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Search Results: 1 - 10 of 17214 matches for " HaiRong Fu "
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Institutional Distance, Investment Motivation and OFDI Location—Taking the Countries along the “Belt and Road” as an Example  [PDF]
Hairong Zhang
Open Journal of Social Sciences (JSS) , 2019, DOI: 10.4236/jss.2019.72009
Abstract: This paper selects 2008-2017 years of relevant investment data and uses the expanded gravity model to conduct an empirical analysis to explore the moderating effect of China’s investment motivation and institutional distance on the countries with different levels of development along the “Belt and Road”. The main innovation of this paper is to classify the countries in different economic development stages along the “Belt and Road” countries. On the basis of investment motives, this paper discusses how institutional distance is used as a regulatory variable to affect the investment of different motives. The results show that small distance between the host country and China’s normative system promotes the expansion of China’s investment scale. The distance between regulatory regimes has a reverse regulatory effect on investment driven by market size. For the middle and high income countries, the negative impact of regulatory distance on labor force and technology factor-seeking investment is particularly significant, while for low-income countries, regulatory distance has a very significant positive regulatory effect on natural resource-seeking investment. Finally, this paper provides targeted recommendations based on the conclusions to help investors reduce risk. Investors should make good use of the effect of institutional distance according to their own motives in order to reduce investment costs and risks. Relevant departments need to further improve the domestic regulatory environment and promote the development of OFDI in the future.
Mineral deformation and subglacial processes on ice-bedrock interface of Hailuogou Glacier
GengNian Liu,YiXin Chen,Yue Zhang,HaiRong Fu
Chinese Science Bulletin , 2009, DOI: 10.1007/s11434-009-0289-x
Abstract: Hailuogou Glacier is located in a warm and humid maritime environment. It is large and moves very fast. The bottom of the glacier slides intensively and the temperature at the bottom approaches the pressure melting point. Therefore, there are abundant melting water and debris which act as effective “grinding tools” for glacial abrasion. Polarizing microscope is used to observe the mineral deformation characteristics on the ice-bedrock interface. It is found that feldspar, quartz, hornblende and biotite are exposed to deformation, fracture and chemical alteration to various extents. Bending deformation is common for biotite, due to their lattice characteristics, and the bending orientations are mostly the same as the glacier flow. Bending deformation also occurs in a few hornblendes. High-angle tension fracture and low-angle shear fracture are common for quartz and feldspar, some of them are totally crushed (mylonizations) due to their rigidity. Thus, all the abrasion, quarrying, subglacial water action and subglacial dissolution processes at the bottom of the glacier are verified at the micro-scale level. Mineral deformation and fracture are the basic subglacial erosion mechanisms. The abrasion thickness is 30–90 μm for each time and the average is 50 μm. Most of the debris are silt produced by glacial abrasion. The extent of mineral deformation and fracture decreases drastically downwards beneath the bedrock surface. The estimated erosion rate is about 2.2–11.4 mm/a, which is similar to that of other maritime alpine glaciers, smaller than that of large-scale piedmont glaciers in Alaska (10–30 mm/a), and larger than that of continental glaciers (0.1–1.0 mm/a). The type and size of a glacier are the main factors that influence its erosion rate.
Photoresponse and carrier transport of protocrystalline silicon multilayer films
Wei Yu,HaiRong Zhu,Yi Zhao,YuKai Sun,HaiJiang Lu,GuangSheng Fu
Chinese Science Bulletin , 2012, DOI: 10.1007/s11434-012-5190-3
Abstract: Alternating multilayer films of hydrogen diluted hydrogenated protocrystalline silicon (pc-Si:H) were prepared using a plasma- enhanced chemical vapor deposition technique. The microstructure of the deposited films and photoresponse characteristics of their Schottky diode structures were investigated by Raman scattering spectroscopy, Fourier transform infrared spectroscopy and photocurrent spectra. Microstructure and optical absorption analyses suggest that the prepared films were pc-Si:H multilayer films with a two-phase structure of silicon nanocrystals (NCs) and its amorphous counterpart and the band gap of the films showed a decreasing trend with increasing crystalline fraction. Photocurrent measurement revealed that silicon NCs facilitate the spatial separation of photo-generated carriers, effectively reduce the non-radiative recombination rate, and induce a photoresponse peak value shift towards the short-wavelength side with increasing crystallinity. However, the carrier traps near the surface defects of silicon NCs and their spatial carrier confinement result in a significant reduction of the diode photoresponse in the long-wavelength region. An enhancement of the photoresponse from 350 to 1000 nm was observed when applying an increased bias voltage in the diode, showing a favorable carrier transport and an effective collection of photo-generated carriers was achieved. Both the spatial separation of the restricted electron-hole pairs in silicon NCs and the de-trapping of the carriers at their interface defects are responsible for the red-shift in photoresponse spectra and enhancement of external quantum efficiency. The results provide fundamental data for the carrier transport control of high-efficiency pc-Si:H solar cells.
Existence of Unbounded Solutions for a Third-Order Boundary Value Problem on Infinite Intervals
Hairong Lian,Junfang Zhao
Discrete Dynamics in Nature and Society , 2012, DOI: 10.1155/2012/357697
Abstract: We generalize the unbounded upper and lower solution method to a third-order ordinary differential equation on the half line subject to the Sturm-Liouville boundary conditions. By using such techniques and the Schäuder fixed point theorem, some criteria are presented for the existence of solutions and positive ones to the problem discussed.
A Reconfigurable FPGA System for Parallel Independent Component Analysis
Hongtao Du,Hairong Qi
EURASIP Journal on Embedded Systems , 2006, DOI: 10.1155/es/2006/23025
Abstract: A run-time reconfigurable field programmable gate array (FPGA) system is presented for the implementation of the parallel independent component analysis (ICA) algorithm. In this work, we investigate design challenges caused by the capacity constraints of single FPGA. Using the reconfigurability of FPGA, we show how to manipulate the FPGA-based system and execute processes for the parallel ICA (pICA) algorithm. During the implementation procedure, pICA is first partitioned into three temporally independent function blocks, each of which is synthesized by using several ICA-related reconfigurable components (RCs) that are developed for reuse and retargeting purposes. All blocks are then integrated into a design and development environment for performing tasks such as FPGA optimization, placement, and routing. With partitioning and reconfiguration, the proposed reconfigurable FPGA system overcomes the capacity constraints for the pICA implementation on embedded systems. We demonstrate the effectiveness of this implementation on real images with large throughput for dimensionality reduction in hyperspectral image (HSI) analysis.
Feature-Based Image Comparison for Semantic Neighbor Selection in Resource-Constrained Visual Sensor Networks
Bai Yang,Qi Hairong
EURASIP Journal on Image and Video Processing , 2010,
Abstract: Visual Sensor Networks (VSNs), formed by large number of low-cost, small-size visual sensor nodes, represent a new trend in surveillance and monitoring practices. Sensor collaboration is essential to VSNs and normally performed among sensors having similar measurements. The directional sensing characteristics of imagers and the presence of visual occlusion present unique challenges to neighborhood formation, as geographically-close neighbors might not monitor similar scenes. In this paper, we propose the concept of forming semantic neighbors, where collaboration is only performed among geographically-close nodes that capture similar images, thus requiring image comparison as a necessary step. To avoid large amount of data transfer, we propose feature-based image comparison as features provide more compact representation of the image. The paper studies several representative feature detectors and descriptors, in order to identify a suitable feature-based image comparison system for the resource-constrained VSN. We consider two sets of metrics from both the resource consumption and accuracy perspectives to evaluate various combinations of feature detectors and descriptors. Based on experimental results obtained from the Oxford dataset and the MSP dataset, we conclude that the combination of Harris detector and moment invariants presents the best balance between resource consumption and accuracy for semantic neighbor formation in VSNs.
Feature-Based Image Comparison for Semantic Neighbor Selection in Resource-Constrained Visual Sensor Networks
Yang Bai,Hairong Qi
EURASIP Journal on Image and Video Processing , 2010, DOI: 10.1155/2010/469563
Abstract:
A Reconfigurable FPGA System for Parallel Independent Component Analysis
Du Hongtao,Qi Hairong
EURASIP Journal on Embedded Systems , 2006,
Abstract: A run-time reconfigurable field programmable gate array (FPGA) system is presented for the implementation of the parallel independent component analysis (ICA) algorithm. In this work, we investigate design challenges caused by the capacity constraints of single FPGA. Using the reconfigurability of FPGA, we show how to manipulate the FPGA-based system and execute processes for the parallel ICA (pICA) algorithm. During the implementation procedure, pICA is first partitioned into three temporally independent function blocks, each of which is synthesized by using several ICA-related reconfigurable components (RCs) that are developed for reuse and retargeting purposes. All blocks are then integrated into a design and development environment for performing tasks such as FPGA optimization, placement, and routing. With partitioning and reconfiguration, the proposed reconfigurable FPGA system overcomes the capacity constraints for the pICA implementation on embedded systems. We demonstrate the effectiveness of this implementation on real images with large throughput for dimensionality reduction in hyperspectral image (HSI) analysis.
Global Uniqueness of Transonic Shocks in Divergent Nozzles for Steady Potential Flows
Li Liu,Hairong Yuan
Mathematics , 2009,
Abstract: We show that for steady compressible potential flow in a class of straight divergent nozzles with arbitrary cross-section, if the flow is supersonic and spherically symmetric at the entry, and the given pressure (velocity) is appropriately large (small) and also spherically symmetric at the exit, then there exists uniquely one transonic shock in the nozzle. In addition, the shock-front and the supersonic flow ahead of it, as well as the subsonic flow behind of it, are all spherically symmetric. This is a global uniqueness result of free boundary problems of elliptic--hyperbolic mixed type equations. The proof depends on the maximum principles and judicious choices of comparison functions.
Transonic Potential Flows in A Convergent--Divergent Approximate Nozzle
Hairong Yuan,Yue He
Mathematics , 2008,
Abstract: In this paper we prove existence, uniqueness and regularity of certain perturbed (subsonic--supersonic) transonic potential flows in a two-dimensional Riemannian manifold with "convergent-divergent" metric, which is an approximate model of the de Laval nozzle in aerodynamics. The result indicates that transonic flows obtained by quasi-one-dimensional flow model in fluid dynamics are stable with respect to the perturbation of the velocity potential function at the entry (i.e., tangential velocity along the entry) of the nozzle. The proof is based upon linear theory of elliptic-hyperbolic mixed type equations in physical space and a nonlinear iteration method.
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