Search results for "python"
showing 10 items of 160 documents
2014
This paper investigates the finite-time distributedL2–L∞consensus control problem of multiagent systems with parameter uncertainties. The relative states of neighboring agents are used to construct the control law and some agents know their own states. By substituting the control input into multiagent systems, an augmented closed-loop system is obtained. Then, we analyze its finite-time boundedness (FTB) and finite-timeL2–L∞performance. A sufficient condition for the existence of the designed controller is given with the form of linear matrix inequalities (LMIs). Finally, simulation results are described.
Meta-heuristic Algorithms for Nesting Problem of Rectangular Pieces
2017
Abstract Nesting problems consist of placing multiple items onto larger shapes finding a good arrangement. The goal of the nesting process is to minimize the waste of material. It is common to assume, as in the present work, that the stock sheet has fixed width and infinite height, since in the real world a company may have to cut pieces from a roll of material. The complexity of such problems is often faced with a two-stage approach, so-called “hybrid algorithm”, combining a placement routine and a meta-heuristic algorithm. Starting from a given positioning sequence, the placement routine generates a non-overlapping configuration. The encoded solution is manipulated and modified by the met…
Vienotas Latvijas dzīvnieku patversmju datubāzes izveide
2022
Bakalaura darbā “Vienotas Latvijas dzīvnieku patversmju datu bāzes izveide” ir dokumentēti datu struktūru tipi un datu kvalitātes kritēriji, apskatītas dažādas rasmošanas tehnikas un rasmošanas izaicinājumi, veikts pētījums par adopcijai pieejamo dzīvnieku datiem Latvijas dzīvnieku patversmju tīmekļa vietnēs. Daba mērķis ir izveidot vienotu datubāzi ar adopcijai pieejamajiem dzīvniekiem Latvijas dzīvnieku patversmēs. Mērķa realizēšanā izstrādāts rasmotājs ar Python Scrapy satvaru, kas apkopo datus par 11 oficiāli reģistrētajām dzīvnieku patversmēm un izgūtos datus glabā MySQL datu bāzē.
Statistical Explorations and Univariate Timeseries Analysis on COVID-19 Datasets to Understand the Trend of Disease Spreading and Death
2020
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Truncated modules and linear presentations of vector bundles
2018
We give a new method to construct linear spaces of matrices of constant rank, based on truncated graded cohomology modules of certain vector bundles as well as on the existence of graded Artinian modules with pure resolutions. Our method allows one to produce several new examples, and provides an alternative point of view on the existing ones.
Saeimas komisiju sēžu informācijas apkopošanas un apziņošanas sistēma
2022
Šī kvalifikācijas darba mērķis ir izstrādāt sistēmu, kas ļauj cilvēkiem saņemt paziņojumus e-pastā par jaunām un mainītām Saeimas komisiju un apakškomisiju sēdēm. Sistēma paredzēta cilvēkiem, kas dažādu apsvērumu dēļ ir ieinteresēti sekot Saeimas darbam. Izstrādātā programmatūra sastāv no divām daļām. Publiskā tīmekļa lietotne ļauj lietotājiem reģistrēties, izveidot savu e-pasta adrešu sarakstu un pieteikties konkrētu komisiju un apakškomisiju jaunumiem. Tīmekļa nolasītājs regulāri iegūst datus no publiskās Saeimas informācijas sistēmas Titania, saglabā to kopiju datubāzē, konstatē notikušās izmaiņas un nosūta e-pasta vēstules, informējot abonentus par viņus interesējošajiem jaunumiem. Kval…
RTS2: Lessons learned from a widely distributed telescope network
2008
RTS2 (Remote Telescope System 2) is a highly modular open source telescope and observatory management software package. It evolved from RTS, which was developed in Python to control a telescope aimed at observing optical transients of γ ray burts. The development of a network system capable of operating robotic telescopes is both difficult and complicated. Along with continued software development one must be concerned with maintaining operations and obtaining results. This is a review of experiences gained building a network of robotic telescopes. It focuses on describing which issues are important during development of the robotic observatory software and requirements for future developme…
Left-to-right tree pattern matching
1991
We propose a new technique to construct left-to-right matching automata for trees. Our method is based on the novel concept of prefix unifcation which is used to compute a certain closure of the pattern set. From the closure a kind of deterministic matching automaton can be derived immediately. We also point out how to perform the construction incrementally which makes our approach suitable for applications in which pattern sets change dynamically, such as in the Knuth-Bendix completion algorithm.
Clustering-Based Protocol Classification via Dimensionality Reduction
2015
We propose a unique framework that is based upon diffusion processes and other methodologies for finding meaningful geometric descriptions in high-dimensional datasets. We will show that the eigenfunctions of the generated underlying Markov matrices can be used to construct diffusion processes that generate efficient representations of complex geometric structures for high-dimensional data analysis. This is done by non-linear transformations that identify geometric patterns in these huge datasets that find the connections among them while projecting them onto low dimensional spaces. Our methods automatically classify and recognize network protocols. The main core of the proposed methodology…
Matrix Computations for the Dynamics of Fermionic Systems
2013
In a series of recent papers we have shown how the dynamical behavior of certain classical systems can be analyzed using operators evolving according to Heisenberg-like equations of motions. In particular, we have shown that raising and lowering operators play a relevant role in this analysis. The technical problem of our approach stands in the difficulty of solving the equations of motion, which are, first of all, {\em operator-valued} and, secondly, quite often nonlinear. In this paper we construct a general procedure which significantly simplifies the treatment for those systems which can be described in terms of fermionic operators. The proposed procedure allows to get an analytic solut…