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Longitudinal Vibrations of Rheological Rodwith Variable Cross Section

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Communications in Nonlinear Science and Numerical Simulation 1999年第3期4卷 193-199页

作者： Katica (Stevanovic) HEDRIH Aleksandar FILIPOVSKI(Faculty of Mechanical Engineering, University of Nis, Mathematical Institute SANU,Belgrade).E-mail:katica@masfak.masfak.masfak.ni.ac.yu,katicav@kalca.junis.ni.ac.yu Faculty of Mechanical Engineering University of Nis Mathematical Institute SANU Belgrade Yugoslavia

IntroductionMechanicsofhereditarymedium(material)ispresentedinmuchscientificliteratured--41,anditiswidelyusedinengineeringanajysesofstreng'***... 详细信息

IntroductionMechanicsofhereditarymedium(material)ispresentedinmuchscientificliteratured--41,anditiswidelyusedinengineeringanajysesofstreng'***...

关键词： viscose-elasticity hereditary material longitudinal vibration eigenfunction. variable cross section

Detonation Propagation in Narrow Gaps with Various Configurations

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Journal of Thermal Science 2007年第3期16卷 283-288页

作者： M.Monwar ynu.ac.jp) Y.Yamamoto K.Ishii T.Tsuboi Department of Mechanical Engineering Yokohama National University79-5 TokiwadaiHodogaya-kuYokohama 240-8501Japan.(Email address:d05sb192

In general all detonation waves have cellular structure formed by the trajectory of the triple points. This paper aims to investigate experimentally the propagation of detonation in narrow gaps for hydrogen-oxygen-argon mixtures in terms of various gap heights and gap widths. The gap of total length 1500 mm was constructed by three pair of stainless plates, each of them was 500 mm in length, which were inserted in a detonation tube. The gap heights were varied from 1.2 mm to 3.0 mm while the gap widths were varied from 10 mm to 40 mm. Various argon dilution rates were tested in the present experiments to change the size of cellular structure. Attempts have been made by means of reaction front velocity, shock front velocity, and smoked foil to record variations of cellular structure inside the gaps. A combination probe composed of a pressure and an ion probe detected the arrival of the shock and the reaction front individually at one measurement point. Experimental results show that the number of the triple points contained in detonation front decreases with decrease in the gap heights and gap widths, which lead to larger cellular structures. For mixtures with low detonability, cell size is affected by a certain gap width although conversely cell size is almost independent of gap width. From the present result it was found that detonation propagation inside the gaps is strongly governed by the gap height and effects of gap width is dependent on detonability of mixtures.

关键词： Detonation cellular structure gap configuration triple point

Sediment Transport in Rivers with Overbank Flow

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四川大学学报（工程科学版） 2005年第S1期37卷 16-29页

作者： Donald W KNIGHT Water Eng. The Univ.of BirminghamUK

Some concepts related to sediment transport in rivers with overbank flow are *** a description of the physical processes that are involved when a river inundates its floodplains,some simple com- putational methods are presented which permit the depth-averaged velocity and boundary shear stress to be pre- dicted within a cross section of variable,but prismatic *** methoda account for the strong transverse shear in velocity that occurs when the stage is just above bankfull,as well as ...

关键词： sediment transport overbank flow

Performance analysis of QoS routing protocol for WiMedia networks

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Journal of Central South University 2012年第12期19卷 3468-3474页

作者： JUNG Jin-uk JIN Kyo-hong HWANG Min-tae JEON Young-ae Department of Electronics Engineering Changwon National UniversityChangwon 641-773Korea Department of Information Communication Changwon National UniversityChangwon 641-773Korea Green Converged Wireless Systems Research Team ETRIDaejeon 305-700Korea

Though the WiMedia supports higher data rates than other WPAN technologies,a WiMedia device cannot reach other devices that are separated from it by more than 10 m,which is the typical limited transmission range of the WiMedia *** this work,we propose a multi-hop QoS routing protocol to enable WiMedia devices to transmit real-time data to devices that are located out of the transmission *** proposed routing protocol is a hybrid algorithm,which mixes the table-driven and on-demand routing algorithms,searching one or more routes according to the number of hops to a destination *** Mac is potentially capable of learning the existence of neighbor devices by using a beacon *** utilizing the neighbors' information,all devices can create routing entries for devices within 2-hops *** devices beyond the 2-hop range,the newly designed on-demand routing algorithm is applied to multi-hop *** a routing entry for a destination device is not listed in the routing table,the source device sends a request packet to 2-hop range devices which could be found in the routing *** every device maintains routing entries for 2-hop range devices in the routing table,the request packet is replied in advance before its arrival at the destination ***,to decide the optimal route for a destination device,the number of medium access slots(MASs),received signal strength indicator(RSSI)and hop count are utilized to establish a QoS-enabled routing *** perform ns-2 simulation to investigate the performance of the proposed routing protocol with AODV and *** simulation results show that the proposed protocol has better throughput and lower overhead than other protocols.

关键词： WiMedia WPAN multi-hop routing protocol QoS hybrid routing protocol

SYNCONVERGENT, DUCTILE N-DIRECTED SHEARING ON THE WESTERN MARGIN OF THE NANGA PARBAT SYNTAXIS, N. PAKISTAN

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地学前缘 2000年第S1期7卷 128-129页

作者： Tom Argles 1, Mike Edwards 2, Gavin Foster 1(1 Department of Earth Science, The Open University, Walton Hall, Milton Keyn es MK7 6AA, uk, E\|mail: t.w.argles@open.ac.uk 2 Institut fur Geologie, TU Bergakademie Freiberg, Berhard\|von\|Cottastrasse

A key issue in orogenic research today is the recognition and explanation of normal faulting in the heart of collisional mountain belts. The active Himalayan system remains an ideal locality for studying this phenomenon, both as E—W synconvergent extension of the Tibetan plateau and normal motion on the South Tibetan Detachment System (STDS). However, these processes are difficult to correlate with the evolution of the northwest Himalaya, particularly the Nanga Parbat syntaxis where a Neogene tectono\|thermal overprint partially obscures the early collisional history. An integrated programme of structural mapping, petrography, thermobarometry and isotopic dating is presented that places important constraints on both the early\| and pre\|Himalayan evolution of the syntaxis. These data include evidence for synconvergent, ductile extension predating syntaxis development, and improved isotopic correlation of the tectonic units with the familiar central Himalayan thrust sheets, building on the work of Whittington et al (1999).Recent studies have focused on the rapid exhumation of the Nanga Parbat\|Haramosh Massif (NPHM) during the last 10Ma, and the related Neogene thermal effects dominating the core of the massif (e.g. Zeitler et al. 1982, 1993). However, the degree of both structural and metamorphic Neogene overprinting varies within the massif, becoming weaker away from the summit region. In addition, the considerable variation in rock\|type outside the gneissic core results in both strain partitioning and various degrees of metamorphic reworking. Thus several workers (e.g. Wheeler et al. 1995) could reconstruct elements of the early and pre\|Himalayan history from field relations and mineral assemblages virtually untouched by Neogene processes. The eastern margin of the massif, in contrast to the active western margin, has remained largely unchanged during the Neogene, except for essentially passive rotation on the limb of the major syntaxial antiform. The original,

关键词： synconvergent syntaxis extension Himalaya ductile exhumation Nanga Parbat

人参、白芍和紫河车混合提取物生血丹的生血作用

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acta Pharmacologica Sinica 2003年第2期24卷 120-126页

作者： dju.ac.kr Department of Internal Medicine College of Oriental Medicine Daejeon University Daejeon 301-724 Vaccine Institute Seoul National University Campus 151-742 Institute of Traditional Medicine and Bioscience Daejeon University 韩国 Daejeon 301-724

AIM: To examine the efficacy of Saenghyuldan and its components, Ginseng Radix, Paeoniae Radix Alba, and Hominis Placenta extracts (SHD, GR, PRA, and HP, respectively) on the hemopoiesis in a myelosuppression model system. METHODS: Susceptibility to cyclophosphamide (CP) and S 180 carcinoma was determined in SHD, GR,PRA, and HP-treated mice. Analysis of peripheral blood and bone marrow cells was demonstrated by changes in cell types and histopathologic examination. The expression of cytokine mRNAs involved in hemopoiesis was examined by RT-PCR. RESULTS: SHD and its seperated components (GR, HP, and PRA, respectively) significantly increased the survival in CP-and S 180-treated mice. The hematology data demonstrated that all the agents augmented monocyte and leucocyte counts in the peripheral blood and increased bone marrow density and the ratio of leukocyte to erythrocyte in the bone marrow. These findings were positively correlated with the up-regulation of cytokine mRNA expression such as granulocyte colony-stimulating factor (GM-CSF), erythropoietin (EPO), thrombopoietin (TPO), stem cell factor (SCF), and c-Kit. CONCLUSION: SHD is an effective remedy for the bone marrow failure and myelosuppression occurring during chemotherapy.

关键词：生血丹人参白芍紫河车血细胞生成

Restoration of common bile duct diameter within 2 weeks after endoscopic stone retraction is a preventive factor for stone recurrence

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Hepatobiliary & Pancreatic Diseases International 2018年第3期17卷 251-256页

作者： Jin Jeon Sung uk Lim Chang-Hwan Park Chung-Hwan Jun Seon-Young Park Jong-Sun Rew Department of Internal Medicine Chonnam National University Hospital Department of Internal Medicine Mokpo Hankook Hospital

Background： Little information is available about the relationship between restoration of common bileduct （CBD） diameter after endoscopic stone retraction and recurrence of CBD stones in elderly *** present study was to determine whether restoration of CBD diameter is a preventive factor for CBDstone recurrence in elderly patients who underwent endoscopic retrograde cholangiopancreatography（ERCP）.

关键词： Restoration Common bile duct Endoscopic retrograde cholangiopancreatography Common bile duct stone

Application of microdialysis in tissue engineering monitoring

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Progress in Natural Science:Materials International 2008年第5期18卷 503-511页

作者： Zhaohui Li, Zhanfeng Cui Department of Engineering Science, Oxford University, Oxford OX1 3PJ, uk Department of Engineering Science Oxford University Oxford OX1 3PJ UK

In this review article, the microdialysis for tissue engineering monitoring is discussed. Among various monitoring techniques, micro- dialysis is advantageous for its capacity of perfusion on-line, and o -line multiple parameter monitoring. Following a description on the general system and performance, the main challenges to apply this technique for reliable long term monitoring are outlined. Further opportunities are identi ed.

关键词： Microdialysis Tissue culture monitoring Tissue engineering

SnO_(2)/Graphene Composite with High Lithium Storage Capability for Lithium Rechargeable Batteries

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Nano Research 2010年第11期3卷 813-821页

作者： Haegyeom Kim Sung-Wook Kim Young-uk Park Hyeokjo Gwon Dong-Hwa Seo Yuhee Kim Kisuk Kang Graduate School of Energy EnvironmentWaterand SustainabilityKorea Advanced Instituteof Science and Technology(KAIST)335 GwahangnoYuseong-guDaejeon 305-701Republic of Korea Department of Materials Science and Engineering KAIST335 GwahangnoYuseong-guDaejeon 305-701Republic of Korea KAIST Institute for Eco-energy NanocenturyKAIST335 GwahangnoYuseong-guDaejeon 305-701Republic of Korea Korea Institute of Science and Technology(KIST) 39-1 Hawolgok-dongWolsong-gil 5Seongbuk-guSeoul 136-791Republic of Korea

SnO_(2)/graphene nanocomposites have been fabricated by a simple chemical *** the fabrication process,the control of surface charge causes echinoid-like SnO_(2)nanoparticles to be formed and uniformly decorated on the *** electrostatic attraction between a graphene nanosheet(GNS)and the echinoid-like SnO_(2)particles under controlled pH creates a unique nanostructure in which extremely small SnO_(2)particles are uniformly dispersed on the *** SnO_(2)/graphene nanocomposite has been shown to perform as a high capacity anode with good cycling behavior in lithium rechargeable *** anode retained a reversible capacity of 634 mA·h·g^(–1)with a coulombic efficiency of 98%after 50 *** high reversibility can be attributed to the mechanical buffering by the GNS against the large volume change of SnO_(2)during delithiation/lithiation ***,the power capability is significantly enhanced due to the nanostructure,which enables facile electron transport through the GNS and fast delithiation/lithiation reactions within the echinoid-like nano-SnO_(2).The route suggested here for the fabrication of SnO_(2)/graphene hybrid materials is a simple economical route for the preparation of other graphene-based hybrid materials which can be employed in many different fields.

关键词： Graphene SnO_(2) surface charge nanocomposite rechargeable batteries lithium