寻找洋流的鱼

澳洲的阳光在Fred身上留下了印记,在悉尼学习、生活多年的他看起来充满活力。工作时他是个不要命的广告狂人,休假时他爱背上潜水装备,想像自己变成一条鱼．潜入海里寻找此生未见的风景。     

旅行补水膜术师

旅行路上,如果不想让自己看起来像一棵干瘪的白菜,就认真选一款补水面膜吧！8位旅行常客与你分享神奇的补水面膜,让你在走下飞机的时候,能像这棵植物一样水分充足,精神焕发。     

A PROCEDURE FOR ESTIMATING INPUT ENERGY SPECTRA FOR SEISMIC DESIGN

In this paper, the damage potential of an earthquake ground motion is evaluated in terms of the total power of the acceleration of the ground motion. By assuming an appropriate spectral shape for the input energy spectrum, and using the well-known Parseval theorem for evaluating the total power of a random signal, the peak amplification factor for the equivalent input energy velocity spectrum can be determined. It is shown that the peak amplification factor for the input energy spectrum depends on the peak-ground-acceleration to peak-ground-velocity ratio and duration of the strong motion phase of the ground motion. Values for the equivalent input energy velocity amplification factor vary from about 2 to 10 for most of the recorded ground motions used in this study. Although a considerable scatter of data is observed in this study, the peak amplification factor predicted by the Fourier amplitude spectrum of the ground acceleration provides a fairly good estimate of the mean value of the peak input energy compared to that determined from inelastic dynamic time history analyses, particularly for systems with high damping and low lateral strength. The peak amplification factor derived in this paper provides a more consistent approach for estimation of seismic demand when compared to an earlier empirical expression used for the formulation of duration-dependent inelastic seismic design spectra, even though only a slight difference in the required lateral strength results from the use of the new formula.     

我爱哈吉巷

在新加坡该做些什么？下次在此逗留期间请务必将“游走哈吉巷”这一项列入你的行程表,并用着重号注明。有大把时间想要消磨的时候,我会几乎不动脑子地直奔啥吉巷而去。 哈吉巷这条被冠以“代表新加坡上辈人生活方式”的巷子,两旁绵延着旧时二层联体房屋,已被当做往日生活印记保护起来。离它不远是著名的苏丹回教堂。如今仍可以看到,在这儿和临近的阿拉伯街,有很多堆着土耳其水烟的餐馆,一到夜晚,各种身份的人坐在门口吞云吐雾。     

裹着早春出发

4月,甩掉冬天一样沉重的装备,带上我们为你推荐的新物件,带着春的轻盈与色彩,出发!     

摄影铭

<正>仿唐代诗人刘禹锡《陋室铭》习作,以此献给老年摄影爱好者——片不在佳,得心则名。具不在精,应手则灵。斯是光艺,唯吾痴心。孤芳当自璐,百艳汇群星高师同知己,影友胜亲朋。可以品自然,赏百景。无乱事     

CORRECTIONS FOR DRILL-BIT CONTAMINATION IN SAMPLING ANCIENT POTTERY FOR NEUTRON ACTIVATION ANALYSIS

The routine measurement of tungsten concentrations in pottery sampled with tungsten-carbide drill bits has enabled the measured concentrations of cobalt, tantalum, and lutetium to be corrected for drill-bit contamination. The corrected data, for cobalt at least, are sufficiently accurate that they regain their value as chemical indicators of pottery provenance.     

邦达森厦——邦达仓的建筑

邦达仓“森厦”（森厦,贵族城市府邸）位于八廓街东南角,与大多数拉萨老城里的贵族府邸一样,在外侧用一道毫无特征的厚重石墙将自己封闭起来——仅通过一座辉煌的房门与外界取得联系,让外来人很难从外观上一探究竟。在外部,或许是出于宗教道德或社会传统观念的考量,贵族的“森厦”如居住其中的贵族们一样,表现出一种“不事张扬”和“谨小慎微”的拉萨旧贵族品质。邦达仓自然也不例外。