When building foundation pit in city intensive area, traditional foundation pit support method needs to occupy some space on the side of the foundation pit. In order to overcome the shortcomings of waste of land resources to make the land area of 100% utilization, a design calculation method for "zero-occupancy" foundation pit support structure is proposed. The method uses high pressure spinning technology to construct interlocking cement soil columns to underpin the soil under the foundation of the building adjacent to the foundation pit. According to different working condition of the construction, the corresponding calculation method is given. The bearing capacity, resistance to deformation and settlement deformation of the surrounding buildings are calculated and analyzed by an example. Combined with the characteristics of the construction of the new method of "zero-occupancy" foundation pit support structure, the corresponding precautions and requirements are put forward.
{"title":"New Design Calculation Method for \"Zero-Occupancy\" Foundation Pit Support Structure that Adjacent to Building","authors":"Bing-nan Jiang, Jianlin Ma, Jing-lei Chu, Junfeng Gao","doi":"10.1145/3208854.3208885","DOIUrl":"https://doi.org/10.1145/3208854.3208885","url":null,"abstract":"When building foundation pit in city intensive area, traditional foundation pit support method needs to occupy some space on the side of the foundation pit. In order to overcome the shortcomings of waste of land resources to make the land area of 100% utilization, a design calculation method for \"zero-occupancy\" foundation pit support structure is proposed. The method uses high pressure spinning technology to construct interlocking cement soil columns to underpin the soil under the foundation of the building adjacent to the foundation pit. According to different working condition of the construction, the corresponding calculation method is given. The bearing capacity, resistance to deformation and settlement deformation of the surrounding buildings are calculated and analyzed by an example. Combined with the characteristics of the construction of the new method of \"zero-occupancy\" foundation pit support structure, the corresponding precautions and requirements are put forward.","PeriodicalId":365707,"journal":{"name":"IEEA '18","volume":"102 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132526249","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Modaoxi landslide was caused by artificial cutting slope and improper prevention measures. In the early stage, the shallow deformation occurred in the slope due to improper design, and then the deep deformation of the slope was caused by several adverse factors such as excavation and heavy rain, which led to decrease rapidly in the stability. Therefore, this paper elaborates the engineering geological background, deep displacement monitoring, slope stability, project management process, and deformation mechanism of Modaoxi landslide, which uses "double row pile" comprehensive scheme after comparison of several schemes to renovate the landslide, which is of a good effect. The results show that: a) "Double row pile" scheme is the best scheme of regulating Cross-bedding Rock landslide with huge thrust, which can be used for reference in similar projects; b) Selecting highway line must implement the geological alignment selection principle and eliminate artificial cutting slope which can cause landslide. It is necessary to compare design scheme like "bridge cross river" and "tunnel into mountain" in order to choose the best one. c) When open tunnel structures cross the landslide, it has to prevent the tunnel from being eccentric stress state, which potentially threats the open tunnel. d) The establishment of dynamic monitoring network plays a key role in the regulation project for providing a reliable basis to determine the range of Cross-bedding Rock Landslide deformation, rock landslide sliding surface, sliding direction, excavation impact on landslide.
{"title":"The Study of Cross-bedding Rock Landslide's Failure Mechanism and Prevention Measures","authors":"Lijuan Sun, Hong-gang Wu, Qihang Cheng","doi":"10.1145/3208854.3208888","DOIUrl":"https://doi.org/10.1145/3208854.3208888","url":null,"abstract":"Modaoxi landslide was caused by artificial cutting slope and improper prevention measures. In the early stage, the shallow deformation occurred in the slope due to improper design, and then the deep deformation of the slope was caused by several adverse factors such as excavation and heavy rain, which led to decrease rapidly in the stability. Therefore, this paper elaborates the engineering geological background, deep displacement monitoring, slope stability, project management process, and deformation mechanism of Modaoxi landslide, which uses \"double row pile\" comprehensive scheme after comparison of several schemes to renovate the landslide, which is of a good effect. The results show that: a) \"Double row pile\" scheme is the best scheme of regulating Cross-bedding Rock landslide with huge thrust, which can be used for reference in similar projects; b) Selecting highway line must implement the geological alignment selection principle and eliminate artificial cutting slope which can cause landslide. It is necessary to compare design scheme like \"bridge cross river\" and \"tunnel into mountain\" in order to choose the best one. c) When open tunnel structures cross the landslide, it has to prevent the tunnel from being eccentric stress state, which potentially threats the open tunnel. d) The establishment of dynamic monitoring network plays a key role in the regulation project for providing a reliable basis to determine the range of Cross-bedding Rock Landslide deformation, rock landslide sliding surface, sliding direction, excavation impact on landslide.","PeriodicalId":365707,"journal":{"name":"IEEA '18","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125694564","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Cesium is one of the major radionuclides occur in nuclear power plants, and cause toxicity to the environment, especially the water body. In this study, reduced graphene oxide (RGO) is found to be a potential sorbent for Cs removal, as it requires simple synthesis process with no hazardous chemical addition. The highest capacity obtained from adsorption isotherm of this RGO is 111 mg Cs/g sorbent, using Langmuir model. Fractional factorial design (FFD) was employed in order to evaluate the effects of the major cations and anions in seawater on the sorption of Cs onto the as-prepared RGO. The order of inhibiting effect of these ions obtained from FFD is as follow: Na+ > Cl- > Mg2+ > Ca2+ > K+ > SO42-.
{"title":"Seawater Ions Effect on the Adsorption of Cesium by Reduced Graphene Oxide Using Fractional Factorial Design","authors":"G. T. Le, N. Grisdanurak, P. Sreearunothai","doi":"10.1145/3208854.3208877","DOIUrl":"https://doi.org/10.1145/3208854.3208877","url":null,"abstract":"Cesium is one of the major radionuclides occur in nuclear power plants, and cause toxicity to the environment, especially the water body. In this study, reduced graphene oxide (RGO) is found to be a potential sorbent for Cs removal, as it requires simple synthesis process with no hazardous chemical addition. The highest capacity obtained from adsorption isotherm of this RGO is 111 mg Cs/g sorbent, using Langmuir model. Fractional factorial design (FFD) was employed in order to evaluate the effects of the major cations and anions in seawater on the sorption of Cs onto the as-prepared RGO. The order of inhibiting effect of these ions obtained from FFD is as follow: Na+ > Cl- > Mg2+ > Ca2+ > K+ > SO42-.","PeriodicalId":365707,"journal":{"name":"IEEA '18","volume":"86 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130494548","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Flow patterns identification of the gas--solid flow in pneumatic transport pipelines is significant for the optimized design and operation of the pneumatic conveying system. The objective of this work is to training an Artificial Neural Network(ANN) to identify flow patterns (suspension flow, laminar flow, dense-dilute flow and dune flow) of the gas-solid flow in a horizontal pneumatic conveying pipeline. The performance of the ANN models was evaluated respectively using Hurst exponent of a ring-shaped electrode's output signal and Hurst exponent matrix of an electrostatic sensor array's output signals. Results show a higher recognition rate can be got by using the electrode sensor array, and the improvement is 5% for suspension flow, 9% for laminar flow and 13% for dense-dilute flow.
{"title":"Gas-solid Flow Patterns Identification Based on Artificial Neural Network","authors":"F. Fu, Shimin Wang","doi":"10.1145/3208854.3208892","DOIUrl":"https://doi.org/10.1145/3208854.3208892","url":null,"abstract":"Flow patterns identification of the gas--solid flow in pneumatic transport pipelines is significant for the optimized design and operation of the pneumatic conveying system. The objective of this work is to training an Artificial Neural Network(ANN) to identify flow patterns (suspension flow, laminar flow, dense-dilute flow and dune flow) of the gas-solid flow in a horizontal pneumatic conveying pipeline. The performance of the ANN models was evaluated respectively using Hurst exponent of a ring-shaped electrode's output signal and Hurst exponent matrix of an electrostatic sensor array's output signals. Results show a higher recognition rate can be got by using the electrode sensor array, and the improvement is 5% for suspension flow, 9% for laminar flow and 13% for dense-dilute flow.","PeriodicalId":365707,"journal":{"name":"IEEA '18","volume":"64 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121603460","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
R. Tian, Dabiao Wang, Yue Zhang, Yuezheng Ma, Hui Li, Lin Shi
Supercritical Organic Rankine Cycle (ORC) is a promising technology to convert the renewable energy and waste heat into power. This paper focused on the diameter size effect on the heat transfer characteristics of supercritical pressure R134a in horizontal tubes, aiming to provide guidance for the vapor generator design in ORC systems. Heat transfer experiments were conducted in two tubes with different inner diameters of 10.3 mm and 16 mm. Results showed that the heat transfer deterioration on the top surface is more serious with larger tube diameter. Heat transfer mechanisms were studied by analysing the buoyancy effect, thermal acceleration effect and the property variation effect quantitatively with various dimensionless numbers. The tube diameter size significantly affects the buoyancy effect in horizontal tubes. A larger tube diameter leads to stronger buoyancy effect and weaker thermal acceleration effect. However, the tube diameter size seems to have no effect on the radial property variations.
{"title":"Tube Diameter Size Effects on Heat Transfer of Supercritical R134a in Horizontal Tubes for Vapor Generator Design in Organic Rankine Cycles","authors":"R. Tian, Dabiao Wang, Yue Zhang, Yuezheng Ma, Hui Li, Lin Shi","doi":"10.1145/3208854.3208873","DOIUrl":"https://doi.org/10.1145/3208854.3208873","url":null,"abstract":"Supercritical Organic Rankine Cycle (ORC) is a promising technology to convert the renewable energy and waste heat into power. This paper focused on the diameter size effect on the heat transfer characteristics of supercritical pressure R134a in horizontal tubes, aiming to provide guidance for the vapor generator design in ORC systems. Heat transfer experiments were conducted in two tubes with different inner diameters of 10.3 mm and 16 mm. Results showed that the heat transfer deterioration on the top surface is more serious with larger tube diameter. Heat transfer mechanisms were studied by analysing the buoyancy effect, thermal acceleration effect and the property variation effect quantitatively with various dimensionless numbers. The tube diameter size significantly affects the buoyancy effect in horizontal tubes. A larger tube diameter leads to stronger buoyancy effect and weaker thermal acceleration effect. However, the tube diameter size seems to have no effect on the radial property variations.","PeriodicalId":365707,"journal":{"name":"IEEA '18","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123976994","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The energy consumption is increased very rapidly day by bay. Air pollution and global greenhouse effect become very serious. Therefore, the energy saving management plays an important role today. The air conditioning is necessary for both family and industry in many places, especially in Taiwan. Usually, the total energy consumption of air conditioning is over 10% of the total energy consumption of Taiwan. To enhance the efficiency of air conditioning and to save energy is very important. In this paper, an effective energy saving design for air conditioning system is developed. Based on the experiment results, this design has better quality, higher efficiency, and lower cost. It can save about 30% of energy by using this design.
{"title":"An Effective Energy Saving Design for Air Conditioning Systems","authors":"Tung-Ming Liang, Yi-Nung Chung","doi":"10.1145/3208854.3208874","DOIUrl":"https://doi.org/10.1145/3208854.3208874","url":null,"abstract":"The energy consumption is increased very rapidly day by bay. Air pollution and global greenhouse effect become very serious. Therefore, the energy saving management plays an important role today. The air conditioning is necessary for both family and industry in many places, especially in Taiwan. Usually, the total energy consumption of air conditioning is over 10% of the total energy consumption of Taiwan. To enhance the efficiency of air conditioning and to save energy is very important. In this paper, an effective energy saving design for air conditioning system is developed. Based on the experiment results, this design has better quality, higher efficiency, and lower cost. It can save about 30% of energy by using this design.","PeriodicalId":365707,"journal":{"name":"IEEA '18","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125230858","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
In order to further explore the autonomous air combat tactical movement of unmanned combat aircraft, a layered tactical action recognition scheme based on fuzzy logic reasoning and time matching principle is proposed. This scheme connects the basic action identification layer and the composite action identification layer with the basic action sequence. Firstly, the basic motion is identified by fuzzy logic inference method, and the results of the recognition are output in the form of basic action sequences. Then, the combined action identification layer is entered, and the combination action pattern and the combined action matching library are matched to determine the type of combined action. The simulation results show that the layered tactical action recognition scheme can effectively identify the autonomous air combat tactical action of unmanned combat aircraft, and have good extensibility.
{"title":"The Hierarchical Recognition Method of Autonomous Air Tactical Operation of Unmanned Combat Aircraft","authors":"Kexin Zhao, Changqiang Huang","doi":"10.1145/3208854.3208878","DOIUrl":"https://doi.org/10.1145/3208854.3208878","url":null,"abstract":"In order to further explore the autonomous air combat tactical movement of unmanned combat aircraft, a layered tactical action recognition scheme based on fuzzy logic reasoning and time matching principle is proposed. This scheme connects the basic action identification layer and the composite action identification layer with the basic action sequence. Firstly, the basic motion is identified by fuzzy logic inference method, and the results of the recognition are output in the form of basic action sequences. Then, the combined action identification layer is entered, and the combination action pattern and the combined action matching library are matched to determine the type of combined action. The simulation results show that the layered tactical action recognition scheme can effectively identify the autonomous air combat tactical action of unmanned combat aircraft, and have good extensibility.","PeriodicalId":365707,"journal":{"name":"IEEA '18","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129245818","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
D. Tang, Bei Li, Anqi Lei, Shang-yu Huang, Wei Liu, Hanxing Liu
In this work, molecular dynamics (MD) simulation was performed to investigate the nano-mechanics (i.e., compression and tension processes) of confined ultrathin perfluoropolyether (PFPE) lubricant films at near-contact head disk interface. During compression process, the lubricant film would transfer to the slider even before a full contact occurs; while during tension process, an apparent fluid bridge was observed. The entangled lubricant chains are gradually straightened until the film breaks apart into two parts in the nearly end of the tension process. The normal stress profiles of PFPEs were also evaluated in the two processes, in which the hypothesis phenomenon indicates the irreversible nature of the nano-mechanics of PFPEs.
{"title":"Computational Studies of Nano-Mechanics of Ultrathin Perfluoropolyether Films","authors":"D. Tang, Bei Li, Anqi Lei, Shang-yu Huang, Wei Liu, Hanxing Liu","doi":"10.1145/3208854.3208879","DOIUrl":"https://doi.org/10.1145/3208854.3208879","url":null,"abstract":"In this work, molecular dynamics (MD) simulation was performed to investigate the nano-mechanics (i.e., compression and tension processes) of confined ultrathin perfluoropolyether (PFPE) lubricant films at near-contact head disk interface. During compression process, the lubricant film would transfer to the slider even before a full contact occurs; while during tension process, an apparent fluid bridge was observed. The entangled lubricant chains are gradually straightened until the film breaks apart into two parts in the nearly end of the tension process. The normal stress profiles of PFPEs were also evaluated in the two processes, in which the hypothesis phenomenon indicates the irreversible nature of the nano-mechanics of PFPEs.","PeriodicalId":365707,"journal":{"name":"IEEA '18","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128969468","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Coal has been the predominant source of energy for electricity production in South Africa. Coal combustion process for energy recovery is regarded as heavy pollutant emissions process. Waste derived alternative fuels are widely used for substituting the thermal energy requirement from fossil fuels and reducing the pollutant emission. This paper is a comparison between the burning of coal and RDF as far as fuel qualities and emissions. The ignition of fuel derived from MSW is a promising low-cost retrofitting procedure for coal power plants, having the additional advantage of lessening the volume of waste transfer in landfills. Moreover, co-burning of RDF and coal, as opposed to changing to RDF ignition alone straight from the onset of devoted power plants, permits plant administrators to be adaptable to varieties in the RDF supply.
{"title":"Environmental Emissions Assessment of Coal and Refuse Derived Fuel Incineration Processes by Simulation","authors":"O. A. Osibote, A. Hlaba, A. Rabiu","doi":"10.1145/3208854.3208870","DOIUrl":"https://doi.org/10.1145/3208854.3208870","url":null,"abstract":"Coal has been the predominant source of energy for electricity production in South Africa. Coal combustion process for energy recovery is regarded as heavy pollutant emissions process. Waste derived alternative fuels are widely used for substituting the thermal energy requirement from fossil fuels and reducing the pollutant emission. This paper is a comparison between the burning of coal and RDF as far as fuel qualities and emissions. The ignition of fuel derived from MSW is a promising low-cost retrofitting procedure for coal power plants, having the additional advantage of lessening the volume of waste transfer in landfills. Moreover, co-burning of RDF and coal, as opposed to changing to RDF ignition alone straight from the onset of devoted power plants, permits plant administrators to be adaptable to varieties in the RDF supply.","PeriodicalId":365707,"journal":{"name":"IEEA '18","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132698030","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
This paper emphasizes on the fatigue analysis of 500W turgo impulse turbine blade by using numerical approach method to improve the quality of turbine blade. Solidwork software is used for designing turbine blade and ANSYS 16.2 ncode design life software is used for simulation fatigue. Life, damage, total deformation and Von Mises stresses are analyzed to estimate the stresses occurring places where turbine blade can bear for better design results. Stainless steel, aluminium, and gray cast iron are applied for bucket materials to measure the better result for turbine. Blade design is developed by hand calculation to get better efficiency and turbine performance.
{"title":"Design Optimization and Fatigue Analysis of Turgo Impulse Blade","authors":"Jiqing Li, May Myat Moe Saw","doi":"10.1145/3208854.3208895","DOIUrl":"https://doi.org/10.1145/3208854.3208895","url":null,"abstract":"This paper emphasizes on the fatigue analysis of 500W turgo impulse turbine blade by using numerical approach method to improve the quality of turbine blade. Solidwork software is used for designing turbine blade and ANSYS 16.2 ncode design life software is used for simulation fatigue. Life, damage, total deformation and Von Mises stresses are analyzed to estimate the stresses occurring places where turbine blade can bear for better design results. Stainless steel, aluminium, and gray cast iron are applied for bucket materials to measure the better result for turbine. Blade design is developed by hand calculation to get better efficiency and turbine performance.","PeriodicalId":365707,"journal":{"name":"IEEA '18","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130686430","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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