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Energy flexibility characteristics of centralized hot water system in university dormitories

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Building Simulation 2023年第4期16卷 641-662页

作者： Zhiqin Rao shuqin chen Isaac Lun Lizhi Shen Ang Yu Huijun Fu College of Civil Engineering and Architecture Zhejiang UniversityHangzhou 310012China Center for Balance Architecture Zhejiang UniversityHangzhou 310012China Department of Architecture and Built Environment University of Nottingham Ningbo ChinaNingbo 315100China Department of General Affairs Zhejiang UniversityHangzhou 310012China

The large-scale application of renewable energy is an important strategy to achieve the goal of carbon neutrality in the building *** flexibility is essential for ensuring balance between energy demand and supply when targeting the maximum penetration rate of renewable energy during the operation of regional integrated energy *** the energy flexibility characteristics of centralized hot water systems,which are an important source of such flexibility,is of great significance to the optimal operation of regional integrated energy ***,in this study,based on the annual real-time monitoring data,the energy flexibility of the centralized hot water system in university dormitories is evaluated from the perspective of available storage capacity(C_(ADR)),recovery time(t_(recovery)),and storage efficiency(η_(ADR)),by the data-driven simulation *** factors influencing the energy flexibility of the centralized hot water system are also *** storage capacity has a strong positive correlation with daily water consumption and a strong negative correlation with daily mean outdoor *** associations indicate that increased water use on the energy flexibility of the centralized hot water system is conducive to optimal *** contrast,higher outdoor temperature is *** hourly mean value of the available storage capacity in spring and winter is found to be around 80 kWh in the daytime,and about twice that in summer and *** time is evenly distributed throughout the year,while t_(recovery)/C_(ADR)in spring and winter is about half that in *** storage efficiency was significantly higher in spring,summer,and winter than in *** hourly mean storage efficiency was found to be about 40%in the *** benefits of activating energy flexibility in spring and winter are the best,because these two seasons have higher available storage capacity and storage efficiency,while the benefit

关键词： energy flexibility centralized hot water system university dormitory back propagation(BP)neural network

Integration of flexible,recyclable,and transient gelatin hydrogels toward multifunctional electronics

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Journal of Materials Science & Technology 2023年第14期145卷 83-92页

作者： Rui Yin chen Zhang Jian Shao Youyou chen Ao Yin Qiang Feng shuqin chen Fei Peng Xing Ma cheng-Yan Xu Feihua Liu Weiwei Zhao Sauvage Laboratory for Smart Materials School of Materials Science and EngineeringHarbin Institute of Technology(Shenzhen)Shenzhen 518055China Shenzhen Key Laboratory of Flexible Printed Electronics Technology Harbin Institute of Technology(Shenzhen)Shenzhen 518055China State Key Laboratory of Advanced Welding&Joining Harbin Institute of TechnologyHarbin 150001China

Facing the challenges posed by exponentially increasing e-waste,the development of recyclable and tran-sient electronics has paved the way to an environmentally-friendly progression strategy,where electron-ics can disintegrate and/or degrade into eco-friendly end products in a controlled *** polymers possess cost and energy efficiency,easy modification,and fast degradation,all of which are ideal prop-erties for transient *** is especially attractive due to its unique thermoreversible gelation processes,yet its huge potential as a multifunctional electronic material has not been well-researched due to its limited mechanical strength and low ***,we explored versatile applications of gelatin-based hydrogels through the assistance of multifunctional additives like carbon nanotubes to enhance their electromechanical *** optimized gelatin hydrogel displays not only a high conductivity of 0.93 S/m,electromagnetic shielding effectiveness of 39.6 dB,and tensile stress tolerance of 263 kPa,but also shows a negative permittivity phenomenon,which may find versatile applications in novel *** a proof of concept,hydrogels were assembled as wearable sensors to sensitively de-tect static and dynamic pressures and strains generated by solids,liquids,and airflow,as well as diverse body ***,the recyclability,biocompatibility,and degradability of gelatin-based hy-drogels were well studied and *** work outlines a facile method to design multifunctional transient materials for wearable,sustainable,and eco-friendly electronics.

关键词： Gelatin hydrogels Carbon nanotubes Negative permittivity Electromagnetic interference shielding Wearable sensor

Design on Vibration Monitoring and Fault Diagnosis System of Large Water Pump Motor

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International Journal of Plant Engineering and Management 2021年第2期26卷 118-128页

作者： WEI Xieben LU Xujin LI Tongbin chen shuqin Shantou Polytechnic Shantou 515000GuangdongChina Jieyang Polytechnic Jieyang 522000GuangdongChina Jieyang DALI Mould Factory Co. Ltd.Jieyang 522000GuangdongChina

Large water pump motor,whose operation decides the reliability of the whole production line,plays a very important ***,its online condition monitoring can help companies better know its operation,process fault analysis and *** essay mainly studies and designs large water pump motor′s real time vibration monitoring and fault diagnosis *** essay completes the systems project design,the establishment of the system and performance ***-currentsensor,XM-120 vibration module,XM-320 axial translation module,XM-362 temperature module,XM-360 process amount module and XM-500 gateway module are used to measure the axial vibration and displacement of main *** tests prove that the system can meet the requirements of motor vibration monitoring.

关键词： large water pump motor vibration monitoring real-time monitoring fault diagnosis test

Study on Spatial Distribution of OM, N, P in Surface Soil around Lake Chaohu

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Journal of Water Resource and Protection 2013年第6期5卷 585-590页

作者： Ronggui Fan Changchun Wang Zhaosheng Chu shuqin chen Anqing Normal College Anqing China Chinese Research Academy of Environmental Sciences Beijing China College of Environmental Sciences and Engineering Liaoning Technical University Fuxin China

The concentration of total nitrogen (TN), total phosphorus (TP) and organic material (OM) at sixty grid division in Lake Chaohu basin around the lake was studied, in order to investigate their spatial distribution characteristics. The results showed that the average concentrations of TN, TP and OM were 1027 mg/kg, 483 mg/kg, 1.95%, and their concentrations ranged from 253 mg/kg to 2273 mg/kg, 223 mg/kg to 1173 mg/kg and 0.291% to 5.48%, respectively. The high concentration areas were located at the basins of Tuogao river and Zhao river while the low concentration areas were located at basins of Pai river, Nanfei river and Dianpu river. The concentrations of TN and OM were higher in East part than in West part. The spatial distribution of TN, TP and OM concentrations of the surface soil showed inconsistent with those of the water quality of the inflow rivers and the lake and the TN and TP of lake sediment studied.

关键词： Chaohu Lake Soil Total Nitrogen Total Phosphorus Organic Material Spatial Distribution

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应用视觉显著性的小提花织物疵点检测

纺织学报 2016年第12期37卷 38-42,48页

作者：李敏崔树芹陈佳武汉纺织大学数学与计算机学院湖北武汉430072

为实现小提花织物的疵点检测,提出了一种基于视觉显著性的疵点定位与分割方法。针对小提花织物的花型具有周期性的特点,通过对织物图像进行快速傅里叶变换和形态滤波来抑制正常花纹的显著性,突出疵点区域的显著性,以获取图像的全局显著... 详细信息

为实现小提花织物的疵点检测,提出了一种基于视觉显著性的疵点定位与分割方法。针对小提花织物的花型具有周期性的特点,通过对织物图像进行快速傅里叶变换和形态滤波来抑制正常花纹的显著性,突出疵点区域的显著性,以获取图像的全局显著图;然后使用基于图论的视觉显著模型来计算图像的局部显著图,并对全局和局部显著图进行合并生成综合显著图;最后使用最大熵法对综合显著图进行分割,以得到疵点目标。实验结果表明,在对横裆、破洞、断头、打结和跳花等5种瑕疵进行测试时,该方法的正确率高达93.5%,非常适合于对小提花织物进行疵点检测。

关键词：小提花织物疵点检测视觉显著性最大熵法

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基于自适应柔顺控制的航天器部件装配

清华大学学报（自然科学版） 2023年第11期63卷 1808-1819页

作者：陈书清李铁民清华大学机械工程系北京100084

利用机器人技术完成航天器部件的装配任务,是中国航天领域的研究重点。仅依靠位置控制完成装配任务时,装配误差的存在会导致航天器部件存在较大的接触力,从而破坏航天器部件的表面质量和表面涂层,进而影响航天器部件的服役寿命。因此,... 详细信息

利用机器人技术完成航天器部件的装配任务,是中国航天领域的研究重点。仅依靠位置控制完成装配任务时,装配误差的存在会导致航天器部件存在较大的接触力,从而破坏航天器部件的表面质量和表面涂层,进而影响航天器部件的服役寿命。因此,在装配过程中需要使用柔顺控制来调控接触力。目前,在机器人装配中应用的柔顺控制方法需要依据经验设定控制参数,而2个装配体之间的接触力与控制参数密切相关,这会导致接触力不可控。为避免接触力过大,该文提出了一种柔顺控制方法,通过装配过程中的接触力和状态信息,根据不同环境刚度自适应地调整柔顺控制的目标位置和控制参数。为了验证此方法的可行性,该文进行了仿真和实验研究,并与位置控制和经典的导纳控制进行比较,实验结果表明:该文提出的方法具有收敛速度快、残余接触力小、可自动调节控制参数等优势。该方法为航天器部件的机器人自主装配奠定了理论和技术的基础,并有望应用于实际航天器部件装配任务中。

关键词：自适应柔顺控制航天器部件机器人装配接触力

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应用层次聚类分析法确定海菜花氨氮耐受阈值

环境科学研究 2016年第4期29卷 529-537页

作者：陈书琴储昭升安庆师范学院资源与环境科学学院安徽安庆246011 中国环境科学研究院湖泊研究中心北京100012

为确定海菜花对NH_4^+-N的Nmtor(耐受阈值),通过不同水平ρ(NH_4^+-N)下的模拟试验,获得了30 d内各试验组海菜花生化指标〔SOD(超氧化物歧化酶)活性、POD(过氧化物酶)活性、CAT(过氧化氢酶)活性及MDA(丙二醛)含量〕及生长指标〔鲜质量... 详细信息

为确定海菜花对NH_4^+-N的Nmtor(耐受阈值),通过不同水平ρ(NH_4^+-N)下的模拟试验,获得了30 d内各试验组海菜花生化指标〔SOD(超氧化物歧化酶)活性、POD(过氧化物酶)活性、CAT(过氧化氢酶)活性及MDA(丙二醛)含量〕及生长指标〔鲜质量、最长根长、w(Chla)〕,运用层次聚类分析法确定了海菜花对NH_4^+-N的Nmtor,并运用传统方法对生长指标予以分析,以验证层次聚类分析法的有效性和可靠性.结果表明:1对海菜花SOD活性、CAT活性及MDA含量的层次聚类分析得到的海菜花对NH_4^+-N的Nmtor皆为0~3.0 mg/L,而由POD活性分析得到的Nmtor为0~8.0 mg/L,交集为0~3.0 mg/L;2根据鲜质量相对增长率、根长相对增长率、w(Chla)得到的海菜花对NH_4^+-N的Nmtor分别为0~4.0、0~8.0及0~3.0 mg/L,交集为0~3.0 mg/L;3大多数生化指标层次聚类分析结果相同,而通过生长指标结合试验现象分析所得结果则各有差异,层次聚类分析结果是生长指标分析结果的真子集.

关键词：海菜花氨氮耐受阈值层次聚类分析法

温肺祛痰散对稳定期慢性阻塞性肺疾病患者外周血T淋巴细胞、血清IL-2及sIL-2R的影响

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陕西中医 2025年第1期46卷 60-63页

作者：朱海燕陈淑琴周琴张家港市中医医院江苏张家港215600

目的:观察温肺祛痰散对稳定期慢性阻塞性肺疾病(COPD)患者外周血T淋巴细胞、血清白细胞介素-2(IL-2)及可溶性白细胞介素-2受体(sIL-2R)的影响,为临床治疗提供参考。方法:选取痰浊阻肺型稳定期COPD患者60例,采用随机数字表法分为两组,每... 详细信息

目的:观察温肺祛痰散对稳定期慢性阻塞性肺疾病(COPD)患者外周血T淋巴细胞、血清白细胞介素-2(IL-2)及可溶性白细胞介素-2受体(sIL-2R)的影响,为临床治疗提供参考。方法:选取痰浊阻肺型稳定期COPD患者60例,采用随机数字表法分为两组,每组30例。两组患者均给予缩唇腹式呼吸。对照组给予噻托溴铵治疗,观察组给予噻托溴铵+温肺祛痰散治疗。记录两组治疗前、治疗后中医症候积分、咳嗽评分、生活质量评分及外周血T淋巴细胞、血清IL-2、sIL-2R水平变化,并记录两组疗效和COPD急性发作次数。结果:观察组治疗8周总有效率高于对照组,随访6个月内COPD急性发作次数少于对照组(P<0.05);治疗后两组生活质量评分、CD3^(+)、CD4^(+)、CD4^(+)/CD8^(+)、IL-2升高(P<0.05),中医症候积分、咳嗽评分、CD8^(+)、sIL-2R降低(P<0.05),观察组生活质量评分、CD3^(+)、CD4^(+)、CD4^(+)/CD8^(+)、IL-2高于对照组(P<0.05),中医症候积分、咳嗽评分、CD8^(+)、IL-2、sIL-2R低于对照组(P<0.05)。结论:温肺祛痰散可提高稳定期COPD患者免疫功能,调节血清IL-2及sIL-2R的表达,改善症状,提高生活质量。

关键词：慢性阻塞性肺疾病温肺祛痰散缩唇腹式呼吸痰浊阻肺型稳定期外周血T淋巴细胞生活质量

基于激光谐波调制的深孔内壁三维面型分析系统

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红外与激光工程 2022年第3期51卷 228-233页

作者：李耀明陈淑琴张煌中北大学机械工程学院山西太原030051 中北大学理学院山西太原030051

为了快速精确地获取深孔结构内壁三维面型,从而分析深孔加工质量,提出了一种基于激光谐波调制的线型扫描系统,设计了可深入深孔结构的反射式光学系统。研究了通过时间窗滤波的谐波匹配点云优化算法,该算法利用谐波调制相位范围对近轴线... 详细信息

为了快速精确地获取深孔结构内壁三维面型,从而分析深孔加工质量,提出了一种基于激光谐波调制的线型扫描系统,设计了可深入深孔结构的反射式光学系统。研究了通过时间窗滤波的谐波匹配点云优化算法,该算法利用谐波调制相位范围对近轴线扫描区域进行阈值分离,从而完成点云数据的滤波。实验针对三种不同类型的深孔进行了测试,并采用Handyscan三维成像仪进行了点云数据对比。文中对5 cm×5 cm的内壁区域进行了量化分析,对比了优化前后的三维点云图像。优化前的点云中明显包含很多杂散点,综合平均偏差为0.53 mm,而采用优化后,噪声被有效抑制,综合平均偏差降为0.12 mm。在x轴方向上,系统位置偏差均值为0.240 mm,在y轴方向上,系统位置偏差均值为0.228 mm。由于优化后降低了需要计算的点云总量,故其收敛速度也有一定的改善,在3 000点以上趋于稳定,约为优化前用时的65.8%。可见该系统适用于深孔内壁三维面型检测,为深孔测试与数据降噪提供了新的思路。

关键词：激光成像深孔测试谐波调制阈值降噪