نتایج جستجو برای: agglomeration effect

تعداد نتایج: 1646521  

The structure-conduct-performance (SCP) paradigm has constituted an enduring empirical tradition in empirical industrial economics and has the advantage of clarifying the basic building blocks of the competitive mechanisms. This paper presents a SCP model to estimate causes and effects in Iranian manufacturing industry in 2009. The model used in this paper is a system of four simultaneous equ...

Journal: :Applied sciences 2022

This study selected the Yangtze River Delta urban agglomeration as research area, combining it with current situation of transportation development to construct integration index system and evaluate status integration. The examined influence mechanism infrastructure on industrial agglomeration. results are follows: (1) From 2011–2020, agglomeration’s showed a clear upward trend. (2) level local...

Journal: :Chemical communications 2012
Jingdong Lin Xiaoqin Zhao Yunhe Cui Hongbin Zhang Daiwei Liao

The lifetime (200 h) of a Cu/SiO(2) catalyst under DMO-ethanol feedstock is 20 times longer than that (10 h) of the catalyst under DMO-methanol feedstock without any modification of the catalyst. The stabilization effect of ethanol on the active centers can effectively slow down the agglomeration of copper particles during the hydrogenation process.

2008
C. L. Dobbs

We investigate the formation of GMCs in spiral galaxies through both agglomeration of clouds in the spiral arms, and self gravity. The simulations presented include twofluid models, which contain both cold and warm gas, although there is no heating or cooling between them. We find agglomeration is predominant when both the warm and cold components of the ISM are effectively stable to gravitatio...

Journal: :Journal of colloid and interface science 2017
Thaddeus W Vasicek Samir V Jenkins Leticia Vaz Jingyi Chen Julie A Stenken

Gold nanoparticles with a graft density of 0.09, 0.30 and 0.40chains/nm2 of poly(N-isopropylacrylamide) were reproducibly synthesized by varying the ratio of disulfide terminated poly(N-isopropylacrylamide) to gold nanoparticle. The polymer coated nanoparticles were stable at room temperature in 50mM NaCl, yet agglomerated at 37°C. Previous studies have observed conflicting results as to the re...

2012
Yan Liu Xingfeng Wang Jianfeng Wu

This paper focuses on the role of city interaction in influencing local economic growth using county-level data in China. According to literature on urban and regional economics, the impacts of a high-tier city on its surrounding areas depend on the interaction of growth spillover effect and agglomeration shadow effect. The empirical evidence in this paper illustrates that higher-tier cities ha...

2013
James H Love Stephen Roper

There is now substantial evidence that locational and agglomeration influences can have a significant positive effect on innovation performance. Networking and boundary-spanning activities are also increasingly recognised as important contributors to innovation success. This paper attempts to discover whether these factors are linked: in particular, is there any link between plant location, agg...

2005
L. Jong

Dynamic mechanical properties including temperature effect, stress softening, and Payne effect are studied on the elastomer composites filled with soy protein or carbon black. The comparison of protein composite with well-known carbon black composites provides further insight into the protein composites. The elastomers filled with soy protein aggregates give substantial reinforcement effect whe...

2000
Guy Dumais Glenn Ellison Edward L. Glaeser

The degree of geographic concentration of individual manufacturing industries in the U.S. has declined only slightly in the last twenty years. At the same time, new plant births, plant expansions, contractions and closures have have shifted large quantities of employment across plants, firms, and locations. This paper uses data from the Census Bureau’s Longitudinal Research Database to examine ...

1995
Diego Puga Anthony J. Venables

This paper considers the locational effects of geographically discriminatory trade policy. A preferential move towards a free trade area pulls industry into the integrating countries. Input-output links between imperfectly competitive firms amplify this effect and, when trade barriers fall below some critical level, may lead to agglomeration with some member countries gaining industry at the ex...

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