bluuebunny/crossref_metadata_2025 huggingface dataset:
Quantum Satellite Telecontrol System
Authors: Zhou Cheng Hong , Liu Yi , Qian Wei Ping
Published: February 2014

In this article, we first review the classical satellite telecontrol system, including space-ground closed loop comparison system, and analyse the insufficient from the perspectives of security and reliability. Subsequently the development of quantum communication is summarized, besides, the advantages of quantum communication used for satellite telecontrol is expounded. Finally we put forward a simplified quantum secure direct communication protocol for satellite telecontrol and discuss the quantum telecontrol system for further development.
Controller Design for See-Saw Systems
Authors: Wang Hai Yan
Published: February 2014

The control theory has widely application in many fields such as industrial and agricultural. A class of see-saw system model will be studied in this paper. Using the theory of pole assignment, we will design the state feedback controller, such that the closed-loop system is asymptotically stable. At the same time, using the tool of MATLAB, the model of closed see-saw system will be simulated and analyzed. It reveals the state regularity of see-saw system.
Second Order Two-Scale Method for Composite Plate with 3-D Periodic Configuration under Condition of Coupled Thermoelasticity
Authors: Wang Zi Qiang , Cao Jun Ying
Published: February 2014

In this paper, we give a second-order two-scale (SOTS) computational method for composite plate with 3-D periodic configuration under condition of coupled thermoelasticity by means of construction way. Based on the Reissner-Mindlin deformation pattern and integral projection operator of temperature, the homogenization solution is obtained. The SOTS's approximate solution is constructed by the cell functions and the homogenization solution. A set of numerical results are demonstrated for predicting the effective parameters, the displacement and temperature of composite plate. It shows that SOTS's method can capture the 3-D local behaviors caused by 3-D micro-structures well.
Sorting Method Based on Rough Sets and its Application in Comprehensive Evaluation of Smart Grid
Authors: Liang Wei
Published: February 2014

In view of some problems existing in smart grid comprehensive evaluation, such as subjectively determined weight, and the evaluation results strong dependence on the index weight, rough set theory is introduced into this paper because of its objective characteristics in handling multi-attribute decision problems, which can also avoid determining the index weight and data discretional processes. Firstly, the sorting method based on rough sets is improved to overcome the shortages of existing methods, and then the improved sorting method is used in the smart grid evaluation process. Comprehensive evaluation results are shown by examples, with comparison and analysis to other sort method. It shows that the proposed method is reasonable and practical.
Model Predictive Control with on-off Input and its Application to Attitude Control
Authors: Yang Bao Qing , Zhang Xi , Wu Kai Ning
Published: February 2014

Robust model predictive control with On-Off input of system is researched in this paper. The constraint tightening approach is adopted to ensure robustness of algorithm. By variable horizon approach, i.e. take the predictive horizon as the decision variable, the property of finite-time arrival within an arbitrary target set is guaranteed. Convergence of the algorithm is proved, and the maximum predictive horizon for the states entry to an arbitrary target set is determined. Finally, the method is applied to the attitude control of exo-atmospheric aerocraft, the simulation results show the effectiveness of the proposed method.
Analysis of Stability of Hopfield Neural Networks and Design of Impulsive Controller
Authors: Liu Yong Jun , Qin Peng
Published: February 2014

Based on the proper Lyapunov functions and the Riccati liner inequality, the Robust H-stability of Hopfield neural networks with impulsive effects is studied and some sufficient conditions for robust H-stability are established, the impulsive stabilization criteria can be verified by the impulsive controller, simulation validate the main results.
The Traceable Data Collection and Transmission Methods for Poultry Processing Quality
Authors: Niu Xiang Jie , Wang Yu Jie , Li Hua
Published: February 2014

By analyzing the poultry product processing procedure, this paper proposes the system design of a kind of poultry processing quality traceable data collection and transmission system and the details about the system hardware and software design. The system builds the data collection nodes platform which solves the data diversity issues. Based on the features in the production procedures of the poultry production enterprises, the system designs the datasets to ensure the connection among the servers and the end clients, and the connection among the servers and collection nodes to solve the issue of trace time. The system test illustrates the system can ensure the high accuracy of the data collection and transmission in the poultry production and circulation with practical values.
The Design of Shafting Condition Monitoring System for Rotating Machinery Based on Fiber Bragg Grating Sensor
Authors: Qiu Fan , Liu Quan , Li Jing Song , Zhang Fan
Published: February 2014

FBG (Fiber Bragg Grating) is especially suitable for the shafting operation condition monitoring of rotating machinery under the harsh working environment for a long time with its advantages of anti-electromagnetic interference, easy reuse, good stability, environmental adaptability and so on. The overall architecture of the shafting operation condition monitoring system based on FBG sensing network is proposed. In the system, FBG multi-channel distributed sensing network is used to fully apperceive the real-time operation condition information of the equipment. While the Windows Presentation Foundation (WPF) and 3-Dimensional Studio Max (3DMAX) technologies are used to realize the intuitive 3-Dimensional (3D) virtual display to monitor the equipment. Besides, the sensing information data stream is processed in real time to display the running state of the equipment. Also, mass sensing information is analyzed and stored by the real-time processing method. The stability and reliability of the proposed framework and key technology is verified by the system long-time implementation results.
Remote Video Web Monitoring System Design of Port Coastal Ships Based on UDP
Authors: Song Zhi Peng
Published: February 2014

In order to improve the monitoring efficiency of port coastal ship, and improve the ability of coastal management, the port coastal ships web remote video monitoring system is designed and realized. The GPRS/UDP technology is used to transmit the ship videos to the server in real time. The client terminal and visual monitoring terminal are established, and the ship monitoring personnel can enter the WEB monitoring platform with different permissions. The network browse module, scheduling module, monitoring terminal module are designed, the port coastal ships video data are monitored and processed, the automatic alarm module based on the density ratio is designed. The intelligent early warning of port coastal ships density is obtained. The application experiment is implemented on the port coastal entrance, experiment results show that this system can realize the remote video Web monitoring of ships and intelligent early warning, and it has good effect in application.
BP Neural Network for Mobile Robot Self-Tuning PID Controller Design
Authors: Li Wei , Fang Jian
Published: February 2014

Establish the attitude model for self-designed mobile robot, According to the characteristics of nonlinear, unstable, using BP neural network method to achieve self-tuning PID parameters to make optimal parameters of the PID controller. Stabilization control of two-wheeled self-balanced robots at the same time, decrease the overshoot of the system and the number of shocks. Simulation experiments show that: Using BP neural network self-tuning PID controller improves system stability, effectiveness has been well controlled, with high practical value
Control Algorithms and Circuit of Interactive Mechanical Bionic Intelligent Robot
Authors: Huang Ying
Published: February 2014

According to the mechanical simulation intelligent control theory, and combining the character interaction principle, the use of genetic algorithm carries out an in-depth analysis and research for the process of PC MCU automatic control, and then the control algorithm of interactive genetic is established, finally we design the VGA structure circuit. In order to validate the validity and reliability of the model and control circuit, this paper uses the medical micro robot as the research object to the experimental analysis for the delay control circuit, so the delay characteristic curve will be obtained. By the control of time delay curve, we can be seen that the scanning delay of controllable voltage can control delay in the range of 22ps-60ps, it meets the design standards, to provide the theory reference for the mechanical bionic intelligence automatic control research.
Research on Elimination of Electric Power System Fault Based on Electrical Engineering Automatic Control Technology
Authors: Ran Sheng Yi , Xiong Yu Shu
Published: February 2014

In this paper we introduce the computer software fault analysis system to the power fault detection system, and design power fault elimination system of electrical engineering automatic control, and do simulation and experimental study on the performance. When using the turbine blade of electric machinery to detect fault, we can get the automated troubleshooting displacement curve, and using computer simulation to get the electric mechanical stress distribution nephogram. To further verify the effectiveness of the algorithm, we test the frequencies for eight different units, and obtain eight different sets of five order fault diagnosis frequency, and draw the frequency spectrum distribution of frequency response. It provides the theory reference for the automation of power system fault exclusion.
Design and Study of Master-Slave Fast Online Monitoring System Based on the PC MUC
Authors: He Long
Published: February 2014

Based on the independent variables normalized mathematical thought and the combination of PC communication technology, this paper designs master-slave fast online monitoring system, the system includes computer control system, PC single chip communication system and intelligent robot system. In order to verify the validity and reliability of the system, the system is applied the online monitoring experiment of GMAW welding droplet spray process, to detect the shoot down process parameters. Finally, we get the heat flux density with the change curve of distance and voltage current, to provide a reliable experimental data for the design of intelligent automation welding process.
Mathematical Model and Algorithm Design of Computer Random Dynamic Nonlinear Force Detection
Authors: Ye Chun Juan
Published: February 2014

According to the principle of random computer nonlinear measurement, the partial differential mathematical model of computer stochastic nonlinear dynamic force signal detection is established by using multi sensor control, which can establish the computer mechanical signal detection and analysis system of the complex force detection. In order to verify the validity and reliability of the system, this paper depends on the mechanical characteristics detection of volleyball player movement process as an example, to monitor the force signal for the process of volleyball players. Through the elastic-plastic stress signal analysis, we find that when the sensor is spiral distribution, the distribution of power spectrum will be relatively stable; when the sensor is 8 shape distribution, the size of the force will be relatively stable between 18N and-18N. However, the spectrum analysis is not stable, and it agrees with the theory trend of mechanics calculation, to verify the rationality of the algorithm.
Abnormal State Identification for T Beam Based on Novelty Detection
Authors: Wang De Yan , Wang Tao , Liu Li , Gao Yan
Published: February 2014

The cracking state and abnormal positions are recognized during T beam model tests using the BP neural network based novelty detection technology. Neural network training sample data is generated by analyzing the static load test data, the neural network model based on novelty detection technology is established, the state of the T beam anomaly recognition and crack position recognition is accomplished. Stepwise partition method is used in crack position recognition, which includes narrowing the crack position as the first step, specifically analyzing the sensor data, and determination of the crack position. T beam neural network model is verified by the measured data. The results show that, the method can accurately identify state and effectively identify the location of the crack.
Score Model Based on Forward-Reverse Databases for Phosphopeptides Identification
Authors: Chen Xiao Zhou
Published: February 2014

Identification of phosphorylated peptides takes into account factors relevant in matching, building models, and score algorithms. In the paper we make a detailed comparative analysis among various phosphorylation identification methods, and study current mainstream algorithms in database searching and identification, and compares various aspects and methods of algorithms in site assessment. Based on the theory of forward-reverse databases searching, It is proposed a new score model to ensure the quality of identification. Our result shows that PTM and Mascot score models were strongly correlated and complementated in their differentiation abilities. Therefore, PTM and Mascot score models can be combined to filter peptide.
The Design and Implementation of Virtual Digital Oscilloscope
Authors: Qu Ai Ling , Liu Hong Mei , Lv Yan Ling , Han Ru Kun , Liang Qiu Yan
Published: February 2014

The virtual instrument is the computer-based instrument. The close integration between computer and instrument is one important instrument development direction. The virtual digital storage oscilloscope introduced in the paper has some additional functions except the common oscilloscope functions, its additional functions are spectral analysis, parameter automatic measurement, complex conditions trigger and data storage. The virtual digital storage oscilloscope communicates with the PC software through USB port. The paper discusses the overall design ideas of virtual digital storage oscilloscope, and the composition and functions of the circuits.
Research of Gear Fault Comprehensive Diagnosis Method Based on Analysis of Vibration Signal
Authors: Lv Zhan Jie , Xu Wen , Tang Gui Ji , Han Guo Dong , Wan Shu Ting
Published: February 2014

For gearbox common type of fault, leads to common methods gear fault diagnosis, according to the various parameters of the gearbox, to give a gearbox fault frequencies. Using mat lab signal analysis, by the time domain analysis, frequency domain analysis, cestrum analysis, signal processing methods envelope spectrum consolidated results there is a fault in the gearbox countershaft. This papers they have certain significance to gear fault diagnosis.
Fuzzy Control Based Study on Energy Management System of Electric Vehicle with Dual-Energy Storage System
Authors: Huang Zhi Yu , Pu Xiao Hua
Published: February 2014

Regarding to the electric vehicle (EV) with dual-energy storage system (DESS) composed of batteries and ultra-capacitors, study on the structure and drive modes of DESS, after a detailed analysis of energy storage system based on power, resistance and constraints in driving, establish a mathematical model of energy management system of EV with DESS, and an energy management based on the fuzzy control strategy is designed. Finally, a simulation of EV with DESS by using ADVISOR simulation platform is studied, whose results show that the EV with DESS based on fuzzy control strategy can be more effective in distributing power between energy storage systems, and the dynamic performance as well as economic efficiency are also improved
Based on Analysis of Fast Simulation Algorithm for Multi-Objective BVR Attacking Fire Control System
Authors: Ji Yi Guo , Tao Zhong Xiang , Chen Cui , Lan Zhi Huan , Tian Chun Yan
Published: February 2014

With the continuous improvement of fire control system functions to further improve the performance of missile weapons, combat aircraft requires BVR combat capability, multi-objective BVRAC will be the next major form of combat and trends. This article will fast simulation algorithm is applied to multi-target attack fire control system design, we propose a multi-target attack BVR fire control system design. Simulation results show that: the design of high precision, calculation speed, fully meet the requirements of real-time speed and airborne weapons systems.
Research on Real-Time Monitoring System for Traction Motor of EMUs
Authors: Zhang Lin Ji , Zhu Qin Yue , Shen Ze Hao , Lv Pei Pei
Published: February 2014

A multi-function, easily extensible and portable tracking and monitoring system is designed for traction and drive system to meet the growing requirements of high-speed EMUs, which is increasingly complex for real-time monitoring system. The design principle of the embedded hardware system based on the modular structure of CPCI bus is presented in details, and the realization of software functions such as on-line real-time data processing, offline data analysis, and human-machine interaction is put forward on the basis of LabVIEW development platform. Furthermore, the VI design and scheduling mechanism based on state-machine are elaborated, and the measurement algorithm and its implementation of the traction motors input power and constantly changing signal frequency of the monitoring system is also analyzed. The system has been applied in certain models of the high-speed EMUs, and its stable operation, flexible settings, high accuracy and good application effect makes it provide a scientific guarantee for the safe operation of the high-speed EMUs.
Design on Mathematical Model of Genetic Algorithm Based on Artificial Intelligent Control of Mechanical Simulation
Authors: Lu Chun Yan , Li Jian Cheng
Published: February 2014

Based on the multimedia control theory, the mechanical bionic intelligent control is studied, and this theory is applied to the subjectivity analysis of college students employment to establish the mathematical model of mechanical bionic intelligent control, and to design automatic control algorithm. In order to validate the effect of mathematical model and algorithm, this paper compares the designed adaptive algorithm with 3 kinds of traditional genetic algorithm. From the calculation, we find that the adaptive algorithm in the fitness value of the solution and the mean is obviously better than that of the traditional genetic algorithm. While for the search of the optimal solution, the adaptive algorithm is fast and has high precision. The crossover and mutation rate of 20-100 generation calculation results show that the mutation rate is controlled within 0.1, which can meet the design requirement of accuracy, and can provide a theoretical reference for the study of mechanical automation control theory.
The Elastic Component Design for Measuring Internal Grinding Force
Authors: Mu Cun Yuan , Huang Teng Da , Guo Teng Fei
Published: February 2014

Take M210 internal grinder as an example, design a sensors of measure internal grinding force that not affected by vertical feed, determining the basic dimensions of the elastic element, analyzes the elongation of elastic curve after two fixed beam bending, the force of the elastic member is analyzed. The relationship of grinding force and parameter is established, it can be the reference of relevant manufacturing technology.
The Development of Profibus/Modbus Gateway in Aluminum Roasting Draught System
Authors: Lin Yong Jian , Zhong Guo Wen
Published: February 2014

In the implementation and design of the industrial control system, due to the difference between various processing equipment manufacturers, the communication protocol is not compatible with the existing systems or equipments that greatly reduce the process operation efficiency and the production efficiency of enterprises. This paper introduces the gateway communication between Siemens S7-400 PLC and the flue gas purification air subsystems in roasting, as well as gives a detailed discussion on communicational gateway board between Profibus-DP and Modbus-RTU, as well as the embedded software development.
Alternative Way of Thermal Protection by Thermal Barrier
Authors: Doležel Miloslav
Published: February 2014

The main objective in building constructions is reducing energy consumption and increasing the proportion of renewable energy sources. We can find the various ways of reducing energy consumption, where the most used method is passive thermal protection and thus increasing thermal resistance of structures. There are also ways of active thermal protection, where one of the new ways is the system of TB (thermal barrier) using renewable energy sources to reduce heat loss through non-transparent parts of building envelope. It is one of the new types of thermal protection and there are not available clear rules for the design of the structures with TB and there are not quantified energy savings compared to buildings without a TB. TB decrease heat transmission only through opaque constructions, what is only one part of the total heat loss and thus is questionable payback period and primary energy consumption of TB system compared to the standard buildings. The paper is focused on comparison of temperatures in the wall construction with and without TB system and determining the external temperatures at which it is appropriate to apply a construction with TB.
Determining Cumulative Room Temperature under In Situ Conditions Using Combined Method
Authors: Flimel Marián
Published: February 2014

Cumulative room temperature θM is one of the qualitative indicators for assessing internal environment of buildings in relation to the thermal comfort. The theoretical calculation of the cumulative temperature for heating or summer season is known. Assessing the value under in situ conditions is possible in operating mode of an empty room or with the inhabitants using the appropriate measurement devices. Determining the mean surface temperature of constructions bounding the room appears to be a tough problem. Therefore an infra-red method for assessing the mean surface temperature of a surface has been chosen. The paper describes the combined method application procedure (air temperature measurement method + infra-red method thermography), as well as an example of its application.
Energy Design by Evolution: Applying Evolutionary Computing to Energy Efficient Architectural Design
Authors: Sommer Bernhard , Pont Ulrich
Published: February 2014

In this paper, the authors want to show a method that allows customizing energy efficient buildings to the very task and to the very site by linking environmental data and design strategies through algorithmic processes. An optimum solution for the energy efficiency of a building can then be found by running an evolutionary solver.
Experimental Measurements and Numerical Simulations of Dynamic Thermal Performance of External Timber Frame Wall
Authors: Skotnicova Iveta , Galda Zdenek , Tymova Petra , Lausova Lenka
Published: February 2014

The aim of this article is to contribute to the summer thermal performance of external timber frame wall by the simultaneous use of experimental measurements and numerical simulations. The measurements were taken on an experimental timber frame passive house. The numerical modeling of the external wall using a dynamic simulation program ANSYS. The results of research are presented and discussed. It is shown that the numerical simulation methods are suitable tools for the prediction of thermal behaviour of light-weight timber-based construction.
Impact of Façade Colouring on Temperature and Light Conditions of Buildings, Housing Estates, and Environment
Authors: Pašek Jan , Bošová Daniela
Published: February 2014

Design of the color solution of the façade is usually focused only to achieve subjectively desirable aesthetic look of the building. In the whole context it however has many other connections including the environmental one. From this point of view it is very inappropriate to use dark colors with high absorption of solar and diffused radiation. This paper is focused on the influence of the color of the façade surface on the external and internal surface temperature of the external walls, temperature of the air in their surroundings, and day lighting of the interior.
Numerical Analysis and Measurement Results of a Window Sill
Authors: Katunský Dušan , Zozulák Marek , Kondáš Kristián , Šimiček Jozef
Published: February 2014

Window sill of brick walls is one of the most critical places in a connection of two envelope types objectively. If there are the transparent and opaque parts present together, the connection is much more complicated. Different behavior of the construction materials in dynamic boundary conditions causes deformations of thermal field of the window sill detail. Numerical thermal field analysis verified by the experimental measurement in experimental outdoor chambers is used for recognize the real heat-air-moisture behavior in the various constructions.
Optimization of Swimming Pool Hall's Envelope with Respect to Thermal and Moisture Design
Authors: Jelínek Petr , Krupicová Jana , Petricek Tomas
Published: February 2014

The operation of swimming pools inside of the currently very popular water parks is because of the characteristics of indoor climate quite specific. An integral and also fundamental part of the project documentation of these types of buildings is certainly the thermo-technical assessment and the design of the buildings envelope. The designer has to deal with high temperature and relative humidity in the interior, which requires a detailed design of external structures including the roof structure. In particular it is necessary to pay attention to critical details. The paper deals with issues connected to the thermo-technical design of compositions of swimming pool halls envelope with respect to acting legislations and external boundary conditions valid for the Czech Republic, as much as it optimises the design solutions also in terms of technological and economical. The result of such a design activity should be a functional envelope which is easy to maintain and has a long life span.
Energy Consumption and CO2 Emission of Buildings Built with Industrialized Technology: The Case of Debrecen and Future Trends
Authors: Csoknyai Tamás
Published: February 2014

The residential buildings built with prefabricated technology (also called panel buildings) represent a significant part of the building stock, particularly in Eastern Europe. These buildings are typically 30-40 years old and due to their poor energy performance they have been in the focus of energy policy makers over the recent years. These buildings are typically connected to district heating systems and the continuously decreasing heat demand caused by the renovation subsidy programs resulting in risks of inefficient operation and on the long term it questions the viability of the district heating systems. Therefore it is particularly important to have a clear picture on the energy consumption trends about this segment of the building stock. In this paper, the building stock of the city of Debrecen connected to district heating is analysed. The current energy consumption figures of the buildings are analysed. In Debrecen, the share of retrofitted buildings is relatively low (appr. 15%), therefore a future trend analysis was also carried out. The results of this study can be interesting for other cities as well, particularly those with a significant share of “panel buildings”.
Thermal Properties of Wooden Buildings in Relation to Computer Software
Authors: Kučerová Lucie , Černíková Marcela , Hrubá Barbora
Published: February 2014

The increase in energy prices resulted in the formation of new houses in the low-energy and passive standard. In particular, the development of wooden buildings in recent years has experienced a boom. More and more, their positive qualities come to the attention of potential investors. Thanks to this the new technologies of construction are still developed and the new wood-based materials tested. The continuous improvement of the thermal insulating materials and as well as technical equipment of buildings such as ventilation, heat recovery, solar and photovoltaic systems is recorded. All of these materials and technologies must follow the standards which tightened the thermal technical requirements. This led to the sophisticated compositions of individual structures and the use of better materials. Not always declared properties of the materials or construction planners are designed in accordance with the calculated values. In practice there is often ill-composition design of the construction or improper assembling of wooden parts which may result in an increase in thermal loss of the building, disturbed microclimate inside the building, but also negatively affecting the lives of individual structural units which implies that we should deal with these problems significantly.
A New Type of Heat Exchanger for Ventilation in Buildings with Nearly-Zero Energy Consumption
Authors: Horák Petr , Pavel Adam , Ambrožová Iva
Published: February 2014

This article describes a new type of hollow-fiber heat exchanger that provides similar heating performance to conventional metal heat exchangers commonly used in air conditioning systems but at lower cost and greater simplicity. While factors such as fragility and element fouling have yet to be optimized, the exchanger shows great promise for application in buildings aiming at close-to-zero energy consumption.
Natural Ventilation and Forced Warm Air Ventilation in Offices
Authors: Budiaková Mária
Published: February 2014

The paper is oriented on the natural ventilation and forced warm air ventilation systems in offices. The basic element of natural ventilation system in office building is double skin facade. The natural air circulation is undertaken by the right shaping of vertical shafts for exhaust air. Furthermore, the intelligent double skin facade in transitional period contributes to the heating and in summer to natural cooling of offices. Therefore, the forced warm air ventilation, which is provides heating of offices, can operate in saving mode and can be supplemented by radiant floor heating. By the effort to approach to zero energy balance, it is important to undertake thermal comfort. Therefore, I did experimental laboratory measurements for forced warm air ventilation and I also did it because of comparison for radiant floor heating. In this paper, I will present scientific analysis and the outputs from my own measurements. In the conclusion of this paper on the basis of outputs of experimental measurements I will define the principles for designing forced warm air ventilation and radiant floor heating in offices.
Analysis of Summer Overheating in Elementary School Building
Authors: Kamenský Martin , Lopušniak Martin , Katunský Dušan
Published: February 2014

In elementary school buildings, a risk of summer overheating occurs due to large windows which secure and high quality of daylight. It leads to large solar gains. The article analyzes an effect of sun-shading design interacting with ventilation modes for the internal air temperature. Analysis was done with simulation calculation. Results show that the maximum temperature does not fall below θai = 28°C in any case of all alternatives and combinations. In this case, cooling is necessary.
Comparative Study of Window Glazing Systems Influence on Melatonin Secretion in Patients in the Hospital Wards
Authors: Hraška Jozef , Hanuliak Peter , Hartman Peter , Zeman Michal , Stebelová Katarina
Published: February 2014

The interest in the research of non-visual effects on human health has risen during last decade rapidly. Daylight that has humans during our evolution adapted to is considered as healthy in its natural form. In reality, the daylight inside the buildings can be different in many parameters from the exterior one. Not only intensities and spatial distribution is altered, but also spectral composition can differ significantly. Daylight transmitted through transparent elements in buildings envelope and its shading devices is filtered and therefore can have different photobiological quality compared to the daylight in exterior. Effects of the altered light conditions can have negative impact on health mostly by people that spend time continually or permanently in those internal spaces, such as long term hospitalized patients in medical facilities. The aim of the research was to find out, whether the dramatic change in the transmittance of daylights blue component will evoke the change in melatonins secretion in patients urine samples. Despite great level of circadian disruption of observed subjects a typical changes in melatonin secretion were observed as a result of altered spectral transmittances due to different glazing systems.
Design as a Tool for Environmental Therapy in the Fight against Lifestyle Diseases
Authors: Hofbauerová Adriana
Published: February 2014

The environment in which we live and quality of internal spaces affects the quality of life, which impacts our vitality, life strategy, and thus the overall health of the society. Consequently, there is a need for an environmental design as a tool for prevention and treatment of lifestyle diseases. The genesis of these diseases is caused by several risk factors, including some problematic space negatives. By their identification and suggestion to optimize the internal environment, interior design can significantly contribute to the development of healthy interior and body conscious design. From this point of view, the interior design becomes veritable resource for environmental therapy in the fight against lifestyle diseases.
Analysis of Energy and Internal Environment Improvements in a Single Family House
Authors: Kamenský Martin , Vaskova Anna , Vertaľ Marián
Published: February 2014

The next step in energy efficiency building design focus on near energy zero buildings. To design such buildings is important to understand how people use low energy building and to find reserves in energy. The paper presents an analysis of reserves in a family house. The analysis is done with simulations of different design and operation solutions based on knowledge from in situ measurements. Results show there are reserves in the heating and cooling period of year, which can lead to further energy savings of up to 15% and internal environment improvements.
Interior Environment of the Buildings Hit by Floods
Authors: Pašek Jan , Tribulová Tereza , Frankl Jiří
Published: February 2014

Deterioration of the quality of interior environment is always consequence of buildings being hit by floods. The structures and the furnishing of the buildings are exposed during such event to moisture and contaminants carried by the floodwater. Comprehensive evaluation of the effects of floods on buildings is very difficult due to influence of large number of factors, which may be mixed in infinite number of varieties. This paper is focused on analyses of the most important factors influencing the quality of the interior environment of the buildings when flooded the characteristics of the building structures, furnishing and floodwater.
Shading by Surrounding Obstacles
Authors: Hlásková Michaela
Published: February 2014

Shading by surrounding obstacles is one of main parameters which must be considered in building design. The aim of this paper is elaboration of the façade Daylight Factor (Dw) and shading angle problems defined in the Czech Technical Standards (ČSN) - Daylighting in residential buildings ČSN 73 0580. The measure of Dw represents the value of incidental shading by surrounding obstacles. Sometimes in practice are designers dealing with administrative requirements of officials because of not exact specification of conditions in building law and consequently in ČSN. Because of not exact specifications is happening that officials are requiring requisite assessments. Such issue occurs sometimes also in problem of Daylight Factor Dw – it is not exactly determined when is an assessment of Dw necessary. This paper focused on the definitions mentioned in building law and ČSN related to this issue and proposes specific conditions for eventual Dw assessment.
Sunlight Penetration through Sloped Window Apertures
Authors: Kondáš Kristián , Darula Stanislav , Zozulák Marek
Published: February 2014

Indoor illuminance levels vary frequently during the day due to the presence or absence of direct sunlight, cloudiness and content of atmosphere. In spaces equipped with roof windows these illumination effects of direct sunlight are more remarkable than in more common designed rooms with vertical windows. To study these effects the variable in form of orientation in relation to cardinal points, can be used and obtained different sizes of an area on a working plane directly illuminated by sunlight. This contribution presents a study of the impact and effects of direct sunlight, penetrated trough sloped window apertures on the working plane.
Indoor Environment and Energy Performance of Office Buildings Equipped with a Low Temperature Heating / High Temperature Cooling System
Authors: Petráš Dušan , Krajčík Michal , Bugáň Jozef , Ďurišová Emília
Published: February 2014

Energy performance and indoor environment were investigated in two modern office buildings equipped by a low temperature heating and high temperature cooling system. Both buildings have the facade made of glass. In the first building, radiant panels are suspended under the ceiling in order to create comfortable conditions, natural gas boilers are the installed in order to generate heat and chillers are used to generate cool. The second building has heat pumps installed to provide the building with heat/cool and capillary pipes are embedded in the plaster on the ceiling surface to emit the heat/cool into the occupied space. The energy performance was calculated in accordance with the set of CEN standards for energy certification and is presented in the form of energy certificates. Thermal comfort and indoor air quality were experimentally studied by long-term and short-term measurements and through questionnaires filled in by the occupants themselves. The study has shown that the low temperature heating/high temperature cooling system has the potential to create a comfortable indoor environment at low energy consumption, but the ability of the heating/cooling systems to do so is closely related to the appropriate control of the systems.
Building Physical, Energetical and Hygrothermal Analysis of Earth-Sheltered Building Constructions
Authors: Dudás Annamária , Farkas László
Published: February 2014

Covering soil layer significantly reduces the heat loss of earth-sheltered building elements. Quantity of heat loss is highly influenced by the thickness of soil on examined building constructions. Based on the above mentioned facts an earth-sheltered sample building was designed. Ecological designing principles (recycled building materials and passive solar designing rules) were taken into consideration during planning of examined residential house. The building structures are general solutions, the earth-sheltered characteristic manifested by soil-covered elevations and green roof. The detailed energetic calculations are based on the linear heat transmission coefficient, which serves as a numerical definition of the heat bridge effect. Linear heat transmission coefficients were calculated as simulational results that can be derived from the finite element modelling of structural intersections. Detailed building simulations represent the advantages of soil covering. Hygrothermal analysis of building constructions based on their thermal simulations is essential. Due to the intensified waterproofing of earth-sheltered structures vapour diffusion is considerably reduced. At the same time environmentally conscious design prefers diffusion open orders of layers. Hygrothermal calculations of different waterproofing materials can categorise the environmental friendly solution of the protection.
Correlation Relationships between Properties of Brick Body and their Use in Building Practice
Authors: Šveda Mikuláš , Sokolař Radomír
Published: February 2014

The regular exit check of the brick products is an important step as to meet the quality in brickworks. These products are characterized by pore and lightweight brick body, therefore, their physical properties depend primarily on the specific characteristics their pore structure. We can determine on the basis of one well-known property and the correlation relationships other characteristics of the brick body, since there is an assumption that these properties between themselves "connected". Authors propose to use this knowledge in the exit speed check directly at the factory. In this case could be monitored only one property and one that can be quickly and reliably determined, such as thermal conductivity of using an apparatus Isomet. It is then possible to set for the existence of a correlation function between thermal conductivity and compressive strength of brick body at regular intervals compressive strength without using a hydraulic press.
Application of Phase Change Materials to Reduce the Risk of Overheating of Building Interior
Authors: Klubal Tomáš , Ostrý Milan , Brzoň Roman
Published: February 2014

People in the developed world require comfortable indoor climatic conditions. In the summer time there is often risk of the overheating of buildings, especially buildings with lightweight envelope.
Requirements for interior temperature are not summarized in one piece of legislation, but parameters of indoor environment are set according to the type of using of internal space by various laws, regulations, standards and other regulations. Passive cooling can maintain a state of indoor environment in the required temperature range in accordance with legislative framework. Presented system uses phase change materials as a latent heat storage medium for better absorption of heat. The tested system combines the latent heat storage material in the form of micro pellets, which are dispersed in the gypsum plaster, and capillary cooling for their activation so that the secondary effect is possibility of a direct radiant cooling of the room.
The Dispersion of Acoustic Energy in the Dissemination from the Source
Authors: Dlhý Dušan , Pernišová Alena
Published: February 2014

Methodology of the way of supposed sound levels calculations in closed objects areas from the sound sources is based on assumptions, that the propagation of sound is dominant. In many cases the acoustic properties of space of sound propagation have great importance. We have to take in the consideration - the size and cross-section areas of dispersion bodies, their sound absorption coefficient; - shape of area and boundary areas absorption; - position of concerning point in relation to the source position in space; - noise of technological equipment and relatively other coefficients that may effect the sound energy propagation.
Fire Risk in Relation to BIM
Authors: Fridrich Jan , Kubečka Karel
Published: February 2014

Technological advances in the field of technical coordination and simulation provides a new method in construction (BIM, Building Information Modeling). These methods will enable us to implement a risk occurrence of fire and its spread already in preparation of the building itself. Next message informs about the possibilities and what procedures can be implemented alone fire safety solutions to building information model. His subsequent use in design practice and streamlining the entire process.
The Effects of the Soils Thermal Field onto the Energy Performance of Buildings
Authors: Kacálek Petr , Petricek Tomas , Smolka Radim
Published: February 2014

The paper deals with the distribution temperature fields of soils at a real building object. These temperature fields are based on continuous (2 years worth of) measurements of temperature in certain depths of soils at a building structure.
When designing buildings the climatic data are applied for a specific area only. Albeit in case of soils temperature the data are rather general, all locations do have the same values. One factor that significantly affects the soil temperature, are the thermal parameters inside and outside of buildings.
The soils temperature is affected considerably by the structural solution used on a building, particularly in areas where thermal insulation is in contact with structures and the ground too.
Whereas in case of soils there are no coherent outputs of temperatures with dependence to the characteristics of external and internal environment as much as to the structural solution of a building, the main aim of the paper is to make an impulse for the creation of comprehensive temperature data packs for soils for predetermined depths, structures and parameters of indoor and outdoor environment.
Possibilities and Problems in Applying Decision Support Systems for Special Challenges in the Design of Building Constructions
Authors: Kapovits Geza , Dobszay Gergely
Published: February 2014

The objective of this study is to examine the possibility of using DSS in the engineering design of a special group of building constructions: 'cladded roofs'. These are roofs whose cladding is the same as the façade’s, giving buildings a homogeneous appearance. For architectural impression the roof is made of unusual materials and complex structures thus cannot be designed with traditional guidelines. The goal of using DSS is to facilitate and simplify the range of possible materials and structures, to assist and expedite finding the optimal version and to reduce the likelihood of design flaws. In addition to eco-efficiency in production, transportation, and energy consumption of buildings, we hold it to be important to reduce the amount of materials used to a necessary minimum. [1] To achieve this all materials should be used at places where their specific characteristics prevail most effectively. The criteria for applying DSS for ‘cladded roofs’ is the successful structuring of the necessary constructional data and variations. We propose a method to generate numerous proposed solutions and rank them based on their technical performance and value. The result is a kind of 'guided decision-making' which may be an important aid in the design of nonstandard structures.
Utilization of the Construction Waste
Authors: Prokopčáková Katarína , Prokopčák Lukáš
Published: February 2014

This post contains an analysis of the issue of the generation and management of construction waste, because the requirements for ensuring protection of the environment are more challenging for the qualitative properties of building materials, technological processes of construction, construction machinery and etc. The conclusion focuses on the most commonly used information from construction waste production
Application of BIM Process by the Evaluation of Building Energy Sustainability
Authors: Jašek Marek , Česelský Jan , Vlček Pavel , Černíková Marcela , Berankova Eva Wernerova
Published: February 2014

The use of building information modeling (BIM) in the Czech Republic is currently at the stage of being slowly established in the Czech building environment. From the viewpoint of applicability in the building industry, the issues of BIM in the Czech Republic are very desirable, mainly because of ever-increasing pressure on the sustainability of construction. This approach is gradually used by some, often multinational, construction companies. The article focuses on finding the possible optimization of approach to the planning and operation of buildings in terms of the energy sustainability of buildings.