Two-Stage Optimal Scheduling of Community Integrated Energy System

From the perspective of a community energy operator,a two-stage optimal scheduling model of a community integrated energy system is proposed by integrating information on controllable loads.The day-ahead scheduling analyzes whether various controllable loads participate in the optimization and investigates the impact of their responses on the operating economy of the community integrated energy system(IES)before and after;the intra-day scheduling proposes a two-stage rolling optimization model based on the day-ahead scheduling scheme,taking into account the fluctuation of wind turbine output and load within a short period of time and according to the different response rates of heat and cooling power,and solves the adjusted output of each controllable device.The simulation results show that the optimal scheduling of controllable loads effectively reduces the comprehensive operating costs of community IES;the two-stage optimal scheduling model can meet the energy demand of customers while effectively and timely suppressing the random fluctuations on both sides of the source and load during the intra-day stage,realizing the economic and smooth operation of IES.

Whole-Process Project Cost Management Based on Building Information Modeling (BIM)

The whole-process project cost management based on building information modeling(BIM)is a new management method,aiming to realize the comprehensive optimization and improvement of project cost management through the application of BIM technology.This paper summarizes and analyzes the whole-process project cost management based on BIM,aiming to explore its application and development prospects in the construction industry.Firstly,this paper introduces the role and advantages of BIM technology in engineering cost management,including information integration,data sharing,and collaborative work.Secondly,the paper analyzes the key technologies and methods of the whole-process project cost management based on BIM,including model construction,data management,and cost control.In addition,the paper also discusses the challenges and limitations of the whole-process BIM project cost management,such as the inconsistency of technical standards,personnel training,and consciousness change.Finally,the paper summarizes the advantages and development prospects of the whole-process project cost management based on BIM and puts forward the direction and suggestions for future research.Through the research of this paper,it can provide a reference for construction cost management and promote innovation and development in the construction industry.

SINGLE MACHINE SCHEDULING WITH CONTROLLABLE PROCESSING TIMES AND COMPRESSION COSTS （PART I：EQUAL TIMES AND COSTS）

Abstract Most papers in scheduling research have treated individual job processing times as fixed parameters. However, in many practical situations, a manager may control processing time by reallocating resources. In this paper, authors consider a machine scheduling problem with controllable processing times. In the first part of this paper, a special case where the processing times and compression costs are uniform among jobs is discussed. Theoretical results are derived that aid in developing an O(n 2) algorithm to slove the problem optimally. In the second part of this paper, authors generalize the discussion to general case. An effective heuristic to the general problem will be presented.

SINGLE MACHINE SCHEDULING WITH CONTROLLABLE PROCESSING TIMES AND COMPRESSION COSTS ： PROOF OF THEOREMS

Abstract This report is virtually the appendix part of the author's previous paper which includes the proofs for the theorems and lemmas.

Effects of Information Technologies Over Decision-Making Process About Cost Controlling at Food and Beverage Departments at Five-Star Hotels

Information technologies play an important role in many business areas. One of these areas is hotel information system. Many operations, such as check-in, check-out, and food and beverage, are performed owing to information technologies. Package programs are used for managing hotel operations. Software provides reporting, filtering, remote accessing, and cost control services which are important key parameters of decision-making processes of hotel managers. Cost control is one of the most important operations in hotel management. Cost control service of package programs assists managers in monitoring overall cost and computing each department＇s partial cost and serves information to the different departments of hotels using information technologies. Cost control is important in the departments which are profitable in a hotel. Food and beverage is one of these profitable departments, which is the second profitable department in hotels. It makes profit between mostly 20% and 40%. This research aims to understand effects of information technologies during decision-making processes. The sample of study is food and beverage managers in five-star hotels in Istanbul. Questionnaire was applied to 45 participants.

On guaranteed cost control of linear systems with input saturation

This work studies the problem of control design for linear systems with input saturation.It is well known that integral quadratic constraints(IQC) can be used to describe input saturation and that the use of IQC in analysis can lead to less conservative performance bound and larger domain of attraction.In this work,it is shown that a class of commonly used IQCs may not help in control synthesis.That is,the use of these IQCs does not enlarge the guaranteed domain of performance for synthesis.

基于业财融合的公立医院成本精细化管控研究

随着医保支付制度改革的深入,公立医院的发展方向从规模扩张转向提质增效,成本管理也亟需从粗放式管理转向精细化管控。目前,大多数公立医院的成本管控存在效率低、效果差的问题,必须建立健全成本精细化管控制度、成本管控信息系统、预算成本管理系统,优化成本核算方法,针对各项资源消耗情况制定成本精准化管控措施,并开展成本精细化管控评价,推动医院高质量和可持续发展。

基于主动尾流控制的风电机群协同优化调度

针对机组间尾流效应严重影响风电机组发电效率的问题,提出了风电机组安全偏航约束计算方法、尾流特性混合半机理建模方法以及风电机群多目标协同优化调度方法。基于FAST.FARM平台完善了多自由度可控机组与尾流的动态交互集成仿真环境,对比分析了2台机组串列式排布以及华东地区某海上风电场7台机组实际排布下的协同运行优化性能。结果表明:所建立的集成仿真模型能够合理表征风电机群与空气流场的多领域动态交互特性,所提方法能够有效提升风电机群发电效能,促进经济效益、资源利用和成本控制的均衡优化。

广西产区柑桔溃疡病和柑桔全爪螨同治降本增效技术研究

柑桔全爪螨(俗称红蜘蛛)和柑桔溃疡病是广西沃柑生产上防控用药量最大的两种病虫害。为探索同时防治这两种病虫害的综合技术方案,从而达到降本增效的目的,设计了99%矿物油乳油∶77%氢氧化铜可湿性粉剂∶80%代森锰锌可湿性粉剂=5∶1∶2混配的“油铜锰方案”,并且3—7月在田间开展丰田FT-18型背负式电动喷雾器人工喷雾、极目EA-30XP农业无人机常量飞防和推荐施药量减量30%飞防不同施药方式的对比试验。试验表明,采用“油锰铜方案”防治柑桔红蜘蛛和柑桔溃疡病时,常量飞防和减量飞防的防治效果不低于人工喷雾,有些时期甚至更好。“油锰铜方案”减量飞防对柑桔红蜘蛛的防治效果最高可达97.71%,对柑桔溃疡病的防治效果可达98.57%。“油锰铜方案”减量飞防可实现“一高三减”的效果,即每小时10×667 m^(2)的高施药工效、减少用水量94%、减少人工成本33.33%和减少农药使用量37.5%。“油锰铜方案”减量飞防能有效解决广西沃柑产区柑桔溃疡病、柑桔红蜘蛛“一病一虫”施药难、防治效果差和防治成本高的难题,可在地势平坦的柑桔产区大面积推广应用。

数字化转型对制造业企业风险承担水平的影响

数字化转型背景下,提高风险承担水平对制造业企业可持续发展具有重要的影响作用。文章以2012—2022年中国A股制造业上市公司为研究样本,通过构建过程机制模型,考察数字化转型对制造业企业风险承担水平的影响。结果表明:数字化转型显著提高了制造业企业风险承担水平;外部交易成本和内部控制质量在数字化转型影响制造业企业风险承担水平过程中发挥中介作用;供应链集成对数字化转型影响制造业企业风险承担水平起正向调节作用;数字化转型对制造业企业风险承担水平的提升作用在非国有制造业企业中显著,而在国有制造业企业中不显著。

集成设备状态控制的柔性作业车间节能调度方法

柔性作业车间节能调度与设备节能控制是优化车间加工能耗和空闲能耗的两个关键步骤,但以往设备节能控制与调度通常分段进行优化,忽视了调度优化结果对设备状态控制决策过程的强约束,从而限制了车间的节能优化潜力。为此,提出一种设备状态控制与车间节能调度集成优化的方法。首先,通过分析工件排序、设备选择和设备节能控制策略变化对车间能耗的综合影响,建立集成设备状态控制的车间调度优化模型。其次,根据集成优化问题特性,设计了一种基于工件序列、机器序列和设备状态控制序列的三层式编码方式,同时,提出自适应分层策略和节能调度规则改进多目标优化算法对集成优化模型进行求解。最后,结合Brandimarte中的标准算例,通过对车间调度和设备状态控制分段式优化结果进行对比,验证所提方法的有效性。

自动装配的导纳控制系统中关键影响机制研究

在工业自动装配中,机械卡阻现象经常导致零件接触力增大,进而导致装配失败。本文以汽车装配中车门销与车身孔的装配任务为背景,运用导纳控制方法解决柔顺性难题。受导纳参数(弹性、阻尼和质量)的影响,控制系统可能在稳态误差、超调量和响应速度等方面出现不同程度的波动。为消除稳态误差的影响,本文采用基于倍率调节的积分优化方法成功消除稳态误差。面对超调量和响应速度不平衡的问题,本文提出一种基于罚函数的自动调参算法。通过设置惩罚项,在求解过程中逐渐满足约束条件。实验结果表明:接触力的震荡波动从0.1 N减小至0.05 N,当外界阻抗消失时,缩短50%的回落调整时间。该方法成功避免震荡引起的零件损坏,能够提高自动装配时的柔顺性能。

电池储能温度-功率特性建模及其在综合能源系统中的应用

针对综合能源系统(IES)中电池储能在极端高温、低温下寿命衰减快、性能差的问题,该文提出含温度-功率特性的电池储能运行模型及含电池储能温度控制的IES低碳经济调度方法。通过电池特性实验和软件仿真,构建电池电热耦合模型,并提出相应的电热耦合模型凸化方法;根据凸化电池电热耦合模型估算电池温度并构建含温度-功率特性的电池储能运行模型,分析电、气、冷、热多能流耦合特性,构建IES低碳经济运行模型;结合电池储能运行模型及其温度控制,以最小化IES总运行成本为目标,构建混合整数规划模型,制定IES经济调度策略。为验证所提方法的效果,该文根据不同季节运行场景,构建仿真模型,将所提方法与不包含电池储能温度控制的方法进行对比。对比结果表明,所提方法可以有效提升电池储能运行的使用寿命、热安全性及利用率,降低IES运行成本与碳排放量。

BIM技术在施工成本控制中的应用研究

针对BIM技术在施工成本控制中的应用进行分析,提出BIM技术应用的优点以及面临的困难,并构建基于BIM5D模型数据库的成本控制体系。以某市的农贸市场项目为例,结合该项目进度和成本数据,实现物资、图纸、质量和安全等信息的实时监测,利用模型数据的更新减少设计变更,达到缩短工期和成本控制的效果。研究表明,BIM5D数据平台下,项目施工成本得到了有效控制,成本盈余在200~400万元区间浮动,说明BIM5D数据平台下的成本控制效果较好,能够为施工成本控制提供技术支持。

赢得值法在基建项目施工阶段成本控制的应用

因现行各种政策及制度的存在,建筑行业内部竞争压力极大,建筑施工成本不断增加,企业利润逐年减少,只有有效控制工程成本才能够在当今环境中获利。以新建体育馆项目为例,对施工各阶段成本、进度等方面数据进行收集、整理,应用赢得值法对数据进行分析,得出每个阶段成本和进度控制现状,根据成本和进度的偏差找出项目此阶段存在的问题,并制定出对应的方案,在项目下一阶段执行方案中的具体措施,动态整理成本与进度数据,验证措施执行效果,使项目在可控的情况下节约成本并按期完成。结果表明:应用赢得值法在施工阶段可以对项目各种成本及施工进度进行有效控制,在工程应用过程中具有现实意义。

低成本惯性多冗余导航控制一体机设计

为了智能体的精确定位和定姿,实现其稳定运动控制,设计了一种低成本多惯性冗余导航控制一体机,给出了设计方法。稳压电路的开关电源MP2482DN和线性电源JW29300U-3.3V为一体机提供稳定5 V和3.3 V的较大功率电源;控制器STM32H7的SPI采用星形拓扑总线与3片六轴惯性芯片BMI088通信,2路TTL串口与差分卫星定位板双向通信,实现智能体定位和定姿;控制器STM32F4的CAN总线接口与智能体底盘双向通信,实现其运动控制,1路TTL串口实现与控制器STM32H7的双向通信;两控制器的网络接口与上位机组成无线局域网,实现数据交换和状态监控。整个系统具有功耗低、体积小、成本低、接口丰富的特点。

基于模型预测控制的风光储综合能源系统优化调度

由于风光及用户侧的不确定性,采用传统的优化调度响应不及时会导致日内的供需不平衡。为此,构建一种含风机、光伏、蓄电池和光热的风光储综合能源系统,充分利用可再生能源,并在日前调度的基础上,基于模型预测控制算法并结合能源系统的状态空间方程,建立日内滚动优化数学模型;在Matlab平台上进行典型日的算例仿真,分析系统各设备的功率输出及供能情况,仿真结果显示:在3种典型日下该系统日运行费用较日前分别减少12.3%、7.4%、11.3%,且供电、热不平衡率均有所下降,提高了供能系统运行的经济性和可靠性。

单位基建管理的多维考量与优化路径

本文对单位基建管理进行多维考量并探寻优化路径。首先强调单位基建管理的重要性,阐述其核心要素包括费用控制、进度把控和质量保证。接着通过单身公寓成功案例和游泳池失败案例分析,揭示单位基建管理在决策、实施和使用阶段的关键问题。普遍问题有决策阶段的盲目性与不科学性、实施阶段各方协调不畅与质量隐患、使用阶段价值发挥不充分与成本控制难题。最后提出单位基建管理的优化路径,涵盖决策、实施和使用阶段,强调科学管理和共同努力以确保基建项目成功,提升单位基建管理水平。

“三融合两控制”理念在工业项目海绵城市设计中的应用

海绵城市技术有助于降低工业项目污染物排放和提高水资源利用率,同时也可以改善环境质量。该文提出了“三融合两控制”设计理念,即通过将海绵城市与给排水、园林景观和环保设施充分融合,达到最佳的径流控制效果;通过控制海绵城市设计指标与高造价LID设施的使用,可有效降低海绵城市工程的增量成本。然后以某工业厂房项目的海绵城市设计方案与工程实践为例,阐述了该理念在工业厂房项目设计中应用方法,以期为新建工业厂房项目合理应用海绵城市技术提供参考。

两阶段鲁棒优化调度的光伏逆变器集中接入主动配电网研究

常规方法约束鲁棒优化目标函数时,忽略了光伏逆变器无功辅助约束条件,导致配电网优化后弃光费用和购电成本较高,为此提出了接入光伏逆变器的鲁棒优化调度方法。以最小化总预期成本为目标,计算两阶段鲁棒优化目标函数。第一阶段选取光伏能源、波动性负荷等调度成本;第二阶段选取弃光和失负荷的惩罚成本,通过支路潮流、配电网充放电功率限制,约束第一阶段目标函数;根据光伏逆变器无功辅助服务、逆变器接入节点电压等,约束第二阶段目标函数,构建鲁棒优化模型,搜索模型最优解,选取预期成本最小化的调度决策。选取电-热联供型配电网,接入6个光伏逆变器,设置对比实验,结果表明,针对不同波动范围恶劣场景,设计方法相比常规方法,减少了弃光费用和购电成本,降低了弃光和失负荷量。