bluuebunny/crossref_metadata_2025 huggingface dataset:
Infrared Image Real-Time Enlargement System Design Based on FPGA
Authors: Li Zhi Gang , Zhao Yu Qian
Published: February 2012

Low contrast and shortage of gray levels are two main characteristics of infrared image. According to the characteristics of infrared image, a simple and practical video format MHIVF (Mitthögskolans Interlaced Video Format) and conversion technique are introduced. This kind of video format can simplify the infrared image processing. Infrared image real-time enlargement system based on FPGA is designed and the bilinear interpolation algorithm is selected for image enlargement. The experiment results show that the designed system has a lower complexity and image processing speed is obviously increased
Corrosion Mechanism of PEO Films on AZ31 Magnesium Alloys
Authors: Wang Li , Fu Wen , Chen Li
Published: February 2012

The corrosion mechanisms of plasma electrolytic oxidation (PEO) films formed on AZ31 magnesium alloys were discussed in alkaline silicate solution. The structure and element contents of the films after immersed in 3.5 wt.% NaCl solution were investigated by SEM and EDS. The results indicated that the corrosion occurred on AZ31 magnesium alloy and the treated PEO samples during five days immersion. The corrosion procedure of the samples was depicted.
Rearch on Winning Decision’s Optimizing Algorithm for Combinatorial Bidding Purchase of Service in the Supply Chain
Authors: Ma Jin Lin , Qian Li Juan , Liu Zhi Qiang
Published: February 2012

For the actual requirements of combinatorial purchase of service in the supply chain, the process of Euclidean distance is presented in this paper to solve the winning decision problem. The method uses mixed set programming to describe all the relations and constraints in the decentralized object programming models which are different in orientation and dimension. The optimizing algorithm is designed and iterated for minimum distance to find the satisfactory solution. A numerical example confirms the validity and practicability of the algorithm
Application of Lie Group Analysis to the Plastic Torsion of Rod with the Saint Venant–Mises Yield Criterion
Authors: Li Hou Guo
Published: February 2012

Based on Lie group and Lie algebra theory, the basic principles of Lie group analysis of differential equations in mechanics are analyzed, and its validity in theory of plasticity is explained by example. For the plastic torsion of rod with variable cross section that consists in non-linear Saint Venant-Mises yield criterion, the 10-dimensional Lie algebra admitted by the equilibrium equation and yield criterion is completely solved, and invariants and group invariant solutions relative to different sub-algebras are given. At last, physical explanations of each group invariant solution are discussed by some types of transformations.
A Fingerprint Image Segmentation Method Based on Fractal Dimension
Authors: Xiang Ming , Cui Zhen Dong , Wu Yuan Hong
Published: February 2012

Fractal analysis is becoming more and more popular in image segmentation community, in which the box-counting based fractal dimension estimations are most commonly used. In this paper, a novel fractal estimation algorithm is proposed. Both the proposed algorithm and the box-counting based methods have been applied to the segmentation of texture images. The comparison results demonstrate that the fractal estimation can differentiate texture images more effectively and provide more robust segmentations
Key Technology for CBR Maintenance Resources Requirement Analysis
Authors: Chen Ling , Cheng Zhong Hua , Jia Xi Sheng , Zeng Hui Yan
Published: February 2012

In order to improve the efficiency of drawing up Maintenance Resources Requirement Analysis, we put forward to turning intelligence technique, especially CBR, which can be to applied to the process of Maintenance Resources Requirement Analysis, we introduce the analysis process of the Maintenance Resources Requirement Analysis and mainly study the means of Maintenance Resources Requirement Analysis and organization mode, CBR of key on techniques such as the representation of case, the retrieval strategy of case, the study of case etc., finally make use of solid example analysis to prove the method is possibility, for further perfect develop the system of Maintenance Resources Requirement Analysis base on case to lay a solid foundation
The Grouting Bored Pile Perfusing Pile Bearing Capacity after Effect Factors of the Finite Element Analysis
Authors: Li Shao He , Lin Qun Xian
Published: February 2012

This article take the Zhejiang some project engineering geology condition as a background, Through comparative analysis with single pile load, determine the model parameters of ANSYS finite element, The ANSYS finite element model of single pile, Respectively on the Grouting pile and Grouting for grouting of pile modulus change and Grouting in body size and changes of modulus of pile-end soils and a series of comparative analysis of the situation and analysis on bearing capacity of bored pile tip Grouting influence factors and of the main causes, draw some useful conclusions.
Research of a GA-Based Clustering K-Center Choosing Algorithm
Authors: Yang Wen Chuan , Liu Jie , Chen Ning Jun
Published: February 2012

A kind of atypical unexpected incidents hide in complaint text accompany with the telecom services. This atypical unexpected incident is defined as AUI. AUI has some special attributes as high-cohesion and space-sparse. To process the data with ordinary K-means method, the most essential thing is to find the K clustering centers accurately. Anyway, it is not guaranteed in ordinary K-means method. This work proposes an optimization using genetic algorithm. We design a fitness function, and find out the global optimal K centers. The experiment shows the most accurate clustering result.
The Lunar Virtual Reality Structure Based on CE-1 Data
Authors: Chen Jian Ping , Liu Hong Li
Published: February 2012

Up to now, the main research in china about Chang'e satellite and data sent by it is about rail orbit determination and data use, but the study concerning the Lunar Virtual Reality Structure has not appear. Based on Lunar DEM and lunar image having been done, with Super3D Editor as a platform, lunar three-dimensional virtual operating system has been completed. This paper mainly introduces the coordinate transformation, the construction of three-dimensional model and model spatial index, and provides better technology for the information extraction.
A New Constructive Method for the Concrete Strength of Existing Buildings
Authors: Chen Jian Wei , Chen Hai Bin , Su You Po
Published: February 2012

A new constructive method is proposed for the concrete strength of existing building. Nondestructive test methods for existing buildings had been widely accepted in practical engineering, the1ower and upper confidence limits are given by using the inverse regression method, then a strong-weak qualified constructive method is presented according to the confidence limits. More rational constructive results of concrete strength can be obtained than the custom methods. Furthermore, an example of practical engineering is given. The results showed that the constructive method can provide reference value for the actual engineering, establish foundation for further emendation of “technical specification for inspection of concrete compressive strength by the nondestructive methods”.
Discrete Element Simulation Analysis of Rock Slope Stability Based on UDEC
Authors: Lu Wei , Zhou Zhi , Liu Ting , Liu Yu Hang
Published: February 2012

K148+380-480 section of some certain highway is high layered dip cut slope. Weak surfaces, joints and damping load tension fissures of steep dip have significant effect on slope stability during excavation. The geological conditions and rock mass structure characteristics of the slope are analyzed in the paper. Failure patterns and deformation processes are simulated with UDEC discrete element numerical simulation software based on three-dimension (3D) and two-dimension (2D) discrete element method respectively. Besides, key factors that control slope deformation and failure are discussed.
The Design of Solar Heating System Used in Oilfield
Authors: Dong Peng Min , Zhao Bo , Zhu Zong Liang , Qiang Yong Dong , Yao Zhi Gang , Zhang Hai Dong
Published: February 2012

Based on the natural environment of YuMen oilfield, we designed solar collector and auxiliary power heating system. We lay great emphasis on the area of the collector , auxiliary electrical heating power,the volume of water tank and pipeline design in this system. After being used, this system warmth achieves the expected effect and meets the requirement of heating in severe condition such as Yumen in china.
Structure Analysis on Tube-Sheets and Heat-Transfer Tubes of PWR Steam Generator
Authors: Xu Jun Feng , Ye Jian Ping
Published: February 2012

The heat-transfer tubes and tube-sheets are the most complicated pressure parts in PWR steam generator. For analyzing the stress of heat-transfer tubes and tube-sheets, the geometry model of heat-transfer tubes and tube-sheet was constructed. The finite element grids were generated by ANSYS. According to operating temperature, the temperature field and temperature stress were calculated with ANSYS. The results show that the maximum stress is located on the inner wall of juncture of heat-transfer tubes and tube-sheet. According to the operating conditions of heat-transfer tubes and tube-sheet, the operating stress was calculated with ANSYS. The results show that stress changes on the juncture of heat-transfer tubes and tube-sheet.
Flight Path Planning Based on PSO and Minimum Threat Surface
Authors: Hu Xun Qiang , Xie Xiao Fang , Zhang Long Jie , Cao Jian
Published: February 2012

Optimal flight path is restricted within Minimum Threat Surface (MTS). With Taylor’s expansion, the horizon projection of 3D flight path within MTS is fitted with a polynomial function with finite items. So the original path planning problem is simplified to search the optimals values in the coefficient space of the polynomial function. Flight path cost model of flight path is built and PSO is applied to search optimal coefficients. Flow of optimization is introduced and validated with three simulation cases. Simulation results show that MTS and PSO can effectively solve global optimization of 3D flight path.
UGM (1,1) Model and its Application to Electric Load Forecasting
Authors: Ji Pei Rong , Huang Qiang , Zou Wei
Published: February 2012

GM (1, 1) model is a widely used model for forecasting. The characteristics of the model have been analyzed. The fact that the model is a biased exponential model has been testified. Based on the results, UGM (1, 1) model is presented in this paper. The proposed model has more extensive application scope than GM (1, 1) model for the reason that the model can limit the inherent deviation of GM (1,1) model. The proposed model is applied to the field of electric load forecasting, the actual results also show that the model is better than GM (1, 1) model.
Research of Gas Inspector Supervising System for Coal Mine Based on Call Center Technology
Authors: Shao Kang , Luan Lei
Published: February 2012

As the rapid growth of China's economy, the demand of coal resource will keep increasing for a long period in the future. At the same time, there are some safe problems in coal mine production. This paper discusses the development of gas inspector supervising system based on the research of gas inspector supervising work and the management information system principle. It benefits from the call center technology, uses voice cards to develop interactive software, developed the gas inspector supervising system for coal mine. The system realized reminding of gas inspector detecting point, detecting circuit supervision and automatic recording of the report on the time and place and other functions. Practice has proved that the system improves the supervision efficiency of gas inspector, and provides effective means for safety production management of coal mine.
Fuzzy Clustering Color Image Segmentation Algorithm Based on CPSO
Authors: Zhang Xiao Hong , Ning Hong Mei
Published: February 2012

Fuzzy C-mean algorithm (FCM) has been well used in the field of color image segmentation. But it is sensitive to initial clustering center and membership matrix, and likely converges into the local minimum, which causes the quality of image segmentation lower. By use of the properties-ergodicity, randomicity of chaos, a new image segmentation algorithm is proposed, which combines the chaos particle swarm optimization (CPSO) and FCM clustering. Some experimental results are shown that this method not only has the ability to prevent the particles to convergence to local optimum, but also has faster convergence and higher accuracy for segmentation. Using the feature distance instead of Euclidian distance, robustness of this method is enhanced.
User Scheduling in Multi-User MIMO Systems with Buffer Counting
Authors: Hang Juan , She Feng
Published: February 2012

This paper studies the user scheduling in MIMO systems with queue control. We assume the data packets are buffered at the transmitter. By modeling the channel as a queuing system, the property of queue control is analyzed. Then, user scheduling algorithm with consideration of queue state and channel state together is also investigated. Simulation results show that queue control can achieve fairness and keep stability among users
Development and Characterization of Anti-Estradiol Polyclonal Antibody
Authors: Li Chao Ying , Jiang Jin Qing
Published: February 2012

This paper reports an indirect competitive enzyme-linked immunosorbent assay (icELISA) using polyclonal antibody (pAb) for estradiol (E2) residues. After derivation, E2 haptens were conjugated to bovine serum albumin (BSA) and ovalbumin (OVA) through 1-Ethyl-3-(3-dimethylaminopropy) carbodiimide (EDC) method, and New Zealand white rabbits were immunized to produce anti-E2 pAb. The conjugation ratio of E2-BSA was proved to be 18.6:1 by an UV absorbance method. Based on the square matrix titration, an icELISA standard curve was developed. The dynamic range was from 0.16 to 128 ng/mL, with LOD and IC50 value of 0.08 ng/mL and 3.76 ng/mL, respectively. Except for a little cross-reactivity (16.2%) to estrone, this assay showed negligible cross-reactivity to other analogues tested. The results suggest that the produced anti-E2 pAb could be used to develop an icELISA method for the determination of E2 residues in animal-originally products.
Nonlinear Identification Approach of Nonlinear Constitutive Model of Soil Material with Optimization Procedure
Authors: Cao Li Juan , Shangguan Zi Chang , Li Shou Ju
Published: February 2012

Model identification of dynamic systems in the vibration engineering field has been followed with interest in recent years. A number of identification techniques on this topic are now available, such as parametric or non-parametric identification methods, time domain or frequency domain estimation approaches, etc. The identification approach of nonlinear constitutive model from input-output measurements is proposed. The inverse problem of material characterization is formulated as parameter identification problem that is solved by using optimization procedure. A set of parameters corresponding to the material property can be determined by minimizing objective function which accounts for experimental data and calculated responses of the mechanical model. The performances of the proposed identification approach were evaluated with simulating data. The effectiveness of identification approach is validated by numerical simulation. The investigation results show that the proposed identification algorithm poses good robustness and high identification precision.
The Application Research of the Matrix in Multi-Parameter Measurement FBGs
Authors: Wang Xiao Xia , Wu Chun Ying , Wang Win Lin
Published: February 2012

The sensitivity of the FBG sensor based on multi-parameter measurement was established and determined by the matrix theory. The condition number of matrix was proposed to deduced the relationship among the measurement multi-parameters of the coated FBGs. The ill-conditioned matrix parameters can be removed, and the relationship between the FBGs sensitivities and many attribute parameters of the coated-FBG was found. As indicated by the experiment, when measure the temperature and the pressure at the same time, the sensitivities of FBG is higher by coated with different thickness of copper,and the second radius is less than 0.4mm,and the FBGs sensitivities can be improved to 5~10 times.
The Swing Control of Cranes with Variable Rope Length Based on Linear Time Varying System Theory
Authors: Wang Li Fu , Kong Zhi , Wang Xin Gang , Wu Zhao Xia
Published: February 2012

In this paper, following the state-feedback stabilization for time-varying systems proposed by Wolovich, a controller is designed for the overhead cranes with a linearized parameter-varying model. The resulting closed-loop system is equivalent, via a Lyapunov transformation, to a stable time-invariant system of assigned eigenvalues. The simulation results show the validity of this method.
The Experimental about the Weak Surface Slop Deformation and Failure under Earthquake Effect
Authors: Wang Lai Gui , Yan Jie
Published: February 2012

In order to study the law of containing the weak surface slope deformation and failure under earthquake action simulate under earthquake action deformation and failure of the model which is a single weak surface slope. Use the digital speckle correlation method to deal with the experimental results, and obtain displacement and strain of the slope model. From the experimental results: it can be found the displacement and strain are concentrated in the weak surface , with the continuous vibration, eventually leading to the slope failure. The model crack firstly appears in the top of the experiment picture, and extends downward along the weak surface, thus lead to the model slip.By the experiment picture analyze the causes of the cracks.
Exploration on the Teaching of the Course of Introduction to Civil Engineering Based on Engineering Materials
Authors: Qin Peng , Qin Zhi Hai , Wang Ying Hua
Published: February 2012

with the rapid development of national economy, the construction of our country and technical personnel requirements also produced corresponding changes, the demand for interdisciplinary talents gradually increased to the higher education has put forward higher requirements. The direction of the civil engineering course reform is changed to "large civil specialty” as the basic starting point, combine with the reform of talented person training mode, adjust the students' knowledge structure. The task of introduction to civil engineering is to cultivate the students' awareness of civil engineering major, make low grade students understand the civil engineering involved in the field of the content, methods, achievements and development situation about civil engineering comprehensive from the visual angle of safe academics, social and security technology, economy and management unity. The new understanding of civil engineering specialty, enhances the student to study the interest of engineering knowledge, broaden their knowledge. According to the positioning of the course, in the teaching process optimization of teaching materials, reasonable allocation of hours, adopt the suitable way of teaching organization teaching, and achieve good teaching results
State Modeling and Verification of Resistance Loss along the Long-Range Solid-Liquid Two-Phase Pipeline
Authors: Wu Jian De , Yuan Xu Yi , Fan Yu Gang , Wang Xiao Dong
Published: February 2012

This paper studies the content from the urgent needs of production practice, it will take mechanism analysis to be a breakthrough to solve the problem of the resistance loss of complex terrain of iron ore slurry transportation. Through the analysis of past formula of pipeline resistance loss, combined with the actual characteristics of Dahongshan pipeline, correction formula of pipeline transportation resistance loss is derived. And we use the actual production data to prove the accuracy of the formula, the error is under control within 10%. The formula ignores energy loss due to the movement of particles, so the bias between the calculated and measured values still exists. But the formula still has important engineering significance.
Study on the Machining Mathematical Model and Simulation of Face-Gear with Curvilinear Shaped Teeth Based on the Local Conjugate Theory of Gearing
Authors: Wang Wen Jin , Zhang Jing , Zhao Jian , Zhang Ling Li , Wang Tai Yong
Published: February 2012

A curvilinear-tooth face-gear has been developed in order to obtain a high contact ratio, reduced bending stresses and lower sliding velocities compared to the spur and helical involute face-gear drives. The machining method for this type of gear was studied based on the differential geometry and meshing theory in this paper. The cutting mathematical model of the face-gear was established, and then the cutting simulation of the face-gear was developed.
Natural Gas Hydrate as Potential Energy Resources in the Future
Authors: Yang Xian Guo , Qin Ming Ju
Published: February 2012

On the worldwide basis, gas hydrate is about two times the total carbon in coal, oil and conventional gas in the world. The enormous size of this resource, if producible to any degree, has significant implication for worldwide clean energy supplies and global environmental issues. This paper deals with the potential of gas hydrates as a source of energy which is widely available in permafrost and oceanic sediments. It discusses methods for gas production from natural gas hydrates. Many questions remain to be answered to determine if any of this potential energy resources technically and economically viable to produce.
Research on Deformation and Stress of Concrete Face Rockfill Dam Based on Finite Element Analysis
Authors: Huo Xiang Li , Wang Bo , Huang Liang
Published: February 2012

Based on the nonlinear finite element analysis, the deformations and stresses of the CFRD in the completion and storage stages were simulated. The deformation and stress laws of the dam body and the panel in different stages were predicted. Finally, the sensitivity analysis of main parameters of the Duncan-Chang E-B model was carried out by the multiple indicators of orthogonal design method, and the critical sensitivity parameters of the deformation and stress on the CFRD were obtained. The results can take some reference for the design, construction and safety monitoring of the CFRD.
Research on Multi-Thread Schedule Algorithm of the Adjusted Pressure Casting Control System
Authors: Han Yi , Wu Chu Na , Zhao Kang
Published: February 2012

Research and analyze the multi-thread schedule methods of the adjusted pressure casting control system deeply. Present an analysis method of related slice graphs based on the code slice and a theory of code subdivision based on the slice granularity and time slice. Then strictly divide the program of control system based on the time slice and obtain the strategies of event driven schedule and time slice schedule by analyzing the casting system. Subsequently, subdivide and recombine the multi-thread program slices based on the priority of the schedule strategies in control system. The control system was applied to the TYM-1 adjusted pressure casting system and the preferable effect is acquired.
On-Line Adaptation to Illumination Change for Mobile Robot Based on Omni-Directional Vision
Authors: Luan Xin , Qi Wei Wei , Zhu Tie Yi , Yu Fang Jie , Song Da Lei
Published: February 2012

In this paper a method of on-line adaptation to illumination is proposed for mobile robot based on omni-directional in a changing illumination environment. Illumination condition is represented by an average luminance distribution of a reference object in a time series images. Illumination change is detected by computing the KL-divergence between two different distributions. A dual-threshold strategy is used to classify the current illumination into known conditions or an unknown one. According to illumination the robot decides to switch to a corresponding color calibration or learn a new one. Experiments have been carried out on the soccer robot M-TR. Experimental results show the efficiency of the proposed method.
The Dynamic Dent Resistance Analysis of Automotive Hood Outer Panel
Authors: Han Shan Ling , Yu Li Sha , Yang Lei , Zeng Qing Liang
Published: February 2012

Dent resistance of automobile panels becomes an important issue and quality criterion. In this paper, the dynamic dent resistance of automotive hood outer panel is analyzed by means of finite element method. The geometric model of automotive hood outer panel is firstly established by UG software. Then the finite element model of automotive hood outer panel is established in ANSYS. The dynamic dent resistance of automotive hood outer panel is analyzed by simulating the collision between a rigid ball and an automotive hood outer panel. The results show that compared with the traditional steel panel, the automotive hood outer panel made of aluminum alloy can reduce its weight by 36.3% while meeting the requirement of dynamic dent resistance. It is concluded that making automotive hood outer panel by aluminum alloy is feasible for automobile lightweight.
Design of On-Line Monitoring System for Transformer Oil Chromatogram and its Data Analysis
Authors: Liang Li , Wang Ning , Ma Xiao Chang , Liu Zhen
Published: February 2012

On-line monitoring system of transformer oil chromatogram works in laboratory. Using the basic principles of gas chromatography (GC) of the broad spectrum, the system provides online-testing of dissolving gases from oil with a single gas chromatographic column and sensors with high sensitivity. The single-chip is used to collect the data and control transformers. The main controlling computer realizes the function of analyzing and managing the collected data, by which transformer fault can be judged.
Research on Geometric Error Compensating Technique of CNC P3G Grinding Machine
Authors: Jian Yi , Li Qian Qian , Cheng Hong , Lai Bin Wu , Zhang Jian Fei
Published: February 2012

Kinematic accuracy is a key reason which influence workpiece's geometric error precision on traditional working process of precisely CNC（Computerized Numerical Control）P3G（polygon profile with 3 lobes） grinding machine. A systematic geometric error model has been presented for CNC P3G grinding machine， proposed multi-body system theory integrate with the structure of CNC P3G grinding machine tools, researched on the machine's space geometric errors. By means of separate geometric errors from the machine tools, build geometric mathematical error model. Then, identify 21 error parameters through method of 9 lines, analysis and calculate the total space geometric errors of the workpiece and wheel. Finally, formed a parameter-list and applied software error compensational technique ， achieved real-time control to the motions of workpiece and wheel. Experimental results shown that the geometrical error modeling technique is accurate and efficient, and the precision of CNC P3G grinding machine is highly raised 70%.
Influence of Large Turbo-Generator Stator Ventilation Ducts Structural Changes on Stator Temperature
Authors: Huo Fei Yang , Sun Jia Hui , Li Wei Li , Zhang Yi Huang
Published: February 2012

For the complex status of fluid flow in stator radial ventilation ducts of large turbo-generator, the temperature distribution of stator is dramatically affected by the flow status of cooling medium in stator ventilating ducts. In this paper, a new ventilating ducts structure in stator is investigated. According to fixing a wind deflector on the stator teeth adjacent to the ventilation ducts, the fluid flow status of cooling air is changed flowing in stator ventilation ducts. For this reason, the effect of heat transfer in stator is changed. Taking an air-cooled turbo-generator as an example, considering the characteristics of fluid flow and heat transfer in turbo-generator ventilation system, the three-dimensional fluid flow and heat transfer coupling model is established. Using finite volume method, three-dimensional fluid field and temperature field control equations are coupling solved. Based on this, the velocity distribution in ventilating ducts is obtained. Besides that, the velocity distribution is studied with the cooling air flows into radial ventilation ducts at different incident angles. The influences of wind deflector and incident angles on the fluid velocity and temperature distribution are analyzed. Based on that, some useful conclusions are obtained.
Microfabricated Fiber Probe by Combination of Electric Arc Discharge and Chemical Etching Techniques
Authors: Mukhtar Wan Maisarah , Menon P. Susthitha , Shaari Sahbudin
Published: February 2012

In this study, optical fiber probes were fabricated by combination of electric arc discharge and chemical etching techniques. Size of tips diameters fabricated using different etching solutions were observed. When the optical fibers were pulled and heated by the electric arc discharge using a fusion splicer, fiber tips with few microns in diameter were obtained. To minimize the tips diameter, the pulled fiber probes were etched vertically for 10 minutes using two different etching solutions namely 49% HF and HF buffer solution (49% HF and 40% NH4F) with ratio of 2:1. A thick overlayer was added on top of the HF solution to prevent dangerous vapors escape to the environment. When the tapered part of the pulled fiber (FP1) was dipped into 49% HF solution, the diameter of tip was slightly decreased from 4.41μm to 1.31μm with etching rate of 5.17x10-3 μms-1. When the pulled fiber (FP2) was etched into HF buffer solution, the etching rate was increased up to 52.35% with the etching rate of 10.85x10-3μms-1. The tip diameter was reduced from 7.01μm to 468.9 nm in diameter. Combination of “heat and pull” technique with chemical etching by using HF buffer solution produced fiber probe with small tip diameter.
The Application of Simulated Annealing in Chiller Energy Consumption Optimization
Authors: Li Bin Fei , Song Yan Min , Pei Jun , Yang Jing Min
Published: February 2012

This paper based on the energy consumption simulation model of chiller system, by analyzing the composition of chiller energy consumption, proposes to compute the best optimal controlling parameters by using simulated annealing algorithm in order to reduce energy consumption. The optimizing process of the best settings of each controllable variable is introduced which use the simulated annealing algorithm in the running chiller system, and the effects of simulated annealing running has been simulated.
Mathematical Model of Spherical Gears with Helix Traces
Authors: Su Jin Zhan , Fang Zong De
Published: February 2012

Spherical gears with helix tooth traces are proposed to enhance loaded capacity and improve the sensitivity to assembly errors. The hobbing process for spherical gears is illustrated, and then developed the mathematical model of imaginary rack cutter. The tooth surface mode of spherical gears was developed by coordinate translation and gearing theory. Finally, the paper presents a numerical example to validate the proposed new spherical gears drive
The Temperature Control Simulation on Concrete Dam Simulation Analysis of the Concrete Block in First-Stage Water Cooling
Authors: Kang Ying Bin , Bian Hui Xia
Published: February 2012

Control the concrete temperature to reduce the temperature cracks is one of the main tasks in the concrete dam construction. Water cooling is the most effective temperature control measure of concrete dam. In connection with the concrete temperature field of cooled computational problems, according to the water and heat exchange between the concrete and cooling water pipes, The cooling pipe is considered as the effect source of heat, and the effect of the water cooling is considered on average meaning, and then the approximate temperature field can be obtained through the finite element.
Simulation and Optimization of Melted Iron Desulfurization Process in Torpedo with Blowing Gas and Spray
Authors: Huang Ao , Zhang Mei Jie , Gu Hua Zhi
Published: February 2012

According to the practical physical dimension and processing parameters of torpedo in a factory, Eulerian multiphase model was applied and adopting porous media model for the gas flow through the porous refractory, desulphurization process model was coupled, the desulphurization process of melted iron in torpedo with bottom blowing were computed using mathematical simulation approach, effect of bottom blowing technique was discussed. The results show that: Compared with the desulphurization behavior of melted iron in torpedo without bottom blowing, porous refractories were located at the bottom of torpedo in order to mixing melted iron by blowing gas, even using 30m3/h gas flow rate, desulphurizing result is improved. As the gas flow rate increased, the desulphurizing result become better. The desulphurizing result of bottom blowing between inlet and the end at the bottom of torpedo is better, especially the position of 2500mm. Blowing in 260s after the end of dust can avoid resulfuring and decrease sulfur content.
Modeling and Simulation of Passive Vibration Isolation System of Combustion Engine with Flexible Base
Authors: Zhao Guo Qian , Zhang Hong Tian , Geng Rui Guang
Published: February 2012

Based on multi-body dynamics, finite element method and solid modeling technology, a dynamic model combined rigid bodies and flexible bodies about passive vibration isolation system of combustion engine with flexible base was built. A simulation analysis was done for a passive vibration isolation system of four-cylinder diesel supported on a flexible flat plate. Simulation result showed static balance and exciting force were same with theory calculation. Through changing support stiffness between flexible flat plate and ground, boundary condition of flexible base could be changed. And the characteristics of vibration isolation were obtained when combustion engine’s flexible base had different stiffness. Compared bearing force of vibration isolator on flexible base with bearing force on rigid base, the results could be gotten that flexible base had important influence to bearing force of vibration isolator and free vibration influenced by base’s flexibility might become main factor to influence change of vibration isolator’s bearing force.
Model Building of Finite Element Analysis Based on ANSYS of Column Jib Crane
Authors: Ma Xiao , Cheng Xue Li
Published: February 2012

To improve design accuracy and shorten its cycle, finite element method is adopted in the process of crane designing. The integrated finite element analysis model was established for the whole column jib crane using finite element analysis software ANSYS. A feasible computational model which reflects the actual structure was built and displacement boundary condition was determined reasonably. By using the symmetries of structure and load, neglecting the specific structure of bearing but reserving motion relationship between slewing jib spindle and column bearing chamber, the model is simplified logically. The slewing jib, which has great stress gradient, was separated into two parts while its interface was maintained for different density when meshing. The model calculation results are in very good agreement with actual conditions which provide a theory basis for optimal design of integrated structure of column jib crane and modeling for products with similar structure.
Research on Transient Fuel-Film Compensation Control Strategy for a Port-Fuel-Injected Engine
Authors: Zhou Jian Hao , Yuan Yin Nan , Wu Kai , Du Jia Yi
Published: February 2012

The fuel-film evaporation model and transient fuel-film compensator model were established. By virtue of Simulink, the validity of above models were verified. The square wave perturbation method was introduced. Basing numerous calibration, the fuel-film compensation strategy including zoned compensation and damping factors ware proposed. This new strategy can compensate in-cylinder fuel fluctuation effectively during transient conditions.
Design of Thin Film Electroluminescent (TFEL) Display Panel Driver
Authors: Feng Ran , Yang Xiao , Huan Xuan
Published: February 2012

By doing research on the optical characteristics of TFEL panel, a driver circuit controlled by Field-Programmable Gate Array(FPGA) is designed. This design adopts an unsymmetrical way to lighten the panel which is different from the custom symmetrical hybrids. The availability of this unsymmetrical structure improves the stability when the system is on the high-voltage condition, prolongs the service life of the driver circuit, and significantly reduces the costs of a TFEL display system.
Back Analysis for Rock Mechanical Parameters and Calculation of Ground Stress Based on GA-FLAC3D
Authors: Zhang Ze , Zhao Tong Bin , Tan Yun Liang , Zhang Chong Guang
Published: February 2012

In order to obtain the stress distribution in deep level of Datai mine, a nonlinear back analysis method for rock mechanical parameters was proposed by combining genetic algorithm and FLAC3D (GA-FLAC3D). First the hollow inclusion stress gauge (stress relieving method) was used to complete the measurement of local in-situ stress; and then the rock mechanical parameters were obtained by using back analysis; at last the ground stress in deep level was obtained. The results showed, this method is quick in calculation, and has global convergence. The convergence accuracy of normal stress is about 90%.
Computer-Aided Homology Modeling of TbpA Protein from Actinobacillus pleuropneumoniae
Authors: Li Ren Feng , Zhao Kun , Li Xue Bin , Jiang Jin Qing , Wang San Hu
Published: February 2012

TbpA is a highly conserved transmembrane protein that may serve as a channel for transport of iron across the outer membrane, which is required for transferrin utilization and is responsible for removing the iron from transferrin and for transporting iron across the outer membrane in a TonB-dependent manner. In the present study, a 3D homology modeling of TbpA from Actinobacillus pleuropneumoniae (App) L20 strain, based upon the Crystal structure of the hemehemoglobin outer membrane transporter ShuA from Shigella dysenteriae (PDB code: 3fhh) was performed using bioinformatics tools, as no experimental 3D structures. The program VERIFY 3D assessed the quality of the predicted structure of TbpA with acceptable scores. All the results converged to the fact that the predicted 3-Dimenrsional structure of TbpA is of good quality with acceptable scores.
Study on Conditions of Over-the-Horizon Detection Basing on Evaporation Duct
Authors: Zhu Ming Yi , Guo Tao
Published: February 2012

The highest frequency duct is evaporation duct under marine atmospheric environment, and it is a special method of expanding the radar measuring range by using the evaporation duct to achieve the over-the-horizon detection. On what conditions to ensure the realization of the over-the-horizon radar detection is one of key problems. Many aspects, such as evaporation duct discrimination, radar working wavelength and frequency, initial launching angle and the location of radar are studied to get the necessary conditions of the over-the-horizon radar detection. The results show that the four kinds of necessary conditions must meet at the same time instead of only one certain condition, which lays a necessary foundation for the marine radar, ship radar and communication system to exert the largest effects in the evaporation duct environment.
An Efficient M-Ary Modulation Technique Using Single Linear Chirp Signal
Authors: Meng Fan Yu , Gu Xue Mai , Guo Qing
Published: February 2012

In recent years, as the indoor wireless communication has gained increasing attention, various kinds of wireless communication techniques have developed rapidly to obtain a better system performance. Chirp signal is also noticed again due to the feature of low power consumption, high processing gain and low cost. A novel M-ary chirp modulation technique is proposed in this paper to increase the system performance both under AWGN channel and indoor wireless channel. Optimal linear chirp signals are designed in this system to reduce the cross correlation, and simplify the complexity of the system. Simulation shows that, compared with the binary orthogonality modulation technique, the M-ary chirp modulation technique using optimal linear chirp signal has a high data rate with a reasonable BER both under AWGN channel and indoor wireless channel.
Modeling of the Diode for Electromagnetic Compatibility (EMC) Based on Saber
Authors: Yang Tian Peng , Ma Qi Shuang
Published: February 2012

The diode model for EMC is built on the basis of lumped charge model. The model consists of forward recovery, reverse recovery and carrier recombination and is completed by MAST modeling language in Saber. The simulation results show that this model describes the forward and reverse recovery correctly.
Proton Exchange Membrane Fuel Cell Lumped Modeling and Simulation
Authors: Jia Qiu Hong , Han Ming , Liao Lin Qing , Xiao Yan
Published: February 2012

It analyzes in detail the influence factor of voltage of proton exchange membrane fuel cell (PEMFC) when load changes sudden by the lumped modeling developed. The partial pressure of hydrogen and oxygen can be expressed using the ideal gas law equation, and ohmic loss, activation loss and concentration losses are accounted, it is assumed that both operating factor of hydrogen and mixture ratio of hydrogen and oxygen are constant. Based on the above, the dynamic lumped model of PEMFC is proposed. The correctness of model is verified by comparing the experiment data with simulation result of model. The research about lumped model has important significance to the research of the distributed generation network in various performances.
Analysis of Silicon-On-Insulator (SOI) Buried Waveguide Phase Modulator
Authors: Hanim Abdul Razak , Hazura Haroon , Mardiana Bidin , Sahbudin Shaari , Menon P. Susthitha
Published: February 2012

The analyses of the simulation of a single mode buried waveguide optical phase modulator based on SOI material are here reported. The structure has been simulated by Athena from Silvaco simulation package. The buried waveguide is created by doping phosphorus with concentration of 10e15 cm-3 into the substrate. The real refractive index and the absorption coefficient of the waveguide are changed using the free carrier dispersion effect via carrier injection of a pn junction. The efficiency, VπLπ is calculated and the performance is compared with that of the rib waveguide optical phase modulator of the same material and dimensions. Simulation shows that the device can be an efficient device for application in intensity modulation.
A Gamut Boundary Description Method Based on Graham Algorithm for Laser TV
Authors: Zhang Nian Wu , Song Gang , Li Hua
Published: February 2012

To take full advantage of high brightness, wide color gamut and high saturation of the Laser TV, kinds of gamut expansion methods emerged. Most of the methods are based on the hue unchangeable principle. So before gamut expansion, the boundary of Laser TV gamut and that of current display standard gamut should be first obtained. But the traditional method for getting the device color gamut based on physical model was not accurate enough for the Laser TV gamut expansion. Based on this situation, An improved gamut boundary description method based on graham algorithm for laser TV was proposed in this paper. The method first used Convex Hull Algorithm to detect the edge points on the convex edge, and then through multiple iterations to calculate the Concave edge points between the convex edge points. Result of experiment on the CIE L*a*b* color space showed this kind of method could give a more accurate description of the Laser TV gamut boundary.
New Ways of Improving the Property of the Piezoelectric Fluidic Angular Rate Sensor
Authors: Yu Quan Gang , Piao Lin Hua , Wang Xing
Published: February 2012

New ways of improving the property of the piezoelectric fluidic angular rate sensor are described in the paper. According to the improved schemes of the structure and the process, the repeatability of null voltage, the cross-coupling and stability of the sensor are improved. The numerical results have shown that the repeatability of null voltage increases from 0.2°/S to 0.1°/S and the cross-coupling decreases from 2% to 1%.
Research of the Application of Virtual Reality in Green Construction
Authors: Si Hai Fei , Yang Zhong
Published: February 2012

Virtual Reality technology is wild applied in various fields with its development. This article studied the application of virtual reality technology in green construction. On the discussion of the utility of desktop virtual reality system to accomplish the three-dimensional real-time simulation of green construction project, it shows that the application of virtual reality technology in the simulation of green construction not only reduces the construction cost but also breaks the limitation of time and space. The research of this paper has very high applied value.
Testing and Analysis on Vibration Isolation Performance of Vehicle Engine Mounting System
Authors: Dai Chao , Liang Ji Hui
Published: February 2012

Aiming at the vibration test of the power train mounting system of certain light truck, a vibration test is performed, and vibration response at each testing point of the system is obtained in different conditions. Data is processed based on Matlab software, to display the time domain and the frequency domain response in an image way in each testing condition. The energy transfer efficiency of each mounting point, the vibration frequency domain response property, and the vibration intensities of the variable-speed joystick and the steering wheel in three directions are analyzed, a parameter design optimize proposal on the mounting system is proposed, and the vibration isolation effect can be improved by reasonably selecting parameters.
A New Thin-Film Piezoelectric Sensor for Easuring Methane Gas
Authors: Tong Min Ming , Li Ying , Tang Shou Feng , Han Fei
Published: February 2012

To measure the concentration of CH4, we developed a thin film piezoelectric acoustic sensor (TFPAS), it accomplishes the detection of CH4 by the absorption of CH4 which can change the oscillation frequency of the piezoelectric crystal. The sensor is mainly composed by the piezoelectric film, sensitive film, silicon substrate and electrodes. The sensitive film is made up of nanometer-sized MgO scattered on pitch-based activated carbon fibers which has a strong adsorption of CH4. The piezoelectric film is a ZnO film which has very high piezoelectric characteristic parameters. The experimental results show that the sensitivity of the sensor to CH4 is very high. The response of the sensor to the presence of CH4 tested was found to be linear within a certain detection range and the detection error is less than 5%.
ZnO Thin Film Sensor Design of the Charge Amplifier
Authors: Sun Hui Qin
Published: February 2012

The ZnO film as the material, the charge amplifier and the accelerometer in one set, to record and display the measurement data directly, simplifying the testing system to improve the test accuracy and reliability. Charge amplifier circuit is designed to be simple, easy to debug, high integration, low cost, favorable ZnO thin films driven by the widespread use of the accelerometer.
Appropriate Control Measures of Heating System Pipe Network Analysis Technology
Authors: Li Lian You
Published: February 2012

According to basic foundation match of supplying heat in heat source and getting heat in hot users, the article gives analysis and discussion of heating system in hydraulic calculation and adjusting characteristics such as network optimization analysis and Optimal control of network, offers some methods in changing passive adjusting ways of individual metered heating system.