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Search Results: 1 - 10 of 130841 matches for " Hong Zhang "
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Kite Modeling for Higher Altitude Wind Energy  [PDF]
Hong Zhang
Energy and Power Engineering (EPE) , 2013, DOI: 10.4236/epe.2013.57052
Abstract:

Among the renewable energy sources, high altitude wind power is gaining increased attention for its better strength, steadiness, and coverage compared to the traditional ground-based wind power with wind turbines. However, unlike the latter, the technology for high altitude wind is still immature and the works on the field are mostly empirical. In our research, we try to set up a framework about force analysis and provide a stepping stone for other kite energy researchers and engineers to develop more efficient systems. In this paper, we analyzed and experimentally verified the effects of acting aerodynamic forces at different angles of attack ranging from 0° to 90°. We also studied the power potentials of a kite corresponding to these varying forces. The work will enable a researcher or engineer to design a more feasible and more efficient kite power system with better understanding of the kite dynamics.


Finding Multiple Length-Bounded Disjoint Paths in Wireless Sensor Networks  [PDF]
Kejia Zhang, Hong Gao
Wireless Sensor Network (WSN) , 2011, DOI: 10.4236/wsn.2011.312045
Abstract: In a wireless sensor network, routing messages between two nodes s and t with multiple disjoint paths will increase the throughput, robustness and load balance of the network. The existing researches focus on finding multiple disjoint paths connecting s and t efficiently, but they do not consider length constraint of the paths. A too long path will be useless because of high latency and high packet loss rate. This paper deals with such a problem: given two nodes s and t in a sensor network, finding as many as possible disjoint paths connecting s and t whose lengths are no more than L, where L is the length bound set by the users. By now, we know that this problem is not only NP hard but also APX complete [1,2], which means that there is no PTAS for this problem. To the best of our knowledge, there is only one heuristic algorithm proposed for this problem [3], and it is not suitable for sensor network because it processes in a centralized way. This paper proposes an efficient distributed algorithm for this problem. By processing in a distributed way, the algorithm is very communication efficient. Simulation results show that our algorithm outperforms the existing algorithm in both aspects of found path number and communication efficiency.
Steffensen-Type Method of Super Third-Order Convergence for Solving Nonlinear Equations  [PDF]
Zhongli Liu, Hong Zhang
Journal of Applied Mathematics and Physics (JAMP) , 2014, DOI: 10.4236/jamp.2014.27064
Abstract:

In this paper, a one-step Steffensen-type method with super-cubic convergence for solving nonlinear equations is suggested. The convergence order 3.383 is proved theoretically and demonstrated numerically. This super-cubic convergence is obtained by self-accelerating second-order Steffensen’s method twice with memory, but without any new function evaluations. The proposed method is very efficient and convenient, since it is still a derivative-free two-point method. Its theoretical results and high computational efficiency is confirmed by Numerical examples.

Exchange Rate Pass-Through into China’s Import Prices: An Empirical Analysis Based on ARDL Model  [PDF]
Peipei Hong, Fangfang Zhang
Open Journal of Social Sciences (JSS) , 2016, DOI: 10.4236/jss.2016.44003
Abstract: This study analyzes the exchange rate pass-through into China aggregate import prices and prices of eleven industries under the HS classification. Chinese monthly data from July 2005 to July 2015 are used. Bounds test finds that all industries have co-integration relationship, with the exception of footwear and headgear products (HS12) and transport equipment (HS17). We have researched the short- and long-run pass-through to China import prices with ARDL model and the estimated results are as follows: the degree of exchange rate pass-through to China’s aggregate import prices is very high; both the short- and long-run coefficients for various industries are fairly different; the pass-through coefficient is high in industries of basic metals and metal products, chemical products, pulp and paper products, plastic and rubber products; the degree of pass-through is comparatively low in industries of textiles products, raw hides, leather and furs products, wood and wooden products and non-metallic mineral products; the pass-through into import prices for industries of machinery and equipment (HS16) is incomplete.
L(2,1)-Labeling of the Brick Product Graphs  [PDF]
Xiujun Zhang, Hong Yang, Hong Li
Journal of Applied Mathematics and Physics (JAMP) , 2017, DOI: 10.4236/jamp.2017.58126
Abstract: A k-L(2,1)-labeling for a graph G is a function \"\" such that \"\" whenever \"\" and \"\" whenever u and v are at distance two apart. The λ-number for G, denoted by λ(G), is the minimum k over all k-L(2,1)-labelings of G. In this paper, we show that \"\" for \"\" or 11, which confirms Conjecture 6.1 stated in [X. Li, V. Mak-Hau, S. Zhou, The L(2,1)-labelling problem for cubic Cayley graphs on dihedral groups, J. Comb. Optim. (2013) 25: 716-736] in the case when \"\" or 11. Moreover, we show that?\"\" if 1) either \"\" (mod 6), m is odd, r = 3, or 2) \"\" (mod 3), m is even (mod 2), r = 0.
Autonomic Software Component QoS Matchmaking Algorithm Based on Fidelity Factor in Agent-Based Autonomic Computing System  [PDF]
Kun Zhang, Manwu Xu, Hong Zhang
Journal of Software Engineering and Applications (JSEA) , 2009, DOI: 10.4236/jsea.2009.22015
Abstract: Autonomic software component (ASC) QoS matchmaking problem for autonomic element has been taken as one of the most important issue in field of autonomic computing based on agent. Aimed at overcoming drawbacks such as subjec-tiveness and unfairness, and improving the self-configuration capability for autonomic element, we introduce evalua-tion mechanism of confidence of individual QoS attributes during ASC QoS matchmaking, i.e., fidelity factor for each attribute, and propose an ASC QoS matchmaking algorithm based on fidelity factor. Simulation experiments demon-strate that our proposed algorithm performs best performance in terms of QoS than other existing algorithms, and has better compromise between attribute quality and users’ evaluation when selecting ASC.
Does anesthetic provide similar neuroprotection to therapeutic hypothermia after cardiac arrest?
Hong Zhang
Critical Care , 2010, DOI: 10.1186/cc8923
Abstract: Therapeutic hypothermia has been shown to provide neuroprotection against ischemic injury after cardiac arrest in in vitro and in vivo models. In the previous issue of Critical Care, Meybohm and colleagues [1] demonstrate that cardiac arrest triggers the release of cerebral inflammatory cytokines in pigs' cerebral cortex. Therapeutic hypothermia alters inflammatory response in cardiac arrest and subsequent cardiopulmonary resuscitation. The combination of hypothermia with sevoflurane post-conditioning does not confer additional anti-inflammatory effects compared with hypothermia alone.Cardiac arrest remains the leading cause of death in the US and Europe, with an out-of-hospital cardiac arrest survival-to-discharge rate of less than 10%. In-hospital cardiac arrest presents a dismal prognosis. According to a large in-hospital registry, the survival-to-discharge rate is 18%, whereas that of a developing country is 6.9% [2,3]. Without prompt care, the chance for meaningful survival falls dramatically within minutes of arrest onset. When immediate care is available and victims are successfully resuscitated, the majority of these initial survivors subsequently suffer crippling neurologic injury or die in the few days following the cardiac arrest event. Thus, improving survival and brain function after initial resuscitation from cardiac arrest remains a critical challenge. Therapeutic hypothermia, introduced more than six decades ago, remains an important neuroprotective factor in cardiac arrest. Laboratory studies have demonstrated that cooling after resuscitation from cardiac arrest improves both survival as well as subsequent neurologic and cardiac function and has few side effects. these findings have been reproduced using a variety of cooling techniques in different species, including rats, dogs, and pigs.However, physician use of hypothermia induction in patients resuscitated from cardiac arrest is low. In 2003, Abella and colleagues [4] reported that 87% of US phys
Evaluation of Practical Process Aspects for Lipozyme TL IM Catalyzed Bulk Fat Modification in a Batch Reactor
Hong Zhang
The Open Biotechnology Journal , 2007, DOI: 10.2174/1874070700701010072]
Abstract: A few issues to apply Lipozyme TL IM-catalyzed interesterification for bulk fat modification were investigated in a batch reactor system with concerning practical process development. The hydrolyzed products, i.e. free fatty acids and diglycerides, generated from the Lipozyme TL IM-catalyzed interesterification process due to water participation, can be minimized by enzyme pre-treatment. For the interesterified products, free fatty acids formed by hydrolysis had softening effect on solid fat content and diglycerides retarded crystal transformation during storage. Reaction time was more critical for the reduction of acyl migration than the control of water content in the system. The temperature effect on the rate of interesterification in terms of Q10 value was determined as 1.3, meaning that the increase of reaction rate was limited by the increase of temperature. Therefore, for practical implementations, a temperature of 60-70 °C which the feed stock can be totally melted for the reaction should be used in consideration of enzyme stability. The quality of feedstock was confirmed to be critical to maintain the enzyme activity and the refined, bleached, and deodorized oil should be used as the feedstock.
Tissue and host tropism of influenza viruses: Importance of quantitative analysis
Hong Zhang
Science China Life Sciences , 2009, DOI: 10.1007/s11427-009-0161-x
Abstract: It is generally accepted that human influenza viruses preferentially bind to cell-surface glycoproteins/glycolipids containing sialic acids in α2,6-linkage; while avian and equine influenza viruses preferentially bind to those containing sialic acids in α2,3-linkage. Even though this generalized view is accurate for H3 subtype isolates, it may not be accurate and absolute for all subtypes of influenza A viruses and, therefore, needs to be reevaluated carefully and realistically. Some of the studies published in major scientific journals on the subject of tissue tropism of influenza viruses are inconsistent and caused confusion in the scientific community. One of the reasons for the inconsistency is that most studies were quantitative descriptions of sialic acid receptor distributions based on lectin or influenza virus immunohistochemistry results with limited numbers of stained cells. In addition, recent studies indicate that α2,3- and α2,6-linked sialic acids are not the sole receptors determining tissue and host tropism of influenza viruses. In fact, determinants for tissue and host tropism of human, avian and animal influenza viruses are more complex than what has been generally accepted. Other factors, such as glycan topology, concentration of invading viruses, local density of receptors, lipid raft microdomains, coreceptors or sialic acid-independent receptors, may also be important. To more efficiently control the global spread of pandemic influenza such as the current circulating influenza A H1N1, it is crucial to clarify the determinants for tissue and host tropism of influenza viruses through quantitative analysis of experimental results. In this review, I will comment on some conflicting issues related to tissue and host tropism of influenza viruses, discuss the importance of quantitative analysis of lectin and influenza virus immunohistochemistry results and point out directions for future studies in this area, which should lead to a better understanding of tissue and host tropism of influenza viruses.
Multiple Particle Swarm Optimizers with Diversive Curiosity
Hong Zhang
Lecture Notes in Engineering and Computer Science , 2010,
Abstract:
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