bluuebunny/crossref_metadata_2025 huggingface dataset:
Layout Improvement for Mixed-Model Production Offline Area Based on Fundamental Industrial Engineering and Simulation
Authors: Wang Hai Yan , Zhuo Yi Jun , Qin Zi Xing
Published: June 2013

In a mixed-model assembly down line area, products need to be lifted to the suitable racks one by one by two labors. Then the forklift will take the racks to other zone. For security reasons, there is a zone where labors and forklift cant work simultaneously. Also the racks need to be changed often according to the product types because of the mixed-model production. These activities are not value-added. All the above reasons lead to low efficient output. Fundamental industrial engineering methods are used to analyze the process of down line area and find the nature of the problem. Two improved plans are given based on the analysis. At last simulation for discrete events is used to verify the two plans. The simulation results show that the output efficiency of the down line area can be improved by increasing the racks counts and partitioning the racks.
The Impact of Using the Power to Change the Electrical and Mechanical Equipment Performance
Authors: Song Jing , Huang Hao Min
Published: June 2013

The impact of the facilities function is analyzed after the source of the imported equipment is converted form threephase 60HZ 400V(threephase 60HZ 220V) to threephase 50HZ 380V,A method which contains the fusion of machinery and electricity is discovered to protect the function of technology and productivity ,and to cut the cost of the converted electricity.
Application of the Wireless Data Transmission System
Authors: Cheng Li , Cheng Zhen Huan , Cheng Huan Xin , Li Peng
Published: June 2013

Because of Urumqi Petrochemical Plant needing a large amount of industrial water, in view of their water supply problem, this paper proposed to use wireless data transmission technology to install a wireless gateway on the far flow transmitter, through the equipment RS485 interface, the cumulative flowing data accessed radio station to get the data by using the MODBUS protocol. Eventually it improves the efficiency of the water supply and centralizes management.
Vibration Fatigue Test Based on Fiber Bragg Grating Sensors and HHT
Authors: Xin Si Jin , Tong Zhen
Published: June 2013

The metal fatigue is an important factor to cause an accident in machine operation, so metal fatigue test is a significant procedure in manufacturing. Fiber Bragg Grating (FBG), as an innovative sensor, has been applied to the measurement of various rotating machines. In this paper, the time-frequency analysis is used to detect the fatigue feature of a titanium alloy measured by FBG sensors. Furthermore, the Hilbert-Huang transform (HHT) is more effective to observe the fatigue limit of the titanium alloy sheet, compared to the Wavelet transform (WT).
Repair Method for Overheated Areas in the Liwan3-1 Jacket Members
Authors: Yang Feng Yan , Li Shu Min , Song Zheng Rong , Deng Tui , Yang Ming Wang
Published: June 2013

LW3-1 CEP(Central Processing Platform) jacket ranks fifth heaviest jacket in the world and the heaviest in the Asia. Some of members were overheated due to improper temperature control in the PWHT process during the fabrication of the tubular members. To evaluate the impact of overheating to the member performance, a series of evaluation experiments were performed for the overheating members and repair work was conducted to replace damaged area of members. This paper summarizes the evaluating experiments result and the repair procedures for the areas which were overheated in the PWHT(Post Weld Heat Treatment) process during the fabrication of the LW3-1 jacket. The proposed repairs meet the project requirements for both strength and fatigue requirement. This paper presents the experiences which may benefit future applications.
An Efficient Algorithm to Understand Long Counterexample
Authors: Chen Zhi Yuan , Huang Shao Bin , Ji Ming Yu , Shen Lin Shan
Published: June 2013

For given system to proceed model checking, if system model is discontent with the quality which to be detected, model detector will give counterexample, it will cause the generated counterexample too long when system state-space is very large, it is a very important problem, how to find the reason of model failure from long counterexample quickly, the article uses extractive technique of minimal unsatisfiable subformula to put forward a kind of understanding counterexample way which is extracted minimal unsatisfiable subformula quickly from Boolean formula. The algorithm can pinpoint error and find the reason of model failure. Experimental result indicated that understanding counterexample is based on minimal unsatisfiable subformula can accelerate understanding counterexample speed, improve the efficient of debugging, guide system abstract model improvement effectively.
Reconstruction of Distribution Network Based on Binary PSO and Optimal Flow Method
Authors: Liu Shuo , Liu Biao , Peng Yin Jun
Published: June 2013

This paper introduces an algorithm based on improved binary PSO and optimal flow to solve the optimal network reconfiguration problem for power loss reduction. The PSO is a relatively new and powerful intelligence evolution method for solving optimization problems. It is a population-based approach that uses exploration of positive feedback as well as greedy search. The algorithm solves reconstruction of distribution network through two stages. Firstly, the binary PSO algorithm get the optimal subspace from the global space, secondly the optimal flow algorithm obtain the local optimal network structure in the subspace, finally through the PSO algorithm iterative, from the local optimal solution to search the global optimal solution. The results of calculation example show that the proposed algorithm is correct and fast.
Bridge Monitoring Data Analysis Based on Apriori Algorithm
Authors: Ye Qing , Zhan Qiang , Liu Feng , Song Zan
Published: June 2013

With the rapid development of transportation, more and more bridges have been built, the problem of bridge health monitoring has became one of the most important thing in civil engineering field of current research. Many bridges installed monitoring sensors, a large amount of data collected during the operation, how to use the monitoring date of bridges effectively, for providing scientific data support to the operation and maintenance of the bridges, this thesis has established an Apriori model to search the rules potential, at first, thought dealing with the database in the early period, then, establishment of a given bridge state Apriori evaluation model, Digging out association rules between each attribute potential, we can effectively diagnosis bridge condition and realize the structure change of the bridge in time by using the rules potentially, then we can provide more data supporting evidence and the early warning before the hazardous happen to bridge maintenance personnel has a certain practical value.
The Operating Characteristics of Orbal Oxidation Ditch Process under Low Dissolved Oxygen
Authors: Zhang Si Mei , Liu Lu , Hu Shu Heng
Published: June 2013

Orbal oxidation ditch is widely used in urban sewage treatment system ,Oxygen consumption level is an important index to measure process operating characteristic, discuss the operation mode of Oxidation ditch under low dissolved oxygen concentration condition is the main link of Sewage plants energy saving operation. Through the adjustment of chongqing TongLiang sewage treatment plant Orbal oxidation ditch aerations equipment operation parameters, the operating power reduced 7.5 kW, the removal rate of TN increased from 19% to more than 50%,and COD, BOD5, TP, NH3 - N removal rate was not affected, the Water meet the design requirements.
Wuerxun Depression Fan Delta Depositional System Research of Nantun Formation in Wubei Sub-Depression
Authors: Zhang Jing Jun , Liu Cheng Zhi
Published: June 2013

Fan delta facies deposition are developed in the steep slope of faulted lake basin and have features ,such as the rapid accumulation, from near provenance, clastic coarse granularity and poor sorting. By means of core, logging, well logging and seismic data, based on the sedimentary characteristics of Nantun formation of Wuerxun depression, the conclusions are as followings: Faulted basin steep slope belts are developed fan delta depositional system with volcano facies in Wubei sub-depression of Wuerxun depression;The fan delta system are divided into plain,front and front fan delta etc,three subfacies, seven microfacies; In distributary channel microfacies, sand conglomerate, gravel sandstone, middle-grit are main lithology, low maturity, poor sorting to medium, vertical sequence, visible bottom gravel and erosion surface, large scale cross-bedding are developed, partial visible horizontal bedding; channel mouth bar microfacies relatively rudimentary, lithology with sorting relatively good powdermiddle sandstone, development of small cross-bedding, horizontal bedding.
A Model for the Domino Effect Analysis in Quantitative Risk Assessment
Authors: Chen Ming Liang , Geng Zhi Qiang , Zhu Qun Xiong
Published: June 2013

The domino effect is responsibility for many most destructive accidents in the chemical process industry. The catastrophic consequences are not only affecting the industrial sites, but also people and environment. However, quantitative methods which take in to account the domino effect are still missing. A model for quantitative assessment of the domino effect is presented. The probabilities of occurrence are obtained by the event trees. The frequencies of different accidents can be obtained by applying the proposed method. The results of the case study show that the domino effect should be taken into account in quantitative risk assessment (QRA).
Game Analysis of the Adverse Selection Formation Mechanism on Engineering Quality Risk Based on Information Asymmetry
Authors: Deng Jian Xun
Published: June 2013

The paper makes a deep analysis of the adverse selection formation mechanism under the condition of information asymmetry through the establishment of adverse selection game model in construction market. The paper seeks the root of the construction market risk based on the perspective of information economics. Due to asymmetric information, the adverse selection makes the low strength level engineering quality responsible units expel the high strength level engineering quality responsible units form the construction market , and greatly increases the risk of the construction market, which will make it difficult for construction engineering quality to be guaranteed, and lead to engineering project quality risk. The paper puts forward some effective countermeasures and suggestions to avoid construction market quality risk from both sides of the construction information symmetry angle.
Cutting Technique of Welding Groove for Intersecting of Braces at Small Angle during Liwan 3-1 CEP Jacket Fabrication
Authors: Yang Feng Yan , Li Shu Min , Song Zheng Rong , Deng Tui , Wang Zeng Bo , Zhang Wen Hao
Published: June 2013

This paper presents the method to perform cutting of welding groove for intersecting of pipes at small angle during Liwan 3-1 CEP jacket fabrication. The mathematical model of the intersecting pipes as well as the cutting method for transition section have been studied using the principle of geometry, which enables fabrication team to print out the full scale template drawing to guide cutting of welding groove for intersecting of braces at small angle. This method has been fully tested during LW3-1 jacket fabrication which indicated that the welding groove can meet the requirements of AWS D1.1 code and the method can be adopted for future jacket construction.
Supervision Organization Design of Government Investment Project Based on Multi-Agent Technology
Authors: Zhang Hao Bo , Zhang Shuo , Li Ze Zhong
Published: June 2013

The agent construction system (ACS) in non-profit government investment project has developed very well. Because of the supervision content involved many government departments and need multisectoral coordinated supervision, the supervision becomes very complexity and disordered. And the dramatic changing supervision environment, supervision subject and supervision object make the supervision work became more uncertainty. Based on multi-age technology (MAT) this paper proposes to construct a new supervision organization mechanism, which could coordinate the relationship between government and agent, agent and construction side and government departments better. The new supervision organization mechanism also helps supervision parties for the effective communication and resource sharing.
Function Airfoil and its Pressure Distribution and Lift Coefficient Calculation
Authors: Jiang Hai Bo , Cheng Zhong Qing , Zhao Yun Peng
Published: June 2013

To study the impact of an airfoil shape on performance, a curve expression of airfoil shape was proposed, the analytical formula for the pressure distribution of flow around the airfoil was derived, and the pressure distribution view around airfoil with azimuth as the independent variable was put forward, which can clearly express the details of the pressure distribution curve on airfoil leading edge. Used both the pressure distribution integration method and Blasius theorem, the lift coefficient calculation formulas of ideal fluid flow around the airfoil were derived respectively, and the same results were obtained. Studies have shown that the shape of an airfoil can be expressed by a function, and various types of shapes can be easily obtained by adjusting the constant value in the expression; The pressure distribution and lift coefficient can be calculated by analytical method; For function airfoil, lift coefficient formula could be derived by two methods, and could be verified with each other. The one-to-one relationship exists between the constant values in the airfoil function, airfoil shapes and airfoil performances, and the relationship expression was given in this paper.
The Time-Frequency Analysis Method Based on EMD White Noise Energy Density Distribution Characteristics of the Internal Combustion Engine Vibration
Authors: Feng Guo Yan , Cai Yan Ping , He Yan Ping
Published: June 2013

For the limitations of HHT of the internal combustion engine vibration signal analysis, and the problem of WVD cross-term suppression methods existing aggregation and cross-term component suppression conflicting, the time-frequency analysis method based on EMD white noise energy density distribution characteristics of the internal combustion engine vibration is proposed. First, the internal combustion engine vibration signal was decomposed into the independent series intrinsic mode function (IMF) with different characteristic time scales by using EMD decomposition method. Then, based on the energy density distribution characteristics of the white noise in EMD decomposition, used the distribution interval estimation curve of the IMFs energy density logarithm of white noise with the same length of the original signal as cordon for false pattern component, identified and eliminated false mode component of vibration signal IMFs component, analysised of each IMF with Wigner-Ville. Finally, the Wigner-Ville analysis results of each IMF were linear superposed in order to reconstruct the original signal time-frequency distribution. Simulation and engine vibration time-frequency analysis results show that this method has an excellent time-frequency characteristics, and can successfully extract feature information of the internal combustion engine cylinder head vibration signal.
Study on Bio-Locust Subsequent Attitude Adjustment Robot
Authors: Yin Jun Mao , Chen Dian Sheng , Zhao Kai , Zhang Ben Guang , Chen Ke Wei
Published: June 2013

Jumping locusts continually change the shape of their body and wings to right the aero-posture and keep glide steadily, presumably to exploit the profound effect of morphology on Subsequent Attitude Adjustment (SAA) performance. The attitude adjustment is a significant theme for locust jumping and considerable progress has been accomplished recently in bio-locust SAA study. Firstly, based on the morphological characteristics of the locust locomotion, the SAA model was established. In addition, it was validated qualitatively by an exercise testing and simulation. Finally, a prototype was developed and the SAA mechanism was validated qualitatively. This work proved that the mechanism of bio-locust SAA is an effective method for bio-robot air-righting.
The Calculation and Analysis of the Infrared Thermal Wave Nondestructive Testing for the Defects of the Parts in the Turnout Point Switch
Authors: Yang Ping , Jing Ge , Li Cui Ming
Published: June 2013

This paper did quantitive flaw detection research to the defective parts of turnout point switch by using infrared thermal wave nondestructive testing based of the theory of infrared nondestructive testing. By using ANSYS, I made the numeric simulation test to parts of the inside known defection point switch, and made calculation and analysis for the result of this numeric simulation test. The result demonstrated that this method can achieve the quantitive infrared thermal wave nondestructive testing to defective parts of point switch.
Research on Three-Dimensional Visualization Terrain Application Technology Based on ECT/EPX
Authors: Dong Zhi Hui , Han Duan Feng , Song Lei
Published: June 2013

Virtual reality technology, via imitating natural environment, enables to display a vivid visual environment, which has already been applied in a great deal of domains, such as entertainment, education and training. And three-dimensional terrain plays a key role on the contribution of virtual environment, which directly effluents the reality of virtual environment. This paper firstly introduces the key technologies of creating three-dimensional visualization terrain based on ECT (Environment Creation Tool) and EPX, and then creates a terrain database for ship handing simulator to providing the feasibility of this method.
Design and Research of a New Ultrasonic Atomizing Vibrator
Authors: Li Hua , Zhao Jiang Jiang , Yin Zhen , Ren Kun
Published: June 2013

Based on the theory of ultrasonic vibration, a new type of ultrasonic atomizing vibrator (UAV) with a vibrating steel sheet was proposed. By using the finite element analysis software to simulation analysis and research for the new type of vibrator, the frequency and vibration mode of atomizing steel sheet was obtained and the prototype of vibrator was fabricated. The impedance and vibration displacement of the vibrator was tested and the experiment of the new type of vibrator was carried out, which verified the feasibility of the new type of vibrator design method.
Experimental Research on the Mathematical Model of Abrasion Ratio Based on the Abrasive Belt Grinding
Authors: Xiao G.J. , Huang Y. , Cheng R.K. , Lu Y.
Published: June 2013

Abrasion ratio is an important parameter to estimate the wear resistance of abrasive belt grinding, reacting the relationship between the material removal and the abrasive belt wear, and also, its value is an important basis to instruct the process of abrasive belt grinding. The mathematical model of material removal is obtained by analyzing the basic mechanism theory of centerless cylindrical grinding in this paper, and the impact curve which react the relationship between the abrasion ration and the material removal or cutting depth is obtained by using the software of Mathematica. The abrasion ratio is testified in this paper by the experiment test of abrasive belt grinding for the titanium alloy, 45# steel and 304# stainless steel, systematic analyzing the affection of abrasion ratio on the hardness ratio and the belt speed. Experimental result shows that: belt speed is superior than hardness ratio to the abrasion ratio, and the mathematical model of material removal is testified by this experimental research. So the mathematical model of material removal could be used with theoretical basis in belt grinding process.
Experimental Modeling Using Pseudo Mode Shape Method
Authors: Yang Ta Chung , Tsai Ying An
Published: June 2013

The foundations of most large industrial machines are complicated in configuration and shape that result in difficulties of modal testing and finite element modeling. Pseudo Mode Shape Method (PMSM) needs only the measurements of frequency response functions at the joint interfaces of the substructure and the mother structure to develop the equivalent dynamic matrices (called the pseudo matrices) of mass, damping, and stiffness of the substructure, which greatly simplifies the modeling procedure of the complicated substructure. Experimental validation of PMSM was conducted by modeling the foundation of a rotor-bearing-foundation system. The foundation is regarded as the substructure and modeled by PMSM. The rotor is the mother structure and modeled by finite element method using 3D Timoshenko beam elements. The effects of rigid body modes of PMSM in this experiment are also investigated.
Switched Projective Synchronization of the Stochastic Newton-Leipnik System
Authors: Dong Duan , Ma Shao Juan , Zheng Jie
Published: June 2013

The paper is involved with switched projective synchronization of two identical chaotic systems with random parameter using adaptive control method. Based on the orthogonal polynomial expansion of the Hilbert spaces, the Newton-Leipnik system with random parameter is transformed as the equivalent deterministic system. At last, an adaptive controller can be designed by the Lyapunov stability theorem for achieving switched projective synchronization of the equivalent deterministic system with different initial values. Corresponding numerical simulations are performed to verify the effectiveness of presented schemes for synchronizing the stochastic Newton-Leipnik system.
Bifurcations of Exact Traveling Wave Solutions of Maccari's Equations
Authors: Zhou Hong Xian
Published: June 2013

For the Maccari's equations, the objective of this paper is to investigate the dynamical behavior of its traveling wave solutions by using the bifurcation method and qualitative theory of dynamical systems. All exact explicit parametric respresentations of solitary wave, kink (anti-kink) wave and periodic wave solutions are obtained under given parameter conditions, and the dynamics characters of these solutions are also analyzed.
Study of Vehicle Vibration Model Based on Lagrange Method
Authors: Yang Ming , Zhou Xin Xiang , Zhang De Chen , Wu Xiu E , Chen Xi
Published: June 2013

The vibrating behavior of multiple DOF vehicle systems is very much dependent to their natural frequencies and mode shapes. These characteristics can be determined by solving an eigenvalue and an eigenvector problem. The kinetic energy, potential energy, and dissipation function of the system was defined by quadratures and the equations of motion were derived by applying the Lagrange method. Numerical example was calculated. The results show that the method is correct and it lay a good foundation for further research on vehicle vibration.
Application of Power Spectral Density on Estimation of the Number of Source Signals
Authors: Li Ning , Chen Hai Ting , Liu Shao Peng
Published: June 2013

Blind source separation and estimation of the number of sources usually demand that the number of sensors should be greater than or equal to that of the sources, which, however, is very difficult to satisfy for the complex systems. A new estimating method based on power spectral density (PSD) is presented. When the relation between the number of sensors and that of sources is unknown, the PSD matrix is first obtained by the ratio of PSD of the observation signals, and then the number of source signals can be estimated by clustering the column vectors of PSD matrix. The effectiveness of the proposed method is verified by theoretical analysis and experiments.
The Simulation Study of the Car Curve Traveling Traction Control System
Authors: Zhao Wei , Wang Ning Ning , Duan Yan Yan , Xi Jian Guo
Published: June 2013

Article on the basis of analysis the impact of changes on the braking force in the tire vertical load and slip angle when the car turns, using the generated neural network force model of the tire, to find the optimum value of the slip ratio of the tire under different parameters. For the case of deviating from the expected running track when the car curve traveling. It puts forward the control strategy of using yaw moment technology to control vehicle stability, vehicle stability fuzzy controller is designed, cars driving in curve conditions are simulated. The results showed that the use of neural network seeks to control of identification of the tire characteristics and longitudinal forces optimal slip rate, can reduce the risk of deviations from the expected running track when cars driving in curve, improve tracking ability of the car driving in curve, it proposed the stability control method for improve driving safety has a certain significance.
Growth Inhibition of Copper Oxide Engineered Nanoparticles to Lemna minor
Authors: Lü Kun Miao , Men Shao Kun , Wang Zhen Yu
Published: June 2013

The emerging use of metal oxide engineered nanoparticles has given rise to concerns about their potential impact on the environment. Nanoparticles will inevitably enter water environment, while there is little data on aquatic plants which play an important role in aquatic ecosystems. The inhibitory effect of copper oxide engineered nanoparticles (CuO ENPs) on the growth of aquatic plant Lemna minor was evaluated. Results showed that inhibition of plant growth was significant after exposed to CuO ENPs at the concentration of 150 μg/L. The inhibitory effect of CuO ENPs on frond number was similar to dry weight and total surface area. It is clear that CuO ENPs cause a potential risk to aquatic plants and therefore ecosystems.
Synthesis and Luminescent Properties of a Novel Nanoscale Eu(III)-Carboxylate Coordination Polymer
Authors: Tao Cheng An , Lv Yan An , Meng Ling Qiang , Liu Hui Ping , Hu Zhi Hong , Zhu Hui , Wang Jian Fang
Published: June 2013

To prepare nanoscale coordination polymers (NCPs) which can exhibit intense luminescence have attract an increasing interest. In this paper, we present the synthesis of a novel example of discus-like luminescent nanoscale Eu (III)-carboxylate coordination polymers. The organic ligand is a derivative of terephthalate (Na2L) with a big side group. The Eu (III)-L NCPs was synthesized through microemulsion method, and the morphology can alter along with the changing of metal: ligand ratios. XRD results reveal that the self-assembled disk-like NCPs exhibit long-range ordered structures. The luminescent measurements showed that the resultant NCPs not only exhibits typical fluorescence of Eu (III), but also can maintain the inherent fluorescence of the ligands.
Synthesis and Fluorescence Property of Rare-Earth Terbium Active Monomer Complexes
Authors: Wang Dong Mei , Cao Wen Bo , Fan Jian
Published: June 2013

Tb-MA-Phen mononuclear rare earth complexes were prepared. The structure and properties of the complexes were characterized by elemental analysis, FT-IR and UV, TA, X-ray powder diffraction and SEM. Moreover, the rare earth ions were doped into the polymer matrix using the combinatorial method. High luminescence copolymer was synthesized by polymerizing α-methyl methyacrylate (MA) and Styrene (St) with terbium-methacrylate complex in solution with AIBN as initiator, respectively.
Toxicity of Copper Oxide Nanoparticles on the Green Algae: Chlorella pyrenoidosa
Authors: Zhang Chen Chen , Liu Xiao Yun , Wang Zhen Yu
Published: June 2013

The toxicity of CuO engineered nanoparticles (ENPs) to chlorella pyrenoidosa was investigated in this study. CuO ENPs inhibited the growth of algal cells significantly, while the Cu ion and CuO bulk particles (BPs) showed lower toxicity than ENPs. The black dots observed in cells using Transmission electron microscopic (TEM) were determined as copper compound by EDS analysis. Cu content in algal cells measured confirmed the Cu internalized.
Production and Characterization of MWCNTs Produced by Non-Stationary Current Regimes in Molten LiCl
Authors: Dimitrov Todor Aleksandar , Ademi Abdulaqim , Grozdanov Anita , Paunović Perica
Published: June 2013

This article presents production and characterizations of MWCNTs produced by non-stationary current regimes into lithium molten chloride. In order to improve the process of MWCNTs production, instead of applying a constant cathode potential, the method of reversing the potential was applied. It should be mentioned that during the process of electrolysis reduced lithium intercalate at graphite surface and generates a high mechanical stress that causes exfoliation of the graphite cathode. This phenomenon enables electrochemical synthesis of MWCNTs to be possible. The measurements were performed in temperature interval from 700 to 800°C. Several techniques were employed for characterization, i.e. electron microscopy (SEM and TEM), Raman spectroscopy, thermo gravimetric and differential thermal analysis (TGA and DTA). SEM and TEM images show that nanotubes are mostly of curved shape with length of 1÷20 μm and diameter of 20÷40 nm. Raman peaks indicate that the crystal lenity of produced nanotubes is rather low. The obtained results suggest that formed product contains of up to 80% MWCNTs, the rest being non-reacted graphite and fullerenes. DTA curves show that combustion process of the nanotubes takes place in two stages, i.e. at 450°C and 720°C. At the lower temperature combustion of MWCNTs occurs, while at higher one fullerenes and non-reacted graphite particles burn.
Wireless Thermal Convection Accelerometer on a RFID-Tag with Heater and Thermal Piles Deposited by E-Beam
Authors: Lin Jium Ming , Lin Cheng Hung
Published: June 2013

This paper proposes an innovative method to make a thermal convection accelerometer on an active RFID tag, thus the device is a wireless acceleration sensor and can save more power. The heaters and the thermal piles are deposited by E-beam focused on a target of mixing powders of metals on the RFID tag. Thus the new device is very easy to make. Besides, a hemi-cylindrical chamber and inert xenon (Xe) gas are used to replace the traditional rectangular one with carbon dioxide (CO2). The gas molecular weight of Xe is three times larger than CO2, so the xenon gas inertia is larger and can yield quicker response. Moreover, the proposed hemi-cylindrical chamber is more stream-line in nature, thus it is with less drag effect. Note the device sensitivity when using rectangular chamber and CO2 gas is better at low acceleration. However, the performance is not only begin to decrease for acceleration larger than 18G (1G=9.8 m/s2), but even less than that using Xe gas for acceleration larger than 28G. Contrarily, when using the hemi-cylindrical chamber the device is without the above effects. Comparison of device response for step-input acceleration of 32G is also made; when using rectangular chamber and Xe gas the device response time is 31μs, but it is 60μs for the case with CO2 gas. However, when using hemi-cylindrical chamber and Xe gas the device response time is 15μs, it is about 20.2% of CO2 (74μs). Thus it is better to use either Xe gas or hemi-cylindrical chamber.
Physical Characteristics Analysis of Microencapsulated Phase Change Suspension
Authors: Fang Wen Bo
Published: June 2013

Microencapsulated phase change material (MPCM) suspension is a novel material which has functions as thermal energy storage medium and heat transfer fluid. Its physical characteristic is complicated so that little work been done on the characteristics of MPCM suspension has been published. So it is helpful for selection of new heat transfer form to analyze the characteristics of MPCM suspension. This paper investigates thermal physical characteristics of the MPCM suspension which comprise thermal properties DSC analysis, viscosity analysis and the suspension property analysis. The viscosity measurement and test analysis of MPCM suspension were also carried out to verify the theoretical analyses.
Optical Performance Characteristics of Light-Emitting Diodes Designed with Dip-Shaped InGaN/GaN Quantum well Structures
Authors: Kim Seong Jun , Choi Chel Jong , Kim Hyun Soo
Published: June 2013

A dip-shaped InGaN/GaN quantum well (QW) structure was computed to design efficient light-emitting diodes (LEDs). The advanced LEDs designed with the dip-shaped QW structures exhibited higher internal quantum efficiency by 26 % and the lower temperature-driven efficiency droop as compared to the reference LEDs. This could be due to the enhanced radiative recombination rate in the QW active region, which is associated with the reduced spatial separation of electron-hole wave functions.
Research on the Application of Microencapsulated Phase Change Materials to Thermal Infrared Camouflage
Authors: Fu En Bing , Yao Yong Ping
Published: June 2013

In order to reduce the difference in radiant intensity between background and military targets, such as road or surface of building decorated with concrete, based on the law of Stephen-Boltzmann, the influence of emissivity or temperature on radiant energy was analyzed, phase change materials (PCMs) were employed in adjusting or controlling radiant energy from military targets from the point of temperature, then the low-detective probability of the target was achieved.
Electrochemical Corrosion Behavior of Ultra-Supercritical Unit Waterwall Tube Material in Simulated Solution of Oxygenated Treatment at Room Temperature
Authors: Ma Cun Ren , Lu Hai Wei , Lu Guo Hua , Su Wei , Chen Tian Sheng , Zhu Zhi Ping
Published: June 2013

The electrochemical corrosion behavior of ultra-supercritical unit waterwall tube material in simulated solution of oxygenated treatment (OT) with different concentration of Cl- and SO42- at room temperature was investigated by electrochemical impedance spectroscopy and Tafel slopes. The results showed that the polarization resistance Rp values decreased and corrosion current density (icorr) increased with increasing Cl-/ SO42- concentration in solution. Corrosion potentials (Ecorr) decreased with increasing Cl-/ SO42- concentration in solution.
Preparation and Thermal Shock Properties of Al2O3p/40Cr Functionally Graded Composites Materials
Authors: He Xiao Gang , Lu De Hong , Chen Shi Min , Xiong Yan Chun
Published: June 2013

Al2O3p/40Cr graded composite was prepared by the squeeze casting method, and the as-cast structure, hardness, thermal shock properties of the composites were preliminary tested. The results show that the microstructure is compact and the grains of the matrix is small in the composite layer. Al2O3particles well-distributed in the 40Cr matrix in continuous trend. The Macro-interface of 40Cr substrate and composites layer transits naturally and has good continuity, moreover the micro-interface of Al2O3particles and the matrix is dense without any cavities. While the macrohardness decreases with the Al2O3content reduced gradually. At the 20°C~650°C condition of the cold and heat cycle, graded composites has superior thermal shock properties than uniform composite.
Effect of Cord Construction on the Properties of Rubber Composites
Authors: Xie Zhi Min , Chai Dong Liang , Chen Si Chi , Wan Zhi Min
Published: June 2013

Cord-rubber composites are different from the general rigid-matrix composites because of the twisted nature of cords and the large, nonlinear deformation of rubber material. The study of the effect of cord construction on their mechanical properties is essential to the improvement of the performance characteristics of rubber products. However, little work was concerned with the influence of the number of strands of cord. The present work demonstrated that influence by using nonlinear finite element analyses. The calculated results show that the effective moduli of the twisted cord reinforced composites tend to be closer to that of a single strand of cord reinforced composites when increasing the number of strands with a constant cord volume fraction. For three types of reinforcing cords, the shear stresses have a symmetric distribution and an anti-symmetric distribution in the condition of in-plane shearing and axial loading, respectively. It is also found that the minimum MISS (maximum interfacial shear stress) occurs in the case of a single strand of cord in comparison with the cases of the twisted cords, and the maximum MISS is related to the loading conditions and the number of strands.
An Experimental Study on Mechanical Properties for High Performance Concrete Using Fly-Ash
Authors: Kim Jeong Eun , Park Wan Shin , Cho Seong Ho , Kim Do Gyeum , Noh Jea Myoung
Published: June 2013

Fly ash has been used in the construction of nuclear power plant faced with marine environment. The influence of supplementary fly ash on the mechanical properties of high performance concrete (HPC) has been investigated in this study. Selected test variables were fly ash replacement ratio with four levels (0 %, 10%, 20% and 30%) and curing days (28 days, 56 days and 91 days). This paper outlines an experimental study on compressive strength, splitting tensile strength, modulus of elasticity and Poissons ratio of HPC using ordinary Portland cement and fly ash.
Load Capacity Finite Element and Optional Design of Scissor Platform
Authors: Guo Ke Xi , Wu Jia Rong , Pan Cun Yun , Yin Bin
Published: June 2013

After designing a scissor platform which main function is to standunderload, according to the load that the platform may bear, a finite element model is established, the ANSYS software is used to analysis the load on the scissor arm and mobile platform whole. The result show that the mobile platform could meet the requirements of bearing load. The maximum mises stress is taken as the objective function, the structure optimization is used on the scissor arm, so stress distribution more uniform. The work done in this article made theory basis for research and making the scissor prototype.
Temperature Control Research on Spiral Case Concrete of Xiluodu Underground Power Plant during Construction
Authors: Zhang Jun , Duan Ya Hui , Wang Jia Ming
Published: June 2013

The volume of concrete surrounding the spiral case increases along with the increase of unit capacity of single-unit hydroelectric station. Once the spiral case concrete structure works with crack, its bearing capacity and safety stability will decrease seriously. Owing to the action of contraction stress induced by temperature variation, the spiral case concrete is often subject to cracking. There are a few temperature control researches on spiral case concrete during construction in the past, more severe, there are few researches on the sensitivity analysis of parameters and measures on temperature control. For this reason, based on the finite element analysis software ANSYS, the spiral case concrete of Xiluodu underground power plant is simulated. The temperature field and temperature stress field of different pouring temperature and concrete strength are analyzed and the temperature control measures with normal C30 concrete and 293.15K casting are recommended to prevent cracks accordingly. These measures, adopted by construction units are proved to be effective and also good references for similar projects.
Application of Hoop Stress Limit State and Predicted Corrosion Rate in Underground Gas Transmission Pipeline Inspection Plan
Authors: Alfon Patuan , Soedarsono Johny Wahyuadi , Priadi Dedi , Sulistijono
Published: June 2013

In the transmission pipeline system, decreasing the integrity of the pipe is generally caused by corrosion. Limit state of hoop stress can be applied to determine whether the pipe material is still safe for utilizing below its yield stress. Defining the corrosion rate allowable will be essential in formulating risk of corrosion in the pipeline system. Using an external corrosion rate model generated by soil, the prediction of corrosion rate in every year service life of material will determine the frequency of inspection by adjusting the threshold category. The predicted corrosion rate in every year is as a function of soil resistivity by a factor of coating breakdown and cathodic protection (CP) remaining life. A modified scheme, so called the Inspection-Maintenance-Repair strategy, is an effective method to increase the effectiveness of inspections. The reduction in risk of corrosion is able to extend the inspection plan for several years.
Panel Shear Strength of Steel Coupling Beam-Pseudo Strain Hardening Cementitious Composite Wall Connection
Authors: Park Wan Shin , Kim Jeong Eun , Kim Sun Woong , Yun Song Hee , Eom Nam Young , Yun Hyun Do
Published: June 2013

Hybrid coupled wall systems, where steel coupling beams couple two or more pseudo strain hardening cementitious composite (PSH2C) shear wall can be used in medium and high-rise construction subjected to earthquake. This paper addresses the panel shear strength of steel coupling beams - PSH2C shear wall connection. Test variables included the connection detail in hybrid coupled shear wall system. The results show that Specimens PSH2C-PSFF and PSH2C-PSFFT exhibits greater panel shears strength than Specimen PSH2C-PSF.
Numerical Simulation of Temperature Field of Linear Friction Welding of Titanium Alloy
Authors: Liu Z.M. , Wang J. , Pan J.L.
Published: June 2013

In this paper, A 3D finite-elements model of titanium alloy TC4 of linear friction welding is developed based on the solution of several key techniques, such as contact boundary condition treating, material properties definition, meshing technology, etc. The temperature field and the temperature gradient of workpiece are showed in results. The temperature at the interface was quickly increased to near 1000°C at 1s, and then reached a quasi-steady and the stable temperature of interface maintained about 1100°C until welding finished.
Simulation and Analysis on the Blind Hole Method Using the Finite Element Method
Authors: Yin Chun Ho , Hsu Chao Ming , Su Ping Shen , Kuang Jao Hwa
Published: June 2013

This study investigates the effectiveness of the hole-drilling strain gage method on residual stress estimation. The thermal elastic-plastic model of the commercial Marc finite element method package is used to simulate and build up the hole-drilling process and residual stress distribution. Two Inconel 690 alloy plate welded with GTAW filler I-52 solder are first simulated using the Marc software. The traditional hole-drilling process is then simulated. The simulated residual strain variation data is incorporated into the hole-drilling strain-gage method to derive the possible residual stress components. The effects of drilling depth and drill size on the accuracy of residual stress estimates are also discussed. A comparison of stress components estimated from the traditional hole-drilling strain gage method and simulated from the Marc software is presented. The modified dimensionless parameters are provided by applying the optimum technique. The numerical results indicate that the proposed dimensionless parameters can significantly improve the accuracy of estimated residual stress components.
Optical Probe in Gadolinium Doped GaN by Metalorganic Chemical Vapor Deposition
Authors: Shu Xiang Ping , Melton Andrew , Qiu Zhi Ren , Ferguson Lan T. , Feng Zhe Chuan
Published: June 2013

Gd doping related excitons are observed in four samples with different gadolinium (Gd) adoption ratios, grown by metalorganic Chemical Vapor Deposition (MOCVD). The intensity and quenching phenomena with temperature in Gd related excitons are varied from the conduction type of samples. By temperature-dependent photoluminescence measurements the vanish effects in Gd-doping induced excitons show a significant difference from intrinsic and n-type samples to p-type samples. In the former two samples the Gd excitons disappeared beyond 200K, while in p-type samples it is still exist even in 533K.
State Monitoring of Gear Tooth Subject to Varying Work Conditions
Authors: Feng Huan Zhi , Liang Wei , Zhang Lai Bin , Lu Wen Qing
Published: June 2013

The gear box diagnosis work has received considerable attention in recent years. But diagnosis work on gear box subject to varying work condition hasnt got much attention. A diagnosis and state monitor method based on vibration signal is proposed in this paper. The signal is de-nosied by SVD (singular value decomposition). Then specific frequency band is extracted by wavelet transform. Normal state and failure state is seperated by dimensionless time-indexes. Finally, health index of gear tooth used to monitor gear state is calculated by regularization. Simulate signal and experiment signal are presented to illustrate the implementation of the method. The result shows that, wavelet transform can extract the specific frequency band; pulse index and margin index can diagnosis tooth failure under varying work conditions. Gear tooth health index can be used to monitor gear tooth state.
Analysis on BMWS Automatic Transmission Problems
Authors: Chen Chao
Published: June 2013

The article analyses the principles AT work, and a detailed analysis of BMW's automatic transmission failures, and maintenance process. Maintenance of other automatic transmission provides a certain degree of significance. It is made up of components such as pump, turbine and stator, which directly enter the engine power and torque, while a clutch role.
Study on the Corrosion Mechanism and Repair Welding Technology of Ship's Seawater Filter
Authors: Yang Qing Wen , Li Jin Fang
Published: June 2013

Intergranular corrosion is a severe damage form of austenitic stainless steel weld joint. Through cognizing the intergranular corrosion mechanism and affecting factors, the related welding technological measures such as small current, fast welding speed, narrow-gap welding, multi-channel welding, and fast cooling are taken in welding and also a good result has been achieved after practical application.
Reinforcement Technology of Cement Agitation Pile in the Highway Soft Foundation Treatment
Authors: Chen Kai
Published: June 2013

There is the soft soil distribution mostly in the regions along the river or the sea in our country, so the soft foundation treatment shold be well done in building highways. With respect to the soft foundation treatment methods, the scholars, engineers and technicians home and abroad have put forward a dozen or more methods, such as replacement method, reinforcement method, top pressing method, sandstone pile method and deep mixing method etc.. This article discusses the reinforcement mechanism, construction technology and some proceedings requiring attention in the construction and detection of the cement agitation pile.
Analysis of the Process Reliability of Machinery Manufacturing
Authors: Zhou Yu Hua
Published: June 2013

The study design, manufacturing and management make the reliability of the product. The product reliability indicators have clear requirements in the mechanical product design, the manufacturing process of mechanical products through the scientific integration process elements of materials processing becomes a practical product, but also the reliability of mechanical product design stage to achieve the process. Reliability of mechanical products not only has important implications for the design of the product, the manufacturing process to achieve product design reliability only considering the impact of various factors on the reliability of mechanical products, mechanical products, and take measures to control, in order to ensure the reliability of mechanical products.
Restoration Method of Printing Image Based on Constrained Noise Energy
Authors: Xin Zheng
Published: June 2013

The method of constrained least squares based on noise energy constraine has been stated, which was applied to process images motion blur of original manuscript on images processing of electronic publishing in pre-press. From the technique of constrained least squares and limited energy of additive noise, restoration effect of printing image is improved greatly by adopting regularization idea to overcome ill-posed problem, estimate regular parameter of self-adaption and use space iterative algorithm. The experimental results show that the method can well reproduce the important information of the original image, and the SNR of the reproduced image at peak and the subjective vision effect are significantly improved. It is feasible and effective.