センジョウ カンソク データ ニ モトヅク ナンキョク リュツォ・ホルムワン テイチャクヒョウ ノ カキ ニオケル ヒョウアツ オヨビ セキセツシン ブンプ トクセイ ニツイテ

南極観測船「しらせ」船上で取得された海氷観測結果をもとに,リュツォ・ホルム湾定着氷の夏季における氷厚及び積雪深分布について考察した.ビデオ観測結果から求めた各年の全氷厚(氷厚+積雪深)確率密度分布は薄氷型と厚氷型に分けられることがわかった.また大陸沿岸から約km圏内では全氷厚及び積雪深は沿岸に向かって漸減する傾向を示した.これは北東方向の卓越風による積雪輸送によると考えられる.電磁誘導法によって観測された全氷厚分布には不連続的な変化が認められた.NOAAAVHRR画像と比較した結果,不連続の位置は定着氷流出後の再結氷域における一年氷と,未流出の厚い多年氷との境界に一致することがわかった.定着氷の流出範囲は年によって大きく変動する.流出位置が沖側に後退すると厚い多年氷域の割合が多くなり厚氷型になり,沿岸に近づくと積雪影響も相まって厚い多年氷域が縮小または消滅し,薄氷型になるというメカニズムが明らかになった.Sea ice observations have been conducted onboard the Antarctic Research Vessel Shirase" since . The authors summarize these data to investigate spatial and inter-annual variability of sea ice thickness and snow depth of the summer land-fast ice in Lutzow-Holmbukta. Probability density functions of annual total thickness (ice thickness+snow depth) derived from video observations are categorized into two types, i.e. a thin-ice and a thick-ice type. The total thickness distributions observed by the electro-magnetic inductive method have a clear discontinuity, which reects the past break-up of the land-fast ice. Thin rst-year ice develops oshore of this location, while multi-year ice mostly develops onshore. Ice thickness and snow depth gradually decrease toward the coast within about km oshore, probably due to snow drift driven by the strong northeasterly wind. It is concluded that the past breakup of the land-fast ice as well as snow depth have dominant inuence on the spatial distribution of ice thickness in Lutzow-Holmbukta. The extent of break-up varies signicantly year by year. The smaller extent enhances the development of thick multi-year ice, while the larger extent, coupled with the inuence of snow drift, enhances reduction or extinction of thick multi-year ice

沿海产盐区与非产盐区18～45岁人群碘营养状况及甲状腺功能水平研究

目的掌握厦门市沿海产盐区与非产盐区居民盐碘、18～45岁人群碘营养和甲状腺功能水平状况,为采取针对性的防治措施提供依据。方法选择沿海产盐区翔安区和非产盐区集美区为调查点,调查居民合格碘盐食用率、18～45岁育龄期妇女和男性尿碘水平、甲状腺激素水平和海带、紫菜的摄入习惯。结果产盐区和非产盐区盐碘中位数均为27.21 mg/kg,合格碘盐食用率分别为95.33%和96.33%;18～45岁男性尿碘中位数分别为206.55μg/L和232.95μg/L,尿碘<100μg/L的比例分别为20.97%和10%;18～45岁育龄期妇女尿碘中位数分别为176.95μg/L和227.70μg/L,尿碘<100μg/L的比例分别为21.67%和25%;产盐区和非产盐区18～45岁男性和育龄期妇女的甲状腺激素TSH、Tg、FT3、FT4、TPOAb、TT3、TT4中位数均在正常值范围内;产盐区18～45岁男性的甲状腺功能亢进阳性率为3.4%、育龄期妇女的甲状腺功能减退和亚临床甲状腺减退症的阳性率均为1.67%,而非产盐区均为0。产盐区和非产盐区18～45岁男性和育龄期妇女中均有一定比例易患甲状腺免疫性疾病的人群。每月食用海带、紫菜的次数≥4次、1～3次和<1次的人尿碘组间比较无统计学差异。结论产盐区和非产盐区18～45岁男性和育龄期妇女碘营养总体处于适宜状态,应坚持食盐加碘措施,对育龄期妇女在婚前体检时开展常规碘营养水平和甲状腺功能检测

肝切除の看護を経験して

Article信州大学医学部附属病院看護研究集録 1984: 1-7 (1984)departmental bulletin pape

Structural Modeling and Analysis of Liquidity Premium in Ultra-Long Term Yields

现阶段中国10年期以上超长期国债收益率的编制是完善收益率曲线的重要工作。针对超长期国债流动性较低的市场特征,本文通过引入一个刻画其相对流动性溢价的因子,建立了一个扩展的Nelson-Siegel(NS)无套利利率期限结构模型。实证研究表明:该模型对1-30年期的整条国债收益率曲线具有良好的横截面拟合效果;投资者对超长期国债收益率要求平均为正的流动性溢价,对15-30年期收益率的贡献在13-63个基点;模型提取出的流动性因子与传统的流动性指标具有高度的相关性和一致性;脉冲响应的结果表明流动性因子与三个NS因子之间存在着显著的互动关系,而方差分解表明流动性因子在长期对水平因子和斜率因子的贡献较大。Compiling the ultra - long term bond yields is critical in establishing a reasonable yield curve. Taking into account the liquidity condition of ultra - long term bonds, this paper establishes an arbitrage - free term structure model by introducing a liquidity factor that describes the yields of ultra - long term bond under the Nelson -Siegel setting. The empirical study shows that the model performs well in fitting the yield curve. Investors demand an invariant positive liquidity premium for ultra - long - term bonds, and the liquidity factor is highly correlated and consistent with traditional liquidity measures. Finally, impulse response analysis shows that there is a significant interaction between the liquidity factor and the three NS factors, and according to variance decomposition, the contribution of tbe liquidity factor is significant in explaining the variance of the level and slope factors.国家自然科学基金项目(70903053、71273007)；中央国债登记结算有限责任公司委托“金融工程咨询项目”的资助