bluuebunny/crossref_metadata_2025 huggingface dataset:
Flow-Structural Coupled Finite Element Analysis of the Monopole Steel Tower under Wind Load
Authors: Li Bo , Xia Chun , Xing Li , Sheng Zheng Yi
Published: November 2011

Noting that in traditional study, the dynamic response of the tower structure under wind load is usually analyzed by explicitly applying equivalent force on nodes of the tower’s finite element model which may oversimplify the flow-structure interaction interface, this paper presents a fully coupled finite element study of the dynamic response of monopole steel tower. Coupled finite element analysis is used to model the interaction between the steel tower and the wind flow. The steel tower is composed of tubes and is modeled using solid element, while the wind flow is governed by Navier-Stokes equations for incompressive flow. Parameters such as the viscosity of the flow and boundary conditions (wind velocity at different height) are measured from experiments. At each time step of the calculation, winslow moving mesh is used to rezone the computational grid to ensure the accuracy. Simulation is given for studying the deformation pattern of the tower structure.
Dynamic Energy of a Large Scale Transmission Tower Subjected to Wind Excitations
Authors: Li Bo , Chen Bo , Xia Chun
Published: November 2011

Evaluation on energy characteristics of a wind-excited transmission tower-line system is actively carried out in this study. The analytical method of a transmission tower-line system is established. The evaluation criteria of energy responses is developed and applied to the wind response analysis of a transmission tower. A real transmission tower-line system constructed in China is taken as an example to examine the feasibility and reliability of the proposed approach. The observations from numerical investigation indicate that the proposed energy evaluation criteria can be effectively utilized in the examination on structural dynamic performance.
Design of the Oil Well Multi-Parameter Monitoring System
Authors: Wang Mei , Liang Li , Chen Kai , Wang Ning
Published: November 2011

As the information collection device of the current domestic down-hole gathers less information and with low precision, the down-hole monitoring system with multi-parameter is designed in this paper. The system can be used on electric submersible pump to achieve two-way pressure, two-way temperature, leakage current, and vibration signals in real-time acquisition. Filtering the collected data, and using curve fitting algorithm on the pressure sensor for temperature compensation to ensure the accuracy of the data. Test results show that the system can withstand the harsh down-hole environments encountered in an oil well. Plus, the gathered data has high precision and timeliness. Accordingly, it reaches the expected target.
Research on Wet-Chemical Deformation of Roadbed Built with Weathered Stone
Authors: Hou Chao Qun , Wang Xiao Mou , Yang Ling Yun
Published: November 2011

Based on analyses on mineral composition, mechanical property and hydrology property, large-scale triaxial shear test and vibration test were used to study the effect on strength and deformation characteristic, which was caused by wet-chemical and soften of the fillings. Then trial roadbed was filled with 3 typical rocks. Modulus of resilience on the top of the roadbed was gotten via a larger-diameter (D=75 cm) plate loading test which could provide important parameter for pavement structure design. Wet-chemical deformation is researched under constant load amount to deadweight of the roadbed. Experiment results show : (1)single-axle compressive strength (>15 MPa) and modulus of resilience (E0=91.7 MPa) of 3 fillings match the requirement according to specification; (2) these 3 rocks can be used as filling in roadbed; (3) as the fillings have wet-chemical, soften, and expansion properties, the suggestion of damp-proofing and drainage works should be adopted in construction.
A Study Method of Ecological Risk Evaluation for Reclaimed Water
Authors: Huang Guo Zhong , You Yang , Chen Ying , Chang Jiang , Gan Yi Ping
Published: November 2011

According to characteristics which generate from reclaimed water for ecology environment, we utilize event tree analysis (ETA) method to analyze the risk transmission way of reclaimed water, on the base of it, the evaluation index system which reclaimed water for ecology environment effect is preliminary established, and indicator weight is determined by entropy value method. Finally, we set up comprehensive evaluation model using entropy value and gray connection method, combine with the risk matrix to qualitative describe the risk level of comprehensive evaluation result.
Experimental Study on Secondary Effluent Disinfection with Ultrasound and Chlorine
Authors: Li Zi Fu , Zhao Xin , Deng Fu Rong , Jin Xin , Wu Hao
Published: November 2011

Ultrasonic disinfection is safe and effective, but requires high power consumption. For economic considerations, ultrasound and chlorine can be combined to promote a wider range of applications. In this paper, we investigated the disinfection effect of secondary effluent with low-frequency ultrasound and sodium hypochlorite. The optimal conditions were determined by changing the ultrasound intensity, exposure time, chlorine dosage, and chlorine contact time. The results showed that ultrasound can significantly enhance the effects of chlorine disinfection. When the coliform bacteria is 106~107CFU/L, the dosage of chlorine at 4~6mg/l can meet the national discharge standard (less than 104 CFU /L). However, the chlorine dosage can be further reduced to 1~2mg/l if we add 30 s of ultrasonic radiation, thereby reducing the disinfection by-products. Orthogonal experimental results show that the relative importance of the disinfection factors: chlorine dosage> ultrasonic irradiation time >chlorine contact time> ultrasound intensity.
Stress Distribution of Strip at the Parts in Contact with Roll in Continuous Annealing Furnace
Authors: Xing Yi Ding , Wen Zhi , Dou Rui Feng , Feng Xiao Hong , Li Zhi , Dong Bin
Published: November 2011

The phenomenon of buckling is attributed to the non-uniform stress imposed on strip. This paper investigates the occurrence of this non-uniform by calculating the stress distribution in circumferential and axial direction. The results indicate that stress distribution is even in circumferential direction, and the non-uniform happens in the axial direction. Furthermore, this non-uniform is quiet related to the proportion of strip width and the roll flat part length. Meanwhile, the roll flat part length should as long as it could be in the context of insuring the enough centripetal force to prevent the snaking.
Life Cycle Assessment on Resourceful Utilization System of Flue Gas Desulfurization and Denitration with Pyrolusite Slurry
Authors: Luo Le , Sun Wei Yi , Qiu Cheng , Su Shi Jun , Wang Hong Tao
Published: November 2011

Reducing the adverse impacts to environment is a more and more important subject in electrolytic manganese industry. Life cycle assessment (LCA) has been a hot tool to measure the type and size of environmental impact. This paper firstly applied LCA on two different processes of producing electrolytic manganese. One process is the resourceful utilization system of high sulfur coal and low grade pyrolusite (the novel process for short)in which high sulfur coal is burned to generate power and emission SO2, then the SO2 is absorbed as reducing agent to leach the pyrolusite with 30% MnO2 grade. The other process is prevalent interiorly, called traditional process where the power is supplied by standard coal combustion, and sulfur acid leaches the manganese ore with 18% Mn grade. Life cycle software converts the original data to nine different kinds of indexes that are able to indicate types and sizes of environmental impacts. Results show that: among nine environmental impacts, the proportion of abiotic depletion potential (ADP) is biggest in both processes, but the value of the novel process is 23.25% smaller pointing the process saves more resource. All the values of other important impacts including GWP, Waste Solids, AP and RI of the novel process are less than those in traditional process. Especially, the value of acidification (AP) in novel process was -2.10×10-8 < 0, which means the novel process could control the acidification. In addition, through the composite index, using high sulfur coal in the novel process hasn’t bring any more serious impact than using standard coal. Therefore, LCA has provided rational evidence to prove that resourceful utilization system of high sulfur coal and low grade pyrolusite is more efficient and environmentally friendly and pointed which environmental impacts and life cycle links need improving . This paper could provide a reference for further environmental impact assessment of electrolytic manganese industry and an objective basis for decision-making.
Dried Municiple Sewage Sludge Gasification Experiment in Dual Fluidized Bed
Authors: Fan Xiao Xu , Chu Lei Zhe , Yang Li Guo
Published: November 2011

The fuel characteristics of municipal sewage sludge are suitable for dual fluidized bed(DFB) gasification, which can get middle calorific value gas through volatile pyrolysis, and reduce volume through char combustion. The hot test results of municipal sewage sludge on DFB rig were showen that the temperature distribution along combustor heigh is uniform, and the carbon content of fly ash is about 2~3%. In the experiment, with the increase of gasifier temperatrue, the more volatile of the sewage sludge was pyrolyzed. When the temperature of the gasifier reached 800°C, the calorific value of gas was 6.9MJ/Nm3; the emissions of SO2, NOx and HCl were appropriate to the standard. The leaching toxicity of heavy metal of the fly ash was lower than the discharge standard.
The Measures of Mine Environment Protection and Control in Qinyang, Henan Province
Authors: Zhang Lin Lin , Zhou Shu Li , Mi Wen Man , Liao Ming Qing , Wang Kun , Long Hua Dan
Published: November 2011

There are abundant mineral resources in China. On the one hand, we should ensure the effective supply of resources in the process of the economic and social development. On the other hand, we should change the way to develop the mineral resources extensively, reduce the pollution and ecological environment disruption minimally in the process of developing the resources, control the mine environment which is disrupted before and improve the production and living environment in the mine zone to achieve the sustainable development in terms of economy, environment and resources. At present, the development of mineral resources in China has brought enormous benefits to us. The main present and future mission is that we should raise our awareness of mine environmental protection, control the mine environment and reduce the disruption.
Rheological and Thermal Behaviour of High Impact Polystyrene Nanocomposite
Authors: AL-Ghamdi Ahmed S. , Mohammad Yeakub Ali
Published: November 2011

This paper presents the study of rheological and thermal behaviour of high impact polystyrene/multiwall carbon nanotubes (HIPS/MWCNTs) nanocomposite. The nanocomposite was prepared via melt mixing method. The influence of different loadings of MWCNTs on the HIPS viscosity and other rheological characteristics were analyzed experimentally. Other rheological characteristics were studied using dynamic analysis of viscosity through rotational rehometer. Glass transition temperature (Tg) were also investigated using non-isothermal differential scanning calorimeter analysis. The viscosity was found to be directly proportional to MWCNTs’ loading, up to five times the value of pure HIPS at loading level of 7.5wt% of MWCNTs. The MWCNTs loading demonstrated a marginal effect (1-2%) on the Tg.
A Hybrid Algorithm to Solute the Problem of the Robot Path Planning
Authors: Yuan Quan Bo , Wang Hui Juan , Zhu Peng Hua , Zhao Hui
Published: November 2011

This paper analyzes the problems of artificial potential fields in robot path planning. A hybrid algorithm for robot path planning is proposed. Robot searching for path in artificial potential fields method, it is possible that the robot can’t reach the goal because of local minimum, when it is best to use a genetic algorithm for robot. Simulation results show the effectiveness of the models, and it can effectively solve the problem caused by defects of artificial potential fields in the path planning.
PVA/Kaolinite Nanocomposite Hydrogels: Preparation Method and Characterization
Authors: Sirousazar M. , Kokabi M. , Bahramian A.R. , Hassan Z.M.
Published: November 2011

In this work, nanocomposite hydrogels on the basis of Polyvinyl alcohol (PVA) and kaolinite nanoclay were prepared by the repeatedly freezing-thawing method. The structure and morphology of nanocomposite hydrogels were studied by the XRD, TEM and SEM techniques. The function of nanoclay in the nanocomposite hydrogels was investigated using the FTIR and DSC tests. It was found that the prepared nanocomposite hydrogels have the intercalated morphology with good dispersion of nanoclay layers in hydrogel matrix. DSC results showed some shifting in the glass transition temperature of PVA hydrogel in presence of nanoclay. The FTIR results also showed that some interactions have been developed between the hydroxyl groups of PVA chains and kaolinite layers in nanocomposite hydrogels.
A Theoretical Investigation on the Capillary Model of Lubricant Penetration
Authors: Zheng Wen Jie , Pei Hong Jie , Wang Gui Cheng , Shen Chun Gen
Published: November 2011

In metal processing, lubricant penetration process can be explained by the capillary model theory. Observed through microscope, cylindrical capillary model was chosen and was analyzed on the basis of hydrokinetics. Moreover, it was indicated of the basis for dividing the entire penetration process. Based on kinetic theory of gases, the penetration of gas-liquid two-phase flow in minimum quantity lubrication (MQL) machining was simply analyzed and it was pointed out that there was only gaseous phase filling process.
Study on Start Burning Performance of Micro-ICP Using Stereo Spiral Coil
Authors: Wang Yong Qing , Chong Na , Sun Rong Xia , Zhou Ying Chang , Chen Wen Jun
Published: November 2011

According to the problem of low energy utilization of plane spiral coil used in micro-ICP, a kind of micro stereo helical coil was designed. Made 24 different structural parameters of stereo spiral coil whose diameter range 3~10 mm. Using comprehensive experimental method tested different parameters’ coils inspire argon plasma. In 13.56MHz RF power, relationships between argon pressure, coil turns, coil diameter and combustion /maintaining power of micro-ICP excitation source were tested. From spectrometer observed 17 argon emission spectrum in 690~860 nm. Spectral lines intensity influenced by RF power and work pressure. Experiments proved that micro-ICP excitation source using stereo helical coil is feasible. It can form Ar plasma and inspire Ar spectral lines.
Properties of Iron Tailing Coatings on Stainless Steel Substrate
Authors: Liu Shu Xian , Wang Qian Ping , Nie Yi Miao
Published: November 2011

Flame sprayed iron tailings coatings on the boiler steels are characterized before and after melting. The attempt has been made to investigate the microstructure, erosion resistant, wear resistant of the coated and melted samples. The techniques used are SEM and XRD. The results show that: Good adhesion between the coating and the substrate is caused by the formation of Al2SiO3 and (Cr, Fe)2O3 at the interface of the coated specimen. The stainless steel substrate with ceramic coating has a higher erosiSubscript texton resistance than the uncoated specimen because the mixed powder changes to a glass-coating in the high temperature heat treatment, and a few mullite are formed. Mullite has the high hardness value that makes the hardness of the coating increased. The wear resistance of the coated samples is better than that of the uncoated samples because glass-coating is more smooth than the uncoated specimen and the mullite in the coating has the high hardness value that makes the hardness of the coating increased.
Erosion-Behaviors of the Steel Structure Coating Eroded at Low Erosion-Angle in Sandstorm Environment
Authors: Hao Yun Hong , Xing Yong Ming , Li Li
Published: November 2011

Aiming at the durability deterioration of the coating of steel structure because of being eroded in sandstorm. through the erosion test to the coating of steel structure by airflow jet with sand at low erosion-angle, the mass-loss measurement method is used to assess erosion-wear degree of the coating, Observation of microstructure of the erosion zone using SEM to analyze the erosion-wear mechanism of the coating, and proposes a assessment formula for assessing the erosion-wear degree of the coating. Results show that the erosion-wear mechanism is that erosion is mainly micro-cutting role at low erosion-angle, materials hardness is decisive factor, and erosion is mainly compression deformation at high erosion-angle, materials toughness plays decisive role, as the coating is low hardness and high toughness materials, which is eroded more seriously at low erosion-angle. The reliability of the assessment formula is verified to assess the erosion-wear degree of the coating. The study will provide basis for exactly assessing the durability of steel structure.
Comparison on the Adsorption Thermodynamics of Three Typical Petroleum Hydrocarbons in the Single and Mixed Solution on Aquifer Media
Authors: Qin Yu , Xiong Ying , Kang Chun Li , Wang Jing Rui , Liu Han Fei , He Chong , Lin Xue Yu
Published: November 2011

This paper researched on the adsorption kinetics and thermodynamics of the typical components of petroleum hydrocarbon-benzene, naphthalene, phenanthrene and their mixed solution on the typical media-the medium sand from the aquifer in an oil contaminated field, with a self-made rotary adsorption device. The result showed that the adsorption of the three adsorbates on the media follows the Henry adsorption model, no matter when they are separated or mixed. The adsorption capacity order of benzene, naphthalene and phenanthrene on the medium sand is phenanthrene> naphthalene>benzene, when they are separated or mixed. Comparing with the adsorption capacity when the adsorbates are single, benzene and naphthalene in the mixed solution shows stronger adsorption capacity, while phenanthrene carries on less adsorption capacity.
Application of Time-Frequency Distributions to the Blind Source Separation of Mechanical Fault Signals
Authors: Hao Zhi Hua , Tian Hong Xia , Tian Li Xin
Published: November 2011

In this study, blind source separation (BSS) method was applied to separate the multi-channel fault vibration signals generated by a rotor. As the signals were non-stationary, an algorithm based on spatial time-frequency distributions was applied to the experimental vibration signals to obtain the non-stationary vibration sources that were mutually independent. Further, AR modeling estimates of these sources were calculated with BURG method. A neural network was applied to the AR modeling parameters to perform the fault classification. The separation results of an experiment on a rotor’s multi-fault show that this method is feasible for fault diagnosis.
Experimental Study on Enhanced Denitrification of Microbial and Steel Fuel Cell
Authors: Cui Kang Ping , Cao Xiao Yan , Jin Song
Published: November 2011

Constructed a two-chambered microbial fuel cell (MFC) and a similar abiotic fuel Cell----Steel fuel cell (SFC), studies the influence of elimination effect about various variables (anode material , size of salt bridge and so on) to the nitrate. The experiment indicated that the elimination efficiency of MFC to the nitrate is 71.46% equally, SFC is 67.99%, and degeneration speed of nitrate is 8mg nitrate/L/day approximately. It has confirmed that MFC and SFC is one highly effective method on elimination nitrate, and the elimination effect of MFC to nitrate is better than SFC.
Effects of Indigenous and Exogenous Microbial Inocula on Dynamic Changes of Enzyme Activities during Composting in a Bioreactor
Authors: Xu Z. , Zhang F.B. , Zhang L.L. , Li J.
Published: November 2011

The composting with chicken manure as raw material was carried out to study the effects of indigenous and exogenous inoculation on temperature, oxygen concentration, as well as protease activity, urease activity, dehydrogenase activity and cellulase activity in different composting stages by using a composting bioreactor. The treatment with indigenous microbial inocula had higher temperature and lower oxygen concentration at the beginning stage of composting. During the period of raising temperature, the protease activity, urease activity and temperature were highly significant positive correlation (p <0.01); At the period of raising temperature and High-Temperature, dehydrogenase activity and temperature were all highly significant positive correlation between (p <0.01); There was a significant positive correlation between the temperature and cellulase activity at the High-Temperature period (p <0.05) . Endogenous microbial inocula was favor of protein and urease activity increased rapidly, and the promoted the quick start of composting during the temperature raising; At the High-Temperature stage, cellulase and dehydrogenase activity were advanced after inoculated indigenous microbial inocula, promoted oxidation-reduction reaction during the composting.
Measurements of Final Volatiles Yield of Biomass Devolatization at Flash Heating Rate
Authors: Wang Li Hong , Yi Wei Ming , Bai Xue Yuan , Li Yong Jun , Cai Hong Zhen
Published: November 2011

Final volatiles yield of biomass devolatization at flash heating rate was determined via experiments. Samples of wheat straw and corn stalk powder were dispersed in the feeder and were carried by argon into the laminar entrained flow reactor. Flash devolatization of tiny biomass particles was accomplished in the moderate temperature reactor. Residue was collected and the ash content of it was detected in a thermo-grametric analyzer. Final volatiles yield was calculated using ash trace method. Altogether, 96 experiments (including repeat ones) of different reaction temperature (500, 550, 600, 650 °C), different collecting distance (550, 600, 650, 700 mm away from inlet). Results showed that final volatiles yields of wheat straw and corn stalk are 79%, 85 % separately. High reproducibility of the experiments showed it is a reliable method to determine final volatiles yield of biomass devolatization at flash heating rate. Kinetic parameters for wheat straw and corn stalk were modified as A=1009/s, E=3782kJ/mol and A=596/s, E=3716kJ/mol, respectively.
Affect of Assimilable Organic Carbon (AOC) and Phosphorus to Heterotrophic Microbial Growth in Drinking Water Distribution System
Authors: Jiang Deng Ling , Ni Guo Wei , Chen Yan Hua , Zhu Qing Jie
Published: November 2011

The content of assimilable organic carbon (AOC) has been proposed to control the growth of heterotrophic microbe in drinking water distribution systme. However, recent results have shown that there are regions where it is predominantly phosphorus which determines the extent of microbial growth in drinking water. The growth of bacteria was studied in a drinking water distribution system where the content of AOC was high (40.84- 551.35 μg acetate-C/L) and the content of Microbially Available Phosphorus (MAP) was also high (0.69-8.01 μg PO43--P/L). It was AOC other than phosphorus that controlled the growth of bacteria in the drinking water distribution system. Comparably obvious linear relationship was found between the maximum HPC and the maximum content of AOC of the distribution system. Removal of organic matters is ideal approach to control water quality of the drinking water distribution system.
Manufacturing of Multifunctional Nanocrystalline ZnO Thin Films
Authors: Jayatissa Ahalapitiya H. , Soleimanpour A.M. , Hao Yue
Published: November 2011

Optical, surface and structural properties of ZnO thin films fabricated by reactive radio- frequency (rf) magnetron sputtering and sol-gel coating methods are comparatively investigated. The optical properties of films produced by both techniques have very similar characteristics, however; the surface morphology and degree of crystallinity have different behaviors. The nanostructure columnar zinc oxide thin films can be synthesized by sol-gel coating methods which can have numerous applications requiring larger surface area. Also, the process scalability and large-scale manufacturing of these materials are discussed. It indicated that the nanostructure ZnO thin films can be synthesized with sol-gel methods at wafer levels with nano-grains and improved surface properties compared with reactive rf magnetron sputtering deposition.
Extracting of Weak Periodic Impact Feature Based on Mean Filtering and Wavelet Transform
Authors: Du Fei , Ma Tian Bing
Published: November 2011

Based on mean filtering with good denoising capability for white gaussian noise and wavelet transform with high frequency denoising and singularity detection capabilities, a new method combining mean filtering and wavelet transform is proposed for extracting weak periodic impact signal in heavy noise background. Three different thresholds of wavelet transform are used to extract feature. The simulation results show that the wavelet filtering with improved threshold has the best effect. The SNR(Signal to Noise Ratio) are greatly improved and RMSE(Root Mean Square Error) are greatly reduced.This method has an excellent effect on extracting weak periodic impact feature and has very strong practicability.
Research on Photovoltaic Grid-Connected Generation System
Authors: Yang Shu Ying , Wu Li Hong , Liu Zhao Xia
Published: November 2011

This dissertation researches on photovoltaic grid-connected generation system. Photovoltaic grid-connected generation system has two core parts which are maximum power tracking control(MPPT) of photovoltaic cells and the control of the grid-connected inverter. Firstly,this paper introduces the operational principle and performance characteristic of photovoltaic cells,and describes the equivalent circuit and mathematical model. Secondly,this paper introduces several traditional MPPT control algorithms. Based on the maximum power of the fast track process and stability, an improved intermittent scan method is designed to implement the maximum power output in the photovoltaic grid-connection generation system and improve system performance and maximum power point tracking speed. Finally, this dissertation analyses the targets of grid-connected inverter control and studies the control strategies, and then designs mathematical model of control system in photovoltaic grid-connected voltage/current inverter based on Sinusoidal Pulse Width Modulation (SPWM).
The Research and Development of NTC Automatic Tool Selection Based on Aucol
Authors: Deng Chang Qi , Li Bin
Published: November 2011

This paper analyses the performance characteristics of NTC magazine, introduces the mode and characteristic of tool selection, discusses the details of the function and the design of the software of the control system. It also utilizes the automatic tool selection of PLC magazine set in the Italian FIDIA CNC and introduces the chart flow of automatic tool selection system. By adopting the brand new Aucol to realize the automatic tool selection program in the magazine, machine tools can improve their productivity in reliability and maintenance. The utilization in production indicates a good control result, which provides an approach of technological innovation for factories.
Study on the Power Control Method of a Stand-Alone Wind Energy System Based on DSEG
Authors: Sun Jian Fei , Zhou Bo , Guo Hong Hao , Zuo Guang Jie
Published: November 2011

The Stand-Alone wind energy supply system equipped with a doubly Salient Electro-Magnetic Generator (DSEG) is presented in this paper. First, the analysis of the operating characteristics of wind turbine and DSEG is introduced. Based on the strategy of power signal feedback (PSF), the excitation current of DSEG is regulated, as a result, Electro-Magnetic torque of the DSEG is controlled and the maximum wind energy tracking is achieved. Battery is employed as an energy storage device and interfaced to the wind energy system through bidirectional DC/DC converter. The control strategies of the bidirectional DC/DC are proposed to balance the power differences between the generator and the power the load, so that voltage of the DC bus could be constant under varying wind speed and load. The simulation results show the effectiveness of the control methods.
Research of Roll-Isolated Gimbal Platform and a Two-Position Initial Alignment Scheme of SINS in Spinning Projectile
Authors: Shi Yong Sheng , Wang Bo , Dong Ming Jie , Gao Zhi Feng
Published: November 2011

It is difficult to apply a traditional strapdown inertial navigation system(SINS) to spinning projectile because of high spin rate. A Roll-Isolated gimbal platform is introduced to prevent SINS by the projectile’s spinning motion. Roll-Isolation is accomplished by supporting the inertial measurement unit(IMU) on a single gimbal, the axis of which is parallel to the projectile’s spinning axis. Roll-Isolation prevents the saturation of the roll gyro by the high vehicle spin rate and greatly reduces the measurement errors arising from gyro scale factor and misalignment. On the basis of roll-isolation, the paper presents a Two-Position initial alignment scheme of SINS on stationary base, which is realized by changing the IMU roll angle around the spinning axis. Furthermore, the paper studies on the observability of the scheme, and the results show that it not only improves observability but also minimizes alignment errors.
Geometric Distortion Correction of Geothermal Field Hyperspectral Remote Sensing Images in Lintong, Shanxi
Authors: Zhou Xiao Hu
Published: November 2011

The accurate delineation of geothermal resources with remote sensing technology is one hot topic in recent years. Remote sensing images used in previous studies, are mostly space multi-spectral remote sensing images, spectral resolution and spatial resolution are relatively low, difficult to accurately delineate the geothermal anomaly. Considering those research at home and abroad, using Hyperspectral resolution remote sensing images, choosing Lintong area for the study area. Because of hyperspectral remote sensing images exist in the acquisition process more obvious geometric distortion, during data processing, information extraction, geothermal anomaly delineated and so the information is needed before the image is first geometrically corrected in order to obtain high precision and high-quality remote sensing images. This research in this regard a useful exploration and obtained ideal result.
Applying Skill Technology to Aid Cadence Allegro Part Management
Authors: Zheng Hai Chun
Published: November 2011

Library construction is a fundamental work in Cadence Allegro’s schematic and PCB (printed circuit board) constructing process. Existing part libraries are normally organized in directory structure. With the increment of the amount of library files, part management becomes slow and error-prone which is carried out on manual basis. A new method is given by designing part management software through applying the SKILL technology to aid Cadence Allegro part management. Application results show that the new method is effective in the library construction.
Feedback Synchronization of Uncertain Chen Chaotic System
Authors: Wang Dong Xiao , Mao Bei Xing
Published: November 2011

In this paper, chaos synchronization is studied. Two schemes are proposed to synchronizing Chen chaotic system with all the system parameters unknown. Especially in the last two schemes, only one state variable is contained in the controller. Also, numerical simulations are given to illustrate the effectiveness of the methods.
Numerical Simulation Study on BF Raceway
Authors: Guo Shu Yi , Han Su Lan
Published: November 2011

Based on the grain orbit model, this paper built the raceway turbulent mathematical model on the consider of various factors, such as coke pyrogenation, water evaporation, coke burning, air turbulent and other chemical reactions in BF raceway, and used the secondary development of CFX software to complete the numerical simulation of the mathematical model and to analyze the state in a visualization way. The distribution rule of the gas flow is that the flow is poor in the center of BF and the flow is high in the BF fringe. The results of the numerical resolution were confirmed by the BF experiments. This study provided data support for optimizing the BF operating system.
Wireless Monitoring System for Mechanical Equipment Based on Multi-Agent Technology
Authors: Ma Bin , Chi Tie , Ma Xiao Fu , Meng Xiang Bin , Hao Lin Chong , Wang Di
Published: November 2011

For the status quo that monitoring system for mechanical equipment has limited ability to integrate information and make decision, designed the model of wireless monitoring system for mechanical equipment based on multi-Agent technology, discussed means to exchange information and communication principle among each Agent, proposed method to adjust performance parameters and task data for inference results of decision-making-Agent based on BP neural network control algorithm, realized automatic and intelligent monitoring for mechanical equipment performance.
Automatic Body Control Model Experimental Platform Design Based on CAN-Bus
Authors: Sun Bin , Hu Yue Li
Published: November 2011

The CAN-Bus technology in the automotive body control module applications is discussed, A experimental platform is designed for CAN-Bus network test in laboratory environment, which is based on the CAN-Bus network structure in a certain type of automotive
The Study on Optimal Location of Mine Materials Distribution Center with GPS
Authors: Zhao Zhong Ling
Published: November 2011

This approach to system analysis, understanding and analysis of optimization of the object, clear logistics optimization objectives, the establishment of the model reflect the actual logistics process to determine the operating model of a variety of data, evaluation of logistics optimization program performance, continuous improvement of logistics optimization program; study supply logistics center in strategy and optimization, explicit location decision-making in logistics management and its influencing factors, to determine the regional distribution centers and the number of distribution centers. The basis of these studies, as Yanzhou mining group for material distribution lines and distribution centers optimize settings to improve the coal group on the efficiency and effectiveness of material delivery.
The Measurement and Process of Aeroengine Inlet Total Pressure Field
Authors: Yang Xun , Lei Yong
Published: November 2011

It’s important to measure inlet total pressure field for aeroengine. Firstly, test scheme is discussed. Three pectinate total pressure probes, which can be rotated with an additional straight ring segment around the engine axis, are used to measure the total pressure field. The radial distribution of test points is designed via Tchebycheff integral method. Radial average and circumferential average are calculated according to the field data via area averaging method. At last the total pressure field is visualized via mapping the data to colors. Test results show that the total pressure distribution in main airflow is evener than that in boundary layers and the thickness of inner and outer ring boundary layer can be estimated.
A Study on Double-Stage Fuzzy Control of Drum Level in Waste Heat Boiler
Authors: Zhao Yan Yan , Meng Qing Jin , Liu Zhao
Published: November 2011

The waste heat boiler is an important part of waste heat power station in cement plant. So it is highly important to control the drum level of waste heat boiler within the allowed range. A Double-Stage fuzzy controller which is used to control the drum level of the waste heat boiler is presented in this paper. This method adds a secondary fuzzy controller to adjust the weight of the first fuzzy controller’s factor on the basis of a general fuzzy controller. Simulation results show that the double-stage fuzzy control system has fast respond speed, high precision and strong anti-jamming capability.
Implementation and Application of Mapping between IEC61400-25 of Wind Farm and Web Services
Authors: Li Zhong Yuan , Duan Bin , Yang Wei
Published: November 2011

Along with the development of domestic wind power and the maturement of technology, equipment in the wind farm and monitoring system provided by multiple vendors will not be compatible with each other and it is not easy to make unified maintenance and management on wind power plant. The International Electrotechnical Commission (IEC) has drafted the IEC61400-25 series standard which faces communication for monitoring and control wind power plant for the problems above. In the demand of market competition and expansion of wind farm, IEC61400 will finally become a trend that monitoring system of communication must follow. Aiming at popular communication for monitoring and control wind power plant based on Web Services, this paper has analysed the mapping between IEC61400-25 and Web Services, proposed a concrete solution of engineering implementation,constructed the system structure of communication for monitoring and control wind power plant, designed software module structure of Web Services service of wind power, solved the problem of compatible between the communication for monitoring and control wind power plant based on Web Services and IEC61400-25 standard.
Simulation of Internal Arcing in High Voltage Switchgear Based on Fluent
Authors: Yuan Shun , Wang Wei , Li Feng
Published: November 2011

Internal arcing faults in the high voltage switchgear may cause serious damage to the equipment and fatal injury to personnel. To simulation the fault arcs based on appropriate calculation methods can not only shorten the development period of arc resistant switchgear, but also save the development cost. In this paper, based on KYN28-12(Z) switchgear, three-dimensional mathematical model of pressure relief channel of circuit breaker chamber in switchgear is established by using the GAMBIT software, then simulate the process of internal arcing in switchgear by adopting FLUENT software. The influence of the length and depth of pressure relief vent, also the loading position of arc discussed in the simulation.
Modeling and Control of a Flexible Input Boost Chopper Linked to AC Drive System
Authors: Chao Ze Yun , Fang Wei Jia
Published: November 2011

In order to assure the inverter could operate either from rectifier utility power or battery packs to provide regulated sinusoidal power for ac motor, a boost chopper with flexible input voltages and constant output voltage usually used to offer the link dc voltage to ac drive system. In this paper, the objective is to propose a new control scheme to assure the boost chopper has good dynamic performance under the disturbance of input voltage and load. The mathematic model of the boost chopper based on PWM three-terminal switch device is discussed. The test results show that the proposed control system has robust performance with whether the disturbance of input voltage or loads.
Control of a Fractional-Order Arneodo System
Authors: Zhang Kun , Wang Hua , Wang Hui Tao
Published: November 2011

In this work, stability analysis of the Fractional-Order Arneodo system is studied by using the fractional Routh-Hurwitz criteria. Furthermore, the fractional Routh-Hurwitz conditions are used to control chaos in the proposed fractional-order system to its equilibria. Based on the fractional Routh-Hurwitz conditions and using specific choice of linear feedback controllers, it is shown that the Arneodo system is controlled to its equilibrium points. Numerical results show the effectiveness of the theoretical analysis.
Similarity Laws of Distorted Model with a Movable Bed and its Validity
Authors: Wei Bing Qian , Xun Hong Yun , Xiao Rong Ge , Meng Wen Qiang
Published: November 2011

The theoretical backing of the similarity laws obtained from dual dimensionless parameters of the bed-form classification diagram is given by solving the equations of similarity conditions which is obtained from 1-Dimensional equation of motion, continuity equation, bed deformation equation and the formula of bed load transport. Secondly, the validity of the similarity laws is confirmed by comparing the bed form of distorted model experiment with that of undistorted model experiments performed by Hokkaido Development Bureau (H.D.B.). And also the fact that the height of bar in a gentle curved river channel can be estimated by the result of distorted model of straight flume is found.
A Novel Speed Sensorless Control of Brushless DC Motor in Position Servo System
Authors: Chen Chang Chun , Wei Jia Dan , Zhou Bo , Li Guo Sheng
Published: November 2011

Zero crossing points of Back-Electromotive force (EMF) is the most mature and widely used method of the speed sensorless control of brushless DC motor (BLDCM). However, with the poor performance from standstill to low speed, it is not suitable for the position servo system. Therefore, this paper first analyzes several conventional speed sensorless control schemes in the BLDCM, then presents a novel control algorithms for the BLDCM. In the proposed method, the short pulse sensing method for the rotor position in the Start-Up process and self-synchronization with zero cross points of back-EMF are combined together. As a result, the BLDCM used in the position servo system can be easily controlled from zero to high speed, the theoretical analysis is verified by the simulation results based on Matlab, it shows that the proposed algorithms can improve the performances of position servo system compared with the conventional methods.
Crane Mechanics Crack Growth Life Analysis Method Research Based SIF Amplitude Fitting
Authors: Sun Yuan Tao , Wang Shao Mei
Published: November 2011

At present, the crane metal structure cracks are ignored based on the traditional strength theory in the crane engineering design. As enlarging of crane mechanics, although their maximum stress don’t exceed allowed stress, recently considerable number of serious crane accidents happened, that are caused by the fracture because of crack faults. It is essential to analyze crack growth based on fracture mechanics in design or diagnose. The crack analysis consists of determination of the crack growth trajectory and calculation of crack growth rate. In generally, the crack of crane is supposed as I-mode in the engineer application. So the crack growth trajectory can be determinated without calculation, which simply cracks trajectory analysis. Then the crack growth rate will be calculated according to the Paris formula. The Paris’s formula is put forward as the form of the relation between stress value and crack length often. To improve the precision, a new method is put forward in the paper. According to the method, the form of Paris’s formula is function of the stress intensity factor (SIF). The new method is valid and high precision through the comparing with the boundary collocation method and the traditional method. And then an example of crack growth analysis on crane is given; the analysis procedure is described also. The method has a benefit to prevent fracture failure and it is supplement to the traditional strength design method also
Dynamic Inversion Guidance Law for a Hypersonic Vehicle
Authors: Qiao Qing Qing , Chen Wan Chun
Published: November 2011

An adapting dynamic inversion guidance law developed by using integral of time multiply by absolute error (ITAE) performance index for a hypersonic vehicle was studied. As a nominal trajectory, Maximum-Range glide trajectory was obtained by using collocation and successive quadratic programming. Dynamic inversion technique was employed to produce a guidance law which contains two PID controllers. To find optimal guidance parameters, ITAE criteria were used to tune the PID parameters. The numerical result showed that the guidance law was simple and efficient for a hypersonic vehicle flies along the optimal trajectory.
A New Landslide Forecast Method and its Application in an Opencast Coal Mine
Authors: Zhang Yan Bo , Yu Jing Min
Published: November 2011

In order to find the controlling factors of slope stability and instability criterion for slope engineering, and provide a theoretical basis for developing landslide control technique, the regression function and regression parameter were obtained by applying the generalized least square method, and the partial linear model was derived after the regression analysis for the slope horizontal displacement and monitoring time by using B-spline method. The front several terms of the Taylor’s series were intercepted after the function of the partial linear model was expressed as Taylor’s series expansion. The cusp catastrophic model was eventually obtained by means of variable substitution, and the risk of landslide would be recognized with the aid of the catastrophic criterion. The method of landslide forecast was verified by the field monitoring data.
Study on Upgrading and Further Usage of Glycerol from Waste Water
Authors: Guo Xiao Ya , Ci Bing Bing , Li Shou Guang , Hu Wei , Yu Jing Lu , Tang Xiang Hui
Published: November 2011

Waste water from enzymatic biodiesel technology (contained glycerol 5%) is treated as following: Firstly, waste water is filtered with a gauze, add KOH to PH=7~8, and filter to remove salt soap. Secondly, the processed liquid distil at 50°C in Rotary Evaporator vacuum to remove most of water and methanol, then concentrated solution use plinthic flocculants (mass ratio of 100:1), stirring at 70°C to eliminate colloid. Finally, at 180°C, 0.8 kPa to vacuum distil to collect glycerol of purity up to 90.43％.The glycerol react with acetic acid to get glycerol triacetate with phosphotungstic acid catalyst, toluene as water-carrying agent. Thus comes out the yield of more than 90％ glycerol triacetate in 6 hours.
A Comparison of Rotational Speed of Marine Current Power-Generation Turbine with and without a Speeding-up Inlet
Authors: Dong Zhi Yong , Zhang Xu , Wang Li , Han Wei , Yu Xiao Wei , Yan Xiao Fan , Zhu Fang , Li Xiao Peng
Published: November 2011

This paper experimentally investigates effects of speeding-up inlet on rotational speed of marine current energy turbine. Several length-radius ratios L/d and area ratios A´/A of the speeding-up inlet as well as several flow yawing angles θ were considered. Also, a comparison of rotational speed of turbine in the presence and absence of speeding-up inlet was made. A relation between flow velocity V and rotational speed of the inlet n was analyzed. And a relation between flow velocity and rotational speed of turbine in free stream was theoretically developed.
Preparation of FeO Nanofluid and its Enhancing Mass Transfer Performance
Authors: Wu Wei Dong , Sheng Wei , Han Zhi Ming , Wu Run Yu
Published: November 2011

The main objectives of this work are to experimentally examine the enhancing mass transfer performance of FeO nanofluid on the bubble absorption and to find the optimal method to design highly effective compact absorber for NH3/H2O absorption refrigerator. Based on the microcosmic analysis of the factors affecting the stable performance of nanofluid, FeO nanofluid was prepared by using the ultrasonic dispersion method. The ammonia bubble absorption experiments with FeO nanofluid were carried out and the data of absorption height were acquired. The results showed that FeO nanofluid had an enhancing effect on mass transfer performance, and the absorption height was 2mm higher than that of the water based solution in 2 minutes of the experiment conditions. The curves of the solution temperature in absorption were also given. According to the data of the absorption height and the solution temperature, it is pointed out that there are two factors which might have negative influences on the mass transfer enhancing process.