Atmospheric environmental quality assessment method based on analytic hierarchy process

Lv, Wendai; Ji, Siping

doi:10.3934/dcdss.2019063

Cited by 9 publications

(7 citation statements)

References 38 publications

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“…In the system, the given problem is decomposed into multiple goals or standards, then categorized them as three levels, namely, multi-objective level, rules level, and constraints level. It is a systematic method of multiobjective decision making optimization to calculate the ranking order of each qualitative index in different levels, and the general principle level by means of fuzzy quantitative analysis, namely, AHP is used to calculate the weight coefficient of the index system (Lv and Ji 2018).…”

Section: Mathematical Modelmentioning

confidence: 99%

A research on urban eco-security evaluation and analysis: complex system’s brittle structure model

Liu

Zhong-hai

2020

Environ Sci Pollut Res

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Urban ecosystem has become a critical part of ecological security and draws much attention worldwide. It is both a result of natural ecological system development, and also an inevitable outcome of human ecological system development within a certain stage, with the objective of identifying the possible improvement space for unban ecological security evaluation from complex system perspective. Based on the brittle structure model and set pair theory, this paper firstly explored the main research methods of urban ecological security theory and its characteristics, then conducted a theory of complex system brittleness to analyze the urban ecological security brittle factors, brittle primitives, and brittle structure. Furthermore, it conducted a model of urban ecological system brittleness correlation entropy together with a set pair analysis method to discuss its brittleness. And finally, an ecological safety evaluation has been presented based on the empirical case in Chengdu City of China. The theoretical and empirical analysis shows that the brittle correlation entropy of natural subsystem in urban ecological security is the biggest one. The risks from natural subsystem collapse can easily trigger the brittleness of the entire urban system. The corresponding maximum brittle fluctuation entropy is from economic subsystem; it has a largest impact on the entropy change of urban ecosystem. The way of reducing the uncertainty of urban ecological risks is to lower difference degree coefficient in the system. Relevant decision makers should consider to reduce the increasing degree of entropy and eliminate the fluctuation of the brittle factors. Thus, the threats or risks of urban ecological system can be within the acceptable range and under control. An integrated system management combing with brittleness characters of natural, economics, and social subsystem is necessary. It is helpful for the ecological security construction.

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Section: Mathematical Modelmentioning

confidence: 99%

A research on urban eco-security evaluation and analysis: complex system’s brittle structure model

Liu

Zhong-hai

2020

Environ Sci Pollut Res

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“…The rural landscape is usually defined as the landscape outside a town, consisting of natural landscape and agricultural production [3]. It includes a variety of geological and geographic features such as cropland, forests, deserts, swamps, grasslands, pastures, rivers, and lakes [4].…”

Section: Introductionmentioning

confidence: 99%

“…It includes a variety of geological and geographic features such as cropland, forests, deserts, swamps, grasslands, pastures, rivers, and lakes [4]. The rural landscape is not only the earliest landscape that appeared but also the most distributed one in the world [3]. After a long period of natural evolution and human management practices, environmental and social factors have interacted with each other and led to all kinds of complex rural landscapes [5].…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Rural Landscape Resources Based on Cloud Model and Probabilistic Linguistic Term Set

Zhou

2022

Land

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Rural landscape resources are important ingredients of rural revitalization and modernization in developing countries and regions. Evaluation methods play a crucial role in the development planning, design, transformation, and protection of these resources. However, there has been a lack of research on the evaluation of rural landscape resources, especially from the perspective of rural revitalization. Based on previous evaluation methods and expert consultations on landscape planning and design, we proposed a new approach for evaluating rural landscape resources by establishing a new index system and using the Analytic Hierarchy Process (AHP) and probabilistic linguistic Cloud Model. To demonstrate its applicability and effectiveness, we applied our model to the case of a village (Xiapu) in Guangdong, China, determined the parameter set of its rural landscape resources, and obtained related results showing that the method is practical and can reflect the value of resources objectively and efficiently. Based on this model, further suggestions are provided to improve the design and other utilizations of rural landscape resources.

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“…In this paper, we address the control of a class of hybrid systems with switching linear dynamic equations depending on a discrete state, called mode, which is not fully accessible. For such systems, a novel observer-based control scheme is presented that is based a Luenberger observer and a mode predictor to estimate the continuous and discrete states, respectively, There exist many systems that result from the combination of smooth continuous dynamics and sudden switches (see, among others, [5,13,9,17,18]). Switching is modelled by means of hybrid automata with a discrete state that usually represents a specific operation mode of the plant.…”

mentioning

confidence: 99%

“…together with ( 3) and ( 4) since we suppose to have at disposal a mode prediction. From ( 3), ( 4), (17), and ( 18) it follows that…”

mentioning

confidence: 99%

Observer-based control for a class of hybrid linear and nonlinear systems

Alessandri

Bedouhene

Bouhadjra

et al. 2021

Discrete &Amp; Continuous Dynamical Systems - S

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An approach to output feedback control for hybrid discrete-time systems subject to uncertain mode transitions is proposed. The system dynamics may assume different modes upon the occurrence of a switching that is not directly measurable. Since the current system mode is unknown, a regulation scheme is proposed by combining a Luenberger observer to estimate the continuous state, a mode estimator, and a controller fed with the estimates of both continuous state variables and mode. The closed-loop stability is ensured under suitable conditions given in terms of linear matrix inequalities. Since complexity and conservativeness grow with the increase of the modes, we address the problem of reducing the number of linear matrix inequalities by providing more easily tractable stability conditions. Such conditions are extended to deal with systems having also Lipschitz nonlinearities and affected by disturbances. The effectiveness of the proposed approach is shown by means of simulations.

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Atmospheric environmental quality assessment method based on analytic hierarchy process

Cited by 9 publications

References 38 publications

A research on urban eco-security evaluation and analysis: complex system’s brittle structure model

A research on urban eco-security evaluation and analysis: complex system’s brittle structure model

Evaluation of Rural Landscape Resources Based on Cloud Model and Probabilistic Linguistic Term Set

Observer-based control for a class of hybrid linear and nonlinear systems

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