Two‐regime Pattern in Human Mobility: Evidence from GPS Taxi Trajectory Data

Research on complex systems has identified various aggregate relationships in phenomena that describe these systems. Travel length has been characterized by negative power distributions. Controversy, however, exists over whether mobility patterns can be modeled in terms of a simple power law (Lévy flight model) or that more complicated power laws (exponential power law, truncated Pareto) are required. This study concentrates on two issues: testing the validity of exponential power laws and truncated Pareto distributions in urban systems to describe aggregate mobility patterns, and examining differences in mobility patterns for different travel purposes. The article describes the results of an analysis of Global Positioning System (GPS) taxi trajectory data, collected in Guangzhou, China, to identify mobility patterns in the city. The least squares statistic is used to estimate the parameters of the distribution functions. Results suggest that a fusion of functions, based on an exponential power law and a truncated Pareto distribution, represents the travel time distribution best. Moreover, the findings of this study indicate different mobility patterns to exist for different travel purposes.     

充满时代特点的县志

近日,笔拜读了《井陉县志》（1985-2004）（以下简称为《井志》）。感受最深的是,该志充满了鲜明时代特点。其特征是：突出以经济建设为中心;突出改革开放;突出政治明建设;突出精神明建设。[第一段]     

植根于民族沃土中的《中国土族》

我是一个老西宁人,对土族这个民族自小并不陌生,知道那么一鳞半爪。然而真正了解土族这个民族,还是在《中国土族》出版问世后。     

Diplomatic compromises between the United States and Japan during the Nanjing Massacre

ABSTRACT

During its assault on Nanjing, the Japanese Army bombarded and sank the USS Panay, an American gunship, straining the relations between Japan and the United States. During the Nanjing Massacre, to ease tensions with the United States, Japan allowed the staff of the American embassy in Nanjing to make an early return to the city. While investigating allegations that Japanese troops had trespassed on American property and kidnapped and raped a Chinese woman, the American diplomat John M. Allison was struck in the face by a Japanese soldier. The U.S. government exerted pressure on Japan over what was referred to as the “Allison Incident”: under orders from Tokyo, the Japanese occupying force in Nanjing apologized to Allison and placed the officers and soldiers involved in the incident under court-martial. The incident was thereby resolved. However, amidst the furor of the “Allison Incident,” the Chinese woman who had been assaulted was forgotten by both the American and Japanese governments as well as by public opinion. The Japanese soldiers were placed under court-martial not for raping the Chinese woman, but rather for striking an American diplomat. The U.S. government received a great many reports on the atrocities committed by the Japanese Army, but in policy and deed, the American response was limited to safeguarding its national interests in China.     

图绘中的雁意象与诗人对画图的解读——以宋代题画诗为例

雁意象受传统文化影响而形成的符号意义影响着观画者对画图的解读及感受,最容易牵扯出观者内心深处的羁旅和乡思之情愁。表现在题画诗中,雁意象多与羁旅和思乡之情相联系。     

创造性的经营--论稻盛和夫的经营策略

不断创新,保持独特性,是京瓷成功的重要原因。本文从技术、对外合作、市场开发等方面探讨了京瓷的创新。企业要创新,就应该不断地进行细微的改进。稻盛和夫的创新思想与日本传统的商业文化有密切联系。为使企业具有创造性,稻盛和夫主张矫正日本过度的集团主义,建立健全的市民社会。     

徐乾学《明史列传》辨伪

<明史列传>,抄本,93卷,题清徐乾学撰,现藏台湾省中央图书馆.1970年该书作为稀见明代史籍被影印收入屈万里主编的<明代史籍汇刊>中出版,后于1985年再版.     

明末岭南李待问生平与文学

最近,广东省博物馆朱万章先生告知,新发现有李待问扇面书作一件,与原藏佛山一件,所知唯此二种。吉光片羽,弥足珍贵。     

1958-1964年的英国核裁军运动

1958—1964年的英国核裁军运动,是一场以中产阶级为主体的颇具影响力的社会运动。运动的基本目标是反对核军备竟赛,主张推迟、禁止、甚至完全取消英国和其他国家的核试验,削减核军备。它反映了战后英国社会对核武器和核战争前景的恐惧心理。但运动内部,尤其是运动的组织领导者成分复杂,对战争的理解、英国的防务政策以及运动的战略和策略分歧广泛而深刻,从而造成内部协调和合作的困难,最终导致运动的衰落和解体。     

中国国际军备控制政策演变论析

近60年来,中国国际军备控制政策的发展经历了三个阶段:改革开放前坚持立场、独树一帜,长期处于国际军备控制体制之外;改革开放后选择参与、逐步深入;冷战结束后主动融入、广泛参与。近年来军备控制政策的变化及趋向,彰显了中国作为一个负责任的大国建设和谐世界的决心和诚意。