Logistic Population Growth in the World's Largest Cities

This article demonstrates that recent population growth in the world's largest cities has conformed to the general parameters of the logistic process. Using data recently provided by the United Nations, logistic population growth for 485 million-person cities is analyzed at 5-year intervals during 1950–2010, with the UN projections for 2015 adopted as upper limits. A series of ordinary least-squares regression models of increasing complexity are estimated on the pooled data. In one class of models, the logarithms of population proportions are specified to be linear in time, which is the standard approach, but in a second class of models those proportions are specified as being quadratic. The most complex models control logistic growth estimates for (i) city-specific effects (e.g., initial population), (ii) nation-specific effects (e.g., economic development, age distribution of population), and (iii) global coordinates (for unobserved effects). Moreover, the results are segregated according to each city's membership in four different growth clubs, which was an important finding of previous research.     

The Largest Repair of Potala Palace in History

On September 26th 2004,maintenance workers were undertaking their work on the Potala Palace, but this did not affect the enjoyment of foreign and domestic tourists at all.     

辽东半岛全新世最大海侵的考古学观察

全新世以来,我国沿海海岸随着海侵——海退的变化而不断发生变化。从辽东半岛发现的新石器时代诸文化遗存来看,各贝丘遗址出土的海生贝壳反映出这些遗址距离海岸不远。根据这些遗址的分布范围及出土贝壳等遗物,可以看出：辽东半岛东港地区最大的海侵发生在距今6500～5000年,其时间上限可追溯到距今8000年左右。     

China's energy security

As the Chinese energy deficit increases at rates equal to or exceeding its economic growth, energy security raises an alarm among its policy-makers and the international community. This article asks whether China faces any threat to its energy security; and whether China's worldwide quest for energy is a threat to the regional and international stability. The main argument is that while China faces serious challenges in meeting its rising energy demand, its efforts to do so have been primarily domestically focused. In its foreign energy policy, China has behaved like a normal player in the international energy market, buying as much oil as it can and investing in as many places as it can afford. It is unlikely that the country is willing to seek overseas energy supplies at the expense of a peaceful regional and international environment which is a necessary condition for its continuing economic development.     

China's urban geography

"In this paper I seek to review recent work on Chinese urban geography and to appraise the development of China's urban geography as a field of study both inside and outside China. The temporal scope will span scholarship finished and published mainly during the 1980s." The focus is on works published in English. The author examines the primary topics of interest, methodologies and theories, and available sources of data.     

Copper Mines,Chromite Copper Ores and Slags of the Ishkinino Bronze Age Archaeological Microregion,The Southern Urals

The study addresses copper mines structure and composition of copper ores and slags at the Ishkinino archaeological microregion, Orenburg Province. Both ores and slags contain chromites derived from the host ultrabasite rock. Chromites were subdivided into three categories in terms of Cr2O3 content: 45–50%, 50–55%, and 55–61%. The proportions are similar to those observed in chromites of the malachite ores of the Ishkinino cobalt-copper-pyrite deposit. The reguli found in the slag contain copper sul?des and iron phosphides with a high content of nickel. Our results evidence the exploitation of local copper mines in the Late Bronze Age. Finds of chromite ores and slag at the archaeological sites of the Southern Urals are listed, and goals for future research are outlined.     

China's Tibet INDEX 2005

No.: P.FORUMWho Is Managing Tibet?Absurd Worries: Certain People's Reaction toConstruction of Qinghai-Tibet RailwayLies Do Not Hold WaterCOMMENTARYVice-Chairman Radi On Changes in Tibet40 YEARS OF TARAirports in TibetFounding of the TAR as I RecordedBirthday Celebrations of the TARSupernatural FlightGoing to Tibet With the Central GovernmentDelegation On Two OccasionsI Was Once an Interpreter of the Central GovernmentDelegation': Interview With Li Bingquan'Chai…     

China's strategic partnership with Latin America: a fulcrum in China's rise

China has over the last two decades been committed to creating a strategic partnership with Latin American states by persistently extending its economic and political involvement in the continent. China's efforts in this regard reflect not only its desire to intensify its economic cooperation and political relations with nations in Latin America, but also its strategic goals of creating its own sphere of influence in the region and enhancing its ‘hard’ and ‘soft’ power in order to elevate China's status at the systemic level. With access to Latin American markets, resources and investment destinations, China may sustain its economic and social progress that bases its long cherished dream of restoring its past glory of fuqiang (wealth and power) and rise as a global power capable of reshaping the current world system. The enormous economic benefits deriving from their economic cooperation and trade may persuade Latin American nations to accept the basic premise of China's economic strategy: that China's rise is not a threat, but an opportunity to gain wealth and prosperity. This will help China gain more ‘soft’ power in and leverage over its economic partners in Latin America, and thereby help it to rise in the global power hierarchy.     

China's Tibet INDEX 2015

<正>SPECIAL Gallery of the First China Tibet Tourism and Culture International Expo 1:04Looking Forward to Visiting Tibet Againa—An Interview with the PATA Chief Operations Officer 1:12An Ecological Safety Shelter Established on the Snowy Highland 2:04     

探秘“盐”的艺术宫殿——维利奇卡地下盐矿

<正>维利奇卡盐矿到底有多深?维利奇卡盐矿是世界上最老的盐矿之一,曾经给波兰带来了无数辉煌,在14世纪时,盐甚至产出了超过30%的国家收入。1826年到1846年矿中的盐水被用作温泉疗养。在1950年,盐矿的一部分地区被辟为博物馆建设,对外开放。1958年,盐矿的温泉疗养被重新恢复。1978年被列入世界遗产后仍在开采,直到1996年,盐矿停产,盐层被挖尽。而今,维利奇卡盐矿已成为波兰的一大热门景点,也被称为世界上十大奇怪景点之一,本地居民不到2万的维利奇     

关于中国会展旅游的思考

本文通过对“金属旅游”的思考,提出了会展旅游是我国新型的旅游产品的观点,阐述了我国会展旅游产品的性质和特点,以期能为我国旅游企业和会展企业进一步开发和经营会展旅游产品提供有益参考。