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| 1 | Unstable Head-Flow Characteristic Generation Mechanism of a Low Specific Speed Mixed Flow Pump显示文摘This paper treats the flow instabilities in a mixed flow pump with a vaned diffuser. Test pump has a positive slope of a head-flow performance curve at 65% flow rate of BEP (Best Efficiency Point) because of a rotating stall. Dynamic Particle Image Velocimetry (PIV) and pressure fluctuation measurements are used for investigating the propagation mechanism of a rotating stall. It was found that unstable performance was caused by periodical large scale abrupt backflow generated from the vaned diffuser to the outlet of impeller. Further, the relation between the static pressure at the inlet of diffuser vane and the internal flow condition was clarified. From these experimental results, in order to improve the positive slope of a head-flow performance curve, to suppress the growth of strong vortex toward the inlet of diffuser vane was proved to be a key point. | Masahiro MIYABE Hideaki MAEDA Isamu UMEKI Yoshinori JITTANI | 2006 | Journal of Thermal Science2006，15，2： | 53 |
| 2 | Height growth, diameter-height relationships and branching architecture of Pinus massoniana and Cunninghamia lanceolata in early regeneration stages in Anhui Province, eastern China: effects of light intensity and regeneration mode显示文摘To determine the growth strategies during early regeneration stages of two major coniferous species (Pinus massoniana and Cunninghamia lanceolata) in a secondary mixed coniferous forest in the Huangshan region of Anhui Province, eastern China, we examined height growth, diameter-height relationship and the relationship between main stem and lateral branch elongation in saplings, with a particular focus on the effects of light intensity and regeneration mode (seedlings versus sprouts). When light intensity was sufficiently high, the extension growth of main stems was greater and more positively related to initial size for P. massoniana than for C. lanceolata. The slenderness of the stem form increased in the following order: C. lanceolata seedlings < P. massoniana seedlings < C. lanceolata sprouts. P. massoniana became less slender with increasing light intensity. P. massoniana had shorter branches than C. lanceolata given the same main stem elongation. Growth allocation depended more strongly on light intensity for P. massoniana than for C. lanceolata, with more growth allocated to the main stem under dark conditions. These results suggest that P. massoniana is a typical shade avoider; this species gives priority to extension growth of the main stem, especially when it is shaded. In contrast, C. lanceolata is a shade tolerator; this species allocates more biomass to radial growth of its main stems and to extension growth of branches. Based on these results, the ecological characteristics of P. massoniana and C. lanceolata and the roles of seedlings and sprouts are discussed in relation to stand dynamics of the mixed forests of P. massoniana and C. lanceolata in eastern China. | CHENG Xi-ping Umeki KIYOSH Honjo TSUYOSHI SHAO Peng-yue | 2011 | Forestry Studies in China2011，13，1： | 9 |
| 3 | Somatic - cell mutations as a possible predictor of cancer risk 显示文摘 | AKIYAMA M UMEKI S KUSUNOKI Y | 1995 | Health Phys1995，68，5： | 1 |
| 4 | Analysis of an updraft biomass gasifier with high temperature steam using a numeri-cal model显示文摘 | Umeki K Yoshikawa K Namioka T | 2012 | Applied Energy2012，90，1： | 1 |
| 5 | Impacts of Ush-er syndrome type IB on human myosin VIIa motor func-tion显示文摘 | Watanabe S Umeki N Ikebe R | 2008 | Biochemistry2008，47，36： | 1 |
| 6 | Usefulness of serum pro- calcitonin measurement in the diagnosis of bacterial infection in patients with systemic autoimmune diseases显示文摘 | Takajo I Yamamoto I Umeki K | 2012 | Rinsho Byori2012，60，4： | 1 |
| 7 | Cargo binding acti-vates myosin VIIA motor function in cells显示文摘 | Sakai T Umeki N Ikebe R | 2011 | Proc NatlAcad Sci U S A2011，108，17： | 1 |
| 8 | Severe fever with thrombocytopenia syndrome in Japan and public health communication 显示文摘 | Saito T Fukushima K Umeki K | 2015 | Emerg Infect Dis2015，21，3： | 1 |
| 9 | Frequency of mutant T lymphocytes defective in the expression of the T - cell antigen receptor gene among radiation - exposed people显示文摘 | KYOIZUMI S UMEKI S AKIYAMA M | 1992 | Mutat Res1992，265，2： | 1 |
| 10 | Stimulated rapid ex- pression in vitro for early detection of in vivo T - cell receptor mutations induced by radiation exposure 显示文摘 | ISHIOKA N UMEKI S HIRAI Y | 1997 | Mutat Res1997，390，3： | 1 |
| 11 | Neoadjuvant intraarterial chemotherapy with nedaplatin,peplomycin and mitomycin C for advanced cervical cancer显示文摘 | Umeki H Yamaguchi Y Tsugata M | 2003 | Gan To Kagaku Ryoho2003，30，3： | 1 |
| 12 | Usefulness of serum procalcitonin measurement in the diagnosis of bacterial in- fection in patients with systemic autoimmune diseaes 显示文摘 | Takajo I Yamamoto I Umeki K | 2012 | Rinsho Byori2012，60，4： | 1 |
| 13 | Frequency stabilization of a laser diode with use of light-induced birefringencein an atomic vapor显示文摘 | Yoshikawa Y Umeki T Mukae T | 2003 | Appl Opt2003，42，33： | 1 |
| 14 | The validity of VRML images as a stimulus for landscape assessment显示文摘 | Tsuyoshi Honjo Kiyoshi Umeki | 2005 | Landscape and Urban Planning2005，，14： | 1 |
| 15 | High temperature steam-only gasification of woody biomass 显示文摘 | Kentaro Umeki Kouichi Yamamoto Tomoaki Namioka | 2010 | Applied Energy2010，87，3： | 1 |
| 16 | A case of tunerculous peritonitis diagnosed by ultrasonography guided pertineal biopsy显示文摘 | Mizunoe S Morinaga R Umeki K | 2000 | Kansenshogaku Zasshi2000，74，7： | 1 |
| 17 | Patterns in individual growth, branch population dynamics and growth and mortality of first-order bran- ches of Betula platyphylla in northern Japan显示文摘 | Umeki K Kikuzawa K | 2000 | Annals of Forest Science2000，57，56： | 1 |
| 18 | Microfabrication of thermoelectric materials by silicon molding process显示文摘 | Li Jing Feng Tanaka Shuji Umeki Toshiya | 2003 | Sensors and Actuators A2003，108，： | 1 |
| 19 | Somatic cell mutations,a possible predictor of cancer risk显示文摘 | Akiyaman M Umeki S Kusunoki Y | 1995 | Health Phys1995，68，： | 1 |
| 20 | Relationships between leaf characteristics,tree sizes and species distribution along a slope in a warm temperate forest显示文摘 | Hanba Y T Noma N Umeki K | 2000 | Ecological Research2000，15，4： | 1 |
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