Transactions of Nanjing University of Aeronautics and Astronautics Information for Contributors

Transactions of Nanjing University of Aeronautics&Astronautics (TNUAA) is a bimonthly journal facing international academic community.Emphasizing prompt and effective dissemination of key data and new scientific insights,TNUAA publishes experimental and theoretical papers bearing on applications to all branches of aeronautics, astronautics and civil aviation.

IEC Promotion Center (Nanjing) signs an agreement with State Grid Fujian Electric Power

The IEC Promotion Center(Nanjing)signed a development cooperation agreement with State Grid Fujian Electric Power Co.,Ltd.on April 23 in Nanjing city,Jiangsu province.The signing ceremony was witnessed by Shu Yinbiao,the 36th President of IEC,Academician of Chinese Academy of Engineering,and President of Chinese Society for Electrical Engineering,Ruan Qiantu,Chair of the Board and Party Secretary of State Grid Fujian Electric Power Co.,Ltd.,Shan Shewu,Chair of the Board and Party Secretary of NARI Group,as well as Fan Xiangqian and Yu Qing,Director and Deputy Director of Management Committee of Nanjing Chilin Technology Innovation Park.

Bird Resources and Avifauna of Zijin Mountain in Nanjing

The survey of bird species in Zijin Mountain area of Nanjing were conducted from September 2005 to April 2007.A total of 164 species belonging to 15 orders and 44 families were recorded,including 59 resident birds,34 summer migrants,41 winter migrants,29 passing birds,and one vagrant bird.There were 25 species listed as key protected wild animal species in China,and 56 species in key protected birds in Jiangsu Province.The avifauna was composed of Palaearctic realm species(51.22%),Oriental realm species(40.24%)and cosmopolitan species(8.54%),showing the characteristics of north-south transition.In summary,there are abundant bird species in Zijin Mountain,but with low population number and density.

TONIGHT,WE ARE YOUNG--‘New Youth,New Future’Asian Youth Music Festival rocks Nanjing

The“New Youth,New Future”Asian Youth Music Festival kicked off in Nanjing,capital of east China’s Jiangsu Province,on October 28.Talented young artists,bands,and singers from China,Japan,the ROK,and ASEAN countries gathered to share a stage and be part of a youth musical and cultural feast dedicated to peace and friendship.The festival attracted more than 20,000 spectators.

Influence of artificial freezing onliquefaction characteristics of Nanjing sand

Purpose–This study purposes to study the influence of artificial freezing on the liquefaction characteristics of Nanjing sand,as well as its mechanism.Design/methodology/approach–was studied through dynamic triaxial tests by means of the GDS dynamic triaxial system on Nanjing sand extensively discovered in the middle and lower reaches of the Yangtze River under seismic load and metro train vibration load,respectively,and potential hazards of the two loads to the freezing construction of Nanjing sand were also identified in the tests.Findings–The results show that under both seismic load and metro train vibration load,freeze-thaw cycles will significantly reduce the stiffness and liquefaction resistance of Nanjing sand,especially in the first freezethaw cycle;the more freeze-thaw cycles,the worse structural behaviors of silty-fine sand,and the easier to liquefy;freeze-thaw cycles will increase the sensitivity of Nanjing sand’s dynamic pore pressure to dynamic load response;the lower the freezing temperature and the effective confining pressure,the worse the liquefaction resistance of Nanjing sand after freeze-thaw cycles;compared to the metro train vibration load,the seismic load in Nanjing is potentially less dangerous to freezing construction of Nanjing sand.Originality/value–The research results are helpful to the construction of the artificial ground freezing of the subway crossing passage in the lower reaches of the Yangtze River and to ensure the construction safety of the subway tunnel and its crossing passage.

Influence of Atmospheric Particulate Matter on Ozone in Nanjing,China:Observational Study and Mechanistic Analysis

Particulate matter with diameters of 2.5 μm or smaller(PM_(2.5)) and ozone(O_3) are major pollutants in the urban atmosphere. PM_(2.5) can affect O_3 by altering the photolysis rate and heterogeneous reactions. However, these two processes and their relative importance remain uncertain. In this paper, with Nanjing in China as the target city, we investigate the characteristics and mechanism of interactions between particles and O_3 based on ground observations and numerical modeling.In 2008, the average concentrations of PM_(2.5) and O_3 at Caochangmen station are 64.6 ± 47.4 μg m^(-3) and 24.6 ± 22.8 ppb,respectively, while at Pukou station they are 94.1 ± 63.4 μg m^(-3) and 16.9 ± 14.9 ppb. The correlation coefficient between PM_(2.5) and O_3 is -0.46. In order to understand the reaction between PM_(2.5) and O_3, we construct a box model, in which an aerosol optical property model, ultraviolet radiation model, gas phase chemistry model, and heterogeneous chemistry model,are coupled. The model is employed to investigate the relative contribution of the aforementioned two processes, which vary under different particle concentrations, scattering capability and VOCs/NOxratios(VOCs: volatile organic compounds;NOx: nitric oxide and nitrogen dioxide). Generally, photolysis rate effect can cause a greater O_3 reduction when the particle concentrations are higher, while heterogeneous reactions dominate O_3 reduction with low-level particle concentrations.Moreover, in typical VOC-sensitive regions, O_3 can even be increased by heterogeneous reactions. In Nanjing, both processes lead to O_3 reduction, and photolysis rate effect is dominant. Our study underscores the importance of photolysis rate effect and heterogeneous reactions for O_3, and such interaction processes should be fully considered in future atmospheric chemistry modeling.

Effects of Community Community Communication Technology(ICT) Usage on Community Satisfaction: Case Study in Nanjing, China

Future or smart community, which mainly refers to the development of community information and communication technology(ICT) platforms or devices, has received considerable attention from urban governments and scholars. However, only a few studies have been conducted to test the actual effects of using these community ICT platforms or devices on the community satisfaction of residents. Therefore, the present study conducts a survey in 40 communities in Nanjing, China and uses a mixed linear regression model to determine the relationship between community ICT usage and community satisfaction. Results indicate that residents with high-level community ICT usage are more satisfied with their community than those with low-level community ICT usage. Moreover, evident differences are observed regarding the influence of new commodity, old commodity and affordable housing communities in Nanjing. These findings are meaningful for the construction and development of future communities.

Spatial Characteristics and Influencing Factors of Urban Resilience from the Perspective of Daily Activity:A Case Study of Nanjing,China

Based on the connotation of urban resilience and the main contradictions of China's urbanization,urban resilience is placed within the main daily activities contradictory scene of the urban man-land system to build a theoretical framework of urban activity resilience.Relying on geographic big data,this study identifies the spatial characteristics of activity resilience,reveals the impact of activity environment on activity resilience in Nanjing,and proposes countermeasures.The main conclusions are as follows.1)Activity resilience presents a composite spatial structure of circles and clusters,and most areas are resilient but at a low level.2)There are significantly positive and negative global autocorrelation between activity resilience and activity scale,and activity stability.Simultaneously,there also exists a local spatial autocorrelation with the opposite positive and negative trends.3)Activity environment has a significant effect on activity resilience,and the degree and direction of influence among different dimensions and regions are heterogeneous.4)For activity resilience,it is necessary to increase the matching degree between the scale and stability of activities,and reduce the excessive concentration and flow of activities.For the activity environment,it is necessary to improve the accessibility of the ecological environment,strengthen the high-quality supply of the infrastructure environment,optimize the balance of the location environment,and promote the inclusiveness of the social environment.

Genotypic Analysis of Heading Time on an Indica Rice Cultivar,Nanjing 11

In this paper, the genotype of heading time in Nanjing 11, an indica variety, was analyzed bycrossing with tester varieties, Akihikari ( e1e1 e2e2 e3e3 Se1eSe1e ), Koshihikari ( E1E1E2E2 e3e3 Se1eSe1e ), Nipponbare(E1E1 e2e2 e3e3 Se1Se1 )and Hinohikari(E1E1 E2E2 e3e3 Se1Se1 ), of which the genotypes of headingtime were well known. The results showed genotype of heading time in Nanjing 11 was E1E1 e2e2 E3E3 Se1Se1and also included a recessive inhibitor I-Se1 for photoperiod-sensitivity as well. Meanwhile, the two photoperiod-sensitive genes, E1 and Se1, in Nanjing 11 were also identified by crossing with QTL nearly isogenic lines of Nipponbare, NIL( Hd1 )and NIL( Hd4 )which have complementary effects.

Residents' Collective Memory of Urban Street and Lane Spaces:A Case Study of the Confucius Temple Block in Nanjing City

Along with the rapid globalization and urbanization,primitive ecological environment and cultural life atmosphere of urban streets and lanes have degraded,memories of the city have been lost,and cities have shown the tendency of convergence and homogenization.Taking the Confucius Temple Block for example,this paper applied cognitive map,oral interview and GIS spatial statistics to study residents' col ective memories of urban street and lane spaces,and found that the locals' collective memories of streets and lanes in the Confucius Temple Block declined gradually in the sequence of "aura area" → "secondary aura area" → "buffer area" → "blind spot area",and "civilian" urban design concept was claimed as the major incentive of the decline.Streets and lanes as important components of urban public spaces have specific historical connotations and genius loci,and they deserve wide concern from the academic circle and the society for their function of protecting collective memories of residents.

URBAN REGIONAL STRUCTURES TRANSFORMATION AND SUSTAINABLE DEVELOPMENT: CASE STUDY OF NANJING MEGALOPOLIS

s: Since 1978, many changes have happened on the background of urban regional structure in China, such as the economy system restructuring, the social transforming including the population flow accelerating and social demand diversifying and individualizing, the political and economic systems reforms, the rise of the real estate market and the changing relationship between human and nature. From the macroscopic view, these changes make the national urban system to be a newer pattern with a widening gap among the cities in spite of the rising of the cities as a whole. At the same, the urban land use structures are changing with both the trends of intensification and diversification, and the trends of the regional diversification and the economic integration. Besides, urban structures with multiple centers are emerging in several metropolitan areas in China. These changes and trends mentioned above are confirmed by a case study of Nanjing City, a growing metropolitan area in east China. The case study also points out some problems in urban regional structure reforming, especially the poor social and ecological considerations. We should pay more attention to some ideas like balance of intensification and decentralization, development of suburban centers and a reasonable mixing of the functional activities to develop a sustainable urban regional structure.

HIGH SPEED WIND TUNNEL WALL INTERFERENCE RESEARCH PROGRESS AT NANJING AERONAUTICAL INSTITUTE

Some progress in high speed wind tunnel wall interference research has been made at Nanjing Aeronautical Institute. It includes the efforts in looking for better ventilated wall designs to reduce the wall interference effects and developing some wall interference assessment / correction (WIAC) procedures to assess or correct the wall interference effects. The perforated wall with 60-deg inclined holes which has continuously variable porosity from zero to 9% and the slotted wall which has continuously variable open-area ratio from zero to 7% are used to lessen the wall interference in transonic and subsonic tests. Linear and nonlinear 2-dimensional WIAC procedures and 3-dimensional WIAC procedures were developed. The procedures use measured wall pressure data to correct the wall interference effects or judge whether the wall interference effects are correctable. They do not require any explicit knowledge about the wall cross-flow characteristics. They can be applied for 2D airfoil tests and 3D half or

PALEO-ENVIRONMENTAL RECONSTRUCTION DURING THE PERIOD OF NANJING HOMO ERECTUS

Using five group dating of the fossil by Uranium series age method shows that the age of Nanjing Homo Erectus is between 280－ 430 ka B. P. Combining with the analysis of fossil mammalian form Stegodon, Sus.Lydekkeri Zdansly, M.pachyosteus Young, P.grayi Zdansky and E.SanmeniensisTeilhard et Pive teau, which are located in the same stratum, the authors thinks that the Nanjing Homo Erectus may have lived in the late Mid Pleistocene (about 350 ka B.P.). Based upon the spores and pollen in the cave sediments of the area, we can find that most of spores and pollen are subtropical and warm temperature types. For instance, broad leaf trees which are fond of warm climate, including Cunning hamia, Jsuga and Pinus ,as well as Morus, Carpinus and Ptendium. Among the above spores and pollen, only Tsuga,Liquidambar, Betula,Ulmus and Salix are the remainders of Humid hot environment from the Tertiary period. Above evidences illustrate that the living environment of the Nanjing Homo Erectus not only was not cloder but also was not drier than the Peking Man’s. It could be said that dry climate and the ice age of the Mid Pleistocene didn’t undergo this area.As for the manner of the Homo Erectus’s making stone artifact and using fire, because now we have not found the evidence of the stone artifact and the ash, the futher excavation to the talus of the Huludong cave should be needed.

RESIDENTIAL SPACE DIFFERENTIATION OF NANJING METROPOLIS AND ITS DYNAMIC MECHANISM IN 1912-1998

Since 1978, within social geographic pattern of Chinese metropolis, differentiation not only has come to be in social entity,. but also by some degree embodied within residential space. Through the 8tudy on spatial segregation, the authors implicate these above spatial differentiation from social polarization to residential segregation cause by change in the political economy, in the organization of urban and real estate development (from project-specific to comprehensive development and real estate development) and in the functions and value of urban planning (from a sectional-subordinated to a municipally based control). The imprints of transition on social space are illustrated eight references to the example of Nanjing metropolis. Among the new phenomenal identified here are the six types of residential area according to soci-economic status.

Transactions of Nanjing University of Aeronautics & Astronautics Information for Contributors

Transactions of Nanjing University of Aeronautics&Astronautics (TNUAA) is a bimonthly journal facing international academic community. Emphasizing prompt and effective dissemination of key data and new scientific insights, TNUAA offers publication of new experimental and theoretical papers bearing on applications to all branches of aeronautics, astronautics and civil aviation.

Transactions of Nanjing University of Aeronautics & Astronautics Information for Contributors

Transactions of Nanjing University of Aeronautics & Astronautics (TNUAA) is a bimonthly journal facing international academic community.Emphasizing prompt and effective dissemination of key data and new scientific insights,TNUAA offers publication of new experimental and theoretical papers bearing on applications to all branches of aeronautics,astronautics and civil aviation.

Undrained dynamical behavior of Nanjing flake-shaped fine sand under cyclic loading

A series of dynamic behavior tests on Nanjing flake-shaped fine sand were performed by using the WFI cyclic triaxial apparatus made in England. The dynamic behaviors of Nanjing flake-shaped fine sand under different static deviator stress levels and cyclic stress ratios were studied. Through comparing the effective stress path under cyclic loading with static loading, the processes of liquefaction of saturated Nanjing flake-shaped fine sand with development of dynamic pore-water pressure, including the initial compact state, compression state and dilative state, were investigated. The variation of the shear stiffness with the number of cycles and cyclic strain was investigated by analyzing the secant shear modulus in each unload-reload loop of dynamic stress-strain relationship. And by means of the exponential function, the empirical equations of the relationship between secant shear modulus Gsec, shear modulus ratio Gsec/Gmax and cyclic strain ε were established based on series of test results. The results show that according to different combinations of static deviator stress and cyclic stress, two kinds of failure patterns with deviator stress reversal or no deviator stress reversal are observed in the samples tested in this series, including cyclic mobility and the failure of accumulation residual strain. In addition, the degradation of dynamic shear modulus is due to the development of vibration pore-water pressure and it is observed that the shear modulus reduces with the progressive number of cycles.

RECONSTRUCTION OF THE NATURAL ENVIRONMENT DURING THE LIFE SPAN OF NANJING HOMO ERECTUS

From the comparison of the corresponding strata to the skull of the relic Homo erectus which was found in the Calabash cave of Nanjing Tangshan and dated in 350,000 aBP with other cave strata, the region of Tangshan is a kind of periglacial environment before middle Pleistocene epoch. During the life span of Nanjing Homo erecturs , it had transformed to warm and humid sub-tropical climate from periglacial climate. The natural environment is similar to present except the individual high mountains.

Structural Health Monitoring and Prognostics Research Group of Nanjing University of Aeronautics and Astronautics

As an important part of the State Key Laboratory of Mechanics and Control of Mechanical Structures in Nanjing University of Aeronautics and Astronautics,the Structural Health Monitoring and Prognostics(SHM&P;)Research Group was the first and only team in China who initiated the SHM study for aerospace engineering in early 1990’s,and has held a leading position in this new and exciting field since then.Currently,SHM&P; Research Group is led by Dr.Yuan Shenfang,a Changjiang Chair Professor,the winner of both

Transactions of Nanjing University of Aeronautics & Astronautics Information for Contributors

Transactions of Nanjing University of Aeronautics&Astronautics;(TNUAA)is a bimonthly journal facing international academic community.Emphasizing prompt and effective dissemination of key data and new scientific insights,TNUAA offers publication of new experimental and theoretical papers bearing on applications to all branches of aeronautics,astronautics and civil aviation.