نتایج جستجو برای: classification tree

تعداد نتایج: 645247  

Journal: :caspian journal of environmental sciences 2010
r. zarkami

classification trees (j48) were induced to predict the habitat requirements of tench (tinca tinca). 306 datasets were used for the given fish during 8 years in the river basins in flanders (belgium). the input variables consisted of the structural-habitat (width, depth, gradient slope and distance from the source) and physic chemical (ph, dissolved oxygen, water temperature and electric conduct...

Journal: :caspian journal of environmental sciences 2011
o. rafieyan al. et

this study is a contribution to assess the high resolution digital aerial imagery for semi-automatic analysis of tree species identification. to maximize the benefit of such data, the object-based classification was conducted in a mixed forest plantation. two subsets of an ultracam d image were geometrically corrected using aero-triangulation method. some appropriate transformations were perfor...

Journal: :international journal of smart electrical engineering 2012
s.mehdi hashemi mehrdad almasi roozbeh ebrazi mohsen jahanshahi

traffic prediction systems can play an essential role in intelligent transportation systems (its). prediction and patterns comprehensibility of traffic characteristic parameters such as average speed, flow, and travel time could be beneficiary both in advanced traveler information systems (atis) and in its traffic control systems. however, due to their complex nonlinear patterns, these systems ...

Results of damage prediction in buildings can be used as a useful tool for managing and decreasing seismic risk of earthquakes. In this study, damage spectrum and C4.5 decision tree algorithm were utilized for damage prediction in steel buildings during earthquakes. In order to prepare the damage spectrum, steel buildings were modeled as a single-degree-of-freedom (SDOF) system and time-history...

Journal: :journal of biostatistics and epidemiology 0
morteza rostami department of biostatistics and epidemiology, school of public health, kerman university of medical sciences, kerman, iran behshid garrusi department of community medicine, neuroscience research center, afzallipour medical school, kerman university of medical sciences, kerman, iran mohamad reza baneshi modeling in health research center, institute for futures studies in health, kerman university of medical sciences, kerman, iran

background & aim: in many medical studies, one data set is used to construct the model, and to test its performance. this approach is prone to over optimization, and leads to statistics with low chance of external validity. data splitting can be used to create training and test sets but the cost is reduction in power. the aim of this study was to demonstrate the ability of bootstrap aggregating...

Journal: Desert 2012
F. Mellati H. Arzani H. Azarnivand H.R. Keshtkar S.K. Alavipanah

Land cover is one of basic data layers in geographic information system for physical planning and environmentalmonitoring. Digital image classification is generally performed to produce land cover maps from remote sensing data,particularly for large areas. In the present study the multispectral image from IRS LISS-III image along with ancillary datasuch as vegetation indices, principal componen...

Journal: :journal of research in health sciences 0
hamid reza khalkhali hadi lotfnezhad afshar omid esnaashari nasrollah jabbari

background : breast cancer survival has been analyzed by many standard data mining algorithms. a group of these algorithms belonged to the decision tree category. ability of the decision tree algorithms in terms of visualizing and formulating of hidden patterns among study variables were main reasons to apply an algorithm from the decision tree category in the current study that has not studied...

Journal: :International Journal of Peer to Peer Networks 2011

Journal: :پژوهش های جغرافیای طبیعی 0
پری گلشنی دانشجوی کارشناسی ارشد، گروه جنگلداری، دانشگاه علوم کشاورزی و منابع طبیعی ساری اصغر فلاح دانشیار گروه جنگلداری، دانشگاه علوم کشاورزی و منابع طبیعی ساری جعفر اولادی قادیکلایی استادیار گروه جنگلداری، دانشگاه علوم کشاورزی و منابع طبیعی ساری سیاوش کلبی دانشجوی دکتری، گروه جنگلداری، دانشگاه علوم کشاورزی و منابع طبیعی ساری

introduction the increasing use of satellite remote sensing data for civilian use has proved to be the most cost-effective means of mapping and monitoring for environmental changes. satellite remote sensing has played a pivotal role in finding forest cover, vegetation type and land use changes in urban areas. one of the most complete of these methods is classification. the conventional per-pixe...

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