Publish in OALib Journal

ISSN: 2333-9721

APC: Only $99


Any time

2019 ( 5 )

2018 ( 53 )

2017 ( 70 )

2016 ( 53 )

Custom range...

Search Results: 1 - 10 of 4181 matches for " Changhong Miao "
All listed articles are free for downloading (OA Articles)
Page 1 /4181
Display every page Item
Global-local Nexus and Technological Learning in Industrial Cluster: A Case Study of Hair-goods Industry in Xuchang, Henan Province
全球-地方联结与产业集群的技术学习 ——以河南许昌发制品产业为例

MIAO Changhong,

地理学报 , 2006,
Abstract: Industrial clusters have become one of the most popular concepts in local and regional development research and practice not only in the more advanced countries but also in less-developed parts of the world. Since 1978, the great institutional transitions from the planned economy to the market economy and the speeding industrialization have inspired local clusters mushrooming in China. In this paper, drawing upon a global-local nexus perspective and deriving insights from the new regionalists on industrial districts, the regulationists on regulation approach and literature on Global Production Networks (GPN), the author tries to develop a broad conceptual framework, which focuses on the strategic coupling among social systems of production, institutes and regulation mechanisms, local production networks and global production networks, for understanding local cluster and learning industrial district. Using this framework, this paper presents a case study of the Xuchang hair-goods industry, an export-oriented local cluster in the middle Henan province of China, and explores the processes to make global-local nexus and their impacts on promoting restructuring and upgrading of traditional local clusters in China. The case study shows that the technological learning and industrial upgrading in those local clusters within the low road are likely to achieve, and the processes to approach the high road and learning industrial district depend on some critical dynamic factors such as the national institutional change and the active responses of local authorities and entrepreneurs, the relational networks embedded in local institutions and culture, and the extending of global production networks and the dynamic upgrading of global-local nexus. Therefore, developing learning industrial district should be an important strategy and policy to promote China's economic development and technological innovation.

Miao Changhong,

地理学报 , 1998,
Abstract: The rural industry has become increasingly important in regional economic development of China. However, there is a great geographic diversity in the performance and the development patterns of this sector. According to the theory of interaction of system and its environment, the patterns of rural industrial development could be classified by the dominant exogenous conditions and the internal structures of rural industry and rural elites. So in the light of initial dominant environmental conditions, this paper divided the patterns into the following six fundamental types: Agricultural products processing, Mine resources expolitation and processing, Urban radiation, Human capital, Foreign trade and capital and Market processing. Although the environmental conditions are important for the initial development of rural industry, because the structures of rural industry in an area are the results of selection by local rural elites under the given environment, there are different behavior characteristics of power elites and economic elites in fostering a particular pattern, two sub types in every pattern, fostered by rural power elites and by rural economic elites, could be divided. Consequently, the patterns of rural industrial development in China could be divided into six basic types and twelve sub types. At last, this paper respectively investigated the main forming conditions and the principal features of each pattern, the sphere of application of every pattern in China's less developed areas was also discussed.
Identifying codes and locating-dominating sets on paths and cycles
Chunxia Chen,Changhong Lu,Zhengke Miao
Mathematics , 2009,
Abstract: Let $G=(V,E)$ be a graph and let $r\ge 1$ be an integer. For a set $D \subseteq V$, define $N_r[x] = \{y \in V: d(x, y) \leq r\}$ and $D_r(x) = N_r[x] \cap D$, where $d(x,y)$ denotes the number of edges in any shortest path between $x$ and $y$. $D$ is known as an $r$-identifying code ($r$-locating-dominating set, respectively), if for all vertices $x\in V$ ($x \in V\backslash D$, respectively), $D_r(x)$ are all nonempty and different. In this paper, we provide complete results for $r$-identifying codes in paths and odd cycles; we also give complete results for 2-locating-dominating sets in cycles.
Propofol protects against high glucose-induced endothelial adhesion molecules expression in human umbilical vein endothelial cells
Minmin Zhu, Jiawei Chen, Hui Jiang, Changhong Miao
Cardiovascular Diabetology , 2013, DOI: 10.1186/1475-2840-12-13
Abstract: Protein expression of endothelial adhesion molecules, NF-κB, inhibitory subunit of NF-κBα (IκBα), protein kinase Cβ2 (PKCβ2), and phosphorylation of PKCβ2 (Ser660) were measured by Western blot. NF-κB activity was measured by electrophoretic mobility shift assay. PKC activity was measured with SignaTECT PKC assay system. Superoxide anion (O2.-) accumulation was measured with the reduction of ferricytochrome c assay. Human peripheral mononuclear cells were prepared with Histopaque-1077 solution.High glucose induced the expression of endothelial selectin (E-selectin), intercellular adhesion molecule 1 (ICAM-1), vascular cell adhesion molecule 1 (VCAM-1), and increased mononuclear-endothelial adhesion. High glucose induced O2.- accumulation, PKCβ2 phosphorylation and PKC activation. Further, high glucose decreased IκBα expression in cytoplasm, increased the translocation of NF-κB from cytoplasm to nuclear, and induced NF-κB activation. Importantly, we found these high glucose-mediated effects were attenuated by propofol pretreatment. Moreover, CGP53353, a selective PKCβ2 inhibitor, decreased high glucose-induced NF-κB activation, adhesion molecules expression, and mononuclear-endothelial adhesion.Propofol, via decreasing O2.- accumulation, down-regulating PKCβ2 Ser660 phosphorylation and PKC as well as NF-κB activity, attenuated high glucose-induced endothelial adhesion molecules expression and mononuclear-endothelial adhesion.Perioperative hyperglycemia, a metabolic alteration caused by perioperative physiological stress and excessive glucose infusion, was commonly seen in non-diabetics [1] as well as diabetics [2]. Hyperglycemia could up-regulate the expression of endothelial adhesion molecules, such as endothelial selectin (E-selectin), intercellular adhesion molecule 1 (ICAM-1), and vascular cell adhesion molecule 1 (VCAM-1) [3-5], thus augmenting pathological leukocytes-endothelial adhesion [3] and leading to endothelial dysfunction and injury. Accordingly, during

Li Xiaojian Miao Changhong,

地理研究 , 1993,
Abstract: There is no doubt that ambiguous concepts of growth pole exist both in theoretical studies and in worldwide applications. This article clarified Perroux's original growth pole concept and its revised version applied by his followers. After pointing out the weakness of the revised concept and the failure of its practice of regional planning in many countries from Europe and America to Asia and Africa, the authors turned to Perroux's growth pole theorywhich is here considered as an applicable strategy for regional development.In order to seleect, or more exactly to recognize growth poles, it is necessary to propose an approach of starting from macro-economy to micro scope and from propulsive industries to propulsive enterprises. By searching the location (or potential location) of the propulsive enterprises, growth pole can be identified. The quantitative measure of selecting propulsive industries includes 8 indexes. industrial linkages, labourforce linksgea, innovation, comparative advantages, incom elasticrts, policy promotion, structural coordination and product life. After calculating each index, the total propulsive industrial index can be worked out by adding each weight index.By using this approach, the indexes of Kaifeng Municrpality of Henan Provice were computed. The results show that Kaifeng City and lancao Town are two growth poes in the research area.
Desflurane Preconditioning Induces Oscillation of NF-κB in Human Umbilical Vein Endothelial Cells
Juan Yi, Yijun Zheng, Changhong Miao, Jianguo Tang, Biao Zhu
PLOS ONE , 2013, DOI: 10.1371/journal.pone.0066576
Abstract: Background Nuclear factor kappa B (NF-κB) has been implicated in anesthetic preconditioning (APC) induced protection against anoxia and reoxygenation (A/R) injury. The authors hypothesized that desflurane preconditioning would induce NF-κB oscillation and prevent endothelial cells apoptosis. Methods A human umbilical vein endothelial cells (HUVECs) A/R injury model was used. A 30 minute desflurane treatment was initiated before anoxia. NF-κB inhibitor BAY11-7082 was administered in some experiments before desflurane preconditioning. Cells apoptosis was analyzed by flow cytometry using annexin V–fluorescein isothiocyanate staining and cell viability was evaluated by modified tertrozalium salt (MTT) assay. The cellular superoxide dismutases (SOD) activitiy were tested by water-soluble tetrazolium salt (WST-1) assay. NF-κB p65 subunit nuclear translocation was detected by immunofluorescence staining. Expression of inhibitor of NF-κB-α (IκBα), NF-κB p65 and cellular inhibitor of apoptosis 1 (c-IAP1), B-cell leukemia/lymphoma 2 (Bcl-2), cysteine containing aspartate specific protease 3 (caspases-3) and second mitochondrial-derived activator of caspase (SMAC/DIABLO) were determined by western blot. Results Desflurane preconditioning caused phosphorylation and nuclear translocation of NF-κB before anoxia, on the contrary, induced the synthesis of IκBα and inhibition of NF-κB after reoxygenation. Desflurane preconditioning up-regulated the expression of c-IAP1 and Bcl-2, blocked the cleavage of caspase-3 and reduced SMAC release, and decreased the cell death of HUVECs after A/R. The protective effect was abolished by BAY11-7082 administered before desflurane. Conclusions The results demonstrated that desflurane activated NF-κB during the preconditioning period and inhibited excessive activation of NF-κB in reperfusion. And the oscillation of NF-κB induced by desflurane preconditioning finally up-regulated antiapoptotic proteins expression and protected endothelial cells against A/R.
Rolling Generation Dispatch Based on Ultra-short-term Wind Power Forecast  [PDF]
Qiushi Xu, Changhong Deng
Energy and Power Engineering (EPE) , 2013, DOI: 10.4236/epe.2013.54B122

The power systems economic and safety operation considering large-scale wind power penetration are now facing great challenges, which are based on reliable power supply and predictable load demands in the past. A rolling generation dispatch model based on ultra-short-term wind power forecast was proposed. In generation dispatch process, the model rolling correct not only the conventional units power output but also the power from wind farm, simultaneously. Second order Markov chain model was utilized to modify wind power prediction error state (WPPES) and update forecast results of wind power over the remaining dispatch periods. The prime-dual affine scaling interior point method was used to solve the proposed model that taken into account the constraints of multi-periods power balance, unit output adjustment, up spinning reserve and down spinning reserve.

Research on the Model of Optimization and Reorganization of Eco-spatial Structure in Urban Agglomeration Region and Its Application: A Case Study of the Urban Agglomeration in Central Plains Region

GUO Rongchao,MIAO Changhong,XIA Baolin,LI Junfu,

地理科学进展 , 2010,
Abstract: Eco-spatial structure optimization of urban agglomeration will promote economic and social environmental sustainable development in the urban agglomeration region.Based on an exhaustive analysis of the spatial interaction,mutualism,co-evolutionary mechanism and ecological links between the eco-spatial structure and economic-social development of the urban agglomeration,this paper establishes optimized modes of corridor group network in urban agglomeration region by optimizing and reorganizing eco-spatial st...
Viscosity of partially hydrolyzed polyacrylamide under shearing and heat
Changhong Gao
Journal of Petroleum Exploration and Production Technologies , 2013, DOI: 10.1007/s13202-013-0051-4
Abstract: Polymer flooding is the most successful chemical method to enhance oil recovery. This technique has achieved large-scale field application in China. Polymer flooding is also being tested in several heavy oil fields. For oil field applications, partially hydrolyzed polyacrylamide (HPAM) is the most widely used polymer. HPAM must maintain high viscosity to achieve good oil recovery. In reality, however, polymers can be severely degraded by shearing and heat in the underground environment. This phenomenon is studied in this paper. The two HPAM test samples have molecular weight of 10 million and 20 million. The samples were added to water to achieve concentrations of 500 to 3,000 ppm. The first group of tests was conducted to study the effect of shearing on HPAM viscosity. The second group of tests was carried out to evaluate the effect of high temperature up to 90 °C on HPAM viscosity. It was discovered that both shearing and high temperature can severely reduce polymer viscosity. Data analysis shows that the empirical power law parameters are strong functions of polymer concentration and temperature. Simple formulas are proposed to correlate HPAM viscosity with shearing rate, polymer concentration and temperature. These formulas are useful tools for predicting HPAM viscosity in field applications.
Thermally Producing and Weakly Freezing-out Dark Matter in Bouncing Universe
Changhong Li
Physics , 2014, DOI: 10.1103/PhysRevD.92.063513
Abstract: We investigate the production and freeze-out of dark matter with a constant thermally averaged cross-section in a generic bouncing universe framework. Our result shows that, there is a novel avenue that dark matter is produced thermally and take a weakly freezing-out process, besides two previously known cases, the thermally production & strongly freezing-out case and the non-thermally production & weakly freezing-out case, in which the relic abundance of dark matter are inverse and proportional to its cross-section respectively. We calculated the relic abundance of dark matter for this new case, and find its relic abundance is independent of its cross-section. We also present the cosmological constraints on the cross-section and mass relation of dark matter for this new case.
Page 1 /4181
Display every page Item

Copyright © 2008-2017 Open Access Library. All rights reserved.