bluuebunny/crossref_metadata_2025 huggingface dataset:
Numerical Simulation for Optical Crystal Growth by TSSG Method
Authors: Hu Zhen Shi , Zhu Zhi Wei , Yang Rui Peng , Wu Lai Jun , Mao Hui Min , Du Lin Ze , Li Rui
Published: December 2011

This paper puts forward a simulation program of crystal growth, using TSSG method which is based on the finite element simulation technology. The core program FETSSG is developed on the basic of the finite element analysis software ANSYS. By using this program, we can simulate the process of crystal growth in all kinds of process conditions, and the numerical results include the single crystal furnace temperature field and fluid flow velocity field. These numerical results are in consistent with the laboratory results, which are valuable to the users.
Precision Influence of Sickle-Like Curve of Hot Rolled Strip on Rotary Shear's Cutting
Authors: Ji Jin Peng , Sun Lin , Li Jian Wen
Published: December 2011

Push-pull pickling line of a branch of WISCO frequently comes up the faults that rotary shear axial locking is unreliable and the cutting precision is low. To solve this problem, two kinds of sickle-like curve have been analyzed, the graphic method and the finite element method were used. The research come to the conclusion that frequent appearance sickle-like curve would produce additional axial impact load on rotary shear's shear blade and also calculated value of axial static load. These are the main reason why the faults appear. After took the proposed solutions accordingly to improve the locking force, the down time were greatly reduced and the cutting precision were improved significantly.
Feed Speed Design and Optimization in Radial-Axial Ring Rolling Process by FEM
Authors: Liu Shi Biao , Wang Ke Lu , Lu Shi Qiang , Li Xin , Dong Xian Juan
Published: December 2011

Radial-axial ring rolling is an important component of advanced manufacturing technology, but it has characteristics of high nonlinear on geometry and physics, so the radial-axial ring rolling process becomes very complex. In addition, the feeding mode of core roller has enormous influence on the quality of the rolled ring as well as the stability of the process. In this paper, a 3D rigid-plastic FE model of radial-axial ring rolling process is established, then three kinds of feed speed design ((1)constant of feed speed; (2)constant of feed in one rotary; (3)variation of feed speed)are offered. The difference of outer radius growth velocity, distribution of effective strain and temperature, rolling force, size of ring are analysised for the three kinds of feed methods. And, an optimized feed method is proposed base on analytic results, the optimized feed method can improve the quality of formed ring, and decrease the requirement of ring rolling mill.
Numerical Simulation on Residual Stress Generation in the Crack Tip of ASME P92 Steel
Authors: Jiang Yun Jian , Jing Hong Yang , Xu Lian Yong , Zhao Lei
Published: December 2011

In the present study, the residual stress generated in the crack tip of compact specimens was investigated in order to analyze the effect of residual stress on the creep crack growth. Residual stresses were generated using loading in compression beyond yield and then unloading. The maximum region of residual stress in the crack tip was obtained by numerical simulations which calculated the effect of notch radius and penetrated stress. It was found that a 2.5 mm notch radius with the applied stress at 36 KN could generate the largest extent of residual stress ahead of crack tip in the compact specimen. Further, when the specimen was heated to a high temperature, the value of residual stress reduced while the distribution changed little.
Research on Construction of E-Intelligence Maintenance System
Authors: Ge Meng , Jiao Yan Li
Published: December 2011

Taking on the features of agility, intelligence, Internet and socialization in the wake of rapid expansion of global manufacture and cutthroat competition, to establish an e-intelligence maintenance system is crucial for manufacturing enterprise to reduce costs and increase profits in the global market. Based on the analysis of requirement for e-intelligence maintenance in manufacturing industry of our country, this paper puts forward a total solution to e- intelligence maintenance system. Moreover, it expounds in particular the system realizing technology, viz R&D methods and process to set up a framework based on .NET Framework. The key realizing technology is including grid-based computing model, system prototyping development, and development of personalized maintenance service kit.
Space Contraction and Partition Algorithm for Combinatorial Optimization
Authors: Gao Yong Chao , Liu Li Mei , Qian Heng , Wang Ding
Published: December 2011

The scale and complexity of search space are important factors deciding the solving difficulty of an optimization problem. The information of solution space may lead searching to optimal solutions. Based on this, an algorithm for combinatorial optimization is proposed. This algorithm makes use of the good solutions found by intelligent algorithms, contracts the search space and partitions it into one or several optimal regions by backbones of combinatorial optimization solutions. And optimization of small-scale problems is carried out in optimal regions. Statistical analysis is not necessary before or through the solving process in this algorithm, and solution information is used to estimate the landscape of search space, which enhances the speed of solving and solution quality. The algorithm breaks a new path for solving combinatorial optimization problems, and the results of experiments also testify its efficiency.
A Graph and Matrix Based Approach for Stamping Operation Sequencing for Progressive Die Design
Authors: Chu Chang Yong
Published: December 2011

Two graphs are introduced to describe the precedence and cluster constraints among stamping operations, i.e., operation precedence graph and operation adjacency graph. A graph colouring algorithm clusters the operations based on both the precedence and adjacency graphs to form joint operations. A joint operation matrix is then generated. A matrix based algorithm is presented to iteratively order the joint operations to generate the final sequence according to the index of priority for each operation. The algorithm is implemented in C++ and is fully integrated with SolidWorks CAD system. A case study is presented to illustrate the algorithm.
Research on Effect Chain Model with Prolog
Authors: Su Huan Huan , Gao Chang Qing , Yang Bo , Lv Bing
Published: December 2011

Conceptual design is the most innovative stages in the life cycle of product development, and effect is the solving tools of TRIZ based on knowledge. The use of effects to solve the problem of conceptual design stage can improve the efficiency of Innovative design and competitiveness of enterprises. The problem-solving process of effects applied was described in this paper. In PROLOG environment, the knowledge representation was used to write the effect as expert knowledge base, and then the reasoning mechanism was used to make a simple expert system of effect. It also can be used to help designers check and resolve the design issues more conveniently.
Cost Estimation of Product Life Cycle
Authors: Ma Zi Qin , Xu Ting Ting , Sun Li , Wang Xiu Lun , Fan Jian Min , Sun Ai Qiao
Published: December 2011

The cost estimation of the product life cycle was researched. On the one side, the life cycle cost present value for manufacturer was estimated, including mainly of target cost, service cost and fault compensation. And a life cycle cost estimation model for manufacturer, which combines target cost and proportion cost estimated, was proposed. On the other side, the life cycle cost present value for user was estimated, including mainly of purchase, installation, commissioning costs in beginning and labor, maintenance, depreciation, maintenance costs in operations. And another life cycle cost estimation model for user, which combines process cost and proportion cost estimated, was proposed.
Research and Design of MES Based on Real-Time Database in Iron & Steel Enterprise
Authors: Chen Lun Wei , Luo Rong , Luo Ping , Li Qiang Jiao
Published: December 2011

Aiming at the status of the bottom automation system and upper management information system was not effectively integrated in iron and steel enterprise which leads to the delay of production data and the difficult of tracking production process, MES based on real-time database, in which production data is collected, analyzed and processed in real-time using real-time database technology, is researched and designed in this paper, it can optimize production planning and scheduling management level and greatly enhance the production efficiency and promote the core competitiveness of enterprise.
An Optimization Opportunistic Maintenance Policy of Multi-Unit Series Production System
Authors: Hou Wen Rui , Jiang Zu Hua
Published: December 2011

This paper proposes an opportunistic maintenance policy for the multi-unit series production system, which is on the basis of the failure rate analysis. When system halts for performing preventive maintenance or opportunistic maintenance, the alternative decision of replacement and repair is made by economic evaluation of two types of maintenance actions. The optimal preventive maintenance plans in a finite time horizon can be obtained by adjusting the preventive and opportunistic maintenance threshold. A numerical example is given for illustrating the applications of the policy.
Situation Analysis about Cold-Chain Logistics in China Based on SWOT Analysis
Authors: Hu Yong Ju , Yao Li Hong , Qiu Xin
Published: December 2011

A complete cold-chain logistics is an indispensable element of food safety. The main purpose of this paper is to perform the situation analysis about cold-chain logistics in china based on SWOT analysis method. The detailed content includes the internal and external environment, the faced the problems, the opportunities and threats of cold-chain logistics development in China. Based on the comprehensive consideration of cold-chain logistics of China, the corresponding development direction of China's cold chain logistics were put forward.
The Application of Car’s Parting Lines in Optimizing Car Styling & Assembly Process
Authors: Lan Wei , Sun Ming Yang , Fan Feng
Published: December 2011

Abstract. The paper discusses the importance of the parting line design on the overall look and feel of the car styling. In addition, it also touches upon how parting line design can indirectly impact the car assembly process. The paper includes four case studies to showcase the application of parting lines.
Research on Concept System of Translation Symmetry in Mechanical Systems
Authors: Ma Zhi Yong
Published: December 2011

Translation symmetry widely exists and plays an important role in mechanical systems. On the basis of research on the condition and mode of existence of translation symmetry in mechanical systems, according to the directivity and the alternations of symmetry components, the dimensionality and the closed circle of symmetry benchmark, the concept system of mechanical translation symmetry was established, and was explained and verified by accurate instances. The concept system is the foundation of further research on the application law of translation symmetry in mechanical systems.
An Intake Three-Pipeline Model Using Experimental Optimization for a Small Engine
Authors: Shih Chien Jong , Chang Ting Hao , Teng Tso Liang
Published: December 2011

The ideal performance of a small engine requires changeable intake pipeline volume while engine speed varies, as been recognized in former study. However, an intake pipeline with changeable volume is tremendously difficult to achieve. This paper presents an innovative three-pipeline model by experimental design optimization to simulate a simple changeable volume pipeline. The primary goals contain the promotion of lower-speed torque, the fuel consumption; emissions of CO and HC are expected to reduce simultaneously. The optimum diameters, lengths of three pipelines, and the proper timing of switching three valves among lower speed pipe and higher speed pipe can be obtained by proposed integration method
Research of Conceptual Design of Electromechanical Products Based on KBE
Authors: Wang Ke , Gao Frank , Peng Jia , Wang Jie
Published: December 2011

This document proposes a method of conceptual design of electromechanical products based on KBE(knowledge-based engineering), in order to improve the efficiency of the conceptual design about electromechanical products and avoid the repetitive work of the traditional design, then establishes a system model for that. it completes the conceptual design of products through data mining, rule-based reasoning and other key technologies. A case of reducer design shows that the method is feasible and practical for the conceptual design of electromechanical products.
An Error Compensation Method for Structural Responses and Sensitivities
Authors: Wu Xiao Ming , Liu Chun
Published: December 2011

Abstract. The computation of the responses and their design sensitivities play an essential role in structural analysis and optimization. Significant works have been done in this area. Modal method is one of the classical methods. In this study, a new error compensation method is constructed, in which the modal superposition method is hybrid with Epsilon algorithm for responses and their sensitivities analysis of undamped system. In this study the truncation error of modal superposition is expressed by the first L orders eigenvalues and its eigenvectors explicitly. The epsilon algorithm is used to accelerate the convergence of the truncation errors. Numerical examples show that the present method is validity and effectiveness.
Reverse Analysis for Determining the Stiffness Characteristics of Suspension Spring with Variable Pitch and Wire Diameter
Authors: Ji Jie , Li Yun Wu , Zhao Jin Dou
Published: December 2011

A reverse analysis method for determining the stiffness characteristics of nonlinear suspension spring with variable pitch and wire diameter is developed by introducing the ideas of dispersion. Meanwhile, the reverse analysis of a nonlinear suspension spring used in truck is completed as an example, and the progressive force-displacement curves obtained by theoretical and experimental analysis are compared in order to verify the validity of the reverse analysis method used for nonlinear suspension spring.
Aerodynamic Power of Geotechnical Centrifuge
Authors: Yin Yi Hui , Dou Lin Long
Published: December 2011

The calculated aerodynamic power by using formulas in references is always much less than practical one. The reason was found through analyzing the transformation of mechanical energy output by the motor to heat energy of the whole system and motion energy of the air newly getting in based on the relations of moment equilibrium. New formula of aerodynamic power and equation of air following flow ratio were deduced for closed chamber and holed chamber geotechnical centrifuges. The aerodynamic powers of one constructed closed chamber geotechnical centrifuge and one constructed holed chamber geotechnical centrifuge were computed by using different formulas and the results were compared with each other as well as the practical values, respectively. The comparisons show that the new formulas are much more accurate than previous ones in references.
Study on Multi-Functional Experimental Apparatus for the Performance Evaluation of HTHP Drilling Fluid
Authors: Wang Fu Hua , Wang Rui He , Tan Xue Chao
Published: December 2011

With the development of deep well drilling technology, a new HTHP (High Temperature High Pressure) experimental apparatus LH-1 was developed to meet the need of research and evaluation of deep well drilling fluid. With the advanced dynamic seal technology, mechanical transmission and data sensing technology, this new apparatus has many kinds of HTHP testing functions in a body and could evaluate manifold performances at the dynamic state of high temperature and high pressure including HTHP dynamic or static filtration test, high temperature dynamic scattering test of drilling cuttings, HTHP dynamic sealing and plugging tests, ultra HTHP aging test and so on. The lab tests show that the new apparatus gains such advantages as novelty of the design, stability of the performance, accuracy and reliability of the experimental data and facility of the operation. Having overcome the defections of the old apparatuses, the new device can provide a new means of experimental researches for the evaluation of HTHP comprehensive performance of deep well drilling fluid.
Modeling and Simulation of the Speed Regulating System of a Planetary Mixer
Authors: Yang Ming Jin , Li Xi Wen , Wang Zhi Gang , Shi Tie Lin
Published: December 2011

Hydraulic drive mixers are widely employed to process the cohesive mixture, especially the energetic mixture. According to the mathematic models of main links of the speed regulating system of a hydraulic drive planetary mixer, a simulation model for the system was presented in this paper. The load and impulsion have impacts on the speed response of the speed regulating system with good performance of stability. The converted rotary inertia of the hydraulic motor has a two-sided impact on the speed regulating system, namely impact the response and the overshoot performance at the same time. And, the leakage of the hydraulic drive system often has a bad impact on the speed response of the regulating system.
Design and Implementation of PoE System Compliant with IEEE802.3af
Authors: Li Meng , Ren Bo
Published: December 2011

This paper introduces the principle and method of PoE,and adopts LTC4263 and LTC4257 to design the system of PoE compliant whit IEEE802.3af, and realize the circuit. The design can provide DC for low power dissipation LXI、IP phone、AP、IPCAM and some terminals base on ethernet, when they are transfeting the data signal. As adopted double power supply, it can improve the transmission current, to improve output power, can make the capacity of electric power supply of PoE move higher, and can be power supply mode of general-purpose equipment.
Realize the Mechanics Model in Hoisting Steel Ladle with the Method of Concentric Circles Annular Load
Authors: Jiang Shi Bo , Liu Jie , Fang Ting
Published: December 2011

In view of the trial-hoisting problem in the trial-production process of big steel ladle, Simulate the standing force condition with the method of concentric circles annular load. This paper has built deduced, analysed and calculated the mechanics model and formula of steel ladle with elastic mechanics theory. After practised and improvement, this method already had become the checking process of steel ladle.
Virtual Iinstrument Based Test–Bed for the Hydraulic Pump Performance Measurement System
Authors: Zhang Li Ping , Cheng Bo , Song Du Juan
Published: December 2011

The computer-aided test is very important in testing the characteristic of the hydraulic pump system; it can make the system respond rapidly, get the result more accuracy and have the visual results. In this paper, the LabVIEW software is used in the hydraulic pump performance measurement system; all the instruments and measurement parameters needed by the system were designed based on LabVIEW. For example, the signal gathering; the data processing, save and display; the curve drawing and the error processing, and so on. Two basic and important experiments are carried to validate the test system, and the results show that the measurement system can be used in laboratories and industry occasions. The measurement system can reduce some instruments, short down the test cost and the test time greatly. The software programmed by the pattern of modularization, that makes programs has a clear structure, easy to be read, maintain and expand its function.
Study on the Energy Analysis of the Wetland Ecosystem of Qinghai Lake
Authors: Hu Yuan Dong , Wu Yan , Wang Quan Deng
Published: December 2011

Based on the theory and method of energy analysis originated by H.T.Odum, the typical wetland of Qinghai Lake was studied. With the method of energy analysis, the value of renewable energy was estimated at 1.96×1022 sej, with a monetary value of $2.45×108. The energy value of capital input/output was 1.87×1022 sej, with a monetary value of $2.32×108.The energy value of waterfowls was 1.10×1024 sej, with a monetary value of $1.37×1010. The energy value of aquatic product was 2.94×1023 sej, with a monetary value of $3.66×109. It is clear that the total energy value of waterfowls and aquatic products exceeded 90%, the highest in the entire ecological system of Qinghai Lake wetland. The result indicated that emphasis should be placed on protection of waterfowl and fish resources of Qinghai Lake under the condition of effective protection and rational utilization of the values of ecological service of Qinghai Lake wetland. Furthermore, intensified development of ecological tourism and strengthened scientific research should be a key direction in future.
FPGA-Based Micro Fiber-Optic Spectrometer Hardware Circuit System
Authors: Gu Yu Hai , Jiang Jian Ming , Xu Xiao Li
Published: December 2011

Portability has become an inevitable trend of spectrometer. Faced with the trend, one micro fiber-optic spectrometer hardware circuit system, which regarded XC3S250E as master chip to control CCD scan, A/D conversion and USB data transmission, etc, was designed, and the corresponding circuits were designed. After consecutive spectral scan test, we can find that the designed spectrometer is able to complete the acquisition, conversion and transmission of spectrum. The system stability is very good and the scanning accuracy can reach 1nm.
Optimal Design of Concrete Pumping Displacement Control
Authors: Wang An Lin , Shi Zhong Qiu , Yuan Cai Xing , Hu Yu Qin
Published: December 2011

To solve the problems of concrete piston striking cylinder and pumping insufficiency caused by the mismatch between varying loads and system’s open-loop control property, the optimal model of concrete pumping displacement control was built.To be precise, the displacement control signal parameters were taken as control variables, and the location parameter of the main cylinder’s displacement sensor was taken as structure variable. under the physical constraint condition of non-collision between piston and cylinder, the piston stroke maximizing was taken as objective function and the optimal model of concrete pumping displacement control was built.Optimization result shows that piston of concrete pumping system don’t strike cylinder and pump sufficiently under varying loads.This optimal model, which is built in the integration design space of structure variable and control variables, is of guiding significance for solving open-loop system’s engineering control problems.
The Design of an Online Measuring Instrument for Rolling Guide Grinding Process Size
Authors: Xu Feng Hua , Wang Sheng Huai , Chen Yu Rong , Xie Tie Bang
Published: December 2011

For the online measurement of rolling guide grinding process, the design of an online measuring instrument for rolling guide-grinding size is introduced. This instrument has two sets of semiconductor lasers and photodiodes as the position detectors of workpiece, two sets of monolithic cutting parallel springs and voice coil motors as the drivers of probes, two sets of inductance displacement sensors as the size detectors. The rolling guide grinding size can be measured online by this instrument using the relative measurement method with data acquisition card, industrial control computer and top controlling software. This instrument has satisfied the operating requirements with practicality and reliability which is verified by the measurement results.
Selection of Sample Size in R&R Analysis of Variable Measuring System
Authors: Zhao Hui Zhen , Zhang Ju Tao , Li Zhong Shan
Published: December 2011

Measurement System Analysis is of vital importance in a Six Sigma project. Variable measurement system takes the advantage of being practical and efficient. This paper focuses on the effect of sample size selection on error estimation of repeatability and reproducibility(R&R). After the discussion about the interval estimation of relevant statistics of R&R, this paper continues to analyze how the confidence interval is influenced by the number of operators, the number of samples and times of repeating measurements and a reasonable sample size in assessing the R&R of a measuring system is established for more effectiveness and efficiency.
An Observer and Observer Based Modeling Lateral Dynamics For Moving Steel Strip
Authors: Ye Jing Jie , Cen Yu Wan , Ye Xiao Hua , Xu Pei Min , Pan Zi Wei
Published: December 2011

The steel strip processing systems rely on accurate lateral positioning to achieve high processing speeds and improved product quality. In real steel strip process systems are not just nonlinear and time-varying but also highly uncertain. This research focuses on the disturbance estimation approach to modeling unknown dynamics of physical plant. The Euler’s beam theory with boundary condition is considered to derive the equation of the moving steel strip. To consider unknown dynamics in the real steel strip, a nonlinear state space equation is employed to describe unknown dynamics of the moving steel strip. The nonlinear part of this system is proposed as an unknown disturbance input to this system. The neural-based observer (NNO) is designed to estimate nonlinear unknown dynamics. The online weight-updating mechanism is a modified version of the backpropagation algorithm with a simple structure together with an error-modification term added to guarantee the robustness of the observer. The measure of sensor and estimation of observer pair of input and output is used to train the weight of NN. The simulation and measure result shown that the NNO can track the un-modeling dynamic of nonlinear systems.
On-Line Monitoring System for Monitoring SO2 in Fumes (1) — Monitoring Subsystem for SO2 Mass Concentration
Authors: Wang Shi Long , Wang Li Na , Wang Hong Bo , Cai Yong Hui
Published: December 2011

In order to achieve the target of controlling SO2 emissions in fumes in a short period of time in China, a SO2 on-line monitoring system (CEMS) has been developed by the authorased on the principle of electrochemistry. This system consists of two subsystems: (1) SO2 mass concentration monitoring and (2) SO2 flow velocity and flow rate monitoring. In the paper, the procedure of system and working principle and method of SO2 mass concentration monitoring subsystem are described in detail (SO2 flow velocity and flow rate monitoring subsystem is described by another paper).Two subsystems work synchronously to monitor and calculate the SO2 emissions, then the on-line monitoring of SO2 emissions is achieved. Through experiment and testing, monitoring result of the system is stable and reliable, which has reached the national monitoring standards and passed the appraisal.
A Feature-Based Approach to Path Planning for in-Process Probing Operations in STEP-Compliant NC Manufacture
Authors: Liu Ri Liang , Liang Xi Hui , Zhang Cheng Rui
Published: December 2011

With STEP-NC providing a way for seamless integration of the design, manufacturing, and quality control processes, the implementation of in-process measurement in this context has become a necessity for STEP-compliant NC manufacture. In the light of current research and development trends in this field, this paper proposes an approach to on-machine planning for in-process measurement, focusing on touch probing operations. Issues about the measured elements and the probing path planning are mainly addressed, and a prototype system is designed and implemented, which generates probing paths based on the information contained in the STEP-NC part program. The feasibility of the proposed approach is demonstrated with an example STEP-NC file.
Design of High-Pressure Waterjet Descaling Nozzles Testing System with LabVIEW
Authors: Ma Fei , Yang Nan , Liu Ya Yu
Published: December 2011

The descaling technology with high-pressure waterjet is widely used in hotrolling process. Waterjets from descaling nozzles play a crucial role on surface quality of hot-rolling steel billet. Since structure of a nozzle accounts for characteristics of the waterjet produced, nozzle structural data are very important for hotrolling billet descaling. However, some of nozzle structural data can only be obtained through experiment due to machining tolerance generated during the factory production of the nozzle. A set-up investigating descaling nozzles performance was established. Laboratory Virtual Instrumentation Engineering Workbench (LabVIEW) was applied to develop a testing system of the set-up, through which the real-time measurement of descaling nozzle data could be achieved. The testing system included three modules, pressure-flow curve, three-dimensional(3D) platform movement track and jet impact force measurement. All the nozzle structural data and water jet performance could be obtained by means of the modules. A GPZ10-type nozzle used for scale removal was tested. Results obtained were presented and discussed.
Study on Lithium Niobate Wafer Bonding and Thinning
Authors: Yang Yu Hua , Yang Xu Jun , Liu Gang , Kai Wang , Lei Cheng
Published: December 2011

LN is a kind of pyroelectric material. It can be made into a sensitive layer belonging to photoelectric detector’s sensitive element. Usually, the thickness of LN wafer is 0.5mm and that is beyond the requirement for thickness of photoelectric sensitive element. Due to that, LN wafer must be disposed of by bonding, thinning and polishing process. The process mainly contain RZJ-304 photoresist bonding, grinding, polishing, stripping liquid stripping and acetone cleaning. After processed, the dimension of LN wafer is 10mm×10mm×50um. The surface of LN is very smooth, and the surface roughness is 1.63nm.The test shows that the disposed wafer’s peak value of pyroelectric signal is four times as much as that of undisposed one.
A Preliminary Study on Efficiency of Air-Lift Upwelling
Authors: Lu Ling , Pan Hong , Fan Wei , Cai Yong
Published: December 2011

Upwelling of deep seawater using air-lift system to the region, where sunlight reaches, can produce the ocean farm since deep seawater contains high concentration of nutrient such as nitrogen and phosphorus. The efficiency of air-lift upwelling along a 300 mm diameter vertical pipe has been studied in this paper. Using a plexiglass pipe as the upwelling-pipe, a laboratory experiment was performed in a 4.5 m deep tank to obtain the flow rate ratio of water to gas. We also performed numerical experiments using commercial CFD software FLUENT 6.3 based on conditions of experiment. Both the experiment and simulation have shown promising results that the upwelling flow rate increased as the injection air flow rate increased, and there was a good lineal relationship between them in a certain range. The value of the lifting efficiency is about 2-3. Further work will have to determine the efficiency of air-lift upwelling under real ocean conditions and the minimum power of air pump required to sustain air-lift system.
Research on Asset Allocation Model of Pension Fund in China
Authors: Wang Mei , Han Li Yan , Yang Yan Sui
Published: December 2011

The preservation and appreciation of pension fund is the core of the whole pension system. As the cash for daily life of the retiree, the investment rate of return of pension fund has to be higher than Consumer Price Index (CPI) in order to maintain the purchase power of pension and play a security role. On the basis of Markowitz theory, the constraint of CPI was added in this paper. The weight of all assets in optimum portfolio and the minimum variance of the portfolio under current financial market were calculated by Matlab software in China. Finally, suggestions on reforming investment policies of pension fund in China were given.
Treatability of Phenol by Supercritical Water Oxidation
Authors: Li Hui , Zhao En
Published: December 2011

This study focused on the treatment of phenol wastewater by supercritical water oxidation(SCWO). Tests were conducted by using a continuous-flow reactor system. Based on COD, organic destruction efficiencies of phenol wastewater were obtained at supercritical water conditions. Temperatures and pressures, respectively, ranged from 400-500°C,and 25-40Mpa. The reaction times varied from 30 to 190 seconds, and hydrogen peroxide was used as oxidant. Under SCWO conditions, destruction efficiencies greater than 99% were achieved.
Two-Phase Flow Analysis for the SX Type Static Mixer
Authors: Wu Qing , Wang Xiao Bei , Li Quan Lai , Yang Yan Xiang
Published: December 2011

The two-phase flow field of SX type static mixer is analyzed in this paper. The comprehensive influencing factors are considered during analyzing the relationship of two-phase flowage parameters in practical device. Then the theoretical study is carried out. The two-phase flow is impinged, separated, flowed around and merged. The mixture effect is strengthened. The analytic calculation is carried out according to the practicable turbulent flow pattern and the results is useful for the structure parameters effectively selection and the characteristic optimization.
Waste Tire Free Shear Breaking and Design of Hydraulic System
Authors: Qiu Li Jun , Yang Jia
Published: December 2011

In the development of waste tire rubber powder processing, reasonable integral tyre cutting into several parts. Direct shearing tear into pieces the tire shear into a few cm irregular rubber block, on a steel belt layer and colloid separation. The free state of tires in the shear process of the rubber block with larger volume, the volume of the rubber block into the next procedure shear stress changes caused by large, beyond the motor power or drive belt slipping phenomenon, to mechanical operation and management inconvenience. The effective control from the tire shear rubber block size and volume can reduce the powder production process in electric power consumption. For the free shear tyre is difficult to guarantee the initial shear rubber block volume, used to control the cutting width can be achieved for the tire shear rubber block control.
Study on the Drying Mechanism and Dynamics of Palygorskite
Authors: Ma Jiang Quan , Lu Qing Ling , Xia Jun Hao , Gan Xiao Bin , Yao Chao
Published: December 2011

Palygorskite had large applications in chemical, environmental protection, medicine processes and so on. However, since the mineral limitations of natural palygorskite, both improving its quality and meeting the need of industry, palygorskite usually needs to be activated before using it. The influences of activation during the drying process were studied, as well as the drying kinetics of the non-activated of palygorskite. The results showed that the drying rate of palygorskite increased at first, and then came to a constant value, and kept that value for some time. After that, drying rate decreased with time going. Compared with drying curves of the non activated palygorskite, the samples made some changes after activation. The drying process of non activated palygorskite could be described as the equation of MR=exp(-ktn). The diffusion activation energy (E) of non activated palygorskite was equal to 17.14kJ•mol-1, former factors of Arrhenius was equal to 4.19×10-5 m2•s-1.
The Degradation Features of Ancient Lu Embroidery Fabric
Authors: Hang Yin
Published: December 2011

The present study focus on the degradation features of ancient Lu Embroidery have been discussed from the molecule structure of protein via the infrared spectrum and XRD analysis. The ancient Lu Embroidery has N-H feature absorb peak at wavenumber of 3300 in the infrared spectrum. The XRD analysis of ancient Lu Embroidery fabric shows that the peptide in the un-crystallization can be depredated quickly and the crystallization is relative slow.
Perfect Dynamic Model and Optimal Design of Vibration-Impact Rammer
Authors: Chen Ke , Duan Zhi Shan , Fei Jia Qi
Published: December 2011

In order to find a better method of optimal design of vibration-impact rammer, perfect the dynamic model of vibration-impact rammer. Based on the viscoelastic-plastic theory of soil body, the dynamic model and equation set of vibration-impact rammer and soil body system are built. After computer programming, the real-time working data of vibration-impact rammer is obtained and a new method for optimal design of vibration-impact rammer is provided.
Study on Pre-Planning and Design of a Hotel
Authors: Li Tian Jiao
Published: December 2011

Along with sustainable and rapid development of economy, the hospitality industry is improved significantly. Based on the pre-planning and design of a hotel, the general layout, functional division, environmental planning and landscape design of the hotel are discussed. Though the analysis, the green design of the hotel are researched. The results show that the pre-planning and design of the hotel is an important direction of hotel development. Only the pre-planning and design of the hotel are good enough, the individual and social path of sustainable development of the hotel can be reached and the hotel can remain its competitive at the fierce market competition, which provides a guide for continuous pre-planning and design of a hotel.
An Implement of Virtual Campus System Base on the X3D Technology
Authors: Liu Li Ping , Wang Yu Jian
Published: December 2011

For searching a balance between networked virtual campus real-time rendering scene and precise modeling, this paper proposed a method of constructing virtual campus system. The method based on the latest X3D technology, using AutoCAD and 3DS MAX as the development and optimization tools, realizing interactive browse in the Web. Software developed using this method has been actually used for the display of a university campus.
The Design and Performance Analysis of Friction Disk Type Limited Slip Differential
Authors: Yu Xiu Yi , Hou Liang , Liu Pi Jing , Lin Wen Guang
Published: December 2011

Aiming at the ability to adapt to different road conditions of limited-slip differential(LSD) in drive axle, by building the without preloading friction disk type limited slip differential mechanical model, We derive the theoretical formula of the locking differential coefficient of the theoretical formula of limited slip differential without preload friction disk from mathematical theory derivation, and fitted theoretical curves, Which can be used as reference for further studies on other limited slip differential. Experimental verification was applied to the designed drive axle, experimental results shows that, the actual performance parameters of each drive axle design values consistent with the theory, to prove the correctness of the theoretical derivation, proved the correctness of theoretical analysis.
A Holder Type Estimate for an ill-Posed Cauchy Problem for the 3-D Heat Equation
Authors: Jia Xian Zheng
Published: December 2011

In this paper, we get a holder type estimate for the 3-D heat equation.Weight function method is used to prove this result.
Mid-Profile Design and Numerical Simulation for Supercavitating Vehicle
Authors: Li Yu Tian , Zhang Yu Wen
Published: December 2011

Based on elliptic curve equation and G.V.Logvinovich cavity geometrical equation, the mid-profile of supercavitating vehicle was researched. The author uses Navier-Stokes equation and k-ε turbulence equation to simulate the designed geometry shape depending on structure grid. The beneficial results show that the mid-profile design for supercavitating vehicle is able to integrate and control the partial attached cavitating flow, and enable the cavity proximate shape to the elliptic shape. As a result, the cavitating reflow phenomenon influenced by tail nozzle contraction at the rear of the supercavitating vehicle could be mitigated, and in a certain range of curvature, the drag reduction performance is better than that of the cylindrical method. The research is able to effectively increase the fullness of the supercavitating vehicle in the mid-profile, and so it is quite superiority.
Remote Control Deep Well Rescue Machine
Authors: Zhang Bao Guo
Published: December 2011

In real life, deep well trapping accidents of people frequently occur，but no appropriate and effective rescue equipment is available. After site investigation and analysis, we hereby design a sort of remote control deep well rescue machine, in which the components are free to remove，the length can be freely adjusted according to the depth of wells. The bottom of the device is provided with mechanical hands and chassis with airbags. By controlling the robot with remote control technology, the device solves the problem that the rescue workers can not perform direct rescue on the victims due to the small width of the well mouth. A camera is installed at the lower part of the device, which enables the rescuers to accurately observe the underground situation, thereby solving the problem of being unable to accurately locate the trapped people with human eyes due to the smallness of the well mouth and insufficient light.
Study on the Electro-Hydraulic Power Steering System Based on AMESim and Simulink
Authors: Lu Wen Chang , Niu Geng Sen , Long Chen , Wang Ruo Chen
Published: December 2011

In this paper, the model of EHPS is built on AMESim and MATLAB / Simulink software platform, co-simulation is carried out in the AMESim and Simulink integrated simulation environment with the use of fuzzy adaptive PID control strategy. The results show that EHPS mechanical dynamics model and control algorithm in the paper are correct.
Modeling of Feed-Rate Prediction for Small Segment in High Speed Machining
Authors: Xie Dong , Ding Jie Xiong , Huo Yan Bo , Du Li , Wang Wei , Song Zhiyong , Shi Rongbo
Published: December 2011

In the complex high speed machining, the small segments approximated the contours curve are made up the machining path in order to satisfy the quality. It will cause break on the machine tool feed-rate, and due to limit of dynamic performance in each axis, the actual velocity will somewhat differ from the desire feed-rate, which will cause additional error on the contour. An actual feed-rate prediction model using the G-code generating from CAM system is presented in this paper, which the limits of velocities, acceleration, jerk and the case of velocity verify between segments are taken into account, the every axis actual speed and tool feed-rate, and points that programming feed-rate is not achieved in the region of its curvature mutations are calculated. The simulation results show the prediction model is efficient and can support the analysis on axis dynamic performance in high-speed machining.
Performance of Pressure-Exchange Ejector at Different Port Pressure
Authors: Zhao Wen Jing , Hu Da Peng , Liu Pei Qi , Dai Yu Qiang , Zhao Jia Quan
Published: December 2011

Pressure-exchange ejector is a novel device which can transfer energy between fluids by pressure waves, so the pressure of each port is very important. A prototype was designed and the experiment system was set up. The performance of pressure-exchange ejector at different overall pressure ratio and outlet pressure was investigated. Results showed that the entrainment ratio of pressure-exchange ejector reduced with larger pM, while the overall isotropic efficiency tended to go up with increasing outlet pressure pM and then falled down. Higher efficiency could be obtained when the outlet pressure was close to the average pressure of the channel after a cycle. Besides, the efficiency of pressure-exchange ejector decreased as the overall pressure ratio increasing. The maximum efficiency was about 60% when pH/pL=1.5, while for pH/pL=2.0, the maximum efficiency reduced by 15%. However this value was also much higher than that of the steady flow ejector. The excellent performance makes pressure-exchange ejector a promising device for natural gas exploitation.
Control System Design of a Novel Fan Shaft Sleeve Automatic Processing Machine
Authors: Zeng Min , Chen Guang Hui , Wei Liang Hong , Cui Shi Ming
Published: December 2011

The fan shaft sleeve is a very important part of the fan-related machine and has high demand for precision. At present, due to the lack of machine that exclusively for sleeve processing at home, the sleeve production largely depends on manual labor which yields very low productivity. This paper introduces an automatic machine for fan shaft sleeve processing which introduces the Omron PLC as the hardcore of the control system. The machine proposed also includes a cam splitter. Controlled by motors, clutches and retarders, the splitter provides 6 stations for feeding, drilling, taping, milling, chamfer and discharging. Driven by 3 phases AC motors and air tanks, the machine can mange the fan shaft sleeve processing automatically and achieves high productivity and quality.
Engaging Materials in the K1 to K12 School Environment as the Foundation for Engineering and Technology
Authors: Blicblau Aaron
Published: December 2011

There is a need to re-vitalize science and technology education to suit today’s world. The specific aim for this study is to determine how school science in early years of schooling impacts on years 11 and 12 science studies in the areas of materials science, and subsequent further tertiary studies. Public education records were investigated to obtain post hoc enrolment data to establish trends and decline in enrolments in physics and chemistry in the final years of high school which revealed a trend in enrolments falling over a ten year period. The student population in science of physics and chemistry were not well prepared for future studies and are a challenge for students undertaking engineering and technology studies at a tertiary level. It is proposed that primary and high school science subjects be made more popular by integrating popular aspects of materials in everyday life, so making science an appealing part of the syllabus. Initiating these syllabus changes will enhance the way science subjects are taught to encourage studies into engineering.
Design and Research of Embedded Precision CNC Internal Grinder Soft-PLC System
Authors: Xie Ou , Li Hua , Yin Zhen
Published: December 2011

According to the processing and control requirements of precision CNC internal grinder, a design of ARM-based embedded precision CNC internal grinder soft-PLC system was proposed. The design idea of embedded system hardware and software components was introduced to develop the PLC applications, achieved the logic control of the machine tool. This design meets the requirements of software design instead of hardware design and system integration of embedded CNC system development and it also meets the requirements of modular design of open CNC system development.
The Criterion of Red Blood Cell’s Fragmentation and the Turbulent Flow Field Simulation Analysis in the High-Speed Spiral Blood Pump
Authors: Yun Zhong , Tang Xiao Yan , Xiang Chuang , Shi Fen
Published: December 2011

For a blood pump, the injury to blood is a very important index of its performance. The strongly swirling turbulent flow in the internal flow field of a high-speed spiral blood pump(HSBP), is one of important factors leading to the fragmentation of the red blood cell(RBC) and the hemolysis. The study on the turbulent injure principle of blood in the HSBP is carried out by using the theory of the turbulent flow field and the hemorheology. The determinant gist on RBC turbulent fragmentation is obtained. The turbulent flow in the designed HSBP have been simulated and analyzed by using the multiphase suspend body CFD simulation technology. The simulation results indicate that the turbulence in the designed HSBP can meet the requirements of blood physiology.