spatial objectives
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Author(s):  
Al-Ibadi Zeyad, Et. al.

In this work, different spectra processing methods are affected by the principal components (Aromatic compounds). Keeping up high-spatial objectives is progressively basic, Various methodologies are utilized to check fragrant compounds that anticipate choosing a specific technique that's amid research Center determinations. These techniques empower us to assess a particular degree of normal compounds, much the same as benzene, toluene and xylene, and so on. One notable part of all types of signal systems is the flexibility of adaptation. And spatial exactness isn't fundamental to get a range from an expansive number of fragrant compounds where more prominent characterization and statistical mean are more critical. Moreover, sufficiently low deviations of the expected values were achieved from the true values. The standard deviation, to determine the properties of fragrant compounds and compare them with normal compounds isn't thorough. A persistent baseline rectification was performed; after that, the rectified spectrum was normalized to their area and somewhat smoothed. The autofluorescence foundation was subtracted, for the pure range analysis, by utilizing scientific approaches: polynomial estimation (PolyFit) and (method Processors Gases Improved). The accuracy obtained is not extreme and can be increased by developing algorithms and selecting other parameters. It is also possible to increase the accuracy and reliability of this method by improving the quality of the training sample by eliminating the unwanted data that we have obtained, by increasing the sample size, and by studying more in detail the sample data to eliminate inaccuracies that arise during the transition between concentrations Gas.


Algorithms ◽  
2020 ◽  
Vol 13 (1) ◽  
pp. 16 ◽  
Author(s):  
Olive Niyomubyeyi ◽  
Tome Eduardo Sicuaio ◽  
José Ignacio Díaz González ◽  
Petter Pilesjö ◽  
Ali Mansourian

Evacuation planning is an important activity in disaster management to reduce the effects of disasters on urban communities. It is regarded as a multi-objective optimization problem that involves conflicting spatial objectives and constraints in a decision-making process. Such problems are difficult to solve by traditional methods. However, metaheuristics methods have been shown to be proper solutions. Well-known classical metaheuristic algorithms—such as simulated annealing (SA), artificial bee colony (ABC), standard particle swarm optimization (SPSO), genetic algorithm (GA), and multi-objective versions of them—have been used in the spatial optimization domain. However, few types of research have applied these classical methods, and their performance has not always been well evaluated, specifically not on evacuation planning problems. This research applies the multi-objective versions of four classical metaheuristic algorithms (AMOSA, MOABC, NSGA-II, and MSPSO) on an urban evacuation problem in Rwanda in order to compare the performances of the four algorithms. The performances of the algorithms have been evaluated based on the effectiveness, efficiency, repeatability, and computational time of each algorithm. The results showed that in terms of effectiveness, AMOSA and MOABC achieve good quality solutions that satisfy the objective functions. NSGA-II and MSPSO showed third and fourth-best effectiveness. For efficiency, NSGA-II is the fastest algorithm in terms of execution time and convergence speed followed by AMOSA, MOABC, and MSPSO. AMOSA, MOABC, and MSPSO showed a high level of repeatability compared to NSGA-II. It seems that by modifying MOABC and increasing its effectiveness, it could be a proper algorithm for evacuation planning.


2018 ◽  
Vol 18 (4) ◽  
pp. 333-351
Author(s):  
Jiří Novosák ◽  
Jana Novosáková ◽  
Oldřich Hájek ◽  
Jiří Koleňák

Abstract The purpose of the present paper is to find whether the spatial distribution of enterprise support policy funds meet the spatial objectives stated in Czech strategic documents related to enterprise support policy. Are more funds allocated in lagging regions, and does enterprise support policy contribute more to the convergence objective, or are more funds allocated in core regions, and does enterprise support policy contribute more to the competitiveness objective? These questions are answered by evaluating the Structural (and Cohesion) Fund (SF) expenditures that were allocated on operations categorised as part of enterprise support policy (2007-2013). The dependent variable relates to 206 regions, and SF expenditures are calculated for every inhabitant of a region. Moreover, two types of SF operation are distinguished: (a) innovationoriented operations; and (b) other enterprise support operations. Three explanatory variables are defined using Principal Components Analysis (PCA), and these components are understood as: (1) the social disadvantage of regions; (2) the innovation environment of regions; and (3) the quality of regional entrepreneurial environments. The associations between the dependent and explanatory variables are subsequently evaluated by methods of correlation and regression analysis. The findings provide some evidence for both the convergence and competitiveness objectives. Nevertheless, this evidence is rather limited due to a low spatial concentration of SF allocation, and the compensatory effect between the two thematic types of SF operations. Hence, while the quality of their innovation environment has a positive influence on regional SF allocation regardless of the thematic focus of SF operations, socially disadvantaged regions received more funds for SF operations which are not innovation-oriented. The capacity of potential beneficiaries to prepare and submit many project proposals for SF co-financing is the main reason for high or low SF allocation.


2015 ◽  
Vol 44 (7) ◽  
pp. 701001 ◽  
Author(s):  
卫沛锋 WEI Pei-feng ◽  
卢振武 LU Zhen-wu ◽  
刘欣悦 LIU Xin-yue ◽  
林旭东 LIN Xu-dong ◽  
王亮 WANG Liang ◽  
...  

2000 ◽  
Author(s):  
Frank R. Schaefer ◽  
Marc Ramsey ◽  
Imtiaz Haque ◽  
Jürgen Schuller

Abstract This paper addresses target point search methods for course following systems. A central concept in the development of the control algorithms for such systems is that of target point selection. For a given driving situation, target points constitute spatial objectives that the control algorithm strives to realize. The results presented in this paper are based on experiments made with a recently developed new driver model [Schaefer and Schuller, 1999]. The model establishes control in two steps: geometric dynamic planning and plan-to-action mapping. The separation into these two units allows one to investigate the process of target point search independently. Target point search is conducted for the guidance of a vehicle’s c.g., i.e. a system thats trajectory can be assumed to have ‘differentiable’ curvature profile. The concepts introduced here, however, may easily be generalized to any system whose state transition (i.e. trajectory) may be described locally by instantaneous circles and that has to follow an abstract nominal path in the state space. A so called situational driving motivation ‘SDM’ is formulated that defines a clear guideline for geometric dynamic planning based on an time isolated situation. A number of different search methods including Preview Point Search, End of Sight Search, Deviation Dependent Preview Point, and a so-called Nestle Point Search, are investigated. The results are evaluated on the basis of the vehicle’s ability to go around a course with a minimum lateral deviation from the nominal course. The results show that the Nestle Curve Search method provides the best performance.


2000 ◽  
Vol 76 (2) ◽  
pp. 311-317 ◽  
Author(s):  
A. M. M. Nurullah ◽  
Glen A Jordan ◽  
Emin Zeki Baskent

This paper discusses the concept of spatial stratification (SS) as applied to forest modelling in general, and spatial forest modelling in particular. SS is a way of providing a geographically explicit forest description in forest modelling, or a way of accommodating spatially explicit management objectives and interventions. In the former, called a priori SS, stands of a forest landscape are spatially aggregated into a set of stand clusters which become input to forest modelling. The latter, called dynamic SS, utilizes stands as the input forest description upon which various spatial aggregations occur throughout forest modelling. Distinctions between the two alternative approaches are highlighted and implementation considerations are examined within the forest landscape management design context. The paper concludes that: (i) modelling techniques are directly linked to forest stratification approaches; and (ii) a priori stratification is seriously limited in spatial modelling for landscape management design where multiple and often conflicting spatial objectives exist. In view of these findings, the paper outlines an alternative spatial forest modelling approach using a combination of dynamic SS and heuristic optimization. Key words: spatial stratification, spatial forest modelling, heuristic optimization, forest management


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