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检索条件"主题词=Algorithm Design"

共 565 条记录，以下是461-470 订阅

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Global Model-Checking for Propositional µ-Calculus 6

Global Model-Checking for Propositional µ-Calculus

引用

6th International Conference on Information Communication and Signal Processing, ICICSP 2023

作者： Jiang, Hua Li, Lingxiang School of Computer Science and Engineering Huizhou University Huizhou China School of Information Engineering Hunan University of Science and Engineering Yongzhou China

ISBN: (纸本)9798350339994

On the basis of our previous research work, we have improved the core algorithm for global model checking of propositional µ-Calculus. While the improved algorithm has the same theoretical time and space complexity as the algorithm we did before, it reduces the number of iterations required to compute the fixed-point from the initial value, this results in lower computational requirements and faster convergence to the fixed-point value compared to the algorithm we did before. These improvements are beneficial for the wider application and promotion of propositional µ-Calculus global model checking techniques. © 2023 IEEE.

关键词： algorithm design computational complexity model checking µ-calculus

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How far from Kronecker can a MIMO channel be? Does it matter?

How far from Kronecker can a MIMO channel be? Does it matter...

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17th European Wireless Conference 2011, EW 2011

作者： Shariati, Nafiseh Bengtsson, Mats School of Electrical Engineering ACCESS Linnaeus Center KTH Royal Institute of Technology Stockholm Sweden

A common assumption in the design and analysis of many MIMO transmission schemes is the so-called Kronecker model. This model is often a crucial step to obtain mathematically tractable solutions, but has also been criticized for being unrealistic. In this paper, we present a numerical approach to determine a channel whose statistics is as far from being Kronecker as possible, keeping only an assumption of spatial stationarity. As a case study for the relevance of the Kronecker assumption, a numerical analysis is included of the performance of optimal pilot design for Kronecker and non-Kronecker channels. The numerical results indicate that for this particular application, the Kronecker assumption may be used in the algorithm design and provide performance that is close to optimal also for non-Kronecker channels. © VDE VERLAG GMBH.

关键词： algorithm design Matter Optimal

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LP-based Approximation for Personalized Reserve Prices 19

LP-based Approximation for Personalized Reserve Prices

引用

20th ACM Conference on Economics and Computation (ACM EC) held as part of the ACM Federated Computing Research Conference

作者： Derakhshan, Mahsa Golrezaei, Negin Leme, Renato Paes Univ Maryland Baltimore MD 21201 USA MIT Sloan Sch Management Cambridge MA 02139 USA Google Res Mountain View CA USA Google Mountain View CA USA

ISBN: (纸本)9781450367929

We study the problem of computing personalized reserve prices in eager second price auctions without having any assumption on valuation distributions. Here, the input is a dataset that contains the submitted bids of n buyers in a set of auctions and the goal is to return personalized reserve prices r that maximize the revenue earned on these auctions by running eager second price auctions with reserve r. We present a novel LP formulation to this problem and a rounding procedure which achieves a (1+2(√2-1)e√2-2)-1≅0.684-approximation. This improves over the 1/2-approximation algorithm due to Roughgarden and Wang. We show that our analysis is tight for this rounding procedure. We also bound the integrality gap of the LP, which bounds the performance of any algorithm based on this LP.

关键词： Auctions algorithm design Approximation algorithms

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design and Analysis of Networks under Strategic Behavior 21

Design and Analysis of Networks under Strategic Behavior

引用

Proceedings of the 20th International Conference on Autonomous Agents and MultiAgent Systems

作者： Sixie Yu Washington University in St. Louis St. Louis MO USA

ISBN: (纸本)9781450383073

Networks are enablers, allowing the diffusion of valuable information. But just as a network is a conduit for valuable information, so it is for misinformation. One major challenge in a networked environment is limiting the spread of misinformation. Consider a large online social network, such as Twitter. Unethical users spread anti-social posts, which negatively affect other users and damage community dynamics[6], fraudsters send spam and phishing emails that threaten people's financial security[7], accounts occupied by malicious parties spread toxic information (e.g., hate speech, fake news), stirring up controversy and manipulating political views among social network users[1], fake reviews posted by bots mislead consumers' decision making[15], etc. An intuitive idea to limit the spread of misinformation is removing malicious nodes from networks, for example, terminate accounts on Twitter that spread spam. Importantly, a principled method to decide which nodes to remove from a network has wide applications; in the case of infectious disease, the inoculation of a group of people is essentially "removing" them from the contagion network[2,5,8,12,16-19]. A critical observation is that the loss associated with a decision whether to remove a node depends both on the node's likelihood of being malicious and its local network structure. Consequently, the typical approach in which we simply classify nodes as malicious or benign using a threshold on the associated maliciousness probability[10] is inadequate, as it fails to account for network consequences of such decisions. Rather, the problem is fundamentally about choosing which subset of nodes to remove, as decisions about removing individual nodes are no longer independent. We developed a model that provides decisions about which nodes to remove[20]. The model considers both the likelihood of nodes being malicious and their local network structures. Several algorithmic insights are derived from studying the model, inc

关键词： games on networks algorithm design machine learning game theory relational learning network design optimization

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IEEE802.11k enabled adaptive carrier sense management mechanism (KAPCS2)

IEEE802.11k enabled adaptive carrier sense management mechan...

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IFIP/IEEE International Symposium on Integrated Network Management

作者： Thorpe, Christina Murphy, Sean Murphy, Liam School of Computer Science and Informatics University College Dublin Belfield Dublin 4 Ireland

ISBN: (纸本)9781424492213

The existence of hidden and exposed nodes can have a significant negative impact on the performance of IEEE802.11 networks. Such nodes can increase the probability of collisions and limit the spatial reuse on the channel. The value of the Physical Carrier Sensing Threshold (PCST) is instrumental in the presence of such nodes in a system. This paper presents a new adaptive physical carrier sensing management algorithm for wireless networks. Our KAPCS2 management system maximizes the aggregate system throughput by identifying and addressing problem nodes. It incorporates 802.11k Radio Resource Measurements (RRM) on each node to enable on-line tuning of the PCST. © 2011 IEEE.

关键词： Aggregates algorithm design IEEE 802.11 Standards IEEE 802.11k enabled adaptive carrier sense management mechanism IEEE 802.11k radio resource measurements KAPCS2 management system Markov processes PCST Performance optimization Simulation Time measurement Wireless communication Wireless sensor networks physical carrier sensing threshold telecommunication network management wireless LAN wireless networks

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Research on the Model of Complex Network Based Key Information Extracting in Power Engineering Technical Transformation and Overhaul Project 6

Research on the Model of Complex Network Based Key Informati...

引用

2023 IEEE 6th International Conference on Information Systems and Computer Aided Education, ICISCAE 2023

作者： Dong, Wang Lingwen, Weng Jia, Liu Tianlong, Wang Cheng, Guan Jinhu, Li State Grid Fujian Electric Power Co. Ltd Integrated Services Center Fuzhou350001 China State Grid Fujian Electric Information and Telecommunication Company Fuzhou350001 China State Grid Info-Telecom Great Power Science and Technology Company Fuzhou350001 China

ISBN: (纸本)9798350313444

A huge amount of data is generated in power system every year, which covers the information in different aspects such as grid production, operation, customer service and maintenance, reflecting the actual production and operation of power grid. However, the information contained in it has not been fully mined. Therefore, it becomes a major concern among managers to extract key information, specifically speaking, locating the emphases from the huge information system, "extracting"the information and "getting"the key information so as to improve the working efficiency. In this paper, the author carries out research on key information extraction in power engineering technical transformation and overhaul projects based on relevant knowledge such as text mining and complex network, exactly digging out the key information through "algorithm parsing and data extracting", which provides data basis for the effective implementation of power engineering technical transformation and overhaul in the future. © 2023 IEEE.

关键词： algorithm design Complex Network Key Information Text Data

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Optimal input design for non-linear dynamic systems: a graph theory approach

Optimal input design for non-linear dynamic systems: a graph...

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IEEE Annual Conference on Decision and Control

作者： Patricio E. Valenzuela Cristian R. Rojas Hakan Hjalmarsson Automatic Control Lab and ACCESS Linnaeus Center School of Electrical Engineering KTH-Royal Institute of Technology SE-100 44 Stockholm Sweden

ISBN: (纸本)9781467357159

In this article a new algorithm for the design of stationary input sequences for system identification is presented. The stationary input signal is generated by optimizing an approximation of a scalar function of the information matrix, based on stationary input sequences generated from prime cycles, which describe the set of finite Markov chains of a given order. This method can be used for solving input design problems for nonlinear systems. In particular it can handle amplitude constraints on the input. Numerical examples show that the new algorithm is computationally attractive and that is consistent with previously reported results.

关键词： Input design Input sequence information matrix Nonlinear dynamical systems SCALAR FUNCTIONS algorithm design input signal Graph theory System identification amplitude constraint

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A Dynamic Taxi Ride Sharing System Using Particle SwarmOptimization

A Dynamic Taxi Ride Sharing System Using Particle SwarmOptim...

引用

作者： Silwal, Shrawani Miami University

学位级别：硕士

With the rapid growth of on-demand taxi services, like Uber, Lyft, etc., urban public transportation scenario is shifting towards a personalized transportation choice for most commuters. While taxi rides are comfortable and time efficient, they often lead to higher cost and road congestion due to lower overall occupancy than bigger vehicles. A possible solution to improve taxi occupancy is to adopt ride sharing. Existing ride sharing solutions are mostly centralized and proprietary. How- ever, given the wide spatio-temporal variation of incoming ride requests designing a dynamic and distributed shared-ride scheduling system is NP-hard. In this thesis, we have proposed a publisher (passengers) and subscriber (taxis) based ride sharing system that provides effective real-time ride scheduling for multiple passengers willing to share rides in part or in full. A particle swarm based route optimization strategy has been applied to determine the most preferable route for passengers. Empirical analysis using large scale single-user taxi ride records from Chicago Transit Authority, show that, our proposed system, ensures a maximum of 91.74% and 63.29% overall success rates during peak and non-peak hours, respectively.

关键词： Computer Science Ride-Sharing Particle Swarm Optimization algorithm design

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Integrated circuit system design based on “PLC” programming technology and the development of the device which can monitor the concentration of pollutants continuously on-line

Integrated circuit system design based on “PLC” programmin...

引用

2015 5th International Conference on Computer Sciences and Automation Engineering(ICCSAE 2015)

作者： Yuchuan Huang School of North China Electric Power University

In China, the number of the power station increases quickly. According to the information from the Internet, From 2001 to August 2005, State Environmental Protection Administration has approved 472 thermal power projects, and the installed capacity is as much as 344382 *** which, 135 thermal power projects are approved in 2001, the installed capacity is as much as 107590 MW, 207% more than last year;213 thermal power projects are approved From January to August in 2005, the installed capacity is as much as 168546 MW, 420% more than last *** these power stations all come online, Chinese installed capacity will be as much as 5.82 billion KW, 145% more than 2000. In December 2006, the growth of the power stations keeps high *** same month, the whole country’s generating capacity was 2266 billion kilowatt-hour, 15.5% more than last *** the rise of the winter electricity consumption, the generating capacity of power projects increased *** genearating capacity of power projects in December was 10.9% more than last *** January to December in 2006 the whole country’s generating capacity was 23009 billion kilowatt-hour, 15.08% more than last *** January to October in 2007 the whole country’s generating capacity was 21756 billion kilowatt-hour, 16.04% more than last *** generating capacity in August had the largest number, which was 2390 billion kilowatt-hour, 10.19% more than last year.

关键词： Online data acquisition system power serial port communication algorithm design integrated circuit system PLC programming

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Natural language processing of online propaganda as a means of passively monitoring an adversarial ideology

Natural language processing of online propaganda as a means ...

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作者： Raven R. Holm Naval Postgraduate School

学位级别：硕士

Online propaganda embodies a potent new form of warfare; one that extends the strategic reach of our adversaries and overwhelms analysts. Foreign organizations have effectively leveraged an online presence to influence elections and distance-recruit. The Islamic State has also shown proficiency in outsourcing violence, proving that propaganda can enable an organization to wage physical war at very little cost and without the resources traditionally required. To augment new counter foreign propaganda initiatives, this thesis presents a pipeline for defining, detecting and monitoring ideology in text. A corpus of 3,049 modern online texts was assembled and two classifiers were created: one for detecting authorship and another for detecting ideology. The classifiers demonstrated 92.70% recall and 95.84% precision in detecting authorship, and detected ideological content with 76.53% recall and 95.61% precision. Both classifiers were combined to simulate how an ideology can be detected and how its composition could be passively monitored across time. Implementation of such a system could conserve manpower in the intelligence community and add a new dimension to analysis. Although this pipeline makes presumptions about the quality and integrity of input, it is a novel contribution to the fields of Natural Language Processing and Information Warfare.

关键词： data mining natural language processing machine learning algorithm design information warfare propaganda

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