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Joint Subcarrier and Power Allocation for Multi-UAV Systems 预览
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作者 Xin Guan Yang Huang Qingjiang Shi 《中国通信:英文版》 SCIE CSCD 2019年第1期47-56,共10页
This paper investigates subcarrier and power allocation in a multi-UAV OFDM system.The study considers a practical scenario,where certain subcarriers are unavailable for dynamic subcarrier allocation,on account of pre... This paper investigates subcarrier and power allocation in a multi-UAV OFDM system.The study considers a practical scenario,where certain subcarriers are unavailable for dynamic subcarrier allocation,on account of pre-allocation for burst transmissions.We first propose a novel iterative algorithm to jointly optimize subcarrier and power allocation,so as to maximize the sum rate of the uplink transmission in the multi-UAV OFDM system.The key idea behind our solution is converting the nontrivial allocation problem into a weighted mean square error(MSE)problem.By this means,the allocation problem can be solved by the alternating optimization method.Besides,aiming at a lower-complexity solution,we propose a heuristic allocation scheme,where subcarrier allocation and transmit power allocation are separately optimized.In the heuristic scheme,closedform solution can be obtained for power allocation.Simulation results demonstrate that in the presence of stretched subcarrier resource,the proposed iterative joint optimization algorithm can significantly outperform the heuristic scheme,offering a higher sum rate. 展开更多
关键词 MULTI-UAV OFDM SUBCARRIER ALLOCATION power ALLOCATION ALTERNATING optimization weighted MSE
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Evolution and Outlook of Resource Allocation Mechanism in the Age of Internet 预览
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作者 He Da’an Ren Xiao Tan Xiaomei 《当代社会科学(英文)》 2019年第2期94-106,共13页
In today’s society, the Internet, big data and artificial intelligence are being integrated and the mechanisms of resource allocations are also evolving, mainly because of the changes in background factors, means, an... In today’s society, the Internet, big data and artificial intelligence are being integrated and the mechanisms of resource allocations are also evolving, mainly because of the changes in background factors, means, and processes that influence resource allocation. To analyze and study this evolution, we need to combine resource allocation, industrial organization, and industrial regulation theories to determine the driving and restricting factors new technologies bring to business-to-business and business-to-consumer interactions and how the combination of internet, big data and AI will impact productivity and pricing. We must also analyze the differences between today’s supply-demand and pricing processes and those of the industrial age to discover whether there are special resource allocation mechanisms in this era and how to summarize them theoretically. This paper reviews the evolved resource allocation mechanisms at the present stage of the integration of the Internet, big data and AI based on resource allocation theories from classical Marxian, neoclassical, and modern western economics. 展开更多
关键词 INTERNET RESOURCE ALLOCATION big data artificial intelligence INTERNET-BASED RESOURCE ALLOCATION MECHANISM
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MAV/UAV task coalition phased-formation method 预览
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作者 JIAO Zhiqiang YAO Peiyang +2 位作者 ZHANG Jieyong ZHONG Yun WANG Xun 《系统工程与电子技术:英文版》 SCIE EI CSCD 2019年第2期402-414,共13页
The formation of the manned aerial vehicle/unmanned aerial vehicle(MAV/UAV) task coalition is considered. To reduce the scale of the problem, the formation progress is divided into three phases. For the task clusterin... The formation of the manned aerial vehicle/unmanned aerial vehicle(MAV/UAV) task coalition is considered. To reduce the scale of the problem, the formation progress is divided into three phases. For the task clustering phase, the geographical position of tasks is taken into consideration and a cluster method is proposed. For the UAV allocation phase, the UAV requirement for both constrained and unconstrained resources is introduced, and a multi-objective optimal algorithm is proposed to solve the allocation problem. For the MAV allocation phase, the optimal model is firstly constructed and it is decomposed according to the ideal of greed to reduce the time complexity of the algorithm. Based on the above phases, the MAV/UAV task coalition formation method is proposed and the effectiveness and practicability are demonstrated by simulation examples. 展开更多
关键词 TASK coalition formation TASK clustering unmanned AERIAL VEHICLE (UAV) ALLOCATION manned AERIAL VEHICLE (MAV) ALLOCATION
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基于工作量为基础的医院行政后勤绩效考核探索 预览
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作者 苏建华 肖卫平 +1 位作者 王双斌 狄晓晨 《江苏卫生事业管理》 2019年第7期840-842,共3页
目的:在新医改背景下,构建体现公平性的新型行政后勤二级单元绩效评价与分配体系。方法:引入以资源投入为基础的相对价值比率绩效体系,建立医院内部岗位相对价值比较机制,实现医疗、护理、医技、行政后勤分开考核,独立设置行政后勤单元... 目的:在新医改背景下,构建体现公平性的新型行政后勤二级单元绩效评价与分配体系。方法:引入以资源投入为基础的相对价值比率绩效体系,建立医院内部岗位相对价值比较机制,实现医疗、护理、医技、行政后勤分开考核,独立设置行政后勤单元绩效分配方案,抽取绩效改革前、后行政后勤二级单元同期月均绩效进行比较。结果:新绩效分配方案实施后,绩效分配向工作量大、技术强的个人倾斜。结论:基于RBRVS以工作量为基础的行政后勤二级单元绩效分配方案,能够体现后勤工作的数量、质量,可以充分调动后勤人员积极性,并作为行政后勤二级单元绩效分配的依据。 展开更多
关键词 RBRVS 工作量 行政后勤 绩效评价 分配
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贵州省卫生人力资源配置公平性分析 预览
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作者 周明华 冯毅 《医学与社会》 北大核心 2019年第7期36-39,共4页
目的:探讨贵州省卫生人力资源配置的公平性,为卫生行政部门决策提供依据。方法:采用基尼系数和泰尔指数分析贵州省卫生人力资源配置的公平性。结果:贵阳市每千人口和每平方千米的卫生资源除了乡村医生和卫生员外,其余指标明显高于其他市... 目的:探讨贵州省卫生人力资源配置的公平性,为卫生行政部门决策提供依据。方法:采用基尼系数和泰尔指数分析贵州省卫生人力资源配置的公平性。结果:贵阳市每千人口和每平方千米的卫生资源除了乡村医生和卫生员外,其余指标明显高于其他市(州)。2011-2016年各类卫生资源按人口配置的基尼系数处于0.3以下,为相对平均(或高度平均);按地理配置的基尼系数均在0.4以下,配置相对合理(或相对平均);6年期间卫生资源的基尼系数基本处于下降趋势。卫生人力资源的泰尔指数在0.010-0.047之间,卫生人力资源的不公平性主要来自于区域间。结论:贵州省卫生资源总体缺口明显,应继续加大投入,引进卫生人才。卫生资源按人口配置的公平性优于按地理分布的公平性,基尼系数基本处于下降趋势;区域间的差异是卫生人力资源不公平的主要原因,应对少数民族地区进行倾斜,逐渐缩小地区间的差距。 展开更多
关键词 卫生人力资源 配置 公平性 贵州
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深圳市乙类大型医用设备配置数量预测研究 预览
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作者 何达 《中国卫生资源》 北大核心 2019年第1期62-65,共4页
目的采用指数平滑法,对2020年和2030年深圳市乙类大型医用设备配置数量作出合理的预测。方法通过深圳市卫生和计划生育委员会收集20092017年深圳市乙类大型医用设备配置情况,采用指数平滑法对2020年和2030年设备配置量进行预测。结果指... 目的采用指数平滑法,对2020年和2030年深圳市乙类大型医用设备配置数量作出合理的预测。方法通过深圳市卫生和计划生育委员会收集20092017年深圳市乙类大型医用设备配置情况,采用指数平滑法对2020年和2030年设备配置量进行预测。结果指数平滑法预测2020年和2030年深圳市的计算机断层扫描、磁共振成像、数字减影血管造影、单光子发射计算机断层扫描和直线加速器5种设备配置数量分别为258和587台、174和477台、130和374台、39和112台、31和96台。结论本研究采用指数平滑法对深圳市乙类大型医用设备配置数量预测和规划,具有较好的参考价值。 展开更多
关键词 大型医用设备 配置 数量预测 指数平滑法 一次指数平滑值 二次指数平滑值
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Collaborative Optimization of Berth Allocation and Yard Storage in Container Terminals 预览
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作者 Wenwen Guo Mingjun Ji Huiling Zhu 《交通与运输工程:英文版》 2019年第2期56-70,共15页
Considering the interaction between the berth and the yard,this paper studies the collaborative optimization problem of berth allocation and yard storage from the point of the ships over a certain planning period.This... Considering the interaction between the berth and the yard,this paper studies the collaborative optimization problem of berth allocation and yard storage from the point of the ships over a certain planning period.This collaborative optimization problem is formulated as the integer programming,which aims at minimizing the total truck travel distance.And decision variables are the berthing positions for visiting ships and the storage positions for export containers.Meanwhile,this paper demonstrates the complexity of the problem in theory.And the hybrid tabu genetic algorithm is designed to solve the problem to obtain the optimal berth allocation position and export container storage position.For this algorithm,the rule is applied to generate the initial feasible solutions,and the crossover and mutation operation are simultaneously applied to optimize the initial solutions.Finally,this paper discusses two different scenes:the same berth scene and the same ship scene.The influence of two different scenes on truck travel distance is analyzed by different numerical examples.Numerical examples’results show that the collaborative optimization of berth allocation and yard storage can effectively shorten the truck travel distance and improve the efficiency of terminal operation,which provides the decision support for terminal operators. 展开更多
关键词 EXPORT containers BERTH ALLOCATION YARD STORAGE COLLABORATIVE optimization hybrid tabu genetic algorithm
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Exploiting Spectral-Energy Efficiency Tradeoff with Fairness in Non-Orthogonal Multiple Access Systems 预览
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作者 Zhengyu Song Xin Sun 《北京理工大学学报:英文版》 EI CAS 2019年第2期336-343,共8页
The spectral efficiency(SE)and energy efficiency(EE)tradeoff while ensuring rate fairness among users in non-orthogonal multiple access(NOMA)systems is investigated.In order to characterize the SE-EE tradeoff with rat... The spectral efficiency(SE)and energy efficiency(EE)tradeoff while ensuring rate fairness among users in non-orthogonal multiple access(NOMA)systems is investigated.In order to characterize the SE-EE tradeoff with rate fairness,a multi-objective optimization(MOO)problem is first formulated,where the rate fairness is represented with theα-fair utility function.Then,the MOO problem is converted into a single-objective optimization(SOO)problem by the weighted sum method.To solve the converted non-convex SOO problem,we apply sequential convex programming,which helps to propose a general power allocation algorithm to realize the SE-EE tradeoff with rate fairness.We prove the convergence of the proposed algorithm and the convergent solution satisfies the KKT conditions.Simulation results demonstrate the proposed power allocation algorithm can achieve various levels of rate fairness,and higher fairness results in degraded performance of SE-EE tradeoff.A pivotal conclusion is reached that NOMA systems significantly outperform orthogonal multiple access systems in terms of SE-EE tradeoff with the same level of rate fairness. 展开更多
关键词 non-orthogonal multiple access(NOMA) energy efficiency(EE) SPECTRAL efficiency(SE) rate FAIRNESS power ALLOCATION
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国家会计信息质量与世界银行贷款分配的相关性研究——基于45个国家面板数据的实证检验 预览
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作者 王永海 杨湘琳 《中国软科学》 CSSCI CSCD 北大核心 2019年第6期118-128,共11页
基于2008-2017年世界银行45个成员国的贷款数据,运用面板数据模型,对国家会计信息质量与世界银行贷款分配的相关性进行实证检验。结果表明,世界银行贷款分配与成员国的国家会计信息质量呈正相关关系。进一步研究发现,世界银行贷款在分... 基于2008-2017年世界银行45个成员国的贷款数据,运用面板数据模型,对国家会计信息质量与世界银行贷款分配的相关性进行实证检验。结果表明,世界银行贷款分配与成员国的国家会计信息质量呈正相关关系。进一步研究发现,世界银行贷款在分配时会受到与美国政治关系的影响;在腐败程度相对较高的国家,会计信息质量与世界银行贷款分配的正相关性更加显著。最后,根据实证结论对我国世界银行贷款提出了相关政策建议。 展开更多
关键词 世界银行 会计信息质量 贷款 分配
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四川省护理人力资源配置现状及公平性研究 预览
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作者 曹勍 赵大仁 +5 位作者 周明华 谭君梅 杜鑫 徐泽俊 张翻蓉 王刚 《医学与社会》 北大核心 2019年第7期40-43,共4页
目的:评价四川省护理人力资源配置现状及其公平性,为优化护理人力资源配置提供参考依据。方法:数据来源于2015-2016年四川省卫生和计划生育统计年鉴、2017年四川省卫生健康统计年报及2015-2017年四川统计年鉴,采用描述性分析、基尼系数... 目的:评价四川省护理人力资源配置现状及其公平性,为优化护理人力资源配置提供参考依据。方法:数据来源于2015-2016年四川省卫生和计划生育统计年鉴、2017年四川省卫生健康统计年报及2015-2017年四川统计年鉴,采用描述性分析、基尼系数与泰尔指数进行分析。结果:四川省"十三五"期间护理队伍得到进一步壮大,实现较快速增长,每千人口注册护士数2.87人,2015-2017年四川省各市(州)护理人力资源按人口、地理面积分布的基尼系数分别为0.1787、0.7157,0.0383、0.7222,0.0171、0.7184,区域间泰尔指数按人口、地理面积分布分别为0.0234-0.0533、0.2541-0.2743。结论:四川省护理人力资源总量得到改善,护理人力资源结构尚需优化,注册护士配置不均衡,护理人力资源配置人口公平性优于地理公平性。 展开更多
关键词 护理人力资源 配置 公平性 四川
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水资源综合模拟与调配模型WAS(Ⅱ):应用 预览 被引量:1
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作者 桑学锋 赵勇 +1 位作者 翟正丽 常奂宇 《水利学报》 EI CSCD 北大核心 2019年第2期201-208,共8页
针对自然-社会水循环系统特点以及水资源管理实践需求,建立一种断面流量过程、断面特征频率径流总量、区域水资源配置总量多指标模型校验方法,并以甘肃省庆阳市为例开展WAS模型(Water Allocation and Simu?lation Model)构建与应用。模... 针对自然-社会水循环系统特点以及水资源管理实践需求,建立一种断面流量过程、断面特征频率径流总量、区域水资源配置总量多指标模型校验方法,并以甘肃省庆阳市为例开展WAS模型(Water Allocation and Simu?lation Model)构建与应用。模型在雨落坪站水文断面调参期(1967—1985年)年径流模拟的相关系数R2为0.89,Nash系数为0.79,校验期(1986—2000年)年径流模拟的相关系数R2为0.88,Nash系数为0.76;区域多年平均水资源总量模拟与实测误差为4.1%,25%、50%、75%和90%频率年误差分别为5.0%、1.1%、5.9%和4.2%;全市水资源配置总量误差为0.35%。在此基础上,提出庆阳市各水资源分区和行政分区的水资源配置方案以及全市自然-人工水资源循环转化图;分析表明,WAS模型在描述自然-社会水循环系统动态反馈方面具有一定优势,模型可以支撑水资源精细化评价和管理需求。 展开更多
关键词 水资源 模拟 调配 校验 水资源评价 水资源管理
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A Near Optimal Power Allocation Scheme for Cooperative Relay Networking with NOMA 预览
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作者 Haiyang Yu Wei Duan +3 位作者 Guoan Zhang Yancheng Ji Xiaojun Zhu Jaeho Choi 《中国通信:英文版》 SCIE CSCD 2019年第3期122-131,共10页
In this paper,we propose cooperative relay networks with non-orthogonal multiple access in order to design a near-optimal power allocation strategy.Like other next generation wireless technologies,spatially multiplexe... In this paper,we propose cooperative relay networks with non-orthogonal multiple access in order to design a near-optimal power allocation strategy.Like other next generation wireless technologies,spatially multiplexed transmissions are achieved by relay nodes which enables decode-and-forward relaying of a new superposition code after reception from the source.It is worth noting that,since it is hard to exactly prove the proposed PA scheme,due the fact that it is one kind of the approximate conjectures.Therefore,mathematical and numerical methods have been used to clarify the feasibility of the proposal.Numerical results indicate that it is able to asymptotically achieve the optimal sum rate at the higher signal-to-noise ratio region with the proposed strategy applied instead of negligible performance loss. 展开更多
关键词 non-orthogonal multiple access COOPERATIVE multi-relay networks DECODE-AND-FORWARD TWO-STAGE power ALLOCATION
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Optimal power allocation for secure directional modulation networks with a full-duplex UAV user
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作者 Zaoyu LU Linlin SUN +6 位作者 Shuo ZHANG Xiaobo ZHOU Jinyong LIN Wenlong CAI Jin WANG Jinhui LU Feng SHU 《中国科学:信息科学(英文版)》 SCIE EI CSCD 2019年第8期40-51,共12页
This paper makes an investigation of a secure unmanned aerial vehicle(UAV)-aided communication network based on directional modulation(DM). In this network, ground base station(GBS) acts as a control center to transmi... This paper makes an investigation of a secure unmanned aerial vehicle(UAV)-aided communication network based on directional modulation(DM). In this network, ground base station(GBS) acts as a control center to transmit confidential message and artificial noise(AN). The UAV user, moving along a linear flight trajectory, is intended to receive the useful information from GBS. At the same time, it also sends AN signals to further interference eavesdropper’s channel. Aiming at maximizing secrecy rate during the UAV flight process, a joint optimization problem is formulated with respect to power allocation(PA)factors, beamforming vector and AN projection matrices. For simplicity, maximum rate transmission, nullspace projection and the leakage-based method are applied to form the transmit beamforming vector, AN projection matrix at GBS, and AN projection vector at UAV user, respectively. Following this, the optimization problem reduces to a bivariate optimization programme with two PA factors. An alternating iterative algorithm(AIA) is proposed to optimize the two PA factors. Simulation results demonstrate that, compared to the half-duplex(HD) mode, the proposed strategy for full-duplex(FD) mode achieves a higher secrecy rate(SR) and outperforms the FD mode with fixed PA strategy. 展开更多
关键词 UAV directional MODULATION SECRECY rate artificial noise full-duplex power ALLOCATION
湖北省区域卫生资源分类研究 预览
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作者 李炳辉 刘智勇 +3 位作者 李雨晨 春兰 徐佳念 李敏 《中国卫生资源》 北大核心 2019年第2期106-110,共5页
目的对湖北省卫生资源配置状况与水平进行分类,了解不同地区卫生资源发展差异,为卫生资源规划决策提供参考.方法采用熵权-TOPSIS法和聚类分析法对湖北省的卫生资源配置水平进行综合评价并进行分类研究.结果将湖北省17个地区分为3类,其... 目的对湖北省卫生资源配置状况与水平进行分类,了解不同地区卫生资源发展差异,为卫生资源规划决策提供参考.方法采用熵权-TOPSIS法和聚类分析法对湖北省的卫生资源配置水平进行综合评价并进行分类研究.结果将湖北省17个地区分为3类,其中武汉、十堰、宜昌卫生资源配置水平相对较好;襄阳、荆门、恩施、黄石、咸宁、潜江配置较差.结论湖北省区域卫生资源之间存在差异性,建议优化地区间医疗卫生资源的布局和结构,加强卫生人力资源建设,缩小地区间资源配置差异,合理增加医疗卫生机构床位数. 展开更多
关键词 TOPSIS法 聚类分析 卫生资源 配置 卫生规划 湖北省
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20世纪90年代以来世界能源安全时空格局演化过程(英文)
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作者 王强 徐玲琳 +4 位作者 李娜 杜雪 伍世代 田兰蓝 吴琛璐 《地理学报:英文版》 SCIE CSCD 2019年第8期1245-1260,共16页
In this study, we developed an energy security evaluation model(ESEM) from three dimensions, energy supply-transport security, safety of energy utilization, and stability of political-socioeconomic environment, based ... In this study, we developed an energy security evaluation model(ESEM) from three dimensions, energy supply-transport security, safety of energy utilization, and stability of political-socioeconomic environment, based on the integrated application of subjective and objective weight allocation technique. Then the spatial-temporal evolution of global energy security pattern and its driving mechanism was analyzed with the method above, and the results are shown as follows:(1) since the 1990 s, the spatial patterns of global energy security have shown a deteriorating trend, with the growth of countries in at-risk type and relatively at-risk type.(2) The spatial distribution of countries with secure energy system shows a strong stability, and these countries are concentrated persistently in Western Europe and North America. The spatial evolution of countries with relatively secure energy system also presents a strong stability, which are mainly distributed in the periphery of the secure ones, namely Central and Southern Europe, South America and Eurasia, while countries with general energy system are mainly distributed in Asia, Africa and Southern Europe, and the spatial-temporal evolution of this type is the main cause for the deterioration of world energy security pattern. Countries with at-risk and relatively at-risk energy system are mainly concentrated in Africa, Asia, the Middle East and Eurasia, rendering spatial extension to the east and south.(3) In the past 20 years, the mechanism for world’s energy security pattern formation gradually transforms from the ‘unitary dimension dominated’ to the ‘binary dimension-dominated’, and the main factors influencing the global energy security pattern become more diverse.(4) In the pattern of world’s energy security, China’s performance on energy security has been the global average since the 1990 s, which shows a decreasing trend in safety of energy utilization dimension. Findings in this study can provide a reference for the government in terms of formulati 展开更多
关键词 ENERGY SECURITY spatial-temporal EVOLUTION subjective-objective WEIGHT ALLOCATION method the globe
河南省卫生人力资源配置集聚度评价 预览
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作者 贺君剑 付先知 +2 位作者 李众 魏长慧 孙长青 《医学与社会》 北大核心 2019年第9期14-19,共6页
目的:分析河南省卫生人力资源配置的公平性,发现问题并探索优化配置的方案。方法:收集整理2012-2016年河南省卫生人力资源配置数据,在考量人口和经济因素的同时运用集聚度分析的方法评价该省卫生人力资源配置的公平性。结果:总体而言,... 目的:分析河南省卫生人力资源配置的公平性,发现问题并探索优化配置的方案。方法:收集整理2012-2016年河南省卫生人力资源配置数据,在考量人口和经济因素的同时运用集聚度分析的方法评价该省卫生人力资源配置的公平性。结果:总体而言,河南省卫生人力资源配置的公平性较好,但不同区域间卫生人力资源的分布差异较为显著,卫生人力资源集聚度在考量人口和经济指标时差异较为明显。结论:河南省卫生人力资源配置存在地域性失衡,应该在充分考虑区位因素的前提下纳入人口和经济因素,缩小地区间差异,提高卫生人力资源布局公平性。 展开更多
关键词 卫生人力资源 配置 公平性 河南
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数据警察权的配置问题研究 预览
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作者 赫广平 《人民论坛·学术前沿》 CSSCI 北大核心 2019年第18期100-103,共4页
数据警察权的配置问题是智慧公安法治逻辑的重要组成内容。数据警察权实现了警察权与“智能化”技术的结构耦合,具有进行社会公共安全风险预测、预警、预防的治理功能。数据警察权的配置根据在于警察法体系中的预防任务与预防性职权配... 数据警察权的配置问题是智慧公安法治逻辑的重要组成内容。数据警察权实现了警察权与“智能化”技术的结构耦合,具有进行社会公共安全风险预测、预警、预防的治理功能。数据警察权的配置根据在于警察法体系中的预防任务与预防性职权配置。数据警察权的权力谱系汇集了数据收集权、数据处理权和数据侦查权等,需要针对不同类型的数据警察权设计相应实体法与程序法运行机制。数据警察权需要通过组织化设计进行纵向与横向路径的配置,实现数据警察权的组织化、规范化与制度化运行。 展开更多
关键词 数据警察权 配置 制度化
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Guaranteed feasible control allocation using model predictive control
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作者 Mehdi NADERI Ali KHAKI SEDIGH Tor Arne JOHANSEN 《控制理论与技术:英文版》 EI CSCD 2019年第3期252-264,共13页
This paper proposes a guaranteed feasible control allocation method based on the model predictive control. Feasible region is considered to guarantee the determination of the desired virtual control signal using the p... This paper proposes a guaranteed feasible control allocation method based on the model predictive control. Feasible region is considered to guarantee the determination of the desired virtual control signal using the pseudo inverse methodology and is described as a set of constraints of an MPC problem. With linear models and the given constraints, feasible region defines a convex polyhedral in the virtual control space. In order to reduce the computational time, the polyhedral can be approximated by a few axis alig ned hypercubes. Employing the MPC with rectangular constraints substantially reduces the computational complexity .In two dimensions, the feasible region can be approximated by a few rectangles of the maximum area using numerical geometry techniques which are considered as the constraints of the MPC problem. Also, an active MPC is defined as the controller to minimize the cost function in the control horizon. Finally, several simulation examples are employed to illustrate the effectiveness of the proposed techniques. 展开更多
关键词 CONTROL ALLOCATION feasible REGION ACTUATOR CONSTRAINTS model PREDICTIVE CONTROL
不确定环境下建筑废弃物设施选址的多目标鲁棒优化问题 预览
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作者 许妙 袁红平 《工业工程》 北大核心 2019年第5期82-93,共12页
如何在充分考虑外部环境不确定性(比如:废弃物产生量、资源化率、成本等)下综合控制成本、GHG排放与视觉污染等的最小化是实现建筑废弃物设施合理选址及废弃物分配的关键。首先引入传统确定性模型,在经济、环境、社会各视角下同时最小... 如何在充分考虑外部环境不确定性(比如:废弃物产生量、资源化率、成本等)下综合控制成本、GHG排放与视觉污染等的最小化是实现建筑废弃物设施合理选址及废弃物分配的关键。首先引入传统确定性模型,在经济、环境、社会各视角下同时最小化成本、GHG排放以及视觉污染;然后考虑各不确定性参数在一有界闭空间内变化,构建了鲁棒相对模型;最后以北京市为算例确定最优的废弃物设施选址与分配。结果表明,随着参数不确定性水平的增大,总目标函数值呈逐步上升趋势;相较于确定性模型,构建的鲁棒模型所获得的解更加稳定,证明了鲁棒模型的有效性。 展开更多
关键词 建筑废弃物 废弃物设施 鲁棒优化 选址 分配
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AI for 5G:research directions and paradigms
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作者 Xiaohu YOU Chuan ZHANG +2 位作者 Xiaosi TAN Shi JIN Hequan WU 《中国科学:信息科学(英文版)》 SCIE EI CSCD 2019年第2期1-13,共13页
Wireless communication technologies such as fifth generation mobile networks(5 G)will not only provide an increase of 1000 times in Internet traffic in the next decade but will also offer the underlying technologies t... Wireless communication technologies such as fifth generation mobile networks(5 G)will not only provide an increase of 1000 times in Internet traffic in the next decade but will also offer the underlying technologies to entire industries to support Internet of things(IOT)technologies.Compared to existing mobile communication techniques,5 G has more varied applications and its corresponding system design is more complicated.The resurgence of artificial intelligence(AI)techniques offers an alternative option that is possibly superior to traditional ideas and performance.Typical and potential research directions related to the promising contributions that can be achieved through AI must be identified,evaluated,and investigated.To this end,this study provides an overview that first combs through several promising research directions in AI for 5 G technologies based on an understanding of the key technologies in 5 G.In addition,the study focuses on providing design paradigms including 5 G network optimization,optimal resource allocation,5 G physical layer unified acceleration,end-to-end physical layer joint optimization,and so on. 展开更多
关键词 5G mobile communication AI techniques network OPTIMIZATION resource ALLOCATION UNIFIED ACCELERATION END-TO-END joint OPTIMIZATION
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