Optimization Algorithm with Probability Direction Vector

Disertační práce prezentuje navržený algoritmus s pravděpodobnostním směrovým vektorem. Tento algoritmus ve své základní formě spadá do kategorie algoritmů stochastických. Pro svoji práci využívá statisticky ovlivněné perturbace jedince stavovým prostorem. Dále práce pojednává o rozšíření základní myšlenky do podoby rojové formy algoritmu. Přínosem této modifikace je zavedení stochastické kooperace. Jedinci kooperují s nejlepším jedincem pouze na úrovni pravděpodobnosti a nejsou jí řízeni přímo. V práci jsou dále použity statistické testy pro srovnání výsledků navrženého algoritmu s podobně pracujícími algoritmy Simulované žíhání a SOMA. Kromě vybraných testovacích funkcí jsou zde uvedeny další experimentální použití navržených algoritmů. Práce je uzavřena kapitolou, která hledá obecně použitelné nastavení řídicích parametrů jednotlivých algoritmů.This disertation presents optimization algorithm with probability direction vector. This algorithm, in its basic form, belongs to category of stochastic optimization algorithms. It uses statistically effected perturbation of individual through state space. This work also represents modification of basic idea to the form of swarm optimization algoritm. This approach contains form of stochastic cooperation. This is one of the new ideas of this algorithm. Population of individuals cooperates only through modification of probability direction vector and not directly. Statistical tests are used to compare resultes of designed algorithms with commonly used algorithms Simulated Annealing and SOMA. This part of disertation also presents experimental data from other optimization problems. Disertation ends with chapter which seeks optimal set of control variables for each designed algorithm.

Antiblockade in Rydberg excitation of an ultracold lattice gas

It is shown that the two-step excitation scheme typically used to create an ultracold Rydberg gas can be described with an effective two-level rate equation, greatly reducing the complexity of the optical Bloch equations. This allows us to solve the many-body problem of interacting cold atoms with a Monte Carlo technique. Our results reproduce the Rydberg blockade effect. However, we demonstrate that an Autler-Townes double peak structure in the two-step excitation scheme, which occurs for moderate pulse lengths as used in the experiment, can give rise to an antiblockade effect. It is observable in a lattice gas with regularly spaced atoms. Since the antiblockade effect is robust against a large number of lattice defects it should be experimentally realizable with an optical lattice created by CO$_{2}$ lasers.Comment: 4 pages, 6 figure

Reinforcement of Company's Competitiveness by Information System Improvement

Diplomová práce pojednává o návrzích na posílení konkurenceschopnosti firmy zlepšením webové prezentace. V první části práce jsou teoreticky popsány hlavní pojmy problematiky, poslední trendy internetových aplikací a dalších nástrojů, které jsou následně využity v analytické i návrhové části práce. Druhou část práce tvoří představení společnosti spolu s analýzou jejích webových aplikací. Po důkladné analýze jsou v následující kapitole navrhována taková opatření, která by měla zlepšit úroveň těchto webů na internetu a v konečném důsledku posílit pozici společnosti na trhu. V závěrečné části je shrnut přínos navrhovaného řešení a ekonomické zhodnocení tohoto návrhu.This thesis is about boosting the company’s competitiveness by improvement of its web pages. The first part theoretically describes all main terms and ideas about internet and web applications which are used in the next chapter. Second part is about introduction of the company and its analysis. After detailed analysis providing results for proposals is the main chapter focused on suggestion of new measures and steps how to improve the company’s position on the market. These main steps and whole benefits are summarized in the last part of this thesis.

Proposal of Information System for the Business Company

Bakalářská práce pojednává o implementaci informačního systému do obchodní společnosti. V první části práce jsou přiblíženy základní údaje společnosti a její historie. Následuje mapa procesů s detailním popisem všech hlavních a podpůrných procesů. V další části práce jsou vypracovány hlavní ekonomické analýzy společnosti a zhodnocen stávající software. Navazuje teoretická část práce, která seznamuje se současnými trendy podnikových informačních systémů a objasňuje hlavní pojmy problematiky. V předposlední části práce, návrhové části, jsou definovány strategické cíle společnosti a navrhnuty nové mapy procesů optimalizované pro navrhovaný IS (informační systém). V závěrečné části práce je pomocí stanovených kritérií vybírán co nejvhodnější komerční IS a zmíněn přínos implementace spolu s ekonomickým zhodnocením implementace.The bachelor´s thesis deals with implementation of information system in business organization. Its first part is dedicated firstly to description of chosen company with its basic data and history and secondly to presenting the company’s process map while illustrating all of the main and supporting processes’ details. Next two chapters are engaged in analysing the economic situation of the company and its software availability. Following chapter presents the theory of information systems with its current trends and explains the very important terms in the field. After defining the strategic goals of the company, there are new process maps designed as optimal for the company and for the proposed information system. A suitable commercial information system is being searched and chosen according to the set criteria in the last chapter. Lastly the benefits of executed implementation are analysed and growth of effectiveness is measured.

A User Study on Explainable Online Reinforcement Learning for Adaptive Systems

Online reinforcement learning (RL) is increasingly used for realizing adaptive systems in the presence of design time uncertainty. Online RL facilitates learning from actual operational data and thereby leverages feedback only available at runtime. However, Online RL requires the definition of an effective and correct reward function, which quantifies the feedback to the RL algorithm and thereby guides learning. With Deep RL gaining interest, the learned knowledge is no longer explicitly represented, but is represented as a neural network. For a human, it becomes practically impossible to relate the parametrization of the neural network to concrete RL decisions. Deep RL thus essentially appears as a black box, which severely limits the debugging of adaptive systems. We previously introduced the explainable RL technique XRL-DINE, which provides visual insights into why certain decisions were made at important time points. Here, we introduce an empirical user study involving 54 software engineers from academia and industry to assess (1) the performance of software engineers when performing different tasks using XRL-DINE and (2) the perceived usefulness and ease of use of XRL-DINE.Comment: arXiv admin note: substantial text overlap with arXiv:2210.0593

A test method to assess operator safety using Closed Transfer Systems

Closed transfer systems (CTS) are devices for the contactless transfer of plant protection products (PPP) into pesticide application equipment (PAE). They are intended to protect the operator against contamination with undiluted PPP during filling of the sprayer. CTS are universal and can be mounted on a wide range of different types and sizes of PAE. They are able to transfer the PPP from container of diverse sizes, enable also partial draining and containers can be easily rinsed after complete emptying. At the moment there is no reliable information about the contribution of CTS to operator safety. For this reason a test method was established in order to compare the operator´s contamination after the dosing process using CTS and conventional filling into the PAE. Aim of the project was to quantify the dermal exposure at different parts of the operator´s body. Instead of PPP a mixture of water and a fluorescent tracer (Pyranin) was used. It was filled into 10-Litercontainers and sealed. The operator was equipped with Personal Protective Clothing which was washed after the filling process in order to determine the amount of contamination on different parts of the body by using fluorometry. The different filling processes were performed by 3 different persons with 5 repetitions per setting using an attached field crop sprayer (RAU D2) with a CTS mounted on the induction hopper and also on the dome shaft. The results show that CTS can significantly help to minimize operator exposure in comparison to conventional filling and that the test procedure established is able to fulfil the defined aims of testing CTS.Closed transfer systems (CTS) are devices for the contactless transfer of plant protection products (PPP) into pesticide application equipment (PAE). They are intended to protect the operator against contamination with undiluted PPP during filling of the sprayer. CTS are universal and can be mounted on a wide range of different types and sizes of PAE. They are able to transfer the PPP from container of diverse sizes, enable also partial draining and containers can be easily rinsed after complete emptying. At the moment there is no reliable information about the contribution of CTS to operator safety. For this reason a test method was established in order to compare the operator´s contamination after the dosing process using CTS and conventional filling into the PAE. Aim of the project was to quantify the dermal exposure at different parts of the operator´s body. Instead of PPP a mixture of water and a fluorescent tracer (Pyranin) was used. It was filled into 10-Litercontainers and sealed. The operator was equipped with Personal Protective Clothing which was washed after the filling process in order to determine the amount of contamination on different parts of the body by using fluorometry. The different filling processes were performed by 3 different persons with 5 repetitions per setting using an attached field crop sprayer (RAU D2) with a CTS mounted on the induction hopper and also on the dome shaft. The results show that CTS can significantly help to minimize operator exposure in comparison to conventional filling and that the test procedure established is able to fulfil the defined aims of testing CTS