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Search Results: 1 - 10 of 66320 matches for " Pei Yu "
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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.
Do “Newly Oligopolistic Reaction” and Host Technology Resources Matter for MNC’s Location? —A Study in China’s Technology Industries  [PDF]
Jean-Louis Mucchielli, Pei Yu
Technology and Investment (TI) , 2011, DOI: 10.4236/ti.2011.23018
Abstract: This paper aims at studying the determinants of inward Foreign Direct Investment (FDI) varying with sectors, by considering particularly multinational corporation (MNC)’s location strategies and local technology resources in host industries. Using data from China’s National Bureau of Statistics and National Development and Reform Commission, we empirically analyze the main determinants of industrial inward FDI, across 20 manufacturing sectors (2-digit) in China, over the period 2001-2008, and we are particularly interested in 9 high-technology (HT) and medium-high-technology (MHT) industries. The random effect panel estimations reveal that when industrial technological intensity is controlled, host technology resources are significantly positive determinants for newly inward FDI. The dynamic econometrical approach by System Generalized Method of Moment (GMM) estimations for HT and MHT industries obtain interesting results, which show evident impacts on MNC’s strategic behaviors, brought about by geographic agglomeration (or industrial concentration) effects and local protection (that we will call “new oligopolistic reactions”). Besides, FDI in HT and MHT industries are both market and export seeking. High productivity, large economies of scale, and abundant technology resources attract newly FDI in these industries. This study has two contributions: firstly, it covers the deficiency that many researches on FDI in China only focus on aggregate flow without distinguishing host sector’s characteristics; secondly, it provide the local government some useful suggestions on regional development and industrial policies, especially in technology industries.
Identification of N-Methyl Bis(2-(Alkyloxy-Alkylphosphoryloxy)Ethyl) Amines by LC-HRMS/MS  [PDF]
Huilan Yu, Shilei Liu, Daoming Sun, Chengxin Pei, Yu Xiang
American Journal of Analytical Chemistry (AJAC) , 2014, DOI: 10.4236/ajac.2014.513091
Abstract: N-Methyl bis(2-(alkyloxy-alkylphosphoryloxy)ethyl)amines, which are abbreviated as PNPs, are a series of new skeleton chemicals belonging to schedule 2.B.04 chemicals of Chemical Weapons Convention (CWC). PNPs are important markers of chemical warfare agents because they are structurally relative to both nerve agents and N-mustards. In this study, fragmentation pathways of the most characteristic fragment ions in Q-TOF mass spectrometry were proposed based on the information from accurate mass and secondary fragmentations of product ions scan experiments. Results indicated that the base ion in LC/HRMS was the quasi-molecular ion [M+H]+. In LC-HRMS/MS, it was [M+H-CnH2n+1P(O)(OH)CmH2m+1O]+ fragment ion which was formed by losing an alkyloxy alkylphosphoryloxy group from the quasi-molecular ion. The diagnostic ion m/z84.0814 was identified as [C5H10N]+, which was the group of (CH2=CH)2N+(H)CH3. PNPs have two protonated centers. One is on the N atom, the other is on the O atom (P=O). O-n-propyl PNPs generally exhibited two fragmentation pathways. Firstly, the quasi-molecular ion [M+H]+ lost a propoxy alkylphosphoryloxy group to produce
ADLIF: a new large-displacement beam-based flexure joint
X. Pei ,J. Yu
Mechanical Sciences (MS) , 2011, DOI: 10.5194/ms-2-183-2011
Abstract: A flexure joint is an important component in flexure mechanisms. Most of well known flexure joints have always a trade-off among such performances as precision, stiffness, and stroke, which heavily affect the overall performances of flexure mechanisms. In this paper, a new flexure joint, named an anti-symmetric double leaf-type isosceles-trapezoidal flexure joint (ADLIF), is introduced. The joint is constructed by two leaf-type isosceles-trapezoidal flexure (LITF) building blocks in an anti-symmetrical form. In order to investigate such characteristics as precision, stiffness and stroke, two ADLIFs with different structural parameters are compared with a cartwheel hinge. In addition, a simple and accurate pseudo-rigid body (PRB) joint model of the ADLIF is formulated to simplify the parametric model and achieve the structural optimization. The results show that the ADLIF can gain a great improvement in precision as well as maintain other characteristics such as stiffness and ranges of motion similar. Even the ADLIF gets more than 16 times improvement in precision in the case that the rotational angle is less than five degrees (5°). The ADLIF can thus be used for the replacement of the cartwheel joint in some precision application fields.
On the Relationship between Equality and Efficiency
Pei-xing YU
Management Science and Engineering , 2009,
Abstract: The established theory of equality and efficiency implies that the two are in an unconditional negative correlation. According to this hypothesis and by setting up a simple model, the paper aims to prove the following propositions: Even if not considering the inequality of opportunity, only unequal results will have a double-edged effect on efficiency, either positive or negative. However, the final results attained from the positive and negative functions are not always favorable for efficiency. Only when stimulating effects surpass the undermining ones, can we raise efficiency through increasing inequality index or sacrificing certain equality. Therefore, under some circumstances, the tradeoff between equality and efficiency does not exist. Key words: equality; efficiency; inequality index; the relational curve between equality and efficiency
The spectral sequences and parametric normal forms
Majid Gazor,Pei Yu
Mathematics , 2011, DOI: 10.1016/j.jde.2011.09.043
Abstract: We generalize recent developments on normal forms and the spectral sequences method to make a foundation for parametric normal forms. We further introduce a new style and costyle to obtain unique parametric normal forms. The results are applied to systems of generalized Hopf singularity with multiple parameters. A different (new) version of this paper has been submitted for a possible publication in a refereed journal.
Bifurcation of ten small-amplitude limit cycles by perturbing a quadratic Hamiltonian system
Yun Tian,Pei Yu
Mathematics , 2013,
Abstract: This paper contains two parts. In the first part, we shall show that the result given in the Zoladek's example [1], which claims the existence of 11 small-amplitude limit cycles around a singular point in a particular cubic vector filed, is not correct. Mistakes made in the paper [1] leading to the erroneous conclusion have been identified. In fact, only 9 small-amplitude limit cycles can be obtained from this example after the mistakes are corrected, which agrees with the result obtained later by using the method of focus value computation [2]. In the second part, we present an example by perturbing a quadratic Hamiltonian system with cubic polynomials to obtain 10 small-amplitude limit cycles bifurcating from an elementary center, for which up to 5th-order Melnikov functions are used. This demonstrates a good example in applying higher-order Melnikov functions to study bifurcation of limit cycles.
Four limit cycles from perturbing quadratic integrable systems by quadratic polynomials
Pei Yu,Maoan Han
Mathematics , 2010,
Abstract: In this paper, we give a positive answer to the open question: Can there exist 4 limit cycles in quadratic near-integrable polynomial systems? It is shown that when a quadratic integrable system has two centers and is perturbed by quadratic polynomials, it can generate at least 4 limit cycles with (3,1) distribution. The method of Melnikov function is used.
In-Network Neighborhood-Based Node Similarity Measure: A Unified Parametric Model
Yu Yang,Jian Pei
Computer Science , 2015,
Abstract: In many applications, we need to measure similarity between nodes in a large network based on features of their neighborhoods. Although in-network node similarity based on proximity has been well investigated, surprisingly, measuring in-network node similarity based on neighborhoods remains a largely untouched problem in literature. One grand challenge is that in different applications we may need different measurements that manifest different meanings of similarity. In this paper, we investigate the problem in a principled and systematic manner. We develop a unified parametric model and a series of four instance measures. Those instance similarity measures not only address a spectrum of various meanings of similarity, but also present a series of tradeoffs between computational cost and strictness of matching between neighborhoods of nodes being compared. By extensive experiments and case studies, we demonstrate the effectiveness of the proposed model and its instances.
Sedimentary Environment of the Early Ordovician in Danzhai, Guizhou  [PDF]
Yu Pei, Youbin He, Jinxiong Luo, Yantao Zeng, Zhan Wen
Open Journal of Yangtze Oil and Gas (OJOGas) , 2017, DOI: 10.4236/ojogas.2017.23009
Abstract: This study analyzes the variations in trace element contents and ratios, the distribution patterns of rare earth elements, and the sedimentary environment and its evolution in the Early Ordovician. In particular, the analysis is based on measured section of the Qingjiang Village located in Nangao Town, Danzhai County, Guizhou Province. The analysis also considers thin sections and the characteristics of C, O isotopes. The lower part of the Tongzi Formation has a simple lithology and mainly consists of light gray to gray thin-medium bedded muddy dolomite and dolomicrite with a few dolarenites and dolorudites. The upper part of this formation includes gray thin-medium bedded fine crystalline dolomite and gray massive bioclastic limestone. Only a fraction of gray massive fine crystalline limestone, sparry calcarenite, and calcirudite are on top of the upper part. The Honghuayuan Formation is generally composed of light gray to gray medium-thick bedded or massive bioclastic limestone, reef limestone, and calcarenite with a few sandstones at the bottom. The δ18OPDB values of 18 samples are less than -11‰; in addition, the Pr/Pr* and Ce/Ce* ratios are greater and less than 1, respectively. These data reflect a sedimentary environment. The lower part of the Tongzi Formation might have been formed in an evaporite platform, which was then transformed into a restricted one, which featured a dry climate, a shallow water depth, and an insufficient amount of oxygen. By contrast, the upper part of the formation was deposited in an open platform, which featured a humid climate and relatively increased water depth and reducibility. During the sedimentary period of the Honghuayuan Formation, the water energy further increased, the climate became humid, the water depth increased, and the reducibility increased. Correspondingly, the sedimentary environment, which originally comprised littoral facies that slowly developed into an open platform and into a platform marginal bank, gradually evolved into a platform marginal reef.
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