检索结果-南通市图书馆

BOTTLENECKS IN PRODUCTION NETWORKS: AN OVERVIEW

在线全文

学校读者我要写书评

暂无评论

Journal of Systems Science and Systems Engineering 2005年第3期14卷 347-363页

作者： Yongcai wang qianchuan ZHAO Dazhong ZHENG Center for Intelligent and Networked Systems Department of Automation Tsinghua University Beijing P.R.China 100084

Bottlenecks, the key ingredients for improving the performances of the production networks, have been profoundly studied during the last decade. Yet, because of the complexity of the research results, there is still a significant gap between theory and practice. In this paper, we review various bottleneck definitions, detection methods and the asymptotic results and provide a practical guidance for recognizing and utilizing the bottlenecks in production networks. Queueing theory works as the mathematical foundation in our study. Various definitions of the bottlenecks are classified as either Performance in Processing （PIP） based or sensitivity based definitions, which reflect the preferences of the managers. Detection methods are surveyed closely based on the definitions. These methods are used to recognize the bottlenecks and to provide diagnosis results to managers. Comparisons show that different detection methods may lead to vastly different conclusions. The recognition of the bottlenecks has another advantage： the ultimate phenomena of the bottlenecks can greatly reduce the computation complexity in calculating the system performances. Bottlenecks based approximation and asymptotic results are studied to exhibit the contribution of bottlenecks in performance estimation and theoretical analysis.

关键词： Bottleneck definition bottleneck detection method asymptotic result queueing theory production network

碳达峰背景下光伏能源在既有建筑中的应用分析

在线全文

学校读者我要写书评

暂无评论

城市建筑 2024年第18期21卷 5-8页

作者：周汝贝董芝颖张磊方颜慧欣吴展辉农子强江东杰王乾川重庆建筑工程职业学院智能建造学院

当前我国既有建筑能耗巨大,碳排放比重高。在碳达峰背景下,光伏能源作为碳减排的有效技术手段之一备受关注。文章分析了光伏能源在既有建筑中应用的诸多优势,并指出在既有建筑中应用光伏以应对建筑结构安全性评估、减少对屋面防水层的... 详细信息

当前我国既有建筑能耗巨大,碳排放比重高。在碳达峰背景下,光伏能源作为碳减排的有效技术手段之一备受关注。文章分析了光伏能源在既有建筑中应用的诸多优势,并指出在既有建筑中应用光伏以应对建筑结构安全性评估、减少对屋面防水层的影响、注意光伏的最佳安装倾角和朝向、明确建筑的遮挡关系、做好夏天光伏组件的降温、预防雷击及光伏表面的清洁维护等需要注意的问题,确保既有建筑的光伏安全有效运行。

关键词：既有建筑光伏能源碳达峰

维普期刊数据库博看期刊

一种人凝血因子Ⅷ产品的临床前药物安全性评价

在线全文

学校读者我要写书评

暂无评论

中国输血杂志 2016年第1期29卷 46-49页

作者：牟蕾鲁涛王黔川李伟余伟成都蓉生药业有限责任公司四川成都610041

目的评价1种以新鲜冰冻血浆为原料制备的人凝血因子Ⅷ(FⅧ)产品的药物安全性。方法按照《中国药典》方法对小鼠和豚鼠腹腔注射FⅧ做异常毒性试验;采用体外试管法进行兔红细胞体外溶血试验;采用同体自身对照法进行兔血管刺激性试验;对F... 详细信息

目的评价1种以新鲜冰冻血浆为原料制备的人凝血因子Ⅷ(FⅧ)产品的药物安全性。方法按照《中国药典》方法对小鼠和豚鼠腹腔注射FⅧ做异常毒性试验;采用体外试管法进行兔红细胞体外溶血试验;采用同体自身对照法进行兔血管刺激性试验;对FⅧ制备过程的添加剂残留量进行毒理分析。结果小鼠和豚鼠经腹腔注射本品50%,豚鼠平均增加体重>20%;体外溶血试验在15、30、45min,60、120和180 min均未观察到兔红细胞溶血,也未见红细胞聚集;多次和单次静脉注射新西兰兔,除部分对照组和试验组动物出现由于给药时机械操作或反复给药引起的与本品无关的红斑和轻微血管扩张外,均未见明显异常;本品的铝残留量<30μg/L,抗-A抗-B血凝素均<1∶64,Tween-80残留量<100μg/m L、磷酸三丁酯残留量<10μg/m L、聚乙二醇残留量<0.5 g/L。结论该FⅧ产品经动物及体外的药理毒理试验和病毒安全性试验证明是安全的,可用于临床。

关键词：人凝血因子Ⅷ(FⅧ) 异常毒性试验溶血试验刺激性试验

在线全文

学校读者我要写书评

暂无评论

人凝血因子Ⅷ的溶血性和血管刺激性研究

国际生物制品学杂志 2015年第5期38卷 213-216页

作者：李伟牟蕾鲁涛王黔川余伟成都蓉生药业有限责任公司血浆蛋白研究室 610041

目的评估人凝血因子Ⅷ（human coagulation factorⅧ,hFⅧ）的溶血性和血管刺激性.方法以家兔为实验动物,对hFⅧ进行体外溶血和体内血管刺激性实验.结果在3h体外实验期间未观察到兔红细胞发生溶血和凝聚.当以40 IU/kg剂量的hFⅧ对家... 详细信息

目的评估人凝血因子Ⅷ（human coagulation factorⅧ,hFⅧ）的溶血性和血管刺激性.方法以家兔为实验动物,对hFⅧ进行体外溶血和体内血管刺激性实验.结果在3h体外实验期间未观察到兔红细胞发生溶血和凝聚.当以40 IU/kg剂量的hFⅧ对家兔进行静脉注射时,未观察到家兔耳缘静脉的血管刺激性反应.结论静脉注射推荐剂量的hFⅧ不会发生溶血和血管刺激反应.

关键词：因子Ⅷ 溶血血管刺激性

Using knowledge inference to suppress the lamp disturbance for fire detection

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Safety Science and Resilience 2021年第3期2卷 124-130页

作者： Kailai Sun qianchuan Zhao Xinwei wang Center for Intelligent and Networked Systems Department of AutomationBNRistTsinghua UniversityBeijingChina

Fire detection in buildings is crucial for people’s lives and *** temperature and smoke sen-sors have many disadvantages:the limited cover range;detection delays;the difficulty in distinguishing smoke and ***,research on convolutional neural networks(CNN)for fire image detection has become a hot ***,existing fire classification and object detection methods are often interfered with by flash-lights,red objects and the high-brightness background,resulting in a high false alarm ***,light and lamps often exist in *** address this issue,this paper focuses on introducing scene prior knowledge and causal inference mechanisms to suppress the lamp ***,we train the YoloV3 network to detect and recognize ***,to reduce the dataset bias,we mask the lamp regions with the pro-posed Local Grabcut segmentation ***,compared with direct fire classification methods,our proposed methods reduce about 34.6%false alarm rate based on InceptionV4 *** experimental results verify the effectiveness among different CNN architectures(Resnet101,Firenet,Densenet121).The code is online at https://***/kailaisun/fire-detection-without-lamp.

关键词： fire detection lamp prior knowledge causal inference convolutional neural networks

基于物联网的电梯远程监控系统的初步方案设计

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

中国电梯 2017年第3期28卷 25-26页

作者：侯琛赵千川王帅陈新会清华大学自动化系北京100084 江苏西德电梯有限公司江苏连云港222100

1系统的整体架构在日常生活中，电梯的使用频率高。在我国，电梯每日完成十几亿人次的运输量，在给人类带来便利的同时，也带来了诸多挑战。

关键词：远程监控系统电梯物联网设计使用频率运输量

A Multi-agent Based Evaluation Framework and Its Applications

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

IEEE/CAA Journal of Automatica Sinica 2014年第2期1卷 218-224页

作者： Jinlong wang qianchuan Zhao Haitao Li Center for Intelligent and Networked System Department of AutomationTsinghua University

The evaluation system is significant for assessment of technologies, experiments, energy cost and effectiveness, especially for the complicated engineering systems, such as energy systems, weapon systems and spacecraft systems. However, as engineering systems become more and more distributed and heterogeneous, evaluation frameworks need to be more universal,distributed and interactive. In this paper, we compare several typical evaluation frameworks and propose a novel evaluation framework based on multi-agent technology. We provide two case studies, indoor comfort system and technology assessment of spacecraft systems, respectively. The results show that the proposed framework can work efficiently.

关键词： Multi-agent systems Standards Indexes Measurement Robot sensing systems Data models Computer architecture

Research opportunities arising from control and optimization of smart buildings

在线全文

学校读者我要写书评

暂无评论

Control Theory and Technology 2017年第1期15卷 78-80页

作者： qianchuan ZHAO Department of Automation and TNList Tsinghua University Beijing 700084 China

Control and optimization plays an important role in automation science and engineering for buildings. The area is important due to the growing threat of global warming effects to the sustainable development of human society as a whole indicated by the Paris Climate Treaty and the fact the buildings account for about 40% of total energy consumption in US, for example [1].

关键词： optimization plays important

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

面向智能制革的自动配料系统应用分析

皮革科学与工程 2024年第2期34卷 30-36页

作者：唐猷成张龙杨乐周黔川王春华林炜四川大学轻工科学与工程学院四川成都610065

在皮革生产过程中需要使用多种皮革化工材料,精准控制其配比和用量,才能保证成品革的质量和不同批次皮革质量的稳定性。鉴于目前皮革化料的配料环节仍然依赖于传统的粗放式人工配料模式,文章结合制革行业的实际应用场景和功能需求,主要... 详细信息

在皮革生产过程中需要使用多种皮革化工材料,精准控制其配比和用量,才能保证成品革的质量和不同批次皮革质量的稳定性。鉴于目前皮革化料的配料环节仍然依赖于传统的粗放式人工配料模式,文章结合制革行业的实际应用场景和功能需求,主要从过程控制层和现场设备层两个层级出发,分析了自动配料系统在制革生产中的应用方案,旨在为制革用自动配料系统的开发和研制提供切实可行的参考依据。

关键词：制革行业智能制革自动配料系统应用分析

维普期刊数据库博看期刊