bluuebunny/crossref_metadata_2025 huggingface dataset:
Numerical Studies of Cutting Water Saturated Sand by Discrete Element Method
Authors: Qin Shao Hua , Xie Li Quan , Hong Guo Jun , Wang Jie
Published: December 2012

The discrete element method (DEM) has been recognized as an effective tool to simulate soil–tool interactions. In this study, a saturated sand cutting model is developed using a commercial DEM software, Particle Flow Code in Two Dimension (PFC 2D). In the model, soil are defined as particles with the basic PFC 2D model, full coupling with a deformable fluid. The mechanical interactions between particles and also between particles and the walls are modeled by sprints, dash-pots and friction sliders. The properties of the material and interactions (Poisson’s ratio, shear modulus and density, coefficients of restitution, rolling and static friction) relate to the particle properties and not to the bulk properties. Such quantitative and qualitative models are essential for improving the design, selection and use of water saturated sand cutting implements, in different field sand under different conditions. This paper describes a numerical experimental investigation of the failure characteristics of two-dimensional water saturated sand cutting. Comprehensive simulated tests were carried out on sandy loam using a box apparatus and two model plane blades of rake angles 30º, 60º and two angles of friction 32º,42º, respectively. Besides, there are two extreme densities of the sand, compacted and loose. These factors should provide a basis for the reliable prediction of the failure type.
The Research of Civil Engineering Excellent Engineer Teaching Plan Formulation
Authors: Yang Wei Jun , Jiang Peng Xiao
Published: December 2012

In the light of civil engineering excellent engineer teaching plan, this paper proposed how to dealing with the relationship of impart knowledge and cultivating ability in the teaching plan formulation, discussed that making teaching plan should not only attach great importance to all-round education, but also make specialized education blend in all-round education; And analyzed example. It has a certain important significance to further explore the training mode of excellence applied civil engineering professionals in the undergraduate course colleges and universities.
Experimental Study on Compaction and Strength Characteristic of Wetland Fine Grained Soil
Authors: Yang Hong Xia
Published: December 2012

Through indoor the compaction test and unconfined compressive strength of compacted soil samples and CBR strength test, analyzes compaction characteristics of wetland fine grained soil and the change rule of compacted strength with compaction work and moisture content.The results show that under the same compaction work effect, when the soil moisture content is less than optimum moisture content,along with the increase of moisture content, dry density increases, when the soil moisture content is greater than the optimum moisture content, along with the increase of moisture content, dry density decreases and to a larger extent.When the compaction work is bigger, the soil dry density is bigger, the compaction strength is higher and the optimum moisture content is smaller.Strength decreases when under high moisture content condition, CBR value is relatively stable in the wet side of optimum moisture content.
Experiment Study on Bolts Foundation of Large-Jointed Rock Mass in Transmission Lines
Authors: Tong Rui Ming , Lu Xian Long , Zheng Wei Feng
Published: December 2012

Large-jointed rock mass is the main geological condition of transmission lines of Qingyuan Regions in Guangdong Province. The bolt foundations haven’t be studied and applied in this geological condition. Static load tests of 15 single-bolt foundations and 8 group-bolt foundations were carried out. Experiment study shows that the mechanical characteristics of bolt foundation are suitable for transmission lines in large-jointed rock mass. The design parameters of anchor bar in large-jointed rock mass are derived from the measured data:τa>2359kPa, τb>618kPa, τc>42kPa.
Study on the Granular Shear Strength Parameters of Dumping Site
Authors: Kong Xiang Yun , Wang Guang Jin , Zhou Xiao Chao
Published: December 2012

Apparent particle size grading is the important characteristic of super-high bench dumping site, and the critical factors with the impact of its stability and disaster prevention are the fragmentation distribution and shear strength parameters of granular. With the copper mine dumping site which had the feature of apparent particle size grading, the thesis carried out the study of on-site particle size investigation and indoor laboratory. The particle-size distribution law with the changing of dumping-site height was analyzed and quantitative relationship between the fragmentation distribution and shear strength parameters of granular was discussed. The research results indicated that coarse-grain contents and maximum grain size were increased significantly according to the decreasing of dumping-site height, which showed that the dumping-site had the feature of apparent particle size grading. The coarse particle content in the grain size composition and internal friction angle φ of shear strength parameters increased with the obvious increment of the distribution value B. The relationship between distribution value B and the internal friction angle φ could be expressed by exponential function curve.
Soil Variable Analysis of Spiral Pile-Driven Process Simulation
Authors: Pang Hong Chen , Wang Yu Xing , Tang Yan Qin , Huang Han Dong
Published: December 2012

Pile driven-operations is an important means to control floods, anti-flood spiral pile is a kind of flood control equipment which is lightweight, high work efficiency and low labor intensity. It is important to research the soil variables to further clarify the mechanism of pile-soil interaction in driven process. Soil constitutive model was built as the SPH particles; pile-driven process was simulated by dynamics software. By tracing the SPH (Smoothed Particle Hydrodynamics) particles, contrasting and analyzing the movement of soil particles at different times and depths because of friction, extrusion, and shear effect of pile were achieved. The mechanism of pile - soil interaction in the driven process was clarified by analyzing and comparing the simulation results, which make up the lack of theoretical analysis and experimental methods. It will provide useful suggestions on the design of spiral pile and reducing the secondary damage to dam.
Research on Uplift Static Load Test of Large-Diameter Steel Pipe Pile Based on Mechanics
Authors: Huo Kai Cheng , Qin Xu , Yue Huan Huan
Published: December 2012

Combined with the uplift static load test of large-diameter steel pipe pile in Xiangshan Port bridge of Ningbo, make analysis of Q-s curve and s-lgt curve, axial force distribution curve and unit shaft resistance, revealing the uplift characteristic of the steel pipe pile. The analyses show that the uplift steel pipe pile is pure friction pile, the uplift load is decreased downward through the axial force of pile body, the shaft resistance gradually plays from top to bottom and play completely in the upper soil. Moreover, it has used hyperbolic model to fit the measured Q-s curve by Matlab software, and the fitting precision is high. Then make the hyperbolic model non-dimensional, and attempt to predict ultimate bearing capacity using the maximum curvature point of the non-dimensional hyperbolic model, to get some mechanical characteristic.
Application of PML to Analysis of Dam-Reservoir-Foundation System with Cavitation Using Mixed Formulation
Authors: Leheman Pahaiti , Shiojiri Hiroo , Uno Kunihiko
Published: December 2012

Convolution PML is known to have excellent wave absorbing capability, and has been used combined with FDM and FEM. Most of them are splitting type formulation for explicit FEM or FDM. Here implicit non-splitting type convolution PML procedures consistent with mixed formulation FEM as well as displacement based FEM are developed. The resulting coefficient matrices for convolution PML are symmetric if corresponding coefficient matrices of FEM are symmetric. The developed method is applied to dam-reservoir-foundation systems including reservoir cavitation, and the validity of the method is demonstrated.
Research on Geological Characteristics and Deformation Law of Surrounding Rock of a Tunnel with Carbonaceous Schist in Northwest Hubei Province
Authors: Han Zhi Qiang , Liu Jian , Bian Kang , Chen Quan
Published: December 2012

Northwest Hubei province is located in Mount Wudang metamorphic zone, where the geological conditions are very complex. The carbonaceous schist is relatively rare in this area, however, compared with other schists, it has some quite special characteristics. This paper focuses on lithologic features, physical and mechanical characteristics of carbonaceous schist, and Huashigou tunnel is researched as the engineering background. Analysis of carbonaceous schist shows that it has typical rheological, anisotropic and water-sensitive properties. Through a large number of monitoring measurement data analysis, deformation law of carbonaceous schist are summarized.
Influence of Water Content on the Strength of Silt Soil in Yellow River Alluvial Plain
Authors: Yi Xiao Ming , Wang Song Gen , Liu Zhen Qing , Xu Gang
Published: December 2012

Hydrophilic characteristic of silt soil in Yellow River alluvial plain was studied in order to reveal the water content changes of silt. Then strength tests were used to research how engineering parameters such as elastic modulus, cohesion and friction angle change at different water content. The results show that high permeability coefficient and strong capillary are main factors to increase the water content, and the influence of capillary rising is greater than that of rainfall infiltration. The strength characteristic of silt soil is similar to the character of non-cohesive soil in low water content and that of clay in high water content. If the water content is greater than optimum water content, the elastic modulus and cohesion of silt shall decay obviously. Friction angle decreases dramatically as well, when the soil is saturated.
Nonlinear Analysis on Stainless Steel Reinforced Concrete Columns under Low-Cyclic Load
Authors: Zhang Guo Xue , Wang Chang Wei , Huang Jia Wei
Published: December 2012

In order to study the elastic-plastic mechanics properties of the stainless steel reinforced concrete columns under low-cyclic load, the engineering open-source earthquake simulation system OpenSees is used to carry out the numerical simulation. The comparison between the computed results and the pseudo-static test results shows that the OpenSees may stimulate the mechanical properties of the stainless steel reinforced concrete columns by using the fiber element model, both of the skeleton curves and hysteretic curves are well agreement with the tests results.
Shear Strength of Reinforced Concrete Beams after Fire
Authors: Xiang Kai , Wang Guo Hui , Liu Hua Xin
Published: December 2012

In order to research the calculation method of shear capacity for fire-damaged reinforced concrete (RC) beams, the reason of drop of shear capacity was analyzed from material properties and transfer mechanisms of RC beams after fire. Formulas of shear capacity were suggested for fire-damaged RC beams. Based on test analysis, the values of reduction factors of shear capacity were proposed under concentrated load. The results show that suggested calculation method is capable of predicting shear capacity of fire-damaged RC beams exactly. The values of reduction factors of shear capacity need further experiments research.
Analysis of Separation and Dislocation Characteristics of Layered Roof in the Mined-Out Areas
Authors: Wang Shu Ren , Wang Zhong Qiu
Published: December 2012

The computational model based on the shallow mined-out areas was built by using FLAC3D, and the separation and dislocation characteristics of the layered roof in the mined-out areas were analyzed under different conditions. The results showed that the maximum value of the layered roof separation increased with the increase of the mining width, and that value decreased with the increase of lateral pressure and the cohesion between layers. The separation curves of the layered roof showed the shape variation from the symmetry flat arch to the asymmetric steeple arch and then to the linear form, the maximum separation value of the layered roof exhibited a three-stage tendency of a gradual increase, a steep reduction and a slight change, and the maximum dislocation value of the layered roof presented a two-stage tendency of firstly slow growth and then rapid growth with the increase of the dip angle of coal seam.
Damage Criteria of Steel Frame Structures Based on Damage Constitutive Model for Steel
Authors: Lei Bi , Yang Lv , Min Wu
Published: December 2012

The damage criteria of steel frame structure for fiber level, member level and story level are proposed. The fiber level damage criteria is directly defined by the developed steel damage model, the damage criteria of steel member is averaged through all the fibers of the member, and the story level, the damage criteria is defined as the weighted average value of the members, which the weighting factor is defined as the first several relative frequencies increase of residual structure after the evaluated member was demolished. As a numerical example, the damage process of a 9-story benchmark steel frame is analyzed through IDA (Incremental Dynamic Analysis) method in term of structural global damage index, and the damage distribution of each story is proposed as well.
Ultimate Bearing Capacity Test of Retard-Bonded Prestressed Concrete T-Beams
Authors: Cao Guo Hui , Hu Jia Xing , Xiao Ming , Zhang Kai
Published: December 2012

Through the ultimate bearing capacity test of 2 prestressed concrete T-beams, the cracking load, the failure load, the control section stress, and the crack and deformation were tested respectively. The mechanical behavior differences of retard-bonded prestressed concrete between T-beam and ordinary prestressed concrete T-beam were contrasted. The test results show that: the change rule of the measured value of deflection and strain is basically the same between the retard-bonded prestressed concrete T-beam and the ordinary prestressed concrete T-beam. Compared with the measured value of the ordinary prestressed concrete T-beam, the cracking load of retard-bonded prestressed concrete T-beams is 10% greater, the failure load of retard-bonded prestressed concrete T-beam is 3% greater. when loading is 80kN, the midspan deflection of retard-bonded prestressed concrete T-beam is 1% greater, when loading is 229kN, the midspan deflection of retard-bonded prestressed concrete T-beam is 2% greater, when loading is 225kN, the crack width of retard-bonded prestressed concrete T-beam is 2% smaller. The average crack spacing of retard-bonded prestressed concrete T-beam is 6% smaller. The retard-bonded prestressed concrete T-beam have better mechanical behavior.
Study on Characteristics of Wind Loading on Open Ended Cantilevered Roof under Typhoon
Authors: Yin Zhi Xiang , Zhang Yu
Published: December 2012

Open ended cantilevered roof is different from enclosed roof, because its change of wind pressure distribution is complex, and the wind directions have great influence on it. Up to now, for the characteristics of the structure are very complicated, there is no appropriate wind load model can be used in design, especially under typhoon, a specific wind field. So it is necessary to study the characteristics of wind load on open ended cantilevered roofs of typhoon. Using FLUENT and Computational Fluid Dynamics technology, based on the conventional, Tianpu’s and Shiyuan’s turbulence intensity of the typhoon scenario, a numerical simulation of wind flow around a large-span cantilevered roof was carried out. Analyzed different wind angles of the wind pressure distribution regularities on large-span cantilevered roof. The paper determined the distribution of the surface wind pressure coefficient for the cantilevered roofs, as well as the wind-sensitive parts of structures.
A Moment-Shear Story Model for the Design of Steel Frames with Semi-Rigid Connections
Authors: Hu Xi Bing , Yang Yu Wei , He Guo Jing , Fan Yun Lei , Zhou Peng
Published: December 2012

A moment-shear story model using the static condensation method is proposed for the steel frame with semi-rigid connections. Based on the superposition principle under small deformation, the story horizontal deflection can be divided into three parts, due to the action of story shears, the top story moment of column and the connection rotation of bottom story column, respectively. The formulas are derived for its lateral stiffness, horizontal deflection and height ratio of inflection point of column, taking into account the effect of semi-rigid connection. Numerical results indicate that this story model is reliable and can be used for preliminary design of this type of structures.
Nonlinear Analysis on Slabs Strengthened by Carbon Fiber Sheet Bonded with Inorganic Adhesive after Fire
Authors: Wan Fu Xiong , Zheng Wen Zhong
Published: December 2012

To understand all-round mechanical performance of RC slabs strengthened by Carbon Fiber Sheet (CFS) bonding with the inorganic adhesive after fire, Conjugate Method is used to analyze the whole mechanical process from loading to failure. On the base of plane section assumption, Moment- Curvature curves are obtained by iterative computation program. Load-displacement curves of slabs at mid-span after fire are obtained by Conjugate Method, and furthermore, curve of moment-sheet stress relationship is obtained, stress of CFS is analyzed. The test and analysis results show that, for RC slabs strengthened by CFS bonded with an inorganic adhesive, maximum stress of composite sheet decreases with small amplitude compared with that at room temperature, and the strength of the sheet can be utilized to a great extent, even if temperature (about 200°C~300°C) an inorganic adhesive experienced outclasses softening temperatures of ordinary organic epoxy adhesives. Slabs strengthened by CFS bonded with inorganic adhesive perform good fire behavior.
Drip Injection Tests on Solidification of Tianluoshan Relic Soils by Silicone
Authors: Chai Xin Jun , Chen Pei Hang , He Chun Feng , Gao Yan Sheng
Published: December 2012

Tianluoshan relic sites is a typical earthen sites located at moisture circumstances. The potential application of silicone for strengthening Tianluoshan relic soils were evaluated by a series of laboratory drip injection tests. The main considered influence factors include: dry density, initial water content and degree of saturation. The results show that the drip injection effect of silicone for Tianluoshan relic soils greatly related with dry density and initial water content, the practical application guidance are also presented in the paper.
Study on Dynamic Failure Behaviors of Steel Double-Layer Grids(36×36m) Supported by Tridimensional Truss Columns Used in a Gymnasium under Disaster Earthquake Action
Authors: Zhang Yan Mei , Li Hai Wang , Liu Jing
Published: December 2012

The study was carried out under El-Centro wave with SAP2000, and the appraisal results on their anti-failure performances were presented under strong earthquake action based on theplastic-hinge theory. In the analyses, the geometric and material nonlinear effects were considered simultaneously. The plastic development level of the rods, the deformed shape and the failure type and the ductility were estimated by plastic hinge principle. The results show that the failure model of the structure under the earthquake wave action is the complicated combination of strength failure and elasto-plastic dynamic local buckling in deferent areas; When the structure reached its failure critical limit, only 14% of the rods enter into their plastic stage and the development of the plastic hinges is not sufficient; Its critical failure peak acceleration of EL earthquake wave when applied in the combination of three directions is 969gal, which is equivalent 2.425 times to the official seismic fortification level of 8 degree (major earthquake, 0.4g) and it can be served as earthquake victims shelter in the area of 8 degree seismic fortification; Its displacement ductility coefficient is 2.88, which shows the structure owns some energy dissipation capacity.
The Bearing Capacity of One-Shear Nail Joints in Cement-Splinter Boards
Authors: Vavrusova Kristyna , Lokaj Antonín , Žídek Libor
Published: December 2012

The aim of this article is in description of behavior and bearing capacity of one-shear nail joints in joints of cement-splinter boards with middle solid wood element on the base of destructive laboratory testing according to valid European standards [1]. The second part of this paper describes typical damage of these joints and comparison of these results with bearing capacity of the same way arranged and loaded joints, where however instead of cement-splinter board solid wood boards were used.
A New Measure to Reduce the Potential for Progressive Collapse of Steel Frame Structure
Authors: Liu Chuan Qing , Mei Zuo Yun , Gao Xue Guang
Published: December 2012

In order to improve the capacity of resistance to progressive collapse for steel frame structures, a new measure, which uses bracing systems to help damaged frame to bridge across the local damage caused by abnormal loads, is presented in this study. The dynamic progressive collapse analysis is carried out to investigate the effect of resistance to progressive collapse in two different cases of column removal. Analytical results show that bracing systems on the top of steel frame structure have obvious effects on collapse prevention. Comparison with the unbraced steel frame structure, fixing bracing system could decrease the vertical displacement of the node corresponding to the top of the removed columns, and reduce the moment peak value at the end section of beams. And after column removal, plastic hinges come into being in the unbraced steel frame, on the other hand, there are no plastic hinges formed in the steel frame with bracing system.
Experimental Study on RC Beams Strengthened by a Novel Large Diameter Pre-stressed Stainless Steel Wire Mesh – Mortar Structure
Authors: Zhang Meng Jie , He Ming Hua , Xin Ke Gui , Zhang Tian Shen , Ma Yuan
Published: December 2012

The pre-stressed stainless steel wire mesh (SSWM) –mortar (M) is a pre-stressed laminate structure for structural strengthening and rehabilitation. Pre-stressing the stainless steel wire mesh is the key technology for engineering practice. A jogged anchor is proposed for anchoring large diameter SSWM conveniently. The flexural performances of 5 damaged RC beams strengthened by pre-stressed SSWM-M and one referential RC beam were tested. The experimental results indicates that the large diameter pre-stressed SSWM-M has a better performance in controlling the crack growth, restoring the flexural capacity and stiffness than the small diameter pre-stressed SSWM-M.
Experimental Study on Shear Capacity of Prestressed SFRC Beams
Authors: Jin Li Bing , Chen De Cai , Qi Ji Peng
Published: December 2012

In order to study the shear capacity enhancement effect of prestressed technology to steel fiber reinforced concrete, the practical formulas were proposed for evaluating the shear-strength of unbonded prestressed steel-fiber reinforced concrete beams (UPSFRCB) through the test and study of shear capacity of UPSFRCB with simply supported ends. Various factors affecting the shear strength of UPSFRCB, such as steel fiber, prestress and shear-span to depth ratio were analyzed. The result is of importance to the popularization and application of prestressed steel-fiber reinforced concrete.
The Implosion Performance Analysis of the Tube Truss Roof Based on Measured Defects
Authors: Gao Hong , Lv Guo , Bai Zheng Rong
Published: December 2012

In order to analyze the mechanical properties of the steel truss roof burst in the case of defective within, the use of non-linear display dynamic finite element analysis software ANSYS / LS-DYNA to study the different effects of different random defect structure. The measured defect data is obtained by a construction tube truss roof structure .To accord to the random sampling method, defects randomly distributed and the parametric statistical information is to establish. Defect structure antiknock performance is derived, considering the tube truss structure roofing layer, and unconsidering the two simulation models for pipe truss structure roofing layer, and taking into account the rod defects affect the dynamic characteristics of tube truss structure to explosivesposition, explosives equivalent parameters by analyzing and comparing the different parameters of the explosion of the power of the tube truss structure response. Roof layer, the location of the explosion, explosives equivalent with tube truss structure antiknock performance relationship and the weak position of the structure is determined to ensure that the building security to provide a theoretical basis . The results show that the tube truss structure system when the explosion shock wave loads, its dynamic response is a very complex process, the role of the explosion shock wave loading, pipe truss the plastic development process and the structure of the internal location of the explosion, explosivesweight, defects, and consider whether the the roofing layer has relationship.
The Numerical Simulation Study of a Flocculation Reactor
Authors: Lai Yan Ping , Zhao Jian Hai
Published: December 2012

Three-dimensional flow field of flocculating reactor is simulated. Numerical results were applied to analyze and explain influence of flow field under different flocculation conditions. The results indicate that k, ε can reasonably explain flocculation effect, and meanwhile verify the better applicability as the CFD numerical simulation evaluation indexes of flocculation effect. The results can be extended to find an effective way to optimize the design and operation, to improve the efficiency of flocculation.
Estimation Method for Spatial Capacity of Sea Areas Reclamation
Authors: Zhang Ming Hui , Chen Chang Ping , Suo An Ning
Published: December 2012

This paper suggest 5m depth line is suitable depth for sea areas reclamation based on study of sea areas reclamation investing and established estimationmethods for spatial resource capacity of sea areas reclamation. Then Liaoning province in China was chose as a case to estimateitssea areas reclamation capacity. The result shown as follows: Depth of sea areas near the coastline in Liaoning province is smaller than 5m in most sea fields. Length of coast with under water slope angle less than 1°is 1988.77km and account for 52.25% coast of Liaoning province. The total areas of sea reclamation capacity is 211714.06hm2.Its distributes mainly in Dalian sea areas, Jinzhou sea areas and Yingkou sea areas with percentage of 47.19%，18.78% and 14.53%,respectively.
Photodegradation of Two Antibiotics Involved with Fe (III) and Marine Algae
Authors: Ge Li Yun , Huang Yong Gang , Gao De Xiang , Deng Huan Huan
Published: December 2012

The photochemical degradation of two antibiotics, enrofloxacin and ciprofloxacin hydrochloride, was preliminarily studied under irradiation with a high-pressure mercury lamp (HMPL) in this paper. The influence of initial concentration of antibiotics, Fe (Ⅲ) and platymonas subcordiformis on the degradation efficiency of antibiotics were investigated. The results suggested that in the presence of P. subcordiformis, the degradation efficiency of enrofloxacin and ciprofloxacin hydrochloride were 85.0% and 84.2% in aqueous solutions underwent photodegradation under HMPL irradiation, respectively. Moreover, the lower initial concentration of antibiotics improved photodegradation rate of antibiotics.
Research on Influencing Mechanism of Industrial Carbon Emissions in Hebei Province
Authors: Yu Wei Yang , Zhao Hui Ning
Published: December 2012

This paper calculates carbon emissions in Hebei Province based on energy consumption and carbon coefficients and adopts the index decomposition model to analyze the influence of value-added industries and carbon emissions per unit added value on carbon emissions.The results indicate that the increase of value-added industries in Hebei Province is the main factor affecting the growth of carbon emissions, but the decrease of carbon emissions per unit added value induces carbon emissions to a lesser reducing. The conclusions can offer the decision basis for reducing carbon emissions.
Study on Control Factors and Genetic Model of Karst in the Ordovician of Tahe Oilfield
Authors: Li Ying , Xu Shou Yu
Published: December 2012

Main production layers of Tahe oilfield are Ordovician carbonate karst reservoirs, but the control factors of this series of karst reservoirs remains unclear. Combining with drilling, seismic data etc., this paper analysis the control factors of karst from 3 aspects that fractures, paleogeomorphy and unconformity surface in this paper. Research shows that the main control factors of karst are fractures and their associated cracks, unconformity surface and karst landforms. Unconformity surface, karst landforms are the main control factors of karst in early Hercynian period. Fractures and their associated cracks are the important control factors of karst in middle Caledonian and early Hercynian period. On the basis, summarizes genetic model graph of karst.
Research on the Classification of Coupling Relationship among the Ecological Environment, Natural Disasters and Regional Poverty in Inner Mongolia Autonomous Region
Authors: Tuya Alateng , Jirigala Bu Ren , Yin Bao
Published: December 2012

This paper first built the evaluation index system for the eco-environmental vulnerability, natural disaster, and regional poverty in Inner Mongolia, and then adopted the principal component projection analysis to obtain vulnerability degree of eco-environment, risk degree of natural disaster and regional poverty degree. Then the classification for them was conducted, coupled with the analysis of their own characteristics. Moreover, the coupling analysis was utilized to carry out classification and research for the coupling relationship between them, aiming to provide scientific theoretical basis for the ecological protection and construction, the disaster prevention and mitigation as well as the poverty alleviation and development in Inner Mongolia.
The Inevitability Research on the Adjustment of Industrial Structure to Achieve Sustainable Development of the Resource-Based Cities
Authors: Chen Jun , Cai Fu Bin , Xiao Bi Yun
Published: December 2012

Generally speaking, after the rapid economic development in base of the rich resources, there will inevitably come with the economic downturn which caused by resource exhaustion in resource-based cities. It will be difficult to avoid the phenomenon of “urban decay with the depletion of mineral”, if corresponding countermeasures can not be made timely. In this thesis, we will analysis in-depth to find constraints on the sustainable development in these cities, and point out that we can achieve the sustainable development by the adjustment of industrial structure in these cities. Meanwhile, we will expound and prove the possibility to overcome these constraints from the internal and external of these cities. Finally, we come to the conclusion that it is an inevitable choice to achieve the sustainable development of resource-based cities by the adjustment of industrial structure.
Quantitative Study of Elements Migration during the Wall Rock Alteration Process for Gejiu Copper-Polymetallic Deposit inside Rock
Authors: Deng Xiao Hu , Chen Shou Yu , Liao Shi Li
Published: December 2012

With continuous consumption of proven resources, people have to turn to new resources or find new ways for prospecting. As to Yunnan Gejiu Tin and copper polymetallic deposit, deep ore prospecting may be the solution. The newly discovered copper-polymetallic deposit inside the rock of Tangzi’ao depression zone, which located in western part of Yunnan Gejiu east tin mine area, is a new type of deposit in deep ore prospecting. This kind of deposit produced in the alkali-rich, oxidizing environment, potash feldspathization is an important sign of prospecting, and a variety of metallic elements can be comprehensive utilization. It is special that potash feldspathization zone and epidotization zone alternating with each other; the phenomenon may caused by multi-period of hydrothermal fluids. By quantitative calculating the results of altered rocks and original rock samples, the author find out the migration laws of the constant elements and the main ore-forming elements and their associated elements, which provide a basis for prospecting in the future.
Vibration Control Based on Shift Mass of Propulsion Motor for Watercraft
Authors: Wu Hui , Sun Tiger
Published: December 2012

With the development of society, watercraft is used more and more widely. However, the stability and vibration control of watercraft have been the bottleneck of its development. In order to reduce investment cost and the accident risk, the work presents a set of design for the vibration control of propulsion motor TJDJ-1000 on watercraft. The efficiency and reliability of the proposed method are demonstrated by experimental results. Hope the work can effectively promote the rapid development of watercraft.
FLY System of Green Infrastructure for Coping with Climate Change
Authors: Choei Goeun , Bae Jeon Geun , Shin Sang Min , Park Heek Yung
Published: December 2012

This study aims to examine technical feasibility of the FLY system that was developed for control indoor temperature against change of outdoor temperature based on principles for green infrastructure. The FLY system is a control system that protects inner system from external disturbances by making transition layer. The CFD simulation was used for analyzing change of temperature at transition layer and indoor. It was analyzed that the FLY system can reduce variability of indoor temperature against uncertain change of outdoor temperature.
Comparison of Extraction Methods for Quantifying Extracellular Polymers of Marine Algae
Authors: Ge Li Yun , Huang Yong Gang , Gao De Xiang , Deng Huan Huan
Published: December 2012

Five extraction methods were used to extract extracellular polymers (EPS) from Platymonas subcordiformis. Results suggested that the extraction efficiencies of EPS decreased as followed: cation exchange resin (CER) > ultrasonic extraction> heating (80°C) > EDTA > centrifugation. CER method was the most effective in the EPS extraction from P. subcordiformis with the highest amount of EPS and the lowest cell lysis, while the ultrasonic extraction method was not suitable to extract EPS for its obvious cell lysis. In addition, heating (80 °C) was used to investigate EPS formation of P. subcordiformis. Results showed EPS amount increased at the increased incubation time when the nutrients were enough whereas the ratio of EPS components remained unchanged in the growing cycle.
Characterization of ZSM-5 during Conversion of Glucose to Levulinic Acid
Authors: Liu Ying , Lin Lu , Sui Xiao Yu , Zhuang Jun Ping , Pang Chun Sheng
Published: December 2012

The effects of catalyst amount on the yields of levulinic and hydroxymethyl furfural were investigated during conversion of glucose to levulinic acid catalyzed by ZSM-5. XRD and XPS were used to analyse the characteristics of ZSM-5 before reaction and after reaction. The results showed that: ZSM-5 exhibited good catalytic activity in the reaction of hydrolysis of glucose to produce levulinic acid. The characteristic peak of ZSM-5 molecular sieve did not change after reaction compared to that of before reaction. The relative crystallinity of ZSM-5 decreased after reaction, which caused the catalytic activity decline. The surface O, Si and Al content of ZSM-5 decreased greatly. The increase of element C was the main reason of inactivation of catalyst.
The Study on the Inhibiting Effect of Denitrifying Bacteria on Sulfate-Reducing Process
Authors: Li Yan , Zhang Xuan , Zhou Li Hui , Ren Jian Ke , Zhao Nan
Published: December 2012

The average concentration of H2S in Changqing oil Field is higher than 100mg/m3,which is much higher than the demand of “Operational Site Harm Factor Occupation Contact Limiting Value” (GBZ2-2002). Taking this factor into consideration, the experiment aimed at reducing H2S concentration in crude oil gatering and transferring systems by using the denitrifying bacteria. The experiment has two parts: First sulphat reduction process and then denitrification inhibit process. Therefore, two UASB reactors are used in a series to achieve these two processes. The first UASB reactor are mainly used to create SRB bacteria and H2S gas .After the first UASB reactor successfully starting, sodium nitrite are added in the second UASB to achieve denitrification inhibit process. The experiment showed that after the first UASB reactor start, the S2- can achieve 120mg/L and SO42- concentration is about 200 mg/L. So the Sulfate conversion rate can achieve 75%. Then, when the second UASB reactor started successfully, the S2- concentration sharply droped into 20 mg/L and SO42- concentration increased to 400mg/L, the sulphat reduction can achieve 83%. Also, advanced research showed that both SO42-concentration ratio and ORP value can contribute to restraining the SRB bacteria.Finally，through DGGE technology,many kinds of bacteria take into this process, for example pseudomonas aeruginosa. The results of this experiment has a great value to refrain the concentration of H2S in oil fields.
Establishment and Practice of China’s Corporate Environmental Supervisor System
Authors: Tian Jing Yi , Mao Ying Huai
Published: December 2012

Corporate Environmental Supervisor System is established referring to Japan’s public pollution prevention manager system and combining the actual situation in our country. Looking at the existing environmental regulatory system, China has built a relatively perfect monitoring system for corporate environmental pollution control, but the internal corporate environmental management is weak, corporate social and environmental responsibility not strong, internal corporate environmental management organizational system unperfected and the rights, obligations and responsibilities of corporate environmental managers indeterminate. The establishment of the corporate environmental supervisor system helps and guides enterprises to designate an environmental management director filled by the owners of enterprises and an internal corporate environmental management system consisting of at-work environmental supervisors, and the supervision and inspection of all the aspects of production are conducted by the environment supervisors who grasp environmental laws and regulations and are familiar with the production technology and pollution discharge situation of their enterprises to extend the corporate pollution prevention from the end-treatment to the whole production process. This will effectively promote the enterprises to enhance the subject responsibility and comprehensively reduce the polluting emission. In this paper, the Necessity of China's environmental supervisor system, the theoretical framework and practice are discussed.
A Study on the Relationship between Debris Flow Deposit and Environmental Evolution in Quaternary
Authors: Liang Xue Zhan
Published: December 2012

Based on field test,Typical debris flow profile in Quaternary was analyzed on the eastern edge of Qinghai-Tibet Plateau. According to relationship between debris flow deposition profile and geological age,debris flow deposition and neotectonics history,deep-sea oxygen isotope curve,loess-paleosol series were compared. Like other sediments, debris flow sedimentary body is constructed with action of neotectonics and climate.Debris flow deposits within the body surported by the absolute age date was a regular change in the vertical,which also reflected the environmental evolution. The relationship between environmental evolution and debris flow deposits was analyzed and the following conclusions were drawn: Fluctuations of debris flow deposits and intermittent uplift of neotectonics was basically a coincidence since the Quaternary in Xiaojiang River Basin whose debris flow deposits may correspond to climate of cold (cool) wet or warm (hot) wet.Fluctuations of debris flow deposits and climate cycles was basically a coincidence in Bailongjiang River Basin whose debris flow deposits only corresponds to the warm (hot) wet climate.
Wind Tunnel Experimental Study of Wind Turbine Airfoil Aerodynamic Characteristics
Authors: Tang Xin Zi , Zhang Xu , Peng Rui Tao , Liu Xiong Wei
Published: December 2012

High lift and low drag are desirable for wind turbine blade airfoils. The performance of a high lift airfoil at high Reynolds number (Re) for large wind turbine blades is different from that at low Re number for small wind turbine blades. This paper investigates the performance of a high lift airfoil DU93-W-210 at high Re number in low Re number flows through wind tunnel testing. A series of low speed wind tunnel tests were conducted in a subsonic low turbulence closed return wind tunnel at the Re number from 2×105to 5×105. The results show that the maximum lift, minimum drag and stall angle differ at different Re numbers. Prior to the onset of stall, the lift coefficient increases linearly and the slope of the lift coefficient curve is larger at a higher Re number, the drag coefficient goes up gradually as angle of attack increases for these low Re numbers, meanwhile the stall angle moves from 14° to 12° while the Re number changes from 2×105to 5×105.
The Research of LED Lights Model Based on Road Lighting in Mesopic Vision
Authors: Zhu Fang Zhou , Yuan Wei Hai , Xu Hua Mei , Yuan Yue Feng
Published: December 2012

This paper analyzes the structural features of the human eye in the middle of the road lighting visual state of the visual request of road lighting in the Mesopic range of lighting, road lighting standards to build a white and green LED light source distribution model and defines the sharpness of the image according to the model function. In the Matlab7.1 environment, high pressure sodium yellow light LED white light and LED white and green background light, the model simulation analysis of the image clarity, results show that, in the Mesopic same brightness level state road lighting selection white and green the LED light source has better clarity and sensitivity.
Energy Storage: A Key Factor for Large-Scale Utilization of Renewable Energy
Authors: Chen Ying Jian
Published: December 2012

In this paper，we first discuss the purpose as well as the main types of energy storage，then some advantages of utilizing the thermal and electrical energy storage are reviewed with emphasizing their vital role in promoting the large-scale utilization of renewable energy. Finally，some future R&D demands are pointed out.
Grid-Connected Micro-Inverter Systems Based on Mode Selector
Authors: Ling Meng , Sha Jin , Huang Chen , Lv Quan Ya
Published: December 2012

This paper briefly introduces the principles and structure of grid-connected solar micro-inverter system. Depending on different input solar power conditions, one novel method is proposed to generate the connection mode between solar panel group and micro-inverter group. Compared with existed technology, the proposed technical solution can not only enlarge the operating voltage range of the grid-connected solar micro-inverter system, but also increase the total conversion efficiency of micro-inverters.
Study on Fire Safety Planning in Chinese Petrochemical Industry Parks
Authors: Wan Han Bin , Yun Yin Xia
Published: December 2012

In order to explore the regularity of fire station construction in domestic chemical industry park, the study reviewed the typical safety incidents in decade. Under the summary of characteristics of fire disaster, explosion, and leakage incidents, this article puts forward the methods for the construction of fire station system in chemical parks, especially the fire station construction standards, equipment requirements and the enhanced fire station. Hopefully, the study will be beneficial for the future development of fire station construction in chemical industry parks.
Research the Structural Feature of Jibei Mining Area to Control the Gas Bearing
Authors: Liu Hai Yan , Li Zeng Xue , Lv Da Wei , Wang Dong Dong , Ning Wen Feng
Published: December 2012

The mining area of Jibei is an important coal production base, which located at the northern of Jining coalfield in Shandong province. The coal beds have the wide range of distribution and thicker sedimentary thickness in Shanxi Formation. The influence of structural feature to control the gas bearing in 3 coal bed is the paper’s important content. Two conclusions can be drawn from this study. The one is that open faults in whole area facilitate gasgascoal bed gas emitted from coal bed. The other is that closed faults in the local areas hinder gas emitted from coal bed. So, the laws are that the coal bed gas content and emission quantity are generally low in the whole mining area, but higher in parts area, and there are the abnormal gas zones at the special locations, where closed faults location.
Research on Camera-Oriented Smart Car and Intelligent Control
Authors: Ma Zheng , Wang Guan Bo
Published: December 2012

This paper designs a camera-oriented smart car along with specialized intelligent control algorithms. MC9S12XS128 is chosen as the central processing unit and a CCD sensor along with peripheral circuit is designed as the camera module. The proposed system integrates technologies of intelligent control, Micro-Electro-Mechanism System (MEMS), System on Chip (SOC), wireless communication and low power consumption embedded technology, realizing autonomous navigation while tracking the path. In the paper, the extraction of path information is streamlined, where dynamic threshold method is used for image binarization and path optimization is done with least square method. Control algorithms are highlighted, where servo control incorporates least squares method creatively and the DC motor control, forming a closed-loop system with a rotatory encoder, adopts incremental PID control algorithm.
Performance Analysis and Simulation of Automotive Air Conditioning Systems
Authors: Zhang Zhi , Du Peng , Zhang Pei
Published: December 2012

This paper analyzes the automotive air conditioning refrigeration cycle system, to establish the mathematical model of the compressor, condenser and evaporator. Using the Matlab to build a simulation model of the automotive air conditioning and refrigeration systems. by the simulation model of automobile air conditioning compressor, condenser and evaporator match the condensing temperature, evaporating temperature, air inlet temperature ,it is shown this model is reasonable
The KSF of LED Business Development in Taiwan with E Company as Case Study
Authors: Wang Ming Lang , Chen Han Kun
Published: December 2012

The world today actively engages in energy conservation and carbon reduction efforts to mitigate climate change ever since it has caused a major shift in the ecological system. This has thus led to the growth of LED industry. In anticipation of the market growth, worldwide LED manufacturers had their market expansion planned. Our study focused on how the LED industry in Taiwan remained competitive and its discovery of KSF in the global market.
Charging and Discharging Equalization with Improved Switching Matrix for Series-Connected Battery Pack in EV
Authors: Rong Ya Jun , Hua Chun Yu , Tang Wen Bin
Published: December 2012

This paper proposes the battery mathematical for modeling HEV(Hybrid Electrical Vehicle) high-power lithium-polymer battery. The nonlinear characteristics of Lithium Battery are expressed by the state equation. The battery parameters are obtained by the least square method to minimize errors using charge and discharge driving cycle data. The proposed method is verified by the battery cycler.