Applied Mechanics and Materials Vol. 421

Abstract: For the asymmetry of real time flight information among civil aviation departments and between civil aviation and popular users, the users satisfaction reduced. A research on storage of 3D flight track was proposed combining KML and SQL Server. Firstly, SQL server is applied for storage of existing real time flight data and authorized users information. Then, the KML file is written to present dynamic 3D track. Finally, a website was deployed for authorized user to download the flight data. The research was realized and indicated that it increases data sharing between civil aviation sections and users, and decreases the risk of data leakage.

Abstract: In every country exists a time and frequency laboratory that operates a certain set of atomic clocks with goal to provide national approximation of UTC time scale. Generally, higher number of these interconnected clocks (Caesium primary standards and Hydrogen masers) might improve accuracy and stability of the time scale. The term interconnection in this context means that we have to transfer time between them despite of their location at geographically distant places the common method is a dedicated two-way satellite link or a GPS based system, however utilization of fibre links constantly increases. And present all-optical networks allow stable transmission of information. However to increase stability specific measures are necessary. Contribution summarizes the reasons for building of infrastructure dedicated to transfer of accurate time and frequency in the Czech Republic. It shows achieved results and indicated necessary steps for further stability improvements.

Abstract: English, which is specially used in the field of manufacturing systems, belongs to ESP (English for specific purposes). In order to improve the effect of ESP education in China, it is very necessary to create an English-Chinese parallel corpus for aiding ESP teaching and learning. In this paper, a novel method is presented to create a small-scale English-Chinese parallel corpus by means of TMS (translation memory system). Firstly, the suitable English and Chinese texts are collected from network, publication and human translation; secondly, The English and Chinese texts are aligned and formatted by using the related TMS functions; then Chinese texts are split into words by using ICWSS (Intelligent Chinese Word Segmentation System); finally, the English-Chinese corpus is stored in cloud database. This small-scale English-Chinese parallel corpus can be searched through ParaConc and meet the basic needs of ESP teaching and learning. Since the method does not need to design new algorithm nor develop new software system, the construction of the corpus is much easier and more flexible compared to general large-scale corpus.

Abstract: A new method is proposed to design composite waveform for MIMO radar based on phase coding and linear FM. Compared with the traditional MIMO phase coding signal, the new method has some merits such as the wide bandwidth and being realized in practice. The optimizational cost function is formulated, and simulation experiments verify the correctness of theory analysis and validity of optimizational method.

Abstract: With the developing of HSE (Health, Safety, and Environment) business in China National Petroleum Corporation (CNPC), the HSE system built in 2009 has not meet the management and integration demands escalated recently. The bottleneck lies in the architecture adopting a business-oriented way that resource management has to be coupled with application management, which makes business upgrading difficult. This paper proposed a design of resource-oriented architecture to tackle the issues confronted. The proposed architecture design views resource management as an independent task instead of coupling with application development and management, and will make it easier to achieve scalable resource utilization and application management.

Abstract: In this paper, a three-dimensional model of a steel sculpture was analyzed by using the finite element software ANSYS. The structural static response were achieved respectively under gravity load, ice load and wind load based on wind tunnel tests with the dynamic response under earthquake action. Besides, the structural parameters such as strength and stiffness under different conditions were also got. It is hoped that the analysis of ultrahigh steel sculpture will offer some technical support for practical engineering.

Abstract: Nowadays, the hollow floor is widely used due to its excellent mechanical property and economic benefit.However, its related specification is absence of evaluation in geometric parameters. The optimized analysis aimed at the hollow floor under vertical load, the total cost of the hollow floor is considered as a objective function, the maximum deflection and the threshold value of the geometric parameters are considered as constrain conditions. The program, which introduces the section design and compiled by the python script, based on the niche genetic algorithms is used to analyze the optimization of a hollow floor. Comparing to the global optimal solution, the program achieves good results. It indicates that the niche genetic algorithms is efficient and suited for the optimization analysis of hollow floor. The above mentioned conclusions will be conducive to engineering design and further research in this field.

Abstract: In urban downtown, densely cluster building either as a large number of middle, low and high-rise, may experience various types of damage occurring around the buildings because of wind. Newly constructed apartment complexes fall to the risk of strong winds at the corners of apartment buildings or gusts on the pedestrian passages. Research is on pedestrians safety in connection to wind flow inside and outside apartment complexes constructed in downtown areas. This study selected 3 types of apartment complexes and compared the wind velocity ratio among different spots in the complexes through wind tunnel experiment and CFD analysis. Furthermore, we changed the deployment and outward form of apartment complexes through CFD analysis and examined the wind-velocity ratio reduction effect. According to the results of wind tunnel experiment, wind velocity between two buildings decreased usually, but wind velocity increased in the space between the sides of two buildings and the space between front and back apartment buildings. Again, when comparing the results of wind tunnel experiment with the results of CFD analysis, they showed similar tendencies except for wake areas. Etc.

Abstract: The strength performance of a blind bolt connection has been investigated under monotonic and cyclic loadings. However, the performance of these connections under fatigue loading remains unknown and is currently being studied. This paper examines and provides a better understanding of the fatigue performance of a blind bolt in a concrete-filled hollow section. A number of tests are conducted to determine the fatigue life of the blind connection in the concrete-filled tube. Comparison is made with the fatigue performance of a standard bolt. Analysis of the result indicates that the extended hollobolt has longer life than the hollobolt and lower fatigue life than those of the standard bolt.

Abstract: Modern tall buildings using high strength and lighter construction materials are more flexible so could be excessive wind-induced vibrations resulting in occupant discomfort and structural unsafety. Recently, many studies have been advanced in using actuator force as an active control force based on the linear quadratic optimum control theory .It needs to predict the wind-induced response and the optimum control force to reduce the excessive wind-induced vibration. It takes a lot of time and cost to do wind tunnel test needed it, so numerical simulation approach instead of that is recommended sometimes. Simulating wind load in the time domain using known spectra data of fluctuating wind load is particularly useful for some prediction of windinduced vibration which is more or less narrow banded process such as a along-wind response of a tall building. In this study, fluctuating along-wind load acting on a tall building treated as a stationary Gaussian white noise process was simulated numerically in the time domain using the along-wind load spectra proposed by G.Solari in1992. And using this simulated along-wind load estimated the reduced along-wind vibration response of a tall building which has an active tuned mass damper (ATMD) installed based on the linear quadratic regulator (LQR) control method.