Papers by Keyword: Quantitative Analysis

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Authors: Xing Ju Wang, Xiao Ming Xi, Gui Feng Gao, Jin Jie Chen
Abstract: This study develops a blocked cost model of urban rail transit, which is applied to determine laying mode of urban rail transit. In addition, this model focuses on the laying mode choice of urban rail transit by using quantitative analysis, which is previously discussed by using qualitative analysis. The case of Line No. 1 of Shijiazhuang urban rail transit is given to demonstrate the blocked cost. The results show that the cost of urban rail transit on the ground is 0.372 billion RMB per km and the cost of urban rail transit underground is 1.79 billion RMB per km. The mode on the ground is the best solution due to its low cost. But by analyzing and evaluating generalized cost in which blocked cost has been considered, the mode of urban railway transit underground is the best choice due to 1.79 billion RMB per km compared to 1.91 billion RMB per km on the ground.
664
Authors: Yong Ping Pu, Ning Xu, Xiao Long Chen
Abstract: Quantitative analysis of tetragonal phase in barium titanate powders and fundament of standard curve was discussed from the result of X-ray diffraction (XRD) experiment via testing the standard series prepared powder samples. Some different conclusions compared with the past researches were drawn by analyzing the XRD data including the integrated intensity of a certain diffraction peak, difference in 2θ between peak (002) and (200) △2θ and d (interplanar spacing) value. Thus a useful method was provided for quantitative analysis tetragonal phase in barium titanate powders by synthesized by hydrothermal method.
1006
Authors: Jing Qing Lv, Pei Pei Liu, Yan Wei
Abstract: Applying composite index leading to an evaluation index system of urban-rural integration, using entropy method for secondary weighting, a model is constructed of quantitative analysis of the regional urban-rural integration. This paper has made a quantitative analysis of the development levels of regional urban-rural integration in the case of the Shandong Peninsula Blue Economic Zone. The research results show that in the problem of multi-target integrated evaluation, the application of composite index, constructing evaluation index system, enables the evaluation process to cover more assessment information without any increase in calculation steps. Application of the model presented in this paper makes feasible a quantitative analysis of the regional urban-rural development.
4748
Authors: Badis Haddag, Julien Thil, Mohammed Nouari, Claude Barlier
Abstract: This paper deals with the analysis of the cutting process in the BTA (Boring Trepanning Association) deep hole drilling. The process is a major technique of drilling when the machining with a conventional tool is not possible. Poor training and/or poor chips evacuation often cause a temperature rise and excessive wear detrimental to the tool life and the dimensional stability of machined parts. The process is relatively not explored enough, because it is difficult to instrument experimental tests (measurement of forces acting at each insert of the BTA drilling tool, temperature at each cutting edge…). Moreover, the thermomechanical phenomena related to the cut are localized at the end of the BTA drilling head and confined in a zone inaccessible to the observation. Hence, a study of this process based on a scientific approach has been proposed. The evaluation of the chips morphology has been performed. Indeed, it is a good indicator of the stability of the cutting process and it can therefore be a serious help in the selection of optimal cutting parameters. Adequate parameters are proposed to highlight the impact of cutting conditions on the cutting process. Macro and microscopic observations of generated chips under several cutting conditions are performed. Fragmentation and segmentation of chips are some examples of analysed phenomena. In this sense, experimental tests have been conducted. The chips have been sorted according to their morphology and identified according to their origin and then proposed physical parameters are assessed. The quantitative and qualitative analysis of chips allowed identifying the impact of the cutting speed and feed rate on the cutting process.
1992
Authors: Sang Hyun Lee, Han Seung Lee
Abstract: Life span of structures made with concrete was shortened by carbonation. This phenomenon makes pH in concrete lower. If pH value in concrete become below 10, rebar in concrete begin to be corroded. This pH value was effected by quantity of Ca(OH)2 that depends on cement types, hydration reaction and carbonation time. In this study, pH value and quantity of Ca(OH)2 in mortar which has blast furnace slag were tested according to hydration and carbonation time. As a test result, the more cement has blast furnace slag (BFS) and the longer carbonation time last, the lower pH value in mortar has. And using this quantitative analysis result of pH and Ca(OH)2, it may be used effectively when service life considering carbonation is predicted using FEMA.
625
Authors: Li Ye Sun, Li Xin Sun, Shu Min Tang, Hong Hai
Abstract: Considering the characteristics of vision in different luminance levels and the errors of the visual angle restituting, this research obtains a series of simulant scenes and the quantity relations between the luminance of actual scenes and reappearance scenes in the low luminance and weak contrast environment. Finally, carrying the subjective evaluation of these scenes, it obtains the scope of luminance and the quantification relations among these stimulus by statistical analysis. This paper provides theoretical basis for scene simulation and evaluation, and obtain quantitative suggestions for corresponding standards. It has important theory significance and the practical value for landscape lighting planning and design.
2371
Authors: John S.O. Evans
Abstract: Topas is a powerful and flexible software suite for the analysis of powder diffraction (and other) data. In this paper we describe methods to interact with the software in efficient and customisable ways. We also provide brief details of a wiki site for sharing ideas and methods for this software (topas.dur.ac.uk). Finally we give an overview of the potential advantages of parametric refinement methods within Topas and exemplify them with a quantitative analysis study of the phase transitions in WO3.
1
Authors: Li Ye Sun, Gang Liu, Hong Hai
Abstract: Considering the characteristics of vision in the low luminance and weak contrast environment, this research obtains a series of simulant scenes. By means of experiment observation, quantification analysis and subjective evaluation, this research proposes a kind of scientific and controllable methods and modes, then relates the quantitative index and the qualitative description in order to take physics and psychological factor into the comprehensive consideration in lighting environment. Finally, it obtains the scope of luminance stimulus and the quantification relations. The results of this research can provide theoretical basis, model and quantitative suggests for corresponding standards. It has significance to urban lighting planning, design and management.
3159
Authors: Di Jiang, Hua Zhou, Xing Ping Sun
Abstract: In object-oriented programming, designing class is one of the most important steps of software development. How to analyze and evaluate the class design is an important topic in the field of software engineering. The paper puts forward a method which is based on information entropy to quantify the coupling of class design. Compared to the conventional methods, this method has a better operability and accuracy. On the above basis, this paper validates the feasibility of the method by the case studies.
196
Authors: Dong Xu Zhang, Da Ping Liu, Ze Lun Cui, Meng Xiao
Abstract: In recent years the community has continued to raise awareness about the protection of historic buildings including Buddhist temples, but unfortunately the protection of the sound environment, which is an important part of the overall environment of historic buildings, is often ignored, and there is still a lack of research on the relationship between the sound environment and the traditional temples space in scholarly circles. Soundscape theory studies the sound environment from the perspective of sound, the environment and the listener, differing from traditional acoustics in considering peoples awareness and evaluation of sound in a special condition. Therefore, using soundscape theory as its major tool, it is considered to be future research direction that the impact of spatial elements in Han-Chinese Buddhist temples on the acoustic environment. By means of acoustic data to make a quantitative analysis of architectural history, it will in theory broaden the research domain of architectural history and lay a solid foundation for Chinese religious soundscape science, and in practice, will support the protection of the acoustic environment of historic buildings as intangible cultural heritage, and provide sound field parameters for the construction of a new temple.
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