bluuebunny/crossref_metadata_2025 huggingface dataset:
Quasi-Sliding Mode Control for Single Inverted Pendulum System
Authors: Wang Hong Mei , Zhang Hou Sheng
Published: January 2012

Inverted pendulum system is a nonlinear, coupling, multi-variable and unstable system. Because the inverted pendulum system exists all kinds of disturbs inevitably, the states have errors and the accuracy of control drops. In this paper, quasi-sliding mode control is used to achieve optimal control. First, the state-space model of the system is created by force analysis. Then, in the design of the controller, we make use of the sliding mode control, which has the advantage of anti-interference. To reduce the chattering phenomenon, we utilize saturation function in the reaching low design. The simulation results show the effective of the method
Implementation of a Data Mining System Based on Grid Computing
Authors: Han Yu Zhen
Published: January 2012

Grid computing is a new and quickly developmental calculation model with the development of Internet technology, focuses on integrating distributed, heterogeneous and idle computers from the Internet to be a service system with high performance. This paper gives a brief introduction of grid computing, and do research on the architecture and implementation of a data mining system based on grid computing, that is DMSGrid, a grid computing data mining applications, not only considers efficient parallel computing as a crucial aspect, but also takes into account dynamic resource configuration and provides an engine to execute the algorithm flow specified in an application.
Campus Network Security Program Based on Snort Network Security Intrusion Detection System
Authors: Jia Ling
Published: January 2012

This paper studies the security problems of campus network and summarizes the current on the current security risks and threats that campus network faces, focusing on analysis of attack-defense strategies on DOS network layer, proposing the security program of campus network which uses firewall as well as network security intrusion detection system snort. This paper analyzes the functional advantages of the program and presents in details the setup deployment and collocation methods of network security intrusion detection system based on snort in the campus network, and its application results are also summarized.
Testing and Analysis of Intensity of Illumination of Manual Assembly Workbench Surface
Authors: Du Yan Wei , Yu Guang Wei
Published: January 2012

the manual assembly line used for assembling a certain type of lighting panel was introduced. The manual assembly works were analyzed. The assembly workbench surface illumination of the assembly line was tested. According to the light source is linear form, the assembly workbench surface was divided into some rectangles firstly. The intensity of illumination of these rectangles centers were tested by the illuminance meter. The average illuminance was also calculated out. According to these values, the illuminance curves were draw, which were approximately parallel lines. Further, the time values of the workers complete the same assembly work in different illumination were measured. The analysis reveals that the high illumination or the low level of illumination will affect the work efficiency. The reasonable illumination interval values were found. The testing and analysis provide scientific basis for the adjustment of the workbench illuminance and the improvement of working environment lighting.
The Research and Implementation of KNX Communication Kernel Based on ATMega32
Authors: Wu Ya Hu , Han Ning , Yan Di
Published: January 2012

According to current research review of KNX technology, a hardware platform which core processor is ATMega32 is designed to implement KNX communication kernel. The software architecture of KNX communication kernel is key research in this paper, which is divided into three parts: communication, management and application. Meanwhile, working principle and achieved function of KNX communication kernel are discussed in detail. Finally, an application example is used to test the function of kernel. Research and implementation of KNX communication kernel based on new hardware platform will significantly reduce development costs of KNX device, benefit for application for KNX, and prompt market penetration.
Design and Implementation of Airline Customer Segmentation System Based on Ant Colony Clustering Algorithm
Authors: Wei Li Feng
Published: January 2012

Segmentation based on customer value and needs can better guide marketing decision-making of airlines as well as better understand needs of high-value passengers. To address customer segmentation in Customer Relationship Management (CRM), the paper proposed and designed airline customer segmentation system structure based on ant colony clustering. The key ant colony clustering algorithm was also designed and implemented. The ant colony clustering algorithm mainly used adaptively adjusted group similarity to perform clustering and access to initial clustering result. Then all data representation points and abnormal data were inputted into lattice plane scattered randomly. Ant colony algorithm was used for clustering once again and corresponding class label was used to delete abnormal values and obtain complete clusters. Data test example based on ant colony clustering customer analysis platform illustrated its feasibility and effectiveness
Research of Interleaved Code Applied in XCP Signal Processing
Authors: Jia Zhi Cheng , Song Xiao Hua , Li Yong Jun , Zhang Yan , Liu Ning
Published: January 2012

The XCP(eXpendable Current Profiler, XCP) is a one-time use of the current profiler observation instruments which is cheap, fast access to the parameters of the water velocity profile. The signal processing is an important part of the research of XCP. The paper discusses the coding study in the signal processing technology, analysises the interference and noise of the transmission line, uses the interleaved code method for reducing errors to improve the reliability of the communication, and simulates the interleaving encoding and decoding system by the Systemview tool, demonstrates the reliability and feasibility of data transmission by using interleaved coded.
Comparison of Three Rapid Transfer Alignment Algorithms
Authors: Dai Hong De , Zhou Shao Lei , Xu Qin Jiu , Wu Guang Bin , Wu Xiao Nan
Published: January 2012

Speed of transfer alignment affects the ability of rapid response of the weapons equipped on the ship or the plane, so rapid transfer alignment has been widely researched for the last two decades. The “velocity plus attitude” matching rapid transfer alignment algorithm which is presented by the American scientist Kain, who started the times of rapid transfer alignment, then lots of researches have been done based on Kain’s work, every one has its own advantages, and of course disadvantages. Three rapid transfer alignment algorithms called “velocity plus attitude”, “velocity plus rate” and “attitude plus rate” matching rapid transfer alignment, have been compared from the aspect of accuracy and speed in this paper, while the flexure of the vehicle and the lever arm errors occurred respectively. Simulations have been done for the comparison of these three rapid transfer alignment algorithms, results show that while there is no flexure nor lever arm error, the three methods perform the same in accuracy and speed, the “velocity plus attitude” is a little slower than the other two methods in the estimation of the misalignment, the flexure influence the “velocity plus rate” and “attitude plus rate” matching methods much more than the “velocity plus attitude” method, but the latter greatly affected by the lever arm error. The results of this paper can help engineers to chose better rapid transfer alignment algorithm in their work.
Research on a Characteristic Extraction Algorithm Based on Analog Space-Time Process for Off-Line Handwritten Chinese Characters
Authors: Zhu Cheng Hui , Xu Wen Jun , Wang Jian Ping , Xu Xiao Bing
Published: January 2012

On the absence of space-time information, it is difficult to extract the character stroke feature from the off-line handwritten Chinese character image. A feature extraction algorithm is proposed based on analog space-time process by the process neural network. The handwritten Chinese character image is transformed into geometric shape by different types, different numbers, different locations, different orders and different structures of Chinese character strokes. By extracting fault-tolerant features of the five kinds of the off-line handwritten Chinese characters, the data-knowledge table of features is constructed. The parameters of process neural networks are optimized by Particle Swarm optimization (PSO). The handwritten Chinese characters are used to carry out simulation experiment in SCUT-IRAC-HCCLIB. The experiment results show that the algorithm exhibits a strong ability of cognizing handwritten Chinese characters.
A Stereo Matching Algorithm with Support Regions Based on Color and Texture Estimate
Authors: Zhu Cheng Hui , Jiao Qi Yi , Wang Jian Ping , Xu Xiao Bing
Published: January 2012

A stereo matching algorithm with support regions based on color and texture estimate is proposed. Firstly, the initial support regions are selected from the image according to the distribution of the quantized color labels. Then, the texture similarity is used to determine the arm length growing and combine adjacent regions. The accurate support regions are obtained. Thirdly, the support weight is introduced under the constraint of support region. Finally, the initial disparity can be corrected by using disparity adjustment method until a reasonable disparity map is obtained. The experimental results show that the good disparity result can be obtained.
An Improved FFT Discrete Spectrum Correction and Weighted Alogrithm
Authors: Dai Yan , Pu Zhang Yin , Wang Huan
Published: January 2012

For the problem of spectrum correction in phase difference method, a weighed correction method starting from phase difference of secondary largest value is presented in this paper. By the analysis on correction error of maximum and the second largest value in phase difference method, It determines the maximum correction error and the second largest value and conducts error correction method of weighted joint calibration. In addition, it makes analysis on variance for correction result. Finally, the experimental result shows that the method can greatly improve spectral resolution than conventional phase difference method.
The Security of Shopping Online from Viewpoint of Law
Authors: Wang Xiao Yun , Ren Jun
Published: January 2012

Shopping online is a part of the E-commerce. The model of online shopping compared to the traditional ways has incomparable advantages, shows the strong vitality, and has been adopted by more and more consumers. Meanwhile, shopping online has a tumor—lower security, which is that this model has a high risk. Such as, the consumers worry what they bought are fake goods, the good is not in accordance with the description of the operator, their own rights may not be easily realized, etc. These problems have restricted the development of the E-commerce, and just depending on the improved network technique to solve the problem is impossible. What’s more important is to settle or improve the relative law system.
Identification of Lightning Disturbance in UHVDC Transmission Lines Using Correlation Degree Based on Short Time Window Data
Authors: Shu Hong Chun , Zhang Bin , Zhang Guang Bin , Duan Rui Min
Published: January 2012

In this paper, the simulation of ±800kV UHVDC transmission line in which fault lightning stroke and non-fault lightning stroke, line short circuit occur shows: because there is fault current lumped parameter access to earth during the fault lightning stroke or ground fault, the voltage waveform decrease suddenly and cross repeatedly the zero line in 5ms time window；There is no fault current accessing to earth during non-fault lighting stroke, the disturbance caused by lightning is too less than value of the pole voltage. The voltage waveform comes from the protect position change up and down around the direct voltage line and decays to the pole voltage line in the 5ms time window at last. In the case of the fault lightning or ground fault non-lightning, the correlation degree of transient component and pole voltage line in the time window is little. On the contrary, it is large during the non-fault lighting. Above this, the correlation degree is calculated using 5ms samples. This kind of algorithm can resist random noise effectively,calculating speed is very fast. Many PSCAD simulations show that the algorithm can identify lighting disturbance correctly.
Study of Strong Moire-Fringe Density and Direction in Noisy Phase Maps
Authors: Li Tian Ze , Hu Ke Ping , Hou Luan , Jiang Chuan , Zhang Xia
Published: January 2012

In this paper, strong Moire-fringe density and direction are studied in noisy phase maps using a preprocessing method of automatic Moire–fringe analysis. This information can be used to improve the performance of 2-D phase unwrapping methods, to construct phase-jump-preserving filtering strategies, and also to perform robust segmentation of phase data. The method is highly insensitive to noise, is model based and perforros the studies in the Fourier domain.
Research on Normal Motion of Specimen of Ultrasonic Feeding
Authors: Li Liang , Zheng Mian
Published: January 2012

In this paper, a micro structural model is applied to study the normal contact process of the specimen of the ultrasonic feeding. Firstly, the normal velocity of the specimen with the actuation of the oscillator is calculated by solving the nonlinear dynamical equation of the specimen. The theoretical results of the normal velocity are in good agreement with the experimental results under the same conditions. The theoretical results indicate that for the low frequency of the oscillator, at most time, the normal contact force is zero, whereas for the high frequency the normal contact force is periodical. In addition, the theoretical results also indicate the contact time between specimen and the oscillator in a period decreases with the increasing amplitude of the oscillator.
Indoor PM10 and PM2.5 at Nurseries and Primary Schools
Authors: Siv Sousa , Alvim-Ferraz M.C.M. , Martins F.G.
Published: January 2012

This paper aims to review the available studies that have been done concerning PM10 and PM2.5 concentrations in nurseries and primary schools since 2008, to provide a summary of the available scientific findings concerning the concentrations, indoor/outdoor (I/O) ratios and the sources. Levels of PM observed worldwide exceeded several times national legislations and WHO guidelines, especially in developing countries. I/O ratios were several times higher than 1 and high PM levels were reported as due mainly constant re-suspension of particles.
Design and Implementation of Network Management Architecture for Wireless Sensor Networks
Authors: Chang Ray I , Chuang Chi Cheng
Published: January 2012

Traditional NM (Network Management) techniques can not be applied on WSN (Wireless Sensor Network) due to its features of low computing ability, tiny memory space, and limited energy. A new NMA (Network Management Architecture) for WSN is needed. In this paper, we design a loosely coupled NMA of WSN based on SOA (Service-Oriented Architecture), and have well defined NM interfaces. Finally, we develop a SOA platform for WSN operations according to the NMA. Based on SOA platform, users can compose and use various NM Web Services by internet depending on their requirements. Heavy tasks which need a great deal of computing resources and storage are executed on the SOA platform. Thus, energy consumption and node computation can be decreased. Moreover, external applications use Web Services to integrate SOA platform for WSN. It lowers the difficulty in integrating different sensor platforms and heterogeneous devices.
Performance Comparison of Parallel Sorting Algorithms on Homogeneous Cluster of Workstations
Authors: Kyi Lai Lai Win , Tun Nay Min
Published: January 2012

Sorting appears the most attention among all computational tasks over the past years because sorted data is at the heart of many computations. Sorting is of additional importance to parallel computing because of its close relation to the task of routing data among processes, which is an essential part of many parallel algorithms. Many parallel sorting algorithms have been investigated for a variety of parallel computer architectures. In this paper, three parallel sorting algorithms have been implemented and compared in terms of their overall execution time. The algorithms implemented are the odd-even transposition sort, parallel merge sort and parallel shell sort. Cluster of Workstations or Windows Compute Cluster has been used to compare the algorithms implemented. The C# programming language is used to develop the sorting algorithms. The MPI library has been selected to establish the communication and synchronization between processors. The time complexity for each parallel sorting algorithm will also be mentioned and analyzed.
Research of E-Commerce Negotiation Strategies on Genetic Algorithm
Authors: Li Xiao Bo
Published: January 2012

With the electronic commerce's unceasing development, the traditional electronic commerce(e-commerce) flow and the support technology are facing up to the huge challenge. Therefore, it becomes a urgent needs to change traditional commerce pattern, as well as enhance the transaction efficiency and increase intellectualized degree of the transactions. But the agent technology's appearance has provided the new turning point for the intellectualization electronic commerce's development, also arose at the historic moment based on the agent e-commerce model. The agent technology and the genetic algorithm(GA) are discussed in this paper, together with the e-commerce on-line negotiations application, which provides the quota and the optimized model for on-line negotiations' development.
The Relay Protection Scheme for Distribution Network with Distributed Generations
Authors: He Shi En , Dong Xin Zhou , Bo Zhi Qian , Suo Nan Jia Le
Published: January 2012

Three-zone distance protection and four-zone zero sequence over-current protection are traditional relay protection schemes used for tapped-lines that connect distributed photovoltaic, wind, and small hydro power sources into a distribution network. These protection schemes cannot quickly clear the faults that occur at the end of the protected line. A newly developed non-communication protection scheme for tapped-line and double-circuit line tested at Gansu Power Grid can significantly speed up fault clearing at the end of the lines, and achieve fast tripping for the entire line section. This protection scheme also shows advantageous results for distribution grid with distributed generation.
Design and Realization of VOD System Based on Campus Network
Authors: Fu Rong Xia , Zhang Guang Bin
Published: January 2012

In this paper, all links of the Design and Realization of VOD System Based on Campus Network of Hebei Normal University of Science &Technology is researched. First of all, the paper analyses the system requirements, proposes the design ideas and objectives and gives the system design and Entirety functional block diagram. Then the paper gives a more detailed design of complete system. In the end, a system is completed. To ensure the quality of VOD, increase the number of the server that respond to customer service, browse fast and search video files, the system uses many technology such as intelligent video technology, multi-level admission control scheme and a variety of scheduling options and the dynamic tree traversal video files.
Feature Points Extraction of Chinese Characters Based on Blob Algorithm
Authors: Huang Xiao Yin , Fang Ning
Published: January 2012

The feature points extraction plays an essential role in modeling structure of Chinese characters for accurate recognition. The distortions caused by the thinning process make the thinning-based stroke segmentation difficult for extracting feature points and handle the ambiguous intersection regions. This paper proposes a novel method that overcomes the distortions to extract feature points from the thinned Chinese characters. Firstly, we use eight structural elements to thin a Chinese character in a series combined way, and then segment different kinds of strokes according to their properties after thinning preprocessing. Finally we draw the end points of every stroke based on the Blob algorithm and obtain the cross information at the same time. The feature points will be abstracted fast and exactly. The experimental results show that the proposed method is effective for Chinese characters recognition (CCR).
Research on the Fault-Tolerant Control Algorithm of SVPWM for NPC Three-Level Inverters
Authors: Ma Wen Zhong , Sun Jin Yan , Zhang Hong Mei , Tian De Bao , Pang Hong Fei
Published: January 2012

This paper mainly introduces fault-tolerant technology of three-level NPC inverters. For the three-level inverter topology and control characteristics, we use space vector (SVPWM) algorithm for modulation. when a short circuit fault in the inverter device,we use redundant space voltage vectors, and get control algorithm of redundant. Using MATLAB/Simulink software, a simulation model is analyzed, and the results demonstrate the feasibility of the method.
To Use ANSYS Software with Programming Ideas
Authors: Wang Li Xin , Qiu Wen Ge , Deng Qiu Chao , Yan Zhi Hua
Published: January 2012

In this paper, the viewpoint, which to use ANSYS software with programming ideas whatever the beginner, medium and advanced users, is put forward. This style of using ANSYS can make full use of ANSYS powerful functionality. There are many advantages, especially in modifying and deleting commands during an analysis, archiving and transferring your analysis documents, protecting your modeling and simulation intellectual property right, concurrent design and analysis, etc
Comparing with Two Calculate Methods of Radome’Electrical Properties
Authors: Sheng Xian Jun , Liu Min Jin , Pei Chang Ping , Guo Dong Ming
Published: January 2012

Under the demands of aviating aerocrafts’ pressure, heat and hard circumstance, the design of radome’ electrical properties must reduce the influences of radome to antenna electromagnetic field.So it is essential to analysis the radome electrical system performance and simulate accurately .The most widely-used methods in the radome engineering application currently is the ray-tracing (RT) method and the plane wave spectrum - surface integration (PWS-SI) method. The measured data and computing data of RT and the PWS-SI methods show their respective advantages.
An Improved Cooperative MAC Protocol Based on MILD Backoff Algorithm in WLAN
Authors: Liu Dan
Published: January 2012

In this paper, an improved cooperative MAC protocol which uses Multiplicative-Increase Linear-Decrease (MILD) backoff algorithm in the contention procedure to solve the fairness problem brought by Binary Exponential Backoff (BEB) is proposed for Wireless Local Area Network (WLAN). In order to improve the relay selection mode, the cooperative table in this improved cooperative MAC protocol is stored in the relay station, and we replace one field in it by the Destination ID. The simulation results show that the improved cooperative MAC protocol greatly enhances the throughput performance of the system and provides lower transmission delay in WLAN especially when there are few stations in the network.
The Study of the Multi-Body System Theory on Basis of CNC Milling Machine Error
Authors: Zhu Cheng Jun , Qin Qi Shu , Bao Peng Er
Published: January 2012

CNC machine, especially CNC milling machine, is the main production equipment in the industries of machinery, iron and steel, automobile manufacturing and so on. However, the errors are the main constraints to the processing quality and the precision measurement of CNC machine. Based on the multi-body system theory, the article models the error of Siemens CNC milling machine. In terms of the analysis of the error model, it is argued that the processing precision of CNC milling machine can be improved through controlling and compensating the error in the process of installation and manufacturing.
Research and Development of Scene Rendering in Interactive Virtual Exhibition
Authors: Lin Yi , Liu Yue
Published: January 2012

This paper analyzes the Virtual Engine platform “Virtools” and the theory of Multi-touch technology, explores the way to merge the behavior interactive module of Virtools and Multi-touch control mechanism, and proposes a resolution which integrates the virtual scene rendering and touch interaction. By creating the virtual scene of Dunhuang Mogao Grotto and combining the interactive advantage of Virtools when manipulating the 3D objects, the proposed system has created an immersive sensation of entering into the real environment. During the tour, the system will bring strong interests in Historical sites’ culture to its visitors. Implementation of the proposed system show that the researches on the virtual scene rendering and the integration of interactive technologies have achieved the desired effect.
Research of the Series Port Communicate System between PC and MCU Based on Wireless
Authors: An Xin , Li Ying
Published: January 2012

The paper introduces a Wireless Series Port Communication System between PC and MCU based on the wireless communication module. With the MSComm control technology and the VC++ platform, a PC-side communication software is developed. Hardware and software of MCU-side is also designed by setting serial communication protocols and working modes. The system has been applied in the wireless communication of Open Architecture CNC System successfully.
Comparative Study on Different Wire Breakage Codes of Towers
Authors: Lin Yi Wei , Meng Sui Min , Li Zhi Min , Yin Xiang Hui
Published: January 2012

Analysed three design standards on the combination of wire breakage load and the value of tension load over the past decade , According to 1M module of State Grid Tower "typical design-110kV transmission line volumes", selected a straight pole and a corner pole to carry out comparative studies, mainly calculated and analyzed the towers bending moments on the different standards or codes of wire breakage situation and wire breakage tension changes , discussed the change of safety factors of lines’ impact on the tower's bending moments; analyzed synthetically the changes of the pole actual bending moments and weight resulting from inequable ice-coating and other load combination; finally drew a conclusion that national standard increased the tower design standards, and project investment corresponding increased, then put forward reasonable proposals considering the security and economic aspects. Analysis and study are very meaningful and valuable to the different parts of towers calculation and checksum.
Research on Wireless Sensor Networks with Application
Authors: Tan Ding Zhong , Jing Nian Sheng , Liu Fu Qiang
Published: January 2012

Wireless sensor networks (WSNs) used for remote temperature monitoring is researched in this paper; the WSN is in multi-layered structure. The WSN node, the routing protocol which can choose the routing path adaptively, the data communication protocol and the data encryption technology for wireless transmission, WSN management and monitoring software are Researched and Realized. The WSN was deployed, tested, and running steadily, it proved that the protocol and node design are reasonable.
Reducing Safety-Critical Software Statistical Testing Cost Based on Importance Sampling Technique
Authors: Yan Jiong , Deng Chang Hong , Ji Meng Luo
Published: January 2012

Safety-critical software often includes some rarely executed critical operations that are often inadequately tested in statistical testing based reliability estimation. However, it is necessary to assess the reliability of safety-critical software to a high degree of confidence before it is deployed in the field. This paper discusses how to reduce safety-critical software statistical testing cost based on importance sampling technique. When both the critical operations and the entire software are adequately tested, the method can still compute the unbiased software reliability from the test results with much less test cases. Thus, the statistical testing cost of safety-critical software can be reduced effectively The simulated annealing algorithm for calculating optimum transition probabilities of the Markov chain usage model for reducing software statistical testing cost is also presented.
An Agile Process Model Based on the Third-Party Testing Agencies
Authors: Wang Yun Sheng , Wang Bo , Guo Jun , Zhang Bin , Wang Ji Na
Published: January 2012

This paper has analyzed the entire testing task sets of the third-party software testing agencies. And for how to set these tasks to the process of projects’ research and development, proposed a new Software Process Model, which is an evolution of the helix structure. The model was based on the ideas of agile. It may become the first one that assigns the testing task sets to the whole process of software development in an independent third party perspective. The agile process model in this paper is major for the heavyweight projects’ research and development. Currently, this agile process model which is based on the independent third party has been adopted in practice projects, and achieved good results.
Research on Low-Carbon Aesthetics Built up by Landscape Design
Authors: Zhang Jian , Sui Yan Hui
Published: January 2012

In view of wide attention to global climate change, “low carbon city” has been the greatest object for all cities in the world. Urban landscape is vital to urban construction and economical development. In this paper, it was researched how to guide people to develop low-carbon habits to achieve mitigation in the field of energy conservation through landscape design. The new method of urban low-carbon landscape design was studied from five aspects, including urban landscape patterns, green space, nightscape design, and so on. On the other hand, the low-carbon aesthetics should be built up through landscape design in order to construct an integrated theory system of landscape design for low carbon city.
Research on the Operation Mode of Planned Island and Partitioning Method
Authors: Dang Ke , Zhang Hui Ming , He Xin
Published: January 2012

The island operation is a new operating mode of the distribution network after the distributed generation is introduced. And it is a beneficial supplement for the operation of the distribution network. The distributed power supply capacity is made full use to ensure the safe operation of the maximum number of significant load when the fault occurs. A combinational algorithm of the planned island partition is presented according to the principle of power balance in the distribution network failure. Heuristic search strategy and the breadth-first search algorithm are adopted by taking into account the characteristics of different types of distributed power. The validity of the method is proved by the example.
Lab Scale Study on Synergistic Disinfection of WWTPS Secondary Effluent by Ultrasonic and Ozone
Authors: Wu Hao , Li Zi Fu , Jin Xin , Zhao Xin , Deng Fu Rong
Published: January 2012

Secondary effluent from WWTPS still contains a large number of microorganisms, therefore, disinfection is essential. There are many disadvantages in using traditional disinfection methods, so the combination of disinfection techniques is a new research direction. Ozone combined with ultrasound is one of them. In this experiment, the inactivation of the total coli forms, color removal and UV254 removal of secondary effluent by a combination of ultrasonic (frequency20 kHz; power100W) and ozone disinfection was investigated. The results show that the effect of the synergistic action of 30s US and ozone disinfection is superior to the effect of individual ozone disinfection. After 15min synergistic disinfection, the total coli forms inactivation rate is up to 99.9%, simultaneously color removal rate to 80% and UV254 removal rate to 52%. Compared with individual ozone disinfection, reaction time was reduced by 5 min.
Frequency Modulated Empirical Mode Decomposition Method
Authors: Zhang Xin , Du Xiu Li
Published: January 2012

Frequency modulation procedure is proposed to overcome the mode-mixing problem associated with the EMD method when processing signals with closely spaced frequencies. This procedure also provides the flexibility to start the realization of IMFs either from the high frequency end as does the original EMD or from the low frequency end when the signal contains unwanted high frequency components. The EMD procedure, under the circumstances, may behave as high pass, low pass or band pass/stop filters. The proposed method, assisted by the Hilbert-Huang transform on the governing equations, identifies the instantaneous stiffness and damping coefficients as functions of vibration amplitude of a nonlinear system. The effectiveness of the proposed method is verified by numerical simulation.
Analysis of Bridge Earthquake Damage and Reasonable Aseismic Systems
Authors: Xia Xiu Shen , Chen Xing Chong , Li Xiao Yang
Published: January 2012

Damage to simple beam bridge, continuous beam bridge, continuous rigid frame bridge and arch bridge is analyzed in Wenchuan, Tangshan and Yunnan earthquakes etc. The results show that seismic damage for the same bridge system has many common features, and seismic performance of different bridge system varies greatly. Fall, bearing sliding, beam displacement and collision between adjacent beams at expansion joints the is major earthquake damage for simply beam bridge. Seismic damage ratio and degree of continuous beam bridge is bigger than the simple support beam bridge. Earthquake damage of the continuous rigid frame bridge is obvious lightly in the close simple beam and continuous beam bridge. Seismic damage of arch bridge is more complex. Selection methods of reasonable aseismic system for the straight line bridge in seismic zone are proposed based on the analysis of earthquake damage and numerical analysis.
DEM for Modeling Cracks Propagation in Rocks under Uniaxial Compression Tests
Authors: Yu Tian Tang , Xia Sheng Xu
Published: January 2012

The Discrete Element Method (DEM) was used to simulate cracks propagate in rocks subjected to uniaxial compressive stress. A DEM code was developed, and used to simulate the response of the continuum materials to loading. Rock samples with two initial cracks inclined at varying angles were simulated with the DEM code. The results were compared with those obtained from laboratory samples, and it was observed that the two results were consistent. This suggests that the DEM is a robust technique for the visualization of secondary cracks formations and propagations in rocks.
A Research on the Interpolation Strategy of a Novel 3-DOF PKM Module
Authors: Chen Chuang , Wang Hui
Published: January 2012

A two-step interpolation algorithms for a newly developed parallel kinematic machine is investigated. In the rough interpolation stage, a point-vector blending method is implemented to solve the problem that the position and pose is coupling; in the fine interpolation stage, two different spline curves is compared for the choice of appropriate fine interpolation algorithm.. Nonlinear mapping between real and virtual space is analyzed and the nonlinear error is estimated. The calculation results show that PVT spline curve can satisfy the accuracy requirement of the A3 head in high-speed machining.
The Study of Vehicle Routing Model in Emergency Situations
Authors: Chen Ying Xin
Published: January 2012

A Vehicle routing model for logistics planning is developed in this paper. The model addresses the dynamic time-dependent transportation problem that needs to be solved repetitively at given time intervals during ongoing aid delivery. The model generates plans incorporating new requests for aid materials, new supplies and transportation means that become available during the current planning time horizon. The plan indicates the optimal mixed pick up and delivery schedules for vehicles within the considered planning time horizon as well as the optimal quantities and types of loads picked up and delivered on these routes. The mathematical model is a hybrid that integrates the multi-commodity network flow problem and the vehicle routing problem. Based on the analysis and calculation of an example, the results indicate that the model is effective and feasible.
Dynamics Modeling and Simulation of Tracked Five DOF Mobile Manipulator
Authors: Li Jian Jia , Zhao Xin Hua
Published: January 2012

The dynamical analysis for the tracked moving platform and the manipulator are established based on by Newton-Euler method and Dynamics model is respectively obtained, Moreover, Dynamic simulation is conducted, and reveals the input-output relation for the motion system from dynamical simulation, and plays a solid basic for the further study of dynamic modeling and motion control.
Kinematics Modeling and Simulation of Tracked Five DOF Mobile Manipulator
Authors: Li Jian Jia , Zhao Xin Hua
Published: January 2012

Based on the study of motion model for a tracked five DOF mobile manipulator in the ideal simulation, the motion characteristics are revealed. With system’s input-output relation be established from kinematics simulation, several basic rules are founded for dynamic modeling and motion control in the study of a tracked five DOF mobile manipulator.
Research of University Comprehensive Information System Based on Cloud Computing
Authors: Li Wei , Huang Hai Duan , Lu Jie , Tian Gang
Published: January 2012

The paper introduces the definition of cloud computing, characteristics and service mode. In view of the present situation of university information system construction, this paper presents a university comprehensive information system model based on cloud computing, which consists of infrastructure layer, business data processing layer, application system layer and customer service layer. The high effectiveness and advancement of information system model in infrastructure utilization ratio, information sharing degree, the security of data storage, software application mode etc are discussed.
An Empirical Indoor Propagation Model for Underground Parking Area
Authors: Zhu Shan , Wang Bang , Liu Wen Yu , Liang Hui
Published: January 2012

This paper presents an empirical indoor propagation model for underground parking area based on our extensive field measurements. Among several candidate empirical models, we choose the modified Keenan-Motley model for calibration, using channel power measurements at the 3G and 4G radio frequencies. Our calibration results can be used to provide a simple propagation model for wireless transmission planning, forecasting and quality control in indoor parking scenarios.
Relationship between Objective and Subjective Methods in Evaluating Static Discomfort of Car Driver Seat
Authors: Daruis D.D.I , Deros B.M. , Nor M.J.M. , Hosseini Fouladi M.
Published: January 2012

Objective method alone is insufficient in measuring discomfort of car seats. It is indirect and does not truly convey the perception and feeling of the sitter. A combination of both objective and subjective method gives better evaluation on discomfort. Seat pressure distribution method was adopted to investigate the static characteristic of a seat. The method was found to be statistically repeatable in measuring sitting of fourteen male subjects in static condition. Subjective discomfort through subjective assessment using a valid and reliable self-established questionnaire together with a body pressure map (BPM) showed increasing discomfort as sitting time increase; which is expected. The short term seat pressure distribution was used to be correlated with subjective assessment. Significant and moderate correlation was observed between four local body parts namely the seat pan bolster, thighs, upper back and lower back with overall seat average pressure BPM used in the subjective evaluation. Multiple linear regression model were established; overall discomfort from averaged pressure from BPM can be predicted from right & left buttock, right & left thigh and upper back & lower back. It was found that R-Sq=93.5%, R-Sq (adj) = 83.7% with moderately adequate predictive ability with predicted R-Sq= 46.77%.
Preparation of Manual-Controlled Injection Nano-Barium-Strontium Titanate Based on Glass Fiber Filter Enricher and its Application in Speciation Analysis of Chromium in Environmental Waters
Authors: Zhang Dong
Published: January 2012

A manual-controlled injection barium-strontium titanate based on glass fiber filter enricher(MIBSTE) was prepared, and its application in speciation of Cr(III) and Cr(VI) from water was studied. The optimum experimental parameters for preconcentration and separation of the Cr(III) and Cr(VI) have been investigated. The results showed that the BBST had adsorption capacity towards the Cr(III) and Cr(VI) at the different conditions. And two forms of chromium show different adsorption capacities at different pH values, Cr (III) could be adsorbed at pH ≥ 10, but Cr(VI) can’t be adsorbed. Whereas Cr (VI) retained at pH ≤ 2, but Cr(III) can’t be adsorbed. Therefore, it is possible that the two forms of chromium are complete separated. The Cr(III) and Cr(VI) could be completely eluted with 1 mol•L−1 HCl and 1 mol•L−1 NaOH, respectively. The chromium concentration was measured by atomic absorption spectroscopy. A new method for determination of the speciation of chromium in environmental water samples based on the manual-controlled injection enricher and atomic absorption spectroscopy determination was proposed. The method was successfully applied for the determination of Cr(III) and Cr(VI) in environmental waters with satisfactory results.
Dynamic Analysis Based on ANSYS of Turning and Grinding Compound Machine Spindle Box
Authors: Shu Zhan Hui , Han Qiu Shi
Published: January 2012

With constant development of machine tools toward the direction of high speed, high precision, high efficiency and high compound rapidly. The performance of high-speed machine tools is affected by the dynamic characteristic of machine tools in the very great degree. More and more attention is played to them and higher and higher demands are proposed. Finite element method is a kind of fast and efficient auxiliary tools in modern engineering analysis and design. Three-dimensional finite element model of spindle box is established in this paper based on large finite element analysis software ANSYS. Through modal analysis, the first five order natural frequency, vibration mode and various order vibrating modal characteristics are obtained. These results are verified by using the method of experimental modal. Harmonic response analysis is carried after doing modal analysis on spindle box. Response and stress under different frequency are obtained. Continuous dynamic characteristics are forecasted.
Research on Machining Distortion due to Residual Stresses of Large Monolithic Beam
Authors: Wang Yun Qiao , Mei Zhong Yi , Fan Yu Qing
Published: January 2012

Machining-induced distortion of large monolithic parts with thin walled structures creates problems in aircraft manufacturing industry. Typical monolithic beams of airframe are machined by NC machine and machining distortions are recorded. Thin walled structures are prone to distortions and dimensional instabilities due to internal stresses; therefore, stress-relieved vibration method is applied to reduce the internal stresses in blank material and results in better machining performance and dimension stability. But vibration stress-relief method doesn’t work always due to unknown reasons. Machining simulations in ANSYS are performed to predict the residual stress-induced machining distortion and simulation result is compared with the machining measurements to validate the simulation process. Cutting simulations have been executed by the element deactivation technique after developing the initial residual stresses via sequential coupled field analysis. The possibility of residual stress being relieved more reasonably and less distortion by optimized machining sequence through simulation is discussed.
An Image Mosaic Method Based on SIFT Feature Matching
Authors: Cao Li Jing , Lv Ming
Published: January 2012

This paper concerns the problem of image mosaic. An image matching method based on SIFT features and an image blending method of improved Hat function are proposed in the paper. SIFT feature is local feature and keeps invariant to scale zoom, rotation and illumination. It is also insensitive to noise, view point changing and so on. Because of this our method is insensitive to orientation, scale and illumination of input images, so it’s possible to accomplish image mosaic between arbitrary matching images and the Hat function blending algorithm with global intensity revise makes the mosaic image accepted by human eyes.
A New Algorithm to Exposing Image Forgeries by Detecting Ambient Illumination Consistency
Authors: Zhong Wei Dong , Zhu Jun Jie , Wei Li Xian , Yang Xiao Yuan
Published: January 2012

Illumination consistency makes one of important roles in image authenticity, especially in splicing and copy-move rendering. This paper proposes a new method to estimate illuminant direction based on idea of binary sort tree. The algorithm calculates the least error function to structure the binary tree of illuminant direction. And it doesn’t need to expand much time to solve pathosis equation and access accuracy is improved. The experiment shows that, the algorithm can effectively calculate the light source direction of different objects and backgrounds in an image especially in infinite light source, and the detection correct rate reaches 85.4% in general situation , what’s more, 88.1% in infinite light source. Anyway, the algorithm in this paper is a great advancement of blind forensics based on consistency in lighting direction.
On Capacity of 60GHz TH-PPM Systems in Frequency Selective Fading Channels
Authors: Li Na , Zhang Hao , Wang Jing Jing , Aaron Gulliver T.
Published: January 2012

Two pulse waveforms are designed and analyzed for 60GHz pulse modulation systems. An indoor frequency selective fading channel model is introduced for single user 60GHz TH-PPM systems. The capacity with this channel model of a 60GHz TH-PPM system based on the designed pulses is derived. Performance results are presented to illustrate the effects of the pulse waveforms and channel properties on the channel capacity.
Deep-Hole Drilling in Stainless Steel with Small Diameter Twist Drills
Authors: Petuelli Gerhard , Nentwig Christoph
Published: January 2012

In this paper results of manufacturing tests are described done in order to evaluate the performances of twist drills of diameter d = 1.2 mm and 1.4 mm respectively, if boring into stainless steel X90CrMoV18 (1.4112). Deep-hole drilling was realized thus, that the depth of the bore hole was greater than 10 times the diameter of the twist drill (L/d >10). In order to reduce the impact on the environment caused by the coolant, it was found that minimum quantity lubrication (MQL) can be applied. Hence, the ecology of the mass production of perforated discs for the food processing industry can be improved. The performance of the several small diameter twist drills was determined and evaluated by, firstly, their deep-hole drilling capability, e.g. assessed by the variation or even increase of cutting forces with increasing depth and travel, whether the forces exceed a critical level due to poor chip extraction. In addition, the suitability to use or rather implement the different small diameter twist drills for high-speed cutting (HSC) and finally the individual tool service life for each investigated twist drill. This research project has shown that the accomplishable performance and operating time are strongly dependent on tool cutting material and the tool geometry, especially the size of the chip flutes of a twist drill, as well as the individual coating of the cutting tools.