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Data-based neural controls for an unknown continuous-time multi-input system with integral reinforcement 认领 引用
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作者 Yongfeng Lv Jun Zhao +1 位作者 Wan Zhang Huimin Chang 《Control Theory and Technology》 EI CSCD 2025年第1期118-130,共13页
Integral reinforcement learning(IRL)is an effective tool for solving optimal control problems of nonlinear systems,and it has been widely utilized in optimal controller design for solving discrete-time nonlinearity.Ho... Integral reinforcement learning(IRL)is an effective tool for solving optimal control problems of nonlinear systems,and it has been widely utilized in optimal controller design for solving discrete-time nonlinearity.However,solving the Hamilton-Jacobi-Bellman(HJB)equations for nonlinear systems requires precise and complicated dynamics.Moreover,the research and application of IRL in continuous-time(CT)systems must be further improved.To develop the IRL of a CT nonlinear system,a data-based adaptive neural dynamic programming(ANDP)method is proposed to investigate the optimal control problem of uncertain CT multi-input systems such that the knowledge of the dynamics in the HJB equation is unnecessary.First,the multi-input model is approximated using a neural network(NN),which can be utilized to design an integral reinforcement signal.Subsequently,two criterion networks and one action network are constructed based on the integral reinforcement signal.A nonzero-sum Nash equilibrium can be reached by learning the optimal strategies of the multi-input model.In this scheme,the NN weights are constantly updated using an adaptive algorithm.The weight convergence and the system stability are analyzed in detail.The optimal control problem of a multi-input nonlinear CT system is effectively solved using the ANDP scheme,and the results are verified by a simulation study. 展开更多
关键词 Adaptive dynamic programming Integral reinforcement Neural networks Heuristic dynamic programming Multi-input system
Matrix Power Control Algorithm for Multi-input Multi-output Random Vibration Test 认领 引用 被引量：13
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作者 CUI Xuli CHEN Huaihai +1 位作者 HE Xudong JIANG Shuangyan 《Chinese Journal of Aeronautics》 SCIE EI CAS CSCD 2011年第6期741-748,共8页
Both auto-power spectrum and cross-power spectrum need to be controlled in multi-input multi-output(MIMO)random vibration test.During the control process with the difference control algorithm(DCA),a lower triangular m... Both auto-power spectrum and cross-power spectrum need to be controlled in multi-input multi-output(MIMO)random vibration test.During the control process with the difference control algorithm(DCA),a lower triangular matrix is derived from Cholesky decomposition of a reference spectrum matrix.The diagonal elements of the lower triangular matrix(DELTM)may become negative.These negative values have no meaning in physical significance and can cause divergence of auto-power spectrum control.A proportional root mean square control algorithm(PRMSCA)provides another method to avoid the divergence caused by negative values of DELTM,but PRMSCA cannot control the cross-power spectrum.A new control algorithm named matrix power control algorithm(MPCA)is proposed in the paper.MPCA can guarantee that DELTM is always positive in the auto-power spectrum control.MPCA can also control the cross-power spectrum.After these three control algorithms are analyzed,three-input three-output random vibration control tests are implemented on a three-axis vibration shaker.The results show the validity of the proposed MPCA. 展开更多
关键词 multi-input multi-output environmental testing vibration control random vibration auto-power spectrum cross-power spectrum
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Control method for multi-input multi-output non-Gaussian random vibration test with cross spectra consideration 认领 引用 被引量：12
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作者 Ronghui ZHENG Huaihai CHEN Xudong HE 《Chinese Journal of Aeronautics》 SCIE EI CAS CSCD 2017年第6期1895-1906,共12页
A control method for Multi-Input Multi-Output（MIMO） non-Gaussian random vibration test with cross spectra consideration is proposed in the paper. The aim of the proposed control method is to replicate the specified ... A control method for Multi-Input Multi-Output（MIMO） non-Gaussian random vibration test with cross spectra consideration is proposed in the paper. The aim of the proposed control method is to replicate the specified references composed of auto spectral densities, cross spectral densities and kurtoses on the test article in the laboratory. It is found that the cross spectral densities will bring intractable coupling problems and induce difficulty for the control of the multioutput kurtoses. Hence, a sequential phase modification method is put forward to solve the coupling problems in multi-input multi-output non-Gaussian random vibration test. To achieve the specified responses, an improved zero memory nonlinear transformation is utilized first to modify the Fourier phases of the signals with sequential phase modification method to obtain one frame reference response signals which satisfy the reference spectra and reference kurtoses. Then, an inverse system method is used in frequency domain to obtain the continuous stationary drive signals. At the same time, the matrix power control algorithm is utilized to control the spectra and kurtoses of the response signals further. At the end of the paper, a simulation example with a cantilever beam and a vibration shaker test are implemented and the results support the proposed method very well. 展开更多
关键词 Cross spectra Kurtosis control Multi-input multi-output Non-Gaussian Random vibration test
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Multi-input multi-output random vibration control using Tikhonov filter 认领 引用 被引量：4
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作者 Cui Song Chen Huaihai +1 位作者 He Xudong Zheng Wei 《Chinese Journal of Aeronautics》 SCIE EI CAS CSCD 2016年第6期1649-1663,共15页
Noises always disturb the control effect of an environment test especially in multi-input multi-output(MIMO) systems. If the frequency response function matrices are ill-conditioned, the noises in the driving forces w... Noises always disturb the control effect of an environment test especially in multi-input multi-output(MIMO) systems. If the frequency response function matrices are ill-conditioned, the noises in the driving forces will be amplified and the response spectral lines may awfully exceed their tolerances. Most of the major biases between the response spectra and the reference spectra are produced by the amplified noises. However, ordinary control algorithms can hardly reduce the level of noises. The influences of the noises on both the auto- and cross-power spectra are analyzed in this paper. As a conventional frequency domain method on the inverse problem, the Tikhonov filter is adopted in the environment test to suppress the exceeding spectral lines. By altering regularization parameters gradually, the auto-power spectra can be improved in a closed control loop. Instead of using the traditional way of selecting regularization parameters, we observe the coherence change to estimate noise eliminations. Incidentally, the requirement of coherence control can be realized. The errors of the phase are then studied and a phase control algorithm is introduced at the end as a supplement of cross-power spectra control. The Tikhonov filter and the proposed phase control algorithm are tested numerically and experimentally. The results show that the noises in the vicinity of lightly damped resonant peaks are more stubborn. The response spectra are able to be greatly improved by the combination of these two methods. 展开更多
关键词 Coherence Environmental testing Multi-input multi-output(MIMO) Noise Phase control Tikhonov filter
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Set-point-related Indirect Iterative Learning Control for Multi-input Multi-output Systems 认领 引用 被引量：1
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作者 Huo, Zhen-Yu Yang, Zhu Pang, Yan-Jun 《International Journal of Automation and computing》 2012年第3期266-273,共8页
A form of iterative learning control (ILC) is used to update the set-point for the local controller. It is referred to as set-point-related (SPR) indirect ILC. SPR indirect ILC has shown excellent performance: as a su... A form of iterative learning control (ILC) is used to update the set-point for the local controller. It is referred to as set-point-related (SPR) indirect ILC. SPR indirect ILC has shown excellent performance: as a supervision module for the local controller, ILC can improve the tracking performance of the closed-loop system along the batch direction. In this study, an ILC-based P-type controller is proposed for multi-input multi-output (MIMO) linear batch processes, where a P-type controller is used to design the control signal directly and an ILC module is used to update the set-point for the P-type controller. Under the proposed ILC-based P-type controller, the closed-loop system can be transformed to a 2-dimensional (2D) Roesser s system. Based on the 2D system framework, a sufficient condition for asymptotic stability of the closed-loop system is derived in this paper. In terms of the average tracking error (ATE), the closed-loop control performance under the proposed algorithm can be improved from batch to batch, even though there are repetitive disturbances. A numerical example is used to validate the proposed results. 展开更多
关键词 Iterative learning control (ILC) indirect ILC multi-input multi-output (MIMO) 2-dimensional system asymptotical stability linear matrix inequality (LMI).
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Design of Decentralized Multi-input Multi-output Repetitive Control Systems 认领 引用
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作者 Edi Kurniawan Zhen-Wei Cao +1 位作者 Maria Mitrevska Zhi-Hong Man 《International Journal of Automation and computing》 CSCD 2016年第6期615-623,共9页
This paper presents the design of decentralized repetitive control （RC） for multi-input multi-output （MIMO） systems. An optimization method is used to obtain a RC compensator that ensures system stability and good... This paper presents the design of decentralized repetitive control （RC） for multi-input multi-output （MIMO） systems. An optimization method is used to obtain a RC compensator that ensures system stability and good tracking performance. The designed compensator is in the form of a stable, low order, and causal filter, in which the compensator can be implemented separately without being merged with the RC internal model. This will reduce complexity in the implementation. Simulation results and comparison study are given to demonstrate the effectiveness of the proposed design. The novelty of design is also verified in experiments on a 2 degrees of freedom （DOF） robot. 展开更多
关键词 Repetitive control （RC） compensator multi-input multi-output （MIMO） decentralized optimization two degrees of freedom robot.
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APPLICATION OF FRF ESTIMATOR BASED ON ERRORS-IN-VARIABLES MODEL IN MULTI-INPUT MULTI-OUTPUT VIBRATION CONTROL SYSTEM 认领 引用
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作者 GUAN Guangfeng CONG Dacheng +1 位作者 HAN Junwei LI Hongren 《Chinese Journal of Mechanical Engineering》 EI CAS 2007年第4期101-105,共5页
The FRF estimator based on the errors-in-variables(EV)model of multi-input multi-output(MIMO)system is presented to reduce the bias error of FRF HI estimator.The FRF HI estimator is influenced by the noises in the inp... The FRF estimator based on the errors-in-variables(EV)model of multi-input multi-output(MIMO)system is presented to reduce the bias error of FRF HI estimator.The FRF HI estimator is influenced by the noises in the inputs of the system and generates an under-estimation of the true FRF.The FRF estimator based on the EV model takes into account the errors in both the inputs and outputs of the system and would lead to more accurate FRF estimation.The FRF estimator based on the EV model is applied to the waveform replication on the 6-DOF(degree-of-freedom)hydraulic vibration table.The result shows that it is favorable to improve the control precision of the MIMO vibration control system. 展开更多
关键词 Multi-input multi-output(MIMO)system Errors-in-variables(EV)model 6-DOF hydraulic vibration table Waveform replication
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A multi-input and multi-output design on automotive engine management system 认领 引用
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作者 翟禹嘉 孙研 +1 位作者 钱科军 LEE Sang-hyuk 《Journal of Central South University》 SCIE EI CAS CSCD 2015年第12期4687-4692,共6页
Lookup table is widely used in automotive industry for the design of engine control units(ECU).Together with a proportional-integral controller,a feed-forward and feedback control scheme is often adopted for automotiv... Lookup table is widely used in automotive industry for the design of engine control units(ECU).Together with a proportional-integral controller,a feed-forward and feedback control scheme is often adopted for automotive engine management system(EMS).Usually,an ECU has a structure of multi-input and single-output(MISO).Therefore,if there are multiple objectives proposed in EMS,there would be corresponding numbers of ECUs that need to be designed.In this situation,huge efforts and time were spent on calibration.In this work,a multi-input and multi-out(MIMO) approach based on model predictive control(MPC) was presented for the automatic cruise system of automotive engine.The results show that the tracking of engine speed command and the regulation of air/fuel ratio(AFR) can be achieved simultaneously under the new scheme.The mean absolute error(MAE) for engine speed control is 0.037,and the MAE for air fuel ratio is 0.069. 展开更多
关键词 neural network spark-ignition engine dynamical system modeling system identification multi-input and mult-output(MIMO) control system
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Integrated Multi-input Bi-directional DC-DC Converter for Hybrid Energy Storage Systems 认领 引用
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作者 Jun Cai Xu Peng +1 位作者 Xin Zhang Zhiquan Deng 《CSEE Journal of Power and Energy Systems》 SCIE EI CSCD 2026年第2期1015-1028,共14页
Multi-input bidirectional DC-DC converter is quite vital for a single system to interface multiple sources and allow energy exchange between sources and loads.In this paper,a general multi-input DC-DC converter topolo... Multi-input bidirectional DC-DC converter is quite vital for a single system to interface multiple sources and allow energy exchange between sources and loads.In this paper,a general multi-input DC-DC converter topology and its control strategy are proposed for hybrid energy storage system.This converter can connect any number of power sources and make any ports controllable bidirectionally.To interface N power sources,only N+1 controllable power switches are needed,which makes converter more compact with largely reduced power devices and driving circuits.Without loss of generality,a case with two sources(N=2)is utilized as a typical study case for experimental verification.Experimental results show this converter can interface two individual power sources simultaneously and ensure flexible power flow control with all ports bi-directionally.N=2 converter structure can be developed as an integrated converter module,which is able to combine with traditional bidirectional buck/boost DC-DC converter(BBDC)to construct series-connected or parallel connected integrated converters for multi-source applications. 展开更多
关键词 Bidirectional DC-DC converter hybrid energy storage integration multi-input
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中国城市贸易隐含碳与增加值转移及不公平性——基于增加值贸易视角 认领 引用 被引量：1
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作者 张雪莹 周晓艳 +2 位作者 程必立 杨崴 万丽娟 《地理科学》 CSSCI CSCD 北大核心 2026年第3期645-657,共13页
明晰城市隐含碳与增加值转移及其不公平性对推动城市低碳转型和区域协调发展具有重要意义。运用2012年和2017年最新可获取的中国城市多区域投入产出表(MRIO),从增加值贸易视角核算城市生产端与消费端碳排放和增加值,分析传统、简单和复... 明晰城市隐含碳与增加值转移及其不公平性对推动城市低碳转型和区域协调发展具有重要意义。运用2012年和2017年最新可获取的中国城市多区域投入产出表(MRIO),从增加值贸易视角核算城市生产端与消费端碳排放和增加值,分析传统、简单和复杂3条价值链上城市隐含碳与增加值转移的空间格局、行业结构及不公平性。研究发现:(1)城市隐含碳转移总量约占生产端排放的80%,其中复杂价值链上占总体的1/2以上成为主导,且隐含碳主要从北部资源型和工业型城市向全国和区域中心城市跨省净流出;相比之下,传统价值链和简单价值链上,省内城市隐含碳净转移比重更高,表现为资源型和工业型城市之间及它们向省会城市的净转移。(2)传统价值链上,沿海城市因高附加值服务业产品净输出成为增加值净流入高值区,西北、东北和中部地区城市净流出增加值。简单价值链和复杂价值链上,主要受中心城市对建筑业和服务业的最终需求拉动,大量资源型和工业型城市通过供给重制造业、采矿业和电力热力、燃气及水生产供应业的高碳基础行业中间品,获得增加值净流入。(3)隐含碳与增加值转移不公平性呈现价值链分异。传统价值链上,北部较多城市面临“碳流出-增加值流出”的双重损失且呈加剧趋势。简单价值链和复杂价值链上,多数隐含碳净流出城市虽获得增加值,但存在“高碳低收”的交换。榆林、鄂尔多斯、唐山和银川在3条价值链上均面临较高的不公平性。 展开更多
关键词 增加值贸易 隐含碳转移 多区域投入产出模型(MRIO) 中国
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Dynamic Modeling and Closed-loop Control of Hybrid Grid-connected Renewable Energy System with Multi-input Multi-output Controller 认领 引用 被引量：4
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作者 Mahdi Salimi Fereshteh Radmand Mansour Hosseini Firouz 《Journal of Modern Power Systems and Clean Energy》 SCIE EI CSCD 2021年第1期94-103,共10页
In this study, a novel approach for dynamic modeling and closed-loop control of hybrid grid-connected renewable energy system with multi-input multi-output(MIMO) controller is proposed. The studied converter includes ... In this study, a novel approach for dynamic modeling and closed-loop control of hybrid grid-connected renewable energy system with multi-input multi-output(MIMO) controller is proposed. The studied converter includes two parallel DC-DC boost converters, which are connected into the power grid through a single-phase H-bridge inverter. The proposed MIMO controller is developed for maximum power point tracking of photovoltaic(PV)/fuel-cell(FC) input power sources and output power control of the grid-connected DC-AC inverter. Considering circuit topology of the system, a unique MIMO model is proposed for the analysis of the entire system. A unique model of the system includes all of the circuit state variables in DCDC and DC-AC converters. In fact, from the viewpoint of closed-loop controller design, the hybrid grid-connected energy system is an MIMO system. The control inputs of the system are duty cycles of the DC-DC boost converters and the amplitude modulation index of DC-AC inverters. Furthermore, the control outputs are the output power of the PV/FC input power sources as well as AC power injected into the power grid. After the development of the unique model for the entire system, a decoupling network is introduced for system input-output linearization due to inherent connection of the control outputs with all of the system inputs. Considering the decoupled model and small signal linearization, the required linear controllers are designed to adjust the outputs. Finally, to evaluate the accuracy and effectiveness of the designed controllers, the PV/FC based grid-connected system is simulated using the MATLAB/Simulink toolbox. 展开更多
关键词 Multi-input multi-output(MIMO)converter maximum power point tracking grid-connected inverter conversion function matrix
“一带一路”沿线经济体贸易隐含碳网络及其动态演化机制 认领 引用 被引量：1
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作者 罗明 郑锐豪 范如国 《生态经济》 北大核心 2026年第2期108-115,共8页
利用多区域投入产出模型对“一带一路”沿线经济体贸易隐含碳进行测度,并构建贸易隐含碳网络,采用时间指数随机图模型探究空间关联特征及内生演化机制。研究表明:(1)网络结构稳定,呈现出“小世界”和“中心—边缘”特征。(2)贸易隐含碳... 利用多区域投入产出模型对“一带一路”沿线经济体贸易隐含碳进行测度,并构建贸易隐含碳网络,采用时间指数随机图模型探究空间关联特征及内生演化机制。研究表明:(1)网络结构稳定,呈现出“小世界”和“中心—边缘”特征。(2)贸易隐含碳规模不断增大,交流日益频繁。互惠性主要存在于发达经济体板块内部;发达经济体和落后经济体之间的对称可达性较弱,存在不平等的碳排放关系。(3)网络形成和演化存在结构依赖和时间依赖效应。其中,聚敛性、多连通性、三元传递闭合性和路径依赖效应明显;发送者的出口污染密度以及接收者的经济发展水平与贸易隐含碳关系的形成概率呈正相关关系,而接收者的环境监管力度与贸易隐含碳关系的形成概率呈负相关关系;贸易隐含碳关系随着不断深化的中间品贸易而增强。 展开更多
关键词 多区域投入产出模型 贸易隐含碳网络 时间指数随机图模型 内生演化机制
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ROBUST STABILIZATION FOR MULTI-INPUT POLYTOPIC NONLINEAR SYSTEMS 认领 引用 被引量：5
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作者 Lipo MO 《Journal of Systems Science & Complexity》 SCIE EI CSCD 2011年第1期93-104,共12页
This paper deals with the problem of the stabilization for multi-input polytopic nonlinear systems. Based on the robust control Lyapunov function, a sufficient condition for the existence of time-invariant, continuous... This paper deals with the problem of the stabilization for multi-input polytopic nonlinear systems. Based on the robust control Lyapunov function, a sufficient condition for the existence of time-invariant, continuous, asymptotically stabilizing state feedback controller is derived. It is shown that the obtained sufficient condition is also necessary if there exists a state feedback controller such that the closed-loop system has a robust Lyapunov function for all possible uncertainties. Moreover, a universal formula for constructing stabilizing controller is proposed and the existence of the corresponding Lyapunov function is proven. Particularly, a Lyapunov function is constructed for the polytopic nonlinear system in canonical form. Finally, the feasibility of the proposed control law is verified by a numerical example. 展开更多
关键词 Existence of Lyapunov function multi-input nonlinear systems polytopic systems robust stabilization.
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地下水预冷新风的地源热泵空调系统动态特性研究 认领 引用
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作者 王林 龙滨 +3 位作者 李修真 谈莹莹 冯森 陈森 《工程热物理学报》 EI CAS CSCD 北大核心 2026年第7期2209-2219,共11页
地下水预处理新风的地源热泵空调系统节能效果显著,但因负荷波动和多输入多输出特性使得系统动态响应特性预测精度偏低。为此,基于实验验证建立地下水预处理新风的地源热泵空调系统状态空间模型,评估了地下水温度、地下水流量及新风温... 地下水预处理新风的地源热泵空调系统节能效果显著,但因负荷波动和多输入多输出特性使得系统动态响应特性预测精度偏低。为此,基于实验验证建立地下水预处理新风的地源热泵空调系统状态空间模型,评估了地下水温度、地下水流量及新风温度扰动对系统动态性能的影响。结果表明:地下水温度、地下水流量及新风温度等关键参数扰动对系统动态性能有显著影响,且导致热泵机组COPτ增幅呈线性变化;地下水温度扰量递增1~5°C,热泵机组COPτ增幅最终维持在-0.048~-0.24,响应时间为130 s;地下水流量扰量递增0.01~0.1 kg/s,热泵机组COPτ增幅维持在0.047~0.47,响应时间为110 s;新风温度扰量递增1~5°C,热泵机组COPτ增幅维持在-0.047~-0.215,响应时间为225 s。研究结果可为新系统高效运行调控提供理论指导。 展开更多
关键词 地源热泵 状态空间方法 多输入多输出 动态性能 性能系数 响应时间
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一种具备双极电压自均衡能力的多输入变换器 认领 引用
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作者 邾玢鑫 廖文心 +2 位作者 杨浴金 覃团发 郑含博 《电机与控制学报》 EI CSCD 北大核心 2026年第5期62-73,共12页
在分布式新能源大规模接入和电力系统转型升级的双重推动下,双极直流微电网具有重要的应用价值。针对目前双极直流微电网中存在的极间电压不平衡问题,提出一种具备双极极间输出电压自均衡能力的多输入变换器。该变换器在正、负极负载不... 在分布式新能源大规模接入和电力系统转型升级的双重推动下,双极直流微电网具有重要的应用价值。针对目前双极直流微电网中存在的极间电压不平衡问题,提出一种具备双极极间输出电压自均衡能力的多输入变换器。该变换器在正、负极负载不平衡的情况下也具有良好的电压自均衡能力,无需额外的复杂电压平衡控制算法。此外,该变换器还具备开关器件应力低、控制方式简单、结构可灵活拓展等优点。首先,介绍了所提变换器的推演过程;其次,对其工作模态、电压增益和器件应力进行具体分析;然后,详细阐述了该变换器输出电压自均衡的原理,并对其作定量计算;最后,搭建一台额定功率1 kW的实验样机,验证该变换器具备良好的电压自均衡特性,表明了理论分析的正确性和有效性。 展开更多
关键词 双极直流微电网 电压自均衡 多输入DC/DC变换器 非隔离 拓扑推演
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多输入逆变器拓扑结构与能量管理研究综述 认领 引用
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作者 曾汉超 郑向荣 +2 位作者 邱琰辉 张达敏 张强 《电源学报》 CSCD 北大核心 2026年第6期39-48,共10页
多输入逆变器可将多种新能源联合发出的直流电转换为电网所需的交流电,有效地克服了单一新能源供电带来的电力供应可靠性低、电能质量差、功率波动大等问题。结合国内外研究现状,按直流变换器类型和功率变换级数,将多输入逆变器的拓扑... 多输入逆变器可将多种新能源联合发出的直流电转换为电网所需的交流电,有效地克服了单一新能源供电带来的电力供应可靠性低、电能质量差、功率波动大等问题。结合国内外研究现状,按直流变换器类型和功率变换级数,将多输入逆变器的拓扑结构分成两级单输入直流变换器型逆变器、两级多输入直流变换器型逆变器和单级多输入逆变器3类。详细论述了各种多输入逆变器的优缺点及在不同应用场合下的能量管理;对比分析了不同拓扑结构多输入逆变器的电路复杂性、控制难易程度、成本和变换效率等,为该领域的进一步研究与发展提供了参考。 展开更多
关键词 多输入逆变器 功率变换级数 能量管理 新能源发电
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中国滑雪旅游业水—能足迹时空格局演化及经济脱钩效应 认领 引用
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作者 巩蓉蓉 夏冰 +4 位作者 史东辉 李泽红 李宇 杨雯 侯兆伟 《自然资源学报》 CSSCI CSCD 北大核心 2026年第7期2087-2115,共29页
滑雪旅游业对水资源、能源的依赖日益突出。基于环境拓展多区域投入产出模型与Tapio模型,揭示2015年、2019年、2023年中国滑雪旅游业的水—能足迹时空演化特征及经济脱钩效应。结果显示:(1)中国滑雪旅游业水—能足迹呈现先增后降趋势。... 滑雪旅游业对水资源、能源的依赖日益突出。基于环境拓展多区域投入产出模型与Tapio模型,揭示2015年、2019年、2023年中国滑雪旅游业的水—能足迹时空演化特征及经济脱钩效应。结果显示:(1)中国滑雪旅游业水—能足迹呈现先增后降趋势。水足迹为西北—东北—华北密集、南方低但增长快的空间格局,能源足迹表现为目的地梯度扩张、客源地集聚消耗的特征。(2)在部门关联层面,水足迹呈现上游部门密集、核心部门分化、外衍部门渗透的结构特点,能源足迹由上游与核心部门主导。(3)资源供给和需求的空间错位明显,水—能足迹形成华东地区输出、西北地区承载的空间流动格局。(4)水足迹以强脱钩主导、能源足迹以弱脱钩主导。滑雪旅游水—能足迹具有空间外溢性与产业传导性,需通过跨区域责任共担与产业链分级管控促进绿色转型。 展开更多
关键词 滑雪旅游 环境拓展多区域投入产出模型 水—能足迹 经济脱钩
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安全认知多发单收WPT-MEC网络能效最大化方案 认领 引用
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作者 刘伯阳 王佳伟 +3 位作者 张浩然 党儒鸽 王丽平 余飞 《西安邮电大学学报》 2026年第4期71-79,共9页
针对物联网(Internet of Things,IoT)移动边缘计算(Mobile Edge Computing,MEC)网络中终端设备电池容量有限、频谱资源稀缺及信息传输易被窃听等问题,提出一种基于认知无线电(Cognitive Radio,CR)与无线功率传输(Wireless Power Transfe... 针对物联网(Internet of Things,IoT)移动边缘计算(Mobile Edge Computing,MEC)网络中终端设备电池容量有限、频谱资源稀缺及信息传输易被窃听等问题,提出一种基于认知无线电(Cognitive Radio,CR)与无线功率传输(Wireless Power Transfer,WPT)技术辅助的安全多输入单输出(Multiple-Input Single-Output,MISO)MEC网络架构。通过融合CR、WPT、物理层安全与协作中继技术,构建以MISO-MEC网络终端能效最大化为目标的优化问题,并采用基于Dinkelbach算法、块坐标下降(Block Coordinate Descent,BCD)、拉格朗日对偶以及变量替换的两阶段联合优化方法进行求解,得到主发射机波束成形向量、次级基站波束成形矩阵、移动终端的发送功率及本地计算频率参数的最优解。仿真结果表明,所提方案在不同网络参数下均有效可靠,能够显著降低能耗并使网络能效最大化,同时验证了该方案理论能效为实际能效的下界。 展开更多
关键词 移动边缘计算 认知无线电 无线能量传输 多输入单输出 物理层安全
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虚拟水贸易对黄河流域城市群水稀缺的影响 认领 引用
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作者 陆中桂 李优然 +2 位作者 姜博艺 黄明辉 宋南奇 《人民黄河》 CAS 北大核心 2026年第4期99-106,共8页
城市群已成为黄河流域经济社会发展的重要支撑点和增长极。研究核算了黄河流域5个国家级城市群总计71个城市的蓝水和灰水足迹,采用构建的城市尺度MRIO模型分析了2017年城市群间和城市群内部虚拟水贸易及其对水资源短缺的影响。结果表明:... 城市群已成为黄河流域经济社会发展的重要支撑点和增长极。研究核算了黄河流域5个国家级城市群总计71个城市的蓝水和灰水足迹,采用构建的城市尺度MRIO模型分析了2017年城市群间和城市群内部虚拟水贸易及其对水资源短缺的影响。结果表明:1)5个城市群的蓝水和灰水足迹总量分别为446.8亿m3和3102.8亿m3,其中中原和山东半岛城市群合计分别占57.0%和71.2%。2)城市间虚拟蓝水和灰水转移量分别为245.7亿m3和771.3亿m3,其中城市群内部转移占主导,占比分别为76.6%和81.9%;城市群间的转移则相对较少,仅占23.4%和18.1%,其中中原和山东半岛城市群是虚拟水的主要输出区域。3)虚拟水转移对不同城市水稀缺的影响存在显著差异。虚拟水贸易虽然在一定程度上缓解了经济发达城市的缺水压力,但是却加剧了欠发达和以农业为主的城市的水稀缺问题。建议以节水增效为目标,优化产业和贸易结构,进一步减缓城市群地区与贸易关联的水稀缺风险,推动水资源管理和可持续利用。 展开更多
关键词 城市群 水足迹 虚拟水 多区域投入产出模型 黄河流域
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供产消共担视角下中国农业能源消费碳排放测度 认领 引用
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作者 李梦 王雅楠 +2 位作者 赵敏娟 陈伟 刘增明 《资源科学》 CSSCI CSCD 北大核心 2026年第3期706-724,共19页
【目的】旨在构建一个涵盖生产、消费与收入责任视角的农业能源消费碳排放责任核算框架,提出能够充分反映农业生产链上下游关系的碳排放责任分配方案,为制定公平有效的农业碳减排政策提供依据。【方法】利用环境拓展多区域投入产出模型... 【目的】旨在构建一个涵盖生产、消费与收入责任视角的农业能源消费碳排放责任核算框架,提出能够充分反映农业生产链上下游关系的碳排放责任分配方案,为制定公平有效的农业碳减排政策提供依据。【方法】利用环境拓展多区域投入产出模型,从生产、消费和收入3种责任视角,测度2017年中国30个省份农业能源消费产生的碳排放,并引入共享张量修正Leontief模型和Ghosh模型,测度责任共担原则下农业能源消费碳排放责任。【结果】(1)基于“生产者责任”的碳排放总量高于“消费者责任”碳排放总量,而“收入者责任”的碳排放最低。(2)与综合原则相比,“收入加权责任”原则和“消费加权责任”原则均难以实现合理的碳排放责任分配。(3)在综合原则下,粮食主产区碳排放责任为6922.37万t,较“收入加权责任”原则和“消费加权责任”原则分别下降22.04%和23.14%。粮食主销区碳排放责任为1964.00万t,较“收入加权责任”原则和“消费加权责任”原则分别上升4.34%和17.53%。【结论】农业能源消费碳排放责任分配应统筹考虑产业链上下游影响,构建基于综合原则的分配机制。建议制定并完善农业碳减排相关政策,明确各责任主体的减排目标和责任,推动跨区域农业合作与技术交流,共同推进农业碳减排进程。 展开更多
关键词 能源消费 碳排放责任分配 隐含碳排放 环境拓展多区域投入产出模型 中国
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