bluuebunny/crossref_metadata_2025 huggingface dataset:
Preparation and Investigation of Cu Doped(Pr0.5Nd0.5)0.7Ca0.3CrO3–δ Ceramic Interconnect Materials
Authors: Gu Qing Wen , Chen Yong Hong , Tian Dong , Lu Xiao Yong , Ding Yan Zhi , Lin Bin
Published: October 2013

(Pr0.5Nd0.5)0.7Ca0.3Cr1-xCuxO3–δ(PNCCCx x=0, 0.5, 0.1, 0.15，0.2 ) interconnect material and electrolyte powders of Sm0.2Ce0.8O1.9 (SDC) were synthesized by citric acid nitrates self-propagating combustion methodThe phase and microstructure of the sintering samples were investigated by X-ray diffraction and scanning electron microscope, respectively. The electrical conductivity of the samples were measured by four-probe technique. The results indicated that there is no new-phase were detected after co-firing between Cu-doping PNCC and SDC at 1350°C for 5 h. In air or H2 atmosphere, the conductivity of the sintering ceramics increasing with temperature, as well as the Cu-doped contents. At 800°C, the conductivity for PNCCC0.05 reached 37.54S/cm in air, and the maximum of PNCCC/SDC reached 44.52 S/cm in air 30.68 S/cm in H2, respectively. The average thermal expansion coefficient of the series ceramics is between10.4×10-6 K-1 to 10.8×10-6K-1 at the RT-1000°C, which is close to that of the SDC electrolyte. Our results indicate that the PNCCC compounds is a very promising interconnect material for intermediate solid oxide fuel cells.
Synthesis and Application of Polyoxymethylene Dimethyl Ethers
Authors: Li Xiao Yun , Yu Hai Bin , Sun Yan Min , Wang Hong Bo , Guo Tao , Sui Yun Le , Miao Jing , Zeng Xian Jun , Li Shi Peng
Published: October 2013

Polyoxymethylene dimethyl ethers (DMMn) were synthesized in moderate yields by the reaction of methylal and paraformaldehyde catalyzed by solid acid. The pure components of DMM2, DMM3, DMM4, and DMM5 obtained by rectification were characterized by 1H NMR and mass spectra. The suitable components for blending into fuel were obtained by distillation separation. Furthermore, the combustion and emission characteristics of a diesel engine fueled with diesel and a blended fuel of DMM3-5 and diesel were investigated respectively.
Improvement of the Performance of Dye-Sensitized Solar Cells with TiO2 Photoanodes in Unsaturated
Authors: Tang Xiao
Published: October 2013

The photoelectrochemical properties of the TiO2 photoanode in unsaturated dye-adsorption state for dye-sensitized solar cells (DSCs) were investigated by the electrochemical impedance spectroscopy (EIS) and the light absorption spectrum. Significant low charge recombination as well as light absorption saturation was observed with the TiO2 photoanode in unsaturated dye-adsorption state. Due to these effects, from saturated to unsaturated dye-adsorption state, the fill factor (ff) increased from 0.60 to 0.78 and the open circuit photovoltage (Voc) increased from 770mV to 780mV. The short circuit photocurrency density (Isc) reached the maximum 10.51mA cm-2 before the TiO2 photoanode attained the saturated dye-adsorption state. The energy conversion efficiency (η) of DSC was enhanced from 4.86% to 5.34% by adjusting the TiO2 photoanode from saturated to unsaturated dye-adsorption state.
Phosphate Ester Fire-Resistant Oil Deacidification Deterioration of Dehydration
Authors: Chen Xue Mei , Wang Xin , Sun Mo Jie
Published: October 2013

Polyacrylamide Composite Diatomite as Raw Material Degradation-Resistant Oil Dehydration Experiments Conducted Deacidification，examine the Amount of Added Polyacrylamide, that:Polyacrylamide Dosage is 1g, Drying Temperature is Drying Temperature, Naoh Dosage on the Degradation of Impact-Resistant Oil. the Results Showed 25°C, Naoh Dosage of 1g of Circumstances,Degradation-Resistant Oil Resistant Oil Acid Acid Degradation from 0.34mgKOH/g Dropped 0.2mgKOH/g; Moisture from 8334.2mg/L Dropped 4180.3mg/L. Compared with Ordinary Diatomaceous Earth, Diatomite Composite Polyacrylamide Degradation Resistant Oil Deacidification Dehydration Better and with Less Cheap, Suitable for Power Plants.
Research Progress about the Methods of the Hydrogen Production through Anaerobic Fermentation by Organic Wastewaters
Authors: Meng Ri Ci , Zhang Yuan , Mo Xian Ning , Zhu Zong Qiang , Tan Liang Liang
Published: October 2013

The development and technology of the hydrogen production from organic wastewaters through anaerobic fermentation were summarized. A expound and conclusion about the anaerobic fermentation types and the influencing factors of hydrogen production were included. Some present factors which obstruct the development of the hydrogen production through anaerobic fermentation were raised which made a prospect of the bio-hydrogen anaerobic fermentation technology.
The Research of the Dynamic Model of Oil Film in Pores
Authors: Wu Run Tong , Song Kao Ping , Yang Er Long
Published: October 2013

As a mature tertiary oil recovery technology, polymer flooding has been widely used in domestic oilfields, especially in Daqing oilfield, its polymer flooding production has reached more than 25% of total output. Therefore, there are important theoretical significance and application value to do further research of polymer flooding mechanism and use to guide the production. In order to understand the mechanism of polymer flooding, polymer flooding oil film based on the decrease of residual oil range is the biggest, established the dynamics model of polymer solution displacement of rock wall oil film under the condition of tensile and shear flow. In addition, this paper discussed the effect of the oil film thickness, tensile index, dimensionless tensile coefficient as well as the power-law coefficient on oil film start, and pointed out macroeconomic conditions which is the oil film start required.
Characteristics Research of Gas-Liquid Two Phase Flow Based on the VOF Model in T Tube
Authors: Hua Ze Jia , Huang Na , Gao Ju
Published: October 2013

Using numerical simulation method, under the adiabatic condition, this paper simulates the of the upstream gas liquid two phase flow in main tube of hydraulic diameter 1 mm T tube. Superficial gas velocity within 0.01~30m/s and fluid velocity within 0.01~5m/s, under simulated by two kinds of gas volume fraction, air-water flow diagram and the flow pattern transition boundary have been got from the simulation. By comparing the simulation results, it shows that under the same environment, small channel volume fraction of gas has important influence on convection type transition boundaries.
The Efficent Adsorption of Cu2+by Modified Polyaniline
Authors: Dang Qing Yi , Cui Yu
Published: October 2013

The present article describes one new adsorbent, polyaniline modified by 3-oxa-diglycolamide. Polyaniline was synthetized by reversed-phase microemulsion method and 3-oxa-diglycolamide was synthetized by our laboratory. The factors effecting on adsorption were studied. It shows good adsorption performance on Cu2+ion.
Design and Analysis of DC/DC Converter in 42V/14V Automotive Power System
Authors: Wang Jian Gang , Zhang Jian
Published: October 2013

A growing consumption of electrical energy is necessary for automotives. The present voltage level of automotive power system has increased to 42V. 42V/14V dual voltage system is a prefer choice based on consideration of economy and technology now. In the dual voltage system, a DC/DC converter is needed between the two DC buses. The synchronous rectifier Buck converter is chosen for building the 14V/30A output prototype. The design and loss analysis of converter are given. The experimental results are also included.
Research on Power Battery Ratio in Battery Exchanging Mode for Electric Vehicles Based on Monte Carlo Simulation
Authors: Zhang Bao Qun , Yang Bing , Wang Li Fang , Shi Rui , Jiao Ran
Published: October 2013

This work presents a simulation model for electric vehicles (EVs) power battery ratio configuration in battery exchanging mode and the calculation results of the minimal battery ratios under different battery state of charge (SOC) lower limits. Applying the normal copula function, the composite probability distribution function of daily mileage, daily charging time length and travelling time length in the battery charging mode is obtained. Based on this, the daily mileage probability distribution in battery exchanging mode is derived. A Monte Carlo Simulation (MCS) model with SOC constraints is established to calculate the minimal battery ratio. The EVs battery packs exchange when SOC reaches the lower limit. The travelling data of one certain demonstration running EVs are adopted as an example to test the calculation mode, and the rationality of the mode is verified.
Optimization of Spot Power Price in Coordinated Fast Charging Model of Electric Vehicles
Authors: Tang Xiao Bo , Zhao Cai Hong , Wu Xue Hong , Zhang Juan
Published: October 2013

A real-time mechanism as a level of electricity price is proposed to dispatch electric vehicle fast charging load. Considering the peak load shifting effect of grid, the benefit of charging station and the desire of customer, the mathematics model is built. And a genetic algorithm is used to solve this problem. Finally, a simulation based on an areas predicted data of year 2020 is made to show that the proposed method can lower the peak-valley difference, promise charging station benefit as well as meet customers desire, and achieve a win-win result.
Specific Fluorescent Fingerprint of Organic Matter in Advanced Water Treatment and its Molecular Weight
Authors: Cao Jing Wen , Liao Shao Wei , Chung Chung Yi , Gau Hwa Sheng , Chiu Chun Yen , Lai Wen Liang
Published: October 2013

In this research, the UV absorbance values of wavelength at 210 and 254 nm, excitation emission fluorescent matrix were measured for source water and treated water in CCL (Cheng Ching Lake) water treatment plant during five months. The whole data produced from EEFM was analyzed by PARAFAC operated in MATLAB software. The variation of molecular weight for organic matter was measured by HPLC (high performance liquid chromatography) with UV and fluorescent detectors. Observed from the variation of UV210/UV254, high value in treated water compared with source water was found. More molecular weight less than 5 k Da was formed in the treated water with relative to source water. Also, both major components in source water were located at wavelengths of excitation/emission of 250/410 nm and 230/330 nm and those in treated water were 240/410 nm and 220/290 nm. Also, the fluorescent intensity, long excitation wavelength was higher than short excitation wavelength in source water. This phenomena was opposite with treated water.
The Development Situation of Electric Vehicle Charging Service Network Construction and Operation
Authors: Fang Chen , Zhang Hao , Zhang Ru Tong , Shi Shan Shan , Chu Yi , Zhao Ming Yu
Published: October 2013

With the deterioration of the environment and energy crisis is becoming more and more serious, many countries have put forward the development of low-carbon automobile industry. China will also increase in the development of electric vehicle and related facilities as a national strategy. Construction and operation of the electric vehicle charging service network is the basic guarantee for the development of electric vehicle industry. Governments continue to strengthen support for the policy of charging facilities, and charging service network construction and operation scale and commercial degree increased gradually.
Research on the Capability in Absorbing Electric Vehicles in Beijing Grid
Authors: Huang Bi Bin
Published: October 2013

This paper analyzes the load characteristics of electric vehicle under different charging modes including disordered charging, peak shifting charging and continuous charging. Taking a typical distribution network in Beijing as the research object, the calculation of steady state operation is carried out under the three kinds of charging modes after the integration of electric vehicles at different scales. The voltage deviation and load rate are analyzed to reveal the impact of charging modes on the capability in absorbing electric vehicles in Beijing grid.
Study of Cold-State Aerodynamic Field Test on the Outlet of 2150t/h Supercritical Once-Through Boiler
Authors: Lu Xiao , Wang Chao Yang , Wei Gang , Yang Shou Wei
Published: October 2013

The new unit putting into production is the supercritical boiler with a level of or above 600 MW, and most of them take the corner tangential combustion technology. The Long-term operation practice shows that there is gas temperature deviation on all the horizontal flues of boilers, which usually leads to the overheating tube burst of the high-temperature superheater and reheater, thus threats the safe and economic operation of power station. Towards the gas temperature deviation phenomenon that exists commonly in tangentially fired boiler, this paper went on the pertinent cold-state aerodynamic field test on the tangentially fired boilers in one new power plant and studied the airflow velocity at the furnace outlet in eight vertical levels by changing the SOFA horizontally rotating angle. The experiment showed that changing the baffles opening and horizontally rotating angle of SOFA air door could adjust airflow quite well and make it uniform, furthermore, the airflow can reach a basic balance at the biggest anti-tangential angle. This paper has some reference value towards improving the gas temperature deviation problem of tangentially fired boilers.
Study on the Influence of the Operation Parameters to the Ground Source Heat Pump Energy Efficiency Ratio
Authors: Zhou Wei , Mao Xiao Feng , Meng Chong
Published: October 2013

This paper is based on 30 ground source heat pump projects measured data which is comparative analyzed, using SPSS statistical software for modeling and find out several key independent variables that influence the system COP and the linear relationship between them. Verify this model in order to lay a foundation for unified evaluation criterion for the ground source heat pump energy efficiency ratio.
Performance Analysis of Near-Critical and Subcritical Organic Rankine Cycle
Authors: Wang Yu Ping , Weng Yi Wu , Yang Ping , Tang Lei
Published: October 2013

In this paper, three typical working fluids were selected for the near-critical ORC and subcritical ORC. The difference of performance between the near-critical ORC and subcritical ORC was analyzed by establishing the thermodynamic model. The reason for difference was analyzed in terms of the thermophysical properties. The results indicate that the performance of the near-critical ORC is better than the subcritical ORC. The net absorbed heat, net power and efficiency of the near-critical ORC vary slowly with the vapor generation temperature, which means that the near-critical ORC has good off-design performance. The dry working fluid R236fa is best adapted for the near-critical ORC among the three working fluids. The singular performance of the near-critical ORC depends on the properties of latent heat and type of working fluid in near-critical region.
Mathematical Investigation of Evaporation Process of Bicomponent Moving Droplet
Authors: Liu Lu , Mi Meng Long
Published: October 2013

In order to obtain the concentration, temperature and size variations of a bicomponent moving droplet during evaporation process, a mathematic based on multicomponent droplet evaporation model and droplet motion equation was developed to simulate the evaporation characteristic of a binary decane-ethanol droplet at high temperature nitrogen environment. By numerical calculations, the time evolution of internal concentration distribution within droplet was obtained, and the variations of droplet temperature and dimensionless size were analyzed. The numerical results show that: the droplet temperature variation includes transient heating and equilibrium evaporation at atmospheric pressure; while at high pressure environment, the droplet temperature increases gradually till reaches to ambient temperature. The variations of dimensionless droplet size are deviated from the d2 law due to the concentration variation during evaporation.
Thermal Response Characteristics of Flat Plate Heated by High Temperature and High Speed Flow
Authors: Sun Chuang , Zhao Yang , Li De Fu , Ai Qing , Xia Xin Lin
Published: October 2013

According to the view of heat transfer, the process of the fluid flow with high temperature and high speed over a flat plate may be considered as the heat transfer process within a compressible thermal boundary layer. Based on the numerical results of thermal isolation assumption, combining the temperature comparison with modification method, a coupled method of convection heat transfer coefficient with temperature field of the plate is established, and the characteristics of the thermal response for the flat plate is dominated. Take some ribbed plates as instances, the convection heat transfer coefficient and temperature field of the plate are simulated through the provided coupled method. The results show that, not only the position and materials of the plate influence the convection heat transfer coefficient, but also the time.
Multi-Model Modeling of O2 Content in Flue Gas of Power Plant Based on Affinity Propagation Clustering
Authors: Chen Bei , Song Kun
Published: October 2013

Characteristics of multiple conditions and nonlinear are existed in working process of thermal power unit. To solve the problem, a LS-SVM multi-model modeling of oxygen content in flue gas method based on affinity propagation clustering is presented. In this method, affinity propagation clustering is firstly used to cluster the training samples. Then, the sub-models of LS-SVM are trained by sub-samples. The predicted value of the testing sample is estimated by the sub-model which is selected by similarity measurement. The proposed method has been applied to modeling experiment based on the field data. The experiment shows that the proposed modeling method has superior regression accuracy and better ability of generalization.
A Simulation of the Dynamic Properties Impact Based on the Variable Pressure Angle of Ovoid Gear
Authors: Li Te , Rui Zhi Yuan , Hu Chi Bing
Published: October 2013

This paper discussed some properties of ovoid gear. The gear is a kind of special gear that transformed from the non-circular gear, hence just like the non-circular gear it also has some unique properties itself. In the paper we did some research start from the transmission of non-circular gear and point out the variable working pressure angle property. Then toke the ovoid gear as an example to deduce the working pressure angle expression, and discusse the force between two separate tooth during the meshing process. After all those things has been done, a 3D model of ovoid gear was established under the help of Pro/E, and then imported it to the Adams to do some meshing simulation in order to find the contact force under the impact of variable working pressure angle.
Modeling and Simulation of Impactor of Hydraulic Roofbolter Based on AMESim
Authors: Wang Xiao Yu
Published: October 2013

This paper analysed the working parameter of hydraulic roofbolter. Modeling and simulation were established based on AMESim. Analysed change of pump input traffic, piston velocity and displacement, impact frequency on basis of simulation curve. Also analsyed the influence of hydraulic impactor, providing theoretical basis for impact characteristics research.
Vacuum System Design of Ion Nitriding and PCVD Composite Treatment Furnace
Authors: Zuo Zhi Jiang , Bi Si , Fu L.R. , Weng Z.Q. , Peng S.H.
Published: October 2013

Keywords: Ion Nitriding Vacuum System PCVDAbstract. Vacuum system design is an important part of the heat treatment furnace. In this paper, the vacuum system of ion nitriding and PCVD composite treatment furnace is advanced a complete and thorough design and calculation to select a vacuum system that is composed of mechanical booster pump and a mechanical vacuum pump, which is also called roots vaccum pumps—mechanical vacuum pumps.
Research on Classification of Partial Discharge of Switchgear Cabinets Based on a Novel Association Rule Algorithm
Authors: Qi Wei Qiang , Li Yan Ran , Ye Hai Feng , Duan Da Peng , Jiang Xiu Chen
Published: October 2013

In order to assess switchgear insulation status, a novel association rule mining (ARM) algorithm is presented. It is used to recognize the severity of switchgear cabinet partial discharge. The algorithm uses fuzzy C-means clustering (FCM) to divide partial discharge feature interval, candidate sets meeting minimum support and minimum confidence are sought based on an improved Apriori algorithm. Multiple recursions and scans are performed on candidate sets to generate association rules library for classification. Fuzzy reasoning based on association rules are performed over multiple needle corona partial discharge signals sampled in 10KV switchgear cabinets. The results show that partial discharge classification rate using association rules is high and classification conclusions are accurate. It has provided theoretical basis and practical value for insulation status assessment of switchgear cabinets.
Simulation and Analysis of Engine Speed Coordinated Control during TC + AMT Transmission Shifting Process
Authors: Li Xing Zhong , Lei Yu Long , Yang Cheng
Published: October 2013

Coordinated engine control is an essential technology to improve shift quality. The influence of wet clutches’ towing torque in TC+AMT on shift synchronization process is analyzed, and a coordinated engine speed control strategy is proposed. Wet clutches’ towing torque and AMT shift synchronization process simulation models as well as the engine speed controller are developed by using MATLAB/Simulink. Finally the simulation of TC+AMT shifting process with wet clutches under engine speed coordinated control is carried out. The simulation results show that wet clutches’ towing torque can be used to reduce shift synchronization time, synchronization energy and the wear and tear of synchronizer as well as improving shift quality.
The Revision Requirements of China's Radiation Environment Monitoring Standard System
Authors: Lu Wei Wei , Yue Hui Guo , Yuan Zhi Lun , Yu Zheng Wei , Huang Dong Hui , Wu Yong Le
Published: October 2013

In order to establish and improve the radiation environment monitoring standard system, to provide technical support for the radiation environment monitoring system, this work first retrieve the radiation environment monitoring standards, and clear the domestic status of the radiation environment monitoring standards. According to environmental Protection Department of the relevant documents and other relevant information, the radiation environment monitoring standards and methods have been accessed , to find the missing items and issues proposed revision of the system requirements. Summarizing radiation environment monitoring national standards, standards of environmental protection industry, the nuclear industry standard, there are 28 standard missing items need to the health industry standards, inspection and quarantine industry standards, a total of 145 of these standards of environmental radiation monitoring, radiation monitoring of pollution sources, emergency response and early warning and monitoring from a management and technology meet the basic needs of the radiation environment monitoring. Research found that the standards in the revised 57 and in the formulation of 47, develop. After the revision of China's standards system will be further improved. The radiation environment monitoring work will be further strengthened.
The Research of Foam Extinguishing Agent International Standardization
Authors: Yang Liang , Zhuang Shuang , Wang Shuai
Published: October 2013

In this paper, differences between current major international and regional standards of foam extinguishing agent and China standard are analyzed. The reason of performance requirements and application characteristics are also stated and summarized. The research of this paper will greatly push forward the standardization development of foam extinguishing agent in China
On Knowledge Based Intelligent Systems
Authors: Song Li Xia , Zhang Yi Hui
Published: October 2013

This paper presents a proposal for an architecture that integrates knowledge discovery systems (automatic acquisition) and knowledge based systems (experts systems). This work formulates considerations over the viability of the implementation of this architecture according to the advanceof the technologies involved.
Research of Dynamic Target Tracking Algorithm
Authors: Dong Yu Bing , Li Ming Jing , Li Jie
Published: October 2013

An improved correlation matching algorithm is proposed in order to overcome some shortcomings of detecting the position of object accurately. A tracking algorithm with normalized cross correlation is introduced. In order to enhance the match speed, we have adopted pyramid search algorithm. The experimental results show that the algorithm has characteristics including automatic recognition of the object; permitting tracking and prediction when the object become shaded; the algorithm makes adaptive decision of varied object during the process of tracking.
Research and Design of Technology Readiness Levels Evaluating System for Digital Instrumentation and Control System
Authors: Yang Wen Yuan , Li Ning , Zhao Ying Ru
Published: October 2013

Technology Readiness Levels have a great superiority to evaluate new technologies, and have been adopted by U.S. Congress General Accountability Office, Department of Defense and will be considered in numerous other organizations. In this study, Technology Readiness Levels are customized to assess the Digital Instrumentation and Control system of nuclear power plants. The Technology Readiness Levels evaluation system based on Browser/Server structure is designed. The flow chart of the evaluation system, automatic data analysis system, and the tables relation of database are presented. The Browser/Server structure enables multi-experts use Browser to assess the Digital Instrumentation and Control system of nuclear power plants in different places through the Internet. The Technology Readiness Levels evaluation system can easy the organizing work and reduce fees of Technology Readiness assessment works of Digital Instrumentation and Control system.
Research on Sedimentary Environment of the Wayaobao Formation in Ordos Basin
Authors: Liu Zhi Rong , Tian Qi
Published: October 2013

Wayaobao Formation of late Triassic, in Ordos Basin is composed of clastic rocks, such as grey green thick-bedding medium-coarse-grained lithic arkose, lithic feldspathic sandstone, fine-medium-grained lithic feldspathic greywacke, quartzose feldspathic sandstone, et al. Detailed study of Wayaobao Formation in Shenmu was carried out about lithology, sedimentary structures, biological characteristics, heavy mineralogy and trace element characteristics, then a conclusion was drawn that Wayaobao Formation in Shenmu, Ordos Basin was fluvial deposit.
Design and Implementation of Learning Platform Based on AJAX
Authors: Gao Wei Wei , Li Yun Bo
Published: October 2013

Network bandwidth can effectively support learning content such as multimedia files under, and intelligent terminal equipment for mobile clients humanization and functional design. Therefore, through the rational design of mobile learning platform that can effectively complement traditional learning less flexible. This paper study the direct MYSQL command in the terminal to use SQL statements to the database building a database, insert the initial exam and so on. In the latter part of the maintenance process, while using the first method and the third method updates the database maintenance work.
Underwater Sonar Image Segmentation Based on Snake Model
Authors: Wu Jun Peng , Guo Hai Tao
Published: October 2013

The underwater sonar image segmentation has been a topic of research for decades. Underwater sonar image is based on the interaction by the echo signal of sound toward the underwater objects or targets. Because of the serious noises polution and the dim target edge, the contrast and resolution of sonar images are obtaind in a decreased quanlity. This paper proposes an improved snake model that focuses on solving underwater target detection and recognition. According to the traditional snake model, it is defined as an energy minimizing spline which is influenced by external constraint forces, and it can guide the image forces to pull toward features, such as lines or edges. Compared with the traditional snake model, this snake model greedy algorithm can converge to the contours more quickly and more stably, especially in complex underwater environments. Examination of the results shows that using snake model greedy algorithm has a more clear shape accuracy.
Design and Implementation of a Vision-Based System for Mobile Robot/Human Localization
Authors: Li Yan Wen , Gao Wen Zheng , Zhang Hu Jie , Zhou Zhi Guo , Ma Zhi Qiang
Published: October 2013

To avoid injury with the coexistence of human and mobile robot in the circumstance, a vision-based system for mobile robot/human localization is designed and implemented. The details of the system are described in this paper.
Analysis of Distribution of Coalbed Methane and Geological Controlling Factors in Huanghebei Mining Area
Authors: Meng Yan Ru , Li Zeng Xue , Liu Hai Yan , Jiang Nan , Liu Juan
Published: October 2013

Distribution characteristics of coalbed methane in Huanghebei mining area were studied and influence of geological factors such as faults, lithology of coal seam roof and floor, magmatic activities, burial depth and upper bedrock thickness of coal seam and hydrogeological conditions on occurrence of coalbed methane were deeply discussed in this paper. Coalbed methane content of mining area increased gradually from southeast to northwest. Coalbed methane in deep well points of mining area is dominated by methane and that in shallow parts contained higher content of nitrogen.
The Application of Data Mining in the Field of Energy
Authors: Zang Wen Long
Published: October 2013

Data mining technology is information from large amounts of data to dig out the unknown can be a practical and effective information, so provide richer information, or to provide decision support. Using data mining techniques handle large amounts of seismic data, analyze data to solve the reservoir characteristics of the intrinsic link scattered distribution problem is not easy to extract, and through Bayesian learning method to extract the hidden reservoir characteristics, based on completion of reservoir parameters of reservoir characterization data accurate modeling. Experimental results show that this method can effectively extract the reservoir characteristics of the data and accurately complete reservoir modeling, and achieved satisfactory results.
Heavy Metal Pollution Characteristics in the Sediment of Elephant Lake in Nanchang City, Jiangxi
Authors: Liang Yue , Li Wen Hua , Liu Xiao Zhen , Xiong Jian
Published: October 2013

In order to understand the pollution features of heavy metals in sediments of Elephant Lake in Nanchang city, sediment samples were collected and detected .Using microwave digestion and BCR Method for sediment pre-treatment, the concentrations of heavy elements were measured by ICP-OES emission spectrometer. Sediment heavy metal contents were in descending order of Zn> Pb> Cu> Cr> As> Cd. According to the national soil environmental quality standards of P.R.China, there was Cd contamination in lakebed mud. And five kinds of metals existed mainly in oxidizable (F3) and residual (F4) , indicating less risk of migration of heavy metals .
Analysis on Coal Mine Safety Status in China and its Countermeasures
Authors: Wang Chao , Zhang Cheng Liang , Liu Lei
Published: October 2013

Aiming at actual situation of coal mine safety in China, the main problems in coal mine including geological conditions, scientific support and safety investment, shortage of technicians, safety training and education, and supervision laws were respectively analyzed, and the preventive countermeasures such as strengthening research of mechanism and prevention method of coal mine accidents, increasing safety investment, improving safety training and education, closing or integrating unqualified small coal mines, strengthening safety production supervision and perfecting legal system should be adopted to improve safety status of China coal industry.
Strategies for Improving Effectively the Grade of a Siliceous-Calcareous Phosphate Ore
Authors: Guo Fang , Li Jun
Published: October 2013

High purity phosphatic chemicals should be produced for the development of phosphorus chemical industry. The effects of pairwise combination of scrubbing, calcination and flotation techniques on chemical composition content of different size fractions of a siliceous-calcareous phosphate ore are investigated. The grades of the different size fractions processed by flotation first and then by calcination are higher than those processed by scrubbing first and then by calcination. The grades of the coarse fractions are all higher than 30%, and it can be up to 35.43% for the 98~200 μm fraction. Moreover, the A.I. contents of the all fractions decrease obviously. Especially, it decreases from 11.12% to 5.14% for the fine < 74 μm fraction, which is lower than that processed by scrubbing first and then by calcination about 5%. The SEM images indicate that the effects of scrubbing and calcination on surface characteristics of ore samples are different.
Ventilation Optimization for Multi-Level Mining Based on Global Ventilation Network Simulation
Authors: Wang Qi Hu , Ye Yi Cheng , Lv Tao
Published: October 2013

Multi-level mining caused confusion of air return of overall ventilation system in Jinshandian Iron Mine. Based on fluid simulation software ANSYS-CFX, a modeling method of replacing fans with negative pressure section was proposed to build accurate 3D global model of mine ventilation network. Four feasible ventilation network optimization schemes were proposed. Airflow speed of inlet and air pressure of outlet was simulated in each scheme. To the principle of minimum ventilation energy, the scheme of return air through out3 and-270m level was determined as the optimal scheme. Using orthogonal experiment, three factors and three levels of variance analysis of airflow speed in each return air shaft was carried on. The functions of negative pressure of fans to airflow speed of outlet was built to calculate the optimal negative pressure parameter of each fan, which could realize the optimal allocation of air quantity and pressure in ventilation system.
Extraction of Vanadium from Chinese Black Shale by Roasting Using Na2CO3-BaSO4 Mixture Addition
Authors: Cheng Xian Zhong , Chen Kai Xu , Cheng Huai , Zhang Li Ping
Published: October 2013

In this paper, the extraction of vanadium from Chinese black shale by roasting with mixture salt addition was studied. The effect of salt additions, temperature and time on the recovery of vanadium were investigated by mixture salt roasting and 2% H2SO4 leaching. The mixture additions of Na2CO3-BaSO4 was used in the roasting process. The optimal roasting conditions for black shale were determined to be 2.5 hours roasting at 760 °C with the mixture additive SB of 10-15%. After being leached with 2% sulphuric acid, the leaching efficiency of vanadium was obtained in 85%. The pollution of waste gas was decreased in the presence of BaSO4-Fe2O3.
Simulation and Analysis of the Neutral Resistance Grounding of 1140V Power System in Coal Mine
Authors: Cui Qi , Han Meng Liang , Li Bin
Published: October 2013

The neutral grounding mode through resistance and the grounding resistance value of 1140V coal mining distribution system are studied and simulated in this paper. According to the 1140V power supply system parameter of the underground mining area of a coal mine, the PACAD software is used to establish the simulation model of power system. The single-phase ground fault caused by the insulation deterioration of the load equipment is simulated through setting single-phase ground fault in charge line of load side. The advantage of neutral grounding mode through resistance is analyzed through the simulation result. According to the distributed capacitance over the ground of simulation data and power network, the value range of the neutral point grounding resistance can be obtained.
Determination of Hydrogeological Parameters of Aquifer Using the Air Compressor Pumping
Authors: Jiang Xue , Liang Xiu Juan , Xiao Chang Lai , Du Chuan , Wang Zhong Kai
Published: October 2013

When the buried depth of water level is very large, the air compressor is used in pumping test. In the limited conditions, the value of the water level was not measured, but the recovery value of water level could be measured. In this case, the sp value of the water level drawdown was not able to be measured accurately when the pumping test stopped. So the hydraulic conductivity of aquifer could only be determined according to the linear graphic method of the water level recovery test. However, water level recovery characteristics of each period were not the same, and the raising rate of water level were not equal. Thus, there was a deviation when the hydraulic conductivity was solved with the linear graphic method. According to the existing data, the thesis combined the water level recovery fitting of the entire curve fitting with Dupuit formula of artesian well, determining the sp value and hydrogeological parameters of aquifer. After comprehensive analysis, the parameters obtained are more reasonable, which can provide a good reference for in-situ mining of oil shale in this area.
The Effects of Wettability on Gel Performance in Layered Heterogeneous Reservoirs
Authors: Shen Guang Xi , Lee Ji Ho , Lee Kun Sang
Published: October 2013

Regarding the application of enhanced oil recovery (EOR), reservoir heterogeneity leads to early water breakthrough and significant water production, so that substantial cost may be needed to treat the produced water. Gel treatments have been widely used to prevent early water breakthrough and great amount of water production by the modification of permeability. Reservoir wettability gives significant impact on gel treatment. This study is to assess the effect of wettability on the reservoir performance during gel treatment in layered heterogeneous reservoirs. Performances were compared in terms of water-oil ratio and cumulative oil recovery for different wettability conditions. With respect to oil recovery, there is no striking improvement by gel treatment. However, the results indicate that gel process presents 77% decrement of water-oil ratio over waterflood for oil-wet system and 51% for water-wet system. Gel is distributed in reservoir more widely for oil-wet conditions than water-wet conditions, which means the effect of gels is more dominant in oil-wet conditions rather than water-wet conditions.
A Study on the Efficiency of Capital Allocation of Wuhan City Circle
Authors: Xu Ke , Guo Wei
Published: October 2013

This paper studied the efficiency of capital allocation of Wuhan urban circle in the last 10 years. The results showed that the overall level of capital allocation of the past 10 years, the Wuhan city circle above the national average, but the efficiency of capital allocation is still at a low level. The efficiency of capital allocation for each year fluctuations obtained may be because in recent years the development strategy of Wuhan city circle from a proposal to a mature stage, during which various development policy is not sound, stable conclusion.
Study on the Space Distribution of the No.1 Bus Stopping of Huaian
Authors: Jiang Qing , Chen Yuan , Guan Chun Chao
Published: October 2013

The cities’ bus platforms are the service infrastructure for passengers to get on and off, and are the windows of the bus passengers to service-oriented. It has been important influence on public transport, roads and the capacity of intersection, though it is a very small part of urban roads. It has been an important factor in a traffic jam. Therefore, it is necessary to study and improve design of bus platforms in order to counterbalance the resources of bus stations, improve the ability of evacuation, and minimize the side effect of bus stations to the normal order of urban traffic.
Research of Spatial Structure Optimization Based on the Concept of Low Carbon: A Case on Ningbo
Authors: Zhu Jia Yi , Wu Yi Zhou , Xia Bin Bin
Published: October 2013

The energy consumption of city is increasing and the problem of transportation jam is more and more serious. It requires reasonable spatial planning & optimization strategies on urban space to promote the development & construction of low-carbon cities. Basing on the concept of low carbon, the paper proposes the area strategy of low-carbon city, low-carbon village and the ecological matrix protected area, providing an important theoretical basis for furthering low-carbon city planning & construction ways.
Smart Grid Implementation Strategies and Practices in Smart City
Authors: Wang Rui Miao , Tian Wei , Cao Yang , Yan Mi Fang , Gao Jin
Published: October 2013

With the in-depth studies of smart grid and the promotion of their engineering practices, lots of smart grid technologies have been applied in urban development. Smart grid is becoming an important part of the development of smart city. This paper focuses on construction and development of smart city, and proposes the basic strategies for smart grid implementation in urban areas in the context of smart city development with regard to its basic characteristics. The smart grid implementation carried out by SGCC (State Grid Corporation of China) is introduced including a large number of integrated smart grid projects in local region.
The Application Research of Contingent Valuation Method in Urban Park
Authors: Hu Ying Chun
Published: October 2013

This paper applied Contingent Valuation Method (CVM) to estimate the recreational value of Urban Park— “219 park”. The economic value analysis of recreational activities will technically enrich the connotation of part management, which can benefit the transition of recreational activities and resource management from extensive to intensive; by compared the two results, it will also provide a important references on rules and measures for government and relevant authorities.
The Research of Biochar Adsorption on Soil
Authors: Chen Jie , Wang You Yang , Wu Jun Hui , Si Hui Ping , Lin Kai Yan
Published: October 2013

This article discusses biochar adsorption and its effects on soil and discusses the future trends in this area. The large surface area, and many oxygen-containing functional groups of biochar determined by the feedstocks and the condition in pyrolysis affect the capacity of biochar to adsorb fertilizer, water, heavy metals and organic pollution. With enriched porous structures, biachar can increase the porosity and water retention capacity of soils. With the functional groups and the composition, biochar have a high adsorption capacity for fertilizer, heavy metals, organic pollutants. This paper provides an overview on the biochar sorption in fertilizer, heavy metals and organic pollutants in soil and its implication for soil to keep soil fertilizer as a controlled-released carrier and to improve soil environments as landscaping organic mulch, as well as for remediation of contaminated soils. Further research directions are identified to ensure a safe and sustainable use of biochar as a soil amendment.
Analysis of the Sustained and Firm Support of Resource-Based Industries on China's Economy
Authors: Wang Zhong Min , Zhao Lian Rong
Published: October 2013

In recent years, due to the increasingly cumulative effect of environmental problems caused by the development of resource-based industries, people ascribe the economic development lag brought about by the deformity of economic structure in resource-based regions to resource-based industries. The only way to economic structure optimization and transformation is to compress resource-based industries. After nearly a decade of economic transforming practice as well as under the support and guidance of the macro policy and the active cooperation of local governments, the non-resource-based industry has made considerable progress, while resource-based industry is still on the rise in the proportion of the total economy. This paper will, from the perspective of the economic contribution rate, analyze the contribution of the resource-based industry on our economy from 2003 to 2011 so as to prove the continued steady support of resource-based industry on China's society and economy.
Renewable Energy Quota System in Italy and its Enlightenment for China
Authors: Huang Bi Bin , Hu Jing
Published: October 2013

Renewable energy quota system (also known as renewable portfolio standard) is a new policy to promote development of renewable energy in the world. The typical pattern of the foreign quota system is studied deeply in this paper at first. Based on this, take Italian quota system policy for example, the Italian electricity system overview and key elements of the Italian quota system policies are analyzed. At last, some useful enlightenment gained from renewable portfolio standard in Italy is given to our country.
Based on Combined Model of Refined Oil Sales Forecast
Authors: Liu Yuan Hai , Kun Huang , Xian Yan , Lv Yi Tang
Published: October 2013

Refined oil is the base of national industrial, as a class of strategic commodities, it occupies an important position in national economy. In this paper, the elastic coefficient method, trend extrapolation and gray theory prediction model was adopted to forecast sales volume of refined oil based on an example, and each prediction model error was analyzed. Finally based on the three models, a combination forecasting model was established, which each models weight is determined by the relative weights of the error. The combination forecasting method makes error decrease and more accurate. Forecasting methods used in this paper can enhance oil sales volume forecast and improve the overall efficiency of sales system foundation.
Study on the Strategy of Energy Industry Development in Gansu Province
Authors: Li Rong Hua , Wang Cui Lin
Published: October 2013

based on the present situation about coal, petroleum and natural gas, electricity, renewable resources of energy industry in Gansu province, analyze the energy industry competitive power: The coal industry structure became reasonable, the safe production and the brain drain are serious; The petrochemical industry gradually tended to cluster development, deep processing products lacked; Power grid construction developed as well, grid resource allocation capacity needs to promote ; wind resources and solar energy resources are rich, electric generating capacity is not high. Then put forward the energy industry development strategy: optimize the energy structure, adjust the energy industrial layout, promote energy science and technology innovation, improve the energy macro-control system, deepen the reform of the energy system ,further establish policies and standards for sustainable energy development.
Shared Determinants of Industrial Growth and Energy Efficiency in China
Authors: Jin Ji Hong , Ju Yi Yi
Published: October 2013

With rapid economic growth and accelerated urbanization, energy demands have been increasing drastically in China in recent years. Thus it becomes of great interest to explore how to efficiently coordinate the relationship between economic growth and energy conservation, namely the question of shared determinants. Using the "1992-1997-2002-2005 Input-Output Tables this paper performs factor analysis for different industrial growth; and investigates how the changes in input structure (technology) and final demand structure (consumption, investment, export) could affect to the energy efficiency. It is concluded that, export and investment promote the Chinas economic development in a large extent, but at the same time they lead to energy inefficiency as a whole, just like many fast-growing industries are usually of a high-energy-consumption nature.