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Search Results: 1 - 10 of 113603 matches for " ZHANG Mei "
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Periphyton Biomass Response to Phosphorus Additions in an Aquatic Ecosystem Dominated by Submersed Plants  [PDF]
Xueying Mei, Xiufeng Zhang
Journal of Environmental Protection (JEP) , 2013, DOI: 10.4236/jep.2013.41009
Abstract:

An experiment was conducted to investigate the response of periphyton biomass to addition of phosphorus (P) in an aquatic ecosystem dominated by submersed plants. Aquatic ecosystems dominated by Hydrilla verticillata (L.f.) Royle and Vallisneria natans (Lour.) Hara were constructed in mesocosm aquaria. Mesocosms were dosed weekly with different P loads (0 μg/L/Week and 100 μg/L/Week) for 17 weeks. Total P (TP), total soluble P (TSP), and soluble reactive P (SRP) concentrations in the waters of mesocosms added with P were significantly higher as opposed to the unenriched control mesocosms. The biomass of the attached periphyton and the cover of floating periphyton remained abundant in P-unenriched control mesocosms throughout the test period with a TP, TSP, and SRP concentration ranging of 0.021 - 0.049 mg/L, 0.004 - 0.024 mg/L, and 0.003 - 0.018 mg/L, respectively. P addition caused the decline of attached periphyton biomass to a low level and loss of floating periphyton. Results indicate that P enrichment in an aquatic ecosystem dominated by submersed plants could reduce attached periphyton biomass and eliminate floating periphyton. The research would be useful to maintain periphyton by reducing excessive P in aquatic ecosystem dominated by submersed plants.


An Empirical Research on Interactive Relationship of Urban Housing Prices in China: Analysis of Six Major Cities  [PDF]
Qian Zhang, Dexiang Mei
Low Carbon Economy (LCE) , 2015, DOI: 10.4236/lce.2015.62008
Abstract: This paper applies non-linear granger causality test and impulse response function method to analyze the spillover effect of housing prices fluctuation among six major Chinese cities, namely, Beijing, Shanghai, Guangzhou, Shenzhen, Tianjin and Chongqing. Results indicate that fluctuation of urban housing prices in the short term is a wide range of positive spillover effect, and then the effect will gradually disappear. The spillover effect of housing prices fluctuation and cities’ space distance do not necessarily exist relationship; at the same time, Shanghai housing price fluctuation has a great influence on other cities generally. Accordingly, relevant policy suggestions are put forward.
Solar magnetic field: The key to understanding the Sun
Mei Zhang
Chinese Science Bulletin , 2011, DOI: 10.1007/s11434-011-4846-8
Abstract:
Translation Manipulated by Ideology and Poetics—A Case Study of The Jade Mountain
Mei Zhang
Theory and Practice in Language Studies , 2012, DOI: 10.4304/tpls.2.4.754-758
Abstract: Beyond the traditional linguistic analysis in translation studies, this paper goes further to look into the relationship between translation and history, society, and culture. According to André Lefevere, translation is a rewriting or manipulation of an original text and all rewritings reflect a certain ideology and poetics. This paper takes Witter Bynner’s translation The Jade Mountain as an example to elaborate how ideology and poetics manipulate poetry translation, including the choice of theme and translation strategy. Generally speaking, if translations are not in conflict with culture’s ideology and dominant poetics, they are easier to be accepted. That’s the reason why The Jade Mountain has received great popularity both as translations from the Chinese and as English poetry in the West.
Application of Data Mining Technology in Digital Library
Mei Zhang
Journal of Computers , 2011, DOI: 10.4304/jcp.6.4.761-768
Abstract: With the rapid development of computer technology and network technology, it ushers in a new Internet era characterized by information and knowledge. There is an urgent need for a new generation of technologies and methods to help exploit the treasures of information, and to be refined, so as to become useful knowledge. Data mining is the core part of knowledge discovery. Its techniques and methods have great application space and value in the digital library. Data mining technology can help people to develop vast amounts of information in depth, extract the inherent link of the heterogeneous information to promote the digital library. This paper describes technologies relating with data mining, introduces the process of data mining, illustrates the main features, explores applications of three aspects in the digital library, indicates application meaning, analyzes the key problems of implementation in digital libraries, and finally take a study case on analysis of low utilization readers in Linyi university library by decision tree algorithm.
Manipulation in Poetry Translation
Mei Zhang
Asian Social Science , 2012, DOI: 10.5539/ass.v8n4p297
Abstract: Traditional poetry translation studies often emphasize on the reproduction of the form or meaning and the translatability of poetry, not beyond the constraints of linguistic analysis. This paper sets out to discuss English translation of Chinese poems within a larger social, political and cultural context. According to André Lefevere, the leading representative of “Cultural school”, translation is a rewriting or manipulation of an original text mainly influenced by three social and cultural factors, that is, ideology, dominant poetics and patronage. Translation doesn’t go on in a vacuum and is bound to reflect a certain ideology and poetics. Translators from different social-historical backgrounds are manipulated by different ideology, poetics and patronage, and often rewrite the original to different degrees to meet the target cultural demands in different times.
Helicity transport from solar convection zone to interplanetary space
Mei Zhang
Physics , 2012, DOI: 10.1017/S1743921313003062
Abstract: Magnetic helicity is a physical quantity that describes field topology. It is also a conserved quantity as Berger in 1984 demonstrated that the total magnetic helicity is still conserved in the corona even when there is a fast magnetic reconnection. It is generally believed that solar magnetic fields, together with their helicity, are created in the convection zone by various dynamo processes. These fields and helicity are transported into the corona through solar photosphere and finally released into the interplanetary space via various processes such as coronal mass ejections (CMEs) and solar winds. Here I will give a brief review on our recent works, first on helicity observations on the photosphere and how to understand these observations via dynamo models. Mostly, I will talk about what are the possible consequences of magnetic helicity accumulation in the corona, namely, the formation of magnetic flux ropes, CMEs taking place as an unavoidable product of coronal evolution, and flux emergences as a trigger of CMEs. Finally, I will address on in what a form magnetic field in the interplanetary space would accommodate a large amount of magnetic helicity that solar dynamo processes have been continuously producing.
Heterogeneous Degradation of Dyes in Industrial Effluent over Fenton-Like Nano-Fe2O3/Goldmine Complex  [PDF]
Kun Zhao, Mindong Zhang, Mei Huang
Journal of Geoscience and Environment Protection (GEP) , 2015, DOI: 10.4236/gep.2015.310004
Abstract:

Nano-Fe2O3/goldmine complex was obtained by chemical coprecipitation reaction on the surface of goldmine waste-solid. Being used as the heterogeneous catalyst in Fenton-like advanced oxidation processes (AOPs), its treatment effect was studied in the removal performance of industrial dyes effluent. Although the maximal COD removal efficiency would reach 35.4% when 5 mL NaClO was added in 100 mL industrial dyes effluent, it is found that by using nano-Fe2O3/goldmine system, the COD removal efficiency of 13,000 mg/L dyes wastewater could reach up to 75.5% in the presence of 30 g/L nano-Fe2O3/goldmine complex and 50 mL/L NaClO at 50C.

Decision-Making in Dual-Channel Green Supply Chain Considering Market Structure  [PDF]
Yong-Mei Xu, Ping Zhang
Journal of Service Science and Management (JSSM) , 2018, DOI: 10.4236/jssm.2018.111011
Abstract: With the increasing awareness of environmental protection among consumers, green products are increasingly favored by the general public. The rapid development of e-commerce has increased the channels for consumers to contact and purchase green products. In this paper, consumers’ perceived differences in product greenness among different channels are considered and three models of manufacturer-dominated Stackelberg game, retailer-dominated Stackelberg game and Nash equilibrium with equal power are constructed based on the difference pricing between online and offline channels. Also, the results of dual-channel structure are compared with those of single-channel respectively. The results show that when the green R & D costs are relatively high, manufacturers and retailers are motivated to compete as channel leaders, but for the entire supply chain, Nash’s decision-making can improve product greenness and profitability of the supply chain. When green R & D costs are low, manufacturers’ profits are higher under asymmetric power supply chains and lowest under vertical Nash decisions. Under the three kinds of power structure, product greenness and manufacturer’s profit are higher than single channel under dual-channel structure. The comparison of retailer’s profit in dual channel and single channel depends on green R & D costs.
Self-Coexistence Strategy in Heterogeneous Cognitive Radio Networks  [PDF]
Qiang Zhang, Yong Zhang, Mei Song, Dawei Dang
Int'l J. of Communications, Network and System Sciences (IJCNS) , 2017, DOI: 10.4236/ijcns.2017.105B031
Abstract:
Different from general cognitive wireless networks, there is no centralized scheduling and management infrastructure among heterogeneous cognitive networks. Multiple cells may operate in the same vicinity resulting in unfair spectrum occupation time (when the cells belong to different industries) and degraded performance of the cellular networks. A distributed self-coexistence mechanism is necessary. In this paper, we take the self-coexistence of multi users in heterogeneous scenarios as the problem of spectrum allocation in non-cooperative mode. Hence we propose Fair Self-Coexistence Strategy (FSCS). In this strategy, not only the fairness of occupation time is considered, but also different competitive priority metric based on Quality of Service (QoS) is adopted. Each cognitive cell independently completes the spectrum allocation process, by use of sensing techniques and perceptual information about neighboring network cells. The simulation experiment results show that our spectrum allocation strategy guarantees the fairness among the heterogeneous secondary networks. And in the resource scarce environment, our strategy can effectively achieve the differentiation competition results.
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