scholarly journals NOVO MÉTODO UPLOT-DAP PARA REPRESENTAÇÃO GRÁFICA DE DISTRIBUIÇÕES DIAMÉTRICAS

FLORESTA ◽  
2002 ◽  
Vol 32 (2) ◽  
Author(s):  
Ulisses Silva Da Cunha ◽  
Sebastião Do Amaral Machado ◽  
Afonso Figueiredo Filho ◽  
Roberto Tuyoshi Hosokawa
Keyword(s):  
Visual Analysis ◽  
Constant Width ◽  
Reference Value ◽  
New Method ◽  
Natural Forests ◽  
Class Interval ◽  
Support Tool ◽  
Diameter Structure ◽  
Exploratory Data ◽  
Diameter Classes

Foi apresentado um novo método gráfico denominado de UPLOT-DAP cuja finalidade é auxiliar a preparação de dados para interpretação visual ou análises sobre o comportamento de variáveis por classes diamétricas. A pesquisa objetivou desenvolver uma solução gráfica para a determinação das classes diamétricas. Para desenvolver e testar o método foram utilizados 28320 DAP com casca de árvores procedentes de 15 blocos de 96ha da Floresta Nacional do Tapajós, Belterra, Pará. O UPLOT-DAP é bastante flexível e utiliza-se de técnicas de análise visual de dados como forma de interpretação da dispersão dos diâmetros. Os gráficos foram construídos considerando uma amplitude de classe diamétrica de 10 cm adotada como valor de referência. Foram escolhidos 2 blocos com amplitudes em DAP (cm) representativas da população, bloco 18 [55,225] e bloco 25 [55,195] para discutir os resultados. O principal papel do novo método é evitar a construção equivocada de perfis diamétricos inexistentes ou diferentes da realidade. A eficiência do UPLOT-DAP baseia-se na sua capacidade de controlar a variação dos dados de modo que as análises sejam mais consistentes com os fatores físicos e biológicos que caracterizam a dinâmica de florestas naturais. Através do uso de UPLOT-DAP foi possível também mostrar que a tentativa de se fixar uma amplitude constante ou com variação constante crescente para os dados, pode resultar em conclusões duvidosas sobre a estrutura diamétrica da floresta. NEW METHOD “UPLOT-DAP” FOR GRAPHIC REPRESENTATION OF DIAMETER DISTRIBUTIONS Abstract This research presents a new method of exploratory data analysis for diameter classes in natural tropical forests by using the graph denominated UPLOT-DAP used as support tool in the construction of frequency histograms. The research aimed to develop a new graphic solution, different from the traditional methods, for the determination of the diameter classes. To develop and to test the new graphic method were used 28320 DBH outside bark coming from 15 blocks of 96 hectares of the National Forest of Tapajós, Belterra, Pará, Brazil. The new method is quite flexible and essentially practical consisting in the use of visual analysis techniques of data as a way of diameters dispersion interpretation. The graphs were built considering a diameter class interval of 10 cm adopted as reference value. Two blocks were chosen with DBH (cm) representative range of the population, block 18 [55,225] and block 25 [55,195] to discuss the results. The outcoming of the new method is to avoid the mistakes in constructing inexistent diameter profiles or different from the reality. The efficiency of the new method is based on its capacity to control the variation of the data so that the analysis are more consistent with the physical and biological factors that characterize the dynamics of natural forests. The method also showed that the attempt of establishing a constant width or with a growing constant variation for the data, it can result in biased conclusions on the diameter structure of the forest.

A Reformative Simulation Method of Motor Pole Core Vibration Characteristics

2013 ◽  
Vol 331 ◽  
pp. 118-123
Author(s):  
Tian Hui Ding ◽  
Yun Hua Chen ◽  
Lei Tian
Keyword(s):  
Reference Value ◽  
Simulation Method ◽  
Vibration Characteristics ◽  
New Method ◽  
Motor Design ◽  
Simulation Results ◽  
Vibration Performance

As to directing motor design, it is very important to make sure that the motor’s forecast of vibration performance has reference value. So, it must need motor’s parts vibration characteristics simulation results are so close to their characteristics. This paper puts forward a new simulation method of motor pole core vibration characteristics, this method includes setting anisotropy material attributes multipartite, getting attributes parameters values which are based on recommended fitting curves, modeling and equating windings, equating dipping lacquer and so on. Combining with experiments, the new method is validated its availability.

scholarly journals The possibilities of using group regression in the analysis of the diameter structure development in selection forests of Tara

2002 ◽  
pp. 79-89 ◽  
Author(s):  
Slobodanka Mitrovic ◽  
Stanisa Bankovic
Keyword(s):  
Mathematical Model ◽  
Future Development ◽  
Functional Dependence ◽  
Primary Objective ◽  
Structure Development ◽  
Study Results ◽  
The Future ◽  
Diameter Structure ◽  
Group Regression ◽  
Diameter Classes

Based on the presented study results, it can be concluded that the distribution of tree numbers per diameter degrees (diameter structure) in the four measurements of the compartments 51 and 75, did not change. It was also concluded that one functional dependence could be applied for both compartments N=e5,9?e?0,39*d The result of the above is that also in the following measurements, the diameter structure will remain unchanged, in cases of the same or similar selection cuttings both by the scope and by the distribution of felled trees per diameter classes The primary objective of this type of study is to predict, based on a mathematical model of diameter structure development, effect of the scope of selection cuttings and the number of recruitments on the diameter structure, and the simulation of growth, the distribution of trees per diameter classes in the following measurement or measurements, i.e. to foresee the future development of selection stands.

Experimental Study on the Property of Regenerating Concrete in Different Graduation

2012 ◽  
Vol 174-177 ◽  
pp. 921-924
Author(s):  
Xun Zhong Zhang ◽  
Ping Liu ◽  
Bin Jia
Keyword(s):  
Experimental Study ◽  
Moisture Content ◽  
Water Absorption ◽  
Packing Density ◽  
Pressure Loss ◽  
Reference Value ◽  
New Method ◽  
Strength Grade ◽  
Variation Characteristics

Through experiments based on three different graduations of regenerating concrete,the paper analyzes the parameters variation characteristics, such as performance of the density, water absorption, moisture content, packing density and crushed indicators.The research shows that Pressure loss of the quality of the regenerating concrete is proportional with loading force. What’s more, it can also reflect the own strength grade of aggregate in a more direct way and should be a new method to assess aggregate strength. Simultaneously, it gives us a relatively superior graduation and provides reference value for guiding actual project.

scholarly journals Quantum Software EngineeringSupremacy in Intelligent Robotics

2020 ◽  
pp. 135-146
Author(s):  
V. V. Korenkov ◽  
A. G. Reshetnikov ◽  
S.V. Ulyanov
Keyword(s):  
Fuzzy Inference ◽  
Quantum Algorithms ◽  
New Method ◽  
Inference Algorithm ◽  
Robotic Control ◽  
Circuit Implementation ◽  
New Approach ◽  
Support Tool ◽  
Quantum Operators ◽  
Intelligent Robotics

A new approach for implementing quantum massive parallel computations is presented, using methods of circuit implementation of quantum algorithmic gates. Methods for designing fast quantum operators such as superposition, entanglement, andinterference are considered. The presented methodsallow you to reduce the number of actions that must be performed. The implementation is presented as a support tool for SW&HW supercomputer accelerator for modeling quantum algorithms. In particular, a newquantum-genetic and quantum-fuzzy inference algorithm for intelligent robotic control has been implemented. Also, a new method for performing Grover's inference without operations with the productis presented.

scholarly journals Diameter structure of stratum and ecological groups of a Semideciduous Forest area in Dionísio-MG

2012 ◽  
Vol 36 (1) ◽  
pp. 151-160 ◽  
Author(s):  
Priscila Bezerra de Souza ◽  
Agostinho Lopes de Souza ◽  
João Augusto Alves Meira Neto
Keyword(s):  
Diameter Distribution ◽  
Ecological Group ◽  
Ecological Groups ◽  
High Concentration ◽  
Semideciduous Forest ◽  
Homogeneous Groups ◽  
Diameter Structure ◽  
Lower Slope ◽  
Diameter Classes ◽  
Upper Slope

The objective of this study was to obtain homogeneous groups of species and information on their density, dominance and volume, in terms of ecological group and diameter structure of an area of Submontane Semideciduous forest (Mata do Mumbaça) in Dionísio, MG. This work was conducted with data of the diameter distribution per species from floristic and phytosociological (Mata do Mumbaça) survey of 120 plots with 10 x 10 m each one. The 120 plots were contiguous and corresponding to a total sample area of 12,000 m² distributed over the topographic units (Low Ramp, Lower Slope, Upper Slope and Hill Top). The topographic units Low Ramp, Lower Slope and Upper Slope were in the middle stage of succession as they presented incipient stratification into two strata (canopy and understory) i.e. canopy ranging from 5 to 12 m high. However, the stratum Hill Top was classified as intermediate/advanced succession because it had a total height equal to or greater than 12 m. The distribution of individual trees of the four strata on diameter classes showed a typical J-inverted pattern that is, high concentration of individuals in smaller diameter classes and a sharp reduction towards the larger classes. In relation to absolute dominance and total volume of species, the ecological group that stood out in the four strata (Low Ramp, Lower Slope, Upper Slope and Hill Top) was the initial secondary, which were in the intermediate stage of secondary, rapidly developing into the mature phase.

scholarly journals MYI Floes Identification Based on the Texture and Shape Feature from Dual-Polarized Sentinel-1 Imagery

2020 ◽  
Vol 12 (19) ◽  
pp. 3221
Author(s):  
Shiyi Chen ◽  
Mohammed Shokr ◽  
Xinqing Li ◽  
Yufang Ye ◽  
Zhilun Zhang ◽  
...  
Keyword(s):  
Visual Analysis ◽  
Open Water ◽  
New Method ◽  
The Arctic ◽  
First Year ◽  
Ancillary Data ◽  
Sar Images ◽  
Morphological Image Processing ◽  
Automated Algorithms ◽  
Fine Resolution

The Northwest Passage (NWP) in the Arctic is usually covered with hazardous multi-year ice (MYI) and seasonal first-year ice (FYI) in winter, with possible thin ice and open-water areas during transition seasons. Ice classification is important for both marine navigation and climate change studies. Satellite-based Synthetic Aperture Radar (SAR) systems have shown advantages of retrieving this information. Operational ice mapping relies on visual analysis of SAR images along with ancillary data. However, these maps estimate ice types and concentrations within large-size polygons of a few tens or hundreds of kilometers, which are subjectively identified and selected by analysts. This study aims at developing an automated algorithm to identify individual MYI floes from SAR images then classify the rest of the image as FYI and other ice types. The algorithm identifies the MYI floes using extended-maximum operator, morphological image processing, and a few geometrical features. Classifying the rest of the image uses texture and neural network model. The input data is a set of Sentinel-1 A/B Extended Wide (EW) mode images, acquired between September and March 2016–2019. Although the overall accuracy (for all type classification) from the new method scored 93.26%, the accuracy from using the texture classifier only was 75.81%. The kappa coefficient from the former was higher than the latter by 0.25. Compared with the operational ice charts from the Canadian Ice Service, ice type maps from the new method show better distribution of MYI at the fine scale of individual floes. Comparison against MYI concentration from two automated algorithms that use a combination of coarse-resolution passive and active microwave data also confirms the advantage of resolving MYI floes from the fine-resolution SAR.

scholarly journals Wälder ohne Bewirtschaftung: eine Chance für die saproxylische Biodiversität | Forests without harvesting: an opportunity for the saproxylic biodiversity

2009 ◽  
Vol 160 (11) ◽  
pp. 324-333 ◽  
Author(s):  
Rita Bütler ◽  
Thibault Lachat
Keyword(s):  
Forest Biodiversity ◽  
Managed Forests ◽  
Natural Forests ◽  
Old Growth ◽  
Wood Harvesting ◽  
Dead Trees ◽  
Veteran Trees ◽  
Large Trees ◽  
Diameter Classes ◽  
Forest Managers

Veteran trees and deadwood are key elements to maintain forest biodiversity. Setting aside protected forest areas and old-growth patches is a recent concept intended to favor deadwood dependent species. We compared forest areas where no harvesting occurred for at least 30 years with regularly managed forests, in order to assess the efficiency of such conservation measures. We collected data from 24 sites in Switzerland, where we inventoried dead trees and habitat structures such as cavities, cracks, bark pockets, etc. In unmanaged forests we found deadwood amounts of 98–143 m3 and 20 snags > 30 cm DBH per hectare, one and half time more large trees (> 60 cm DBH) und twice as many habitat structures as in managed forests. The latter had in average 15–19 m3 of deadwood and 3 snags > 30 cm DBH per hectare. Deadwood amounts in unmanaged forests were similar to the ones in natural forests of central Europe. However, we found 10–50 times less veteran trees (> 80 cm DBH) than in natural forests (1 vs. 0.2 trees per hectare in unmanaged vs. managed forests). For equal diameter classes, trees had more habitat structures in unmanaged than in managed forests. Forest managers plan to intensify wood harvesting in Swiss forests. Consequently, we recommend to urgently set aside protected forest areas and old-growth patches, to maintain and favor habitat trees in managed forests, and to introduce an efficient sustainable deadwood management in any forest.

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