Speed Of Information Transmission Research Articles

Research on simulation of school uniform supply chain optimal model based on internet of things

In this paper, the information sharing platform based on the Internet of things is constructed to improve the efficiency of supply chain, and the flow chart based on the Internet of things of the school uniform is analyzed, integrated application of Internet of things technology in supply chain to analyze the detail of the system. By calculating Lyapunov Index, power spectrum, and correlation dimension, the bifurcation and chaos characteristics of supply chain under different production strategies are analyzed. At the same time, the periodicity and initial value sensitivity of chaos are used to explain the feasibility of manufacturer organizing flexible production and the causes of bullwhip effect in supply chain and corresponding prevention measures. And the experiment results show that bullwhip effect will occur in the chaotic supply chain system, which can be suppressed by short-term forecasting and accelerating the speed of demand information transmission. Chaos also has a favorable side for enterprises, such as making low-cost flexible production possible.

Analysis on the Art Skills of Editing Radio and TV News in the Era of Financial Media

<p>Under the background of the new era, network technology, information technology and new media technology have been applied to various fields, effectively promoting social progress and industry development. In particular, the application of big data, cloud computing and multimedia technology in the radio and television industry not only accelerates the speed of information transmission and increases the number of information dissemination, but also truly realizes information sharing and promotes the sustainable development of the radio and television industry. Under the background of the new era, the information collection and processing technology and editing technology in the radio and television news industry have been improved, which also puts forward new requirements for the editing skills of radio and television news. Based on the author's own news practice, through analyzing the editing skills of radio and television news in the new era, the author puts forward some thoughts and countermeasures to provide useful reference for more radio and television news from the north.</p>

Research on Communication Strategy based on Mobile Information Technology

Under the background of the enhancement of modern information technology, the dissemination of information tends to be diversified. The further development of mobile Internet and its communication technology has changed the way and speed of information transmission. With the advent of 5G era, smart phones, smart terminals and other devices play an important role as media due to their convenience and become the main channel for people to obtain information. The purpose of this paper is to study the emerging mobile intelligent terminals in the background of the information age and examine these new products of The Times and the propagation rules and methods behind them from the perspective of media. Based on the questionnaire survey on the usage habits of users of these intelligent terminals, this paper makes a bold prediction on the mode of communication in the information age. The research results of this paper show that in the information age of media convergence, various communication subjects are faced with the challenge of adapting to the requirements of The Times and changing the mechanism. Only by actively innovating and improving the communication mechanism from the perspective of the audience can the relevant subjects better meet the requirements of the information Age.

Metrological Support for Measurements of Speed and Bandwidth of Packet Data Networks: Problems and Prospects for Development

We consider the main problems of metrological support for measurements of speed and bandwidth in digital packet data networks. We enumerate the methods for performing data rate measurements. We propose various ways of providing traceability of digital data rate meters such as upgrades to the existing standard GET 200-2012, development of a primary reference method for measuring speed, and the creation of a local verification procedure for measuring the transmission speed of digital information. Recommendations are given for the implementation of the selected method for ensuring traceability of meters for data transfer rate and bandwidth of communication channels. Suggested approaches can apply in metrology for digital communication systems.

THE INCREASE OF THE ENERGY EFFICIENCY OF THE RADIO EQUIPMENT BASED ON THE USE OF MODULATION BY ORTHOGONAL HARMONIC CARRIERS

Most of the theoretical results, as well as methods using OFDM modulation, are obtained in order to increase the rate of information transmission with energy constraints and the bandwidth. For broadband radio access systems, this task is primarily due to the commercial purpose of these systems and the desire of the communications developers to provide high-speed wireless access to the Internet as much as possible at the same time. This article is devoted to the issue of increasing the energy efficiency of radio equipment using modulation orthogonal harmonic carriers under conditions of intentional interference and frequency-selective fading while ensuring a given level of reliability and speed of information transmission.

МАТЕМАТИЧНА МОДЕЛЬ ФОРМУВАННЯ СИГНАЛІВ З АДАПТАЦІЄЮ ПО ШВИДКОСТІ ПЕРЕДАВАННЯ ІНФОРМАЦІЇ НА ОСНОВІ ДОСКОНАЛИХ ДВІЙКОВИХ МАТРИЦЬ

Предметом дослідження є методи та моделі формування сигналів адаптивних видів модуляції. Мета: забезпечення високої пропускної здатності та спектральної ефективності, для даних умов розповсюдження радіохвиль, шляхом використання запропонованої моделі формування сигналів з адаптацією по швидкості передавання інформації на основі досконалих двійкових матриць. Результати досліджень. В роботі представлено результати аналізу напрямів розвитку та основних властивостей безпроводових мереж передачі даних. Встановлено, що лише у разі забезпечення комплексу розглянутих властивостей, безпроводова мережа може виконувати своє функціональне призначення – забезпечувати доставляння повідомлень у необхідному обсязі й із заданою якістю. Розглянуто принципи реалізації методів адаптивної модуляції в перспективних засобах бездротового зв’язку. Використання адаптивної модуляції дозволяє забезпечити найкращу пропускну здатність для даних умов розповсюдження радіохвиль, розглянута в роботі схема адаптивної модуляції дозволить звести ймовірність виникнення помилки в передачі до мінімуму. Запропоновано математичну модель формування сигналів з адаптацією по швидкості передавання інформації на основі досконалих двійкових матриць. Розглянуто основні принципи функціонування пристрою управління моделі формування сигналів з адаптацією по швидкості передавання інформації на основі досконалих двійкових матриць. Висновки та область застосування результатів досліджень. Запропонована математична модель формування сигналів з адаптацією по швидкості передавання інформації на основі досконалих двійкових матриць. Використання запропонованих сигналів з адаптацією по швидкості передавання інформації на основі досконалих двійкових матриць дозволить забезпечити високу пропускну здатність та спектральну ефективність, для даних умов розповсюдження радіохвиль, перспективних радіоінтерфейсів

The Impact of Social Media on Risk Communication of Disasters-A Comparative Study Based on Sina Weibo Blogs Related to Tianjin Explosion and Typhoon Pigeon.

Social media has brought opportunities and challenges to risk communication of disasters by undermining the monopoly of traditional news media. This paper took blogs about Tianjin Explosion and Typhoon Pigeon posted through Sina Weibo as empirical objects. Moreover, the paper used the analytical method of social network to conduct a comparative study on the network structures of information disseminated among different types of disasters, with the goal of uncovering the impact of social media on different types of risk communication of disasters. The result shows a different impact of the risk communication on the two types of disasters. While the role of social media for the risk communication of natural disasters is mainly to influence information dissemination, the roles of social media for the risk communication of man-made disasters are to transmit information as well as to communicate emotions. The differences seen within the structure of social media networks are causes differences in functions. Specifically, the structure for the social media communication network on man-made disasters takes on a “core - periphery structure” which is endowed with both information communication and emotional communication functions. Also, the role of the opinion leaders for the subnet is found to be significant while the communication within small groups is kept pretty active; additionally, the slow speed of information transmission of the network could result in easily distorted information. On top of that, the network is characterized with intense vulnerability to the attacks on core nodes. In contrast, the social media network for natural disaster risk communication is not seen with an obvious “peripheral-core” structure which is a relatively pure information transmission network with relatively equal principal status. In other words, the entire network is found with stronger connectivity and relatively faster information transmission speed. Furthermore, the nodes inside the network are found to have weaker control over information transmission. In sum, the research results are helpful in improving the risk communication theory based on social relations, optimizing the communication structure of disaster information so as to change the effect of risk communication.

Carrier Frequency Offset Effects on OFDM System over Rayleigh Fading Channel

Orthogonal Frequency Division Multiplexing (OFDM) system showed the use of Discrete Fourier Transform (DFT) and Inverse Discrete Fourier Transform (IDFT) to perform the baseband modulation and demodulation. So that, it can increase and improve the efficiency of the modulation and demodulation. Currently, the OFDM is being utilized in the field of broadband wireless communication, which transmit signals orthogonally, that increases speed of information transmission. It also has high proficiency with high bandwidth and provide large data rates and robust against the multipath delay spread. On the other hand, there are some issues faced OFDM system which are high Peak Average Power Ratio (PAPR), and sensitive to Phase Noise (PN) and Carrier Frequency Offset (CFO). This paper presents Orthogonal Frequency Division Multiplexing (OFDM) performance evaluation in the presence of CFO with two different environment scenarios were used: an AWGN channel and a Rayleigh fading channel. The simulation was performed to evaluate the effects of CFO based on Bit Error Rate (BER) vs. Energy Bit per Noise Ratio (Eb/No). The results showed that for BER degradation caused by CFO effects have presented in our simulation for both AWGN and Rayleigh fading channel.

A Novel Collaborative Optimization Framework for Web Video Event Mining Based on the Combination of Inaccurate Visual Similarity Detection Information and Sparse Textual Information

The high speed and low latency of 5G mobile network have accelerated the speed and amount of information transmission. Web video is likely to become the main mode of news production and dissemination in the future for its richer information and more convenient dissemination, which will subvert the traditional mode of event mining. Therefore, event mining based on web videos has become a new research hotspot. However, web videos are vulnerable to video editing, lighting, shooting perspective and shooting angle, and other factors, resulting in the inaccurate visual similarity detection problem. Generally speaking, effectively integrating humungous volumes of cross-model information would give a great help. However, web videos are described with few terms, and thus sparse text information becomes a challenge for cross-model information combination. To address this issue, this paper proposes a new collaborative optimization framework with the combination of inaccurate visual similarity detection information and sparse textual information. This framework is composed of three steps. After obtaining the statistics of the distribution characteristics of each word in all Near-Duplicate Keyframes (NDKs), the high-level semantic cross-correlation between NDKs is first mined with the help of textual features, forming a new set of semantic relevant NDKs with different visual expressions. Next, textual distribution features are enriched through finding more semantically related words by the new NDK set with various forms of visual expressions, solving the sparse distribution problem for each word in all NDKs. Finally, Multiple Correspondence Analysis (MCA) is used to mine the events. Experimental results with a large number of real data demonstrate that the proposed model outperforms the existing methods for web video event mining.

Розробка математичних моделей оцінювання ефективної швидкості передачі інформації у просторі приміщень для безпровідних каналів стандарту 802.11

The main structural unit of 802.11 standard networks is the wireless channel. Its characteristics are affected by a large number of destabilizing factors. The most reliable way to assess such factors is through experimental studies and the creation of empirical models based on them. The use of such models makes it possible to predict the efficiency of channels at the design stages and when connecting to networks for fixed and mobile subscribers. The paper proposes new empirical models for assessing the effective data speed based on the measurement of the signal input parameter of the receiver input for any 802.11 standard wireless channels. The peculiarity of the models is the use of spatial distribution of the signal for different types of rooms with geometric dimensions up to 40×20 m. This takes into account the most common cases of construction of wireless networks: angular and central location of the access point. The models obtained take into account signal fluctuations and the maximum possible number of destabilizing factors. The study of the obtained models showed the correspondence of the highs and lows of the fluctuations of the spatial distribution of the signal power to the fluctuations of the effective data speed. It is established that for the 5 GHz frequency band there is a greater decrease in the characteristics of the effective speed of information transmission from a distance, as well as its greater value relative to the 2,4 GHz band. This confirms the sufficiently high load of the 2,4 GHz band by interference and noise interference. The presence of destabilizing factors in the channel and the dependence of the signal level on the location of the subscriber device in space relative to the access point, is taken into account by measuring the signal power at the input of the receiver. The reliability of the assessment of the spatial models depends on the linear regression coefficients and the signal attenuation coefficients, which are determined experimentally. This can be attributed to the disadvantages of the models, assumes that the assessment error occurs when the geometry and the number of objects of the room change. It is possible to minimize this disadvantage by creating a database of studies of various destabilizing factors with the introduction of correction coefficients.

Topology Identification in Two-Layer Complex Dynamical Networks

This study focuses on topology identification in two-layer networks with peer-to-peer unidirectional couplings, where one layer (the response layer) receives information from the other layer (the drive layer). The goal is to construct a theoretical framework for identifying the topology of the response layer based on the dynamics observed in both layers. In particular, an auxiliary layer is constructed. Based on the LaSalle-type invariance principle, simple control inputs and updating laws are designed to enable nodes in the auxiliary layer to reach complete synchronization with their counterparts in the response layer. Simultaneously, the topology of the response layer is adaptively identified. Numerical simulations are conducted to illustrate the effectiveness of the method. The impact of the inter-layer information transmission speed on the identification performance is further investigated. It is revealed that neither too slow or too fast information transmission favors efficient identification, and there exists an optimal level of transmission speed. The duplex framework can model many real-world systems, such as communication-rumor spreading networks. Therefore, the method proposed in this study can spark attention and provide basic insights into further theoretical research and practical application of multilayer networks, including detecting spreading routes and locating sources of rumors or pseudo news.

Proposal of Global Strain Clocking Scheme for Majority Logic Gate

A stairs-type global strain clocking mechanism for nanomagnetic majority logic gate based on shape engineering of nanomagnets was designed in this paper. Reasonable size nanomagnets and proper strain clocking scheme ensure the computing architecture pipelined at room temperature. The optimal global strain clocking scheme was obtained by investigating the impact of magnetic layer thickness and width on clocking period and strain magnitude. Encouragingly, for the global strain clocking, information transmission speed of majority logic gate is increased 1-2 times as against the local strain clocking scheme due to decreasing the number of start-ups during information transmission. While the energy dissipated per clock cycle of the global strain clocking scheme consumes 3-4 times less energy than that of local strain clocking scheme. Moreover, global clocking is used to control a nanomagnetic logic device(NMLD), in which case single device consisted of many nanomagnets can be treated as single nanomagnet. However, magnetization switching is error-prone in the presence of thermal noise at room temperature. Therefore, the proper structure parameters of the device are obtained at room temperature, in which case the error probability of the majority logic gate is 0.5% in theoretical simulation. These results provide essential guidance for the design of energy-efficient multiferroic nanomagnetic logic devices.

CODE-BASED HYBRID CRYPTOSYSTEM: COMPARATIVE STUDIES AND ANALYSIS OF EFFICIENCY

In this paper the basic principles of construction and operation of McEliece and Niederreiter cryptosystems based on the use of error-correcting codes were considered. A new hybrid cryptosystem that combines the rules of encryption according to the above-mentioned schemes is proposed. Also, this paper presents the analysis and comparative studies from the standpoint of stability, the volume of public and private keys, length of ciphertext and relative speed of information transmission of the new proposed scheme and McEliece and Niederreiter cryptosystems. It is considered from an analytical point of view and with the help of graphic images. Comparative studies revealed that the hybrid cryptosystem retains the positive aspects of its predecessors, as well as allows us to increase the relative transmission rate with the preservation of the stability indicator to the classical and quantum cryptanalysis. One disadvantage is the increase in decoding time by adding information extracted as in Niederreiter scheme, but the increase in this indicator is not critical. Despite the demonstrated benefits, it remains open to all cryptosystems to reduce the amount of the used key data, which, in the case of quantum computers to maintain stability, still needs to be increased once.

METHOD OF SIGNAL PARAMETERS ESTIMATION OF RADIOSTATIONS WITH FAST FREQUENCY HOPPING SPREAD SPECTRUM

Modern special-purpose radios utilize ultra-short burst mode with frequency hopping spread spectrum. Such digital radios operate, as a rule, in the fast frequency hopping spread spectrum mode and use a considerable number of frequency channels with frequency separation between adjacent channels, which is significantly less than the spectrum width of the frequency element. The main modulation in such radios is frequency manipulation. The identification of signals with fast frequency hopping spread spectrum and frequency manipulation is performed by estimating the speed of frequency tuning, the speed of information transmission, the number of frequency channels and the step of the frequency grid and comparing the obtained values with the corresponding characteristics of known radio stations with fast frequency hopping spread spectrum. The time limits and the duration of the frequency elements are calculated by the envelope of the received signal. For this purpose, a suitable method has been developed, which consists in filtering the envelope by means of a moving average window for suppression of the noise component and threshold processing. The threshold value is selected by the given probability of its exceeding by noise sample. The proposed approach to determining the time limits of frequency elements does not require any a priori signal information. To determine the frequencies of the frequency elements periodogram estimates are used. An exponential extrapolation of the discrete power spectrum was used to increase the frequency resolution at a fixed window length of the fast Fourier transform. It is shown that in order to uniquely determine the step of the frequency grid and the diversity of frequency manipulation frequencies, it is necessary to analyze the number of frequency elements not less than the number of frequency channels. By analyzing the histogram of the differences of sorted frequency vector of the frequency elements, determine the frequency grid, frequency diversity and the multiplicity of frequency manipulation. An approximate estimate of the number of frequency channels is calculated as the ratio of the magnitude of the frequency vector of the frequency elements to the step of the frequency grid. As a rule, symbol transmission at frequency manipulation is carried out at orthogonal frequencies, so it can be roughly assumed that the symbolic speed is equal to the frequency diversity of the frequency manipulation. The baud rate can be set only after signal demodulation and bit stream analysis, which can determine the frame structure and the number of service and information bits. The proposed method provides the estimation of the values of the parameters necessary for the identification of radio stations of signal parameters with a relative error not exceeding 0.3%, with values of signal to noise ratio not lower than 5 dB.

Method of space-frequency block coding with dual-mode index modulation aided OFDM

The technology of combining Multiple Input-Multiple Output (MIMO) and Orthogonal Frequency Division Multiplexing (OFDM) for modern Wireless Communication Systems is considered. The areas of priority use of time and frequency variants of Alamouti’s diversity scheme for Wireless Communication Channels with limited frequency and energy resources are determined. The concept of Index Modulation (IM) is analyzed. The method of OFDM subcarriers index modulation is determined as the most promising means of increasing noise immunity and speed of information transmission for real frequency-selective channels of Wireless Communication Systems. The benefits of Dual-Mode OFDM-IM with optimized signal constellations based on BPSK, QPSK and 16-QAM are demonstrated. A novel Signal-Code design combining the Dual-Mode Index Modulation Aided OFDM and the Orthogonal Space-Frequency Block Coding with Alamouti’s core SFBC-DM-OFDM-IM is proposed. Compared to classical SFBC-OFDM the proposed method allows simultaneously to improve spectral and energy efficiency of information transmission systems in frequency and time-varying wireless communication channel. The SFBC-DM-OFDM-IM method is advisable for providing high-quality communications with highly dynamic ground objects, unmanned aerial vehicles and other aircrafts in the conditions of Signal-to-Noise Ratio critical reduction, which takes place under the influence of electronic suppression means. The obtained scientific results can be effectively used for designing new generation Wireless Communication Networks with limited frequency and energy resources.

Synthesis of derivatives of complex signals based on nonlinear discrete sequences with improved correlation properties

The structure of modern information and communication systems (ICS) is characterized by considerable spatial diversity of a large number of interacting subscribers. In these conditions, technologies of processing, storage, protection, transmission and reception of information on the network under conditions of natural and artificial interferences (impacts), as well as limited frequency and energy resources of ICS play an extremely important role in ensuring the quality of service of end users. ICS, especially for critical applications, are increasingly demanding to ensure the effectiveness of their functioning (speed of information transmission, electromagnetic compatibility, noise immunity, information security, survivability, secrecy, information security). The ability to implement these requirements is largely disregarded by applicable information technology. There is a contradiction between the strict requirements for secrecy, confidentiality, integrity, authenticity of data stored and transmitted through communication lines, on the one hand, and existing models, methods and technologies for managing telecommunications networks, information security, services and quality of service, on the other hand. The main ways to resolve this contradiction is to increase the noise immunity, secrecy and information security of ICS based on the improvement of methodological bases for the construction of ICS by developing methods of information exchange, methods of synthesis of signals of physical data carriers with the necessary properties. The principles of construction of derivative signal systems are given. The requirements for output and source signals are defined. The justification of the possibility of using random (pseudorandom) processes for the production of signals is used to construct them. The results of studies of ensemble, correlation, and structural properties of the obtained systems of derivative signals are presented. It is shown that the use of this class of complex nonlinear discrete signals in modern ICS will improve such performance indicators of such systems as noise immunity, information and structural stealth.

SYNTHESIS OF INVENTORIES TO THE INTERFERENCE OF INFORMATION AND TELECOMMUNICATION SYSTEMS

The article deals with the development of analytical algorithms of information and telecommunication systems formation that are invariant to the obstacle (additiveornon-aditiveone). The basic approaches to determine the class of obstacles for which an invariant system can be constructed are discussed and analyzed in detail. It is established that the invariance property of a feedback system guarantees the given probability of receiving information, but it does not guarantee a preset speed of information transmission. Studies have shown that invariance is achieved by reducing the noise immunity of additive noise. In a second-order phase-difference modulation system, the error probability is invariant to the signal frequency, but it is greater than the error rate in the system with phase-difference modulation at a constant signal frequency. As a result of the conducted researches it is established that the maximum of the undetected error does not depend on the characteristics of the interference, but is determined solely by the parameters of the correction code. The ways of improving the qualitative characteristics of information and telecommunication systems to ensure their invariance to the obstacle have been determined by analytical means, which is confirmed by simulation results and experimental data

Особливості вживання стилістичних засобів різних рівнів в іншомовній публіцистиці

This article is devoted to the study of the basic stylisticcharacteristics of various texts in the foreign press, including the texts of theinterview genre, as well as various lexical means of representation theexpressiveness of such texts, taking into account phraseologisms and theirinnovations. The theoretical principles of study of journalistic texts in linguisticsare highlighted and their main stylistic characteristics are displayed. It isdetermined that press phraseologisms play the great expression-emotional role inthe foreign journalistic texts. It is possible to define that stylistic description ofphraseological units of the press is based on their expressive charge andexpressive properties. It is found out that the selection of stylistic means in modernjournalistic texts is also motivated by the features: standard and expression. Therequirement to influence the mass reader creates such a specific feature of modernjournalistic text as its expressive nature, and the requirement for the speed ofinformation transmission and its socially importance creates such a feature asneutrality or standard. Standardization is manifested in the selection of stylisticmeans of different levels: lexical, morphological, syntactic, figurative, graphic,61which are typical for the texts of this type. The expressiveness of the stylistic meansmakes it possible to convey the emotional, connotative, and evaluative aspect ofthe events and facts reflected in the press in order to increase the influence on themass reader.

Методика застосування сигналів удосконаленої модуляції циклічним зсувом коду з адаптацією по швидкості передавання інформації в перспективних радіоінтерфейсах

This paper presents the results of the analysis of the directions of development of special purpose radio communication systems. The method of application of signals of advanced modulation by cyclic shift of the code with adaptation on speed of information transmission in perspective radio interfaces is offered. The procedure of estimation of radio wave propagation medium and transmission and reception of control signals is considered; models of formation and correlation processing of signals of advanced modulation by cyclic shift of code with adaptation on the speed of information transmission. The technique of application of advanced modulation signals by cyclic code shift with adaptation on the speed of information transmission in perspective radio interfaces is offered. The use of the proposed method of application of signals of advanced modulation by cyclic shift of the code with adaptation on the speed of transmission of information in perspective radio interfaces will allow to provide high bandwidth and spectral efficiency, for these conditions of radio wave propagation.

Technological and Socio-communication Aspects of Establishment and Development of Mobile Services in Ukraine

The article explores technological and social prerequisites of functioning and developmen of mobile services, which become an integral part of modern society. It has been proved that the development of wireless data technologies and an increase in the speed of information transmission have led to the active use of mobile devices, which have been extensively distributed in recent years around the world.It has been found that improving of mobile communications and reducing the cost of using it is an important prerequisite for the expansion of mobile services. There is a trend towards increasing demand among users for high-speed Internet access. The level of penetration of the Internet in Ukraine and the number of active users of mobile Internet are highlighted.It is substantiated that the important prerequisite for the emergence of mobile services is the rapid and continuous improvement of mobile phones (smartphones) and their capabilities. The growing of smartphones popularity is actualizing and stimulating the development of mobile services, among which mobile applications are at the forefront. It is proved that the use of various applications extends forms of access to information resources, significantly affects the volume and speed of data transmission, what in turn, acts as one of the conditions for the functioning of mobile services.The essence and preconditions of digital competence formation in the context of development of global trend of digital transformation of society and activation of use of mobile services are revealed. The role of education in this process is identified. The necessity of constant development of digital competences, formation of digital culture and support of organization of training by state authorities as the main initiator and strategist of formation and realization of human capital are substantiated. The relevance of the inclusion of library institutions as possessing resource and image capital to the process of formation of digital culture is proved.