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No 2 (2018)
5-11 327
Abstract
The dependence of the accuracy of the object's coordinates estimation on the relative position of transmitting and receiving points of the multi-position radar system was studied. A way to increase of the accuracy of the object's coordinates estimation for small elevation angles by placement of the one receiving positions on the aerial vehicle was proposed.
12-17 287
Abstract
Increasing the effectiveness of vibration-based diagnosis is carried out by developing new approaches to assess the technical condition of equipment. The effectiveness of the use of a scalogram as a tool for condition monitoring of equipment is estimated in the article.
18-25 341
Abstract
Using estimated-compensation method the selection it's motivated the algorithm simulation of interference evaluating the time of arrival and complex amplitude of the output signal consistent with the true signal of the filter, the weight subtracting the copy of the true signal from the input implementation, the formation of sufficient statistics for the two alternatives are «slow» and «fast» differences false signal from the true and comparing them with the threshold. Analytically and by means of simulation the study of the effectiveness of the proposed algorithm is realized. It's shown that the correct selection of simulation interference with a probability of at least 0.8 is provided by the model how it differs from the true signal when the ratio signal/noise 30 dB or more.
26-32 308
Abstract
Based on the method of linearization, a technique for calculating of a single estimation errors of the observable terrestrial objects location from the data of the onboard optical-location system is presented. The assumptions and limitations under which the proposed technique acceptable in real time operation are defined.
33-39 1309
Abstract
Considering the synthesis of the quasi-optimal two-channel discriminator structure of the angle meter of the fast fluctuating signal source for using a linear scanning of the antenna pattern. It is shown that the discriminator can be constructed by using two single-channel classical discriminators.
40-46 366
Abstract
General methods for solving the problem of image reconstruction are analyzed. Based on it results, the main drawbacks of the recovery methods are highlighted, the methods for further investigation are chosen.
47-53 3266
Abstract
The features of the design and the operation principle of frequency doublers in range 120-220 GHz are considered. The results of input and output power measurements of frequency doublers are given, the values of them efficiency factors are calculated. A technique for measuring and estimating the results of the deviation of the efficiency is developed. The dependence of the transmission coefficients from the value of the output power of the frequency doublers is investigated.
54-58 279
Abstract
The investigations results of the temperature dependences of the multiplication coefficients of the dark current and photocurrent for silicon photoelectric multipliers are presented. It is shown to what extent the decrease in temperature effects to the change in the photocurrent gain and leads to a decrease of the series resistance of the microplasma breakdown. Keywords: silicon photoelectric multipliers, photocurrent gain, microplasma breakdown.
59-63 351
Abstract
Modern mobile phones are multifunctional devices that provide users various services and alternative communication channels for the transmission of information by installing applications on them. Utilization of such applications causes to increasing of the energy consumption of mobile phones and, as a result, to the reduction of their battery life. An approach to increasing of the mobile phones functioning duration due to the adaptive control of the applications used on them is suggested in the article.
64-71 310
Abstract
The possibility of application of the speckle-optical method for the objectivization of cutaneous blood flow and evaluation of vascular reactivity with respiratory arrest and hyperventilation is shown. 21 patients with arterial aneurysms (AA) of the brain were examined. Recording of blood flow was carried out on skin of the temporal region on both sides. Violation of vascular reactivity during respiratory tests in the form of development of paradoxical reactions or reduction of adequate responses to HF and HB on the side with AA has been established. The most informative are the power of the spectrum and the mean frequency of the spectrum.
72-76 287
Abstract
High degree of intensification of monohydrides decomposition process with use of catalysts is shown. It is established that the completeness decomposition of monohydrides in the presenceof platinoreniyevy spinel increases for 35-55 %.
77-84 433
Abstract
The problem of finding the shortest paths on weighted graphs is considered. The variants of statement of the problem, known algorithms for it solving, areas of practical application and existing challenges, in particular, the challenge of scalability, are analyzed. The class of block-parallel algorithms, their advantages and disadvantages is investigated. A fast block-parallel threaded algorithm oriented to large-sized graphs is proposed. It differs by changing the order of block calculations, reducing the critical path and operating time on a multi-core system, decreasing the data exchanges among local caches of cores and between neighbor levels of hierarchical memory.
85-91 357
Abstract
Convolutional network approach is utilized for training an end-to-end model that would let a car drive itself around the track in a driving simulator by predicting steering angles based on the simulated camera data.
92-97 3397
Abstract
The algorithm of the imitation simulation of the automated four-press line of details' stamping is developed. The computer experiment is executed. Characteristics of the line depending on the size of details' party are received. Recommendations how to improve the efficiency of production and workers' safety are given.
98-105 281
Abstract
The performance of binary signaling on generalized fading channels with maximal ratio combining (MRC) and imperfect channel estimates is studied. It is assumed that estimates of the communication channel parameters are distorted by interference, which is a complex Gaussian random variable. An expression for the average probability of error is provided in the form of a simple single integral which involves the moment generating function of the normalized signal-to-noise ratio corresponding to the case of ideal MRC. Various examples demonstrate the usefulness of the derived expression under various fading conditions with different distributions and with a possible correlation between the diversity branches.
102-106 291
Abstract
The structure forming method and dynamic configuration of combined system of automatic control of water level in drum of steam generators of nuclear power stations with water-water power reactor on the basis of the transfer functions of optimal controllers using the principles of the theory of invariance is given. Comparison of direct quality indicators of three automatic control systems (standard and three-shots, digital system with the state observer and proposed combined automatic control system) is realized. The simulation results of transients, when change of steam flow rate is 10 % and power unit load changes plannedly, have confirmed advantages of the proposed combined system.
113-115 248
Abstract
Ensembles of free standing particles of titanium, zinc, copper and iron oxides of 6-109 nm in size were sol-gel synthesized with a use of a cellulose paper as a template. The calcination time as short as 60 min at 550 °C in air was found to be sufficient for the formation of crystalline single phase TiO2 or ZnO nanoparticles, Cu2O+CuO or Fe2O3+Fe3O4 nanocomposites and to burn out the organic components. The impurities initially present in the cellulose (Сa, Na, Cl) were detected in the synthesized compounds. The original version of the paper was stolen by James Franklin and on-line published with the cut list of the authors in Journal of Nanomedicine and Nanotechnology 2017 without author permission.


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ISSN 1729-7648 (Print)
ISSN 2708-0382 (Online)