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Traffic Flow States in a Freeway with Bottleneck 被引量:2
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作者 PENG Zi-Hui SUN Gang ZHU Jing-Yi 《Communications in Theoretical Physics》 SCIE CAS CSCD 2009年第1期145-148,共4页
The system of mixture of single lane and double lane is studied by a cellular automata model, which is developed by us based on the Nagel and Schreckenberg's models. We justify that the model can reach a stable state... The system of mixture of single lane and double lane is studied by a cellular automata model, which is developed by us based on the Nagel and Schreckenberg's models. We justify that the model can reach a stable states quickly. The density distributions of the stable state is presented for several cases, which illustrate the manner of the congestion. The relationship between the outflow rate and the total number of vehicles and that between the outflow rate and the density just before the bottleneck are both given. Comparing with the relationship that occurring in the granular flow, we conclude that the transition from the free traffic flow to the congested traffic flow can also be attributed to the abrupt variation through unstable flow state, which can naturally explain the discontinuities and the complex time variation behavior observed in the traffic flow experiments. 展开更多
关键词 granular flow phase transition stochastic process
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“物理”还是“道理”——作为实学的朱子“格物”论 被引量:1
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作者 沈娟 《朱子学刊》 2014年第1期40-53,共14页
一、引言:社仓法及其他《中庸》言:'文理密察,足以有別也。'这句话用来形容一代大儒朱熹,也再恰当不过。朱子是一个心思极为缜密之人,又肯认真,无论学问,还是区处事物,莫不文理密察,臻乎极善。抛开其精微深刻的思想体系不论,更... 一、引言:社仓法及其他《中庸》言:'文理密察,足以有別也。'这句话用来形容一代大儒朱熹,也再恰当不过。朱子是一个心思极为缜密之人,又肯认真,无论学问,还是区处事物,莫不文理密察,臻乎极善。抛开其精微深刻的思想体系不论,更不必说他谨于出处进退,严于义利之防之自修实效,单从所谓的事功或实践层面看,朱子居其位,必谋其政,讲求实事,躬历亲履,不避繁细,以故他虽然一生频频辞官. 展开更多
关键词 社仓法 文理 事物 历亲 层面 实事 密察 区处 格物
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Effects of the Multiple Needling with Shallow Insertion for Simple Obesity:A Clinical Observation on Lipid Metabolism and on the Chest,Waist and Hip Circumferences 被引量:2
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作者 吴洲红 陈正秋 《Journal of Traditional Chinese Medicine》 SCIE CAS CSCD 2009年第3期179-181,共3页
Objective: To observe the therapeutic effects of multiple needling with shallow insertion tot simple obesity, and its influence on the chest, waist and hip circumferences, and lipid metabolism. Methods: 20 cases whi... Objective: To observe the therapeutic effects of multiple needling with shallow insertion tot simple obesity, and its influence on the chest, waist and hip circumferences, and lipid metabolism. Methods: 20 cases which match the criteria for diagnosis of simple obesity were treated by multiple needling with shallow insertion. Treatment was given once daily for 20 days as a total therapeutic course. Results: After 20 treatments, the body weight, waistline, and the serum total cholesterol (TC), the fasting triglyceride (TG) and low-density lipoprotein (LDL) were significantly changed (P〈0.05). Conclusion: The therapy can provide good theraoeutic effects for simple obesity. 展开更多
关键词 obesity multiple needling with shallow insertion lipid metabolism
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Dating a 109.9 m ice core from Dome A (East Antarctica) with volcanic records and a firn densification model 被引量:5
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作者 LI ChuanJin XIAO CunDe +3 位作者 HOU ShuGui REN JiaWen DING MingHu GUO Rui 《Science China Earth Sciences》 SCIE EI CAS 2012年第8期1280-1288,共9页
A 109.9 m ice core was extracted at a location about 300 m away from the Dome A summit (80°00′S, 77°21″E) by the Chinese team of the International Trans-Antarctic Science Expedition (ITASE) during the ... A 109.9 m ice core was extracted at a location about 300 m away from the Dome A summit (80°00′S, 77°21″E) by the Chinese team of the International Trans-Antarctic Science Expedition (ITASE) during the 21st Chinese National Antarctica Research Expedition (CHINARE) in January 2005. Two independent methods were used for dating the ice core, volcanic event markers shown by prominent non-sea-salt sulfate (nss-SO4^2-) and the Herron and Langway (H-L) firn densification model. Six promi- nent volcanic events (Agung 1963 AD, Tambora 1815 AD, Kuwae 1453 AD, Unknown 1259 AD, Taupo 186 AD and Pinatubo 1050 BC) were identified by comparison with other Antarctic ice cores. Based on the mean accumulation rates be- tween adjacent events, we estimate the age at the tim pore close-off depth (102 m) was 3516±100 a BP. This is the oldest close-off age ever reported from the Antarctic and the Greenland ice sheets. Calculations using the H-L model show that the age at the same depth is 3581±100 a BP. The two dating techniques differ by 65 years, or -1.8% of the record. We calculated the bottom age of the ice core as 4009±150 a BP using the volcanic dating method and 4115±150 a BP using the H-L model method. 展开更多
关键词 Eastern Antarctic ice sheet Dome A volcanic events ice core dating
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