检索结果-南通市图书馆

环境科学导刊 2024年第3期43卷 27-30页

作者：孙大光于瀚洋庄琳吉林省环境科学研究院吉林长春130012

依据已完成的工业园区审核项目所取得的经验成果,结合全员参与、整体推进的园区审核思路,创新提出园区清洁生产审核目标设置方法——园企协同法,将园区整体目标与区内企业目标的设置结合起来,相互关联、相互支撑,共同组成园区清洁生产... 详细信息

依据已完成的工业园区审核项目所取得的经验成果,结合全员参与、整体推进的园区审核思路,创新提出园区清洁生产审核目标设置方法——园企协同法,将园区整体目标与区内企业目标的设置结合起来,相互关联、相互支撑,共同组成园区清洁生产审核目标。

关键词：清洁生产清洁生产审核工业园区清洁生产审核目标园企协同法

A review of carbon dioxide disposal technology in the converter steelmaking process

在线全文

学校读者我要写书评

暂无评论

International Journal of Minerals,Metallurgy and Materials 2020年第11期27卷 1421-1429页

作者： Rong Zhu Bao-chen han Kai Dong guang-sheng Wei School of Metallurgical and Ecological Engineering University of Science and Technology BeijingBeijing 100083China Beijing Key Laboratory of Research Center of Special Melting and Preparation of High-end Metal Materials University of Science and Technology BeijingBeijing 100083China

In last decade,the utilization of CO?resources in steelmaking has achieved certain metallurgical effects and the technology is *** this review,we summarized the basic reaction theory of CO2,the CO2 conversion,and the change of energy-consumption when CO2 was introduced in converter steelmaking *** the CO2-O2 mixed injection(COMI)process,the CO2 conversion ratio can be obtained as high as 80%or more with a control of the CO2 ratio in mixture gas and the flow rate of CO2,and the energy is saving and even the energy consumption can be reduced by 145.65 MJ/t under certain *** addition,a complete route of CO2 disposal technology is proposed combining the comparatively mature technologies of CO2 capture,CO2 compression,and liquid CO2 storage to improve the technology of CO2 *** results are expected to form a large-scale,highly efficient,and valuable method to dispose of CO2.

关键词： CO2 utilization carbon dioxide steelmaking enhanced stirring temperature control

How often should one update control and estimation:review of networked triggering techniques

在线全文

学校读者我要写书评

暂无评论

Science China(Information Sciences) 2020年第5期63卷 6-23页

作者： Zhiyong CHEN Qing-Long han Yamin YAN Zheng-guang WU School of Electrical Engineering and Computing University of Newcastle School of Software and Electrical Engineering Swinburne University of Technology Institute of Cyber-Systems and Control Zhejiang University

Management of resources is a constant topic in industrial systems. How to use minimum communication resources is of particular interest for control and estimation of networked systems. It raises the question for researchers in the field: how often should one update control and estimation? One of the most intelligent approaches is to trigger updates by events. In the literature, event-triggered control and estimation have been widely studied in the last decade. On one hand, events should be triggered sufficiently frequent to maintain system performance; on the other hand, the possibility of Zeno behavior caused by infinite frequency should be avoided. This review aims at revisiting some existing triggering techniques in a unified formulation, separated from system dynamics and control and estimation strategies. It brings readers better understanding of triggering mechanisms, the underlying technical challenges, and some promising future research topics.

关键词： event-triggered control event-triggered estimation networked systems Zeno behavior

A trinomial type of σ-LFSR oriented toward software implementation

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Science in China(Series F) 2007年第3期50卷 359-372页

作者： ZENG guang HE KaiCheng han WenBao Department of Applied Mathematics Information Engineering University Zhengzhou 450002 China

In this paper, we introduce a new type of feedback shift register based on words, called G-linear feedback shift register （σ-LFSR） which can make full use of the instructions of modern CPUs so that we can find good σ-LFSR with simple structure and fast software implementation. After analysis, we find a class of simple σ-LFSR with maximal period and give an algorithm of searching for those σ-LFSRs. As a result, we provide a new optional fast component in the design of modern wordbased stream ciphers.

关键词： finite field stream cipher σ-LFSR primitive polynomial fast software implementation

MiR-125a-5p Regulates Vitamin D Receptor Expression in a Mouse Model of Experimental Autoimmune Encephalomyelitis

在线全文

学校读者我要写书评

暂无评论

Neuroscience Bulletin 2020年第2期36卷 110-120页

作者： han-Chun Long Rui Wu Chun-Feng Liu Fei-Long Xiong Zu Xu dian He Yi-Fan Zhang Bing Shao Ping-An Zhang guang-Yin Xu Lan Chu Department of Neurology The Affiliated Hospital of Guizhou Medical UniversityGuiyang 550001China Department of Neurology The Second Affiliated Hospital of Soochow UniversitySuzhou 215008China Institute of Neuroscience Soochow UniversitySuzhou 215123China Department of Neurology The Affiliated Xingyi City Hospital of Guizhou Medical UniversityXingyi 562400China

Multiple sclerosis(MS)is a chronic and incurable autoimmune neurodegenerative disease of the central nervous *** the symptoms of MS can be managed by vitamin D3 treatment alone,this condition cannot be completely ***,there might be unknown factors capable of regulating the vitamin D receptor(VDR).Genome-wide analysis showed that miRNAs were associated with *** sought to determine the role and mechanism of action of miRNA-125a-5p and VDRs in a model of MS,mice with experimental autoimmune encephalomyelitis(EAE),which was induced by myelin oligodendrocyte glycoprotein 35–55 *** mice showed decreased mean body weight but increased mean clinical scores compared with vehicle or control *** inflammatory infiltration was found in the lumbosacral spinal cord of EAE *** addition,VDR expression was significantly lower while the expression of miR-125a-5p was markedly higher in the spinal ventral horn of EAE mice than in vehicle or control ***,activation of VDRs by paricalcitol or inhibition of miR-125a-5p by its antagomir markedly decreased the mean clinical scores in EAE ***,VDR and miR-125a-5p were co-localized in the same neurons of the ventral *** importantly,inhibition of miR-125a-5p remarkably blocked the decrease of VDRs in EAE *** results support a critical role for miR-125a-5p in modulating VDR activity in EAE and suggest potential novel therapeutic interventions.

关键词： Multiple sclerosis Experimental autoimmune encephalomyelitis Vitamin D receptor MiR-125a-5p Myelin oligodendrocyte glycoprotein 35-55 peptides

在线全文

学校读者我要写书评

暂无评论

激光清洗Q345钢表面氧化层的数值模拟

激光与红外 2024年第1期54卷 31-39页

作者：赵子康杨文光宋春霄申俊伟彭珍珍汪殿龙河北科技大学材料科学与工程学院河北省材料近净成形技术重点实验室河北石家庄050018

为了探索激光搭接率和激光平均功率等物理参数在激光清洗时对Q345钢表面氧化层温度场分布和烧蚀深度的影响。本文针对钢铁产业工程中常用材料Q345钢表面的氧化层开展激光清洗过程模拟研究。首先对Q345钢表面氧化层进行物理化学性质分析... 详细信息

为了探索激光搭接率和激光平均功率等物理参数在激光清洗时对Q345钢表面氧化层温度场分布和烧蚀深度的影响。本文针对钢铁产业工程中常用材料Q345钢表面的氧化层开展激光清洗过程模拟研究。首先对Q345钢表面氧化层进行物理化学性质分析,从而建立氧化物和基体的激光清洗分层模型。接下来借助COMSOL Multiphysics软件,将Q345钢激光清洗模型进行网格划分和瞬态研究,并用实验来验证,从而得出激光参数对清洗温度场和清洗深度的影响。结果表明光斑搭接率对温度场影响不大,但随着搭接率的提高,烧蚀深度越深。而激光平均功率越大,温度场峰值越高,烧蚀深度也显著加深。该研究结果可为激光清洗氧化层的工艺研究提供理论参考。

关键词：激光技术激光清洗有限元模拟 Q345钢温度场烧蚀深度

Comparison of Metal Dusting Behavior of Several Alloys

在线全文

学校读者我要写书评

暂无评论

Journal of Iron and Steel Research International 2004年第3期11卷 48-52页

作者： han guang-wei DENG Bo FENG Di Central Iron and Steel Research Institute

A comprehensive study on the mechanical behavior of foamed metals was demonstrated. The relationship among their mechanical properties,preparation method,porosity and the structure was briefly studied as well.

关键词： foamed metal porous material porous metal cellular solid

Subluminal and Superluminal Phenomena in a Four-Level Atom

在线全文

学校读者我要写书评

暂无评论

Communications in Theoretical Physics 2008年第7期50卷 197-200页

作者： han Ding-An ZENG Ya-guang CAO Hui Physics Department Foshan University Foshan 528000 China

In a four-level atomic system, we investigate the light pulse propagation properties interacting with only one laser field. It is shown that in the steady state, the group velocity of the light pulse can be changed from subluminal to superluminal by varying the field detuning. Meanwhile, the effects of the field intensity on the group velocity are also shown. At last, with special parameters, the analytical solution for the group index is also obtained.

关键词： superluminal subluminal

基于改进模糊C-均值聚类的陆上风电场集电线路回路划分与拓扑结构优化

在线全文

学校读者我要写书评

暂无评论

发电技术 2024年第4期45卷 675-683页

作者：易海吕宙安张伶俐陈希柳典黄雨薇韩星星许昌中国三峡新能源(集团)股份有限公司北京市西城区101100 河海大学能源与电气学院江苏省南京市211100

【目的】在“双碳”目标以及我国能源结构加速转型的双重驱动下,风电产业规模不断快速增长,亟须降本增效以应对平价上网压力。集电线路的造价在投资中占比较大,存在可观的优化空间。为了降低投资成本,提出了一种改进模糊C-均值(fuzzy C-... 详细信息

【目的】在“双碳”目标以及我国能源结构加速转型的双重驱动下,风电产业规模不断快速增长,亟须降本增效以应对平价上网压力。集电线路的造价在投资中占比较大,存在可观的优化空间。为了降低投资成本,提出了一种改进模糊C-均值(fuzzy C-means,FCM)聚类算法。【方法】利用改进FCM聚类算法对陆上风电场集电线路回路进行划分。该算法综合考虑了方位角与欧式距离,以保障回路间线路不交叉,并使相邻机组聚集到同一回路;引入机位到聚类中心距离的修正因子,通过调节其数值限制回路容量。在回路划分的基础上,利用动态Prim算法对各回路进行集电线路优化选线。最后,通过某陆上风电场算例验证方法的有效性。【结果】与只考虑方位角的聚类方法相比,考虑方位角和间距的改进FCM算法优化效果更好,单回、双回连接对应的集电线路总造价分别降低了2.6%和5.4%。【结论】所提算法能够有效降低集电线路的总造价,具有一定的应用价值,可为风电场集电线路设计提供参考。

关键词：陆上风电场集电线路拓扑结构优化模糊C-均值(FCM)聚类算法动态Prim算法

Influence of Aging Treatment on Precipitation Behavior of η Phase in Ni-Co-Cr Alloy

在线全文

学校读者我要写书评

暂无评论

Journal of Iron and Steel Research International 2010年第1期17卷 64-69,78页

作者： WAN Wen-juan han guang-wei DENG Bo Department of High Temperature Materials Research Central Iron and Steel Research Institute Beijing 100081 China

The influence of aging treatment on precipitation behavior of η phase in a new Ni-Co-Cr fastener superalloy, AEREX350, was investigated by means of optical microscopy, scanning electron microscopy （SEM） and transmission electron microscopy （TEM）. The precipitation behavior of η phase with two kinds of morphologies in this material was found to be sensitive to the temperature and time of aging treatment. Time-temperature-transformation curves of these two η phase were achieved. Furthermore, diffraction patterns revealed the semi-coherent orientation relationship between η phase and γ matrix. This approach may be used to optimize the microstructure of the alloy for excellent mechanical properties.

关键词： precipitation η phase aging