|
Analysis, features and applications of available current mode multipliers
Miksl, Jan ; Jeřábek, Jan (referee) ; Šotner, Roman (advisor)
The diploma thesis deals with analysis, validation, measurement of parameters of the commercially available current multiplies (namely the EL2082 and EL4083) and their applications in practice. Control analysis are carried out in OrCAD PSpice program and compared with values from datasheets. Control analysis are focused on AC and DC characteristics of these active blocks. There are discusses the input impedance, the output impedance, the current gain and the possibility of electronic adjusting. The parameters of the elements were verified by measurements. Proposals for circuit applications (selective circuit, oscillator, frequency filter) with EL2082 and EL4083 are presented and analyzed in the program OrCAD. Three oscillator circuit designs are experimentally tested and the results are compared with the theoretical expectations and simulations in OrCAD. The possibility of electronic control for oscillators is examined. Also the sensitivity and the tolerance analysis are carried out. The constructional details of oscillators are presented at the end of this work.
|
|
Selected data mining methods and their applicability to the television audience monitoring data in the Czech Republic
Walter, Jan ; Jirků, Petr (referee) ; Hájek, Petr (advisor)
Data mining is nowadays a fast-growing field, which incorporates machine learning, statistics, and logic within computer science. It has the potential to bring new insights into almost all branches of human activity, because the data are stored almost everywhere. This thesis tries to show the main aspects of the original Czech method Guha, to demonstrate its strength via its application to television audience data, and finally to compare it with the association rules method, which is similar to it. The ambition of this text is to interconnect the world of praxis with the theoretical field, where methods are invented. It also serves as an introduction to data mining itself. The results show that Guha is a full-value method with several interesting features and might be a good tool for extracting knowledge from analyzed data.
|
|
Needs of patients in the internal and surgical ambulance
VŠETULOVÁ, Anna
This bachelor thesis is titled ``The Needs of Patients in Internal and Surgical Outpatient Wards{\crq}q. The issue of patients{\crq} needs is in the limelight of nursing and its main characteristic feature is planned satisfaction of needs of healthy and ill individuals. The main objective of the thesis was to ascertain what needs are felt by the patients in the internal and the surgical outpatient wards and what patients{\crq} needs are identified by the nurses working in the concerned outpatient wards. The research was conducted using a quantitative and a qualitative research method. The quantitative method involved a questionnaire for the patients, designed on the basis of the Maslow{\crq}s pyramid of needs. While using this method, three hypotheses were raised and the obtained results confirmed them. The results of the quantitative research were assessed by means of charts and tables. The data for the qualitative research method were collected by means of interviews with nurses. The questions asked in the interviews and in the questionnaire were based on the Maslow{\crq}s pyramid of needs. One research question assisted us to attain the objective. The method of data categorization in tables and charts was selected for processing the research results. The research set consisted of patients and nurses in the hospital of České Budějovice. By means of the research we have ascertained that the patients{\crq} needs differ in dependence on the age and the gender. The most commonly unsatisfied needs include cognitive needs, in particular the need to know. The unsatisfied needs of the patients are individual and, at average, cover the lower and the higher needs of the Maslow{\crq}s pyramid. The nurses in outpatient wards identify mostly lower needs in the patients. Most nurses do not see higher needs of the patients unsatisfied. The conclusion of the thesis is the idea that the identification of the patients{\crq} needs by the patients themselves differs from the identification of patients{\crq} needs by the nurses. The findings obtained in the research could be used for publication in technical literature. We have also created an educational material for nurses working in outpatient wards since it is important to learn more about the patients{\crq} needs in order to facilitate better satisfaction of the patients{\crq} needs in outpatient wards.
|
|
Differences in design of Urban's Test for Creative Thinking-Drawing Production of children with specific learning disability
LAVÍROVÁ, Lucie
The main goal of this bachelor?s dissertation is to describe the figural creativity in a group of children with a specific learning disorders using Urban?s Test for Creative Thinking-Drawing Production (TCT-DP). In the theoretical section, the author will characterise the phenomenon of creativity, the area of specific learning disabilities, the respondents? developmental period and the theoretical starting points for the research method. In the practical section, the author will set out the divergences which can be seen in drawings of children with specific learning disabilities and children without any such diagnosis on the basis of a quantitative analysis of drawings by children in the 3rd and 4th class at primary school. The author will define any similar features which may have been discovered in the respondents? drawings upon the basis of the quantitative analysis.
|
|
On-line learning in real-time environments
Pacovský, Ondřej ; Spier, Emmet (advisor) ; Mrázová, Iveta (referee)
In this work, a novel reinforcement learning algorithm, Stimulus Action Reward Network (SARN), is developed. It is targeted for application in real-time domainswhere the inputs are usually continuous and adaptation must proceed on-line, without separate training periods. Another objective is to minimise the amount of problem-specific teacher(human) input needed for successful application of the algorithm. The SARN architecture combines a connectionist network and scalar reinforcement feedback by employing Hebbian principles. By adapting the network weights, connections are established between stimuli and actions that lead to positive feedback. Since the links between the input stimuli and the actions are formed quite rapidly, it is possible to use a large number of stimuli. This leads to the idea of using recurrent random network (Echo State Network) as a pre-processing layer. Prototype implementation is tested in Unreal 2004 game environment. The comparison with Q-learning shows that on the time scale of tens of seconds to minutes, SARN typically achieves better performance. When coupled with an Echo State Network, SARN requires a uniquely low amount of problem-specific information supplied by the teacher. These features make SARN useful for domains such as autonomous robot control and game AI.
|
|
Machine learning-based identification of separating features in molecular fragments
Ravi, Aakash ; Hoksza, David (advisor) ; Škoda, Petr (referee)
Chosen molecular representation is one of the key parameters of virtual screening campaigns where one is searching in-silico for active molecules with respect to given macromolecular target. Most campaigns employ a molecular representation in which a molecule is represented by the presence or absence of a predefined set of topological fragments. Often, this information is enriched by physiochemical features of these fragments: i.e. the representation distinguishes fragments with identical topology, but different features. Given molecular representation, however, most approaches always use the same static set of features irrespective of the specific target. The goal of this thesis is, given a set of known active and inactive molecules with respect to a target, to study the possibilities of parameterization of a fragment-based molecular representation with feature weights dependent on the given target. In this setting, we are given a very general molecular representation, with targets represented by sets of known active and inactive molecules. We subsequently propose a machine-learning approach that would identify which of the features are relevant for the given target. This will be done using a multi-stage pipeline that includes data preprocessing using statistical imputation and dimensionality...
|
|
Dopravní napojení venkovských obcí Jihomoravského kraje
Kukleta, Tomáš
The theme of this thesis is the analysis of transport connection of rural municipalities (villages) in South Moravian Region. In the theoretical part by means of literature search terms regarding transport and transport services are defined. Then the description of transport types according to the covered territory and characteristics of the Integrated Transport System of South Moravian Region (IDS JMK) follow. After that the transport and socio-economic characteristics of South Moravian Region are also described. In the practical part the situational analysis of the transport connection of municipalities in South Moravian Region on weekdays and at weekends is carried on. It is evaluated on the basis of three parameters: frequency, time and price. The transport service was learned in the groups of municipalities according to the population in the direction to the catchment area centre of individual districts and to the capital of South Moravian Region - Brno. The practical part is closed with the analysis of alternative personal transport (time and price of travel) with different number of passengers and the possibility of cycling for three selected micro-regions.
|
|
Systems of protection and remote control of medium voltage substation with using protection with communication Profibus and IEC61850
Tesařík, Jan ; Fazekaš, Tibor (referee) ; Huzlík, Rostislav (advisor)
This Diploma thesis deals with the system for protection and remote control for MV switchgear by using protection relays with communication protocols PROFIBUS and IEC61850. The first part represents a theoretical introduction to points at issue. In the first part, the reader will get conceived with the communication standard IEC61850 and its typical architecture for MV switchgear, and also with data model based on this standard. Second part discusses the PROFIBUS communication protocol. In this part, the reader can acquire information about transmit technology and communication protocol for PROFIBUS. Last part of this theoretical chapter contains an overview on the MODBUS communication. The second part deals with the description of protection relays, which were used for the purposes of this thesis. In the first subchapter, the reader can learn about the REM620 from ABB Company, its configuration and cooperation with IEC61850 standard. Second subchapter describes the HMS Anybus communication converter. The reader will get further knowledge about description of this device and how to configure the communication protocols. In last subchapter, a description of protection relay SIPROTEC 7SJ64 produced by Siemens company is explained. With the third part starts the practical work within this thesis with protection relays. This chapter is divided into two parts; each describes different system with using the protection relays. First system contains ABB REM620 relay and HMS Anybus converter. By converting MODBUS protocol with the Anybus converter, the REM620 can be connected to PROFIBUS network. This part includes the configuration of REM620 and Anybus converter, the engineering of MODBUS and PROFIBUS protocols and testing various signals in those networks. The second system contains Siemens SIPROTEC 7SJ64 and ethernet switch. This subchapter deals with the preparation of configuration for SIPROTEC 7SJ64 and the engineering for IEC61850 communication. This part finishes with the comparing of both systems on the engineering bases. The last part of this thesis is about working with the LabVIEW instrument. Within this part, the software emulation of protection relay was made. The program offers to the user the possibility of setting input parameters as the effective values of current and voltage, the frequency and the current phase shift. Also the user can set the thresholds for protection functions, such as the Overcurrent, the Voltage and the Frequency protection. As last one, the Phase unbalance protection for the current phases is present.
|
|
Discipline in the primary school
Sehnalová, Jana ; Hejlová, Helena (advisor) ; Stará, Jana (referee)
The thesis has both, theoretical and research character. It is focused on the problems connected with discipline in the primary school. The theoretical part describes causes and forms of indiscipline. There are presented the effective ways of prevention and managing of indiscipline. The empirical part describes a research that was aimed to learn and to compare teachers' and pupils' (in year four and five) attitude to indiscipline. Further, it was intended to find out frequency of indiscipline, its teachers' and pupils' perception and its disciplinary measures at two selected research primary school
|
|
Comparison of Czech and English Speaker's Use of English Intersentential Connectives in Geographic Articles
Jirsová, Miroslava ; Pípalová, Renata (advisor) ; Matuchová, Klára (referee)
The present thesis is a corpus study comparing English and Czech (non-native) speakers' use of intersentential connectives in English geographic articles. The corpus contains English articles written by British English and Czech speakers, and translations from Czech into English. The thesis examines the frequency, formal diversity, semantic categories, position, punctuation, syntactic functions and formality of the connectives in the corpus. The results confirm the original hypothesis that texts written by Czech speakers are less rich in intersentential connectives, which applies both to their frequency and formal diversity. In the other categories, no significant differences were found. The interpretation of the differences is based on negative transfer, later stage in the order of acquiring language components within second language learning and acquisition, and the specificity of Czech scientific writing.
|
guest ::
