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allocation algorithm for Optical OFDM Multimode Fiber Communication System

FIBER AND INTEGRATED OPTICS 2009年第2期28卷 146-153页

作者： Xie, Wei Hu, Guijun Xing, Mingjie Li, Zhaoxi Jilin Univ Coll Commun Engn Dept Opt Commun Changchun 130012 Peoples R China

A fast bits allocation algorithm is proposed for adaptively modulated optical orthogonal frequency division multiplexing multimode fiber communication system to decrease the system bit error rate caused by some orthogonal frequency division multiplexing subcarriers being located at the deep nulls in the high-frequency region of multimode fiber. Based on a lookup table scheme, the new algorithm dramatically decreases the computational complexity of the Greedy algorithm. The simulation results show that the new algorithm has the same allocation result as the Greedy algorithm, but the computational complexity is considerably lower. In addition, adaptive bits allocation can effectively reduce the system bit error rate.

关键词： adaptive modulation allocation algorithm AMOOFDM multimode fiber communication

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allocation algorithm of CPS communication resources based on cooperative game

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COMPUTER COMMUNICATIONS 2020年 160卷 63-70页

作者： Zhao, Jin Dong, Qiuxia Shanghai Lixin Univ Accounting & Finance Sch Finance Shanghai 201209 Peoples R China Shanghai Univ Engn Sci Sch Management Studies Shanghai 201620 Peoples R China

In order to improve the communication rate of the cyber-physical fusion system, and at the same time guarantee the quality of system demand of each user, a CPS (Cyber-Physical Systems) communication resource allocation algorithm based on cooperative game was first proposed. The resource allocation process of the orthogonal frequency division multiple access network downlink in CPS is modeled as a cooperative game among multiple users, and the Pareto optimality among users is achieved by solving the Nash bargaining solution. Secondly, this paper studies the cooperative task assignment of communication resources for actuators in CPS execution network, and proposes a feasible task assignment method of communication resources based on K-M algorithm. Simulation experiments show that the task allocation result obtained by this method is better than that of auction method, and the algorithm running time can also meet the limit of actual demand. Finally, in consideration of the control center's need for fine control of the actuator, this paper studies the wireless resource allocation problem between a control center and the actuator, and maximizes the control effect of the actuator as the daily standard, and proposes a dynamic Joint allocation scheme of subchannels and power. Simulation results show that the proposed scheme can maintain a high level of control effect even when the transmission power of the control center is small, which effectively saves the energy consumption of the control center.

关键词： allocation algorithm CPS communication resources Information physics fusion system Cooperative game Orthogonal frequency division multiplexing

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AN allocation algorithm FOR DISTRIBUTING DATALOG PROGRAMS

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IEEE TRANSACTIONS ON SYSTEMS MAN AND CYBERNETICS 1993年第2期23卷 570-576页

作者： DAY, WB MCCREARY, CL WALLS, B NASA GEORGE C MARSHALL SPACE FLIGHT CTRHUNTSVILLEAL 35812

An O(N3) algorithm for partitioning and allocating N DataLog procedural bundles among K distributed or dedicated processors is presented. The algorithm determines a static distribution of the bundles to all K processors. The independent variables of the objective function include both processing and communication costs, and the goal is to balance the processing requirements of the K processors while allocating bundles in such a way as to reduce the communication costs. The algorithm can be used with heterogeneous systems of processors, and it can accommodate a two-tier communication model where both local area networks and more expensive wide area networks are used. Furthermore, the algorithm can be used interactively with a programmer or system designer. Example results from its implementation are given, and a comparison with another technique is shown.

关键词： Communication Research Distribute allocation algorithm Bundles Computer personnel algorithms Local Area Networks Objective function Independent Variables HETEROGENEOUS SYSTEM PROCESSOR

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A distributed resource allocation algorithm for many processes

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ACTA INFORMATICA 2013年第5-6期50卷 297-329页

作者： Hesselink, Wim H. Univ Groningen Groningen Netherlands

Resource allocation is the problem that a process may enter a critical section CS of its code only when its resource requirements are not in conflict with those of other processes in their critical sections. For each execution of CS, these requirements are given anew. In the resource requirements, levels can be distinguished, such as e.g. read access or write access. We allow unboundedly many processes that communicate by reliable asynchronous messages and have finite memory. A simple starvation-free solution is presented. Processes only wait for one another when they have conflicting resource requirements. The correctness of the solution is argued with invariants and temporal logic. It has been verified with the proof assistant PVS.

关键词： resource requirements Resource utilization critical zone Conflict (Psychology) management of resources Legal Executions Invariant allocation algorithm Temporal logic

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RAM allocation algorithm for video processing applications on FPGA

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JOURNAL OF CIRCUITS SYSTEMS AND COMPUTERS 2006年第5期15卷 679-699页

作者： Lawal, Najeem Thornberg, Benny O'Nils, Mattias Norell, Hakan Mid Sweden Univ Dept Informat Technol Elect Design Div SE-85170 Sundsvall Sweden

This paper presents an algorithm for the allocation of on-chip FPGA Block RAMs for the implementation of Real-Time Video Processing Systems. The effectiveness of the algorithm is shown through the implementation of realistic image processing systems. The algorithm, which is based on a heuristic, seeks the most cost-effective way of allocating memory objects to the FPGA Block RAMs. The experimental results obtained, show that this algorithm generates results which are close to the theoretical optimum for most design cases.

关键词： FPGA global block RAM allocation algorithm real-time video processing system

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Efficient resource allocation algorithm for uplink in multicarrier-based cognitive radio networks with fairness consideration

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IET COMMUNICATIONS 2011年第16期5卷 2328-2338页

作者： Shaat, M. Bader, F. Ctr Tecnol Telecomun Catalunya CTTC Castelldefels Barcelona 08860 Spain

An efficient fairness-aware uplink resource allocation algorithm in orthogonal frequency-division multiplexing-based cognitive radio systems is presented. The proposed resource allocation algorithm is divided into two steps. The subcarriers to user assignment is first performed, and then the power is allocated to the different subcarriers. The objective is to maximise the total data rate while guaranteeing that the interference introduced to the primary system is under the prescribed interference temperature limit. The fairness among users is considered within the subcarrier allocation by reducing the probability of having users whose instantaneous rates are below a given minimum rate. Many factors will be considered during the resource allocation process like the channel quality, potential interference caused to the primary bands, instantaneous rate achieved by every user and the increment in the total data rate. Simulation results confirm the efficiency of the proposed algorithm.

关键词： up link Resource utilization primary system Subcarriers Cognitive radio management of resources total Information allocation algorithm Radio networks

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A FOREIGN-EXCHANGE allocation algorithm FOR THE ACQUISITION OF KEY SPARE PARTS AND SUPPLIES IN A DEVELOPING-COUNTRY

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JOURNAL OF THE OPERATIONAL RESEARCH SOCIETY 1986年第2期37卷 167-180页

作者： ESOGBUE, AO GEORGIA INST TECHNOL SCH IND & SYST ENGNATLANTAGA 30332 USA

Most developing countries are severely constrained by the size of their foreign exchange reserve necessary for the purchase on the international market of certain key items to be employed in their industries, including the export sectors that are responsible for generating the foreign exchange in the first place. The scarcity of this foreign exchange creates enormous problems for these countries. To cope with this dilemma, certain countries resort to all kinds of gambles and approaches that may not be defensible. A rational basis for the allocation of this scarce resource is described in this article. It consists primarily of two components. The first part deals with an optimal strategy for the identification of key items through a criticality assignment routine. The second relates to the algorithm for allocating foreign exchange to a pool of critical items to maximize the returns from such an allocation. The case study is Guyana, a developing country in South America.

关键词： allocation algorithm developing countries economics foreign exchange

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Energy community ex-post electricity allocation algorithm based on participants? preferences

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ENERGY REPORTS 2023年 9卷 3822-3836页

作者： Fina, Bernadette AIT Austrian Inst Technol Giefinggasse 4 A-1210 Vienna Austria

With the first European Union (EU) member states enacting legislation for establishing energy communities (EC) based on the EU guidelines, the distribution system operators (DSOs) might be obliged in many countries to allocate electricity for the ECs based on a predefined distribution key. In Austria, such legislation has already become a reality. From the provided DSO data, it is only known how much electricity a participant purchased from the EC, but it is not known which participant purchased what exact amount of electricity from which peer and vice versa. To address this issue, an ex-post electricity allocation algorithm is developed based on participant preferences. Each participant can indicate a preference from which peer electricity is preferred. Knowing 'who sold how much to who' and 'who purchased how much from who' - which is the outcome of the ex-post allocation algorithm - enables applying peer-to-peer prices, empowering the ECs to increased individuality. The proposed algorithm is applied to a fictitious model EC of eight participants, four of which are equipped with a rooftop photovoltaic (PV) system. Two scenarios are investigated: one with well-distributed preferences and another with poorly distributed preferences. Based on this, the effects of differently distributed preferences on individual EC participants are assessed and discussed. It can be concluded that ex-post electricity allocation might become a powerful asset for ECs for the achievement of individual goals, despite being constrained by the original electricity allocation by the DSOs with severely limited room for individuality. (c) 2023 The Author(s). Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license (http://***/licenses/by-nc-nd/4.0/).

关键词： Ex-post electricity allocation Energy community allocation algorithm Participant preferences Peer-to-peer pricing Austria

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A spatially explicit reconstruction of cropland cover in China around 1850 CE employing new land suitability based gridded allocation algorithm

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QUATERNARY INTERNATIONAL 2022年 641卷 62-73页

作者： Zhang, Chengpeng Fang, Xiuqi Ye, Yu Tang, Chanchan Wu, Zhilei Zheng, Xue Zhang, Diyang Jiang, Chang Li, Jun Li, Yikai Zhao, Zhilong Beijing Normal Univ Fac Geog Sci Beijing 100875 Peoples R China Beijing Normal Univ Key Lab Environm Change & Nat Disaster Minist Educ Beijing 100875 Peoples R China Qinghai Normal Univ Coll Geog Sci Xining 811600 Qinghai Peoples R China Shaanxi Normal Univ Northwest Inst Hist Environm & Socio Econ Dev Xian 710062 Shaanxi Peoples R China

A credible spatially explicit historical cropland dataset is the basis for accurately evaluating the impacts of anthropogenic land cover change on global changes. The credibility of the historical cropland datasets relies on both the reconstructed regional cropland area and the allocation algorithm. In the case of adopting the more reliable reconstructed historical cropland area in a given region, the credibility of the gridded cropland cover data mainly depends on the allocation algorithm, which makes a major contribution to the uncertainties of the spatial distribution of the cropland cover. In this study, a new land suitability-based gridded allocation algorithm for historical cropland cover was used to allocate the provincial cropland area into 5' x 5 ' grids in China around 1850 C.E. The algorithm was constructed using the dominant physiogeographic factors that vary from region to region, and these factors were assessed by the modern cropland cover. The main conclusions are described as follows: (1) the cultivation intensity under a 5' x 5 ' cell can be effectively indicated by the physiogeographic factors in a 0.5 degrees x 0.5 degrees unit, although the degrees of correlation showed a diverse variety with positive, negative correlation or irrelevance relationships in different regions. (2) The land suitability calculated from dominant regional physiogeographic factors could appropriately represent the cultivation intensity. The proportion of positive correlations above 0.7 between the modern cropland fraction and land suitability in China is more than 93%. (3) Employing the newly developed allocation algorithm, the 5' x 5 ' cropland fraction data in China around 1850 C.E. was generated from the reconstructed provincial cropland area. The traditional farming regions were maturely cultivated in 1850 C.E., while the distribution of cropland was relatively small and had a lower cultivation intensity in the frontier region (Xinjiang Province and Northeast China, e

关键词： Historical cropland cover Physiogeographic factor Land suitability allocation algorithm China

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Extended criteria donor lungs and clinical outcome: Results of an alternative allocation algorithm

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JOURNAL OF HEART AND LUNG TRANSPLANTATION 2013年第11期32卷 1065-1072页

作者： Sommer, Wiebke Kuehn, Christian Tudorache, Igor Avsar, Murat Gottlieb, Jens Boethig, Dietmar Haverich, Axel Warnecke, Gregor Hannover Med Sch Dept Cardiothorac D-30625 Hannover Germany Hannover Med Sch Dept Transplant D-30625 Hannover Germany Hannover Med Sch Dept Vasc Surg D-30625 Hannover Germany Hannover Med Sch Dept Resp Med D-30625 Hannover Germany Hannover Med Sch Dept Pediat Cardiol & Intens Care Med D-30625 Hannover Germany

BACKGROUND: Despite the scarcity of donor lungs, most potential donor organs are not offered by organ lung transplantation;procurement organizations or are turned down by transplant centers because no suitable recipient is found extended criteria according to regular allocation. Although extended criteria donors (ECDs) have recently been considered by many donors;programs, the lung utilization rate remains <30% in most countries. The allocation policy of Eurotransplant for lung allocation;donor lungs that have been turned down for donor-related medical reasons by 3 centers is to attempt a rescue allocation algorithm;offer, for which centers choose the recipients themselves. At Hannover Medical School we systematically divert primary graft these organs to more stable recipients to avoid adverse transplant outcomes. We follow up on these transplants dysfunction;and compare them with those following regular allocation., outcomes METHODS: This study is an analysis of all organ offers and corresponding recipients at our center during the period from January 2010 to August 2011. RESULTS: A total of 183 lung transplantations were performed, 111 regular donor lung offers were accepted for their intended recipient, whereas a total of 72 rescue lung offers, including all extended criteria donors, were accepted for recipients selected by our center. Donor characteristics differed between the 2 groups accordingly. Median age of ECD organ donors was significantly higher than that of regular donors (46.0 [IQR 21] vs 40.0 [IQR 22] years, p = 0.02). Donor mechanical ventilation time did not differ (3.5 +/- 4.8 vs 3.0 +/- 4.0 days, p = 0.33, not statistically significant MD. Donor oxygenation ratio (PaO2:FIO2) at time of organ offer was significantly lower (398.3 +/- 110.3 vs 423.0 +/- 97.6 mm Hg, p = 0.02). Recipients of rescue allocation organs were older than regularly selected recipients (53.7 +/- 11.7 vs 46.7 +/- 15.4 years, p = 0.0003), needed a shorter time for mechanical ven

关键词： lung transplantation extended criteria donors lung allocation allocation algorithm primary graft dysfunction outcomes

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