Abstract—In the future communication applications, users may obtain their messages that have different importance levels distributively from several available SOURCES, such as distributed storage or even devices belonging to other users. This scenario is the best modeled by the multilevel diversity coding systems (MDCS). To achieve perfect (information-theoretic) secrecy against wiretap channels, this paper investigates the fundamental limits on the secure rate region of the asymmetric MDCS (AMDCS), which include the symmetric case as a special case. Threshold perfect secrecy is added to the AMDCS model. The eavesdropper may have access to any one but not more than one subset of the channels but know nothing about the SOURCES, as long as the size of the subset is not above the security level. The question of whether superposition (source separation) coding is optimal for such an AMDCS with threshold perfect secrecy is answered. A class of secure AMDCS (S-AMDCS) with an arbitrary number of encoders is solved, and it is shown that linear codes are optimal for this class of instances. However, in contrast with the secure symmetric MDCS, superposition is shown to be not optimal for S-AMDCS in general. In addition, necessary conditions on the existence of a secrecy key are determined as a design guideline.
標簽： Fundamental Limits Secure Class on of
上傳時間： 2020-01-04
上傳用戶：kddlas
Providing QoS while optimizing the LTE network in a cost efficient manner is very challenging. Thus, radio scheduling is one of the most important functions in mobile broadband networks. The design of a mobile network radio scheduler holds several objectives that need to be satisfied, for example: the scheduler needs to maximize the radio performance by efficiently distributing the limited radio re- SOURCES, since the operator’s revenue depends on it.
標簽： Communications Future Mobile LTE
上傳時間： 2020-05-27
上傳用戶：shancjb
Commoditization is a serious threat to the telecommunications industry. Most CSPs offer similar services at rates designed to win what has become a price war. As a result, many face decreasing margins and difficulty sustaining differentiation based on prices or products alone. On top of commoditization, CSPs also face competition from OTT providers and an increasingly knowledgeable and demanding customer base. With access to growing amounts of data from an ever-increasing number of SOURCES and devices, today’s empowered, savvy consumers know what they want and expect to get it.
標簽： RestoringConnections_IBM_CPL
上傳時間： 2020-06-01
上傳用戶：shancjb
n its Framework and Roadmap for Smart Grid Interoperability Standards, the US National Institute of Standards and Technology declares that a twenty-first-century clean energy economy demands a twenty-first-century electric grid. 1 The start of the twenty-first century marked the acceleration of the Smart Grid evolution. The goals of this evolution are broad, including the promotion of widespread and distributed deployment of renewable energy SOURCES, increased energy efficiency, peak power reduction, automated demand response, improved reliability, lower energy delivery costs, and consumer participation in energy management.
上傳時間： 2020-06-07
上傳用戶：shancjb
The author of this textbook intends to consider all stages of the life cycle of the energy reSOURCES: extraction of mineral energy reSOURCES and mastering for power engineering renewable energy, transportation of mineral energy raw materials to the place of consumption, the conversion of primary energy SOURCES into electrical and/or thermal energy, transportation and distribution among the customers, and energy storage (if necessary).
標簽： Engineering Electrical Current Power State
上傳時間： 2020-06-07
上傳用戶：shancjb
The use of renewable energy systems, such as wind power, hydropower, tidal power, solar power, geothermal power and biomass burn is growing. Research in electric power generation from renewable SOURCES is continuously expanding and stands for an area of high technological and financial importance. The implemen- tation of new technologies for the functioning and management of renewable energy systems will help to further develop the renewable energy sector.
標簽： Intelligent Renewable Systems Energy
上傳時間： 2020-06-07
上傳用戶：shancjb
Battery systems for energy storage are among the most relevant technologies of the 21 st century. They – in particular modern lithium-ion batteries (LIB) – are enablers for the market success of electric vehicles (EV) as well as for stationary energy storage solutions for balancing fluctuations in electricity grids resulting from the integrationofrenewableenergySOURCESwithvolatilesupply 1 .BothEVandstationary storage solutions are important because they foster the transition from the usage of fossil energy carriers towards cleaner renewable energy SOURCES. Furthermore, EV cause less local air pollution and noise emissions compared to conventional combustion engine vehicles resulting in better air quality especially in urban areas. Unfortunately, to this day, various technological and economic challenges impede a broad application of batteries for EV as well as for large scale energy storage and load leveling in electricity grids.
標簽： Multiscale Simulation Approach
上傳時間： 2020-06-07
上傳用戶：shancjb
STM32L053C8T6數據手冊Features ? Ultra-low-power platform – 1.65 V to 3.6 V power supply – -40 to 125 °C temperature range – 0.27 μA Standby mode (2 wakeup pins) – 0.4 μA Stop mode (16 wakeup lines) – 0.8 μA Stop mode + RTC + 8 KB RAM retention – 139 μA/MHz Run mode at 32 MHz – 3.5 μs wakeup time (from RAM) – 5 μs wakeup time (from Flash) ? Core: ARM? 32-bit Cortex?-M0+ with MPU – From 32 kHz up to 32 MHz max. – 0.95 DMIPS/MHz ? Reset and supply management – Ultra-safe, low-power BOR (brownout reset) with 5 selectable thresholds – Ultralow power POR/PDR – Programmable voltage detector (PVD) ? Clock SOURCES – 1 to 25 MHz crystal oscillator – 32 kHz oscillator for RTC with calibration – High speed internal 16 MHz factory-trimmed RC (+/- 1%) – Internal low-power 37 kHz RC – Internal multispeed low-power 65 kHz to 4.2 MHz RC – PLL for CPU clock ? Pre-programmed bootloader – USART, SPI supported ? Development support – Serial wire debug supported ? Up to 51 fast I/Os (45 I/Os 5V tolerant) ? Memories – Up to 64 KB Flash with ECC – 8KB RAM – 2 KB of data EEPROM with ECC – 20-byte backup register
標簽： stm32l053c8t6
上傳時間： 2022-02-06
上傳用戶：
為了確保最佳性能，請仔細閱讀本手冊。請將其保存在安全的地方，以備將來參考。將本機安裝在陰涼，干燥，清潔的地方-遠離窗戶的熱源，過多的振動灰塵，濕氣和冷源。避免嗡嗡聲的變壓器，電動機。為避免起火或電擊，請勿使本機遭受雨淋或浸水。絕對不要機柜。如果有東西掉入設備中，請與經銷商聯系。不要在開關，控件或連接線上用力。移動設備時，請先拔下電源插頭和與其他設備相連的電線。切勿自己拉電線。機柜上的開口可確保設備正常通風。如果這些開口被阻塞，則機柜內部的溫度將迅速升高。因此，請避免將物品放在這些開口處，并將其安裝在后方10厘米，兩側20厘米，深30厘米9通風條件確保設備的頂部面板至少留出一定空間。否則不僅會損壞設備，還會引起火災。To assure the finest performance, please read this manual carefully. Keep it in a safe place for future reference Install this unit in a cool, dry, clean place -away from windows heat SOURCES, SOURCES of excessive vibration dust, moisture and cold. Avoid SOURCES of humming transformers, motors). To prevent fire or electrical shock do not expose the unit to rain or water.
上傳時間： 2022-04-02
上傳用戶：
HDMI-Definition Multimedia Interface Specification Version 2.0This document constitutes the Version 2.0 specification for the High-Definition Multimedia Interface (HDMI Specification Version 2.0). This Specification incorporates HDMI Specification Version 1.4b by reference and defines additional and improved functionality. Mechanical, behavioral, and protocol requirements necessary for compliance are described for SOURCES, Sinks, Repeaters, and Cables.
標簽： hdmi
上傳時間： 2022-04-22
上傳用戶：
