Search results for "bootstrap"
showing 10 items of 67 documents
Bibliotēkas pārvaldes sistēma
2021
Kvalifikācijas darba “Bibliotēkas pārvaldes sistēma” galvenais mērķis ir aprakstīt un izstrādāt sistēmu, kas palīdzētu daļēji digitalizēt bibliotēkas pārvaldes funkcionalitāti un nodrošinātu iespēju attālināti pārskatīt bibliotēkā pieejamos resursus. “Bibliotēkas pārvaldes sistēma” ir tiešsaistē pieejama sistēma, kas ļauj bibliotekāriem pārvaldīt grāmatu klāstu bibliotēkā un novērot veiktās rezervācijas. Ikdienas lietotāji var pārskatīt bibliotēkā pieejamās grāmatas un veikt šo grāmatu rezervāciju, kas nodrošina resursa pieejamību konkrētam lietotājam, ja uzreiz fiziski paņemt to nav iespējams. Lietotājs var brīvi uzzināt informāciju par grāmatu žanriem un autoriem, kā arī pārskatīt iepriek…
"Bankett"-banketu zāļu un svētku pakalpojumu katalogs, galvenais palīgs pasākumu organizēšanā Rīgā
2018
Kvalifikācijas darba mērķis ir izstrādāt sistēmu priekš pasākumu organizēšanas. Sistēma ļauj organizēt banketus Rīgā ātri un kvalitatīvi, tāpēc ka sistēmā atrodas visu izlaides sfēru pārstāvji. Pateicoties ērtai saskarnei ir ērti atrast nepieciešamo pakalpojumu. Lietotāji var iepazīties ar interesantām ziņām, kas satur padomus priekš labu pasākumu organizēšanas. Sistēma domāta gan lietotājiem, kuri grib atrast pakalpojumu savam pasākumam, gan lietotājiem, kas grib piedāvāt citiem savus pakalpojumus, kā arī administratoriem, kuri pārvalda sistēmu.
Transportlīdzekļu nomas un pārvaldes sistēma
2019
Informācijas sistēma “Transportlīdzekļu nomas un pārvaldes sistēma” ir publiska tiešsaistes sistēma, kas sniedz iespēju digitalizēt transportlīdzekļu pārvaldi, kā arī ieviest transportlīdzekļu nomas iespējas attālināti. Sistēma ļauj elektroniski iesniegt transportlīdzekļu nomas pieteikumus lietotājiem un pārvaldīt transportlīdzekļu nomas un pieteikumus atbildīgajām personām. Sistēmas lietotāji transportlīdzekļu nomas pieteikuma iesniegšanas brīdī veic apmaksu, kas padara nomas procesu daudz pārskatāmāku un drošāku pakalpojuma sniedzējiem. Sistēmā ietvertā transportlīdzekļu meklēšanas funkcija ļauj lietotājiem ērtāk un pārskatāmāk atrast sev vēlamo vai konkrētajā laikā pieejamo transportlīdz…
Model Transformation Languages and Their Implementation by Bootstrapping Method
2008
In this paper a sequence of model transformation languages L0, L1, L2 is defined. The first language L0 is very simple, and for this language it is easy to build an efficient compiler to C++. The next language L1 is an extension of L0, and it contains powerful pattern definition facilities. The last language L2 is of sufficiently high level and can be used for implementation of traditional pattern-based high level model transformation languages, as well as for the development of model transformations directly. For languages L1 and L2 efficient compilers have been built using the bootstrapping method: L1 to L0 in L0, and L2 to L1 in L1. The results confirm the efficiency of model transformat…
CONSTRUCTING, BOOTSTRAPPING, AND COMPARING MORPHOMETRIC AND PHYLOGENETIC TREES: A CASE STUDY OF NEW WORLD MONKEYS (PLATYRRHINI, PRIMATES)
2005
Morphometric data sets are often phenetically analyzed by using various kinds of spatial, metric, or nonmetric multivariate analyses. Such methods produce results that are difficult to compare directly with molecular or morphological phylogenetic hypotheses, which are usually expressed by using nonspatial tree representations. Therefore, it is useful in a comparative approach to analyze, and above all to visualize, morphometric pairwise relationships as tree structures. For this purpose, several additive or ultrametric methods exist, which often return different topologies for the same data set. Objective criteria are thus needed to identify the tree-building algorithm (or algorithm family)…
Entrepreneurial innovativeness and growth ambitions in thick vs. thin regional innovation systems
2018
Research in economic geography has paid increasing attention to regional innovation systems (RISs) as a potential vehicle for growth and development. Yet despite an increasing amount of research st...
Productivity of wastewater treatment plants in the Valencia Region of Spain
2017
Abstract This study analyses the evolution of productivity over the 2008–2012 period for a homogenous set of 199 wastewater treatment plants that are located in the Valencia Region of Spain and utilize the same treatment technology, using the smoothed bootstrap Malmquist productivity index based on Data Envelopment Analysis (DEA). The results reveal a negative trend in productivity that is mainly the result of resource management rather than an inappropriate level of innovation or use of new technologies. In addition, the effect of exogenous factors on productivity is analysed using the Kruskal-Wallis (KW) test, finding that productivity levels were affected by the quality of the influent w…
Assessing the efficiency of wastewater treatment plants: A double-bootstrap approach
2017
Abstract Benchmarking the performance of wastewater treatment plants (WWTPs) is essential for promoting their long-term sustainability. Recent research has applied data envelopment analysis (DEA) models to evaluate the efficiency of WWTPs providing a synthetic index of their performance. However, the traditional DEA is a deterministic method; therefore, regression analysis cannot be used to explore the external factors influencing efficiency scores. To overcome this limitation, in this study, a double bootstrap DEA model was used for the first time to compute the efficiency scores for a sample of WWTPs. The confidence intervals for efficiency scores were estimated for each facility. Results…
Non-parametric probabilistic forecasting of academic performance in Spanish high school using an epidemiological modelling approach
2013
Academic underachievement is a concern of paramount importance in Europe, and particularly in Spain, where around of 30% of the students in the last two courses in high school do not achieve the minimum knowledge academic requirement. In order to analyse this problem, we propose a mathematical model via a system of ordinary differential equations to study the dynamics of the academic performance in Spain. Our approach is based on the idea that both, good and bad study habits, are a mixture of personal decisions and influence of classmates. Moreover, in order to consider the uncertainty in the estimation of model parameters, a bootstrapping approach is employed. This technique permits to for…
Isotonic regression for metallic microstructure data: estimation and testing under order restrictions
2021
Investigating the main determinants of the mechanical performance of metals is not a simple task. Already known physical inspired qualitative relations between 2D microstructure characteristics and 3D mechanical properties can act as the starting point of the investigation. Isotonic regression allows to take into account ordering relations and leads to more efficient and accurate results when the underlying assumptions actually hold. The main goal in this paper is to test order relations in a model inspired by a materials science application. The statistical estimation procedure is described considering three different scenarios according to the knowledge of the variances: known variance ra…