bluuebunny/crossref_metadata_2025 huggingface dataset:
Risk Assessment of Heavy Metals Pollution for Rosa sterilis and Soil from Planting Bases Located in Karst Areas of Guizhou Province
Authors: Yang Hao , Hu Ji Wei , Huang Xian Fei , Zhou Chao , Li Ling Yun , Fan Ming Yi
Published: December 2014

Heavy metals (Hg, As, Pb, Cd, Cr, Cu) pollution in soil samples of Rosa sterilis planting areas located in Wudang District in Guiyang and Pingba County in Anshun was studied using a new evaluation theory of pollution loss rate, and following a series of methods for Rosa sterilis leaf including over standard rate, enrichment coefficient, single pollution index and comprehensive pollution index, the heavy metals pollution of the two Rosa sterilis planting areas was analyzed and evaluated. The results showed that the soil comprehensive pollution loss rate ranged from 12.73% to 28.26% in Wudang District samples, most of which belong to light pollution level. The comprehensive soil pollution loss rate of the sampling points in Pingba County varied from 9.68% to 16.10%, which belong to fairly clean level. Meanwhile, the experimental results for the Rosa sterilis leaf showed that the contents of Cr and Pb in both planting areas exceeded the permissible limit, while other elements were below the safe limit. The six heavy metal elements in Rosa sterilis leaf did not accumulate.
Wind Turbine Failure Rate Calculation Method Considering Multi-Factor Influences
Authors: Wong Yun Kai , Zhang Jian Hua , Shi Kai Tuo
Published: December 2014

In the traditional outage model, the failure rate of the wind turbine is often given as a long-term statistics value on average, that is only one value for a wind turbine, this calculation method is not reflect the real reliability level of wind turbines. According to historical failure data, the factors that affect the wind turbine outage are divided into several categories. Based on Markov Process, the calculation methods for wind turbine failure rate under single factor and multi-factor are given respectively. On this basis, the calculation methods for wind turbine failure rate under different levels of single factor and multi-factor are given respectively based on statistical analysis method. Because different factors are taken into account in the failure rate calculation, the failure rate will change according to the actual factors and then it could reflect the real risk level of power systems when uses this failure rate. Simulation calculation is carried out on a real wind farm; the results show the effectiveness of this proposed method.
Model for Evaluation of Water Quality Base on Improved Wavelet Neural Network
Authors: Yu Zhi Wu , Ren Jin Xia , You Xin
Published: December 2014

The nonlinear and uncertain of water environmental pollution,make the traditional water quality evaluation methods have limitations.In order to improve the accuracy of water quality evaluation,The paper put forward the water quality evaluation model based on improved wavelet neural network (Wavelet Neural Network, the WNN).Optimize the initial weights of wavelet neural network based on Adaptive Genetic Algorithm (Adaptive Genetic Algorithm, AGA),and then training the network by used wavelet neural network algorithm,finally,testing the trained network.The simulation results show that the combination of Adaptive genetic algorithm and wavelet neural network improved the efficiency of network training,and this method can be used in water quality evaluation, and the evaluation result has high precision and accuracy.
Study of Red Mud as Compound Sulfur-Fixing Agent
Authors: Yang Qiao Wen , Zhao Xin Wei , Ren Yan Jiao , Yang Jin Hua , Chen Si , Wu Wan , Xia Li Ken
Published: December 2014

The research has revealed the problem of sulfur dioxide emissions during the coal combustion. Combustion experiments were made for Shanxi coal at 1000oC. Red mud, carbide and shell powder were chosen as the primary sulfur-fixing agent. Through the experiment, the best ratio of Ca/S is 2.0 at 1000oC. When the ratio of red mud, carbide and shell powder were 50%, 15% and 35%, the maximum sulfur-fixing efficiency was 76.05%. Orthogonal experimental results showed that the best additive formula was 9% of Fe2O3, 5% of Na2CO3, 5% of ZnO. The maximum sulfur-fixing efficiency reached 89.23%. In addition, it was made thermogravimetric analysis of coal with different additives. By contrast, samples with sulfur-fixing agent generated two-stage combustion significantly, ignition point increased. The amount of coal residues with sulfur-fixing agent and sulfur-fixing additives showed an increase in the quantitative analysis.
Similar Constructive Method of Solution for the Model of Nonlinear Spherical Seepage in Composite Reservoir
Authors: Zhang Feng Jiu , Xiao Xu Xia , Li Shun Chu , Gui Dong Dong , Wang Qiang
Published: December 2014

The nonlinear spherical seepage flow model has been established for the composite reservoir model. The nonlinear spherical seepage flow model considers the well produce at a constant rate, and the quadratic gradient term under three outer boundary conditions (closed, constant pressure and infinite). Firstly, through variable substitutions, the seepage flow equation is linearized; then the model is transformed into the boundary value problem of an ordinary differential equation by employing the Laplace transform method. It has been confirmed that the Laplace space analytic solutions of such boundary value problems has a formula under different external boundaries, using the Similar Constructive Method(it is a simple and effective new idea for solving this class seepage flow model, complicated calculus calculation is avoided). The prospect of this new method is promising for understanding and studying the inherent laws of fluids flow.
Erosion-Corrosion Behavior of Hydraulic Perforating Equipment during Fracturing
Authors: Long Shi Ming , Wang Wei , Zhang Mian , Cui Lu , Dou Yi Hua
Published: December 2014

Erosion-corrosion behavior in downhole tubulars and oilfield ground gathering transferring system is interesting in optimum design. This work is addressed to investigate erosion-corrosion behavior of hydraulic perforating equipment during fracturing. The typical fracturing fluid of 0.2% hydroxypropyl guar gum solution mixed with quartz grain was selected. The relationship between erosion-corrosion rate and flow displacement, the effect of the flow impact angle on erosion-corrosion rate is performed on a jet impingement experimental apparatus. In the experiment situation, the erosion-corrosion rate reaches highest at the impact angle of 45°. The erosion-corrosion rate increased exponentially with the increase of flow displacement. The surface morphology of specimen suffer from erosion-corrosion is analyzed by scanning electron microscopy (SEM) to characterize the erosion-corrosion damage mechanisms.
Factors Contributing to Haze and the Influence on External Insulation of Power Equipments
Authors: Gao Song , Zhou Zhi Cheng , Yang Lin Jun , Liu Yong , Tao Feng Bo , Zhang Long
Published: December 2014

Haze-fog has been a severe pollution weather phenomenon in China due to a large number of emissions of pollutants with the rapid development of economy. The areas burst haze are usually coincidence with high density of electricity transmission line corridor or power load areas, and so the pollution flashover accidents happen frequently. In this paper the haze pollution situations and factors contributing to haze are introduced, and the mechanisms of haze inducing and aggravating the pollution flashover accidents are explained by analyzing the temporal and spatial distribution of PM2.5 and size characteristics of dust deposited transmission. Moreover, the influences of haze on power transmission and transformation equipment external insulation are discussed with combining the simulation pollution flashover experiments of high conductivity fog.
Numerical Simulation of Cavitation Flow Field in a Francis Turbine Runner with Attached Blades
Authors: Zhang Si Qing , Ma Guo Hua , Qian Jing
Published: December 2014

The numerical simulation of cavitation flow field in a Francis turbine runner with attached blades was conducted based on the no-slip mixture model in the Euler approach and theSinghalcavitation model. The RNG model after correcting viscosity and the pressure correction algorithm (SIMPLE) were supplemented. The distributions of the water-vapor volume fraction under non-design conditions were obtained. The results show that the method based on two-phase mixture model can be used to simulate the position and degree of cavitation flow in Francis turbine.
Projective Modeling of Hydraulic Turbine Draft Tube Elbow Part Based on Pro/E
Authors: Zhang Yun Long , Zhang Si Qing , Wang Dong , Li Dan
Published: December 2014

According to the CFD numerical simulation of hydraulic turbine internal flow and simulation calculation of vortex and cavitation of draft tube, and in the three dimensional modeling and analysis of the draft tube elbow is found that commonly modeling methods are tedious process, there is more deviations, not conducive to modify the part size and flow over a smooth. This article proposes a projective modeling method to avoid some drawbacks of traditional methods; the modeling process is convenient and concise, easy to modify the local size, flow more smoothly, and achieve more accurate simulation process.
Study on Maximum Power Point Tracking Algorithm of Automobile Exhaust Thermoelectric Generator
Authors: Quan Rui
Published: December 2014

Considering the soft output performance of automobile exhaust thermoelectric generator (AETEG), an AETEG using Buck based DC/DC converter were established, based on the duty ratio disturbance observation method, an improved maximum power point tracking algorithm (MPPT) named adaptive hill climbing algorithm was present, including its principle and flow diagram. The simulation result based on UDDS driving cycle proves that the practical power of AETEG can follow its theoretic maximum output power, the algorithm has advantages on the dynamic and steady performance of AETEG in the MPPT.
The Application of Green Vernacular Building Technology in the Folk House Construction: Using the Case of Folk House Reconstruction in Lushan County of Sichuan Province as an Example, after the Earthquake Disaster
Authors: Ye Yin Lin , Bai Wen Feng
Published: December 2014

The sustainable construction of folk houses needs extremely the support of green vernacular architectural technology. Taking the after-quake reconstruction in Lushan of Sichuan province as an example, the bamboo structure, some new technologies like new adobe technology etc. are intending to be used in the folk houses recovery and reconstruction, in order to improve the earthquake-proof property of the local buildings and to improve the living environment of the local people. These technologies combine with the local traditional construction methods of local folk house construction will make the construction process more localizing, greenness and ecology, in order to realize the sustainable construction of folk house construction in the region.
Disaster Resistance and Emergency Evaluation of Urban Power Grid
Authors: Liu De Xian , Zhang Jian Hua , Jiang Cheng
Published: December 2014

The purpose of this research is to assess the ability to resist disasters of urban power grid, find the vulnerabilities of system and put forward the evaluation results and improvements. Firstly, according to the actual disaster relief demand of urban power grid, the fault tree analysis method is proposed in this paper to analyze the causes of the accident and in accordance with this to establish the evaluation index system of capacity to prevent disasters of urban power grid. Secondly, the analytic hierarchy process (AHP) which is based on exponential scale is used to collate and calculate the indicators in the evaluation process of disaster resistance of urban power grid. The research achievement is helpful to recognize the grid’s vulnerabilities and reduce the risk of accidents caused by disasters in urban power grid’s planning and construction of disaster resistance.
Study on the Lightning Current Amplitude Distribution in Shenzhen Power Grid
Authors: Huang Wen Wu , Xiao Ming Jie , Liu Yu , Wang Wei , Yao Sen Jing , Yang Xu , Wen Xi Shan
Published: December 2014

According to the lightning monitoring data recorded by lightning location system of Guangdong power grid in the past 10 years (from 2003 to 2012), we gain the lightning parameters of Shenzhen power grid and fit the lightning current amplitude distribution curve. The research results show that the fitting expression format of the lightning current amplitude distribution gotten from lightning location system adopted by IEEE is better than that adopted by national power industry regulations. And the lightning current in Shenzhen area ranging from 20kA to 40kA shows obvious packing effect. It’s recommended to take anti-accident measures in the weak sections of mountain areas to improve the shielding failure lightning protection performance.
Effect of Beating on Paper Physical Strength of OCC
Authors: Hu Xing , Zhao Chuan Shan , Yang Hui Rong , Han Wen Jia
Published: December 2014

This paper mainly discuss the effect of beating on OCC pulp fiber morphology and paper physical Strength. After the treatment with PFI, the beating degree were ranged from 25 ° SR rises from 56 °SR, the fiber morphologies were greatly changed, and appeared splitting and brooming. Physical results showed that beating can improve strength properties of OCC pulp in the proper degree, 46°SR was the best result in this study.
Determination of N-Heptyl Pyridine Tetrafluoroborate in Acetonitrile Using UV–Spectrum
Authors: Huang Tao , Tian Peng
Published: December 2014

Ionic Liquids is called also room temperature molten salt, its performance is mainly dependent on composition of cation and anion, and through molecular design the adjustment. And the traditional organic solvent, water, supercritical fluid and chemical reaction than solvent, ionic liquid in the following several aspects to show its prominent advantages. N-heptyl-pyridine tetrafluoroborate is prepared by the double decomposition reaction of HEPB and NaBF4. The ionic liquid at room temperature used in the experiment has a significant absorption determined by UV spectrum within the range of 200-400nm, the maximum absorption wavelength of HEP-BF4 ionic liquid in acetonitrile is 240nm. The standard working curve of HEP-BF4 ionic liquid is y=0.04518+0.03124X (R=0.99963). The linear range of HEP-BF4 ionic liquids in the acetonitrile is 1-75 mg/L. The recovery rate of HEP-BF4 ionic liquid which is between 95.9% and 102%, is measured by standard addition method in acetonitrile.
Difference of Cell Morphology on Different Callus Types of Alfalfa
Authors: Hu Yan Yan , Yang Jing Hui , Zhang Chao , Liu Ting , Li Bin , Wang Ying
Published: December 2014

In order to induce embryo from callus and set up the integral somatic embryo induction system from monoclonal cell, the differences of cell morphology and structure from different types of alfalfa callus were observed and compared by quick section and microscopic examination. The results show that giant callus cells were larger, elongated and yellow-white; loose callus cells were smaller, spherical, soft and yellow-green; hard-type callus cells were round, hard and dark green. The cell volume of giant callus was 4.5 times more than loose callus cells and 9 times more than hard-type callus cells. The biggest change of vacuole number and form were giant callus cells, which had 48%cells of 5-8 big vacuoles. Loose callus cells had 89%cells of 2-4 small vacuoles and hard-type callus cells had 97% cells with one large central vacuole. Loose callus cells had more chloroplast, which were 4.65 times more than giant callus cells. The chloroplast of hard-type callus cells was gathered into groups, which had 3-5 chloroplasts in it. The most nucleuses of giant callus cells and loose callus cells were located in the central of cell and 96.8% nucleus of hard-type callus cells were located on the edge. In hard-type callus cells there were different number of rings, thread and textured ducts. In short, there were lower cell differentiation and clearer vacuolization in giant callus, and high degree of differentiation and tissue aging in hard-type callus. The loose callus was undifferentiated, was lower on vacuolization and apparent on characteristics of embryonic callus, so that it was more suitable for induction of somatic embryos.
Optimizing the Extraction Process of Rubusoside from the Rubus Suavissimus: A Cellulase Pretreatment Approach
Authors: Zhu Xiao Hong , Xia Ming , Yang Chun Xing
Published: December 2014

The paper discussed the extraction process of rubusoside from Rubus suavissimus using a new technique named cellulase pretreatment approach. First, the parameters of cellulose which generate the optimized condition for the extraction of rubusoside from Rubus suavissimus were identified. Under the most optimal condition, the extraction efficiency is maximal. The parameters include pH value,temperature and enzyme-substrate ratio. Second, single factor experiment and an orthogonal test then could be conducted to obtain the optimized condition for the extraction process with the assistances of cellulose. The parameters under the optimized condition were determined as following: ethanol as solvent, 1.2% cellulose, 40°C, pH 4.8 and duration 25 minutes. The result shows that the extraction efficiency of rubusoside is 10.81%.
Preparation and Characterization of N-Octyl Pyridine Tetrafluoroborate
Authors: Tian Peng , Kang Yan Hong , Liu Li Yan , Lu Jie
Published: December 2014

Ionic liquids combine a set of proper ties like non-flammability, non-volatility, high ionic density and intrinsically high ionic conductivity; they also behave as good solvents for various chemical and electrochemical processes. These attributes make them appealing as alternative materials to replace conventional solvents, wherefore the interest in ionic liquid based materials for diverse electrochemical devices has boosted in the last few decades. The halogenated hydrocarbon and pyridine are used in the preparation of room temperature ionic liquid intermediates bromided N-octyl pyridine OPB, and the intermediate infrared spectrometer are used in chemical structure characterization, so it is determined that the product is the room temperature ionic intermediates OPB. Infrared spectrometer for the structure characterization is used, it is proved that OP-BF4 room temperature ionic liquid has been gotten. Both solvent polarity and acid alkali have an influence on ultraviolet spectrum diagram displacement of room temperature ionic liquid. If the ultraviolet spectrum diagram of ionic liquids and other solvent mixed solution is studied, it is necessary to indicate which solvent is used.
Determination Content of Zinc Element in Natural Huazi Mushroom by ICP-AES
Authors: Liang Wan Ting , Tian Peng
Published: December 2014

Zinc is an essential trace element, zinc content in human body is 1.4~2.3g, is widely distributed in various tissues, including skeletal and skin are more, the nutritional status of zinc content in hair Znn reflect the long-term supply of dietary zinc level and human zinc. Using the high pressure nitrifying pot method and wet method and treatment of samples were determined in natural Huazi Mushroom samples Zn element content. High pressure nitrifying pot method relative standard deviation of Zn element is 5.82%; Wet method to determine the relative standard deviation of Zn elementt is 4.81%. Visible high pressure nitrifying pot method and treatment of samples of precision of the measuring precision and wet processing samples are relatively low. By comparison, high pressure nitrifying pot method specific humidity method to deal with the sample good measuring precision, higher accuracy, and the measurement process to save time.
Modified Clay Adsorbent for the Adsorption of Cd2+ Research
Authors: Sheng Jiao , Yan Shu Mei , Feng Xian , He Ai Cui , Zeng Gui Hua
Published: December 2014

The modified clay have excellent adsorption performance. This paper discussed the adsorbent dosage, pH, temperature, adsorption equilibrium time and so on the influence of factors on the adsorbent adsorption performance, the results show that the microbial fermentation of rice bran to Cd2+ has good adsorption effect. The best adsorption conditions for: dosage of microbial fermentation of rice bran 18 g/L, temperature 30 °C, pH = 3.8, Cd2 + mass concentration is lower than 50 mg/L, the adsorption equilibrium time 30 min, adsorption rate can reach 93.5%, and its application foreground is prospected in wastewater treatment.
Determination Content of N-Octyl Pyridine Tetrafluoroborate in Water Using UV-Spectrum
Authors: Zhang Cheng Cheng , Tian Peng , Chen Qing Yang
Published: December 2014

Ionic Liquids is called also room temperature molten salt, its performance is mainly dependent on composition of cation and anion, and through molecular design the adjustment. And the traditional organic solvent, water, supercritical fluid and chemical reaction than solvent, ionic liquid in the following several aspects to show its prominent advantages. OP-BF4 ionic liquid is prepared by the double decomposition reaction of OPB and NaBF4. The ionic liquid at room temperature used in the experiment has a significant absorption determined by UV spectrum within the range of 200-400nm, the maximum absorption wavelength of OP-BF4 ionic liquid is 255nm. The standard working curve of OP-BF4 ionic liquid is y=0.06476+0.00967X (0.99918). The recovery rate of OP-BF4 ionic liquid which is between 96.4% and 102%, is measured by standard addition method in water. The quantitative analysis of OP-BF4 ionic liquids in water using ultraviolet spectroscopy is simple, accurate and reliable.
Utilization of Coal Mine Water
Authors: Shao Ai Jun , Wang Shi Wen , Chai Lin Lin , Wang Qiang , Liu Ying , Yang Song
Published: December 2014

China is a big country of coal production, in the coal mining process, the great massive mine drainage has caused not only the waste of groundwater resource, but also environmental pollution. On the other hand, mining production and life supply water is very scarce. According to the mine water features, the majority of mine drainage water belonging to the mine water containing suspended, the mine water needs to do the necessary purification then can be used. What the purification mainly eliminates is the suspended. In this paper, the method of purification and the technological process about mine water are discussed. The main methods of handling are coagulation, sedimentation, filtration and disinfection. According to different characteristics of water quality, different ways of handling and technological processes have to be chosen. Finally, the purification and utilization of mine water are shown through practical examples, Pingdingshan Coal Group Company, Wannian Coal Mine of Fengfeng Group Limited Company and Tangshan Coal Mine of Kailuan Group Company, to have obvious social, economic and environmental benefits.
Study on Adsorption Removal of Humic Acid in Water by Modified Clays
Authors: Wang Yu Heng , Xiong Ying , Zhang Jing Nan , Zeng Yue Ting , Chen Ji Rui
Published: December 2014

In this study, three kinds of natural clay minerals (kaolin clay, montmorillonite and diatomaceous earth) were used to treat the raw water containing humic acid (HA) by adsorption/sedimentation. The results indicated that natural kaolin clay had no obvious effect on removing HA in water. Using chitosan to modify montmorillonite and diatomaceous earth, the removal effect of the modified diatomaceous earth for HA was better than modified montmorillonite, and the optimal ratio between chitosan and diatomaceous earth was 1:30. Compared with natural diatomaceous earth, the modified clay had better adsorption property for HA at the same dosage. Using modified diatomaceous earth, the maximal removing rates for TOC and turbidity could respectively reach 85.9% and 64.6% with 60 mg/L dosage and 50 min.
Irregular Striped Vegetation Patterns in Arid and Semiarid Regions Resulted from Oscillatory Instability
Authors: Huang Tou Sheng , Zhang Hua Yong , Zhang Fei Fan
Published: December 2014

Striped vegetation pattern formation in arid and semiarid regions has attracted many researchers in ecological field. In this research, we modify the classical Klausmeier model and study nonlinear mechanism of oscillatory instability which can also possibly lead to pattern formation in ecological systems. Via simulation, irregular striped vegetation patterns are numerically obtained for the modified model. From the mechanism of oscillatory instability, this research provides a theoretical explanation for the formation of irregular striped vegetation patterns in nature.
No-Load Grid Connection Control Strategy of Double-Fed Induction Generator in Wind Power Generation System
Authors: Xu Bo Qiang , Zhang Shu Yi
Published: December 2014

A control strategy and implement method for the no-load cutting-in of double-fed induction generator in power system are introduced. The paper analyze the basal principle of DFIG under no-load condition, and build the correspondent mathematical model. Then according to the model, the paper propose a control strategy on the basis of magnetic flux linkage vector orientation control. Using simulation software set up a simulation model. The result of simulation showed that: the no-load grid connection control strategy can effectively keep the stator voltage track the time-varing grid voltage. At the interconnection instant, the impulse current is almost zero, thus the soft cutting-in of DFIG is well realized.
Forest Seed Loam Cutting and Collecting Machine
Authors: Cui Bao Jian , Kong De Gang , Jiang Hai Yong , Liu Jiang Tao , Li Yu Ling , Yi Jing Gang
Published: December 2014

In view of the field work environment of artificial larch forest in the mountains, The forest seed Loam cutting and collecting machine is designed for adapting to the mountain woodland inter-row work environment. The machine finishes completing the soil cutting and collecting through a homework, meeting the job requirements, and the operation is simple、the ability is strong, it can meet the need of mountain forest farm.
Design and Experimental Study on the Vibration Subsoiler
Authors: Liu Xiao Hong , Yu Yan , Qiu Li Chun
Published: December 2014

The objectives of this work are to evaluate the performance and analyze the factors which could be having an influence of vibration subsoiler in cultivation, and to envisage and design the measurement and control system based on the existing research in the soil bin test platform. The system consisted of three distinct subsystem: a subsystem for controlling subsoiler based on a AC variable frequency motor at oscillating frequency of 0-60Hz and amplitude of 10mm, a ‘complicated box’ subsystem for getting data from various sensors which were distributed in each part of the system under test and an analysis system with a mobile-friendly interface on PC base on labview software. Finally, the kinematic and dynamic analysis of the subsoiler were studied on the basis of single-factor and multi-factor experiment, and experiment results showed that the frequency factor suggested a coupling of the influence of the soil, the subsoiler and the operating conditions.
Synthesis and Photochromism Studies of 1-(2-n-butyl-3-benzothienyl)-2-[2-methyl-5-phenyl-3-thienyl] Perfluorocyclopentene
Authors: Tang Xu Gang , Liu Hong Liang , Pu Shou Zhi
Published: December 2014

A photochromic diarylethene was synthesized and explored, The compound shown good photochromic behavior. When irradiated with UV light. the compound changed from colorless to violet, which showed a relatively strong fluorescence switch along with the photochromism from open-ring isomer to closed-ring isomer.
EtherCAT Technology with Design of EtherCAT Slave Station
Authors: Gong Feng Ming
Published: December 2014

Nowadays, EtherCAT technology is widely used in motion control and industrial automation fields. It has good performance on transmission speed and synchronization between several slave stations. In this paper, an EtherCAT slave station design method based on STM32 MCU and ET1100 chip is carried out from the view of hardware and software. This slave station’s performance of data transmission is fast and stable.
A New Bayesian Algorithm for Wireless Sensor Network Link Selection
Authors: Luo Lai Jun , Ren Hai Ping
Published: December 2014

In wireless sensor network, there are several links from one node to another, selecting the high quality link from the links is an important basic research. As a general algorithm, the typical link selection algorithm is usually used in selecting the high quality link, but the typical link selection algorithm needs lots of data packages as the testing samples. But the energy of a wireless sensor network is limited; therefore, the typical link selection algorithm is not suitable for wireless sensor network. The paper puts forward two new Bayesian link selection algorithms. Simulation results showed that the news algorithms have better performance than typical link selection algorithm in the case of small samples.
Multi-Level Fuzzy Evaluation Model of Gymnastics Teaching Ability in Colleges and Universities
Authors: Geng Hai Yan , Wu Chang Hong , Xiao Ling Xia
Published: December 2014

Gymnastics to gain success in colleges and universities must have one of the most basic ability which is teaching ability. To the teaching ability, the evaluation is objective and correct, so that the students can get all-round development during undergraduate course, and to be able to meet the needs of the society is the difficult problem in teaching. This study adopts multi-level fuzzy evaluation method, establishes teaching ability index system and evaluation method, and hopes to provide certain theoretical basis for track and field teaching in the future.
The Error Analysis of the Chirp Radar Waveforms Based on DDS Technology
Authors: Zhao Shuang , Yue Yu Bo
Published: December 2014

Based on the chirp signal radar using DDS technology, the waveform of the wideband chirp signal source is analyzed. By analyzing the system error model, the method that selecting the chirp steps in accordance with the digits of DDS phase truncation is proposed. It reduces the system errors caused by the phase truncation.
A Method for Selecting Emergency Response Model of Disruptive Incident Based on Cloud Model
Authors: Li Zhen Fu , Li Xiao , Li Xiao Peng , Xiao Fei
Published: December 2014

According to the burst characteristics and uncertainty state of development of disruptive incident,a method for selecting emergency response model of disruptive incident based on cloud model has been proposed. The specific algorithm was analyzed, and implementation steps were given. By using the weighted deviation to measure deviation between actual system and ideal system, and combined with examples, it demonstrates the practicability and effectiveness of the model.
Applied-Information Technology in Intelligent College Dormitory Assignment Strategy
Authors: Wang Jing , Xue Lin Yan , Zhang Qian
Published: December 2014

Under the impact of applied-information technology, the colleges have gradually realized the information management. In recent years, with the continuous expansion of the scale of universities, the security incidents caused by students and external social factors have emerged one after another. Many accidents happen in the dormitory. How to rationally assign dormitories and to reduce the unsafe incidences in schools is an important issue in the management of college students. This paper attempts to combine the personal characteristics of college students and the intelligent algorithms to allocate dormitories for college students from a more scientific and smarter perspective. Our algorithm have achieve excellent results and provided a new theoretical basis for the applied-information technology in management of students.
Information Processing for Analysis of Consumption Flexibility of Global Natural Gas Demand
Authors: Zhang Xin Min , Cen Kuang , Xing Wan Li
Published: December 2014

Gas consumption exist great regional difference, price and income are the main factors affecting consumption .Global gas consumption has slow growth, but the price in 2008 there was a twist. We analyze the global natural gas consumption and price points using the data from the BP. The level of economic development and natural gas reserves determine the differences in the levels of consumption. In order to eliminate the impact per unit, the regression model uses the data in the log. This paper studied the influence factors of natural gas consumption in North America using of consumer income elasticity and price elasticity. The results show that the gas consumption have a low income elasticity and price elasticity is higher .Law of "S" shape can explain the income elasticity is low, the reason is that the stage of economic development. Price elasticity is higher lies in the different between Canada and the United States, the United States is a net importer of natural gas, and Canada is a net exporter. Keywords: Consumption Flexibility; Natural Gas Demand; income; price
Synthesis and Application of 1-[2-methyl-3-benzofuran]-2-[2-methyl-5-(4-pentylphenyl)-3-thienyl]perfluorocyclopentene
Authors: Xue Ya Ming , Wang Ren Jie , Pu Shou Zhi
Published: December 2014

An unsymmetrical photochromic diarylethene1o, which is named 1-[2-methyl-3-benzofuran]-2-[2-methyl-5-(4-pentylphenyl)-3-thienyl] perfluorocyclopentene, has been synthesized, and its properties including photochromism and fluorescence have been investigated. The compound exhibited remarkable photochromism, changing from colorless to light pink after irradiation with 297 nm UV light. The photochromic reaction kinetics was studied in solution and their cyclization/cycloreversion processes belong to zeroth/first order reaction in acetonitrile.
Study on Modern Machinery Manufacturing Technology and High Precision Machining Technology
Authors: Liu Min , Luo Jian
Published: December 2014

In recent years, with the rapid development of economy in Chinese society, the mechanical manufacturing technology is increasingly maturing and requirements for the product quality and product precision is becoming higher and higher, so the development of mechanical manufacturing technology and high precision machining technology has been widely concerned by the relevant departments. According to the actual development of the modern machinery manufacturing technology and the high precision machining technology, on the basis of the principle of mechanical manufacturing, the characteristics of mechanical manufacturing technology and high precision machining should be analyzed thoroughly, meanwhile, the performance of the mechanical manufacturing process and high precision machining technology should be improved, thus, it can provide more theoretical basis and technical guidance for the development of mechanical manufacturing industry.
Synthesis, Characterization and Properties of Rare Earth Complexes with Caprolactam
Authors: Yang Hui Fang , Ren Shu Xia , Sun Lei , Li Huang
Published: December 2014

Three rare earth complexes of (Eu (C6H11NO)8, La0.6Eu0.4(C6H11NO)6, Tb0.5Eu0.5(C6H11NO)6(H2O)) were synthesized by solid-state method. The as-prepared complexes were characterized by elemental analysis, thermogravimetry-differential thermogravimetry-differential scanning calorimetry (TG-DTG-DSC), infrared (IR) spectra and fluorescence spectra. The results showed that complexed were prepared by the rare earth ions directly bonded to oxygen atoms of caprolactam ligand and emitted a characteristic fluorescence of the Eu3 +or Tb3+ions.
Effects of Sn Ion on Photocatalytic Performances of Titanium Dioxide Thin Film
Authors: Gao Zhan Jun , Yang Qing , Li Qing , Cui Jin , Zhang Zi Sheng
Published: December 2014

In order to improve the photocatalytic efficiency of TiO2, through adding different concentration of Sn ion, the photocatalytic performances of TiO2 thin films are changed. X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) spectrum of TiO2 thin films before and after doping Sn ion are compared, and the transmission spectrum and optical absorption spectrum of TiO2 thin film are analyzed. The results show that: after the implantation of Sn ion, there is a new compound Ti1-xSnxO2 on the TiO2 film’s surface, which has a higher photocatalytic activity than pure TiO2. In addition, Sn/TiO2 film has broaden the scope of its light response after ion implantation, so that it can be more effectively in using light source to send out the photons of longer waveband, and makes the photocatalytic activity of Sn/TiO2 thin films increase.
Limy Finishing Compositions with the Use of Additive Based on Sol of Silicon Acid
Authors: Loganina Valentina Ivanovna , Makarova Ludmila V. , Tarasov Roman V. , Davydova O.A.
Published: December 2014

The information about influence of additives based on the sol of silicon acid to the structure formation of limy compositions is provided. It is shown, that with the introduction of additive Sol of silicon acid in the limy mixture the acceleration of set of plastic and mechanical durability is observed. It is established, that in the presence of additive sol of silicon acid, a decrease of amorphous phase and increase of the crystal phase are observed.
Fatigue Life Prediction of Composite Laminates Based on Progressive Damage Analysis
Authors: Kang Jun , Guan Zhi Dong , Li Zeng Shan , Liu Zhun
Published: December 2014

A three dimensional analysis model is developed on the fatigue life prediction of composite laminates based on a progressive damage analysis. This model consists of stress analysis, fatigue failure analysis and material property degradation. Teserpe’s failure criteria is used to fatigue damage analysis. Fiber tensile/compressive breakage, matrix tensile/compressive cracking, matrix/fiber shear failure and tension/compression delamination are considered in fatigue damage analysis. The methodologies of sudden degradation and gradual degradation are both applied in the material property degradation. The stiffness and strength gradual degradation is based on the Shokrieh fatigue model, which is based on fatigue test for unidirectional laminates. In order to consider the scatter of the material in the practical structures, the stiffness and strength of the material are randomly distributed using normal distribution in the numerical model. The progressive fatigue damage model is developed in finite element code ABAQUS through user subroutine UMAT, which can simulate the fatigue damage process. Fatigue life of different ply stacking sequences and geometries composite laminates under different cycle loading are predicted. The predicted fatigue life is in good agreement with the experimental results.
Class B Greenhouse Model with Double Layer for Nordic European Countries
Authors: Rovira Soler Juan , Martin Concepcion Pedro , Almerich-Chuliá Ana , Molines Cano Jose
Published: December 2014

This paper presents functional and structural possibilities of Class B greenhouses, which has a film covered, for areas with extreme winter temperatures and heavy snow loads, which are typical of a Class A model (glass or rigid film covered). This greenhouse study covers from its analysis in the design phase to its correct operation after construction, breaking patterns set by European standard, due to the structural design of the greenhouse, providing new possibilities for this type B, restricted to a specific geographical area so far.
Analysis and Research of the Stablity about the Gob of Coal Mine under the Proposed Buildings
Authors: Zhang Zhi Pei , Li Fei Long , Cheng Yi , Wen Wang
Published: December 2014

Steeply inclined seam is a seam whose angle of dip ranges from 45° to 90°. Uneven subsidences of Goaf will damage the structure of the buildings on the ground surface, if improper choice and handling of foundation and buildings, part of the building will crack, tilt, until collapse. In this paper, we have a research on the area of goaf of steeply inclined seam, using numerical simulation to theoretically research and predict on the regulations of settlement, horizontal displacement, stress change of ground in goaf from now on to 20 years later. And this provides us theoretical basises and necessary suggestions for the use of ground in goaf and the safety of buildings.
FSI Numerical Simulation for Wind-Induced Dynamic Response of Tension Membrane Structures
Authors: Lou Xin , Liu Zhen Hua , Song Shuang Yang
Published: December 2014

In this paper, systemic FSI numerical simulations for wind-induced dynamic response of saddle-shaped tension membrane structures are performed using ADINA software, and the effects of some parameters such as inlet velocity, wind direction, span, rise-span ratio, tension stiffness and pre-stress of tension membrane are considered. The flow is modeled with the incompressible viscous Navier-Stokes equations and the standard κ-ω turbulence model, and the membrane is assumed as isotropic-linear-elastic material with large displacement and small strain. The rules of FSI numerical simulation for wind-induced dynamic responses of saddle-shaped tension membrane structures are summarized and the wind-induced dynamic coefficients and the wind pressure distribution coefficients are obtained which can be used in the design of membrane structures.
Reliability Assessment and Reliability-Based Design Optimization of Large Scale Box-Girder Structural System
Authors: Yu Chang Li , Lee Joo Sung
Published: December 2014

Reliability analysis and reliability-based design optimization of large scale box-girder structural system is an interesting topic in the field of structural design. Structural resistance, loading, plating thickness and cross-sectional area of beam are considered as stochastic variables. Safety margin equations of both beam and plate element are constructed. Since the safety margin equations are implicit function of random variables, the stochastic finite element method (SFEM) is adequate for sensitivity analysis. The advanced first order second moment (AFOSM) method is used to calculate the safety indices of structural components. In addition to this, branch and bound method is used to identify the dominant failure paths. Probabilistic Network Evaluation Technique (PNET) method is used to assess failure probability of structural system. The optimization problem of structure is formulated as a nonlinear programming problem that aims at minimizing structural weight with constraints on reliability and range constraints of design variables. An optimum vector algorithm is applied to solve the optimization problem. One illustrative example is carried out to elucidate present process of reliability assessment and reliability-based design optimization.
Application and Study on Tailing Dam Saturation-Line Detection of Based on Ground Penetrating Radar Technology
Authors: Liu Wei , Xiao Ren Cheng , Wang Zhong You
Published: December 2014

Just because that saturation-line is a primary factor to affect both security and stability of tailing dam, it is of great significance to define its location and distribution. Different sand body moisture contents of the saturation-line up-down layer lead to distinctive dielectric properties, which is essential to geophysical prospecting. On the basis of feasibility study of using radar to detect the saturation-line, the approach is applied practically in one dam. It is predicted that Ground Penetrating Radar (GPR) not only has a series of advantages such as intuitional image, shorter work period, greater detective depth, less interference to dams; but also can acquire calculable depth and location data, which can forecast holistic distribution of the saturation-line from a macroscopic view, and of which diagrams and results can offer reliable basis on safety, early warning analysis and security management.
Research on Concrete-Filled Rectangular Steel Tube Stiffeners and Axial Compression Bearing Capacity
Authors: Cheng Gao , Liu Yong Jian , Jiang Lei
Published: December 2014

Concrete-filled rectangular steel tube four sides restraint effect on the core concrete was weaker than the corner, which made the effect not significant. The paper studied a new kind of stiffening rib –PBL stiffener to strengthen restraint effect of concrete-filled rectangular steel tube , and evaluated its advantages compared with other stiffening ribs. 9 PBL stiffened concrete-filled rectangular steel tube columns under axial compressive load were tested. It also collected the test with other stiffened rids, such as straight ribs, binding bars, knee brace, steel reinforcement cage, steel bar stiffeners, saw tooth shaped stiffeners, stitching straight stiffeners and no rib concrete filled rectangular steel tube to compare. It evaluated increasing coefficient of bearing capacity by stiffening ribs. The results showed that: the PBL stiffeners and binding bar of concrete-filled rectangular steel tube bearing capacity was greater than other reinforcement measures by more than 20%; PBL stiffener could be a new prominent type of stiffener because of its excellent mechanical performance and simple construction.
Rigid Joints Transferring Forces outside Box Columns with Deviation of Column's Location Axis-Finite Element Method Simulation
Authors: Xu Zhong Gen , Liang Guang Xian , Chen Wei Ming , Deng Chang Gen
Published: December 2014

location axis, joints, force-transforming plates, carrying capacityAbstract: Steel structure has been widely used all over the world. In actual construction process, steel structure inevitably has initial defects, which may have bad influences on its performance. Three groups of specimens were designed in this paper to compare the performance of rigid joints transferring forces outside box columns to that of perfect traditional joints and that of traditional joints with uniaxial and biaxial deviation of column's location axis by finite element method program ANSYS. From the analysis of stiffness, yielding capacity, and ultimate carrying capacity, the impact of force-transforming plates can be evaluated. The adding force-transforming plates were helpful to reduce the influence from column imperfect.
Seismic Performances of Buckling-Restrained Braced Steel Frames in China, Japan and US
Authors: Huang Mei Ling , Fu Zhao Yu , Bao En He
Published: December 2014

Buckling-Restrained Brace (BRB) in China, Taiwan, and Japan, as a kind of hysteretic damper has been installed into steel frame structure; In the United States, however, it has been installed into the hinge-connected steel framework, as the main seismic element in order to add lateral stiffness and strength.This paper according to the design codes of frame structure in China, Japan and the United States,establishes the research model based 0n the typical steel frame form of China, Japan, and the US.The main research parameters of the model are horizontal force sharing ratio of BRB (β) and frame strength of BRB (CB)。Through the steel consumption,the relationship of story drift and story shear, the formation of plastic hinge of the design model,it compares the steel frame seismic design method of China, Japan and the United States.The steel consumption of frame is related to the strength of the frame, but has nothing to do with the frame structure form;The plastic hinge of each model focused mainly on the BRB,reflecting the overall mechanism; As to seismic design requirements, the Japanese codes are stricter, codes of China and the United States is relatively close.
Application of Flat-Panel Grid Structure with Improved Double-Tube Buckling Restrained Members
Authors: Yin Zhan Zhong , Chen Wei , Hu Zong Rui , Chen Sheng Lin
Published: December 2014

Steel roof grid was detected and static analyzed. The grid was retrofitted because bearing capacity and rigidity of some steel pipes can’t meet requirement provided in codes. Method to reinforce the steel grid is adding pipes section area and replacing pipes with improved double-tube buckling restrained members. Analyze seismic behaviors of retrofitted grid using ANSYS software.