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Search Results: 1 - 10 of 27615 matches for " Rui Fang "
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Restoration Study of Microorganisms in Lake Water Purification  [PDF]
Fang Yang, Rui Zhu
Engineering (ENG) , 2013, DOI: 10.4236/eng.2013.510B094
Abstract:

We screened the bacteria with restoration and purification functions in lake water and found that,Bacillus subtilishad the highest water purification ability. Photosynthetic bacteria, lactobacillus bacteria, nitrifying bacteria and oligotrophic bacteria also showed different levels of lake water purification and restoration. L1873orthogonal experiments were designed to optimize the ratio of complex agents to get the best ratio of various bacteria as 10g/LBacillus subtilis, 2g/L photosynthetic bacteria, 0.8g/L lactobacillus, 0.6g/L nitrifying bacteria 1, 0.4g/L nitrifying bacteria 2 and 0.6g/L oli-gotrophic bacteria. When lake water was purified for 30 d under this ratio, total phosphorus content decreased 85.90%, total nitrogen content decreased 70.96%, and COD value decreased 81.19%.

Screening and Fermentation Characteristics of PHA Bacteria in Activated Sludge  [PDF]
Fang Yang, Rui Zhu
Engineering (ENG) , 2013, DOI: 10.4236/eng.2013.510B096
Abstract:

Using sludge at the bottom of Hengshui Lake as samples, and screened out the SJ-9 strain with PHA synthesis capability by enrichment, purification, Nile blue staining, far-infrared spectroscopy and gas qualitative and quantitative analysis. The infrared scanning of SJ-9 bacteria product showed that this product was middle chain PHA. Optimization of SJ-9 fermentation conditions obtained the optimal conditions with optimal carbon source of sodium butyrate, optimal C/N of 35, optimal fermentation time of 120 h, and optimal initial pH for culture substrate of 7.0. 10 L fermenter amplification culture under these conditions showed consistent results with flask culture, and the bacteria and PHA had the highest yields at 120 h, with the maximal yields of 6.81 and 2.36 g/L, respectively.

Aerodynamics and Flight Dynamics of Free-Falling Ash Seeds  [PDF]
Rui Fang, Yanlai Zhang, Yanpeng Liu
World Journal of Engineering and Technology (WJET) , 2017, DOI: 10.4236/wjet.2017.54B012
Abstract:
Samaras or winged seeds spread themselves by wind. Ash seed, unlike other samaras, has a high aspect ratio wing which can generate enough lift force to slow down descent by rotating about the vertical axis and spinning around its wing span axis simultaneously. This unique kinematics and inherent fluid mechanism are definitely of great interest. Detailed kinematics of free falling ash seeds were measured using high-speed cameras, then corresponding aerodynamic forces and moments were calculated employing computational fluid dynamics. The results show that both rotating and spinning directions are in the same side and the spinning angular velocity is about 6 times of rotating speed. The terminal descending velocity and cone angles are similar to other samaras. Analysis of the forces and moments shows that the lift is enough to balance the weight and the vertical rotation results from a processional motion of total angular moment because the spin-cycle-averaged aer-odynamic moment is perpendicular to the total angular moment and can only change its direction but maintain its magnitude, which is very similar to a spinning top in processional motion except that the total angular moment of ash seed is not along the spin axis but almost normal to it. The flow structures show that both leading and trailing edge vortices contribute to lift generation and the spanwise spinning results in an augmentation of the lift, implying that ash seeds with high aspect ratio wing may evolve in a different way in utilizing fluid mechanisms to facilitate dispersal.
Two new copper(II) complexes of 1-Butyl-1H-1,2,4-triazole: synthesis, characterization and electrocatalytic activity
Wang, Ke Fei;Jian, Fang Fang;Zhuang, Rui Rui;
Journal of the Brazilian Chemical Society , 2010, DOI: 10.1590/S0103-50532010000400005
Abstract: two new copper(ii) complexes, [cu4cl6o(c6h11 n3)4] (1) and [cubr2(c6h11n3)4] (2), were synthesized and characterized by single crystal x-ray diffractometry, ir spectroscopy and elemental analysis. they were used as bulk modifiers for the fabrication of two carbon paste electrodes (cu-cpe): 1-cpe and 2-cpe. they had similar electrochemical behaviors characterized by cyclic voltammetry and good electrocatalytic activities toward the reduction of hydrogen peroxide and trichloroacetic acid. the detection limits, linear calibration ranges and sensitivities were respectively 0.01 μmol l-1, 0.02 to 0.20 μmol l-1 and 98.80 μa μmol l-1 for hydrogen peroxide detection, and 0.01 μmol l-1, 0.02 to 0.20 μmol l-1 and 80.05 μa μmol l-1 for trichloroacetic acid detection.
An electrochemical sensing platform based on a new copper complex for the determination of hydrogen peroxide and nitrite
Rui Rui Zhuang, Fang Fang Jian and KeFei Wang
Science and Technology of Advanced Materials , 2009,
Abstract: A new copper(II) complex [Cu(C12H23N3)4Br2·2H2O] was synthesized and its structure was characterized by x-ray crystallography and elemental analysis. The copper atom had a distorted octahedron coordination involving two bromide anions and four nitrogen atoms from the 1-decyl-1H-[1,2,4]triazole ligands. Moreover, the electrochemical behavior and electrocatalysis of the carbon paste electrode (Cu-CPE) bulk-modified by the complex have been studied in detail. The Cu-CPE showed excellent electrocatalytic activities toward the reduction of hydrogen peroxide and nitrite, and the detection limit was much lower than that mentioned in earlier reports. This bulk-modified CPE has good reproducibility, long-term stability and surface renewability, which appear promising for constructing chemical sensors.
IfkA, a presumptive eIF2α kinase of Dictyostelium, is required for proper timing of aggregation and regulation of mound size
Rui Fang, Yanhua Xiong, Charles K Singleton
BMC Developmental Biology , 2003, DOI: 10.1186/1471-213x-3-3
Abstract: Neither of the eIF2α kinases appeared to be involved in sensing amino acid starvation to initiate development. However, one of the kinases, IfkA, was shown to phosphorylate eIF2α from 1 to 7 hours after the onset of development, resulting in a shift from polysomes to free ribosomes for bulk mRNA. In the absence of the eIF2α phosphorylation, ifkA null cells aggregated earlier than normal and formed mounds and ultimately fruiting bodies that were larger than normal. The early aggregation phenotype in ifkA null cells reflected an apparent, earlier than normal establishment of the cAMP pulsing system. The large mound phenotype resulted from a reduced extracellular level of Countin, a component of the counting factor that regulates mound size. In wild type cells, phosphorylation of eIF2α by IfkA resulted in a specific stabilization and enhanced translational efficiency of countin mRNA even though reduced translation resulted for bulk mRNA.IfkA is an eIF2α kinase of Dictyostelium that normally phosphorylates eIF2α from 1 to 7 hours after the onset of development, or during the preaggregation phase. This results in an overall reduction in the initiation of protein synthesis during this time frame and a concomitant reduction in the number of ribosomes associated with most mRNAs. For some mRNAs, however, initiation of protein synthesis is enhanced or stabilized under the conditions of increased eIF2α phosphorylation. This includes countin mRNA.Dictyostelium is one of the simplest studied eukaryotes that possesses true multicellularity [1]. Dictyostelium amoebae grow and divide asexually while feeding on bacteria or within an enriched broth. When the food supply is depleted, Dictyostelium cells shut down growth and cell division and enter a developmental program designed to produce and disperse spores. Mounds of about 105 cells form as cells stream together though chemotaxis in response to cAMP pulses. During late aggregation, the initially identical cells differentiate into
Adaptively Accelerated GMRES Fast Fourier Transform Method for Electromagnetic Scattering
Yuan Fang Xin;Ping-Liang Rui
PIER , 2008, DOI: 10.2528/PIER08011603
Abstract: The problem of electromagnetic scattering by 3D dielectric bodies is formulated in terms of a weak-form volume integral equation. Applying Galerkin's method with rooftop functions as basis and testing functions,the integral equation can be usually solved by Krylov-subspace fast Fourier transform (FFT) iterative methods. In this paper,the generalized minimum residual (GMRES)-FFT method is used to solve this integral equation,and several adaptive acceleration techniques are proposed to improve the convergence rate of the GMRES-FFT method. On several electromagnetic scattering problems,the performance of these adaptively accelerated GMRESFFT methods are thoroughly analyzed and compared.
Constraints and Countermeasure Analysis on the Development of Cultural Creative Industry in Jilin Province
Wen FANG,Rui CUI,Honghui WANG
Management Science and Engineering , 2012, DOI: 10.3968/j.mse.1913035x20120604.1881
Abstract: Cultural creative industry is an emerging industry in the 21st century, which is also a new growth point in the local economic development. In recent years, cultural creative industry in Jilin province has made remarkable development effectiveness and plays a great role in promoting the economic growth. However, some problems have been exposed while the rapid development in cultural creative industry. This paper aimed at studying the main constraints of the development of cultural creative industry in Jilin province, so that it can be promoted to a sustainable and healthy development. Key words: Cultural creative industry; Constraints; Creative
Analysis of the Coordination of International Policies Based on the Mundell-Fleming Model
Rui Cui,Wen Fang,Weiyi Wang
International Journal of Business and Management , 2010, DOI: 10.5539/ijbm.v5n9p188
Abstract: IS-LM-BP model is the model of the interior and exterior double-imbalance state linking the interior economy with the international market in the opening economy. By applying the IS-LM-BP model in the economies of two economic entities, the international coordination effect of the opening economy macro policies are analyzed based on the view of the IS-LM-BP model, and the positive interaction of the macro policy international coordination between the China in the double imbalance with the interior stagnancy and the exterior surplus and the developed economic entity in the double imbalance with interior stagnancy and the exterior trade deficit in the global economic crisis is summarized and analyzed, and accordingly the short-term, middle-term, and long-term macro polices are suggested for China to realize the stable development of macro economy in the post-financial crisis.
Genetic spectrum assignment model with constraints in cognitive radio networks
Fang Ye,Rui Yang,Yibing Li
International Journal of Computer Network and Information Security , 2011,
Abstract: The interference constraints of genetic spectrum assignment model in cognitive radio networks are analyzed in this paper. An improved genetic spectrum assignment model is proposed. The population of genetic algorithm is divided into two sets, the feasible spectrum assignment strategies and the randomly updated spectrum assignment strategies. The penalty function is added to the utility function to achieve the spectrum assignment strategy that satisfies the interference constraints and has better fitness. The proposed method is applicable in both the genetic spectrum assignment model and the quantum genetic spectrum assignment mode. It can ensure the randomness of partial chromosomes in the population to some extent, and reduce the computational complexity caused by the constraints-free procedure after the update of population. Simulation results show that the proposed method can achieve better performance than the conventional genetic spectrum assignment model and quantum genetic spectrum assignment model
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