scholarly journals Research on the Remote Deployment Design of OTN Electrical Racks

2020 ◽  
pp. 117-129
Author(s):  
Tianpu Yang ◽  
Junshi Gao ◽  
Haitao Wang ◽  
Guangchong Dai ◽  
Rui Zhai
Keyword(s):  
Power Supply ◽  
Rapid Development ◽  
Simulation Models ◽  
Air Conditioner ◽  
Multimedia Services ◽  
Transmission Bandwidth ◽  
Exponential Increase ◽  
Optical Layer

AbstractThe rapid development of 4G and multimedia services drives the exponential increase of the demand for transmission bandwidth. The OTN technology therefore emerges. In recent years, the number of OTN devices in backbone and core equipment rooms has increased sharply. However, due to factors such as equipment room planning, air conditioner, and power supply, new electrical racks cannot be installed in the same equipment room as original optical racks during OTN expansion of 80-wavelength systems. The remote deployment of OTN electrical racks has certain impact on OTN system indicators, OM/OD, and OTU optical-layer parameters. This document analyzes the factors that are affected by the remote deployment of OTN electrical racks, creates simulation models based on scenarios, and provides suggestions on the remote deployment design of OTN electrical racks.

scholarly journals Smart Grid Nontechnical Loss Detection Based on Power Gateway Consortium Blockchain

2021 ◽  
Vol 2021 ◽  
pp. 1-20
Author(s):  
Xudong He ◽  
Jian Wang ◽  
Jiqiang Liu ◽  
Enze Yuan ◽  
Kailun Wang ◽  
...  
Keyword(s):  
Smart Grid ◽  
Power Supply ◽  
Rapid Development ◽  
Good Effect ◽  
Smart Meter ◽  
Human Beings ◽  
Labor Costs ◽  
Time Consumption ◽  
Decentralized Management ◽  
Supply Capacity

The rapid development of the smart grid brings convenience to human beings. It enables users to know the real-time power supply capacity, the power quality, and the electricity price fluctuation of the grid. However, there are still some threats in the smart grid, which increase all kinds of expenses in the grid and cause great trouble to energy distribution. Among them, the man-made nontechnical loss (NTL) problem is particularly prominent. Recently, there are also some NTL detection programs. However, most of the schemes need huge amounts of supporting data and high labor costs. As a result, the NTL problem has not been well solved. In order to better avoid these risks, problems such as tampering of smart meter energy data, bypassing the smart meter directly connected to the grid, and imbalance between revenue and expenditure of the smart grid are tackled, and the threat scene of NTL is constructed. A hierarchical grid gateway blockchain is proposed and designed, and a new decentralized management MDMS system is constructed. The intelligent contract combined with the elliptic curve encryption technology is used to detect the storage and the acquisition of power data, and the detection of NTL problems is realized. At the same time, it has a certain ability to resist attacks such as replay, monitoring, and tampering. We tested the time consumption and throughput of this method on Hyperledger Fabric. At the same time, eight indexes of other methods proposed in the literature are compared. This method has a good effect.

scholarly journals Significant factors affecting the selection of rational options for power supply in an off-grid zone

2019 ◽  
Vol 77 ◽  
pp. 02006
Author(s):  
Ivanova Irina
Keyword(s):  
Power Supply ◽  
Methodological Approach ◽  
Simulation Models ◽  
Economic Indicators ◽  
Factors Affecting ◽  
Fuel Delivery ◽  
Generating Equipment ◽  
Selection Of ◽  
Significant Factors

The paper presents a short characteristic of an off-grid zone in the eastern regions of the Russian Federation. The main problems of power supply to consumers in this zone are described, and possible options for solving them are provided. A methodological approach and model tools to estimate the efficiency of alternative options of power supply to off-grid consumers are described. The factors affecting the selection of a rational option of power supply in the off-grid zone are classified. We show the interconnection between the main significant factors (availability of grid infrastructure, local fuel resources, complexity of fuel delivery logistics, characteristics of accessible power-generating equipment, and environmental constraints) and their impact on economic indicators of alternative options. Based on the systematized results of long-term studies, we present a scheme designed to select a rational option of power supply to a particular off-grid consumer according to characteristics of the described factors. Keywords: Off-grid consumers, alternative options, impact of factors, economic indicators, methodological approach, simulation models, economic efficiency.

scholarly journals Coverless Steganography Based on Motion Analysis of Video

2021 ◽  
Vol 2021 ◽  
pp. 1-16
Author(s):  
Yun Tan ◽  
Jiaohua Qin ◽  
Xuyu Xiang ◽  
Chunhu Zhang ◽  
Zhangdong Wang
Keyword(s):  
Motion Analysis ◽  
Rapid Development ◽  
Speckle Noise ◽  
Jpeg 2000 ◽  
Multimedia Services ◽  
Whole Process ◽  
Good Improvement ◽  
Lower Transmission ◽  
Good Trade ◽  
Coverless Information Hiding

With the rapid development of interactive multimedia services and camera sensor networks, the number of network videos is exploding, which has formed a natural carrier library for steganography. In this study, a coverless steganography scheme based on motion analysis of video is proposed. For every video in the database, the robust histograms of oriented optical flow (RHOOF) are obtained, and the index database is constructed. The hidden information bits are mapped to the hash sequences of RHOOF, and the corresponding indexes are sent by the sender. At the receiver, through calculating hash sequences of RHOOF from the cover video, the secret information can be extracted successfully. During the whole process, the cover video remains original without any modification and has a strong ability to resist steganalysis. The capacity is investigated and shows good improvement. The robustness performance is prominent against most attacks such as pepper and salt noise, speckle noise, MPEG-4 compression, and motion JPEG 2000 compression. Compared with the existing coverless information hiding schemes based on images, the proposed method not only obtains a good trade-off between hiding information capacity and robustness but also can achieve higher hiding success rate and lower transmission data load, which shows good practicability and feasibility.

Paper 4: A Feasibility Study on Powered Lower-Limb Prostheses

1968 ◽  
Vol 183 (10) ◽  
pp. 18-25 ◽  
Author(s):  
D. C. Witt
Keyword(s):  
Mathematical Model ◽  
Feasibility Study ◽  
Power Supply ◽  
Lower Limb ◽  
Rapid Development ◽  
Analogue Simulation ◽  
Uneven Terrain ◽  
Control Scheme ◽  
Suitable Power ◽  
Lower Limb Prostheses

The paper investigates the feasibility of externally powered lower-limb prostheses, in particular those in which walking motions would be automatically controlled. The lack of a suitable power supply is a major obstacle to the rapid development of a practical prosthesis, but a theoretical and practical study is being made of a ‘prototype walking device’, out of which, if successful, a prosthesis might evolve. The configuration of this device is outlined, with reasons for the choice, and possible actuators and sensors are discussed. A mathematical model is formulated and a control scheme is outlined which should enable the device to walk stably on small feet over uneven terrain. Results of analogue simulation of the device are summarized.

Rapid prototyping, customizable multifunctional structure: 3D printing technology promotes the rapid development of TENG

2021 ◽  
Author(s):  
Nixin Cai ◽  
Ping Sun ◽  
Saihua Jiang
Keyword(s):  
3D Printing ◽  
Power Systems ◽  
Rapid Prototyping ◽  
Energy Conversion ◽  
Power Supply ◽  
Rapid Development ◽  
Portable Device ◽  
Printing Technology ◽  
3D Printing Technology ◽  
Conversion Technology

The development of IoTs and portable device have excited the relentless pursuit of self-power systems to solve the limitations of conventional power supply methods. As a novel energy conversion technology,...

Wolfram Mathematica Functional Possibilities for Curved Lines and Surfaces Visualization

2021 ◽  
pp. 28-37
Author(s):  
S. Ignat'ev ◽  
A. Folomkin ◽  
E. Muratbakeev
Keyword(s):  
Rapid Development ◽  
Educational Institution ◽  
Simulation Models ◽  
High Educational Institution ◽  
Educational Process ◽  
Descriptive Geometry ◽  
Functional Capabilities ◽  
Wolfram Mathematica ◽  
Pedagogical Design ◽  
Depth Study

The paper states that the current conditions in which the education system is located, and the rapid development of IT require constant improvement of methodological materials, taking into account the full capacity of the current software. Examples of programs necessary for preparation of methodological materials for high-quality classes are given. The purpose of the paper was to identify the Wolfram Mathematica didactic potential when conducting classes in the disciplines of the geometric and graphic profile at a technical high educational institution. In this paper has been performed analysis of literature sources both domestic and foreign ones on the Wolfram Mathematica system application in science and teaching of various disciplines. It has been shown that the program use scope is very wide, in fact, it is comprehensive and requires additional and in-depth study. Examples of Wolfram Mathematica using in mathematics, physics, chemistry, geometry, robotics, virology, and the humanities are given. In the paper have been provided examples for pedagogical design of simulation models for an electronic course on descriptive geometry in the Moodle system. An example of code written in the Wolfram Mathematica is provided. Interactive models developed during the design are presented, which allow the user to change the constructed curves and surfaces’ parameters. Have been defined some functional capabilities of the system, and has been revealed the Wolfram Mathematica didactic potential for teaching geometric and graphic disciplines. Have been considered other authors’ similar models, which can be used in the educational process to increase the clarity of the material presented in the classroom. In conclusion it is pointed out that interactive visualization in the "Descriptive Geometry" discipline, together with classical working practices, significantly enriches the content of geometric education.

scholarly journals The Oceanographic Multipurpose Software Environment

2016 ◽  
Author(s):  
Inti Pelupessy ◽  
Ben van Werkhoven ◽  
Arjen van Elteren ◽  
Jan Viebahn ◽  
Adam Candy ◽  
...  
Keyword(s):  
Numerical Experiments ◽  
High Performance ◽  
Rapid Development ◽  
Circulation Model ◽  
Simulation Models ◽  
Ocean Model ◽  
Propagation Model ◽  
Global Ocean ◽  
Global Circulation Model ◽  
Software Environment

Abstract. In this paper we present the Oceanographic Multipurpose Software Environment (OMUSE). This framework aims to provide a homogeneous environment for existing or newly developed numerical ocean simulation codes, simplifying their use and deployment. In this way, OMUSE facilitates the design of numerical experiments that combine ocean models representing different physics or spanning different ranges of physical scales. Rapid development of simulation models is made possible through the creation of simple high-level scripts, with the low-level core part of the abstraction designed to deploy these simulations efficiently on heterogeneous high performance computing resources. Cross-verification of simulation models with different codes and numerical methods is facilitated by the unified interface that OMUSE provides. Reproducibility in numerical experiments is fostered by allowing complex numerical experiments to be expressed in portable scripts that conform to a common OMUSE interface. Here, we present the design of OMUSE as well as the modules and model components currently included, which range from a simple conceptual quasi-geostrophic solver, to the global circulation model POP. We discuss the types of the couplings that can be implemented using OMUSE and present example applications, that demonstrate the efficient and relatively straightforward model initialisation and coupling within OMUSE. These also include the concurrent use of data analysis tools on a running model. We also give examples of multi-scale and multi-physics simulations by embedding a regional ocean model into a global ocean model, and in coupling a surface wave propagation model with a coastal circulation model.

Vehicle Performance Simulation of Electric Bus with Composite Power Supply Based on Secondary Development of Advisor

2012 ◽  
Vol 588-589 ◽  
pp. 368-373
Author(s):  
Dong Jie Pei ◽  
Dong Chen Qin ◽  
Xing Wang ◽  
Jiu Shi Liu
Keyword(s):  
Power Supply ◽  
Fuzzy Theory ◽  
Storage System ◽  
Simulation Models ◽  
Basic Structure ◽  
Energy Storage System ◽  
Vehicle Performance ◽  
Assembly Simulation ◽  
Electric Bus ◽  
Composite Energy

In order to improve the performance of the electric buses，composite power system is designed，which is analyzed and verified by the simulation using the software of Advisor. Advisor is secondary developed by updating assembly simulation models and vehicle models. The basic structure of composite energy storage system and the control strategy based on fuzzy theory are designed, and the simulation of vehicle performance is done under the road cycle of UDDS, and then compares with the bus with only batteries. The result shows that ultra-capacitor has a prominent "clipped peak and filled channel" protection for the battery, recovers energy commendably, and extends the battery’s life. The electric bus with composite power supply can meet the requirement of vehicle performance, and its indexes of all aspects are better than the electric bus with only batteries.

The Wind and Light Power Supply System Controller in the Mobile Base Stations

2014 ◽  
Vol 989-994 ◽  
pp. 2778-2781
Author(s):  
Hong Ma
Keyword(s):  
Power Supply ◽  
Power Supply System ◽  
Rapid Development ◽  
Base Station ◽  
Supply System ◽  
Base Stations ◽  
Maintenance Cost ◽  
Light Power ◽  
System Controller ◽  
Mobile Base

With the rapid development of economy, the consumption of energy increasing year by year, the conventional energy is facing increasingly draining.The wind and light power supply system controller in the mobile base stations is a kind of power supply management system,used the wind and light, which have the biggest and the most development potential renewable energy and new energy technology at present.That especially suitable for mobile communication base station,and remote sensing, remote control base station power supply and operation environment. The controller can reduce run maintenance cost, improving the quality of communication and system management level,and the efficiency of the whole.

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