Integration of innovative technologies into crime investigation activity is the significant direction of its effectiveness increasing

The article is devoted to the issues of the scientific and technical support of investigative activity. It is emphasized that nowadays fighting cybercrime determines the necessity to develop and implement the scientific and technical means, techniques and methods, as well as apply them to the activity of law enforcement agencies for prevention and investigation of crimes in the field of information and telecommunication technologies. The focus is placed on the fact that the retrieval, recording and investigation of electronic (digital) information in the pretrial investigation and its further use as evidence remain among the pressing and, at the same time, unexplored issues. It was stated that digital forensics is an integral and necessary tool in fighting cybercrime which is used for the identification, preservation, recovery, analysis, and presentation of digital evidence. The conclusion was made that with the spread of cybercrime in the modern world one of the priority directions of scientific and technical support of investigative activity is introduction of the latest means, methods and technologies of electronic intelligence into the work with electronic evidence and also protection of the sources of electronic (digital) information

ANALYSIS OF MODERN METHODS AND MEANS OF ELECTRONIC INTELLIGENCE FOR SPECIAL PURPOSES FOR MONITORING THREATENING STATIONARY AND MOBILE OBJECTS

Electronic methods and means of reconnaissance are a set of methods and organizational structures for conducting intelligence activities using electronic equipment and radio-technical devices (systems). The development of modern element base and computing facilities allows us to miniaturize modern facilities, introducing into them previously inaccessible algorithms and methods for processing the information received. This allows real-time monitoring of potentially dangerous (threatening) stationary and mobile objects, promptly responding to emerging terrorist threats and other dangerous phenomena. On the paper briefly discusses the main modern methods and means of electronic intelligence for special purposes, used in practice.

A Literature Review of Foreign Studies on the Impact of CALL on Second Language Acquisition from 2015

With the rapid development of economy and technology, more and more fields are combined with electronic intelligence and artificial intelligence, and language teaching is no exception. As a research hot issue, computer-assisted language learning (CALL) has attracted more and more people's attention. Based on computer-aided technology, teachers can not only provide students with rich language input, but also improve classroom efficiency. However, there are still some problems in this technology. This paper reviews some empirical studies on the impact of computer-assisted language teaching from 2015 and reveals the relevant progress and shortcomings of foreign researches in terms of six aspects from the perspective of language teaching, in order to provide some enlightenment for future research.

FPGA based Identification of Frequency and Phase Modulated Signals by Time Domain Digital Techniques for ELINT Systems

In this paper, a decision tree algorithm based on time-domain digital technique is developed for the identification and classification of diverse radar intra-pulse modulated signals for the electronic intelligence system in real-time. This includes linear frequency modulation, non-linear frequency modulation, stepped frequency modulation and bi-phase modulation. The received signal is digitised and the instantaneous phase and high accuracy instantaneous frequency are estimated. The instantaneous amplitude is also estimated to get the start and stop of the pulse. Instantaneous parameters are estimated using a moving autocorrelation technique. The proposed algorithm is employed on the instantaneous frequency and the modulation is identified. The modulation type and modulation parameter are important for unique radar identification when similar radars are operating in a dense environment. Simulations are carried out at various SNR conditions and results are presented. The model for algorithm is developed using a system generator and implemented in FPGA. These results are compared when the proposed algorithm is used with the existing digital in-phase and quadrature-phase (DIQ) technique of instantaneous frequency and amplitude estimation.

Modulation Recognition of Radar Signals Based on Adaptive Singular Value Reconstruction and Deep Residual Learning

Automatically recognizing the modulation of radar signals is a necessary survival technique in electronic intelligence systems. In order to avoid the complex process of the feature extracting and realize the intelligent modulation recognition of various radar signals under low signal-to-noise ratios (SNRs), this paper proposes a method based on intrapulse signatures of radar signals using adaptive singular value reconstruction (ASVR) and deep residual learning. Firstly, the time-frequency spectrums of radar signals under low SNRs are improved after ASVR denoising processing. Secondly, a series of image processing techniques, including binarizing and morphologic filtering, are applied to suppress the background noise in the time-frequency distribution images (TFDIs). Thirdly, the training process of the residual network is achieved using TFDIs, and classification under various conditions is realized using the new-trained network. Simulation results show that, for eight kinds of modulation signals, the proposed approach still achieves an overall probability of successful recognition of 94.1% when the SNR is only −8 dB. Outstanding performance proves the superiority and robustness of the proposed method.

On the experiment validity of the continuous medium motion detection by the waveguide method

Electronic intelligence is an important element of electronic warfare, which «is not announced and never stops». The purpose of electronic reconnaissance is to detect the emitting radio-electronic means of a potential enemy, to determine its location and radiation parameters using passive (non-emitting equipment). Electronic warfare, even in peacetime, is a promising area of development. The use of passive methods allows work to be carried out covertly, without detection. The peculiarity of the proposed method is that a priori information about the objects that reflected the signal is not required. Determination of the coordinates of the emitter is carried out by determining the delay between the arrival of the direct signal and the set of reflections from the terrain. The use of detailed, for today, satellite maps of the terrain allow with some accuracy to determine the coordinates of reflecting objects on the ground. The coordinates of the receiving point can also be determined with high accuracy using global navigation systems. The data entered the computer and the recording of signals obtained as a result of observing the air allows us to determine the coordinates of the radio emission source. The algorithm proposed in the article allows reducing the number of receiving points to one and using a phase direction finder to determine the direction of signal arrival. Evaluation of the potential accuracy of the method showed the possibility of practical application, while better results can be obtained when improving the algorithm in terms of improving the algorithms for determining the times of arrival of signals, algorithms for their extraction and post-processing of experimental data.

IMPLEMENTATION OF SOFTWARE SELECTION OF RADIO ELECTRONIC INTELLIGENCE MEANS AT THE STAGE OF ASSESSMENT OF THE SITUATION

The article shows the implementation of the software for the selection of electronic intelligence at the stage of assessing the situation on the basis of theoretical studies conducted by the authors. It is indicated on the basis of which documents the assessment of the situation with the choice of electronic reconnaissance means is carried out, what stages this process consists of, what is needed for the selection of electronic reconnaissance means. The design of information flows of the program for the selection of electronic intelligence means at the stage of assessing the situation with the help of Data Flow Diagrams. The general block diagram of algorithm of work of the software of a choice of means of electronic reconnaissance at a stage of an assessment of a situation is constructed. On the basis of the conducted researches the database for storage of the list of means of electronic reconnaissance is developed. The prototype of the software for the selection of electronic intelligence means at the stage of situation assessment is implemented and examples of work on each of the main blocks are given in the form of screenshots, which were pre-designed in diagrams and block diagrams of algorithms. The advantages and disadvantages of the developed software for the selection of electronic reconnaissance means at the stage of situation assessment are determined. The further steps of research and improvement of the program of a choice of means of radio-electronic intelligence at a stage of an assessment of a situation are specified.

SUBSTANTIATION OF APPROPRIATE OPTIONS FOR APPLICATION OF METHODS OF OBSERVABILITY ATTENUATION OF UKRAINIAN ARMED FORCES’ MILITARY EQUIPMENT, PROTECTION OF PERSONNEL AND EQUIPMENT FROM TECHNICAL MEANS OF RADIOLOCATING AND OPTICAL-ELECTRONIC INTELLIGENCE

Development of technologies for creating materials, environments and coatings with specified electrophysical characteristics for practical implementation in production and widespread use of observability attenuation technologies of surface, air, space, abovewater objects, surface-based installations, troops for the needs of Armed Forces of Ukraine and other military formations, impacts of artificial sources of electromagnetic radiation on the human body today is especially relevant. Nowadays, "stealth technologies" include the following main areas: the theory of diffraction on bodies of complex shape, research and development of radio-absorbing materials, coating technology and, finally, radiophysical experiment, which is used for control in each of these areas. One of the most important tasks is to reduce the level of signals generated by the reflection of electromagnetic waves emitted by radars, since radars still remain the most "long-range" means of detecting targets and air defense systems aiming. To date, "stealth technology" begins with mathematical modeling of electromagnetic wave scattering on an object, the radar visibility of which should be reduced. This step is essential for a preliminary assessment of the possible result and allows optimizing the shape and electrophysical characteristics of the object. The world leading countries have developed absorbing materials that capable to provide electromagnetic compatibility of the electronic equipment, camouflaging and counteraction to radio technical intelligence, use in designs of the radio electronic equipment. The comparative analysis of the developings that are promising for usage as radio-absorbing materials and radio-absorbing covering is carried out in the work. In the future, it is planned to expand the shielding frequency range and the range of use of absorbing coatings to protect personnel and equipment from electromagnetic emission.