bluuebunny/crossref_metadata_2025 huggingface dataset:
Experimental Research on Damage of Rubberized Cement-Soil
Authors: Wang Feng Chi , Liu Feng Qi , Ding Jun Sheng , Wang Zhi Pan
Published: December 2012

In order to analyze rubber powder influencing on cement-soil, axial compression stress-strain curves and a series of damage relationship curves are obtained by unconfined compression test and circulating load-unload test. The damage process of rubberized cement-soil could be divided into four phases including internal tiny crack closing, cracking, crack stable extension and crack unstable extension. Rubber powder increased stress and strain threshold values of cement-soil. 10% was the best rubber powder content. Rubber powder can impede cement-soil inner tiny holes and crakes to occur and develop, so that damage resistance and deformation capability are improved.
The Study of Relationship between Rock Crack CT Image Tensor Representation Sign and its Destruction Features
Authors: Zhang Qing Cheng , Zuo Jian Min , Mao Ling Tao
Published: December 2012

By using the mine coal sample (DT - 3) and its CT image sequences, the application of stereology knowledge from the two dimensional perspective gets the DT - 3 CT images were a series of calculation for characterization of crack of second order tensor, and that the second order tensor of the characteristic value can be a very good explanation coal samples in a single shaft confining pressure under the action of the whole process of mechanical failure mechanism.
Study on the Shear Structural Yield of Soft Soil Affected by Drainage Condition
Authors: Yang Ai Wu , Kong Ling Wei , Lu Li Qiang
Published: December 2012

Four kinds of tri-axial shear structural yield stress is studied by controlling the pre-test consolidate degree and draining condition during the test. The results showed that draining condition influenced the tri-axial shear structural yield stress. When under the UU condition, structural characteristics appeared not clearly; when consolidated before testing and un-drained during test, only the undisturbed soil performed the structural yield stress; when draining during testing, the undisturbed soil showed the increased structural yield stress while the remolded soil could form certain structure. The impact of the draining condition on the structural characteristics is incurred by the change of the internal structure, which means that the draining condition have changed the arrangement and connection of the soil particles, then changed the soil structural properties.
Research on Variation of Land Subsidence in Changzhou
Authors: Xia Xiong , Xu Huang , Zhang Ai Qin , Qian Li , Huang Kai
Published: December 2012

Land subsidence as one of geological disasters, due to the characteristics and specificity hydrogeology, which results in the differences of subsidence in different regions. Changzhou City, in Jiangsu province, in China, underlain by a multi-layered aquifer system in Quaternary sediments in the Great Yangtze River Delta region. Take into account geological characteristics and mechanisms, the Changzhou layers can be divided respectively into four soil stratifications: phreatic aquifer, Part I aquifer ,Part II aquifer ,and substratum. According to the monitoring data of bedrock bench mark at Changzhou Qingliang primary school, get the mechanism of water-soil interaction and the law between land subsidence and water level change, and establishes numerical coupling model and simulates, that can evaluate and predict Changzhou land subsidence.
Failure Mechanism of Layered Salt Rock in Three-Point Bending Test
Authors: Ding Jing Yang , Liu Jia Dun , Li Chao , Yi Hai Yang
Published: December 2012

Sample of layered rock salt was subjected to three-point bending test with SHIMADZU SEM (Scanning Electron Microscope) system monitoring. Initiation and propagation of crack in both salt rock and mudstone impurity were recorded, so was the micro-structure in the interface between rock salt and mudstone impurity. By analyzing the SEM photos of failed sample, it is found that crack initially comes out in salt rock or mudstone impurity rather than the interface. Three-point bending test was numerically calculated based on bridging model. Calculation results show that the interface is not weak plane, and that the failure mode of salt rock and mudstone impurity is closely correlated with the dip angle of the infinitesimal element of the interface. When the dip is larger than 70°, tensile failure firstly occurs in mudstone impurity. When the dip is smaller than 70° , tensile failure initiates in salt rock.
Numerical Analysis of Drilling Process of Bored Pile in Seasonal Frozen Ground in the West of China
Authors: Duan Zhi Dong , Wu Ya Ping , Yan Pei Wu
Published: December 2012

In order to research shrinkage of hole-wall and plastic region around hole-wall of bored pile in drilling process, a porous analysis model was built, and drilling process of bored pile, under dry excavation technology and hydraulic excavation technology, were simulated by element birth and death feature in ADINA software. Numerical analysis results show that to seasonal frozen ground in the west of China, dry excavation technology is not appropriate, consolidation settlement caused by drilling is small and can be taken into no consideration in design, major problem in hydraulic excavation technology is shrinkage of hole-wall, which mainly influenced by density of slurry and excavation depth one time.
The Basic Problems about Fully-Mechanized Top-Coal Caving System
Authors: Leng Xin Jia , Li Er Qiang , Liu Jia Wei , Li Wen Guo
Published: December 2012

The fully mechanized top-coal caving System is a large scale complex system. The conception of system and its basic problems, such as structure, function, inner-outer environment, boundary, parameter and so on, are defined in this paper. Through the thorough research, the basic theory of fully mechanized top-coal caving will be consummated, the stability and reliability of the system will be worked over by systems engineering, and the complex problems of equipment-selection and surround rock-displace which involved of many factors will be resolved.
Numerical Simulation of the Influence of Joints on Rock Fragmentation by Drill Bit under Impact Loading
Authors: Liao Zhi Yi , Liang Zheng Zhao , Tang Chun An , Yang Yue Feng
Published: December 2012

Based on the microscopic damage mechanics, the finite element method is applied to investigate theinfluence of the inclined joint on the rock fragmentation under impact loading.The viscous boundary is considered to elimilate the influence of the reflected stress waves from the boundary. The result shows the inlcined joints change the direction of crack propagation. The lateral cracks appeare first, and thenthe main cracks tend to propagate to theleft side.
Time Effect Research of Prestressed Pipe Pile Based on High Strain Dynamic Test
Authors: Wang Jia Tao , Zhao Hong Li
Published: December 2012

More detailed information about the bearing capacity and integrity of the pile can be obtained by high strain dynamic test than by dead-load test [1]. Engineering examples show that the bearing capacity of the prestressed pipe pile gradually increase with the growth of the resting time, and the ultimate bearing capacity of the pile can reach up to 2 times more than the initial bearing capacity. Through the study of the time effect mechanism, it is found that the increment of ultimate bearing capacity of the single pile is mainly caused by side soil resistance. The end resistance has little influence on the time effect of bearing capacity of pile.
Research of Load-Bearing and Deformation Characteristics of Long-Short Pile Composite Foundation
Authors: Qian Shuang Bin , Zhang Li Hua
Published: December 2012

Long-short composite pile is a widely used ground improvement technique. This study presents the results of finite difference analyzes using FLAC3D software to investigate the load-bearing and deformation behavior of long-short pile composite foundation under various load distributions. The pile-soil load-sharing ratio and stress ratio, axial force distribution in the piles, pile side friction resistance distribution, and settlement behavior are also studied. The results show that settlement is much more significantly affected by long-pile rather than short-pile. On the other hand, the load distribution between piles and subsoil is significantly affected by the cushion.
Analysis of Bottom Frame Masonry Structure Residential Building Transition Layer Design
Authors: Hao Chang Ge , Zhang Yong Sheng
Published: December 2012

Based on a seven-storey Masonry structure building with bottom framework . This paper states and analysis it’s aseismic design,has been obtain the internal forces and deformation of this structure in the earthquake. Mathematical model built in full accordance with the current design specifications ,The comparison of calculated results with experimental results agree with well . In addition present a sustainable design method to improve the seismic capacity of such structures in earthquake action.Have a certain reference value to the engineering staff.
Shear Capacity of Multiple Eco-Composite Wall
Authors: Hou Li Na , Huang Wei , Zhang Ying , Yang Xue Jiao
Published: December 2012

Multiple eco-composite wall is one of the most commonly used lateral-load resisting member in eco-composite wall structure. The main influencing factors of shear capacity for the wall are analyzed. Based on this, the shear capacity formula of multiple eco-composite wall is put forward and the application scope of the formula is discussed. In addition, a satisfactory agreement is obtained from the comparison between the values from the formula and experimental results. Theoretical research and test analysis show that the shear formula of multiple eco-composite wall is valuable for theoretical analysis and practical application.
Mechanics Behavior of Concrete-Filled Square Steel Tube Columns
Authors: Luo Xiao Yan , Liu Wei Ping
Published: December 2012

This study presents a simplified analytical method for predicting the ultimate strength of compressed concrete filled square steel tube columns based on the triple shear unified yield criterion. Based on the triple shear unified yield criterion theory solutions of thick tube, the calculation formulas of axial bearing capacity of the concrete-filled square steel tube columns were deduced with considerations of the restriction effects of steel tube and the effects of the intermediate principal stressed. The results show that the intermediate principal stress effect parameter b has influences on the ultimate bearing capacity. The formulas in the paper have significance in exerting material potential and save material.
Summary of the Development on Concrete Filled Steel Tube Structure
Authors: Zhao Yong Sheng
Published: December 2012

The definition of concrete-filled steel tube and structural characteristics are introduced briefly. On the high bearing capacity of concrete-filled steel tube structure，economy and ease of construction are analyzed and summed up. This paper expounds the general situation of the development of concrete-filled steel tube and research progress.
Nonlinear Analysis of Shear Performance for Joint of Steel Reinforced Concrete Beam and Angle-Steel Concrete Column
Authors: Wang Kun , Xu Shi Yun , Luo Hui Hui
Published: December 2012

Based on the simulated results of joint of SRC beam and RC column (steel reinforced concrete beam and reinforced concrete column) with steel anchor, an analytical research on failure models and shear performance of three types of joints is conducted, which is composed of SRC beam and RC column, of SRC beam and column (steel reinforced concrete beam and column) and of SRC beam and ASC column (steel reinforced concrete beam and angle-steel concrete column). Then the parameters analysis for joint of SRC beam and ASC column is carried out, and the design formula of shear capacity for joint of SRC beam and ASC column is given on account of a great number of calculated and statistic results.
Applications of Carbon Dioxide Cannon Blasting on the Problem of Triangular Flap Top in Coal Mine Handling Mechanized Mining Face
Authors: Zhang Yan Bo , Li Er Qiang , Liu Jia Wei , Leng Xin Jia , Li Wen Guo
Published: December 2012

As mining process in the Mechanized mining face, making it easy come with flap top[1] along the the upward and downward entries. In this paper, through the use of carbon dioxide cannon, we do pre-split blasting experiment on triangular flap top in mechanized mining face, exploring an effective solution to a large area of goaf flap top suddenly breaking down, with the hurricane caused damage and fan-out of toxic and harmful gases, to achieve the purpose of production safety.
Experimental Research on Shear Behavior of Reinforced Concrete Beams with High-Strength Stirrup under Uniform Load
Authors: Li Yan Yan , Zhang Yan Ping , Chen Yan Feng
Published: December 2012

According to tests of 8 T concrete beams with HRB500 steel bars as stirrup, the shear behavior of beams was researched under uniform load, and the influencing factors of diagonal crack width were analyzed, such as the different concrete strength, stirrup spacing and the welded wire fabric. Experimental results show that concrete beams with HRB500 steel bars as stirrup show similar behavior to the beams with conventional stirrup, and the stirrups yield can be achieved which meets the requirement of shear behavior in structure. In addition, the welded wire fabric can be used as one of the new kinds of reinforcement to control diagonal crack width.
Study on Mechanical Performance of the End-Plate Connection Joint between H-Section Beam and Closed Specially-Shaped Column
Authors: Wang Heng Hua , Wang Xi Yu , Liu Yang Qing , Yu Xiao
Published: December 2012

This paper brings forward a new kind of specially-shaped column and its end-plate connection joint with H-section beam. The static loading and cyclic loading simulation tests of the joint are carried out using the finite element software. Under static load, the moment-rotation curves with different parameters are obtained, and then the effects of those parameters on the initial stiffness and the ultimate moment and the stress distribution of key positions of the joint are discussed; under cyclic load, the moment-rotation hysteretic curves are obtained and mechanical behaviors of the basic test specimen are comprehensively analyzed. The results indicate that the joint possesses not only reasonably high initial stiffness and ultimate capacity, but also excellent ductility and energy-dissipation capacity.
Transformed Section Method to Calculate Stress of R.C. Box Beams Considering Shear Lag
Authors: Lin Li Xia , Ding Nan Hong , Wu Ya Ping
Published: December 2012

The tensile and compression performance and shear performance should not be changed when using variation principle to analyze shear lag of box beams. So based on transformed-section method, the section composed with steel and concrete can be transformed to one section made of supposing material. The shear lag of supposing section is analyzed to calculate the distribution of normal stress, then according to the constitutive relation of steel and concrete, the stress of actual section can be obtained. At last, the formula of normal stress in flange slab for reinforced concrete box girder is given.
The Research on the Influence of Connection Stiffness to the Multi-Layers Staggered Steel Truss Structure Performance
Authors: Shi Yu Zhou , Zheng Xiao Yan , Li Yan
Published: December 2012

In the design and calculation of staggered steel truss structure, we always assume that truss chord and pillars is hinged while longitudinal beam and pillars is rigid-jointed. But each connection mode in engineering has certain rotary stiffness, they can't completely meet the design requirements. In this paper, 8 finite element models are established with different connection stiffness to compare the effects to the structure performance. In order to explore how the node connection stiffness influence the multi-layers staggered steel truss structure stress on the performance of the law, this paper provide the theory basis for the structure design and construction research.
Study on Impact Force of Landfall and Rockfall
Authors: Qi Su , Zhou Chen , Liu Shu Hao , Song Xiong
Published: December 2012

The original algorithm holds that the weight and impact force of rockfall are large different. For easy calculation, the rockfall own weight can be almost neglected. But the impact force of rockfall has a slow increase of the process by the resisting effect of the soil during landfall and rockfall impacting soil over the pipe, which the rockfall own weight to the contribution of the impact force is great. Therefore, it is necessary to study on impact force of landfall and rockfall. We establish the mathematical model of impact force of landfall and rockfall by mathematics and mechanics knowledge, and put forward the wallop amplification coefficient method by the count, which results more close to the actual situation, comparing with the original algorithm. It shows that result, which is better than the original algorithm results, by the wallop amplification coefficient method can be widely used in practical projects.
Influence Factors of the Compression Performance of CFRP Sheet Confined GFRP Short Pipe
Authors: Li Feng , Zhao Qi Lin , Wang Jian Ping
Published: December 2012

Compression performance of pultruded GFRP (Glass Fiber Reinforced Plastics) can be improved by confined CFRP (Carbon Fiber Reinforced Plastics) sheet, but it was affected by some factors. Two groups GFRP short pipe specimens of different outer diameter (104mm and 76mm) were axial compressed. The failure modes of longitudinal splitting and compressive strength failure for the GFRP pipes and those confined by CFRP sheet respectively were comparatively analyzed. Analysis on the influence to the compressive performance of GFRP short pipes confined by CFRP sheet was made from mechanical and geometrical parameters of the CFRP and GFRP in numerical methods. The laws of improvement of compression performance of CFRP sheet confined GFRP short pipe were recognized.
The Controlling Effect of Unconformity Structure on Hydrocarbon Accumulation
Authors: Feng Yue Gang , Zhang Ming Qi
Published: December 2012

Based on lots of previous studies, the unconformity structure characteristics were studied and the controlling effect of unconformity structure on hydrocarbon reservoir, migration path and oil-gas reservoir type were analyzed. The result shows that the unconformity structure is composed of upper basal conglomerate layer, lower weathering clay layer and semi-weathering rock; the interlocking pores in basal conglomerate layer and pore-cave-fracture system in semi-weathering rock are the main storage space of hydrocarbon reservoir; And hydrocarbon migrates laterally through capillary “channeling effect” in interlocking pores, and the pore-cave-fracture system in semi-weathering rock is an important path for hydrocarbon migration laterally and vertically; stratigraphic overlap hydrocarbon reservoir and stratigraphic unconformity reservoir are the two type of reservoirs related to unconformity, and buried hill reservoir is an important type of the latter.
Dynamic Analysis of Elastic Support Beam Subject to Moving Load
Authors: Liu Yang
Published: December 2012

The dynamics of elastic support beam are studied and the latent equation of the freely vibration modes of elastic bearing beam is deduced. The equation of the forced vibration of an elastically supported beam is obtained by the Lagrange equations and the influence of spring stiffness and moving load speed are analyzed. Calculation results show: the elastic supports have great effects on responses of beams, the dynamic amplification of deflections and stresses increases with the spring stiffness; the dynamic response of beam also increase with the increase of the speed of moving loads.
The Mechanical Properties Analysis of Heterotypic Spatial Plate and Shell Structure Model
Authors: Duan Shao Wei , Zhou Peng , Hu Xi Bing
Published: December 2012

The shape of heterotypic spatial plate and shell structure is irregular, the performance of force is complex, so it is necessary to analyze the stress performance for this heterotypic spatial plate and shell structure, and understand the stress characteristics. By using the finite element program MIDAS to analyze its mechanical properties in elastic stage, and put forward the deformation coefficient of K to embody the deformation performance of spatial plate and shell structure. Through analyzing the influence factors, such as inclination of shell, concrete strength and thickness of shell, to effect mechanical properties of the heterotypic spatial plate and shell structure.
Precast Concrete Frame Structure
Authors: Yin Wan Yun , Xia Shan , Zhang Xiang , Ding Ke Wei , Jin Ren Cai , Liu Shou Chen
Published: December 2012

With the rapid development of building process of industrialization in China, obtained the rapid development of precast concrete frame structures. This article is reading about precast concrete frame structure system at home and abroad on the basis of article. For describes precast concrete frame structure project background and the testing of components, to research the behaviors of precast concrete frame structure system.
Finite Element Analysis on Mechanic Behavior of Joints between Elevated Columns and Truss Columns in Substation Frame
Authors: Song An Liang , Ran Hong Dong , Su Ming Zhou , Wang Zhen Shan , Shi Yun
Published: December 2012

Finite element analysis have been carried out in order to study the mechanical properties of the joints between elevated columns and truss column in substation frame. Firstly, the numerical results and the experimental ones were compared to verify the efficiency of the FEM model. Then, the whole process of elastic-plastic analysis was carried out to the prototype structure. The results show that when the bottom of the elevated column was yielding, the stress of the stiffeners at the joint is small, which can meet the design principle of “strong joint - weak member” criterion. Furthermore, when the structure enters into the elastic-plastic stage, the stress in the upper stiffeners at the horizontal load direction is large and most of them yield, but the stress in the plane gusset plate of the joint is still small.
Construction Technology of the Fatigue Property of CFRP Reinforce Steel Crane Beam
Authors: Yang Yong Xin , Yue Qing Rui , Lian Jie , He Jun , Xia Xiao Ning
Published: December 2012

In a certain steelmaking plant, there were many steel beams to be strengthened by CFRP because the fatigue stress range could not satisfy the requirement of the standard. According to the project condition of high temperature and dust, and the strict construct cycle in construction, we would make sure the reasonable construction technology and the control of construction process after choosing the proper strengthening materials. The whole construction process including: 1.surface disposed, burnish area pasted, and reveal the component; 2.orientation, make sure the pasted area based on the drawing; 3. paste CFRP by the drawing; 4. paste up the defend dope; 5. quality check up; 6.long range supervise. Practice testify, CFRP strengthens is feasible for FRP strengthens appliance and development, and develop the domain of FRP strengthens. It makes progress for engineering appliance of FRP in our country.
Experimental Comparative Study on PC Beams Dynamic Performance with Different Adhering form Prepress
Authors: Cheng Shou Yu , Yan Dong Jin , Zhai Jin Ming , Li Yan Zhao , Cai Qing Hua , Xu Guo Xing
Published: December 2012

By the method of plane charge on the tested beams, this paper studied 5 groups 15 pieces of beams， dynamic performance by 14 times loadings, displayed the deflection waveform curves, measured the bearing ability of beams, analyzed the effects of the deformed performance and the ductility of the test beams with different adhering forms.
Variation Characteristics of Reactive Plumes in the Process of Extinguishing Diesel Flame by Water Mist
Authors: Wang Liang , Su Shi Chuan
Published: December 2012

By using the three-dimensional governing equations of plumes, the cumulative volume fraction and the model of water suppress fire, the variation characteristics of the reactive plumes in the process of water mist suppress the diesel jet flame are studied. For the different effects of water mist and no water mist, the eddy structure of plume, averaged velocity and averaged temperature in the above of fire source are analyzed, respectively. It seems that there are expansibility and geometric symmetry for the eddy structure in the early stage of the water mist control. However, as a whole, the water mist has cooling effect for the plume area, and it can also reduce the spread velocity of plume. The large-scale structure can be formed quickly, and the temperature is affected by the droplet size and droplet density. However, for the case of no water mist, the bursting of smaller scale vortices can be enhanced, and its structural characteristic has an affect on the distribution of averaged temperature. Computational results have important significance for the water mist to be used in the ship engineer room.
Construction Waste Recycling Technology Management Based on Circular Economic Theory
Authors: Wu Jiang Lin , Deng Yan Bing
Published: December 2012

The article discussed mainly 3R principles of circular economy, and how to take use of 3R principles to manage construction waste. At last, gave some suggestions of managing construction waste, in order to exhort people to focus on reducing, reusing and recycling of construction waste.So,heighten people awareness of saving resources and protecting environment. On the other side, hope that these suggestions can provide scientific reference to government in managing construction waste.
Explore the Self-Governance on Nuclear Safety Emergency - A Case Study of the 3rd Nuclear Power Plant
Authors: Lin Yi Chun , Yang Yung Nane
Published: December 2012

The ripples of the tsunami crisis in Japan triggered introspections of nuclear plant safety issues in the worldwide. Many countries have claimed the suspension of nuclear power plants. However, some countries such as Taiwan, under nearly 99% energy is exported, the disasters force government and citizen to face the importance of nuclear safety, especially the neighborhoods nearby the nuclear power plants. We have to face the nuclear safety since there is no other alternative energy presently. The 3rd nuclear power plant located in the south of Taiwan, which has the same geographic features with Fukushima, Japan. Presently, there is no precedent in Taiwan of precaution and rescue team and civil supervised mechanic on nuclear security issue. This paper will review according to transparent information, public participation and cross-organization cooperation to propose the execution and work division principles, including information monitor, educational propagation, hide and evacuation, emergence aid and care, rear and refuge service. The ultimate target is to establish self-governance inside nearby neighborhood to confront nuclear disaster at the critical moment.
Changes of Value of Ecosystem Services and its Driving Forces in the Lower Reaches of the Tarim River
Authors: Huang Xiang , Li Wei Hong , Ma Jian Xin
Published: December 2012

In this paper, we used TM image data in the lower reaches of the Tarim River as well as ecosystem service value assessment methods, and assessed the change of regional land use/ cover and analyzed its ecosystem service value, and discussed the driving forces of the change factors. The results show that : the study area is mainly grassland and desert grasslands accounted for more than 43% , the desert about 32% , less than 6% of the forest area , waters and wetlands area , less than 1% of the total area, which mean that the area is mainly the oasis agriculture , desertification serious water shortages. Since 2000, the , the ecological restoration project significantly effective under the emergency water conveyance on the lower reaches of the Tarim River, woodland restoration and water area increased , the desert area has decreased. GDP continued to increase from 2000 to 2005, the value of ecosystem services greatly reduce. In a shorter time scale, agricultural development and human activity are the dominant factors of the transfer of the value of ecosystem structure adjustment and service functions in the study area.
Influence of Influent pH on Ceramic Printing Wastewater Treatment
Authors: Zhang Yong Li , Huang Zhi Zhen , Zhou Man Man
Published: December 2012

Investigated the influence of absorbency, turbidity and suspended substance in printing wastewater treatment by regulating the pH value of water treatment. Firstly, was acidified the wastewater samples to 5, 4, 3, 2, then alkalize them to 8、9、10、11、12. Calculated decolorization removal, turbidity removal and the suspended substance removal. The results show that, the decolorization removal and the turbidity removal were low after acidification. While after alkalized treatment the decolorization removal and the turbidity removal were all rise. The decolorization removal and turbidity removal increased following with the increase of pH of samples that first acidified and then alkalized. And it was the most obvious when the pH was 12. When the wastewater samples first acidized the pH to 4 and then alkalized the pH to 12, the dispose effects was the best. In these conditions, the decolorization removal and turbidity removal could reach 57.7 % and 72.8 %. After acidification, the suspended solids removal came down followed with the rise of pH value. As the water samples in same acidification value and then alkalized, with the increase of pH, the suspended solids removal first rose and then came down. It could get the best dispose effects at the pH 11, the suspended solids removal could reach 41.4 %.
Application of Life Cycle Assessment in Agricultural Circular Economy
Authors: Zhang Xiao Xian , Ma Fang , Wang Li
Published: December 2012

Life cycle assessment is a technique to assess potential environmental impacts associated with all the stages of a product, process or service. This paper introduces life cycle assessment into the full process of agricultural circular economy. There are increasing environmental risks associated with agricultural circular economy; however, no appropriate assessment and analysis techniques on environmental impact are available. Due to the lack of special life cycle assessment database and available methodology in agricultural circular economy, we proposed a life cycle assessment technical framework with emphasis on problems associated with traditional agricultural circular economy life cycle assessment. This paper is aimed to produce reliable information on the environmental impact assessment for agriculture policy-makers, producers and consumers to help them choose sustainable development agricultural products and processes.
A Simulation Training System of Multi-Effect Seawater Desalination
Authors: Li Wei Qing , Wu Yong
Published: December 2012

A simulation training system of multi-effect seawater desalination is helpful for research and training. A method of organizing the virtual space and models into a hierarchy tree was proposed, according to their topology relationship. The simulation model of seawater desalination plant was given, and the PID control system was designed. According to different kinds of operation modes, the meaning of gestures in different scene context was analyzed. A context-sensitive fast algorithm was proposed to accelerate the collision detection. A simulation training system of multi-effect seawater desalination is successfully realized and applied in worker’s training.
A New Calculation Method of Environmental Similarity
Authors: Xu Xiao Man , Ke Jun Xian , Kun Dan
Published: December 2012

The environmental similarity in this study is the special part of ships' ballast water risk assessment of environmental similarity in ships' ballast water risk assessment. The environmental similarity refers to the degree of similarity between two or more ports. For the study of ships' ballast water, the main consideration is the degree of similarity between the port seawater, in the process of the degree of similarity to the seawater, choosing temperature, salinity, pH, DO, DIN, DIP to calculate the environmental similarity. Firstly, the two calculating environments similarity methods (angle cosine method and based on the concept of ORDR (overlap ratio of data ranges) environmental similarity calculation method) are described and discussed. And analyze their problems. Then, propose a new method for calculating the environmental similarity.
Influence of Reaction Pressure on Papermaking Black Liquor Treatment with Wet Oxidation Method
Authors: Hao Gui Xia , Zhong Zhan Rou , Liao Wei Ming
Published: December 2012

The papermaking black liquor of one Paper Mill in ChaoZhou, GuangDong Province was treated with the wet oxidation method and the influence on treatment effect with the reaction pressure was researched. Experimental results showed that the papermaking black liquor was treated by the wet oxidation method; the treatment effect was showed upward trend with the increase of the reaction pressure, and the reaction pressure of 3.5 MPa is appropriate. The papermaking black liquor was treated by the wet oxidation method, the influent pH about 8.00 showing weakly alkaline basically. The decolorization removal and turbidity removal first increases and then slightly decreases basically with the increase of reaction time.When the reaction time is 60 min, the treatment effect is overall best. The decolorization removal can reach 61.1 % and the turbidity removal can reach 73.8 %.
The Reliability Evaluation Methods of the Wind Farm
Authors: Wang Huan , Pan Lei
Published: December 2012

The evaluation methods of wind farm in China are not perfect enough, and there are a few differences between analyze and evaluate. The reliability evaluation of wind resources and generated energy can improve wind resources evaluation level and estimating generated energy accurately. How to evaluate wind farm is the emphases. The paper brings forward the reliability analyze of the wind turbine, and the methods of the evaluation wind farm. The reliability evaluation could improve the generated efficiency and economic benefits.
The Development and Optimal Allocation of Water Resources in Zhidan Country Energy Chemical Industrial Park
Authors: Jin Peng Kang , Zhang Lei , Wang Xian Bao , Feng Yong Ning
Published: December 2012

Focusing on the water shortage and water stress during the construction period of Zhidan energy chemical industrial park, the optimal allocation of water resources in Zhidan was conducted, in order to guarantee the water demand of the energy chemical industrial park. The optimal allocation of water resources is based on the advanced investigating and analyzing on the potential of four kinds of available water in this industrial park (surface water, underground water, the rain-flood and the recycled water). As well as the principle of optimal allocation is to reduce the conventional water exploitation and to increase the unconventional water resource utilization. The study result shows, the recent total water resources in this park is 12.39×104 m3/d and the forward total water resources is 13.39×104 m3/d, which can meet the requirement of both recent and forward water consumption for this park(4.40×104 m3/d and 5.16×104 m3/d). The optimal allocation of water resources program is to achieve the goal of reaching a recent water supply of 4.5×104 m3/d, among which the underground water is 0.95×104 m3/d, the surface water is 3.0×104 m3/d, the recycled water is 0.5×104 m3/d, the rain-flood water is 0.05×104 m3/d. While for the forward water supply of these 4 available kinds of water are 1.45×104 m3/d, 3.0×104 m3/d, 1.0×104 m3/d, 0.05×104 m3/d respectively with a total supply of 5.5 ×104 m3/d.
The Impact of Green Tide on the Phytoplankton Community in Yellow Sea
Authors: Song Xiu Kai , Shi Ya Jun , Liu Ai Ying , Xing Hong Yan , Jiang Hui Chao , Wang Wen Jie , Zhang Li Min
Published: December 2012

In order to analyze the impact of the green tide (Ulva prolifera) on the phytoplankton community, eight surveys were conducted in the sea area of Haiyang, Yantai and Rizhao from July 2008 to September 2008. In the surveys, 62 phytoplankton species were identified, belonging to 4 phyla, 31 genera. The average abundance of the phytoplankton was 3.49×106 cells/m3(1.59×105–1.28×107 cells/m3), with a proportion of 92.02% diatom and 6.70% dinoflagellate. The Superscript text phytoplankton abundance gradually decreased from the inshore area to the offshore area. When green tide occurred, the dominant phytoplankton shifted from Chaetoceros curvisetus, Ceratium tripos, Chaetoceros affinis, Skeletonema costatum to Thalassionema nitzschioides in Haiyang, Yantai and Rizhao.. The varied nutrients caused by green tide could be an important factor for the dominant species shift in the phytoplankton community.
Non-Uniform Electrokinetic Removal of Heavy Metals from Contaminated Soil with Permeable Reactive Composite Electrodes
Authors: Liu Fang
Published: December 2012

A hexagonal unit cell for non-uniform electrokinetic (EK) remediation was constructed and the electric field distribution of the cell was simulated using MATLAB software. The changes of soil pH and residues of heavy metals in different parts of the cell during the permeable reactive composite electrode electrokinetic (PRCE-EK) remediation were also studied. The results showed that, the changes of soil pH, the removal of heavy metals and the distribution of the non-uniform electric field in the cell were closely related to one another during the PRCE-EK remediation. Simulation of electric field distribution could help to predict the changes of soil pH of different parts of the cell, and then help to optimize the EK remediation process. The results also showed that an acidic migration band, which could prevent premature precipitation of heavy metals to a certain extent and promote EK removal of heavy metals, was formed in the whole hexagonal cell when the cathode used PRCE during the non-uniform EK remediation of cationic metallic ions, Cd2+ and Pb2+. After 480 hours of remediation, the total removal efficiency of Cd and Pb were 89.9% and 69.3%, respectively. Further prolonging remediation and constantly replacing electrodes with new ones could obtain better remediation results.
Review of the Treatment of Water Containing Arsenic
Authors: Chen Yun Nen , Ding Li Chao , Liu Chun Hua
Published: December 2012

Based on referring to a large number of domestic and international literatures, the situation of arsenic pollution, the source of arsenic in drinking water and the present treatment of it were summarised. A comment on treatment for arsenic water has been made.
Flocculation and Sedimentation of Bauxite Flotation Tailings
Authors: Xie Hai Yun , Gao Li Kun , He Shu Ming , Liu Dian Wen , Tong Xiong
Published: December 2012

Flocculation and sedimentation of fine bauxite from flotation tailing pulp were studied using different flocculants to investigate the possibility of its application. The results of this investigation indicate that inorganic flocculants of PAC and PAS have better flocculating effect than organic flocculants of PAM1# and PAM2# when keeping the original pH (7.5~8.0) of tailing pulp, however its consumption are large. It was found that the pH of pulp is important to the tailings settlement. The dosage of flocculants are greatly reduced and the velocity of floc settling is accelerated when the pH of tailing pulp is adjusted to 6.5~7.0 using sulfuric acid. PAM1# and PAM2# are effective flocculants for fine bauxite from the tailings pulp and improved the sedimentation performance compared with PAC and PAS at pH 6.5~7.0. It was also found that the flocculants can be used in combination to treat original bauxite tailing, and good sedimentation effect has been achieved, but the dosage of reagents is bigger when the organic flocculant is combined with inorganic flocculant.
Study of CO2 Emissions Decrease in Metallurgy Industry of Czech Republic
Authors: Jursová Simona , Pustějovská Pavlína , Frantík Jaroslav , Sassmanová Veronika
Published: December 2012

The paper deals with possibilities of decrease in CO2 emissions in Moravian Silesian region, Czech Republic, typical of metallurgy industry. It analyses various kinds of technical and technological approaches of metallurgical industry to this problem. It discusses application of hydro – carbon fuels in iron -making process which seems to be technologically and economically beneficial alternative for blast furnace fuel. The paper devotes to hydrocarbon fuels application relating with the decrease in CO2 emissions
Preliminary Study of the Geological Disaster Modeling in the Three-Dimensional Tunnel Project
Authors: Zu Xiao Fang , Hua Wei Hua , Luo Jin
Published: December 2012

There are various potential natural geological disasters in the process of tunnel construction, such as methane gas, tunnel collapse, tunnel gushing, etc. Due to the limited data collection and the invisibility of some natural phenomenon, how to simulate these geological disasters more visually and increase its early warning management more effectively has been a tough problem in three-dimensional simulation. This paper briefly describes the GIS-based three-dimensional rendering technology and the feature attribute management method to achieve the geological disasters modeling in the tunnel and its simulated prediction, which can provide auxiliary support for the decision of the safe construction of tunnel engineering.
Influence of Influent Concentration on Papermaking Black Liquor Treatment with Wet Air Oxidation Method
Authors: Chu Zhao Hua , Geng Xu , Zheng Cheng Lin
Published: December 2012

Black liquor was processed with wet air oxidation technology in these experiments. Influence of its influent concentration was researched. COD, absorbance, turbidity and pH of the water samples were measured and analyzed. The results showed that: the treatment effect of each index in black liquor treatment with wet air oxidation method gradually weakened with the increase of influent concentration from the overall point of view; when papermaking black liquor was processed by wet oxidation, the water samples was weak alkaline basically, with pH in between 7.83 to 8.70. COD removal, decolorization removal and turbidity removal basically improved with the extension of time, the COD removal and decolorization removal can reach 50 % or more basically. When influent concentration was greater than 5500 mg/L, turbidity removal was less than 40 %. So the influent concentration of the black liquor in wet oxidation treatment should not be too large, the influent concentration of 2500 mg/L to 4000 mg/L is appropriate.
Design and Simulation Analysis of Doubly Fed Induction Generator Wind Turbines
Authors: Cheng Peng , Li Feng Yan , Li Ji Hui
Published: December 2012

With increasing emphasis on the energy crisis and environmental pollutions, wind power has been developing rapidly worldwide. Because of its unique advantage of variable-speed constant-frequency (VSCF), doubly fed induction wind generator (DFIG) has been widely used in the wind power industry. In this paper, a 3.5kW doubly fed induction wind generator is designed and modeled utilizing ANSOFT, after the optimization of the generator parameters, the data of the stator and rotor no-load and full-load are given by simulation. On this basis, a physical model of doubly fed wind generator is established by Maxwell 2D. And through a finite element triangulation, the distributions of magnetic lines of force and magnetic field within the motor are obtained.
Ashing Temperature’s Impact on the Characteristics of Biomass Ash
Authors: Li Wen Ni , Li Qing Hai , Zhang Yan Guo , Meng Ai Hong
Published: December 2012

Currently, GB(T212—1996), the coal industrial analysis standard, and ASTM(E870-82) , the American Society for Testing Material, are two main methods of studying basic characteristics of biomass in China. In this work, nine kinds of biomass are burned to ash under two standard temperatures, 815°C(GB) and 590°C(ASTM), whose contents are then measured , composition analysed through XRF(X-ray fluorescence)and fusion temperatures tested by 5E-AFⅢ intelligent ash fusion temperature tester. As can be seen in the tests, biomass produced under different ashing temperatures differs in ash content and composition, and the variation of ash composition further contributes to the variation of ash fusion temperatures. The results of the experiments indicate that, ashing temperatures have a significant influence on ash content. The effect of ashing temperatures on ash composition tends to be higher in biomass with higher content of the element K. As with biomass with high contents of K and Ca, ash fusion temperatures are sensitive to the variation of ashing temperatures. As a result, when dealing with biomass of this kind, lower ashing temperatures should be chosen.
Implementation of Secure GOOSE Protocol Using HSM
Authors: Kim Jin Cheol , Kim Young Eok , Kim Tae Hun
Published: December 2012

The smart grid is a developing network of transmission lines, equipment, controls and new technologies working together to respond immediately to 21st Century demand for electricity, but the smart grid may also create much new vulnerability if not deployed with the appropriate security controls. In this paper, to evaluate the secure GOOSE message performance, we implemented the IEC 62351-6 MAC mechanism, applied it on F-IED using the IEC 61850 GOOSE stack and the HSM, built the security test environment, and obtained test results.
Role of Green Coverings in Mitigating Heat Island Effects: An Analysis of Physical Models
Authors: Peri Giorgia , Rizzo Gianfranco , Scaccianoce Gianluca , Sorrentino Giancarlo
Published: December 2012

Worldwide, governments are introducing several rules and standards in the aim of limiting the quantity of primary energy for air conditioning of buildings and supporting the use of renewable source of energy for generating thermal and electric energy to be utilized in buildings such as the European Directive on the Energy Performance of Buildings [1]. Along with these interventions, another important action takes currently place in the building sector, that is the introduction of passive structural components of the envelope, able to reduce the requirements of energy for air conditioning purposes. Among these building components, the so-called green roofs are becoming more and more interesting for designer and buildings owners. This simple technical solution, in fact, apart its effectiveness in lowering particularly the summer cooling loads, could make more attractive the shape of each single building and, when adopted on a large extension, of an entire city district, reducing the risks for urban heat island phenomena that represent a severe problem in urban contexts. In this work, a short review of the literature models for computing the energy balance of roof coverings will be proposed, with particular reference in modelling the heat exchange of a canopy.
Dynamic Response of a Semi-Submersible Floating Offshore Wind Turbine in Storm Condition
Authors: Wu Hai Tao , Jiang Jin , Zhao Jing , Ye Xiao Rong
Published: December 2012

The paper focuses on a semi-submersible floating offshore wind turbine (FOWT) and analyses its dynamic response in storm condition. The wind load is calculated based on wind block model; the hydrodynamic load is modeled using Potential Theory and Morison Equation. The time-domain dynamic response of the FOWT is simulated by SESAM software with duration of 3 hours. The performance of the FOWT is analyzed based on time history responses and response spectrums. The results show some unique characteristics that differ from offshore platforms and the analysis proofs that the performance is acceptable and the design is reliable.