bluuebunny/crossref_metadata_2025 huggingface dataset:
The Realization of SVPWM Based on LabVIEW
Authors: Cao Ling Zhi , Zhang Shun Long
Published: February 2012

Programmed and realized space vector pulse width modulation (SVPWM) program with dead-time compensation based on the graphical programming language LabVIEW and virtual instrument data acquisition device. SVPWM verified on the Digital AC PMSM Speed Control System, as shown in the experiment utilizing virtual instrument to realize SVPWM has such advantages as simply and rapid program development, high precision, strong real-time and fast response.
The Target Motion Detection Algorithm Based on Gauss Mixture Model
Authors: Bai Qiu Chan , Jin Chun Xia , Yang Ding Li , Wang Ma Hua
Published: February 2012

Background reduction technique not only has the characteristics of pixels identify changes and small time complexity, but also can provide better detection results. The paper puts forward the running average method constructing background image by Gaussian mixture mode detecting background region and foreground region, and then adopting background reduction realizes the detection of moving target. Experimental results show that the algorithm effectively may realize background extraction and updating, and then completely and accurately detects moving targets. The algorithm has been achieved good results in the video vehicle detection.
Research on the Relationship between the Characteristics of the Trustee and Trust in Construction Projects
Authors: Jiang Wei Ping , Zhang Qian , Le Yun , Fang Jian
Published: February 2012

There is in lack of trust in construction projects. It is criticized by many scholars. Trust has the function of decreasing transaction cost and improving project performance. The characteristics of the trustee have important function on occurrence of trust. More specifically, the trustee’s reputation, competence and promise keeping contribute to occurrence of trust.
The Design of Minibus Carpet Cleaning Machine
Authors: Shang Jiang Kun , Zhang Yan , Liang Dong
Published: February 2012

In this paper, the train’s carpet is treated as the objective of research. Based on in-depth analysis, the original mechanical system, which needed to be carried out auxiliary work manually, is further improved. Design and research automatic cleaning machine for the train’s carpet. To analysis and research, it can achieve a good cleaning effect and save a lot of labor.
Surface Finish Study of Hard Milling 45 Steel with PCBN Tool
Authors: Wang Rui Jie , Zhang Yong Liang , Liu Hong Bin , Du Mao Hua
Published: February 2012

Experimental study on surface finish of high speed mill of hardened 45 steel was carried out with PCBN tool. Cutting parameters studied include different cutting depth, cutting speed and feeding speed. Surface finish after cutting were measured and compared with that of grinding. Experimental results showed that for high speed milling of hardened 45 steel, the surface finish can be very fine, different cutting parameters all have explicit effect on surface finish.
Compatible Clustering Algorithm with Convex Space Partitioning
Authors: Wan Ren Xia , Yan Xiao Ya , Li Cai Xia
Published: February 2012

In this paper, we discuss the problem of compatible clustering, we propose a new compatible clustering algorithm based on pNCompClu[9]. The new algorithm adopts space partitioning technique to replace the point neighborhood mechanism of pNCompClu. Experiments show that the proposed algorithm can get some consistent clustering results, and theory analysis also demonstrates that the proposed algorithm has higher clustering precision than pNCompClu has.
The Analyzing of the Relationship between Function and Form in Industrial Product Design Process Optimization
Authors: Tang Jun
Published: February 2012

To optimizing the design of styling products is an important part of industrial design program in product development process, optimize the design of one of the important aspect is the form of product performance and again improve the process of re-combination, the functions and form factors is an important factor constraining the optimization process, the role of these two factors determined the cross-product form features. In the treatment of different shapes to optimize product design, according to their application environment, the use of factors, factors such as manufacturing of multi-disciplinary comprehensive evaluation method for product shape characteristics of trends analysis. Industrial design is the systems engineering closely linked to the market, people, technology, and environment. In the design of activities, always positioned as the highest pursuit of human needs, the technology of the best defined as the highest goal, the harmony between man and environment, defined as the highest level, therefore, the industrial design activity is an iterative adjustment of the direction and the optimization of methods to correct deficiencies in the process. Product development and design is to achieve the human needs of the carrier, the "most appropriate", "most optimization" is the market, people, technology, environment, close contact with the key, but also the significance of industrial design.
A Study of Genetic Algorithm Based on Niche Technique
Authors: Li Min , Chen Tian Huang
Published: February 2012

Compared to simple genetic algorithm which has a disadvantage of slow speed in early and later convergence, genetic algorithm which is based on niche technique and keeping the diversity of individuals, helps prevent prematurity and shows a better performance. The paper tries to solve the problem of multiple hump function optimization based on niche genetic algorithm. The simulation results show that the niche genetic algorithm can maintain the relative stability of diversity of individuals in the evolution process, speeding up the rate of convergence to a large extent.
Effects of Surfactants on the Characteristics of Y2O3 Dispersion Phase through Hydrothermal Synthesis
Authors: Ye Qing , Guo Zhi Meng , Hao Jun Jie , Liu Qing
Published: February 2012

Y2O3 dispersion strengthened iron-base powders were prepared by hydrothermal synthesis. Effects of surfactants on the size and distribution of Y2O3 dispersion phase were investigated. The structural and morphological properties were investigated by XRD and SEM. The results show that PVA is an effective addition for refinement and spheroidization of Y2O3. By adding 1 wt. % PVA, Y2O3 with size of 50nm and uniform distribution were achieved.
Employment Evaluation for University Student Based on Analytic Hierarchy Process
Authors: Tu Chun Hua
Published: February 2012

Employment evaluation for university student based on analytic hierarchy process is presented in the paper.The influencing factors of employment evaluation for university student are analyzed, and weights of employment evaluation indexes for university student is obtained. Employment evaluation of a certain university is employed to study the evaluation effectiveness of analytic hierarchy process.Finally,the evaluation values of the employment evaluation for university student of the university are obtained,which indicate that the evaluation level of the employment evaluation for university student of the university is ‘good’.The evaluation result is consistent with the actual situation,which shows that the employment evaluation for university student based on analytic hierarchy process is feasible.
Establishment of Energy Consumption Model of Compressors
Authors: Sun Ying
Published: February 2012

The traditional methods used to select refrigerating compressors need a large calculation, take much time and contain some estimating errors. To establish the energy consumption model of compressors can imitate the performance curves of compressor. It makes selecting compressor without chart and only concerned with condensation temperature and evaporation temperature, which greatly improves the speed and quality of selecting compressor.
Optimal Deployment for Mobile Target Tracking in Sensor Networks
Authors: Mao Ying Chi
Published: February 2012

Mobile target tracking is a key application of wireless sensor network-based surveillance systems. Sensor deployment is an important factor in tracking performance and remains a challenging problem. In this paper, we address the problem of optimal sensor deployment for mobile target tracking. We analyze the tracking performance of three patterns. Simulation results demonstrate that the irregular pattern outperforms the other two patterns.
Fine-Grained Access Control Model Based on RBAC
Authors: Gao Lei , Pan Shu Lin
Published: February 2012

Military information system has unusually tough restrictions on the rank, and attaches weight to the safety and secrecy of the information. This makes the higher demands on access control on information. So a new access control model based on RBAC is prompted against the limitation of the existing models of RBAC. This model is named as fine-grained access control model based on RBAC. This model not only assigns different roles to different users, but also adds an attribute of department ,so the role and the department are combined; It realizes fine-grained access control and refines to controls of pages, so this keeps access control more precise; Role tree is used to define roles and in order to prevent the problem brought up by role inheriting, it impose s restrictions on whether it can role inherit; At last, ACL store the especial instances’ alteration. When a control is accessed, it will examine the role and department and then judge whether it can role inherit and then judge by combing ACL. So this will attain access control objective. The fulfillment indicates that this model can meet the requirement of real application of military information management system.
Experimental Study of Influence Factors on Carbon Dioxide Corrosion
Authors: Wang Jin Gang , Gao Hao
Published: February 2012

CO2 corrosion is more prominent in the petrochemical industry, for different influencing factors of CO2 corrosion, 1Cr18Ni9Ti, 316L, TA2, Q235, 45 steel materials are selected for the study. Using immersion experiment and electrochemical experiment to study the corrosion behavior of these experimental materials in CO2 environment under different external conditions. We finally obtain the law of influence of the temperature, pH, concentration of chlorine ion and alloy elements on the CO2 corrosion.
Fault Detection of Continuous Casting Process Using Kernel PCA
Authors: Wang Xiao Yan
Published: February 2012

Viewing to monitoring the continuous casting process, a nonlinear fault detection method based on kernel principal component analysis (KPCA) was introduced. KPCA can efficiently compute principal components in high-dimensional feature spaces by means of integral operators and nonlinear kernel functions, which is to first map the input space into a feature space via nonlinear mapping and then to compute the principal components in that feature space. Based on T2 and SPE charts in feature space, principal component analysis(PCA)can be used to detect faults.. The simulation results show that the proposed approach effectively captured the nonlinear relationship in the process variables and showed superior process monitoring performance compared to linear PCA.
Evaluation of Zinc Contamination in the Sediments of Canon River Mouth, Taiwan
Authors: Chen Chiu Wen , Chen Chih Feng , Dong Cheng Di
Published: February 2012

This study was conducted using the data collected at the mouth of Canon River to investigate and analyze zinc (Zn) contained in the sediments, and to evaluate the accumulation of Zn and the degree of its potential risk. The results show that samples collected at all monitoring stations near the mouth of Canon River contain 358–3,365 mg/kg of Zn with average of 1,878±1,015 mg/kg. The spatial distribution of Zn reveals that the Zn concentration is relatively high in the river mouth region, and gradually diminishes toward the harbor region. This indicates that upstream industrial and municipal wastewater discharges along the river bank are major sources of pollution. The enrichment factor (EF) and geo-accumulation index (Igeo) indicate that the sedimentation at Canon River mouth has the moderately severe to extremely severe degree accumulation and moderate to very strongly accumulation of Zn. However, the potential ecological risk index indicates that the sedimentation at Canon River mouth has the low to moderate ecological potential risk.
Family Culture, Institution Environment and Entrepreneurship Orientation: a Case Study from China
Authors: Zhu Jian An
Published: February 2012

The growth of Chinese economy originates from the progress of the private enterprises. The entrepreneurship orientation, such as innovativeness, pro-activeness and risk-taking, contributes to the performance, defined as a compound measure dimension of growth as well as financial achievement. The case of the Mao Lixiang implies that economies with stronger entrepreneurial cultures from his family’s business tradition, are more tolerant and understanding of business failure and do not perceive this as a barrier to entry, but as an opportunity to learn. The ambition to change the present situation urges him to have the adaptability to political institutions and the regulation of entry, and find the business opportunities as well. The business history of Mao exhibits the Chinese continuous spirit of entrepreneurship.
First-Principles Calculation of Carbides in Niobium Microalloyed Medium and High Carbon Steels
Authors: Wang Dong , Cao Jian Chun , Zhou Xiao Long , Zhao Dong Wei , Deng Lei
Published: February 2012

The binding energies, formation energies and DOS (density of state) of several carbides(Fe3C, Fe2C, Fe5C2, NbC) in Nb micro-alloyed steels are investigated using the first-principle pseudo potential plane-wave method. The results show that the structure type with the strongest alloying ability and the highest structure stability is NbC with fcc structure. After compared the DOS of these different structure types, the results show that the discrepancy in structural stability of carbides can be attributed to the difference in the bonding electron numbers at Feimi level. The less the valence electrons at Feimi level are, the better the structural stability of carbides. Therefore, the theory predicts that the existence form of Nb in medium and high carbon steels are the same as low carbon steels. Nb is still the effective alloying element in medium and high carbon steels.
Experimental Investigation of the Flow Field of Gas-Liquid Slug
Authors: Wang Guo You , Zhang Yin Dong
Published: February 2012

The oscillating motion occurring in an oscillating heat pipe (OHP) can enhance heat transfer. The fluid flow of liquid plugs trapped between the vapor bubbles play a key role in an OHP. Understanding the flow field of liquid plug moving in a capillary tube will provide an insight into the oscillating motion occurring in an OHP. An experimental setup of a liquid plug moving in a capillary tube was established to determine the flow field of a liquid plug using the microscale particle image velocimetry (µPIV) system. The motion of liquid plug was controlled by a computer-controlled system, which can produce a velocity ranging from 0.5 mm/s to 9 mm/s. The diameter of the capillary tube investigated herein is 1mm with a liquid plug length from 1.0 mm to 5.0 mm. The µPIV data clearly indicates the complex nature of liquid plug flow in a capillary tube trapped between two gas bubbles. Experimental results show that there exist circulations near the contact line. The circulation strength in a liquid plug depends on the liquid plug length and velocity of the liquid plug.
Genetic Algorithm for Material Cost Minimization of External Strengthening System with Fiber Reinforced Polymer
Authors: Rahman Md. Moshiur , Jumaat Mohd Zamin , Hosen Md. Akter
Published: February 2012

An optimization procedural method for designing fiber reinforced polymer (FRP) plate for strengthening reinforced concrete beam is presented. The optimization procedure is formulated to find the design variables leading to the minimum cost of structural strengthening system using CFRP plate with constraints imposed based on TR55 code provisions. Genetic algorithm based approach is utilized to solve the optimization task. The cost of FRP plate and epoxy adhesive is included in the formulation of the objective function. The ultimate limit states and the serviceability limit states are included in formulation of constraints. A numerical example is given to show the validity of the proposed optimization method.
Influence of Internal Cavitating Flow of the Nozzle on Spray Characteristics in a Diesel Engine
Authors: Liu Ju Yan , He Zhi Xia , Wang Qian , Jiang Zhao Chen , Tian Li Li
Published: February 2012

Fuel atomization and penetration are known to significantly affect the combustion and emission processes in diesel engines. In the fuel supply system of diesel engines, the internal cavitaing flow of the nozzle is one of the most important effects on fuel spray characteristics. So it is necessary to simulate fuel spray coupling with internal cavitaing flow of the nozzle. In order to analyze the influence of cavitaing flow in the nozzle hole on spray, a coupling spray simulation was carried out with the output data of cavitaing flow in nozzles using FIRE v2010. The results of this work show that the characteristics of cavitating flow in orifice have an effect on both macroscopic properties, such as spray tip penetration and spray symmetry, and microscopic properties, like Sauter Mean Diameter-SMD. Moreover, the spray characteristics from three different types of nozzle were simulated to study the effect of nozzle structure on internal cavitating flow and subsequent spray, which supplies the theoretical foundation for the optimization design of the injector.
Improving the Communication Performance in Multi-Agent Systems for Distributed Manufacturing Process Control
Authors: Yang Qiang , Yan Wen Jun
Published: February 2012

The distributed control of complex and dynamic manufacturing systems is a challenging task and the multi-agent system (MAS) becomes a suitable solution due to its flexibility in both distributing and integrating software functionalities across the controlled system. This paper investigates the potentials of improving agent message delivery by enhancing the underlying communication network with IP QoS mechanisms using service differentiation and early congestion avoidance techniques. The extensive simulation experiments demonstrated the effectiveness of our approach in providing small latency, small jitter and improved throughputs in ACL message delivery, whilst without deteriorating other data applications between distributed controllers.
The Design and Implementation of a Parallel Configurable Paseudorandom Sequence Generator
Authors: Yang Jun , Zhao Ga , Wang Xiao Jun , Shu Ping Ping , Yang Heng Fen
Published: February 2012

In this paper, we study the implements a data rate can be adjusted, m series can be equipped with pseudo-random series of sequence generator. This design in the basis of linear feedback shift register, through the linear feedback function to produce mould the longest m sequence. In order to carry on it, we use the hardware description language VHDL, take advantage of the FPGA reconfigurability and flexibility, using Quartus II 8.0 for the integrated wiring, and give the Model simulation waveforms. For the sake of verifying the feasibility of this design, we adapt it to the DE2 board, and with an oscilloscope and other equipment were tested.
Loss and Gain of the Public Participation in Kunshan Master Plan
Authors: Mo Wen Jing , Duan Fei
Published: February 2012

Many cities have taken public participation in practice in urban planning since The Town and Country Planning Act of 2008 specified. In order to understand the present situation, it is making analysis in detail by means of empirical research: in the first, investigating the procedures of the public participation in Kunshan master planning; in the second, evaluating the result of the public participation; in the end, summarizing the loss and gain of the public participation.
Low-Resolution Range Data Surface Matching for 3D Face Verification
Authors: Zhou Juan , Li Yong Ping
Published: February 2012

In this paper, we presented a novel approach for automatic 3D face verification by range data surface matching. The method consists of range data registration and comparison. There are three steps in registration procedure: the coarse step conducting the normalization by exploiting a priori knowledge of the human face and facial features to make faces have the similar attitude; the next step considering the existence of holes in the low-resolution range data will undermining the recognition results, we presented a novel approach for holes filling to improve the range data quality; and the fine step aligning the input data with the model in the database by the Delaunay-Iterative Closest Point (D-ICP) algorithm. During the face comparison, a Modified Hausdorff Distance (MHD) is employed as the similarity metrics. The experiments are carried out on a database with 30 individuals, and the best EER of 1.667% is achieved.
Integration of S-P Chart and OT for Cognition Diagnosis on Fundamental Mathematics
Authors: Che Chin Chun , Lin Yuan Horng , Yih Jeng Ming , Yu Yen Kuei
Published: February 2012

The purpose of this study was to cooperate student-problem chart (S-P Chart) and ordering theory (OT) as an integrated method of cognition diagnosis. S-P chart was used to classify students into proper learning styles, In order to use OT to determine existing hierarchies among items with specifically learning style. Furthermore, an empirical data of capacity concepts testing for fundamental mathematics learning was analyzed based on the integrated method. The results showed that cognition diagnosis would be feasible for remedial teaching and design of teaching materials.
Micro Flow Sensor Based on Frequency Measurement of Micro Whistles
Authors: Di Yan Bin , Miao Ying
Published: February 2012

In this work, several millimeter sized micro whistles have been tested as potential frequency analog gas flow sensors. The characteristic curves of the whistles were systematically investigated as a function of geometrical dimensions, the kind of gas applied, and temperature. Both a micro¬phone and a PVDF foil were employed to record the frequencies. The relation be¬tween oscillation frequency and volume flow rate only shows a weak function of fluid properties and temperature. At a given flow rate, the difference of argon and nitrogen is 120 Hz on average, which is corresponding to 1.4 %. For air flow at a given flow rate, frequency rises approximately 380 Hz (2.73 %) per 10 °C. This kind of micro whistle could be employed as gas flow sensor which is insensitive to fluid properties.
Impressions of Mobile Operators on College Students
Authors: Fang Ling , Yan Li
Published: February 2012

This paper mainly surveys the different groups of college students to investigate the different aspects of impressions mobile operators made on them. The questionnaire survey shows that students of different gender have significant differences in market impression and technology impression (P<.001); Students of different family residences have no different impressions in mobile operators; Students of different grades have significant differences in market impression, employee impression and total score (*P< .05); Students of different majors have significant differences in all impression dimensions except technology impression. And after multiple comparison analysis, the impressions of different professional students differ mainly between the liberal arts students and science and engineering students. Through this investigation, the study aims to improve the capability of mobile operators in making appropriate impression management when they are in the face of college students, the potential high-end users.
Microstructure of MoSi2 Coating with B Addition Prepared by Vacuum Cladding
Authors: Liu Xiang Qing , Guo Zhi Meng , Ma Can , Lin Tao
Published: February 2012

The high-temperature oxidation-resistant MoSi2 coating with B addition on Mo substrate was prepared by vacuum cladding. The structure and composition of the coating were investigated by SEM and EDS. The results indicate that good metallurgical bond between all coatings and substrate has been developed. Throughout cracks were avoided by the addition of B. Three multi-layer structures as MoSi2, Mo5SiB2, and Mo3Si were formed by diffusion from outside to inside. The thickness of Mo5SiB2 layer was reduced because of the decreased diffusion coefficient of silicon in MoSi2 with the addition of boron.
Multi-Loop Network Power Grid Monitor Based on the Embedded Operating System
Authors: Gong Mao Fa , Xu Xin Yuan , Liu Jian Ping , Ma Li Guo , Zhang Xu
Published: February 2012

The paper advances a multi-loop network power grid monitor based on S3C2410 microprocessor and ATT7022B power measuring chip. Combining the widespread network and low-cost but high performance developing ideology, the paper expands a new network power grid monitor design process. After ATT7022B processes voltage and current data acquisition, the processed data can be read and stored in the local storage unit by S3C2410; If Ethernet link with the local area network, the power parameters can be transmitted to the management computer by Socket pattern, also can be reviewed through the WEB browser, realizing fast automated meter reading and network control. The device, after a period of probation, operates well and featured for its stability, less error, low cost, etc, and has much considerable market value.
A Single-Frame Based Approach to Measure Traffic Queue Length
Authors: Li Qing Wu , Li Hao , Huo Guan Ying
Published: February 2012

A novel method for measurement of vehicle queue length is presented in this paper. Previous methods proposed by researchers for queue detection are based on video sequences. The method proposed here measures the queue length in signal-frame image acquired by a stationary camera, which avoids the effect of uncontrollable camera motions. Besides, considering the varying illumination, double-threshold method is used for image segmentation and flashlight is applied to the system for realizing the round-the-clock traffic status detect. The experiment results of queue length measure from images of real road scenes show the accuracy and reliability of the proposed method.
Survey of Remote Handing for Hot Cell Equipment
Authors: Sun Zhen Zhong , Chen Sheng Gui , Li Rong Yong , Chen Hai Bin , He Wei Feng
Published: February 2012

The intent of this survey is to provide general design and operating considerations for the safe and dependable operation of remotely operated hot cell equipment. Hot cell is an isolated shielded room that provides a controlled environment for containing highly radioactive and contaminated material and equipment. Operations within the hot cell are accomplished using master-slave manipulators and overhead crane or electro-mechanical manipulator systems.
Model of Closed-Loop Detection System for Capacitive MEMS Accelerometer and its IC Realization
Authors: Wang Bin , Zhang He Ming , Hu Hui Yong , Zhang Zheng Yuan , Xuan Rong Xi , Zhou Chun Yu , Wang Guan Yu , Zhang Yu Ming
Published: February 2012

A type of closed-loop system model for capacitive MEMS accelerometer, with simple working clock , is presented in this paper. After establishing the force-feedback model and disgussing the magnitude of the feedback voltage, the readout interface IC for closed-loop detection is designed and the layout area of the ciruit is only 1435×2543 um2. Post simulation results indicated that the circuit has large detection range, high accuracy and linearity, giving evidence for the validity of our model.
On Game Behavior of the Inventory Pledge Banks and the Logistical Enterprises
Authors: He Juan , Wang Jian , Sun Li
Published: February 2012

This paper introduces the mechanism design theory to establish Stacklberg Game Model in which with perfect information, logistical enterprises are leading decision makers, analyzing the game behavior of inventory financing with the method of backward induction. The results indicate that with perfect information, two-sided market of banks and logistical enterprises has more advantages than one-sided market of banks, and logistical enterprises are willing to improve their risk ratio to gain interest reduction from banks, which can lead to demand for financing.
Numerical Analysis of Radial Groove Gas-Lubricated Face Seals at Slow Speed Condition
Authors: Ma Fang Bo , Song Peng Yun , Gao Jie
Published: February 2012

An effective finite difference method (FDM) is adopted to calculate the pressure distribution of radial groove gas-lubricated face seals at slow speed condition. Some key parameters of seal performance, such as open force, gas film stiffness, and leakage rate are calculated. Effect of seal ring parameters on seal performance is also analyzed. Compared with the results of non-slip-flow condition, it is shown that the effect of slip flow should be considered when the gas seal is analyzed at slow speed
Supply Chain Partner Relationships Classification: an Empirical Study on LEG Model
Authors: Xu Ling Ling , Xiang Wen Jie , Zhao Hong , Li Jun Feng
Published: February 2012

Based on the relevant literature and research theory, this paper discusses supply chain partner relationship classification evaluation model. As an object of study, Chinese typical manufacturing enterprises were surveyed through the design questionnaire to understand the present situation of supply chain partner relationships among them. With using of cluster analysis, supply chain partner relationships are classified to explore the regulation and trend for Chinese manufacturing enterprises’ supply chain partnerships.
Optimal Design of a Non-Overload Centrifugal Pump
Authors: Hu Bo , Yuan Shou Qi , Lu Wei Gang , Yuan Jian Ping , Li Lei
Published: February 2012

Three experiment factors including outlet blade angle β2, b2 and impeller wrapping angle θ are selected for optimal design of a non-overload pump. Numerical simulation with CFD is employed to reduce the cost and shorten the design period. The time-averaged Navier-Stokes equations of 3D steady flow in the pump are calculated by CFD based on the SST k-ω turbulence model and standard wall function. The structured grids of different qualities are used in one scheme for comparison to confirm that the results are not influenced by the quality of mesh. The optimal scheme is obtained when β2, b2, θ are 20 degrees, 7mm, 170 degrees, respectively. Its pressure head is 89.75m achieving the pump efficiency of 57% at maximum. The performances of NCPs at other working conditions satisfy the requirement of heads and efficiencies from China National Standard. The shaft power reaches to 15kW at 1.5QR (35.5m3/h), showing that the non-overload performance is also significantly improved. The impeller is considered as the optimal scheme and produced for experiments. Experiment data prove that it is effective and reliable to improve a non-overload pump’s performance by maximum flow design method and non-overload pump design method. The results provide a reference for increasing the efficiencies and pressure heads of non-overload pumps at multiple operating conditions.
Optimal Design of Cobalt Crust Cutting Head Structure Parameter Based on Genetic Algorithm
Authors: Xia Yi Min , Zhang Zhen Hua , Shen Bin
Published: February 2012

With the aim of reducing the energy consumption in the cobalt crust crushing process, the spiral mining head energy consumption is taken as the objective function. And mining head diameter, cutting pick intercept, width of cutting edge and cutting pick installation angle are selected as the optimum design variables. The constraints of each parameter is given. Genetic algorithm is applied to optimize this model. The optimized results suggest that the energy consumption is reduced by 38.3%. And it also improves the performance and economic efficiency of the spiral mining head.
The Finite Element Analysis of Asphalt Pavement with Function Layer under Temperature-Load Action
Authors: Du Chuang , Li Yan Yan , Guo Rong , Ma Shi Bin
Published: February 2012

In order to study the performance of asphalt pavement with function layer under temperature-load coupling action, the thickness of surface layer, the module of surface layer and was analyzed to abtain their influence on the function layer stress using the finite element method. The results clearly indicated that it is very effective to prevent the reflection crack by increasing the thickness of asphalt surface layer and it is not obvious to reduce the reflection crack through enhancing the module of asphalt surface layer.
The Numerical Calculation on the Effective Area of Photonic Crystal Fiber Using FEM
Authors: Ren Hai Zhen , Guo Peng , Yang Lin Feng
Published: February 2012

The effective areas of triangular lattice photonic crystal fiber (PCF) are analyzed using the finite element method (FEM) both for single-rod and three-rod core PCF. While keeping the normalized wavelength constant, the effective areas of PCF increase with increasing wavelength, it also decrease with increasing ratio of hole diameter over the hole pitch. We also compared the effective area of single-rod core and three-rod core PCF. We find that the effective area of three-rod core PCF is larger than that of single-rod core PCF as the normalized wavelength is small.
A Novel Current Reference Calculation Method for Shunt Active Power Filter under Nonideal Mains Voltages
Authors: Liu Shou Ming , Shi Hong Wei , Zhang Qian , Hu Zhi Kun
Published: February 2012

In this paper, the impuissance of traditional ip-iq method in reactive power compensation applications under nonideal mains voltages is illustrated first, and then a novel current reference calculation method for Shunt Active Power Filter (SAPF) based on p-q transformation is proposed. By means of the proposed method, the positive sequence fundamental active current component of the load current can be isolated under distorted and/or unbalanced mains voltages, which makes SAPF be capable of harmonic cancellation and reactive power compensation at the same time under nonideal mains voltages. The effectiveness of the new proposed method is mathematically studied and verified by computer simulation under ideal and nonideal mains voltages.
Parallel Study of Integrated Test in Software Testing Process
Authors: Sun Yu Qiang , Yin A Ling , Wang Xiao Kang , Liu Qiao Ying
Published: February 2012

With the view of the phenomenon that different test modules have significant differences in the assembly test system, and there is some dependence between these modules, through the dependence theory of the parallel technology, there is the possibility of parallelization used in the integrated test system. In this paper, we analyses various control flows of each program or relation between the modules, and then gets all kinds of dependency between these modules, at the same time transforms the dependency into control flow graph, lastly gets the dependency of actual test cases. On this basis, according to the former implementation plan in parallel research, we can arrange parallel orders of modules the integrated test system, it can effectively improve the efficiency of software testing, and greatly saves the test time.
Preparation and Characterization of Macromeritic Tungsten Powder Reduced by Ammonium Paratungstate at Medium Temperature
Authors: Wang Rui Xin , Guo Zhi Meng , Hao Jun Jie , Luo Ji , Xin Yan Jun
Published: February 2012

The macromeritic tungsten powder was prepared by wet hydrogen reduction at medium temperature; the coarse powder of Ammonium paratungstate powder (APT) was used as raw material. It is obtained by evaporating and crystallizating adding alkalia metal salts in the solution of ammonium tungstate. The microstructure, phase composition and particle size of the macromeritic tungsten powder were investigated by SEM, XRD and test analysis sieves. The effects of kinds, contents of alkali metal salts and the temperature in the reduction were studied. The results revealed that ideal tungsten powder, with the good fluditity, spherical, integrate and well-distributed, could be obtained. The raw material is the solution of ammonium tungstate adding NaCl, Li2CO3 and KCl , the concentration of them are all 3g/L, and it is under the condition of 1000°C,180min in wet hydrogen atmosphere. The average particle size is 67μm, the maximum is 150μm, the biggest loose density is 13.41g/cm3, and the best powder flowability is 9s/50g.
Performance Comparison of Two Network Coding Modulation Scheme in Multiple Access Relay Cooperation
Authors: Su Shi Bin , Gao Yuan Yuan , Zhang Ya Jun , Yang Bao Feng , Zhang Ya Long
Published: February 2012

In this paper, two different modulation schemes are developed in multiple access relay cooperation with network coding. Performance analysis and simulation results show that there is one point where the two modulation schemes have the same system outage probability. This finding can be utilized to propose an adaptive modulation scheme.
Research on Operation Monitoring System of Regional Logistics System
Authors: Xu Jian , Liu Dan , Wen Xin
Published: February 2012

For the present situation of decision-making errors and poor regulation caused by lack of operational monitoring in current development of China’s regional logistics system, the operation monitoring system of regional logistics system was designed in the paper. It consisted of index system, evaluation method, diagnosis and early-warning. By analyzing the content of operation for regional logistics system, the boundary of monitoring was defined and an index system was constructed; the grey relational grading evaluation model was introduced in monitoring and evaluation; diagnosis and early-warning could be realized by means of improved radar chart. It is expected to provide theory and methodological tool for operation monitoring of regional logistics.
The Two-Wheeled Self-Balancing Mobile Robot Based on MEMS
Authors: Sun Hu , Li Yun Guo , Li Xin Biao , Cheng Pei
Published: February 2012

In this paper, the MIMU( MEMS Inertial Measurement Unit) was used to detect the attitude angle of the two-wheeled robot. By Kalman filter, the optimal estimation of attitude angle was gotten, and which was applied to the balance controlling. In this system, FPGA is chosen as processor, and the embedded kernel was built up based on SOPC. Furthermore, the software of multiple sensors fusion has been developed. The experiment indicates that the design of this robot system is reasonable, and the Kalman filter algorithm can improve the precision of controlling effectively.
Texture Segmentation of Jacquard Fabric Using Wavelet-Domain Markov Model
Authors: Zhang Yang , Tong You Cheng , Yao Jun Zhou
Published: February 2012

To improve the accuracy and efficiency of fabric design CAD, a wavelet-domain Markov model to image texture segmentation from a natural framework for intergrating both local and global information of jacquard fabric image behavior, together with contextual information.Firstly the Daubechies wavelet and tree-structure is selected, then the approach decomposes the low frequency part of the jacquard fabric image. Secondly within the theoretical framework of Markov random field, we construct the grey field distribution model and label field prior model with finite Gaussian mixture algorithm and multi-level logistic algorithm respectively. The experiments for almost 30 warp knitting jacquard fabric images show that this approach is a feasible way for jacquard fabric, and it supplies a theoretical platform for subsequent research.
The Impacts of CG Technology on Architectural Designs in Animated Films of the U.S.A.
Authors: Zhao Wei Jun , Wu Ying Ying
Published: February 2012

In the digital animated films of the U.S.A, the frontier technology is CG (Computer Graphics). This paper, based on the study of American CG animated films, analyzes the unique architectural designs in these films and further points out that CG has brought unprecedented impacts on the traditional animated films. Thus, the architectural designs have been changing in the animated films of the U.S.A..
Research of Low Temperature Si/Si Direct Bonding Wafers with Different Pretreatments
Authors: He Fu Lin , Teng Lin , Li Chuan
Published: February 2012

Pretreatment of silicon wafer surface is the key factor to successful Low Temperature Si/Si Direct Bonding(LTSDB). Different cleaning methods are taken as pretreatments and corresponding levels of hydrophilicity are achieved. The obtained result shows that the RCA1 cleaning can improve the hydrophilicity on a large scale, plasma can also increase it but the treating time must be controlled carefully. The experiment provide confidential message for the realization of LTSDB.
Research of Composite Material Properties Based on Waste Glass and Scrap Aluminum
Authors: Zhang Jin Zhou
Published: February 2012

Considered waste glass and scrap aluminum as raw materials, preparation of waste glass and scrap aluminum composite materials by using mechanical mixing method. Composite material properties were studied by experiments. With the increase of the glass particles, the composite tensile strength and hardness are improved, wear resistance is increased much more than the matrix, it provides useful help of the use of waste.
Research and Development of a New Laboratory Mill
Authors: Luo Zhong Ping , Yao Ya Lin
Published: February 2012

This paper studies a new mill, which is developed particularly for the laboratory scale, with respect to the problems of low efficiency and bad adaptability of mills commonly used in laboratories. The paper briefly introduces the machinery construction, working principle, performance characteristics and grinding test methods. The main shaft of the mill is driven to rotate by the motor drive variable-speed system (speed control system), it could be equipped with cylinders of different volumes, the working speed and grinding intensity are adjustable; running cycle time is automatically controlled and adjustable, which eliminate the adverse effects caused by manual control errors. The results show that this machine could change the dosage scale of test materials in a large range, facilitate the grinding materials tests of different ores and different scales, and greatly improve the test efficiency and equipment’s adaptability.
Quantitative Ultrasonic Evaluation of Surface-Breaking Crack Height Based on Neural Network
Authors: Ke Chang Bo , Xie Bao Zhong
Published: February 2012

A three-layer structured Back Propagation (BP) neural network has been proposed to automatically predict the height of surface-breaking crack, 28 group data including different K values of transducers and the beam path distances obtained directly from the tip echo experiment have been taken into consideration as the training samples. It is shown that the predictions of current network are in good consistence with the real crack heights, the robustness testing demonstrates that the current neural network has its feasible expansibility to be utilized in practical engineering applications.
The Method Based on the Reuse in Virtual Scene Modeling
Authors: Chen Man Qing , Qian Hui , Zhang Geng Yun
Published: February 2012

In this paper，it is analyzed the problem in building the complex virtual scene modeling. A model reuse method is proposed to construct the complex model. And to use the model reuse method achieves to build a complex building in a virtual scene.
Research on Abnormal Car-Following Behavior of Multi-Lane
Authors: Fang Sai Yin , Li Feng
Published: February 2012

Car-following is a radical traffic Car-following theory. Driving behavior and vehicles’ driving characteristic is very important in making intelligent traffic system. This paper investigates the headways of multi-lane, finds that there existed small headway in multi-lane highway in city Changchun, and its percentage can not be negligible, analyses several reasons of changing lanes in the car-following and the headway distributions with the abnormal behavior. Finally the theory small headway is generated by influence of traffic flow and the ratio of the left and right turning is concluded.
The Application Practice of Geography Information Technology in Popular Science Area
Authors: Chen Ying Dong , Wei Yong Jun , Zhang Jun Feng , Chen Rong Guo , Xie Jiong , Chen Zhen
Published: February 2012

In this paper, it mainly research on the application of geography information technology in the popular science educational fields. It applies the space-time attribute and the graph visualization technology into the popular science knowledge creation, establishes the space-time information model of the popular science knowledge, and combines with the digital earth technology to make information of popular science to be expressed and exhibited in the method of graphical visually. It improves the accessibility of the popular science knowledge, and realizes an new method to popular science knowledge.
Research of the Re-Manufacturing Model and Information System Design Based on Supply Chain Management
Authors: Zhang Wen Ying , Wang Xi Fu , Cui Qian
Published: February 2012

The process of remanufacture in supply chain management has already obtained some producers and managers' value, but actually has not obtained the corresponding attention and the research in the industrial engineering and the management science research area. At present, the market competition has not been a single competition among enterprises, it has gradually expanded to the entire supply chain or value chain. Therefore, from the point of view of supply chain management, this paper analyzed and compared the existing typical mode of production and organizational form in the field of re-manufacturing, Which concluded new features of mode of organization and management in re-manufacturing environment, and further combined with the problems existing in the field of re-manufacturing and the needs of the business to establish information system architecture, for the integrated information system in the remanufacture field to establish relevant technology base and advance some concrete measures to improve.
A Summary on Algorithm Research of Synchronous Generator Excitation Control
Authors: Yu Juan
Published: February 2012

To solve the problem that in excitation control system the parameters of proportional integral differential (PID) controller are difficult to be set, a summary on research results of current synchronous generator excitation control regulator parameters optimization. The article details the PSO algorithm of synchronous generator excitation control principles, and whose advantages and disadvantages. For the PSO algorithm converges slower early and late defects iteration, it introduces a new algorithm called adaptive chaotic particle swarm optimization (CAPSO), and using the chaotic tent mapping-based search methods to achieve improvements in partly-search, with a strong and robust search capabilities for the industry and scholars for reference.
A Two-Stage Optimization System for the Plastic Injection Molding with Multiple Performance Characteristics
Authors: Chen Wen Chin , Fu G.L. , Kurniawan Denni
Published: February 2012

This study proposes a two-stage optimization system to generate the optimal process parameter settings of multi-quality characteristics in the plastic injection molding (PIM) products. In the first stage, Taguchi orthogonal array was employ to arrange the experimental work and to calculate the S/N ratio to determine the initial process parameter settings. Then, S/N ratio predictor and S/N quality predictor was constructed by employed the back-propagation neural network (BPNN). In addition, S/N ratio predictor was along with simulated annealing (SA) used to search for the first optimal parameter combination in order to reduce the PIM process variance. In the second stage, BPNN quality predictor and particle swarm optimization (PSO) was intended to find the optimal parameter settings for the best quality specification. Results from the experimental work show that the proposed two-stage optimization system can create the best process parameter settings which not only meet the quality specification, but also effectively reduce cost.