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Search Results: 1 - 10 of 83330 matches for " Xuan Liu "
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Professor Wang Qingqi's experience in treating senile diseases based on the theory of blood stasis
Xuan LIU
Zhong Xi Yi Jie He Xue Bao , 2010,
Abstract:
Beijing Salt Company: The Way to Deal with the Salt Reform Program  [PDF]
Yongsheng Liu, Tong Han, Xuan Wei
American Journal of Industrial and Business Management (AJIBM) , 2016, DOI: 10.4236/ajibm.2016.612109
Abstract: After the implementation of the Salt Industry System Reform Program, other domestic salt enterprises will compete for the market share of salt in Beijing. With the method of SWOT, this paper analyzes the advantages, disadvantages, opportunities and challenges of Beijing Salt Industry Company after the implementation of the salt industry system reform, and puts forward to seize the transition period, make close cooperation with the upstream enterprises; innovate business models, improve the service level; optimize the logistics links, reduce the cost of circulation; enrich product variety, improve the precision marketing; use new packaging, and strengthen the development of counterfeit brand countermeasure.
Maximal graded subalgebras of Witt and Special superalgebras
Wende Liu,Xuan Liu
Mathematics , 2009,
Abstract: This paper has been withdrawn by the author due to that the main results and approaches are closedly parallel to the ones in Lie algebra case.
Flow-Induced Vibration Analysis of Supported Pipes Conveying Pulsating Fluid Using Precise Integration Method
Long Liu,Fuzhen Xuan
Mathematical Problems in Engineering , 2010, DOI: 10.1155/2010/806475
Abstract: Dynamic analysis of supported pipes conveying pulsating fluid is investigated in Hamiltonian system using precise integration method (PIM). First, symplectic canonical equations of supported pipes are deduced with state variable vectors composed of displacement and momentum. Then, PIM with linear interpolation formula is proposed to solve these equations. Finally, this approach's precision is testified by several numerical examples of pinned-pinned pipes with different fluid velocities and frequencies. The results show that PIM is an efficient and rapid approach for flow-induced dynamic analysis o f supported pipes. 1. Introduction As the pipes are widely used in many industrial fields, flow-induced vibration analysis of pipes conveying fluid has been one of the attractive subjects in structural dynamics. It is well known that pipeline systems may undergo divergence and flutter types of instabilities generated by fluid-structure interaction. Over the last sixty years, extensive studies have been carried out on dynamic analysis of pipeline systems subject to different boundary conditions and loadings. Notable contributions in this area include the works of Chen [1] and Paidoussis [2, 3]. At present, most of the research is concentrated on nonlinear dynamic analysis of pipes conveying pulsating fluid. A recent survey on bifurcations for supported pipes can be found in [4]. Folley and Bajaj [5] considered nonlinear spatial dynamic characteristics of cantilever pipes conveying fluid. In most cases, the corresponding ordinary differential motion equations of fluid-conveyed pipes are deduced using Galerkin’s method in Lagrange system. Then many numerical methods, such as transfer matrix method, finite element method, perturbation method, Runge-Kutta method, and differential quadrature method, are applied to solve these equations. For example, Jensen [6] analyzed dynamic behaviors of vibrating pipe containing fluid subject to lateral resonant base excitation using the perturbation method of multiple scales. Yang et al. [7] investigated the effect of fluid viscosity and mass ratio on instability regions of a Kelvin-type viscoelastic pipe conveying harmonically pulsating fluid using multiple scales method. Wang et al. [8] studied the nonlinear dynamics of curved fluid conveying pipe with differential quadrature method. Jeong et al. [9] proposed a finite element model of pipes conveying periodically pulsating fluid and analyzed the influence of fluid velocities on pipe's stability. Stangl et al. [10] solved the extended version of Lagrange nonlinear equations for
Aquaculture Enclosures Relate to the Establishment of Feral Populations of Introduced Species
Xuan Liu, Yiming Li
PLOS ONE , 2009, DOI: 10.1371/journal.pone.0006199
Abstract: Many species introduced by humans for social and economic benefits have invaded new ranges by escaping from captivity. Such invasive species can negatively affect biodiversity and economies. Understanding the factors that relate to the establishment of feral populations of introduced species is therefore of great importance for managing introduced species. The American Bullfrog (Lithobates catesbeianus) is one species that has escaped from farms, and it is now found in the wild in China. In this study, we examined influences of two types of bullfrog farm (termed simple and elaborate farm enclosures) on the establishment of feral populations of this species in 137 water bodies in 66 plots in four provinces of China. The likelihood of establishment of bullfrog populations in water bodies in plots with simple enclosures (49/89 = 55.1%) was higher than those with elaborate enclosures (3/48 = 6.3%). Based on the Akaike Information Criterion, the minimum adequate model of generalized linear mixed models with a binomial error structure and a logit link function showed that the establishment or failure of bullfrog populations in water bodies was positively correlated with the presence of a simple enclosure, the number of bullfrogs raised and the presence of permanent water in a plot, but negatively correlated with distance from a bullfrog farm and the occurrence of frequent hunting. Results therefore suggest that a simple farm enclosure can increase the establishment of feral bullfrog populations compared with an elaborate enclosure. Our findings are the first to quantify the importance of improving farming enclosures to control and minimize the risk from introduced species.
Follicular growth, differentiation and atresia
Xuan Jin,Yixun Liu
Chinese Science Bulletin , 2003, DOI: 10.1007/BF03184054
Abstract: Only limited numbers of primordial follicles in mammalian ovary grow and differentiate to reach the stage of dominate follicles and ovulate. 99% of the follicles in the ovary undergo atresia at various stages of development. Regulation of follicular growth, development and atresia is a complex process and involves interactions between endocrine factors and intraovarian regulators. This review summarized: i) FSH may not be a survival factor in regulating slow-growing preantral follicles. Some locally produced growth factors, activin and orphan receptors might play a more important role at this stage. ii) Estrogen, activin/ inhibin and follistatin coordinate with FSH to regulate and control follicle differentiation. iii) There are two types of follicular atresia induced by apoptosis which originates from GC or oocyte, respectively. Early translation of tPA mRNA into tPA protein in oocyte may be associated with oocyte apoptosis.
Poly[diaqua(μ3-succinato)cadmium(II)]
Xuan-Wen Liu
Acta Crystallographica Section E , 2009, DOI: 10.1107/s1600536809011593
Abstract: The title compound, [Cd(C4H4O4)(H2O)2]n, has been synthesized under hydrothermal conditions. The asymmetric unit consists of one Cd2+ cation, one succinate anion and two aqua ligands. The Cd atoms present a distorted pentagonal bipyramidal coordination and are bridged into layers parallel to (201) by succinate ligands.
On Chinese Loanwords in English
Xuan Liu,Lanqin Zhang
Theory and Practice in Language Studies , 2011, DOI: 10.4304/tpls.1.12.1816-1819
Abstract: As a common phenomenon, languages borrow words from each other. The object of this paper is to study Chinese loanwords in English. It concentrates on the study of the history, source languages and transmission languages of Chinese loanwords in English and pays much attention to the approaches of borrowing. It also attempts to discuss the cultural influence of Chinese loanwords on English and to demonstrate that loaning is not only a linguistic but also a socio-linguistic phenomenon. In the hope that it can help English learners develop an interest and appreciation for English loanwords from Chinese and help them enlarge their vocabulary efficiently. It is also expected that foreigners can better understand Chinese culture by reading this paper.
Land Administration System structured Land rent residuals and China’s urban sprawl – A Case Study of Dashi, Guangzhou
Liu Xuan,Li Xun
Urbani Izziv , 2012,
Abstract: Urban sprawl has been at the centre of current debate on urban structure. Compared to the rich literature on urban sprawl in Western cities, relatively little is known about the physical consequence and the causes of urban sprawl in China. In China, for peasant collective-owned land (COL), land use right cannot be sold, transferred or leased for non-agricultural construction’. COL could be developed until it is acquired and leased out by the government. Through the process of land acquisition, the peasants could only get the compensation for 30 years' average of annual agricultural production value in addition to compensation for attachments, crops and vegetables which sometimes could hardly support the life of peasants who lost their land. To compensation for the peasants’ loss, the government would leave 10-15% of the acquired land to peasant collectives as Collectively Owned Economic Development Land (COEDL), allowing it used for industrial or commercial purpose. However, development of COEDL manifested to have low development density, quality and output. With a property rights approach, this research evaluates the development process of COEDL in Guangzhou. It has been revealed that high cost to obtain the permit of land use change (nongzhuanyong zhibiao), and to provide infrastructure and public facilities reduce the incentives of peasants to use COEDL legally and more efficiently. Furthermore, as COEDL is forbidden to transfer or mortgage, the financing ability of peasant collectives is thus impaired severely, allowing them only low investment on development. Use of COEDL thus contributes to urban sprawl in China.
Three Problems in Co-governance Mechanism
Xuan Jiang,Dan Liu
International Business Research , 2009, DOI: 10.5539/ibr.v2n1p142
Abstract: The co-governance mechanism based on the stakeholder theory is suspected because of “three problems” from mainstream economists. In this article, we adopt many methods such as literature induction and mathematical demonstration to solve three problems in the co-governance mode and offer theoretical proofs for multiple benefit bodies participating co-governance.
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