bluuebunny/crossref_metadata_2025 huggingface dataset:
A Study on the Energy Balance Ant-Based Routing Algorithm for Wireless Sensor Network
Authors: Han Jing , Chen Dong Ya
Published: July 2014

How to make good use of the limited energy to maximize the network life span is an important problem of the wireless sensor network. The life of WSN depends on the minimum of the residual energy of its nodes. A fair energy balance routing algorithm is proposed which uses the Ant Colony Optimization Algorithm (ACO) to balance the network energy distribution and extend the network life. The proposed algorithm utilizes the dynamic adaptability and optimization capabilities of the Ant Colony to get a tread off between the shortest path and the fair energy balance. Simulation results show that the proposed algorithm is good at balancing the energy, and it effectively extends the span of the network life.
Study on Focused Crawler's Application in Searching Petroleum News
Authors: Sun Lei , Bian Min
Published: July 2014

The paper aims for the application of focused crawler in the petroleum news topic crawling, studies the related technologies of the focused crawler, and put forward a crawling engine strategy and review strategy on the petroleum news topics, adopt different extracting methods for different types of pages through web page classification, and design a corresponding link topic correlation calculating method for the crawling engine strategy; test and verify the above-mentioned crawling engine strategies through experiments, and the experimental results show that the strategy can greatly balance its accuracy and width for focused crawler.
Research on Method of CIM-Based Data Exchange for Electric Power Enterprise
Authors: Zhou Yun Cheng
Published: July 2014

A novel CIM-based approach is proposed to realize power enterprise data exchange under heterogeneous IT circumstance. CIM objects encoding specification by XML is introduced in this paper. The object is expressed by XML complex element, and the object’s properties are encoded by simple elements embedded in complex one. In order to solve some data interchange problems, a CIM/XSD schema which applies on CIM data syntax and data validation verification is established by using XML Schema Definition (XSD) technology, and an attribute group “AssociationAttributeGroup” is designed to serialize complex relationships of CIM objects. The attribute group provides syntax support for marshaling linkages of objects in certain two methods: “embedding” and “referring”. The two operators: serialization and deserialization are added to each CIM class. By this way, the CIM objects can make quickly and bidirectional alternation between memory objects and CIM/XML document. The algorithms of the two operators are designed in detail, which can implement complex object set bidirectional conversion efficiently. The case study shows that the CIM object encoding specification, the CIM/XML schema and the algorithms of serialization functions can be applied to exchange and share CIM data in electric power enterprise.
Analysis of Passive Residual Heat Removal System at Primary Side when Station Blackout Occurs
Authors: Liu Jun Teng , Cai Qi , Cao Xia Xin
Published: July 2014

This paper regarded CNP1000 power plant system as the research object, which is the second-generation half Nuclear Reactor System in our country, and tried to set Westinghouse AP1000 passive residual heat removal system to the primary circuit of CNP1000. Then set up a simulation model based on RELAP5/MOD3.2 program to calculate and analyze the response and operating characteristic of passive residual heat removal system on assumption that Station Blackout occurs. The calculation has the following conclusions: natural circulation was quickly established after accident, which removes core residual heat effectively and keep the core safe. The residual heat can be quickly removed, and during this process the actual temperature was lower than saturation temperature in reactor core.
Application Research of Gas CCHP System to Hotel Buildings in Shanghai
Authors: Gu Qun Yin , Yan Jia Chen , Wu Cui Yu , Chen Hai Yan , Song Ying , Zhao Xiao Dan
Published: July 2014

In this paper, case of hotel in Shanghai was studied, and three kinds of CCHP import solutions are discussed by this algorithm based on real working condition parameters of thermoelectric load. Then, put forward the relative conclusions based on comparison of each scheme and calculation of power supply benefits and heating benefits, from the point of power supply economics and heating economics. So it has certain realistic meaning for the application of CCHP system in city hotel buildings.
Experimental Study on Effect of Contamination on Electric Field Distribution of 330kV Composite Insulator
Authors: Wen Ding Jun , Zhang Xiu Bin , Chen Hong Gang , Jiang Feng , Sun Ya Ming
Published: July 2014

330kV transmission line in the northwest region of China is much complex while pollution flashover is a major threat to the safe operation of the system. In this paper, experimental study on effect of contamination on electric field distribution of 330kV composite insulator is presented. High voltage test system of 330kV composite insulator is established according to the ratio of 1:1. Surface electric field and potential of the insulator is measured using GDC-100 optical fiber voltage electric field measuring instrument. Potential, electric field distribution of the two kinds of 330kV composite insulator are tested in different environment of clean, dry and uniform pollution layer. The test and simulation result is also compared.
Introduction of the Assessment Model of Nuclear Safety Culture
Authors: Zuo Jia Xu , Xu Xu , Chai Jian She , Zhang Chun Ming , Jing Jian Ping
Published: July 2014

The nuclear safety became the more important after the Fukushima accident. The development of nuclear safety culture is one of the most effective methods to improve the safety. Also the assessment shows the level of the nuclear safety culture. The nuclear safety assessment model is described. The assessment model was described from its time and space, and it was also discussed from macro and micro levels. The internal and external environment parameters are considered and the assessment of different levels of safety culture is described. According to established principles of nuclear safety culture, the selection rules of the different levels evaluation indicators of nuclear safety culture are discussed too. And it is pointed that the assessment of nuclear safety culture is a long time project and an integrated system.
MPC Based Approach for Reliable Power System Energy Management with High Penetration Level of Renewable Energy Resources
Authors: Zhang Yan , Guo Bo , Zhang Tao
Published: July 2014

This paper discusses using the battery energy storage system (BESS) to mitigate intermittency and sustain stability of distribution system integrating high penetration level of renewable energy resources (RER). The goal of the control is to have the BESS provide as much smoothing as possible, so that the RER power can be dispatchable in some kind and reliable. The effectiveness of model predictive control (MPC) based approach proposed in this paper have been tested by detail case study, also compared with the day ahead control strategy, load following strategy , and normal situation without energy storage which are usually used before. The result shows that the proposed MPC based approach is more practical, and more robust.
Power Control of Microgrid with Rich Small Hydropower Stations
Authors: Xing Yu Hui , Zhu Gui Ping , Xia Yong Hong , Xin Jian Bo
Published: July 2014

In China, some remote areas with rich small hydropower stations suffer from a tradeoff between water surplus and off-limit voltage in the grid during wet seasons. The microgrid of new energy sources provides a new way of solving this problem. Under the background of the microgrid proposed in somewhere of Jiangxi Province, this paper firstly carries out simplified model on the actual system. Output models of PV and small hydropower stations are established. Then with Minimizing transmission losses of microgrid system and the amount of all small hydropower abandoned waters as the optimization objective, and considering the output constraints of each micro power source, power balance constraints and voltage constraints. A micro-power output optimization model is established and then solved by improved particle swarm optimization algorithm. By comparing the micro-power output and system line loss before and after the optimization, it verifies that the proposed power control method can prevent the off-limit voltage effectively and reduce transmission losses of the system.
Reactive Compensation Research of HVAC Cables for Offshore Wind Farms
Authors: Dui Xiao Wei , Zhu Gui Ping
Published: July 2014

This paper proposes a reactive compensation optimization method for HVAC cables of offshore wind farms, establishing the optimization model of reactive compensation capacity of HVAC submarine cables with cable current-carrying capacity as the main constraints. The maximum transmission power and transmission distance of HVAC submarine cables are calculated, considering the constraints including power factor, line loss and reactive compensation cost. Using minimum average annual cost as the objective function compensation capacity of both cable ends and corresponding average annual cost is obtained are optimized.
Research on New Energy Industrial Upgrading in Tianjin Based on SWOT Analysis
Authors: Yang Qi Qi , Han Fang Xu
Published: July 2014

The development of new energy industry is one of the important breakthroughs to solve energy and environmental issues and fulfill commitment to the international community for China. SWOT analysis was used to study the new energy industrial upgrading in Tianjin in this paper. By analyzing the strengths, weaknesses, opportunities and threats of the development of new energy industry in Tianjin, the current situations and problems were summarized, in order to provide reference for the practice of new energy industrial upgrading in Tianjin.
Effect of the Concentrations of the Reactants on Electrochemical Performance of Composite Cathode Material LiFePO4/C
Authors: Ma Xiao Ling , Zhang You Xiang
Published: July 2014

FePO4·2H2O nanoplates are synthesized by a hydrothermal method, using Fe (III) compound as the iron source and are lithiated to LiFePO4/C by a simple rheological phase mathod. The structure, morphology and electrochemical properties of the FePO4·2H2O nanoplates and LiFePO4/C composites synthesized by changing the concentration of the reactants were characterized in detail by X-ray (XRD), scanning electron microscope (SEM), high-resolution transmission electron microscope and electrochemical measurement. The LiFePO4/C nanoparticles lithiated from the FePO4·2H2O nanoplates when there were about 10 mmol Fe3+ in 20 ml water solution demonstrates excellent cyclic performance.
Short-Term Wind Power Dynamic Prediction Based on GA-BP Neural Network
Authors: Ke Ting Jing , Chen Min You , Luo Huan
Published: July 2014

This paper proposes a short-term wind power dynamic prediction model based on GA-BP neural network. Different from conventional prediction models, the proposed approach incorporates a prediction error adjusting strategy into neural network based prediction model to realize the function of model parameters self-adjusting, thus increase the prediction accuracy. Genetic algorithm is used to optimize the parameters of BP neural network. The wind power prediction results from different models with and without error adjusting strategy are compared. The comparative results show that the proposed dynamic prediction approach can provide more accurate wind power forecasting.
Smart Grid in China
Authors: Wei Shi
Published: July 2014

The concept of Smart Grid is created this century, with the focus of whole world. With the social development, the requirement of power security is growing fast. China, as a great power towards to industrialized country, its requirement is more intense. This paper introduces the generation of the concept ‘smart grid’, as well as the inevitable trend of future development, plans of China for smart grid construction and some achievements, finally explains the advantages of China's smart grid development and prospects of the future.
Spatial Electric Load Forecasting Based on Least Squares Support Vector
Authors: Li Yan Bin , Li Yun , Cao Le , Li Wei Guo
Published: July 2014

This paper proposes a new spatial load forecasting method for distribution network based on least squares support vector machine. The method adopt data, the characteristic of which is similar with forecast sample, to training in order to obtain the regression coefficients and bias, which we need to do the forecasting.Atthe same time,compare with artificial neural network model,The least squares support vector machine transforms quadratic programming problems into linear equations, thus avoiding the insensitive loss function, greatly reducing the computational complexity and further improving the accuracy of the prediction model. Finally, the effectiveness and practicality are verified by examples.
Effect of UV Radiation on HTV-Silicon Rubber under Different Humidity
Authors: Yi Chun Fang , Shi Qian , Liang Pei Song
Published: July 2014

Along with our country " west-east electricity transmission " project and UHV projects,HTV-silicon rubber has been more and more widely used in the western regions of China,such as xining, Lhasa, hami and other regions, has strong solar radiation, long sunshine time, but the region environment humidity conditions are different. Therefore, it is necessary to study the Effect of UV Radiation on HTV-Silicon Rubber under different humidity. In this paper, the extraction of relative humidity variable, under different humidity conditions,HTV silicone rubber material taken for artificial ultraviolet aging experiment, to explore under different humidity conditions,HTV silicone rubber material’s ultraviolet aging properties. Experimental samples of artificial ultraviolet aging experiment taken in static contact angle test, hardness test, fourier transform infrared spectroscopy (FTIR) analysis, then integrate the test data and make theoretical analysis.The experimental results show that both samples hardness are larger, the flexibility are reduced; their both surface static contact angle are decreased, the hydrophobic are part of the loss; their both surface roughness are bigger,and a part of filler is leaked; FTIR of peak area of Si-CH3 and Si-O-Si keys absorption peak are reduced, shows a portion of the Si-CH3 and Si-O-Si keys is interrupted into free radicals; UV radiation has a certain influnce on HTV silicone rubber.Humidity variable has two contray sides influence on ultraviolet aging characteristics of HTV silicone rubber material,its process is complicated.
Electro-Catalytic Performance of Different Pt/Ag Ratio on H2O2 Electro-Reduction for Direct NaBH4-H2O2 Fuel Cell
Authors: Yang Ting Fang , Zheng Dan , Yu Zao Xi
Published: July 2014

In this paper the different proportional Pt/Ag on XC-72 carbon are studied to serve as the electro-catalysts of H2O2in acid media. All catalysts are prepared by impregnation reduction method and characterized by XRD and TEM. The electrochemical performance tests are examined by cyclic voltammetry (CV) at 25°C and 30°C, respectively. The results suggest that the peak current density increases with increasing the Ag content in Pt-Ag/C. Attributed to the temperature factor, the electro-catalytic activity of all catalysts at 30°C is better than that of 25°C.
Theoretical Line Loss Calculation of Distribution Network Considering Wind Turbine Power Constraint
Authors: Li Ke , Sun Zhen Quan , Wang Meng
Published: July 2014

This paper presents a theoretical line loss calculation of distribution network containing an uncertainty power of wind turbine. First, this paper establishes the theoretical line loss mathematical model considering wind turbine power constraint within the sampling period. Then this paper gets multi group wind turbine output data satisfied the power constraints through Monte Carlo simulation. By combining with the first power coefficient method and Monte Carlo simulation technique, this paper also generates multi groups load pseudo measurement test of non real time. By combining the real-time measurement of power flow calculation, a group of simulated data with minimum error between the power flow results and the real time measurement are selected. Finally based on the selected pseudo measurement, the theoretical line loss within the given time period based on periodic accumulative calculation of real-time measurement are calculated. 14 nodes example is given to verify the accuracy and practicality of the algorithm.
Transient Stability of Wind Power System with DFIG
Authors: Guo Li Sa
Published: July 2014

Analyzed mathematical model of wind power which consist doubly-fed wind turbine (DFIG).Strategies for pitch angle control were developed.Used MATLAB to establish equivalent model contain infinite power system concluding DFIG ,The results showed that wind power with DFIG have good transient stability.
Vulnerability Assessment Method for Distribution Network
Authors: Ren Xiao , Liu Jun , Wang Ya Fang
Published: July 2014

. This article is based on the concept of vulnerability for power system, and focuses on vulnerable source of distribution network and summarizes the characteristics of vulnerability assessment methodologies and inadequate for the distribution network.And pointed out that domestic and international research for distribution network vulnerability is still in the initial stages,evaluation of existing methods are accessible only from one side distribution system's security status,the vulnerability assessment methodology of distribution network can be more fully reflected the global distribution network of security that will be researched in the future.
Probe on Questions and Mode of Renewable Resource Development and Utilization on Small Islands
Authors: Zhao Yun Peng , Jiang Hai Bo , Cheng Zheng Qing
Published: July 2014

Aiming at small islands location limits and the established power grid characteristics, the paper analyses some practical problems to be dealt with when renewable resource is utilized. Combined with the characteristics of small islands, the paper puts forward the new mode without energy storage devices, and designs a renewable resource application system driven directly by photovoltaic devices, emphatically analyses the key technology of no energy storage mode. The new mode effectively resolves the battle neck problem of traditional off-net mode.
System Optimization Model and Path Analysis for Sustainable Development of Coal Industry
Authors: Yu Xiao Xia , Gao Jian Guo , Liu Yi Zheng
Published: July 2014

China's increasing demand for energy, the energy development and utilization patterns of traditional high exploitation, high emission and low use, not only caused a serious waste of resources and environmental damage, but also is difficult to meet the needs of economic development and facing the industry crisis of survival. Entered a new period of development, the coal industry how to get out of a resource conservation and production intensive road of sustainable development becomes an important strategic task. In this paper, by constructing and using efficiency of coal resources optimal allocation model and path analysis for the sustainable development of coal industry, circular economy, as a kind of advanced development model to promote the coordinated development of resources, environment and economy, becomes the inevitable choice of the coal industry to explore a new road to industrialization.
The Research on Seismic Performance of Tower under Icing Condition
Authors: Tian Yu Chen , Xue Wei Jian , Zhou Ying , Jiang Lan
Published: July 2014

Southwest area of china is the zone of the transmission lines which often happens icing disaster. It is also an earthquake-prone area, also influenced by the interaction between ice and earthquake. This article uses the finite element method (fem), establishing three-dimensional model for steel towers in southwest china, to analyze the dynamic performance of the ice condition and the analysis of seismic action. The aim is to get internal forces for steel towers under the action of earthquake and deformation law along with the change of ice thickness.
Calculation of Capacitance and Inductance Parameters of Transformer Winding under very Fast Transient Overvoltage
Authors: Li Yan , Li Yang , Guan Yin Jun , Li Tian Yuan
Published: July 2014

The distributed parameters of transformer windings are indispensable in analyzing the transients particularly caused by the very fast transients which occur at the time of disconnecting switch operations in GIS. Winding insulation structure and the safe and stable operation of the transformer are determined by the accuracy of the calculation. In this paper, finite element method (FEM) is used to model and simulate the electromagnetic field calculation of winding capacitance and inductance parameters. The simulation calculation results are consistent with the experimental measurements on a transformer model, which verifies this method is feasible.
The Analysis and Countermeasures for the Influencing Factors of Power Grid Engineering Electromagnetic Environment
Authors: Zhang You Quan , Wang Fei , Wang Shao Can , Wang Qing , Zhang Xiao Lei
Published: July 2014

In light of the increasingly prominent environmental problems and disputes of the power transmission transformation engineering, analysis many of the environmental impact of 500 kV power transmission transformation engineering, introduce the related standards of electromagnetic environmental impact, focusing on the analogy analysis and theoretical prediction for the electromagnetic environment around typical 500 kV power transmission transformation engineering , analysis the condition of the power frequency electromagnetic field and radio interference which generated by power transmission transformation engineering effects on the environment. put forward the countermeasures and technical measures to solve and alleviate the problem of environment .
Heavy Metal by Zero-Valent Iron and Natural Zeolite Partitioning in Acid Mine Drainage: A Comparative Study
Authors: Cai Chang Feng , Jiang Lin , Wang Feng Li , Qi Fu Zhang
Published: July 2014

In this study, two different bed materials in media filter systems were examined. Natural zeolite has the ability to take up heavy metals (Cd, Zn) from acid mine drainage (AMD) as well as zero-valent iron (ZVI). The aim of the study was to estimate the ability to remove heavy metals of Natural zeolite and compare the efficiencies of the two media. A major purpose of this report was to determine which media would have a higher permeation rate after running a period of time. It was concluded that ZVI had a higher efficiency of taking up heavy metals (>96.5%) and a faster permeation rate which had a longer operating life.
The Research of Energy Efficiency Construction Design with Pollution Control Consideration
Authors: Guo Hai Qing
Published: July 2014

Focusing on the architectural proper distribution problems with low energy consumption, this paper analyzes the architectural distribution model and builds the architectural landscape target location distribution model with pollution control consideration. According to the features of the architectural landscape pollution control, the paper analyzes the architectural landscape target location distribution model with differentiations and finds the optimal distribution with less pollution for the architectural landscapes. The Oealcle spatial is used to describe the relationship model of the vegetation objects in the landscapes in order to obtain the optimal distribution model for the architectures with differentiations. The simulation experiments illustrate the proposed model can appropriate distribute the architectural landscapes with differentiations with better pollution control effects.
Reliability Assessment of the Small Sample Aero-Engine Bearings
Authors: Ding Feng , Yin Jiu Cheng , Dang Jun Qiang
Published: July 2014

Aiming at the test of Aero-engine bearing is expensive, small sample without failure, and bearing life obeys Weibull distribution, small sample data is introduced in order to estimate the reliability of bearing with the method of Bayesian point estimation. The weighted least squares method is utilized to estimate the shape and scale parameters of Weibull distribution in the case of no failure. The bearing cumulative failure function, failure rate and average life can be gotten. Finally, the bearing experiment data is used to verify the validity of the small sample evaluation. It is proved that the method has an important value for the replacement and maintenance of Aero-engine bearing.
Hydrogen Desorption/Absorption Kinetics of MgH2 Catalyzed with TiO2
Authors: Wang Yan , Wu Shi Wei , Yu Hao , Gong Na Na , Cao Zhong Qiu , Zhang Ke
Published: July 2014

We report on the preparation and hydrogen desorption/absorption kinetics of nanocrystalline magnesium hydride (MgH2) added commercial TiO2by high-energy ball milling. The phase and composition of the as-milled powders are characterized by X-ray diffraction (XRD). The results show that the milled sample contained MgH2phase, small amount of Mg and various phases of TiO2such as tetragonal and orthorhombic structure. The effect of the milling time (10, 20 and 30 h) on the hydrogen desorption property of MgH2has been investigated and found that the milling time of 20 h has excellent dehydrogenation properties, which can release 3.3 wt% H2within 60 min at 300oC, which indicates that the kinetics of hydrogen desorption of MgH2-TiO2composite has been greatly enhanced compared to the pure MgH2. Moreover, hydrogen absorption kinetics of the sample milled 20 h has been studied and the hydrogen content is 0.7, 0.8 and 1.2 wt% H2at 250, 280 and 300oC within 60 min, respectively.
Study on Desorption Temperature of Adsorption Bed in Typical Weather Conditions
Authors: Zhang Hua , Ji Xu , Li Ming , Fan Jie Qing , Luo Bin , Leng Cong Bin
Published: July 2014

In this paper, the desorption temperature of adsorption bed in typical weather condition is studied though the solar adsorption refrigeration experiment with conditions of different weather. The results showed that: the better the weather condition is, the higher the highest temperature of the adsorption bed is, so the better the effect of desorption is. No matter in cloudless sunny or partly cloudy sunny conditions, the desorption temperature of adsorption bed can reach 93.4°C, and the amount of desorption also will be larger; however, in cloudy weather conditions, desorption temperature can reach 88.5°C, and desorption quantity is relatively fewer than it in cloudless sunny days.
Research on the Energy Recovery of the Excavator Slewing System Based on Hybrid Technology
Authors: Wang Dong Yun , Zhang Yu
Published: July 2014

In the traditional excavator, the slewing braking energy cannot be recovered and eventually became heat. As the hybrid technology was introduced into the hydraulic excavator, it makes energy recovery possible. In this article, a new energy recovery method based on hybrid, using an electric motor instead of a hydraulic motor to drive the swing mechanism. When braking, the electric motor will enter the generator mode and the energy will be recovered and stored in super-capacitors. This method has been proved to have high energy recovery efficiency.
Research on the Noise Comprehensive Management of HVDC Converter Station
Authors: Ye Chun Yan
Published: July 2014

HVDC converter station noise problem is getting attention by the relevant departments. The noise of converter stations is mainly generates by the converter transformers, smoothing reactor, AC and DC filter and valve outer cooling fan equipment, on this basis, the converter station noise control must be integrated into a variety of factors. In this paper, the noise source control, noise propagation route control and protection noise receptor were studied and explored.
Investigating on the Flow Distribution of a Planar Solid Oxide Fuel Cell Stack
Authors: He Huan Huan , Zhang Shun Dong , Zhang Qiang , Su Shi Chuan , Wang Bo , Zhang Wan Li
Published: July 2014

In this paper, a realistic 3D numerical model is established to investigate the flow distribution of a 10-cells short planar SOFC stack. The effect of the basic geometric parameters, such as the sub-manifold radii () and the single channel width (), on the stack flow uniformity is examined. And the results and discusses are presented in this paper. This investigation for the SOFC stack holds great significance for the SOFC stack commercialization.
The Design and Calculation of 500 Kv Transmission Line RPC Double Pole Based on the ANSYS
Authors: Wang Long Shi , Li Xu , Song Xiao Bing
Published: July 2014

Reactive Powder Concrete (RPC) material has good performances such as great strength, good durability and good stability,Therefore it has higher application value.In this paper, We design and calculate theoretically for the transmission lines of RPC door type double pole , and use the finite element analysis software ANSYS analysis the RPC double pole. Then we compare the results of numerical calculation we have get with the theoretical calculation results .It turned out that the RPC pole in the 500 kv transmission line designed application is feasible.
Thermal Analysis of Gas Insulated Bus Based on Multiple Species Transport Technique
Authors: Zhang Yang , Shao Cui Ling , Tian Shuang Shuang
Published: July 2014

The temperature field distribution is a most important part we pay close attention to when gas insulated bus is designed. In this paper, finite element method is employed to calculate the temperature rise of gas insulated bus based on fluid governing equation and heat conduction equation. The problem of convection heat transfer between fluid and solid is solved by multiple species transport technique which provides convenience for the calculation of convection heat transfer coefficient. The solution region includes SF6 gas, ambient air, conduct and tank whose electrical and thermal properties are dependent of temperature. Analysis result illustrates that the thermal field distribution is symmetrical, the lowest temperature is at the bottom of the tank, while the highest temperature is on the top of the conductor.
Synthesis of Nano-Branched Ni/Fe Layered Double Hydroxides
Authors: Wang Tian Lei , Liu Mei Tang , Liu Xiao Juan , Ma Hong Wen
Published: July 2014

Novel nanobranched Ni/Fe-LDHs were successfully prepared by coprecipitation method without adhesive condition. The effects of different factors as pH and aging time on its morphology were discussed in detail. According to the results, the branches diameters of Ni/Fe-LDHs are among 50-100nm and the optimum experiment pH equals 10 and experiment time is 48 hours. Therefore, the nanobranched Ni/Fe-LDHs can be expected to be potential for designing and investigating novel materials.
Research of CoSiN Film as Diffusion Barrier in ULSI-Cu Metallization
Authors: Zhang Zai Yu , Wu Ma Jia , Chen Xiu Hua
Published: July 2014

CoSiN film can be used as diffusion barrier layer in ULSI-Cumetallization.CoSiN/Cu/CoSiN/SiO2/Si films are prepared by magnetron sputtering technology. Four-point-probe, SGC-10,Atomic forced microscopy (AFM) are used to detect the resistivity,film thickness and surface morphology. It is investigated the barrier performance of CoSiN film for Cu metallization in sub-45nm technology. The results shows that the resistivity and the components ofCoSiN/Cu/CoSiN/SiO2/Si film do not have the obvious change after being annealing at 550°C in Ar atomosphere, and CoSiN film can keep good barrier performance for Cu line. This multi-film shows good thermal stability .
Microstructure and Mechanical Properties of an Al-Cu-Mg-Fe-Ni Alloy
Authors: Liu Hong Wei , Wang Feng , Xiong Bai Qing , Zhang Yong An , Li Zhi Hui , Li Xi Wu , Huang Shu Hui
Published: July 2014

The microstructure and mechanical properties of the Al-2.24Cu-1.42Mg-0.9Fe-0.9Ni alloy were studied using optical microscopy (OM), scanning electron microscopy (SEM), X-ray diffraction (XRD), and tensile tests. The results indicate that the microstructures of the as cast alloy involve α-Al matrix, Al/Al2CuMg eutectic structure, Al7Cu2Fe, Al7Cu4Ni and Al9FeNi compounds. The tensile test results indicate that the alloy at elevated temperature (200°C) displays superior tensile strength due to the presence of the thermally stable Al7Cu2Fe, Al7Cu4Ni and Al9FeNi compounds.
A Combined Composition Design for Metallic Glasses from Thermodynamic and Structure Rules
Authors: Yang S.Z. , Han X. , Zhao J. , Ji X.
Published: July 2014

A composition design method from thermodynamic and structural rules for metallic glasses is proposed in this paper. Using the above composition design method, BMG compositions could be determined quickly and it could guide the development of new amorphous alloys. Several new amorphous alloys were fabricated with this new method in Cu-Zr-Ti and Cu-Zr-Al alloying systems. Since this composition design provides a method of determination from both thermodynamic and atomic structure factors, this method increases the accuracy of the amorphous alloy composition design and reduces the development of new amorphous alloy error rate.
Supporting Technics of Easily Mudding and Ultrahigh Roadway in Soft Coal Rock
Authors: Zhang Zhen
Published: July 2014

According to the situation of the great height wall, soft and weak surrounding rocks and sliming characteristics of the 15# coal west-third panel sump in the Gushuyuan mine, the deformation characteristics and mechanism of the sump were analyzed by field survey, laboratory tests and the numerical simulation method. The results show that the sump deformation and failure were determined by its low strength, weakness structural, sliming characteristics and excavation disturbance. The roadway deformation occurs mainly in the middle, upper and lower of the sides and the floor. A comprehensive solution is proposed, including sealing surrounding rocks, strengthening soft and weak surrounding rocks, strengthening the structure stability, improving the surrounding rocks stress environment. This method was applied in the coal mine. Field application results show that this method was suitable for control sump deformation, the maximum roadway roof subsidence is 15 mm, the two sides convergence is 30mm, and the maximum amount of floor heave is 21mm.
Arc Behavior of Dry Hyperbaric Gas Metal Arc Welding
Authors: Li Kai , Gao Hong Ming , Li Hai Chao
Published: July 2014

The arc behavior in dry hyperbaric Gas Metal Arc Welding (GMAW) process was investigated by using a high speed camera system and welding electric signal acquisition system. The arc shape in hyperbaric argon environment of 0.1-2MPa shows quite different characteristic from that at normal pressure. With the increase of ambient pressure, the arc length turns shorter, arc column is contracted, and the arc brightness increases. At elevated ambient pressure, the arc length increases with increasing welding voltage. Arc voltage has a good linear relation with arc length. The sum of the fall voltages at ambient pressure of 0.4MPa, 0.8MPa, and 2MPa is nearly constant which is about 20.2-21.7V. The values of electric field strength of arc column at different ambient pressure were gained through the linear fit, which are increased with increasing ambient pressure. The arc static characteristics at elevated ambient pressure are raising characteristics, and it is shifted upward with increasing ambient pressure.
The Influence of Cutting Parameters on the Cutting Forces when Milling Invar36
Authors: Zheng Xing Wei , Ying Guo Fu , Lu Jia , Yang Ni Hong , Chen Yan , Fu Yu Can
Published: July 2014

An experimental study on milling of Invar36 was conducted by using coated carbide insert to characterize the cutting force. The Taugchi's design of experiment was used for experimentation and the cutting force regression equation was established based on the principles of probability statistics and regression analysis. The results showed that the cutting force was significantly affected by the axial depth of cut and the feed per tooth, and with the increase of the axial depth of cut, the cutting force increased very quickly. Compared with the axial depth of cut, radial depth of cut and cutting speed had less influence on the cutting force. The established regression equation was highly reliable.
Hull Plate Bending Springback Prediction Based on Artificial Neural Network
Authors: Su Shao Juan , Hu Yong , Wang Cheng Fang , Liu Bin
Published: July 2014

In the process of three-dimensional curved hull plate forming, springback caused serious influence on the forming accuracy, in order to ensure the forming quality of the asymmetric multiple pressure heads CNC bending machine of ship hull 3D surface plate, to achieve the automatic processing, it is necessary to solve the problem of springback in the hull plate forming process. It is rarely to see the research on the cold bending springback problem of middle-thickness hull plate now. To established nonlinear model of plate parameters and springback amount based on BP neural network, accurately analyzing the prediction of springback, and getting the sptringback prediction model based on the BP neural network in the Matlab programming.
Analysis on Transient Dynamic Load of Planetary Gear Pair
Authors: Jiang Xian Long , Zhang Suo Huai , Jia Yan Xu , Zhang Hao
Published: July 2014

The geometry of a precise involute NGW planetary gear train has been built by Solidworks, the overall finite element model of planetary gear train has been built in ANSYS Workbench. According to the non-linear finite element contact theory and the finite element theory, instantaneous state mesh of Planetary Gear Pair has been simulated dynamically. And the time curve of the maximum stress strain for planetary gear train and the stress law of the mesh for each gear in different tooth profile were obtained. The variation of stress in different tooth profile of mesh has been analyzed to improve the performance of the planetary gear and reliability to provide some theoretical guidance.
Effects of Uranium(VI) Stress on Physiological Feature and its Accumulation of Chinese Cabbage
Authors: Xie Lei , Tang Wen Ling , Xie Shui Bo , Wang Jing Song , Liu Ying Jiu
Published: July 2014

The growth condition,malonaldehyde (MDA),accumulation of uranium,glutathione (GSH),non-protein sulfhydryl (-SH) and phytochelatins (PCs) in Chinese cabbage subjected to different uranium stresses were investigated.The results showed that Chinese cabbage was sensitive to high dose of uranium concentrations.From the perspective of the adsorption quantity of uranium,the adsorption capacity of uranium in roots was obviously better than in stem and leaf. under 20 mg/L uranium stress,the MDA content significantly increased by 125% than the control group.And the analysis of the non-enzymes indicated that the SH,GSH,PCs played an important role in the process of eliminating uranium poison with the increase of the SH,GSH,PCs under increasing uranium concentrations.
Research on the Microwave-Assisted Supercritical CO2 Extraction of Alkaloids from Gynura segetum (Lour.) Merr.
Authors: Lu Qin Fang , Pan Li Fang , Chen Ming , Qiu Yong , Xie Bao Hua
Published: July 2014

In this study, the alkaloids from Gynura Segetum (Lour.) Merr. were extracted based on the microwave-assisted supercritical CO2 extraction technique. Before extraction, the powder of Gynura Segetum (Lour.) Merr. was firstly soaked with ethanol-water solvent and irradiated by microwave The experimental conditions including ethanol concentration, soaking time and microwave irradiation time were carefully studied, and the best efficiency could be obtained when the ethanol concentration, soaking time and microwave irradiation time were respectively 90%, 10 h and 2 min. Meanwhile, a parallel experiment with only supercritical CO2 extraction was also carried out as a comparison. The results indicated the efficiency of microwave-assisted supercritical CO2 extraction method was better for extracting the alkaloids from Gynura Segetum (Lour.) Merr. samples. Finally, the structures of the crystals extracted from the Gynura Segetum (Lour.) Merr. were analyzed by infrared spectroscopy, and the seneciphylline was found as the main component of the crystals.
Aptamer Biosensor in Microfluidic Chip for Human Thrombin Detection
Authors: Zhang Cong Xiao , Lv Xue Fei , Qing Hong , Deng Yu Lin
Published: July 2014

In this paper, microfluidic chips supply a miniature platform for aptamer biosensor in thrombin detection. The aptamer biosensor was integrated to the microfluidic chip as a recognition element for thrombin detection. Experimental results showed that the aptamer biosensor in microfluidic chip was able to realize the function for human thrombin detection.
Study on the Chaotic Behavior of Smoke Plumes and Fire Trends
Authors: Yang Feng , Pu Jin Yun , Wu Xiang Jun
Published: July 2014

The partial differential equations describing fire smoke plume is deduced from the general equation buoyant jet. Applied Lorenz model to study the chaotic behavior of smoke plumes, discussed the nature of evolution equations within the Prandtl number changes, at the same time the emergence of chaotic solutions for the numerical analysis. Smoke plumes appear chaotic, indicating that the flow state changes from the stable convection to unstable convection, at this condition may produce fire whirlwind, so that disaster to expand. Contact Fire actual process parameters when generating chaotic solution, we propose a disaster prediction and control of ideas.
Double Pulse Modulation on Current Ripple Suppression
Authors: Li Jun , Zhang Jun Hong , Gao Wei
Published: July 2014

In the process of the DC-DC conversion, suppressing the output current ripple is very important. Compared with conventional single pulse modulation mode ,double-pulse modulation can more effectively suppress the output current ripple. By principle analysis, the formula is derived, and finally through simulation proved double pulse modulation can suppress the current ripple effectively.
Simulation of Particle Impact Drilling Nozzles Based on FLUENT
Authors: Ren Fu Shen , Ma Ruo Xu , Cheng Xiao Ze
Published: July 2014

The purpose of particles impact drilling is to increase the rate of penetration when drilling extra-hard and strong-abrasive rocks, where supposed to be time-consuming and costly. Now the technology becomes the world’s most potential drilling technology for deep wells and ultra-deep well. The most important part of the drilling technology is the nozzle which accelerate the particles. The paper introduces the basic four types of the nozzles, and researches the acceleration effect of nozzles based on FLUENT. By concluding the simulation, put up a new structure of nozzle, and simulates the acceleration of the particle of different drilling fluid and particles inlet velocities, discusses how the length of accelerating cavity affect the acceleration.
3-Dimensional Localization System Based on Extension of Beacon Nodes and Segmentation of Coordinate Space
Authors: Lee Dong Myung , Lee Ho Chul , Kim Yun Hae
Published: July 2014

In this paper, the 3 Dimensional (3D) localization system based on extension of beacon nodes and segmentation of coordinate space is proposed and the performance of the system is analyzed. The main functions in the 3D localization system are 1) the equations for calculating the location coordinates of the 3D localization system by intersection of 3 sphere equations; 2) the extension concept of beacon nodes; 3) the compensation scheme for the 3D localization algorithm; 4) calculation of the location coordinate in selected segmented space. The distance error (Derror) between the beacon and mobile node can be derived and it is used to performance metric for proposed system. It can be inferred that 1) LSCA is more stable and reliable system than LSNOCA, and it can be more useful to the practical localization system; 2) The Derror is the smallest value when the segmented distance of 3D space for the 3D localization system is set to be 1m; 3) The Derror when the height of the beacon node is 1.5m is largely lower than when that is 2.3m.
Chinese Sentiment Classifier Machine Learning Based on Optimized Information Gain Feature Selection
Authors: Shi Jin Tao , Liu Hui Liang , Xu Yuan , Yan Jun Feng , Xu Jian Feng
Published: July 2014

Machine learning is important solution in the research of Chinese text sentiment categorization , the text feature selection is critical to the classification performance. However, the classical feature selection methods have better effect on the global categories, but it misses many representative feature words of each category. This paper presents an improved information gain method that integrates word frequency and degree of feature word sentiment into traditional information gain methods. Experiments show that classifier improved by this method has better classification .
Use of the Principal Component Analysis (PCA) to Reduce Data Complexity in Qualitative Research: An Electro-Electronics Case Study
Authors: Lopes Fernanda Perreira , de Paula Lacerda  Santos Adriana , Sotsek Nicolle Christine
Published: July 2014

The objective of this paper was to show that the Principal Component Analysis (PCA) quantitative technique is capable of grouping complex variables in correlation groups from qualitative research. Thus, the study proposes a set of indicators for evaluating the production area in electro-electronic transformation industries in the city of Curitiba and Metropolitan Region, under aspects of environmental, social and economic sustainability. By employing the technique, it was observed that the questions were well formulated and truly measured what was proposed by the researchers. However, the way the variables were grouped needs adjustments to facilitate application of the questionnaire and the tabulation and analysis of data.
Research on Intelligent Shift Strategy of Automatic Transmission
Authors: Zhang Guo Xin , Li Min , Wei Xia
Published: July 2014

The control technology of automatic transmission is mainly to solve the decision problem of shift strategy, namely according to the factors of intention of the driver, vehicle running state, road conditions and the principle of the optimal vehicle performances, determine the best gear. This paper mainly studies shift strategy under different driver intention, different driving condition of the vehicle, different use of vehicle.
Synthesis, Characterization and Photophysical Properties of a New CuI Complexe Contain Bis[2-(diphenylphosphino)phenyl]ether and 1,2-diphenyl-1H-imidazo[4,5-f][1,10]phenanthroline
Authors: Li Qiang , Zhong Rong Feng , Li Le , Wang Min , Zhao Feng
Published: July 2014

In this paper, a new diimine ligand of 1,2-diphenyl-1H-imidazo[4,5-f][1,10]phenanthroline (D2) and its corresponding CuI complex [Cu(D2)(DPEphos)](PF6) (P2)contain Bis[2-(diphenylphosphino)phenyl]ether were synthesized and characterized by 1H NMR successfully. Experimental data confirm that Complex P2 is high-energy-emitting one with the emission maximum locates at λ = 582 nm.Compared with P1, It seems that the introduction of phenyl group system lead to 13 nm red shift of emissive energy, and the effect is obvious.
Megawatt Wind Turbine Hydraulic Brake System Locking Device Modeling and Research Based on AMESim
Authors: Tian Hong Fu , Yan Li Wen , Ai Cun Jin , Xie Hui
Published: July 2014

As a megawatt-class wind turbine braking system, in addition to brake, it should also be in place with a wind wheel locking device to ensure that the failure of the braking system in the normal case fan will not burst start again.To solve the problem the article has designed a hydraulic locking device, and USES the AMESim software on the research and analysis.