bluuebunny/crossref_metadata_2025 huggingface dataset:
Analysis of Logistics Cost Control of Commercial Chain Enterprises
Authors: Liu Lei
Published: January 2012

Chain enterprises are one of te two big marks of "modern circulation revolution"; it plays a irreplaceable role in the economic development. Not only did the chain operation in flow initiate a new distribution channel, but also established a new mode of operation in logistics. This paper analyzes the existing problems in managing logistics cost of chain enterprises, and advocates concrete methods of the control on logistics cost.
Research on Logistics Distribution Allocation Dispatching System Based on GIS
Authors: Lin Hai Song , Zhang Bi Xi
Published: January 2012

From the practical point of view, the paper researches the optimal and dynamic distribution optimization scheduling model, and explores the dynamic scheduling strategies of optimal scheduling model and GIS. At the same time, it also gives the formal distribution definition of the distribution optimization scheduling model, studies the model algorithm and analyzes performance of algorithm by means of examples. Finally, the article also designs and implements a logistics distribution allocation dispatching prototype system according to business needs of logistics distribution companies.
Study and Development of the Document Management System Oriented Collaborative Design
Authors: Ding Jun Mei , Zhang Tian Rui , Yu Tian Biao , Wang Wan Shan
Published: January 2012

Collaborative design is a new method that grows up with the development of the computer technology, network technology, database technology and artificial intelligence technology in recent years. According to the practical requirements of the collaborative design, key points of architecture, version management and electronic countersignature of collaborative design is studied. Besides, based on the theoretical study, a prototype system of electronic document management oriented collaborative design is developed. The operated results of the system verify the correctness of theoretical research and technical feasibility.
An Empirical Study of Constructing Index System of Tour Guide’s Compensation and Motivation Effect
Authors: Yang Yan Jiao
Published: January 2012

The index system of tour guides’compensation isn’t reasonable and lack of motivating to tour guides now. The study aims to construct reasonable index system of tour guide’s compensation and analyse motivation effect of every index. According to the data from investigated 188 full-time tour guides, the index system of tour guides’compensation is constructed by using factor analysis firstly, then the motivation effect of indexes of tour guides’compensation is analysed by using multiple linear regression.The study found that reasonable index system of tour guides’compensation is composed of 5 first-grade indexes which include Variable Pay , Basic Pay etc. and 9 second-grade indexes which include Basic Pay, Allowance for Conducting Tour Group etc.. In 5 first-grade indexes, motivation coefficient of Variable Pay , Basic Pay, Legal Benefit and Insurance are 0.468,0.491,0.320. Additional Pay,Year-end Bonus are health factors.(Abstract)
Application of Least Squares Support Vector Regression Trained by Genetic Algorithm in Reliability Prediction of LAN/WLAN Integration Network
Authors: Wei Shao Feng , Zhang Ying
Published: January 2012

Least squares support vector regression trained by genetic algorithm is proposed to predict the reliability of LAN/WLAN integration network,and genetic algorithm is adopted to optimize the parameters of least squares support vector regression in the paper. The influencing factors of network reliability usually include the number of node,the number of link,time delay and reliability of link. The comparison results of the prediction values between LSSVR and RBFNN and the comparison results of the prediction error between LSSVR and RBFNN are given in the paper.It is indicated that LSSVR has more excellent prediction ability than RBFNN.
The Effect of Oil Quantity Supplied on Micro-Pitting Life for Rolling and Sliding Contact
Authors: Moon Suk Man , Lee Byung Wook , Kim Tae Wan , Cho Yong Joo
Published: January 2012

The influence of oil quantity supplied and contact bulk temperature on micro-pitting lifetime is estimated using two-roller contact machine. The failure criterion is set as 4% micro-pitting on contact surfaces, which is adopted from precedent researches. To quantify the failure rate of damaged surfaces of micro-pitting occurrence, DBR(Dark and Bright Ratio) technique was effectively implemented for observing not a sudden emergence of macro-pitting but the transition of micro-pitting growth. The change of damaged surface area was measured and calculated by the use of dark and bright ratio of test specimen pictures taken by optical microscope. The optimum oil quantity was determined to obtain the minimum oil quantity with no change in bulk temperature despite of increasing the inlet oil quantity. In conclusion, the influence of supplied oil quantity and contact bulk temperature considering film parameter on micro-pitting lifetime and the surface contact strength by the S-N curves of failure rate are quantitatively reported and expressed as empirical formulas.
Analysis of Time-to-Fatigue for Standing Jobs in Metal Stamping Industry
Authors: Isa Halim , Omar A.R. , Saman A. M. , Othman I. , Ali M. A.
Published: January 2012

In metal stamping industry, almost all jobs are practically to be performed in standing position. Standing in a long period of time can lead to muscle fatigue. The objective of this study was to determine time-to-fatigue in the erector spinae, tibialis anterior, and gastrocnemius muscles of twenty production workers in a metal stamping company. The muscles activity was concurrently measured using surface electromyography (sEMG) during beginning, mid, and end of working sessions. Results of study found that gastrocnemius muscle fatigued earlier during all working sessions. In addition, working at the end of working session showed earlier fatigue than the beginning and mid of work days. The study concluded that standing in a long period of time is a cause to muscle fatigue experienced by the production workers.
Study on Cluster Supply Chain Synergetic Management
Authors: Li Fang , Qiu Jun Ru
Published: January 2012

Corporation with others enterprises is very important for their development, especially for Small and Mid-sized Enterprises. This paper discussed management methods among Small and Mid-sized Enterprises with synergetic thinking, based on the state of these enterprises and cluster supply chain, which provided a theoretical support for the development of small and mid-sized enterprises in China. Synergetic management in the inner unit and outer unit of cluster supply chain is described. The key safeguards to development of cluster supply chain are summarized at the end of this paper.
Cost Reduction of Raw Materials in a Steel Factory with Implementation of Mix Problem (A Case Study)
Authors: Moheghi Hamid Reza , Mashhadi Moghadam Hamid , Motevali Sara
Published: January 2012

Material cost decrease is an important issue for industrial factories. Operations Research is considered as a proper means for this purpose. A steel production company as a case study is presented in this paper. The combination of raw material is important in steel production. In the company raw materials are mixed experimentally without attention to cost minimization. After considering the process of steel production, a mix model is determined as a proper model for lowering the cost of production in the company. At first, we study the mix problem. Then, we deal with the quantities of the model parameters as well as a mathematical modeling based on the proper constraints. Finally, the solution to the mathematical model is created by a software .The model solution shows that the proposed optimal solution leads to cost minimization significantly.
Control System Modeling for Automotive Brake Test-Bench Based on Discrete Closed-Loop and Phase-Locked Loop
Authors: Du Jia Xi , Shen Hong , Fu Su Fang , Ning Xin
Published: January 2012

According to the law of rigid body around fixed axis rotation, established the mathematical model of motor drive current and instantaneous rotational speed. From the ideal situation of the simulation, according to the same discrete interval of time equal to the same increment of spindle angular velocity conditions, established the discrete closed-loop control system model. In allusion to the disadvantage of calculating corresponding braking current by the instantaneous speed and the instantaneous braking torque measured during the last interval, proposed the control method of calculating braking current by the instantaneous speed and the instantaneous braking torque measured all discrete intervals before current time. Discussed emphatically the computer controlled method based on the discrete closed-loop and phase-locked loop theory which can be used to design the braking current. Evaluated the advantages and disadvantages of the model, and proposed the improved direction.
Effect of Gas Flow Rate on Degradation of 2,4-D with O3 and O3/H2O2
Authors: Chen Lan , Quan Yu Heng
Published: January 2012

The effect of gas flow rate on degradation of chlorinated phenoxy acetic acids herbicide 2,4-D(2,4-dichlorophenoxyacetic acid) in aqueous solution with O3 or O 3/H 2O2 process was investigated in a bubbling semi-batch reactor. The experiments were conducted to study the degradation rate constant, mass transfer condition, ozone consumption and formation of byproduct hydrogen peroxide at different gas flow rates. The results show that gas flow rate is a complicated parameter in the process. The contact time of gas and liquid phase varies with different gas flow rate, consequently ozone mass transfer condition changes with different gas flow rates. The production rate of ozone, amount of ozone in the end gas and ozone consumption during the degradation with ozonation and O 3/H2O2 process vary with different of gas flow rates. Hydrogen peroxide is a byproduct during the ozonation or O3/H2O2 process of 2,4-D. The production rate of hydrogen peroxide is also affected by the gas flow rate. In general gas flow rate has both positive and negative effect on the 2,4-D degradation.
Numerical Simulation of Influences of Process Parameters on the Spinning Moment and Quality of Double-Roller Clamping Spinning
Authors: Fan Shu Qin , Zhao Sheng Dun , Zhang Qi
Published: January 2012

In order to obtain the influences of process parameters on double-roller clamping spinning (DRCS) process, the finite element (FE) numerical simulation is performed. Firstly, on the basis of nonlinear FE analysis software ABAQUS/Explicit, the FE model for the DRCS process is established. Secondly, the reliability of the FE model is verified by the experiment results. Finally, using the verified FE model, influences of roller feed rate, initial wall thickness and contact length on the spinning moment, maximum wall thickness difference and flange difference of the DRCS process are studied. The results show that when roller feed rate increases, both the spinning moment and flange difference will increase, however, the maximum wall thickness difference will decrease. And the increase of initial wall thickness can cause all the spinning moment, the maximum wall thickness difference and the flange difference to increase. Furthermore, the increase of contact length can cause all the flange width, maximum wall thickness difference and spinning moment to increase, as well as the increase of the difference between the flange width and the contact length. In addition, it is concluded that the flange width has a maximum value for the definite blank. The results can provide the theoretical basis for determining the process parameters of DRCS.
Control Chaos of a Nonlinear Circuit System by Two Controllers
Authors: Shi Bai Zhan , Gou Xiang Feng , Chen Quan Lei
Published: January 2012

A third-order circuit system with nonlinear negative capacitance is studied. The dynamical equation and state equation of the system are established. By the phase portraits, the motions of the system are studied under the definite parameters. And by bifurcation diagram, the route from periodic motion to chaos is studied under the presented system parameters. Two controllers are constructed to control the chaos of a third-order circuit system with nonlinear negative capacitance. One controller is nonlinear and the other is linear. The phase plane portraits and bifurcation diagram of the controlled system are obtained. The effect of the nonlinear controller is better than the linear one. The threshold values of the control values of the two control method are obtained. The advantages of the two controlled methods are that the collect of the control signals are simple and can put on any time and the chaotic system can be asymptotically stabilized to equilibriums with small control. The orbits of the system can be controlled by these two methods according to our target.
Treatment of Car-Washing Wastewater by Electrocoagulation-Ultrasound Technique for Reuse
Authors: Chu Jin Yu , Li Yu Rong , Li Ning , Huang Wei Hong
Published: January 2012

To reduce the water consumption and pollution in car-washing, a combined technique, i.e., electrocoagulation coupled with ultrasound, was proposed to treat the car-washing water for reuse. The effects of parameters (such as current intensity (I), initial pH, electrode distance (d), treatment time (t), and so on) on the removal efficiency of COD and turbidity in the wastewater were studied. The results indicate that the removal efficiency of COD and turbidity is maximum (68.77% and 96.27%, respectively) when I=1.2 A, pH=6.0, d=1.5 cm, and t=20 min. The quality of treated wastewater could meet the COD and turbidity requirements in Water Quality Standard for Urban Water Consumption. Meanwhile, the character of the reaction cell was studied, and it shows that the cell voltage is a linear function of the electrode distance when the current is constant. Compared with the removal rate of pollutants from car-washing wastewater by the single electrocoagulation method, a higher rate could be achieved by this combined technique.
Application of an Improved Fuzzy Reasoning Petri Nets Algorithm in IDS
Authors: Yang Li Ping
Published: January 2012

Petri net is a good tool to express production rules. To address the problem that needs to decrease false alarm rate in Intrusion Detection System (IDS), an improved fuzzy Petri net reasoning algorithm with weight factor was presented and be applied in IDS. The algorithm takes into account weight of proposition in rules and improves accuracy of detection. The reasoning process was completed with matrix computation manner based on MYCIN confidence method. It has parallel reasoning ability and improved speed of reasoning. An example illustrated correctness and rationality of improved algorithm in IDS.
Research on Distribution of Zeros and Poles for Plant Family with Parametric Uncertainty
Authors: Zheng Ze Wei
Published: January 2012

This paper considers the distribution of zeros and poles of plant family with parametric uncertainty. The relationship between the coefficients and the roots of a polynomial is also discussed. The computation of the distributions of spherical plant family is illustrated in this paper.
Bit Run Optimization through Simulation: A Case Study
Authors: Novieri E. , Torfi S.
Published: January 2012

The usual objective when drilling a well is to drill for the lowest overall cost. At first sight, this may seem like a requirement to drill as fast as possible, since many of the costs, such as the rig day rate, wages etc., are time dependent. However, some costs are fixed, for example the cost of the bit, and it may not always be economic to pay a very high cost for a bit that drills somewhat faster, particularly if the other costs are low.In this paper, some first 3465 feet of a reservoir lithology including four bit runs are analyzed so that factors affecting penetration rate are optimized and the lowest possible well cost is achieved. The effects of using other bit types, WOB, RPM and bit hydraulics are simulated in an attempt to determine the optimized parameters, which result in the lowest drilling cost. In this study, reducing both nozzle sizes and mud flow rate, the horse power dissipated at the bit is increased, hence reducing cost per foot of drilled interval. As it is noted, by using this simulator, 17% of the original well cost is saved, which is a considerable amount of money.
Economic Analysis of Two Microgrid Prototypes
Authors: Fang Lue Bin , Cai Jin Ding , Lin Han , James Geoffrey
Published: January 2012

A microgrid is an excellent supplement for both urban and rural utility grids. It assists in the integration of different kinds of renewable and distributed generation and it has the potential to make the distribution system more flexible and reliable. A microgrid is a combination of two or several energy resources like natural gas, wind, photovoltaic, biomass or diesel generators. Different energy resources together with battery storage system can complement one another to provide a more continuous power output. Two microgrid prototypes are discussed and, optional configurations are estimated using the economic analysis tool HOMER. Economic benefits and greenhouse-gas emissions of microgrids are calculated and compared. Results show that microgrids with optimal sizing and operation can achieve both cost efficiency and lower emissions.
An Integrated Model for Wind Power Forecasting Based On Maximum Entropy Principle
Authors: He Dian , Wu Jun Yong , Ji Lu Yu , Zhang Xi Lu , Li Xue
Published: January 2012

Wind speed forecasting is important to both wind plant and electrical system’s operation. Improving the prediction accuracy can not only effectively eliminate the disadvantageous impact to the power system but also enhance the wind’s permeability and competitiveness against the other kinds of power in electricity market. The random and intermittent wind directly causes the same characteristics of the wind power. The maximum entropy principle information principle was introduced to construct an integrated forecasting model. In this model, all individual forecasting models’ results and historical forecasting error were regarded as constraints. The forecasting values were educed by the integrated model based on the maximum entropy principle. Application result in a real wind plant showed that the integrated model had a higher forecasting accuracy compared with individual models and combined models.
A Novel Image Denoising Method Based on Adaptive Median Filter Algorithm
Authors: Xie Kai , Zhang Fen , Zhou Ying
Published: January 2012

Image denoising is a very important part in image pre-processing. Due to the problem, which the edge details in the denoised image easily lost with the increase of the template-window size, the image blurring is increased. This paper presents comprehensive analysis on the advantages and disadvantages of existing algorithms and proposes a new algorithm which is called as adaptive median filter algorithm. This algorithm combines the selected mask filter algorithm and median filtering algorithm together. Experimental results show that the algorithm can speed up and the image blurring can be reduced. It also gets a satisfactory effect on the high-density noise image.
The Simulation Study for Auto Electrical Seat Controller Based on Fuzzy Control Technology
Authors: Zhang Lan Jiang , Wang Gui Jie
Published: January 2012

Designed the control system policy for automobile electric seat using fuzzy control technology, therefore established its control model by Fuzzy Logic Toolbox, and carried on the off-line simulation to choose controller's optimum control parameters. From the dynamic viewpoint, the auto electric seat adjustment system is not only a complex nonlinear function which includes the location of the DC servo motor and the speed, but also contains serious nonlinear coupling interference, so the system is a highly nonlinear strong coupling, variable multivariable system. Application of traditional control methods (such as traditional PID) is difficult to meet its order requirements, so the research is highly robust method of intelligent control is an effective way to solve the problem. Fuzzy control technology has become the field in which drawn greater attention and researched in recent years. It doesn’t depend on the mathematical model of controlled object, has a good robustness, and nonlinear control characteristics, so it is an effective means to control the object with time-varying, non- linear parameters. In this paper, fuzzy control technology to achieve the orders of auto electric seat adjustment control system functions in the Literature [1], and the tracking of the system was simulated.
Study of Wireless Torque Measurement System Based on CC2500
Authors: Liu Wei , Song Xiao Jie , Chen Wen Gang
Published: January 2012

It’s very difficult to get high precision measuring result using contact torquemeter because of very low signal-to-noise ratio. To overcome this defect, a wireless torque measuring system is designed based on CC2500. This system uses strain gauge torque sensor to measure the surface principal stress of the transmission shaft, and get the maximum shearing stress, and then the torque that the transmission shaft bears. The weak output signal of torque sensor is magnified by the instrumentation amplifier AD623, and sent to the analog-to-digital convertor. These digital data are transmited to the portable receiving terminal by the wireless transceiver chip CC2500. The dynamic wireless torque measurement is realized by this system.
Soot Mass Flow Measurement System Using Triboelectricity and Ultrasonic
Authors: Zhao Yan Jun , Zhao Xuan , Yue Shu Sheng
Published: January 2012

A new method, triboelectricity and ultrasonic, for the soot mass flow measurement is developed. The direct rod-shaped sensor is used to measuring the triboelectricity charge and the ring sensor is used to measuring the electrostatic induction charge. The pure-triboelectricity can be figured out and the pure-triboelectricity is eliminated the influence of the electrostatic induction. Through the numerical simulation, the proportion between the electrostatic induction charge and the electrostatic induction charge is presented. The gas flowrate is measured by the ultrasonic. The soot mass flow can be figured out through the pure-triboelectricity and the gas velocity. Additionally, the sample calibration equipment based on the pure-triboelectricity and ultrasonic method is also introduced. Experimental results show the method can on-line measure the soot mass flow.
ITS Applications-Oriented ARGIS Technology
Authors: Geng Jia Zhou , Cheng Peng , Zhang Fei Zhou
Published: January 2012

The combination with Geographical Information System (GIS) and Augment Reality (AR) technologies would become Augment Reality Geographical Information System (ARGIS). ARGIS is applied to urban transportation navigation and orientation so as to promote the development of outdoor AR systems, and also would break a new application field for GIS. In this essay, on the basis of introducing actuality, importance, basic constitution and application background of ARGIS, we emphasize on the application range, and method of application of ARGIS to urban transportation navigation and direction put forward the concept, the and the research framework for Augment Reality Geographical Information System (ARGIS).
UWB Positioning Performance Tests Based on Chan Algorithm in IEEE 802.15.4a Channel Model
Authors: Mu Xiao Long , Cui Xue Rong , Zhang Hao , Gulliver T. Aaron
Published: January 2012

Chan algorithm is a closed form solution to the non-recursive equation set. This algorithm needs only a small amount of calculations but has a high degree of precision on positioning. It is valuable for academic reference. Firstly, it obtains the preliminary solution by using WLS (Weighted Least Squares) twice. Then, it uses the preliminary solution to linearise the nonlinear equation and finally makes the estimation of the position. The channel model can provide the model of indoor office environment ranging from 2 GHz to 10 GHz. Through the UWB (Ultra WideBand) positioning system of the channel model, the LOS(line-of-sight) environment can be simulated and TOA(Time-Of-Arrival) data measured by distance can also be obtained by sampling. However, small LOS errors included in the TOA data may lead to big ones in the positioning of 3D(three-dimensional) space and the precision of positioning may be undermined, when the data are directly applied to the Chan algorithm which is based on the TOA. In order to solve this issue, the TOA data obtained can be processed with MA(Moving Average) algorithm and the precision can be improved.
The Simulation of Tow Ship Noise on Towed Linear Array
Authors: Hui Juan , Zhao An Bang , Sun Kun Ping , Wen Shao Juan , Hui Jun Ying
Published: January 2012

Based on the acoustical properties of the tow ship noise, this paper studies the effect of tow ship noise on the towed linear array sonar system by computer simulation. The tow ship noise which is fairly approximate to the truth tow ship noise is obtained by the typical mathematical mode simulation firstly. Then the near-filed characteristics of the tow ship noise are simulated by using a simplified channel model. Finally, this thesis studies the interference of tow ship noise through beam-forming. The simulation describes acoustic characteristics of the tow ship noise well, and also provides a good theoretical support for the other simulation systems designs.
New Distance Definitions of Fuzzy Numbers
Authors: Cai Li Juan , Cui Zhan Hua , Liu Hui Lin
Published: January 2012

In this paper, we propose new distance definitions of fuzzy numbers and analysis their properties. Then the paper draws on several important theorems using these new distance definitions of fuzzy numbers.
ABS Road Surface Fuzzy Discrimination Based on Normal and Exponential Distribution
Authors: Wang Tie , Wu Jing , Zhang Xin , Shang Jing
Published: January 2012

The methods of work this identification system is that distill wheel speed characteristics to standard signal then stored in the system. When the first anti-lock loop begin to input the initial velocity to identification model then extract theoretical value of the system and input the actual speed then calculate the similar with theoretical speed. The maximum similarity value is the identification when the pavement is true. After that every cycle identifies monitoring (again identify based on new data) that is establishing state observer. Though it is inaccurate due to various interference identifications or when the adhesion coefficient of pavement has changed ABS will determine quickly make the work more reasonable. Choose normal distribution and exponential distribution of statistical principles to identify the pavement and modify the identification model with gamma membership function. Tire model choose H.B.Pacejka model suitable for programming. It will use Gauss numerical integration and rational interpolation to increase the timeliness of identification. The method this paper described is suitable for the identification of low road.
Selective Facial Expression Recognition Using fastICA
Authors: Zhang Xiao Hua , Liu Zhi Fei , Guo Ya Jun , Zhao Li Qiang
Published: January 2012

This paper proposes a facial expression recognition approach based on the combination of fastICA method and neural network classifiers. First we get some special facial expression regions, including eyebrows, eyes and mouth, in which wavelet transform is done to reduce the dimension. Then the fastICA method is used to extract these three facial features. Finally, BP neural network classifier is adopted to recognize facial expression. Experimental on the JAFFE database results show that the method is effective for both dimension reduction and recognition performance in comparison with traditional PCA and ICA method. We have obtained recognition rates as high as 93.33% in categorizing the facial expressions neutral, anger, or sadness. The best average recognition rate achieves 90.48%.
Wind Farm Equivalent Modeling Based on Eigen Analysis
Authors: Geng Lin , Zhu Shou Zhen , Zheng Jing Hong , Wang Xiao Yu , Li Qun Ju , Wu Tao , Sun Yu , Li Shan Ying
Published: January 2012

The increasing size of wind power generation requires considering wind farm model in power system stability analysis. Nowadays, the most widely used wind turbine type is doubly-fed induction generator, which is concerned here. The wind farm detailed model including every individual DFIG is high-dimensional and costs a lot of computation time, thus wind farm equivalent model is required. This paper presents an eigen analysis based approach to settle wind farm equivalent modeling for power system simulation. Simulation results indicate the equivalent model has good accuracy, and can reflect wind farm features, which is proper for large-scale power system simulation.
Power System Subsynchronous Oscillations Electromagnetic and Electromechanical Transient Hybrid Real-Time Simulation Based on RTDS
Authors: Shi Lei , Xiao Xiang Ning
Published: January 2012

In this paper, power system electromagnetic and electromechanical transient hybrid real-time simulation technology is expounded in details, which has advantages of the electromagnetic transient simulation program and electromechanical ones. The more details needed to analyze the dynamic characteristics of power systems are provided by this hybrid simulation technology, and the scale of power system simulated is not limited in the hybrid simulation program. The hybrid simulation program is applied to analyze the power system subsynchronous oscillation problem occurred in a power plant with 4 turbine generators located in the northwestern China. According to the simulation results, it is clear that the stability of generators is threatened by the subsynchronous oscillations caused by capacitor series compensation in the transmission line connecting the power plant and the load center system. In meantime, the effectiveness of the countermeasure is validated simultaneously by the hybrid simulation results.
Study on the Characteristics of a Pneumatic Spring with Bellow
Authors: Zhong Yan Chun , Yang Qing Jun , Bao Gang
Published: January 2012

The performance of a single-chamber pneumatic spring and a dual-chamber pneumatic spring have much difference. Dynamical models of these two types pneumatic springs were built and the characteristics of them were analyzed in this paper. Based on the theory of engineering thermodynamic, gas state equations were established and the dynamical models were obtained. The results show that: the single-chamber pneumatic spring can be equivalent to three stiffness springs in parallel and the dual-chamber pneumatic spring can be equivalent to a stiffness spring and a damping in series, then connect with three stiffness springs in parallel. The stiffness and natural frequency are main influenced by chamber pressure, effective area, volume of the chamber, displacement. The stiffness increases with the chamber pressure increasing and decreases with the volume of the chamber increasing. Such an accurate model for the pneumatic springs would contribute to more effective design or control of vibration isolation systems.
USD Index Equilibrium Study Based on the BEER Model
Authors: Liu Lan Fen , Han Li Yan
Published: January 2012

This paper examines the long-run determinants of the USD index.. Borrowing the BEER model and using cointegration analysis, we find (1) The increase of the foreign exchange reserves, the GDP growth rate and the change of gold price can make the equilibrium USDX appreciation, but the increase of money supply can make the equilibrium USDX depreciation. (2) Although the “equilibrium” USDX tracks the trends in the real USDX quite well, the real USDX has been misaligned several times, while the subprime credit crisis and the following financial tsunami have accelerated its overestimate.
Analysis and Comparison between the Energy Efficiency of HT and Non-HT MAC in 802.11n
Authors: Ting Kuo Chang , Wang Hwang Cheng , Kuo Fang Chang , Tseng Chih Cheng , Ting Ping Ho
Published: January 2012

In order to be compatible with the legacy 802.11, there are two major MAC behaviors, High-throughput (HT) and non-high throughput (non-HT) in the 802.11n. In this paper, we analyze and compare the energy efficiencies of different MAC behaviors in 802.11n based on the Bianchi model and our previous works [6] to evaluate the performance of the different MAC behaviors regarding HT and non-HT. Studies show that owing to the large power consumption in HT, it is not suitable for limited power devices to carry WWW traffics by MIMO transmissions. However, if large file transmissions by FTP are considered, the energy efficiency in HT MAC can be very high due to the large aggregated frame size. It is especially true when the number of active stations is large. Our works can indicate the mobile devices with limited battery endurance to reduce the energy consumption by the decision to enable HT mode or not for the transmission of data frames based on the cross-layer integration.
A Microsoft Word Documents Carving Method Base on Interior Virtual Streams
Authors: Lin Wei , Xu Ming
Published: January 2012

Microsoft word is widely used for word processing and document production. So the loss of the Word file would be great damages for their owner. File carving can reconstruct files based on their content and their own structure rather than using the metadata of the file system. The existing methods do not work very well on carving fragmented Word files. This paper presents a Microsoft Word documents carving method based on interior virtual streams. Firstly, we locate the header section and control streams-SAT to construct the framework for a Word file; then find its fragment regions by utilizing the framework information, and use the sequential hypothesis testing on the data streams in the fragment region to detect the fragment point. Based on DFRWS data sets and real data set, experiments show our method can automatically carve continuous and fragmented Microsoft word file. Moreover, the comparative experiments demonstrate that the proposed method is better than others’ in accurateness and effectiveness.
Research on the Recursive Method for Real Time Variance Calculation
Authors: Liu Jing , Deng Yi Jun
Published: January 2012

In the area of manufacturing and industrial engineering, variance calculation is the basic method to monitor the performance of instrument. In this paper, the recursive formula of real-time variance calculation is been put forward. Then it is possible to calculate the variance at real time without save the historical data. Experiment results shows that the new method for calculate the variance can greatly improve the calculating efficiency with high precision.
Application Research of Personal Learning Curve in Staff Skill Testing
Authors: Du Yan Wei , Xu Xian Long
Published: January 2012

According to the characteristics of many varieties small batch production, the assembly workers with operating accurate, coordination and strong learning ability are needed in a manual assembly line. Some scientific operating skills test is used to evaluate staff in recruitment, working hours formulate and performance evaluation. The origins and definition of learning curve were introduced. The characteristics of operation skills were analyzed. The mirror painting instrument was used to test the learning ability of workers for new operation skills. Workers were asked to face the graphics within the mirror, and to depict the graphics using the testing pen. The mistake number and the operation time were recorded. Learning curves were drawn out. Everyone worker movement skills forming process was analyzed on the basis of the above data. The test process and analyze conclusion provide the scientific basis and the decision support for the enterprises.
The Image Process Technology in Fingerprint Identification
Authors: Chen Hai Yan , Hui Ling
Published: January 2012

Fingerprint identification technology is one of the biometric identification technologies that match and recognize the collected fingerprint image to determine the identity of the person. Fingerprint identification technology compared to other biometric identifications is more unique, practical and workable. Therefore, the fingerprint identification as the most popular, most convenient and most reliable authentication method, it has been widely used in many aspects of social life. This paper introduced the whole structure of the fingerprint identification system and the function of every part in fingerprint identification system, mainly introduced the part of fingerprint image pre-processing and implemented one of the algorithms for fingerprint image preprocessing with MATLAB. The result of the experiment shows that the algorithm for fingerprint image preprocessing that used in the paper meets the fingerprint image preprocessing requirements and it provides a basis for fingerprint characteristics extracting and fingerprint characteristics matching.
Chinese Dialect Identification Using SC-GMM
Authors: Gu Ming Liang , Zhang Biao
Published: January 2012

Gaussian mixture model (GMM) is a sort of effective identification method in Chinese dialects identification, estimating GMM parameters is always an important step in building a state-of-the-art speech processing system. One of the most widely used approaches is maximum- likelihood estimation, where parameters of class-specific distributions are estimated using Expectation Maximization algorithm(EM). Initial parameters have great influence on the convergence of EM algorithm, so how to initialize GMM parameters is a key problem. In this paper, we apply spectral clustering(SC) to initialize GMM parameters. Experimental results prove that using spectral clustering algorithm to initialize GMM parameters is superior to traditional K-Means method and identification system has a higher recognition rate.
Two-Person Zero-Sum Stochastic Differential Games for Discrete-Time Systems
Authors: Zhou Shao Wei
Published: January 2012

This paper discusses two-person zero-sum stochastic differential games for discrete-time systems. The controls for both players are allowed to appear in both the drift and diffusion of the state equation, the weighting matrices in payoff/cost functional are not assumed to be definite. A generalized difference Riccati equation is introduced and the relationship between solvability of the equation and the existence of the saddle point has been given. Furthermore, making use of upper and lower solutions to Riccati equation, we obtained some other results.
Application Study of Symbolism
Authors: Zheng Bin , Ji Li Xia
Published: January 2012

D.H. Lawrence was an outstanding novelist of Britain in the 20th century. While he inherited the essence of the realism, he also absorbed nutrition from modernism and made some great developments, one of which was symbolism. Lawrence applied it in many of his works skillfully, which gave the novels a taste of mystery and indicated the ending of the stories. His famous novel Sons and Lovers is naturally not an exception, in which the use of symbolism is a typical character. The writer made full use of this method. There are three kinds of symbols in this story: symbolic images implying the emotion of the characters, symbolic characters standing for different kinds of love of the hero and symbolic episodes expressing the characters’ inner thoughts. The novel has attracted so much attention partly due to the perfect application of symbolism.
Parallel Ant Colony Optimization Algorithm Based on Multiplicate Pheromon Declining
Authors: Zhang Yan , Wang Hao , Zhang Yong Hua , Chen Yun , Li Xu
Published: January 2012

To overcome the defect of the classical ant colony algorithm’s slow convergence speed, and its vulnerability to local optimization, the authors propose Parallel Ant Colony Optimization Algorithm Based on Multiplicate Pheromon Declining to solve Traveling Salesman Problem according to the characteristics of natural ant colony multi-group and pheromone updating features of ant colony algorithm, combined with OpenMP parallel programming idea. The new algorithm combines three different pheromone updating methods to make a new declining pheromone updating method. It effectively reduces the impact of pheromone on the non-optimal path in the ants parade loop to subsequent ants and improves the parade quality of subsequent ants. It makes full use of multi-core CPU's computing power and improves the efficiency significantly. The new algorithm is compared with ACO through experiments. The results show that the new algorithm has faster convergence rate and better ability of global optimization than ACO.
Research of Compression System of Video Image
Authors: Zhong Cong Jiu , Guan Zong An
Published: January 2012

The quantity of information of digital Video image is huge and it is too difficult to be storaged and transmitted. Compression is a indispensable instrumentality .The text introduces MPEG-4, coding structure and expression of MPEG-4. A compression system of video is designed based on MAP-CA. The system can accomplish two-route-MPEG-4-video compression at the same time. It supports the video image previewed realtime. The video image can be straight carried to the storage. The code stream compressed is also straight carried to the memory. The CPU needn’t do anything in the process. It may no busy resource of CPU if it makes the image carried to the storage by PCI interface. The system is specially the same with DV, Tele-digital supervision, Web video applying, etc .
Some Influencing Factors on Photocatalytic Activity of TiO2 Film Prepared Using Sol-Gel Method
Authors: Zhang Wen Jie , Li Qian , Liu Wen Bin
Published: January 2012

Subscript text TiO2 film was deposited on glass substrate by a sol-gel process. The influences of the SiO2 layer, distance between lamp and solution, and air flow rate were investigated. Methyl orange can be hardly degraded under UV light exposure alone. The adsorption rate of methyl orange on TiO2 film is negative after 25 min of stirring. Although distance between the lamp and the solution varies from 5.5 cm to 7.5 cm, the degradation rates decline slightly. There is nearly no influence of air flow rate on the entire degradation ability of the photocatalyst. SiO2 film coated on microscope glass slide has no photocatalytic activity under UV irradiation. In prior to deposit TiO2 film onto the surface of the glass substrate, a SiO2 thin layer is coated. The results indicate that the TiO2 film with SiO2 layer has much better photocatalytic activity that the film without SiO2 layer.
NXD-Based SCL File Management and Dynamic Implementation in IEDs
Authors: Wang Zhi Dong , Wang Gang , Yang Bo
Published: January 2012

In IEC61850 substation automation systems (SASs), substation configuration description language (SCL) is suggested to assure seamless information exchange among various intelligent electronic devices (IEDs) from different manufacturers in the form of unambiguous and standardized XML. In the paper, native XML database (NXD) is proposed to store and manage SCL files since NXD takes advantage over XML enabled database (XED) in maintaining information integrity that is the most important factor of SCL file management. And the detailed process of SCL file dynamic implementation in IEDs is demonstrated. According to information with different communication real-time requirements, configuration information from SCL files will be extracted in advance or only when the information is used. Finally, a testbed built by open source software Libxml2 under Linux system verifies the effectiveness of SCL file information extraction using Xpath.
A New Approximate Matching Algorithm and its Application in Internet Music Search by Humming
Authors: Dong Yun Feng , Qi Bei
Published: January 2012

This paper has proposed a new approximate matching algorithm—similarity matching, and use the characteristics of algorithm to establish a system of internet music search by humming. The author compared the similarity matching algorithm and dynamic time warping (DTW) algorithm, which is most commonly used to query by humming, by the system of internet music search by humming. On the two standard of the query hit ratio and query speed, we got the result that similarity matching algorithm's comprehensive efficiency is superior, is one of QBH (query by humming) algorithm, which is applicable to the large-scale music library such as internet music search.
Wireless Sensor Networks Data Transmission Based on Congestion by Cognized Routing Protocol
Authors: Jun Fan
Published: January 2012

In wireless sensor networks (WSNs), sensor nodes share wireless channels to communicate with each other. So, link congestion often occurs and induces data retransmission easily. To avoid these issues, data transmission efficiency would be greatly enhanced and the energy consumption of network would save a lot. Based on this idea, we have designed a transmission-effective congestion-cognized (TECC) routing protocol in the paper. Routings are selected probabilistically and real-timely, according to the out-bound nodes’ satisfactory degrees of forwarding. Also, time stamps are used to control nodes’ status, effectively reducing the occurrence probability of conflict and link congestion in networks. Simulation results show that, TECC routing protocol has good performances of low-latency and energy-consuming equilibrium, which could significantly improve energy utilization and data transmission efficiency of network.
Cross-Diamond Search Algorithm for Motion Estimation Based on Projection
Authors: Hao Wen Jing , Zhang Li Cai , Wang Yan Ni
Published: January 2012

According to the time and space distribution of the video sequence image motion vector and the fact that the horizontal component of the non-zero motion vector is often more than the vertical component, this paper presents a cross-diamond search algorithm for motion estimation based on projection from studying the pre-judgment zero motion vector, the starting point of search prediction, the movement type determinant, search strategy formulation and other aspects. The algorithm ensures the image quality basically unchanged. In this case, the search speed of the proposed algorithm speeds up 95-245 times than full search and 4-6 times than the fast motion estimation algorithm. The proposed algorithm has a strong real-time character and an easy hardware implementation.
PXI-Based High Performance Data Acquisition System for Fuel Injection System of Diesel Engine
Authors: Lei Yun Hong , Song Xiao Jie , Chen Wen Gang , Liu Wei
Published: January 2012

High-performance data acquisition system is designed on the foundation of studying the working principle of diesel engine fuel injection system and analyzing the characteristics of fuel injection pressure waveform. The fuel injection pressure waveform can be accurately captured by the data acquisition system which based on embedded pressure sensors and NI PXI-6143 multifunction data acquisition card, and then the fuel injection opening pressure and the maximum injection pressure can be calculated. Fuel supply advance angle can be obtained by comparing the injection pressure waveform and the top dead center signal. The signal to noise ratio of the data acquisition system is very high, and the operating parameters of fuel supply system can be calculated without software filter. The fuel injection opening pressure, maximum injection pressure and fuel supply advance angle were obtained in situ test on 6L20/27 diesel. The operating parameters all coincide with the technology data sheet given by the factory.