Building a Memory Map to Reconstruct an Urban Memory: The Case of the Beijing City Gates

2020 ◽  
Vol 69 (1) ◽  
pp. 76-100
Author(s):  
Li Niu ◽  
Lichao Liu ◽  
Chenxiang Gao ◽  
Xiaoshuang Jia
Keyword(s):  
Beijing City ◽  
City Gates

scholarly journals Application of genetic programming to modeling pipe failures in water distribution systems

2010 ◽  
Vol 13 (3) ◽  
pp. 419-428 ◽  
Author(s):  
Qiang Xu ◽  
Qiuwen Chen ◽  
Weifeng Li
Keyword(s):  
Genetic Programming ◽  
Distribution System ◽  
Distribution Systems ◽  
Water Distribution ◽  
Pipe Failure ◽  
Beijing City ◽  
Failure Data ◽  
Processing Strategies ◽  
Gis Data ◽  
Failure Models

The water loss from a water distribution system is a serious problem for many cities, which incurs enormous economic and social loss. However, the economic and human resource costs to exactly locate the leakage are extraordinarily high. Thus, reliable and robust pipe failure models are demanded to assess a pipe's propensity to fail. Beijing City was selected as the case study area and the pipe failure data for 19 years (1987–2005) were analyzed. Three different kinds of methods were applied to build pipe failure models. First, a statistical model was built, which discovered that the ages of leakage pipes followed the Weibull distribution. Then, two other models were developed using genetic programming (GP) with different data pre-processing strategies. The three models were compared thereafter and the best model was applied to assess the criticality of all the pipe segments of the entire water supply network in Beijing City based on GIS data.

scholarly journals Impact of crop field burning and mountains on heavy haze in the North China Plain: A case study

2016 ◽  
Author(s):  
X. Long ◽  
X. X. Tie ◽  
J. J. Cao ◽  
R. J. Huang ◽  
T. Feng ◽  
...  
Keyword(s):  
Air Pollution ◽  
North China Plain ◽  
North China ◽  
Wind Condition ◽  
Beijing City ◽  
The North ◽  
The North China Plain ◽  
Crop Field ◽  
The Impact ◽  
Field Burning

Abstract. Crop field burning (CFB) has important effects on air pollution in China, but it is seldom quantified and reported in a regional scale, which is of great importance for the control strategies of CFB in China, especially in the North China Plain (NCP). With the provincial statistical data and open crop fires captured by satellite (MODIS), we extracted a detailed emission inventory of CFB during a heavy haze event from 6th to 12th October 2014. A regional dynamical and chemical model (WRF-Chem) was applied to investigate the impact of CFB on air pollution in NCP. The model simulations were compared with the in situ measurements of PM2.5 (particular matter with radius less than 2.5 μm) concentrations. The model evaluation shows that the correlation coefficients (R) between measured and calculated values exceeds 0.80 and absolute normalized mean bias (NMB) is no more than 14 %. In addition, the simulated meteorological parameters such as winds and planetary boundary layer height (PBLH) are also in good agreement with observations. The model was intensive used to study (1) the impacts of CFB and (2) the effect of mountains on regional air quality. The results show that the CFB occurred in southern NCP (SNCP) had significant effect on PM2.5 concentrations locally, causing a maximum of 35 % PM2.5 increase in SNCP. Because of south wind condition, the CFB pollution plume is subjective a long transport to northern NCP (NNCP-with several mega cities, including Beijing of the capital city in China), where there are no significant CFB occurrences, causing a maximum of 32 % PM2.5 increase in NNCP. As a result, the heavy haze in Beijing is enhanced by the CFB occurred in SNCP. Further more, there are two major mountains located in the western and northern NCP. Under the south wind condition, these mountains play important roles in enhancing the PM2.5 pollution in NNCP through the blocking and guiding effects. This study suggests that the PM2.5 emissions in SNCP region should be significantly limited in order to reduce the occurrences of heavy haze events in NNCP region, including the Beijing City.

THE ATTEMPTS TO TRANSFER THE GENEVAN ACADEMY TO IRELAND AND TO AMERICA, 1782–1795

2013 ◽  
Vol 56 (2) ◽  
pp. 345-368 ◽  
Author(s):  
JENNIFER POWELL MCNUTT ◽  
RICHARD WHATMORE
Keyword(s):  
North America ◽  
French Revolution ◽  
The United States ◽  
Popular Government ◽  
City Gates ◽  
Independent States ◽  
Irish Case ◽  
Republican Liberty ◽  
Religious Nature ◽  
The French Revolution

ABSTRACTEarly in 1782, republican rebels in Geneva removed the city's magistrates and instituted a popular government, portraying themselves as defenders of liberty and Calvinism against the French threats of Catholicism and luxury. But on 1 July 1782, the republicans fled because of the arrival at the city gates of invading troops led by France. The failure of the Genevan revolution indicated that while new republics could be established beyond Europe, republics within Europe, and more especially Protestant republics in proximity to larger Catholic monarchies, were no longer independent states. Many Genevans sought asylum across Europe and in North America in consequence. Some of them looked to Britain and Ireland, attempting to move the industrious part of Geneva to Waterford. During the French Revolution, they sought to establish a republican community in the United States. In each case, a major goal was to transfer the Genevan Academy established in the aftermath of Calvin's Reformation. The anti-religious nature of the French Revolution made the attempt to move the Academy to North America distinctive. By contrast with the Irish case, where religious elements were played down, moving the Academy to North America was supported by religious rhetoric coupled with justifications of republican liberty.

scholarly journals Regimes of rainfall preceding regional rainfall events over the plain of Beijing City

2018 ◽  
Vol 38 (13) ◽  
pp. 4979-4989 ◽  
Author(s):  
Weihua Yuan ◽  
Hang Xu ◽  
Rucong Yu ◽  
Jian Li ◽  
Yingxin Zhang ◽  
...  
Keyword(s):  
Beijing City ◽  
Rainfall Events ◽  
Regional Rainfall

Holopogon pekinensis (Orchidaceae), a new heteromycotrophic species from Northern China

Phytotaxa ◽  
2017 ◽  
Vol 326 (2) ◽  
pp. 151
Author(s):  
XIAN-YUN MU ◽  
BING LIU ◽  
YI-XUAN ZHU ◽  
LING TONG ◽  
QIN-WEN LIN ◽  
...  
Keyword(s):  
New Species ◽  
Endangered Species ◽  
Conservation Status ◽  
Far East ◽  
Northern China ◽  
Identification Key ◽  
Beijing City ◽  
East Russia ◽  
Light Green

Holopogon pekinensis, a new heteromycotrophic orchid from Beijing City, China, is described and illustrated. This new species is morphologically similar to an endangered species endemic to Far East Russia, Holopogon ussuriensis Komarov & Nevski, but differs in having green flowers (vs white) and light green pubescence (vs red). Its conservation status and an identification key to Holopogon are provided.

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