Alternatives to the sectoral and public policies and regulations of environmental and water resources＇ protection, and the experiments of integrated management have been rapidly multiplied since the year 1990. Water ...Alternatives to the sectoral and public policies and regulations of environmental and water resources＇ protection, and the experiments of integrated management have been rapidly multiplied since the year 1990. Water constitutes a principal stake of these environmental policies in the majority of the countries and especially in the countries of North Africa as Algeria, where this resource is threatened by repeated dryness and by the impact of the climate change. The integrated water resource management reflects today the world tendency of the governments to exploit and preserve this resource by a way based on a process of governance, which passes by the dialog of diversified actors （various sectors）. According to this policy and to the promulgation of the Algerian National Report on State effective implementation and coordination mechanisms are required. How this principle of integrated water management will be executed with various scenarios in Algeria and what are the main difficulties that can be met？ Or, more exactly, what are the variables that can influence the operation of the local water process governorship？ This analysis will be carried out through the example of the Wadi El K6bir watershed located in the northeast of Algeria, which is real natural area of water supply that feeds the communities, the natural and artificial basins, and preserves the perenniality of the existing natural ecosystems especially the one of the natural park classified by the United Nations Educational Scientific and Cultural Organization （U.N.E.S.C.O） in 1989 as the inheritance of humanity and six other sites classified according to the Ramsar convention as wetlands of international importance to be preserved.展开更多
Background: The Poisson and the Negative Binomial distributions are commonly used to model count data. The Poisson is characterized by the equality of mean and variance whereas the Negative Binomial has a variance lar...Background: The Poisson and the Negative Binomial distributions are commonly used to model count data. The Poisson is characterized by the equality of mean and variance whereas the Negative Binomial has a variance larger than the mean and therefore both models are appropriate to model over-dispersed count data. Objectives: A new two-parameter probability distribution called the Quasi-Negative Binomial Distribution (QNBD) is being studied in this paper, generalizing the well-known negative binomial distribution. This model turns out to be quite flexible for analyzing count data. Our main objectives are to estimate the parameters of the proposed distribution and to discuss its applicability to genetics data. As an application, we demonstrate that the QNBD regression representation is utilized to model genomics data sets. Results: The new distribution is shown to provide a good fit with respect to the “Akaike Information Criterion”, AIC, considered a measure of model goodness of fit. The proposed distribution may serve as a viable alternative to other distributions available in the literature for modeling count data exhibiting overdispersion, arising in various fields of scientific investigation such as genomics and biomedicine.展开更多
This paper addresses the energy conservation challenge in metro systems during the first service period,characterized by large train headways and low passenger demands.A novel train timetabling method incorporating an...This paper addresses the energy conservation challenge in metro systems during the first service period,characterized by large train headways and low passenger demands.A novel train timetabling method incorporating an express-local mode is proposed to maximize the overlap time between accelerating and braking trains,thereby facilitating the utiliza-tion of regenerative braking energy(RBE).Local and express trains depart alternately,with skip-stop strategies implemented for express trains.Considering the interests of operators and passengers for energy and travel time savings,a bi-objective model is proposed to jointly optimize train timetable and stopping plan.The non-dominated sorting genetic algorithm II(NSGA-II)is applied to solve the model and obtain Pareto optimal solutions.Numerical experiments based on Ningbo Metro Line 1 data validate the effectiveness of proposed methods,showcasing significant enhancement in RBE utilization and notable reduction in passenger travel time.The proposed express-local mode establishes stable tracking relationships within train pairs,ensuring effective RBE utilization.Comparative analyses reveal that deadheading is more effective than flexible skip-stop for energy-efficient and time-saving metro operations.展开更多
Random needle embroidery(RNE) is a graceful art enrolled in the world intangible cultural heritage. In this paper, we study the stitch layout problem and propose a controllable stitch layout strategy for RNE. Using ou...Random needle embroidery(RNE) is a graceful art enrolled in the world intangible cultural heritage. In this paper, we study the stitch layout problem and propose a controllable stitch layout strategy for RNE. Using our method, a user can easily change the layout styles by adjusting several high-level layout parameters. This approach has three main features: firstly, a stitch layout rule containing low-level stitch attributes and high-level layout parameters is designed; secondly, a stitch neighborhood graph is built for each region to model the spatial relationship among stitches; thirdly, different stitch attributes(orientations, lengths, and colors) are controlled using different reaction-diffusion processes based on a stitch neighborhood graph. Moreover, our method supports the user in changing the stitch orientation layout by drawing guide curves interactively. The experimental results show its capability for reflecting various stitch layout styles and flexibility for user interaction.展开更多
文摘Alternatives to the sectoral and public policies and regulations of environmental and water resources＇ protection, and the experiments of integrated management have been rapidly multiplied since the year 1990. Water constitutes a principal stake of these environmental policies in the majority of the countries and especially in the countries of North Africa as Algeria, where this resource is threatened by repeated dryness and by the impact of the climate change. The integrated water resource management reflects today the world tendency of the governments to exploit and preserve this resource by a way based on a process of governance, which passes by the dialog of diversified actors （various sectors）. According to this policy and to the promulgation of the Algerian National Report on State effective implementation and coordination mechanisms are required. How this principle of integrated water management will be executed with various scenarios in Algeria and what are the main difficulties that can be met？ Or, more exactly, what are the variables that can influence the operation of the local water process governorship？ This analysis will be carried out through the example of the Wadi El K6bir watershed located in the northeast of Algeria, which is real natural area of water supply that feeds the communities, the natural and artificial basins, and preserves the perenniality of the existing natural ecosystems especially the one of the natural park classified by the United Nations Educational Scientific and Cultural Organization （U.N.E.S.C.O） in 1989 as the inheritance of humanity and six other sites classified according to the Ramsar convention as wetlands of international importance to be preserved.
文摘Background: The Poisson and the Negative Binomial distributions are commonly used to model count data. The Poisson is characterized by the equality of mean and variance whereas the Negative Binomial has a variance larger than the mean and therefore both models are appropriate to model over-dispersed count data. Objectives: A new two-parameter probability distribution called the Quasi-Negative Binomial Distribution (QNBD) is being studied in this paper, generalizing the well-known negative binomial distribution. This model turns out to be quite flexible for analyzing count data. Our main objectives are to estimate the parameters of the proposed distribution and to discuss its applicability to genetics data. As an application, we demonstrate that the QNBD regression representation is utilized to model genomics data sets. Results: The new distribution is shown to provide a good fit with respect to the “Akaike Information Criterion”, AIC, considered a measure of model goodness of fit. The proposed distribution may serve as a viable alternative to other distributions available in the literature for modeling count data exhibiting overdispersion, arising in various fields of scientific investigation such as genomics and biomedicine.
基金funded by the Natural Science Foundation of Zhejiang Province,China(No.LY21E080008)the Natural Science Foundation of Ningbo of China(No.202003N4146)the National Natural Science Foundation of China(No.51408323).
文摘This paper addresses the energy conservation challenge in metro systems during the first service period,characterized by large train headways and low passenger demands.A novel train timetabling method incorporating an express-local mode is proposed to maximize the overlap time between accelerating and braking trains,thereby facilitating the utiliza-tion of regenerative braking energy(RBE).Local and express trains depart alternately,with skip-stop strategies implemented for express trains.Considering the interests of operators and passengers for energy and travel time savings,a bi-objective model is proposed to jointly optimize train timetable and stopping plan.The non-dominated sorting genetic algorithm II(NSGA-II)is applied to solve the model and obtain Pareto optimal solutions.Numerical experiments based on Ningbo Metro Line 1 data validate the effectiveness of proposed methods,showcasing significant enhancement in RBE utilization and notable reduction in passenger travel time.The proposed express-local mode establishes stable tracking relationships within train pairs,ensuring effective RBE utilization.Comparative analyses reveal that deadheading is more effective than flexible skip-stop for energy-efficient and time-saving metro operations.
基金Project supported by the National Natural Science Foundation of China(Nos.61272219,61100110,and 61321491)the National High-Tech R&D Program(863)of China(No.2007AA01Z334)+3 种基金the Key Projects Innovation Fund of State Key Laboratory(No.ZZKT2013A12)the Program for New Century Excellent Talents in Universities,China(No.NCET04-04605)the Science and Technology Program of Jiangsu Province(Nos.BE2010072,BE2011058,and BY2012190)the Scientific Research Foundation of Graduate School of Nanjing University(No.2012CL21),China
文摘Random needle embroidery(RNE) is a graceful art enrolled in the world intangible cultural heritage. In this paper, we study the stitch layout problem and propose a controllable stitch layout strategy for RNE. Using our method, a user can easily change the layout styles by adjusting several high-level layout parameters. This approach has three main features: firstly, a stitch layout rule containing low-level stitch attributes and high-level layout parameters is designed; secondly, a stitch neighborhood graph is built for each region to model the spatial relationship among stitches; thirdly, different stitch attributes(orientations, lengths, and colors) are controlled using different reaction-diffusion processes based on a stitch neighborhood graph. Moreover, our method supports the user in changing the stitch orientation layout by drawing guide curves interactively. The experimental results show its capability for reflecting various stitch layout styles and flexibility for user interaction.
