bluuebunny/crossref_metadata_2025 huggingface dataset:
Enhance the Process of Sedimentation for Copper Concentrate Pulp Using Combined Reagent
Authors: Mi Li Ping , Sun Chun Bao , Xu Tao , Liu Hong Jun
Published: December 2011

Due to the existing fine copper concentrate particles in the thickener overflow which can’t be reused, the water and copper resources have been wasted for a long time. In this study, the combination of coagulant (PAC and PAFC) with flocculant (N83376) were used to enhance the process of sedimentation of copper concentrate pulp, and the results of the above were compared with those when coagulant and flocculant was used alone. It is suggested that PAC and PAFC were both effective with the combination of N83376, however, excess of PAFC resulted in dispersion of particles. Therefore it was feasible to select PAC and N83376 as final combined reagent. The effectiveness of the coagulant and flocculant were evaluated based on the turbidity and the removal rate of suspended solids (SS) of the supernatant. It can achieve 17.03NTU of turbidity and 94.82% of SS removal rate with 750g/t PAC and 1.25g/t N83376, at pH 9~11. The results of filtration test indicate that the performance of copper concentrate pulp after coagulation-flocculation was improved. The filter rate was 0.45 ml/s faster than without reagent, and the water content of filter cake also decreased 1.84%.
Mechanical-Thermal-Chemical Coupled Research of Wellbore Stability in Jabung Oil Field, Indonesia
Authors: Yang Pei , Chen Mian , Jin Yan , Hou Bing , Qiu Kang , Liang Chuan , Zhang Wei
Published: December 2011

The Jabung oilfield in Indonesia is characterized by complex geological structural movement, large tectonic stress and high temperature gradient. Accidents such as borehole collapse and sticking were frequently encountered when drilling shale formations, which often result in serious damage. In this paper, a series of experiments were conducted to evaluate the performance of shale in drilling fluid, including linear expansion rate evaluation tests and rolling recovery evaluation tests. Also X-ray diffraction was used to analyze the mineral composition of shale. The mechanical parameters of shale were obtained through statistical analysis. By using ABAQUS software, the temperature difference induced by thermal stress distribution was analyzed. After that, the borehole stress distribution was determined by coupling the additional stress with in-situ stress. Finally, based on borehole stability mechanical models, the effects of well trajectory on borehole stability were analyzed. We found that the chemical properties of drilling fluid, wellbore trajectory and temperature has a great influence on wellbore stability, and the impact of temperature changes and of well trajectory are the largest factor.
Finite Element Simulation of Deformation Process of 316L Expandable Slotted Base Pipe at Room Temperature
Authors: Shen Wen Zhu , Li Chun Fu , Song Kai Hong , Wang Yan Qun , Zhu Hai Bo , Wang Shao Xian
Published: December 2011

Expandable screen called slotted base pipe functions as skeleton structure in expandable screen. The expansion process is very complicated due to the existence of slots on slotted base pipe and contact friction between expansion tools and tubular. In this work, based on elastic-plastic mechanical analysis of the expandable slotted tube in expansion process, the 3D nonlinear finite element analysis model of contact process was built. Aiming at two specifications of 4-1/2 and 6-5/8 inches 316L stainless steel slotted tubular, expansion deformation process at room temperature with expansion ratios of 25-35% range was simulated. With those works, it hopes to provide a useful foundation for the formulation of expansion technology of expandable screen.
Study on the Visual Prediction and Analysis Method of Mining Subsidence
Authors: Wang Jing Wei , Ma Dong Ling , Zhou Ya Fei
Published: December 2011

In view of actual conditions that AutoCAD is widely used in coal mines in China, the concrete method based on CASS software is intruduced, which can realize the visual prediction and analysis of mining subsidence. Because CASS software has been developed based on AutoCAD, when the digital mining map of CAD format is used, the switchover of data format is not required, and the input, output and edit of the digital mining map is very convenient. The displacement and distortion information of mining subsidence forecast can be represented in the digital mining map by means of the visual graph, which can easily analyze and evaluate mining subsidence. Using the visual method, the efficiency and accuracy of technical decision can be enhanced, and it has practical significance for the mine planning and design and the prevention and control of mining subsidence.
Production Simulate Analysis of Multiple-Fractured Horizontal Gas Wells
Authors: Yan Xiang Yang , Hu Yong Quan , Zhao Jin Zhou , Shen Bei Bei
Published: December 2011

Productivity simulation of multiple-fractured horizontal wells is the core technique during optimizing fracture’s amount and parameters. According to the dissymmetric double wings of multiple fractured high productivity horizontal gas well which is equality discreted, applying the theory of point source, the formula of unsteady seepage of gas and the principle of superposition, this paper deduce the model of overall pressure drop in formation considering the mutual interference of multi fracture. Besides, considering the high velocity non-Darcy’s flow’s effect to the fracture productivity in high horizontal gas well, establishing a more sophisticated new model to stimulate the fracture productivity in horizontal gas well. Via stimulation calculating and comparative analysing the high velocity non-Darcy’s flow, the dissymmetry of the double wings fracture, the length of fracture and the conductivity’s effect on the multiple fracture gas well’s productivity. This offers a more accurate method to optimizing the fracture’s amount in landscape and the parameters of fracture in high productivity gas well and making sure the proper production’s differential pressure.
Improved Genetic Algorithm for Optimization of Multi-Source Pumping Tree-Type Pipe Network
Authors: Zhan Hong , Yang Jian Jun , Ding Yu Cheng
Published: December 2011

An optimization model for multi-source pumping tree-type pipe network is established, in which the investment and operating cost are considered simultaneously. Useing graph theory knowledge, the essence of pipe layout optimization for multi-sources tree-type pipe network is searching for a group of optimal subtrees. In the complete optimization of pipe network, the pipe layout mode and pipe diameter are needed to optimize simultaneously, so the dual coding genetic algorithm combining binary coding with integer coding is adopted, and the pipe diameter restriction is satisfied automatically. According to the tree character, method based on cycle is adopted in the operational process of binary coding, the partheno-genetic operation is designed to produce new individual, the infeasible solutions are avoided. Example shows the efficiency of the algorithm.
Experimental Study of Organic Pollutants in Waste Water from the Coking Plant Adsorbed by Organobentonite
Authors: Liu Da Meng , Jiang Bai Kun
Published: December 2011

The adsorption of organic pollutants from the waste water in the Beijing Shougang Coking Plant has been studied using bentonite modified by cetyl trimethyl ammonium bromide (CTMAB) in this experiment. The factors that affected the adsorbing capacity are amount of modifier, amount of sorbent, reaction time and grain size of organobentonite through a series of dynamic experiments. The experimental results show that under the conditions: the grain size of organobentonite 150µm, amount of organobentonite 10g•L-1, modifier 5g and the adsorption time 60min, the removal efficiency of group components and polycyclic aromatic hydrocarbons (PAHs) from the waste water can reach 90% above.
Electromagnetic Methods for Shale Gas Exploration in Southern China
Authors: Tang Xin Gong , Su Zhu Liu , Hu Wen Bao , Yan Liang Jun
Published: December 2011

The shale gas is becoming a new strategic energy source in the world. To improving the efficiency of exploration and production of such a non-conventional resource has been a global choice of oil and gas powers. Many previous researches have revealed that China has equivalent amount of shale gas reserves as USA. China-based research has shown that the southern China is one of the most potential areas for shale gas exploration. However, the complex topography with carbonate covers and sophisticated geological structures in southern China is a main difficulty for seismic exploration to get reliable and high-resolution data. This paper alternatively present electromagnetic exploration methods that are applicable to shale gas exploration in such rugged area.
Detection of Carbon in Ferroalloy Using Internal Standard Method Based on LIBS
Authors: Zhang De Jiang , Wang Yu Hang , Lin Xiao Mei
Published: December 2011

Using LIBS (laser-induced-breakdown-spectroscopy)technology, element percent in ferroalloy can be measured. High energy laser beam focus on high temperature plasma of ferroalloy surface, using fiber spectrometer detected plasma emission spectral lines in the cooling process to determine the type and content in the ferroalloy elements. In the application of quantitative analysis internal standard method in ferroalloy C content, according to the measuring principle built experimental platform, according to Fe for internal standard elements, setting up the calibration curve of C content, and using the curves to ferroalloy samples in a quantitative analysis on the C element. The results show, LIBS internal standard method to determine the relative error of the ferroalloy C content for no more than 10%, verifying the internal standard method used in the determination of the elements in ferroalloy feasibility.
Feafure Research of Movement and Deformation to Surface of Earth due to Repeadly Mining
Authors: Hu Hai Feng , Li Min , Wang Guan Ru
Published: December 2011

Based on the datum of factual measuring to surface observation station in LUJIA mining area, This paper completely analyzes movement and deformation to surface of earth due to repeat extracting in mining, ascertains parameter of movement and deformation to surface of earth in this mining, obtains change tendency of basic parameter to surface of earth in this geological mining condition and basic feature of movement and deformation to surface of earth in repeat mining.
Characteristics of the Interfacial Wave Velocity on the Liquid Film of Annular Flow for Gas-Oil-Water Three-Phase Flow in a Horizontal Pipe
Authors: Wang Hai Qin , Wang Yong , Zhang Lei , Gong Jin Hai , Wang Zhen Yu
Published: December 2011

The experiments were conducted in a horizontal multiphase flow test loop (50mm inner diameter, 40m long) and the cross-correlation technology was used for the study of the characteristics of the interfacial wave velocity about two types of annular flow regimes (AN║DO/W and AN║DW/O) for gas-oil-water three-phase flow. The results show that the interfacial wave velocity on the liquid film of AN║DO/W flow pattern and AN║DW/O flow pattern all increases with the increase of gas superficial velocity and liquid superficial velocity on the condition of fixed ratio of oil and water flow rates, but the difference is that the increase is a linear monotonic increase for AN║DO/W flow pattern and a non-linear increase for AN║DW/O flow pattern, and the liquid superficial velocity makes a larger contribution than the gas superficial velocity. The interfacial wave velocity also increases with the increase of input water cut in liquid at different gas superficial velocities under the conditions of liquid superficial velocity fixed.
The Re-Design of Centrifugal Classifier
Authors: Li Kun Shan
Published: December 2011

The article analyses the problem in the use of φ4m centrifugal classifier from technology、design、manufacture、repair in detail,etc. It gives the solution from technology and machinery design.
Numerical Simulation of Liquid-Solid Two-Phase Flow Reflux in Particle Impact Drilling System
Authors: Sun Hao Yu , Zhang Yang , Wang Bin Bin
Published: December 2011

In particle impact drilling system, the steel particles would be recycled for economic reason. Thus, whether particles can return to the ground under certain conditions is an important problem. In this paper, the relationship between critical flow rate and annular gap is numerically studied using the Eulerian multiphase model in FLUENT software. Both the numerical and the experiment results show that the critical flow rate decreases with the increasing annular gap, and the simulation results correspond well with experimental results.
Back Analysis of Rockfall Trajectory and its Parameters
Authors: Wei Zuo An , Shen Lou Yan , Chen Yu Long , Zhu Bin
Published: December 2011

Every year, China suffers greatly from economic losses caused by rockfall hazards. The key to effectively control rockfall hazards is to obtain an accurate rockfall trajectory. However, not only is rockfall trajectory complex and unable to be described accurately in mathematical formula, but basic parameters influencing its movement are also unable to be measured directly. Therefore, the back analysis method combining laboratory rockfall simulation test with computer numerical simulation is adopted to study rockfall trajectory and its basic parameters. The results show that the method can not only get basic parameters of rockfall trajectory such as coefficient of restitution and angle of frication, but also precisely deduce true rockfall trajectory, which can provide help in effectively controlling rockfall hazards.
Influence of Ultrasonic Wave, Argon Blowing and its Coordinated Treatment on the Nitrogen Content in Low Carbon Steel
Authors: Li Jie , Li Ling , Rui Qi Xuan , Wang Jian Jun , Wang Hai Chuan
Published: December 2011

Influence of ultrasonic wave, argon blowing agitating and their coordinated treatment on nitrogen content in low carbon steel was mainly studied. Results showed that ultrasonic wave, argon blowing or their coordinated treatment can all reduce the nitrogen content in low carbon molten steel. While treated with ultrasonic wave separately, removal rate of the nitrogen in molten steel is relatively low with 3.13%~9.04%. Using the argon blowing agitating separately, removal rate of the nitrogen in molten steel is relatively high with 6.89%~32.68%, when the argon blowing flow is 0.5 l/min, removal rate of nitrogen is 32.68%. The nitrogen removal effect of the ultrasonic wave-argon blowing agitating coordinated treatment is considerably improved than that of separately ultrasonic treatment. While 300 W ultrasonic wave and 0.5l/min argon blowing agitating cooperatively treatment on the low carbon molten steel, the removal rate of nitrogen is 26.95%.
A Study on Tunnel Smoke Control Strategies by Experiment and Numerical Simulation
Authors: Liu Xiao Yang , Zhang Jing Yan , Li Yan Feng , Zhang Li Li , Yuan Jin Feng
Published: December 2011

In order to meet the need of the study on the tunnel fire safety system, taking the tunnel laboratory bench in the key laboratory of the university of science and technology of China as the object, this paper does a scale model experiment on the tunnel fire, and uses the Fire Dynamics Simulator（FDS）software to simulate fire smoke layer velocity under different longitudinal ventilation control, by comparing the experimental and simulation results, this paper not only gives the variation law of the tunnel fire smoke layer velocity under different longitudinal ventilation speed, but also proposes the concept of the smoke stratification critical wind speed , which will provide some references for the road tunnel fire control, rescue and evacuation.
Experimental Investigation of the Viscosities of High Titanium Containing Slags with Low Mass Ratio of CaO to SiO2
Authors: Sun Hao Yan , Wang Jing Song , Dong Xiang Juan , Xue Qing Guo
Published: December 2011

This present paper focuses on the viscosities of high titanium containing slags in the process of titanomagnetite smelting by taking the TiO2-Al2O3-CaO-SiO2 quaternary system as the object. Experimental determinations of the viscosities were carried out in the temperature range from 1573 to 1773K using the rotation cylinder method. The measurements were conducted in the composition range from 23 to 33 mass pct TiO2, 3 to 9 mass pct Al2O3, and 0.3 to 0.7 basicity (mass ratio of CaO to SiO2). The effects of TiO2, Al2O3, basicity, and temperature on viscosity were studied. The experimental results indicated that the viscosities decreased with increasing TiO2 content and basicity, and increased with increasing Al2O3 content, above the liquidus temperature. Based on the experimental data, the liquidus temperatures of the slags were evaluated using the second derivatives of the activation energies for viscous flow with respect to temperature.
Application of Data Mining in BOF Steelmaking Endpoint Control
Authors: Hu Yan , Zheng Zhong , Yang Jian
Published: December 2011

In this work, data mining was applied into in BOF steelmaking endpoint control. Through the characteristic analysis of key factors, the data sheet to control end point was formed. Potential knowledge was explored from the data sheet using association rule mining algorithm, then expert rule are achieved automatically. The results show that through the combination of the effective expert rules and traditional BOF endpoint model, carbon content and temperature were predicted with high accuracy. Therefore it can be a new research method to improve BOF automation.
Comparative Study of Frequent Pattern Mining Techniques
Authors: Singh Gauravjeet , Bal Sandeep , Kaur Poonamjeet , Kaur Kanwaljit
Published: December 2011

Frequent pattern mining has been a focused theme in data mining research. Lots of techniques have been proposed to improve the performance of frequent pattern mining algorithms. This paper presents review of different frequent mining techniques. With each technique, we have provided brief description of the technique. At the end, we compared different frequent pattern mining techniques.
Crystal Based Image Recognition Technique Enabling in a Life Saving Mission
Authors: Kumar V. Ashok , Krishnan S.Mohana , Balakumar S. , Kumar M.Santhosh
Published: December 2011

The “unprecedented growth” in the field of technology has gone past leaps and bounds to such an extent that it has given birth to a “life saving technique” to reveal the images of hidden objects that might prove to be an ecstatic news for the pilots to prevent flight crashes due to blurred weather and enabling the surgeons to perform a bloodless surgery. An effective way to accomplish this is to recover the image behind the obstacle by varying the electrical voltage across a crystal of Non-Linear material such as BBO, LBO. The image absorbs the energy from noise and showcases its structure to the observers as voltage is optimally varied. For weak signals, such as distant or dark images, incorporating noise into them can enhance their quality. It’s high time that we look into this technique in a futuristic perspective and implement it in a rampant manner to “prevent the exorbitant death toll and thereby save the invaluable lives of human beings existing in the universe.”
Text Extraction from Videos Using the Combination of Edge-Based and Stroke Filter Techniques
Authors: Choudhary Waffa
Published: December 2011

A novel method by combining the edge-based and stroke filter based text extraction in the videos is presented. Several researchers have used edge-based and filter based text extraction in the video frames. However, these individual techniques are having their own advantages and disadvantages to extract text in the video frames. Combination of these two techniques fetches good result as compared to individual techniques. In this paper, the canny edge-based and stroke filter for text extraction in the video frames are amalgamated. The effectiveness of the proposed method is evaluated over the individual edge-based and stroke filter based techniques and found that the proposed method significantly improves the text extraction rate in the videos in terms of precision (91.99%) and recall (87.18%) respectively
Analysis of Measuring Time for Au Nanoparticle Size Measurement by Photon Cross Correlation Spectroscopy
Authors: Li Chun Yan , Kong Ming , Zhao Jun
Published: December 2011

It introduced the basic principle of measuring the size of nanoparticles by the method of Photon Cross-Correlation spectroscopy (PCCS). The measuring time for Au particle size measurement at different concentration using PCCS was studied. We measured gold particles with an average diameter of 24.5 nm at different concentration and different measuring times by PCCS. The measuring results demonstrate that for the same measuring time, the higher the concentration is, the smaller the standard deviation of repeated measurements is; for suspension of the same concentration, the longer the measuring time is, the smaller the standard deviation of repeated measurements is. It fitted the relationship between the standard deviation of measuring results and the measuring time at difference concentration. For the needed measuring accuracy, we can get the measuring time for some concentration according to the curve fitting.
Optical Properties of CulnSi Nanocomposite Thin Film Deposited by Magnetron Co-Sputtering
Authors: Xie Jian Sheng , Li Jin Hua , Ping Luan
Published: December 2011

Thin CuInSi nanocomposite films were prepared by magnetron co-sputtering. The structures of CuInSi nanocomposite films were detected by X-ray diffraction(XRD); XRD studies of the annealed films indicate the presence of CuInSi, the main crystal phase peak is at 2θ=42.400°. The transmittance (T) spectra of the films were measured by Shimadzu UV-2450 double beam spectrophotometer. The band gap has been estimated from the optical absorption studies and found to be about 1.40 eV, but changes with purity of CuInSi.
Optical Properties of Nano-CuInSi Thin Films Prepared by Multilayer Synthesized Method
Authors: Xie Jian Sheng , Luan Ping , Li Jin Hua
Published: December 2011

Thin Nano-CuInSi films have been prepared by multilayer synthesized method using magnetron sputtering technology, and followed by annealing in N2 atmosphere at different temperatures. The structures of CuInSi films were detected by X-ray diffraction(XRD); X-ray diffraction studies of the annealed films indicate the presence of CuInSi, the peak of main crystal phase is at 2θ=42.450°; the morphology of the film surface was studied by SEM. The SEM images show that the crystalline of the film prepared by multilayer synthesized method was granulated. The transmittance (T) spectra of the films were measured by Shimadzu UV-2450 double beam spectrophotometer. The calculated absorption coefficient is larger than 105 cm−1 when the wavelength is shorter than 750 nm. The band gap has been estimated from the optical absorption studies and found to be about 1.47 eV, but changes with purity of CuInSi. CuInSi thin film is a potential absorber layer material applied in solar cells and photoelectric automatic control.
An Effective Method for Bonding Carbon Nanotubes onto Metal Electrodes
Authors: Lv Qiang , Chen Ming Xiang , Cao Hui , Gan Zhi Yin
Published: December 2011

An effective method was used to bond carbon nanotubes onto metal electrodes by induction heating process. A good contact between carbon nanotubes and metal electrodes was formed. The contact resistance can be reduced to approximate 95% after induction heating process. Because the induction heating process will selective occur on the structures with high relative permeability and low electrical resistivity, this method could be utilized to realize large scale localized bonding.
Size Effect Analysis of Thermal Conductivity in Lithium Nanometer Film
Authors: Wang Z. H. , Ni M. J.
Published: December 2011

Lithium is widely used in the pharmaceutical industry, fuel cell, ceramic industry, glass, lubricants, aluminum industry, refrigerant, nuclear industry and photovoltaic industry. The thermal properties of lithium are very important for the design and safe operation. The MEAM potential was applied to calculate thermal conductivity of lithium with emphasis on size effect analysis in the lithium nanometer film using non-equilibrium molecular dynamics simulation method. The results show that the lithium thermal conductivity increases with increasing film thickness. The obvious size effect and anisotropy of thermal conductivity are found in the lithium nanometer film. From the simulation results, the difference of normal and tangential thermal conductivity has been analyzed quantitatively.
Multifunctional Nanotubes
Authors: Sona R , Bagmar Priyanka
Published: December 2011

The objective is to demonstrate that physical properties of multifunctional material systems can be tailored for specific applications by controlling different types of nanotubes, their concentration and degree of alignment. The properties of structured polymers can be enhanced by combining nano tubes with desired properties to form a nano polymer. These may have the potential to provide structural integrity as well as sensing and/or actuation capabilities. By proper selection of the polymer matrix to promote donor acception and/or dispersion interactions can improve adhesion at the interface between the nano- tubes and hence also the polymer matrix significantly. An effective sensor material that responds to strain, stress, pressure, and temperature can be yielded by using very small loadings of single wall nanotubes in a polyimide matrix. These materials also exhibit significant actuation in response to applied electric fields. Alternative thermodynamic routes involve enhancing polymer/SWCNT interactions via amphiphilic surfactants, hydrophobic interaction with nanotubes, physical wrapping with conjugated polymers which exhibit enhanced dispersion interactions by adopting a π-stacked geometry , donor-acceptor interactions via charge transfer , Zwitterion complex formation , and non-specific interactions using DNA or peptide sequence.
Modelling of Adhesive Forces in Nanotweezer
Authors: Nezhad Amir Sanati , Stiharu Ion , Packiricamy Muthu , Bhat Mechanical Rama B.
Published: December 2011

In nano manipulation, carbon nanotubes (CNT) mounted on the AFM tip was used for pick and place of the nano size objects. In releasing step, the van der Waals adhesive force among the object and the contact surfaces of the gripper is not still well understood. In this paper, the adhesive electrostatic force, van der Waals (VDW) force between two cantilever tips and VDW force among cantilevers and the object are considered as dominant forces to pick and place the nano object. The equations governed on nanotweezer are solved using FEM code. The effect of object size, gap size and tips length on pull-in voltage are evaluated. The presented model could be used to design the tweezers for pick and place of size-defined nano object mounted on microgripper.
Carbon Nanotubes Reaction Fields for Open Well Biochemical Analysis System
Authors: Ikushima Takashi , Yang Ming
Published: December 2011

We made the open well biochemical analysis system using piled up CNTs as the reaction fields on a porous glass substrate. The effects of the structures of CNTs and the surface activation using O2 plasma to the sensitivity are evaluated. Reaction fields of CNTs layer of 0.2 [mg] showed twice higher sensitivity than that of 0.1 [mg], and three times higher sensitivity than Si wafer. O2 plasma irradiation also increased the sensitivity of this open well system of biochemical analysis.These increases can be described as the results of the larger sorbable surface area of the reaction fields.
Multiwalled Carbon Nanotube Growth Mechanism on Conductive and Non-Conductive Barriers
Authors: Teh Aun Shih , Bien Daniel C.S. , Saman Rahimah Mohd , Chen Soo Kien , Tan Kai Sin , Lee Hing Wah
Published: December 2011

We report on the catalytic growth of multiwalled carbon nanotubes by plasma enhanced chemical vapor deposition using Ni and Co catalyst deposited on SiO2, Si3N 4,ITO and TiN Xbarrier layers; layers which are typically used as diffusive barriers of the catalyst material. Results revealed higher growth rates on conductive ITO and TiN Xas compared to non con-ductiveSiO2, and Si3N 4,barriers. Micrograph images reveal the growth mechanism for nanotubes grown on SiO2, Si3N 4 and ITO to be tip growth while base growth was observed for the TiN X barrier layer. Initial conclusion suggests that conductive diffusion barrier surfaces promotes growth rates however it is possible that multiwalled carbon nanotubes grown onSiO2, and Si3N 4,were encumbered as a result of the formation of silicide as shown in the results here.
Study of Heating Effect on Specific Surface Area, and Changing Optical Properties of ZnO Nanocrystals
Authors: Babak Jaleh , Ghazaleh Ashrafi , Nasim Gholami , Saeid Azizian , Reza Golbedaghi , Safdar Habibi , Hosein Parsian
Published: December 2011

In this work ZnO nanocrystal powders have been synthesized by using Zinc acetate dehydrate as a precursor and sol-gel method. Then the products have been annealed at temperature of 200-1050°C, for 2 hours. The powders were characterized using X-ray diffraction (XRD), UV-vis absorption and photoluminescence (PL) spectroscopy. The morphology of refrence ZnO nanoparticles have been studied using Transmission Electron Microscope (TEM). During the annealing process, increase in nanocrystal size, defects and energy gap quantitative, and decrease in specific surface area have been observed.
A Beamformer Employing Pseudo-Interference Technique for Digital Communication Systems
Authors: Chu Yi , Horng Wei Yau
Published: December 2011

This paper presents a new receiver for antenna array to provide robustness against adaptive array imperfections. These imperfections include the array gain errors and the directional mismatch. The superior performance of the proposed receiver is primarily achieved by adding an injected pseudo-interference in the diagonally loaded Capon beamformer. Simulation results demonstrate that the proposed method has excellent performance for both binary phase shift keying (BPSK) and quadrature amplitude modulation (QAM) systems.
A New Switched-Capacitor Multiply-by-Two Amplifier with Reduced Mismatch Sensitivity
Authors: Lu Chi Chang
Published: December 2011

A new switched-capacitor multiply-by-two amplifier with an accurate gain of two is presented. The proposed architecture requires only one opamp in four phases to generate two effective outputs. It significantly suppresses the gain error due to capacitor-mismatch and also provides a better power efficiency. Monte-Carlo simulation results are presented to confirm the feasibility of this new technique, demonstrating its suitability for high-resolution pipelined A/D converter.
An Improved Multi-Classifier Road Detection Applied to Navigation of Automatic Land Vehicle through Remote Calling
Authors: Shen Szu Yu , Lo Rong Chin
Published: December 2011

This paper proposes a technique of calling ALV remotely. Firstly, sending the GPS information of the target to the ALV by wireless network, then path planning is completed by prepared map data. If the target is changing in navigation, a new path to the terminal point will be to re-plan. AdaBoost algorithm [1] is introduced for implementingroad detection; different types of classifiers are trained to detect different road surfaces. In conclusion, the ALV is able to determine driving directions on different road surfaces.
Web 2.0-Based E-Learning: A Probe into the Application of Online Social Networking in College Freshman English Curriculum
Authors: Chung Liang Yi
Published: December 2011

Interaction, sharing, and connection are at the heart of Web 2.0, giving rise to innovative online media usage and the concept social networking that have transformed not only the network behavior of the masses, but also the form of online learning. In college English learning courses, Web 2.0 provides real-time and easily-accessible online resources for students to search for the information they need, granting them more autonomy in the English learning process. Meanwhile, Web 2.0-based network tools and video-sharing platform, such as Wikipedia and podcasts, provide a user-oriented and user-centered mechanism that allows personal creation, cooperative creation, interactive social networking, and peer-to-peer mutual learning, as an extension to the scope of autonomous English learning. In addition, with the rising popularity of Web 2.0-inspired social networking sites like Facebook, Twitter and blogs, the concept of social networking should also be increasingly incorporated into language education, since it promotes online interactions among English learners, while facilitating the establishment of information sharing, data query, and learning partnership in the network learning community. Thus, this project exploits Web 2.0-based online learning as the framework to design freshman English materials fusing social learning elements, for the purpose of boosting students’ interests for enhanced learning effectiveness, expanding e-learning into s-learning.
A Novel AR-Based Interactive E-Learning Platform
Authors: Chang Rong Chi
Published: December 2011

This present study combines augmented reality and interactive multimedia for the construction of a learning system that offers educational knowledge on butterfly metamorphosis, as we call it ARButterfly. The main purpose of designing this learning platform is to apply AR technology to produce innovative interactive learning models that are both fun and educational, creating an enriched learning experience through multimedia. With this platform, learners control the AR markers and are presented with life-like 3D objects to learn about the life cycle of butterflies. In addition, learners are given the opportunity to further observe the ecological interactions between butterflies and flowers or plants in this virtual setting. Our findings show the platform is capable of boosting students’ learning interests and improving their learning effectiveness.
Research on the Management System and it’s Key Technology for Retail Industry Distribution Center
Authors: Cao Guang Ming
Published: December 2011

In this paper, the design scheme for the retail distribution center management system is proposed and analysis of the key technology is given. The systems involve procurement, inspection, storage, repacking, distribution, scheduling, return goods, and other functions. The key technologies for role access control, storage process and workflow are adopted, which ensure the goods supply of the retail enterprise shop, reduce the supply of goods transport costs, and improve the competitiveness of enterprises.
Research on Computer Control System of Automobile Safe Checking Process
Authors: Liu Jia Xin , Liu Shu Yu , Zhao Wei
Published: December 2011

According to the national standard GB7258-2004 “The Safety Technology Qualification of the Automobile Run”, the Computer control system of automobile safe checking process we designed can gathers the data of stage meter exactly. It can process and store the data by computer then display and print the result of the examination. This subject mainly emphasizes on the design of the system hardware, mainly include develop a set of stable and dependable analog signal processing circuit and simulation.
RLS Adaptive Noise Cancellation via QR Decomposition for Noisy ICA
Authors: Zhang Ming Liang , Wang Shu Zhao , Jia Xin Yan
Published: December 2011

This study addresses the independent component analysis (ICA) in the presence of additive noise via an approach of adaptive filtering. Recursive least squares (RLS) adaptive noise cancellation via QR decomposition (QRRLS) is introduced to reduce the bias in the mixing matrix caused by noise. To test performance of this approach, two kinds of experiments for speech signals are conducted by combining Fast-ICA algorithm with it, on the conditions of identical noise and correlational noises respectively. Moreover, in order to measure the performance availably, the least-squares method is adopted to calculate the signal to noise ratio (SNR) of recovery signals. By comparison, it shows that this approach outperforms the adaptive noise cancellation via least-mean-squares (LMS) algorithm.
“Network Hard Drive” Service System in Campus Network
Authors: Yu Zhang Hong , Jian Yu Qing
Published: December 2011

This study if from the Building of "network hard drive" service system of Hebei Normal University of Science and Technology. First of all, combined with the user's characteristics and application needs of college campus network, depth study is conducted on the campus network storage program, and designs a fully functional network hard drive system, and on this basis, Identifying the key factors of impacting performance through research and analysis to system, studeying the optimization strategies and methods to services; proposing the design program of performance optimization system through experimental and testing of all optimization strategies to system, and ultimately achieve.
The Land Suitability Evaluation of Cotton Based on GIS Technology
Authors: Lu Shuai , Ma Rong , Chen Wei
Published: December 2011

The land suitability supply the decision-making for the planning and design and rational distribution, and prevent the unreasonable use of land. In order to evaluate the land suitability of cotton, the research which makes use of ArcGIS establishes the common model including the partition of evaluation unit, the selection of evaluation factors, the determination of the weight, and form a fast, simple and practical evaluation process. The results illustrate that 61 percent of the study area are suitable for the cotton’s growth; the content of salt is the main limit factor of the cotton’s growth.
A Necessary Condition for Optimality in Multi Objective Programming under Inclusion Constraints
Authors: Shen Jin Xing
Published: December 2011

Optimality conditions for multi objective programming problems have been studied extensively in the literature. A necessary condition for Pareto optimality is derived by reducing the multi objective programming under inclusion constraints to systems of single objective problem and then using known results of them. The result is reasonable and efficient. Our aim in this paper is to get the optimality condition of problem (MOP) by a lemma which helps reducing multi objective optimality problem to systems of single objective ones.
Factors Leading to Financial Crisis of Business Model Innovation-Oriented Enterprises (BMIE)
Authors: Quan Si Yong , Zhao Hong Yan , Zhai Yu Ming
Published: December 2011

Through literature review and case study, identifies such factors leading to financial crisis of BMIE as external environment，risk awareness，strategic decision-making，business management，internal control system and corporate governance. It also builds a structural equation model on the base of the investigation data from 279 domestic enterprises. The study result shows that strategic decision-making，enterprise management, enterprise governance and internal control system cast great influence on financial crisis，while the external environment fails to pass the test of significance.
Effects of Linoleic Acid on Hepatopancreatic Cell Proliferation of Prawn, Penaeus vannamei
Authors: Wang Hong Wei , Cai Duan Bo , Li Kai Ming , Xu Hai Ming , Duan Ming
Published: December 2011

The effects of linoleic acid on hepatopancreatic cell culture of the kuruma prawn, Penaeus vannamei were conducted. The culture system consists of 199 media (M 199) supplemented with 0.060 mol/L NaCl, 1.011g/L glucose, 1000 UI/ml penicillin, 1000 μg/ml treptomycin, 20% heat inactivated fetal calf serum (FCS) for primary cells and 10 % for subculture cells. The content of phosphorus in cultured cells was measured. The results show that the growth condition of cultured hepatopancreas cells in P. vannamei was significantly improved by added 160 μmol/L linoleic acid.
Design of a Simple Self-Organizing and Multi-Hop Routing Algorithm Based on ZigBee Node
Authors: Wang Ping , Xu Shi Wu
Published: December 2011

This paper briefly described the basic sensor network node architecture, point introduces the hardware design of the ZigBee Sensor nodes based on ATmega128L and CC2420, Power consumption of design node is low, smaller, higher integration, open to independent wireless communication module, multilayer, reducing the interference. And based on this hardware platform, Designed a self-organization Routing Protocol .Through networking experiments, verify the feasibility of the protocol. The protocol is very suitable for small-scale wireless sensor networks.
Research on Time Synchronization Algorithm in Wireless Sensor Networks
Authors: Wang Ping , Xu Shi Wu
Published: December 2011

Time synchronization is important for many applications in Wireless Sensor Networks, how to improve synchronization precision and reduce energy consumption are the two important aspects in Wireless Sensor Networks. In this paper, first, we introduce the TPSN and DMTS algorithms, after analyzing the advantages and disadvantages of both. Make use of two algorithms have been integrated. We proposed a DMSN time synchronization algorithm. Experiments show that ,comparing with the TPSN algorithm, DMSN algorithm has lower complexity and energy consumption．It can be easily applied in Wireless Sensor Networks．
Multivariate ANOVA of College Students’ Mental Health
Authors: Jia Qing , Mu Ling Ling
Published: December 2011

This paper used multivariate analysis of variance (MANOVA) method to investigate whether changes in the independent variables such as gender, age, family location etc, have significant effects on the dependent variables. Date was collected from students in Hebei University of Technology, by using Chinese College Student Mental Health Scale (CCSMHS). Result shows that interaction from four factors such as interactions among gender, only-child, major and family location have significant influence on anxiety. Different family locations also affect some dimensions. Mental health of students grow in large cities is significantly better than those from small and medium-sized cities, small towns and rural.
Real-Time Object Tracking Based on Android Platform
Authors: Chu Jing Hui , Zhai Xing Pei , Su Guan Nan , Chen Cai Lian
Published: December 2011

A real-time application is proposed for Android smart phone. To achieve the best tradeoff between the complexity and the processing efficiency, Java Native Interface (JNI) is used rather than pure Java. The performance of the application is tested on an Android smart phone by dealing with various pedestrian videos. And the experimental results show that the application successfully detects and tracks certain moving object.
Fast Re-Association Scheme in Beacon-Enabled Wireless Sensor Networks
Authors: Xie Sheng Dong , Cheng Huan
Published: December 2011

Zigbee has been considered as a promising standard for wireless sensor networks. There are two recovery mechanisms when node is orphaned. Although an orphan realignment mechanism is provided in Zigbee, it is only suitable for orphaned node associating with the coordinator which has 64-bit physical address of the orphaned node, and not suitable for beacon enabled network. And the re-association mechanism is time consuming because there is a long delay for channel scan before association. In this paper, we propose a fast re-association scheme for beacon enabled network based on Zigbee, in which the passive channel scan is not needed before association. Orphaned node selects the coordinator which has the highest estimation value. Because the channel scan is not needed, the re-association delay could be reduced greatly.
The Method of Real-Time Distance Measurement Based on Monocular Vision
Authors: Lu Wei , Wang Ting Ting , Chu Jing Hui
Published: December 2011

The paper proposes a real-time monocular vision-based algorithm that can be applied to robot tracking. Unlike the models used in other papers, the model used in this paper is suitable for the condition that the camera is looking up. There is a common deficiency existing in previous models that the target point is constrained to some areas of the camera field. To overcome the shortcomings, the camera field of view is divided into three regions which also reduces the computational complexity. The intrinsic parameters of camera can be obtained by calibration. Pitch angle rectification, together with camera calibration, improves the ranging accuracy.
An Algorithm of Incremental Bayesian Classifier Based on K-Nearest Neighbor
Authors: Wang Dong , Xiong Shi Huan
Published: December 2011

The learning sequence is an important factor of affecting the study effect about incremental Bayesian classifier. Reasonable learning sequence helps to strengthen the knowledge reserve of the classifier. This article proposes an incremental learning algorithm based on the K-Nearest Neighbor. Through calculating k maximum similar distance between test set and training set ,dividing and structuring the sequence of class number and the sequence of sum of class weight. According to the undulation degree of sequence, the instance including stronger class information is chosen to enter the learning process firstly. The experimental result indicates that the algorithm is effective and feasible.
Research on Intrusion Detection Method Based on Neural Network
Authors: Xu Chi , Zhang Wen Fang
Published: December 2011

The research of this dissertation focuses on the quantitative methodologies of the network security assessment. So the dissertation gives the term “Model-based network security risk assessment” a more meaningful definition. The methodology called a model-based will use one network security analysis model to design the scenarios of threatens according to the Patterns behaviors of vulnerabilities and threatens in the network. And then the risk assessment will be done under those scenarios. Following this new definition. The dissertation Proposes a Component-centric Access Graph Based Network Security Risk Assessment Model (Oc-AGNSRAM).
Extended Finite Time Inverse Optimal Control of Nonlinear Systems
Authors: Ren Xin Jun , Shen Yan Jun
Published: December 2011

In this paper, we use the definition of control Lyapunov functions to study finite time inverse optimal control for affine nonlinear systems. Based on control Lyapunov functions, a finite time universal control formula is presented, which can ensure the closed-loop system is finite time stable. From this, less conservative conditions for the finite time inverse optimal control are derived. We design a finite time inverse optimal control law, which minimizes the cost functional. A numerical example verifies the validity of the proposed method.
Research on Pretreatment of the Tire Mark Image
Authors: Yu Xia , Fu Yi Bo
Published: December 2011

utomobile tire is an important component of the vehicle. Its quality is directly related to the operation of vehicle performance and safety performance. Tire marks printed correctly can ensure the tire used properly. Compared with current recognized by artificial, Recognized automatically by computer can significantly improve the detection efficiency of tire mark. This paper discussed the research on pretreatment of the tire mark image. The direction of the scan of the text area is along the radius of the circle and circumference of tire. This method also conducted gamma correction, histogram equalization, binary and other pretreatments about the collected tire images. It can effectively remove the ground noise, optimize the text area, and lay a solid foundation for further recognition processing.