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Search Results: 1 - 10 of 56102 matches for " Zhou Hui "
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Numerical Simulation of the Thin Film Coating Flow in Two-Dimension  [PDF]
Zhiyong Liang, Hui Zhou
Open Journal of Fluid Dynamics (OJFD) , 2017, DOI: 10.4236/ojfd.2017.73021
Abstract: Thin film coating is a process of making liquid film cover and deposit base body surface by the way of dipping, spraying, sliding or spin coating, which is a kind of modern surface engineering. It plays an important role in the actual processing, such as improving the surface properties, fine processing, and new surface properties. Analysis of the influence of substrating morphology and fluid flow properties itself on coating fluid motion has an important significance to optimize the thin film coating and improve the quality of the final film. The influence from uneven substrate surface’s geometry configuration on internal motion of the flow field in slip-coating is analyzed by using the FLUENT software as a calculation platform. A two-dimension model of slip coating under isosceles triangle and isosceles trapezoid substrate was established, and thin film coating fluid motions under different configuration parameters were simulated. It is pointed out that the key factor determining the turbulence generation and evolution is the parameter of substrating surface nature. The effects of the change of Reynolds number on turbulent appearance and action area are studied. The velocity contours of fluid field on different substrate surfaces are shown, and the impact of substrate geometry on the backwater region is analyzed.
Diaquabis(2,2′-bi-1H-imidazole-κ2N3,N3′)nickel(II) bis(3-methylbenzoate) 3-methylbenzoic acid disolvate
Zhou Hui
Acta Crystallographica Section E , 2009, DOI: 10.1107/s1600536809044705
Abstract: In the title compound, [Ni(C6H6N4)2(H2O)2](C8H7O2)2·2C8H8O2, the NiII atom (site symmetry overline{1}) is coordinated by two N,N′-bidentate 2,2′-biimidazole ligands and two water molecules, resulting in a slightly distorted trans-NiO2N4 geometry for the metal ion. In the crystal, the components are linked by N—H...O and O—H...O hydrogen bonds, generating an infinite two-dimensional network running parallel to (100). The methyl group of the benzoic acid molecule is disordered over two sites in a 0.563 (17):0.437 (17) ratio.
Bis(2,2′-bi-1H-imidazole-κ2N3,N3′)bis(4-methylbenzoato-κO)copper(II)
Zhou Hui
Acta Crystallographica Section E , 2009, DOI: 10.1107/s1600536809044262
Abstract: In title compound, [Cu(C8H7O2)2(C6H6N4)2], the CuII atom (site symmetry overline{1}) is coordinated by two N,N′-bidentate 2,2′-biimidazole ligands and two weakly bonded 4-methylbenzoate anions, resulting in a strongly elongated trans-CuO2N4 octahedral geometry. In the crystal, adjacent molecules are linked via pairs of N—H...O hydrogen bonds into chains propagating in [010].
Body language in Business Negotiation
Hui Zhou
International Journal of Business and Management , 2009, DOI: 10.5539/ijbm.v3n2p90
Abstract: Human beings communicate through a variety of channels. Language is not the sole means by which humans exchange information. In conversation, we express our ideas and feelings not only with words but also through facial expressions, voice tones, and gestures. These non-verbal languages are called “Body Language”. It is just like our verbal language, is also a part of our culture.
Weighted Pseudo-almost Periodic Solutions of Neutral Integral and Differential Equations
Hui Zhou,Zongfu Zhou
Journal of Mathematics Research , 2011, DOI: 10.5539/jmr.v3n4p74
Abstract: In this paper, we study weighted pseudo-almost periodic solutions to general neutral integral equations. By applying the properties of weighted pseudo-almost periodic functions and the fixed point theorem, we establish the conditions for the existence and uniqueness of weighted pseudo-almost periodic solutions of the equations.
The Effects of China-EU Trade on CO2 Emissions  [PDF]
Hui Zhou, Jie Cao, Jichuan Sheng
Low Carbon Economy (LCE) , 2013, DOI: 10.4236/lce.2013.44A002
Abstract:

Production for international trade has played an important role in driving the rapid increase of Chinese CO2 emissions. This paper uses input-output analysis to quantitatively estimate the effect of the bilateral trade between China and its present largest trading partner, the European Union (EU), on both national and global CO2 emissions. The results show that under the bilateral trade, China’s emissions from 2002 to 2008 increased by 2458 MMT (6.64%), and the EU’s emissions decreased by 539 MMT (1.81%). From a global perspective, the trade led to an increase of 1919 MMT CO2 in the world’s total emissions. The trading pattern is not dominated by pollution haven effect but by the comparative advantages in factor endowments. It is suggested that a consumer responsibility-based accounting system of national CO2 inventory should be introduced in replace of the present producer responsibility-based one. In order to achieve cost efficiency in emissions reduction in the new accounting system, more CDM programs could be established.

Improve the Government Strategic Petroleum Reserves  [PDF]
Xiucheng Dong, Zhongbing Zhou, Hui Li
Advances in Chemical Engineering and Science (ACES) , 2013, DOI: 10.4236/aces.2013.34A1001
Abstract: The potentiality that the current government strategic petroleum reserves (GSPRs) can be improved by the pre-allocation of GSPR drawing rights has been neglected. This paper proposes to pre-allocate the GSPR drawing rights, and proves that by doing this the efficiency of GSPR and the society’s incentive to finance GSPR can be improved. Particularly, the example demonstrates that the incentive improvement can be very significant. Since it takes huge expenditure on GSPR and it is very important to gain support from the consumers by improving GSPR, the proposal is quite worth considering.

 

A Liability Division Method for Harmonic Pollution Based on Line-Transferred Power Components  [PDF]
Jianchun Peng, Jun Zhou, Hui Jiang
Journal of Power and Energy Engineering (JPEE) , 2015, DOI: 10.4236/jpee.2015.34035
Abstract:

The existing liability division methods for harmonic pollution are either inexplicit or incomplete in physical meaning. To compensate these defects, two new methods are proposed based on line-transferred power components in this paper. At first, all harmonic sources are represented by ideal equivalent current source, line current components and bus voltage components of a source are determined by stimulation of this source with all other sources disabled. Then, the line-trans- ferred power component owing to a source under all sources action together is determined by the theory of line-transferred power components, and called source’s line-transferred power component. At last, the liability of a source for line-end harmonic pollution is divided by two methods: the ration of the source’s line-transferred active power component to the total line-transferred power, and the ration of projection of the source’s line-transferred complex power component to absolute value of the total line-transferred complex power. These two methods are taken into account not only harmonic voltage but also harmonic current in the liability division. Simulation results show that the proposed liability division method based on active power component is the most effective and ideal one.

On the Scalable Fairness and Efficient Active Queue Management of RED  [PDF]
Hui WANG, Xiao-Hui LIN, Kai-Yu ZHOU, Nin XIE, Hui LI
Int'l J. of Communications, Network and System Sciences (IJCNS) , 2009, DOI: 10.4236/ijcns.2009.21009
Abstract: Internet routers generally see packets from a fast flow more often than a slow flow. This suggests that network fairness may be improved without per-flow information. In this paper, we propose a scheme using Most Recently Used List (MRUL)-a list storing statistics of limited active flows that sorted in most recently seen first mode-to improve the fairness of RED. Based on the list, our proposed scheme jointly considers the identification and punish of the fast and unresponsive fast flows, and the protection of slow flows. Its performance improvements are demonstrated with extensive simulations. Different from the previous proposals, the complexity of our proposed scheme is proportional to the size of the MRUL list but not coupled with the queue buffer size or the number of active flows, so it is scalable and suitable for various routers. In addition, another issue we address in this paper is queue management in RED. Specifically, we replace the linear packet dropping function in RED by a judicially designed nonlinear quadratic function, while original RED remains unchanged. We call this new scheme Nonlinear RED, or NLRED. The underlying idea is that, with the proposed nonlinear packet dropping function, packet dropping becomes gentler than RED at light traffic load but more aggressive at heavy load. As a result, at light traffic load, NLRED encourages the router to operate in a range of average queue sizes rather than a fixed one. When the load is heavy and the average queue size approaches the pre-determined maximum threshold (i.e. the queue size may soon get out of control), NLRED allows more aggressive packet dropping to back off from it. Simulations demonstrate that NLRED achieves a higher and more stable throughput than RED and REM. Since NLRED is fully compatible with RED, we can easily upgrade/replace the existing RED implementations by NLRED.
tRNAs as regulators in gene expression
Yan Li,Hui Zhou
Science China Life Sciences , 2009, DOI: 10.1007/s11427-009-0039-y
Abstract: Transfer RNAs (tRNAs) hold a central place in protein synthesis by interpreting the genetic information stored in DNA into the amino acid sequence of protein, thus functioning as “adaptor” molecules. In recent years, however, various studies have shown that tRNAs have additional functions beyond participating in protein synthesis. When suffering from certain nutritional stresses, tRNAs change the level of aminoacylation to became uncharged, and these uncharged tRNAs act as effector molecules to regulate global gene expression, so that the stressed organism copes with the adverse environmental stresses. In budding yeast and certain mammalian cells, the retrograde movement of mature tRNAs from cytoplasm to nucleus serves as a mechanism for the surveillance system within the nucleus to continue monitoring the integrity of tRNAs. On the other hand, this retrograde action effectively reduces the global protein synthesis level under conditions of nutritional starvation. Quite recently, various publications have shown that tRNAs are not stable molecules in an absolute sense. Under certain physiological or environmental stresses, they are specifically cleaved into fragments of different lengths in the anticodon loop or anticodon left arm. These cleavages are not a meaningless random degradation phenomenon. Instead, a novel class of signal molecules such as tRNA halves or sitRNAs may be produced, which are closely correlated with the modulation of global gene expression. Investigation of the regulatory functions of tRNAs is a frontier, which seeks to reveal the structural and functional diversity of tRNAs as well as their vital functions during the expression of genetic information.
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