hong Lan
Published: June 2012

Cu2S nanowire arrays with different morphologies were prepared by solid-gas reaction between Cu foil and mixture gas of H2S and O2. Their microstructures were observed with XRD, TEM, and the optical properties were measured by DRS, PL and Raman. The results showed that the nanowire were Cu2S single crystal with a thin layer CuxO (x=1, 2) over the surface. The optical properties of the Cu2S nanowire arrays are related to the diameter, length, and distribution density of nanowire arrays. The thinner is the nanowire’s diameter; the bigger is the absorption of the visible light, and the absorbance begun to descend within infrared band. The absorbance of nanowire arrays with bigger diameter to the infrared light was stronger than that with thinner diameter. The photoluminescence spectrum (PL) indicated that band gaps of Cu2S nanowire arrays also changed simultaneously with the nanowire arrays’ structure parameters. The research demonstrated the Cu2S nanowire arrays’ potential applications in the photovoltaic cell and solar-heat harvesting area.
The Stability Study of Nifeviroc-Loaded Microemulsions
Authors: Zhou Hong Jing , Tian Fang , Xia Qiang , Chen Li , Li Wei Hua , Ding Xun Cheng
Published: June 2012

The objective is to study the stability of Nifeviroc-loaded microemulsions (Nifeviroc-MEs). The dilution stability of Nifeviroc-MEs with different loading capacity ( 0.1%, 0.2%, 0.3%) was tested by change of mean size, pH and appearance. The centrifugal stability was evaluated by comparing the mean size of Nifeviroc-MEs and dilutions before and after high-speed centrifugation for 30, 60, 120 min at 10000 rpm. The storage stability was evaluated by the change of appearance, the mean size, PDI and the retention rate of Nifeviroc in the ME. The pH, appearance, size analysis and retention rate results showed the Nifeviroc-MEs had good dilution, centrifugal stability and good storage stability without light.
Preparation and Characterization of Cellulose Nanowhiskers in N, N-Dimethylacetamide
Authors: Qu Ping , Wang Xuan , Zhang Li Ping
Published: June 2012

Reinforcement of polymer with plant whiskers is a way of improving mechanical properties. Cellulose nanowhiskers (CNW) were separated from commercially available wood pulpboard. Different microscopy techniques, thermal gravimetric analysis, X-ray diffraction were used to study the structure and properties of the microcrystalline cellulose (MCC) and CNW. Because of the high specific surface area of CNW, the increases in total amorphous character of the cellulose decrease the relative degree of crystallinity. After chemical and physical treatment, the CNW in the length of several μm and diameters ranging from 20 - 50 nm was obtained. Both the initial decomposing temperature and temperature of maximum decomposing rate of CNW is higher than MCC, but lower than wood pulpboard.
Preparation and Properties of Gd and Sb Doped SnO2 Conductive Nanoparticles
Authors: Liu Xiao Zhen , Chen Jie , Song Ling Ling , Ni Na
Published: June 2012

Gd and Sb doped SnO2 conductive nanoparticles were prepared by the coprecipitation method with SnCl4•5H2O, SbCl3 and Gd2O3 as the raw materials. The crystal phase and structure of the prepared conductive nanoparticles were characterized by FTIR, XRD and TEM techniques, respectively. The resistivity of the prepared conductive nanoparticles was 0.29 Ωcm; FTIR spectrum showed that the vibration peak are wide peak in 723 cm-1～451cm-1, the Gd and Sb doped SnO2 conductive nanoparticles have intense absorption in 4000 cm-1～1600 cm-1; Gd and Sb doped SnO2 have a structure of tetragonal rutile; complex doping is achieved well by coprecipitation method and is recognized as replacement doping or caulking doping; TME shows that the particles were weakly agglomerated, the size of the particles calcined at 800°C ranged approximately from 10 to 30 nm.
Resonance Suppression on Nanoscale Viscoelasticity Measurement
Authors: Xie Ping , Zhang Lei , Zou Qing Ze
Published: June 2012

During the broadband viscoelasticity measurement process, when the frequency of the excitation force become high relative to the resonant frequency or the bandwidth of the instrument dynamics, the adverse instrument dynamics is motivated, which causes the cantilever resonance and generates large measurement errors in the measurement data. To solve this problem, an approach to suppress the cantilever resonance on the broadband viscoelasticity measurement is proposed. Firstly, Atomic force microscope (AFM) system dynamic is analyzed by using a dynamic signal analyzer (DSA) in the z-axis. And a notch filter is designed as a prefilter of the AFM system to filter the input drive voltage in order to offset the resonance peak in the AFM model. Secondly, an adaptive filter based on LMS is designed to further eliminate the residual cantilever resonance effects on the complex compliance of soft materials, referring to the Hertz contact model. Finally, the proposed approach is illustrated by implementing it to remove the cantilever resonance effects on the broadband viscoelasticity measurement of a polydimethylsiloxane (PDMS) sample using AFM.
Cellular Uptake of PEGylated PLGA Nanoparticles in Hela Cells
Authors: Li Gang , Lin Dong Hai , Xie Xin Xin , Qin Li Fang , Wang Jun Teng
Published: June 2012

PLGA nanoparticles (PLGA-NPs) are being extensively studied as drug carriers for their controlled release, biodegradability and biocompatibility. This study evaluated the cellular uptake of PEGylated PLGA-NPs in Hela cells. MePEG-PLGA (5%-15%) was used to prepare PEG modified PLGA nanoparticles (PEG-PLGA-NPs), and the fluorescent marker DiI was encapsulated in the nanoparticles for the visualized analysis. The nanoparticles were characterized for surface morphology, particle size, zeta potential, and for cellular uptake by Hela cells. Results showed that PLGA nanoparticles were lowly cytotoxic and could be uptaken by Hela cells freely. PEG-PLGA-NPs had faster cellular uptake than that of nude PLGA nanoparticles, especially 10%PEG-PLGA-NPs. It suggested that the surface modification of PLGA-NPs by PEG notably improved the cellular uptake.
AFM Interaction Forces of Lubricity Materials Surface
Authors: Li Xue Feng , Wu Chu , Peng Shao Xian , Li Jian
Published: June 2012

Micro interaction forces of lubricity surface of silicon and mica were studied using atomic force microscopy (AFM). From different scanning angle and bisection distance of the AFM, a new method of measuring micro static friction of lubricity surface materials was investigated. Results show that the micro coefficients of static and sliding friction of mica are less than the silicon, but the adhesive force is bigger. The mechanism of friction force of the two lubricity materials was discussed.
Mathematical Modeling and Simulation Based on the Light Particles Doctrine
Authors: Shi Duan Yin , Zhang Xiao Peng , Du Hong
Published: June 2012

Gong Zutong academician guessed that the structure of the photon may be similar to the hydrogen atom which consists of a negative charge and a positive charge with the equal power, and the negative charge rotates around the positive charge in a spherical orbit. Based on this conjecture, to establish respectively the equation of photon movement for the dual-slit interference and single slit diffraction experiments. To get respectively the light intensity distribution model using complex integration method. Finally, to get that the width of the diffraction pattern of the conjecture is obviously wider than the results of Born through mathematical simulation in MATLAB software.
The Calculation of the Rotor Critical Speed of Turbopump
Authors: Wang Jun Feng , Sun Kang
Published: June 2012

With the rotor structure ofturbopump, using a one-dimensional finite element method, considering the mass of shaft, gyroscopic effect and influence of shearing deformation,establishedtheone-dimensional rotor dynamics finite element model, calculated its six rank of the critical speed, and compared the gyroscopic effect and mass of shaft to the influence of the critical speed turbopump, and the results show that, considering the mass of shaft there is a slight decrease of critical speed value, and gyroscopic effect on critical speed calculation has a significant effect, therefore, gyroscopic effect must be considered in the design of turbopumps.
Stress Analysis of Cross Wedge Rolling for Alloy Steel with Three-Dimensional Finite Element Simulation
Authors: Li Bin , Wang Hong
Published: June 2012

This paper investigates a three-dimensional finite element model for the cross-wedge rolling process has been used to characterize the workpiece material stress and deformation behavior. Considering the characteristic of cross wedge rolling, the static implicit FEM program is selected. To simulate all forming stages in the cross wedge rolling process, dynamic adaptive remeshing technology was applied. Examples of numerical simulation for strain, stress distributions and rolling load components have been included. The stress distributions in the cross-section of the forming workpiece are analyzed to interpret fracture or rarefaction at the center of workpiece. The computer codes in finite element method can be used for a large variety of problems by simply changing the input data.
Analysis about Application of Modal Bra in Summer
Authors: Chen Guang Lin
Published: June 2012

This paper will provide the basis of summer bra material comfort level design and production. To analyze modal and blending and interweave of other material based on clothing materials, this paper mainly through investing comfort level and wearing experiment in wearing bras of different material in summer, compare the related data of bra comfort level between Modal and other material. It also analyzes the changes of comfort level when modal material blending interweave of other material. And find the conclusion that the modal material is of highest comfort level.
Detection and Analysis of Stator Winding Inter-Turn Short Circuit Fault in Permanent Magnet Linear Synchronous Motor
Authors: Gao Cai Xia , Hao Chen , Zhao Yue Bing
Published: June 2012

A two-dimensional finite element model of PMLSM is build based on the finite element analysis software Magnet to research the diagnosis of stator winding inter-turn short circuit fault in PMLSM. The velocity, thrust, the stator current performance curve are obtained by simulation using Magnet when PMLSM is normal and under different extent inter-turn short circuit fault, the harmonic content of speed and thrust are analyzed using Matlab / Simulink , the conclusion that the thrust of the harmonic content is used as the Permanent Magnet Linear Synchronous Motor (PMLSM) stator inter-turn short circuit fault feature is proposed , which provided a basis for detection of stator winding inter-turn short circuit fault in PMLSM.
Study on Decolorization of Sugar Cane Juice Using Activated Carbons
Authors: Zhang Zhen Fa , Mu Guang Shan , Peng Jin Yun , Zhou Meng , Wen Hao , Zhang Xiao Lin
Published: June 2012

Sugar cane juice decolorization was studied using four commercial activated carbons. In an attempt to relate decolorizing performances to the characteristics, reaction time and temperature, the color removal capabilities of activated carbons were measured. The four commercial activated carbons showed different decolorization efficiencies, which could be related to their physical and chemical properties. The decolorization efficiency of powdered activated carbon was much better than the others.
Application of Hole by Hole Blasting Technique in the Foundation Pit Excavation
Authors: Fang Ze Fa , Hui Ming Xing , Yang Yi , Fang Nin
Published: June 2012

The excavation blasting is required for the rock pit of a steel plant in Huangshi city. Due to the chimmey and pool of in-situ concrete foundation are close to the complex environment blasting area, the small hole bench blasting, hole by hole blasting technique were adopted, the reasonable network parameters and millisecond delay time were investigated. Meanwhile the blasting hole was covered for protection. It is shown that the proposed solution can decrease blasting vibration but also control the fly-rocks. The rock blasting effect is favorable and the blasting purpose is achieved.
The Design and Implementation of Parallel Algorithm Accelerator Based on CPU-GPU Collaborative Computing Environment
Authors: Yang Fan , Shi Tong Nian , Chu Han , Wang Kun
Published: June 2012

With the rapid development of GPU in recent years, CPU-GPU collaborative computing has become an important technique in scientific research. In this paper, we introduce a cluster system design which based on CPU-GPU collaborative computing environment. This system is based on Intel Embedded Star Platform, and we expand a Computing-Node for it by connecting to high-speed network. Through OpenMP and MPI mixed programming, we integrate different algorithms meeting with the scientific computing and application computing by Master/Worker model and a software system which is based on RIA (Rich Internet Applications). In order to achieve high performance, we used a combination of software and hardware technology. The performance results show that the programs built with hybrid programming model have good performance and scalability.
Development and Application of Virtual Instrumetation Platform Based on Labview
Authors: Su Jun , Li Xiao Jing , Zhao Yan Ping
Published: June 2012

LabVIEW is a graphical programming environment used by millions of engineers and scientists to develop sophisticated measurement, test, and control systems using intuitive graphical icons and wires that resemble a flowchart. It offers unrivaled integration with thousands of hardware devices and provides hundreds of built-in libraries for advanced analysis and data visualization, all for creating virtual instrumentation.The paper discussed the main features of virtual instrumetation and listed the main industrial applications. The research and analysis is the key function of LabVIEW software and has been detailed summarized. Finally, the author discussed the future development of LabVIEW software.
System Design of PC-Based Automotive Electronic Control Failure Diagnosis
Authors: Xiao Zu Ming , Guo Zhan , Huang Xin Hua , Mei Li Xue
Published: June 2012

Current, overhaul equipments commonly used in vehicle maintenance have some disadvantages. How to design a diagnosis system easy to grasp and directly reflecting the cause of the failure has a strong value. This paper has designed a PC-based system for automotive electronic control system failure diagnosis. After the system inputs car output signal collected to the computer system, according to comparative analysis of the signal waveform by software, electronic control failure reasons can be diagnosed very conveniently.
Temperature Check and Control System Based on Micro Controller
Authors: Li Na , Guo Huan Yin , Mu Hai Fang
Published: June 2012

This thesis has designed a temperature control system which takes Micro controller Unit AT89S51 as the core. Temperature signal received from sensor DS18B20 is analysed by AT89S51. It adjusts temperature using relay heating wire and fan. 1602LCD display the current temperature value and buzzer could give an alarm. The system can detect and regulate temperature in real time. It contributes to production efficiency.
Research on the Optical Fiber Gas Sensing System Based on the Gas Concentration Measurement
Authors: Gu Bao Hu , Fang Ze Fa
Published: June 2012

At present , the catalytic combustion type gas sensors is still used in our country which is the extensive use of underground coal mine gas detection instrument , this kind of sensor slow response, calibration cycle is short, and the apparatus for the selectivity of methane is poor. Thus it can be seen that develop a safe and reliable, selective, high sensitivity of gas concentration measurement system that for mine safety operation, the personal safety and environment protection has a very important social significance and economic significance. Optical fiber sensing monitoring system according to the gas absorption spectrum principle with double light path structure on the mine gas online monitoring the concentration of the gas, has avoid the explosion, dust and so on many special advantages.
Recycle of Materials of Waste Mobile Phones
Authors: Lai Han
Published: June 2012

This paper introduces environmental pollution and damage to human health caused by materials of waste mobile phones, discusses the necessity of recycling materials of waste mobile phones, analyzes the value of recycling materials in waste mobile phones and researches methods of recycling high molecular materials and metal materials in waste materials of mobile phones. This paper also put forward suggestions for China’s current situation about recycling materials of waste mobile phones, aiming to realize the sustainable development of resources recycling.
Photocatalytic Degradation of Methyl Orange on Ce-TiO2 under Visible Light Irradiation
Authors: Duan Zhi Gang , Li Qin Yu , Zhao Xv Yun , Peng Zhi Ming , Zhang Shen Hua
Published: June 2012

In this article, the Ce-TiO2have been prepared by Sol-gel method to study the photocatalytic activity of Ce-TiO2photocatalyst.The effects of doping ratio on the crystal structure, Absorption spectrum and photocatalytic degradation of methylene were studied and characterized by X-ray diﬀraction and UV–visible spectrometer.The results indicate:with the increase of the CeO2doping content to TiO2, the absorption efficiency of the Ce-TiO2correspondingly increases. When CeO2doping content is 50%, the absorbing wavelength threshold value reaches the highest 520nm .The rate of degradation on methylene of the sample is higher than that of Degause P25 after 4h irradiated by sunshine. When the ratio is 11%, the degradation rate reaches the highest 87%. The paper systemical investigate the relationships between CeO2doping tatio, microstructure, and macro-performances of Ce-TiO2for the first time.These results provide guild for the future inductrical production of efficient photocatalyst.
Inverter of Hysteresis Current Control Basing on a New Single-Polar SPWM
Authors: Yan De Jian , Ouyang Hong Lin , Lu Zheng
Published: June 2012

Hysteresis current control can control the current’s changing by changing the state of the inverter’s switches, in order to realize to tail the given current quickly for actual current. Theory and experimentation of changing ring width constant single-polar hysteresis current control of the cascade inverter are proposed. In the last, the simulation and the output waveforms are given.
New Low Emissivity Coating on Cenospheres by Electroless Plating
Authors: Chen Yan , Cui Yi Bin , Ma Wen Xin , Wu Chun , Chen Li Yin , Ya Ping , Li Jing
Published: June 2012

Low infrared emissivity materials based on cenosphere particles are prepared by chemical electroless Ni-coating process. This metal/inorganic composites were identified by FESEM and XRD, It can be concluded that nickel coatings are formed on the surface of cenospheres by electroless plating.and infrared emissivity properties were discussed.
A Venation-Like Groove Structure of Vertical GaN-Based Light-Emitting-Diode Analyzed by the Monte Carlo Photon-Tracing Method
Authors: Hong Tu , Kang Jun Yong
Published: June 2012

A venation-like groove structure (VGS) is proposed to improve light extraction efficiency (LEE) of vertical GaN-based light-emitting-diode by reshaping the undoped GaN (U-GaN) layer. The light extraction characteristics of the venation-like groove structure are simulated and compared to the same electrode structure without grooves by the Monte Carlo photon-tracing method. It is found that VGS has a 20.3% enhancement on LEE at the chip size of 300 μm × 300 μm. The simulated LEE distribution pattern shows that VGS has advantages in brightness and uniformity compared to interdigitated-multi-fingered and square groove structures. These advantages are contributed to the partition and deformation in VGS.
Study on Numerical Simulation for Failure Process of Girder Bridge under Seismic Influence
Authors: Chen Hong Kai , Tang Hong Mei , Hu Ting , Hu Yi , He Xiao Ying
Published: June 2012

Based on the finite element analysis software Midas, it takes response spectrum analysis, and posts the failure mechanism and characteristics of Girder Bridge under intense earthquake. Through the seismic response spectrum displacement maps of Girder Bridge, it finds out that the abutment and foundation deformation is in evidence, especially the top of abutment foundation. Through the study of seismic internal force variation on girder and pier, it indicates that the longitudinal earthquake controls axial force, vertical shearing force and in-plane bending moment, transversal earthquake dominates transversal shearing force and out-planes bending moment. And it shows that the pier and mid-span section are seismic response sensitivity parts. The three parts, axial force, longitudinal shearing force and in-plane bending moment, becomes the controlling index of pier intensity. According to the seismic response spectrum displacement for pier and abutment, the transversal anti-seismic stiffness of pier is smaller than longitudinal one, longitudinal seismic force shows no effect on transversal displacement, and the transversal seismic force can augments longitudinal displacement. At the same condition, longitudinal seismic force changes the longitudinal distributing form of abutment and concaves it deeply, and the transversal seismic force can not change its shape, but augment its value.
The Design of the Vacuum Plastics-Absorption Mould for Fridge Freezer Inner Shell
Authors: Yuan Hong Ling
Published: June 2012

This article introduces the materials and structure characteristics of the freezer inner shell parts. On the basis of the design specification, it focuses on the analysis and design of components of the vacuum forming die—the vacuum holes, core-pulling mechanism, patrix ontology and so on.
Study on Water Absorption and Impact Properties of Vegetal Composites Material: Composite Structures
Authors: Abdal-Hay Abdalla , Jung Do Yeon , Lee Kang Il , Abdel-Jaber G.T. , Lim Jae Kyoo
Published: June 2012

The delamination and fibers pull out have been the main factors failure application of natural fibers in various engineering fields. To address these problems, particles reinforced composites are the promising candidate. The present paper investigates on vegetal particles (date palm seed particles/DPSp) and applies it as composites material reinforced unsaturated polyester (USP). The influence of alkali treatment on the surface morphology and structure of DPSp was investigated. They investigated by SEM and Energy Dispersive Spectroscopy (EDS) mapping. The water absorption results showed directly proportion with the particles loading as the relative increases were 0.645% and 7.345% for 10 wt% and 40 wt% of DPSp content, respectively. In addition, the water absorption ability of the composites showed low value comparing with many natural fibers. In addition, the fracture toughness of the composites was studied. Overall, addition of the proposed DPSp particles may be opens a new avenue to exploit the utilized natural cheap material to produce a green composite.
Study on the Deposition and Characterization of Nanocrystalline Diamond Composite Films
Authors: Ma Yu Ping
Published: June 2012

Nanocrystalline diamond composite films were fabricated on the WC-Co substrates using a bias-enhanced hot filament CVD system. Methanol solution pretreatment method for removing the Co in surface of WC-Co substrates was put forward. The composite structure was achieved by regulating the concentration of Ar in a mixture of acetone and a hydrogen gases in different stages. The surface morphologies, nucleation density, diamond films and composition of the nanocrystalline diamond composite films were observed with different techniques. The results showed that the introduction of Ar increased the second nucleation of diamond grains which made the diamond grains finer. Nanocrystallie diamond film can be successfully grown on the microcrystalline diamond films. The two-layer structure has the advantages of good adhesive strength and low surface roughness. Because of nano effects, the hardness of composite films decreases. This is prone to be polished and reduces the work load significantly. It is of great importance for the wide application of diamond films in the precision machining fields.
The Explore of Wood Residues Railway Sleeper Composite Aging Properties
Authors: Zhang Jian , Xiao Sheng Ling , Sun Yue
Published: June 2012

The experiment choose optimum technological parameter of wood residues railway sleeper composite to manufacture test pieces, select UV accelerated aging test method, use static bending strength (MOR), modulus of elasticity (MOE) , dry internal bond strength (D-IB) , wet internal bond strength (W-IB) and 24h absorbent thickness swelling (TS) and other performance index as reference standard, utilize DPS data analysis software to process variance analysis and regression analysis on the obtained data , analysis the UV accelerated aging effects on wood residues railway sleeper composite physical and mechanical properties
Study on the Performance of Photoinduced Orientation in Side-Chain Liquid Crystal Polymer Containing Chalcone Group
Authors: Yu Fan Fan , Jin Cao , Zhang Wei Min , Pu Jia Ling
Published: June 2012

In this paper, the photoalignment performance of the synthesized polymers was tested preliminarily and the photochemical reaction and the photoalignment at different conditions were discussed. The results indicated that liquid crystal molecules can rearrange because of the photo crosslinking of P1. The results show that with the increase exposure energy, the Abs and the degree of photochemical reaction is gradually stable and △A is always positive. All this shows that the direction of photocyclodimer is parallel to E vector of the LPUV and make the polymer film have an optical anisotropy.
Influencing Factors of Preparation of Copper Oxide Crystals by Precipitation
Authors: Sun Sheng Min
Published: June 2012

To prepare copper oxide crystals by direct precipitation with copper sulphate as the copper, sodium hydroxide as the precipitant,and ethanol - aqueous solution as dispersion system. Ultimately getting the optimum conditions of synthesis of the copper oxide by aging time, calcination temperature, pH values as three factors,and methylene blue degradation as the reference: the aging time was 30 min, the calcination temperature was 400 ° C, and pH value was 9. And using XRD, SEM for characterization testing of the product.
3D FEM Study on Magnetic Field in 320 kA Al Reduction Cells Based on Ansys
Authors: Wei Ji Jue , Lu Sen Kai
Published: June 2012

The magnetic fields in the 320 kA Al reduction cells have been calculated using ANSYS. The calculated results show that the magnetic field lines are concentrated in the cell wall; the magnetic fields in the Al reduction cell form a clockwise swirl along the Z-axis; the magnetic field strengthen in the corners; the vertical magnetic field value of the Al reduction cell is slightly higher. The range of BX, BY and BZ is -0.048~0.145 T, -0.046~0.292 T and -0.183~0.196 T in the Al of the Al reduction cell, respectively. The range of BX, BY and BZ is -0.183~0.348 T, -0.447~0.515 T and -0.350~0.225 T in the electrolyte of the Al reduction cell, respectively. The range of BX, BY and BZ is -0.020~0.035 T, -0.014~0.016 T and -0.015~0.028 T on the interface of melt of the Al reduction cell, respectively. The optimization design of the Al reduction cells should give full consideration to the influence of the ferromagnetic material
Investigation Progress on Microelectronic Materials: Carbon Nanotube and Graphene
Authors: Wang Guang Yin
Published: June 2012

In this paper, the structures and electrical properties of carbon nanotube and graphene were introduced, which have advantage in making microelectronic materials. The achievements and methods in construction of microelectronic devices were also discussed. In the last, how to make carbon nanotube and graphene were elaborated.
Prediction of CGHAZ Microstructure and Property of JG590 Steel with Weld Simulation Technology
Authors: Sun Jun Sheng , Sun Yi Qun , Jiao En Li , Wang Hou Xiao
Published: June 2012

A three-dimensional analytical calculation model of GMAW heat transfer was established, and the weld temperature field of JG590 with different welding parameters was analyzed by numerical simulation. The phase transformation in CGHAZ of JG590 steel was studied by physical simulation. SH-CCT diagrams, the effects of weld thermal cycle on microstructure, impact toughness and hardness were obtained. The results show that the critical cooling time of bainite, ferrite and pearlite appeared are respectively 8s, 110s and 150s. The critical cooling time that martensite takes to finish transferring is 35s. When t8/5 is below 10s, CGHAZ has a better toughness and when t8/5 is beyond 15s, there is a wide range decrease on the toughness. In this paper prediction of CGHAZ microstructure and property of JG590 steel was realized based on the analytical calculation model of GMAW heat transfer and physical simulated results mentioned above
Diode-Pumped Eye-Safe Intracavity Raman Laser with Ceramic Nd:YAG Gain Medium and BaWO4 Raman Crystal
Authors: Xu Hui Hua , Zhang Xing Yu , Wang Qing Pu , Chen Xiao Han , Wang Cong , Wang Wei Tao , Li Lei , Liu Zhao Jun , Cong Zhen Hua
Published: June 2012

A diode-pumped actively Q-switched eye-safe intracavity Raman laser with ceramic Nd:YAG gain medium and BaWO4 Raman crystal is demonstrated for the first time. The highest average output power of 0.76 W is obtained at a pulse repetition frequency of 30 kHz and a pump power of 11.3 W. The corresponding conversion efficiency from the diode pump power to Raman output power is 6.7%. The highest pulse energy of 38.1 µJ is obtained at a pulse repetition frequency of 15 kHz and a pump power of 7.8 W, and the corresponding peak power is 4.9 kW.
Effects of Annealing Temperature on the Structure and Properties of TiO2 Nanofilm Materials
Authors: Wu Han Shui , Wang Ying Lian
Published: June 2012

TiO2 thin films with good performance have been prepared by R.F. magnetron sputtering method on glass substrates. Surface morphology and UV absorption spectrum have been studied by XRD, SEM and UV-Vis scanning spectrophotometer. The influence of annealing temperature has also been discussed. The results show that, the films without annealing process present amorphous structure, the defects density of interior fiber is high and the structure is loose. With the rise of annealing temperature, the grain size increases, porosity decreases, and compactness is enhanced, at the same time, the film turns from anatase phase to rutile phase, quantum size effect is significant, surface energy reduces and absorb edge has red shift.
Nano Superfine Polymer Fibrous by Electrospinning and its Thermal-Switching Function
Authors: Xu Tao , Lei Hua , Wu Bin
Published: June 2012

Intelligent or smart polymer materials are those which are either “active” or responsive to a variety of environmental stimuli, such as changes in PH, temperature, ionic strength, or electric field, or the presence of a specific chemical substrate. Thermally sensitive polymer, poly(N-isopropylacrylamide)(PNIPAAm) base materials, has been of great interest because aqueous solution of PNIPAAm undergo fast, reversible switching around their lower critical solution temperature(LCST) of about 29-38°C(different with their structure). PNIPAAm chains show an expanded conformation in water below the LCST because of strong hydration and change to the compact forms above the LCST by sudden dehydration. , this is the reversible switching effect of hydrophilic to hydrophobic. These switchable materials may have wide applications in functional textiles, controllable drug release, and special fibers. And Electrospinning is a simple, convenient, and versatile technique for generating fibers with diameters that range from several micrometers to tens of nanometers.Herein, we report a electropun method to prepared nano PNIPAAm fiber and its thermal response also dected. With the rusults, the diameter of PNIPAAm nanofiber within respective system around 200nm and beads-less were successfully prepared by electrospun method fabricated in all cases and the reversible switching with LCST(32 °C) feature was also behaved clearly under fiber condition.
Research on Charge Transport in One-Dimensional Organic Semiconductors Material
Authors: Liu Wen
Published: June 2012

1D conjugated polymers belong to the family of organic semiconductor materials, in which the charge carriers are polarons or bipolarons. Charge transport in 1D organic semiconductors in the presence of high electric fields is studied within the SSH model. It is found that under a sufficiently high electric field, the polaron is dissociated into free-like electron. The electron performs Bloch oscillation (BO) in the organic semiconductors. By enhancing the electric field, BO will be destroyed and electrons can transit from the valence band to the conduction band, which is Zener tunneling in organic semiconductors. The results also indicate a field-induced insulator-metal transition.