bluuebunny/crossref_metadata_2025 huggingface dataset:
Analysis of Flow Simulation Based on Particle Movement
Authors: Zhong Zhen Yu
Published: February 2011

It is proposed the method based on particle movement to simulate flow in this paper. The force on particles can be obtained from N-S equations, and the calculation error caused by particles’ simulation is discussed. Results show that the method is more effective through the example of flow field affected by the cube. The advantage of this method is to solve problems of multiphase flow and fluid-structure interaction.
An ICA Algorithm Based on Symmetric and Asymmetric Generalized Gaussian Model
Authors: Zhao Feng , Zhang Yun Jie , Cai Min
Published: February 2011

Maximum likelihood estimation is a very popular method to estimate the independent component analysis model because of good performance. Independent component analysis algorithm (the natural gradient method) based on this method is widely used in the field of blind signal separation. It potentially assumes that the source signal was symmetrical distribution, in fact in practical applications, source signals may be asymmetric. This article by distinguishing that the source signal is symmetrical or asymmetrical, proposes an improved natural gradient method based on symmetric generalized Gaussian model (People usually call generalized Gaussian model) and asymmetric generalized Gaussian model. The random mixed-signal simulation results show that the improved algorithm is better than the natural gradient separation method.
The Filter Technology of Switching Power Supply
Authors: He Hong , Bao Shuai , Li Hang , Zhang Da Jian , Hou Ming Feng
Published: February 2011

The basic principle of switching power supply EMI filter was described. The circuit principle of passive EMI filter and several topology circuit of active EMI filter were introduced. Active EMI filter with feedforward, active EMI filter without current detection sensors installed and active EMI filter for three-phase inverter motor were researched. The problem that following the frequency rising of switching power supply, the EMI noise pollution was becoming more and more serious than before was solved. These growing pollutions had resulted in widespread application of EMI filter technology and in the meantime higher requirements were raised to EMI filter technology.
Classification of Urban Traffic Network Model Based on Multi-Class Support Vector Machine
Authors: Gao Yan
Published: February 2011

For poor accuracy of detection of the urban traffic network classification, the Support Vector Machine (SVM)is applied to classification of traffic incidents.This paper presents a traffic pattern classification method based on multi-class support vector machine, and design the network structure of the detection system. Simulation results show that: compared to other algorithms, the network, which is valid for urban transportation classification, has the advantages of high detection rate and low false alarm rate for small samples.
An Automatic Calibration Method in the Crop Architecture 3D Scanner
Authors: Xu Sheng Yong , Li De Hua , Li Zhu , Wei Qing
Published: February 2011

Calibration is an essential work in three-dimensional scanning system. The operation of existing calibration is complex and tedious. In this paper, we design a DLT-based automatic method of calibration, in which the calibration reference points are detected automatically. Then we can figure out a series of calibration parameters from these points. The average value of all parameters is just the calibration parameters. The experimental results show that the method we proposed is not only guaranteeing the calibration precision but also simplifying the calibration operation comparing with the traditional manual calibration method.
Experimental Study on H∞ Control for United Brake of Electric Vehicle
Authors: Zhang Chuan Wei
Published: February 2011

This paper discusses different united brake control strategies of electric vehicle (EV), presents a novel H∞ robust united brake control strategy for EV. Research work is done under different conditions namely variable battery voltage and variable load rotational inertia, separately. A comparison between conventional PID control and H∞ robust control is done when they are applied to the above mentioned conditions. Under the united brake condition, the experimental results show that the braking distance is shortened by the united brake system in the emergent brake; the braking ability of the EV is improved. H∞ robust control has better performance than the traditional PID control both in steady-state tracking error and response speed.
Study on Multiobjective Programming Problem under Bifuzzy Environment
Authors: Zheng Ming Fa , Li Bing Jie , Kou Guang Xing
Published: February 2011

In this paper, based on bifuzzy theory, we have studied the multiobjective programming problem under bifuzzy environment, and presented the expected-value model which is a deterministic multiobjective problem. To the expected value model, the concepts of non-inferior solution are defined, and their relations are also discussed. According to practical decision-making process, a solution method, called the method of main objective function, has been studied, whose results can facilitate us to design algorithms to solve the bifuzzy multiobjective programming problem.
A Note on Endogenous Timing in Duopoly Games
Authors: Yang Xiao Hua , Chen Sheng Li
Published: February 2011

We provide a general analysis of duopoly game in endogenous timing. The Nash equilibrium outcomes are compared with Stackelberg equilibrium outcomes. The different sets of conditions are provided for yielding respectively simultaneous and sequential plays and these conditions only depend on the monotonicities of the reaction functions and the payoffs functions in rival strategic variables.
Evaluation of the Capacitances by Using High Frequency Roll-Off Fitting to the Second Order Approximation
Authors: Yang Hsin Chia , Wang Mu Chun
Published: February 2011

The characteristics and feasibility of the dielectric can be evaluated by the deposition of the dielectric in between two electrodes to form a capacitor. In metal-insulator-silicon (MIS) structure, 100 Å Ta2O5 films are deposited on 1000 Å doped poly silicon as a bottom electrode layer and 500 Å TiN metal on top of the dielectric film consecutively [1]. The measured capacitances of larger areas roll off at higher measuring frequency [2]. With the setting of an equivalent circuit, one successfully explains why the roll-off effect shows up. The deduced formulas give the common, reasonable, and convincing C1=1.1255×10-5 nF/mm2, which determines the equivalent dielectric (oxide) thickness 30.5Å.
Design and Characterization of Novel Millimeter-Wave MEMS CPW Transmission Lines
Authors: Huang Jian Ming , Zhou Y. L. , Guo H.
Published: February 2011

The design and development of novel microelectromechanical systems’ (MEMS) coplanar waveguide (CPW) transmission lines, using microshield and groove, are presented in the paper to operate between 5–60 GHz. The quasi-static capacitances of CPW are calculated using the conformal mapping technique to express the propagation properties, i.e., the characteristic impedance and effective permittivity. Simulation results have shown a considerable loss reduction to levels that compare favorably with the conventional CPW. These transmission lines can be widely used in the development of phase shifters, filters, and antennas, because of their advantages in loss reduction and improvement in the performance.
Development of Biodegradable Wood Fiber Foam Packaging Material
Authors: Li Chen , Xiao Sheng Ling , Lin Hong
Published: February 2011

. In daily life, expanded polystyrene foams (EPS) are widely used as packaging material and waste EPS has caused lots of environmental pollutions because it cannot be decomposed in nature. In this study, the machining process is developed of a reinforced foam packaging material by hot press molding, potato starch and birch fiber as the main raw materials. Analysis of the dosage of the birch fiber, starch adhesive and foaming agent and how do they affect the mechanical properties. Experiments show that material compressive strength is good and foam well-distributed, when the birch fiber content is 20%-25%, adhesive content is 30%-35%, and birch fiber amount is 10%-15%, the material has fine performance, and the cells are well distribute.
Robust Watermarking Algorithm Based on Bi-Dimensional Empirical Mode Decomposition
Authors: Deng Ming Hui , Yang Fang , Wang Run Tao
Published: February 2011

In this paper, we introduce a robust image watermarking method based on bi-dimensional empirical mode decomposition against geometric distortion. Based on the characteristics of the image theory and human visual system, the proposed method makes use of orthogonal properties of empirical mode decomposition to achieve the bi-dimensional empirical mode decomposition transform on the image. The image is decomposed into a series of IMFs and residue which contain the different frequency parts of the image. So the watermark is adaptively weighed to the different positions of the middle frequency IMF region. The method makes use of the multi-scale analysis characteristics of image bi-dimensional empirical mode decomposition theory and the person’s sense of vision and shows excellent advantage against shearing attack. The method could show the watermark clearly when half of the image has been cut. Experimental results show this method excellent robustness for image shearing. The watermark thus generated is invisible and performs well in StirMark test and is robust to geometrical attacks. Compared with other watermarking algorithms, this algorithm is more robust, especially against geometric distortion, while having excellent frequency properties.
The Research of Immunity Intrusion Detector Model Based on Vaccine Independent Mechanism
Authors: Hu Yu , Zheng Ling
Published: February 2011

This paper describes a model of immune intrusion detection in which an independent form is introduced in. Immune intrusion detection receives the vaccine signal to control the Vaccine Module in real-time signal processing. Vaccine extraction signal is that extract from one memory detector set with antibodies to mature vaccine set and vaccination signal is that vaccinated other mature detectors which need vaccination. The objective of this model is to share antibodies (detectors), establish communication links between different detectors increase the flexibility of detectors and improve the overall detection ability of detectors. Through the simulation by MATLBE, it proves this model has greater comprehensive detection performance.
Acylation of Anthocyanins from Black Rice and their Stability Properties
Authors: Lv Xiao Ling , Sun Hua Ling , Ji Zhe Yuan
Published: February 2011

Acylated anthocyanins synthesis with anthocyanins extract from black rice and Octenyl succinate anhydride(OSA) was performed in pure ethanol. Stability of acylated anthocyanins and the color change have been evaluated over pH (1.0–12.0), light (daylight) and temperature(to 98°C) conditions, showing higher stability than non-acylated anthocyanins. The Acylated anthocyanins extracts showed red coloured solutions up to pH 10. However, The extracts from anthocyanins were observed faded to yellow after pH values up to 7. The increased stability of anthocyanins together with change in solubility opens a new window of opportunities for use of these extracts in a variety of food applications.
Security Research of Online Transactions
Authors: Wei Xian Min
Published: February 2011

With the rapid development of Internet, online shopping is becoming a new way for shopping. However, the security of online shopping has been the focus by a lot of people worried. This article discusses the existing problems from the online shopping area and the integrity of the security of online transactions, and describes the corresponding solutions. Finally, an example of information encryption technology introduced in the simple online shopping application.
A Pilot Study on the Structure of Organizational Cultural Identification: Empirical Research in Chinese Context
Authors: Chen Chih Chung
Published: February 2011

The primary purpose of this research is to explore the structure of organizational cultural identification. Qualitative and quantitative methods were used to build and validate the factors framework of cultural identification in organizations. Through exploratory and confirmatory factor analysis, the four dimensions structure of organizational cultural identification was confirmed, and the Organizational Cultural Identification Scale (OCIS) was constructed.
Dimensional Analysis to Ozone Generation by Pulsed Streamer Discharge in Dry Air
Authors: Wei Lin Sheng , Hu Zhao Ji , Zhang Ya Fang
Published: February 2011

The generation of ozone is efficient by using short high-voltage combined with a dielectric layer placed adjacent to the outer electrode in dry air. Ozone concontration depend on the peak pulsed voltage, pulse repetition rate, gas flow rate, reactor length and so on. For ozone generation by pulsed streamer discharge in dry air, a mathematical model, which describes the relation between ozone concentration and these parameters that are of importance in its design, is developed according to dimensional analysis theory. The presence of nitrogen on ozone formation in dry air cannot only consume high energy electron but also form nitrogen oxides (NOx) in discharge plasma. Nitrogen oxides (NOx) play an important role in the process of ozone generation in air discharge, where the catalytic cycle for ozone destruction takes place. So the nitrogen influencing factor should be considered. Formula is derived for predicting the characteristics of the ozone generation, within the corona inception voltage to the gap breakdown voltage. The predicted results are shown to be in good agreement with experimental findings.
Comprehensive Evaluation of Water Resources Carrying Capacity in Jiansanjiang Branch Bureau
Authors: Lv Ping , Liu Dong , Zhao Fei Fei
Published: February 2011

Aiming at water security issues existed in water resources development and utilization, studied the water resources carrying capacities of fifteen farms in Jiansanjiang branch bureau in 2008. Used grey correlation analysis to establish evaluation indices system. Entropy theory was introduced into weight calculation. Synthesized evaluation results of traditional matter-element model, fuzzy comprehensive evaluation model and fuzzy matter-element model to grade water resources carrying capacities. The results show that water resources carrying capacities of Farm Shengli, Qindeli, Qianshao and Qianfeng are gradeⅠ; carrying capacities of Farm 859, Daxing, Qinglongshan, Qianjin, Honghe, Yalvhe and Nongjiang are gradeⅡ; carrying capacities of Farm Qixing, Chuangye, Hongwei and Erdaohe are gradeⅢ. The study achievements provide scientific evidences for water resources protection and sustainable utilization in Jiansanjiang branch bureau.
A Rough Margin Based Fuzzy Support Vector Machine
Authors: Li Kai , Lu Xiao Xia
Published: February 2011

By combining fuzzy support vector machine with rough set, we propose a rough margin based fuzzy support vector machine (RFSVM). It inherits the characteristic of the FSVM method and considers position of training samples of the rough margin in order to reduce overfitting due to noises or outliers. The new proposed algorithm finds the optimal separating hyperplane that maximizes the rough margin containing lower margin and upper margin. Meanwhile, the points lied on the lower margin have larger penalty than these in the boundary of the rough margin. Experiments on several benchmark datasets show that the RFSVM algorithm is effective and feasible compared with the existing support vector machines.
The Study of Event-Driven Clustering Routing Algorithm for WSN in the Coal Mine Goaf
Authors: Zhao Xiao Hu , Wang Zheng Dong , Wang Zhong Ling , Zhang Qian Qian
Published: February 2011

Monitoring coal goaf mainly is arrangement of the wireless sensor network node in goaf to monitor the change of gas concentration and environmental temperature. This paper presents a clustering routing algorithm based on event-driven. In conventional circumstances, we adopt an improved LEACH algorithm. In the case of an event occurs, the nodes within the event region form a sub-cluster automatically, electing a cluster head node in cluster center. Cluster head after fusion data, in the direction of the shortest distance with the sink node forms a series of dynamic clustering and transmits the data to the sink node. Through MATLAB simulation studies show that the improved LEACH prolongs network life cycle efficaciously, clustering routing algorithm based on event-driven will transmits the data to the sink node reliably and in real time.
A Novel Layered Error Resilient Method for SPIHT-Coded Images over Packet Networks
Authors: Sun Wen Zhu , Wang Hong Yu , Wang Jie
Published: February 2011

This paper presents a layered error resilient scheme for Set Partitioning in Hierarchical Trees (SPIHT) coding which incorporates the Multiple Description Coding (MDC) into the data partition. The major feature of this scheme is that the MDC is adopted in the process of packetizing the spatial orientation trees, so as to protect the important information bits according to different importance and channel state. The proposed scheme can allocate redundancy accurately and flexibly, by differentiating importance of bits through different bit planes. Experimental results show that the proposed method achieves good performance over packet erasure channels.
A New Kind of FRFT Analysis Method for Multi-Component LFM Signals
Authors: Guo Qiang , Li Ya Jun , Wang Chang Hong
Published: February 2011

To effectively detect and recognize multi-component Linear Frequency-Modulated (LFM) emitter signals, a multi-component LFM emitter signal analysis method based on the complex Independent Component Analysis(ICA) which was combined with the Fractional Fourier Transform(FRFT) was proposed. The idea which was adopted to this method was the time-domain separation and then time-frequency analysis, and in the low SNR cases, the problem which is generally plagued by noised of feature extraction of multi-component LFM signal based on FRFT is overcame. Compared to the traditional method of time-frequency analysis, the computer simulation results show that the proposed method for the multi-component LFM signal separation and feature extraction was better.
Quality Prediction Based on ANN in Tobacco Redrying Process
Authors: Chen Chang Hua , Li Jing Min , Yin Jian Kang , Zhang Fei , Yao Jin
Published: February 2011

To improve uniformity of quality in tobacco redrying process, an ANN-based method is proposed to predict the possible output of post-redrying. Firstly, this paper presents an intelligent process control model with ANN. And then, it describes the three-layers network and improves BP algorithm by using the method of variable learning rate, in which 10 process parameters were selected as inputs, the moisture and temperature of post-redrying as outputs, and one hidden with 25 neurons is designed. Finally, the ANN is trained to map the nonlinear relationship between inputs and outputs. With the analyses and comparisons, the result obtained shows that the prediction of possible output has higher accuracy by this improved ANN-based method. Such model designed can be suitable for quality improvement in the tobacco redrying process.
The Comparison and Analysis of DRCnet, CEInet and Macrochina Network
Authors: Yang Guang , Shi Shi
Published: February 2011

This paper compars and analyzes the differences inword information and statistical data of such databases as DRCnet, Macrochina and CEInet and so on, compares the performance of various databases retrieval systems. This papersummarizes the characteristics of these Chinese statistics databases so that each academic library may make choices according to its own demand and the complementarity to the other databases.
Research on Bi-Objective Scheduling of Dual-Resource Constrained Flexible Job Shop
Authors: Liu Xiao Xia , Liu Chun Bo , Tao Ze
Published: February 2011

A hybrid genetic algorithm based on Pareto was proposed and applied to the flexible job shop scheduling problem (FJSP) with bi-objective, and the bi-objective FJSP optimization model was built, where the make-span and the production cost were concerned. The algorithm embeds Pareto ranking strategy into Pareto competition method, and the niche technology and four kinds of crossover operations are used in order to promote solution diversity. Pareto filter saves the optimum individual occurring in the course of evolution, which avoids losing the optimum solutions. This hybrid genetic algorithm reasonably assigns the resources of machines and workers to jobs and achieves optimum on some performance. In this paper, the influence of the proportion of workers and machines on the scheduling result is researched on the basis of the hybrid genetic algorithm and the result is in accord with other researchers. In conclusion, the algorithm proposed in this paper is available and efficient.
Research on Principles and Processes of Electrochemical Finishing with Ultrahigh-Frequency Group Pulse
Authors: Yan Yong , Zhang Wei Min , Zhang Zhi Jing , Li Xian
Published: February 2011

On the foundation of the methods and mechanisms of electrochemical finishing with high-frequency group pulse we studied before, properties of the finishing process with ultrahigh-frequency group pulse were studied, effects of pulse effect on the finishing result were also researched. With the Ultrahigh-frequency group pulse power we designed, we designed a equipment with high precision and easy operation. After some single-factor experiments, we obtained the laws of how the main pulse influenced the result, from the Ra of 2Cr13 stainless steel surface.
The Forming Mechanism of a New Oil-Mineral Aggregate
Authors: Fu Yong
Published: February 2011

A new Oil-Mineral Aggregate with bentonite and calsium hydroxide and sawdust has been done. Through several dozens of experiments, the coagulation efficiency with bentonite and Ca(OH)2 and sawdust is 94.53%. The functions of bentonite are coagulation, adsorption and emulsification. Calsium hydroxide is a good coagulant-mate, and strengthen the coagulating function of bentonite. It can be used as the source of calcium ions, which can strongly adsorb on both bentonite and oil droplets, and is helpful for the coagulation between bentonite and oil droplets. Sawdust is also very important in the OMA, its fouctions are buoyant, bridge-made and adsorbant.
Design & Realization of CNC System for Short Electric Arc Machine
Authors: Zhou Jian Ping , Xu Yan , Liang Chu Hua , Zhou Bi Sheng
Published: February 2011

Short Electric Arc Machining (SEAM) tools were devised for cutting high hardness and strength conductive material. For solution of short electric arc mechanism research and the needs of numerical control melt application, it was necessary to develop a short electric arc CNC machining. The paper introduced the peculiarity and types of the numerical control system’s software and hardware in nowadays. According to the requirement of short electric arc machine an open CNC system was developed in this thesis.
A Research on Rural Land Transfer System
Authors: Zheng Yu Xian , Liu Shi Zhu , Xu Liu Juan
Published: February 2011

In the new period of development of agriculture in China, as an important production element, rural land transfer has been a trend in the market. We first investigate some villagers in Qingyuan County of Zhejiang Province and use the collected data for model construction and fitting by logistic regression. Then we analyze the factors that affect farmers’ demand of joining specialized cooperatives and give some suggestions.
Analysis of Take-Off Performances for a Double-Joint Hopping Leg
Authors: Hu Sheng Hai , Deng Kun Xiu , Fu Wei , Li Lin
Published: February 2011

The paper is focused on a double-joint hopping leg driven by motors. Using relative coordinates, its kinematics and dynamics between the system and components are established during the launching stage of jumping, and the take-off mechanism is analyzed. Based on mechanics of jump movement and joint trajectory planning method, the impact of the change of the system initial posture and joint trajectories upon the system take-off performances, such as energy efficiency, instantaneous velocity of the system center of mass (CoM), is discussed by using numerical simulation approach with drive constraints. For a hopping robot, good take-off performances can improve its motion ability, so the resulted conclusions here provides a useful and helpful reference for analyzing and designing a multi-joint hopping robot.
The Canonical TSVD Method for L-Generalized Solution of Linear Ill-Posed Equations
Authors: Liu Zhi
Published: February 2011

The Canonical TSVD method is a kind of robust regularization method. In this paper, we first applied the Canonical TSVD method to finding L-generalized solution. We discussed a discrete method and how to compute the approximate solution of the Canonical TSVD method, then we gave some numerical examples. Finally, we drew some conclusions.
Microstructure and Abrasive Wear Behaviour of HVOF Sprayed Carbide-Based Cermet Coatings
Authors: Wang Hong Tao , Ji Gang Chang , Chen Qing Yu , Du Xue Fei , Fu Wei
Published: February 2011

Thermally sprayed carbide-based cermet coatings are being widely used for a variety of wear resistance applications. These coatings deposited by high velocity oxy-fuel (HVOF) technique are known to provide improved wear performance. In the present study, WC-12Co and Cr3C2-25NiCr carbide-based cermet coatings are deposited by HVOF. The microstructure and abrasion wear resistance of these coatings are compared. The correlation between coating microstructure and the coating wear behavior was investigated. The results indicated that WC-12Co coating has higher microhardness and better abrasive wear resistance in comparison to Cr3C2-25NiCr coating. The two HVOF sprayed carbide-based coatings have different abrasive wear behaviour.
Effect of TiO2 Addition on the Microstructures and Mechanical Properties of γ-TiAl Intermetallics
Authors: Zhu Jian Feng , Yang Wen Wen , Wang Jiang Jing
Published: February 2011

Al2O3 Particulate reinforced TiAl based composites have been fabricated by hot press-assisted reaction synthesis (HPRS) method using Ti, Al and TiO2 as starting materials. Effect of the TiO2 addition on the microstructures and mechanical properties of the TiAl/Al2O3 composites were detailedly investigated by X-ray diffraction (XRD), scanning electron microscopy (SEM) and universal properties tests. The results show that the TiO2 addition has evident effect on phase composition and microstructure of the TiAl intermetallics, as a result, the mechanical properties of TiAl composites are improved. When the TiO2 content is 10.58 wt %, the flexural strength and fracture toughness reach the maximum values of 537.34 MPa and 9.38 MPa·m1/2, which are increased by 70% and 23%, respectively. The strengthening mechanism is also discussed.
Thermal Deformation in a Dry Gas Seal
Authors: Zhu Wei Bing , Deng Cheng Zhong , Wang He Shun
Published: February 2011

In order to know thoroughly the thermal deformation characteristics of the dry gas seal in the synthesis gas compressor, the physical model and the thermal equilibrium model of the seal pair are established on its structural and thermal analysis. Based on finite element analysis software ANSYS, separation method are applied to resolve and analyze the temperature field and thermal-structural coupling deformation of the seal pair. The analyzed results show that the temperature of the rotating ring decreases gradually from the end face to the back face, and decreases gradually from the inner radius to the outer radius. The maximum of the temperature gradient of the rotating ring locates at the outer radius of the end face.The deformation of the stationary ring is negative conicity, the deformation of the rotating ring is positive conicity, and the later is the major reason of seal failure. Because of the thermal deformation, the end faces will form a convergent wedge. The convergent wedge favors the formation of a gaseous film, but it will lead to a increase in leakage quantity.
Analysis the Bamboo Resources Distribution and its Processing Technology in Hunan Province
Authors: Zhang Zong Deng , Liu Wen Jin
Published: February 2011

Hunan with rich bamboo resources, bamboo products closely relate with the people's daily lives. According to field surveys and investigations relevant information, this paper introduce the interception process, de-oiling process, correction process, polishing process, bleaching and dyeing of the bamboo section and the "decomposition process" and "integration" process of bamboo strips, and also introduce the craft and decoration process of bamboo products in Hunan.
Applying ANFIS to Estimate Stream-Way Erosion
Authors: Ma Shih Wei , Kou Chang Huan , Chen Li
Published: February 2011

The particular geological conditions of Taiwan and the onset of global climate change, have increased the intensity of precipitation, leading to greater turbulence within river channels. The erosion of riverbeds is an on-going concern, as the movement of sediment is at an all-time high. This study employs adaptive-network-based fuzzy inference to analyze and predict the erosion of river channels, and compares the results with those obtained through traditional linear regression. The Houfeng Bridge section of the Ta-Chia River in Taiwan was adopted as a case study. We investigated flow rate, gradient change, the quantity of sediment, the number of typhoons and floods, and geological conditions, as major causal factors of erosion. Results indicate that under heavy turbulence, the potential for erosion is very high in the flow areas of both Houfeung Bridge and the Chenglung Revetment. Our results are consistent with the actual conditions at the site.
Research of a Ring-Type Linear Ultrasonic Motor
Authors: Liu Jun Kao , Chen Wei Shan , Xue Zhen Yu
Published: February 2011

A new ring-type linear ultrasonic motor is proposed in this study. In this new design, bending vibration traveling wave is generated in a long ring by two groups of PZT ceramics bonded on the inner sides of the linear beams. Elliptical trajectory motions can be formed at particles on the teeth, which can realize the linear driving by frictional force. The working principle of the proposed design is introduced. Two bending vibration modes that have a phase difference of 90deg on space are analyzed. The elliptical motion trajectory of node on the tooth gained by the transient analysis verifies the excitation of bending traveling wave. A prototype motor is fabricated and measured, and a maximum speed of 15mm/s is reached.
Study on Triaxial Environment Test Box of Rock in Depth with High Temperature and High Pressure
Authors: Wang Yong Yan , Wang Yan Chun
Published: February 2011

Exploiting resources in depth needs us knowing about properties of rock in depth. Triaxial environment test box with high temperature and high pressure is core device of equipment of testing properties of rock in depth. The main parameters are confirmed based on special environment of rock in 2000 meters depth in this article. Structural design and calculation of environment test box are completed according to engineering mechanics and machine design. By finite element structural analysis with Pro/E and ANSYS, we obtain contour of displacement and stress, results indicate that boot of bolt head takes place the maximum displacement and stress of upper cylinder body, and sharp angles of inside wall take place stress concentration. These will be theory references for design and manufacture of environment test box with high temperature and high pressure.
Optimal Design of Degradation Experiment Based on Monte Carlo Simulation
Authors: Su Chun , Zhang Heng
Published: February 2011

The optimal design of degradation experiments under the cost restraint is studied. The performance degradation process of products is defined with the degradation data distribution. Whether the total experiment cost exceeds the predetermined budget or not is set as the constraint condition, the objective is to minimize pth quantile variance of the degradation data, an optimal model for degradation experiment is established. A Monte Carlo simulation program is developed to obtain the optimal experiment scheme. An example of a metal crack degradation data is used to verify the efficiency of the method.
A Novel Anonymous P2P Resource Sharing System
Authors: Bo Jin , Zhao Ju Ping
Published: February 2011

Resource sharing is the dominant peer-to-peer (P2P) application on the Internet, allowing users to easily contribute, search and obtain content. A key weakness of most existing P2P systems is the lack of anonymity. In this paper, we present an anonymous p2p resource sharing system, and this system has three desirable features as follows. First, the proposed P2P system makes it impossible for third parties to identify the participants involved. Second, the proposed P2P system can guarantee that only the content receiver knows the content. Third, the proposed P2P system can allow the content publisher to plausibly deny that the content originated from him or her.
Simulation Research of High-Speed Projectile Penetrating Steel
Authors: Shi Yun Bo , Chai Peng Lan , Zhao Xing Juan , Qi Ming Si , Liu Jun
Published: February 2011

The prototype testing of penetration requires a large amount of manpower, material and financial resources. So computer simulation technoolgy is used to save the resource.The process of high-speed penetration is simulated based on nonlinear dynamic analysis software ANSYS/LS-DYNA, and especially the simulation process of ANSYS/LS-DYNA is stated. Firstly, the theoretical analysis of material model and state equation are completed in the process of simulation. And by using the post-processor LS-PREPOST of LS-DYNA, the effective stress curve and acceleration changing curve were obtained. Simulation results show that: JOHNSON_COOK material model is correct in solving the problem of high-speed penetration, and the stress of internal projectile is decreasing along the axial direction.
Kerosene Based Magnetic Fluid Used in Magnetic Fluid Inclination Sensor
Authors: Cui Hai Rong , Sun Ming Li , Wang Xue Feng
Published: February 2011

Kerosene based magnetic fluid which use kerosene as carrier liquid is characterized by better liquidity and higher magnetization which is qualified enough to use in magnetic fluid based inclination sensor. This paper provides several preparative parameters to control the physical property of kerosene based magnetic fluid during manufacture processing which use ferrous chloride and ferric chloride as forerunner reaction mass. The results show that the proper consistency of ferrous chloride and ferric chloride is 0.6mol/L. Secondly, the saturation magnetization of magnetic nano-particles is highest when the molar ratio between trivalent iron ion and bivalent iron ion is equal to 1.75. Thirdly, the proper reacted temperature is between 60~80°C and pH value should be controlled in a weak alkaline situation while six hours should be necessary for surfactant encapsulated enough around the magnetic nano-particles surface. At last, the saturation magnetization of kerosene based magnetic fluid increases with the increment of density and viscosity of magnetic fluid.
A Novel Design of a Digital and Automatic Winding Machine Control System
Authors: Wang Yan Xin , Zhao Chun Feng
Published: February 2011

We designed a twin flying winding machine control system based on PLC to improve its performance. The system uses PLC to receive control signals and drives executing machines, employs touch screen to provide a user-friendly interface, uses AC servo system to perform winding and rotor indexing localization, and uses automatic tension control system to enhance the capacity of winding tension control. The system is able to speed up the winding of enameled wire, improve the accuracy of winding localization and indexing, and enhance the winding quality and the interaction between human and machine. It has been proven that the winding machine is easy-to-use and reliable. The system is suitable for automatic assembly line production control and can be applied widely.
Research and Design on Universal Framework for Integration CAD / CAE System
Authors: Shen Yuan , Liu Dong Cai , Shen Ya Lin , Zhu Chan Gan
Published: February 2011

This paper, which studied the structure of CAD/ CAE system, has proposed a universal CAD / CAE integration framework. This system, with good compatibility and being convenient to be used, can be the basic platform for all CAD / CAE systems. This framework, with a unified structure of command processor, the message processing system, selection mechanism, can transform the development of CAD / CAE integrated system to that of functional command module. With the help of this framework, functional development no longer relies on framework. Therefore, the framework greatly enhances the efficiency of software system development.
Application of ISO9000 Theory and TSIP Method in Engineering Education
Authors: Yin Li Xin , Jing Yan , Li Guo Wen
Published: February 2011

Engineering education has been a worldwide hot topic currently. Reform of engineering education call for a new model of cultivating talents. To the aim of training students’ engineering awareness, engineering skills and engineering spirit, combination general education and professional education, reference ISO9000 standards and according to engineering practice established eight principles of engineering education. University or college should be a place which guide and encourage students to study independently, multi-disciplinary and interdisciplinary learning. Respect the differences of students and teach them in accordance with individual differences. Curriculum setting should reflect the essence of ISO9000 management theory. Teaching practice show that TSIP (Try-Study-Instruct-Practice) teaching model is an effective method in engineering education and good results have been achieved. ISO9000 management theory and the TSIP teaching methods are applied in engineering education, could construct a model maximum meet the international CDIO standard engineering education. The learning process is teacher guidance and student-centered, teacher-student bilateral exchanges, practicality and self-study ability. This paper put forth a new way and a new model inventively for engineering education.
Subjective Evaluation of Construction Machinery Cab’s Comfort Based on Fuzzy Set Theory
Authors: Wang Zhen Ya , Cong Xiao Yan , Wang Yan Dong
Published: February 2011

This paper applied Fuzzy set theory to the comfort evaluation of construction machinery cab. Fuzzy comprehensive evaluation model, evaluation indexes set and comment set are built up. A relatively objective conclusion to an excavator cab’s comfort is obtained by calculation. This study puts forward a strict accurate handling ways to solve fuzzy phenomena in subjective evaluation of construction machinery cab’s comfort.
Analysis on Effect of Heat Bridge to Heat Transfer of Refuge Chamber’s Shell
Authors: Fang Hai Feng , Ge Shi Rong , Song Ming
Published: February 2011

In order to improve the heat-insulating capability of the refuge chamber’s shell and reduce energy consumption of the cooling system, the horizontal cylindrical mobile refuge chamber for coal mine was taken as the research object. By selecting two connection types between the inner shell and the outer shell for calculation, which were direct connection type and indirect connection type, and comparing these with the connectionless heat transfer, the heat transfer process in the refuge chamber subjected to thermal loadings of constant temperature was respectively discussed with numerical analysis method. Effect of heat bridges to heat transfer of the refuge chamber’s shell was analyzed. The analysis results showed that the average heat flux through direct connection heat bridge and indirect connection heat bridge had respectively increased by 668% and 30% than that of the connectionless heat transfer. The influencing scope of the former was larger than the latter’s. And more heat entered the refuge chamber through the direct connection heat bridge. Therefore, the indirect connection type should be used in the design of the refuge chamber’s shell.
A New Control Strategy of Electric-Wheel Drive Vehicles
Authors: Li Zhuo , Ming Shou Zheng
Published: February 2011

The steering radius and the vehicle velocity is utilized to control the drive force and steering angle of each electric-wheel in this essay. In order to improve the characteristics of vehicle, a dynamic simulation was made with the predictions of constant velocity and radius to the vehicle model with the R-v control strategy. This simulation proves that the characteristics of vehicle steering will be better with the utilization of this control strategy.
Movement Control of Small Moving Robots for Large Curved Surfaces Polishing
Authors: Ye De Bin , Zhan Jian Ming , Wang Gang Ming
Published: February 2011

A small polishing robot must be made to adapt the change of curvature and slope of the cutting curved surfaces when it moves on the large curved surface. This paper develops a small moving robot to move on the large curved surface and polish it which can adapt the change of curvature and slope of the cutting curved surfaces. It also establishes the kinematics model and the inverse kinematics for movement control of the robot. By analyzing the motion characteristics and the processing of automatic polishing, the paper develops the posture equation of the robot. Experiments shows the small moving robot is capable of adaptability in polishing curved surfaces.
On the System of Multiple Linear Regression of Higher Education Tuition in China
Authors: Wang Wei , Liu De Quan , Liu Jian
Published: February 2011

Based on the fairness and benefits of the opportunity to accept higher education, tuition should be paid. The average cost of higher education and the ability to pay tuition which is determined by the average income are two fundamental basics for making the standard of tuition. In order to research the standard of tuition, the paper has focused on two issues: What is the acceptable range of tuition for higher education in China? How much is the reasonable tuition for higher education in China? Then we have established a multiple linear regression model on the basis of the reasonable assumption. Using the Eviews Software, we got that the range of average tuition was [4674.4, 7516.1]. Then we made a sensitivity analysis on the state funding and got the conclusion, tuition of colleges and universities all over our country were reasonable, and that the average tuition was negatively correlated to the state funding to some extent. Through the conclusion, we obtained that the state funding accounted for 25% in training costs of students. When the state funding rose by 250 yuan, the average tuition would decrease by 238 yuan.
An Improved Tiny OS Beaconing Routing Protocol for Wireless Sensor Network
Authors: Deng Wen Da
Published: February 2011

Tiny OS Beaconing routing protocol is widely used in Wireless Sensor Network (WSN), but it can easily cause the network to fail because some important nodes use up their energy too fast. The present paper suggests an improved Tiny OS Beaconing routing protocol by adding max sub-node, layer control and route maintaining so as to highly prolong the survival time of the WSN, and make the network more reliable.
Capacitive Sensor Design for an Automatic Car-Wiper System
Authors: Li Nan , He Cun Fu
Published: February 2011

A structure of capacitance sensor used for an automatic car-wiper system is presented. It aims to develop a low-cost sensor with high sensitivity and robustness. Firstly, two kinds of sensing technique based on optical and piezoelectric sensors for an automatic car-wiper system are introduced respectively. Then, three types of capacitance sensors of different shapes are designed. The parameters which affecting the sensor signal strength and measurement sensitivity are discussed. Thirdly, the electric field distributions of the sensors are simulated, and the fringe capacitance of the sensors are measured and analyzed. Finally, the optimum excitation frequency of designed sensor is determined, and the sensor noise is discussed in this paper. The experimental results indicate the validity and importance of the capacitance-based sensing technique which can be used for liquid detection on windshield of vehicles.
Research on the Knowledge Base System of Rolling Bearings
Authors: Jia Xian Zhao , Luo Tian Yu , Lv Feng , Liu Hong Bin
Published: February 2011

The representation method of rolling bearings knowledge and general structure of knowledge base system are put forward by researching on the knowledge characteristics of rolling bearings fields. A knowledge base system of rolling bearings that is propitious to the knowledge’s acquirement, abstraction, storage, share, application and innovation is built by combining with the technology of knowledge based engineering and expert system, which provides support for intelligent design of rolling bearings.
An Efficient and Provably Secure Proxy Signature Scheme
Authors: Zhang Jian Hong , Xu Min , Su Xiu Na
Published: February 2011

As a concept of delegating signing rights for digital signatures, proxy signature is a well studied subject in cryptography. Proxy signature is an important delegation technique. It plays an important role in auto-office system. In this paper, we give a secure and efficient proxy signature scheme. The security of the scheme is base on the fixed inversion problem of bilinear map. It has the following advantages: simple construction, short size and low computation.
Design of a Topology Nano-Positioning Stage
Authors: Chen Tao , Chen Li Guo , Pan Ming Qiang , Sun Li Ning
Published: February 2011

Nano-positioning technology has been widely used in many fields, such as microelectronics, optical engineering, and micro-technology equipment and manufacture. This paper presents a one-dimensional positioning system, adopting a PZT piezoelectric ceramic nano-positioning stage designed by multi-objective topological optimal synthesis. In order to obtain better performance, wedge-shaped structure has been applied as a precise pretension for the piezoelectric ceramic. Through finite element simulation and experimental verification, better static performance and smaller kinetic coupling are achieved, with up to 10 μm stroke displacement output and 5 nm resolution. This stage provides a novel, flexible, and efficient way in the design and optimization of the nano-positioning system.
Curve Fitting Approach of Saddle-Shaped Curve for Automated Welding/Cutting
Authors: Tian Xin Cheng , Deng Xiao Hong
Published: February 2011

Curve fitting, or interpolation algorithm is core technology for Computer Numerical Control (CNC) systems. A saddle-shaped curve is formed by intersection of two tubes. The trajectory interpolation of saddle-shaped curve is usually carried out through approximating the curve as segments of straight line for automated CNC welding/cutting. This paper proposes a new saddle curve curve fitting algorithm for automated welding/cutting system with non-Cartesian coordinate system. Simulation of the direct curve fitting algorithm has demonstrated that the algorithm has high curve interpolation precision and high feedrate stability.
Neural Network Adaptive Control for a Class of SISO Nonlinear Systems
Authors: Hu Hui , Guo Peng , Liu Cheng
Published: February 2011

An adaptive neural network control scheme is presented for a class of SISO affine nonlinear systems. Parameters in neural networks are updated using a gradient descent method. No robustifying control term is used in controller. The convergence of adaptive parameters and tracking error and the boundedness of all states in the corresponding closed-loop system are demonstrated by Lyapunov stability theorem. Simulation results demonstrate the effectiveness of the approach.