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关键词： 真实感受   圣诞节   我最棒  

摘要： "这是一年中最美好的时光。"我七岁的儿子内森大笑着唱道。我喜欢圣诞节,我确实喜欢。它美妙而温暖,将家人聚集在一起。这是个向我们所爱的人展示我们对他们真实感受的机会。但那也会很忙,近乎混乱。12月份,我的待办事项比一年中任何时候都长。但我真的很喜欢圣诞节。

关键词： 柳亚子   民主人士   朱蕴山   章乃器   新政协   马寅初   李济深   圣诞节  

摘要： 他曾被人误以为"叛变",而他创办的企业还在延续传奇这是一条驶向新中国的巨轮。1948年圣诞节次日凌晨,从香港到大连的"阿尔丹号"巨轮上载满了30多位民主人士,其中包括李济深、茅盾夫妇、朱蕴山、章乃器、柳亚子、马寅初等人。他们之中一部分人在内战爆发后避居香港,还有一部分人此次专门借道香港北上,到解放区筹备即将召开的新政协,共商建立新中国的大计。一位"不速之客"的到来让所有人大吃一惊。

关键词： Subsea Xmas tree   Group maintenance   Reliability   Availability   Stochastic dependency  

摘要： Subsea Xmas trees (XTs) are vital equipment for offshore oil and gas development. Due to a long and continuous operation, components of XTs often become vulnerable subjected to degradation and unexpected failures. Due to the uncertainties of subsea operation and fault tolerance design, current maintenances on heterogeneous components, which are assumed to be independent of each other, perform separately. Only one PM mode (imperfect or perfect) is considered. However, these assumptions impede the application of state-of-the-art research results on the maintenance of this equipment. Therefore, for XTs with stochastic dependency, this study proposes a group maintenance optimization approach that combines maintenance activities to reduce maintenance costs. Reduction factors are introduced to measure the effects of various preventive maintenance (PM) actions, and the optimal component-level PM intervals can be obtained. An improved group strategy can be explored in consideration of stochastic dependency and opportunity maintenance. Utilizing the collaborative particle swarm optimization (CPSO) algorithm, the cost of an optimal group maintenance plan can be minimized while maintaining the availability. The uses and advantages of the proposed group maintenance approach are illustrated by a case study on a Horizon Xmas tree with a 14-component system.

关键词： Cadmium   Christmas Island flying-fox   Iron   Fur   Urine   Wildlife ecotoxicology  

摘要： The Christmas Island flying-fox (Pteropus natalis) is the last native mammal on Christmas Island and its population is in decline. Phosphate mining occurs across much of the eastern side of Christmas Island. The phosphate deposits are naturally rich in cadmium, and potentially other metals, which may be threatening the Christmas Island flying-fox population. To test this, concentrations of metals (cadmium, copper, iron, mercury, lead, and zinc) were measured in fur and urine collected from Christmas Island flying-foxes and interpreted concurrently with urinalysis and serum biochemistry data. In addition, metal concentrations in liver and kidney samples from two Christmas Island flying-foxes and associated histological findings from one of these individuals are reported. Fur cadmium concentrations were significantly higher in the Christmas Island flying-fox compared to concentrations found in flying-foxes in mainland Australia. Additionally, 30% of Christmas Island flying-foxes had urine cadmium concentrations exceeding maximum concentrations previously reported in flying-foxes in mainland Australia. Glucosuria and proteinuria were identified in two Christmas Island flying-foxes, suggestive of renal dysfunction. In one aged flying-fox, kidney cadmium concentrations were four-fold higher than toxic thresholds reported for domestic mammals. Microscopic evaluation of this individual identified bone lesions consistent with those described in laboratory animals with chronic cadmium poisoning. These results suggest that Christmas Island flying-foxes are being exposed to cadmium and identification of these sources is recommended as a focus of future research. Unexpectedly, urine iron concentrations in Christmas Island flying-foxes were higher compared to previous studies of Australian mainland flying-foxes, which suggests that urinary excretion of iron may be an important aspect of iron homeostasis in this species whose diet is iron rich. (C) 2020 The Authors. Published by

关键词： 圣诞礼物   腾讯   零花钱   QQ聊天   小学生   经济学   圣诞节   QQ游戏  

摘要： 霄霄读小学四年级时,就对股市曲线图很感兴趣,他问我:“妈妈,为什么这个线--会儿上去,一会儿又下来了?”那是2011年,霄霄在学校有一堂课,叫“儿童经济学”,老师会给孩子们讲货币的起源,也讲股票和投资。这年圣诞节,我对霄霄说:“妈妈送你一个圣诞礼物--1万元的本金,你可以告诉妈妈,你想买什么公司的股票,妈妈帮你操作。赚的钱都给你当零花钱,亏的钱由妈妈来承担。”他很开心。霄霄让我买的第一只股票是腾讯。他们小学生经常用QQ聊天,玩QQ游戏。我觉得腾讯应该做得不错,能让这么小的孩子忠实于它。事实证明,我们的判断是对的。几年来,腾讯的股价一路飞涨,儿子因为这次投资,获得了收益。

关键词： 玛丽   圣诞节   母亲   父亲  

摘要： 那年罗伯十五岁,仍待在父亲的农场里。圣诞节的前几天,他无意中听到父亲对母亲说的话,他才意识到,父亲很爱他。"玛丽,我真不愿在早晨叫醒罗伯。他现在长得真快,正是需要睡眠的时候,我真想自己一个人顶着干。""唉,你干不了,亚当。"母亲的声音很清脆,"另外,罗伯也不是小孩子了。是他干活的时候了。"

关键词： 教案设计   圣诞节   真谛  

摘要： 1.学生:预习课本中有关圣诞节的词汇和表达节日意义的句型。2.教师:利用互联网准备圣诞节相关资料,制作多媒体课件,准备教具。

关键词： 圣诞颂歌   铜钟   公共建筑   圣托马斯   纽约第五大道   国家彩票   圣诞节  

摘要： 英国最后仅存的一家大型铸钟厂由于获得了价值345万英镑的国家彩票,在圣诞节前得到了挽救。自1859年以来,作为约翰·泰勒铸钟厂(John Taylor&Co bell)家乡标志的拉夫堡铸钟厂已经铸造了超过25000个铜钟,这些钟悬挂在100多个国家的教堂、大学和公共建筑中。英国2000万人,乃至全球数亿人,每天都能听到拉夫堡铸钟厂所铸铜钟的钟声。美妙的钟声甚至已经融入了流行文化。波格和柯斯蒂·麦考尔演唱的圣诞颂歌《纽约童话(Fairytale of New York)》中就录入了纽约第五大道圣托马斯教堂(St Thomas's Church)的钟声,而教堂的铜钟都是在拉夫堡铸造的。

关键词： 火锅店   看守所   黄鹤楼   圣诞节   北山  

摘要： 1圣诞节那天,北山市地产商黄建宏从看守所出来了。看守所待了七天,好比夜夜笙箫红翠之人乍然入寺,那一份寡淡让他周身不舒服,每个细胞里都是无尽的空。黄总打了个电话,不到一个小时,便在百米大道黄鹤楼凑起了一桌宴席。先到的是北山市川蜀火锅店的苏光荣,中等个头,顶发犹存,显得年轻。