A new travel time reliability-based traffic assignment model is proposed to investigate the effects of an advanced transportation information system (ATIS) on drivers' risk-taking path choice behaviours in transpo...A new travel time reliability-based traffic assignment model is proposed to investigate the effects of an advanced transportation information system (ATIS) on drivers' risk-taking path choice behaviours in transportation networks with demand uncertainty. In the model, drivers are divided into two classes. The first class is not equipped with ATIS, while the second class is equipped with ATIS. Different risk-taking path choice behaviours of the two classes are studied, respectively. A corresponding mixed equilibrium traffic assignment model is formulated as a variational inequality problem in terms of path flows, which is solved by a heuristic solution algorithm. Numerical results indicate that the ATIS can influence the drivers' risk-taking path choice behaviours and the total system travel time in transportation networks with demand uncertainty. It is also found that under higher demand levels, the benefits of ATIS for network performance enhancement may be more obvious.展开更多
Due to the rigorous fiscal terms and huge potential risk of risk service contracts,optimizing oil production paths is one of the main challenges in designing oilfield development plans.In this paper,an oil production ...Due to the rigorous fiscal terms and huge potential risk of risk service contracts,optimizing oil production paths is one of the main challenges in designing oilfield development plans.In this paper,an oil production path optimization model is developed to maximize economic benefits within constraints of technology factors and oil contracts.This analysis describes the effects of risk service contract terms on parameters of inputs and outputs and quantifies the relationships between production and production time,revenues,investment and costs.An oil service development and production project is illustrated in which the optimal production path under its own geological conditions and contract terms is calculated.The influences of oil price,service fees per barrel and operating costs on the optimal production have been examined by sensitivity analysis.The results show that the oil price has the largest impact on the optimal production,which is negatively related to oil price and positively related to service fees per barrel and operating costs.展开更多
It may be difcult for existing methods to make full use of the correlation and complementarity of various kinds of information when processing multi-source information.In order to accurately perceive the security situ...It may be difcult for existing methods to make full use of the correlation and complementarity of various kinds of information when processing multi-source information.In order to accurately perceive the security situation of distribution automation and ensure the safe and stable operation of distribution network,the multi-source information fusion distribution automation security situation awareness technology based on risk transmission path is studied.Based on the risk transmission path,the distribution automation security situational awareness factors are analyzed,and the main factors afecting the distribution automation security situation are divided into two dimensions:internal source and external source,and eight main awareness factors;Diferent types of sensors are set in the main areas of security situational awareness factors to collect data of diferent awareness factors.Using ant colony algorithm to optimize DS evidence fusion method,data with diferent perception factors are fused,and data fusion results with diferent perception factors are obtained.The distribution automation security situational awareness model is constructed,and the security situational awareness results are obtained based on the data fusion results of the awareness factors.If the results are higher than the set threshold,the abnormal signal can be output to determine the area where the distribution automation abnormal equipment is located.The experimental results show that the multi-source data fusion efect of this method is good,and it can accurately perceive the security status of diferent nodes of the experimental object at diferent time nodes.展开更多
During the construction of earth-rock dam,mutual exclusive construction goals such as quality,safety,progress and cost all have influences on each other,with risk factors being everchanging as the construction progres...During the construction of earth-rock dam,mutual exclusive construction goals such as quality,safety,progress and cost all have influences on each other,with risk factors being everchanging as the construction progresses.Accurate identification of the risk factors,as well as clearing any possible effect that any risk factors might have on the construction project is the key and foundation to our cooperative control of the construction goals.According to the construction planning of earth-rock dam,the hall3 D structure was used to identify the potential changes of risk factors,and the possible means of any risk factors to interfere with the construction goals.The dynamic risk assessment index system is established by deploying the WBS-RBS(work breakdown structurerisk breakdown structure)method,aiming at the construction goals of earth-rock dam.The case study shows that the index system is very effective at risk management of earth-rock dam during construction,and relatively practicable.展开更多
Liquor-making industry has stepped into the depths strategic transformation and faced more complex and versatile macro situation in recent years, which means that economy integration was accelerated, the spread of inf...Liquor-making industry has stepped into the depths strategic transformation and faced more complex and versatile macro situation in recent years, which means that economy integration was accelerated, the spread of information technology sped up, consumer demand for products became complex and sophisticated, and product life cycle was shortened. The theory of "Internet +" highlights new turn in the strategic transformation of liquor-making industry. This paper, under the background of "Internet +", analyzes the existing situations of liquor-making industry, provides transition routes of strategic transformation in liquor-making industry, and gives prevention against transformation risks.展开更多
基金The National High Technology Research and Development Program of China (863 Program) (No.2006AA11Z209)Youth Science and Technology Foundation of China University of Mining and Technology (No.2007A028)Natural Science Foundation of Beijing (No.9073018)
文摘A new travel time reliability-based traffic assignment model is proposed to investigate the effects of an advanced transportation information system (ATIS) on drivers' risk-taking path choice behaviours in transportation networks with demand uncertainty. In the model, drivers are divided into two classes. The first class is not equipped with ATIS, while the second class is equipped with ATIS. Different risk-taking path choice behaviours of the two classes are studied, respectively. A corresponding mixed equilibrium traffic assignment model is formulated as a variational inequality problem in terms of path flows, which is solved by a heuristic solution algorithm. Numerical results indicate that the ATIS can influence the drivers' risk-taking path choice behaviours and the total system travel time in transportation networks with demand uncertainty. It is also found that under higher demand levels, the benefits of ATIS for network performance enhancement may be more obvious.
基金Funding for this work was provided by the Major Project from the National Social Science Foundation of China through research on replacement strategies for overseas oil and gas resources based on the perspective of China’s petroleum security under the project number 11&ZD164
文摘Due to the rigorous fiscal terms and huge potential risk of risk service contracts,optimizing oil production paths is one of the main challenges in designing oilfield development plans.In this paper,an oil production path optimization model is developed to maximize economic benefits within constraints of technology factors and oil contracts.This analysis describes the effects of risk service contract terms on parameters of inputs and outputs and quantifies the relationships between production and production time,revenues,investment and costs.An oil service development and production project is illustrated in which the optimal production path under its own geological conditions and contract terms is calculated.The influences of oil price,service fees per barrel and operating costs on the optimal production have been examined by sensitivity analysis.The results show that the oil price has the largest impact on the optimal production,which is negatively related to oil price and positively related to service fees per barrel and operating costs.
基金supported by Innovation and innovation project of State Grid Qinghai Electric Power Company"Development and application of the Reactive Power Compensation Intelligent Control Device based on Automatic Synchronous Control"(No.B7280723E028).
文摘It may be difcult for existing methods to make full use of the correlation and complementarity of various kinds of information when processing multi-source information.In order to accurately perceive the security situation of distribution automation and ensure the safe and stable operation of distribution network,the multi-source information fusion distribution automation security situation awareness technology based on risk transmission path is studied.Based on the risk transmission path,the distribution automation security situational awareness factors are analyzed,and the main factors afecting the distribution automation security situation are divided into two dimensions:internal source and external source,and eight main awareness factors;Diferent types of sensors are set in the main areas of security situational awareness factors to collect data of diferent awareness factors.Using ant colony algorithm to optimize DS evidence fusion method,data with diferent perception factors are fused,and data fusion results with diferent perception factors are obtained.The distribution automation security situational awareness model is constructed,and the security situational awareness results are obtained based on the data fusion results of the awareness factors.If the results are higher than the set threshold,the abnormal signal can be output to determine the area where the distribution automation abnormal equipment is located.The experimental results show that the multi-source data fusion efect of this method is good,and it can accurately perceive the security status of diferent nodes of the experimental object at diferent time nodes.
基金National Natural Science Foundation of China(No.51379192)
文摘During the construction of earth-rock dam,mutual exclusive construction goals such as quality,safety,progress and cost all have influences on each other,with risk factors being everchanging as the construction progresses.Accurate identification of the risk factors,as well as clearing any possible effect that any risk factors might have on the construction project is the key and foundation to our cooperative control of the construction goals.According to the construction planning of earth-rock dam,the hall3 D structure was used to identify the potential changes of risk factors,and the possible means of any risk factors to interfere with the construction goals.The dynamic risk assessment index system is established by deploying the WBS-RBS(work breakdown structurerisk breakdown structure)method,aiming at the construction goals of earth-rock dam.The case study shows that the index system is very effective at risk management of earth-rock dam during construction,and relatively practicable.
文摘Liquor-making industry has stepped into the depths strategic transformation and faced more complex and versatile macro situation in recent years, which means that economy integration was accelerated, the spread of information technology sped up, consumer demand for products became complex and sophisticated, and product life cycle was shortened. The theory of "Internet +" highlights new turn in the strategic transformation of liquor-making industry. This paper, under the background of "Internet +", analyzes the existing situations of liquor-making industry, provides transition routes of strategic transformation in liquor-making industry, and gives prevention against transformation risks.
