European Journal of Technology and Design

28-34

Authors: Sergei A. Grigor'ev, Viktor I. Kostin, Aleksandr S. Grigor'ev

The article considers the aspects of power facilities on the basis of renewable energy resources with the use of electro-chemical systems with hydrogen store for energy accumulation. It was shown that energy storage in the form of hydrogen – high-efficiency energy source is considerably superior in capacity to traditional accumulator batteries and enables to smooth both daily and seasonal voltage variation from renewable energy resources.

42-47

Authors: Katline Koblev A. Julio, Konstantin N. Makarov

Wave transformation in the areas of submarine canyons through their reflections on slopes is considered. As shown by field observations, including the destruction of the protective breakwater sections of the port of Imeretinskiy, and laboratory tests, the height of the waves on the windward edge of the parapet of submarine canyons in oblique approach of waves can be increased by 30–50 % compared with the waves outside the canyons. A mathematical model describing these effects and can simulate the excitement of the field in the areas of submarine canyons.

54-63

Authors: Muhammad Khairil Aizad Senin, Md Azree Othuman Mydin

It should be pointed out that indoor climates in buildings is significant to the accomplishment of a building not only in making it comfortable, but also in deciding its energy consumption holistically and the thermal comfort of the occupants in the building. Thermal comfort can be defined as a psychological state of mind, often expressing a sensation of considerable heat or cold and it occurs when there is a balanced exchange of heat between a person’s body and the environment, marked by the absence of regulatory sweating. Thermal comfort is imperative in both psychological and physical aspect where it could affects morale of the people. Based on their degree of thermal comfort, residents may complain, productivity may suffer and in some situations, people may refuse to work in a particular environment. This paper will discuss thoroughly the concept of thermal comfort, effects of thermal condition on occupants and some of the significant factors that influencing thermal comfort. In addition, thermal transition between the external environment and internal spaces of the buildings, human body interaction with surroundings and effective comfort range will also be presented to get a clear picture on how thermal comfort affects the building occupants comprehensively.

70-76

Authors: Lev V. Utkin, Yulia A. Zhuk, Anatoly I. Chekh

A new feature selection algorithm for solving classification problems is proposed. The algorithm exploits the ensemble-based methodology and iteratively combines classifiers in order to assign weights to features characterizing their importance in classification. The algorithm is based on the joint use of a filter method and the well known support vector machine. Moreover, the filter method uses only support vectors instead of the total training set to calculate the feature weights. Numerical experiments with publicly available data sets show that the proposed algorithm improves the classification accuracy.