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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(biāo)簽：
Fundamental
Limits
Secure
Class
on
of
上傳時間：
2020-01-04
上傳用戶：kddlas
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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(biāo)簽：
Communications
Future
Mobile
LTE
上傳時間：
2020-05-27
上傳用戶：shancjb
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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(biāo)簽：
RestoringConnections_IBM_CPL
上傳時間：
2020-06-01
上傳用戶：shancjb
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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.
標(biāo)簽：
Communication
Networks
上傳時間：
2020-06-07
上傳用戶：shancjb
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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(biāo)簽：
Engineering
Electrical
Current
Power
State
上傳時間：
2020-06-07
上傳用戶：shancjb
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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(biāo)簽：
Intelligent
Renewable
Systems
Energy
上傳時間：
2020-06-07
上傳用戶：shancjb
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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(biāo)簽：
Multiscale
Simulation
Approach
上傳時間：
2020-06-07
上傳用戶：shancjb
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STM32L053C8T6數(shù)據(jù)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(biāo)簽：
stm32l053c8t6
上傳時間：
2022-02-06
上傳用戶：
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為了確保最佳性能，請仔細(xì)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(jī)安裝在陰涼，干燥，清潔的地方-遠(yuǎn)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(jī)。為避免起火或電擊，請勿使本機(jī)遭受雨淋或浸水。絕對不要機(jī)柜。如果有東西掉入設(shè)備中，請與經(jīng)銷商聯(lián)系。不要在開關(guān)，控件或連接線上用力。移動設(shè)備時，請先拔下電源插頭和與其他設(shè)備相連的電線。切勿自己拉電線。機(jī)柜上的開口可確保設(shè)備正常通風(fēng)。如果這些開口被阻塞，則機(jī)柜內(nèi)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(cè)20厘米，深30厘米9通風(fēng)條件確保設(shè)備的頂部面板至少留出一定空間。否則不僅會損壞設(shè)備，還會引起火災(zāi)。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.
標(biāo)簽：
雅馬哈
RX-V692
功放
上傳時間：
2022-04-02
上傳用戶：
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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(biāo)簽：
hdmi
上傳時間：
2022-04-22
上傳用戶：
