bluuebunny/crossref_metadata_2025 huggingface dataset:
Study on Influencing Factors of Coal Fines Produced by CBM Wells in Hancheng Block, Shaanxi Province, China
Authors: Zhu Xue Shen , Cao Dai Yong , Wei Ying Chun , Yuan Yuan , Yao Zheng , Zhou Ji , Zhang Xiao Yu
Published: March 2013

To ensure the continuous and stable exhaust process of coalbed methane wells, prevent coal fines from lowering the guidance ability of seepage channel, and solve the problem of stuck pump and submerged pump caused by gathering of coal fines, taking Hancheng block as the experimental area, this paper analyses on the source of the coal fines, and divides it into two categories of original coal fines and secondary coal fines. Based on the characteristics of coal petrography, coal structure, coal seam and engineering factors, we make analysis of their factor on the output of coal fines, and we conclude that the characteristics of coal petrography are the foundation, and the engineering is the precipitating factor, but the development of deformed coal is the primary factor. The study on the division of types of coal fines and output factors can provide a guidance for reasonable coal-fines-control measures.
Evaluation and Plugging Relief Technology of FYR Surfactant for Oil Well
Authors: Long Zheng Jun , Fu Ya Rong
Published: March 2013

When CaCL2 or CaBr2 solution is used to kill the well during the pump check process，the productivity of the oil well becomes unstable. The developed FRY surfactant that a nonionic polyether surfactant is used as main material and compounded with various anionic and zwitterionic surfactants could solve this problem. The results show it has excellent foamy characteristic and wettability, and can eliminate the alkali and water sensitization of stratum under acidic condition. The FRY surfactant has been successfully applied to the plugging relief of oil well. The synthesis, performance evaluation and field application of the FRY surfactant are introduced in the paper.
Research on Separation Efficiency for Oil/Gas Separator of Submersible Electrical Pump
Authors: Song Xing Liang
Published: March 2013

The criteria equation was established by using dimensional analysis; through the method of field experiment measuring the flow parameters of two-phase-flow in the gas-separator in this paper, combining with the criteria equation and experiment data, the mathematical model, which can quantitatively describe the relation between separation efficiency and the gas fluid ratio by using numerical method, is established; and the relational plate is plotted between the separation efficiency and the separation time in the case of different gas fluid ratio, which can provide theoretical foundation for the optimization of the well production parameters and the geometric structure parameters of the oil/gas separator under the submersible electrical pump.
The Law of Diminishing and Forecast of Wangjiatun Gas Field Well
Authors: Li Zuo Chen
Published: March 2013

This article studies Wangjiatun field gas well production situation, analysis to find out the law of diminishing gas, determine the decline type. According to the gas well decline rule, guide to establish the corresponding production system, but also the production of gas well according to the actual situation, to Wangjiatun gas well production performance is forecasted, make Wangjiatun gas well can highly effective and reasonable, sustainable development.
The PI Decision Theory Application of Multi-Round Profile Control
Authors: Li Zuo Chen
Published: March 2013

In this paper, from a theoretical point of view, introduce systematically the PI decision index and its physical significance, discuss in relation to technology application and method in multi-round Profile control, and propose some adjustments in the grape flower oil field applications of the technology research directions.
The Research of Cement Slurry System for High Angle Holes in Fuyu Area
Authors: Fan Zhen Zhong , Zhao Wen Xiu , Liu Qing Wang , Wang Ji Gang , Zhan Ning Ning , Liu Chun Yu
Published: March 2013

In this paper, aiming at the Fuyu high angle holes cementing technical issues, in-depth study the quick-setting, high early strength and micro-expansion anti-channeling slurry system. Use this system in Fuyu region high angle holes cementing engineering, the completion of 10 high angle holes were all qualified, 8 of which were quality well, the pass rate of 100% and quality rate of 80%.Solve the difficult problem of the cementation quality and packer formation of the cement sheath, ensure the cementing Quality of Fuyu city high angle wells, which has an important guide and reference on Jilin Oilfield in the future development of the deep horizontal and cementing technology.
The Effects of Catalysts on Pyrolysis Products of Enzymolyzed Straw Lignin
Authors: Yones Tehani A.E. , Zhu Hai Bin , Fu Yin Xuan , Chen Yong Mei , Wan Ping Yu
Published: March 2013

Lignin is depolymerized to small molecule aromatic compounds, which is regarded as one of the effective ways to achieve utilization of lignin resource. In this study, Al and Cu catalysts were loaded onto enzymolyzed straw lignin by the immersion method, and the product distribution of the catalytic pyrolysis of lignin was studied by GC-MS after being extracted by solvents. Results show that both Al and Cu catalysts can promote the lignin pyrolysis reaction. Based on the comparison of the product distribution without catalyst, Al catalyst is benefit to the formation of aromatic hydrocarbons, alcohols and phenols, while Cu catalyst contribute to the formation of hydrocarbons, alcohols and ketones.
Enzymatic Treatment of Mulberry Bast to Pulping
Authors: Niu Mei Hong , Li Na , Zhang Jian , Ping Qing Wei
Published: March 2013

Bast fiber as raw material for bio-pulping has become a hot topic for its environmental-friendly and high quality fiber for paper in pulp and papermaking industry. In this paper, the reaction of the mulberry bast enzymatic pulping has been researched. It was treated with pectinase, find the best environmental factors, such as temperature and pH value, The results show that: from the changes of pectin content, pentosan content and Kappa number to determine the optimal temperature was 50°C, and pH value was 4.
Optimal Preparation Process of the Pt/TiO2 Photo-Catalytic Composite Separation Membrane
Authors: Tan Qin Liang , Wei Yong Mei , Wang Min Nan , Liu Yuan
Published: March 2013

In this study, Nano-TiO2films are incorporated with heavy metal Pt by the Sol-Gel Dip-Coating (SGDC) method to change their photo-catalytic properties. The Pt and Pt/TiO2sol is prepared first, then it was used for coating on the ITO by the Dip-Coating method; finally, through calcination under the high temperature, the desired Pt and Pt/TiO2film can be obtained. The film structure was tested by the photoelectric test, XRD and AFM. Results showed that the best preparation conditions is identified as 10ml of Tetrabutyltitanate, 20ml of Anhydrous ethanol and 3ml of Tri-ethanolamine, with a 450°C of calcination temperature lasting for 3h; 3 layers of coating is also suggested with the Pt content being 0.30mol %.
Green Regeneration of Hemp Fiber
Authors: Li Ya , Ma Da Li
Published: March 2013

Application of hemp fiber to low-carbon design can realize conceptual innovation. This article takes low-carbon clothing as development objective, and excavates and develops its huge competitive advantages on the low-carbon clothing application aspect through studying the practical applicability of hemp fiber. Starting from green regeneration of hemp fiber, the designers would play their design creativity on the basis of visual effect, tactile effect, integral feeling and other aspects, and endow the hemp fabric more design philosophy and flexile technique of expression applying the design skills and the green concept.
Study on Synthesis and Thermal Decomposition Kinetics of Mg(OH)2 Modified with SDBS by Liquid Phase Method
Authors: Si Wei , Ding Chao , Yu Jing Yuan , Jiang Da
Published: March 2013

The Thermal Decomposition Kinetics of Mg(OH)2 Modified with Sodium Dodecyl Benzene Sulfonate (SDBS) by the Liquid Phase Method Was Investigated Using Differential Thermal Analysis and Thermo Gravimetric (DTA-TG) at Different Heating Rates. the Results Show that the Mg(OH)2Modified with SDBS Is Mg(OH)2with Hexagonal Phase Structure. the Average Apparent Activation Energy of the Decomposition Stages of Mg(OH)2Modified with SDBS Was Calculated Using the Doyle-Ozawa and Kissinger Methods as 169.13 Kj•mol-1. the Reaction Order and Frequency Factor Can Be Also Determined by Kissinger Method. the Kinetics Equations of Reaction Were Deduced as Dα/dt = (5.71×1012/β) e-20340/T(1-α)1.52.
Materials Research and Analysis of Sulfur Dioxide Absorption System
Authors: Qu Cheng Tun , Yang Xue , Yang Bo , Tian Jing , Wang Xin , Su Hong Guang
Published: March 2013

When Puguang gas field in non-normal production of hydrogen sulfide emissions from the combustion generates sulfur dioxide, in order to prevent its impact on the environment, the need for its emergency absorption. Used static weight-loss method study of A3 steel, 304 stainless steel, aluminum, H62 copper in 10% of (NH4)2SO3 solution, 10% of NH4HSO3 solution, and the mixed solution of 10% (NH4)2SO3 and NH4HSO3 respectively, optimized absorption system of material, and using the electrochemical impedance spectroscopy and anodic polarization curve analysis of several kinds of material in the absorption product solution of the corrosion condition. The results showed that 304 stainless steel corrosion resistance of the best, in 10% of (NH4)2SO3 solution, 10% of NH4HSO3 solution, and the mixed solution of 10% (NH4)2SO3 and NH4HSO3 respectively.
Multi-Sources Local Diffusion Model for Dioxins Based on Gauss Method (DM-II)
Authors: Fu Tian Bao , Zhang Bai Hong , Guan Cai Hong , Huang Shun Xiang
Published: March 2013

Aiming at effects evaluation of Persistent Organic Pollutants (POPs) for environment and human health, Multi-sources Local Diffusion Model for Dioxins Based on Gauss Method (DM-Ⅱ) is developed, in which the terrains and mixed layer thickness considered. The meteorological observations data during spring in 2006 at the Jinhua region in Zhejiang province were analyzed, and various probabilities obtained in different wind, different wind speed and different stability respectively. Based on this analysis results, using DM-Ⅱ, diffusion of several key sources of dioxin emissions at the Jinhua region is simulated, and the distribution of dioxin POPs is simulated during spring in 2006 in the region. The average concentration of dioxin POPs is about 0.1~1pg/m3 in near areas of emission sources.
Effects of Sulfur Dioxide Inhalation on Bronchoalveolar Lavage Fluid and Membrane Fluidity of Alveolar Macrophage in Rats
Authors: Du Qing Ping , Huang Bin Yan , Sa Ru La , Li Yan Xu , Meng Zi Qiang
Published: March 2013

Sulfur dioxide (SO2) is a ubiquitous air pollutant which causes kinds of damage to human and other organisms. However, the effects and mechanisms on the plasma membrane when cells and tissues were exposed to SO2were still unknown. The results herein showed a gradual reduction in body weight and dry lung weight for rats exposed to SO2. The wet lung weights were increased. The changes indicated SO2 inhalation caused pulmonary tissue permeability edema.Subscript textThe pulmonary permeability was increaseSubscript textSubscript textSubscript textd by the determination of protein contents in BALs and pulmonary permeability index (PPI). The intracellular proteins were penetrated into extracellular matrix. The total leukocytes in BALs of rats in each group exposed to SO2were significantly increased, and the granulocytes were also increased significantly. However, the lymphocytes in BALs of rats exposed SO2were to some extent different to the control groups. The activities of acid phosphatase (ACP), alkaline phosphatase (AKP) and lactic dehydrogenase (LDH) in BALs were increased to some extent. The results showed that the functions of plasma membrane were damaged with the damage of membrane structure, parts of the membrane bound enzymes and intracellular enzymes were released into BALs. The membrane fluidity in AM cells were significantly decreased by the determination of steady-state fluorescent polarization degree (P) and fluorescence microviscosity (η) of the AM.
Adsorption of Metal Ions and Organic Ions onto Human Scalp Hair
Authors: Ruan Xiu Xiu , Huang Song , Ji Yu Xia , Chen Hua
Published: March 2013

Cystine, frequently positive charged, formulated as a kind of hydrolysate surrounds the surface of hair. It baffles the particles with the same charge from being adsorbed by hair. On the contrary, it boosts those with the different charge. As a result, negatively charged ion, in the same condition, can be adsorbed more than those positively charged and much quicker to achieve the adsorption equilibrium. In the single solution, adsorption capacity is also relevant to the size of the particles. Namely, for metal ions, the larger the particles, the less they can be adsorbed. This is caused by the steric effect. While for organic anions, the larger the matter, the larger they can be adsorbed, which may be caused by van der Waals force.
Researches on the Forewarning Indicator System of Groundwater Environmental Health
Authors: Li Sheng , Cao Jian Feng , Liang Shi Chuan
Published: March 2013

The forewarning concept is proposed based on the meaning of groundwater environmental health. PSR model is introduced to build the forewarning indicator system for groundwater environmental health and totally 44 indicators are selected. The calculation methods and characteristic significance of each indicator selected to build the indicator system is explained.
Effects of Phthalic Acid Esters on the Ecological Environment and Human Health
Authors: Zeng Lu Sheng , Zhou Zhen Feng , Shi Yan Xi
Published: March 2013

Phthalic acid esters (PAEs) is a kind of very important organic chemical product, mainly used as plasticizer and softener for polyvinyl chloride (PVC), and other rubber and plastic materials in industry. However, PAEs also is a common organic pollutant and extensively exists in atmosphere, water, soil, biology and food. And by a variety of ways enter into human body and have potential harm to human health, or even endanger people’s life. Therefore, government should work out the relevant laws and regulations, research the new non-toxic and environmental friendly plasticizer, and take prevention and restoration measures to protect the ecological environment and people’s health.
The Ecological Water Use Efficiency Evaluation of City’s Riverway
Authors: Fang Shi Biao , Jia Ren Fu , Fang Shi Bin , Wei Jun
Published: March 2013

According to the characteristics of riverway ecological water use, we choose five major factors which affected ecological water use efficiency of urban riverway to establish indicator system for evaluation, and also determine the evaluation levels and single factor evaluation standard .Upon the basis above, we use the generalized Date Envelopment Analysis model on account of Fuzzy Comprehensive Evaluation Method to contrast the ecological water use efficiencies of ChangZhou city’s riverway from 2000 to 2010. Looking forward to supply urban ecological use efficiency evaluation with new thinking .
Ecosystem Services Valuation Based on Land Use Change in a Typical Waterfront Town, Poyang Lake Basin, China
Authors: Zhao Xiao Fan , Tong Peng Fei
Published: March 2013

Ecosystem service values based on land use pattern were estimated in Xinjian County, a typical waterfront town in Poyang Lake basin, China. Two remote sensing images (1996, 2004) were applied to obtain land use change information, and the most recently published value equivalent were used to valuate ecosystem services. The total value of ecosystem services in Xinjian County was 4588.2 million Yuan in 1996 and 4587.8 million Yuan in 2004, with a decrease of 340.8 thousand Yuan mainly due to the declining areas of cropland, wetland and water body. We concluded that future local land use plan should give priority to the conservation of these ecosystems, in order to promote and maintain the balance of local ecosystem.
Environmental Efficiency Study for Jiaxing City
Authors: Liu Wen Li , He Cheng Long
Published: March 2013

The calculation methods of the city emergy yield ratio (EYR), environmental load rate (ELR) and city environmental efficiency index (CEI) are defined based on the emergy analysis of city social- economic- environment complex systems. The change trends of environmental efficiency indexes are studied which is from 2003 to 2009 year of Jiaxing city. The results show that the EYR takes on a slow growth trend, from 1.17 to 1.23. The ELR takes on a growth trend also, from 5.14 to 6.99. But, the EYR average annual growth rate is only 0.66 percent which is much lower than the inflation of ELR, whose rate is 5.13 percent. In general, the CEI has a downward trend, from 0.23 to 0.18. Industrial restructuring in Jiaxing has achieved a considerable success. The study results show that, however, the environment has a high pressure still from the social economic development. The task of industrial restructuring has a long road to walk.
Comprehensive Index Analysis on Water Quality in Lingjian Creek
Authors: Long Fei , Liu Kang Huai , Wang Li Wen , Yin Yi Ming , Yan Bo
Published: March 2013

Lingjian creek is an important branch of the Li-river.It has been badly polluted because of lacking of controlling the waste water emissions in recent years.This paper provides some countermeasure and advice about how to control the waste water emissions strictly through monitoring each section of Lingjian creek, analyzing the comprehensive pollution condition, the pollution characteristics and pollution regularity. The results show that:TN and TP are the most serious problems. The average value of TP is 4.5mg/L which is as much as five-times higher and TN is even as much as seventy-times higher. The comprehensive pollution index from high to low is: TN, TP, COD and TOC. Nitrogen and phosphorus sources are the main pollution sources.The author hopes to provide some suggestions not only for protecting Lingjian creek and Lijiang river, but also for keeping the sustainable development of Guiling tourism.
Synthetic Assessment Method with Cloud Theory for Marine Water Quality
Authors: Li Ming Chang , Zhang Guang Yu , Si Qi , Liang Shu Xiu , Sun Zhao Chen
Published: March 2013

A synthetic assessment method and systematic procedure are developed in this paper based on cloud theory. The calibration results work well in one building site of Bohai Bay. This shows the presented method has advantages of concision and easy-operation, and the randomness and ambiguity can reacted in the assessment procedure, so the assessment results are practical significance.
The Design of a Monitoring System Based on GPRS for Rice Production Environment
Authors: Mi Xue Ming , Zhang Tian Shun , Lu Shao Kun , Su You Bo
Published: March 2013

This paper introduced a monitoring system of rice production, which can monitor the ambient temperature, humidity, the temperature of rice water and soil and Terrace surface runoff water in the process of rice production. All the testing data are firstly aggregated to a cluster node, and then transmitted to network datacenter through the GSM, so that users can access the datacenter server for the data related to the production environment. The monitoring system has been installed in the experimental field at the village of Qingkou, Yuanyang County, Yunnan Province. It has been running normally for one year. The system can monitor the real-time meteorological factors affecting the growth of rice, which provides the supporting data for exerting comprehensive control of insect pests and studying in-depth the problems of water terraces and nutrient balance before increasing the yield of rice and improving the quality of rice.
Study on Method to Achieve Position of Amphibious Vehicle Navigating on Water
Authors: Wang Tao , Yao Xin Min , Yang Xiu Yue
Published: March 2013

To simulate flow field around amphibious vehicle, vehicle position of amphibious vehicle is an important boundary condition that used to be determined by prior experimental data. In order to compute vehicle position and flow field simultaneously, the simulation is solved based on Arbitrary Lagrangian-Eulerian approach that can solve interaction between vehicle and water. Rigid body spatial motion equations and flow governing equations are integrated to establish a mathematical model of amphibious vehicles navigating on water. Differential equations are solved by finite volume method. Dynamic deformable grid is used to construct moving boundary. Weighted recursive estimation method is proposed to eliminate numerical oscillation in computation. Straightly navigating motion is simulated. Results of vehicle position and resistance indicate that simulations can achieve enough hydrodynamic characteristics.
A Novel Stable Algorithm of Getting User’s Account Based on Telnet Protocol
Authors: Wei Li , Deng Da Zhi
Published: March 2013

In recent years,china input in the construction of the network management is constantly increasing;information technology has improved continuously,but,making a variety of network security incidents occur frequently,due to the vulnerability of the computer network system inherent,a direct impact on national security and social and political stability. Because of the popularity of computers and large-scale development of the Internet, network security has been increasing as the theme. Reasonable safeguards against violations of resources; regular Internet user behavior and so on has been the public's expectations of future Internet. This paper described a stable method of getting telnet user’s account in development of network management based on telnet protocol.
The Research of Hard Disk Encryption System Based on Advanced Encryption Standard Algorithm
Authors: Bin Wang , Jiang Chong Ran , Li Jing
Published: March 2013

The paper designs a hard disk encryption system with pure software realization, the system uses the Windows driver development technology, uses the AES（Advanced Encryption Standard） algorithm as the hard disk encryption algorithm.It could protect sensitive information effectively without additional hardware devices and implements encryption and decryption for the whole hard disk.
The Study on Process Development System
Authors: Liu Xue Peng , Zhao Dong Mei
Published: March 2013

The process -oriented product process model is established. The map of process model and product development is built. On the basis of product development process model, a model DMPA (Product development process model based on the process or action) is proposed. The algorithms of process deletion and recursion are put forward to implement the application system.
Colorimetric Assay of H2O2 Using Fe3O4 Nanoparticles as Nanocatalyst
Authors: Jiang Zhi Liang , Liang Xiao Jing , Lu Xun Jiao , Huang Qiu Ye
Published: March 2013

Fe3O4 nanoparticles were prepared, and catalyzed the reaction of H2O2-methyl orange. In pH 1.42 HCl-NaAc buffer solution, methyl orange has two absorption peaks at 331nm and 506 nm. When Fe3O4 nanoparticles was added, it can catalyzed H2O2 oxidizing methyl orange to result in the absorption value decreased at 506 nm. The decreased absorption value is linear with the concentration of H2O2 in the range of 3.5-33 μmol/L. Based on this, a new colorimetric assay has been proposed for the determination of H2O2 in the water sample, with satisfactory results.
Study on Thermal Oxidative Aging of Nitrile Rubber
Authors: Li Xiao Gang , Zhang Yu Long , Yang Ming Yuan
Published: March 2013

This paper studies the changing regularity of hardness and tensile strength, through accelerated aging test of NBR in hot air. The tensile fracture appearance of test samples aging for different time is observed. The results indicate that NBR’s hardness increases firstly and then decreases and finally increases again, tensile strength presents escalating trend and the change of tensile fracture corresponds with polymer fracture mechanism of elastic material.
Reliability Analysis on the Chassis Hydraulic System in Hydraulic Loader
Authors: Li Xiao Gang , Wang Wei Han , Zhang Wei Fang , Wang Yu Fan
Published: March 2013

Hydraulic loader is a major equipment for the airport engineering, the high efficient excavation is closely related to the reliability of equipment. Due to severe environment in the construction site, the chassis hydraulic system has high failure rate in the loader. Based on the criticality matrix analysis, some fatal failure modes were traced, including the leakage of motor, the pollution of hydraulic oil, the suction air of pump. Through the reliability prediction analysis, the estimated reliability of the chassis hydraulic system is 0.27, and mean time between failures of the system is 183h, in addition, critical components in the system are also determined. The above result could be used as reference for the optimization designing.
Study on Modeling and Kinematics Analysis of an Assistant Robot
Authors: Kivugo Ramadhani O. , Wang Zhong Min
Published: March 2013

Firstly, model of an assistant robot is built by UG software based on analysis to human exoskeleton system. Secondly, for establishing its kinematics model of this assistant robot, physical characteristics, practical geometric parameters and restriction relations are considered, and then this model is exported to ADAMS environment. Thirdly, simulation studies to the assistant robot system are carried out by ADAMS, and its kinematics performances are analyzed. Simulation experiments verify the validity and feasibility of the modeling and kinematics analysis method.
Simulation Research on Reliability Enhancement Testing of the Spring
Authors: Yang Yan Feng , Zheng Jian , Di Chang Chun , Yang Yu Liang
Published: March 2013

In order to improve the system reliability testing efficiency, Reliability Enhancement Testing was applied to it. Taking the spring of the mechanical system as research object, the enhancement testing technology, increasing the initial compression, was confirmed through failure mechanism analysis. Based on the virtual prototype of the system established in simulation software ADAMS, the dynamics of the spring under different stress levels were analyzed. The load spectrums are obtained under both normal and enhancement testing conditions. The static stress distribution is gotten after finite element analysis with quasi-static method in Patran. According to the load spectrums and stress distribution, the life of the spring is gained through calculation in Fatigue. Then the enhancement testing result was evaluated. The testing shows that the enhancement testing technology is able to accelerate the failure of the spring and reduce the testing time. The enhancement testing technology is feasible, and could direct Reliability Enhancement Testing in practice.
Real Time Simulation of Insulated Gate Bipolar Transistor
Authors: Ma Xiao Jun , Yang Zong Min , Liu Chun Guang , Yan Yu Lin
Published: March 2013

The voltage spike, current spike and power loss in switching process is important factors in reliability of insulated gate bipolar transistor (IGBT). The real time simulation of IGBT is studied in this paper, taking the basic cell of IGBT power electronic circuit as an example. The function model of IGBT for real time simulation is built by piecewise interpolation method, in which the parameters are get from the datasheet. The real time simulation of IGBT is realized in field programmable gate array (FPGA), and the results can reflect the key performances of switching process.
The Study on Electro-Hydraulic Servo System Nonlinear Control and Robustness
Authors: Liu Xue Peng , Zhao Dong Mei
Published: March 2013

The nonlinear model of electro-hydraulic servo system is discussed, which makes the system's nonlinear model precise linearization. The influence of the spring stiffness, moment of inertia and viscous coefficient, servo valve preliminary open volume on robustness is discussed.
Dynamic Optimization of Hydrostatic Supported Worktable System with Circular Oil Recess
Authors: Ye Hong Ling , Wen Pin , Zheng Xiao Long
Published: March 2013

In this paper, optimal parameters in hydrostatic supported worktable system with circular oil recess are calculated. The optimal model is established in which the objective is to make natural frequency deviate from speeds of the rotary work axis, and the design variables are recess number, initial oil film thickness and recess radius. As the design variable vector includes both discrete and continuous components, two-phase optimization strategy is developed. Furthermore Fibonacci method is applied to deal with the problem of discrete variable, and response surface methodology is used to form an explicit expression between the objective expression and continuous variables. Then the optimal model is solved by gradient projection method and simplex method. As a result, numerical calculation of dynamic optimization with hydrostatic worktable system with circular recess shows that two-strategy optimization algorithm is stable and effectively.
Research on Heat Transfer Regulation of Power-Split Hybrid Electric Vehicle under Silent Watch Operation
Authors: Sun Xiao Xia , Wang Yi Chun , Wu Yu Feng , Gao Jia Yu , Zhong Feng Lei
Published: March 2013

Silent watch operation is a typical driving condition of power-split hybrid electric vehicle (PSHEV) which has advantages of both series and parallel HEVs. Because of the complicated structure and operations of PSHEV, an advanced thermal management system with effective control strategy is needed urgently. Properly-adopted heat transfer regulations under different vehicle driving conditions are the basis of TMS control strategy establishment. In this study, we begin this work from the typical vehicle operation-silent watch operation. Then, the heat transfer regulation of PSHEV under silent watch operation is researched and analyzed with the present advanced TMS. The results can provide theory and data bases for the future research of TMS control strategy for PSHEV.
Wind Tunnel Experiment and Numerical Simulation of the Pressure Distribution on a Sedan Exterior Surface
Authors: Yang Bo , Huang Li Na , Wu De Jiu , Hu Xing Jun
Published: March 2013

The wind tunnel measurement and numerical simulation of a 50% scaled sedan model surface pressure distribution were made in order to provide fundamental data for improving the Computational Fluid Dynamics (CFD) simulation accuracy of the aerodynamic noise related flow field around automobiles. The pressure measurement positions of the wind tunnel experiment were on the side window and the door. The wind tunnel test section speed was 30m/s at 0° yawing angle. As for the CFD simulation, the wind tunnel shape computational domain and four settings of the near wall computational mesh were made. Both the k-ω SST and the Realizable k-ε turbulence models were chosen. And three value ranges of the near wall computational mesh’s dimensionless wall distance (y+) were realized. Compared with the experimental data, the pressure coefficient (CP) simulation results showed good agreement with the measurement at the re-attaching region on the side window and the attaching region on the door. But the large CPprediction errors happened in the region of the front pillar vortex, the side view mirror wake. It was also shown that the predicted CPvalues were almost independent of the y+value, except the comparatively larger CPpredicted errors on the side window obtained by using the k-ω SST turbulent model when the y+value ranged from 4 to 7. Further unsteady CFD simulation and the exterior aerodynamic noise measurement need be carried out due to the unsteady features of the separated flows, including the front pillar vortex and the side view mirror wake.
Settlement Deformation Evaluation Method of High-Speed Railway Cutting under Rebound Effect
Authors: Jiang Ling Fa , Xiong Shu Dan , Lei Tong Bing , Xu Xi Chang
Published: March 2013

Based to the design scheme of the typical high-speed railway cutting, the numerical model on the high-speed railway cutting settlement deformation under rebound effect is established with suitable geometric and mechanical parameters. Some calculation cases are designed to study the settlement deformation evaluation method of high-speed railway cutting under rebound effect. Through analyzing the settlement deformation data of different conditions, the optimal curvilinear regression method is determined, the reasonable dead load observation period is discussed, and a new settlement deformation evaluation method with the assessment coefficient is established. This study will provide some reference for the design and the settlement deformation evaluation of the high-speed railway cutting under rebound effect
Sensitivity and Linearity Measuring of Micro-Gyroscope Based on Dynamic Analysis
Authors: Sun Hai Gang , Zhou Yong
Published: March 2013

The operating performance of micro-gyroscope may be easily influenced by various factors, which changes the dynamic response accordingly. Generally, the influences can’t be quantified because of the complexity, and the accurate sensitivity and linearity measuring of micro-gyroscope meets enormous difficulties. In order to accomplish corresponding measuring and analysis accurately and efficiently, input excitation waves are designed based on mathematical analysis of the measuring principles and vibration response, and each measuring of sensitivity and linearity can be analyzed in a single test. In this way, the influences from manual operation and variation of measuring environment are well eliminated, and some key parameters of the dynamic response are obtained, such as sensitive voltage, response function, linearity error, etc. In addition, problems about imbalance in double drive vibration, design of the minimum excitation voltage and evaluation of the measuring error are also described. Therefore, some important references are provided for subsequent design, experiment and engineering application.
The Research on the Influences of Exhaust Noise and Engine Performances by Using Cracking Sound Attenuation Coupler
Authors: Cui Jun Jie , Xu Yan Fang , Sun Jing Rui
Published: March 2013

This paper adopts Finite Volume Method, with the aid of GT-POWER platform, building the joint model of engine with cracking sound attenuation coupler. Based on the correctness of verification model, we research the cracking sound attenuation coupler’s influence on exhaust noise with engine performance. The results show that the muffler causes little power loss for engine at low and medium speed. At high speed the muffler brings power loss to engine mainly coming from muffler tail. Comparing with original muffler in the aspects of noise elimination performance and engine performance is not obvious effect and at the meantime providing a feasible technology method for realizing high efficiency and cleaning burning of methanol.
Study on Viscoelastic Plastic Damage Model for Mica-Quartzose Schist
Authors: Chen Wen Ling , Zhao Fa Suo
Published: March 2013

A linear viscoelastic plastic creep model of mica-quartzose schist is established by using the method of establishing combined-linear-component model based on triaxial creep test. The micro-structural changes of mica-quartzose schist during triaxial creep process are observed by using the scanning electron microscope test, based on that, the relation of macro-stress and macro-strain with porosity and damage variable are established through statistical damage theory and simplified mechanical model respectively, the creep damage variable is obtained by further derivation on the basis of above study. The creep damage variable is simplified according to the whole creep process curve, substitutes the simplified creep damage to the estabilished linear viscoelastic plastic creep model of mica-quartzose schist, considering the change of modulus and viscosity during creep process, a viscoelastic plastic damage model of mica-quartzose schist is established. The model parameters are got by segment fitting, the good consistency of the test curves and the fitted curves shows the right and reasonable of the creep model, it also shows that the model can well describe the nonlinear accelerated creep stage. Sensitivity analysis shows that parameter m has greater influence on the accelerated creep deformation than parameter a.
Study and Simulation of Dead-Time Compensation for the Voltage Source SVPWM Inverter
Authors: Chen Shao Chang , He Hui Ying , Li Chao , Wang Chuan Hui
Published: March 2013

The dead-time effect of the SVPWM inverter was analyzed as well as its effect on the control system performance (distortion of phase voltage and zero-current clamp phenomenon of phase current, etc).Then, basing on the analysis about the generation of the dead-time effect, the error voltage vector compensation strategy was raised. In order to verify the correctness and reasonableness of the compensation strategy, simulation system was constructed in use of Matlab/Simulink software to implement analysis and research. Simulation results show that the zero-current clamp phenomenon of phase current was basically eliminated after using the dead-time compensation. Then spectrum analysis was made for the phase current waveform, which showed that the compensation strategy weakened the fifth and seventh harmonic waveform brought by the dead for the inverter, significantly improved sinusoidal and system control performance of the phase current, and proved the theoretical correctness and experimental feasibility.
Design of Improved Disturbance Observer for Stabilized Platform Servo System
Authors: Lu Jian Shan , Wang Chang Ming , Zhang Ai Jun , Meng Xiang Fei
Published: March 2013

In order to reduce the influence of frictional interference and measurement noise on stabilized platform tracking performance, disturbance observer (DOB) is applied to platform servo system. In view of the non-ideal performance of classical disturbance observer about suppressing measurement noise, a novel improved DOB which uses an additional control signal to compensate system outputs is proposed based on the structure of classical DOB, and robust stability of the improved DOB when existing model perturbation is analyzed in detail. Simulation results show that the improved DOB can suppress external disturbances and model perturbation well, and the suppression performance of measurement noise is improved, too.
Study on the Influence of Gravity Factor on Parametric Resonance of Pipe Conveying Fluid
Authors: Chen Bing , Deng Ming Le , Yin Zhong Jun
Published: March 2013

The averaging method has been applied to calculate the critical conditions of parametric resonance instability of the first order mode shape of clamped-clamped and pinned-pinned pipes conveying fluid. The influence of gravity factor on parametric resonance of pipe conveying fluid, with different supporting forms and different flow velocity, has been studied based on the comparison results of gravity factor being considered and neglected. It is concluded that gravity factor has a greater influence on parametric resonance region of pinned-pinned pipe than the one of clamped-clamped pipe, and, at a higher flow velocity, gravity factor is more influential to both pinned-pinned pipe and clamped- clamped one.
WSN System Based on Weight Adjust for Machinery Manufacturing Machine Monitoring
Authors: Sung Wen Tsai , Hsu Chia Cheng , Chen Jui Ho
Published: March 2013

This paper improve the original particle swarm optimization (PSO) algorithm in the fixed inertia weight, this study analyzed the value of inertia weight factor in (PSO) algorithm, and proposed a non-linear weights with decreasing strategy to implement the Improvement PSO (IPSO) algorithm and estimate the weighted factor in the data fusion of multi-sensors network. This FLAG Programmable System On Chip (SoC) Developing System 1605A (FLAG-the PSoC-1605A) as an experimental platform, using various types of sensors, combined with ZigBee wireless sensor networks, the TCP / IP network and the GPRS / SMS long-range wireless network will sense the measured data analysis and evaluation, to create a more effective monitoring and observing regional environment to achieve a things and things, and automated exchange of information between persons and things, processing an intelligent network. Finally, the IPSO applied the IOT system in monitoring environment is better than other existing PSO method in computing precise and convergence rate for excellent fusion result.
Approach to Steel-Bamboo Composite Structure System
Authors: Yan Zhi Min , Du Yong Fei , Huang Jun Guo , Li Yu Shun
Published: March 2013

Modern bamboo structural system is a new type of green sustainable building technology, conform with our country’s requirements of developing environment-protecting and energy-saving buildings. This paper presents a new lightweight, high-strength , earthquake-resistant and energy-saving system-steel-bamboo composite structural systems , and given the various structural elements of the composite structural systems of steel-bamboo production methods . This paper also gives the production methods of steel-bamboo composite elements. Steel-bamboo-structural system can per-fectly combine steel and bamboo to bear load together, and it have excellent mechanical properties and broad application prospects.
Discrete Element Method Simulation of Residual Stresses in Grinding of Granite with Single Diamond Grain
Authors: Kang Liang , Ye Yong
Published: March 2013

The discrete element model and the model of single diamond grain grinding process of granite were constructed through numerical simulation and calibration of mechanical properties. Based on the models, the grinding processes of granite was dynamically simulated, and the effects of different rank angles, grinding speeds and cutting depths on the distribution of residual stresses as the depth of workpiece were also analyzed. The results show that the residual stress in the workpiece is relatively small after grinding when the tool rank angle lays in a small negative (-200 to 00). Otherwise, when the tool rank angle is too large or too small, there is a significant residual stress. The residual stresses in the workpiece increase with the increase of grinding speed and cutting depth. The residual stress nephogram was accomplished and the generated mechanism of residual stress was also analyzed. The results proved that the discrete element method (DEM) is an effective way to analyze the residual stress
The Effect of the Stirring with a Large Size of Stirrer on Formation of the Composite Joint Reinforced with SiC Particle
Authors: Zhou Bo Fang , Xu Hui Bin , Ding Xiao Ya , Zhang Cheng Jian , Dou Biao
Published: March 2013

The stirring assisted brazing of SiCp/A356 composites with a large size of diameter in air was investigated. A first stirring was applied in brazing of the composites at 470°C. Then, it was continuously heated up to 510°C. Then, a secondary stirring with a large size (2.4mm) diameter was introduced in process. It was found that a composite joint reinforced with SiC particles can be obtained by stirring at 510°C. The experiment result shows that micro-hardness of joint brazed by 2nd stirring is obviously higher than that of joint brazed without 2nd stirring. Moreover, micro-hardness of the upper part of joint is slightly higher than that of the bottom part.
Effect of Lanthanum Nitrate on Titanium Alloys Ceramic Membrane Formed by Micro-Arc Oxidation
Authors: Li Shi Jie , Feng Xiao , Wang Lu Ming
Published: March 2013

Titanium alloys ceramic membranes were prepared via micro-arc oxidation process in original electrolyte and in the electrolyte adding lanthanum nitrate respectively.The microscopic surface morphology,energy spectrum and phase composition were analysed.The biological activity was evaluated by soaking in simulated body fluid.The results indicate that lanthanum nitrate could improve the surface topography,make more calcium and phosphorus enter into the film and promote the generation of hydroxyapatite.
Experiment Investigation on Two Filter Medias for Air Filtration
Authors: Liu Jing Xian , Chang De Qiang , Miao Li Ting , Mao Ning , Sun Xi
Published: March 2013

As the fast development of industry, clean air quality environment are needed in more manufactory fields. Filter media is the key material for high efficiency filtration. In this paper, glass fiber filter and PTFE membrane filter are studied with filtration test. The results show that glass fiber filter has low porosity, lead to lower penetration and higher resistance than PTFE filter. Penetration of filters decrease with mass load increasing and face velocity decreasing. Resistance increase with mass loading and face velocity increasing.
Fabrication of Au Micro-Electrodes on Polyimide Films Using Transfer Printing Techniques
Authors: Komori Takayuki , Kosugi Tatsuya , Saito Hirofumi , Kuroda Keigo , Satano Masahiro , Komatsuzaki Hiroki , Ikoma Ryuta , Nishioka Yasushiro
Published: March 2013

Transfer printing of Au micro-electrode patterns onto a polyimide (PI) film was investigated, and the optimum transfer conditions were obtained. Here, the line and space patterns with widths of 25 μm and 100 μm were successfully transfered on polyimide films at a molding temperature of 150 °C for 3 min under the molding pressure of 2.5 MPa. This technique is expected to provide simplified processes to fabricate electrode patterns on microelectro mechanical systems (MEMS).
Research on Compensation Method of Coupled Error in High-Precision Micro-Machining Process
Authors: Deng Yong Jun , Jin Xin , Zhang Zhi Jing , Zhang Xiao Feng , Ye Xin , Ye Zhi Peng
Published: March 2013

In this paper, a compensation method of coupling error used in high-precision turning machine is proposed. The laser interferometer and optical lens are used for measuring coupling error of machine; the precise motion characteristic of the micro-adjusting mechanism is utilized for compensating. In the end, this method is verified by experiments, and the results show that the motion accuracy of the test bench has been effectively improved.
Single-Row Facility Layout Based on Manufacturing Costs
Authors: Suo Xiao Hong , Chi Xian
Published: March 2013

Single-row facility layout is widely used in manufacturing system. It has a very important effect on the performance of manufacturing system. The single-row facility layout, including linear, U-shape, and semi-circular layout are introduced firstly. Based on the lower selling price of customers’ demand, the components of manufacturing cost are analyzed secondly. Then the relationship between the manufacturing cost and objectives of single-row layout are described. Meanwhile, the mathematical and simulation models related to several parts of manufacturing cost of single-row layout are set up respectively. Finally, the simulation of these models for single-row layout is running in QUEST. After analyzing the simulation results, conclusions are obtained: (1) material handling cost of semi-circular layout is the lowest among the three types of single-row facility layout; (2) area utilization rate of U-shape layout is higher than others; (3) equipment and labor utilization of U-shape layout is the higher than others in the same moment. This research results will
An Intelligent Cruise Controller for High-Speed Train Operation Based on Fuzzy Neural Network Theory
Authors: Wang Long Sheng , Xu Hong Ze , Luo Heng Yu
Published: March 2013

An intelligent control strategy is proposed in this paper, which is applied to the high-speed train ATO (Automatic Train Operation) system in the cruise condition. The dynamics of a high-speed train is discussed based on a typical single-point-mass model and the force analysis in cruise state is studied. A fuzzy neural network control algorithm is incorporated into the ATO system aiming at improving the velocity and position tracking performance in the cruise operation of high-speed train. This control scheme adjusts the parameters of membership functions on-line and does not rely on the precise system parameters such as resistance coefficients which are very difficult to measure in practice. The numerical simulation verifies the effectiveness of this fuzzy neural network algorithm.