bluuebunny/crossref_metadata_2025 huggingface dataset:
The Effects of Different Preparation Conditions of IR Catalyst on the Simultaneous Removal of Soot and NOx in the Presence of Rich Oxygen and H2O as Well as SO2
Authors: Gu Ting Kun , Zhu Rong Shu , Ouyang Feng
Published: January 2012

A series of Ir-supported catalysts were prepared by incipient impregnation method. The activity of Ir catalyst for the simultaneous removal of soot and NOx in the presence of rich-oxygen and H2O as well as SO2 has been studied, and the effects of calcination temperature, calcination time, calcination atmosphere, loading, carrier and precursor on its catalytic performance has also been investigated. Ir catalyst exhibits a high activity. With the calcination temperature increasing, Ir catalytic activity increases firstly and then decreases, and the optimal calcination temperature is 900°C. With the calcination time prolonged, Ir catalytic activity also increases firstly and then decreases, and the optimal calcination time is 3h. The optimal calcination atmosphere is 1.5vol.% H2/N2. Support material and precursor have a little effect on the catalytic activity, and the order is Ir/TiO2 > Ir/ZrO2 > Ir/SiO2 > Ir/Al2O3 > Ir/ZSM-5 and IrCl (CO)[P(C6H5)3]2/ZrO2 > H2IrCl6·6H2O/ZrO2 > IrCl4·4H2O/ZrO2.
ESR Study on Polyvinylidene Fluoride Doped with Transition Metal Halides
Authors: El Hefnawy Somia M.
Published: January 2012

The main goal of this research is studying the crystal structure and formation of both free radicals and trapped space charges in the pure and doped polyvinylidene fluoride (PVDF) films with various concentrations of transition metal halides TMHs (AlCl3, ZnCl2, and CoCl2). Electron Spin Resonance (ESR) was used to detect the existence of free radicals and the probable magnetic interactions between the halide and PVDF. The hyperfine splitting of the ESR was used to study the electronic structure of the existence radicals. Thermally stimulated dielectric response measurements have been made using Frequency Resolved Dielectric Spectroscopy (FRDS). This was useful for studying the formation and trapping of the space charge to enhance the results obtained by ESR. The new crystalline structures and the complex compounds which may be developed due to the chemical reaction between the polymer and the added halides were analysid.
Design and Implementation of Medical Image Teleconsultation System Based on Web
Authors: Chen De Yu , Jiang Zhi Lin , Yang Jia Jun , Zong Wu Yi
Published: January 2012

In telemedicine, real-time processing, processing without distortion, and browsing without plug-ins for medical image are these reasons that hinder implementation of medical image teleconsultation system. The paper presents a design of medical image teleconsultation system. The system is designed and achieved by comprehensive adoption of Silverlight, Deep Zoom, WCF and image processing technology. During the course of teleconsultation, real-time interaction, sharing and browsing for medical image meet the requirement for patients’ image information processing. Based on B/S, the system can achieve accurate locating, high-fidelity reduction and enlargement and quick browsing for medical image, and real-time interaction for consultation information through a universal browser.
The Research on the Measuring Based on the Digital Television Terrestrial Broadcasting Signal
Authors: Song Ke Xin , Wu Hai Tao , Xiang Yu , Li Shi Feng
Published: January 2012

Nowadays, the most prevalent method to measure the distance from the terminal to the receiver and to position the receiver is based on the correlation character of Pseudo-random-noise code (PN code) carried on GPS signal. And the basic of positioning is the measuring. However, the probability of the measuring with GPS signal in the metropolis area is almost equal to 0% due to it sheltered and interference. Launchers of digital television have already built in many cities of our country as the one fundamental establishment of metropolis. The sent signal from launchers is powerful in power, low in frequency and wide in bandwidth, and also covers absolutely entire city including many building dense areas. In this paper the signal frame structure of digital television terrestrial broadcasting (DTMB) standard of our country named GB20600-2006 is analyzed. Then the scheme measuring the distance with the special discontinuous PN code in the DTMB signal is designed. At last the practical distance from the terminal to the receiver in Xi`an is measured by this scheme. The analysis of the measurements is shown that measuring with this scheme is feasible. And it provides the technology basic to positioning and navigation especially in the metropolis.
10Gb/s RS-BCH Concatenated Encoder with Pipelined Strategies for Fiber Communication
Authors: Song Zheng , Hu Qing Sheng
Published: January 2012

This paper presents a 10Gb/s concatenated encoder compatible with the protocol of G.975. To achieve the high data rate, 8 RS encoders work based on the pipelined pattern. After the interleaving realized with 8 RAM blocks, the output of RS encoders are sent to 64 BCH encoders which work parallel. This concatenated encoder has been implemented in Xilinx Vertex5 FPGA, and the measurement results show that the data rate of 10Gb/b can be realized under the working frequency of 156MHz. About 9711 registers, 6984 LUTs and 40 Block-RAMs are utilized for the whole encoder.
Adaptive Beamforming for Noncircular Signals
Authors: Xu You Gen , Liu Zhi Wen
Published: January 2012

Many manmade signals have nonzero noncircularity coefficients such as those used in AM, BPSK, and ASK systems. They are called noncircular signals which have coexisted moment and conjugate moment at the second-order. This redundancy is herein exploited to derive a blind scheme for source separation and classification based on the NonCircularity REstoral (NCRE4) filtering. The present blind scheme has three major advantages: 1) involves only the second-order statistics (SOS) and has a faster convergence speed than the traditional high-order statistics (HOS) methods; and 2) does not require any a prioriknowledge about the content and/or direction of the signal-of-interest (SOI).
Soluble-Insoluble Self-Oscillation of a Novel Nonthermoresponsive Polymer Chain Induced by the Belousov-Zhabotinsky Reaction
Authors: Hara Yusuke , Jahan Rumana A.
Published: January 2012

In this paper, we investigated the effect ofthetemperatureand the initial concentration of sodium bromateon the soluble-insoluble self-oscillation of a nonthermoresponsiveself-oscillatingpolymer chain. The polymer chain consisted of Acrylamide (AM) main-chain covalently bonded to Ru (bpy)3as a catalyst of the Belousov-Zhabotinsky (BZ) reaction. The amplitude of the transmittance self-oscillation is hardly affected by the concentration of sodium bromate and the temperature.
Development of Processing Technology and Stability of Peanut Beverage
Authors: Zhao Xi Hong , Dai Xiao Hui , Zhang You Hong , Wang Peng , Xu Zhen Bo , Chen Xing Zhou , Chen Xiao Ping
Published: January 2012

Objective: To study the processing technology and formula of peanut–tea beverage, and further provide reference for the plant protein beverage. Methods: The peanut was baked in the far-infrared oven, soaked with soft water containing 5% NaHCO3, rinsed and then cooked for 30 min, milled at 0.05 mm spacing grinding, filtered and finished peanut slurry. Tea leaves were extracted twice by water of 90°C. The two ingredients were combined with other supplement, refined by colloid mill, homogenized twice, followed by bottling, sealed, sterilization, cooled and other processing. In this study, the formula, stabilizers and additives by orthogonal experiments were investigated. Results: The peanut slurry and sugar were found to be major factors which affected the beverage’s quality. The formula was optimized when the content of peanut slurry, tea and sucrose reached 75 mL, 25 mL and 4 g especially in per 100 mL peanut-tea beverage. As single stabilizer, CMC-Na showed the most significant effect, and storage temperature was found to be better at room temperature than low temperature. Compared with single stabilizer, compound stabilizer was better. The optimal formula was CMC-Na 0.4 g/L, seaweed sodium 0.2 g/L, gelatin 0.8 g/L. Conclusion: The peanut-tea beverage, with unique flavor and rich nutrients, was a novel type of health plant beverage which was suitable for a large variety of people, and had a promising market.
Research on Competitiveness Difference of Economic Cooperation Harbor City in Beibu Gulf Rim Based on the Grey Relation Comprehensive Evaluation
Authors: Zhang Hai Feng , Chen Yan , Pei Jin Ping
Published: January 2012

Through building the evaluation index system of economic cooperation harbor city competitiveness in Beibu Gulf Rim, by using grey relational comprehensive evaluation method, and taking evaluation and comparison in science for competitiveness of economic cooperation harbor city in Beibu Gulf Rim.The results show that the competitiveness of economic cooperation harbor city in Beibu Gulf Rim presents a unbalanced difference distribution of four large area which contains leadership group, challenge group, chasing group and lagging group, then relevant policy suggestions are respectively presented for competitiveness of four large area and cities.
HZSM-5 Zeolite Modified by Oxalic Acid and Photocatalytic Activity of Supported TiO2
Authors: Zhang Wen Jie , Hu Mei Ling , He Hong Bo
Published: January 2012

The oxalic acid treated HZSM-5 zeolite was used as support for TiO2 prepared by sol-gel method. Photocatalytic activity of the zeolite and the loaded TiO2 were studied. Decoloration on HZSM-5 under UV irradiation was quite small at even very high HZSM-5 concentrations. Methyl orange can be adsorbed on surface of HZSM-5, and the zeolite can subsequently have minor photocatalytic activity. TiO2 content in the supported TiO2/HZSM-5 is also a key factor influencing photocatalytic activity of the supported TiO2. The TiO2/HZSM-5 containing 60% of TiO2 showed the optimal activity for samples supported on every concentration of oxalic acid. The 0.3 mol/l oxalic acid treated HZSM-5 supported TiO2 has the maximum activity.
Preparation of Activated Carbon with Higher Absorbability from Anthracite
Authors: Yang Qiao Wen , Zhao Hui , Chang Jian , Wang Kun , Tao Luo
Published: January 2012

This paper studied experimental conditions of making higher absorption activated carbon from Jincheng anthracite. The result was obtained by using the orthogonal experiment in which four factors were designated: the carbonization temperature, the carbonization time, the activation time as well as the additive types, with the target of iodine value. The optimized parameters had been found out: the carbonization temperature is 600 °C，the carbonization time is 1.5 h, the activation time is 4 h and the additive is NaNO3 which is better in a weight proportion of 8 %. At last, under the optimized parameters, the better activated carbon products could be gained by acid pickling, which has a higher iodine value 1094.8 mg/g and low ash content 8.73 %.
Control Strategy of Microgrid Based on Distributed Generation
Authors: Zhao Yao , Cheng Ru Qi , Gong Xin , Zhao Geng Shen
Published: January 2012

Upon the traditional wind-solar hybrid distributed generation system,a single-phase microgrid experimental system platform has been built based on the DC bus,Z topology was used to increase the energy utilization ratio. On the basic of realizing the maximum power point tracker of the new energy, different microgrid controlling strategy has been designed to apply to the island and grid connected operation mode: in the cases of island running, master slave control mode will be utilized in the system and the battery will be used as the main control unit to provide the reference voltage; on the other hand, a control method which can merge the generation into the grid as much as possible will be adopted in the case of grid connected. By the use of system model, the simulation of the two operation mode switch state and power flow has been done and the feasibility and effectiveness of the control strategy can be guaranteed,it also has been verified by the microgrid experimental platform.
A Facile Synthesis of Carbon Nanobelts over Mo/Fe/MgO Catalysts
Authors: Xiong Yi Na , Chen Xiao Hua , Yang Zhi , Xu Long Shan
Published: January 2012

Carbon nanobelts(CNBs) with high purities (over 90%) have been successfully synthesized by catalytic decomposition of CH4 over Mo/Fe/MgO catalysts at 1173 K. The CNBs have thickness of about 8.0nm, width of about 50-200nm.with few defects and amorphous. It has been found that the addition of component Mo in catalysts plays a key role to synthesize the carbon nanobelts at high yields. The graphitic sheets increased with the increase of Mo content in catalysts.
Briefly Analyse Nowadays College Students' Psychological Health
Authors: Yang Jing
Published: January 2012

The development of society, progress of science, and the intense competitiveness are giving higher requirements on nowadays talents. College student, as a special social group, still has their own particular problems, such as how to adapt new study environment and assignments, how to adapt the study and the choices of majors, the conflict between their goals and reality, how to deal with the interpersonal relationship and the choices of their future careers etc. How to make them avoid or get rid of these mental problems caused by pressures above, to promote their mental health, and to adapt current developing social ambience with active, normal mental state, how to promote the education of mental health are becoming the issues that every college pays attention to and badly need to be resolved.
Reservoir-Forming Conditions Analysis of Shale Gas in Lower Paleozoic of Chongqing Northeast
Authors: Zhu Yu , Li Da Hua , Cheng Li Jun
Published: January 2012

Based on the literature research of the characteristics of domestic and foreign shale gas reservoir-forming conditions, in this paper we mainly study the development characteristics of organic-rich shale in Lower Paleozoic of Chongqing northeast, organic geochemical characteristics, reservoir characteristics, combined with geological survey and sample testing, analyse and study the development of shale, reservoir-forming conditions and distribution of shale gas to establish favorable target area and the resource potential prediction.
Fabrication and Microwave Characteristics of Fe3O4/C Composites
Authors: Wang Wen , Wang Cheng Guo , Guo Yu
Published: January 2012

Fe3O4/C composites were prepared by using Fe and polyacrylonitrile (PAN) as precursors, and then heat-treated at temperatures of 600,700 and 800 °C, respectively. The phase composition of the composites at different temperatures was analyzed by X-ray diffraction, and Fe reacted with O from PAN to form Fe3O4, which contributed to the improvement of magnetic loss of the carbon matrix. Electromagnetic and microwave absorption properties of the composites were investigated. The results show that the values of real and imaginary part of permittivity were all increased as the temperature increasing, and also the microwave absorption capability was improved.
Analysis of Impact to Counter Force and Internal Force in Different Arrangements of Minor Radius Curve Steel Box Girder Supporting Point
Authors: Sun Quan Sheng , Wu Tong
Published: January 2012

The designing course of curve steel box girder always needs to consider the city roads and buildings.It make the bridge position not only span the traffic below,but also avoid the house building all around [1].So curve steel box girders always have bigger span,smaller radius and the settled pier position.Also,because of the light weight and the prominent effect of bending-torsion coupling [2],the supporting points of steel box girder often suspend under the improper designing.It impact the safety of bridge vastly.Seriously it can make bridges topple.This paper take the designing course of a minor radius curve steel box girder as background to research change law of counter force and internal force of steel box girder in different supporting point arrangement.
Dually Responsive Multi-Network Hydrogel of N-Isopropylacrylamide Copolymeric Microgels Embedded in Poly(vinyl alcohol)
Authors: Ma Xiao Mei , Li Yan Hong , Xia Yan Zhi
Published: January 2012

To improve the performance of traditional hydrogels, dually responsive multi-network hydrogel was designed and fabricated in two steps. Firstly, temperature-and pH-responsive copolymeric microgel of N-isopropylacrylamide, methacrylic acid and polyethyleneglycol methacrylate were prepared via precipitation polymerization in poly (vinyl alcohol) (PVA) aqueous solution. Then glutaraldehyde was added to the microgel dispersion to build crosslinks among microgels and PVA, producing multi-network hydrogel with thermo-and pH-sensitivity. The morphology of the microgel and hydrogel was characterized by electron microscope technique. Swelling and deswelling behaviors show that the obtained hydrogels exhibit good temperature-and pH-sensitivity. The hydrogel shows rapid deswelling kinetics and approaches deswelling equilibrium in ~30min.
Research on Performances of Hybrid Actuation System with Dissimilar Redundancies
Authors: Yu Li Ming , Ye Zi Qing
Published: January 2012

Hybrid actuation system (HAS) with dissimilar redundancies conforms to the development trend of future actuation systems in more electric aircraft (MEA). Hybrid Actuation system is composed of a traditional servo valve controlled hydraulic actuator (SHA) and an electro-hydraulic actuator (EHA). It has two operating models, active/passive mode (A/P) and active/active mode (A/A). In A/A model both actuators are actively controlled. Corresponding to A/A model, SHA is actively controlled and EHA is passively controlled in A/P model. The hybrid actuation system is built in the AMESim simulation environment, comparative analysis is performed when system operates in these two modes, such as signal response and force fighting. The simulation results provide a guideline to determine the specific operating mode of the system in different circumstances.
Optomechanical Design and Analysis for Rotating Telescope Optical System
Authors: Zhao Long Cheng , Fu Yu Tian
Published: January 2012

Based on system technical specifications,we established optomechanical design and analysis for a rotating telescope optical system. Firstly, modal analysis was done for the main optical barrel. Secondly, Analysis on the changes in MTF caused by changes of temperature was finished, and obtained the MTF trend corresponding to changes of temperature for two different materials. Finally, Analysis on the changes in MTF caused by rotating performance based on experimental data was done and proposed the requirements of rotating performance based on MTF. Through the above analysis, it is proved that the structure of rotating telescope optical system can achieve the requirements of original optical design.
Study on Damage Capabilities of Multiple Hulls Structure under Underwater Explosion
Authors: Zhou Fang Yi , Jiang Tao , Wang Wei Li , Zhang Ke Yu , Zhan Fa Min
Published: January 2012

In order to study the damage capabilities of multiple hulls structure under underwater explosion, the damage mechanism of contact blasting and noncontact blasting on target is analyzed, and the formula of shock wave in water goes through multiple hulls structure is put forward. Using armor plate and aluminum plate、copper plate、rubber plate as models respectively, numerical simulation is done by LS-DYNA, the stress distribution and displacement of multiple hulls structure under underwater contact blasting are got. Lastly, test research on damage capabilities of multiple hulls structure under underwater explosion is finished. The result shows that the anti-explosion capabilities of multiple hulls will improve greatly when underwater ship adopted this kind of structure.
Electrical Resistivity of Rubberized Cement-Soil in Formidable Environment
Authors: Wang Feng Chi , Zhou Yu , Zhang Man Yuan , Yin Xiao Jun
Published: January 2012

Based on experiments of salt corrosion, freeze-thaw cycle and co-action of salt corrosion and freeze-thaw cycle, the electrical resistivity of rubberized cement-soil in formidable natural environment were studied. Under the environment of salt corrosion and freeze-thaw alone, with the increasing of rubber powder content, the electrical resistivity rises at first and then falls down. But under co-action of salt corrosion and freeze-thaw cycle, the electrical resistivity shows descending trend. The electrical resistivity of rubberized cement-soil with No.60 sieve rubber powder is higher than that with No.30 Sieve. The results indicate that there are good linear dependence relation between the electrical resistivity and unconfined compressive strength. For rubberized cement-soil, it is feasible for using electrical resistivity to predict unconfined compressive strength.
Design of Portable Gas Detector Based on DSP
Authors: Zhu Xiang Dong , Han Tao , Lu Wei , Xing Lei , Xue Di
Published: January 2012

A new design method of gas detection system was given based on the new DSP processor TMS320F28335. The experiment system takes six metal-oxide semiconducter gas sensors as well as temperature and humidity sensors in comprising the sensor array module, followed the excellent detection principle how to choose, and choose CH4 and H2 as the test samples and use dual-BP neural-network with the temperature and humidity compensation function as the method to recognize and measure single gas and mixed gases respectively. The result shows that the measuring instrument has higher measuring accuracy and overcomes the shortcoming of other methods, and has important practical application value.
The Finite Element Simulation Used in Straight Tooth Bevel Gear’s Vibration Rotary Forging
Authors: Cai Gai Pin , Zhao Xiao Hui , Su Hong Tao
Published: January 2012

Vibration rotary forging is a complex precision forming process. In the forming process, the addition of the vibration make the boundary condition and the friction condition of the gear blank and the mould changed with the rotation of the head, which lead the forming process of the spur bevel gears become more complicated. Using the rigid-plastic finite element method to study the metal flow law and the stress distribution of the gear blank during the forming process of the spur bevel gears. Using the DEFORM-3D finite element analysis software to simulate and analysis the forming process of the spur bevel gear, in order to get the forming law of the bevel gear during the different type of the vibration parameters.
Research on Aerodynamic Noise Reduction with Non-Smooth Surfaces of Exterior Rearview Mirror Cover
Authors: Chen Xin , Yang Lei
Published: January 2012

In order to research the car interior aerodynamic noise, the non-smooth surfaces of exterior rearview mirror are studied based on computational fluid dynamics (CFD) and computational aero acoustic (CAA) method. The large eddy simulation model was used to construct transient flow field, and the FW-H acoustic model was used to analyze the aerodynamic noise generated by the exterior rearview mirror. From the comparative analysis on aerodynamic noise spectrum of every monitor point, a conclusion can be drawn that the rearview mirror with non-smooth surfaces can improve the performance of car interior aerodynamic noise.
Numerical Simulation of Cement Concrete Under Corrosion Fatigue
Authors: Guan Bo Wen , Chen Shuan Fa , Sheng Yan Ping , Xiong Rui
Published: January 2012

Research on cement concrete under corrosion fatigue is mainly focused on experimental research which is difficult to reveal the physical mechanism of deformation and failure. Models for sulfate attack have been based on the different scientific fields of engineering, mechanics, physics, and mathematics. For this problem, the numerical solution of the cement concrete under the fatigue corrosion is established with establishing diffusion reaction equation basing on Fick's second law under the coupled action of corrosion fatigue and obtaining the stress-strain response
Design of DSP F2812 Control System in Paste Extrusion Experimental Device
Authors: Liu Hong Jun , Chen Hao , Zheng Hua Bin , Gao Hui
Published: January 2012

The RP processes based on ceramic paste extrusion is the layer-by-layer addition process and the paste extrusion process is intermittent. a paste extrusion experimental device has to be developed and the control system is the core problem. In this paper, the TMS320F2812 chip is used to design the DSP control system for driving the step motor in extruder. The DSP F2812 control system consists of emulator and target board. The design of stepper motor control circuit, serial communication circuit and A/D converting circuit in target board is introduced detailedly. The experimental tests show that the control system can be used to investigate the phenomenon in intermittent extrusion process of ceramic paste.
Temperature Field in Simply Supported Laminated Beam
Authors: Qian Hai , Zhou Ding , Liu Wei Qing
Published: January 2012

According to the two-dimensional thermal theory, the temperature distribution in a simply supported laminated beam is studied. Firstly, the temperature distribution in a single-layer simply supported beam is analytically derived. Then, based on the continuity condition of the temperature and heat flux between the connected layers, the temperature and heat flux relations between the lowest layer and the top layer of the beam are recurrently obtained. Finally, the unknown coefficients are determined by the upper and lower surface conditions of the laminated beam. The temperature in the beam is given by substituting the unknown coefficients back to the recurrent formulae.
Application of Rough Set Theory in Stochastic Fatigue Analysis of Vehicle Frame
Authors: Zhao Li Hui , Liu Chang Hong
Published: January 2012

Considering the up-down deflection of vehicle frame as a random variable when a car runs unsteadily, the alternating stress cased by deflection is random. The probability density function is determined by date of the alternating stress acting on the frame. Using the concepts of upper and lower approximation in the rough set theory and confidence degree, random parameters of vehicle frame can be transferred into certain interval values. When the confidence degree took a value from 0 to 1, a series of intervals between the upper and lower approximation are determined respectively. With the algorithm of the interval operation, a method of fatigue analysis is put forward.
Design of Six Freedom Vibration Acquisition System for Military Vehicle
Authors: Zhu Zhi Xiong , Zhu Shi Shun , Wang Guo Jun , Zhu Yan
Published: January 2012

Design and implementation of six freedom transportation vibration spectrum collection system is presented in this paper. The Attitude and Heading Reference System (AHRS) is used to capture signals including x, y, z, direction linear acceleration, angular rates around Z-axis and pitch, roll degree. The software’s architecture and modules for host computer is designed with object-oriented analysis and design techniques, and the software is implemented with VC++6.0. The test results show that the system was able to collect vehicular vibration information on time and the collection data was replayed on the vibration platform.
The Finite Analysis of the Piezoelectric Shell Stack Transducer
Authors: Lu Yu , Wang Li Kun , Qin Lei , Cai Da Ke
Published: January 2012

Novel piezoelectric shell stack in radial direction had been developed. The shell stack was composed of inner and outer shells which are bonded with each other by epoxy resin. The vibration and electromechanical characteristics of the piezoelectric shell stack were modeled and simulated by Finite Element Analysis (FEA). The send voltage response (SV) of both single and double shells under water were computed. Particularly the analytical results of shell stack presented in resonance frequency varying with the radius and thickness had been compared with experiments. The computations show agreement with the experimental results, and the errors are less than 1.28%.
Comparative Study of Gobi Soil Subgrade Settlement Forecasting Methods for Double Line 2 of Lanzhou-Xinjiang Railway
Authors: Nie Zhi Hong , Li Kun
Published: January 2012

the measured data of subgrade settlement on Double Line 2 of Lanzhou-Xinjiang Railway are used to analyze the suitability of the hyperbolic method, Hushino method and Asaoka method to Gobi soil subgrade settlement forecasting. The sensitivity of the methods to the data fluctuation and the influence of the forecasting error and the selection of forecasting start time on the forecasting effectiveness were studied to determine the appropriate forecasting methods and forecasting time.
Study on Remote Condition Monitoring and Fault Diagnosis System for Rotating Machinery Based on LabVIEW
Authors: Wu Chuan Hui , Gao Yan , Guo Yu
Published: January 2012

In order to suit the demand of monitoring and fault diagnosis of modern small and medium machinery devices better, this paper discusses the development of machinery condition monitoring and fault diagnosis system of good universality and strong expansibility using LabVIEW. Mainly illuminates vibration signal, temperature signal and electric current signal acquisition module using NI data acquisition hardware; signal analysis module in time domain, frequency domain and joint time–frequency domain using signal processing technology. DataSocket, database and fuzzy diagnosis technique have been utilized enabling this system to monitor and diagnose machinery fault remotely.
Tilt Measurement with a MEMS Accelerometer Based on Kalman Filter
Authors: Ji Qing Hua
Published: January 2012

Aiming at the high noise level with Micro-Electro-Mechanical System (MEMS) accelerometer, the Kalman filter algorithm is introduced to analyse its output data along with the noises. Experiments and simulations are designed to evaluate the performance and stability under static state and the response speed under dynamic state. The results indicate that the method works fast, steady and effectively with MEMS accelerometer filtering and tilt measurement.
Testing Technology Research on Actual Effect by Construction Piled Pipes in Buried Pipe System of Ground Source Heat Pump
Authors: Xie Xiao Hong , Li Yong , Lai Yu , Cao Yang
Published: January 2012

The technology of Ground-Source Heat Pump (GSHP) is hot in building energy efficiency and HVAC field, and is largely used in engineering practices. We studied the construction of buried-pipe system of GSHP. In this article, purposes the experiment of thermal response by constructing piled pipes are analyzed in the buried-pipe system of GSHP and principles of testing system for buried pipes of GSHP are introduced, also the soil heat response experiments to achieve pre-assessment techniques of design. Through the above testing means, we believe that whether the buried-pipe system of GSHP finally tested meets the designed heat exchange requirement is determined, which is especially significant to estimate and verify whether the whole GSHP system meets requirements of heat capacity.
The Study of the Modified Grain Sorghum Stalk to Remove Methylene Blue Dye from Aqueous Solution
Authors: Li Feng Yu , Zhang Sheng Hua , Chen Jin Yi
Published: January 2012

Pyromellitic dianhydride(PMDA）- modified grain sorghum stalk was used as a novel low-cost adsorbent to remove cationic dye methylene blue(MB) from aqueous solution. Bath studies were carried out to investigate the effects of pH and retention time on the adsorption of MB. The adsorption process could obtain >98% removal percentage within 30 minutes as the MB concentration was at 200 and 300 mg/L. And for 400 mg/L MB, 99% was removed in 6 hrs. The kinetics study showed that the adsorption processes followed the pseudo-second-order kinetic model, which confirming that the sorption rate is controlled by chemical adsorption. Equilibrium isotherms were analyzed by the Langmuir and Freundlich models. Langmuir model can be fitted better than Freundlich with maximum monolayer adsorption capacity of 568.18 mg/g for MB.
The Simulation and Experimental Study on a Novel Vehicle Active Suspension with Electro-Hydrostatic Actuator
Authors: Kou Fa Rong , Ma Jian , Wang Ji Bai
Published: January 2012

Actuator is a very important part of vehicle active control suspension. Based on the analyses of traditional passive suspension and active suspension system, a novel vehicle active suspension with Electro-Hydrostatic Actuator (EHA) is put forward. The system consists of two parts: spring and actuator with variable control force. The actuator includes hydraulic cylinder, hydraulic pump, controller, etc. According to bond graph principle, bond graph model of EHA active suspension are built. In addition, sky-hook controller and fuzzy logic controller are designed and sky-hook control and fuzzy control active suspension are simulated using MATLAB tools. The prototype and test rig of EHA active suspension are developed and bench tests are carried out. The simulation and experimental results show that sky-hook control and fuzzy control active suspension with EHA provide better ride comfort and stability than passive suspension system.
Design of Wireless Temperature Sensor Network Based on nRF905
Authors: Xing Zhen Hua , Wang Hong Wei , Wang Xiao Ni , Surong Qi Mu , Qi Chen Jie , Zhang Wen Kai
Published: January 2012

The wireless sensor network (WSN) is the development trend of the technology of sensor. This paper, based on the nRF905 wireless module, introduces a wireless temperature gathering and transmitting system. From RF modules and master control module, the hardware platform has been designed, beyond that, the paper introduces the temperature sensor network software design. The test show that the system is stable, and datas are reliable.
Shape Optimization of Lower Control Arm under Typical Road Conditions
Authors: Zhao Li Hui , Gu Han , Hong Qing Quan
Published: January 2012

Structure optimization of lower control arm was performed under three proving ground road conditions to find the best drawbead distribution. First, multi-body dynamics analysis was carried on to determine the deficiency of the lower control arm. Then shape optimization was applied based on the widely used optimization method under static loads by converting dynamic load of the three roads to equivalent static loads. Results of the new design show that the strength and stiffness were increased by 24.3% and 42.9% respectively.
Duct Cleaning Robot Comprehensive Kinematics Modeling and Analysis Considering the Complex Terrain
Authors: Wu Bao Qiang , Sun Wei , Ouyang Ming Hua
Published: January 2012

Complex terrain conditions greatly influences the movement of mobile robot,which should not be neglected.In this paper,a novel motion modeling idea is proposed, in which the robot chassis attitude angle changes caused by topographic changes was real-timely measured and be input into the robot kinematic modeling process to establish the overall kinematic model of robot. This modeling method reflect the various parts of the robot motion relations, and also display the complex topography of the robot trajectory of the end of the actuator.Finally,validated and analyzed the feasibility of the modeling method.
An Investigation of GFRP Bar Reinforced Light Weight Concrete (LWC) Bridge Deck
Authors: Huang Jian Wei
Published: January 2012

To avoid the creep rupture of GFRP bar in RC members, not exceeding 20% design tensile strength (ffu)) is recommended as design limit for sustained stress level in GFRP bar in current ACI 440.1R-06 guideline. In this paper, the effects of using light weight concrete (LWC) is studied to investigate the sustained stress level in GFRP bar RC bridge decks by a parametric study. Results show that the sustained stress in GFRP bar in LWC bridge decks is in between 2.8-5.7% of ffu, while it is about 3.44-7.52% for normal weight concrete (NWC) deck.
The Synthesis of Novel Material 3,4-ethylenedioxyfuran
Authors: Sun Xiao Xia , Li Ying Chun , Li Li , Hu Yu
Published: January 2012

A synthetic approach to synthesize 3,4-ethylenedioxyfuran from a common precursor Diglycolic acid is reported. Starting from ethylene diglycol, a six-step synthesis afforded EDOF in 10% overall yield. The procedure described herein offers several advantages, including high product yields, easy purification.
Rolling Bearing Fault Diagnosis Based on Fractal Dimension
Authors: Li Meng
Published: January 2012

Fractal, as a new technique of signal processing, is suitable for analyzing the non-linear fault signals of rotating machine. By researching the characteristic of non-linear vibration signals of rolling bearings, a study of box dimension in analyzing the vibration signals and diagnosing the fault pattern of rolling bearings is proposed. Box dimension algorithm is presented in details and quantificational calculating of non-linear vibration signals generated by bearing system is also discussed. Experimental results show that kinematics mechanisms of rolling bearing result in the different working state, so the box dimensions are different evidently. The application of box dimension in monitoring working state is a new approach to promote the accuracy of rolling bearings.
Fault Diagnosis of Gearbox Based on ICA and Envelope Analysis
Authors: Li Bin , Guo Yu , Liu Ting Wei , Gao Yan
Published: January 2012

The traditional envelope analysis methods are usually ineffective in the fault diagnosis of Gearbox on the condition that there are multi-fault sources in mechanic systems. In the paper, an independent component analysis (ICA) approach is proposed incorporating with the envelope analysis to handle the difficulty. The gearbox envelope signal can be separated into different components according to different vibration sources, and then be further studied by the envelope spectrum analysis in terms of the vibrations in the gearbox. Extensive practical tests on the gearbox including two types of faults are performed to verify the validity of the proposed method. The test results show that the fault frequency characteristics can be separated successfully and the faults are identified precisely.
Parametric Study of EAPap Material Properties
Authors: Zhao Li Jie , Fu Qiang
Published: January 2012

Cellulose paper is used as base material for so-called electroactive papers (EAPap) actuator. EAPap is a complex anisotropic material, which has not been extensively characterized and additional basic testing is required before developing application devices from EAPap. Mechanical properties of EAPap were investigated in this work under different environmental conditions (humidity, temperature, and electrical field) and configurations. It shows viscoelastic effect and exhibits two distinct elastic and plastic modulus connected by a bifurcation point. Through tests, environment and configuration effects on EAPap are obtained to researchers and designers interested in the field of smart materials and EAP.
Effect of a Novel Phosphorus and Silicon System on Flame Retardancy and Thermal Degradation of PC
Authors: Zhao Wei , Li Bin
Published: January 2012

The novel phosphine was used with a silicon resin to impart flame resistancy to polycarbonate. Combustion behaviors and thermal degradation properties of flame retardancy PC have been assayed by limiting oxygen index, vertical burning test and thermogravimetric analysis. Dynamic rheological of FR-PC was also examined. Flame retardant consisted of 80 wt.% PPPO and 20 wt.% silicon resin possesses excellent flame retardancy for PC. LOI value of FR-PC is 33.0% and passes UL-94 V-0 rating. SEM revealed that the char yield as well as char properties have direct effects on the flame retardancy.
Crack Size Tolerance of Under-Matched Joints of Hull Steel with Different Weld Toughness
Authors: Sun Ji , Gui Chi Bin , Chen Wen Jun
Published: January 2012

In order to investigate the safety performance of welding structure of 10CrNi3MoV hull steel, with the application of FAD method provided by SINTAP, this paper made safety assessment for 2 joints with the same yield stress under-matching ratio but different weld toughness. Based on tensile test and CTOD test results, assessment was carried out. Several different sizes (2a) of weld central crack were given. Then the crack size tolerance for each joint can be found. Through relative analysis, a few conclusions were gained. As long as the assessment level is selected, FAD shape changed little. Weld toughness influenced weakly on a joint’s resistance to plastic instability, but significantly on its anti-brittle capacity. The higher weld toughness is, the more likely assessment point located within failure assessment curve, i.e. the safety performance is correspondingly better.
Simulation of near-Crack-Tip Strain Fields on Single-Crystal Silicon Wafer
Authors: Li J.J. , Zhao C.W. , Xing Y.M. , Lv Z.Y. , Du Y.G.
Published: January 2012

The failure components made of silicon is an important issue in the electronic and nano-technological developments. A study on the near-crack-tip deformation of single-crystal silicon wafer under tensile load was presented. The strain formulas around the crack tip of mode I crack were deduced from linear elastic fracture mechanics. The strain fields around the crack tip were simulated and analyzed in detail.
Study on the Catalytic Activity of Graphene Oxide
Authors: He Yong Qiang , Zhang Na Na , Long Ying , Sun Hong , Qiu Hai Xia , Gao Jian Ping
Published: January 2012

Graphene oxide (GO), an oxygen-rich carbonaceous layered material, is produced by the strong oxidation of graphite. The GO aqueous suspension is very stable and can be fabricated to porous GO aerogels by a green method, unidirectional freeze-drying technology. GO shows catalytic activities in both solution and solid state. It can also act as reductant or oxidant depending on the reaction patterns. The product of the reaction was analyzed and the component change of the graphene oxide (GO) was monitored by x-ray photoelectron spectrometer, scanning electron microscopy and transmission electron microscopy. The results confirm that GO not only acts as the reactant in the reaction, but also as the catalyst to catalyze the reaction.
Inversion Behavior for Cylindrical Tubes under Axial Compression
Authors: Chen Dai Heng , Yang Lu
Published: January 2012

This paper presents an analysis of tube inversion under axial compression by a finite element method with the aim of expressing and calculating the axial stress from the stress equilibrium equation. The state of a cylinder under internal stress and the inversion transformation mechanism are then clarified, and verification of the proposed theoretical model is examined.
Effect of Sintering Temperature on Microstructure and Performance of Ti(C,N)-Based Cermets
Authors: Zou Li Yan , Sun Zhi Ping , Zhang Guo Jun
Published: January 2012

In order to find a way which is low cost in preparation of Ti (C,N)/Fe composites. Ti (C,N)/Fe composites were prepared from TiFe (w (Ti)=30%), FeNCr (w (N)=5%,w (Cr)=60%) and toner by Vacuum Hot-pressed Sintering. The effect of sintering temperature on microstructure and performance of Ti (C,N)/Fe composites and the reason of it were studied. The results show that the Ti (C,N)/Fe composites prepared by Vacuum Hot-pressed Sintering have excellent performance, when the temperature was less than 1150°C, shrinkage rate of material was low,and reaction was slow. When the temperature was higher than 1150°C, material shrunk obviously,and reaction became faster, fracture toughness and bending strength rised rapidly at 1150°C-1200°C, rised slowly at 1200°C-1250°C, hardness was maximum at 1200°C.
The Kinetics and Activation Energy of Photocatalytic Degradation of Phenol by TiO2 and TiO2/ PANI Photocatalyst under UV Irradiation
Authors: Li Xue Yan , Luo Qing Zhi , An Jing , Wang De Song
Published: January 2012

The kinetics and activation energy of photocatalytic degradation of phenol has been studied using the catalytically active TiO2 and PANI modified TiO2 nanoparticles. The reaction follows a pseudo-zero-order kinetics. Apparent activation energy of phenol photocatalytic degradation in water was 13.76kJ/mol by TiO2 and was 12.31kJ/mol by TiO2/PANI.
Research on Properties of RE-7075 Al Alloy′s Hot Rolled
Authors: Zhong Jian Hua , Zhu Hong Bin , Feng Kai , Xiao Yin Ping
Published: January 2012

The RE-7075 Al alloy′s hot rolled sheet was studied in this experiment.The microstructure,over-burning temperature,fracture surface and phase were analyzed by modern materials analytical instruments which include OM(optical microscope),DSC(differential scanning calorimetry), SEM(scanning electron microscope) and XRD(X-ray diffraction),respectively. The results show that there are needle-like or rod-like grains in the SL direction and the fibrous or streamlined grains in the LT direction of hot rolled sheet′s microstructure;The microstructure takes place the phenomenon of over-burning when rolling temperature beyond 480°C; These sheets manifest mainly brittle fracture under the tensile stress; The primary phase of microstructure contain α(Al)、AlLa4、Al2Zn3、AlMgZnCuLa、LaMgZn、AlMg4Zn11 . In recent years,people continued to study the rare earth (RE) and add the RE to the conventional aluminum alloy.So the RE became a hot research because it can improve the properties of materials. The RE-7075 Al alloy is one of the categories and can be widely used as the structural materials of aerospace and weapons industry.With aerospace and the war industry enterprise rapid development in our country, the quantity demand is getting bigger and bigger[1-2].Therefore,it is urgent for us to study a high strength-toughness aluminum alloy material.The aim of RE-7075 Al alloy′s hot rolled sheet was researched in this experiment.The microstructure, over-burning temperature,the fracture mode and phase composition of the sheet were indepth analysised under the rolling process. So these can provide a theoretical basis of the hot rolling process development of science.
Preparation and Binding Characteristics of Molecularly Imprinted Polymers for Capsaicin
Authors: Sun Jing , Peng Ning , Ao Wen Xiang , Huang Xue Song
Published: January 2012

To isolate capsaicin effectively, molecular imprinted polymers (MIPs) with capsaicin were synthesized with methacrylicacid (MAA) as function monomers, ethyleneglycol dimethacrylate (EGDMA) as cross linker by non-covalent method. Technological parameters for the preparation of MIPs were optimized by L9(34) orthogonal test. The static equilibrium binding and recognition properties of MIPs to capsaicin were also investigated. The surface structure of the MIPs was visualized by scanning electron micrography. The results show that the optimistic composition of MIP is as following: 0.25 mmol capsaicin, 7.0 mL acetonitrile, 3.0 mL ethylether, 1.25 mmol MAA and 100 μL 80% tween-80. The adsorption isotherms indicates that the MIPs show a good imprinting effect (QMIPs=23.44 mg/g). The MIPs have the specific recognition selectivity for capsaicin in the mixture. Thus, compared with zingerone and piperine which are similar in molecular structure and property to capsaicin, the MIPs show a good selectivity and intense recognition of the template molecule.
Experimental Research on Wave-Absorbing Properties of Pumice Lightweight Aggregate Concrete
Authors: Lv Xing Jun , Cao Ming Li , Li Yan , Li Yong
Published: January 2012

Wave-absorbing properties of ordinary concrete and pumice lightweight aggregate concrete which contained expanded perlite and carbon black were investigated in this paper. The results indicated that pumice lightweight aggregate concrete had ideal wave-absorbing properties. Within the scope of 2 ~ 18 GHz, the lowest reflectivity reached to -20 dB and better than the bandwidth of -5 dB up to 9 GHz. Meanwhile, the incorporation of proper carbon black absorber and expansion perlite can improve wave-absorbing properties.