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Modelling method of inter-building movement for campus-scale occupancy simulation:A case study

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Building Simulation 2023年第3期16卷 461-481页

作者： Mingya Zhu Yiqun Pan Zejun wu Zhizhong huang Risto Kosonen School of Mechanical Engineering Tongji UniversityShanghaiChina Sino-German College of Applied Sciences Tongji UniversityShanghaiChina Department of Mechanical Engineering Aalto UniversityEspooFinland College of Urban Construction Nanjing Tech UniversityNanjingChina

As an important factor in the investigation of building energy consumption,occupant behavior(OB)has been widely studied on the building *** so far,studies of OB modelling on the district scale remain ***,district-scale OB modelling has been facing the challenges from the scarcity of district-scale data,modelling methods,as well as simulation *** study initiates the extrapolation of occupancy modelling methodology from building level to district scale through proposing modelling methods of inter-building *** proposed modelling methods utilize multiple distribution fittings and Bayesian network to upscale the event description methods from inter-zone movement events at the building level to inter-building movement events at the district *** study provides a framework on the application of the proposed modelling methods for a university campus in the suburbs of Shanghai,taking advantages of data sensing,monitoring and survey *** the collected campus-scale occupancy data,this paper defines five patterns of inter-building *** pattern represents the dominated inter-building movement events for one kind of students in their daily campus *** on the quantitative descriptions for various inter-building movement events,this study performs the stochastic simulation for the campus district,using Markov chain *** simulation results are then validated with the campus-scale occupancy measurement ***,the impact of inter-building movement modelling methods on building energy demand is evaluated for the library building,taking the deterministic occupancy schedules suggested by current building design standard as a baseline.

关键词： occupancy modelling event description inter-building movement stochastic process transition probability campus buildings data acquisition

ADMM-based Distributed Active and Reactive Power Control for Regional AC Power Grid with Wind Farms

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Journal of Modern Power Systems and Clean Energy 2022年第3期10卷 588-596页

作者： Pengda Wang Qiuwei wu Sheng huang Canbing Li Bin Zhou Center for Electric Power and Energy(CEE) Department of Electrical EngineeringTechnical University of Denmark(DTU)Kgs.Lyngby 2800Denmark School of Electronic Information and Electrical Engineering Shanghai Jiao Tong UniversityShanghai 200240China College of Electrical and Information Engineering Hunan UniversityChangsha 410082China

A distributed active and reactive power control(DARPC)strategy based on the alternating direction method of multipliers(ADMM)is proposed for regional AC transmission system(TS)with wind farms(WFs).The proposed DARPC strategy optimizes the power distribution among the WFs to minimize the power losses of the AC TS while tracking the active power reference from the transmission system operator(TSO),and minimizes the voltage deviation of the buses inside the WF from the rated voltage as well as the power losses of the WF collection *** optimal power flow(OPF)of the TS is relaxed by using the semidefinite programming(SDP)relaxation while the branch flow model is used to model the WF collection *** the DARPC strategy,the large-scale strongly-coupled optimization problem is decomposed by using the ADMM,which is solved in the regional TS controller and WF controllers in parallel without loss of the global *** boundary information is exchanged between the regional TS controller and WF *** with the conventional OPF method of the TS with WFs,the optimality and accuracy of the system operation can be ***,the proposed strategy efficiently reduces the computation burden of the TS controller and eliminates the need of a central *** protection of the information privacy can be enhanced.A modified IEEE 9-bus system with two WFs consisting of 64 wind turbines(WTs)is used to validate the proposed DARPC strategy.

关键词： Alternating direction method of multipliers(ADMM) distributed active and reactive power control(DARPC) optimal power flow(OPF) semidefinite programming(SDP) wind farm

13~17周龄京粉6号蛋鸡微量元素需要量和动态预测模型研究

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动物营养学报 2024年第7期36卷 4316-4328页

作者：米小梅王凌峰程千惠武佳玉安钰许璐镕齐德生华中农业大学动物科学技术学院、动物医学院武汉430070

本试验旨在基于析因法原理,通过饲养试验和比较屠宰试验确定13~17周龄京粉6号蛋鸡微量元素需要量,并建立动态预测模型。试验选用健康且初始体重为(845.47±28.65)g的13周龄京粉6号蛋鸡198只,随机选取102只,分为6个重复,每个重复17只,用... 详细信息

本试验旨在基于析因法原理,通过饲养试验和比较屠宰试验确定13~17周龄京粉6号蛋鸡微量元素需要量,并建立动态预测模型。试验选用健康且初始体重为(845.47±28.65)g的13周龄京粉6号蛋鸡198只,随机选取102只,分为6个重复,每个重复17只,用于生长需要的测定;另外96只蛋鸡用于维持需要的测定。维持需要试验根据不同采食量分为100%自由采食组、70%自由采食组和40%自由采食组,其中100%自由采食组数据与生长需要试验数据共用,70%自由采食组和40%自由采食组每组6个重复,每个重复8只鸡。试验期5周。结果表明:1)蛋鸡生长曲线为y=1925.600exp-4.347exp(-0.02 t);体增重与日龄的动态关系为y′=1180.25exp[-4.347exp(-0.02 t)-0.02]。式中:y表示体增重(g);t表示日龄。2)每只蛋鸡每天铜、铁、锌、锰的生长需要量分别为0.01~0.02 mg/d、0.28~0.47 mg/d、0.21~0.32 mg/d、0.01~0.03 mg/d,维持需求量分别为0.01、0.20、0.08、0.02 mg/d。3)蛋鸡铜、铁、锌、锰需要量与日龄的动态预测模型为:N_(铜)={0.011[1925.600exp-4.347exp(-0.02 t)]^(0.75)-2.242exp[-4.347exp(-0.02 t)-0.02 t]+4.545exp[-8.694exp(-0.02 t)-0.02 t]-0.118exp[-4.347exp(-0.02 t)-0.02 t]+0.455exp[-8.694exp(-0.02 t)-0.02 t]}/ADFI/A;N_(铁)={0.211[1925.600exp-4.347exp(-0.02 t)]^(0.75)-42.371exp[-4.347exp(-0.02 t)-0.02 t]+136.361exp[-8.694exp(-0.02 t)-0.02 t]-22.661exp[-4.347exp(-0.02 t)-0.02 t]+40.908exp[-8.694exp(-0.02 t)-0.02 t]}/ADFI/B;N锌={0.084[1925.600exp-4.347exp(-0.02 t)]^(0.75)+12.747exp[-4.347exp(-0.02 t)-0.02 t]+4.545exp[-8.694exp(-0.02 t)-0.02 t]-24.785exp[-4.347exp(-0.02 t)-0.02 t]+45.454exp[-8.694exp(-0.02 t)-0.02 t]}/ADFI/C;N_(锰)={0.021[1925.600exp-4.347exp(-0.02 t)]^(0.75)-0.236exp[-4.347exp(-0.02 t)-0.02 t]+2.273exp[-8.694exp(-0.02 t)-0.02 t]+0.590exp[-4.347exp(-0.02 t)-0.02 t]+0.045exp[-8.694exp(-0.02 t)-0.02 t]}/ADFI/D。式中:N表示每只蛋鸡每天饲粮中微量元素需要量(mg/kg);t表示日龄;ADFI表示平均日采食量(kg);A、B、C、D分别表示铜、铁、锌、锰的消化率(%)。4)蛋鸡铜、铁、锌、锰需要量与体重的动态预测模型为:N_(铜)=(3.05×10^(-7) LBW^(2)-0.000703 LBW+0.3642+0.011 BW^(0.75))/ADFI/A;N_(铁)=(3.4×10^(-6))LBW^(2)-0.0072 LBW+4.3268+0.211 BW^(0.75))/ADFI/B;N锌=(0.0012 LBW-0.2953+0.084 BW^(0.75))/ADFI/C;N_(锰)=(-1.8×10^(-6) LBW^(2)+0.0039 LBW-1.897+0.021 BW^(0.75))/ADFI/D。式中:N表示每只蛋鸡每天饲粮中微量元素需要量(mg/kg);LBW表示活体重(g);BW^(0.75)表示代谢体重(kg);ADFI表示平均日采食量(kg);A、B、C、D分别表示铜、铁、锌、锰的消化率(%)。综上所述,本试验得出13~17周龄京粉6号蛋鸡铜、铁、锌、锰需求量分别为0.02~0.03 mg/d、0.48~0.67 mg/d、0.29~0.40 mg/d、0.03~0.05 mg/d,并建立了动态预测模型。

关键词：蛋鸡微量元素需要量动态预测模型

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基于“四项工程”构建高校学习型党组织途径创新性研究

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哈尔滨学院学报 2024年第1期45卷 118-122页

作者：吴旭峰李赫鹏哈尔滨学院黑龙江哈尔滨150086

创新高校学习型党组织建设,既要明确建设过程中的困境和弱势,又要通过多层面全方位的角度系统性解决建设中存在的问题。因此,在推进高校学习型党组织建设过程中,可从思想、内容、机制、平台等四个创新点着手,注重形式创新和内涵拓展,结... 详细信息

创新高校学习型党组织建设,既要明确建设过程中的困境和弱势,又要通过多层面全方位的角度系统性解决建设中存在的问题。因此,在推进高校学习型党组织建设过程中,可从思想、内容、机制、平台等四个创新点着手,注重形式创新和内涵拓展,结合高校实际情况合理应对相关问题及不足,强化高校学习型党组织的质量建设,不断提高学习型党组织建设的效益和活力。

关键词：高校学习型党组织建设途径创新

几类典型应用的代数多重网格算法并行可扩展瓶颈分析

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计算物理 2024年第4期41卷 403-417页

作者：毛润彰杜皓田鸿运黄思路张鹏徐小文中国工程物理研究院研究生院北京100088 北京应用物理与计算数学研究所北京100094 南京大学匡亚明学院江苏南京210023 中国工程物理研究院高性能数值模拟软件中心北京100088

对于大规模稀疏线性代数方程组,代数多重网格(AMG)是具有最优计算复杂度的求解算法,但由于其算法流程复杂,导致难以取得理想的并行可扩展性能,难以定位和分析其并行可扩展瓶颈。通过分析AMG算法的性能骨架和通信模式,归纳了三类可扩展... 详细信息

对于大规模稀疏线性代数方程组,代数多重网格(AMG)是具有最优计算复杂度的求解算法,但由于其算法流程复杂,导致难以取得理想的并行可扩展性能,难以定位和分析其并行可扩展瓶颈。通过分析AMG算法的性能骨架和通信模式,归纳了三类可扩展性能瓶颈,并引入稀疏矩阵通信域的概念来刻画稀疏模式对并行通信性能的影响。针对辐射流体力学、结构力学、航空发动机三类实际应用的6个具有不同稀疏模式特征的典型算例,实现了多粒度并行可扩展性能瓶颈的定位与分析,总结了未来AMG并行性能优化方向。

关键词：代数多重网格并行预条件算法并行可扩展性性能分析性能瓶颈

2012至2021年北京佑安医院肝衰竭住院患者流行病学特征

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中华肝脏病杂志 2024年第1期32卷 49-57页

作者：徐曼曼李珊珊杨颜榕武羽杨雪段钟平陈煜首都医科大学附属北京佑安医院肝病中心四科肝衰竭与人工肝治疗研究北京市重点实验室北京100069

目的阐述肝衰竭流行病学特征及其变化趋势,以期为肝衰竭防治策略提供循证依据。方法回顾性收集北京佑安医院2012年至2021年收治的肝衰竭住院患者流行病学信息,应用趋势检验分析其年龄、性别,以及急性肝衰竭(ALF)、亚急性肝衰竭(SALF)的... 详细信息

目的阐述肝衰竭流行病学特征及其变化趋势,以期为肝衰竭防治策略提供循证依据。方法回顾性收集北京佑安医院2012年至2021年收治的肝衰竭住院患者流行病学信息,应用趋势检验分析其年龄、性别,以及急性肝衰竭(ALF)、亚急性肝衰竭(SALF)的急性病因和慢加急性肝衰竭(ACLF)、慢性肝衰竭(CLF)的慢性肝病基础病因的逐年变化。结果在研究期间,共收集8512例肝衰竭住院患者信息,年龄为(51.3±13.5)岁,男性患者为主(71.9%),肝衰竭类型的比例从高到低依次为ACLF 4023例(47.3%)、CLF 3571例(42.0%)、SALF 670例(7.9%)、ALF 248例(2.9%)。肝衰竭整体人群中前5位的病因依次是乙型肝炎3199例(37.6%)、酒精性肝病2237例(26.3%)、隐源性肝病906例(10.6%)、乙型肝炎+酒精性肝病603例(7.1%)、药物488例(5.7%),共占比87.6%。不同类型肝衰竭患者的前3位病因分别是:ALF的急性病因,依次为药物107例(43.1%)、乙型肝炎47例(19.0%)、不明原因36例(14.5%),SALF的急性病因依次为药物381例(56.9%)、不明原因106例(15.8%)、脓毒症56例(8.4%);ACLF的慢性病因依次为乙型肝炎2092例(52.0%)、酒精性肝病813例(20.2%)、隐源性肝病398例(9.9%);而CLF的慢性病因依次是酒精性肝病1410例(39.5%)、乙型肝炎1028例(28.8%)、隐源性肝病364例(10.2%)。纵向分析显示肝衰竭患者的平均年龄逐年增加,性别比例未见显著变化趋势,始终以男性患者为主;在ALF、SALF患者中药物性肝衰竭比例逐年升高,趋势检验差异有统计学意义(P<0.05)。在ACLF、CLF患者的慢性病因中,乙型肝炎比例逐年下降,而酒精性肝病、自身免疫性肝病、隐源性肝病的比例逐年增加(P<0.05)。结论我国肝衰竭病因谱正在发生改变,尽管乙型肝炎仍然是肝衰竭的主要病因,但其占比呈现逐年减少趋势,除ACLF外,已不再是其他类型肝衰竭的首要病因,而药物性肝病、酒精性肝病、自身免疫性肝病、隐源性肝病呈逐年增加,将成为未来肝病防治的重点。

关键词：急性肝衰竭亚急性肝衰竭慢加急性肝衰竭慢性肝衰竭病因流行病学

Electrocatalytic water splitting:Mechanism and electrocatalyst design

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Nano Research 2023年第7期16卷 9142-9157页

作者： Han wu Qiaoxian huang Yuanyuan Shi Jiangwei Chang Siyu Lu Green Catalysis Center College of ChemistryZhengzhou UniversityZhengzhou 450001China

Hydrogen energy,a new type of clean and efficient energy,has assumed precedence in decarbonizing and building a sustainable carbon-neutral ***,hydrogen production from water splitting has seen considerable advancements owing to its advantages such as zero carbon emissions,safety,and high product *** overcome the large energy barrier and high cost of water splitting,numerous efficient electrocatalysts have been designed and ***,various difficulties in promoting the industrialization of electrocatalytic water splitting ***,as high-performance electrocatalysts that satisfy industrial requirements are urgently needed,a better understanding of water-splitting systems is *** this paper,the latest progress in water electrolysis is reviewed,and experimental evidence from in situ/operando spectroscopic surveys and computational analyses is summarized to present a mechanistic understanding of hydrogen and oxygen evolution ***,some promising strategies,including alloying,morphological engineering,interface construction,defect engineering,and strain engineering for designing and synthesizing electrocatalysts are *** believe that this review will provide a knowledge-guided design in fundamental science and further inspire technical engineering developments for constructing efficient electrocatalysts for water splitting.

关键词： water splitting mechanism operando spectroscopy design strategy

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IFE的发展综述及其设计研究

艺术科技 2024年第1期37卷 130-132,140页

作者：吴柏辰徐江华上海工程技术大学上海201620

目的:梳理IFE的发展现状,分析IFE国内外研究的情况,明确IFE研究存在的问题。方法:通过阅读文献、查阅相关网站了解IFE,利用中国知网数据库、科学引文索引数据库为研究提供数据支持,使用CiteSpace软件生成文献信息图,可视化呈现相关数据... 详细信息

目的:梳理IFE的发展现状,分析IFE国内外研究的情况,明确IFE研究存在的问题。方法:通过阅读文献、查阅相关网站了解IFE,利用中国知网数据库、科学引文索引数据库为研究提供数据支持,使用CiteSpace软件生成文献信息图,可视化呈现相关数据,分析国内外有关IFE文献的研究机构以及关键词。结果:国内外相关研究发展平缓,研究数量较少,未出现突破性进展和发现;国内研究少于国外研究,且未出现如国外高校将研究成果应用于生产实践的情况;国内研究机构大多为高校与企业,机构间合作较少;国内研究关注交互设计、空乘人员、无线网络、汽车交互和网络安保;国外研究机构会出现高校与公司合作的情况,研究关键词为舒适度提升策略、电视、不舒适、服务质量以及顾客满意度。结论:国内IFE研究存在的问题主要为校企合作较少,理论研究与生产实践未有效结合。

关键词： IFE 机上娱乐系统 CiteSpace 可视化分析

Piezocatalytic performance of Fe_(2)O_(3)−Bi_(2)MoO_(6) catalyst for dye degradation

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Frontiers of Chemical Science and Engineering 2023年第6期17卷 716-725页

作者： Lili Cheng Xiaoyao Yu Danyao huang Hao Wang Ying wu Key Laboratory of the Ministry of Education for Advanced Catalysis Materials School of Chemistry and Materials ScienceZhejiang Normal UniversityJinhua 321004China

A Fe_(2)O_(3)−Bi_(2)MoO_(6) heterojunction was synthesized via a hydrothermal *** electron microscopy,transmission electron microscopy,energy-dispersive X-ray,powder X-ray diffraction,Fourier transform infrared spectroscopy and ultra-violet−visible near-infrared spectrometry were performed to measure the structures,morphologies and optical properties of the as-prepared *** various factors that affected the piezocatalytic property of composite catalyst were *** highest rhodamine B degradation rate of 96.6%was attained on the 3% Fe_(2)O_(3)−Bi_(2)MoO_(6) composite catalyst under 60 min of ultrasonic *** good piezocatalytic activity was ascribed to the formation of a hierarchical flower-shaped microsphere structure and the heterostructure between Fe_(2)O_(3) and Bi_(2)MoO_(6),which effectively separated the ultrasound-induced electron–hole pairs and suppressed their ***,a potential piezoelectric catalytic dye degradation mechanism of the Fe_(2)O_(3)−Bi_(2)MoO_(6) catalyst was proposed based on the band potential and quenching effect of radical *** results demonstrated the potential of using Fe_(2)O_(3)−Bi_(2)MoO_(6) nanocomposites in piezocatalytic applications.

关键词： piezocatalysis Fe_(2)O_(3)−Bi_(2)MoO_(6) dye decomposition ultrasonic vibration