bluuebunny/crossref_metadata_2025 huggingface dataset:
Based on the Method of Fuzzy Clustering Analysis of the Smartphone Product Market
Authors: Zheng Chao Xin , Ma Zhi Chao , Gao Zheng
Published: February 2012

With an increasingly competitive market and the homogenization of products, the cultivation and building of the competitiveness of enterprises depends largely on the obtaining information in the business marketing, in order to respond to changes of the environment of market.Firstly, this paper describes the basic principles of fuzzy clustering analysis.Secondly, it describes the general steps and related concepts. At last, it classifies five smartphone brands effectively through the use of fuzzy clustering analysis method to combine quantitative and qualitative market for smartphones. By the results, we obtain more realistic market conditions
Significance of Clinicopathology and Expression of Heat Shock Protein 72 in Human Primary Lung Carcinomas
Authors: Fang Yan , Wang Xiao Ping , Lin Huan Ping , Wang Qiao Xia
Published: February 2012

Heat shock protein 72 (HSP72) and glycoprotein 96 (gp96) are highly expressed in cancer tissues. Recent studies indicate the possible roles of HSP72 and gp96 in the development and progression of lung carcinomas but detailed information is still ambiguous. The aim of the study is to investigate the correlation between clinicopathology and immunolocalization of HSP72 and gp96 in human lung carcinoma. Immunohistochemistry demonstrated that HSP72 and gp96 expression in lung carcinomas with metastasis was significantly higher than those with non-metastasis. HSP72 and gp96 expression were significantly associated with the presence of tumor infiltration, lymph node and remote metastasis.
Study on Analysis and Evaluation of the Industry Competitiveness in Hebei Province
Authors: Zhao Yan Na
Published: February 2012

With the severe competition in the market, it is important for various areas economic development how to improve the competitiveness of industries.This paper analyses the industry competitiveness in Hebei Province by using the principle component analysis (PCA) method.Faced with the factors restricting industry development in Hebei Province ,this paper bring forward some countermeasures and suggestions
Wrist Wearable Physiological Signal Detection Equipment with Biochemical Materials
Authors: Chen Xing , Hou Hong Lun , Wu Ming Hui , Huo Mei Mei
Published: February 2012

This paper designed a wrist Device which can detect physiological information and save the information data. The information got by device is including Oxygen saturation of blood, Pulse rate and steps. And the device even can distinguish the state of human body between fall and normal activities with 3-axis accelerometer. The equipment designed for family health care and remote healthy care field. The operation of device is so easy to be mastered that the device might have a potential value for the future medical field
Study on Recast Phenomenon in Processing of Micro-Hole with Millisecond Laser
Authors: Wang Ke Dian , Duan Wen Qiang , Mei Xue Song , Wang Wen Jun
Published: February 2012

The experiments of micro-hole ablation are conducted firstly on titanium alloy Ti-6Al-4V with Nd: YAG millisecond laser. A significant factor which affects the depth of blind hole is found: the depth of recast material. This paper closely examines the regularity of recast depth varying with laser parameters, discovering that the ratio of recast depth to the entire hole depth decreases as pulse width decreases, and increases as peak power decreases. Verification experiment is conducted on stainless steel 1Cr13, eventually micro-hole with very thin recast layer is drilled when the maximum peak power and the minimum pulse width of the present millisecond laser are used.
Research on Automatic Programming Technology of Holes Processing Based on IGES
Authors: Zhao Shu Xing , Wang Ke Dian
Published: February 2012

IGES (Initial Graphics Exchange Standard) is a general graphics data exchange standard, which has been widely used for data exchange between different CAD/CAM systems. But the inherent defect of IGES makes it difficult to use in the field of automatic programming. This article focuses on the automatic programming of holes processing. Entities were labeled with different entity number, on which the hole entity could be distinguished and extracted based. The intersection lines of hole and NURBS surface could be calculated by NURBS surface intersection algorithm. The redundancy of intersecting lines is a key problem. This article gives an intuitive treatment.
A Research on the Key Technology of Real-Time Vibration Measurement Basing on Grid
Authors: Gao Ying , Zhang Hai Hua
Published: February 2012

This thesis combines the vibration measurement technology with the computer technology. We focus on the research of real-time vibration measurement key technology which is basing on the computing grid. This thesis gave details in collecting the real-time vibration data on sight, and automatically uploading the real-time data without making any mistakes. We handed out a analyze method for the vibration data basing on grid.
Knowledge Flow Modeling and Analysis in Supply Chain Based on Stochastic Petri Net
Authors: Li Xiao Zhong , Ding Yi Jie
Published: February 2012

Knowledge is an important resource providing competitive strategies for the firms. Managing knowledge through supply chain will bring more benefits to the businesses. Various factors during the process of knowledge flowing can cause different time delay. In order to analyze the problem of time delay of knowledge flow in supply chain, the knowledge flow model in supply chain based on stochastic Petri net is proposed and corresponding isomorphic Markov chain is given. The time performance and the efficiency of knowledge flow Petri net model are discussed. The proposed method can help the firm with the knowledge flow management and reorganization
A Study on Risk System of Water Conservancy and Hydropower Engineering
Authors: Zhang Hong Yuan , Liu Ying Hong
Published: February 2012

Water conservancy and hydropower projects are the important parts of national capital construction. Since the reform and opening up, it has been 30 years,construction trade develops fast and the construction market takes initial shape.Butwith the constant development of the reform and opening up and national economy,higher request is put forward in construction engineering and construction trade, withmany characteristics of large investment, long time, high construction difficulty, complicated technology and engineering participants in water conservancy and hydropower construction project, and many unforeseen factors occur in construction process. The engineering project is a high-risk construction process, and participants of engineering construction face all kinds of risks inevitably, so if we do not guard against it, this will cause the engineering construction not to go on smoothly, even cause serious consequences. Therefore, the risk management of engineering project is particularly important. To study the risk of construction projects, and to strengthen the risk management of construction engineering project, which can adapt to the objective demand of international construction market, and are good for national capital construction and national economic development.
Preliminary Analysis of Thorax CT Image Pre-Processing and 3D Modeling of Patients with Pectus Excavatum
Authors: Tang Bo , Jiang Li
Published: February 2012

Pectus excavatum is the most common congenital chest wall deformity. Extensive corrective surgery prior to age 3 may disturb chest wall growth and result in a constricted thorax. We paid particular attention to the role of thoracic spiral computed tomography (CT) image and 3D 1modeling of patient with pectus excavatum. Thoracic spiral CT was always performed on patient who had developed restrictive chest walls following pectus excavatum surgery. These patients then underwent a Nuss operation to elevate the sternum and attempt to correct their restrictive chest wall defects. The method used the CT image to set up 3D modeling reconstruction defined the orientation of the ribs and costal cartilages and their relationship to the sternum, allowing exact preoperative measurement of the bony rib cage and guiding individualized operative correction. It also has laid foundation for simulation of Nuss operative correction of pectus excavatum and has important reference value in selecting and positioning of support frame. As was shown in the result, the accuracy of costal cartilage’s model was promoted in certain extent. Manual work of model modification was significantly reduced and the period of 3D modeling was shortened by approximately 40%. The 3D modeling of spiral CT data is useful in both preoperative and postoperative evaluation.
Design of Double SDRAM Controller for Multibus Ground-Based Test Equipment
Authors: Li Qi , Liu Yan Fei , Yang Tie Qian
Published: February 2012

A double Synchronous Dynamic Random Access Memory controller based on ping-pong operation as the data buffer is designed to meet the requirement of large data amount and high transmission speed for multibus ground-based test equipment of a certain missile system. The design scheme which use FPGA as the main controller is presented in detail, including the internal interface of SDRAM, processings of data transmission and realization of ping-pong operation. The function of this controller is validated through the picked images from image generator, and the result shows that it can write and read data at the steady rate of 125Mbit/s, which indicate this SDRAM controller is feasible for the multibus ground-based test equipment
Dam Deformation Monitoring and Data Analysis Based on Cloud Model
Authors: Wang Teng Jun , Yang Bo , Yang Hai Yan
Published: February 2012

Dam deformation monitoring plays an important role in order to ensure the safety of dam operation, to improve project efficiency and the level of design and construction. Reliable monitoring method and scientific data analysis is the best protection for control the deformation law. Mathematical methods have been used to precisely quantitative analysis the deformation of the dam monitoring points. Usually, when assess the stability of deformation and evaluate the monitored data, qualitative languages are used to analyze qualitative result. The article combines cloud model with reliable monitoring data of Xiaolangdi to try to make qualitative analysis result quantitatively, and the quantitative analysis result can verify the qualitative analysis conclusion. It has realized the change between those two analyses. Also, utilize cloud model to analyzing deformation monitoring data is verified reliable.
Optimal Guidance Law Design for Reentry Vehicles with Terminal Velocity and Angle Constraints
Authors: Xie Dao Cheng , Wang Zhong Wei
Published: February 2012

To achieve better impact effect, impact point error is of first importance, terminal velocity and angle of reentry vehicle are also needed to satisfy the expected value. This paper investigates the optimal guidance law for reentry vehicle. Guidance equation is expressed in longitudinal and lateral plane respectively, needed guidance command of angle of attack and sideslip angle is generated. Guidance command of angle of attack and sideslip angle is appended when considering reentry velocity. Synthesized guidance command is the sum of needed guidance command and appended guidance command. Effect of attitude control for reentry vehicle is analyzed using optimal guidance; the attitude of vehicle is stable and is guided to target point precisely. Trendline of landing error, reentry velocity and terminal angle varying with reentry time are analyzed, simulation results show that optimal guidance law is proper and satisfies the demand of impact point error, terminal velocity and angle.
Curvature Tensor under the Yamabe Flow
Authors: Shen Jing Fang , Yang Jia Jun , Xi Neng
Published: February 2012

Yamabe flow, curvature, tensor, compact. Abstract. This paper focuses a compact Riemannian manifold Mn evolving under the Yamabe flow and proves that if the Ricci curvature is uniformly bounded under the flow for all times that t from 0 to T and the injectivity radius is bounded below at each time slice, then the curvature tensor is uniformly bounded.
Design of Vehicle Weigh-in-Motion System Based on Neural Network
Authors: Cheng Cheng
Published: February 2012

In order to improve the dynamical respond of the weighing sensor and to meet the demand of rapid weigh-in-motion(WIM), a new adaptive weighing system is introduced. The system consists of sensors, data processing module, control module and interface circuit. For restraining the influence of vehicle speed and vehicle liberation, the system adopts self-adaptive variable step size LMS algorithm based on neural network to filter out the noise of WIM signal. Based on this method of signal processing, a vehicle WIM system based on neural network self adaptive filtering was designed. The experimental results proved that the neural network based method can be used to reduce the weighing time and increase the accuracy simultaneously.
A Study on Duration – Cost Information System of Water Conservancy and Hydropower Engineering
Authors: Zhang Hong Yuan , Liu Ying Hong
Published: February 2012

Nowadays, excellent software tools have been offered to project management along with fast development of computer technique, among which PROJECT is the excellent application software for project management in MICROSOFT Company, which can fully adapt to and meet requirements of the whole process for project management. In this thesis, problems and disadvantages existing in project management of current water conservancy and hydropower engineering are analyzed; concrete practices are conducted by applying PROJECT software in danger-removing and reinforcing projects of Qianjin Reservoir in Huadian City, Jilin Province and positive publicity value of PROJECT software in project management is demonstrated based on the accumulation of managerial experience of water conservancy and hydropower engineering
The Design and Realization of the Map Decoration and Cartography System Based on ArcEngine
Authors: Xu Wen Kun , Zhao Shao Jie , Xin Quan Bo , Jiao Han Ke
Published: February 2012

This paper designs and realizes a system based on ArcEngine. The map decoration and cartography function is essential to the geographic information system (GIS), with the development of GIS, it puts forward some new requirements for map decoration and cartography. This paper introduces the overall process of the project’s design and the realization main function of the independent development package map decoration and cartography system. Compared with the traditional map, the new development system which is based on ArcEngine component has good flexibility and expansibility. It can satisfy demands of different departments to map decoration and cartography system, and realize a good effect to map decoration and cartography
UV LEDs with Low Dislocation GaN Buffer Layers Grown by MOCVD
Authors: Yarn Kao Feng , Chang Wen Chung , Hsieh I Ting
Published: February 2012

New MOCVD grown UV (ultra-violet) LEDs using low dislocation density GaN buffer layers on sapphire have been studied. Two different LED characteristics of GaN substrates, i.e. 5um-thick and 20um-thick buffer layers, on sapphire are compared with each other. The enhanced LED characteristics show ~29.5% reduction in current-voltage resistance, ~8.5% reduction in turn-on voltage and output power saturation at higher current. Better GaN buffer quality and heat dissipation due to the lower defect density are believed to the enhanced reason.
Fusion Fingerprint and Face Multi-Biometrics Recognition Based on D-S Evidence Theory
Authors: Wang Feng
Published: February 2012

Single biometric feature has not meet people's needs. After analyzing fingerprints and face recognition technology, a fused theory is proposed which comprise fingerprints and face multi-biometrics features recognition based on D-S evidence theory. This article first analysis main part of the Face and Fingerprint Identification System, then gives a decision-making on integration in the face and fingerprint recognition method. In this paper we divide minutia features of fingerprint into certain and uncertain region which could make the performance of verification in certain region better than the original performance. By this fusion strategy the whole performance is improved.
Ultrasonic Water Level Measurement System Based on GPS
Authors: Li Gu Yu , Zhu Wei , Wang Xian Cheng
Published: February 2012

An Ultrasonic water level measurement system based on GPS is presented. According to the ultrasonic principle and GPS positioning technology, the secondary ultrasonic reflection in the air and the time spent in the liquid are measured to calculate the height of the water level and the depth of the liquid. The temperature compensation circuit is designed to improve the measurement precision. The use of GPS, the specific location of measurement points can be got, and the key position multi-point level measurement, cycle monitoring, real-time monitoring and mobile monitoring can be achieved
Iris Feature Extraction and Matching Based on Space Pyramid
Authors: Peng Wei , Yang Qun Ying , Gu Song
Published: February 2012

Iris feature extraction and classifier design are the key steps in iris recognition system, because it will directly affect the effect of iris recognition, especially for real-time iris recognition system, in order to extract enough information as possible while reducing the system Calculation, and find a balance between effectiveness and efficiency in the identification. the current proposed Gobor Dougman filtering is the main feature extraction. However, in the kinds of embedded systems, Gobor function need large amount of calculation, so this chapter put the pyramid matching classification in scenes into feature extraction, established a new model of feature extraction and recognition. The match effect is ideal in after large number of tests
The Research on Multi-Axes Automatic Motion Control Systems
Authors: Hu Lian Jun , Zeng Xiao Hui , Chen Gui Xu , Song Hong
Published: February 2012

An automatic control system for multi-axes motions based on multi-CPU embedded systems is proposed in the paper, in order to overcome insufficiencies of available multi-axes automatic dispensing control systems. It is shown from experimental results that expected control objectives for multi-axes motions are achieved.
The Energy-Saving and Emission Reduction Generation Dispatching Based on Particle Swarm Optimization
Authors: Li Yong Hua , Wang Jun , Yan Wei Ping
Published: February 2012

Energy-saving and emission reduction is the based policy of China. Energy-saving dispatching is a new generation optimized method combined with the aim of energy-saving and emission reduction. At present, the trial energy-saving dispatching in some area evaluate energy-saving and emission reduction of coal combustion power generation according to power supply coal consumption rate only. But the power supply coal consumption rate can’t overall reflect the energy-saving and emission reduction effect of coal combustion power plant. This paper selects the power supply coal consumption rate, auxiliary power ratio, SO2 and NOx emission, EAF, net loss and water consumption as the energy-saving dispatching index, adopts particle swarm optimization method, carries the order integrate index, provides the reference for energy-saving dispatching.
Prediction of the Effective Elastic Moduli of the Nanoparticle-Reinforced Polymer Matrix Composites Considering Interface Effects
Authors: Xu Jia Chu , Zhang Zong Fu , Lin Jie
Published: February 2012

Based on the analysis of the interaction of the nano-particles and the matrix interface layer, assuming when the elastic properties of the interface layer change the total energy difference arising from it transfer to the nanoparticle surface, the effective elastic moduli of the nanoparticles with interface equilibrium can be obtained. Using the traditional continuum micromechanics approach, the effective modulus tensor and effective elastic moduli of spherical nanoparticles reinforced polymer matrix composite considering the interface layer effects of nanoparticles – matrix is predicted, and the effects of the volume fraction (mass fraction), the average particle size of nanoparticles and interface layer structural parameters and elastic properties to effective elastic moduli of composite materials is discussed
The FEM Analysis on the Damage of Wing Leading Edge under Hail Impact
Authors: Zhang Xiao Qing , Liu Xuan , Yao Xiao Hu
Published: February 2012

The low and medium speed impact damage of composite structure of wing leading edge under hail impact is examined by numerical simulations, using nonlinear dynamic finite element analysis software LS-DYNA. For different impact velocities, the dynamic responses of wing leading edge are obtained and the damage in composite panel is clearly demonstrated. The relations of impact energy, maximum displacement and the damage state are analyzed. The simulation results can provide some references for the design of wing leading edge.
A Study on the Application Feasibility of Raw Ice and Snow Materials in Cold Area: Urban Landscape Materials in Harbin as an Example
Authors: Zhang Lei
Published: February 2012

The aim of this research on the application feasibility of raw materials of ice and snow in cold area is to find out the relationships among the ecology, sustainability and the urban landscape, and to put forward the universal application feasibility on landscape in cold area. Firstly, this paper first use urban centers of Harbin as the research object to analyse the climatic zones, geography, the distance between ice source location and mining ice location. Secondly, the application feasibility conditions of the cold raw materials, ice and snow, in Harbin urban landscape design is proposed and the application conclusions is drawn. At the same time, the universal application feasibility conditions of the cold raw materials, ice and snow, in urban landscape are established for the research of principles and methods.
A Study on the Preparation of Activated Carbon from Hydrolytic Lignin
Authors: Xue Jing Wen , Wang Zhe
Published: February 2012

Activated carbon from hydrolytic lignin was prepared in microwave activated with ZnCl2. The property of activated carbon was determined. Iodine and methylene blue adsorption were 1060mg/g and 99.98mg/g, respectively. The adsorption property of activated carbon on Cr(VI) was determined and results showed that pH and temperature had little effects on adsorption of activated, and the proper adsorbing time was 5-20min. The adsorbing ability of hydrolytic lignin activated carbon was batter than that of commercial product. 1g of activated carbon could adsorb 25mg Cr(VI).
Mesh Mapping of Large Deployable Reflector in Mechanical - Electromagnetic Analyses
Authors: Chen Mei , Zheng Fei , Li Na
Published: February 2012

Ultra lightweight large deployable reflector antenna is gradually used nowadays in space applications. Both lightweight structures and materials are used. The relationship between the structure design and the electromagnetic performances is much tighter than other ground electric devices. This paper presents a mesh mapping method of large deployable reflector in mechanical - electromagnetic analyses. By using this method, the mechanical deformations can be precisely transformed on the electromagnetic model. It can be used to understand the relationship between the mechanical deformations and the electromagnetic performances on such a huge, complex structure.
The Asp Flooding Scaling Mechanism in Daqing Oilfield
Authors: Jing Guo Lin , Tang Shan , Xu Ji Xi , Peng Yong Zhen , Wang Huai Yuan
Published: February 2012

In the process of development in the oilﬁeld, scale has been produced. Thus laboratory-scale deposition tests have been used to understand scale deposition mechanism. The process, mechanism and the main type of the scale in Asp flooding well of the forth plant of the Daqing oilﬁeld were analyzed. To investigate the concentration change of the ions in the formation water with the injection of the Asp complex liquid and the scaling mechanism in the process of Asp flooding the core dissolution test was carried. Some of the scale samples were characterized by scanning electron microscope (SEM), and the results of the element analysis were investigated.
Fuzzy Control for Variable Cooling Water Flow System
Authors: Yang Jin Ming
Published: February 2012

The variable flow cooling water system can achieve energy saving benefits just like variable primary flow chilled water system for central air conditioning system. How to design the control system with appropriate control algorithms and control strategies is particularly important. We can clarify the basic control principle of variable cooling water flow technology based on the analysis on DOF (degree of freedom) of cooling water systems, it is important for control system design. The article pointed out explicitly that the realization of variable flow technology for cooling water system must construct two control loops, one for cooling water supply temperature the other for return temperature, further more discussed control strategies for two control loops. In the end the article illustrated the synchronous frequency conversion technology for multiple cooling water pumps system to avoid overload when part of pumps put in operation
A DNA-PID Controller for an Industry Robot
Authors: Ding Du Kun , Li Long Gen , Xie Cun Xi , Zhang Tie
Published: February 2012

In this paper, a DNA-PID controller is proposed for a 6-DOF robot. The experimental robot system has firstly been setup. Then the PID controllers of the robot joints are designed. Due to DNA algorithm’s excellent computing characteristics, it is researched and used to set the PID parameters on line, which are the proportional coefficient, the integral coefficient and the differential coefficient. To test the controllers, several experiments are performed. The computer simulation results show that the DNA-PID controllers have faster respond speed and less overshot, which can meet the need of robot control
Compressed Sensing Research on Barn Temperature
Authors: Fu Hong Liang , Tao Hua Wei , Luo Zheng
Published: February 2012

That compressed sensing is used in online monitoring of stored grain information could reduce the mass of information storage space and transmission bandwidth. However, due to the question that compressed sensing reconstructed error may cause decision-end to make wrong decision, a limited feedback error controlling method is proposed, wrong decision-making caused by reconstruction error is solved through feedback a small number of critical data. Numerical experiments on barn temperature shows that this method, on the basis of costing a small amount of compression ratio, can effectively improve the quality of reconstructed signal.
The Growth Process of the PEO Films under Escalating Voltage Waveform (II)
Authors: Wang Li , Fu Wen , Chen Li
Published: February 2012

In order to get a clear picture for describing the growth process of plasma electrolytic oxidation coatings under escalating voltage waveform, the composition, the concentration of the dissolved Mg2+ of PEO coatings formed at different reaction stages were investigated. The voltage-current characteristics during the PEO process were also discussed.
Research of CO2 Emission of Residential Buildings in Zhejiang Province Based on Life Cycle Assessment
Authors: Zhou Xiao , Ge Jian , Yan Yan
Published: February 2012

The database and framework of CO2 emission evaluation of residential buildings in Zhejiang province based on life cycle assessment (LCA) are set to quantify CO2 emission of residential buildings. A typical case of residential buildings in Hangzhou was analyzed to evaluate CO2 emission in each phase of building life cycle. This research not only provides a method that can calculate CO2 emission of residential buildings, but also provides an effective suggestion to choose appropriate energy saving and CO2 reduction strategy.
Design of Gateway for Farmland Water Potential Soft-Sensing Network for the Collection of Crop Micro-Environment Information
Authors: Tian Li Guo , Li Meng , Liu Yue , Lu Sheng Li , Chen Zhi Liang
Published: February 2012

The farmland water potential (FWP) soft-sensing network is responsible for the collection of crop micro-environment information and overall estimates the value of FWP. It is made up of an embedded gateway and several wireless micro-environment information acquisition nodes. According to the data transmission requirements of FWP soft-sensing network, the gateway can be able to complete the data transmission between data acquisition nodes and the remote monitoring center. It employed wireless router module CC2530 and Wi-Fi module as well as the processor S3C6410 as core parts, and built the hardware system; also the gateway built software system through the embedded Linux operating system, and wrote a suitable communication protocol so as to achieve connectivity between WSN and Ethernet. In practical application, the gateway works well
Design of CO2 Collection Node Based on ZigBee
Authors: Chen Zhi Liang , Tian Li Guo , Li Meng , Liu Yue , Zhang Jie Ping
Published: February 2012

Precision agriculture relies upon the acquisition and processing of agricultural foundation information initially. One of important techniques of realizing it is the remote wireless low power consumption data collection. This paper employed the ZigBee wireless sensor network technology as well as AVR Atmega8L single-chip microcomputer and RF transceiver CC2530 as core parts, and eventually designed a wireless sensor network node for agriculture information collection. The node can accurately detect the concentration of CO2 in real time. Experiments show that the node works well, collects the data effectively and meets the design requirements
Research of a De-Noising Algorithm Based on Sliding Window
Authors: Yang Wen Chuan , Song Ying Hua , Gou Ting Xi
Published: February 2012

Top-quality and efficient service increases in importance in the telecom service. One of its challenging issues is to deal with the atypical incidents. While the traditional mining algorithms are focus on the high-frequent item sets, a de-noising algorithm related to the atypical incidents still remains unsettled. This paper proposed a de-noising model based on the sliding window. In this model, FP-tree and multi-association rules are introduced to fix the thresholds of the sliding window. Experimental results demonstrate that the proposed algorithm can apply an appropriate data set to the knowledge discovery of the atypical incidents
Robust Stabilization of Uncertain Stochastic Systems with Delay in Control Input
Authors: Wang Cheng
Published: February 2012

This paper discusses the problems of robust stabilization of stochastic systems with parametric uncertainties and time delay in control input. The parametric uncertainties which appear in all system matrices are assumed to be norm bounded. The delay-dependent stabilization condition is derived by taking the relationships between terms in the Leibniz-Newton formula into account. Free-weighting matrices are employed to express these relationship, and the sufficient stabilization condition is formulated in terms of linear matrix inequality (LMI) based on the Lyapunov-Krasovskii theory, which can be solved by LMI toolbox in Matlab
The Experimental Research on the Vertical and Horizontal Bearing Capacity of Hollow Latticed Steel Columns
Authors: Shi Lu Yan , Li Zhen Bao , Zhang Zhi Yu
Published: February 2012

The paper researched on the strain, the deformation and the failure mode of hollow latticed steel columns through two experimental conditions. They were respectively about the vertical load and the horizontal load. The results showed that for the hollow latticed steel columns with upper columns, because of the stiffness of upper columns was obviously higher than the lower ones’, the upper columns were destroyed earliest under the vertical load. In addition, the columns had good horizontal bearing and deformation capacity, and the gravity second-order effects were not obvious for the columns.
An Automatic Focusing Algorithm Based on Blur Edge Width Detection in the Image
Authors: Zhang Fa Quan , Liu Xin Yu , Wang Guo Fu , Ye Jin Cai
Published: February 2012

An automatic focusing algorithm through detecting blur edge width via wavelet transform was proposed. To improve computation speed and fit for different scenes, the center area of the image and four golden points were selected as the focusing area. Wavelet module values of the focusing area were obtained through wavelet transform. The threshold to determine blur edge was selected by 50 percent of the wavelet module maximum in all wavelet module values. According to the threshold, the binary image of the blur edge was achieved. Area and girth of the blur edge were calculated respectively, and blur edge width was computed by area and girth. The control center computed steps according to blur edge width to adjust the lens, and the focusing motor operated corresponding steps received from the control center. Therefore, an automatic focusing procedure was implemented. Results show that the automatic focusing algorithm is quick and effective.
Performance Analysis of Anaerobic/Anoxic/Oxic (A/A/O) Process Municipal WWTPs
Authors: Jiang Deng Ling , Ni Guo Wei , Jia Jing Li
Published: February 2012

Anaerobic/Anoxic/Oxic (A/A/O) process is applied widely in municipal wastewater treatmen plants, which attribute to good perfromance for nutrient removal. However the design parameter of A/A/O process is mainly from experiments based on stable flow rate. So performance parameter of any WWTP must be modified according to actual conditions. Othewise, peformance efficiency of the WWTP can not meet initial design properties and it maybe result in serious energy waste. According to the experiences of start-up, commissioning, operation control and performance test of Anaerobic/Anoxic/Oxic (A/A/O) process in wastewater treatment plant (WWTP), the notions on successful start-up and effective operation are summarized and analyzed. The countermeasures on the variety of influent, the control of DO and sludge system to keep WWTP operating economically and stably are presented.
Applications of Light Guide Lighting Technology in Tunnel Lighting
Authors: Xu Jing Feng , Zong De Xin , Yin Yi Hua
Published: February 2012

As a new lighting technology, light guide lighting technology has been paid more attention and applied in the indoor lighting widely. However, it is rarely applied to tunnel lighting recently. This paper analyzes the characteristics of light guide lighting system and tunnel lighting, and discusses the feasibility of application of light guide lighting technology in tunnel lighting. Finally, it proposes some light guide lighting technologies suitable for tunnel lighting, and provides the ideas and references to application and promotion of light guide lighting technology in tunnel lighting in the future.
Wavelet Face Recognition Using Bayesian Classifier
Authors: Niu Li Ping , Yan Shi Tao
Published: February 2012

A novel wavelet face recognition using Bayesian classifier technique is presented. Wavelet-based and 2DLDA method have to down sample the original image dataset. In the preprocessing stage, the system uses 2DLDA to select the N top-ranked candidate images but forges making the final choice among those candidates, secondly all the candidate images are decomposed by applying wavelet transform, Bayesian recognition is parallel processed using these sub-band images. Final decision is made by use of weighed average. Our experiments on FERET have shown the effectiveness of the method.
Concreting Control Technology of Mass Foundation Slab
Authors: Li Da Hua
Published: February 2012

We analyze the unfavorable factors of mass foundation slab construction during high temperature climate and list the key points of quality control of construction. Then we lay down safe and reasonable temperature control scheme on the basis of selection of concrete material, optimization of mix proportion and theoretical calculation of temperature field. Finally, the constructors carry out the scheme strictly to prevent the temperature crack of mass concrete block and the construction quality is ensured.
Design and Construction of High-Formwork and Large Span Formwork Supports System
Authors: Li Da Hua , Wang An Hui , Chen Yan Mei
Published: February 2012

Taking Hefei Grand Theatre as an example, this paper discussed the relevant issues in big supporting system for template design and construction. It analyzed bearing capacity checking and the force checking of the main bar. It elaborated the main points in construction of template supporting system. Practice has proved that the design of high-modulus. Long-span template supporting system for the project is feasible. The implementation of the program not only reached the design requirements, but also ensured the construction quality, safety and construction period.
Seismic Response Analysis of Cable-Stayed Bridge Tower which Does Not Consider the Pile-Soil Interaction (II)
Authors: Zhang Li Na , Li Feng Chen , Yang Ou , Wang Cai Hua , Wang Jin
Published: February 2012

For the problem of analysis of earthquake response of cable-stayed tower bridge, the foundation is given as the rigid consolidation, do not consider the interaction of soil and structure, the finite element software ABAQUS is used for seismic response analysis. Taking the TCU052 and EI Centro wave which have different characteristics as the input of bridge tower, first to carry out the modal analysis of bridge tower structure, get various order of modal frequency of the bridge tower, then analyses the displacement response of the top of bridge tower in the bridge direction, the results showed that, under the pulse type seismic action the displacement response of bridge tower of large span cable-stayed bridge are increased.
Study on the Drilling Formation Selection and Risk Analysis of the Directional Drilling
Authors: Wu Ying , Zhang Peng , Li Xiao
Published: February 2012

Directional drilling technology is an important and very promising trenchless pipeline crossing technology. On the basis of the related literature research at home and abroad and our pipeline construction site investigation, focuses on several common soil properties are introduced, and then the formation adaptability of directional drilling is analyzed. The drilling selection methods are made when drilling in the specific geological conditions, and the possible risks of the construction process have been classified in the directional drilling.
Map Building in Indoor Environment for Service Robot Based on Laser Sensor
Authors: Wu Long Hui , Cui Shi Gang , Zhao Li
Published: February 2012

Map building is an essential problem in the field of mobile robot research. The accurate environmental map provides the important safeguard for the robot autonomous navigation and localization. In this paper, the two-dimensional environment map based on geometric features information was built by laser data when service robot worked in indoor structured environment. However, this article focused on analyzing the method of line fitting in the process of building local map and the method of global map updating. The experiment indicated that this method has the high accuracy and effectiveness, also reduces error caused by the uncertain information in the process of map building, which makes the indoor environment map update in real time.
The Key Technology Research for the Microscopic Particles Image Analysis
Authors: Sun Hui , Wang Yu Zeng , Li Ya Lin
Published: February 2012

According to the uneven illumination or the very complex background cases, global threshold value method can't correctly to binary particle image; this paper puts forward a kind of background correction method and the OTSU for particle image binary method. It's used background correction method to eliminate the influence of uneven illumination, and the OTSU for binary particle image. Combining with the above methods are tested, and the result shows that, after the background is corrected, we segment the background brightness particle image; the OTSU can obtain ideal image segmentation effect.
Experimental Study on Axial Compression of FRP Confined Concrete Column
Authors: Han Yang Yang , Zhang Hao , Li Ya Qin , Yao Jia , Hu Xiao Ping
Published: February 2012

Abstract: Concrete members strengthened by fiber reinforced polymer (FRP) are increasingly becoming a popular retrofit technique in recent years due to the excellent material properties, convenient and easy construction methods, and outstanding strengthening effect. However, fundamental researches are incomplete; especially the characteristics research of square cross-section of FRP confined concrete has become a major obstacle for the development of further research and application. Therefore, the better understanding of the behavior of confined concrete becomes of paramount importance. A total of 10 concrete columns, which were reinforced with CFRP (carbon fiber reinforced polymer) and with filleted square sections, were fabricated and tested subjected to axial load to investigate the mechanical properties of FRP confined concrete. The mechanical behavior of FRP confined concrete has been further understood and some useful conclusions are obtained.
Study of Magnetic Levitation Spherical Reluctance Driving Joint with Inverse System Decoupling Control
Authors: Zeng Li , Zhang Fan , Zhang Dan
Published: February 2012

This paper presents a new magnetic levitation spherical reluctance driving joint. It analyses the theory of air-gap magnetic of the driving joint and the mechanism of the generation of the magnetic levitation force and electromagnetic torque which based on the principle of reluctance motor. The mathematical model and the inverse system decoupling model of the driving joint have been established. The decoupling linearization and the state feedback closed-loop control system have been achieved in this paper also. The research of the result of system simulation provides us the decoupling characteristic and the dynamic characteristic of the driving joint system.
Research on Carbon Emission Performance during Full Life Circle of Steel Structure Residence
Authors: Zhu Wei , Ying Xiao Yu
Published: February 2012

With respect to steel structure residential project by Hangxiao Steel Structure Co., Ltd. (shorted for HXSS), resource, energy consumption and the corresponding carbon dioxide emission data is calculated for each period in full life circle of building, i.e., building material production, construction, use, building dismantling, and is compared with regular practice model of similar buildings, and the influence on the environment by the construction of steel structure system. Through research, it's found that the steel structure residential building is prominently advantageous in energy consumption and carbon emission during the full life cycle.
Construction and Characteristics of Orthogonal Trivariate Multiwavelets with Finite Support
Authors: Hua De Lin , Liu Ruo Hui
Published: February 2012

Materials science also deals with fundamental properties and characteristics of materi- als.In this paper, the notion of orthogonal vector-valued wavelets is introduced. A new method for constructing associated multiwavelets from multi-scaling functions is presented which is simple for computation. A necessary and sufficient condition on the existence of orthogonal vector-valued wavelets is presented by using paraunitary vector filter bank theory, time-frequency analysis method and matrix theory. A new method for constructing a class of orthogonal finitectly supported vector-valued wavelets is presented.
A Virtual Plant System for Control System and Automation
Authors: Zheng Yu Huang
Published: February 2012

This paper presents a virtual plant system, which is employed in the teaching process of the BTEC course of Control System and Automation. This system simulates different physical plants and demonstrates that experiments based on the virtual plant system can give students a vivid experience in this course. The virtual plant system has been proposed to reduce cost and simplify maintenance of lab facilities. As we do both, the development and employment of virtual plants, the paper includes approach to virtual plants development, description of some of them as well as our experience of their usage. The virtual plant system improves previous educational experiences in the course of Control System and Automation
Particle Filtering for Blind Equalization with Unknown Noise Variance
Authors: Chen Yuan , Dai Song Yin , Wang Yuan Qin
Published: February 2012

A particle filtering equalization algorithm with unknown noise variance is presented based on the optical particle sampling using the optical importance function. The optical importance function with unknown noise variance is deduced by analytically integrating out the noise variance as a nuisance parameter. And the posterior distribution of noise variance is derived recursively based on its prior distribution. Moreover, the optical particle sampling using the optical importance function is introduced to alleviate the degeneracy phenomenon so that a re-sampling step is avoided in the method. Numerical simulations show that the degeneracy problem of the proposed algorithm is alleviated greatly, and the proposed algorithm attains an approximate performance to the one with known noise variance.
Development for Stainless Steel Exhaust Manifold and CAE Analysis
Authors: Zhu Mao Qian , Lv Jun Cheng , Zhong Xiang Bo
Published: February 2012

The characteristics of stainless steel are discussed and the requirement on material for exhaust manifold is illustrated. Calculation on the exhaust manifold is carried out based on coupling of CFD and FEA software the distribution of temperature and thermal stress of exhaust manifold is demonstrated. The strength and safety factor of the exhaust manifold are evaluated, based on which the reliability of the design is confirmed
Faulty Scarfing Slab Detection Using Machine Vision
Authors: Choi Doo Chul , Jeon Yong Ju , Kim Sang Woo
Published: February 2012

In this study, we developed a detection algorithm using machine vision for faulty scarfing on slabs. Scarfing is a process for burning out defective areas on the surface of semi-finished steel products so that the product is suitable for subsequent rolling or forging. In the case of rolling, a poorly scarfed slab can cause serious defects. Therefore, an automatic inspection system for scarfed slabs should be developed. In the image of faultily scarfed slab, discontinuous bright bands and borderlines are observed. To detect the bright bands, we examined the real part of a Gabor filter. However, because the size of the bright bands is not fixed, the parameters of the real part of the Gabor filter were determined adaptively using the imaginary part of the Gabor filter. The performance of the proposed algorithm was tested with 2292 images of scarfed slabs of which 49 of the images were of faulty scarfed slabs. The proposed algorithm was able to detect defects with 95.9% accurate and the false alarm was 1.6%.