bluuebunny/crossref_metadata_2025 huggingface dataset:
How Channel Promotions and Brand Promotions Work on Dual Markets Competition Together Based on a Weakest Traditionally Retailer: From a Three-Dimensional Simulation Analysis Perspective
Authors: Li Pei Qin
Published: June 2012

Channel promotions compete against brand promotions among two manufacturers and one traditional retailer in e-commerce age. Being a leader the first strong manufacturer is not only the weakest traditional retailer’s supplier but also a competitor to the second weaker manufacturer in the internet at the same time. The paper focuses on three supply chain partners’ dynamic games in dual channels and finds out their optimal promotion competition decisions. By three-dimensional simulation analysis it reveals some objective laws of management decisions, such as limits of the traditional retailer’s living space in dual markets competition, and the conditions that all of the three partners could join in the dual markets competition, especially the strong manufacturer 1 could take part in the online market competition, and the strong manufacturer 1 should control its Internet brand promotion level to keep its strong status, etc.
Low-Carbon Economy: An Essential Path for China to Address Climate Change
Authors: Yan Ling Yu
Published: June 2012

Since the industrial revolution, with the expansion of the global population and the rapid economic development, global climate warming and a series of environmental problems, which caused by the overuse of fossil energy, have become a hot topic all over the world. This paper systematically reviewed the development of low-carbon economy at home and abroad, in-depth analyzed the internal and external pressure, which the development of low-carbon economy in china must face at the moment. Based on this, with the scientific development as a guide, the paper puts corresponding strategies and suggestions, which should be taken to develop low-carbon economy in our country without affecting the socio-economic development.
Reduction Potential of Carbon Emission from Inland Water Transportation Activities of Jiangxi Province
Authors: Zhang Wei , Cao Shu Yan , Gu Yu Fei
Published: June 2012

Inland shipping is an important transportation mode that has increased over time in Jiangxi Province of China. CO2 emissions from inland shipping are significantly increasing and have remarkable impact on air quality. And CO2 reductions from inland waterborne transportation modes are therefore urgently required to reduce the impacts of climate change. CO2 emissions from inland shipping of Jiangxi Province are calculated by utilizing activities based energy consumption data, and potential CO2 reduciton are estimated using ASIF equation. Total emissions from inland ships of the province were estimated at 297 Mt CO2 in 2009, 3.3 times of that in 2000, and potential CO2 reduction would be in the relative range of 27% to30% in 20 15 and of 35% to 40% in 2020, compared to baseline projections of business-as-usual.
The Scenic Area Folk-Based Ecological Protection Plan of Lugu Lake
Authors: Li Chang Qi , Xiang Fan
Published: June 2012

This article first analyzes the concept, features, functions, of folk- based Scenic, summarizes the current problems in the development process. Then the study of ecological destination - Lugu Lake Scenic Area in detail analyses the natural environment and socio-economic and cultural , and puts forward the sustainable ecological development mode for Lugu lake scenic .　 Folk-type of scenic areas is preserved considerable local houses, ruins legacy, crafts, folk customs and religious rituals and facilities of the social scenic area. It has unique folk landscape features, and no shortage of beautiful natural landscape. It’s main functions are researches education, tours, activities, special education and landscape experience.
The Study on Government’s Ecological Responsibility in Ecological Civilization Era
Authors: Xing Wei , Zhu Lei , Guo Xiao Tong
Published: June 2012

The background of ecological civilization and the request of ecological environment have required the government to bear the new responsibility, that is ecological responsibility. Only when the relations of ecological civilization and sustainable development, ecological economics and ecological benefit, and so on, can be straightened out, government would recognize the major connotation of ecological responsibility and bear it for the society and the public in the new era.
The Study on Problems and Strategies for Low-Carbon Industry Development
Authors: Chen Chun Yan , Lv Jin
Published: June 2012

Under the background of dealing with global warming, low-carbon economy has been chosen by countries in the world seeking for the balance between economic development and environmental protection, and low-carbon industry has become the foundation for development in low-carbon economy. This paper puts forward corresponding solutions to existing problems which covers structural optimization of low-carbon industry difficult to achieve in a short term, the shortage of the core technologies, financing difficulties, and ineffective co-operation of government and enterprises.
Sustainable Development: Tenant Theory
Authors: Cai Hui Wei
Published: June 2012

In the past 10,000 years, mankind was primarily engaged in agriculture and animal husbandry. Its economic development did not cause too much destruction of the Earth's environment. But in the recent 300 years, coal mining, oil extraction, land reclamation, mineral exploitation, lumbering, fishing, chemical and nuclear industries, etc., resulted in a variety of ecological disasters. The atmosphere and water resources, soil layers have been seriously polluted. The deteriorating environment reminds mankind that economic development can not sacrifice the environment. For the sake of sustainable development, this paper puts forward a new theory: Tenant Theory. This theory regards mankind as a tenant living in the big house, the biosphere. Its vertical distance is only about 20 kilometers. All the activities of the tenant could not destroy the house. But, this tenant has always been damaging the house unconsciously. In order to obtain an opportunity of sustainable development, mankind must adjust its values and patterns of behavior. This theory is first presented in this paper, it warns that mankind should recognize own place in the great nature, and know how to think and how to behave so as to obtain sustainable development.
Applying SWOT-AHP Analysis in Sustainable Marine Development Plan: Case Study in Shantou Municipality
Authors: Kong Hao , Xue Xiong Zhi , Zhang Xiao Yin
Published: June 2012

Having understood the disadvantages of traditional marine development mode, the sustainable development mode, which makes overall planning of land and sea and endorses equal importance to both development and protection, is attracting more and more attentions from coastal regions. To formulate the right orientation of marine development, this thesis attempts to apply SWOT-AHP method, a combination of qualitative and quantitative analysis, into strategy formulation. And, by introducing revision coefficient, this thesis modifies the current quantitative calculation methods. Finally, a SWOT-AHP analysis system of sustainable marine development plan has been constructed. In the study of Shantou marine development, strength, weakness, opportunity and threat factors have been listed through symposium and data analysis; attribution and impacts of these factors are calculated from experts’ evaluation. Based on these scores, a strategic quadrilateral is built, which could directly reflect the orientation of Shantou marine development. According to the analysis results, we can see that the advantage of Shantou marine development is obvious. Shantou should take growth strategy to make better use of its strength and opportunity factors; and transform its development mode from the traditional overexploitation to a sustainable one, which highly emphasizes on protecting marine ecological services and achieving the equilibrium of both ecological civilization and economic growth.
Study on Sustainable Design Strategies Based on the Elements of Product Design
Authors: Zhang Yong , Xu Bo Chu
Published: June 2012

By providing a systematic analysis and comparing environment-friendly concepts, thorough researches about meanings of green design,eco-design and sustainable design were offered,and pointed out that eco-design and green design have mainly brought into focus on product technology elements, while those methods of product technology level always have obviously insufficient to change users behavior. So this paper attempted to outline some operable sustainable design strategies from the perspectives of product form elements and product function elements. In the aspect of product form elements, the core of strategy is that let nature visual through bionic design and edification design,which will be helpful to deeply enhance users’ environmental consciousness, bring users instinct emotions back to nature, and reconstruct the harmon vivid relationship between nature and human. In the aspect of product function elements, the strategy is that creat the constrainted and guiding operation function through constraint principle and unconscious design,which will be helpful to deeply change users careless behaviors towards more sustainable practices.
Marking and Evaluating Index of Scientific Research Nurturing Teaching in Universities
Authors: Yang Wei Jun , Zhang Gui Jin , Zhang Ting Ting , Yuan Shuai
Published: June 2012

Experts and scholars have debated for the relationship and importance of university researching and teaching for a long time, owing to the problem that classroom teaching is not attached importance exists objectively, and becomes more serious. Through the direct analysis of teaching activity which is sufficient to embody the content and methods of the scientific research, the effectiveness of university research nurturing teaching is very notable. The teaching content and core knowledge is studied by taking a course as an example. Through the introduction of scientific research achievement, internationalization, and engineering elements, the mark of scientific research nurturing teaching is embodied, and then the operable evaluation index of scientific research nurturing teaching is put forward, which is expecting objective assessment of the connotation of teaching in order to provide a reference for the revision of China's higher education quality evaluation system and to promote the improvement of the quality of university teaching.
Comparisons of Cloud Computing Models and Technologies
Authors: Hu Yu
Published: June 2012

Cloud computing is a model for enabling convenient, on-demand network access to a shared pool of configurable computing resources that can be rapidly provisioned and released with minimal management effort or service provider interaction. Cloud computing allows new ideas, business concepts, and prototype systems to rapidly move to market, which represents a competitive advantage. Some cloud computing models and technologies are compared in this paper.
The Parameter Optimization and Field Application of Truss Cable Support System in a Thick Fragmental Coal Seam Roadway
Authors: Zhang Xiao Kang , Jiang Hong Jun , He Fu Lian , Weng Ming Yue
Published: June 2012

For the support problem of set-up room to be 7.8m wide with thick and broken coal roof in Pangpangta coal mine, the truss cable support system is adopted to control the set-up room surrounding rock. The main support parameters, such as cable length, cable angle and distance between orifice and side of the truss cable support system are simulated and optimally designed by using numerical simulation software FLAC3D, by which the support scheme is designed reasonably. The support scheme is successfully tested at set-up room No. 10101 in Pangpangta mine. The set-up room deformation is small, and the support system is safe and reliable. This kind of support technology can be widely used in the similar set-up rooms.
An Arithmetical Function and the Divisor Product Sequences
Authors: Yang Ming Shun , Tu Ya Juan
Published: June 2012

Let n be any positive integer, Pd(n)denotes the produce of all positive divisors of n. Let p be a prime, ap(n)denotes the largest exponent (of power p) such that divisible by n. In this paper, we shall use the elementary methods to study the mean value properties of ap(Pd(n)), and give an interesting asymptotic formula for it.
An Interpolation FFT Algorithm with High Accuracy
Authors: Liu Shou Ming , Shi Hong Wei , Jiang Yan , Min Xu , Chen Gen Yong
Published: June 2012

To further improving the precision of harmonics measurement, a new interpolation FFT algorithm based on Rife–Vincent (I) window is provided in this paper. First the spectrum leakage of FFT briefly and the frequency response of the Class I Rife- Vincent window is discussed, and then paper analyzes the interpolation algorithm on Rife–Vincent (I) window in detail. At last the cubic spine function is adopted to calculate the frequency and the harmonic amplitude modification coefficient. An example of simulation is given, and simulative calculation results show that Rife–Vincent (I) window interpolation algorithm by using cubic spine function has the amplitude error less than 1×10-6 % , the frequency error less than 1×10-7Hz, and the phase error less than 0.0001%. Comparing with other cosine windows interpolation FFT algorithm, the new interpolation FFT algorithm based on Rife–Vincent (I) window has the highest accuracy.
Text Classification Combined an Improved CHI and Category Relevance Factor
Authors: Zhang Pei Ying
Published: June 2012

Text classification is the task of assigning natural language textual documents to predefined categories based on their context. The main concern in this paper is to improve the accuracy of text classification system combined an improved CHI method and category relevance factor. Firstly, use an improved CHI method to select features from the raw features aim to reduce the dimensions of the features. Secondly, through the TF-CRF method to calculate the feature weight, this method mainly consider that the features have different distributions in different categories. Finally, we carried out a series of experiments compared with other methods using the F1-measure. Experimental results show that our new method makes an important improvement in all categories.
The Study on Gas Drainage to Gob with Long Bore-Holes at ChangPing Coalmine
Authors: Liu Jun , Wang Lin , Xin Xian Yao
Published: June 2012

Based on lots of gas emission from gob in mining faces, and the actual situation that gas accumulates in the top corner of the working face in Chang Ping coal mine, it is introduced in the paper that the successful experience about the technology of gas drainage to gob with long bore-holes along roof strike, the conclusion would be had obtained obvious security and economic benefits.
Using Transfer-Entropy TOPSIS and BP Neural Networks Model to early Warning of External Environments of Life Cycle Asset Management
Authors: Yan Qing You , Wang Xiao Ya , He Si Qi
Published: June 2012

The Life Cycle Asset Management (LCAM) was implemented by the development of smart grid promoted Grid Corporation to change the style of asset management. The external environment of LCAM is a development and changing system which had some characteristic with multi-agent, multi-level and multi-dimensional structure. Therefore, it is imperative requirement of implementing LCAM to .correctly understand and grasp the changing trends of external environment. The purpose of this paper is to propose an external environment early-warning model with LCAM to address the problem with how to grasp the change trends of external environment. This paper first calculated the weight of external environments by TOPSIS based transfer-entropy with survey data. And some significant external environment factors would be selected to be as the input vector of BP Neural Networks. Then the BP Neural Networks model was employed to early warning the situation of external environment. The results showed the superiority of the above two approaches in external environment early warning.
Construction of Digital Mine and Key Technologies
Authors: Lin Hui , Liu Pei , Li Wei , Zhang Lian Peng , Ji Ya Zhou
Published: June 2012

In China, the mine is facing a stern challenge over its environmental protection, the limitation on its structure and function within its subsystem, optimization of its limited manpower, financial and material resources and its sustainable development. Digital mine is come up with to deal with all these problems. The Digital Mine can be liken to “a logistics supply chain”, the basic characteristic is the high-speed network, with broadband and two-way communication system, used as “path map”, which shall make sure the fast delivery of all the data within all the relevant enterprises in the country; It consists of vehicles, which refers to the techniques of Mine CAD, virtual reality, mine simulation, scientific calculation, artificial intelligence, visualization and office automation; goods, which refers to mine data and mind application model; package, which refers to 3DGM(3-Dimensional Geographical Model) and data mining; security system, which refers to the collection and renewal system of mine data; and dispatching system, which refers to MGIS(Mine Geographical Information System), the common carrier of the entire information and office decisions, controlling the use and operation of all vehicles as well as all of the goods production and the package system. The basic structure of the Digital Mine is composed of two parts: digital ground and digital mine. The digital ground is a management information system based on the EPR (Enterprise Resource Planning) and spatial information infrastructure and information system based on 3S technology and computer network. The digital mine regards the mine geology and surveying data as basic information data for spatial positioning, furthermore, inputting other relevant information if necessary, such as mining working-face, excavating working-face, underground chamber, mechanical and electronic equipments, ventilation and safety device, underground pipeline and communication and others, forming a spatial database. Thus, the entire mine’s information system of management and service and decision support system is established. The Digital Mine is a huge systematic project, involving 3S (GIS, GPS, RS), IT (Information technology), mine science, virtual reality technology and visualization technology. Based on computers and network communication, the Digital Mine realizes the digitization of storing, transporting, expressing and applying of all the relevant spatial data and attribute data, including mine construction, exploration, development, mining, environmental protection and control. In addition, it is also a huge artificial intellectual system that integrates digital construction, digital exploration, digital mining, digital environmental protection and digital forecasting based on data dictionary technology, data warehouse technology, WebGIS, virtual reality technology, multimedia technology, CASE technology and artificial intelligence technology.
Early Cambrian Seismic Events and Their Tectonic Significance in Western Zhejiang
Authors: Guo Fu Sheng , Yan Zhao Bin , Chen Liu Qin
Published: June 2012

The two early Cambrian seismic events could be found from sedimentary rocks at Peilingjiao section of Kaihua County, Baishi and Fangcun sections of Changshan County in western Zhejiang, except for Jiangshan area. The seismic event at Baishi outcrop can be correlated to the second seismic event at Peilingjiao section. Taking Fangcun as epicenter of the second seismic event, the magnitude of paleoseism in western Zhejiang is about 7~7.6. According to investigation on regional distribution of seismic events, the two seismic activities should be regulated by large Kaihua-Chun’an fault, but unrelated with Jiangshan-Shaoxing fault or Changshan-Xiaoshan fault. However, the formation time of Kaihua-Chun’an fault has not yet been determinate. Based on controlling on Silurian, the possible formation age was inferred to early Paleozoic. The distribution characteristics of seismites indicate that the Kaihua-Chun’an fault was already being active during early Cambrian and seismic activities may be response to Sinian tectonic events in western Zhejiang. By the way of analysis on paleoseismic rhythm, the time interval of the two seismic events in western Zhejiang is less than 5.0 Ma, which may be the result of early frequent activities of Kaihua-Chun’an fault.
Numerical Research on the Floor Heave Control of Deep Roadway in Coal Mining
Authors: Xiao Fu Kun , Zhang Chun Jie , Gao Li Wei , Yue Yang Yang
Published: June 2012

On the engineering background of coal mine roadway orbit, according to the destruction of its original roadway, the paper have analyzed the situation of the deformation in the roadway , using the method of numerical simulation. Besides, it also determined the stress distribution and the forces supporting of roadway in the deformation process. Geological conditions, support patterns and bad construction are considered as the main factors of roadway damage and new support method is given. Numerical simulation method is used to study mechanism about anchor rod, anchor cable and anchor mesh coupled with the surrounding, bottom corner anchor rod and grouting to determine the optimal program. The new program is applied to the practice field and monitored, indicating that the application has a very good effect.
Numerical Study on Shocking Coal Seam of Multi-Points Explosion with High-Pressure Gas
Authors: Gao Kun , Wang Ji Ren , Jia Bao Shan
Published: June 2012

The permeability of coal seam is an important parameter for the gas extraction and gas outburst control. However, most of the coal seams are low-permeability with outstanding characteristic in China. Therefore，it is a good technology to provide the theoretical basis for increasing the permeability of low-gas- permeability coal seam by shocking with high-pressure air. Based on the percolation theory of porous media and combining the gas pressure change after shocking the coal seam with high-pressure air, the solid-gas coupled mathematical model is presented for the flow in the coal seam. By applying the software, the numerical simulation is computed and analyzed for the gas pressure evolution owing to the multi-spot continuous shocking the coal seam by the high-pressure air under the different pressure values and strata pressure.
Practice and Simple Analysis of Forced Roof Caving Technology Using Pre-Splitting and Blasting Methods
Authors: Li Chuan Ming
Published: June 2012

Combined with forced roof caving technology using pre-splitting and blasting methods with deep or shallow borehole, this research illustrates the construction environment and implementation methods in detail, analyzes implementation effect and strata behaviors of working face at the length, and discusses the features and adaptive conditions of forced roof caving technology with pre-splitting and blasting at close range, which has a certain directive significance and reference value to engineering practices with similar conditions.
The Numerical Simulation for Seepage Rule of Coal-Bed Methane with Hydraulic Cutting Seam Mining Based on Matlab
Authors: Yang Xin Le , Zhang Yong Li , Ren Chang Zai
Published: June 2012

It’s an effective ways to hydraulic-cutting seam for drainage that solves gas disaster and prevents impact pressure in mining. In order to get the seepage rule and productivity prediction of hydraulic-cutting for coal-bed methane(CBM) mining, the theory of seepage mechanics combined with elastic-plastic mechanics was used to set up a mathematical model and the boundary conditions and initial conditions was given meanwhile. The Matlab software was used to obtain the variation rule of coal-bed stress field, gas pressure field and gas extraction yield. The simulation results show that the effective stress is released after hydraulic-cutting seam used and the effect of unload is obvious along seam; the numbers of crack and fracture increases and the length and width of crack and fracture improve. So the permeability of coal seam enhanced and the absorbed gas disorpted greatly from coal seam because of the increase of contact area. The extraction yield of gas is bigger to hydraulic-cutting seam than conventional drilling. The simulation results show the advantage of hydraulic-cutting seam for CBM extraction and the method of simulation is significant to the execution project and productivity prediction of hydraulic-cutting seam for CBM industrial production increasing technology.
Causation Analysis of Roof Cutting and Support Crushing in Shallow-Buried Large Mining Height Long Wall Working Face of Western China
Authors: Ren Yan Fang , Xu Gang , Mao De Bing , Liu Jiang
Published: June 2012

During the mining process of shallow buried long wall working face, the breaking of main roof easily result in fracture belt’s connectivity with the surface. The paper has studied the causation of roof cutting and support crushing in shallow-buried large mining height long wall working face of Suancigou coal mine which is in Ordos Inner Mongolia. The main reasons are as follow, poor effect of forced roof caving; unreasonable structure type of support; lower setting load; unevenly stressing between front and rear columns; low advancing speed or the working face. So in order to avoid the fully mechanized supports crushing accident, the working face advancing speed should be accelerated during the period of the pressure change of working face.
Deep Shale Oil Extraction Integrated with Carbon Dioxide Sequestration
Authors: Zhou Xi Tang , Yu Zhi Dong
Published: June 2012

That injecting carbon dioxide into the shale layer below 500 m to extract the shale oil is a method of oil shale exploitation that integrating environmentally friendly energy production and greenhouse gases sequestration. It has been shown by ground test that it is thermodynamically possible to extract shale oil with supercritical carbon dioxide (SCD). However, the prospect of ground extraction is influenced by low extraction rate and difficulty to extract the large molecules. It is fairly feasible if extraction by injection in situ together with the addition of surfactant such as APG for it doesn’t involved with factory building and power consumption. Several questions about the research situation of shale oil extraction and the problems to be researched about shale oil extraction with SCD have been discussed in the paper.
Experimental Study of Macroscopic Tensile Fracture Properties of Brittle Rock at High Temperature
Authors: Wang Zhi , Rao Qiu Hua
Published: June 2012

The Mode I fracture toughness (KIC) and the Crack Tip Opening Displacement(CTOD) of rock at high temperature are measured by three-point bending test. The KICis increased with the increase of temperature and decreased when the temperature reached its critical value (200°C). The internal structure of rock be changed as the temperature increasing and the other mechanical properties of rock, such as tensile strength, compressive strength, elastic modulus, etc. also show the same law with the KICwhich lead the tensile stress hard to reach its critical value. The CTOD increases with the increasing of temperature until the load reach the peak load and the specimens at different temperatures have the same rule.
Ground Settlement Prediction Model and its Application for Tunneling Engineering above Mined-Out Regions
Authors: Wang Shu Ren , Zhang Hai Qing
Published: June 2012

Although many types of curve fitting methods were used in ground settlement prediction, it is due to every prediction method was not perfect, they have some defects and shortcomings to some extent and ground settlement prediction be up against huge challenge. Usher model, being used for economic and resources prediction, is introduced to ground settlement prediction as a new method, and its mathematics features are also analyzed. After comparative analysis, Origin software is selected for parameters solution of Usher model with an explanation of the solving process. Based on the Shipogou tunnel project which through the mined-out regions in Qingdao-Yinchuan highway, the Usher model for ground settlement is established combining to the field data, of which the parameters are solved with the user-defined function and nonlinear tool of Origin. The predicting results being compared with that of grey model and hyperbolic model, it shows that Usher model is of good adaptability, high accuracy, simple and coinciding well with measured data.
Monitoring Mine Subsidence with Time-Series SAR Interferometry
Authors: Wu Hong An , Zhang Yong Hong , Zhong Wei Fan
Published: June 2012

In this paper, the mine subsidence in Luanchuan county, Henan Province is investigated using time-series InSAR technique. 9 ALOS PALSAR images from May 11, 2008 to November 17, 2010 were used to generate 21 interferograms with vertical baselines less than 2000m. The results show that average subsidence velocity in Lanchuan mining area is 0 ~-59mm/year. The subsidence velocity in the north is faster than that in the south and the east faster than the west. Subsidence taken place mainly in Lengshui, Chitudian and Shizimiao Town with a velocity over -35mm/year.
Monitoring of Ground Fissures Induced by Underground Mining
Authors: Guo Jie , Ma Feng Shan , Zhao Hai Jun
Published: June 2012

Aim to analyze the development trend of ground fissures, new type of deformation monitoring device was developed. The device was used to measure the deformation of ground fissures in metal mine. The results showed it was feasible to monitoring the three-dimensional deformation. This study could provide reference for the similar condition mine.
Research and Design of Mine Water Warehouse Level Measurement and Control System
Authors: Zhang Xiao Kang
Published: June 2012

In the prevention and control of the mine water ，the water level of the dynamic monitoring storehouse play a pivotal role. Mine water warehouse water level measurement and control system which is designed by this paper is by programmable logic devices S7-200 and configuration king Wincc constitute a hardware and software. Between master of the computer and monitoring stations can bus is for data transmission. Laboratory simulation test and Field testing have a good effect, And it can realize the function of Sound and light alarm , dynamic display of water level-the time trend curve and data storage and reports, provide effective basis for coal mine water storehouse safety management and monitoring water-level.
Some Comments on “Unloading Rock Mechanics”
Authors: Zhao Bao Yun , Liu Dong Yan , Zhu Ke Shan
Published: June 2012

Conventional rock mechanics parameters are not derived directly from loading rock specimens in laboratory or in situ. Instead, they are determined by many different rock classification codes and criteria in different countries, and some of them such as RMR and Q systems are widely used in many countries. None of these codes and classification systems has considered the important factor of unloading of real excavated rock masses for engineering purposes until Professor Ha Qiulin proposed his new concept of unloading rock mechanics some two decades ago. Since rock masses are not a true CHILE continuum, the loading and unloading behaviors differ greatly from each other. Ha and his co-workers such as Li Jianlin have demonstrated that strength and deformational characteristics, initial rock stresses, scale effects, creep, deformation and fracture patterns are quite different and stress path dependence is particularly emphasized. All these findings have practical significance and a brief introduction and some discussions will be presented in this paper.
Study on Optimal Roadway Bolt Supporting Scheme with Easy-Breaking Roof
Authors: Gao Feng , Huang Qing Guo , Liu Gui Ling
Published: June 2012

The roadway bolt supporting with easy-breaking roof is a complex systematic problem, and the success or failure of roadway bolt supporting is determined by pre-stress level in some sense. To well recognize the bolt supporting effect under different pre-stress level, the laneway which has cracky roof is taken to systematically analysis the changing situation of roadway’s stress and deformation by using 2-dimension finite difference code -FLAC2D.The theoretical analysis and practical observation results show that high pre-stress scheme is the best way to improve the roadway surrounding rock strength and to control the cracky roof roadway’s deformation. It has some references to engineering design, construction and maintenance for similar soft rock mines.
Study on Technology of Simultaneous Coal Mining and Gas Drainage of Thin Coal Seam in Laoyingyan Mine
Authors: Liu Hu Hua , Li Wei Guang
Published: June 2012

In order to improve production safety and the gas utilization in highly gassy coal mines, based on thin seam, poor gas permeability and low gas content in thin seams in Laoyingyan mine, the migration paths and abundant region of pressure-relieved gas in gob was studied by means of the strata displacement theory as well as movement regularity of gob gas. Simultaneous production system of coal mining and gas drainage was established in Laoyingyan mine, comprehensive gas drainage methods was adopted such as gas drainage method of highly-located roof crossing hole and the gas drainage method from gob. The results showed that gas drainage volume is 7.2m3/min, gas drainage efficiency was 36.3%, the phenomenon of gas-over-limit was eliminated. It was implemented that the gas resource safe, high efficient and green simultaneous coal mining and gas drainage under the premise of safe production of coal resources.
The Numerical Simulation of Gas-Pulverized Coal Two Phase Flow after Coal and Gas Outburst
Authors: Nie Bai Sheng , Li Xiang Chun , Liu Wen Bo , Wang Yang , Wang Xiao Yan , Tian Jian Wei , Zhu Gang
Published: June 2012

The gas-pulverized coal two phase flow law of gas is simulated by the use of the theory of jet after coal and gas outburst. Research results show that as the volume fraction of pulverized coal in outbursts mixture increases, the speed of two phase flow at the exit gradually reduces, jet core length shorter, turbulent longitudinal effect range smaller, jet width narrower. And dynamic head mainly concentrates in the jet core area and its distribution is more uniform in the roadways. The maximum speed of outburst two-phase flow decreases with the adding volume fraction of pulverized coal, that is higher the coal content in outburst mixtures, smaller the maximum speed after outburst. But a high content of coal have higher impact strike force which can cause major damage effect. The research may provide some theoretical basis for setting underground safety facilities, mine personal protection, disaster warning and emergency rescue.
The Supporting Research on 40110 Working Face Transport Tunnel of Dafosi Coal Mine
Authors: Han Jia Ming
Published: June 2012

40110 working face is located in CaiZiYuan Chengguan town of Binxian county.It is arranged as the third mechanized mining caving working face. According to the geological characteristic in the area, it was researchd on the roof and floor lithologic, structure, hydrology, gas, dust features and so on, and devised mining tunnel supporting about tunnels , section , horizon , support instructions by experience, calculating, analysis. Practical result shows that the two sides displacement and relative movement of the roof and floor effectively controled to ensure the daily production of coal mine by the tunnel supporting design.
Water-Inrush Mechanism while Fault Zone Secondary Activated in Mining
Authors: Sun Shi Guo , Feng Shao Jie , Lei Jia Hao
Published: June 2012

As many different size faults in the fully-mechanized sublevel caving mining area overlying rock, undermine the continuity of rock deformation, and the occurrence of different conditions, the impact properties vary widely. This paper studies the impact of faults on the water inrush with specific examples of project, obtained the discontinuous deformation on both sides of fault zone induce the fault zone secondary activate and result in it’s water transmitting ability dramatic increase; with the mining geometry increases, the water flowing-fracture zone height increase and lead to the water conductivity channel of faults connect with rock fracture zone, so as to constitute water inrush channel and likely to cause water inrush accident, so to explore the influence of fault for underground work safety has important theoretical significance and application value.
Power Control DSR Routing in Tunnel Environment Monitoring
Authors: Xu Deng Yuan , Hou Zhong Wei
Published: June 2012

As one of important technologies of IOT (Internet of Things), WSN (Wireless Sensor Networks) has been used in tunnel environmental monitoring. Tunnel environment monitoring has its particularity that WSN nodes show linear topologies. Traditional routing algorithms in WSN do not consider the linear topology of sensor nodes in tunnel and are difficult to realize long-time data transmission in limited battery power. In this paper, we propose Power Control Dynamic Source Routing algorithm (PC-DSR) by the thought of cross-layer design. Routing table is established according to the distance between nodes and the residual energy of nodes and optimum transmission power is calculated in order to save nodes’ power and prolong the life-time of the whole networks. Simulation results show that the novel algorithm can save node's transmission power, which increase the WSN lifetime of 12.3%.
Driving Mode at Pothole-Subsidence Pavement Based on Wheel Path
Authors: Pei Yu Long , Mao Cheng Yuan , Song Mo
Published: June 2012

Considering the fact that the forms of asphalt pavement potholes, subsidence and cement pavement potholes (collectively defined as pavement pothole-subsidence) are similar and they can influence traffic flow significantly, we put forward to use indexes such as Tangential Diameter Length, Normal Diameter Length, Depth, Lateral distance, etc to describe the characteristics of pothole-subsidence, and we also adopt AutoScope-2004 video detection system aided by artificial judging to investigate in the surveyed road section. According to different wheel paths, driving modes was classified into three types, influences of various pothole-subsidence on driving mode and speed was analyzed. We came up with conclusions as follows: one is that pothole-subsidence significantly influenced the variation of vehicle trajectory, 78.5% vehicles altered their driving direction, and the average rate of speed descent is over 20%.
Diagenesis and Controlling Factors of Kalashayi Clastic Reservoir in South of Tahe Oilfield
Authors: Wu Ya Sheng , Zhong Da Kang , Qiu Nan Sheng , Liu Kang Ning
Published: June 2012

The Kalashayi sandstone reservoir deposited in tidal-flat facies. Main diagenesis include compaction, cementation and dissolution, which compaction belongs to middle-weak, point to linear contact between grains and pore-space cementation by carbonate rocks; dissolution features that feldspar grains and carbonate cementation’s dissolution. The reservoir is mesopore and medium permeability reservoir in a current depth of 4800-5300m. The reason cause this mesopore and medium permeability reservoir are considered as the following factors. The physical properties of reservoirs are mainly controlled by sedimentary microfacies and diagenesis. The strong tidal channels and tidal creaks current leads to the composition of rock mineral pure, quartz content is high, the grains coarser, good sorting and low matrix. The early compaction was so little that some pores were conserved in carbonate cementation, and in the later diagenetic process, carbonate cementation were corroded to secondary pores.
Study on FEM Format Based on Non-Uniform Equivalent Beam
Authors: Zhang Guo Zhi
Published: June 2012

The computing method of non-uniform structure was study. The FEM format based on non-uniform equivalent beam was proposed. And the stiffness matrix based on FEM format was deduced. Moreover, through comparing with the results of FEM, the maximum error between them was about 11.1% so as to verify the accuracy of FEM format proposed. The study in the paper provides a new computing method and basis for design and calculation of similar non-uniform mechanical structures.
An Experimental Investigation on Hydrogasification of Coal Chars in a Fixed Bed Reactor under High Pressure
Authors: Zhou Yuan , Zheng Ying , Wang Wen Xi , Zheng Chu Guang
Published: June 2012

The Characteristic of Coal Hydrogasification Was Carried Out in a Fixed Bed Reactor by Using Chars of Datong Bituminous, Spain Lignite and Pingdingshan Bituminous. it Was Investigated that the Effects of Reaction Temperature (973-1123K), Reaction Pressure (3-7Mpa), the Char Preparation Temperature (973-1073K) and Catalyst (CaO) on CH4 Yield. the Three Stages Model Was Provided to Explain the Coal Hydrogasification Process. the CH4 Yield Increases Rapidly in the First Stage which Is Dominated by the Reaction of Active Groups (-O-CH3,-COOH,-CH2OH,-CH3) and H2. the CH4 Yield Keeps Constant in the Second Stage. the Releasing Rate of C-O-(C) and C-O-(H) Active Groups Dominates the CH4 Yield Rate. the CH4 Yield Decreases in the Third Stage which Is Dominated by the Reaction Rate of Carbon and Hydrogen. there Is Higher CH4 Yield under Higher Pressure which Is Related to the Higher Reaction Rate of Graphite and H2 under Higher Pressure. the Structure of Raw Coals and Chars Was Identified by FTIR. in Additional, the Influences of Char Structure and Catalyst on the CH4 Yield Are Discussed in the Paper.
Study on the Distribution Regularity of Accompanying Harmful Elements in the Scheelite in the Mineral Processing System
Authors: Liu Xu Qing , Xiang Ke , Cai Zhong Li , Kang Ming Xiong , Liu Chao
Published: June 2012

skarn-type scheelite; mineral processing system; tailings; lead; arsenic; distribution regularity
The Current Situation of Comprehensive Utilization of Coal Gangue in China
Authors: Yu Li Jing , Feng You Li , Yan Wei
Published: June 2012

Coal gangue is one of the largest industrial solid wastes in China; the comprehensive utilization of coal gangue has important social, economic and environmental benefits. In this paper, the coal gangue and comprehensive utilization have been discussed in detail. Through the survey results, expounds the development of the use of coal gangue and improve work with practical significance.
Application Research of White Mud in 660 MW Unit FGD System
Authors: Liao Yong Jin , Yang Qing Shan , Wang Yu Jia
Published: June 2012

White mud is generally known as the residue of soda ash production by ammonia-soda process. The treatment of it has been one problem in soda ash industry due to the large amount of production, strong alkalinity and corrosiveness. In China, the treatment of white mud is stacking currently, which not only occupying land but also causing environment pollution. The main composition of it is the calcium carbonate. If white mud replaces the limestone as the desulfurization agent in wet Flue Gas Desulfurization (W-FGD) system, it can attain the goal of treating the waste with another, achieve the circular economy between enterprises, and reduce the desulfurization cost significantly. In this paper, the research of white mud in 660 MW Unit W-FGD systems was investigated. Study shows that the properties of white mud and limestone are significantly different. Because of smaller particle size and active MgO, the alkaline and reaction activity of white mud are better than that of limestone, results to higher desulfurization rate and lower running cost. However, the purity of white mud is lower because of CaSO4, Cl-, and other impurities, so the dewatering system of gypsum needs to increase output by about 17%; the output of the slurry feed system needs to be increased by about 30%; the discharge capacity of wastewater needs to be increased by about 23 t/h.
Comparative Characteristics and Desilicon Ability of 10 Strains of Silicate Bacteria Screened from Different Bauxite Ores
Authors: Zhong Chan Juan , Sun De Si , Bao Hong , Chen Hao
Published: June 2012

Ten strains of silicate bacteria were screened from three bauxite samples in Jiangxi Province and Henan Province in China. The ten strains were determined as B. mucilaginosus according to the results of physiological and biochemical characteristics and desilicon ability. Bioleaching tests showed that the ten strains all can decompose bauxite ore and release silicon from bauxite, but had a large difference of desilicon ability among them.
Experimental Study on Pneumatic Classification of Fine-Metal-Powder
Authors: Ma Rui Xin , Shi Chang Sheng , Zhang Xin Xi
Published: June 2012

With the development of powder metallurgy industry, the fine-metal-powder classification becomes one of the vital techniques in powder technology. A pneumatic classifier without screen and mechanical moving parts is designed and developed. Three samples are used in the pneumatic classification experiments and the separation sizes are 45μm， 45μm and 30μm, respectively. The oversize ratio in fine powder can be reduced to less than 5% and the undersize ratio in coarse powder less than 15% when the air flow is suitable, simultaneously. The classification effect is satisfactory.
Influence of Processing Parameters on Dehydration Effect of Positive-Pressure Horizontal Filtration
Authors: Li Yan Feng , Huang Wen Feng , Zhu Rong Tao , Zhao Wen Da
Published: June 2012

The structure of filter cake obtained by the positive horizon pressure filtration process has more advances. The paper investigated some main influencing factors about feed concentration, filtration pressure, feed grain composition on dehydration effect. And paper designs the testing program and analyses the testing results. Then paper establish the mathematical model about the filter cake moisture, filtrate concentration, the capacity of handling dry slime and the experiment influence variables. The results show that the filter mass moisture decreases as the increase of feed concentration, filtration pressure and feed size. At the same time, the filtration time, filtration pressure and feed concentration have a little influence on filtration concentration, and handling capacity of dry slime has a proportion with feed concentration and filtration pressure and has a inversely-proportional relationship with filtration time.
Calcium Ion Treatment Behavior of Silk Fibroin/Sodium Alginate Scaffolds
Authors: Ming Jin Fa , Zuo Bao Qi , Jiang Yao Xing
Published: June 2012

The silk fibroin/sodium alginate scaffolds were prepared using lyophilization method. And then, the blend scaffolds were treated with calcium ions. The morphology of the blend scaffolds exhibited a thin layer structure before calcium ions treatment, and much more rod-like structure appeared at the layer surface with adding the increase content of sodium alginate in the blend scaffolds. After calcium ions treatment, much more rod-like structure disappeared after adding 30% sodium alginate or more in the blend scaffolds. Wide angle X-ray diffraction and Fourier transform infrared analysis results confirmed the crystal structure of silk fibroin was not influenced by adding the different content of sodium alginate, exhibiting the silk I and silk II structure co-existed in the blend scaffolds. And the same time, the average mass loss value of the blend scaffolds was higher than the pure silk fibroin scaffold, reaching 9.884%, 11.2%, and 8.626%, respectively, when the blend scaffolds contained 10%, 30%, and 50% sodium alginate, respectively. Thus, the silk fibroin/sodium alginate scaffolds should be a useful biomaterial applicable for a wide range of tissue engineering.