bluuebunny/crossref_metadata_2025 huggingface dataset:
Decomposition Analysis of Energy Ecological Footprint Change in Bohai Rim Region
Authors: Yang Ji Song , Hu Xiao Jun , Wu Hao
Published: October 2011

Using ecological footprint and decomposition analysis models, energy ecological footprint (EEF) from 2000 to 2008 in Bohai Rim Region was calculated. The EEF change and the impact factors were also analysed. The results showed that the EEF increased continuously from 2000 to 2008. The total values of EEF increased to 4.578×108 hm2 in 2008 from 2.159×108 hm2 in 2000, and the values per capita increased to 1.946 hm2 from 0.974 hm2. These contributed 50-60 percent of regional total ecological pressure. In all contribution factors, GDP growth was highest, energy structure and population size were inferior, and energy strength was lowest. Though the energy strength was decreased continuously, this was not enough to counteract the ecological impact derived from immoderate energy structure and consumption level. This led to energy ecological footprint in Bohai Rim Region increasing continuously.
Preparation and Fertilizer-Permeation Performance of Urea-Formaldehyde Resins Modified by Montmorillonite
Authors: Ying Zong Rong , Liu Hai Shen , Yan Rui , Yang Tian Yin , Dang Zhi Min
Published: October 2011

Urea-formaldehyde (UF) resins modified by montmorillonite(MMT) were prepared for coating materials of controlled-release fertilizers. The influences of MMT on the mechanical properties and fertilizer-permeation performance of UF resin were studied. The mechanical properties of modified UF resins are enhanced by the addition of MMT. The shear strength of modified UF resin with 3% MMT increases by nearly 20% and reaches the maximum. The urea permeation rate of modified UF resin membranes decreases with the increasing of membrane thickness and increases with the increasing of MMT content.
Perennial Grain Crops: A New Option for the Future Food and Ecoagricultural Environment
Authors: Zhang Yan Min , Jiang Lu Ming , Li Yong Peng , Tian Chao , Zhang Wen Jing , Li Ji Lin , Xiao Zhi Min
Published: October 2011

Although agriculture has traditionally been primarily the concern of the world, it now plays an increasingly important role in how we meet challenges—international food security, environmental protection, climate change, energy supply, economic sustainability, and human health. With population growth and environmental deterioration, the attention about food security and sustainable agriculture is on the increase, and the status of ecological agriculture comes into prominence. Perennial grain crops would address many agricultural problems as well as substantial ecological and economic benefits, which can provide multiple ecosystem services essential for sustainable production more effectively than production systems based on annual crops, such as protecting against soil erosion, conserving water and nutrients, storing more carbon below ground, and building better pest tolerance. This paper presents some of advantages of perennial grain crops as a new option for the food security and ecoagriculture, as well as prospects the significant utilization of perennial crop on sustainability of agriculture and environment in the future.
Regional Sustainability Evaluation Based on Triangle Model: A Case Study of Chuzhou, China
Authors: Zhang Jian , Pu Li Jie , Peng Bu Zhuo
Published: October 2011

This paper analyzes and evaluates the status and long-term trend of regional economic sustainability of Chuzhou in China. This study, based on the triangle model and the definition of economic sustainable development, evaluates the interrelationship among regional economic development, resource-energy consumption, environmental pollution, and ecological performance. The sustainable and comprehensive utilization situation in the study region from 1985 to 2005 is examined. This study has a practical value for the settlement of problems in current regional economic development and in the methodological significance of regional economic sustainability and comprehensive utilization.
Study the Countermeasures of Industrial Water’s Recycling in Shijiazhuang
Authors: Nan Yue Sheng , Zhou Jia Qin , Li Chang Qiang , Meng Yi Bo , Wang Ying , Chen Xue Jiao
Published: October 2011

Shijiazhuang is an important industrial city in China,and it is also one of the cities of extremely water scarcity. With the rapid development of econnomy, the water for industrial use is growing increasingly,which leads to a sharp contradictions between demand and supply of water resources. Based on the theory of recycling economy, recycling use of industrial water in Shijiazhuang is one of the best ways to relax the contradiction between the water supply and demand, and finally promote the sustained socioeconomic development.
Research on Diesel Engine Fault Diagnosis Modeling Based on Elman Neural Network
Authors: Gao Guo Dong , Zhang Wen Xiao , Sui Jiang Hua , Mu Guang Yu
Published: October 2011

In order to solve the fault diagnosis problem of diesel engine, Elman neural network (ENN) was applied to build a fault diagnosis model of diesel engine. The training algorithm is in introduced and at the same time, the process of diesel engine fault diagnosis is also expatiated. The diagnosis results indicate the reliability. So a contingent fault of diesel engine can be identified effectively.
Reliability Evaluation of Planning Distribution Network
Authors: Huang Zi Long , Guan Lin
Published: October 2011

To make the reliability evaluation suitable for the planning distribution network,which contain the large-scale existing network and the uncertain planning part,proposes an algorithm based on the idea of section and enumeration method. This algorithm fully considers how the breakers, lines, switches, distribution transformers and other equipment failures impact the reliability index of distribution network .The effects of both the alternative path and the refusing of fuses are considered in the proposed algorithm. The calculation results of actual case show that the proposed method is effective.
Accelerate the Rural Ecological Environment in Dalian Actively Promote the Development of Circular Economy
Authors: Wang Huan Shun , Zhu Jin Cheng , Yan Liang Zheng , Lin Cheng Xian , Yan Zheng Yuan , Jiao Xue Cheng
Published: October 2011

This paper introduces the "second Five-Year" period,Comprehensive management of rural pollution in Dalian,Ecological protection and construction of major initiatives,Establish and improve the rural garden, village and township enterprises in villages and the development of circular economy model,Actively promote the sustainable development of circular economy in rural areas,Care at home and abroad for economic development of rural circulation and reference reference peers.
Numerical Simulation of Temperature Field for Bedrock Fracture Groundwater at Zhangzhou Geothermal Field
Authors: Zeng Yu Chao , Su Zheng , Wu Neng You , Wang Xiao Xing
Published: October 2011

Based on the analysis of the existed conceptual models and their main problems, a new 3-D conceptual model for bedrock fracture groundwater at Zhangzhou Geothermal Field is established and solved. The results show that temperature distribution of bedrock fracture groundwater is strongly controlled by fault-fracture system and a high temperature cylinder in the fault formed by convection of hot water heats top surface of bedrock and thus forms the center high temperature part. Heat flux reaches a maximum at center high temperature part and reduces towards the edge of the geothermal field. The Quaternary pore water movement reduces the maximum and local heat flux. These are important for guiding and optimizing the future exploration and exploitation at Zhangzhou Geothermal Field.
Research on Performance Evaluation Index System of Rural Medicine Supply Chain
Authors: Wang Hong Qi , Gao Xiang , Wu Jian Long
Published: October 2011

In order to measure and evaluate the performance of rural medical supplying chain accurately and objectively and improve the operational efficiency of rural medical supplying chain, this paper analyzed the factors affecting performance of rural medical supplying chain systematically and the characteristics of rural medical supplying chain management by following certain design principles and designed the index system of the performance of rural medical supplying chain and put forward the corresponding application strategy by using of the theoretical ideas of Balanced Scorecard.
Optimizing Engineering Project Governance for Sustainability
Authors: Tuffley David , Wong Yuk Kuen , Houghton Luke
Published: October 2011

Organisations are increasingly leveraging improved decision making processes during the establishment of project teams. Beyond the obvious advantages of accessing qualified, cost-effective project staff, the issues of sustainability and governance are addressed when the virtual teaming approach is used. Projects can proceed without people needing to travel to a co-located work-place, thus saving time, effort and expense while creating less environmental pollution. But there is a governance problem; running virtual projects, particularly complex projects involve a greater degree of difficulty than managing co-located projects. What is needed are effective, practical methods for managing virtual projects. This paper introduces a new Reference Model of Organisational Behavior (RMOB) for the Leadership of Complex Virtual Teams which is arguably an effective way to meet the challenges of virtual teaming. This paper also discusses the new issue of sustainable leadership with mention of the proposed Organisation for Economic Cooperation and Development (OECD) Management indicators that point towards sustainable governance.
Research on Tax Assignment of Environmental Conservation in China Energy Industry Chain
Authors: Ren Ye , Hao Hui Xia , Huang Xun Cheng
Published: October 2011

In order to protect enviroment and save energy consciously. China began to levy taxes for enviromental conservation. At present, there exists two ways to levy tax, one depends on the pollution degree of each enterprise in the chain, the other mostly lies on the profit. Both ways are of one-sidedness and lack of fair because they do not make scientific analysis to the whole industry chain.For enterprises in the energy industry chain, this paper think the best way is to pay taxes cooperatively.It can ensure seamless joint of chains and obtain resonable profit assignment.Based on game theory,this article established a model of tax assignment for enviromental conservation by means of Shapley value method.Furthermore,the paper gave out an example to prove the validity of the model.Finally, the paper put forward a modified method based on venture .
Stability Analysis of Steep-High Rock Slope Based on Block Mechanical Theory — Case in Jiangping River Hydropower Station
Authors: Liu Lin , Xu Wei Ya , Shi Chong
Published: October 2011

Due to specific geological conditions, stability of complex high slopes has become one of the key technical problems in hydroelectric project. Especially for steep-high rock slope, it is hard to calculate the stability by normal rigid limit equilibrium method. Steep-high rock slope in Jiangping River hydropower station is taken for example. On the base of study of geological structure and judgment of preferred structure plane, simplified geological model is built up. The main deformation destruction mode and type are analyzed based on block theory, rock mechanics and other basic mechanics while the related critical values are calculated. So slope stability is discussed and corresponding control measures are worked out. This method can be used in following stability research of similar slope.
Theory of Environmental Kuznets Curve
Authors: Xu Lan
Published: October 2011

The paper develops a two-state-variable environmental growth model to derive the optimal growth path for the relationship between pollution and economic growth, which is used to verify the existence of the Environmental Kuznets Curve (EKC) hypothesis. It is found that the theoretical outcomes imply the existence of the EKC relationship between environmental degradation and economic growth, which is dependent on the combining effects of the pollution intensity, abatement technology of pollution emission, production technology, and the return rate of capital stock.
Study on Diversity of Soil Microbial in Different Reclamation Years
Authors: Zhao Xiao Guang , Xie Juan , Song Shi Jie , Chen Ting
Published: October 2011

This paper made a comparative study of the distribution and quantity of bacteria, actinomycetes, fungi and different bacteria physiological group in different reclamation years and different soil layers with the soil in different reclamation years as experiment material, adopting flat-panel culture and microbial selecting culture medium and using accounting of gradient plat-panel coating. The results showed that: with the extension of reclamation years, microbial quantities are rising overall. The microbial quantities (bacteria, actinomycetes and fungi) in the cultivated land of 200 years were 4.94 times higher than those in the uncultivated land; the microbial quantities in the surface soil of 200 years were 2.16 times higher than those in the deeper soil. The soil microbial community structure of agricultural land has been changing with the extension of reclamation years and the quantitative relation of the three main microbes was: bacteria > actinomyces > funfi; As the uncultivated land become developed, the microbial diversity index and the quantities of physiological group reduced after increasing in the beginning, but the regularity for change of physiological group diversity index is not obvious.
The Analysis of Energy Consumption and Economic Growth in China
Authors: He Su , Chang Ming Ming
Published: October 2011

This paper analyses the relationship between China's economic growth and energy consumption of the period 1978-2009 by the Granger causality test. The results of the study show that: economic growth and energy consumption have cointegration relationship, energy consumption promote economic growth, but economic growth is not Granger caused the consumption of energy. In order to promote China's economic development, the reasonable energy consumption quantity must be found, It's a new topic.
Socially Responsible Index: International Experiences and China’s Practices
Authors: Li Zhao Hui , Li Jun Feng
Published: October 2011

This paper focuses on the compiling and the role of the socially responsible index. Socially responsible investment originated from ethically investing teachings and developed on growing social awareness. Social responsibility indexes are products of the development of social responsibility investment. The Domini 400 Social Index, the Dow Jones Sustainability Indexes and the Calvert Social Index are typical cases of international social responsibility indexes. They are compiled on the base of consistency, flexibility and transparency and their component stocks are selected according to triple bottom line. Compared with international experiences, China’s social responsibility indexes have a shorter history and some problems.
Fragmentation Pathway of Acevaltrate by Electro-Spray Ionization Ion-Trap Mass Spectrometry
Authors: Liu Yong Gang , Liu Yong , Ma Qun
Published: October 2011

The fragmentation pathway of acevaltrate was investigated by electro-spray ionization ion-trap mass spectrometry．Under the positive ion mode, pseudo-molecular [M+Na]+ could be easily obtained，and fragmentation pathway presented a certain regularity. One of the major fragmentations observed in the collision induced dissociation(CID) spectrum was loss of branched-chain, and the other was that three-membered oxygen-containing rings would break into aldehyde. These results might be used to forecast the structures of irodoids.
Research on the Development Mode for Ethnic Minority Traditional Sports Cultural Resources
Authors: Wang Hong Shen , Yang Feng Jun , Fang Yong Lan
Published: October 2011

Starting with ethnic minority traditional sports culture and its characteristics, this paper analyzes the attributes of ethnic minority traditional sports culture as being latent, inheritable, shareable, differential, adaptable and developable from the angle of the cultural resources theory. Based on the analysis, this paper explores the modes of ethnic minority traditional sports cultural resources development including the exhibition and performance mode, the concentration and extraction mode, the ethnic sports tourism mode and the traditional sports cultural industry mode.
Research on Activity on Plant Growth of Extracts from Jatropha curcas Leaves
Authors: Chen Yi Ping , Liang Zhen Yi , Lin Zhao Hua
Published: October 2011

The extracts from leaves ofJatropha curcaswere obtained with water, methanol, ethanol, acetone and ethyl acetate by impregnation method, and the flavone content of extracts was analyzed by UV spectrometry. Then the activity of plant growth was tested respectively on mung beans and water spinach through observing the seed germination and seedling root growth. The results showed that the extracts could promote plants to grow well at lower concentration (<50μg•mL-1), but inhibit at higher concentration, and the effect was best under the 40～50 μg•mL-1. Besides, water spinach was more sensitive than mung bean to the concentration.
Evaluation System of Sustainable Development for Farmland Shelterbelt Network Based on ANP
Authors: Yang Si Ling , Liu Ying Zong
Published: October 2011

Since the evaluation index system of sustainable development for farmland shelterbelt is a compound system with network and multi-index, it is difficult to evaluate effectively by common methods. In this paper, a set of evaluation index system of sustainable development for farmland shelterbelt network based on ANP method is established, and the evaluation index system is quantified with SD software. The method can improve the evaluating system of previous studies on the sustainable development of farmland shelterbelt, and make the evaluation results have more directive significance for farmland shelterbelt management.
Study on Original Coal Seam Permeability Coefficient
Authors: Dong Zi Wen , Qi Qing Jie , Hu Nan , Xu Chang Fu , Niu Hui
Published: October 2011

In the case of gas radial flowing in layer-though boring, use the method of draining water gathering gas measured the Gas flow of borehole that there is water flow out from drilling Sometimes,the coal seam gas permeability coefficient is calculated using"Radial Flow Method"and"Optimizing Method,found out the range of 5-3 original coal seam Hongmiao coal mine permeability coefficient is0.007~0.008 m2/(MPa2·d).
An Empirical Analysis on the Level of New Industrialization in Hefei
Authors: Luo Zheng Qing , Luo Jun Yan
Published: October 2011

Hefei is in a period of rapid development of new industrialization, but there is no quantitative study on where the new industrialization level is. Therefore, this article designs a set of evaluation index system of new industrialization, and uses principal component analysis to calculate the new Industrialization level in Hefei. The result shows that Hefei has been in the medium-term of the intermediate stage of new industrialization.
Optimization of the General Aviation Aircraft Longitudinal Controller Parameters Based on Genetic Algorithm
Authors: Cao Yang , Hu Zhan Shuang , Zhao Wei Ping
Published: October 2011

The PID control is a popularly control method that used in control systems, which is still adopted in many practical application processes.This paper is based on the oringinal navigation aircraft longitudinal channels model,and discusses the setting of navigation autopilot longitudinal channels model in the PID controller parameters, using General Aviation Aircraft Longitudinal channels of PID control parameters optimization based on Genetic Algorithm.In contrast with the simulink7.1 simulation results of the longitudinal channel model, base on the thought of genetic algorithm and use MATLAB language program to get the parameters of the controller, adjusting the parameters to achieve the optimization of PID control parameters. The result of SIMULINK simulation: The PID controller which is designed by using the genetic algorithm is more adaptability, flexibility, and can guarantee the system control effect.
Research on Urban Traffic Signal Control Method at Single Intersection
Authors: Bai Li Fang , Xu Jin Xue
Published: October 2011

A fuzzy logic controller is presented for a four-phase isolated signalized intersection on normal and abnormal conditions. It controls the traffic light timings to ensure smooth flow of traffic with minimal delay, according to the real-time traffic flow information detected by the vehicle detector. A new controller is proposed, in which the fuzzy membership functions are optimized by neural network and the control rules are optimized by genetic algorithm. Results show that the traditional fuzzy controller achieves good control effect and the performance of the controller optimized is better than the traditional one on both normal and abnormal conditions.
Characteristics of Climate Warming in China and its Impacts on Environment
Authors: Sun Guo Wu , Li Zhen Kun , Shi Jun , Chen Bo Min
Published: October 2011

The characteristics of climate warming in China are investigated by using observed daily surface temperatures at 541 gauge stations from 1960 to 2010 and monthly pressure and air temperature from NCEP/NCAR reanalysis dataset. The results show that the temperature exhibits an ascending trend regardless of regions, underlying surface situations, seasons and atmosphere layers for the past 50 years, but warming rate is higher in north, west, urban district, winter and low atmosphere layer than that in south, east, suburb, summer and mid atmosphere layers, respectively. Afterwards analyzed is the interrelation of temperature variation, Siberian high and land use. Finally the connection between environmental destruction and climate warming is discussed based on the following process, viz., climate warming leads to frequent occurrence of extreme weather and climate events as droughts and floods, which can cause geological disasters and destroy the environment.
A Research on Strategic Emerging Industries
Authors: Li Peng Mei , Li Hui Ming
Published: October 2011

Under the pressure of resource and environmental constraints, China proposed to develop strategic emerging industries in order to transform economic development mode and response to the economic and environmental crises. Strategic emerging industries are a new concept. This paper firstly summarizes its content. Then we conduct a comparative analysis between China and some developed countries. We can get the following conclusions: China is not a leader country in the development of new emerging industries; China’s choice in strategic emerging industries is consistent with developed countries; Industry competitive, in essence, is the technology competition. Finally, we give some suggestions.
Causes Analysis and Treatment Measures for Excess SiO2 Content in a 300MW Unit Boiler Water
Authors: Zhou Yong Yan , Guo Xiao Cui , Li Li , Zhu Zhi Ping
Published: October 2011

According to the characteristics of silicon in water, analysis is implemented for the excess SiO2 content in a 300MW unit boiler water. Serious excess SiO2 content in the economizer inlet water and boiler water is caused by high-pressure heater leakage. In addition, SiO2 content increases with the raising feedwater temperature, because colloidal silicon solubility increases with the raising feedwater temperature. Colloidal silicon in water is induced by condenser tiny leakage. High-pressure heater plugging must be handled. Improving activated charcoal filters washing and boiler blow-off frequency can be used to reduce the impact of colloidal silicon on boiler and ensure safe operation of the boiler
Determination of Reactive Oxygen Species in Cigarette Smoke by DR6G Fluorescent Probe
Authors: Liu Li , Xu Shi Jie , Li Song Zhan
Published: October 2011

A mass of reactive oxygen species(ROS) are produced in the process of smoking. Superfluous ROS can induce the oxidative stress in organism, which will cause irreversible damage to cells. Fluorescent probe is taken as a marker of oxidative stress in biology and has been applied to ROS detection in the field of biology and chemistry for high sensitivity, high simplicity of data collection and high resolution. As one type of fluorescent probe, no-fluorescent dihydrorhodamine 6G(dR6G) will be oxidized to the fluorescent rhodamine 6G. In this process, each molecule reacts with two active oxygen molecules. The probe can be used to detect ROS in mainstream cigarette smoke by using derivative fluorescence method. The action mechanism of ROS on dR6G was investigated and the standard curve of R6G fluorescence intensity with its content was built up. The contents of ROS from the 4 types of cigarettes purchased in market were detected and the cleaning ability of filter tip to ROS in cigarette smoke was also researched. The result shows that the amount of ROS has close relationship with the types of tobacco and cigarette production technology and the cleaning ability of filter tip to ROS in cigarette smoke is very limited. Compared with other detecting methods such as electronic spin resonance(ESR), chromatography and mass spectrometry, this detection method by the fluorescent probe has higher efficiency and sensitivity and will have wide applications in the ROS detection fields.
Enterprises' Environmental Credit Assessment — from the Perspective of Financial Institutions' Green Credit
Authors: Li Jun Li
Published: October 2011

Green credit is not only a financial leverage which promotes environmental protection, it is also an inevitable choice for financial institutions to evade their environmental risks, and the environmental credit assessment is a critical link for implementation of green credit. Based on analysis of various factors affecting enterprises’environmental credit level, this paper designs the indicators of environmental credit assessment, and builds the model for enterprises' environmental credit assessment with AHP(analytic hierarchy process) in order to provide financial institutions with a technical method for environmental credit assessment so as to promote implementation of green credit smoothly and evade the environmental risks in the field of credit effectively.
Design and Simulation for Microgrid System Based on Homer Software
Authors: Zhu Lan , Yang Xiu
Published: October 2011

Aiming at some microgrid system in Shanghai, economic simulations and analyses are done. A microgrid including solar, wind power, microturbines, diesel engine, energy storage and other distributed power resources is constructed based on homer software and simulation parameters are set to make an optimum proposal. Further studies such as running on the grid, changing the cost of distributed energy and operating in the PV / wind power plant mode are discussed.
A Comparative Study of VAR Measure Using Different Frequency Data of China’s Fuel Oil Futures Market
Authors: Wang Feng
Published: October 2011

By using datas of Chinese fuel oil futures market, this pater establishes VAR model based on low frequency, high frequency and ultra-high frequency data, to measure the value at risk, and compares the prediction accuracy of different frequency. The research results show that the high frequency and ultra-high frequency data have better accuracy in the VAR measuring, as they contain more intraday information and can reflect the futures market microstructure better.
Study and Application on the Parameters of Gob-Side Entry Retaining in Thin Seam with Limestone Roof
Authors: Guo Zhong Ping , Qi Jia Li , Duan Hui Qiang
Published: October 2011

The gob-side entry retaining technology can be used to not only solve the problem of intensity in successive mining but also reduce the 10,000 tons' drivage rate and improve the coal recovery. Based on the established roof cutting mechanical model, the method of numerical simulation is used to determine the technical parameters of gob-side entry retaining in one coal mine. The reduction in cross-section of the roadway is 10.8% according to the field observation, which shows that the gob-side entry retaining has obtained preferable results and fulfilled the demand of safe production in the face.
Sustainable Development in International Law
Authors: Gan Kai Peng
Published: October 2011

Over the past decades, the concept of sustainable development has been accepted by international community due to the serious environmental problems. However, the debates surrounding the legal status of sustainable development are continuing all the time. Apparently, sustainable development should be seen as a binding principle of international customary law and its broad policy goal, found in certain international treaties has specific meanings in the text of international laws.
Synthesis and Characterization of Surface Modification of TiO2 Nanoparticles for Electrophoretic Display
Authors: Bai Yu , Meng Shu Xian , Feng Ya Qing
Published: October 2011

TiO2 and carbon black inorganic pigments having opposite charges have been typically used for white and black image in the electronic ink display technique, respectively. However, since TiO2has a relatively high density, the density mismatch between nanoparticles and the dielectric medium causes severe sedimentation problem in the suspended media. In order to change its surface from hydrophilic to hydrophobic and lower its density, TiO2was grafted by γ-Methacryloxypropyl trimethoxy silane (KH570), and then coated with poly(methyl methacrylate) (PMMA) via a dispersion polymerization method prior to being used for an electronic ink material. In order to improve their mobility, a charge control agent was also added to the suspension of synthesized nanoparticles in the dielectric medium. The KH570-grafted TiO2nanoparticles and the TiO2/KH570/PMMA nanoparticles were characterized by fourier transform-infrared spectroscopy (FT-IR), field-emission scanning electron microscopy (FE-SEM) and transmission electron microscopy (TEM). Density of TiO2/KH570/PMMA nanoparticles was found to be decreased. Thermal properties of the composite particles were analyzed by thermogravimetric analysis (TGA).
The Theory and Application Research on the Magnetic Non-Destructive Testing of a Safe State for a Defect Sensitive Structure
Authors: Wang She Liang , Miao Xiao Yu , Fan Yu Jiang
Published: October 2011

When a steel etc. a ferromagnetic material is subjected to the external loads, the internal force will develop, that is, stress will develop inside the material, which will lead to a corresponding change in the magnetic permeability of this material when magnetized. In this paper, according to this unique property of the ferromagnetic material, in the light of the mainly stressed and deformation characteristic of a long span steel structure etc. defect sensitive structures, by the use of stress sensitivity of magnetization, a mathematical physical model of relationship between the change in the magnetic permeability and stress is studied and put forward when a ferromagnetic component is under the action of a simple stress, a linear dependency relation of the component’s stress and its permeability is obtained, and the fundamental theory of the magnetic non-destructive testing of a safe state and its engineering application method is also established for a long span steel structure etc. defect sensitive structures, which provides a definite basis for guaranteeing safety of this kind of structures. Additionally, in this paper through the comparison of the theoretical analysis results with results of the related experiments, the dependency relation of change in the magnetic permeability and stress etc. theoretical research results is verified. Both these results exhibit a good consistence, which demonstrates that the research and the application of the non-destructive safe testing method for a defect sensitive structure based on the magnetic effect is feasible and valid and the future will see a certain engineering application prospect in this research and this testing method.
The Application of Infrared Technique in the Fault Diagnosis of Electric Equipments
Authors: Cui Hao Yang , Xie Jian Can , Qian Ting , Tang Zhong
Published: October 2011

The basic theory of infrared fault diagnosis is overviewed in this paper, and the types and characteristics of the instruments are analysis. Then a few infrared fault diagnosis methods of the electric equipments have been summarized. It shows that the intensity of the infrared radiation is associates with the equipments infrared emissive, and the peak wavelength of infrared radiation associates with the equipments temperature. Based on the discussing of the theory of infrared fault diagnosis, the existing issues are summarized.
The Sensitivity Analysis of Stability Factors of Rocky Slope with Ecological Restoration
Authors: Cai Xian Yang , Xu Wen Nian , Xia Zhen Yao , Zhou Zheng Jun
Published: October 2011

Based on orthogonal experiment, the thickness of protection habitat base material (PHBM), the cohesion of PHBM, the internal friction angle of PHBM, the slope height, the slope angle and the density of PHBM are selected as influencing factors of stability of rocky slope with ecological restoration (RSER) and each factor is considered three levels. Then, using strength reduction FEM by the software ANSYS, the safety factor of RSER in various combinations is analyzed. Finally, the range analysis and comprehensive assessment are applied to the assessment of results. It is showed that the cohesion of PHBM is the dominant sensitivity factor which affects the stability of RSER, flowing by the slope height, the slope angle, the thickness of PHBM, the internal friction angle of PHBM, the density of PHBM.
Template-Free Synthesis of α-Fe2O3 Hollow Spheres and Nanocubes
Authors: Chen Chang Yun , Zhou Feng , Hua Chun , Li Zhao Hui , Pang Huan
Published: October 2011

A facile hydrothermal method without any templates has been developed for the preparation of α- Fe2O3nanocubes and hollow spheres. The as-synthesized products is then characterized using X-ray diffraction(XRD), scanning electron microscopy(SEM). The nanocubes have extraordinary unity and we can anticipate its unique magnetic characteristic. On the other hand, the hollow sphere structure has a promising future in the application as carriers for targeting drug delivery. In our opinions, the method is not only very simple, but also is very friendly to the environment.
Arch Math Model of Thick Sand Layer Mining Unload Failure in Shallow Seam
Authors: Zhang Pei , Huang Qing Xiang
Published: October 2011

Under the basis of the “arch” failure of thick sand layer in preliminary period in shallow seam through field experiment, arch math model is set up. The conclusion establish the basis to study the coupling problem between key stratum (key block) and the sand layer.
Research on Deformation Controlling Technology of the Narrow Pillar of Insular Coalface Roadway Driving along next Goaf
Authors: Chen Jian Ben , Zhang Dong Sheng , Zhang Wei
Published: October 2011

Through surrounding rock controlling mechanism analysis of roadway driving along next goaf, the corresponding technical measures are put forward, and a new combined support scheme of anchor-girder-net support is designed. The results show that the roadway is located under the cantilever beam, which can be better to avoid roadway damage from rock fracture and bending and sinking in caving zone. Cooperated with twice times grouting to the coal pillar and roof, the new combined support scheme had effectively controlled the roof structure destruction again. Field application results indicate that the new support scheme effect is remarkable, the deformation of roadway had been reduced by 55% to 60%, and deformation of surrounding rock had been significantly controlled, which can provide a reference for similar mine area.
Stability Effect to Railway Tunnel of Underground Mining Using ABAQUS
Authors: Yuan Li Wei , Jin Long Zhe
Published: October 2011

The paper used the software ABAQUS to the numerical simulation research of the strata movement process during the underground mining according to the actual characteristics of certain mine. Through the research and theory analysis of numerical simulation, the numerical value of deformation in horizontal and vertical direction of the strata movement at the railway tunnel is included. It showed that the exploitation of No.2 ore body would not affect the safety of railway tunnel nearly the mine, which provide decision-making basis for the railway departments and mining enterprises, reduce the waste of resources.
Analysis of Key Safety Factors Mining Large Section Working Face to Steep Seams
Authors: Shao Xiao Ping , Shi Ping Wu , Xia Yu Cheng
Published: October 2011

As a scientific method, the mining method of horizontal section top coal caving [1-3] has been widely used at Urumqi coal mine in Xinjiang autonomous region. At present, the section height remains at 18～22m in Urumqi mining area, belonging to the large section mining [4], and has the possibility to further improve section height. In this paper, the main factors affecting safety were analyzed to the large section working face, pointing out that safety mining of the large section working face must finish a good job selecting a reasonable section height to maximize the recovery ratio of top coal, filling surface to block air leakage channel supplying oxygen after mining working face, blocking and extracting gas to reduce the gas content at working face, and equipping with modern safety testing facilities to enhance safety of the detection sensitivity at working face in four key measures, which would ensure safety mining for large section faces at steep seams.
Experimental Study on Copper Oxide Ore from Fuxin
Authors: Li Ming Yu , Ren Rui Chen , Guo Tian Yu , Li Tie
Published: October 2011

chemical compositions, mineral compositions, mosaic relationship, particle distribution characteristics are identified by mineralogy research on oxidization copper ore from Fuxin. Flotation conditions and closed-circuit process is carried out, it is adopted that adding sodium sulfide for sulfiding and ammonium sulfate for activating, then adding sodium silicate and sodium hexametaphosphate as combined inhibitation to intensify inhibitating, a combined collector consisiting of hexyl xanthate and butylamine dithiophosphate was used to strengthen the collecting effect. Finally, a copper concentrate with a grade of 17.39 % and a recovery of 59.36 % can be obtained, meanwhile, the grade of associated silver is 297.8 g/t, the recovery is 55.96 %.
Study of Feasibility and Technology of Recleaning Middlings of Coking Coal
Authors: Hu Xiu Ming , Ren Rui Chen , Li Cai Xia
Published: October 2011

The status of coking coal resources and the utilization of the middlings of coking coal are analyzed in this paper, and the necessity and practicability of middlings’ rewashing is held up. Middlings of BaBao Industrial Park Coal Preparation Plant is used as sample of experiment test, through size analysis and float-and-sink test, the feasibility of middlings’ rewash is demonstrated. Two kindes of separation processes are presented : ⑴crushing-coarse and thin slime are separated separately; ⑵crushing-grinding-froth flotation. Scheme 2 is appropriate for the separation of Babao middings.Experiments confirm that the scheme 2 would be more suitable for the middlings’ separation, and the cleaned coal’s production rate of is 31.88% , the ash content is 14.4%. So there are high social benefits and economic benefits. Reclean middlings of coking coal is a new direction for the protection of coking coal resources, in the meantime, it comply with the environmental requirements and is an important measure to realize the sustainable development.
Research on Mineral Processing Technical of a Gold Ore
Authors: Chen Jiang An , Liu Jun
Published: October 2011

Recovering gold form arsenic bearing gold mine through floatation has always been an important research subject, the gold ore contains 2.40 g/t of gold and content of arsenic was 1.2% in Hebei, cannot achieve good product indexes, in order to improve the efficiency of resource use, lime was adopted to control the pH value of pulp, NaHSO3was added to inhibit the arsenic, the floatation of gold was carried out priority. The gold concentrate contain 65.63g/t with the recovery was 89.92% and the content of arsenic was only 0.07% after closed-circuit experiment, that results means the product indexes were improved greatly compare the field product now.
Biological Anaerobic Treatment for Low-Rank Coal Preparation
Authors: Sun Li Mei , Wu Jiang
Published: October 2011

The effect of microbiological treatment of low-rank coal with an anaerobic microbial consortium on theirs characteristics and composition has been inwestigated. A large amount of pyrite sulfur is removed and coal ash is decreased with anaerobic conditions in closed flask. After biological treatment of these low-rank coals in a continuously operationg flow reactor without air blowiong and with everyday aeration, coal ash reduction is found to be more significant under conditions of reactor aeration due to activation of facultative microorganisems. In some time, some metals are removed from two kinds of low-rank coals, includiing iron, manganese, potassium, lithium, toxic and trace metals. The exchange of elements between coal and mineral culture medium depends on coal rank. Metal leaching is higher for higher rank coal.
Recovering Tail Mine from a Coal Preparation Plant Using Non-Phase-Change Thermo-Compression Drying Technology
Authors: Zhou Ming Yuan , Fan Li , Li Xiu Li , Ma Chang Wen
Published: October 2011

The paper elaborates on the operating principle and technical features of the thermo-compression drying process, the kinetics involved in the dewatering process, and the technological process system and equipment used. It is demonstrated by the case of the treatment of tail mine using the thermo-compression drying process that the moisture content of the products can reach lower than 12%.
Experimental Research on the Particles Reflux in the Particle Impact Drilling System
Authors: Ma Zhen Zhong , Zhang Yang , Wang Bin Bin
Published: October 2011

Particle Impact Drilling technology (PID) is a new drilling technology, which is designed especially to solve the oil and gas exploration under hard terrane. In PID system, the steel particles were added in the drilling fluid to impact rock. The particles would be recycled and put to use again, thus it is of great significance to adjust proper drilling fluid flow rate for steel particle’s reflux. The flow rate of drilling fluids carrying particles is influenced by the fluid viscosity, the annular gap between drill pipe and wellbore, the particle volume fraction and particle size, etc. This paper mainly studied the influence of the annular gap and the flow rate, while the other factors keep constant. Both experimental method and dimension theory were employed in the research. Furthermore, empirical formula was proposed to describe the mechanism.
Oil and Gas Accumulation Rules and Controlling Factors on Shuang 1 Member in Moliqing Area
Authors: Yang Ling , Bao Zhi Dong , Hou Peng Fei , Du Yi Jing , Liu Bao Lei
Published: October 2011

Through analysis on oil and gas accumulation characteristics, the vertical and horizontal distributions of reservoirs were summarized and the controlling factors of oil and gas accumulation were discussed in this paper. It is considered that reservoirs of Shuang 1 Member mainly distribute in Jianshan structural belt; the structural high or structure slopes are favorable accumulation zones, and the oil and gas accumulation and distribution is obviously controlled by local fault noses or fault block trap structures; the oil and gas always distribute near sequence boundaries; sublacustrine fan and fan delta sandbodies are favorable reservoirs for oil and gas accumulation; the normal fault sealing is very important for oil and gas accumulation of the Shuang 1 Member.
Experimental Study on Polymer Microsphere Emulsion Profile Control and Flooding in Heterogeneity of Reservoir
Authors: Cao Yi , Yue Xiang An , Yang Shu Ran
Published: October 2011

JYC polymer microsphere emulsion was synthesized by inverse emulsion polymerization. In order to explore the expansion mechanism of polymer microsphere, the variation of JYC sizes were detected. Through physical simulation experiments, the regulation of fraction flow and the result of displacement in heterogeneous physical simulation were measured. The results showed that the size of JYC microspheres swelled and increased in water at the reservoir temperature. After 60 days maintenance , the microspheres emulsion had the best dispersion and the property of expansion was prone to stability. Moreover, The appropriate injection concentration of JYC microspheres was 3000mg/L. JYC microsphere emulsion could improve the displacement efficiency of high permeability layer effectively, and expand the swept volume of low permeability layer, and enhance the ultimate recovery in different permeability ratio reservoir models.
Layers Subdivision and Waterflooding Timing in Low Permeability Offshore Reservoirs with Thin Interbedding
Authors: Liu Fan , Jiang Han Qiao , Li Jun Jian , Wu Xue Lin
Published: October 2011

Conducted by the results of numerical simulation and reservoir engineering method, the limit of layers combination and the optimum starting time of water injection are present in this paper. It was shown that in order to improve the development effect of relatively low permeability formation and increase economic efficiency of this kind of field, the reasonable multiple factor after subdividing layers should be less than 5, which means that the permeability difference should be less than 8. Meanwhile, in view of the actual situations and difficulties of offshore development, the injection and production project should be started synchronously.
Ultra Low Permeability Reservoir Characteristics and Origin Analysis
Authors: Yu Hong Yan , Li Hong Qi
Published: October 2011

As the result of its special structural feature and depositional setting, Ordos Basin formed large scale low-permeability reservoir. According to scanning electron microscope, casting sheet image, core observation, physical property analysis and core analysis testing, this paper summarized and analyzed ultra low permeability reservoir microscopic feature of Ordos Basin Baibao area Chang63. Reservoir microscopic feature is controlled by deposition and diagenesis. Deposition decided reservoir lithology, interstitial content and sizes of primary pores. Compaction and cementation of diagenesis destroyed primary pores, but denudation provided high range secondary pores, which improved storage space of the research area.
Advance Water-Flooding to Reduce the Stress Sensitivity Affect on Low Permeability Reservoir Development
Authors: Yang Jun Feng , Jiang Han Qiao , Rui Han Dong , Xie Xiao Qing
Published: October 2011

Physical simulation experiments were made to research on the stress sensitivity on physical property of low permeability reservoir rocks. The experimental results shown that effective pressure had good exponential relationship with reservoir permeability. Combining with materaial balance method, reservoir engineering and rational deducation was made to reserach on water-flooding timing of low permeability reservoir development. Several production targets were obtained by these method, such as formation pressure, water and oil production, water cut and so on. The results shown that advanced water-flooding was very important in low permeability reservoir development to reduce the bad impact of stress sensitivity on formation permeability and maintain formation pressure.