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Search Results: 1 - 10 of 8289 matches for " Yiqing QIU "
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Cold-State Investigation on a Flame Holder  [PDF]
Yiqing Du
Journal of Power and Energy Engineering (JPEE) , 2013, DOI: 10.4236/jpee.2013.17008
Abstract:

Slitty bluff body is widely used as a high-performance flame holder in power industry. To understand the flame stability mechanism, the evolution of the near wake over a slitty bluff body in cold state was numerically investigated using the renormalization group (RNG) k-ε model at Reynolds number of 470,000. The coherent structure of the near wake was identified by the vortex shedding simulation. To explain the vortex shedding, a mechanism that single vortex of large size suddenly immerses two shear layers was proposed. To quantitatively compare the near wakes at different gap ratio, a vortex shedding character dimension was first proposed. This character dimension has positive correlation with flame stability. Particle-image velocimetry (PIV) measurements in a close wind tunnel were also carried out to confirm the observation from the numerical study. The evidence shows that the numerical results are of good agreement with the cold-state experiments.

Convenient Way of Extend Linear Expenditure System Modeling without Regression  [PDF]
Ningning Song, Yiqing Liu
Open Journal of Statistics (OJS) , 2015, DOI: 10.4236/ojs.2015.56055
Abstract:

Extend Linear Expenditure System model is a collection of multiple linear models, and modeling is a clearly tedious process. The innovation of this paper is trying to find a simple way of ELES modeling, which means, in order to omit the modeling process one by one, we try to use Excel functionality to create a model workplace. As long as you replace the original sample data in the workspace, you can get the results you want.

The New Driving Force of Shenzhen’s Economic Development in the New Era—From the Perspective of Total Factor Productivity  [PDF]
Yiqing Lv, Hui Peng
American Journal of Industrial and Business Management (AJIBM) , 2018, DOI: 10.4236/ajibm.2018.812159
Abstract: In New era, Shenzhen’s economic development needs new impetus. The paper analyzes the dynamic change mechanism, regional development potential and industrial structure upgrading efficiency of Shenzhen’s economic development from the perspective of total factor productivity. First of all, the paper analyzes and collates the mechanism of the production of total factor productivity and the way to improve it. Secondly, it calculates the total factor productivity of the whole, major region and industry in Shenzhen. The results show that the growth rate of total productivity in Shenzhen is strong, and the growth rate of total factor productivity in different regions and industries is uneven and differentiated, and the driving force of total factor productivity growth in different regions and industries is not the same. According to the conclusion, some constructive policies and suggestions are put forward. The government should grasp macroscopically to improve total factor productivity accurately and efficiently, use Multi pronged approach to deepen the reform of the economic system and making up the short board of Shenzhen’s economic development, build a modern industrial system and adhere to the general direction of industrial transformation and upgrading, and do deep tillage and meticulous work to formulate policies for service industries accurately, seize the commanding heights of human capital and optimize the structure of human capital.
Solidification Structure of Low Carbon Steel Strips with Different Phosphorus Contents Produced by Strip Casting
Na LI,Zhenyu LIU,Yiqing QIU,Zhaosen LIN,Xianghua LIU,Guodong WANG,
Na
,LI,Zhenyu,LIU,Yiqing,QIU,Zhaosen,LIN,Xianghua,LIU,Guodong,WANG

材料科学技术学报 , 2006,
Abstract: In the present paper, low carbon steel strips with different phosphorus contents were produced using a twin roll strip casting process. The solidification structure was studied and its features were analyzed in detail. It was found that the strips possessed a fine microstructure compared with the mould cast steels. With increasing phosphorus content more ferrite has been formed with finer grains.
Relationship between shade and herbivory in Asarum canadense (Wild Ginger)
Yiqing Liang
University of Toronto Journal of Undergraduate Life Sciences , 2009,
Abstract: Plant defense is costly and depends on a trade-off between growth, reproduction and the generation of mechanical and chemical defense mechanisms (trichomes, secondary compounds, respectively). Defense is especially costly in resource-limited environments, such as shade. Shade-tolerant plants are adapted to grow and reproduce under low light conditions. The purpose of this study is to determine whether individuals of shade-tolerant Asarum canadense (Wild Ginger) growing in different light regimes show differences in herbivore damage, indicative of differences in the amount of secondary defense chemicals. Populations of wild ginger were studied to assess the percentage of herbivory on leaves in relation to the percentage of canopy cover. A significant positive correlation between shade intensity and herbivory was found among individuals as well as across patches. Plants with access to more light are probably able to allocate more energy to the production of defense chemicals. The results show that although A. canadense is equipped to survive in high shade conditions, it becomes increasingly susceptible to herbivory as shade increases.
Stochastic differential equations driven by $G$-Brownian motion with reflecting boundary conditions
Yiqing Lin
Mathematics , 2011, DOI: 10.1214/EJP.v18-2566
Abstract: In this paper, we introduce the idea of stochastic integrals with respect to an increasing process in the $G$-framework and extend $G$-It\^o's formula. Moreover, we study the solvability of the scalar valued stochastic differential equations driven by $G$-Brownian motion with reflecting boundary conditions (RGSDEs).
A New Result for Second Order BSDEs with Quadratic Growth and its Applications
Yiqing Lin
Mathematics , 2013, DOI: 10.1080/17442508.2015.1044531
Abstract: In this paper, we study a class of second order backward stochastic differential equations (2BSDEs) with quadratic growth in coefficients. We first establish solvability for such 2BSDEs and then give their applications to robust utility maximization problems.
Extraneuronal Monoamine Transporter Mediates the Permissive Action of Cortisol in the Guinea Pig Trachea: Possible Involvement of Tracheal Chondrocytes
Chen Wang, Wenying Qiu, Yiqing Zheng, Hui Li, Yijia Li, Bing Feng, Shu Guo, Li Yan, Ji-Min Cao
PLOS ONE , 2013, DOI: 10.1371/journal.pone.0076193
Abstract: Cortisol, a member of glucocorticoids, could potentiate the action of catecholamine by a non-genomic mechanism. Although this permissive effect has been well appreciated in the anti-asthmatic medication, the underlying signaling pathway has remained mysterious. Here, we show that extraneuronal monoamine transporter (EMT), a membraneous reuptake transporter for circulating catecholamine clearance, is the direct target of cortisol in its permissive effect. We found that BSA-conjugated cortisol, which functions as a cortisol but cannot penetrate cell membrane, enhanced the spasmolytic effect of β-adrenoceptor agonist (isoprenaline) in histamine-sensitized tracheal spirals of guinea pigs, and pharmacological inhibition of EMT with famotidine was powerful enough to imitate the permissive action of cortisol. To our surprise, EMT protein expression was high in the chondrocytes of tracheal cartilage, but was undetectable in tracheal smooth muscle cells. The functionality of EMT was further confirmed with measurement of catecholamine uptake by tracheal chondrocytes. Moreover, cortisol-initiated membrane signaling could activate protein kinase C (PKC), which phosphorylates EMT and induces its internalization via a lipid raft-dependent pathway. Both of the mechanisms slow down the reuptake process by chondrocytes, leading to extracellular catecholamine accumulation and results in a more profound adrenergic signaling activation in tracheal smooth muscle cells. Thus, an EMT-centered pathway was proposed to explain the permissive action of cortisol. Collectively, our results highlight the role of EMT in the crosstalk between glucocorticoid and catecholamine. EMT may represent a promising target for adrenergic signaling modulation.
Analysis on Impact of Individual’s Bid Propensity on Optimal Bidding of “Naive-Rational” Bidders  [PDF]
Yiqing Tang, Weijie Yuan, Cuihong Luo
Modern Economy (ME) , 2017, DOI: 10.4236/me.2017.87067
Abstract: This paper considers the emotional factors of the naive and rational bidder in the auctions, and introduces it in the bidder’s utility function. We study the impact of individual’s bid propensity on optimal bidding in the different case of “naive-rational” bidders’ value judgments by establishing the naive and rational bidder’s comprehensive utility function including monetary utility and emotional utility. Further, we analyze who is the last winner in the condition of difference of individual’s bid propensity.
Calculation and Analysis of Synergy Potential of Exhibition Economy in the PRD Urban Agglomerations  [PDF]
Peng Li, Yiqing Lv, Dan Yao
Modern Economy (ME) , 2017, DOI: 10.4236/me.2017.812105
Abstract: This paper takes the PRD (Pearl River Delta) urban agglomeration as the research object and improves the gravity models to estimate and analyze synergetic development potential of exhibition economy in eight major PRD cities. Firstly, it makes a factual analysis of the overall development trends and characteristics of exhibition economy in China, and introduces the development status of exhibition economy in the PRD Economic Circle. Secondly, it constructs indicator systems for the development evaluation of exhibition economy and evaluates comprehensive development capacity of exhibition economy in the eight PRD cities. Thirdly, gravity models are improved to calculate the synergetic development potential of exhibition economy in the eight PRD cities. Research Results: The PRD Economic Circle consists of three parts, namely, Guang-Fo-Zhao Economic Circle, Shenzhen-Dongguan-Huizhou Economic Circle and Zhuhai-Zhongshan-Jiangmen Economic Circle. Wherein, Guang-Fo-Zhao Economic Circle is centered on Guangzhou while Shenzhen-Dongguan-Huizhou Economic Circle and Zhuhai-Zhongshan-Jiangmen Economic Circle are centered on Shenzhen. Research Proposals: The local government should establish administrative departments for the synergetic development of exhibition economy in the PRD urban agglomeration, rationalize the allocation of exhibition economic resources, optimize synergetic development structures of exhibition economy, explore characteristic images of cities and integrate them into the PRD Economic Circle; promote synergetic development of exhibition economy in the PRD urban agglomeration, thereby enhancing domestic and international competitiveness of the exhibition industry and driving robust growth of regional economy. Innovations of the paper are described below: it studies synergetic development of exhibition economy in the PRD urban agglomeration for the first time, explores the integration of exhibition economy in urban agglomerations of different levels, seeks solutions for the common development of exhibition economy in urban agglomerations and makes strategic planning for the development of exhibition economy in the PRD urban agglomeration. Currently, there are few researches on the synergetic development of exhibition economy in urban agglomerations of China.
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