bluuebunny/crossref_metadata_2025 huggingface dataset:
Multifunction Evaluation System for Coal-Bed Gas Adsorption Isothermal and Pollution of Drilling Fluids
Authors: Yu Wei Chu , Hu Qiong , Lai Xiao Qing , Xiao Xiang Song , Liu Wan Qin
Published: February 2011

The multifunction evaluation system for coal-bed gas adsorption isothermal and pollution of drilling fluids is used for detecting the isothermal curves of adsorption and desorption needed in coal-bed gas exploration and development, at the same time, the system is used for studying the influences of external conditions applied on the coal bed such as reservoir temperature, moisture in the coal, the component of adsorbed gas, the drilling fluids and fracturing fluids on the coal beds, and pertaining to the technical area of the test instruments of coal-bed gas for drilling, exploration and development. Structure of the system is rational with advanced performance and high automation, its pressure and temperature are controlled by high precision sensors, and the microcomputer matched with the instrument has functions of rapid data acquisition, data process and chart plotting. This evaluation system can not only be used for detecting the isothermal curves of adsorption and desorption of single component gases, also can be used for detecting the isothermal curves of multi-component gases and deriving the diffusion coefficient of gas in the coal beds. Also the system can be used for evaluating the restoration value of the coal-bed desorption ability both before and after being polluted by drilling fluids and estimating the influence of drilling fluid and fracturing fluid, by which the shortcomings of unicity of adsorption and desorption test of coal bed gas, low automation level and low accuracy at present are eliminated, and it has the characteristics of clear flow-sheet, easy operation, modules of experiment software and standardization of experiment data.
Research of Two Stage Single Screw Expander Organic Rankine Cycle System Scheme Based on the Waste Heat Recovery of Diesel Engine’s Exhaust Gas
Authors: Zhang Hong Guang , Liang Hong , Liu Xing , Liu Bin , Chen Yan , Wu Yu Ting , Wang Wei , Yang Kai
Published: February 2011

According to the analysis of heat balance, about 1/3 of the fuel combustion heat is taken away into the ambience by exhaust gas of diesel engine. In this article, to improve the using level of the fuel’s combustion heat, a two stage single screw expander organic Rankine cycle (ORC) system has been used to recover the waste heat from exhaust gas of a certain turbine diesel engine. In this article, physical model of the recovery system was built at first, then the T-S curve was drawn, at last, REFPROP was used to calculate thermodynamics parameter in different state point of this system, and analyze the whole system’s thermodynamics character. By analyzing, the evaporation temperature of this system should be optimized to get the relatively evaporation press; by calculating, it could be seen that the middle heater in this system should be taken away to improve the economy of this scheme. This scheme should supply a direction for the exhaust heat recovery of diesel engine.
Study on Mixture Formation of Liquid LPG for a Center Injection DISI Engine
Authors: Xu Bo Yan , Sun De Zhi , Qi Yun Liang , Zheng Yong Wei , Tian Hai Ying , Cai Shao Li
Published: February 2011

Center injection in pentroof combustion chamber can reduce wall wetting and unburned hydrocarbon emission in wall guided combustion system, which is generally employed in DISI (Direct Injection Spark Ignition) engines. Once liquid phase LPG (Liquefied Petroleum Gas) is injected at a high pressure, flash boiling occurs severely, promotes mixing and reduces wall wetting in wall guided engine. Based on validating the feasibility of the models, this paper numerically simulates the mixing process of a center injection wall guided DISI engine in different conditions. The results show that a stratified charge can obtained at part load with late injection, whereas at high load the early injection can achieve a homogeneous mixture at the end of compression stroke.
Research on 3D Non-Destructive Measurement System Based on Homogeneous Entity
Authors: Gan Yong , Zhong Jing Ru , Gan Du Fen
Published: February 2011

A new non-destructive measurement system of the homogeneous entity profiles was designed; it included the digitized minute entity cells and the delaminated measuring method for product profiles based on liquid. It is based on Archimedes' principle and lever principle and gravity moment, used optic system to collect images and calculated the verge profiles, combined the equations of the gravity moment and the equations of the center of gravity to reckon the 3D coordinate values of every minute entity cell in different layers by computer. By inputting the 3D coordinate values of the product into the related CAD software system, the 3D model could be obtained. The principles, hardware and software of the system were introduced in details about the measurement system of the homogeneous entity profiles.
Fabrication of High Concentration Reflected Photovoltaic Module
Authors: Hsu Cheng Yi , Chiang Yu De , Lin Yu Li
Published: February 2011

The task of this study is to find the optimal condition of designed High Concentration Reflected Photovoltaic (HCRPV) module by simulation method whose concentration ratio is set to be 872. This simulated optimal condition was then utilized to fabricate HCRPV module. In simulation, the focal length of first and secondary mirror, the slope angle and the length of light guide tube were the main parameters to be optimized. From simulation, the light collective efficiency, the energy uniformity, the shape of light spot diagrams can be obtained. It was found that square based pyramid light guide tube can effectively improve the uniformity of light. When the slope angle of square based pyramid shape of light guide tube is set to be 3 degree, the focal length of the first mirror is 60mm and the secondary mirror vertex distance is designed to be 93.1mm, the HCRPV module have the best performance. It was also found that the light collective efficiency can be reached to about 97.7% with these conditions. The Aluminum HCRPV module was then fabricated according to the optimal simulated conditions. As the solar energy of illumination is 650 W/m2, the voltage on the multi-junction solar cell was measured to be 2.56V, the current was measured to be 0.68A. The corresponding power was about 1.74W. When the HCRPV module was coated with silver material, the voltage on the multi-junction solar cell was measured to be 2.7V, the current was measured to be 2.83A, as the solar energy of illumination is 800 W/m2. The corresponding power is about 7.64W.
Study on the SMT Chip Resistor Solder Joint Two-Dimensional Quality of Information Extraction Based on VC++
Authors: Sun Yu Feng , Zhou De Jian , Zhao Qiang , Zhu Shao Hua
Published: February 2011

This paper introduces the content included in two-dimensional quality information of the SMT solder joint and illustrates the basic principle of extracting two-dimensional information quality of SMT solder joint .By explaining the basic theory and principles and combining with example, the implemention of extracting methods and steps are discussed.The extraction algorithms carry out in VC + + programming, And this lay a good groundwork for follow-up intelligent analysis of solder joint.
Research on CFD of Fluidization of Biomass Waste Fast Pyrolysis Reactor
Authors: Li Rui , Jing Liang Jing , He Ming Ming
Published: February 2011

Biomass fast pyrolysis technology is one of most promising methods to utilize biomass resources, for its high production of pyrolysis liquid named bio-oil. And the fast pyrolysis fluidized reactor is widely used because of the advantages of simple structure, and easy to enlarge. The understanding of computational fluid dynamics (CFD) of its fluidized bed is necessary basis for particulate heat transfer and pyrolysis kinetics research. In this paper, modern hydrodynamic theory and calculation means is employed to simulate the cold state of fluid behavior in the pilot-scale fluidized pyrolysis reactor. The simulation results are in good agreement with the empirical equation and experimental data, with resultant error lower than 10%. Based on the cold state simulation, we modeled the fluid flow behavior in the fluidized reactor during fast pyrolysis under high temperature, and calculated the fluidization velocity and the distribution of solid phase fraction.
Decision Support Technology of Enterprise Production Management Based on Data Mart
Authors: Chang Jian Tao , Qiu Yuan Ying , Li Shen
Published: February 2011

With the rapid development of enterprise informationization, the application of decision support system has been the focus of interest of recent studies due to its high-efficiency. In order to realize the decision support of enterprise production management, we established integration model of production information based on heterogeneous databases, designed data mart of production management, in the design of data mart, we discussed the data model and the realization process of the data mart. We put forward the architecture of the system, studied the decision scheme, layered structure and decision rules, and then developed the enterprise production management decision support system. Enterprise production efficiency can be improved through the application of the system.
Research on Knowledge Navigation Supporting Rapid Design of Complex Product
Authors: Ji Yang Jian , Long Kan , Qi Guo Ning
Published: February 2011

In the multi-disciplinary design process of complex product, it is hard for designers to obtain designing knowledge timely and accurately which causes the low efficiency of product design. With consideration of the above problem, knowledge navigation method is proposed based on context navigation model (CNM) and knowledge model (KM). CNM describes the matching relationship between designing activity context (AC) and knowledge context (KC), and composes of AC, KC and knowledge context network (KCN). KM describes designing knowledge element (KE), and the matching relationship between KC and KE. Based on these models, procedure of multi-disciplinary knowledge navigation is introduced. Taking the design process of industrial steam turbine rotor flow division section as an instance, the result shows that this procedure, based on CNM and KM, is able to supply designers with proper product knowledge timely and promote the designing efficiency of complex product.
Research on Generating Interference-Free Tool Path Based on Triangular Bézier Surface
Authors: Kang Xin Cai , Sun Dian Zhu , Shi Yang , Sun Yong Wei
Published: February 2011

To improve efficiency of NC tool path generation for triangular Bézier surface and solve the interference issues of tool path, we proposed an algorithm of generating interference-free NC tool path based on triangular Bézier surface. The R*S tree is introduced into the algorithm and the dynamic spatial index structure of the triangular Bézier surface model is established by R*S tree; the intersection regions are acquired rapidly based on the R*S tree, so that the intersection triangular Bézier patches are located exactly; each intersection triangular Bézier patch is adaptively subdivided into many triangular planar patches in the scope of the tool path precision; the intersection curves are acquired through the intersection of triangular planar patches and cutting planes; the points on intersection curves are taken as the driving points, thus the interference-free cutter location points of triangular Bézier surface are obtained by the iterative calculation method, and then the interference-free cutter location points are connected rightly to generate NC tool path. It has been proved by examples that the algorithm of generating NC tool path based on triangular Bézier surface has strong adaptation to data type and that it can accurately and efficiently obtain the interference-free NC tool-path for the intricate triangular Bézier surface.
VD Vacuum Furnace Shell’s Buckling Numerical Analysis Based on Ansys
Authors: Gao Zhan , Liu Xiang Dong , Huang Qing Ming
Published: February 2011

Take VD furnace’s shell as research object, using ANSYS FEM study its stability character. The furnace body and cover’s 3D and FE model were established separately. Model’s eigenvalue buckling were analyzed at 20°C and 200°C , on the basis of this, considering structure’s initial disfigurement and material’s nonlinearity, furnace body and cover’s double non-Linear Buckling Load under external pressure were calculated. The result shows that furnace body’s double non-Linear Buckling Load are 1.44 MPa and 0.96 MPa at the normal temperature and 200°C separately, and its appeared 7 wave-number’s lateral instability; The furnace cover’s double Non-Linear Buckling Load are 2.07MPa and 1.23 MPa at the normal temperature and 200°C separately, maximum displacement on the roof and near vacuum duct position. The furnace body and cover’s stability under 20°C and 200°C satisfied design requirements. The calculate results provide the theory basis for VD vacuum furnace’s physical design.
Study on Crankshaft Design Based on CAD/CAE
Authors: Xia Chang Gao , Su Jian Kuan , Pan Mao Hui
Published: February 2011

This paper presents an integrated method, which is based on the CAD/CAE, for engine crankshaft design. A parametric modeling system of engine crankshaft is established with the CATIA secondary development tools. Taking advantage of the finite element analysis procedure of engine crankshaft strength which is programmed with ANSYS APDL programming language, the parametric loading, automatic solution and result analysis of the crankshaft strength can be realized. Integrating the parametric modeling system of engine crankshaft and the special finite element analysis procedure of the engine crankshaft strength, the three-dimensional digital model of the crankshaft can be generated rapidly. By changing the structure dimension, the crankshaft series design is achieved and the design and analysis can be improved. Therefore, it is helpful to improve the design quality and efficiency of crankshaft and shorten the design cycle.
Study on the Structured Process Operation Language Based-On Predicate Logic
Authors: Zeng Sheng Chuo , Wei Ren , Liao Xiao Ping , Zhou Fa Hua
Published: February 2011

This paper deeply studies the characteristics of process language and denotes the process operation language with predicate logic, in the purpose of simplified the generation of process operation language. Using data mining technology, we generalized and stratified the conception of the process operation language. Based on the binding mechanism, a high level model of process operation language was established. The paper has solved the problems in the universal structured generation of the process planning language, and achieved application success.
Domain-Based Trust Evaluation Strategy for Manufacturing Grid
Authors: Ge Zhi Hui , Li Tao Shen , Li Lin
Published: February 2011

In manufacturing grid, trust management is the core component, which is associated with resource sharing, role assignment etc. How to compute and evaluate the recommended trust is very important for cooperation among resource entities coming from different domains. In order to resolve the problem, a two-layer domain structure is constructed to organize the distributed cross-domain cooperation and the corresponding trust value evaluation algorithm is designed based on the structure. At last, an application prototype is developed to show the validity and the practicability of the proposed method.
Design and Implementation of Machine Vision Automatic Laser Scanning System
Authors: Yan Heng Feng , Shao Jun , Chen Ji Min
Published: February 2011

This paper introduces a solution for laser scanning system, which utilizes machine vision technology. It includes algorithm for positioning and matrix for scanning control. The system can be used to detect an object and laser mark on specific position. This work explains how to use one CCD to catch an object’s position variation relative to a reference point, and how to translate the different coordination systems for laser scanner etc.
The Application of Inertial Measurement Unit in Inertia Parameter Identification
Authors: Wang Bo , Hou Zhong Xi , Gao Xian Zhong , Shan Shang Qiu
Published: February 2011

This paper presents a simple but effective method for inertial parameter identification with symmetrical trifilar pendulum and inertial measurement unit (IMU). An improvement upon conventional pendulum method is described by introducing IMU to identify the orientation of specimen by self-alignment, and then complicated equipment and experimental manipulation are not needed any more. Based on the excellent capacity of motion tracking, the IMU is also used for recording the characteristic of periodic movement by collected the information about acceleration and angular velocity. The main sources of identification errors are discussed from a set of examples. Then an experiment is carried out, and Fourier analysis is used to gain the oscillation period, which made the measurement much more convenient and accurate. The identification results are also presented by comparing with reference values computed from geometrical considerations, which proves the effectiveness of such method.
Material Selection of Casing in Gas Well Containing CO2 and H2S
Authors: Yan Xiang Zhen , Shao Bing , Yang Xiu Juan , Wang Tong Tao
Published: February 2011

Based on analysis of different guidelines and standards for material selection of casing which belong to six companies in four countries, the main factors that influence the material selection of casing have been generalized. Through comparing the safety and corrosion resistance properties of materials recommended by different guidelines in specific conditions, a synthetic guideline has been developed, which can provide a more appropriate suggestion. The environmental conditions and materials adopted in East Sichuan region have been taken for example. By comparing the proposed results with adopted materials of field well completion, it demonstrates that the result provided by the synthetic guideline is accurate and reliable.
Research on Fault-Tolerant Relay Node Placement Based on Greedy Optimization Algorithm in Wireless Sensor Networks
Authors: Wang Zhu , Wang Qi , Wei De Bao
Published: February 2011

In this paper, relay node’s communication capacity was introduced into the existing model of relay node placement. And we presented a new evaluation standard based on the minimum distance factor of communication network. A new relay node placement algorithm was implemented in solutions, and the algorithm was based on greedy optimization algorithm. The simulation result demonstrates that the algorithm can limit the communication capacity of relay nodes conveniently. Compared with other placement algorithms, improvement of energy-efficiencies in this algorithm is obvious.
A Self-Construction Digital Resources Backup System Designing and Analysis
Authors: Shen Li Zhen
Published: February 2011

This paper introduced the definition of the self-construction digital resources and it needs long-term preservation. The author produced a suitable backup system of the self-construction digital resources according to its software and hardware features, and made a simple analysis.
A New Configuration Scheme for Multi-FPGA Systems Based on XCF32P
Authors: Yan Dan Gui , Zhang Cheng Chang , Tong Rui Jun
Published: February 2011

The paper gives a new configuration method for Multi-FPGA systems based on XCF32P. As an example, the method adopts slave SelectMAP model, uses a XCF32P and a CPLD XC9572 to configure four Virtex XCV200 FPGAs. The configuration hardware interface circuit and CPLD software control program are designed, due to adopt a single vendor solution program, the designs for software and hardware of systems are simplified, and it can receive a higher configuration rate.
“Target-Operation” Cost Management Model
Authors: Chen Jing Pu , Wang Wei Wei
Published: February 2011

Objective cost management and Activity-Based cost management are both more advanced cost management methods, but they are difficult to overcome their own shortcomings. In order to overcome the defects of these two methods of cost management, in the meanwhile, to find a new way to perfect the cost control system in enterprise, the writer planned to make this study. By analyzing and summarizing the domestic and international research results based on the integration of the Objective cost management and Activity-Based cost management, the writer pointed out the lack of current research and raised from the development, design, procurement, production and service to the full range of “Target-Operation” cost management, and designed three functional modules, including target cost estimate module, operation chain optimization module, cost breakdown and control module and auxiliary module to improve the model's content. This study offers a new way for the managers of enterprises in the field of cost control system and strengthening enterprise competitive power.
Temperature Error Compensation New Method of MFL Sensor to Oil-Gas Pipeline Corrosion Inspection
Authors: Ma Zhong Li , Liu Hong Da
Published: February 2011

Magnetic flux leakage (MFL) inspection is a common method for detecting inner corrosions of oil-gas pipelines; the Hall Effect element is the core sensor of MFL inspections. The Hall sensor is sensitive to temperature, so environmental changes will lead to output error of Hall sensors. In order to compensate for temperature errors of Hall sensors, a segment of oil-gas pipeline with diameter 6 inch was taken as a research object. A fusion model including 50 Hall sensors and 1 temperature sensor was built up, and a functional link artificial neural network optimized by the artificial immune algorithm was used to fuse the output data of the multiple sensors. The lab research results show that the artificial immune algorithm can improve training speed and precision of the functional link neural network; the model built up can compensate effectively for temperature errors of Hall sensors and under the conditions of changing temperature, the precision of magnetic flux inspections of pipelines to detect corrosions can be improved significantly.
Improving Business Processes by Visual Workflow Platform
Authors: Cao Lang Cai , Luo Jian
Published: February 2011

With ever-changing and fast-changing in current business environment, traditional business process is more and more incapable to meet the demand to share information, visualize both high-level and detailed process data, track status and expedite business processes. To address these challenges, the visual workflow platform is introduced. As proven by an industrial case, the workflow platform can greatly help business units to improve work efficiency.
An Enhanced Business Model in Audio-Book Industry
Authors: Liu Dan , Li Sheng Chen , Chen Hui
Published: February 2011

In western countries, “Business Platform” is considered the most successful model to operate audio-book market. We provide an enhanced business model that introducing watermark for copyright protection enhancement. The enhanced model will both increase the profit of audio-book industry and give an impulse to industrial expansion even it has some disadvantages as well.
Coupled Electro-Thermal-Mechanical Micro-Hotplate-Based for Micro Gas Pressure Sensor
Authors: Jin Ren Cheng , Shao Ming Liang , Meng Li Sha , Tang Zhe Nan , Wang Jia Qi
Published: February 2011

In this paper, electro-thermal-mechanical theoretical analysis of micro-hotplate-based micro gas pressure sensor is carried out, which is on basis of the classical heat transfer theory and rarefied gas dynamics. Combined with micro-hotplate (MHP) theory analysis of heat transfer and thermal-mechanical finite element modeling, electro-thermal-mechanical coupled analysis of theoretical models with regard to the MHP-based micro gas pressure sensor is built. Then, through the ANSYS-one of the finite element analysis software-the simulation analysis of MHP went well. The simulation results show that MHP generates a smaller deformation because of adding the thermal conductivity, and MHP provides a more feasible analysis method in the theoretical study of micro hotplate.
The Excitation of Control for Variable-Speed Constant-Frequency DFIG
Authors: Song Le Peng , Xing Siyuan , Zhang Rui
Published: February 2011

The excitation control system of variable speed constantfrequency(VSCF)doubly-fed induction generator(DFIG)for wind turbine was developed，the excitation controller was achieved using fuzzy-PID control. Based on these，the variable-speed constant-frequency DFIG running in the whole working wind speed range is studied by simulations．Fast response, small overshoot, high precision, strong adaptability and highly robustness are obtained by the proposed strategy．
The Section Line of the Cutting Edges of the Rotary Burs after CNC Controlled Grinding
Authors: Liu Hu Ran
Published: February 2011

A study is made of the forming theories and the computer aided design of the rotary cutting burs, for the purpose of finding the movement of the machining system and the corresponding sectional curvature of the groove conveniently. The equation of the cutting edges on the tool surface is deduced in this paper. The contact condition between the cutting edge of the tooth of the cutter and the grinding wheel is found, and the equation of the contact condition is deduced as well. Then the section line of the cutting edges of the rotary burs after CNC controlled machining is calculated. The research is useful for the programming of the CNC grinding on the CNC controlled machine tool.
The Nonlinearity during Start-Oscillation of Thermo-Acoustic Instability in Rijke-Type Combustor
Authors: Li Guo Neng , Zang Chen Yang , Li Kai
Published: February 2011

In order to study the nonlinearity during the start-oscillation of thermo-acoustic instability, an experimental setup was built. The growing process of nonlinearity during the start-oscillation of thermo-acoustic instability was captured and analyzed. Experimental results revealed that after a suitable resonance mode corresponding to the structural of the combustor was selected, the pressure perturbations inside the combustor grow in amplitude into a very large amplitude and self-excited oscillation in a very short period of time. Then, slowly, the nonlinear effects adjust the shapes of pressure waveforms and amplify the oscillations. Ultimately, a limit-cycle oscillation with smooth and uniform pressure waveforms was obtained, and the acoustic waves exhibit only the main resonance mode, damping other modes of instability.
Removal of Xylenol Orange from Solutions by γ-Cyclodextrin-Grafted Carboxymethyl Cellulose
Authors: Xiong Xiao Li , Shao Chen Bin
Published: February 2011

The potential to remove xylenol orange (XO) from aqueous solutions through adsorption on γ-cyclodextrin-grafted carboxymethyl cellulose (CCMC) was investigated in batch experiments. The effects of contact time, adsorption temperature and initial XO concentration were discussed. Results of batch experiments showed that CCMC exhibited some sorption capacities towards XO. It was found that isotherm fitted Languir and Freundlich models for the adsorption of XO on CCMC. On the basis of the Langmuir analysis, the maximum adsorption capacities were determined to be 29.9, 27.1, 21.9, 16.2 and 16.1 mg of XO per gram of CCMC at 283, 288, 293, 298 and 303K, respectively. The negative values of free energy change indicated the spontaneous nature of adsorption.
Study of a Scheme of E-Lottery Scratch-Off
Authors: Sun Xiao Han
Published: February 2011

Lottery scratch-off game is popular in our lives. However, most studies of E-lottery concentrate on the E-lottery that has a purchase period before tombola, few studies focus on E-lottery scratch-off. In the scheme proposed in this paper, lottery sale website and independent third party sort the E-lotteries by the random sort method based on natural enumerative system and encrypt the E-lotteries sorted randomly with pseudo random sequence which is generated by utilizing the combination of discrete logarithm method and chaos mapping method. Random sort method and encryption with pseudo random sequence can prevent lottery sale website, independent third party and lottery player forging legal lotteries. Moreover, lottery sale website and independent third party add identifiers in E-lotteries to prevent repeating fulfillment of bonus.
Performance Analysis of the First Absorption Heat Pump System Driven by Steam
Authors: Zhao Qi , Wang Chen , Tan Yu Fei
Published: February 2011

A sea source adsorption heat pump system driven by steam was put forward in this paper. A mathematic model of the system was established with thermodynamic method by appropriate assumptions.Three parameters were chosen for analysis the system.The results shows that the lower heating temperature,higher sea water circulation temperature and steam pressure will improve the system parameters especially on the conditions of low te and high tc. It may be very useful for design and operation of the absorption heat pump system driven by steam.
On Localization Using Location Fingerprints and Energy Efficient Operation of WLANs in Indoor Areas
Authors: Zhou Mu , Xu Yu Bin , Krishnamurthy Prashant , Ma Lin
Published: February 2011

This study focuses on the power efficient localization by fingerprinted KNN algorithm in the indoor wireless local area network (WLAN) environment. To the best of our knowledge, although the fingerprint algorithm has been utilized to supply some special location based service (LBS) with high precision and accuracy, these associated location systems have resulted in significant energy consumption. Therefore, serious attention should be paid on the energy consumption because of the hundreds to thousands of access points (APs) with high-density deployed in our university campuses and corporate offices. In response to this compelling problem, we discuss the relationship between energy costs and radio map-based location performance for the Gaussian radio signal strength (RSS) distribution with different neighboring points in KNN. Furthermore, using our results, the guidelines on the power efficient fingerprint location algorithm is also provided.
Stochastic Vibration-Based Fragility Analysis of Middle-Story RC Frames
Authors: Zhu Jian , Tan Ping
Published: February 2011

A lot of reinforced concrete (RC) frames have being collapsed during Si Chuan Earthquake (SCE) in western China May 12th.2008, at the same time others have being injured on several levers. In recent years how to evaluate reliability and fragility of the buildings and search reasonable design practice of seismic strengthening of these buildings is urgent mission. One goal of fragility analysis is set up relation between vulnerability and seismic intensity. A set of stochastic earthquake waves compatible with the response spectrum of China seismic code selected to represent the variability in ground motion. Dynamic inelastic time history analysis was used to analyze the random sample of structures. In the end structural weak position also be pointed as valuable consultation for diagnose these buildings and fragility curves of typical middle-storey RC frames of China was obtained finally.
Dynamic Removal of CO2 on MDEA-Loaded SBA-15 for Biogas Upgrading
Authors: Xue Quan Min , Liu Ying Shu , Huo Peng
Published: February 2011

A promising adsorbent for CO2 removal was prepared by introducing methyl-diethyl-amine (MDEA) into mesoporous silica SBA-15 using impregnation method. The MDEA modified adsorbents were characterized by X-ray powder diffraction (XRD) and nitrogen adsorption/desorption. Surface area, pore size and pore volume of MDEA-modified SBA-15 adsorbent decreased with the increasing of MDEA loading, while the loaded MDEA could not change the structure of the adsorbents. The adsorption performance of CO2 on the adsorbents was conducted in a dynamic setup. Dynamic adsorption performance changed with change of the amount of loaded MDEA. In addition, not only the adsorbent was regenerable by purging with the purified gas, but also the adsorption performance is stable in adsorption cycles. The results indicated that the MDEA modified adsorbents were novel for removing CO2 for biogas upgrading.
Adsorption of CO2 and N2 on Coal-Based Activated Carbon
Authors: Deng Hua , Yi Hong Hong , Tang Xiao Long , Ning Ping , Yu Qiong Fen
Published: February 2011

Adsorption equilibrium data for CO2 and N2 on coal-based activated carbon were obtained at 323.15, 348.15, 363.15 K and at partial pressures from 100 Pa to 82425 Pa by a volumetric apparatus. Lower temperature is helpful for the adsorption. It was observed the saturation loadings at 323.15 K are 0.3 mmolg-1, 0.057mmolg-1 for CO2 and N2, respectively. The Langmuir and Sips equations were used to correlate the experimental data. It was found that the Sips equation is more accurate to describe the adsorption behavior of both gases on activated carbon. Henry’s constant was calculated, it proves that activated carbon has a high selectivity on CO2 than N2, the maximum separation index is 5.5.
Characteristics System of Supply Chain Emergencies Based on Case Statistical Analysis
Authors: Liu Jun , Dong Qian Li
Published: February 2011

Supply chain emergencies (SCE) are a kind of emergencies in the operation of supply chain, with the features of sudden-breaking, wide-impacting, serious-effecting and etc. In order to find out the inner regulation of SCE, this paper, using the method of statistical analysis, sums up the connotation of SCE and puts forward the characteristics system of SCE on the basis of the collected 243 (from the year of 1988 to 2009) SCE cases,. The characteristics system of SCE is composed of fundamental attributes, general characteristics, main characteristics, secondary characteristics and corrective measures. As the characteristics system of SCE is concluded from a lot of actual SCE cases, the conclusion is very representative.
Fetching Address Book Info of iPhone OS
Authors: Luo Zhi Feng , Sun Chao , Wu Shun Xiang
Published: February 2011

With the rapid development of mobile technology, the mobile phones has gradually become an indispensable part in everybody’s life, and it is replacing the computer’s position step by step. The iPhone is a smart phone made of Apple Company, which opens a new era of software for mobile devices. At the same time, iOS(iPhone’s operating system) has become one of most competitive mobile communications operating systems. The Apple’s protection for security makes the iPhone owners hardly control their phone through the root (highest authority). It is so difficult to manage the information effetely with iPhone, such as contacts’ information or SMS. The paper introduced two approaches to get the contacts’ information in iPhone and restore them with vCard. At last, we managed the output file on MAC.
Structure and Properties of Soybean Milk Modified Polyacrylonitrile Fiber
Authors: Jia Zhao , Yang Yan Gong
Published: February 2011

After a series of chemical procedures of surface hydrolysis, acidchloride reaction and grafting, Polyacrylonitrile (PAN) fiber was grafted from soybean milk and the soy protein-modified PAN fiber was obtained. The structures and morphologies of the grafted fiber were characterized by Fourier transform infrared spectroscopy (FTIR), X-Ray diffraction (XRD) and scanning electron microscope (SEM).The results show that the surface of PAN fiber was covered by soy protein overlay film. Moisture absorption and mechanical properties were investigated. The grafted PAN fiber presented better hygroscopicity and still meet the requirement for wearing.
The Measurement and Evaluation Method of Global Error of Spiral Bevel Gear
Authors: Zhao Hua , Sheng Piao
Published: February 2011

This paper offers a method of spiral bevel gear’s global error measurement and evaluation based on three-coordinate measurement according to the characteristics of spiral bevel gear. The 3d solid modeling built in UG was regarded as the gear’s ideal factor of measure and error evaluation; the values of the measured points in the real gear tooth surface by CMM were regarded as the gear’s real factor. The global error of spiral bevel gear was reflected by the difference surface which was fitted by the deviation between real tooth surface and theoretical tooth surface. This method is very effective and feasible by measuring and evaluating the automobile rear axle’s driven gear.
An ICA and GM Model for the Innovation Ability Evolution
Authors: Lv Xuan Li
Published: February 2011

A three-stage architecture constructed by combining independent component analysis (ICA), gray correlation coefficient analysis (GCCA) and grey model GM(1, N) is proposed for evolution region innovation. In the first stage, ICA is used as feature extraction. In the second stage, GCCA is used as main factors select. In the third stage, GCCA is used to evolution innovation ability. The paper applies the ICA, grey relational analysis and grey non-linear regression analysis to study the factors affecting the ability of independent innovation in Chinese industrial enterprises from the empirical perspective. It is shown that the proposed method achieves is effective and feasible. And it provides a better estimate tool for the innovation activity. It also provides a novel way for the evolution design of the other engineering.
A Comparative Study on Two Kinds of 3D Direct Capacitance Imaging Sensors
Authors: Yan Hua , Ning Xiu Kun , Zhou Ying Gang
Published: February 2011

Two kinds of sensor structures for 3D direct capacitance imaging are presented. 12 electrodes are arranged in three planes each with four electrodes. Every four electrodes on each plane are rotated 45° (sensor 1) or 0° (sensor 2) with reference to the previous. A comparative study between the two sensors shows that although the difference in sensor’s sensitivities and outputs is obvious, the difference in reconstruction images isn’t apparent, at least for some permittivity distribution. The output range of sensor 1 is smaller than that of sensor 2, thus sensor 1 is better than sensor 2 in terms of the design of a capacitance measuring circuit. Both sensors can achieve 3D direct capacitance imaging with a good axial resolution.
An Electrical Capacitance Tomography System with Double Measurement Channels
Authors: Yan Hua , Wang Jun , Zhou Ying Gang
Published: February 2011

An ECT data acquisition system usually has N-1 measurement channels or single measurement channel. In order to solve the contradiction between system speed and system cost, a 16-electrode electrical capacitance tomography system with double measurement channels has been designed. It has good anti-noise ability and stray-immunity by using ac-based capacitance measuring circuits. A switch network is used to set each electrode at excitation mode, detection mode or idle mode. The influence of switch coupling capacitances is discussed and its soft compensation method is proposed. By using LabVIEW, remote monitoring and distributing data or images over network can be implemented easily.
Blind Signature Based on Discrete Logarithm Type Cryptosystem
Authors: Zhou Xuan Wu , Fu Yan
Published: February 2011

Discrete logarithm problem is an important trapdoor function to design asymmetric cryptosystem, and some fast public key cryptosystems have been designed based on it. In the paper, we introduced fast asymmetric cryptosystem into the designing and analyzing of blind signature, and presented improved blind signature schemes based on ECC (Elliptic Curves Cryptosystem). The trapdoor function of the blind signatures is based on ECDLP (Elliptic Curves Discrete Logarithm Problem), and the algorithms of the scheme make full use of the superiority of ECC, such as high efficiency and short key length. The improved blind signature schemes can achieve the same security level with less storing space, smaller communication band-width and less overheads regarding software and hardware application. Furthermore, the algorithms in the schemes can be generalized into other public key cryptosystems based on discrete logarithm problem without any influence to efficiency or security.
Research on Microcomputer Relay Protection Anti-Interference of 500kV Transmission Line in MATLAB
Authors: Kang Wei , Chen Xing , Gui Jian Ting , Zhang He , Zhang Li Xia
Published: February 2011

This paper established a 500kV microcomputer protection model with EFT/B generator. The generator was built based on the mechanism of arc forming and distinguishing when cutting off the no-load transmission line. The according parameters were set by the arc estimating formula and test data. The simulations shows that the traditional disincentive measure is limited for high voltage line and the arithmetic is still sensitive to the disturbance and made the relay set false operation. A comprehensive measure is put forward and tested by the microcomputer protection arithmetic.
Research on Semantic Web-Based Teaching Resources Management System
Authors: Li Wen Jie , Shi Sha Sha
Published: February 2011

Because the traditional teaching resources management systems are limitations on the description and acquisition of distributed heterogeneous knowledge, domain ontology knowledge base of teaching resources management has been built with the help of experts in the field. A new algorithm of concept similarity has been proposed for calculating the distance between the words, and the ontology has been searched by using Jena API. Finally, the model of system has been implemented. Although the ontology storage method and execution efficiency should be improved, the system has got the initial achievement for the research of ontology in teaching resources management domain.
Gear Damage Detection Using Impulse Response Wavelet Transform
Authors: Li Hui
Published: February 2011

A novel method for detection the gear wear fault according to impulse response wavelet transform is presented. The continuous wavelet transform is widely recognized as an effective technique for rotating machine fault detection using vibration signal since it can be used to detect both stationary and transitory signals. This advantage makes it very suitable for the detection of singularity generated by localized damage in gearbox. In this study, the impulse response wavelet time-frequency joint representation is used to diagnose the gear wear fault. The experimental result shows that impulse response wavelet time-frequency joint representation is a sensitive indicator of the existence of damage in the gearbox.
A WT-Based Edge Detection with Adaptive Threshold
Authors: Zhang Deng Yin , Xiao Li , Bo Shun Rong
Published: February 2011

The existing edge detection algorithms with wavelet transform need to artificially set the threshold value and are lack of flexibility.To salve the limitations, in this paper, we propose a WT(wavelet transform)-based edge detection algorithm with adaptive threshold, which uses threshold value iteration method to achieve adaptive threshold setting. Comparison of experiment results for the CT image shows that the method which improve the clarity and continuity of the image edge can effectively distinguish edge and noise, and get more completely information of the edge. It has good application value in the fields of medical clinical diagnosis and image processing.
Gear Fault Detection Based on Angle Domain Average and Teager Kaiser Energy Operator Demodulation Technique
Authors: Li Hui
Published: February 2011

A new approach to gear localized fault diagnosis under run-up based on angle domain average and Teager Kaiser energy operator demodulation technique is presented. The non-stationary vibration signals are transformed from the time domain transient signal to angle domain stationary one using order tracking technique. Teager Kaiser energy operator is a nonlinear operator that can track the signal energy and identify the instantaneous frequency and instantaneous amplitude of mono-component signal. The instantaneous frequency and instantaneous amplitude both exhibit a characteristic signature in the presence of a cracked tooth. The experimental result shows that angle domain average and Teager Kaiser energy operator demodulation technique can effectively diagnose gear localized crack fault.
The Software Design of Underwater Acoustic Remote-Control Coding System
Authors: Zhang Kai , Shang Kun
Published: February 2011

This paper is mainly concerned about the theoretical argument from Software design, which is based on underwater acoustic remote-control communication system of low-power signal chips and the simulation study on its core algorithms and its implementation on hardware system. Each command needs 125ns to be executed, while the master frequency of this filter is 8MHz, so it cannot deal with the signal processing synchronously. This process can only start after all the code elements are stored, which takes 2 seconds. However, the filter is so economic in energy that this micro-power system is endowed with a broad prospect in remote-control application, where the demand for synchronicity is not high.
Synthesis, Crystal Structure and Antibacterial Activity of One-Dimensional Chain Calcium (II) Complex
Authors: Tai Xi Shi
Published: February 2011

A new Ca(II) complex material has been prepared and characterized by elemental analysis, IR and single-crystalX-ray diffraction. The results showed that the compound the calcium ion lies in seven-coordinated environments, belonging to monocapped trigonal prism geometry. The complex formed one dimensional chain structure through intramolecule and intermolecule hydrogen bonds and π-π stacking interaction. The antibacterial assay of the Ca(Ⅱ) complex was tested using a modified version of the 2-fold serial dilution method. The results show that the complex shows considerable antibacterial activity against escherichia coli, bacillus subtilis and staphylococcus white.
The Optimal Design of Logistics Distribution Network with Pre-Sale Period of High-Value and Time-Varying Product under E-Commerce
Authors: Liu Si Jing , Zhang Jin , Li Guo Qi
Published: February 2011

Within the context of the different product types and marketing strategies involved in ecommerce transactions, this paper suggested that high-value and time-varying products (HVTVP) made up the core of the market. These products are characterized by high brand recognition, high market price, price decay over time, and stable physical properties. This paper analyzed the structure of the pre-sale period of HVTVP and described the pre-sale period by dividing it into distinct functions. Based on this analysis, it discussed the characteristics of the logistics distribution network during the pre-sale period and established a decentralized bi-level programming model for the logistics distribution network of HVTVP within this period. This model was solved using an interactive fuzzy algorithm, which was tested and verified through numerical analysis.
A Novel Routing Algorithm Based on Path Stability and Energy Aware
Authors: Zhang Fan , Cao Ye Wen
Published: February 2011

As the core of routing protocols, route selection algorithm plays the key role in the scenario of quick mutability of the network topology. In mobile ad hoc networks, node mobility has been one of the dominant factors which cause the loss of performance so that the path duration and stability has to be taken into account. On the other hand, energy awareness for computation is becoming another crucial parameter. In this paper, a novel routing selection algorithm has been proposed without any additional device (such as GPS). Path stability based on stability change ratio and energy awareness has been jointly considered in this proposed algorithm. In order to verify the correctness of the proposed solution an enhanced routing protocol based on AODV named EN-AODV has been presented. Simulation results show that the performance of EN-AODV is better than that of traditional AODV and NCR-AODV in terms of normalized routing load, packet delivery ratio and nodes death rate.