bluuebunny/crossref_metadata_2025 huggingface dataset:
Design and Realization of Greenhouse Data Gathering System Based on Freescale MCU
Authors: Wu Tao , Hu Chun Huai , Qin Rui , Chai Zhen Qiang
Published: December 2012

To measure whether the environment parameters reach the optimum condition to plant growth, an effective design scheme of measuring and gathering temperature and humidity is proposed. Freescale MCU MC9S12XET256 is used as the control core. The temperature sensor DS18B20 and humidity sensor HS1101 are used as well. The measure results are sent to MCU and displayed on LCD. The program is compiled by CodeWarrior integral development environment. Experiment result states clearly that this system can monitor environment temperature, humidity very well and has alarm function. It has practical value.
Binary Adaptive Ant Colony Optimization in Reactive Power Optimization
Authors: Hong Hong , Liu Fang
Published: December 2012

This article proposed an Adaptive Binary Ant Colony Optimization Algorithm, which is based on the dual network diagram, designed to state transition rules and information update rules, and then according to the algorithm processes adjust information volatilizing factor dynamically, Verify the validity and superiority of the algorithm.
Ultra-Lightweight Authentication Protocol Based on Distribution Terminal Fingerprint
Authors: Cheng Chun Ling , Wang Ya Shi , Sun Chun Ju , Zhang Zhi Hua , Wang Jiang Ning
Published: December 2012

With the development of information technology in power industry, information security of the distribution automation system is facing increasing challenge. To meet the device authentication demand and the limited resources in power distribution terminal, the concept of distribution terminal fingerprint is presented according to the physical and behavioral features in terminal. And then, an ultra-lightweight mutual authentication protocol based on the message authentication code algorithm is proposed. The message authentication code of the messages sent by both communication parties is calculated with the distribution terminal fingerprint as the key to achieve mutual authentication of the terminal and the master station without any cryptosystems. Finally, security and performance analysis is given. The results show that the proposed protocol can provide mutual authentication of the communicating parties, resist several attacks with small amount of calculation and simple protocol. Therefore, it can meet the resource requirements of the distribution terminal.
Architecture of the Monitor System in Ternary Optical Computer
Authors: Wang Xian Chao , Yao Yun Fei , Wang Chun Sheng , Sun Wei Wei , Wang Kang Zhe
Published: December 2012

The monitor system architecture in ternary optical computer (TOC) was discussed. There were some important modules, such as the client, network communication module (NCM), data preprocess module (DPM), operation-request scheduling module (ORSM), optical processor allocation module (OPAM) and the embedded system in the architecture. And the communication protocols between these modules were analyzed and designed. At the same time, the functions of the modules were introduced.
Application of Trusted Virtual Environment Module in Cloud Computing
Authors: Hu Yu
Published: December 2012

The Trusted Virtual Environment Module (TVEM) is a new mechanism for rooting trust in a cloud computing environment. The TVEM helps solve the core security challenge of cloud computing by enabling parties to establish trust relationships in a cloud computing environment where an information owner creates and runs a virtual environment on a platform owned by a separate service provider. This paper detailed discusses the TVEM used in the cloud computing environment.
Research on the Basic Framework of Digital Ocean
Authors: Liu Lin , Li Wan Wu , Zheng Sheng Chun , Wei Lu Qing , Xu Ting
Published: December 2012

This paper designs a frame system of Digital Ocean including the supporting layer, base layer, data layer, service layer, application layer and assurance layer. The framework system realizes the effective integration, exchanging and sharing of the marine information, the basic geographical information and all kinds of closely related economic and social information by using the open architecture and standardized service mode, and it provides the structure template for the construction of the Digital Ocean.
Robust Image Information Identification Algorithm Based on Time-Frequency Transformation
Authors: Deng Ming Hui
Published: December 2012

In this paper, a robust image watermarking method with one-dimensional improved S transformation is proposed which is robust against geometric distortion. This watermarking is detected by a linear frequency change. The chirp signals are used as watermarks and this type of signals is resistant to all stationary filtering methods and exhibits geometrical symmetry. In the two-dimensional Radon-Wigner transformation domain, the chirp signals used as watermarks change only its position in space/spatial-frequency distribution, after applying linear geometrical attack. But the two-dimensional Radon-Wigner transformation needs too much difficult computing. We propose a modified Gaussian window which scales with the frequency in an efficient manner to provide improved energy concentration of the S-transform. The proposed scheme can resolve the time-frequency localization in a better way than the standard S transformation. The watermark is embedded in the 1D improved S transformation domains. The watermark thus generated is invisible and performs well in test and is robust to geometrical attacks. Compared with other watermarking algorithms, this algorithm is more robust, especially against geometric distortion, while having excellent frequency properties.
Study on the Assemble Interpretation Method of Inter Well Tracer Test
Authors: Liu Tong Jing , Zhang Xin Hong , Xie Xiao Qing , Zhou Jian , Xie Shan
Published: December 2012

At present, test interpretation technology is still based on the rule and theory during 1960s-1980s, which wasn’t be developed and improved further in view of the new problems in field. The field practice and theory comparison have shown that these basic theory and interpretation model diverges obviously appropriate category, and have the singlet, unilateral problem of considered element, which can’t adapt to the quantification description of complex filtrate in porous medium. The basic theory and mathematic model of tracer test interpretation need to develop further, and interpretation means needs to improve corroboratively. From the point of numerical mathematics, the independent variables in reservoirs were found out and the objective function was constructed. Making use of improved real-number-style inheritance-arithmetic, the unitary parameters inversion and interpretation were accomplished in inter well tracer test.
Research on CAE Technology Education Approach and Development of Models System
Authors: Liu Xiao Min , Zhao Yun Wei , Li Kang , Zhang Jin Tao
Published: December 2012

With the development of science and technology, CAE technology plays an increasing important role both to the engineering and technical personnel in engineering and the college students. However, some problems are still in CAE education and training in China at present. The relatively simple content learning and testing can not meet the requirement. Consequently, it is significant to have research on CAE technology education approach and development of models system to improve the effect of the education. In this paper, we have deep research on the CAE practical education approach and then develop the virtual prototype model system which is rich in content; besides, the simulation animation library is also set up. In teaching process, CAI teaching method is mainly used to show the kinematical process of the mechanism, which, when played on computers, the motion process of mechanisms are fleshed out. Multimedia as a means o teaching -aid, can be very effective and helpful to students to understand the difficulties in teaching, especially in mechanical principles teaching. Compared with traditional teaching method, multi-media teaching method has the obvious superiority. In practice, students are in group collaboration, design their own prototype model through calling the parts and accessories in prototype model system, and then complete the kinematical and dynamical analysis on their prototype model. It shows that this teaching method has importance in promoting the quality of education in practice teaching.
Research the Several Organic Inhibitors Influence on Jamesonite and Marmatite
Authors: Wei Zong Wu , Wu Chuan Kun , Yu Zhong Bao , Huang Run Zhi , Mu Xiao
Published: December 2012

The study of flotation separation on two different mineral shows that inhibitors such as amino, hydroxyl, act. take no significant inhibitory effect on that kind of minerals; polyhydroxy compounds such as starch, tannic acid do not inhibit marmatite, but Jamesonite; the Congo red dye containing a number of sulfonic acid groups and amino can inhibit marmatite and Jamesonite, but especially for marmatite. The thioglycolic acid, containing thiol and carboxy, have a good selective adsorption, and adsorbent at the surface of marmatite, Selectively.
Research on the Air Leakage Law and the Control Technology of the Main Air Doors of the Mine
Authors: Xu Wei , Nie Wen , Zhao Shan Shan
Published: December 2012

Air leakage of the main air doors in the mine deteriorates the underground working environment and threatens both the safety production and the physical and mental health of workers. Based on the complex air-leaking problems of the main air doors, this paper has worked out a method by combining SF6 tracer technique and pressure energy test together. In this way, the air leakage law of the main air doors between the intake and the return airway of SHAOYAO coal mine has been determined: the total air leakage of the 10 sets of main air doors amounts to 499. 33m3/min; the amount of air leakage has positive correlation with the differential pressure of air leakage; on the basis of the law of air leakage resistance, the windage resistance of the main air doors has been calculated. According to the air leakage features of the main air doors, this paper also puts forward the control technology, such as spraying polyurethane foam, keeping the tightness of doorframe, etc. After field application, the amount of air leakage has decreased 56.1% on average. And accordingly, the air leakage of the main air doors has been effectively controlled and the underground working environment has been greatly improved.
Safe and Effective Production of Coal Mine Promoted by Coalbed Methane Reclamation
Authors: Deng Jun , Xu Yan Hui , Jiang Hua , Hu Shao Bo
Published: December 2012

Along with the rapid increase of energy consumption of China, more attention has been paid to the CBM as one kind of clean and high-quality energy. CBM is the greatest threat to the coal mining. If CBM is extracted and well used before coal mining, the environment will be improved and gas explosion accident in coal mine will be obviously diminished. The exploit and advantage of CBM improves the coal field exploration degree and coal mine production safety and efficiency.
Mining Method Optimization Based on Fuzzy Comprehensive Evaluation
Authors: Guo Qi Feng , Zhang Zhao Cai , Li Zheng Sheng , Liu Kun , Liu Huan Xin
Published: December 2012

According to the 8000t/d production capacity planning and high in-situ stress, high rockburst proneness in deep mining of Sanshandao Gold Mine, three mining methods were compared and analyzed from safety, technical and economic indexes. Fuzzy optimization model was built to select the optimal mining method based on mining indexes quantification and fuzzy analysis of mining indexes. The conclusion shows that Alternate Room-Pillar Mining Method with Ascending Backfill is the optimal mining method to satisfy the safety and high efficiency demand of deep mining in Sanshandao Gold Mine.
Seismic Prediction Method for Dark Mudstone Thickness of the Second Member of the Denglouku Formation in Northern Songliao Basin
Authors: Zhang Xue Juan , Zhang Lei , Yang Zhi Ru
Published: December 2012

The hydrocarbon source rocks in Denglouku formation of Northern Songliao Basin are mainly the grey mudstones in Deng 2 member. Combined with well and seismic information, this paper forecasts the mudstone thickness distribution of study area applying multiple seismic attribute quantitative prediction based on sedimentary characteristics. We also predict the plane distribution of dark mudstone-mudstone thickness ratio with stratigraphic sedimentary thickness information, horizontal result of seismic facies interpretation and dark mudstone-mudstone thickness ratio materials of well point. Eventually, we obtain the plane dark mudstone prediction result. Analysis indicates that the source rocks of Deng 2 member in Northern Songliao Basin mainly consist of three larger dark mudstone development areas and other sporadic small-scale development areas adjacent, which have the maximum dark mudstone thickness of about 357m located near Songji 6 well.
Hydraulic Fracturing Process: Roles of In Situ Stress and Rock Strength
Authors: Feng Yan Jun , Shi Xiu Wei
Published: December 2012

This paper presents results of a comprehensive study involving analytical and field experimental investigations into the factors controlling the hydraulic fracturing process. Analytical theories for fracture initiation of vertical and horizontal borehole are reviewed. The initiation and propagation process of hydraulic fracturing is performed in the field by means of hydraulic fracturing and stepwise hydraulic fracturing, the effect of factors such as in-situ stress and rock strength on fracture propagation process is studied and discussed. The fracture initiation pressures estimated from the analytical model and field experiments are compared as well as the fracturing process during case 1and case 2. Results from the analytical model and field experiments conducted in this study are interpreted with a particular effort to enlighten the factors controlling the hydraulic fracturing process.
Attitude Measurement and Optimization for Horizontal Directional Drilling Based on MARG Sensor
Authors: Su Yi , Liu Yang , Li Xiao Kun , Qi Xin
Published: December 2012

Attitude measurement of the drill bit is the key for horizontal directional drilling, which determines the final positioning accuracy. As for disadvantages of existing algorithms, a method is proposed to get the azimuth, the inclination, and the tool face angle based on gyros. In order to improve attitude measurement accuracy, a quaternion-based attitude complementary filter algorithm is adopted. The accelerometer and magnetometer are used to measure the components of the earth’s gravity field and magnetic field to compensate for gyro drift errors over time, while the gyro ensures the stability of the drill with dynamic acceleration and enhances the robustness of the system. Detailed analysis and simulation results are presented. Results show that the quaternion-based attitude complementary filter algorithm using multiple MARG (Magnetic, Angular Rate, Gravity) sensors can effectively reduce the gyro drift errors and make the attitude measurement error less than +/-0.3 degree.
Coal Pillar Size of Ultra Closed Distance Seam and Layout of Mining Gateway
Authors: Ju Chun Lei , Zhao Guo Dong , Gao Feng
Published: December 2012

The support effectiveness of mining gateway at closed-distance seam is determined by the layout of mining gateway and the stress effect of the upper coal pillar load on the bottom seam. The stress effect is affected by the coal pillar size and the properties of the coal pillar and surrounding rocks. These factors may cause the variation of the stress concentration, which could cause the difference in the stress distribution on the bottom seam. This paper studies on the proper coal pillar size of ultra closed-distance upper and bottom coal seam in Fu Cheng coal pit and the layout of the mining gateway.
Shallow Gas Distribution Character of Heidimiao Reservoir in Southern Daqing-Changyuan Based on High-Resolution Sequence Stratigraphy
Authors: Jia Huan Jun
Published: December 2012

By applying the data of drilling core, well logging and 3D seismics and studying the sequence framework, sedimentary microfacies and shallow gas distribution law, it shows that the Heidimiao Reservoir is vertically divided into a long-term, 4 intermediate-term and 25 short-term base-level cycles. Heidimiao Reservoir is of the gentle river controlled sedimentary system of delta front The main microfacies are underwater distributary channels, mouth bars and distal bars. Shallow gas is vertically distributed in the reservoir sandbody at the period of intermidiate hemicycles of late decrease or early rise in long-term hemicycles of the early fall. It is reasonable match of distribution discipline of single sandbody, gas source faults and structure that is the dominated factor for shallow gas plane accumulation. Based on the study above, 90 gas traps are depicted by applying the gas-water interpretation templates.
Study on Safety Management Based on Synergetic
Authors: Sun You Xia , Li Xing Dong
Published: December 2012

Based on synergetic, this paper ascertained state variables of the safety management system by factor analysis. Then the order parameter (safety culture) was selected. Finally, in order to realized the change of safety management from rigid administration to people-oriented management, the slave function of safety culture was analyzed and the management methods of safety culture were stated.
Formation Mechanism of Coalfield Fire and Progress of Research on Extinguishing and Control Technology
Authors: Jin Yong Fei , Deng Jun , Yue Ning Fang , Zhang Xin Hai
Published: December 2012

This article makes a systematic analysis of the formation mechanism of coalfield fire and the progress of research on the extinguishing and control technology, lays the stress on the exposition of the findings from the researches made by the scholars at home and abroad from two aspects such as the breakout, development and evolution mechanism of coalfield fire and the extinguishing and control technology for the coalfield fire, including the coalfield fire combustion reaction kinetics mechanism, coalfield fire zone coal petrology fluid solid thermal coupling mechanism, coalfield fissure medium mass transfer model, research on natural convection and porous combustion characteristics, coalfield fire detection and identification, monitoring and control technology, extinguishing and control technology, process and material, and still considers the accurate detection and identification of the fire source position, new grouting extinguishing material and process, and the action mechanism of the environmental impact as the difficulties to be solved immediately.
Numerical Simulation of the Deep Mining of Phosphate Ore Body Based on Digital Image Processing
Authors: Yao Jun Wei , Li Sheng Zhou , Li Ming Hui
Published: December 2012

Based on digital image processing, use Matlab mathematical software to write Flac3D modeling interface program, and suppress noise transported from CAD software, for establishing numerical simulation model rapidly. With the No.59 exploration line profile picture of Yunnan Phosphate Group Jinning mine as the object of study, which is transformed from the open pit to deep underground mining, to establish Flac3D model mined with the way of room and pillar method study, it shows that: (1) using the method of multi-threshold segmentation, build the appropriate mask to suppress image noise effectively; (2) with controlling the horizontal grid cell size, achieve uniform mesh of the model; mesh at the strata border with the triangular grid, for weakening the jagged edges; (3) as the stopes excavated gradually, the movement extent of roof and floor is increasing influenced by mining; the roof is relatively stable, while the stress concentration factor of room pillars is bigger, therefore some measures should be taken to prevent the mine wall caving. The numerical simulation results provide a reference for the design feasibility study of phosphate mining and have a guiding significance for parameter optimization as well.
Analysis of Casing Strength after Casing Wear in Ultra-Deep Rock Salt Formation
Authors: Zhang Fu Xiang , Ge Wei Feng , Yang Xiang Tong , Zhang Wei , Peng Jian Xin
Published: December 2012

To alleviate the problems of casing collapse induced by the coupling effect of rock salt creep and casing wear, the effects of salt creep, attrition rate and casing abrasive position on the equivalent stress on casings in non-uniform in-situ stress field is analyzed by finite-difference model with worn casing, cement and salt formation. It indicates that, creep reduces the yield strength of worn casing to a certain extent; Equivalent stress on casings is bigger and more non-uniform when the abrasion is more serious; Wear position obviously changes the distribution of equivalent stress on casing, and when the wear located along the direction of the minimum in-situ stress, equivalent stress on casing could be the largest that leads to the casing being failed more easily. Equivalent stress on casings increases gradually with creep time increasing and will get to balance in one year or so; In addition, new conclusions are obtained which are different from before: the maximum equivalent stress on casings is in the direction of the minimum horizontal stress, only when the attrition rate of the casing is little; otherwise, it is not. This method could help to improve the wear prediction and design of casings.
Research on the Drilling Technique of Coal Bed Methane
Authors: Wen Ji Wei , Chen Chen , Qian Fang
Published: December 2012

Coal bed Methane(CBM) is commonly known as “gas”，of which the main component is methane. It mainly exists in the coal seam in the adsorption state, not only different from petroleum which is also fluid but in the liquid state, but also different from the conventional natural gas which exists in the formation in the free state. In the present, the drilling technique of coal bed methane is mainly based on the drilling technique of petroleum. But as the coal bed methane is attached to the coal seam and different from the conventional hydrocarbon reservoir in the physical and mechanical properties and in the storage, it determines the particularity of the drilling techniques. This paper mainly discusses the drilling technique of coal-bed methane in order to provide some useful reference. Coal bed methane is an important type of non-conventional natural gas which has great potential for exploration.
Study on Technology of Fully-Mechanized Sub-Level Caving Mining Technology in the Datong Permo Carboniferous Coal Seam
Authors: Yu Bin , Zhao Jun , Xia Hong Chun
Published: December 2012

This thesis briefly introduced roof control technology in fully-mechanized sublevel caving mining with hard roof and hard coal seam, Mining technology , gas prevention and comprehensive prevention and control technology in spontaneous combustion of coal, which in longwall top-coal caving face with hydraulic support in thickness seam in the Datong permo carboniferous coal seam . New development directions of fully-mechanized sublevel caving mining technology in the Datong mining area in the next few years.
Decreasing Easily Slimed Gangue Minerals Effect on Copper-Nickel Bulk Flotation by Combinatorial Depressants
Authors: Li Qing , Ge Bao Liang , Liu Jie , Zhu Chao
Published: December 2012

This article research a low grade ore in Jinping, it contain 0.634% nickel, 0.329% copper, 0.047% cobalt, 30.18% SiO2, and 19.72% MgO. The rude ore contain amount of gangue minerals such as chlorite, mica, quartz, feldspar, which are easily slimed and have undesirable effect on flotation. In order to decrease such negative effect, this article investigated a method by “desliming-flotation” test, flotation test. Finally find that direct flotation is a promising method when utilizing carboxymethyl cellulose and sodium silicate as combinatorial depressants. And obtained the grade of bulk concentrate is 2.96% with recovery 60.82%, the recovery increased 2.43% compare with “desliming-flotation” test.
Numerical Simulation Optimization Study on Adjusting Well Pattern and Productive Series in Xingqi Area
Authors: Yin Dai Yin , Ying Bo , Zhou Wei , Zhang Cheng Li
Published: December 2012

In order to optimize space of tertiary infill wells and tertiary recovery wells, this paper applies numerical simulation method to study Xingqi Area in Daqing oil field. According to serious lateral and vertical heterogeneity and different control degree of water flooding in different parts of reservoir, 3 development schemes are designed. Numerical simulation results show that Scheme 2 is the best, whose well pattern consists of tertiary infill wells and tertiary recovery wells. When water cut is 98%, the ultimate recovery reaches 58.66%, which is 10.74% higher than the ultimate recovery of old well pattern. The result possesses great theoretical guidance for the same kinds of reservoirs.
Mathematical Model for the Economical Terminal Water Cut of Oil Well
Authors: Zhang Ji Cheng , Qi Gui Xue , Lan Jin Yu
Published: December 2012

For an oil well, when its water cut rises to a certain high point, the economical input gets equal to the economical output, at this time, this oil well produces nothing economically. If the water cut exceeds this point, then this oil well produces a deficit. This point is the so-called economical terminal water cut. Based on the theory of break even analysis, this paper determined the components of the cost of an oil well, analyzed the factors affecting the economical terminal water cut of oil well and developed a mathematical model to predict the value of economical terminal water cut.
Demulsification Performance of Hyper-Branched Dendrimer in ASP Flooding
Authors: Hou Zhi Feng , Gao Qing He , Wang Yi Can
Published: December 2012

Owing to the double actions by ternary liquid of ASP flooding and natural emulsifier in oil, the recovery liquid emulsified seriously as well as oil content in water rose after oil-water separation. Demulsification on recovery water in ASP flooding has been discussed via the modified terminal groups of hyperbranched tree macromolecules dendrimers polyamidoamine (PAMAM). Laboratory tests showed that PAE01 demulsifier had good demulsification efficiency. When demulsifier dosage was 120mg/L, sedimentation time was 90min, temperature was 45°C, oil content in water dropped from initial 5000mg/L to 197mg/L after demulsification, the deoiling rate was 96.1%. When initial oil content was 1500mg/L, oil content in water dropped to 215mg/L, the deoiling rate was 85.7%.
The Application on Q Value Inversion with the Direct Wave of VSP in ShengLi Oilfield
Authors: Li Gui Hua , Feng Jian Guo , Lin Nian Tian , Zhang Wen Bo
Published: December 2012

The earth filtering is inevitably in seismic wave propagation and the parameters to represent earth filter intensity is the absorption coefficient and the Q value. Using zero-offset vsp's down-going direct wave to estimated Q value is considered the most reliable way to extract stratigraphic quality factor Q value. We used Ken 71 well zero-offset VSP down-going direct wave with the centroid frequency shift method to estimate layer Q value. First, by processing the zero-offset VSP data, we separated down-going-direct wave and up-going wave. Then, we analysis and calculated the layer-velocity and layer Q value using down-going wave. At last, we made the bridge comparison chart by the up-going-wave processed. The bridge comparison chart compared with the layer-velocity and layer-Q value, results show that the corresponding relations are very good.
The Contrast Experimental Study of Displacing Coalbed Methane by Injecting Carbon Dioxide or Nitrogen
Authors: Tu Yi , Xie Chuan Li , Li Rui Min , Xie Shui Xiang
Published: December 2012

In accordance to Coalbed Methane(CBM) low productivity and environment problem in China, the experiments of displacing CBM by injecting carbon dioxide and nitrogen were researched respectively. The adsoption/desorption disciplines of Carbon Dioxide(CO2), Methane(CH4) and Nitrogen(N2) in coalbed were studied with experiment; the mechanism of CBM displacing by CO2 and N2 injection and enhancing recovery were also researched. The results show that gases with higher critical temperature have stronger adsorption under the same pressure and desorption lag occurs during desorption process. Under the same volume and pressure condition, CO2 has stronger adsorption ability ,thus enhancing the CH4 productivity in the pore surface of coalbed; N2 mainly enters into macro-pore and decrease the pressure of CH4 in the constant pressure condition, the effect of methane adsorption decreases, then CH4 is displaced. With the injection flow of CO2 increasing, the productivity is enhanced correspondingly. However, the productivity could not be enhanced anymore after a certain amount of gas injection
Asphaltene Deposition Forecasting Methods
Authors: Zhang Yan Xing , Li Xiang Fang , Li Jia
Published: December 2012

Asphaltene deposition problems occurred in many oil fields in worldwide, which maybe block up wellbore, damage the permeability of reservoir and decline oil productivity. There are many factors to result asphalthene deposition problems, which contain crude component, pressure, temperature and so on. However, it cannot prevent asphaltene deposition problems completely by keeping formation pressure higher than bubble pressure based on the research. Studying the deposition affecting factors, determining the deposition occurring conditions and depth are the basis to resolve the problems. This paper presents the key factor of affecting asphaltene deposition, and based on near infrared measurement, shows the asphaltene deposition envolope curve to forecast the pressure, temperature and depth in tube when the asphaltene deposition happened. The paper also provides methods to calculate the lowest production rate to carry the asphaltene solids to surface and forecast the deposition depth.
Molecular Dynamics Investigation on the Adsorption of Coalbed Methane Utilizing Carbon Nanotubes under the Condition of Liquid Water
Authors: Zhang Wan Song , Shao Chang Jin , Yang Zhen Qing , Zhou Jing
Published: December 2012

The carbon nanotubes(CNTs) was described according to condensed-phase optimized molecular potentials and arranged to represent coal structures, while interaction of CNTs with gas components of the system involves the Van der Waals force. Thus, we are able to study the interaction ability between coal and gas in different cases through the binding energy calculated by molecular dynamic method. We find that when there was not liquid water, the adsorption capacity of coal bed methane gases on the surface of CNTs, in the order of magnitude, was CO2>CH4>N2, and when there existed liquid water, the order of the adsorption capacity of gases changed into the order of N2>CH4>CO2>H2O. When there existed liquid water, the surface of CNTs may first absorb a very thin layer of methane molecules, and then a layer of water group, forming a layer of water film or water drops, providing large quantity of adsorption potential for the residual gases.
The Feasibility Experimental Study of Pumping and Shunting Pump under Pressure in Oilfield Water Injection Station
Authors: Xiao Bing , Cai Chang Xin
Published: December 2012

In order to simplify the operation process of water injection station and improve the utilization rate of water injection. We carried out the experiment of pumping under pressure and shunting pump when installed the rotor frequency control devices. The results shows that when the start pressure ranges from 0MPa to 15MPa, the surge current of power system keeps below the maximum allowed surge current so that the water injection pump runs smoothly and the instruments and devices are in good condition. And so does the system when the pressure changes from 0MPa to 16MPa in the shunting pump under pressure experiment. By making use of the rotor frequency control devices, the station reduces the labor intensity and simplifies the operation. Besides, the utilization rate of water injection is improved.
Research on Data Automotive Oscilloscope System Based on μC/OS-II of the LPC2132
Authors: Chen Yong Gang , Su Wei Jia
Published: December 2012

This paper describes particularly the design and research of an ultra-low-power data acquisition system. It uses LPC2132 as micro controller along with LCD display module and the data communication module, and uses the embedded operating system μC / OS-II to manage the communication and switching between tasks. This system realizes the function of real-time acquisition and display in analog signal and digital signal, and if necessary, the data will be sent to the host computer. The system runs stable, low power consumption and easy to carry.
Research on Data Fitting for Air Circulation Amount of Closed Underground Refuge Systems
Authors: Piao Ming Bo , Wang Zhen Fu , Wang Li Juan
Published: December 2012

The life support system is the important component of the refuge system, and the air circulation amount is an important parameter of the life support system. So far, the correlation theoretical model between the air circulation amount and the diameter and the rotation speed of the fan impeller has not been established yet, hence the theoretical support of the selections of the diameter and the rotation speed of the fan impeller for given air circulation amount can not be obtained. Therefore, the air circulation amounts with various diameters and various rotation speeds of the fan impeller are simulated by Fluent based on the blade style of an actual fan impeller, and TableCurve 3D is applied for the data fitting of simulation result in 3D surface, the data calculated by the fitting equations coincide with the simulation result. Thus, the fitting formula presented by the paper could provide the theoretical basis for the selections of the diameter and the rotation speed of the fan impeller with the variation of the air circulation amount.
Research of Mine Drainage Automatic Control System Based on PLC
Authors: Ren Lan Zhu , Zhang Xin , Zhang Ying , Liu Li
Published: December 2012

According to the development of mine automation requirements, Siemens S7-300 PLC is adopted in order to do the research of mine drainage automatic control system in this paper. Combined with frequency control technology, the system can schedule the pumps reasonably by monitoring water level and pressure signals. With failure alarm, group network communication and other functions, it’s profitable to achieve the whole mine automatic control and the economic operation of the entire system.
Creative Design of High Pressure Sealing Structure
Authors: Liu Xu Hui , Yao X.Y. , Liao H.D. , Li F. , Liu T.Y.
Published: December 2012

The reactor is the best structure for the chemical reaction on high pressure. The paper introduces creative design of a type high pressure sealing structure, and validates the feasibility from the mechanical aspect. The stress distribution and deformation are investigated by the finite element analysis method, which provides the design proof for the high pressure sealing structure.
Research on Four Crawler Dual-Arm Walking Mechanism of Rescue Vehicle
Authors: Song Xi Liang , Wang Jian Liang , Xu Wen Xin , Meng Jun , Xie Miao
Published: December 2012

Through design and research of four crawler dual-arm walking mechanism of rescue vehicle, this paper has analyzed the obstacle navigation theory, ensure the center of mass in every working state and draw a clear relationship between working condition and design parameters of four crawler dual-arm walking mechanism’s crawler. By doing research on kinetics of forward and reverse climbing over obstacle of crawler walking mechanism, designing the four crawler dual-arm walking mechanism, and then fixing parameters of the arms, the problem of climbing over obstacles underground has been solved well. Finally, the three - dimensional diagram of its elevation and swing angle relationship has been simulated using MATLAB software.
Thermal Load Analysis of a Brake Disc for a 220t Mining Dump Truck
Authors: Li Xiao Fei , Ni Wen Bo , Wang Xue Mei
Published: December 2012

Analyzing thermal load of friction pair of the disc brakes was not only an indispensable part but also a key theoretical basis for choosing materials of friction pair. In this paper, a brake disc of a mining dump truck with 220t loads was researched. In accordance with the brake test requirements of ISO3450-1996 standard, the finite element model was built using ANSYS software and then the transient simulation analysis of the temperature field for the brake disc was conducted. Finally the temperature distribution and its variation of the brake disc were analyzed in detail based on the simulation results.
The Weight Reduction Optimization of Jaw Crusher about Moving Jaw Based on Parametric Finite Element Analysis
Authors: Yang Chun Lan , Huang Da Ming , Xiong Ji Fen , Liu Xiao Hui
Published: December 2012

This paper aims at the problems of traditional compound pendulum jaw crusher including unreasonable structure design, heavy weight, low utilization of material and high cost, chooses moving jaw which is the key part of motion mechanism as the optimal design subject, uses finite element method, through statics analysis, obtains stress and displacement distribution of moving jaw that is under the action of maximum fracture force, realizes weak link and surplus part of primary structure. Based on the above-mentioned study, this article uses minimum weight of moving jaw as objective function, combines with structure characteristic of crusher, uses the ANSYS Parametric Design Language (APDL) to establish parameterization model, and combines with the optimal design module OPT, works out the minimum weight of moving jaw under the conditions of meeting intensity and stiffness. The result indicates that moving jaw is less than the original one by 27%, which saves material, reduces cost and weakens additional dynamic load that caused by inertial force of work mechanism, improves dynamics of mechanism to a cert extent, reduces the vibration of mechanism and the wear of part, and extends product service life.
Design of a Teaching Robot with Three Degrees of Freedom
Authors: Huang You Jun , Li Ze Lun , Huang Zhi Cheng
Published: December 2012

A teaching robot with three degree of freedom is designed. The three degrees of freedom are: waist rotation, lifting and stretching of the arm and opening and closing of the gripper. The designs of the main components are: a mobile chassis, parallel rails, horizontal rails and manipulator. The teaching robot designed has the features of low cost, easy to regulation, good repeatability and it has good promotion and application prospects in the field of teaching.
The Study of Fuzzy Clustering Analysis in the Determination of Assembly Process for Hull Block Module
Authors: Li Bin Cheng , Liu Ying
Published: December 2012

The automatic design of hull block assembly process is a difficult point in the study of CAPP assembly, which will influence the construction period and quality in shipbuilding negatively. This paper presents a new design of determination system of assembly units for block module assembly. Thus, based on fuzzy clustering analysis, the assembly model is built and the method to analyze the partition of assembly units is given out. The result shows that the system is reasonable and feasible, which will be significant for the production of ship module.
Stuck-Point Calculation for Exploration Core Drilling with Application of Full-Hydraulic Drill Rig
Authors: Wang Tao
Published: December 2012

Stuck-point calculation (SPC) is an important method to determine the stuck position of the drill string. It is of practical significance to explore and promote the SPC application in the field of mineral exploration. While Hooke's law is the foundation for the mathematical modeling, drill site conditions such as ground formation, borehole design and drilling process will be defining the factors and parameters in the formula. In recent years, the use of advanced full-hydraulic core drills provides a convenient means of on-site operation for stuck-point calculation. In this paper, the experimental operation at a deep-hole complex-formation drilling project in Yunnan Province, Southwest China, verifies that the SPC method is effective and conductive for mineral exploration core drilling activities.
Finite Element Modal Analyses of the WK-10B Excavator Stick
Authors: Su Meng , Liu Chun Ting , Zhang Wan Shan
Published: December 2012

To analysis the fracture mechanism and breaking location of the stick. By using ANSYS software to establish the model of excavator stick, and focus on analyzing the force changes of excavator stick in largest excavating force. By the modal analysis and transient dynamic analysis, stick stress and deformation distribution are obtained, further poses that reasonable to add the ribs, appropriate to strengthen cover thickness and the welding process of the stick will help prevent cracks. The results provide a reliable theoretical basis to improve the life of stick.
Design and Dynamic Analysis of a Carrier Blot Based on ADAMS
Authors: Ma Ying
Published: December 2012

At the present situation of unbalanced proportion on aiming at the coal roadway mining, and bolting support at a slower speed. Puts forward EBZ-160 type roadheader airborne anchor design idea and principle of the rig. Establishing virtual prototype take advantage of the parametric design software of Pro/ENGINEER, and used Mechanism/Pro interface software put the 3D model import to ADAMS, to anchor rig for dynamics simulation. The simulation results said the machine structural design is reasonable, can satisfy the requirements of operation.
Study on Coordinated Control Theory of Shield Thrust Hydraulic System
Authors: Feng Huan Huan , Chen Kui , Wu Xiang Dong , Li Feng Yuan , Wang Zhu Feng
Published: December 2012

In order to improve the dynamic coordinated control performance of shield thrust hydraulic cylinder during the shield construction process, we used the shield electro-hydraulic control synthetic experimental platform as research object. The simulation models of thrust system and external loading were built in AMESim. The result of PID closed-loop simulation indicated that thrust system can enable the compound control of thrust pressure and velocity by using the compound control technique of pressure and flow. In view of the complex and varied external load condition of shield thrust system, we simulated the fuzzy and fuzzy-PID control strategy of thrust system in passive automatic adjustment mode, based on the Joint Modeling and Simulation Environment (JMASE) of AMESim and Matlab/Simulink. The multi-external loads of thrust system mainly contained unequal-fixed load, equal-variable load and unequal-variable load. Finally, a coordinated control theory of shield thrust system was put forward. Such theory could provide some theoretical guidance for the design of shield machine and control of shield construction.
Research on the Simulation and Experiment of Semi-Active Suspension
Authors: Chen Yi Jie , Liu Jin Jing , Zheng Guan Hui , Zhang Ya Feng , Wang Ya Jun
Published: December 2012

A research method of mathematical model of the semi-active suspension is presented. First, the equivalent flow and suspension sketch map are given, after that the damping and elastic characteristics are deduced by using equations of throttle orifice and state of real gas. The semi-active suspension could regulate damping force through changing control valve electric current,and it is verified that the rate of change of damping force could achieve 53%. The rules of structure parameters of valve influence on the export force of semi-active suspension are studied. The analytical equations and conclusions can offer reference to design the intelligent suspension.
Decoupling Control of Secondary Regulation Loading System
Authors: Jie Wang , Hui Wang , Meng Shi
Published: December 2012

The simulation loading system with secondary regulation contains hydraulic coupling and mechanical coupling. This study analyzed the influence on the performance of the system caused by coupling disturbances. Control performance under coupling disturbances with PID control was simulated by MATLAB. With the increasing of the pressure fluctuations, fluctuations of torque control and speed control system all changed. The influence of torque control system is greater than speed control system. When the torque fluctuated, the drive speed appeared large fluctuation error and the error was direct ratio to the torque fluctuation. But the torque system is immune to the speed fluctuation. In order to eliminate the influences, a decoupling controller has been designed. Control performances under the disturbance of hydraulic and mechanical coupling with decoupling controller and without decoupling controller were simulated. The results showed that, when added decoupling components, the system was decoupled, the negative influence of the coupling interferences to the system was reduced or eliminated, the control property was improved.
The Roadheader Rear Support System Modeling and Mechanical-Hydraulic Coupling System Co-Simulation Research
Authors: Zhao Li Juan , Zhao Xin
Published: December 2012

In order to estimate the stability of the roadheader rear support system, took the heavy cantilever roadheader of a coal company as the research object, rigid-flex coupled dynamic model of its rear support system was established based on Pro/E, ADAMS and ANSYS. The hydraulic control system model of rear support was researched in EASY5. These two models built the mechanical-hydraulic coupling system. Analysed the mechanical dynamic simulation results and verified the reliability of hydraulic system when the co-simulation of rear support was made.
Electrode Feeding Speed Control and Experiment Research of ESR Furnace Based on S Style Control Curve
Authors: Wang Chang Zhou , Song Jin Chun
Published: December 2012

The electrode feeding mechanism and the feeding speed control system of the electroslag remelting furnace are studied. The electrode feeding mechanism is designed based on the electro-hydraulic proportional control technique, and the mechanism’s three-dimensional model is established. The electrode feeding mechanism’s electro-hydraulic proportional control system is simulated. The basic feeding speed model and the error-correction feeding speed model are established; and the S style speed control curve of the electrode feeding system is designed. Experiments were carried out; the system control curves and the experimental production dissection results were obtained. It was found that, the electrode feeding system and the feeding speed control system studied in this paper met the craft procedure and technique requirements of large electroslag remelting furnace, and the method’s validity was verified.
A Control Method Research of Parallel Mechanisms
Authors: Chen Heng , Ni Yan Bing
Published: December 2012

This paper deals with a control method research and trajectory planning of parallel mechanisms. Control system scheme which is based on PC and motion controller has high openness, high degree of modularization and support for non-linear mapping relationship between operating space and joint space of parallel mechanisms with high flexibility and low cost. PC and NI motion controller and LabVIEW constituted hardware core and software platform of control system, respectively. Hardware technology of control system contained hardware selection, control circuit design and interface technology; software technology of control system developed application programs layer, core control layer and drive functions layer to realize core control functions of finding home, single-step or continuous movement and micro adjustment, which was based on hardware principle. Trajectory has been planned for a typical high speed parallel robot.