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STATISTICAL LANGUAGE MODELS BASED ON NEURAL NETWORKS
Mikolov, Tomáš ; Zweig, Geoffrey (referee) ; Hajič,, Jan (referee) ; Černocký, Jan (advisor)
Statistické jazykové modely jsou důležitou součástí mnoha úspěšných aplikací, mezi něž patří například automatické rozpoznávání řeči a strojový překlad (příkladem je známá aplikace Google Translate). Tradiční techniky pro odhad těchto modelů jsou založeny na tzv. N-gramech. Navzdory známým nedostatkům těchto technik a obrovskému úsilí výzkumných skupin napříč mnoha oblastmi (rozpoznávání řeči, automatický překlad, neuroscience, umělá inteligence, zpracování přirozeného jazyka, komprese dat, psychologie atd.), N-gramy v podstatě zůstaly nejúspěšnější technikou. Cílem této práce je prezentace několika architektur jazykových modelůzaložených na neuronových sítích. Ačkoliv jsou tyto modely výpočetně náročnější než N-gramové modely, s technikami vyvinutými v této práci je možné jejich efektivní použití v reálných aplikacích. Dosažené snížení počtu chyb při rozpoznávání řeči oproti nejlepším N-gramovým modelům dosahuje 20%. Model založený na rekurentní neurovové síti dosahuje nejlepších publikovaných výsledků na velmi známé datové sadě (Penn Treebank).
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Physically-based Modeling and Simulation
Dvořák, Radim ; Racek, Stanislav (referee) ; Šujanský,, Milan (referee) ; Zbořil, František (advisor)
Disertační práce se zabývá modelováním znečištění ovzduší, jeho transportních a disperzních procesů ve spodní části atmosféry a zejména numerickými metodami, které slouží k řešení těchto modelů. Modelování znečištění ovzduší je velmi důležité pro předpověď kontaminace a pomáhá porozumět samotnému procesu a eliminaci následků. Hlavním tématem práce jsou metody pro řešení modelů popsaných parciálními diferenciálními rovnicemi, přesněji advekčně-difúzní rovnicí. Polovina práce je zaměřena na známou metodu přímek a je zde ukázáno, že tato metoda je vhodná k řešení určitých konkrétních problémů. Dále bylo navrženo a otestováno řešení paralelizace metody přímek, jež ukazuje, že metoda má velký potenciál pro akceleraci na současných grafických kartách a tím pádem i zvětšení přesnosti výpočtu. Druhá polovina práce se zabývá poměrně mladou metodou ELLAM a její aplikací pro řešení atmosférických advekčně-difúzních rovnic. Byla otestována konkrétní forma metody ELLAM společně s navrženými adaptacemi. Z výsledků je zřejmé, že v mnoha případech ELLAM překonává současné používané metody.
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Point and Line Parameterizations Using Parallel Coordinates for Hough Transform
Juránková, Markéta ; Kälviäinen, Heikki (referee) ; Kittler, Josef (referee) ; Herout, Adam (advisor)
Tato dizertační práce se zaměřuje na použití paralelních souřadnic pro parametrizaci čar a bodů. Paralelní souřadný systém má souřadnicové osy vzájemně rovnoběžné. Bod ve dvourozměrném prostoru je v paralelních souřadnicích zobrazen jako přímka a přímka jako bod. Toho je možné využít pro Houghovu transformaci - metodu, při které body zájmu hlasují v prostoru parametrů pro danou hypotézu. Parametrizace pomocí paralelních souřadnic vyžaduje pouze rasterizaci úseček, a proto je velmi rychlá a přesná. V práci je tato parameterizace demonstrována na detekci maticových kódů a úběžníků.
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Network Architecture and Interconnection of Embedded Systems
Trchalík, Roman ; Drábek, Vladimír (referee) ; Srovnal, Vilém (referee) ; Švéda, Miroslav (advisor)
The thesis focuses on the architecture of embedded systems. It summarizes the current state of accepted standards from IEEE 1451 family, which deals with creating an environment for the sensors and their involvement in various networks. These standards describe the open, network-independent communication architecture for a sensor-based system. One of the main outcomes of this work is the architectures presented as case studies, which can be used as design patters for embedded applications. They are demonstrated on ZigBee technology suitable mainly for small devices with very low power consumption. Based on these studies the new design of universal gateway was proposed. Its major advantage is that it allows interconnection of the endpoints based on different sensor network technologies. Additionally, the thesis deals with modifying the routing protocol of ZigBee network in order to reduce power consumption required to transmit one data packet.
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Optimization of network flow monitoring
Žádník, Martin ; Lhotka,, Ladislav (referee) ; Matoušek, Radomil (referee) ; Sekanina, Lukáš (advisor)
The thesis deals with optimization of network flow monitoring. Flow-based network traffic processing, that is, processing packets based on some state information associated to the flows which the packets belong to, is a key enabler for a variety of network services and applications. The number of simultaneous flows increases with the growing number of new services and applications. It has become a challenge to keep a state per each flow in a network device processing high speed traffic. A flow table, a structure with flow states, must be stored in a memory hierarchy. The memory closest to the processing is known as a flow cache. Flow cache management plays an important role in terms of its effective utilization, which affects the performance of the whole system. This thesis focuses on an automated design of cache replacement policy optimized to a deployment on particular networks. A genetic algorithm is proposed to automate this process. The genetic algorithm generates and evaluates evolved replacement policies by a simulation on obtained traffic traces. The proposed algorithm is evaluated by designing replacement policies for two variations of the cache management problem. The first variation is an evolution of the replacement policy with an overall low number of state evictions from the flow cache. The second variation represents an evolution of the replacement policy with a low number of evictions belonging to large flows only. Optimized replacement policies for both variations are found while experimenting with various encoding of the replacement policy and genetic operators. The newly evolved replacement policies achieve better results than other tested policies. The evolved replacement policy lowers the overall amount of evictions by ten percent in comparison with the best compared policy. The evolved replacement policy focusing on large flows lowers the amount of their evictions two times. Moreover, no eviction occurs for most of the large flows (over 90%). The evolved replacement policy offers better resilience against flooding the flow cache with large amount of short flows which are typical side effects of scanning or distributed denial of service activities. An extension of the replacement policy is also proposed. The extension complements the replacement policy with an additional information extracted from packet headers. The results show further decrease in the number of evictions when the extension is used.
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The mentor position within in the nursing team, and her the cooperation with the shift nurses.
MAŘÍKOVÁ, Václava
Abstract This diploma thesis deals with the position of nursing mentor and her cooperation with shift nurses. The theoretical part of the thesis is divided into seven chapters, and focuses on the current nursing profession that is also interconnected with education and legislature. The work is further dealing with the role of the nursing mentor and her cooperation with the nursing team. Last but not least, the theoretical part is devoted to the important role of ethics and morality in the nursing profession that is undoubtedly of central importance. We are also addressing the Certified Course for Mentors that we regard as rather positive as one of the forms of lifelong education. The nurses completing the course will acquire new skills and knowledge, but also knowledge in the field of psychology, law, didactics and other fields. The role of a nurse-mentor is rather important as she can pass the acquired knowledge further and positively influence the students in this way over the course of professional training facilitating their adaptation when they start their professional career. It was the main objective of this work to map the current position of a nurse? mentor, what her experience is with cooperation with other shift nurses as part of practical education in the workplace, and whether the nurses direct and sufficiently motivate the students to become interested in the profession of general nurses or midwifes. The section on research employed two methods. The first method consisted in quantitative research in the form of questionnaires. We employed two questionnaires, one targeted the nurses-non-mentors, while the second was intended for nurses-mentors. As a second method, qualitative research was carried out using semi-structured interview conducted with selected head and ward (charge) nurses. Using the qualitative survey approach, we tested the following working hypotheses. H1: the general nurses know what the role of a nurse-mentor is in the health-care team, H2: the nurses-mentors motivate their students to raise their interest in the profession of general nurse, H3: the nurses-mentors are not always occupying leading positions, H4: the nurses-mentors are perceived positively by the shift nurses,
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The prevention of pathological occurence of burnout syndrome (an example of employer)
BLAHOVÁ, Nela
This bachelor thesis deals with the issue of burnout syndrome which is currently a very discuss frequent problem. The rate of working stress will be investigated in selected groups of staff in company COOP družstvo HB. The purpose of my thesis is to compare which group of staff is threatened by burnout syndrome the most. The work is focused on the economical aspects which are reflected particularly in human capital. There will be applied the quantitative research, concretely questionaire research. Based on the results of questionaire research will be applied analytical method of the job evaluation, which is one of the main issues of human resources management. This application will be also recommendation for prevention for the company.
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Faktory ovlivňující poptávku po osobních automobilech v ČR
ČURILLOVÁ, Michaela
The bachelor thesis investigates factors which influence the demand for passenger cars in the Czech Republic. The theoretical part of this work is focused on basic terms and determinants which are important for the demand. Further it describes particular statistical methods, which are used for the analysis. The practical part contains the introduction to the automotive industry and the description of specific attributes of the demand for passenger cars. This part analyses factors which may have an effect on the demand for passenger cars in the Czech Republic. The main factors and the dependence are explained by applying econometric methods. Analyzing reveals these important factors: number of registrations of passenger cars, consumer prices of new and used passenger cars, consumer prices of fuel, population and income.The conclusion contains the summary of impacts on the specific demand.
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Project management in selected company
POKORNÝ, Radek
This work deals with project management in chosen company. It has two parts. The first part is theoretical, which is focused to theoretical treatment of the subject. It explains what is the project, management of projects, organizations of projects, processes of project management, what is target of project, communication, control, changes and risks and more. In the practical part I focused to concrete company and project management and than I analyzed concrete project. Name of the mentioned company is OHL ŽS, a.s. It is company from Spain, which acts all over the world. In the Czech Republic has the base in Brno. This company has several divisions and every of them is focused to different professional architecture. I have chosen division of structural engineering. This division builds all kinds of buildings. It could be construction of new buildings or reconstruction. To analysis of chosen project I used various business documents, contracts with investor or suppliers, document which include billing, timetable. I especially used my experience with projects of this company, and I was part of this project. Name of this project is Reconstruction of cladding including replacement windows and insulation. During the analysis of project I found a couple major gaps. If we could avoid these gaps, we could increase profit. These graphs is especially in management. At the beginning there were appointed two temporary construction managers. They doesn't care about result project, because they knew that they will not be to the end of the project. These gaps are because there is missing motivation system. Project manager can´t affect results of employees. It doesn´t depend on performance of employees, they always has the same wages. For elimination of these gaps I proposed several suggestions for improvement. The first suggestion is modification and extension of motivation system. New motivation system include personal evaluation. This evaluation depends on performance of employee. The second part is bonus from over profit. The next suggestion is make a new working position. This position would take care about controlling and project documentation. During the building project, especially at the end is construction manager very busy. It depend of decision of construction 63 manager what kind of activity will have prefer. Project documentation and administration or controlling of building works. If they are doing everything correct and technology are respect. Suggested position would take care about invoices, real work, which is done, project documentation, controlling of budget. The third suggestion is purchase of small machinery such as chipping hammers and drills. At this time they rent all devices. Rent is higher than purchase price. The last suggestion is use credit to restoration of fleet. At this time they have obsolete fleet, because the bought all cars by cash. It is not conveniently.
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The after-care management of patients with cardiac arrhythmia after a discharge out of the cardiac care unit.
JANÁSOVÁ, Věra
Heart rhythm disorders alias arrhythmias rank among the most frequent heart diseases. They result from a disorder of generation or conduction of electric impulses at the heart. There are often arrhythmias of which one is not conscious and which may be detected in long-term ECG monitoring. Patients{\crq} problems mostly arise from rhythm disorders that are paroxysmal or permanent. These may endanger the patient{\crq}s life. Subjective troubles reported by patients include uncomfortable heart palpitation, fatigue, breathlessness, distress, shorter breath, dizziness or even unconsciousness; sometimes patients may feel unpleasant chest pain. These subjective feelings are very uncomfortable for a person suffering from heart arrhythmia and can make it impossible for him/her to manage routine daily activities. The task of a nurse is to help a patient overcome this difficult period and instruct him/her of a healthy lifestyle as a prevention of heart diseases. In this respect, cooperation between the nurses in hospitals and the nurses in cardiologic out-patient departments is important. Four hypotheses were raised. The first hypothesis was to confirm that the care of patients with heart arrhythmia after their discharge to home-care is sufficient in respect of their needs. This hypothesis was confirmed. The second hypothesis was to confirm that the patients are sufficiently instructed on prevention of recurrence of heart arrhythmias. This hypothesis was not confirmed. The third hypothesis was to confirm that patients know the impacts of heart arrhythmias on their overall health state, and was not confirmed. The fourth hypothesis was to confirm that patients are aware of other options of the care after discharge from hospital. This hypothesis was not confirmed. In the practical part of the thesis I used a quantitative research. The research was conducted in hospitals in České Budějovice, Jihlava, Plzeň and Prague, in the form of anonymous questionnaires distributed to patients in cardiologic out-patient departments. The results have been processed in charts and tables in the SPSS programme. The objectives were fulfilled. The appendix to the thesis contains a brief proposal suggesting on what the nursing care should be focused after a patient{\crq}s discharge from hospital. The results will be offered to deputy managers for the nursing care and to nurses in cardiologic out-patient departments.
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