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Search Results: 1 - 10 of 66347 matches for " GE Yu "
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Research on Modularization and Sustainable Design of Temporary Housing  [PDF]
Hui Yu, Ge Bai
Art and Design Review (ADR) , 2018, DOI: 10.4236/adr.2018.63012
Abstract: Temporary housing is temporary houses relative to permanent fixed housing. Due to temporary and inefficient factors of temporary housing, people pay less attention to it. Temporary housing has many problems such as single space mode, chaotic function, low comfort, poor ecological efficiency and so on. This research is faced with the growth of human society, the emergency response of natural disasters, the sustainability of production and construction, and the comfort of temporary residence. The design realized the requirements of factory production, folding loading and unloading, clear functional space about temporary housing through modular design, meets higher comfort requirements of housing. At last, strategic reserve and repeated use enhance the ecological sustainability of products.
Research on Technology Spillover’s Bridge Effect between Bidirectional FDI and GVC Position—A Case of Chinese Manufacturing Industry  [PDF]
Pei Yu, Ge Peng
American Journal of Industrial and Business Management (AJIBM) , 2019, DOI: 10.4236/ajibm.2019.94057
Focusing on technology spillover’s bridge effect between bidirectional Foreign Direct Investment (FDI) and Global Value Chain (GVC) position of manufacturing industry, this paper first analyzes theoretical mechanism of bidirectional FDI’s influence on GVC position, by taking into account technology spillover perspective, and then it verifies the theoretical framework by using 15 Chinese manufacturing sub-industries data in the latest ten years. The Generalized Least Squares regression results prove that technology spillover plays as a core channel of both Inward FDI’s and Outward FDI’s GVC position promotion effect, and the interactive development of bidirectional FDI can further significantly enhance this bridge effect.
Application of Perception Theory in Hotel Interior Design  [PDF]
Hui Yu, Ge Bai, Liang Wu
Open Journal of Applied Sciences (OJAppS) , 2018, DOI: 10.4236/ojapps.2018.87021
Abstract: The purpose of this article is to explore the application of perception theory in hotel interior design. Through the analysis of the theory of perception, the article sums up its connection with the interior design of Modern Hotel, and sums up the hotel interior design method under the influence of three factors of visual perception, space-time perception, logical perception so as to improve the level of humanization. Finally it will provide a basis for hotel interior design in the future.
Cone-Beam Composite-Circling Scan and Exact Image Reconstruction for a Quasi-Short Object
Hengyong Yu,Ge Wang
International Journal of Biomedical Imaging , 2007, DOI: 10.1155/2007/87319
Abstract: Here we propose a cone-beam composite-circling mode to solve the quasi-short object problem, which is to reconstruct a short portion of a long object from longitudinally truncated cone-beam data involving the short object. In contrast to the saddle curve cone-beam scanning, the proposed scanning mode requires that the X-ray focal spot undergoes a circular motion in a plane facing the short object, while the X-ray source is rotated in the gantry main plane. Because of the symmetry of the proposed mechanical rotations and the compatibility with the physiological conditions, this new mode has significant advantages over the saddle curve from perspectives of both engineering implementation and clinical applications. As a feasibility study, a backprojection filtration (BPF) algorithm is developed to reconstruct images from data collected along a composite-circling trajectory. The initial simulation results demonstrate the correctness of the proposed exact reconstruction method and the merits of the proposed mode.
SART-Type Image Reconstruction from a Limited Number of Projections with the Sparsity Constraint
Hengyong Yu,Ge Wang
International Journal of Biomedical Imaging , 2010, DOI: 10.1155/2010/934847
Abstract: Based on the recent mathematical findings on solving the linear inverse problems with sparsity constraints by Daubechiesx et al., here we adapt a simultaneous algebraic reconstruction technique (SART) for image reconstruction from a limited number of projections subject to a sparsity constraint in terms of an invertible compression transform. The algorithm is implemented with an exemplary Haar wavelet transform and tested with a modified Shepp-Logan phantom. Our preliminary results demonstrate that the sparsity constraint helps effectively improve the quality of reconstructed images and reduce the number of necessary projections. 1. Introduction Worldwide there are growing concerns on radiation induced genetic, cancerous, and other diseases [1–3]. Computed tomography (CT) is considered as a radiation-intensive procedure, yet it becomes more and more common. In the mid-1990s, CT scans only accounted for 4% of the total X-ray procedures but they contributed 40% of the collective dose [4]. The introduction of helical, multislice, and cone-beam technologies has increased and continues the increasing usage of CT [5, 6]. In US, the number of CT examinations has been estimated as high as nearly 60 million in 2002, which account for 15% of imaging procedures and 75% of the radiation exposure [4]. In June 2007, the New York Times reported that “the per-capita dose of ionizing radiation from clinical imaging exams in the U.S. increased almost 600% from 1980 to 2006.” More recently, in a high-profile article on the rapid growth in CT use and its associated radiation risks [3], Brenner and Hall estimated that “on the basis of such risk estimates and data on CT use from 1991 through 1996, it was estimated that about 0.4% of all cancers in the United States may be attributable to the radiation from CT studies. By adjusting this estimate for current CT use, this estimate might now be in the range of 1.5 to 2.0%.” Facing the increasing radiation risk, the well-known As Low As Reasonably Achievable (ALARA) principle is widely accepted in the medical community. One of the practical strategies is to reduce the number of necessary projection. Very interestingly, an elegant theory of compressive sampling or compressive sensing (CS) has recently emerged which shows that high-quality signals and images can be reconstructed from far fewer measurements than what is usually considered necessary according to the Nyquist sampling theorem [7, 8]. The main idea of CS is that most signals are sparse in an appropriate orthonormal system; that is, a majority of their coefficients are
A General Formula for Fan-Beam Lambda Tomography
Hengyong Yu,Ge Wang
International Journal of Biomedical Imaging , 2006, DOI: 10.1155/ijbi/2006/10427
Abstract: Lambda tomography (LT) is to reconstruct a gradient-like image of an object only from local projection data. It is potentially an important technology for medical X-ray computed tomography (CT) at a reduced radiation dose. In this paper, we prove the first general formula for exact and efficient fan-beam LT from data collected along any smooth curve based on even and odd data extensions. As a result, an LT image can be reconstructed without involving any data extension. This implies that structures outside a scanning trajectory do not affect the exact reconstruction of points inside the trajectory even if the data may be measured through the outside features. The algorithm is simulated in a collinear coordinate system. The results support our theoretical analysis.
Numerical simulations of nutrient transport changes in Honghu Lake Basin, Jianghan Plain
Feng Gui,Ge Yu
Chinese Science Bulletin , 2008, DOI: 10.1007/s11434-008-0315-4
Abstract: Nutrients transported from catchments are one of the most important sources for lake eutrophication. In this study, the Honghu Lake Basin, located at the middle reaches of the Yangtze River, was chosen as the study area, and the watershed hydrological distribution model SWAT (Soil Water Assessment Tool) was applied to evaluate the trajectory of watershed nutrient transportation over time. Based on the analysis of driving factors, three experiments corresponding to natural, traditional and modern agriculture processes respectively were designed to evaluate the changes of nutrient inputs from catchments under the three environments. The simulation results showed that there were variations in nutrient production and changes in the range and rate. For three periods of the experiments, TN concentrations have changed as 0.12→0.31→1.15 mg/L, and production as 420→1650→6522 T/a; while TP concentrations changed as 0.018→0.057→0.117 mg/L, and production as 78→303→665 T/a. The nutrient transportation experienced slowly long-term increases during 1840–1950, then showed a relatively rapid increase during the period of 1950–1980s and the period from 1980 to early 1990s, with increasing rate of 1.4% and 2.4% respectively. And from the later 1990s to now, an obviously increasing trend with 15% increasing rate occurred. The effect from human activities on the watershed nutrient transportation increased rapidly, and had become a dominant factor in changes of the nutrient transportation.
Reconstruction of the past 1000-a temperature in Canada based on pollen data
Ge Yu,Xiankun Ke
Chinese Science Bulletin , 2002, DOI: 10.1360/02tb9324
Abstract: Reconstructions of past climate based on pollen data have formed a robust approach and produced a great of products in time scales from a millennium to ten millenniums. However, it is an attempt for reconstruction of the past decade-century climate in the Global Change field. This note reports a reconstruction of the past 1000-a temperature in a 50-a scale in Canada based on pollen data. Because there were little human activities during the last 1000 years in North America, the climate in the period mainly responded to natural changes. The reconstruction of a natural-forcing change in the climate can provide a basis to recognize the climate changes impacted from human activities in China. The technique of modern analogue can be implemented to reconstruct the past millennium climate in China.
Singular right focal boundary value problem with given maximal values
Yu Tian,Weigao Ge
Tamkang Journal of Mathematics , 2006, DOI: 10.5556/j.tkjm.37.2006.317-332
Abstract: In this paper, we prove existence results for the singular problem $ (-1)^{n-p}(Phi_m x^{(n-1)})' $ $ (t)=mu f(t, x(t), ldots, x^{(n-1)}(t)), $ for $ 0<1$, $x^{(i)}(0)=0 $, $ i=0, 1, ldots, p-1 $, $ x^{(i)}(1)=0$, $i=p $, $ p+1, ldots, n-1 $, $ max{x(t):tin [0, 1]}=A $. The paper presents conditions which guarantee that for any $ A>0 $ there exists $ mu_A>0 $ such that the above problem with $ mu=mu_{A} $ has a solution $ xin C^{n-1}([0, 1]) $ with $ Phi_m(x^{(n-1)})in AC([0, 1]) $ which is positive on $ (0, 1) $. Here the positive Carath'edory function $ f $ may be singular at the zero value of all its phase variables. Proofs are based on the Leray-Schauder degree and Vitali's convergence theorem.
Multiple positive solutions for periodic boundary value problem via variational methods
Yu Tian,Weigao Ge
Tamkang Journal of Mathematics , 2008, DOI: 10.5556/j.tkjm.39.2008.111-120
Abstract: In this paper, we investigate the positive solutions of periodic boundary value problem. By using critical point theory the existence of multiple positive solutions is obtained.
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