bluuebunny/crossref_metadata_2025 huggingface dataset:
Effect of Dispersants Pre-Adsorption and Grinding on Dispersion Performance of Kaolin Pigment
Authors: Zhao Li Hong , He Liu , He Bei Hai
Published: August 2013

The solid content of kaolin pigment suspension used in paper coatings must be as high as possible in order to minimize the drying cost. X-ray photoelectron spectroscopy (XPS) analysis on elemental compositions showed that, the kaolin combined less dispersants possessed worse dispersion capacity. Therefore, the effect of pre-adsorption of organic or inorganic negatively charged polymers sodium polyacrylate (PAA) and sodium hexametaphosphate (HMP) on the dispersing performance of concentrated kaolin suspensions was investigated, moreover, the effect of pre-adsorbing with or without grinding processing was evaluated. It was found that the viscosity of PAA pre-adsorbed kaolin decreased considerably, probably due to the stronger electrostatic repulsion. And grinding treatment had a dramatical influence on the dispersing behavior of kaolin with PAA pre-adsorbed on, resulting in low relative viscosity at high solid content.
Prediction of Long-Term Properties of Fiberglass Pipe Based on the Shift Factors Method
Authors: Chen Jian Zhong , Li Zhuo , Zhu Si Rong , Li Zhuo Qiu , Kong Yue Lin
Published: August 2013

The design life of fiberglass pipe is 50 years. In order to ensure long service life of fiberglass pipe, long-term properties under service conditions is the most important performance. According to the polymer matrix composite material with viscoelastic properties, adopt equivalent principle and shift factors method combined with experiments to study the long term performance of fiberglass pipe, established a relatively simple for fiberglass pipes long-term performance prediction method. The experiments show that compliance of fiberglass pipe with all hoop winding increased by 148% after 50 years in 60% stress level.
Analysis of Technology Development Trend of the Wind Power Generation-Based on Patent Map Cluster Analysis System and Method
Authors: Chao Ke , Liu Jing
Published: August 2013

This paper through patent map fuzzy cluster analysis system and method, researches development status in the fields of wind power, and the patent technology focus areas and its own characteristics , putting an emphasis analysis on patent technology of wind power around the world , we summarize and generalize technology development trends , and the future technology identified methods of the patents focus areas are discussed. Finally, we put forward a idea which comes from technology identification to prediction and evaluation.
Capacitor Group Zero-Crossing Switching Control System Design
Authors: Wang Dao Shun , Zou Qiang
Published: August 2013

Nowadays, the most of the load is inductive load in the factory. However, power factor is reduced by the phase difference of voltage waveform and current waveform which made by inductor. So many company adopt the compensation mode of parallel capacitor. However, randomly switch for capacitor group make the great harm to power supply system. In order to solve this problem, this paper designs a kind of intelligent synchronous switch. This switch can be switched in the alternating current zero. This switch takes PIC16F877A as core, using of magnetic keeping relay as the executing agency. The experimental results show that the design of this system is reasonable and can make more contribute to enhance the transmission electric efficiency of electrical factory.
Development of Correlative Investigation Technique (CIT) of Human Performances in Specific Conditions of Postural Malfunctions
Authors: Baritz Mihaela Ioana , Cotoros Laura Diana
Published: August 2013

In this paper we present some theoretical and practical considerations concerning the development procedures of some correlative investigation techniques (CIT) applied to human performances analysis expressed in specific evolution conditions of some postural malfunctions. These integrated correlative techniques may define and control by feed-back reactions the behavior of some bio-systems or even of some automated and robotized systems.
Two-Dimensional Laser Detection Front End Circuit and Algorithm
Authors: Xing Can Hua , Zhang De Xiang , Zhao Tao
Published: August 2013

This paper describes the design of a two-dimensional photoelectric detector, in which silicon photovoltaic cells are used as photoelectric receiver, and laser signal is converted into electrical signals. The weak electrical signals can be amplified by the high power low noise with variable magnification amplifier controlled by single-chip microcontroller PIC. Then using the variable attenuator MAX521 complete selectable attenuation for the analog signal. The detector is able to adapt for high-precision detection of the laser light source in the case of changes in the strength of the near and far distances and light. The practicality and detection performance of the receiver can be ensured. This two-dimensional photoelectric detector is particularly applicable to the construction site where are special requirements for some installation accuracy, which can be a good solution to the problem of excessive error of the traditional installation process.
Node Localization Technology in Wireless Sensor Networks for Coal Mine Security Monitoring
Authors: Zhou Guang Xing , Yue Yun Tao , Li Ming Xue , Chen Yu Guang
Published: August 2013

This paper proposed a location algorithm based on nodes distance difference, it gets the distance difference from the blind node to every beacon node by wireless communication module Rf grouping, then, makes use of the improved Trilateral positioning method to work out Node coordinates, so as to realize the node localization of long-distance range, precision controlled, low-cost, and to analyze the positioning performance. The simulation experiments shows this algorithm has high feasibility and positioning performance, and it is also a complement of WSN Positioning technology.
Optimization Algorithms Used in Reservoir History Matching
Authors: Jiang Bao Yi , Li Zhi Ping , Zhang Cheng Wen , Wang Xi Gang
Published: August 2013

Numerical reservoir models are constructed from limited available static and dynamic data, and history matching is a process of changing model parameters to find a set of values that will yield a reservoir simulation prediction of data that matches the observed historical production data. To minimize the objective function involved in the history matching procedure, we need to apply the optimization algorithms. This paper is based on the optimization algorithms used in automatic history matching. Several optimization algorithms will be compared in this paper.
Research and Simulation of Image Histogram Matching
Authors: Zhao Wei Ping , Yang Jun , Li Yu Feng
Published: August 2013

This article according to the characteristics of the image enhancement and the histogram of the image properties, using genetic algorithms to improve the image gray-scale. Optimization process is to optimize the shape parameters of a normalized to unit interval doublet Gaussian function. The simulation results show that: the purpose of the image enhancement is pull the distance between object and image in gray-scale coordinates, proving the effectiveness of the methods. Lay the foundation for the binary image and target feature extraction.
Based on HMM Intonation Prosody Prediction of Tibetan TTS
Authors: Ying Zhao
Published: August 2013

This paper Analyze the features of Tibetan speech intonation, design the state of rhythm and observation of Tibetan TTS system, based on HMM the intonation forecasting model is given, and finally present to explore algorithm of the best rhythm state.
The Application of CRI Method in Fuzzy Reasoning
Authors: Xu Ying , Wang Hai Rong , Wu Yan Yan
Published: August 2013

The paper discuss the application of CRI method in the fuzzy reasoning in the following three aspects: (1) the influence of different implication operators on the classification result; (2) the influence of different shape of triangles on the classification result when fuzzying the example as a triangle; (3) the influence of different compound algorithms on the classification result. The paper presents the maximum information entropy methods to calculate the classification result for a given rule and compares the CRI method with the similarity-based method in the fuzzy classification problems. The experiments show that choosing proper parameters can make the classification accuracy obtained by CRI method prior to the accuracy obtained by similarity-based method. Thereby proves the validity of CRI method in the classification problems.
Design of Obstacle Avoidance Detection Based on Substation Intelligent Inspection Robot
Authors: Wang Hai Peng , Sun Yong , Xiao Peng , Luan Yi Qing
Published: August 2013

The obstacle avoidance system is an important part of the intelligent inspection robot. According to the special environmental requirements for substation inspection robot, the inspection robot obstacle avoidance detection system was designed. The system takes MCU as the controller core, selects many sets of ultrasonic sensors to detect the obstacle information around the robot, designs the transmitting and receiving circuit of the ultrasonic signal, and completes the system software program. In consideration of the substations effect of EMI to the electronic equipments, when designing circuit, using a large of filter circuit, improve systems anti-interference performance, realize real-time and veracity of measurement. Using on substation shows that the system run steadily, have high measurement precision, its important for improving the robot using on substation.
Study on Design Proposal of Computerized Numerical Control Machine Networking
Authors: Lei Zhang
Published: August 2013

At present, the majority of enterprise technology management and production management have entered the network era. The demand for people who are occupied in 3D product design, numerical control advanced engineering technology is gradually increased. In order to speed up the production development of factories, we need to greatly improve the productivity of CNC machine. Therefore, CNC networking and management is imperative. This article describes background of the implementation of the numerical network management as well as its necessity. According to the industry characteristics of design and manufacturing and production management, this paper analyzes proposals on the network management system of CNC and describes the main functions of the machine network system and the results after the implementation. The network system of CNC is to improve the productivity of CNC machine, and give references to the application of CNC machine networking in large machine manufacturing industry.
Sound Analysis and Synthesis for Audio Simulation System of Flight Simulator
Authors: Sheng Xiao Wei , Han Jun Wei , Hao Ming Hui
Published: August 2013

Through simulating the feelings of vision, hearing, motion and force during flight, the flight simulator can build a realistic flight environment on the ground. Therefore, Flight simulators have an important role in pilot training field. Audio simulation system is a key component of the flight simulator, it has direct impact on the realism and immersion of flight simulation. In this paper, we introduced the development procedure of audio simulation system shortly. Software implementation and its key development technology were mainly focused for expressing the necessity of extracting sound sources from original cockpit recordings. Based on the development method and practical recording conditions, we dicussed sound short-time Fourier analysis and synthesis technology, and sound linear prediction analysis and synthesis technology in detail. The objective of using these technologies was to extract sound sources from original recordings and this was also the preparation step of sound simulation.
Robust H∞ Control for Singular Networked Control Systems with Uncertain Time-Delay
Authors: Wang Jun Ru , Wang Hui Jiao , Zhou Bo
Published: August 2013

For singular networked control systems (SNCSs) with uncertain time-delay, the problem of robust control is studied.The SNCS can be modeled as a class of uncertain discrete linear system with uncertain delay. Sufficient condition, which ensures the resulted loop-system to be asymptotic stability with performance index , is derived.Furthermore, the explicit formation of dynamical output feedback controller is also presented.Finally, a numerical example is given to show the effective of the presented method.
Solar Energy Automatic Tracking System Based on Plane Normal Vector Control Research
Authors: Wang Shu Ying , Chai Suo Zhu , Hong Huan Bing
Published: August 2013

This article according to the characteristics of the normal vector plane method is proposed to motion principle, sunlight vertical cliff movement equation, designed a solar energy automatic tracking model, principle of the system to conduct a comprehensive analysis, gives the related transformation equation, the system motion control equation is established.
With DGPS-RTK Terminal Yard Cranes Real-Time Operating System
Authors: Zhong Wei Zhu , Wang Ya Ping , Lv Rong Sheng
Published: August 2013

This paper introduces the intelligent controlling solution of Yard Cranes (YCs, RTG) in the container terminal production process. The Computing, Communication and Controlling Technology (CCCT) play the important role in this port equipment rebuilding. The Terminal Yard Cranes Real-time Operating System (CYCROS) is able to solve the running trail yaw and working loose problems etc. The framework of Real-time Operating System and DGPS-RTK work principle in the solution as well as application case in Tianjin port are showed in this article.
A 100-MS/s CMOS Sample-and-Hold Circuit with Input Common Mode Feedback
Authors: Yang Jun , Deng Hong Hui , Zhang Rui , Yin Yong Sheng
Published: August 2013

A high performance sample-and-hold (S/H) circuit with input common mode feedback (ICMFB) is presented. The ICMFB is used to ensure that the input common mode voltage for the sample-and-hold amplifier (SHA) is maintained at a known value during the hold phase of operation in order to reduce the differential output error when the sample capacitor and feedback capacitor has mismatch. Meanwhile, bootstrapped switches are used to lower the switch on-resistance and reduce the effect of switch non-idealities. Then a low power two stage high gain wideband SHA is designed to guarantee the holding accuracy. Hspice simulated results based on SMIC 0.13μm 1P5M CMOS process under 1.2V supply voltage shows a 108.4 dB spurious free dynamic range (SFDR) at Nyquist input @Fs=100MS/s. The designed S/H circuit has been used in the front end of 14-bit 100MS/s Pipelined ADC adapted for single-ended applications.
Critical Evaluation on Steganography Metrics
Authors: Noroozi Erfaneh , Daud Salwani Bt Mohd , Sabouhi Ali
Published: August 2013

The objective of Steganography is to hide the information inside other data in order to avoid being spotted by the strangers. Steganography is an old-fashioned art that has been reborn in current years. This current paper provides a literature review on the security of Steganography organization and emphasizes on its measurements. The proposed algorithm introduces a novel hashing and encoding algorithm to generate a digital signature. Later, it has been embedded into the original data which doesnt require extra bandwidth for communication by signature.
A Provably Secure E-Cash Scheme with Loss-Tracing
Authors: Lian Bin , Chen Gong Liang , Li Jian Hua
Published: August 2013

E-cash should be spent anonymously in normal circumstances, while in many schemes, the trusted authority is the only one who acts as customer-tracer and e-coin-tracer for preventing illegal transactions, but it is not the case in the reality. In our practical scheme, the bank traces double-spenders without the help of others, and the trusted third party traces e-coins and the owner only when the customer is involved in crimes. When customers lose their e-coins for some reasons, the loss-tracing can be triggered in our scheme which is neglected by almost all existing schemes, so if the lost coins haven't been spent by anyone, the customers can get the refund from the bank. And then the security proofs for our E-cash scheme are provided in the random oracle model.
An Adaptive Tabu Search Method for Optimizing Procurement Plans under Correlated Demands
Authors: Zhang Xing Wen
Published: August 2013

In this paper we develop an adaptive Tabu search method to facilitate retailers in deciding procurement plans while facing correlated demands. The Tabu search method examines mul-tiple candidate moves in a single iteration, and randomly accepts one of the candidate moves based the solution quality and an adaptive probability measure. We vary the acceptance probability so that Tabu search is able to switch between intensification and diversification. The Tabu search method is compared against a Hillclimbing-based construction method, and computational results demonstrate that Tabu search performed significantly better than the construction heuristics.
Impulsive Synchronization of GREY-SCOTT System with the Cross-Diffusion Effect
Authors: Li Hong Yan , Yang Wan Li , Zhu Lian Jun
Published: August 2013

The impulsive synchronization of spatiotemprol chaos is investigated. A proof of the existence of a certain kind of impulses for synchronization such that the error dynamics is equi-attractive in the large is established. The numericle experiments validate the effectiveness of the results.
The Research on Deproteinized Techniques of Bio-Calcium Chitin
Authors: Zhang Rui Jie , Zhou Chang Ren , Li Li Hua , Liu Ming Xian
Published: August 2013

0Objective :This study is to retain the biological calcium in the crab shell, stripped of protein, calcium biological chitin chitin that is retained characteristics have unique biological calcium carbonate mosaic structure. the traditional preparation of chitin commoly adopts acid to remove calcium carbonae,applys alkali to extract protein, while inorgaic calcium salts is mixed with it as a source of calcium or an enhancement.Methods :Superfine pulverizing technology is used to smash crab shell to D50, which is 8.05 μm to get different size of crab shell powder through screen separation. The primary element of crab shell is calcium carbonate, chitin as well as protein. The content of protein is a significant indicator of industrial application of crab shell powder. Different size of crab shell powder is processed deproteinizedly,through hot alkali methodenzyme hydrolysis methodhot alkali method assisting microwave respectively. Results: Research result shows that the lower sizes of crab shell powder induce the higher effect of deproteinized processing method. The protein residual amount in crab shell powder of particle size D50 of 8.05 μm being processed in hot alkali for 3 hours is 0.097 %, while time being processed by microwave assisting is significantly reduced, making 20 minutes possible for the same result. Conclusions: Particle size of crab shell powder after superfine pulverizing is small, and deproteinization can be achieved by various methods, while retaining original chitin and biological calcium.
Optimization of Fertilizer Application for Dioscorea zingiberensis C. H. Wrights
Authors: Liu Wei Ming
Published: August 2013

Fertilizer application was optimized for cultivating medicinal plant Dioscorea zingiberensis (C. H. Wrights) in this study. The rotational orthogonal combinatory design was employed in selecting field parameters. The yield of D. zingiberensis and net production were used as the targeting function. A regression model was established. Through comprehensive analysis, the optimized scheme was proposed
The Research on Effects of Whitening Dentifrices on Superficial Roughness and Microstructure of Composite Resins
Authors: Li Miao , Zhang Rui , Zhang Yu Lin , Gou Xue Li , Si Qing Zong , Liu Bin
Published: August 2013

Objective: The aim of study is to investigate the composite resins superficial roughness and microstructure after brushing with common dentifrices containing silica abrasive agent or bicarbonate and whitening dentifrices containing peroxide. Methods: Roughness measuring instruments were used to test 3M Filtek Z350 samples surface brushed by the silica abrasive (C), urea peroxide + alumina / silica (RP), the hydrogen peroxide + calcium carbonate (Ex) dentifrices before and after, using AFM to observe the superficial properties. Results: The superficial roughness after using the three dentifrices changed differently, followed by EX<RPConclusions: Relative to dentifrices containing silica abrasive, whitening dentifrices containing peroxide and alumina or silica or calcium carbonate composition has smaller friction resistance of the composite resins.
ECG Signal Processing
Authors: Smolarik Lukas , Mudroncik Dusan , Ondriga Lubos
Published: August 2013

Electrocardiography (ECG) is a diagnostic method that allows sensing and record the electric activity of heart [. The measurement of electrical activity is used as a standard twelve-point system. At each of these leads to measure the useful signal and interference was measured. The intensity of interference depends on the artefacts (electrical lines, brum, motion artefacts, muscle, interference from the environment, etc.). For correct evaluation of measured signal there is a need to processing the measured signal to suitable form. At present, the use of electrocardiograms with sensors with contact scanning are difficult to set a time so we decided to use the principle of non-contact sensing. Such a device to measure the ECG was constructed under the project. The disadvantage of such devices is a problem with a high level of noise, which degrades a useful signal. The aim of this article is to pre-process the signals obtained from non-contact sensing. The contactless devices are powered from the network and battery. The electrodes were connected by way of Eithoven bipolar leads. Signals were pre-treated with suitable filters so that they are also appropriate for their subsequent analysis. In the filtration ECG signals was used as a method of linear (low pass filter, high pass, IIR (Infinite Impulse Response) peak, notch filter. The results of many signals clearly demonstrate removing noise in the ECG signals to the point that is also suitable for their analysis.
Research on Chemical Modification of Wood of Fast-Growing Poplar
Authors: Shen De Jun , Yu Chang Hai , Xing Zhen
Published: August 2013

This topic is considered to modify the fast-growing Poplar to improve the properties, in order to fully meet the performance requirements for the structural material. This study aims to improve the dimensional stability and some other mechanical properties through impregnated with the low-molecular-weight PF resin. Through design orthogonal test in different mole ratio of Formaldehyde and Phenol, different amount of NaOH and PVA, we make PF resin to impregnate Poplar and pressing into laminated timber to measure bonding strength, MOR, MOE. The study indicated that: the optimum conditions of the low molecular weight PF resin for modify Poplar are: mole ratio of Formaldehyde and Phenol is 2.4, mole ratio of NaOH and phenol is 0.05, amount of PVA is 3% of the phenol. Under this condition Poplar specimen got the biggest increase in various properties and it can satisfy the requirements of the outdoor wood structure.
Characteristic Properties of Marble and Brick Powders
Authors: Kirgiz Mehmet Serkan
Published: August 2013

The paper was incisive about marble and brick wastes problem. In Turkey, annual approximately 2 592 000 t marble waste and 3 800 000 t brick waste are turn out while marble and brick manufactures. These wastes are stored agrarian land so they are contaminated environment and terrain. Chemical, physical, and pozzolanic properties of the marble and brick powders described characteristic properties were helped whether to use them as mineralogical substitute or blend in cement or not. The aim of this study is to establish characteristic properties of marble and brick powders. Tekmar Marble Factory's marble powder and Kaman Brick Factory's brick powder were used as materials. Characteristic properties of the marble and brick powders were lie down via standard experiment methods known literature. Results show that the powders are compatible to add cement clinker or to substitute for cement to improve their properties.
Preparation of AucoreAgshell Nanosol and its Spectral Properties
Authors: Luo Yang He , Li Ji Shun , Yin Wen Qing , Liang Ai Hui
Published: August 2013

In the presence of stabilizer of citrate and 10 nm gold nanoparticles (AuNPs) at 90 °C temperature, stable AucoreAgshell nanosol was prepared by reduction of AgNO3 by citrate. It was characterized by UV-visible spectroscopy, resonance Rayleigh scattering (RRS) spectroscopy, and transmission electron microscopy. Results showed that the nanosol exhibited a RRS and surface Plasmon resonance (SPR) effect and the particle size is 20 nm.
The Strategic Choice of the Technological Innovation of Complex Product Systems in China
Authors: Lv Hai Jun , Wang Jing
Published: August 2013

The design and manufacture of Complex Product Systems in China have played an important role in our national economy, the innovation capability of Complex Product Systems gradually become the embodiment of national competitiveness. Only after in-depth understanding of the strategic choices of the technological innovation of Complex Product Systems in China, can the technology of Complex Product Systems achieve further improvement and development.
Copolymers and Proton Conducting Films Based on N-Vinylpyrazole
Authors: Lebedeva Oksana , Pozhidaev Yury , Sipkina Evgenya , Chesnokova Alexandra , Ivanov Nikolay
Published: August 2013

The copolymers of N-vinylpyrazole with vinyl chloride and methyl methacrylate were obtained by radical polymerization. Constants reactivity and microstructure parameters of copolymers were calculated and their properties were studied. The sol-gel synthesis of obtained copolymers with tetraethyl orthosilicate results in a hybrid organic-inorganic composites. Films with proton conductivity to 7.8·10-3 S·sm-1 were formed on the basis the copolymers and composites.
Evaluation of Catalytic Properties of Red Mud
Authors: Soldán Maroš , Balog Karol , Kobetičová Hana
Published: August 2013

Many industries, such as paper, plastics, food, cosmetics, textile, etc., use dyes in order to colour their products. The presence of these dyes in water, even at very low concentrations, is highly visible and undesirable. Since some of these dyes are toxic in nature, their removal from the industrial effluents is a major environmental problem. The objective of this work is to verify the catalytic activity of waste from metal production namely waste from aluminium production red mud for removal of methylene blue. This waste is still dumped on dumping ground and may be a potential environmental problem.
Enhanced Luminescence of Terbium Complexes with 2,3-Pyrazinedicarboxylate by Y(III) Doping
Authors: Wang Ai Ling , Zhang Hai Xia , Kong Kai , Li Huan Huan , Wang Hua , Chu Hai Bin , Zhao Yong Liang
Published: August 2013

Ten kinds of terbium doped inert yttrium complexes with 2,3-pyrazinedicarboxylate (2,3-pzdc2-) have been synthesized. Characterization results indicate that the complexes have the compositions of Tb (pzdc)1.55H2O and TbxYy(pzdc)1.55H2O (x:y=0.10:0.90; 0.20:0.80; 0.30:0.70; 0.40:0.60; 0.60:0.40; 0.70:0.30; 0.80:0.20; 0.90:0.10). IR spectra show that the lanthanide ions coordinate with the carboxylic oxygen atoms and nitrogen atoms of the ligands. Luminescence spectra show that the Y(III) ions can remarkably increase the luminescent intensities of terbium complexes. And Tb0.7Y0.3(pzdc)1.55H2O exhibits the strongest luminescent emission. Furthermore, the doped lanthanide complexes show longer luminescence lifetimes and higher quantum yields. The enhanced luminescence efficiencies of Tb3+ ions in the doped complexes may result from intramolecular energy transfer as well as the decrease of the self-quench of the Tb3+ ions induced by the doped Y(III) ions.
Microwave Dielectric Properties of Eu4Ti3O12 Ceramics via Sol-Gel Method
Authors: Li Zheng Fa , Li Dan Ping , Wu Wen Jun , Liu Feng , Li Yong Xiang , Si Ping Zhan , Ge Hong Liang
Published: August 2013

Ceramic powders with chemical formula Eu4Ti3O12 were fabricated by sol-gel method. A milk-white homogeneously mixed gel was prepared, and transferred into a porous resin intermediate through charring. Eu4Ti3O12 powders were prepared by calcination of the resin intermediate, and ceramic samples with two phases of Eu2TiO5 and Eu2Ti2O7 were got by sintering. Meanwhile, the crystal structure was determined by X-ray diffraction and grain character was analyzed by scanning electron microscope. Eu4Ti3O12 ceramics has good microwave dielectric characteristics: εr=27.51, Qf=9450 GHz, τf=211 ppm/°C.
Effects of Mg-Doping on Resistance Switching Property of MgxZn1-xO Thin Films Prepared by Sol-Gel Method
Authors: Wang Hua , Gao Shu Ming , Xu Ji Wen , Yang Ling , Qiu Wei
Published: August 2013

The films of MgxZn1-xO were prepared on ITO-coated glass substrates by sol-gel method at low temperature. The influence of Mg content x on microstructure and resistive switching behavior in MgxZn1-xO films was systematically investigated. It was found that all MgxZn1-xO samples exhibit a polycrystalline character with a single phase hexagonal wurtzite structure, irrespective of the Mg content x. With the increase of Mg content x, the Vset, Vreset, RLRS and RHRS/RLRS of MgxZn1-xO films increased, but the endure of MgxZn1-xO films switching cycles decreased as the Mg content x is over 0.2 and exhibited a smaller degradation of resistance as the Mg content x is 0.1. The resistance switching mechanism was discussed.
Initial Surface Reactions Mechanisms of Atomic Layer Deposition TiO2  on H/Si(100)-2×1 Surface
Authors: Zhou Guang Fen , Ren Jie , Zhang Shao Wen
Published: August 2013

The initial surface reaction mechanisms of atomic layer deposition TiO2 on H/Si (100 )-2×1 surface using Ti (OCH3)4 and H2O as precursors are investigated by density functional theory. The ALD process is divided into two half-reactions, i.e., Ti (OCH3)4 and H2O half-reactions. The adsorption energy of Ti (OCH3)4 on H/Si (100)2×1 surface is only-2.4 kJ/mol. The overall reaction of Ti (OCH3)4 is exothermic, which indicates that Ti (OCH3)4 half-reactions are favorable on thermodynamic. Howerver, H2O half-reactions are endothermic and thermodynamically unfavorable.
Improved Efficiency in Organic Light Emitting Device with a Excton Confining Structure
Authors: Yang Hui Shan , Wu Li Shuang , Pan Yu Zhuo
Published: August 2013

A white organic light emitting device (WOLED) with excton confining structure is reported. The blue and red emitting layer consist of 1,4bis (2,2-diphenyl vinyl) benzene (DPVBi) and the bis (1-(phenyl) isoquinoline) iridium (III) acetylanetonate [Ir (piq)2(acac)] doped into 4,4(-N,N)-dicarbazole-biphenyl (CBP) host, respectively. The devices were made of ITO/ m-MTDATA (40 nm)/ NPB (10 nm) /DPVBi (8 nm)/ Bhen (x nm)/ CBP: Ir (piq)2(acac) 2% 5nm/ Alq (50 nm )/ LiF (1 nm) / Al (200 nm), by adding excton confining layer, with only a small increase in operating voltage. However, the efficiency of device increases. The electroluminescent (EL) spectra exhibit two peaks at 456 and 628 nm, resulting in white light emission with the Commission Internationale dEclairage (CIE) chromaticity coordinates of (0.222, 0.2402) at 4V to (0.1924, 0.1986) at 13V when x is 8, while the device shows the current efficiency of 4.79 cd/A at 6V, its maximum luminance is 14130 cd/m2 at 13V, respectively.
Morphology, Dynamic Mechanical and Mechanical Properties of Long Glass Fiber Reinforced Polypropylene and Polyvinyl Chloride Composites
Authors: You Bang Sheng , Zhang Kai Zhou , Guo Jian Bing , He Li
Published: August 2013

The influence of long glass fiber (LGF) content on properties of PVC/PP composites were investigated by means of scanning electron microscopy (SEM), dynamic mechanical analysis (DMA), and mechanical properties. The experimental results demonstrate that long glass fiber could effectively improve the mechanical properties and storage modulus of PVC/PP. The DMA reveals good miscibility between PVC and PP. Based on SEM, good interfacial adhesion between matrix and long glass fiber in PVC/PP/LGF composites was observed. All results in this paper were consistent, and showed long glass fiber could effective influence the properties of PVC/PP, which were proved by the mechanical properties of the composites.
Synthesis of Mesoporous Polyaniline-TiO2 Composite Microspheres for Gas Sensing Application
Authors: Song Xiao Lan , Yan Cheng Yin , Huang Shu Tao , Zhang Ming Wan , Geng Bai Yang , Meng Rang Bin
Published: August 2013

The mesoporous polyaniline (PANI)-TiO2 composite microspheres were prepared by a facile hydrothermal method and characterized by X-ray diffraction (XRD), Fourier transform infrared (FT-IR), scanning electron microscopy (SEM) and Brunauer-Emmett-Teller (BET) surface area. The XRD pattern suggested that PANI did not modify the crystal structure of TiO2 whereas PANI exhibited amorphous state. The SEM of PANI-TiO2 displayed for microspheres. The gas sensitivity of the PANI-TiO2 hybrid was also studied. The as-prepared sample was sensitivity to ammonia and ethanol and showed good reversibility. The PANI-TiO2 hybrid material exhibits high sensitivity (0.96) to ammonia (150ppm) when operates at 373K.
A Multi-Scale Non-Deterministic Approach to Composite Curing Process Simulation
Authors: Carlone Pierpaolo , Palazzo Gaetano S.
Published: August 2013

Thermosetting matrix composite materials are often subject to a curing process to enhance the mechanical properties of the final product. In recent years computational models of the curing process allowed for a remarkable time and cost compression with respect to trial and error procedures. Most of the proposed models, however, rely on deterministic hypothesis. In this paper a multi-scale non deterministic approach to cure process simulation has been proposed, evidencing the effect of stochastic perturbations of fibers distribution on simulative results on macro-scale.
Preparation and Properties Investigation of Gadolinium Arylate/Hydrogenated Nitrile-Butadiene Rubber Composites
Authors: Hou Ya He , Zhang Xiao Ping
Published: August 2013

The gadolinium acrylate Gd (AA)3/hydrogenated nitrile-butadiene rubber (HNBR) composites have been prepared by in-situ reaction with dicumyl peroxide (DCP) as vulcanizing agent. The original morphology of Gd (AA)3 and its dispersion state in un-vulcanized and vulcanized rubber compound have been analyzed by scanning electron microscopy (SEM). The results demonstrated that Gd (AA)3 dispersed uniform in the composite with smaller size and better interface bonding because of the in-situ reaction. The mechanical properties of Gd (AA)3/HNBR reached the best when filled with 40 phr Gd (AA)3 and the X-ray shielding property increased with the increasing filling amount of Gd (AA)3.
SiO/C Composite Materials for Lithium-Ion Secondary Batteries
Authors: Wang Jing , Wei Jun Cong , Wang Chun Mei , Zhao Qing Qing
Published: August 2013

The SiO/C composite materials were prepared via a solution route and subsequent thermal treatment. The effects of carbon source on the particle morphology of composite, the graphitization degree of carbon component and the electrochemical performance of the prepared SiO/C composites were investigated by scanning electron microscopy (SEM), Raman spectrometer and electrochemical charge/discharge tests. The results reveal that the SiO/C composite synthesized with the epoxy resin as carbon source exhibits the higher graphitic degree and higher reversible specific capacity (~690 mAhg-1) and excellent cycling stability.
Effects of In Situ Formation of Magnesium Aluminate Spinel on Performance of Modified Sizing Nozzle
Authors: Yuan Guang Liang , Xue Qun Hu , Li Xiang , Yang Yuan
Published: August 2013

The modified sizing nozzle with excellent performances was successfully prepared by using of Mg,Y-PSZ as aggregates, Mg,Y,Ca-PSZ as fines, adding a certain amount of Al2O3-ZrO2 composite powders prepared by sol-gel. Effects of magnesium aluminate spinel in-situ synthesized in modified sizing nozzle on its performances were studied in this experiment. The results show that, the content of cubic zirconia in the sizing nozzle was decreased with the increasing of Al2O3-ZrO2 composite powders; the samples of modified sizing nozzle have no diameter-expanded after 30 hours service. The use effects are obviously better than that of Al2O3-ZrO2 composite powders free. The main reason is that a new bond phase magnesium aluminate spinel was in-situ generated through the reaction between Al2O3 in Al2O3-ZrO2 composite powders and the stabilizer MgO from partially stabilized zirconia in the sintering process at high temperature. The spinels embedded in the substrate of zirconia grow further and fill between zirconia particles. This prevents the stabilizer of CaO further desolventizing and also stop losing the eutectics formed by the reaction with compositions of molten steel. Therefore, the stability of zirconia and the corrosion resistance of the sizing nozzle were improved.
Preparation and Properties of Fluorinated Poly-Acrylate Emulsion with TPG as Co-Solvent
Authors: Deng Chang Yun , Xu Gui Long , Yang Jin , Hu Jian
Published: August 2013

Fluorinated acrylate emulsion was prepared in the presence of TPG as co-solvent, effects of TPG content to the polymerization stability and monomer conversion of the prepared emulsion was studied by the coagulation ratio and conversion rate, respectively. The hydrophobicity and oleophilicity of the polymer film was studied by water/oil contact angle. The chemical structure and morphology of the latexes was studied by FTIR and TEM observation, respectively. The results show that TPG has great impact on the stability of emulsion polymerization and morphology of the latex particles. The prepared fluorinate poly-acrylate emulsion has excellent water/oil repellency and thermal stability.
Correlation between Curing Temperature and the Properties of Conductive Composites
Authors: Wang Xiao Ya , Xia Zhi Dong , Li Zhe
Published: August 2013

This study was carried out to discuss the influence of curing temperature on the performance of conductive composites filled with nickel-coated graphite (NCG). The electrical conductivity, crosslink density, mechanical properties and tensile fracture morphology have been investigated. The results indicated that curing temperature had great impact on the electrical conductivity and mechanical properties. Voluem resistivity decreased from 43.1 to 0.08 ohm-cm at 125°C-205°C, and the reason was discussed in light of formation and break of the conductive network in the composites. The stability of SR-NCG cured at 165°C-205°C were also better than those cured at other curing temperature. Besides, tensile strength increased from 2.41 to 7.19Mpa at 125°C-225°C, elongation at break have a 56% increase, and Shore A hardness also incresed from 74 to 82.
First-Principles Calculation of the Electronic Structure of SrTiO3
Authors: Yun Jiang Ni , Yin Tieen , Zhang Zhi Yong
Published: August 2013

The electronic structure, band structure, density of states (DOS) and electronic density difference of paraelectric SrTiO3 in the cubic phase were performed by the first-principles calculation based on the density functional theory (DFT). The energy levels of high symmetry points in the Brillouin zone were listed and Mulliken population analysis was performed for valence bond structures. The top valence band of SrTiO3 is at the R point, and the minimum of the conduction bands is at the Γ point. The calculated value for indirect band gap is 1.84eV in the Brillouin zone. As in other perovskite ABO3 ferroelectrics, the population analysis, DOS and electron density difference show that there is a very strong hybridization between the Ti3d and O2p states in the valence bands, which is responsible for the ferroelectricity tendency.
Thickness-Modulated One-Dimensional Periodic Phononic Crystal
Authors: Xie Ya Zhuo , Qi Hai Feng , Zhao Min , Fang Hui , Gao Jian , Zhang Xing Gan
Published: August 2013

We have studied the dispersion curves of the thickness-modulated one-dimensional (1D) periodic phononic crystal. The dispersion curves of acoustic wave propagating perpendicular to the surfaces of the models are calculated based on the plane wave expansion (PWE) method. By compared the band gaps in thickness-modulated structure with the simple periodic structure, we have found that the band gaps in simple periodic model split into many sub-band gaps when the thickness of media layer is modulated periodically. This can be explained that the thickness-modulated structure can be considered to be made up of many periodic structures with different lattice spacing. It provides flexible choices for real engineering requirement.
Phase Change Materials Applied in Thermal Design
Authors: Yang Shu
Published: August 2013

Phase change material has been widely used in the fields of solar energy, aerospace, aviation, and buildings. In this paper, paraffin is applied in the thermal design of electronic equipment, in order to maintain a constant working circumstance. Finite-element analysis is implemented to analyze the feasibility of this thermal design.
Effect of Functionalized Multi-Walled Carbon Nanotubes on the Interfacial Properties of Ramie Fiber/Polylactic Acid (PLA) Composites
Authors: Zhou Nan Ting , Shi Xiang Bin , Sun Xiao Juan , Du Wei , Yao Lan , Qiu Yi Ping
Published: August 2013

Effect of functionalized multi-walled carbon nanotubes (MWCNT) on the interfacial properties of ramie fiber/polylactic acid (PLA) matrix was studied. Ramie fibers were respectively covered by the pristine MWCNT, carboxyl functionalized MWCNT and hydroxide functionalized MWCNT through the simple dip coating method. Scanning electron microscopy (SEM) results showed that all kinds of MWCNT were distributed on the fiber surface at random with some aggregations. Compared to the pristine MWCNT coated fibers with a water contact angle of 84.5 degree, the functionalized MWCNT coating made the fiber surface more hydrophobic. Polarization microscopy indicated that the functional MWCNT could provide the nucleation to form the intact crystalline structure of PLA on the fiber surface. Micro-bond tests showed that the coating of MWCNT on the fiber surface had no significant effect on the interfacial shear strength (IFSS).
Synthesis and Characterization of Novel Degradable Responsive Polyurethane Microsphere
Authors: Shan Lian Hai , Cui Yuan Yuan , Huang Shuai , Zhang Zhi Bin
Published: August 2013

The present study describes degradable polyurethane (PU) microspheres fabricated using toluene diisocyanate, polycaprolactone, polyethylene glycol, 2, 2-hydroxymethyl-2-propionic acid and triethylamine for drug delivery. The novel microspheres were synthesized using self-emulsion and condensed phase separation method. Fourier-Transform Infrared Spectrum analysis (FTIR) was performed revealing the chemical structure of polyurethane microspheres with special chains changing. Swelling properties influenced by solvent polarity, PEG content, PEG molecular weight, were evaluated, suggesting that the swelling ratio (SR) of PU microspheres increased with the increase in solvent polarity, PEG content and PEG molecular weight respectively.
Synthesis and Crystallization of Poly(butylenes succinate-block-butylene sebacate)
Authors: Kang Zong Hua , Wang Chang Lu
Published: August 2013

A series of aliphatic biodegradable poly (butylene succinate-block-butylene sebacate) (PBSuBSe) copolyesters were synthesized by incorporation of PBSe into the PBSu molecular chains. The molecular weight, crystallization behaviors and the crystal structure of the copolyesters were investigated by using gel permeation chromatography (GPC), differential scanning calorimetry (DSC) and wide angle X-ray diffraction (WAXD), respectively. The copolyesters might be potentially useful as the biodegradable materials.
Synthesis and Swelling Behaviors of Wheat Straw Cellulose-g-Poly (Potassium Acrylate)/PDMDAAC Amphoteric Semi-IPNs Superabsorbent Resin
Authors: Su Yuan , Liu Jia , Li Qian , Yue Qin Yan , Gao Bao Yu
Published: August 2013

A novel superabsorbent resin (SAR) which was called wheat straw cellulose-g-poly (potassium acrylate)/poly-diallyl dimethyl ammonium-chloride (WSC-g-PKA/PDMDAAC) semi-interpenetrating polymer networks (semi-IPNs) amphoteric SAR was synthetized by graft polymerization and semi-interpenetrating technology with the present of initiator and crosslinker. The effects of AA, PDMDAAC and crosslinker content on water absorbency of semi-IPNs SAR were studied. The semi-IPNs SAR prepared under optimized synthesis condition gave the best water absorption of 210.57 g/g in distilled water and 22.13 g/g in 0.9 wt% NaCl solution. In addition, the results showed that high water absorbency appeared from pH 4 to 9, and the effect of the salt ions in the swelling capacity was Al3+ > Ca2+ > Mg2+ > K+ > Na+.
Test Study on Combined Process of Clarification-Adsorption-Membrane Separation for Chemical Agent VX Polluted Surface Water Treatment
Authors: Wang Xiao Jie , Zhang Hong Wei , Chen En Feng , Ji Yun Zhe
Published: August 2013

t developed test devices and carried out test adopting combined process of clarification-adsorption-membrane separation targeted at surface water which was polluted by chemical agent VX. Investigation on purification effects of sand filtration, microfiltration, ultrafiltration, activated carbon adsorption and reverse osmosis was implemented in sections. It also researched on working principles of each section. Furthermore, comparative study has been made for adsorption performance of coaly granular activated carbon and that of shell activated carbon. The results show that the combined process can remove effectively simulation agent in water and the outlet quality complies with requirements of relevant standards.
A Tunable pH-Responsive Nanomaterials for Cancer Delivery
Authors: Liu Bin , Gao Guan Hui , Liu Peng , Yi Hu Qiang , Wei Wei , Ge Zao Chun , Cai Lin Tao
Published: August 2013

In this paper, we successfully designed a pH-responsive micelles based on hybrid polypeptide copolymers of poly (L-lysine-4-Azepan-1-yl-butyric)-b-poly (ethylene glycol)-b-poly (L-lysine-Diisopropylamide)-b-poly (L-leucine) (PLL(A)-PEG-PLL(B)-PLLeu) for efficient drug delivery. This pH-responsive nanoparticles were able to response to different pH values (pH=6.8 and 5.5). In vitro, these nanoparticles exhibited a stable and evenly distributed approximately 51 nm, a slightly positive potential about 10.3 mv at pH 7.4, which were crucial for the circulation of drugs in blood. While size and potential were about 130 nm and 34.7 mv at pH 6.8, which were good for drugs in membrane. Furthermore, the loading capability of DOX was up to 11.3%, and the pH-responsive release efficiency reached to 68.3% at pH 5.5. The results indicated that these micelles had huge potential application in cancer delivery.
The Basically Study on Arenga Engleri Fiber
Authors: Liu Xin , Wu Zhi Hui , Cai Chen Yang , Kuang Fu Chun
Published: August 2013

Arenga engleri is native to China, and widely distributed in southern China, which has a high economic value and development space. Through the initial test of arenga engleri fiber’s physical properties and chemical properties, we acquired the basic data and drew relevant conclusions.
Expression and Purification of His-chIFN-α and its Antiviral Activity Assay
Authors: Ma Yue , Long Min Hui , Diao Ai Po
Published: August 2013

In this paper, Chicken alpha interferon (IFN-α) gene was cloned into pUC19-His expression vector, then the recombinant expression vector was transformed into host bacteria E. coli BL21. The recombinant chicken IFN-α was induced to express by IPTG, then the protein expression was analyzed with SDS-PAGE. Under the condition that the recombinant protein was induced to express with 1 mM IPTG at 37 °C, the expressed protein was inclusion body. His-chIFN-α was purified by Ni-metal chelate affinity chromatography. His-chIFN-α was shown to inhibit the replication of Newcastle disease virus in CEF cells.