Spectral properties of quadruple symmetric real functions

AbstractThis paper examined the spectral properties of quadruple symmetric real functions. Theorem is formulated, under which the complex spectra of such symmetric functions are conjugated. The properties of the trigonometric functions are used in the proof of the theorem. Numerical results are presented for illustrating of the proven theorem

Some psychology and technical aspects of a rescue operation in the Musala peak region (Rila Mountain)

AbstractThis article describes the opportunity of using first order moments for locating an object in electromagnetic or acoustic field. For example, this problem may be useful in a disaster situation in a mountain. For saving the life of stricken people a rescue operation must be organized. The success of this operation depends on the information for the location of the people. Moreover it is very useful to dispose of some psychology information about the stricken persons. The emotional intellect quotients allow constructing a psychology portrait of the people in calamity situation. They also allow predicting the people's behavior in the disaster situation. Fourier spectra technique and power spectral density tool can be used similarly to predict the human psychology behavior in crisis event. The most detailed information in people's behavior prediction process can be obtain by using of multi inter personal field psychology model Ψ(x,y,z,t). A real rescue operation is described in the article. Emotional mask psychological model, intelligence and emotional intelligence quantities model and interpersonal field model are also described in connection with this accident in the report

A study of hydrogen fuel impact on compression ignition engine performance

In this paper, a dual-fuel compression ignition engine test bench is presented. In hydrogen-diesel fuel co-combustion conditions, the engine parameters are determined – performance: effective torque, effective power and mean effective pressure; fuel economy: fuel consumption and specific fuel consumption; toxicity: carbon monoxide, carbon dioxide, nitrogen oxides, hydrocarbons, and smoke emissions (opacity). The impact of hydrogen-diesel fuel mass ratio on the performance, toxicity and economy of the engine is studied by obtaining a series of hydrogen-diesel fuel ratio variation characteristics at constant engine speed and load. Improvement of the economical parameters of the engine and reduction of carbon dioxide concentration in exhaust gases is detected under operation with hydrogen gas fuel. Significant reduction of the exhaust gases opacity is observed. It is not clear what the impact of the quantity of hydrogen, injected in the engine, on the concentration of nitrogen oxides in the exhaust gases is

A study of hydrogen fuel impact on compression ignition engine performance

In this paper, a dual-fuel compression ignition engine test bench is presented. In hydrogen-diesel fuel co-combustion conditions, the engine parameters are determined – performance: effective torque, effective power and mean effective pressure; fuel economy: fuel consumption and specific fuel consumption; toxicity: carbon monoxide, carbon dioxide, nitrogen oxides, hydrocarbons, and smoke emissions (opacity). The impact of hydrogen-diesel fuel mass ratio on the performance, toxicity and economy of the engine is studied by obtaining a series of hydrogen-diesel fuel ratio variation characteristics at constant engine speed and load. Improvement of the economical parameters of the engine and reduction of carbon dioxide concentration in exhaust gases is detected under operation with hydrogen gas fuel. Significant reduction of the exhaust gases opacity is observed. It is not clear what the impact of the quantity of hydrogen, injected in the engine, on the concentration of nitrogen oxides in the exhaust gases is