检索结果-南通市图书馆

自动化学报 2001年第3期27卷 411-416页

作者：胡健谭民中国科学院自动化研究所北京100080

用并行结构实现多机器人协调系统的控制任务是多机器人协调系统研究的重要内容之一 .文中提出了一种新型多 DSP并行结构机器人控制器的思想 ,阐述了系统的硬、软件结构 ,并对系统的主要性能进行了分析。

关键词：多机器人协调机器人控制器数字信号处理器并行结构 CMRC DSP

Beijing Jeep Takes Thirty Years in One Step

在线全文

学校读者我要写书评

暂无评论

China Today 1995年第1期44卷 28-30页

作者： $$$$staff reporter tan min

ＢｅｉｊｉｎｇＪｅｅｐＴａｋｅｓＴｈｉｒｔｙＹｅａｒｓｉｎＯｎｅＳｔｅｐＢｙｓｔａｆｆｒｅｐｏｒｔｅｒＴＡＮＭＩＮＴＨＥＦＩＲＳＴｆｏｕｒ－ｗｈｅｅｌｄｅｉｖｅ，ｃｒｏｓｓ－ｃｏｕｎｔｒｙｖｅｈｉｃｌｅｉｎｔｈｅｗｏ... 详细信息

ＢｅｉｊｉｎｇＪｅｅｐＴａｋｅｓＴｈｉｒｔｙＹｅａｒｓｉｎＯｎｅＳｔｅｐＢｙｓｔａｆｆｒｅｐｏｒｔｅｒＴＡＮＭＩＮＴＨＥＦＩＲＳＴｆｏｕｒ－ｗｈｅｅｌｄｅｉｖｅ，ｃｒｏｓｓ－ｃｏｕｎｔｒｙｖｅｈｉｃｌｅｉｎｔｈｅｗｏｒｌｄ－ｔｈｅｊｅｅｐ－ｗａｓ１９...

关键词： Beijing Jeep Takes Thirty Years in One Step

QUANTITATIVE CHARACTERIZATION OF CROSS-SECTION SHAPE OF DUMBBELL-LIKE FIBER BY IMAGE ANALYSIS

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

QUANTITATIVE CHARACTERIZATION OF CROSS-SECTION SHAPE OF DUMB...

第十一届北京分析测试学术报告会暨展览会(BCEIA 2005)

作者： Zhengmin LI min tan Laboratory & Equipment Management Department Shandong University of Technology College of Physics Shandong University of Technology

Compared with circle cross-section fiber,dumbbell-like one has many special properties,such as *** cross-section shape has closely relationship with fiber properties and technique to produce ***,cross-section shape of fiber was qualitatively observed by *** profiled degree has been proposed and used to represent the degree

关键词：

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

可变生产率的两级串行生产线可靠性分析

控制理论与应用 2000年第2期17卷 255-258,239页

作者：孙钰谭民中国科学院自动化研究所复杂系统工程学开放实验室北京100080

制造系统的生产线由多个机器组合而成 ,可以有多种表现形式 ,各机器可以根据生产的实际情形改变生产率 .从系统可靠性的角度出发 ,当机器以较低的生产率工作时可靠性较高 .这样 ,提出一种能提高系统可靠性同时又能使各机器相互协调而提... 详细信息

制造系统的生产线由多个机器组合而成 ,可以有多种表现形式 ,各机器可以根据生产的实际情形改变生产率 .从系统可靠性的角度出发 ,当机器以较低的生产率工作时可靠性较高 .这样 ,提出一种能提高系统可靠性同时又能使各机器相互协调而提高生产线性能的策略就显得十分必要 .本文讨论了可变生产率的串行生产线模型 ,对机器、缓冲区及生产线的运行状态进行了研究 ,从机理上分析了生产线的运行状况 ,得到了分析生产线性能指标的解析解 :稳态生产率 ,并以稳态生产率为指标对这种生产线加以控制 ,从而进行优化 .

关键词：制造系统变生产率串行生产线可靠性分析

在线全文

学校读者我要写书评

暂无评论

旋转流体中的二维惯性重力波-涡相互作用

地球物理学报 2007年第4期50卷 1040-1052页

作者：王赟谈哲敏南京大学大气科学系中尺度灾害性天气教育部重点实验室南京210093

本文利用f-平面浅水模型讨论了二维情况下快速惯性重力波与平衡涡旋之间的相互作用问题.当快速的惯性重力波传入涡旋区域后,波-涡之间发生了相互作用,涡旋可被加深,涡旋区域的风场等可以出现非对称分布,当惯性重力波全部传出涡旋区域并... 详细信息

本文利用f-平面浅水模型讨论了二维情况下快速惯性重力波与平衡涡旋之间的相互作用问题.当快速的惯性重力波传入涡旋区域后,波-涡之间发生了相互作用,涡旋可被加深,涡旋区域的风场等可以出现非对称分布,当惯性重力波全部传出涡旋区域并远离之后,涡旋恢复到其初始状态,但此时惯性重力波可以出现非对称结构,这与一维情况不同.在波-涡发生相互作用过程中,其物理量变化的最大区域分布基本与波动传播方向一致,在波动进入或移出涡旋时,相对应存在两个最大物理量变化区域,此外,相互作用导致的物理量的最大变化与波动结构、强度、传播方向以及涡旋特性有关.非线性条件下的波-涡相互作用要强于线性过程.

关键词：惯性重力波涡旋相互作用旋转流体

Lentiviral vector-mediated down-regulation of IL-17A receptor in hepatic stellate cells results in decreased secretion of IL-6

在线全文

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 2012年第28期18卷 3696-3704页

作者： Sheng-Chu Zhang Yi-Hu Zheng Pan-Pan Yu tan Hooi min Fu-Xiang Yu Chao Ye Yuan-Kang Xie Qi-Yu Zhang Department of General Surgery The First Affiliated Hospital of Wenzhou Medical College Wenzhou 325000 Zhejiang Province China Stem Cell Center Lurid University 22184 LundSweden Department of Infectious Disease Binjiang Hospital of Hangzhou Hangzhou 310051 Zhejiang Province Ctaina

AIM: To investigate the mechanism of interleukin (IL)-6 secretion through blocking the IL-17A/IL-17A recepto (IL-17RA) signaling pathway with a short hairpin RNA (shRNA) in hepatic stellate cells (HSCs) in vitro . METHODS: HSCs were derived from the livers of adul male Sprague-Dawley rats. IL-6 expression was evalu ated using real-time quantitative polymerase chain reaction and enzyme linked immunosorbent assay. The phosphorylation activity of p38 mitogen activated pro tein kinases (MAPK) and extracellular regulated pro tein kinases (ERK) 1/2 upon induction by IL-17A and suppression by IL-17RA shRNA were examined using Western ***: IL-6 expression induced by IL-17A was significantly increased compared to control in HSCs (P min exposure, and showed the strongest levels of phosphorylation of p38 MAPK and ERK1/2 at 15 min in IL-17A-treated HSCs. IL-6 mRNA expression induced by IL-17A (100 ng/mL) for 3 h exposure was inhibited by preincubation with specific inhibitors of p38 MAPK (SB-203580) and ERK1/2 (PD-98059) compared to groups without inhibitors preincubation (1.67 ± 0.24, 2.01 ± 0.10 vs 4.08 ± 0.59, P min IL-17A (100 ng/mL) exposure. CONCLUSION: Down-regulation of the IL-17RA receptor by shRNA decreased IL-6 expression induced by IL-17A via p38 MAPK and ERK1/2 phosphorylation in HSCs. Suppression of IL-17RA expression may be a strategy to reduce the inflammatory response induced by IL-17A in the liver.

关键词： Interleukin 17A Interleukin 6 Hepatic stellate cells Liver fibrosis

Electroporation of embryonic chick skin explant

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Medicine in Novel Technology and Devices 2022年第4期16卷 386-389页

作者： Tailin Chen Wanjuan Bu Jun Guo Yuxiao Zhang min tan Jing Du Yubo Fan Key Laboratory of Biomechanics and Mechanobiology(Beihang University) Ministry of EducationBeijing Advanced Innovation Center for Biomedical EngineeringSchool of Biological Science and Medical EngineeringBeihang UniversityBeijing100083China

Since the introduction of electroporation a decade ago,the chick embryo has evolved into a powerful system for studying gene regulation and function during *** this is a straightforward method for embryos,skin(especially lamellar tissue)present special *** we describe a protocol for electroporation of expression vectors into the chick skin explant,with precise spatial and temporal *** have improved the design of the electroporation chamber,which can achieve precise regulation of the electroporation area by changing the parameters of the laser cutting of the acrylic *** give the electroporation parameters of chicken embryo skin,which can effectively improve the electroporation *** technique can be used for time-lapse imaging and to study gene regulation in chick embryo skin.

关键词： Electroporation Embryonic chick skin explant Electroporation chamber

Studies on Rare Earth Complexes with Crown Ether (ⅩⅩⅣ)——Synthesis and Characterization of Complexes of Lanthanide Isothiocyanates with Dibenzo-30-crown-10

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chemical Research in Chinese Universities 1992年第3期8卷 319-323页

作者： LU Tong-bu, GAN Xin-min, tanG Ning and tan min-yu (Department of Chemistry, Lanzhou University, Lanzhou, 730000)

Introduction The study of metal complexes with the crown ether is a quite interesting research field, but the research has mainly focused on the metal complexes with some crown ethers with a relatively small cavity such as 12-crown-4, 15-crown-5 and 18- crown-6 as well as their derivatives. Crown ethers with a larger cavity contain more oxygen atoms, so they have the ability to form the complexes of a higher co-

关键词： Lanthanide isothiocyanates Crown ethers Complexes Synthesis

一种仿生水下机器人的设计与动力学分析(英文)

在线全文

学校读者我要写书评

暂无评论

自动化学报 2013年第8期39卷 1330-1338页

作者： WEI Qing-Ping WANG Shuo DONG Xiang SHANG Liu-Ji tan min The State Key Laboratory of Management and Control for Complex Systems Institute of Automation Chinese Academy of Sciences Institute of Intelligent Machines Chinese Academy of Sciences

A biomimetic underwater vehicle propelled by two undulating long-fins is introduced in this paper. The concerned vehicle is propelled by two symmetrical undulating long-fins installed on both sides. Ten servo motors are employed to drive the long-fins and cosine wave function is employed for motor control. A real-time control system is designed for controlling the long-fins by adjusting its oscillating frequency and oscillating amplitude. An inertial measurement unit is installed to collect the accelerations and angular velocity. To obtain the relationship between oscillating frequency/amplitude and swimming performance, kinematic analysis and hydromechanic analysis are given. By dividing the long-fin into many small elements and computing the hydrodynamic force acting on each element, the instantaneous thrust generated by the long-fin is obtained. Then the average thrust of the long-fin is obtained by summing up the forces acted on the elements in one undulating period. Then swimming experiments are carried out to validate the vehicle design and kinematic analysis and hydromechanic analysis. And two swimming motion modes including marching and rotating locomotion are chosen. Finally, discussions between the swimming performance and the oscillating parameters are given.

关键词：水下机器人车辆设计动力学分析起伏仿生鳍计算流体动力学运动学分析

The Roles of Asymmetric Inflow Forcing Induced by Outer Rainbands in Tropical Cyclone Secondary Eyewall Formation

在线全文

学校读者我要写书评

暂无评论

The Roles of Asymmetric Inflow Forcing Induced by Outer Rain...