A coordinated operation method of wind-PV-hydrogenstorage multi-agent energy system

Wind-photovoltaic(PV)-hydrogen-storage multi-agent energy systems are expected to play an important role in promoting renewable power utilization and decarbonization.In this study,a coordinated operation method was proposed for a wind-PVhydrogen-storage multi-agent energy system.First,a coordinated operation model was formulated for each agent considering peer-to-peer power trading.Second,a coordinated operation interactive framework for a multi-agent energy system was proposed based on the theory of the alternating direction method of multipliers.Third,a distributed interactive algorithm was proposed to protect the privacy of each agent and solve coordinated operation strategies.Finally,the effectiveness of the proposed coordinated operation method was tested on multi-agent energy systems with different structures,and the operational revenues of the wind power,PV,hydrogen,and energy storage agents of the proposed coordinated operation model were improved by approximately 59.19%,233.28%,16.75%,and 145.56%,respectively,compared with the independent operation model.

Operating Room Nurses’ Role in Multidisciplinary Surgical Coordination for a Patient with a Large Abdominal Tumor and Multiple Pelvic Fractures

In this study,we have summarized the coordination of operating room nurses participating in the multidisciplinary team in diagnosing and treating a patient with a large abdominal tumor and multiple pelvic fractures.To perform surgical treatment on patients with various conditions,it is crucial to consider the patients from a holistic perspective.Thus,the existing medical model has shifted from a“disease-centered”approach focusing on single-disciplinary diagnosis and treatment,to a“patient-centered”approach that involves multiple disciplines in diagnosis and therapy.Operating room nurses,as crucial collaborators of surgeons,should make necessary adjustments to enhance their comprehension of patients,improving the overall quality of surgical coordination.

Analysis of good practice of Public Health Emergency Operations Centers

Objective: To study the public health Emergency Operations Centers(EOCs)in the US, the European Union, the UK and Australia, and summarize the good practice for the improvement of National Health Emergency Response Command Center in Chinese National Health and Family Planning Commission. Methods: Literature review was conducted to explore the EOCs of selected countries. Results: The study focused on EOC function, organizational structure, human resources and information management. The selected EOCs had the basic EOC functions of coordinating and commanding as well as the public health related functions such as monitoring the situation, risk assessment, and epidemiological briefings. The organizational structures of the EOCs were standardized, scalable and flexible. Incident Command System was the widely applied organizational structure with a strong preference. The EOCs were managed by a unit of emergency management during routine time and surge staff were engaged upon emergencies. The selected EOCs had clear information management framework including information collection, assessment and dissemination. Conclusions: The performance of National Health Emergency Response Command Center can be improved by learning from the good practice of the selected EOCs, including setting clear functions, standardizing the organizational structure, enhancing the human resource capacity and strengthening information management.

Inter-Operator Interference Coordination for CoPrimary Spectrum Sharing in UDN

Co-primary spectrum sharing for multiple operators has been utilized to fully explore the spectrum resources and thus improve the spectrum efficiency. The inter-operator interference(IOI) problem should be seriously considered in order to achieve the mentioned target, especially under the scenario of the ultradense network(UDN) in the fifth generation(5G) wireless systems. To solve this problem, we propose an asymmetrical power levels based soft IOI coordination mechanism. The shared spectrum pool is consisted of three separated parts, where each part can be dynamically adjusted according to the minimal spectrum demand from each operator. Furthermore, different power masks are configured to different parts for each operator. The simulation results show that the proposed mechanism can improve the network spectrum efficiency significantly.

Applying invariant eigen-operator method to deriving normal coordinates of general classical Hamiltonian

For classical Hamiltonian with general form H = 1/2∑ijMijpipj＋1/2∑ijLijqiqj we find a new convenient way to obtain its normal coordinates, namely, let H be quantised and then employ the invariant eigen-operator （IEO） method （Fan et al. 2004 Phys. Lett. A 321 75） to derive them. The general matrix equation, which relies on M and L, for obtaining the normal coordinates of H is derived.

Adaptive neural network control for coordinated motion of a dual-arm space robot system with uncertain parameters

Control of coordinated motion between the base attitude and the arm joints of a free-floating dual-arm space robot with uncertain parameters is discussed. By combining the relation of system linear momentum conversation with the Lagrangian approach, the dynamic equation of a robot is established. Based on the above results, the free-floating dual-arm space robot system is modeled with RBF neural networks, the GL matrix and its product operator. With all uncertain inertial system parameters, an adaptive RBF neural network control scheme is developed for coordinated motion between the base attitude and the arm joints. The proposed scheme does not need linear parameterization of the dynamic equation of the system and any accurate prior-knowledge of the actual inertial parameters. Also it does not need to train the neural network offline so that it would present real-time and online applications. A planar free-floating dual-arm space robot is simulated to show feasibility of the proposed scheme.

Multiple Dispatching Reactive Power and Voltage Coordinated Control Method

This paper studies the reactive power and voltage coordinated control scheme. According to the characteristics of Hunan power grid, the coordinated schemes about Hunan power grid with Central China Power Grid, as well as Changsha power grid are proposed. At the same time, this paper builds a two-way interactive and multiple dispatching reactive power and voltage coordinated control mode, and can be successfully applied in Hunan power grid. The operation results show that this control scheme fulfills the ability of large power grids in optimal allocating of resources, effectively integrates the reactive power resources of the entire grid, achieves the purpose of reducing power grid loss, improving voltage quality, reducing the operating numbers of the reactive power equipment.

Normally Ordered Expansion of the Even-Power of the Radial Coordinate Operator

By virtue of the technique of integration within an ordered product of operators we derive the concise normally ordered expansion of the even-power of the radial coordinate operator via the equation r = f d^(3)x |x〉〈x| r, where |x〉 is the three-dimensional coordinate eigenvector, and r = (x^(2 )+ y^(2) + z^(2))^(1/2). The application to perturbation theory is briefly discussed.

Coordinated Loading System

The coordinated loading system is a modern, key piece of equipment for conducting high-intensity tests. Aircraft and rockets operate under high-speed pneumatic power. To ensure the structural strength of aircraft and other flying vehicles to cope with the difficult environment under the extra load or speed, their component parts must undergo high-

基于最优经济运行区域的主动配电网日前日内协同调度方法

传统的日前-日内协同调度通常以与日前时序计划曲线偏差最小作为日内目标函数,当日内新能源出力预测值与日前相差较大时,储能装置(energy storage systems,ESS)等由于其时间耦合约束日内调整范围有限,导致经济性和灵活性较差。对此,提出了基于最优经济运行区域(optimal economic operation region,OEOR)的主动配电网(active distribution networks,ADN)日前-日内协同调度方法。在日前阶段,构建线性化ADN调度模型,基于拉丁超立方采样法生成的大量随机场景下调控设备优化曲线,以全时间段内设备出力上下界内所包含的随机场景优化结果数量最大为目标,考虑储能装置荷电状态的相邻时段约束和微型燃气轮机的爬/滑坡率,构建OEOR生成模型。最后,在日内阶段,调控设备在OEOR内滚动优化调整,当该时段优化值贴近OEOR边界时,考虑相邻时段出力约束,将OEOR扩展为最优经济极限运行区域(E-OEOR)。算例结果表明,所提方法相比于传统方法能够更有效地提升配电网经济性。

基于凸包算法的极端运行方式提取方法

在电力系统规划与运行的安全稳定计算中,一般选择对安全稳定最不利的运行方式进行校验,但随着新能源渗透率的增加,电网越发复杂多变,人工选择场景主观性较强,针对此问题,提出了一种基于快速凸包算法的极端运行方式提取,从而满足场景选取进行安全校核需求。从电源规划、发输电协调规划两个角度,考虑发电充裕性、火电爬坡需求、网络传输安全3个方面,分析影响规划的极端运行方式;基于凸包算法分别从上述3个方面构建坐标系进行极端运行方式提取;采用中国西北地区电网为算例进行极端运行方式提取,并与基于K-means算法的极端场景提取做对比,结果表明:所提方法能为场景选取提供有效数据支撑,满足电网规划要求。

考虑供需灵活性量化的源-荷-储多时间尺度协同优化

风电、光伏类新能源出力具有随机性和波动性,且随着新能源渗透率的增高,系统灵活性需求也激增。在此背景下,考虑源-荷-储灵活性资源互动,对新能源高渗透系统源-荷-储协同运行问题展开研究。首先,引入向上、向下裕度量化系统灵活性,并利用灵活性供需平衡机理动态评估灵活性需求;其次,提出一种考虑供需灵活性的多时间尺度协同运行方法,构建典型周、典型日、典型时段运行模拟模型,并将碳交易收益和灵活性不足惩罚成本纳入优化目标,考虑调峰需求和爬坡容量对典型时段灵活性的影响,采用多级优化、逐级细化的思路求解模型。算例分析表明,所提方法在保障系统环保性和经济性的基础上,提升了系统各个时间尺度上的灵活性容量,可以促进系统新能源消纳。

列车大小交路通信协同运行自适应控制方法

针对列车运输能力与客流时空分布不匹配的问题,提出列车灵活编组方案和短编组小间隔自适应控制方法。首先,根据新型列控系统的特点,设计列车自适应闭环控制框架,构建列车最小追踪间隔模型,提出大小交路列车在小交路通信协同运行的编组方案。其次,根据列车编组方案短编组小间隔控制需求,基于深度确定性策略梯度(Deep Deterministic Policy Gradient,DDPG)算法设计列车自适应控制模型,模型中通过设置奖励函数实现列车多目标控制,通过设计神经网络输出列车最优控制策略。然后,利用Matlab/Simulink仿真平台,以上海地铁2号线2A-2A列车通信协同运行为例,设置其追踪间隔为10 s,搭建加入随机阻力扰动的列车自适应控制模型并进行训练。研究结果表明:列车停车误差为0.1 m,准时误差为0.2 s,协同速度差小于2 km/h,区间最小追踪间隔为180.6 m,满足列车精准停车、速度协同和间隔安全性要求。针对DDPG算法估值过高而导致列车运行速度波动的问题,将神经网络中的Critic网络进行改进,改进后训练仿真表明:列车停车误差为0.03 m,准时误差为0.1 s,协同速度差小于2 km/h,区间最小追踪间隔为181.1 m,列车停车精度和间隔安全性均有提高,且速度波动相对平稳。最后,为验证该控制方法的实时性和安全性,假设前车在意外情况下减速停车,经仿真验证:后车停车误差为1.3 s,停车间隔为220.8 m,满足实时性和安全性的要求。研究成果可为城市轨道交通提供一种灵活匹配客流量的行车编组方案,为新型列控系统列车短编组小间隔运行提供一种安全高效的自适应控制方法。

实体与程序双重视角下危险作业罪司法适用的限制研究

危险作业罪作为积极刑法观背景下新增轻罪,在当前司法实践中存在“生产、作业中”的外延勘定不明、“现实危险”的认定因素混乱、类案刑种的选择与裁量偏差过大等问题。基于预防重罪机能与限制入罪机能的考量,适宜将危险作业罪认定为业务过失具体危险犯。立足于实体与程序协同的治理立场对该罪进行限制,一方面需要采取实质理性的刑法解释对该罪的三种危险行为(侵害类行为、不作为类行为、未经许可或批准类行为)与现实危险状态进行实体法维度的限制,另一方面需要创设既独立于当前附条件不起诉制度又区别于当前酌定不起诉制度的微罪附条件不起诉制度对该罪运行进行程序法维度的过滤。

农业生产性服务业与新型农业经营主体耦合协调关系的实证研究--以吉林省为例

在乡村振兴和农村产业融合大背景下,正确认识和处理农业生产性服务业和新型农业经营主体之间的协调发展关系具有重要意义。为明确农业生产性服务业与新型农业经营主体两系统的耦合协调关系,基于吉林省2010-2022年农业生产性服务业与新型农业经营主体的时间序列数据,运用协整分析、Granger因果检验和耦合协调模型分析农业生产性服务业与新型农业经营主体间的互动关系和动态耦合发展趋势。结果表明:吉林省农业生产性服务业与新型农业经营主体发展水平持续攀升,分别由0.284 9提升至0.837 9、0.100 1提升至0.994 1;农业生产性服务业与新型农业经营主体两系统存在着显著正相关的长期均衡关系,且互为格兰杰原因,即农业生产性服务业是有效促进新型农业主体发展的重要原因,新型农业经营主体是推动推动农业生产性服务业提升的重要动力;2010-2022年,吉林省农业生产性服务业与新型农业经营主体之间的耦合协调关系上升趋势明显,先后经历拮抗阶段(0.410 9)、勉强协调(0.517 9~0.572 0)、初级协调(0.637 4)、中级协调(0.735 8~0.773 8)、高度协调(0.843 1~0.870 9~0.916 6~0.914 7~0.914 8~0.915 3~0.915 7)的变化过程,目前两系统处于关系稳定的高水平耦合阶段。未来应通过促进农业生产性服务业与新型农业经营主体协调发展推进现代农业进程。

基于信创环境的水利智搜优化设计与研究

为提高水利智搜数据采集效率、个性化推荐程度、协调运维能力、信创环境适配程度,向社会公众提供便捷高效的水利信息检索服务,结合核心技术自主可控的必然要求,研究运用数据采集、搜索推荐模型等智能化处理技术,进一步优化搜索算法,加强数据信息采集。同时,通过优化水利智搜平台设计,基于信创环境适配优化,采用集成式、场景式和交互式一体化数据呈现方式,提升支撑、统计分析、搜索和聚合能力,实现精准化推荐和协同化运维。基于信创环境的水利智搜优化设计与研究,可为水利行业智能化信息检索服务提供经验借鉴。

基于麻雀搜索算法的梯级泵站优化调度

针对梯级泵站系统运行效率普遍偏低、能耗损失较大等问题,建立了梯级泵站优化调度模型,引入了寻优能力强、搜索精度高的麻雀搜索算法(SSA),对算法中安全阈值和侦察者占比两参数进行了比选;据此提出了基于SSA算法的梯级泵站优化调度方法,并将其应用于密云水库调蓄工程中的三级泵站优化调度研究。结果表明,三种不同流量工况下,相较于现状方案,PSO及GA算法所得优化方案其系统运行效率可提升0.03%~0.18%,年运行成本可节省¥9,700~¥69,500。利用SSA算法所获优化方案在两项指标改进方面更为突出,可达到0.98%~1.20%的效率提升及¥369,000~¥443,900的年运行费用的节省,验证了SSA算法在梯级泵站优化调度中的可行性和高效性,可为梯级泵站优化调度提供一种合理可靠的方法。

面向供需协同的城际通道高速列车开行方案优化研究

探讨城际通道短距离多线路列车优化问题,建立城际通道高速列车开行方案优化模型,提升列车运输效益和服务水平。针对城际通道线路特点,以多线路、多列车类型为基础构造列车流路径网络;分析旅客出行费用偏差,将客票费用偏差和旅行时间费用偏差相结合考虑,通过引入旅客对不同因素的容忍度参数,提出旅客出行需求与运输供给的协同偏差,进而建立供需协同的城际通道列车开行方案优化模型。以模拟退火算法为基础,设计模型求解算法。最后通过算例进行仿真验证,结果表明,利用该方法得到的开行方案,能在满足旅客需求条件下,在列车运输效率、运营收益和服务质量方面得到一定程度的提高,从而为高速铁路列车开行方案优化提供新思路。

新一代低压直流供用电系统多工作模式下能量协调控制策略

新一代低压直流供用电系统(low voltage direct current supply and utilization system,LVDCSUS)强调了可再生能源的消纳以及直流用户侧电能产–销–储–用之间的协调统一,为推动直流用户侧灵活参与电力系统运行提供了全新思路。开展LVDCSUS用户侧电能的使用与生产相结合的研究,可有效挖掘直流用户侧的多元化电能资源灵活供给能力,为此该文首先依据LVDCSUS系统能量平衡关系将系统划分为全直流运行、余电上网运行、交流支撑运行3种运行模式;进而给出各模式下满足直流母线电压稳定、储能荷电状态均衡、灵活性电力资源利用三方面整体要求的协调策略;最后建立了多运行模式切换规则,实现通过切换多种运行模式改变能量协调控制策略,使LVDCSUS在稳定运行状态下主动参与电力系统能量互动。仿真结果验证了LVDCSUS多运行模式控制策略的有效性和可靠性。

虚拟编组条件下列车区间解耦和耦合适用性分析

列车在区间进行虚拟解耦和耦合作业实现编组数量的动态变化,进一步提高城市轨道交通运营组织的灵活性。将列车区间虚拟解耦和耦合作业与传统快慢车、大小交路和Y型线的运输组织模式相结合,基于相对制动距离的安全防护方法提出虚拟编组下列车最小安全追踪距离的计算公式,考虑列车参数、区间长度、区间限速和安全间隔等影响因素,分析列车区间虚拟解耦和耦合作业的运动过程及适用性。仿真结果表明,虚拟编组相较于常规移动闭塞情况列车最小安全追踪距离缩短了69%以上;市区线由于站间距较短,区间耦合目标速度需低于30 km/h,宜在车站进行静态作业,而市郊线和城际线站间距较长,区间解耦目标速度和耦合目标速度分别能达到160 km/h和80 km/h,宜在车站和区间进行作业;区间动态作业相比于车站静态作业能力提高了40.9%。