bluuebunny/crossref_metadata_2025 huggingface dataset:
Testing and Control for Strands Embedded in Annular Concrete Foundation Beam of Steel Archaize Tower
Authors: Li Xiao Ke , Liu Jian , Wang Zhi Hao , Han Peng Fei
Published: November 2012

Combined with the design and construction of annular pre-stressed concrete foundation beam of Tiantang Site Protection Exhibition Project in Luoyang, China, this paper introduces the test process of frictional lose for annular strands. The calculation method is given to deal with the original data to get the friction coefficient of the strands. The controlling parameters such as control tensioning stress and theoretical elongations of strands are advised. The rational pre-stressing process and key indexes are confirmed by the comparison of test and theoretical circumferential stresses of the foundation beam. It is reasonable to fulfill the design requirements by strict controlling in the fields. It is believed that the process and method in this paper would give some reference for the construction of similar annular pre-stressed concrete structures.
Rhombus Cradle System Checking Computation of Jinqinggang Bridge
Authors: Liu Shi Ming , Yang Zu Lin , Zhao Hui
Published: November 2012

In order to be sure the safety of rhombus cradle system during the concretes cantilever cast-in-place construction, the paper makes use of probabilistic limit state method, and carries out the checking computation. According to the rhombus cradle design drawings of the Jinqinggang bridge and the actual load case, the analytical model is founded through the finite element analysis software MIDAS/CIVIL. The results show that stress of all parts of the rhombus cradle system and the concrete local pressure stress is less than the corresponding material design value, and the safety factor of anchor rod tensile stress is less than 2.0 which should be strengthened, and the deformation of the steel moulding plate is less than 20mm.
Simulation of Composite Strengthening Technique in Prestressed Concrete Continuous Box Beam Bridges
Authors: Jiao Hong Bo , He Shuang Hua
Published: November 2012

The damage features of concrete continuous box beam bridges are summarized combined with three prestressed concrete continuous box beam bridges on ZhengLuo highway. There are four common strengthening methods in bridge engineering practice, i.e. bonded steel plates, strengthening with R.C, carbon fiber reinforced polymer (CFRP) and external prestressed strands. By numerical analysis technique of three dimension finite element (3D FE), the stresses of the damaged bridge are compared with the results of the strengthened one which is strengthened by one of the former methods. The strengthening effectiveness of those methods is ascertained. Therefore, the composite strengthening technique (CST) is established, which is effective to improve the bearing capacity and crack resistance of the strengthened bridge. An optimal strengthening process is put forward in the paper. So the CST is reasonable and effective to strengthen a damaged prestressed concrete continuous box beam bridge, which provides a significant reference for other similar strengthening projects.
Effect of Pile-Soil Action on Seismic Resistance of Prestressed Continuous Box-Girder Bridge with Changed Sections
Authors: Li Feng Lan , Zhang Shi Min , Liu Shi Ming
Published: November 2012

Combined with the design of a bridge with prestressed concrete continuous box-girder, and in accordance with the Chinese guidelines of seismic design for highway bridge, the numerical models with and without considering the pile-soil action were built using Midas Civil software. The response spectrum method was used to analyze the seismic response of the bridge under E1 and E2 seismic actions. The vibration characteristics such as frequency, period and mode as well as the internal forces and displacements of piers are discussed in view of the effect of the pile-soil action.
Research on Non-Quantification Risk Factors Control and Management of Bridges during Construction
Authors: Li Qing Fu , Fu Hao , Gan Wei Kang
Published: November 2012

Proceed with manual work, materials and machinery, non-quantification risk factors control and management method of bridges during construction is studied. The results indicate that the key of controlling unquantifiable risk factors lies on supervision of careless mistake and accident, making clear responsibility, preparing measures of remediation for problems that may occur and minimizing negative influence of project risk by subjective factors which can be controlled. Research achievement can ensure bridge construction quality and safety, and then provide technical contribution.
Numerical Analysis of Effect of Blasting Vibration on Adjacent Roadway in 858 Mines
Authors: Wang Guang Yong , Liu Jun Chao
Published: November 2012

In order to avoid the effect of driving blasting on the adjacent roadway in 858 mines, numerical analysis of seismic intention was carried out. Based on monitoring data, the parameters suitable for local were obtained by Sadov's formula, by which the relationship between the maximum single-stage charge and the width of protect rock pillar were offered. According to design requirements, and considering the effect of driving blasting on the adjacent roadway, the maximum single-stage charge of driving blasting is 43.99kg.
Square-Shaped Nd2Sn2O7 Nanocrystals Prepared by Salt-Assistant Combustion Method
Authors: Tong Yu Ping , Chen Xi , Zhao Shun Bo , Lu Lu De
Published: November 2012

Ultrafine square-shaped pyrochlore-type Nd2Sn2O7 nanocrystals were synthesized by a convenient salt-assisted combustion process using glycine as fuel. The products were characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), Raman spectroscopy, Transmission electron microscopy (TEM) and high-resolution transmission electron microscopy (HRTEM). The results indicate that the products are phase-pure nanocrystals with pyrochlore-type structure. TEM and HRTEM images reveal that the products are composed of well-dispersed square-shaped Nd2Sn2O7 nanocrystals with the average size of 30 nm and the crystallite is structurally uniform and crystalline. The presented method provides a convenient and low-cost route for the synthesis of oxide materials nanostructures.
The Seismic Behavior of High-Strength Concrete Frame Joints
Authors: Wang Ting Yan , Zhang Jun Wei , Gao Dan Ying
Published: November 2012

By studying the two high-strength concrete frame joints by means of experimental investigate and finite element analysis with the low cycle reversed loading method, it discussed the influence of the steel fiber on the seismic behavior of the high-strength frame joints. The result shows that, mixed with steel fiber can enhance the constraint of the concrete at the joint core area, improve the seismic behavior. Amount of steel fiber can replace part of the stirrup.
Study on Relationship of Seismic and Pseudo Response Spectrums
Authors: Chen Gong Lian , Liu Wen Feng , Li Gang
Published: November 2012

153 seismic waves were input into the elastic-dynamic differential equations of single degree of freedom system, the acceleration response spectrum, velocity response spectrum and displacement response spectrum in different site characteristic periods were obtained. According to the pseudo-dynamic relationship between acceleration, velocity and displacement response spectrum, the pseudo response spectra were obtained by the deduction of the 3 real response spectra from the frequency relation. Compared with the value of the real and the pseudo response spectra, the basic characteristics and differences were studied, the correction formulas of the difference between the real response spectrum and the pseudo response spectrum were obtained, the correction formula will contribute to the development of performance based seismic design theory.
Mechanical Properties Research on Concrete Block Doped Nano-TiO2 under the Conditions of Common Conservation
Authors: Deng Zhi Yong
Published: November 2012

As a new high performance construction material, concrete doped nano-TiO2 greatly expanded its application in engineering with the advantages of high strength and high durability. By compressive test of concrete block doped nano-TiO2 under the conditions of common conservation, this paper respectively studies the regulation of compressive properties of the concrete block affected by the factors such as concrete strength and nano-TiO2 dioxide.
LMI-Based Robust Control of Norm-Bounded Uncertain Perturbed Discrete Systems with both State and Input Delays
Authors: Li Yang
Published: November 2012

This paper is concerned with the problem of norm-bounded uncertain perturbed discrete systems(NUPDS) with both state and input delays.Based on constructing a quadratic Lyapunov function, a delay-dependent criteria, which is expressed in terms of linear matrix inequalities(LMIs), has been proposed to guarantee the asymptotic stability of the system.Compared with existed open literature, this paper suggests a novel controller design method , which deals with more aspects including time-varying parameter uncertainties, perturbation, state and input time-delays.In addition, we also consider the condition of operating region is outer approximated by extended ellipsoids, which can be ultilized for dealing with the perburbed term of the system. The solution of the LMIs can be obtained easily by using existed efficient convex optimization techniques. In the end, a numerical example is given to illustrate the effectiveness of the proposed theoretical result.
Agile Turn Control for Air-to-Air Missile Based on Reaction Jet Control System
Authors: Ma Yue Yue , Tang Sheng Jing
Published: November 2012

This paper focuses on agile turn control for air-to-air missile flying in the horizontal plane. The attitude dynamics is discussed and variable structure control (VSC) method for attitude control is analyzed. After analysis of the dynamic function about velocity angle, a staged control method using VSC based on reaction jet control system (RCS) is proposed to achieve fast change of velocity direction and attitude in a short time. The simplex method is used for trajectory optimization. The simulation results show the feasibility of the staged control method which makes the missile turn faster than the situation of attitude control method. The new method demonstrates that RCS is able to control the missile to realize 180°change both for the velocity angle and attitude angle.
High-Order Distributed Consensus with One-Bit Adaptive Quantization
Authors: Wang Wen Kai , Peng Huan Xin
Published: November 2012

The convergence performance of distributed consensus algorithm with adaptive quantization communication depends on the convergence rate of the distributed consensus algorithm. In order to improve the convergence performance of distributed consensus under adaptive quantization communication, based on the one-bit adaptive quantization scheme, we propose the high-order distributed consensus to update the state of every node. We analyze the convergence performance and calculate the mean square error of the high-order distributed consensus algorithm with one-bit adaptive quantization. The high-order distributed consensus with one-bit adaptive quantization achieves a consensus in a mean square sense. Simultaneously, Simulations are done about the high-order distributed consensus based on one-bit adaptive quantization. Results show that the high-order distributed consensus algorithm based on one-bit adaptive quantization can reach an average consensus, and its convergence rate is higher than those of the first-order adaptive quantized distributed consensus algorithm and second-order adaptive quantized distributed consensus algorithm.
Research on Attitude and Position Tracking Algorithm of Drill Bit for Underwater Mud-Penetrator
Authors: Yang Ke , Ge Tong , Wang Xu Yang
Published: November 2012

This paper proposed a navigation algorithm based on indirect extended kalman filter. The algorithm adopted state error model based on sensor random walk and chose low frequency value of acceleration and angular velocity as observation. The extended kalman filter was used to calculate the optimal estimation of state error which can be used to correct the predicted value of state. IMU7200 and encoder provide acceleration, angular velocity and velocity for drill bit. Marine experiments in the East China Sea show that the proposed algorithm can successfully implement with an accurate and reliable performance.
Research on Dissolved Oxygen Intelligent Control System in Waste Water Treatment
Authors: Sun Hong Xing , Gao Chuang , Li Na
Published: November 2012

By combining with the research hot spot of intelligent control, the oxygen fuzzy-single neuron PID compound controller is designed based on control increment. It contains the advantages of fuzzy controller and the single neuron PID controller. The problem of causing the oscillation in switching two kinds of controllers is solved. The results of the dissolved oxygen fuzzy-single neurons PID controller and fuzzy controller simulation are compared. The results show that the control effect of dissolved oxygen is more ideal. Thus the algorithm is effective and feasible.
Study on the Addressing Mode of Assembly Language Instruction Set of 80C51 MCU
Authors: Sun Bao Fa
Published: November 2012

The addressing mode of assembly language instruction set of 80C51 MCU is redefined. The addressing mode is classified according to two standards separately. The addressing mode is the method decrypting operand address in the instruction, or finding the next instruction address. The mode to find the operand address includes direct addressing, register addressing, register indirect addressing and base address plus index indirect addressing. The mode to find the next instruction address includes sequential addressing, base address plus index indirect addressing and relative addressing.
The Improved Design for Automatic Feeding Mechanism of the Injection Molding Machine for the Negative Electrode Shell of Li/Mn02 Button Cell Battery Based on TRIZ Confliction Theory
Authors: Zhang Xue Dong , Lin Shu Zhong
Published: November 2012

According to the existing problems of the automatic feeding mechanism of the injection molding machine, we used TRIZ confliction theory to improve the design. We installed original mention feeding platform on the shock hopper directly, raised the height of the cover and removed the gliding path to solve the problems of equipment which is need to be improved such as maintenance, debugging difficulties, which are maybe lead to instability of the equipment operation. This improvement not only simplifies the structure of the automatic feeding mechanism of the injection molding machine, but also reduces the cost. The automatic feeding mechanism of the injection molding machine, replacing a person, has improved the efficiency and reduced the cost of the button cell battery.
Pseudo Two-Hop Distributed Consensus Algorithm under Directed Topologies
Authors: Peng Huan Xin , Wang Wen Kai
Published: November 2012

In this paper, we propose the pseudo two-hop distributed consensus algorithm under directed communication topologies. The convergence performance of the pseudo two-hop distributed consensus algorithm under directed communication topologies are analyzed, and the convergence conditions for the pseudo two-hop distributed consensus algorithm are given. In particular, the convergence rate is determined by the spectral radius of the matrix depend on the communication topology. Finally, simulation results are provided to verify these analytical results.
The Drawing Simulation for Configuration of the Articulated Industrial Robot Based on UG
Authors: Liu Ping , Wang Wen Xia
Published: November 2012

This paper proposes a drawing simulating method by means of drawing out coordinated system and relevant object for every link of the articulated industrial robot in UG system. Because the structural and kinematical parameters are defined with variable element in UG system, the conFiguration of terminal link and other link are all simulated. It is appearance that the drawing course by this way is simple and the drawing result of the articulated industrial robot is visual, believable and reliable.
A Novel Three-Phase AC/AC Converter Using Six Switches
Authors: Chen Tsung Cheng , Chiou Gwo Jen , Yang Chen Chih , Chen Jeng Yue
Published: November 2012

In this paper, a novel three-phase AC/AC converter is proposed. The proposed converter consists of six power switches, three capacitors, three input inductors and three output inductors. The proposed converter has several advantages such as sinusoidal input-output current, adjustable frequency, unity input power factor and lower switch cost etc. Based on the sinusoidal pulse width modulation techniques and zero vector control strategy, the converter combines three-phase AC/DC converter and three-phase DC/AC inverter to generate a single-stage converter controlled in the same period. By fixed capacitor ratio, the duty functions of converter and inverter are operated in optimum period for more stable control. The software VisSim and TI TMS320F2812 are adopted to implement the proposed converter. Besides, the mathematic model of the proposed converter is established by the state average technique. Finally, some experimental results are compared with the proposed theory for verification.
Process Monitoring and Fault Diagnosis of Penicillin Fermentation Based on Improved MICA
Authors: Jia Zhi Yang , Wang Pu , Gao Xue Jin
Published: November 2012

In the process monitoring and fault diagnosis of batch processes, traditional principal component analysis (PCA) and least-squares (PLS), are assuming that the process variables are multivariate Gaussian distribution. But in the practical industrial process, the data observed of process variables do not necessarily be the multivariate Gaussian distribution. Independent component analysis (ICA), as a higher-order statistical method, is more suitable for dynamic systems. Observational data are decomposed into a linear combination of the independent components under statistical significance. The higher order statistics will be extracted and the mixed signals are decomposed into independent non-Gaussian components. Traditional method of ICA has to predefine the number of independent components. This paper proposed an improved MICA method of realizing the automatically choosing the independent components through setting the threshold value of the negentropy. The method can solve the problem of predefining the number of independent components in traditional methods and meanwhile it reduces the complexity of the monitoring model. The proposed method is used to do the process monitoring and fault diagnosis of penicillin fermentation and the results verify the feasibility and effectiveness of the method.
Hydraulic Focusing Stability Detection Method Study Based on Digital Image Processing Technology
Authors: Xiao Lu , Zhang Lu , Zhao Hong , Chen Wei , Yuan Li
Published: November 2012

Hydraulic focusing technology is an important method in many researches about particles. But there is no reported direct real-time detection method to survey its stability. A novel and high resolution method is put forward, which is based on digital image processing technology to detect hydraulic focusing stability. And five parameters are designed to assess its stable performance. A set of experiments is implemented with different sample and buffer hydraulic focusing forming velocities, and the results and experimental error are discussed seriously. The conclusion can be drawn by the final experimental error analysis which is less than during all the detection course. It can be proved that this hydraulic focusing stability detection method based on digital image process technology has the advantages of the excellent precision, the fast processing speed and the good reliability.
Optimization of the FSAE Car Steering Trapezoid
Authors: Liu Ze Peng , Zhu Gang , Li Jie , Yu Shan Hu
Published: November 2012

Steering system is important to the FSAE vehicle performance. And it’s necessary to optimize the steering trapezoid as well. According to the mentioned problem, the steering trapezoid is designed for the special circumstances of the track in this article. the steering mathematical model is established and optimized using the least squares method in the MATLAB Optimization Toolbox to improve the steering stability of the car. After manufacturing and testing the FSAE car prototype, the experimental and optimal results are compared, which indicates that the design of the steering trapezoid mechanism reduce tire wear and protect good steering and grip performance.
Blasting Demolition Technology and Vibration Monitoring of Two 90m-High Cooling Towers in Complex Environment
Authors: Xu Shun Xiang , Chen De Zhi
Published: November 2012

This paper describes the successful experience of the directional control blasting of two 90m-high reinforced concrete cooling towers of Hefei Power Plant in Anhui Province. The blasting is in the complex environment. It emphatically describes the pretreatment measures, blasting cut shape and size, blasting parameters, detonator detonating network and blasting safety technology of the directional window, oriented window and load reducing slot, and the blasting vibration was tested and analyzed, and this paper provides the protection method for opening the special-shape load reducing slot and dense mesh safety net cross-multilayer coverage. Especially, the blast holes for opening the special-shape load reducing slot and the herringbone column are centralized at the bottom and top, which not only reduces the drilling workload, but also reduces the maximum detonating explosive amount of single section, and also reduces the safety protection workload. It can be a reference for similar projects.
An Identification Method of Appearances and Expansion of Fatigue Crack in the Wind Turbine Blade Based on Fractal Feature
Authors: Zhou Bo , Chen Chang Zheng , Gu Quan , Liu Huan
Published: November 2012

In this work an efficient and simplified method for crack identification in wind turbine blade has been developed based on fractal dimension. Firstly, the algorithm is studied on the calculation of the correlation dimension of acoustic emission signals, and an analysis of these equations makes it possible to identify cracks. Then it turns out that the complexity could vary with different crack expansion conditions, i.e. reduction and augmentation of the correlation dimension due to the occurrence of a crack by the fatigue experiment. Finally, the proposed detection methodology is compared to wavelet analysis. It is testified that the method exploits both the typical steady expansion of the crack and the appearance phenomenon due to the presence of crack.
Development of Automatic Stimulating Cell System Using Mechanical Vertical Force
Authors: Ay Chyung , Lien Cheng Chang , Yeh Chung Yu
Published: November 2012

This study developed an automatic monitoring system with a vertical mechanical force to stimulate cancerous cartilage sw1353 cells. The system is controlled by the human-machine interface to stretch cell-cultured substrate continuously which the cells cultured on the PDMS substrate. This system can precisely control the substrate strain, stretch frequency, stretch interval and stopping time when the substrate is stretched. The automatic monitor system can stimulate the cancerous cartilage cells which cultured on the PDMS. In addition, the electrophopresis force was used to measure the cell adhesive ability for the stretched and unstretched cells. The automatic monitoring system with a vertical mechanical force stimulator can stretch substrate which is stretched the strain capacity of substrate ranges from 0.5 to 9%.The stretching frequency ranges from 0.4 to 2.4Hz for this system. The average error of system ranges from 0.033 to 0.034mm after it has conducted 30 consecutive movements. When the cells were conducted 3% substrate strain, 0.8Hz, and 30-minute continuous cycle of tensile strength, the adhesion force of cell ranges from 5.57 to 7.93nN, significantly higher than the unstretched cell which range from 0.92 to 1.25nN.The experimental results showed that the stretching stimulation highly correlates to the cell adhesion.
On the Kinematics and Statics of Planetary Simple Gear Reducers
Authors: Hsieh Long Chang , Chen Tzu Hsia
Published: November 2012

The power system equipped in machinery contains power source (motor or engine) and gear reducer to get large output torque. The rotation speed of motor is made higher and higher to attach high power with the same volume. Hence, the reduction ratio of gear reducer is required to be higher and higher. Planetary gear trains can be used as the gear reducers with high reduction ratio. However, the planetary gear train with high reduction ratio is compound gear system. This paper proposes planetary simple gear reducers with high reduction ratio. According to train value equation, the kinematic design of planetary simple gear trains with high reduction ratio is accomplished. Some design examples are designed to illustrate the design algorithm. Also, in this paper, the static force analysis is carried out to prove the kinematic design is right. Based on the proposed algorithm, all planetary simple gear trains with high reduction ratio can be synthesized.
A Method of Structure Analysis for Complex Small HAWT Composite Blade Design
Authors: Wei Shih Fang , Lin Chung Yan
Published: November 2012

The air contain very low density of energy, as a result the complex 3D shape blade is required for maximize the energy extraction. The blades of the wind turbine will suffer the tough nature environment. The complex 3D shape blade with thick composite layers creates unique challenge for the design and structure analysis. The equivalent property of a composite layer that contains multiple plies of laminates is often used in the analysis of the thick composite structures. This study focused on a methodology to calculating the equivalent material properties on the 3D blade with thick composite layers. The research applies reverse engineering method to sample the blade material in order to get the equivalent material properties of complex composite 3D blade. By doing this, an equivalent material properties of composite blade can be used in the finite element analysis. The result can also provide a guide line for stress and fatigue design of blade.
Innovating the Educational Mode of Multi-Level Cooperation, Cultivating Personalized Mechanical Engineers
Authors: Li Bi Wen , Yuan Feng Wei , Hu Liang Bin
Published: November 2012

In our country, the training target and cultivation mode of mechanical engineering in universities seems to akin to each other. Besides that, undergraduate students have their own limitations in knowledge, cognitive performance and thinking model. Aiming at that fact, we have set up “an educational mode of multi-level cooperation to personalized cultivate mechanical engineers’ innovation quality” and implemented that effectively through a long time of research and exploration. Furthermore, we have gradually formed a comparative impeccable personalized educational mode in the aspects of training target, talents training scheme, course system, educational mode, teaching evaluation and then constructed a smooth personalized cultivation and management mechanism, personalized training level and teaching contents focusing on the whole progress of education, flexible teaching method and advanced teaching means, a high quality teaching team with composite construction, showing a unique individualized teaching style and personalized teaching quality. We have achieved obvious teaching benefits, educational benefits and social benefits on comprehensively prompting quality-oriented education, especially on the cultivation of ability of innovating, learning and practicing. All these efforts to improve the cultivation quality of innovative talents major in mechanical engineering at universities have been widely recognized by our society.
Diagnostic Strategy Optimization Based on Predatory Search Algorithm
Authors: Luo Jin , Deng Qi Bin , Meng Chen
Published: November 2012

With respect to the inherent NP-hard complexity of Optimization of testability diagnostic strategy problem, a predatory search algorithm simulating animal predatory strategies was designed. This algorithm adopted the gross test expense including state probability, isolation matrix and test expense as its objective function, defined local and global search by the restriction value of search space based on two points exchange, and realized the conversion between local and global search by adjusting the restriction value of search space. It had better ability to conduct local search and jump out of local optimal solution simultaneously, and provided a better resolution for the optimization of testability diagnostic strategy.
Constitutive Model Based on the Multiplicative Decomposition of Deformation Gradient in Arbitrary Orthogonal Coordinate System
Authors: Sun Wan Chao , Lu Shan
Published: November 2012

According to general crystallographic slip constitutive laws, the stress-strain analysis of nickel based single crystal superalloy (NBSCS) in arbitrary coordinate system were based on material coordinate system (SRCS method). Ignoring the other symmetry of NBSCS, only the symmetry of plane families {001} were considered, which bring considerable errors into the stress-strain analysis. In this paper, the variation regulation of micro-physical systematical property about this alloy in arbitrary directions was investigated. From the arrangement of atoms in different crystal planes, NBSCS has four symmetry plane families, {001}, {110}, {112} and {111}. According to these symmetry planes, three reference orthogonal coordinate systems were established. Based on these coordinate systems and the coordinate rotation method (TRCS method), the stress-strain relationship of crystallographic slip constitutive model in arbitrary coordinate system was established. Meanwhile elastic constants in arbitrary directions were obtained. Comparing the results of the tensile stress-strain curves obtained from TRCS method with that from SRCS method, it is found that by the TRCS method the elastoplastic stress-strain simulation error of the NBSCS could be effectively reduced.
Study on the ESC Steady-State Cycle Experiments of SCR System for Reducing NOx Emissions
Authors: Zeng Yu , Chen Ling Shan , Zhang Ming Jie
Published: November 2012

In this paper we mainly use the SCR system to do some ESC experiments for reducing NOx emissions. The main purpose of the experiments is to improve the ability of SCR system to reduce NOx emissions. The main research works are focused on the following aspects: First we could get the NOx emissions content for original machine and the theoretical demand content for urea by the emission experiment of original machine. Then on the condition of SCR catalyst is not installed, we could get the NOx emissions content by injecting a certain amount of urea. Based on the above experiments we could get the experimental results for NOx emissions by installing SCR catalyst and using the DCU to control urea injecting.
Self-Organization System Framework of Enterprise Information System Based on CAS
Authors: Cao Hai Wang , Xue Chao Gai
Published: November 2012

In order to avoid enterprise information system (EIS) risk, the self-organization mechanism of EIS based on complex adaptive system (CAS) is studied. Firstly, self-organization properties of EIS are analyzed, which include open system, nonlinear characteristics, far from equilibrium and fluctuations. Secondly, the complex properties and complex adaptive properties of EIS self-organization are studied. The complex properties include multi-agent, active adaptation of agents, multi-level nature, technology complexity, organizational complexity, process complexity and environment complexity. The complex adaptive properties include aggregation mechanism, identification mechanism, non-linear characteristics flow characteristics, diversity characteristics, internal model mechanism and block characteristics. Finally, architecture model of EIS self-organization is proposed as well as its macro and micro models, which provides a new perspective for EIS and helps understand the rules of EIS implementation.
Machining Feature Sequencing for Aircraft Structural Parts
Authors: Chen Shu Lin , Yu Fang Fang , Zheng Guo Lei , Du Bao Rui , Chu Hong Zhen
Published: November 2012

To improve quality and efficiency of NC machining sequencing, an approach to order the machining features of aircraft structural parts is introduced in accordance with the principle of hierarchical planning, knowledge and geometry-based reasoning method. The main contents consist of: (1) Machining cell and its geometric descriptions are established, and the method for decomposing generalized pocket (GP) into machining cells is proposed. (2) Based on the GP relationship tree, data model and algorithm for generating machining chain are presented. (3) Machining process segmenting, feature grouping and sequencing rules are formulated by communicating with related experts. (4) Priority graph and relationship matrix of features are applied to describe the machining precedence. The developed approach has been applied in Intelligent NC Programming System of Aircraft Structural Parts and is validated through a case study.
Survey of Turn-Milling and Applications in Aviation
Authors: Yuan Song Mei , Huang Yu Ze , Zhang Chong , Zhang Zhi Gang
Published: November 2012

Application of turn-milling technology in aviation is investigated in this paper. First, consideration is given to the characteristics and machining tools of turn-milling technology. Second, the paper describes, in detail, the application of turn-milling technology in the aviation industry: Include crankshaft, integrated impeller and aviation system part. And then, the actual machining experiment of aircraft landing gear part is conducted by applying turn-milling technology. The experiment shows that surface roughness of the landing gear part is improved from Ra>1um to 0.3 um Ra and the machining efficiency is enhanced by 200% compared with conventional processing method. Finally, in accordance with the machining experiments, the prominent application advantages of the turn-milling in aviation are expounded. Besides, the application prospect of the turn-milling in the aviation industry is forecasted and six proposals are put forward.
Overview Design Method of MEMS Devices System
Authors: Zhang Huan , Chen Chao , Wang Tao , Ma Shu Min , Deng Ya Nan , Zhou Hong Xi
Published: November 2012

With the development of MEMS devices, the design requirements to MEMS devices are more and more high. Computer Aided design of MEMS devices have been from the simple structure, fabrication process design to the development of the system design. The corresponding design pattern originally used to be to function and performance, which is called Bottom-Up, is developing to such a pattern named Top-Down to meet demands as the final purpose, and it is more reasonable. According to the current situation of MEMS technology, this paper presents a timely system design method of micro devices based on Top-Down, and further discuss the design process of Top-Down of micro devices.
Innovative Design of Pin Tumbler Lock Based on TRIZ
Authors: Wang Fei , Yu De Ping , Yao Jin
Published: November 2012

Pin tumbler lock is widely used due to its important role in security. However, the existing pin tumbler locks are not safe enough as they can be easily opened by many specific tools. Although many pin tumbler lock patents have been proposed to enhance the security level, these revealed designs still exhibit different deficiencies. In addition, the traditional method for lock designing is of low efficiency as it is based on inspiration and experience. Therefore, the TRIZ tool, which is the inventive problem solving method, is applied to lock designing in this paper. An innovative design of magnetic pin tumbler lock has been proposed through analyzing the traditional pin tumbler lock system, finding contradictions and solving them by using TRIZ tools such as separation principle, inventive principle, contradiction matrix and substances - field analysis. The proposed magnetic pin tumbler lock is double encoded and can effectively prevent specific tools from opening.
The Study of Infrared Heating on PET Bottles by Experiment and Adaptive Finite Volume Method
Authors: Hsieh Yi Chern , Doan Minh Hai , Pham Thi Thanh Hoi
Published: November 2012

Stretch-Blow moulding (SBM) fabricate process is a well known method to produce PET bottles. During the construction procedure, PET surface temperature distribution controlled by infrared heating is the key factor about manufacture technique for the better quality of PET. This paper focuses on how to measure and estimate temperature distribution on the surface of semi-transparent polymers so that we can make sure the proper position and intensity of the infrared lamb. We use infrared camera to detect the real temperature distributions and C++ object-oriented programming to estimate the infrared radiation (IR) results by adaptive finite volume method (Adaptive FVM). The numerical results have been compared with experimental results and the consequence is satisfied. Multiple lambs’ cases and the interior temperature distribution in PET will be discussed in future.
Structure Research on Carrying Frame in Portable Exoskeleton Make by Polyphenylene Sulfide
Authors: Liu Fang , Cheng Wen Ming , Zhou Yi
Published: November 2012

As carrying frame make by Polyphenylene Sulfide in Portable Exoskeleton to the research object, establish the 3D model of carrying frame on the basis of the configuration parameters of Human body backside, and implement the strength and stiffness analysis through the ANSYS software. The analysis is divided into three portions in accordance with working conditions, bending with no support, bending with human support and swaying with human support. Thereinto three portions have the same payload as 45kg and the same bending range attains 45 degree. Ultimately Stress value, quantity and distribution chart of the deformation have been obtained for each portion. Analysis results show that the each direction deformation Maximum and the stress Maximum of the carrying frame which bend without support present linear growth along with the increase of the bending angle in the course of the bending over. Therefore it causes the larger concentration of stress and deformation in the carrying frame and causes the additional load in the body. So the working conditions for carrying frame should be avoided which bend without support. To the rest of the two conditions, the stress and deformation of carrying frame are small enough to be meeting the use requirements.
Reliability Study on Bolt Support Systems of Coal Roadway under Group Failure Modes Based on Maximal Entropy Principle
Authors: Wang Feng , Cui Tie Jun
Published: November 2012

Currently, there are several failure modes in the blot structure of coal roadway. Existing reliability analysis method of blot support structure of coal roadway does not consider the relevance existing among these methods, thus reducing reliability of the blot structure. In order to fix this defect, we put forward the group failure mode of coal roadway bolt structure analysis method taking the relevance issue into consideration. At the same time, we analyze the probability characteristic of blot structure parameters based on the maximum entropy principle; through the normal distribution curve express the coal - rock characterization of cohesion and the friction angle. The Monte Carlo simulation method calculates reliability of the model with the matlab. The results show that the maximum entropy can effectively reflect the probability characteristic of variables in coal roadway bolt structure. Furthermore, Group failure modes allow for the relevance among existing failure modes in the same group, thus in the general, providing more scientific and accurate responses evaluating the overall reliability of the system. Under the group failure modes, the results of reliability are larger than those under traditional reliability analysis method with same conditions.
Durability Design of Tunnel Concrete Lining under Chloride Attack
Authors: Yang Lu Feng , Bin Hong , Bo Yu
Published: November 2012

Chloride induced corrosion of reinforcing steel is one of major causes of deterioration of tunnel concrete lining under chloride attack. In this paper, a finite element model for chloride ions transport in tunnel concrete lining was proposed based on the Fick’s second law of diffusion. The governing partial differential equation was solved numerically in space as a boundary-value problem and in time as an initial-value problem by means of the finite element formulations. The maximum allowable value of chloride diffusion coefficient of tunnel concrete lining with service life of 100a was achieved and some constructive suggestions for durability design of tunnel concrete lining under chloride attack were also proposed.
On Analysis of Ancient Town Settlement along Sichuan Salt Road - Taking the Landscape Optimization and Updated Design of Xianshi Ancient Town, Zigong, Sichuan as an Example
Authors: Li Ping Yi , Chen Ying Cong
Published: November 2012

The landscape optimization and updated design of Xianshi Ancient Town, Zigong, Sichuan along the Sichuan Salt Road are elaborated in the presented work. The development of the settlement landscape, the objective of the updated design, the creative plan of the new landscape, the new landscape nodes and optimization for the old forms are mainly analyzed so as to realize the heart return of the town natives by reviving the place spirit, maintaining the beautiful landscape and developing the tourism of ancient salt town.
Model Test Based on Mechanical Characteristics of Slope Anchor and Water Influence
Authors: Lin Cong , Lei Xue Wen , Meng Qing Shan , Zhou Rong Fang
Published: November 2012

According to basalt areas of the soil slope weathering in Guizhou, design the slope anchor model test in room. Respectively compare the single anchor strain distribution curve, before and after seepage, with different loading time, and magnitude of different strain distribution curve of the same column in the slope, sliding surface and anchor point at the end of a period comparison analysis research. Test shows that, curve distribution along the length of the anchor rod anchor strain is higher in the middle, lower at the ends; anchor deformation mainly on the top of the first row; the slope of feet and peak strain is higher than other parts, and more likely to damage; the early strain will be a negative value, and the bolts are composite components mainly affording hydraulic tensile stress.
The Durability Failure of Pre-Damaged Concrete Induced by Mechanical Load
Authors: Zhu Fang Zhi , Jiang Fu Xiang , Shang Jun , Bi Zhong Hua
Published: November 2012

Chloride ion penetration and freezing and thawing damage are the two main factors that affect the durability of concrete structures. Through the chloride ion penetration test and freezing and thawing test of concrete specimens after tensile and compressive loading, the influence of load-induced damage on the long-term durability of concrete was studied. The results showed that the apparent chloride diffusion coefficient of concrete increased by 6.4% and 34%, and the surface chloride concentration increased 10% and 40%, respectively, both of which showed the "negative effect" when the uniaxial tensile load level reached the 65% and 75% of the ultimate capacity. However, with the increasing uniaxial compressive load level, the impact on the frost resistance of concrete experienced a transformation from the "positive effect" to the "negative effect".
Remote Video Surveillance Applications in Landslide Monitoring
Authors: Yin Jie , Wang Hai Feng , Wang Shi Mei , Xu Fen
Published: November 2012

This article describes the successful application of video surveillance technology in various fields of security, government, education, expounds some commonly used landslide monitoring methods and characteristics of remote video monitoring system, demonstrates that it’s essential to apply the remote video surveillance to landslide monitoring. That remote video surveillance technology and professional platform software are combined establish a set of landslide video surveillance system. Through the real-time pictures, we can make reasonable explanation for the phenomenon of abnormal fluctuations, thus the damage due to unexpected geological landslide can be prevented and timely resolved.
Rheological Test and Research of Deep Clay
Authors: Zhou Xin , Xiao Ming Gui , Sun Gang Chen , Cao Jie
Published: November 2012

This Thesis uses the deep clay in the land subsidence area in Xi’an city as the research object, carries out the indoor high-pressure rheological test to the deep clay, discovers the nonlinear model consistent to the rheological property of the deep clay, and conduct a preliminary discussion to model. This thesis has an important preference value and significant meaning to the research of the deformation mechanism of aquitard in this subsidence area Introduction.
The Design of Densely Measured Points Long-Term Monitoring System Based on Wireless Sensor Network
Authors: Cheng Xiang , Liu Zhan Hui , Gao Wei Cheng
Published: November 2012

The wireless sensor network is a highly active area of research. Much progress has been made in wireless sensor network research for structural monitoring, but the research of the long-term monitoring system based on wireless sensor network in civil engineering structures is still at the beginning stage. The paper proposed to use wireless sensor network to realize intensive measurement long-term monitoring, in order to improve the effect of structural health monitoring. It introduced the characteristics and deficiencies of the wireless technology application in the structure health monitoring system, and proposed the system design principle of the densely measured points long-term monitoring system based on wireless sensor network. We has carried on the detailed argumentation and design from system architecture, the terminal node, monitoring method three aspects, and put forward a set of solutions.
Structural Identification of an Old Bridge by Multiple Reference Impact Test Method
Authors: Liao Yu Juan , Zhou Yun , Qin Peng
Published: November 2012

Experimental data was collected for structural identification (St-Id) of an old bridge: (1) static displacement and strain measurements taken under proof-load level, and; (2) multi-reference impact test (MRIT) data from one of the spans of a three span, cast-in-place reinforced concrete (RC) T-beam Bridge. MRIT was used to generate the modal data for computation of modal flexibility and displacement profiles. The St-Id procedure used during this application was designed to mitigate epistemic uncertainty in the data interpretation process. Successful results from MRIT demonstrated the reliability of applications for bridge condition assessment based on impact testing.
Study on Infrared Thermography Mosaic Algorithm Based on the Feature Point Detection and Registration
Authors: Jiang Ji Tong , Song Chao , An Jun
Published: November 2012

When detecting the large objects by infrared thermal method, it is difficult to get a whole panoramic picture. So it needs to stitch some infrared thermography. Image mosaic includes 4 steps, feature detection, feature registration, image transformation and image fusion. This paper studies about an infrared thermograph mosaic algorithm based on the feature point detection and registration, and realizes it in MATLAB.
Analysis on Bolt Supporting Mechanism for Roadways Driving along next Goaf Based on Triaxial Compression Test
Authors: Zhong Sheng , Yang Yong Jie , Wang Min
Published: November 2012

Conventional triaxial compression tests of coal specimens are carried out by MTS815 servo-controlled rock mechanical test system, and the strength and deformation characteristics of coal under different confining pressure are analyzed. On that basis, bolt supporting mechanism of surrounding rocks of roadways driving along next goaf is studied.