选注者言:排名,也许是市场经济的一个特点或是标记。Mercer Human Re-source Consulting每年都要给世界城市进行排名,排名的主旨是居民的生活质量。其具体标准不得而知,但是,本文告诉我们共有39项标准,涉及政治、社会以及经济。本次名...选注者言:排名,也许是市场经济的一个特点或是标记。Mercer Human Re-source Consulting每年都要给世界城市进行排名,排名的主旨是居民的生活质量。其具体标准不得而知,但是,本文告诉我们共有39项标准,涉及政治、社会以及经济。本次名列榜首的是瑞士的苏黎世。在被排名的215个城市中,伊拉克首都巴格达被排名倒数第三,即第213名,因为那里的天空战云密布。展开更多
On February 8, 2006, a piece of sad news came out of the Moon Bear Rescue Center in Chengdu, capital city of southwest China's Sichuan Province. Andrew, the first moon bear rescued by the Animals Asia Foundation, ...On February 8, 2006, a piece of sad news came out of the Moon Bear Rescue Center in Chengdu, capital city of southwest China's Sichuan Province. Andrew, the first moon bear rescued by the Animals Asia Foundation, which sponsors the center, died of liver cancer, thought to have arisen from the massive infec-展开更多
【选注者言:这是一篇“网”上文章。标题怪异!初读之下,觉得文章的标题似有误,是否应改为:It May Be Easy To Die Soon—Just Stop Eating!读罢全文,方才醒悟:标题里的所谓Just Stop Eating,其实是指mild starvation/gentle starving。...【选注者言:这是一篇“网”上文章。标题怪异!初读之下,觉得文章的标题似有误,是否应改为:It May Be Easy To Die Soon—Just Stop Eating!读罢全文,方才醒悟:标题里的所谓Just Stop Eating,其实是指mild starvation/gentle starving。新华社就此消息从洛杉矶发回一则电讯,国内不少报刊为此新闻所拟的标题是:略带三分饥 健康又长寿。Dr. Roy Walford of the University of California Los Angeles从1991年至1993年,和7位同事在亚利桑那州大沙漠“第二生物圈”里“与世隔绝”,生活了两年。“第二生物圈”旨在试验人类能否在太空生存。科学家们在那里制造维持自己生命所需要的空气,把自己用过的每一滴水收集起来循环使用,种植自己食用的作物。由于环境恶劣,科学家们在“第二生物圈”里能吃到的食物很少。Dr. Roy Walford记录了减少食量后科学家们的身体所发生的良性变化。近百年来,科学家一直在试验室里通过试验鼠做类似的实验。实验的结果是:半饥饿实验鼠的体能和精神状态比饱食的实验鼠好得多,它们的心脏更健康,免疫力更强,患癌症的比例更低,生殖能力也更旺盛,寿命延长了70％!James Nelson of the University of Texas Health Sciences Center认为:细胞死亡是衰老的重要因素。展开更多
我在网上阅读此文后,走出家门,惊闻一个邻居去世了。这位教授在这个世界上仅活了60个春秋。他的死讯令所有认识他的人吃惊并扼腕,说他走得太快。若干年前,国人日:人生六十古来稀。可见,人的寿命托现代医学科学发展的福,已经大大延长了...我在网上阅读此文后,走出家门,惊闻一个邻居去世了。这位教授在这个世界上仅活了60个春秋。他的死讯令所有认识他的人吃惊并扼腕,说他走得太快。若干年前,国人日:人生六十古来稀。可见,人的寿命托现代医学科学发展的福,已经大大延长了。君不见,上海居民的平均寿命正奔八十！ 这篇文章信息多,文字美。我热忱地把它介绍给大家。 如何看待衰老?人的青壮年时代何以如此短暂?文章亮出一个惊人观点: …as our body shuts down hormone production,so we begin to grow old.Aging is a disease.It is due to the decline of reproductive hormones and what youhave to do is replace them. 人们历来坚信不疑的健身长寿之道在本文也受到了质疑: They’re beginning to realize that just to exercise,to watch their weight,isn’t good enough.That not to smoke is of limited value. 既然已经弄清人的衰老系 the decline of reproductive hormones,那么,问题就简单了,采取相应的措施即可: The remedy,then,is simple.Like an empty petrol tank,the body justneeds topping up. 这种elixirs(长寿不老药)的关键成分是dehydroepiandrosterone(【生化】脱氢表雄酮).本文简称DHEA。DHEA的作用是:"restores展开更多
EVER since there have been families in China, it has been traditional for the elderly to spend their later years living at home with their children; if the children have married and presented their parents with grandc...EVER since there have been families in China, it has been traditional for the elderly to spend their later years living at home with their children; if the children have married and presented their parents with grandchildren, the household may consist of a large extended family in which three to four generations live under one roof. Nowadays, many elderly Chinese still fit into this mold. According to a sampling survey taken in 1995, among households with older members, 67.64 million seniors—or 74.73 percent of the total—lived with their adult children. Though some older people live展开更多
Next to West Third Ring Road in Beijing stands a building called Guanyuan Plaza.Flanked by residential apartments and bustling traffic,it is unremarkable—boring,even.But go underground and you will discover that it’...Next to West Third Ring Road in Beijing stands a building called Guanyuan Plaza.Flanked by residential apartments and bustling traffic,it is unremarkable—boring,even.But go underground and you will discover that it’s teeming with international inhabitants:chinchillas from South America,bearded dragons from Australia and turtles from the Philippines.展开更多
Network topology inference is one of the important applications of network tomography.Traditional network topology inference may impact network normal operation due to its generation of huge data traffic.A unicast net...Network topology inference is one of the important applications of network tomography.Traditional network topology inference may impact network normal operation due to its generation of huge data traffic.A unicast network topology inference is proposed to use time to live(TTL)for layering and classify nodes layer by layer based on the similarity of node pairs.Finally,the method infers logical network topology effectively with self-adaptive combination of previous results.Simulation results show that the proposed method holds a high accuracy of topology inference while decreasing network measuring flow,thus improves measurement efficiency.展开更多
In this paper,we try to understand the difference in approach of the Schopenhauerian and Nietzschean philosophers with regard to the notions of life and will,by highlighting the distance that separates them.Beyond hig...In this paper,we try to understand the difference in approach of the Schopenhauerian and Nietzschean philosophers with regard to the notions of life and will,by highlighting the distance that separates them.Beyond highlighting this distance,we wonder about the lessons that the African subject,as an agent of history,can draw from it,first for his emancipation,then to promote the development of history Africa.展开更多
Rapid developments in information and communication technology in recent years have posed a significant challenge in wireless multimedia sensor networks(WMSNs).End-to-end delay and reliability are the critical issues ...Rapid developments in information and communication technology in recent years have posed a significant challenge in wireless multimedia sensor networks(WMSNs).End-to-end delay and reliability are the critical issues in multimedia applications of sensor networks.In this paper we provide a new cross-layer approach for provisioning the end-to-end delay of the network at a desirable level of the packet delivery ratio(PDR),used here as a measure of network reliability.In the proposed multi-level cross-layer(MLCL)protocol,the number of hops away from the sink is used to set a level for each node.A packet is routed through the path with the minimum hop count to the sink using this level setting.The proposed protocol uses cross-layer properties between the network and medium access control(MAC)layers to estimate the minimum delay,with which a node can deliver a packet to the sink.When a node wants to send a packet,the MLCL protocol compares this minimum delay with the time to live(TTL)of a packet.If the TTL of the packet is higher than the minimum delay,the node sends the packet through the path with the minimum delay;otherwise,the node drops the packet as the node cannot deliver it to the sink within the TTL duration.This packet dropping improves network performance because the node can send a useful packet instead of an unusable packet.The results show a superior performance in terms of end-to-end delay and reliability for the proposed protocol compared to state-of-the-art protocols.展开更多
文摘选注者言:排名,也许是市场经济的一个特点或是标记。Mercer Human Re-source Consulting每年都要给世界城市进行排名,排名的主旨是居民的生活质量。其具体标准不得而知,但是,本文告诉我们共有39项标准,涉及政治、社会以及经济。本次名列榜首的是瑞士的苏黎世。在被排名的215个城市中,伊拉克首都巴格达被排名倒数第三,即第213名,因为那里的天空战云密布。
文摘On February 8, 2006, a piece of sad news came out of the Moon Bear Rescue Center in Chengdu, capital city of southwest China's Sichuan Province. Andrew, the first moon bear rescued by the Animals Asia Foundation, which sponsors the center, died of liver cancer, thought to have arisen from the massive infec-
文摘【选注者言:这是一篇“网”上文章。标题怪异!初读之下,觉得文章的标题似有误,是否应改为:It May Be Easy To Die Soon—Just Stop Eating!读罢全文,方才醒悟:标题里的所谓Just Stop Eating,其实是指mild starvation/gentle starving。新华社就此消息从洛杉矶发回一则电讯,国内不少报刊为此新闻所拟的标题是:略带三分饥 健康又长寿。Dr. Roy Walford of the University of California Los Angeles从1991年至1993年,和7位同事在亚利桑那州大沙漠“第二生物圈”里“与世隔绝”,生活了两年。“第二生物圈”旨在试验人类能否在太空生存。科学家们在那里制造维持自己生命所需要的空气,把自己用过的每一滴水收集起来循环使用,种植自己食用的作物。由于环境恶劣,科学家们在“第二生物圈”里能吃到的食物很少。Dr. Roy Walford记录了减少食量后科学家们的身体所发生的良性变化。近百年来,科学家一直在试验室里通过试验鼠做类似的实验。实验的结果是:半饥饿实验鼠的体能和精神状态比饱食的实验鼠好得多,它们的心脏更健康,免疫力更强,患癌症的比例更低,生殖能力也更旺盛,寿命延长了70％!James Nelson of the University of Texas Health Sciences Center认为:细胞死亡是衰老的重要因素。
文摘我在网上阅读此文后,走出家门,惊闻一个邻居去世了。这位教授在这个世界上仅活了60个春秋。他的死讯令所有认识他的人吃惊并扼腕,说他走得太快。若干年前,国人日:人生六十古来稀。可见,人的寿命托现代医学科学发展的福,已经大大延长了。君不见,上海居民的平均寿命正奔八十！ 这篇文章信息多,文字美。我热忱地把它介绍给大家。 如何看待衰老?人的青壮年时代何以如此短暂?文章亮出一个惊人观点: …as our body shuts down hormone production,so we begin to grow old.Aging is a disease.It is due to the decline of reproductive hormones and what youhave to do is replace them. 人们历来坚信不疑的健身长寿之道在本文也受到了质疑: They’re beginning to realize that just to exercise,to watch their weight,isn’t good enough.That not to smoke is of limited value. 既然已经弄清人的衰老系 the decline of reproductive hormones,那么,问题就简单了,采取相应的措施即可: The remedy,then,is simple.Like an empty petrol tank,the body justneeds topping up. 这种elixirs(长寿不老药)的关键成分是dehydroepiandrosterone(【生化】脱氢表雄酮).本文简称DHEA。DHEA的作用是:"restores
文摘EVER since there have been families in China, it has been traditional for the elderly to spend their later years living at home with their children; if the children have married and presented their parents with grandchildren, the household may consist of a large extended family in which three to four generations live under one roof. Nowadays, many elderly Chinese still fit into this mold. According to a sampling survey taken in 1995, among households with older members, 67.64 million seniors—or 74.73 percent of the total—lived with their adult children. Though some older people live
文摘Next to West Third Ring Road in Beijing stands a building called Guanyuan Plaza.Flanked by residential apartments and bustling traffic,it is unremarkable—boring,even.But go underground and you will discover that it’s teeming with international inhabitants:chinchillas from South America,bearded dragons from Australia and turtles from the Philippines.
基金supported by the National Natural Science Foundation of China (Nos.61373137,61373017, 61373139)the Major Program of Jiangsu Higher Education Institutions (No.14KJA520002)+1 种基金the Six Industries Talent Peaks Plan of Jiangsu(No.2013-DZXX-014)the Jiangsu Qinglan Project
文摘Network topology inference is one of the important applications of network tomography.Traditional network topology inference may impact network normal operation due to its generation of huge data traffic.A unicast network topology inference is proposed to use time to live(TTL)for layering and classify nodes layer by layer based on the similarity of node pairs.Finally,the method infers logical network topology effectively with self-adaptive combination of previous results.Simulation results show that the proposed method holds a high accuracy of topology inference while decreasing network measuring flow,thus improves measurement efficiency.
文摘In this paper,we try to understand the difference in approach of the Schopenhauerian and Nietzschean philosophers with regard to the notions of life and will,by highlighting the distance that separates them.Beyond highlighting this distance,we wonder about the lessons that the African subject,as an agent of history,can draw from it,first for his emancipation,then to promote the development of history Africa.
基金project supported by the Shahid Chamran Univesity of Ahvaz(No.96/3/02/16670)
文摘Rapid developments in information and communication technology in recent years have posed a significant challenge in wireless multimedia sensor networks(WMSNs).End-to-end delay and reliability are the critical issues in multimedia applications of sensor networks.In this paper we provide a new cross-layer approach for provisioning the end-to-end delay of the network at a desirable level of the packet delivery ratio(PDR),used here as a measure of network reliability.In the proposed multi-level cross-layer(MLCL)protocol,the number of hops away from the sink is used to set a level for each node.A packet is routed through the path with the minimum hop count to the sink using this level setting.The proposed protocol uses cross-layer properties between the network and medium access control(MAC)layers to estimate the minimum delay,with which a node can deliver a packet to the sink.When a node wants to send a packet,the MLCL protocol compares this minimum delay with the time to live(TTL)of a packet.If the TTL of the packet is higher than the minimum delay,the node sends the packet through the path with the minimum delay;otherwise,the node drops the packet as the node cannot deliver it to the sink within the TTL duration.This packet dropping improves network performance because the node can send a useful packet instead of an unusable packet.The results show a superior performance in terms of end-to-end delay and reliability for the proposed protocol compared to state-of-the-art protocols.
