Transmission Problem Research Articles

Wire and Cable Quality Traceability System Based on Industrial Internet of Things and Blockchain

Wire and cable are important industrial products involving the national economy and people’s livelihood, which are hailed as the “blood vessel” and “nerve” of the national economy, providing the basic guarantee for the normal operation of modern economy and society. The data traceability of their production and circulation process is a key factor in ensuring their quality and safety management. We aim to solve the problems of unsafe data transmission, weak quality control, and information islands in the process of wire and cable quality traceability in order to improve the production management efficiency of wire and cable manufacturing enterprises and to reduce the cost of consumer quality traceability of wire and cable products. We analyzed the technical characteristics and advantages of Industrial Internet of Things (IIoT) identity resolution and the blockchain. Key technologies are introduced, a traceability method that integrates the two is proposed, and a quality traceability framework based on the IIoT identity resolution system and blockchain technology is constructed. By analyzing the quality information composition of the wire and cable supply chain, a new quality traceability model based on the wire and cable supply chain is established. Finally, through the verification of the developed quality traceability system, the quality traceability function and quality information of each production link of wire and cable are successfully realized. This paper fills a gap in the field of cable product quality traceability using the combination of IIoT and blockchain technology. According to this model, it also has some potential for the traceability of other industrial products.

A nonlinear damped transmission problem as limit of wave equations with concentrating nonlinear terms away from the boundary

In this paper we study an initial and boundary value problem for damped wave equations with nonlinear singular terms concentrating away from the boundary of the domain, on an interior neighbourhood of a hyper-surface M that collapses to M as ɛ goes to zero. We describe the conditions for well posedness of both the approximating and limit problems, as well as the convergence, at the singular limit, of the solutions of the former to solutions of the latter, when the parameter ɛ goes to zero.

A novel low-latency scheduling approach of TSN for multi-link rate networking

Time Sensitive Networks (TSN), as an important representative of deterministic networks, provide low-latency and highly reliable communication services for the growing network applications that have strict requirements. Cyclic Queuing and Forwarding (CQF) is a well-known mechanism proposed by IEEE 802.1Qch for low-latency flow control of time-sensitive networks. It achieves bounded end-to-end delay and jitter transmission through a set of queues without complicated queue gating. However, most of the current work overlooks the widespread existence of multi-link rate networks in LANs and WANs, and the single-cycle CQF is unable to adjust different link rates, resulting in low bandwidth utilization and high latency. In this paper, we propose a novel scheduling approach named Multi-Cycle CQF (MCCQF) to solve the transmission problem in multi-link rate networks, aiming to reduce deterministic end-to-end delay and improve link bandwidth utilization. In addition, we formulate the scheduling constraints, being of guiding significance for designing the transmission of multi-link-rate networks, and we design an online scheduling algorithm based on it. We compare the proposed scheme with the single-cycle CQF online scheduling algorithm in hierarchical multi-link-rate networking scenarios, and the evaluation shows that our algorithm achieves better end-to-end ultra-low latency (38.9% reduction) with a smaller schedulability gap compared with single-cycle CQF. And we also improved the schedulability based on MCCQF by utilizing internal offset.

Enha need SB-SPS scheme to mitigate half duplex problem for C-V2X relay transmission in vehicle platooning

Enha need SB-SPS scheme to mitigate half duplex problem for C-V2X relay transmission in vehicle platooning

Цифровой радиоприёмник на основе нейронной сети

One of the areas of digital signal processing used in radio receivers and currently being investigated is the use of artificial neural networks. Signal reception is one of the most difficult theoretical and engineering problems in message transmission. The difficulty lies in the fact that messages need to be extracted from modulated signals, which are exposed to various distorting factors and interference in the radio channel. Therefore, it is desirable to have methods of reception that would be the best (optimal) in the given conditions. There are many different neural network topologies. Single–layer and multi-layer direct propagation are known – perceptrons, recurrent networks, self-organizing networks, as well as hybrid networks (radial-basis, hierarchical classifiers). Each of these types of topologies has its own advantages and disadvantages.The article analyzes current research and development in this area. The implementation of a radio receiver (demodulator) based on a multilayer perceptron is shown and the neural network is trained. Using National Instruments PXI equipment, a study was carried out, which showed that in comparison with an optimal receiver, the probability of a bit error in a receiver based on a neural network is higher, but insignificant. The operation of the receiver under the influence of harmonic interference showed that as the power of the interference increases, the probability of a BER error increases, and the closer the interference is to the carrier frequency, the higher the BER also becomes. Nevertheless, the neural network-based digital receiver under study remains operational at significant levels of interference that are close enough to the carrier frequency of the desired signal.

The Total Transfer Capability Assessment of Transmission Interfaces Combining Causal Inference and Multi-Task Learning

Power system security assessment has many tasks for different evaluation topics or objects, such as the Total Transfer Capability (TTC) assessment of different transmission interfaces. Some different tasks are related with each other, which is an important characteristic to improve the assessment performance if used properly but easily to be neglected. In this study, a novel architecture of the Causality-based Multi-Task Neural Network (CMTNN) is proposed, which can take the causal relevance between tasks into account while avoiding the introduction of too much extraneous information. First, the mask layer is applied after the input layer to filter irrelevant information task-specifically. Then, the causal analysis based on the Peter-Clark algorithm is performed to find those causally-related tasks. Finally, the causality-based information-sharing mechanism between related tasks is designed in the neural network to share deep information, so as to improve the model assessment performance on those tasks. In this paper, the proposed method is applied on the total transfer capability assessment problem of multiple transmission interfaces, and the case study on a real-world regional system with more than 8,000 nodes in China validates its effectiveness.

On a 2D transmission problem with singularity at the interface modeling autoignition of reactive jets

On a 2D transmission problem with singularity at the interface modeling autoignition of reactive jets

Stabilization of a wave-wave transmission problem with generalized acoustic boundary conditions

Stabilization of a wave-wave transmission problem with generalized acoustic boundary conditions

Well-posedness for a transmission problem connecting first and second-order operators

We establish the existence and uniqueness of viscosity solutions within a domain Ω ⊆ ℝn for a class of equations governed by elliptic and eikonal type equations in disjoint regions. Our primary motivation stems from the Hamilton-Jacobi equation that arises in the context of a stochastic optimal control problem.

Interior transmission problems with coefficients of low regularity

Interior transmission problems with coefficients of low regularity

Signature of Einstein-Cartan theory

We study the effects of torsion as predicted by the Einstein-Cartan theory in the test-particle non-relativist approximation. We derive the corresponding 2-spinor Hamiltonian. Then, we solve an idealized reflection and transmission problem for a beam travelling across a spin-polarized target. We identify deviations in the spin polarizations on the reflected and transmitted beams that can distinguish Einstein-Cartan from general relativity. These deviations would constitute compelling evidence for a non-trivial spacetime torsion if measured.

Classification of cyber threats for internet of things

Smart home consists of various Internet of things (IoT) devices. These IoT devices are designed to help and simplify people’s lives. The technical progress of the IoT field is aimed at simplifying human life, thereby creating new cyber threats. Different scientific papers are mentioned that number of IoT devices is growing constantly by 15% per year. As a result, around 1.6 billion IoT devices will be used globally over the internet. It means that IoT devices will be accessed over internet by consumers. Nowadays, Internet is accessible easily by everyone, so they can afford freely the ecosystem of IoT devices at home. Within this development of IoT ecosystem, consumers can face serious problems of transmission and storage of information by IoT devices. These problems might be data theft from IoT devices, using such IoT devices for Denial of Service (DoS) attacks, user tracking and so on. Local cyber threats provide an opportunity for an attacker to gain access to a home network and take advantages of it. Global cyber threats are dangerous because IoT devices can be controlled remotely from anywhere in the world without the knowledge of the user. One of the risks is that the user’s home network of IoT devices could be controlled by botnets to carry out cyber-attacks. The article describes and analyzes current threats to IoT smart home devices and provides examples of data collected and processed by smart devices. Collecting information about users through IoT devices is a novelty of this work.

On the Fredholm Property and Solvability of a System of Integral Equations in the Transmission Problem for the Helmholtz Equation

A scalar three-dimensional boundary value problem of wave diffraction for the Helmholtz equation with transmission conditions that assume the presence of an infinitely thin material at the media interface is considered. Uniqueness and existence theorems for solutions are proved. The original problem is reduced to a system of integral equations over the media interface. Calculation formulas for the system of linear algebraic equations obtained after applying the collocation method and numerical results for solving the problem when the domain is a ball with certain transmission conditions are given.

Training on Clean Water Treatment Using Slow Sand Filters And Biomass Filters at Bahrul Magfiroh Islamic Boarding School Malang City

The purpose of this activity is to increase students' knowledge about PHBS and diarrhea prevention using herbal ingredients as well as the application of clean water treatment simulations using slow sand filter and biomass filter methods. This method of implementing service uses a participatory and collaborative approach through active and interactive discussions. This activity was carried out by involving 54 students of Bahrul Magfiroh Islamic Boarding School Malang. Service participants directly practice and understand the function of applying water treatment devices and the use of herbal ingredients for the prevention of diarrhea. The results of activities on clean water treatment are almost 90% understood by students, both the use of biomass filters and slow sand filters, while 42.6% of students still have a low understanding of how to process herbal ingredients for the prevention of diarrhea. The importance of continuous training on increasing knowledge of clean and healthy living behavior must continue to be improved as an effort to prevent the risk of disease transmission and health problems, including maintaining personal health and the Islamic boarding school environment.

Approximation of Dirichlet-to-Neumann operator for a planar thin layer and stabilization in the framework of couple stress elasticity with voids

In this paper, we start from a two dimensional transmission model problem in the framework of couple stress elasticity with voids which is defined in a fixed domain Ω − juxtaposed with a planar thin layer Ω + δ . We first derive a first approximation of Dirichlet-to-Neumann operator for the thin layer Ω + δ by using the techniques of asymptotic expansion with scaling, which allows us to approximate the transmission problem by a boundary value problem doesn’t take into account any more the thin layer Ω + δ , called approximate impedance problem; after that, we prove an error estimate between the solution of the transmission problem and the solution of the approximate impedance problem.

On the distribution of Born transmission eigenvalues in the complex plane

We analyze an approximate interior transmission eigenvalue problem in R d for d = 2 or d = 3, motivated by the transmission problem of a transformation optics-based cloaking scheme and obtained by replacing the refractive index with its first order approximation, which is an unbounded function. Using the radial symmetry we show the existence of (infinitely many) complex transmission eigenvalues and prove their discreteness. Moreover, it is shown that there exists a horizontal strip in the complex plane around the real axis, that does not contain any transmission eigenvalues.

Beyond presentism: Memory studies, deep history and the challenges of transmission

We take up the challenge to extend the ‘archive of mnemonic practices’ beyond recent histories of violence by facilitating a dialogue between scholarship on deep history and the fourth wave of memory studies, both emerging under the sign of the Anthropocene. In so doing, we engage with the problem of transmission as it has emerged in both fields. Works in cultural memory studies provide us with compelling ways of thinking through mediated practices of transmission, but they are limited by their focus on the recent past and on encultured technologies of memory that primarily reflect the European origins of the field. Studies of deep history, which engage transmission among Indigenous communities, by contrast, tend to rely on an account of transmission as precise replication, oftentimes over hundreds of generations. To reconsider and theorize mediated practices of transmission, we draw on the concept of the deep present as formulated within ethnomusicology. This term describes a present in which Aboriginal culture-work and performance both transmits memory of the deep past and evokes that deep past itself, activating it today. We consider two public installations as examples of remembrance of the deep past in urban Warrane/Sydney – bara by Judy Watson and Virtual Warrane by Brett Leavy – each of which is of Country in a way that connects memory over time and activates a deep present. We argue that these instances of memory in the deep present might offer ways of reconsidering the possibilities of a decolonizing future.

Development of Computer Vision, Image Processing, and Analysis at the Digital Optics Laboratory of the Institute for Information Transmission Problems of the Russian Academy of Sciences

Development of Computer Vision, Image Processing, and Analysis at the Digital Optics Laboratory of the Institute for Information Transmission Problems of the Russian Academy of Sciences

Image Analysis and Processing Theory, Methods, and Algorithms. Review of Research at the Iconics Laboratory of the Institute for Information Transmission Problems of the Russian Academy of Sciences (Kharkevich Institute)

Image Analysis and Processing Theory, Methods, and Algorithms. Review of Research at the Iconics Laboratory of the Institute for Information Transmission Problems of the Russian Academy of Sciences (Kharkevich Institute)

ANALISIS KONSEP HOSPITAL WITHOUT WALLS PADA PELAYANAN KELAINAN REFRAKSI DI UPTD RUMAH SAKIT MATA PROVINSI SULAWESI UTARA

A hospital without walls or known as a hospital without walls is very useful for patients who come to the hospital for treatment with referrals from the public health center as the entry point for referral diagnosis, this is to minimize the risk of infection transmission and other disease problems. The purpose of this study is to analyze the concept of a hospital without walls and the obstacles and challenges in providing refractive errors. The research was conducted at the UPTD Eye Hospital in North Sulawesi Province, from January to December 2022 using in-depth interviews with five research informants, namely the director, head of medical services, ophthalmologist, family doctor and patient. Instruments in the form of in-depth interview guidelines and a list of questions that have been provided. The stages of data processing are narrating, inferring, reducing, recording, sampling, unitizing. Data analysis is content analysis. The validity of the research results using triangulation of data sources and methods. The results of this study were obtained from the summary of the answers of the research informants that the concept of a hospital without walls all understand and know this concept to mitigate the accumulation of services in hospitals, but this concept has not been implemented because there are several factors such as standard operating procedures, human resources and infrastructure which is not yet possible for some FKTPs to be able to complete services at the community health center or family doctor, the obstacle presented by the informant is that there are still many patients who want to carry out direct services to the hospital without going to the health center or family doctor, another obstacle is the lack of tools for examining refractive errors and competence general practitioners to be able to make referrals in the diagnosis of disease. Hospital income will also increase if implementing this concept, if there is collaboration with related stakeholders such as BPJS Health, the Health Service, and other private parties, so that this will also have a good impact on the quality of service when hospital accreditation is carried out. The sophistication of information technology needs to be implemented as much as possible from the hospital so that it is easier so that patients do not pile up during services by registering online. The conclusion of this study is that the concept of a hospital without walls has not been implemented in the Eye Hospital of North Sulawesi Province because it has not followed standard operating procedures, quality competent resources and adequate infrastructure. FKTP Puskesmas in providing refractive error services have not provided complete supporting tools and the skills of FKTP doctors are still lacking, this will have an impact on assessing hospital accreditation in the quality of health services.
 Keywords: hospitals without walls, eye refractive error, family doctors