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Cache-Enabled in Cooperative Cognitive Radio Networks for Transmission Performance
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作者 Jiachen Yang Chaofan Ma +3 位作者 Jiabao Man Huifang Xu Gan Zheng Houbing Song 《清华大学学报自然科学版(英文版)》 EI CAS CSCD 2020年第1期1-11,共11页
The proliferation of mobile devices that support the acceleration of data services(especially smartphones)has resulted in a dramatic increase in mobile traffic. Mobile data also increased exponentially, already exceed... The proliferation of mobile devices that support the acceleration of data services(especially smartphones)has resulted in a dramatic increase in mobile traffic. Mobile data also increased exponentially, already exceeding the throughput of the backhaul. To improve spectrum utilization and increase mobile network traffic, in combination with content caching, we study the cooperation between primary and secondary networks via content caching. We consider that the secondary base station assists the primary user by pre-caching some popular primary contents.Thus, the secondary base station can obtain more licensed bandwidth to serve its own user. We mainly focus on the time delay from the backhaul link to the secondary base station. First, in terms of the content caching and the transmission strategies, we provide a cooperation scheme to maximize the secondary user’s effective data transmission rates under the constraint of the primary users target rate. Then, we investigate the impact of the caching allocation and prove that the formulated problem is a concave problem with regard to the caching capacity allocation for any given power allocation. Furthermore, we obtain the joint caching and power allocation by an effective bisection search algorithm. Finally, our results show that the content caching cooperation scheme can achieve significant performance gain for the primary and secondary systems over the traditional two-hop relay cooperation without caching. 展开更多
关键词 COOPERATIVE COGNITIVE radio network content CACHING power ALLOCATION
权力距离研究述评与展望 被引量:1
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作者 包艳 廖建桥 《管理评论》 CSSCI 北大核心 2019年第3期178-192,共15页
权力距离强调个体对组织中权力分配不平等的接受程度。随着经济全球化和我国市场经济的迅猛发展,这一研究主题的作用日益凸显,理论界对权力距离的研究也越来越多,但相关研究议题仍存在许多不足与争议,亟待学者们探讨解决。本文在文献回... 权力距离强调个体对组织中权力分配不平等的接受程度。随着经济全球化和我国市场经济的迅猛发展,这一研究主题的作用日益凸显,理论界对权力距离的研究也越来越多,但相关研究议题仍存在许多不足与争议,亟待学者们探讨解决。本文在文献回顾的基础上,对权力距离的概念内涵、测量维度、影响因素和影响结果进行了详细的梳理和评述,探讨了现有研究的作用机制和理论解释,并对未来研究进行了深入而具体的展望与讨论。 展开更多
关键词 权力 权力距离 权力距离导向 权力距离的一致性
Will Germany move into a situation with unsecured power supply?
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作者 Harald SCHWARZ 《能源前沿:英文版》 CSCD 2019年第3期551-570,共20页
Together with a huge number of other countries, Germany signed the Paris Agreements in 2015 to prevent global temperature increase above 2℃. Within this agreement, all countries defined their own national contributio... Together with a huge number of other countries, Germany signed the Paris Agreements in 2015 to prevent global temperature increase above 2℃. Within this agreement, all countries defined their own national contributions to CO2 reduction. Since that, it was visible that CO2 emissions in Germany decreased, but not so fast than proposed in this German nationally determined contribution to the Paris Agreement. Due to increasing traffic, CO2 emissions from this mobility sector increased and CO2 emission from German power generation is nearly constant for the past 20 years, even a renewable generation capacity of 112 GW was built up in 2017, which is much higher than the peak load of 84 GW in Germany. That is why the German National Government has implemented a commission (often called "The German Coal Commission") to propose a time line: how Germany can move out of coal-fired power stations. This "Coal Commission" started its work in the late spring of 2018 and handed over its final report with 336 pages to the government on January 26th, 2019. Within this report the following proposals were made:①Until 2022: Due to a former decision of the German Government, the actual remaining nuclear power generation capacity of about 10 GW has to be switched off in 2022. Besides, the "Coal Commission" proposed to switch off additionally in total 12.5 GW of both, hard coal and lignite-fired power plants, so that Germany should reduce its conventional generation capacity by 22.5 GW in 2022.②Until 2030: Another 13 GW of German hard coal or lignite-fired power plants should be switched off.③Until 2038:The final 17 GW of German hard coal or lignitefired power plants should be switched off until 2038 latest. Unfortunately the "Coal Commission" has not investigated the relevant technical parameter to ensure a secured electric power supply, based on German's own national resources. Because German Energy Revolution mainly is based on wind energy and photovoltaic, this paper will describe the negligible contribution of these sources 展开更多
关键词 CO2 reduction mobility sector RENEWABLE GENERATION coal COMMISSION secured POWER GENERATION capacity reliable POWER supply power-to-gas power-to-heat
权力的游戏:资本、技术及其他 预览
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作者 金兼斌 《人民论坛·学术前沿》 CSSCI 北大核心 2019年第14期6-16,共11页
在现代社会,资本权力和技术权力构成了和平时期影响我们日常生活的重要力量。资本权力和技术权力的重要来源,在于其所构筑的各种系统、平台、网络,这些平台和网络构成了当代民众日常生活的基本场域,并在不知不觉间对这些系统、平台和网... 在现代社会,资本权力和技术权力构成了和平时期影响我们日常生活的重要力量。资本权力和技术权力的重要来源,在于其所构筑的各种系统、平台、网络,这些平台和网络构成了当代民众日常生活的基本场域,并在不知不觉间对这些系统、平台和网络产生依赖。资本和技术的权力由此得到彰显。无论是为了追逐利益还是话语权,资本在其权力的扩张中,必然需要借助传播的力量来确保其道义合法性和舆论安全。在信息化和全球化时代,虽然资本和技术的力量早已超越主权国家范畴,形成了一种类似民族国家的超级共同体,但代表一国公权力的政治权力,常常成为资本和技术权力合法化和可持续发展所必须依附和仰仗的终极力量。事实上,现代国家治理和社会治理,已经显示出高度的政治、资本、技术、传媒权力既交相融合又有所竞合的景观。 展开更多
关键词 权力 资本权力 技术权力 消费社会 传播 政治权力 技治主义
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The Maintenance of Peace in Mozambique: From GPA to the First Multiparty Elections, 1992-1994 预览
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作者 Rufino Carlos Gujamo 《文化与宗教研究:英文版》 2019年第2期77-98,共22页
After sixteen years of civil war the Mozambican government led by the Mozambique Liberation Front (FRELIMO) and the Mozambican National Resistance (RENAMO) have signed the General Peace Agreement (GPA) in Rome, Italy,... After sixteen years of civil war the Mozambican government led by the Mozambique Liberation Front (FRELIMO) and the Mozambican National Resistance (RENAMO) have signed the General Peace Agreement (GPA) in Rome, Italy, on 4th October 1992. The agreement that ended the war resulted from a negotiation process initiated following the hurting stalemate situation between the two conflicting parties. In the context of the implementation of such agreement the country experienced, successfully, the first multiparty elections in 1994 with the participation of FRELIMO and RENAMO - former military enemies as well as other political parties without any case of war resumption. This article seeks to identify the determinants factors for peace maintenance in Mozambique from the General Peace Agreement (GPA) to the first multiparty elections. Besides the important support provided by the international community, this article argues that the implementation of power sharing arrangements established in the context of GPA, namely,(1) military power sharing,(2) administrative and territorial power sharing, and (3) power sharing within the electoral institutions played an important role for peace maintenance in Mozambique during the period mentioned above. 展开更多
关键词 PEACE maintenance POWER SHARING military POWER SHARING ADMINISTRATIVE and TERRITORIAL POWER SHARING POWER SHARING within the electoral institutions
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A PV powered shunt active power filter for power quality improvement
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作者 Ayoub Benzahia Rabhi Boualaga +3 位作者 Ammar Moussi Laeid Zellouma Memich Meriem Bouziane Chaima 《全球能源互联网:英文版》 2019年第2期143-149,共7页
This paper deals with power quality improvement using a three-phase active power filter(APF) connected to a PV power system. A direct power control(DPC) approach is proposed to eliminate harmonic current caused by any... This paper deals with power quality improvement using a three-phase active power filter(APF) connected to a PV power system. A direct power control(DPC) approach is proposed to eliminate harmonic current caused by any nonlinear loads and at the same time guarantees the delivery of a part of the load request from the same PV source. A boost converter is used for maximum power point(MPP) tracking purposes under various climate conditions through a fuzzy logic technique. The suggested study is tested under a MATLAB/Simulink environment. The obtained results depict the efficacy of the proposed procedures to meet the IEEE 519-1992 standard recommendation on harmonic levels. 展开更多
关键词 Active POWER Filter(APF) PHOTOVOLTAIC (PV) Direct POWER Control (DPC) MAXIMUM POWER Point TRACKING (MPPT)
Progress and prospects of innovative coal-fired power plants within the energy internet
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作者 Yongping Yang Chengzhou Li +1 位作者 Ningling Wang Zhiping Yang 《全球能源互联网:英文版》 2019年第2期160-179,共20页
The development of electrical engineering and electronic, communications, smart power grid, and ultra-high voltage transmission technologies have driven the energy system revolution to the next generation: the energy ... The development of electrical engineering and electronic, communications, smart power grid, and ultra-high voltage transmission technologies have driven the energy system revolution to the next generation: the energy internet. Progressive penetration of intermittent renewable energy sources into the energy system has led to unprecedented challenges to the currently wide use of coal-fired power generation technologies. Here, the applications and prospects of advanced coal-fired power generation technologies are analyzed. These technologies can be summarized into three categories:(1) large-scale and higher parameters coal-fired power generation technologies, including 620/650/700 oC ultra-supercritical thermal power and double reheat ultra-supercritical coal-fired power generation technologies;(2) system innovation and specific, highefficiency thermal cycles, which consist of renewable energy-aided coal-fired power generation technologies, a supercritical CO2 Brayton cycle for coal-fired power plants, large-scale air-cooling coal-fired power plant technologies, and innovative layouts for waste heat utilization and enhanced energy cascade utilization;(3) coal-fired power generation combined with poly-generation technologies, which are represented by integrated gasification combined cycle(IGCC) and integrated gasification fuel cell(IGFC) technologies. Concerning the existing coal-fired power units, which are responsible for peak shaving, possible strategies for enhancing flexibility and operational stability are discussed. Furthermore, future trends for coal-fired power plants coupled with cyber-physical system(CPS) technologies are introduced. The development of advanced, coal-fired power generation technologies demonstrates the progress of science and is suitable for the sustainable development of human society. 展开更多
关键词 En ergy In ternet Coal-fired POWER GEN eration FLEXIBILITY Cyber-physical system Smart POWER plant
基于双激励双拾取的无线电能传输系统 预览
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作者 贾晋 赖志达 戴欣 《电子科技大学学报》 EI CAS CSCD 北大核心 2019年第4期546-552,共7页
传统的无线电能传输系统(WPT)多由单个激励线圈与单个拾取线圈组成,由于系统的耦合机构多为松散的耦合形式,且受到功率器件容量的限制,因此难以获得较大的传输功率。为了提高WPT系统的传输功率,该文构建了双激励双拾取线圈的无线电能传... 传统的无线电能传输系统(WPT)多由单个激励线圈与单个拾取线圈组成,由于系统的耦合机构多为松散的耦合形式,且受到功率器件容量的限制,因此难以获得较大的传输功率。为了提高WPT系统的传输功率,该文构建了双激励双拾取线圈的无线电能传输系统,在原WPT系统的基础上,增加了一组激励线圈和一组拾取线圈,利用耦合理论和电路原理的相关知识对该系统进行分析。通过Matlab仿真及实验验证了该方案的可靠性和有效性,并在负载为5 时,双激励双拾取线圈的WPT系统相比较于WPT系统,其功率提升了3.1倍,效率提高了9%。 展开更多
关键词 双激励双拾取线圈 效率 大功率 输出控制无线电能传输
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旅游社区参与中的权力-空间关系 预览
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作者 杨继荣 朱海彬 《旅游论坛》 2019年第4期42-49,共8页
我国的旅游社区参与研究缺乏对于权力问题的深入理解,文章主要就权力在社区参与中的理解和分析两方面的问题进行初步探讨。首先借助吉登斯的二重性权力理论将我国旅游社区参与研究中的两种对立权力观进行了结构性的关联,然后基于权力与... 我国的旅游社区参与研究缺乏对于权力问题的深入理解,文章主要就权力在社区参与中的理解和分析两方面的问题进行初步探讨。首先借助吉登斯的二重性权力理论将我国旅游社区参与研究中的两种对立权力观进行了结构性的关联,然后基于权力与空间的本体性关联提出了考察旅游社区参与中权力关系的权力-空间分析框架,空间生产再生产的就是以资源和规则为核心的权力关系,可以通过对社会空间结构及生产过程的解析获得对相应权力关系的解读,基于此形成了权力—空间分析视角,此视角下社区空间、旅游空间、流动空间与多元空间等多种形式的社会空间的生产与再生产过程对于理解我国旅游社区参与中的权力关系并进一步推动社区参与实践具有重要意义。 展开更多
关键词 旅游社区参与 权力 空间 权力—空间
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An online maximum power point capturing technique for highefficiency power generation of solar photovoltaic systems 预览
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作者 Lijun ZHANG Samson Shenglong YU +2 位作者 Tyrone FERNANDO Herbert Ho-Ching IU Kit Po WONG 《现代电力系统与清洁能源学报(英文)》 CSCD 2019年第2期357-368,共12页
This paper proposes a novel high-efficiency generation technique for photovoltaic(PV) system,named maximum power point capturing(MPPC) technique. This is an aperiodic perturbation MPPC technique compared to the conven... This paper proposes a novel high-efficiency generation technique for photovoltaic(PV) system,named maximum power point capturing(MPPC) technique. This is an aperiodic perturbation MPPC technique compared to the conventional periodic perturbation maximum power point tracking technique. Firstly, under a closed-loop circuit and an open-loop circuit,the complete I-V curves and P-V curves are defined. Secondly, the proposed MPPC technique is based on the complete I-V curves and a practical model of solar PV systems.The proposed method realizes that maximum power point(MPP) is captured online, and its control strategy is designed to set a steady operating area around MPP. The duty cycle keeps constant when the operating point is within the steady operating area, i.e., aperiodic perturbation, and when the operating point is outside the steady operating area, MPPC is triggered to capture a new MPP with an updated steady operating area. Simulation results demonstrate that no oscillations exist in steady-state;dynamic performances are improved;and only two perturbations are required to capture the new MPP. Using the proposed MPPC method,low voltage ride through and high voltage ride through can be prevented. 展开更多
关键词 PHOTOVOLTAIC systems MAXIMUM POWER POINT tracking(MPPT) MAXIMUM POWER POINT capturing(MPPC) Complete I–V CURVES
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Capture Performance of A Multi-Freedom Wave Energy Converter with Different Power Take-off Systems 预览
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作者 HUANG Shu-ting SHI Hong-da DONG Xiao-chen 《中国海洋工程:英文版》 SCIE EI CSCD 2019年第3期288-296,共9页
Among the wave energy converters (WECs), oscillating buoy is a promising type for wave energy development in offshore area. Conventional single-freedom oscillating buoy WECs with linear power take-off (PTO) system are... Among the wave energy converters (WECs), oscillating buoy is a promising type for wave energy development in offshore area. Conventional single-freedom oscillating buoy WECs with linear power take-off (PTO) system are less efficient under off-resonance conditions and have a narrow power capture bandwidth. Thus, a multi-freedom WEC with a nonlinear PTO system is proposed. This study examines a multi-freedom WEC with 3 degrees of freedom: surge, heave and pitch. Three different PTO systems (velocity-square, snap through, and constant PTO systems) and a traditional linear PTO system are applied to the WEC. A time-domain model is established using linear potential theory and Cummins equation. The kinematic equation is numerically calculated with the fourth-order Runge–Kutta method. The optimal average output power of the PTO systems in all degrees of freedom are obtained and compared. Other parameters of snap through PTO are also discussed in detail. Results show that according to the power capture performance, the order of the PTO systems from the best to worst is snap through PTO, constant PTO, linear PTO and velocity-square PTO. The resonant frequency of the WEC can be adjusted to the incident wave frequency by choosing specific parameters of the snap through PTO. Adding more DOFs can make the WEC get a better power performance in more wave frequencies. Both the above two methods can raise the WEC’s power capture performance significantly. 展开更多
关键词 oscillating BUOY wave energy converter nonlinear POWER TAKE-OFF multi-freedom POWER CAPTURE
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Superconducting magnetic energy storage for stabilizing grid integrated with wind power generation systems 预览
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作者 Poulomi MUKHERJEE V.V.RAO 《现代电力系统与清洁能源学报(英文)》 CSCD 2019年第2期400-411,共12页
Due to the interconnection of various renewable energies and adaptive technologies, voltage quality and frequency stability of modern power systems are becoming erratic. Superconducting magnetic energy storage(SMES),f... Due to the interconnection of various renewable energies and adaptive technologies, voltage quality and frequency stability of modern power systems are becoming erratic. Superconducting magnetic energy storage(SMES),for its dynamic characteristic, is very efficient for rapid exchange of electrical power with grid during small and large disturbances to address those instabilities.In addition,SMES plays an important role in integrating renewable sources such as wind generators to power grid by controlling output power of wind plant and improving the stability of power system.Efficient application of SMES in various power system operations depends on the proper location in the power system, exact energy and power ratings and appropriate controllers. In this paper, an effort is given to explain SMES device and its controllability to mitigate the stability of power grid integrated with wind power generation systems. 展开更多
关键词 POWER FLUCTUATION POWER quality Low voltage RIDE through SUPERCONDUCTING magnetic ENERGY storage SUPERCONDUCTORS Wind ENERGY
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提高电力用户终端用电效率的措施 预览
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作者 杨东宁 谢潇睿 《现代工业经济和信息化》 2019年第9期51-52,共2页
探讨了电力用户终端用电基本概述,分析了电力用户终端用电存在的问题,研究了提高电力用户终端用电效率的措施。
关键词 电力 用户终端 用电效率
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The Effect of Infrared Light’s Power on the Infrared Spectra of Thin Films 预览
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作者 Giovanna Scarel Eric C. Stevens 《凝固态物理国际期刊(英文)》 2019年第1期1-21,共21页
There are numerous evidences that a relationship exists between the average power P of electromagnetic waves and the mechanical motion of the objects interacting with them. We investigate the effects of infrared (IR) ... There are numerous evidences that a relationship exists between the average power P of electromagnetic waves and the mechanical motion of the objects interacting with them. We investigate the effects of infrared (IR) light’s average power P on the transmission Fourier transform infrared (FTIR) spectra of thin cubic Yb2O3 and rhombohedral LaAlO3 films deposited on silicon via atomic layer deposition. We find that different values of P of the IR light displace the minima of the absorption bands. This effect is reproducible in different sets of experiments and in different spectrometers. To interpret the experimental findings, we use the law of conservation of energy. We find a correlation among the energy of the IR waves and the number, moment of inertia, and vibrational/rotational frequency of the bonds involved in the vibrational or rotational motion. The law of conservation of energy unveils that larger values of P of the IR light and lower wavenumbers of the resonances involve a larger number of crystal bonds. One practical application of our approach is that it suggests a way to improve the sensitivity of the FTIR spectra of thin crystalline films in the far IR region. 展开更多
关键词 INFRARED Power VIBRATIONAL SPECTROSCOPY ATOMIC Layer DEPOSITION
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Penetrating power characteristics of half-wavelength AC transmission in point-to-grid system 预览
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作者 Hanqing LIANG Yadong LIU +2 位作者 Lei WAN Gehao SHENG Xiuchen JIANG 《现代电力系统与清洁能源学报(英文)》 CSCD 2019年第1期123-130,共8页
With the proposed concept of global energy interconnection, half-wavelength alternating current transmission(HWACT) technology becomes of more interest.HWACT lines can be adopted to establish a pointto-grid system, in... With the proposed concept of global energy interconnection, half-wavelength alternating current transmission(HWACT) technology becomes of more interest.HWACT lines can be adopted to establish a pointto-grid system, in which the penetrating power(PP) is produced between receiving terminals, having a significant effect on the power flow distribution.In order to investigate this phenomenon, the PP characteristics of the HWACT system are researched in this paper.First, the mathematical relationship between the transmission power and terminal bus voltages of a single HWACT line is derived using the equations of a distributed parameter model.The research indicates that the relationship between power and terminal voltages shows ‘‘reverse characteristics'opposite to those of regular short transmission lines.Then, the concept and definition of PP in a point-to-grid system with two receiving terminals are proposed, and the corresponding relationship between PP and the terminal bus voltages is derived.Simulations are carried out to validate the theory under different conditions, so that the accuracy and adaptiveness of the theoretical analysis can be proved.In addition, the results demonstrate that selecting the location for a HWACT system has demanding requirements in order to control the value of PP. 展开更多
关键词 Half-wavelength ALTERNATING current transmission(HWACT) Ultra-high VOLTAGE SYNCHRONOUS POWER grids PENETRATING power(PP)
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铁路电力、电牵专业隐蔽工程施工质量控制研究 预览
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作者 夏炎 《铁路工程技术与经济》 2019年第3期19-22,26共5页
铁路电力、电牵专业隐蔽工程主要包括基础制作、电缆敷设、接地埋设、电杆基坑开挖、化学锚栓预埋等,其质量控制至关重要。当前铁路电力、电牵专业隐蔽工程存在原材料质量不合格、隐蔽工程质量难追溯、检验方法陈旧、验收把关不严等问... 铁路电力、电牵专业隐蔽工程主要包括基础制作、电缆敷设、接地埋设、电杆基坑开挖、化学锚栓预埋等,其质量控制至关重要。当前铁路电力、电牵专业隐蔽工程存在原材料质量不合格、隐蔽工程质量难追溯、检验方法陈旧、验收把关不严等问题。此文通过调研国内外隐蔽工程控制先进做法,提出加强原材料进场检验、强化施工过程管理、留存影像资料、提高验收要求等控制措施,并将控制措施要求纳入铁路电力、电牵施工质量验收标准,从而进一步提升铁路电力、电牵专业隐蔽工程施工质量控制,降低事故风险。 展开更多
关键词 隐蔽工程 进场检验 影像资料 铁路电力 铁路电牵
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Using Augmented Reality Techniques to Simulate Training and Assistance in Electric Power 预览
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作者 Zifeng Tang Jiyao Deng +4 位作者 Hao Gao Jiageng Song Qinlun Li Peixin Zhang Minghui Sun 《国际计算机前沿大会会议论文集》 2019年第2期587-589,共3页
In combination with the augmented reality (AR) technology and Hololens device, an electric power work assist system is developed to provide a more realistic and convenient training experience for electric power traini... In combination with the augmented reality (AR) technology and Hololens device, an electric power work assist system is developed to provide a more realistic and convenient training experience for electric power training. The training effect was improved, and help guidance information was provided in the actual operation of electric power work. Experimental results show that difficulty of electric power work is reduced and the efficiency of actual work is improved. 展开更多
关键词 ELECTRIC POWER simulation TRAINING ELECTRIC POWER work ASSISTANCE AUGMENTED reality Image recognition
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Regional power connectivity in Southeast Asia: the role of regional cooperation
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作者 Xunpeng Shi Lixia Yao Han Jiang 《全球能源互联网:英文版》 2019年第5期445-457,共13页
ASEAN is an interesting case study of regional power connectivity in Asia and the Pacific due to its geographic location and ongoing power connectivity within and beyond ASEAN.This paper reviews ASEAN’s power connect... ASEAN is an interesting case study of regional power connectivity in Asia and the Pacific due to its geographic location and ongoing power connectivity within and beyond ASEAN.This paper reviews ASEAN’s power connectivity within ASEAN and between ASEAN and its neighbours(hereafter ASEAN connectivity).Through literature survey,it identifies challenges to the ASEAN connectivity from political,legal,economic and technical perspectives.Based on these analyses,it then explores what,how and when regional cooperation may be able to facilitate ASEAN power connectivity. 展开更多
关键词 Power connectivity ASEAN China ASEAN Power Grid GMS.
Resilient Fixed-Order Distributed Dynamic Output Feedback Load Frequency Control Design for Interconnected Multi-Area Power Systems 预览
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作者 Ali Azarbahram Amir Amini Mahdi Sojoodi 《自动化学报:英文版》 CSCD 2019年第5期1139-1151,共13页
The paper proposes a novel H∞ load frequency control(LFC) design method for multi-area power systems based on an integral-based non-fragile distributed fixed-order dynamic output feedback(DOF) tracking-regulator cont... The paper proposes a novel H∞ load frequency control(LFC) design method for multi-area power systems based on an integral-based non-fragile distributed fixed-order dynamic output feedback(DOF) tracking-regulator control scheme. To this end, we consider a nonlinear interconnected model for multiarea power systems which also include uncertainties and timevarying communication delays. The design procedure is formulated using semi-definite programming and linear matrix inequality(LMI) method. The solution of the proposed LMIs returns necessary parameters for the tracking controllers such that the impact of model uncertainty and load disturbances are minimized. The proposed controllers are capable of receiving all or part of subsystems information, whereas the outputs of each controller are local. These controllers are designed such that the resilient stability of the overall closed-loop system is guaranteed. Simulation results are provided to verify the effectiveness of the proposed scheme. Simulation results quantify that the distributed(and decentralized) controlled system behaves well in presence of large parameter perturbations and random disturbances on the power system. 展开更多
关键词 Dynamic OUTPUT FEEDBACK CONTROL interconnected multi-area POWER systems load frequency CONTROL linear matrix INEQUALITIES POWER system CONTROL
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网络社会与传播力 预览 被引量:1
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作者 曼纽尔·卡斯特尔 曹书乐(译) +3 位作者 吴璟薇(译) 戴佳(译) 卢嘉(译) 金兼斌(译) 《全球传媒学刊》 CSSCI 2019年第2期74-92,共19页
权力来源于影响力,而影响力本质上是一种说服,常常需要借助策略性的传播,传播的权力由此产生。传播力是一切权力运作的核心要件。社会秩序的维护和改变,无不有赖于有效的传播,因此传播本质上是社会各利益相关方在特定技术、政治、社会... 权力来源于影响力,而影响力本质上是一种说服,常常需要借助策略性的传播,传播的权力由此产生。传播力是一切权力运作的核心要件。社会秩序的维护和改变,无不有赖于有效的传播,因此传播本质上是社会各利益相关方在特定技术、政治、社会、文化环境下的利益和价值观争霸和博弈的过程。传播又是天然具有偏向的,具有政治、资本和技术权力优势的一方,总是在这样的博弈中居于有利位置,因此技术赋权并不总是均等的。网络时代的传播力,一方面体现在国家和大企业对普通用户个人隐私和使用行为数据日益变本加厉的收集和滥用上,这种监视和用户数据滥权行为,常常以维护国家安全或改善用户使用体验之名行之;另一方面,这种传播力体现在我们的日常生活中较之以往任何时候,都更加依赖于技术平台和各种内容所构建的日常生活场域,尽管这样的平台具有各种偏向,而网络内容也常常真假难辨,体现了典型的后真相时代的交往实践之特点。在这样的时代,谁拥有作为一种影响力的传播力,谁就拥有这个时代真正的权力,从定义现象的性质,到推动变革的方向。 展开更多
关键词 权力 传播力 网络社会 监控 媒体政治 网络权力观
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