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.

From Control Theory to Gravitational Waves

When D:ξ→η is a linear ordinary differential (OD) or partial differential (PD) operator, a “direct problem” is to find the generating compatibility conditions (CC) in the form of an operator D1:η→ξ such that Dξ = η implies D1η = 0. When D is involutive, the procedure provides successive first-order involutive operators D1,...,Dn when the ground manifold has dimension n. Conversely, when D1 is given, a much more difficult “inverse problem” is to look for an operator D:ξ→η having the generating CC D1η = 0. If this is possible, that is when the differential module defined by D1 is “torsion-free”, that is when there does not exist any observable quantity which is a sum of derivatives of η that could be a solution of an autonomous OD or PD equation for itself, one shall say that the operator D1 is parametrized by D. The parametrization is said to be “minimum” if the differential module defined by D does not contain a free differential submodule. The systematic use of the adjoint of a differential operator provides a constructive test with five steps using double differential duality. We prove and illustrate through many explicit examples the fact that a control system is controllable if and only if it can be parametrized. Accordingly, the controllability of any OD or PD control system is a “built in” property not depending on the choice of the input and output variables among the system variables. In the OD case and when D1 is formally surjective, controllability just amounts to the formal injectivity of ad(D1), even in the variable coefficients case, a result still not acknowledged by the control community. Among other applications, the parametrization of the Cauchy stress operator in arbitrary dimension n has attracted many famous scientists (G. B. Airy in 1863 for n = 2, J. C. Maxwell in 1870, E. Beltrami in 1892 for n = 3, and A. Einstein in 1915 for n = 4). We prove that all these works are already explicitly using the self-adjoint Einstein operator, which cannot be parametrized and the comparison needs no comment. As a byproduct, they are all based on a confusion between the so-called div operator D2 induced from the Bianchi operator and the Cauchy operator, adjoint of the Killing operator D which is parametrizing the Riemann operator D1 for an arbitrary n. This purely mathematical result deeply questions the origin and existence of gravitational waves, both with the mathematical foundations of general relativity. As a matter of fact, this new framework provides a totally open domain of applications for computer algebra as the quoted test can be studied by means of Pommaret bases and related recent packages.

A Computational Synthesis Approach of Mechanical Conceptual Design Based on Graph Theory and Polynomial Operation

The design synthesis is the key issue in the mechanical conceptual design to generate the design candidates that meet the design requirements.This paper devotes to propose a novel and computable synthesis approach of mechanisms based on graph theory and polynomial operation.The graph framework of the synthesis approach is built firstly,and it involves:(1)the kinematic function units extracted from mechanisms;(2)the kinematic link graph that transforms the synthesis problem from mechanical domain into graph domain;(3)two graph representations,i.e.,walk representation and path representation,of design candidates;(4)a weighted matrix theorem that transforms the synthesis process into polynomial operation.Then,the formulas and algorithm to the polynomial operation are presented.Based on them,the computational flowchart to the synthesis approach is summarized.A design example is used to validate and illustrate the synthesis approach in detail.The proposed synthesis approach is not only supportive to enumerate the design candidates to the conceptual design of a mechanical system exhaustively and automatically,but also helpful to make that enumeration process computable.

Exploration and Practice of Ideological and Political Theories Teaching in Operations Research Courses Based on the“Trinity”

This study analyzes the background of ideological and political theories teaching in operations research courses and provides a design framework for ideological and political theories teaching in operations research courses based on“trinity”according to real teaching practices.This article summarizes the merging point of ideological and political theories teaching in operations research courses,taking ability and knowledge as its carrier and ideological and political theories teaching as its core,as well as discusses four methods of ideological and political theories teaching:online and offline interactive teaching,stimulating independent learning by practical application,seminar-style flipped classroom,and promoting theoretical teaching through competition and scientific research.

Recommendations for Large-scale Farmland Operation in Hilly Areas Based on Long Tail Theory

At the background of urban and rural integration,this paper analyzed and discussed factors restricting large-scale farmland operation in China's hilly areas from the qualitative perspective. It recognized large-scale farmland operation on the basis of the long tail theory. Finally,it came up with recommendations for developing large-scale farmland operation in hilly areas.

Completeness of the system of eigenvectors of off-diagonal operator matrices and its applications in elasticity theory

This paper deals with off-diagonal operator matrices and their applications in elasticity theory. Two kinds of completeness of the system of eigenvectors are proven, in terms of those of the compositions of two block operators in the off-diagonal operator matrices. Using these results, the double eigenfunction expansion method for solving upper triangular matrix differential systems is proposed. Moreover, we apply the method to the two-dimensional elasticity problem and the problem of bending of rectangular thin plates on elastic foundation.

“OperaPMS”在酒店管理与数字化运营专业教学应用的途径与方法

为提升客人入住体验,酒店专业人才不仅需要熟练操作智能化系统,还需要基于客人实际需求灵活应用智能化功能与服务,体现个性化服务与细微服务。基于“Opera PMS”在酒店管理与数字化运营专业教学应用中的重要性,以浙江旅游职业学院、唐山工业职业技术学院、湖南工程职业技术学院3所高职院校的“Opera PMS”课程为研究对象,实际调研并对比分析教学实施情况,剖析教学过程中存在的问题及原因,就如何将“Opera PMS”技术与专业课程教学有机融合的问题,分别从重构专业核心能力课程体系,推进线上线下相结合的理实一体项目化教学,完善与落实机房管理制度以及持续性优化教师专业综合能力等方面提出“Opera PMS”教学应用的途径与方法。

Invariant operator theory for the single-photon energy in time-varying media

After the birth of quantum mechanics, the notion in physics that the frequency of light is the only factor that determines the energy of a single photon has played a fundamental role. However, under the assumption that the theory of Lewis-Riesenfeld invariants is applicable in quantum optics, it is shown in the present work that this widely accepted notion is valid only for light described by a time-independent Hamiltonian, i.e., for light in media satisfying the conditions, ε（t） = ε（0）, u（t） = u（0）, and σ（t） = 0 simultaneously. The use of the Lewis Riesenfeld invariant operator method in quantum optics leads to a marvelous result： the energy of a single photon propagating through time-varying linear media exhibits nontrivial time dependence without a change of frequency.

Intraoperative Care of the Conscious Patient from the Perspective of the Operating Theatre Nurse:A Grounded Theory

Introduction: Intraoperative care includes a unique knowledge of how to perform a safe and effective surgery procedure. Surgery performed under regional or local anaesthesia allows the patient to remain conscious during the procedure and is rather common in Swedish healthcare today. Aim: The aim was to obtain a deeper understanding of the main concerns of operating theatre nurses (OTN) when caring for conscious patients during the intraoperative phase. Methods: Interviews were conducted with 23 OTNs from five different hospitals in Sweden and analysed according to grounded theory. Findings: The main concern among the OTNs was to take the patient in consideration. The core category “achieve and maintain ethical treatment of patients” in the operating theatre (OT) was a strategy used throughout the intraoperative process. Ethical treatment was described as moral behaviour at different levels and included the team’s behaviour, respectful and individualised patientcare, and the working-morale of the professionals. Being vigilant and being flexible were the categories related to the core category. The OTNs constantly assessed where to pay most attention as they balanced between the needs of the patient, the team, and the surgery procedure. Conclusion: It is important that every patient is taken into consideration and that ethical principles are held to the highest standards in the OT. A familiar team can facilitate that. The complex skills that operating theatre nurses develop can be added to explain important competencies within the profession.

New Configurations of the Fuzzy Fractional Differential Boussinesq Model with Application in Ocean Engineering and Their Analysis in Statistical Theory

The fractional-order Boussinesq equations(FBSQe)are investigated in this work to see if they can effectively improve the situation where the shallow water equation cannot directly handle the dispersion wave.The fuzzy forms of analytical FBSQe solutions are first derived using the Adomian decomposition method.It also occurs on the sea floor as opposed to at the functionality.A set of dynamical partial differential equations(PDEs)in this article exemplify an unconfined aquifer flow implication.Thismethodology can accurately simulate climatological intrinsic waves,so the ripples are spread across a large demographic zone.The Aboodh transform merged with the mechanism of Adomian decomposition is implemented to obtain the fuzzified FBSQe in R,R^(n) and(2nth)-order involving generalized Hukuhara differentiability.According to the system parameter,we classify the qualitative features of the Aboodh transform in the fuzzified Caputo and Atangana-Baleanu-Caputo fractional derivative formulations,which are addressed in detail.The illustrations depict a comparison analysis between the both fractional operators under gH-differentiability,as well as the appropriate attributes for the fractional-order and unpredictability factorsσ∈[0,1].A statistical experiment is conducted between the findings of both fractional derivatives to prevent changing the hypothesis after the results are known.Based on the suggested analyses,hydrodynamic technicians,as irrigation or aquifer quality experts,may be capable of obtaining an appropriate storage intensity amount,including an unpredictability threshold.

Dynamic Quantity Theory of Money:Research on Monetary Cycle and Business Cycle Based on the Concepts of Issuing Money and Operating Money

The Quantity Theory of Money and the Theory of Credit Creation have been the major streams in the study of the quantity of money.Nowadays,monetary theory is dominated by the Quantity Theory of Money because the Monetarist School and the Rational Expectation School are both the advocates of the Quantity Theory of Money,which has resulted in a sharp decrease of scholars studying the Theory of Credit Creation.Nevertheless,the two theories will ultimately converge.Given that reason,we propose a new theory-Dynamic Quantity Theory of Money in this paper,by which the unification of the Quantity Theory of Money and the Theory of Credit Creation can be achieved.Based on the Dynamic Quantity Theory of Money,we further put forward the Theory of Money Operation Cycle,the Theory of Monetary Compensation and Theory of Investment Compensation targeting economic crises,expound why Quantitative Easing monetary policy fails and why Quantitative Easing does not cause inflation in the short term under the premise of these theories,and demonstrate the necessity of fiscal investment for rescuing economic crisis from the perspective of theories of money.

Semigroup of Weakly Continuous Operators Associated to a Generalized Schrödinger Equation

In this work, we prove the existence and uniqueness of the solution of the generalized Schrödinger equation in the periodic distributional space P’. Furthermore, we prove that the solution depends continuously respect to the initial data in P’. Introducing a family of weakly continuous operators, we prove that this family is a semigroup of operators in P’. Then, with this family of operators, we get a fine version of the existence and dependency continuous theorem obtained. Finally, we provide some consequences of this study.

Group of Weakly Continuous Operators Associated to a Generalized Schrödinger Type Homogeneous Model

In this work, we prove the existence and uniqueness of the solution of the generalized Schrödinger type homogeneous model in the periodic distributional space P’. Furthermore, we prove that the solution depends continuously respect to the initial data in P’. Introducing a family of weakly continuous operators, we prove that this family is a group of operators in P’. Then, with this family of operators, we get a fine version of the existence and dependency continuous theorem obtained. Finally, we give some remarks derived from this study.

Self Organizing Communities: Enhancing Cooperation through Competition

One of the open issues in today’s networking world is efficient content retrieval, storage, and provision. Numerous studies have been carried out in order to optimize the distribution and provision of content to end users. This is emphasized in today’s mobile networks that the ubiquity of network resources is considered an expected fact. In this paper we propose an architecture that is based on node co-operation that enhances the content distribution and retrieval. The architecture consists of the formation of loosely coupled and autonomous communities among nodes that share common interests where the already existing content is shared in a “common pool”. The co-operation is enforced by the acquisition of extra bandwidth that is distributed to the most helpful members. The autonomic aspect of the communities is based on the embedded mechanisms for cluster behavior, namely, voting, where the nodes decide themselves which members should be awarded, and reporting, where misbehaving nodes are removed from the community. In this paper the different elements of the architecture will be described, together with a theoretic study of its viability, and finally a set of simulations that evaluate its performance.

STUDY ON PRODUCTION SYSTEM OPERATION REGULARITY OF FULLY MECHANIZED SUBLEVEL CAVING MINING AND SEQUENTIAL OPERATION

According to a lot of practical data in Liujialiang Mine and reliability theory and result of computer simulation, operation regularity of fully mechanized sublevel caving mining production system in the condition of gently inclined complicated geological structure and production shortcomings are found out and reliability of system and output of the working face are predicted finally.

基于组合赋权的压裂作业人因失误概率研究

压裂作业强度大,环境恶劣,长时间枯燥的作业容易诱发人因失误,造成事故,分析压裂现场人因可靠性对于提升压裂作业的安全和效率具有重要意义。在考虑压裂现场情境因素影响基础上,提出了一种组合赋权模糊人因可靠性分析方法,用以评估压裂现场人因失误概率。首先,通过对压裂现场的调研分析,结合压裂作业情境环境特点,基于认知可靠性与失误分析方法(CREAM)建立了适用于评估压裂作业的一级共同绩效条件CPC 8个,二级CPC因子评估指标36个。其次,根据实际工况中各CPC对人的绩效可靠性的影响程度不同,提出以差异系数法确定线性组合系数,基于序关系法与熵权法对各项评估指标进行主客观线性组合赋权。最后,利用本文方法分析四川某页岩气压裂作业现场人因失误概率,结果表明,较一般模糊CREAM方法,在不同情境环境下,随着情境环境水平的下降,组合赋权模糊CREAM方法对CPC评价数据敏感度更高,人因失误概率增加,并且变化速率加快,这与现场实际工况一致,为压裂现场的人因可靠性分析和人因失误概率量化结果优化提供了参考。

新能源汽车电池回收网点竞争选址模型及算法

针对考虑排队论的新能源汽车电池回收网点竞争设施选址问题,提出一种改进的人类学习优化(IHLO)算法。首先,构建包含排队时间约束、容量约束和门槛约束等条件的新能源汽车电池回收网点竞争设施选址模型;然后,考虑到该问题属于NP-hard问题,针对人类学习优化(HLO)算法前期收敛速度较慢、寻优精度不够高、求解稳定性不够高的不足,通过引入精英种群反向学习策略、团队互助学习算子和调和参数自适应策略提出IHLO算法;最后,以上海市和长江三角洲为例进行数值实验,并将IHLO算法和改进二进制灰狼(IBGWO)算法、改进二进制粒子群(IBPSO)算法、HLO算法和融合学习心理学的人类学习优化(LPHLO)算法进行比较。大、中、小三种不同规模的实验结果表明,IHLO算法在15个指标中的14个指标上表现最优,IHLO算法比IBGWO算法求解精度至少提高了0.13%,求解稳定性至少提高了10.05%,求解速度至少提高了17.48%。所提算法具有较高的计算精度和优化速度,可有效解决竞争设施选址问题。

Peyton四步教学法在泌尿外科临床实习带教中的应用

目的 评估Peyton四步教学法在泌尿外科临床实习带教中的应用效果。方法 选取2023年4月至2024年2月在北京协和医院泌尿外科小组轮转的临床实习医师14人,随机分为研究组7名和对照组7名。研究组采用Peyton四步教学法进行临床带教,对照组采用常规教学法进行临床带教。两组实习医师经过1月轮转学习后,进行理论考核和临床技能考核,同时采用调查问卷的方式评价临床带教效果。结果 研究组和对照组两组实习医师的理论成绩分别为(93.60±3.05)分和(91.80±2.39)分,差异无统计学意义。临床技能考核成绩分别为(92.00±1.87)分和(86.80±3.27)分(P<0.05),在临床技能方面,研究组成绩提升明显。调查问卷结果反馈,Peyton教学组在学生满意度和教师满意度均优于对照组。结论 应用Peyton四步教学法可以明显提高实习医师的临床技能成绩,带教老师和学生均对Peyton四步教学法模式的满意度较高,适合在泌尿外科临床推广应用。

基于模糊Petri网的引航员作业舒适度评价

为提高引航员的作业舒适度,提出一种基于模糊Petri网(FPN)的模糊推理算法(FRA)下的组合评价方法。首先,针对作业舒适度影响因子的不确定性信息,建立多因素耦合的FPN拓扑结构;然后,采用博弈论组合赋权法确定最优组合权重,提出融合层间相关性判断临界重要性、层次分析法和FRA,建立基于主客观权重的FRA,通过迭代求解库所可信度和状态矩阵;最后,结合上海港船舶引航的场景数据,基于FPN的FRA应用,评价引航员作业舒适度。结果表明:环境与引航设备是影响其作业舒适度的关键因素,冬季和夏季的引航作业舒适度评价等级对应“较不舒适”,其中,5月份为“较舒适”。所提方法充分体现系统舒适度影响因素的耦合特性。

基于STEAM理论的学龄前儿童益智类玩具设计研究

本文以设计出一套切合STEAM理论的益智玩具为目的,同时能够提升学龄前儿童的各项智力能力。通过文献查阅对STEAM理论进行深入分析,归纳出STEAM理论的4项特点,STEAM益智玩具应满足的5个方面。根据皮亚杰理论对儿童的分析,选择前运算阶段儿童为目标群体,归纳出该阶段儿童的4项益智需求。通过上述分析设计出一款STEAM益智玩具套装,为后续STEAM益智玩具设计提供了参考。