Beijing Capital Research Articles

Characterization of volatile organic compounds and the impacts on the regional ozone at an international airport

In this study, the measurement of volatile organic compounds (VOCs) was conducted at Beijing Capital International Airport (ZBAA) and a background reference site in four seasons of 2015. Total concentrations of VOCs were 72.6 ± 9.7, 65.5 ± 8.7, 95.8 ± 11.0, and 79.2 ± 10.8 μg/m3 in winter, spring, summer, and autumn, respectively. The most abundant specie was toluene (10.1%–17.4%), followed by benzene, ethane, isopentane, ethane, acetylene, and n-butane. Seasonal variations of VOCs were analyzed, and it was found that the highest concentration occurring in summer, while the lowest in spring. For the diurnal variation, the concentration of VOCs in the daytime (9:00–15:00) was less than that at night (15:00–21:00) obviously. Ozone Formation Potential (OFP) was calculated by using Maximum Incremental Reactivity (MIR) method. The greatest contribution to OFP from alkenes and aromatics, which accounted for 27.3%–51.2% and 36.6%–58.6% of the total OFP. The WRF-CMAQ model was used to simulate the impact of airport emissions on the surrounding area. The results indicated that the maximum impact of VOCs emissions and all sources emissions at the airport on O3 was 0.035 and −23.8 μg/m3, respectively. Meanwhile, within 1 km from the airport, the concentration of O3 around the airport was greatly affected by airport emitted.

The Impact of Green Taxiing Systems Using on Airport

The aircraft’s engine isn’t designed for taxiing on the ground. This article describes the green taxiing systems and compares their advantages and disadvantages. Setting the Beijing Capital International Airport as an example, the taxiing fuel consumption and pollutant emissions calculation model were established. This paper calculates the total fuel consumption and pollutant emissions of the different modes in one year. The results show that the green taxiing systems can significantly reduce fuel consumption and HC, CO, CO2, NOx emissions. TaxiBot is better for reducing fuel consumption and NOx emissions.

Characterization of aircraft dynamic wake vortices and atmospheric turbulence by coherent doppler lidar

Field observations for the wake vortices by Coherent Doppler Lidar (CDL) have been carried out at the Beijing Capital International Airport (BCIA) and Tianjin Binhai International Airport (TBIA) to investigate the wake vortices evolution characteristics and the near-ground effect. This paper introduces the dynamic wake vortices and atmospheric turbulence monitoring technique, successfully demonstrating that the CDL can capture the key characteristics of wake vortices in real-time, including wake vortices intensity, spatial-temporal evolution and so forth.

Airport low-level wind shear lidar observation at beijing capital international airport

Ocean University of China lidar team operated a pulse coherent Doppler lidar (PCDL) for the low level wind shear monitoring at the Beijing Capital International Airport (BCIA) in 2015. The experiment configuration, observation modes is presented. A case study shows that the low level wind shear events at the southern end of 18R/36L runway were mainly caused by the trees and buildings along the glide path under strong northwest wind conditions.

Nested logit model formation to analyze airport parking behavior based on stated preference survey studies

The rapid growth of private car ownership and utilization has resulted in significant parking-related congestion problems at large-scale international airports. Parking facilities located in the peripheral areas of airports could be more efficiently used to mitigate congestion and reduce delays due to dramatically increasing traffic demands and inferiorly designed parking lot configurations. In order to analyze the travelers' parking choice preferences for the off-site airport parking activities, a stated preference survey study was conducted around Terminal 3 at Beijing Capital International Airport. Two nested logit models were formulated to analyze the correlation between travelers' parking behavior and their travel characteristics. The research results indicate that travelers prefer to choose off-site parking facilities for long-term parking. A free and fast operation of connections should be provided in consideration of the long-distance layouts of parking facilities. A classification analysis of travelers with different preferences was conducted and the potential changes in travelers' parking choices to off-site parking lots were quantified. The research findings are helpful for traffic management agencies to develop practical guidelines for the establishment of new parking facilities with multiple access points at airports.

A study of aerosol properties based on observations of particulate matter from the U.S. Embassy in Beijing, China

AbstractThe United States Embassy in Beijing, China publicly released a record of mass concentrations of particulate matter 2.5 µm and smaller in aerodynamic diameter (PM2.5), from April 2008 to the present, measured with a beta attenuation monitor (BAM). We compare these measurements with observations of particulate matter recorded at the Beijing Institute of Atmospheric Physics and observations of visibility recorded at the Beijing Capital International Airport (BCIA) to assess their value as a record of air quality in the greater Beijing metropolitan area. We find that the PM2.5 observations correlate well with the other observations of particulate matter (PM) over the period 1 January–1 February 2013 using a tapered element oscillating microbalance and an aerosol mass spectrometer (AMS), and they exhibit a clear inverse correlation with visibility measured at BCIA. Using inverse visibility as a proxy of radiation extinction, we determine a dry mass extinction efficiency and a dependence of radiation extinction on relative humidity, which is consistent with other studies of polluted urban environments. We deduce a strong degree of homogeneity of particulate pollution across the Beijing metropolitan region and conclude that the U.S. Embassy measurements are a reliable sample of this particulate pollution during periods of photochemical smog. The U.S. Embassy observations of PM2.5 appear to remain consistent throughout the available record and can serve as a useful dataset for studying future trends in particulate matter as China implements ambitious measures to improve air quality in the region.

An evolutionary approach for dynamic single-runway arrival sequencing and scheduling problem

Aircraft arrival sequencing and scheduling is a classic problem in the air traffic control to ensure safety and order of the operations at the terminal area. Most of the related studies have formulated this problem as a static case and assume the information of all the flights is known in advance. However, the operation of the terminal area is actually a dynamic incremental process. Various kinds of uncertainties may exist during this process, which will make the scheduling decision obtained in the static environment inappropriate. In this paper, aircraft arrival sequencing and scheduling problem is tackled in the form of a dynamic optimization problem. An evolutionary approach, namely dynamic sequence searching and evaluation, is proposed. The proposed approach employs an estimation of distribution algorithm and a heuristic search method to seek the optimal landing sequence of flights. Compared with other related algorithms, the proposed method performs much better on several test instances including an instance obtained from the real data of the Beijing Capital International Airport.

Achieving the delicate balance between risks & outcomes in a large-scale IT project – a case study on BCIA's airport security system

This teaching case describes the journey undertaken by the Beijing Capital International Airport's IT department in the implementation of various large-scale IT projects during the construction of the Terminal 3 project. The case specifically singled out the Airport Security system in the Terminal 3 project and provided a detailed description on its implementation. Airport security has always been one of the key concerns in all Airport management activities. In recent times, Airport security has become a hot topic especially given the increasing threats posted by terrorists (e.g., 9/11 incident and MH370). The case portrays Mr. Roland Lee, the project manager of the Airport Security system, as the central protagonist confronting the various challenges in balancing the risks and the requirements to keep the project on time, on budget and of high quality.

Aircraft Wake Vortex Measurement with Coherent Doppler Lidar

Aircraft vortices are generated by the lift-producing surfaces of the aircraft. The variability of near-surface conditions can change the drop rate and cause the cell of the wake vortex to twist and contort unpredictably. The pulsed Coherent Doppler Lidar Detection and Ranging is an indispensable access to real aircraft vortices behavior which transmitting a laser beam and detecting the radiation backscattered by atmospheric aerosol particles. Experiments for Coherent Doppler Lidar measurement of aircraft wake vortices has been successfully carried out at the Beijing Capital International Airport (BCIA). In this paper, the authors discuss the Lidar system, the observation modes carried out in the measurements at BCIA and the characteristics of vortices.

Mapping and characterization of land subsidence in Beijing Plain caused by groundwater pumping using the Small Baseline Subset (SBAS) InSAR technique

Abstract. InSAR time series analysis is widely used for detection and monitoring of slow surface deformation. In this paper, 15 TerraSAR-X radar images acquired in stripmap mode between 2012 and 2013 are processed for land subsidence monitoring with the Small Baseline Subset (SBAS) approach in Beijing Plain in China. Mapping results produced by SBAS show that the subsidence rates in the area of Beijing Plain range from −97.5 (subsidence) and to +23.8 mm yr−1 (uplift), relative to a presumably stable benchmark. The mapping result also reveals that there are the five subsidence centers formed by surface deformation spreading north to south east of the downtown. An uneven subsidence patten was detected near the Beijing Capital International Airpor, which may be related to loading of buildings and the aircraft.

Data Processing in Beijing Capital International Airport Regional Economic Impact Assessment and Overall Analysis

In this paper, the direct impact, indirect impact and induced impact are used to analysis the economic benefit of the Beijing Capital International Airport (BCIA). The representative airports, Atlanta Airport, Dallas-Fort Worth Airport and John F. Kennedy International Airport are selected to compare with the BCIA in the aspects of total impact and direct impact. Some foreign organizations regularly measure certain areas’ economic and social impact generated by the airports. BCIA is compared with a series of areas in Asia Pacific and the UK in several respects.

(China's Green Growth Strategy and Implications for Trade between Korea and China)

(China's Green Growth Strategy and Implications for Trade between Korea and China)

Oxidative capacities of size-segregated haze particles in a residential area of Beijing

The frequent haze days around the Chinese capital of Beijing in recent years have aroused great attention owing to the detrimental effects on visibility and public health. To discover the potential health effects of the haze, oxidative capacities of airborne particles collected in Beijing during haze and clear days were comparably assessed by a plasmid scission assay. Eleven water-soluble trace elements (As, Cd, Cr, Cu, Mn, Ni, Pb, V, Se, Tl, and Zn) in the size-segregated airborne particles were quantitatively analyzed by inductively coupled plasma mass spectrometry, and most of the water-soluble trace elements were found to mainly concentrate in the fine particle size of 0.56–1.0 μm. In comparison with clear days, the mass concentrations of 11 analyzed water-soluble trace elements remarkably increased during haze days, and the oxidative capacities determined by the plasmid scission assay were markedly elevated accordingly during the haze days under the same dosage of particles as for those during clear days. Water-soluble trace elements in airborne particles, such as Cu, V, and particularly Zn, were found to have significantly positive correlations with the plasmid DNA damage rates. Because Cu, V, and Zn have been considered as bioavailable elements, the evident increase of these elements during haze days may be greatly harmful to human health.

China's Green Growth Strategy and Implications for Trade between Korea and China

China's Green Growth Strategy and Implications for Trade between Korea and China

Developing the Agile IS Development Practices in Large-Scale IT Projects: The Trust-Mediated Organizational Controls and IT Project Team Capabilities Perspectives

This paper is based on multiple case studies on the construction of the Beijing Capital International Airport Terminal 3 in preparation for the 2008 Olympic Games that investigated the processes of instilling agile IS development practices in large-scale IT projects. This study develops useful theoretical constructs that will help researchers and practitioners who wish to learn about agile IS development practices as developed in large-scale IT projects. Adopting a contingent view, we uncover four factors that are critical in this development processes, namely: project uncertainty profile and project completion urgency; IT project team capabilities; organizational control mechanisms; and trust relationships among the IT project team, the vendors, and the users. Depending on the unpredictable nature of the project and the trust level among the IT project team, the vendors, and the users, we have uncovered the IT project team capabilities and the organizational control mechanisms that are needed to assure the success of a large-scale IT project. We posit that the interplay between the IT project team capabilities and the trust-mediated organizational control mechanisms forms the theoretical basis that defines agile IS development practice in large-scale IT projects. We argue that our findings provide insights to practitioners who are attempting to introduce agile IS development practices into any large-scale IT project. From a research perspective, the theory developed in this paper also sheds light on the importance of adopting a contingency view when researching agile IS development practices in a large-scale IT project and the factors to consider. This underpinning theoretical perspective will aid in the design of all future researches.

Developing a Prototype Earthquake Early Warning System in the Beijing Capital Region

The Beijing capital region (36°N–42°N, 113.5°E–120°E) is located in northern China and includes Beijing City, Tianjin City, and Hebei Province. This region of critical economic and cultural importance is threatened by large earthquakes. Historical earthquake records show that this region has been struck by many strong-to-great earthquakes (see Figure 1), with magnitudes up to M 8 (the 1679 Sanhe-Pinggu earthquake). In the 20th century, the 1976 M 7.8 Tangshan earthquake caused more than 240,000 fatalities and uncountable economic losses. Developing an earthquake early warning system (EEWS) in this region is therefore of great importance and necessity. This necessity was dramatically highlighted by the disastrous Wenchuan earthquake in 2008. After the Wenchuan earthquake, a news media report that Japanese seismologists could “predict” an earthquake several seconds before its occurrence caused a lot of discussion in China. This was actually a misunderstanding of the EEWS performance during the Iwate-Miyagi Nairiku earthquake on 14 June 2008, about one month after the Wenchuan earthquake, but the importance of EEWS in earthquake disaster mitigation has become more and more evident. Accordingly, the China Earthquake Administration (CEA) was motivated to configure a nationwide EEWS. EEW systems have recently been developed in many countries and regions, such as Japan (Nakamura 1988, 1996, 2004; Horiuchi et al. 2005; Nakamura and Saita 2007; Hoshiba et al. 2008; Brown et al. 2009; Kamigaichi et al. 2009), southern California (Allen and Kanamori 2003; Wu et al. 2007; Bose et al. 2008; Allen, Brown et al. 2009; Bose et al. 2009; Cua et al. 2009; Kohler et al. 2009), Mexico (Espinosa-Aranda et al. 1995; Goltz and Flores 1997; Espinosa-Aranda et al. 2009; Suarez et al. 2009), Taiwan (Wu and Teng 2002; Hsiao et al. 2009 …

Temperature Distribution in a Long-Span Aircraft Hangar

Long-span aircraft hangars have features which differ from other large structural systems. The temperature stresses due to temperature variations often greatly impact the mechanical performance of the structure. The paper presents an analysis of the heat transfer processes and factors which influence the temperature distribution. The AMECO-A380 aircraft hangar at the Beijing Capital International Airport was selected as a practical example to illustrate the use of finite volume analysis to calculate the temperature field taking into account meteorological conditions, solar radiation, heat convection, etc. The temperature distribution and the variation of the length of the upper and lower chords of the grid structure roof were analyzed to develop guidelines for the temperature distributions in very large aircraft hangars. The results show that the temperature effect will be large for long-span hangars, and the temperature stresses due to non-uniform temperatures should be analyzed to guarantee the structural safety of large aircraft hangars.

Intravenous Iron Sucrose in Peritoneal Dialysis Patients with Renal Anemia

To explore the safety and efficacy of intravenous (IV) iron sucrose in maintenance peritoneal dialysis (PD). Randomized, controlled, parallel-group single-center trial. Blood Purification Center of Chaoyang, Beijing Capital University of Medical Science, China. 46 patients on PD were involved in this trial. 26 patients received IV iron sucrose (200 mg iron) once per week for 4 weeks then once every other week for a further 4 weeks. The other 20 patients received oral ferrous succinate, 200 mg three times per day, for 8 weeks. Hemoglobin, hematocrit, serum ferritin (SF) level, and transferrin saturation (TSAT) were assessed at baseline and then again after 2, 4, and 8 weeks of treatment. There were no differences between the IV and oral groups in terms of sex, age, duration of PD, mean dialysate dosage per day, erythropoietin dosage per week, or hematological parameters at baseline. After 4 and 8 weeks of treatment, mean Hb and Hct were significantly increased in the IV group and were also significantly higher than those in the oral group. Levels of SF and TSAT were also significantly increased in the IV group, and significantly higher than in the oral group. After 8 weeks, the response rate in the IV group was 94.8%, which was significantly higher than that in the oral group. The mean erythropoietin dose was significantly lower in the IV group than in the oral group. Hb, Hct, SF, and TSAT levels were maintained between 4 and 8 weeks in the IV group despite the decrease in dose frequency. There were no adverse events with IV iron. Eight patients in the oral group had adverse gastrointestinal effects. IV iron sucrose is safe in PD patients. It increases Hb levels and serum iron parameters more effectively than oral iron; it is well tolerated and can permit reductions in the required dose of erythropoietin.

Construction of Deep Foundation Engineering for Beijing Capital Building

Construction of Deep Foundation Engineering for Beijing Capital Building

Rickshaw Beijing: city people and politics in the 1920s

In the 1920s, revolution, war, and imperialist aggression brought chaos to China. Many of the dramatic events associated with this upheaval took place in or near China's cities. Bound together by rail, telegraph, and a shared urban mentality, cities like Guangzhou, Shanghai, and Beijing formed an arena in which the great issues of the day - the quest for social and civil peace, the defense of popular and national sovereignty, and the search for a distinctively modern Chinese society - were debated and fought over. People were drawn into this conflicts because they knew that the passage of armies, the marching of protesters, the pontificating of intellectual, and the opening and closing of factories could change their lives. David Strand offers a penetrating view of the old walled capital of Beijing during these years by examining how the residents coped with the changes wrought by itinerant soldiers and politicians and by the accelerating movement of ideas, capital, and technology. By looking at the political experiences of ordinary citizens, including rickshaw pullers, policemen, trade unionists, and Buddhist monks, Strand provides fascinating insights into how deeply these forces were felt. The resulting portrait of early twentieth-century Chinese urban society stresses the growing political sophistication of ordinary people educated by mass movements, group politics, and participation in a shared, urban culture that mixed opera and demonstrations, newspaper reading and teahouse socializing. Surprisingly, in the course of absorbing new ways of living, working, and doing politics, much of the old society was preserved - everything seemed to change and yet little of value was discarded. Through tumultuous times, Beijing rose from a base of local and popular politics to form a bridge linking a traditional world of guilds and gentry elites with the contemporary world of corporatism and cadres.