bluuebunny/crossref_metadata_2025 huggingface dataset:
Research on Fuzzy Clustering Validity
Authors: Chen Wei Jin , Dong Huai Lin , Wu Qing Feng , Lin Ling
Published: November 2010

The evaluation of clustering validity is important for clustering analysis, and is one of the hottest spots of cluster analysis. The quality of the evaluation of clustering is that optimal number of clusters is reasonable. For fuzzy clustering, the paper surveys the widely known fuzzy clustering validity evaluation based on the methods of fuzzy partition, geometry structure and statistics.
A Correctional Model for Multiperiod Optimization of Steam Power Systems with Consideration of Startup/Shutdown Expenses
Authors: Dai Wen Zhi , Yin Hong Chao
Published: November 2010

In order to meet varied requirements of gas and electricity in petrochemical enterprises, as well as reducing the operation cost and minimizing energy use, optimal operation of steam power systems is a must. Based on previous work, this research proposes a mixed integral non-linear planning model (MILNP), which accounts for expenses of operation, maintenance, depreciation, and changeover cost in between startup and shutdown stage. The model is validated against operative data. The results show optimal control strategy can be quickly obtained with improved PSO algorithm, accompanied with considerable cost saving.
Design and Realization of Passenger Vehicle Body CAN/LIN Network Based on AUTOSAR
Authors: Li Yan Qiang , Li Yang , Wang Zhi Xue
Published: November 2010

Chinese carmaker is short of the ability of designing CAN\LIN network, a method of designing the vehicle body CAN-BUS and LIN-BUS network is introduced based on the AUTOSAR standard. A typical topology is designed and three transmitting type of CAN message is defined. A design method of Network Management PDU Structure is given. At the end, the method is verified by CANoe software and physical simulation.
The Design of Fast Pulse Power Generator with Low Voltage
Authors: Hu Zhao Yu , Xu Jun , Luo Shen Du , Yang Mao Hui
Published: November 2010

In recent years, nanosecond pulse power techniques used in the millimeter-wave solid-state pulse power amplifiers attracted much attention. The rise- and fall-time of the pulse, the flatness of pulse-top and the stability of pulse-to-pulse, which have play important roles in a nanosecond pulse power generator techniques, and directly determine the system performance. In this paper, a method using the outbreak current with low-voltage to drive MOS-FETs is proposed. The measured results show that the rise- and fall-time of the output pulse is less than 1.5 ns with a pure resistance 0.5Ω, and it only needs two 12V power supply to give a output current of 20A with a pulse width of 160 ns at a repetition rate of 540 kHz in continuous mode. A flatness of 3% for the output voltage was obtained,which meet the requirements of ka-band solid-state millimeter-wave pulse power amplifier.
Research and Implementation of a Communication Method for Health Status Monitoring in Civil Engineering
Authors: Li Gang , Shi Feng
Published: November 2010

A front end frequency measuring system with a CPLD and an embedded system as the core circuit is designed to achieve the automated connection and measurement of multiple sensors. Then, according to practical project condition, a data transmission scheme with the integration of wireless and wired communications as well as the combination of a private network and a public network is selected. Data transmission from measuring nodes on the top of the shaft to the bottom is completed by wireless data transmission modules, data transmission from measuring nodes at the bottom of the shaft to relay nodes in the main tunnel is completed through a RS485 bus, and data transmission from relay nodes in the main tunnel to the office is completed through the GSM network, thus the remote health status monitoring of civil engineering projects is achieved.
ABCR-STC: An Improved Adaptive Backoff Algorithm for MAC Protocol in Ad Hoc Networks
Authors: Chen Xiao Yun , Liu Sha , Li Long Jie
Published: November 2010

The performance of backoff algorithm plays an important role in designing efficient Medium Access Protocols for Ad hoc networks. In this paper, we propose three backoff algorithms for Ad hoc networks. The first algorithm aims at higher fairness, and the second aims at stronger adaptivity. Then, we combine the first two algorithms to propose an optimized backoff algorithm. We use NS2 to simulate Ad hoc network environment to evaluate the performance of our improved backoff algorithms. The results show that our algorithms exhibit a signiﬁcant improvement in throughput and fairness with the existing BEB and AASC algorithm.
Feature Extraction from Noisy Image Using Intersecting Cortical Model
Authors: Wang Xiao Fei , Li Bo Nian , Huang Yan Li , Wang Xin Ran
Published: November 2010

This paper introduces an efficient approach for feature extraction from noisy image using Intersecting Cortical Model(ICM), which is a simplified model of Pulse-Coupled Neural Network(PCNN). In our research, the entropy sequence of the output image, is obtained from the original gray image by ICM, as feature vector of the gray image, which can be used to represent the gray image, and this has been proved by our experiments. Consequently, it is used in the image classification, and the mean square error (MSE) between the feature vector of the input image and the standard feature vector is used to judge to which image groups the input image belongs. It has been proved that the method is not sensitivity with the Gaussian noise, salt and pepper noise or both of this and greatly robust for image recognition.
Application of DNC Communication System Based on Network Manufacturing Technology
Authors: Chen Jing
Published: November 2010

DNC is referred to as the Direct Numerical Control, Intended for direct digital control. It means a number of numerical control equipment directly connected to a computer, and the central computer in charge of the NC program’s management and transfer. At present, DNC system includes not only the NC program, but also the manufacturing data of the specific tasks required for the production, such as cutting tools data, scheduling, configuration information of machine tools, and so on, and part of the DNC system also has the functions of machine tool state acquisition and remote control.
Influence of Variety of Oil Temperature on Performance of Hydro-Pneumatic Suspension
Authors: Yang Jue , Zhao Jun Feng , Shen Yan Hua , Duan Chen Yue
Published: November 2010

A test platform based on hydro-pneumatic suspension was set up to research the influence of temperature for the hydro-pneumatic suspension system. A series of experiments on damping holes of different diameters were carried out, and the temperature of oil and pressure on both sides of damping holes were recorded. A mathematical model of this platform was established using knowledge of fluid mechanics. The result of mathematical model was verified by experiments result, and the result is that oil temperature has little influence to working condition of suspension cylinder when it is between room temperature and 75°C.
Study on Control Algorithm of 3-DOF Parallel Robot
Authors: Cao Qing Hua , Fan Li
Published: November 2010

In order to improve control affect of 3-DOF parallel robot, the structure and work principle are presented in brief, control algorithm is introduced in great detail, three controller, which are PID controller , fuzzy logic control and robust control,are established, research of compare experiment show that robust control in hydraulic servo system is better than the other control algorithms.
Optimization Model and Algorithm in Microbial Continuous Fermentation Process
Authors: Yu Yong Sheng , Liu Chong Yang
Published: November 2010

In this paper, a nonlinear dynamical system is proposed to describe glycerol bioconversion to 1,3-propanediol (1,3-PD) in continuous fermentation process. Some important properties of the system are then discussed. To maximize the concentration of 1,3-PD at the steady-state moment, an optimization model by taking the concentration of glycerol in the feed flow and the dilution rate as optimization variables is presented. Finally, an improved Particle Swarm Optimization (PSO) algorithm is developed to seek the optimal solution. Numerical results show that the concentration of 1,3-PD at the steady-state moment is increased considerably.
A Prediction Method for Nonlinear Correlative Time Series
Authors: Yuan Cong Gui , Zhang Xin Zheng , Xu Shu Qiong
Published: November 2010

A nonlinear correlative time series prediction method is presented in this paper.It is based on the mutual information of time series and orthogonal polynomial basis neural network. Inputs of network are selected by mutual information, and orthogonal polynomial basis is used as active function.The network is trained by an error iterative learning algorithm.This proposed method for nonlinear time series is tested using two well known time series prediction problems:Gas furnace data time series and Mackey-Glass time series.
Research on Trust Problems in B2C E-Commerce
Authors: Wang Ying , Gao Qin , Zhang Yuan Yuan
Published: November 2010

With the rapid development of e-commerce in China, the trust problems in B2C e-commerce has become a hot issue. This paper introduces the concept of trust and analyzes the existing trust problems in e-commerce in China. And the corresponding countermeasures are proposed.
Automatic Acquisition and Testing System for Air Compressor Performance
Authors: Tie Zhan Xu , Zhao Li Jun
Published: November 2010

The design and main functions of the automatic acquisition and testing system for air compressor performance was Introduced. The system has the following advantages, such as excellent practicability, rapidity, stability, reliability, operability, development, monitoring, and good security feature. The system can give Real-time processing on test data and compile test reports of the piston compressor. The system can display, save and print performance curve, respectively.
Development of the Automobile Steering System
Authors: Hu Ai Jun
Published: November 2010

The automobile mechanical steering system, hydraulic power steering system, electro hydraulic power steering system, electric power steering system, active front steering and steer-by-wire system were introduced in this paper. It is indicated that the integrated control technology of active steering and vehicle are the future development tendency.
NC Application in Rolling Machining of Special Section Tube
Authors: Nie Shou Feng , Geng Zai Dan , Yu Ying Liang
Published: November 2010

The special section tube was machined by special NC reconstruction according to constituents of rolling motion. The rotation of driving and driven roller was controlled directly by servo motors and the rolling machining was controlled by converting linear motion into rotary motion. The principle, control and implementation and the analysis of the bending deformation regularity and influencing factors affecting the uniformly accelerated motion and measures were elaborated. The structural reconstruction and the parameters conversion and the reason why the machining accuracy improved were analysizedanalyzed. The NC reconstruction in rolling machining of the special section tube had good effects on the practical application and the function and application scope of NC technology were expanded
Design of Face Gear Drive with Spur Pinion and Experimental Test
Authors: Tong Jing Lin , Shen Yun Bo , Wang Xiao Bo
Published: November 2010

Based on the technology of face gear shaping, the tooth surface design and geometry were investigated that include tooth generation, limiting inner and outer radii. The computer were applied to simulated tooth contact analysis and transmission ratio of gear drive. A novice method is proposed for face gear generated by use of a general shaper. A face gear with 77 teeth was generated successfully by the shaper. For the purpose to certificate the bearing contact of gear drive, an experimental investigation was also developed in the bevel gear meshing machine. The results show the experimental bearing contact of face gear drive is correspondence to the computerized design, which validated the feasibility of face gear shaping by a general shaper.
Research on Data Processing Method of the CAD/CAM Integrated System of Super-Hard Cutting Tools
Authors: Niu Qi Lin , Wu Zhao Yun , Liu Nan Bo , Hu Shu Long , Yang Cheng Lin
Published: November 2010

Application of the CAD/CAM integrated system is an effective means to improve the information technology level of the super-hard cutting tool enterprises, and the foundation and core of system development are the data processing. The structure and function of the CAD/CAM integrated system of super-hard cutting tools were analyzed. The requirement on processing data of the system was put forward. Some data processing methods were discussed, which included the database structure design, the query of design parameters and the feature information model of super-hard cutting tools in the system. Finally, the realization means of data processing were given. In short, it reduced the complexity of the development process, effectively improved the running performance of the system.
Experiment Study and Finite Element Analysis of Single-Axis Acoustic Levitator
Authors: Du Bao Yu , Xu Xiao Zhuo , Zhao Bo
Published: November 2010

A single-axis ultrasonic levitator applied in containerless processing of materials was introduced. It could suspend steel ball with density of 7.9 g/cm3 as well as else material samples easily. The finite element model of singe-axis ultrasonic levitator was developed to study the incident acoustic fields. Three-dimensional distribution of time-averaged potential is focused and the results are successful to confirm some experimental phenomena such as the movement of sample along concave reflector and the deviation of object near the reflector.
Design and Analysis of Office Air Conditioning System of Distributed Independent Air Supplying
Authors: Yu Xu , Yuan Biao
Published: November 2010

Aimed at the problem of huge energy consumption of traditional office air conditioning units, this paper has put forward a new energy-saving and high-efficient office air-conditioning system for centralized work place which is independent in air supplying and can supply cooling or heat on demand and has adopted intelligent control. The paper introduced the structure and working principles of the new air conditioning system, for example, the innovative distributed air supplying system, the frequency-converting air conditioning technology and intelligent control system. The paper also analyzed the advantages of performance, and the new air conditioning system is more energy-saving and comfortable compared with the traditional air conditioning system.
Application of Reverse Engineering to Product Development
Authors: Mochizuki Tatsuya
Published: November 2010

This 3D optical metrology has become a standard tool in industrial process chains by providing fast and precise full-field 3D data for quality control, rapid manufacturing and reverse engineering applications. In this report, the trend that 3D optical metrology has widely used by the product development is described. Concretely, it is described to inspect shape on the free-form surface, to digitize the design model, to manufacture solid shape without CAD model, to define CAE model from real shape, to make analysis for sheet metal components, and to make real-time strain measurement for tensile tests.
Value-at-Risk Estimation Based on Empirical Likelihood Method
Authors: Meng Zhao Wei , Yu Pei Chao
Published: November 2010

Value at Risk ( ) is a method using statistical knowledge to measure financial risks, and its calculating core is to estimate or predicate fluctuation of the financial assets price. In recent years, the main method of estimating and predicating fluctuation of the financial assets price is the GARCH model. So to determine a reasonable GARCH model becomes the crux of calculating. In this paper, we proposed using empirical likelihood method to estimate , and we also proved that the empirical likelihood method is more effective and more concise than other current methods by simulation analysis.
Supply Chain Equilibrium under Asymmetric Information Based on Information Transparency Model
Authors: Ma Xin
Published: November 2010

In a supply chain, different companies have different, even conflicting goals and make decisions based on their own profit, so the asymmetric information can be found everywhere. The informed party may withhold or convey wrong information, and the uniformed party wants to get it or verify it. The screening and signaling increase contract cost and decreases supply chain efficiency. Hence, the asymmetric information is the main cause which leads to non-coordination. The information transparency model is built to analysis the game process among the players in the supply chain under the asymmetric information, and the condition of supply chain equilibrium is also discussed in this paper.
Research on Microencapsulated Aquatic Feed Preparation Based on Micro-Jet Spraying Technology
Authors: Chen Shu Fa , Dai Hong Juan , Zhou Hong Liang
Published: November 2010

Based on micro-jet spraying technology, by spouting fluidized bed, aquatic feed encapsulating mechanism and experimental process were introduced, experimental conditions and parameters were discussed.Granular aquatic compound feed encapsulating experiments were done by spouting fluidized bed, the relationship between membrane thickness and microencapsulated time was analysed, stability indices of microencapsulated feed in the water was determined, the test results show that based on micro-jet spraying technology, feed encapsulating experiment parameters controlled easily, microencapsulated feed in smooth shape and good stability, the loss rate of microencapsulated feed in dissolution is less than that of unmicroencapsulated feed, and the spouting fluidized bed in low cost and power consumption , handled easily , so has great promotional value.
Experimental Study of the Light Scattering Induced by the Surface Roughness of the Ultraprecision Machined Workpiece
Authors: Cheng Chun Der , Tsai Hsi Hsun , Feng Hui Ping
Published: November 2010

An in-situ measurement technique of the surface roughness of ultra-precision machining by optical characteristic effects is fundamental thanks to the probe-less which would avoid the contact damage on the surface. Since the plastic lens molding reprints the roughness from the mould core fabricated by machining, the tool marks induce the poor surface of the plastic lens. By a laser with a short wavelength of He-Ne of 632 nanometers, the machined surface would reflect the input light. Several samples with different surface roughness of the aluminum by varying the feed rate of the ultra-precision machining are used to be measured by the He-Ne laser. The 1 x 16 photo-diode array with the pitch of 2.0 mm is constructed to measure the distribution of the optical scattering effect under the light source of He-Ne laser. Results show that the higher surface roughness gives a more expanse distribution of the light scattering. Besides, the BSDF of the machined surface is proportional to roughness. Using the ratio of the main and side measuring channels of the photo-diode array would give a suitable approach to construct the relationship between the light scattering and surface roughness. Therefore, the laser and the photodiode array would predict well the roughness of the ultra-precision machined surfaces of aluminum. The on-line measurement technique for the roughness by reflected light scattering effect from the ultra-precision machined surface is constructed nice in this study.
Comparative Analysis of Three General Game Players
Authors: Li Zhen Dong , Feng Li Chao , Zheng Shu Qing , Gong Dian Xuan
Published: November 2010

This paper presents the cases of three Association for the Advancement of Artificial Intelligence (AAAI) General Game Playing (GGP) Competition winners named Clune player, Flux player and CADIA Player in detail. The paper describes architectures of three players and how they work. The paper gives insight into the approaches the three players take and key features of their models. Lastly, this paper makes further analysis about the advantages and disadvantages of the three players’ models and makes some comparisons among the three players.
Partheno Genetic Ant Colony Optimization Algorithm and its Application
Authors: Wang Guo Li , Wu Jian Hui , Su Yu
Published: November 2010

Ant colony algorithm is a kind of effective combinatorial optimization problem solving algorithm has been increasingly, thorough research, and gradually get used. Ant colony algorithm is a set of parameters, the algorithm, a lack of adequate experiences often. The paper has put forward a single genetic character of ant colony algorithm. Will the ant colony algorithm each search results as the initial population, single genetic improvement, for the shortest route optimization. In the traveling salesman problem of the experiments prove the effectiveness of the proposed algorithm.
Concurrency Control Protocol for Real-Time Database and the Analysis Base on Petri Net
Authors: Chen Jun , Wang Yu Fen , Wang Jian Ping
Published: November 2010

In the article a new concurrency control protocol for real-time database (RTCC) is proposed. The protocol based on the traditional speculative concurrency control protocol (SCC). It dynamically establish the maximum of shadow to reasonably use the resources of system and add the quasi-commit phase to avoid many unnecessary restarting and enhance the concurrency of transaction. The theory of Petri net proof and results of experiment show that this protocol is feasible and effective , and it can meet the needs of real-time transaction. Speculative Concurrency Control is suitable especially for real-time database[1]. On the one hand, SCC is similar to PCC, to detect potentially harmful conflict as early as possible, so as to start a replacement schedule, thereby increasing the opportunities for transactions to meet time limits. On the other hand, SCC is similar to OCC, it allows the concurrency of conflict transaction and, therefore, avoids unnecessary matters that may affect the timely submission of delay. As a result, it alleviates the congestion problems and PCC restart OCC's problems, in order to better meet the transaction deadline. Based on the fact above mentioned, we propose a suitable real-time database concurrency control protocol [2,3] (RTCC: Concurrency Control protocol for Real-Time). The protocol of the SCC protocol on the traditional basis with a series of improvements can avoid a large number of unnecessary transaction restart and improve concurrency. Finally, by Petri net theory it can be proved feasible and correct.
The Research of Temporal-Based Authorization for Group-Centric Secure Information Sharing
Authors: Li Pei Wu
Published: November 2010

In this paper, we propose a temporal-based aythorization model for Group-centric Secure Information Sharing(g-SIS) . The traditional approach to information sharing focuses on attaching attributes and policies to an object as it is disseminated from producer to consumers in a system. In contrast, group-centric sharing brings subjects and objects together in a group to facilitate sharing. In such contexts, authorizations are influenced by the temporal ordering of subject and object group membership. That is, the authorizations are decided by the time that subject joins group and the time that object is added to group. But, the model doesn’t consider the time constraint of group enabling and access enabling. For example, a secure meeting room is open only at 8:00—10:00 am and 15:00—17:00 pm every Monday. We develop a temporal-based authorization model for group-centric information sharing which takes the temporal intervals of group and access enabling into consideration. We also discuss a usage scenario to illustrate practical application in secure meeting system.
Multiple-Instance Classification via Generalized Eigenvalue Proximal SVM
Authors: Wang Zhen , Li Dong Mei
Published: November 2010

The multiple-instance classification problem is formulated using a linear or nonlinear kernel as the minimization of a linear function in a finite dimensional real space subject to linear and bilinear constraints by SVM-based methods. This paper presents a new multiple-instance classifier that determines two nonparallel planes by solving generalized eigenvalue proximal SVM. Our method converges in a few iterations to a local solution. Computational results on a number of datasets indicate that the proposed algorithm is competitive with the other SVM-based methods in multiple-instance classification.
A Parallel Calculation System for the Shortest Path in Traffic Network
Authors: Zhang Lin , Yang Zhao Sheng , Jia Hong Mei , Wang Bin
Published: November 2010

The execution time of shortest path computing determines the efficiency and quality of dynamic traffic assignment. This paper focuses on the design of a parallel calculation system for the shortest path in traffic network aims to reduce the execution time of shortest path computing in dynamic traffic assignment. Here we mainly focus on the process of algorithm parallelization and network decomposition. As the core of the system, a two-queue parallel algorithm is designed for the shortest path in the traffic network which the recursive spectral bisection decomposition approach is employed to separate the network into several parts and the algorithm acts on every sub-network on each processor. The proposed system are experimented on real traffic network and a set of policies are employed that the number of processors is designed in each policy in the study case, and the performances of the parallel calculation system are discussed, the proposed algorithm is proved to be the efficient and effective.
The Determination on Minimal Covering of Regular Separable Function Sets in Partial Four-Valued Logic
Authors: Zhou Xiao Qiang
Published: November 2010

In the structure theory of many-valued logic function, the decision and constitution of the Sheffer function is a very important problem, which is reduced to the decision of the minimal covering of precomplete sets in the many-valued logic function sets. According to the completeness theory in partial k-valued logic and the similar relationship theory among precomplete sets, in this paper, the methods of determination on the minimal covering of regular separable function sets are found out, and the minimal covering of regular separable function sets in partial four-valued logic are decided.
Prediction Model for Power Transmission Line Icing Load Based on Data-Driven
Authors: Li Peng , Li Ning , Li Qi Mao , Cao Min , Chen Huo Xing
Published: November 2010

How to monitor and predict icing load of power transmission lines are important problems for the reliability of power grid. A model based on data-driven is presented here to predict the icing load of transmission line, which is available to forecast the icing disaster of it. The fitfulness, which influencing the prediction results of icing load, is analyzed and discussed in this paper. According to the results of simulation, this model has a good accuracy of prediction if the training data and prediction data are in the same icing process. If the icing process is not same but contiguous, it also can predict the degree of icing load qualitatively.
Study on Pressure and Temperature Characteristics of Sensitive Rubber Composite
Authors: Bing Guo , Lan Qin , Biao Wei
Published: November 2010

In order to design and fabricate the flexible force sensor , we have researched the piezoresistivity of silicon rubber/ carbon black composites and given the academic calculation formula between pressure and electrical resistivity. The experiments illustrate that the homogenization of carbon black and the elastic modulus of composites can be improved effectively by dispersing nanosize silica filler and using organic solvent . As a result , the piezoresistivity of composites can be improved. Carbon black content of 10% with good pressure-sensitive conductive rubber, heat-sensitive in a certain pressure range is also good.Moreover , the fore - sensitive device fabricated by the composites is free from the limitation of the surface shape of the tested objects which can be widely applied to various squeeze stress measurement on any regular and unregular curve surfaces.
Qualitative Analysis and Quantitive Account for Tunnel Fire Location
Authors: Zhu Ling Qi , Zhou Xin Quan
Published: November 2010

Fire is one of the major hazards in coal mines. After the fire broke out.the primary task of disaster rescue is to judge the location of fire and it is the prerequisite of analyzing the combustion state, the base of fire prediction. In this paper, the method of tunnel fire location judgment combining with qualitative and quantitative analysis is used, it includes the qualitative analysis basing on sets theory and quantitative analysis on fuzzy clustering. The potential location can be conversely reasoned by the warning sensors and the scope can be narrowed down widely. On this basis, the distance and similarity between the veritable time difference and the numerical simulation difference are calculated and by the value we can know the site of the fire.
Stability and Bifurcation Analysis in a Delayed Predator-Prey Model with Stage-Structure and Harvesting
Authors: Jiang Zhi Chao , Nie Ming Wei
Published: November 2010

In this paper, we investigate a delayed stage-structured predator-prey model with continuous harvesting on prey. Positivity and boundness of solutions and sufficient conditions of the stability of equilibria are obtained. Using and as bifurcation parameters, the existence of Hopf bifurcations at equilibria is established by analyzing the distribution of the characteristic values.
Regularity of the Very Weak Solutions for Double Obstacle Problems
Authors: Xu Xu Juan , Lu Xiao Na , Tong Yu Xia
Published: November 2010

The apply of harmonic eauation is know to all. Our interesting is to get the regularity os their solution, recently for obstacle problems. Many interesting results have been obtained for the solutions of harmonic equation ande their obstacle problems, however the double obstacle problems about the definition and regularity results for non-homogeneous elliptic equation. In this paper , the basic tool for the Young inequality,Hölder inequality, Minkowski inequality, Poincaré inequality and a basic inequality. The definition of very weak solutions for double obstacle problems associated with non-homogeneous elliptic equation is given, and the local integrability result is obtained by using the technique of Hodge decomposition.
An Effective Tabu Search for the Vehicle Routing Problem with Backhauls
Authors: Liu Chang Shi , Li Liu Xun , Wu Jun
Published: November 2010

The vehicle routing problem with backhauls (VRPB) is considered in this paper, and an effective tabu search is proposed for VRPB to minimize the used vehicle number and total travel distance. The proposed approach is compared with the greedy randomised adaptive memory programming search published recently for the same purpose, the results show the high performance and effectiveness of our approach.
A Automation Library Management Method Based on Knowledge Management Tools
Authors: Ji Zhi Gang
Published: November 2010

The use of knowledge management tools definitely improves the quality of services offered by the digital libraries. As, these tools are mainly open source it’s easy to integrate these tools for the effective knowledge management given the condition, the basic purpose of implementation is clear. There may be different hurdles that might come while the implementation of the tools. These hurdles can be overcome with the help of the proposed framework which is very much efficient in integrating these tools with effective library management.
Synthesis of Al-Doped ZnO Nanoparticles and its Electromagnetic Performance
Authors: Jia Yan Qiang , Shi Dong Mei , Yan Jun
Published: November 2010

Al-doped ZnO (AZO) nanoparticles were synthesized by using homogeneous precipitation method from Zn(AC)2•2H2O and Al(NO3)3•9H2O. X-ray diffraction (XRD) showed that the AZO nanoparticles were well assigned to hexagonal wurtzite structure, and that the Al3+ did enter the ZnO crystal lattice to substitute the position of Zn2+. Results from scanning electron microscope (SEM) showed that with increasing Al content, the the size of ZAO particles decreased. When Al content was 5 mol%, gives a more homogeneous and finer microstructure. At last, study the electromagnetic performance of AZO particles with different doping concentration of Al3+.
Singularity Elimination of Stewart Parallel Manipulator Based on Redundant Actuation
Authors: Cao Yi , Zhou Hui , Li Bao Kun , Long Shen , Liu Meng Si
Published: November 2010

This paper mainly addresses the principle of the singularity elimination of the Stewart parallel platform. By adding appropriate redundant actuation, the rank of the Jacobian matrix of the parallel platform is always full, accordingly the singular value of the Jacobian matrix of the parallel platform is nonzero. Then the singular configuration of the parallel platform can be eliminated by adding one redundant actuation. Numerical examples are taken to illuminate the principle’s effectiveness. It is shown that not only singular configurations of the Stewart parallel platform can be eliminated, but also performances of kinematics and dynamics of the parallel platform can be greatly perfected by adding appropriate redundant actuation.
Research on Structure and Model of E-Commerce Based on Web Mining
Authors: Hao Xu
Published: November 2010

As one of the key applied forms on Internet, E-commerce has been growing at a very high speed in China in recent years. Starting from the perspective that E-commerce consumers pursue low price while retailers try to decrease the cost. Data mining is a form of knowledge discovery essential for solving problems in a specific domain. Individual data sets may be gathered and studied collectively for purposes other than those for which they were originally created. Data mining is most commonly used in attempts to induce association rules from transaction data.
Image Compression Algorithm with Radix-4 FFT
Authors: Deng Jia Bin , Hu Juan Li , Chi He Hua , Wu Jue Bo
Published: November 2010

Image compression technology has been the research focus in the field of image processing all the time. In this paper, Radix-4 FFT is introduced to realize limit distortion coding of image. The presented method aims to solve the problems of Fourier transform on existing complexity and long time-consuming, and it can reduce the number of data store by conformal symmetry of Fourier transform. Using Radix-4 FFT, the time-consuming can be highly shortened and two different kinds of quantization tables are designed according to image compression ratio and the quality of image.
Data Mining and Heuristic Algorithm for Electronic Commerce
Authors: Ren Guo Can
Published: November 2010

Electronic commerce is becoming increasingly important in business, but lack of intention to purchase has become a main barrier in the development of electronic commerce. Thus, effective measures are needed to promote consumers’ intentions to purchase in online consumer to consumer stores. This paper will discuss issues about goods delivery cost and delivery quality in E-commerce. According to the result of research, the paper predicts the future development trend of China E-commerce.
Composition Identification of Typical Decorative Textiles in Tibetan Historical Buildings by Burning Test and Projection Microscope Test
Authors: You Fei , Yang Feng , Ren Min
Published: November 2010

To prevent decorative textiles from fires, forty seven fabrics sampled from the Potala Palace were first identified by burning and optical projection microscope tests. The main component fibers were figured out to be cellulose fiber (viscose, most much used), synthetic fibers (polyethylene terephthalate, polyamide and polypropylene, secondly much used) and protein fibers (silk and wool, a little used). The five warp and weft blending forms were found to be: Polyethylene Terephthalate and Polyethylene Terephthalate, (Polyamide or Polyethylene Terephthalate or Silk or Viscose or Wool) and Viscose, Viscose and Silk, (Polyethylene Terephthalate or Polyamide) and Polypropylene, Viscose and Polyamide. Such identification work has been done academically for the first time, and it is important for the safe conservation of special Tibet historical buildings and internal cultural relics.
Distributed Biological Datasets Index Model
Authors: Liu Peng Fei , Dong Shou Bin , Cao Yi Cheng , Du Zheng Ping
Published: November 2010

DBioSearch is a distributed model optimized for indexing next-generation exploding sequence data including the human genome and other biological sequence data. It is modeled in view of the distributed programming and text search engine Lucene, and reports good indexing efficiency for each kind of biological datasets. Indexing on large volume of sequences could be time consuming, but DBioSearch uses the distributed programming skill to parallelize indexing process that can take advantage of multiple computing nodes.
Design and Realization of Submarine Voyage Training Simulation System
Authors: Xiao Jian Bo , Hu Da Bin , Ji Xia
Published: November 2010

The traditional submarine voyage training has problems of high cost, long period and high risk. In this paper, a submarine voyage training simulation system was proposed based on virtual reality and submarine control theory. At first, the construction of the system and the functions of modules were described. The coach control system based on digital chart was realized, which can achieve functions of training environment and parameters setting. The model library of virtual ocean scene was built and then the scene was rended by Vega Prime. In order to remedy the deficiency of the network, a DR algorithm was explored, which can satisfy the realtime requirements of scene simulation and achieved the frame alignment between channels and coherence of observers.
Digital Calibration for Current-Loop Output of Piezoresistive Sensors
Authors: Yan Chao , Ding Jian Ning , Li Zong Xing , Mao Chao Min
Published: November 2010

The precision of piezoresistive sensors is low between wide temperature range .The conditioning result isn’t ideal by analog approaches. Also the efficiency is very low. To improve this condition , a digital approach is introduced. It coverts sensors’ analog signal to digital value, and then uses polynomial and coefficients stored in singlechip to correct the digital value. At last , the singlechip coverts corrected digital value to analog signal to output. Its conditioning principle and calibration process is also described. We realized 4-to-20mA-current-loop-output of piezoresistive sensors using this aprroch. Calibration results show this method is efficient and low cost.
Experiment and FEM Analysis for Fracture of Fan Blades
Authors: Huang Hai Ming , Jiao Wen
Published: November 2010

The fracture mechanism of fan blades in the subway system is analyzed by using the finite element method (FEM) and some experiments. Firstly, the mechanics performances of blade materials are obtained on the basis of the hydraulic testing machine. Then, the fracture surface of blades is measured with a scanning electron microscope (SEM). In the end, the natural frequencies of rotation blades are estimated by the means of nonlinear FEM program. It is shown from both the experiment and simulation results that the mechanics performance of blade materials is lower than its national standard, which is due to much bigger gaps and some inclusions in the cast fan. When voltage rises, the 79th natural frequency of blades becomes too approaching the rotating speed of fans easily to resonate. The biggest stress location of fan blades caused by centrifugal force, wind load and resonance is consistent in the fracture place, so the design of fan blades should be improved and optimized for preventing fracture.
A New Threshold Password Authentication Scheme
Authors: Lee Yung Cheng
Published: November 2010

The well-known password authentication mechanisms are widely used in networks to protect resources from unauthorized access. The ad hoc networks, due to their dynamic and lack of network infrastructure features, require authentication schemes to ensure security. In this paper, we propose a new threshold password authentication scheme for ad hoc networks. Our scheme can be efficiently implemented in mobile devices, and can achieve mutual authentication with registered users.
Research on Simulation of Hydraulic System of Bending Roll
Authors: Han He Yong , Zhang Hong , Wang Jing , Wang Jun , Huang Qing Xue
Published: November 2010

The hydraulic bending roller system, as a kind of most effective shape control process, has already become the key technology that used in shape control of the leveller at present. For hydraulic bending roller system, a mathematical model of dynamic characteristics of electro-hydraulic system was built .According to analyze the system, the parameters effect the pressure fluctuation of the system was obtained. A more effective control strategy was proposed to decrease the effect of the pressure fluctuation to the system.
Finite Element Simulation of the Hot-Rolling Process of Titanium Alloy Bar
Authors: Shuai Mwi Rong , Huang Qing Xue , Zhu Yan Chun
Published: November 2010

In order to overcome the drawbacks in the process of the titanium alloy, the authors propose to produce this kind of bar by Y-type rolling mill. The deforming process of titanium alloy has been simulated dynamically using MSC.Marc finite element software. The stress, strain, temperature and residual stress distributions of deformation area have been analyzed. The rolling force and torque have been obtained. The model could provide the foundation for further theoretical research and engineering application of titanium alloy bar rolling process.
Numerical Simulation of Stamping Right-Hand Front Rail with Hot Strip Steel
Authors: Peng Xing Dong , Li Sheng Li , Li Na , Xu Jie , Chang Lian Xia
Published: November 2010

The use of hot strip steel instead of part of cold strip steel in making automobile inner board has been considered for cost reduction of materials. To analyse formability of hot strip steel with the thickness of 1.6mm and 2.0mm in making automobile right-hand front rail，a systematic study was made by means of numerical simulation of stamping and stamping experiments in reality.A 3-dimensional finite element model was built to analyse the thinning, major strain, effective strain, effective stress and formability of hot strip steel.The simulative results indicated that two sizes of hot strip steel could deform well. The simulative results were compared with the experimental ones, and good consistency was observed.It is a helpful exploration to apply hot strip steel in making automobile inner board, and to apply numerical simulation of stamping in actual production.
Analysis on the Super-Winding Accident of Casting Crane and Configuration of the Safeguard
Authors: Wen Hao , Wang Quan Wei , Zheng Guang , Wang Bin
Published: November 2010

This paper analyzes the super-winding accident of casting crane and the configuration of the safeguard, it adopts the method of reliability analysis and calculation in each safeguard setting project, and the concept of safety integrity levels (SILs) is introduced in the hoisting mechanism. This study has significance that advances security design and avoids super-winding accident in the casting crane.
Research on Rolling-Cut Double-Side Shear in Kinetics
Authors: Chu Zhi Bing , Huang Qing Xue , Ma Li Feng , Zhang Ji Dong
Published: November 2010

A simplified model based on linkage mechanism was set up through analysis of space shear mechanism and kinetic theory of new-type rolling cut double-side shear, complex and matrix has been developed for establishing the kinetic model of linkage mechanism, a novel method for quantitative analysis of rolling-cut double-side shearing was proposed and the efficiency of above mentioned method is illustrated by practical application of kinetic analysis.
Straightening Technology Research of Aluminum Profile for Vehicle
Authors: Hao Jian Jun , Huang Qing Xue , Zhang Xue Liang
Published: November 2010

Based on straightening principle of profile straightening equipment, the relationship between process parameters and quality of profile straightening is studied, which can provide basis for optimization and selection of process parameters.
Stability and Antioxidant Activity of Polyphenols in Methanolic Extracts of Sonneratia caseolaris Seeds
Authors: Limmatvapirat (1) Chutima , Charoenteeraboon Juree , Wetwitayaklung Penpan , Sukonpan Chanokporn , Phaechamud Thawatchai
Published: November 2010

Polyphenols in methanolic extracts from Sonneratia caseolaris seeds were determined by HPLC coupled with electrospray mass spectrometry and quantified by HPLC coupled with ultraviolet/visible detection in order to evaluate their stability of the extracts during 6 months of storage. Antioxidant activity was measured by using TEAC assay, and the free radical scavenging activity was monitored in the initial 3 months of the stability evaluation. Study on the effect of temperature on the stability of the methanolic extract indicated that gallic acid, luteolin-7-O-glucoside, and luteolin were unstable at 25 and 45°C during storage time. At -80 and 4°C the quantities of luteolin-7-O-glucoside reduced while those of luteolin increased at the same time. The results suggested that luteolin-7-O-glucoside was hydrolyzed to luteolin. Therefore the polyphenols should be kept at low temperature. Antioxidant activity of methanolic extract was preserved in all temperatures during the first 3 months.
The Research on Smart Drill-In Fluid Design
Authors: Li Zhi Yong , Yan Jie Nian , Jiang Guang Cheng , Xie Shui Xiang , Fu Ying Jun , Zang Wei Wei , Yang Shuai Wei
Published: November 2010

There are continuous high concerns on formation protection technology in international petroleum engineering field. The reservoir drill-in fluid (RDF) is the first non-native fluid to contact formation, and which influences directly the ultimate capacity of oil and gas well. The paper discusses the smart RDF design method based on conventional drilling fluid. The designed RDF system is characterized as good formation damage control, as well as the performance easily adjusted for field application. The technology combines ideal packing technology with active calcium carbonate to obtain low permeability filter cake, high return permeability and low initial flowing pressure. The sized calcium carbonates contribute to develop sealing zone for preventing filtrate and solids from invading into formation, and the organophilic passageway in filter cake (the active calcium carbonate) is favorable to open automatically passageway for oil and gas during production. Different modifiers used to ground calciumcarbonate surface modification are evaluated in laboratory. And the laboratory results show modified calcium carbonates are comfortable with conventional drilling fluids additives such as XC(Xanthan ), potassium polyacrylate(K-PAM), sodium carboxymethyl cellulose(Na-CMC).
Study on Desulfurizing Capability of XuanHua Steelworks Titanium Slag
Authors: Zhang Zhi Xia , Hu Chang Qing , Wei Hang Yu , Zhang Yu Zhu
Published: November 2010

The influence of Titanium slag with different compositions on desulfurizing was investigated, and the influence reasons based on the experiments of viscosity was also analysed. Basicity and composition of the slag was optimum as follows: the basicity 1.15~1.2, the content of TiO2 under 7wt%, the content of MgO 10wt%~11wt%, the content of MnO2 0.5wt%, the content of Al2O3 under 11wt%.