http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
A Transportation Problem with Uncertain Costs and Random Supplies
Haiying GUO,Xiaosheng WANG,Shaoling ZHOU 국제이네비해양경제학회 2015 International Journal of e-Navigation and Maritime Vol.2 No.1
Transportation problem is an optimization problem. In general, it was studied under random or uncertain condition. Considering the recent complexity, it is not enough to make should be a perfect transportation plan only based on. Usually, there is not only uncertainty but also randomness in many systems. In this paper, the aim is to investigate a transportation problem under uncertain and random environment. As a result, a conceptual uncertain random model is proposed for the problem, where the supplies are considered as random variables, and the costs and the demands are uncertain variables. By minimizing the expected value of uncertain objective function and taking confidence levels on constraints, transforming the model into a crisp mathematical form is the main conclusion. By minimizing the expected value of uncertain objective function and taking confidence levels on constraints, the above model can be turned to a mathematical form. Then transforming the model into a typical mathematical programming model is the main conclusion by using uncertainty theory and probability theory. At the end, a numerical example is given to show the feasibility of the model.
Ruiheng Yue,Yingliang Liu,Shaoling Xia,Shengang Xu,Shaokui Cao 한국고분자학회 2022 Macromolecular Research Vol.30 No.7
The strengthening mechanism of graphene derivatives in the polymer composites is an interesting issue, which exhibits the excellent mechanical and tribological properties. In this case, the visual observation about the existing state of graphene nanosheets in the polymer composites is much more attractive to explain the intrinsic origin of graphene-strengthening mechanism. At present, the Raman imaging via nondestructive spectroscopic detection is an impactful tool to observe the carbonaceous materials in the graphene nanocomposites. Therefore, the Raman imaging will be applied in this work to detect the existing state of graphene oxide (GO) nanosheets in GO-hybrid polyurethane (PU)/epoxy (EP) interpenetrating polymer network (IPN) with an aim to make clear the GO-strengthening mechanism in GO-hybrid PU/EP IPN. The results obviously indicated the GO nanosheets are chemically bonded between polyurethane and epoxy, which is a key factor to mechanically strengthen GO-hybrid PU/EP IPN by transferring the polymeric stress to the GO nanosheets with high mechanical strength. Besides, the graphitization of GO nanosheets on the tribological surface of GO-hybrid PU/EP IPN is also evidently identified by Raman imaging, which provides a powerful evidence for the improvement of tribological performance in GOhybrid PU/EP IPN. This work provided the powerful visual Raman imaging proofs for the mechanically/tribologically-strengthening mechanism of GO-hybrid PU/EP IPN, including the appearance of mechanical/tribological quasi-steady state.
Kevin Ruddick,Quinten Vanhellemont,Jing Yan,Griet Neukermans,Guomei Wei,Shaoling Shang 한국해양과학기술원 2012 Ocean science journal Vol.47 No.3
This study assesses the performance of the Geostationary Ocean Imager (GOCI) for mapping of suspended particulate matter in the Bohai Sea, a turbid water region. GOCI imagery for remote sensing reflectance and Total Suspended Solids (TSS) is analysed in detail for two days in June 2011 (8 images per day). Both instantaneous and daily composite maps are considered and a comparison is made with corresponding reflectance and TSS products from MODIS-AQUA. Results show TSS distributions corresponding to previous studies of the region. The advantage of the higher acquisition frequency (8 images/day instead of 1) offered by GOCI is clearly demonstrated in the daily composite which is more complete during this period of scattered but moving clouds. Consideration of temporal variation over the day indicates low natural variability but some artificial variability from processing errors – this analysis provides a first indication of how the higher frequency of data from geostationary ocean colour could lead to improved data quality control via temporal coherency outlier detection. While there is room for improvement on the GOCI calibration, atmospheric correction and retrieval algorithms, the current study suggests that the GOCI data can already be used now to study qualitatively sediment dynamics except in the extremely turbid waters which are masked out of the current dataset. In a wider context, it is considered that the technical challenges of geostationary ocean colour have been met by the GOCI concept, and, notwithstanding potential improvements on the concept and data processing methods, it is recommended that this mission serve as a model for future geostationary ocean colour sensors over Europe/Africa and the Americas.
Shaole An,Kefa Zhou,Jinlin Wang,Nannan Zhang,Shibin Liao,Qianwen Feng,Zhixin Zhang 한국지질과학협의회 2020 Geosciences Journal Vol.24 No.3
A high resolution aeromagnetic survey of Kalatage area was carried out, aimed at providing detailed geological structures information and guiding for further mineral prospecting. The recently acquired data was processed and interpreted to better understand the mode of occurrence of the Cu-Au polymetallic deposits and associated structural features. Several analysis techniques, such as reduction to the pole, spectral analysis, low-pass filtering, were applied to process the aeromagnetic data to understand the distribution of magnetic sources. The depth of magnetic sources was estimated by spectral analysis, and the shallower and deeper sources anomalies were analyzed. The Euler deconvolution, total horizontal derivative, tilt angle derivative and thetamap were used to study lineament structures. The new structural scheme was established by comparison of above derivative results and geological data of the Kalatage area. The results show that the study area is affected by sets of NWW-SEE/NW-SE, NNE-SSW/NE-SW and nearly E-W directions faults structures; various probable magmatic rocks may be the results of the ascent and intrusion of magma along these regional fractures in the process of large-scale and deep tectonic-magmatic activities. The polymetallic ore deposits are mainly distributed within the eastern portion of the study area and are confined probably along structure lineament suggesting that it is structurally controlled. Furthermore, the favorable area for mineralization was proposed. These analyses help the recognition of structure features of differing magnetizations, interpretation of tectonic evolution, which could have important reference for further mineral prospecting.
The Shear Behavior of Double-superposed Panels Reinforced with Different Shear Connectors
Wenying Zhang,Lianping Yang,Shaole Yu,Junsheng Yan 대한토목학회 2018 KSCE JOURNAL OF CIVIL ENGINEERING Vol.22 No.10
The shear behavior of a new type of sandwich structure, double-superposed panels, is investigated by conducting push-out test and finite element analysis in this paper. Experiments have been carried out to characterize the effect on the shear behavior of two different shear connector configurations: truss connector and tic-tac-toe connector. Based on finite element analysis, a parameter study is conducted, with the major parameters considered being the diameter, height and pitch of shear connector. Test results indicate that the delamination between the precast layers and core layer is the main failure mode for all specimens, and the crack formation and crack development between the two interfaces is not in synch. It’s also revealed that the specimens with tic-tac-toe connections present higher ultimate shear strength, as well as better ductility during the process of failure, compared to those with truss connections. The results of the numerical simulations show that the ultimate shear strength and the ductility of both connector configurations increases as the diameter of the shear connector increases; increasement in height of shear connector has a negligible effect on the shear behavior; when the pitch length is increased, the ultimate shear strength of the truss connector specimen increases, which is the inverse behavior of the specimen with tic-tac-toe connector.