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Search Results: 1 - 10 of 42984 matches for " Wenbin Xu "
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Multiferroic hexagonal ferrites (h-RFeO$_3$, R=Y, Dy-Lu): an experimental review
Xiaoshan Xu,Wenbin Wang
Physics , 2014, DOI: 10.1142/S0217984914300087
Abstract: Hexagonal ferrites (h-RFeO$_3$, R=Y, Dy-Lu) have recently been identified as a new family of multiferroic complex oxides. The coexisting spontaneous electric and magnetic polarizations make h-RFeO$_3$ rare-case ferroelectric ferromagnets at low temperature. Plus the room-temperature multiferroicity and predicted magnetoelectric effect, h-RFeO$_3$ are promising materials for multiferroic applications. Here we review the structural, ferroelectric, magnetic, and magnetoelectric properties of h-RFeO$_3$. The thin film growth is also discussed because it is critical in making high quality single crystalline materials for studying intrinsic properties.
Improved Estimates for Nitrogen and Oxygen IsotopeBudget Balance of Tropospheric N2O

Xu Wenbin,

环境科学 , 1999,
Abstract: In steady state,the nitrogen and oxygen isotope budgets from the global N2O sources which are uniformly depleted in heavy isotopes and isotopically lighter than the tropospheric N2O are balanced respectively to the returned N2O from stratosphere enriched in the heavy isotopesKim and Craig(1993) failed to make their estimated results balanceThis paper improves Kim and Graigs estimation method based upon global N2O sources and their emissions updatedWhen considering isotopic fractionation effects during N2O producing in soils and the latitude effect for nitrogen and oxygen isotopic ratios of N2O,the results can make nitrogen and oxygen isotopes budget of tropospheric N2O approximately balanceFurthermore,this paper puts forward future studies which can validate above results
On the optimal convergence rate of a Robin-Robin domain decomposition method
Wenbin Chen,Xuejun Xu,Shangyou Zhang
Mathematics , 2011,
Abstract: In this work, we solve a long-standing open problem: Is it true that the convergence rate of the Lions' Robin-Robin nonoverlapping domain decomposition(DD) method can be constant, independent of the mesh size $h$? We closed this twenty-year old problem with a positive answer. Our theory is also verified by numerical tests.
Analysis of environmental factors about cerebral stroke  [PDF]
Wenbin Liu
Health (Health) , 2013, DOI: 10.4236/health.2013.512263

In this paper, the disease of cerebral stroke is studied mainly. According to the basic information of the patient, Linear fitting method is applied to calculate between the number of sick and age by using MATLAB software. According to data of pressure, temperature and humidity, nondimensionalizing by normalization method, linear regressions are analysed between the number of the patient and pressure, temperature, humidity. According to the important feature and the key indicators of cerebral stroke, high-risk groups are proposed to the early warning and intervene.

The Neural Pathway of Reflex Regulation of Electroacupuncture at Orofacial Acupoints on Gastric Functions in Rats
Jianhua Liu,Wenbin Fu,Wei Yi,Zhenhua Xu,Nenggui Xu
Evidence-Based Complementary and Alternative Medicine , 2012, DOI: 10.1155/2012/753264
Abstract: Acupuncture has a reflex regulation in gastrointestinal functions, which is characterized with segment. In the present study, the neural pathway of electroacupuncture (EA) at orofacial acupoints (ST2) on gastric myoelectric activity (GMA) in rats was investigated. The results indicated that EA at ST2 facilitated spike bursts of GMA, which is similar to EA at limbs and opposite to EA at abdomen. The excitatory effect was abolished by the transaction of infraorbital nerves, dorsal vagal complex lesion, and vagotomy, respectively. In addition, microinjection of L-glutamate into the nucleus of the solitary tract (NTS) attenuated the excitatory effect. All these data suggest that the dorsal vagal complex is involved in the reflex regulation of EA at orofacial acupoints on gastric functions and NTS-dorsal motor nucleus of the vagus (DMV) inhibitory connections may be essential for it. 1. Introduction Acupuncture has been applied in the clinic to treat gastrointestinal (GI) diseases for thousands of years in China and Zusanli acupoint (ST36) is viewed as a classic acupoint in treating GI diseases in the textbook of Traditional Chinese Medicine. Recently, numerous clinical and experimental studies have shown that acupuncture is effective in treating GI disorders and regulating GI functions, including gastric motility, gastric acid secretion, and gastric myoelectric activity (GMA) [1–7]. It is noteworthy that, however, acupuncture at different regions induces different effects. For example, acupuncture at limbs enhances GI motility via vagal efferents [2, 3, 7], and acupuncture at the abdomen inhibits GI motility via sympathetic efferents [4], suggesting that the reflex regulation of acupuncture on GI tract is characterized with segment. In these studies, investigators notice that superspinal structures are involved in this process and dorsal vagal complex (DVC) may be an important candidate [1, 2, 4]. In our previous works, electroacupuncture (EA) at ST36 or orofacial acupoints promote GMA and induce c-fos expression in the nucleus of the solitary tract (NTS) [2, 8, 9]. Meanwhile, electrophysiological data show that there are convergent neurons of somatoviscera in the NTS simultaneously reactive to acupuncture stimuli and gastric distension [10]. It seems that DVC may be a major target of acupuncture in the regulation of gastric functions. The DVC consists of the NTS, which receives primary afferent input from the GI tract, and the dorsal motor nucleus of the vagus (DMV), which contains the efferent vagal motor neurons innervating the GI tract. Therefore, the
Therapeutic Application of Pineapple Protease (Bromelain): A Review
Bitange Nipa Tochi,Zhang Wang,Shi - Ying Xu,Wenbin Zhang
Pakistan Journal of Nutrition , 2008,
Abstract: Bromelain (EC is a crude extract from the pineapple (Ananas comosus) plant that contains, among other components various closely related proteinases (stem bromelain, fruit bromelain, comosain and ananain) demonstrating both in vitro and in vivo several therapeutic properties including malignant cell growth, thrombus formation, inflammation, control of diarrhoea, dermatological and skin debridement among others. Bromelain also contains peroxidase, acid phosphatase, several protease inhibitors and organically bound calcium and remains stable over a wide range of pH 2 to 9. Available evidence indicates bromelain is well absorbed orally with its therapeutic effects being enhanced in a dose dependent manner. It has been demonstrated to be safe and an effective food supplement. However, all the mechanisms of its action remain unresolved.
The Neural Pathway of Reflex Regulation of Electroacupuncture at Orofacial Acupoints on Gastric Functions in Rats
Jianhua Liu,Wenbin Fu,Wei Yi,Zhenhua Xu
Evidence-Based Complementary and Alternative Medicine , 2012, DOI: 10.1155/2012/753264
The Complete Mitochondrial Genome of Bean Goose (Anser fabalis) and Implications for Anseriformes Taxonomy
Gang Liu, Lizhi Zhou, Lili Zhang, Zijun Luo, Wenbin Xu
PLOS ONE , 2013, DOI: 10.1371/journal.pone.0063334
Abstract: Mitochondrial DNA plays an important role in living organisms, and has been used as a powerful molecular marker in a variety of evolutionary studies. In this study, we determined the complete mtDNA of Bean goose (Anser fabalis), which is 16,688 bp long and contains 13 protein-coding genes, 2 rRNAs, 22 tRNAs and a control region. The arrangement is similar to that of typical Anseriform species. All protein-coding genes, except for Cyt b, ND5, COI, and COII, start with an ATG codon. The ATG start codon is also generally observed in the 12 other Anseriform species, including 2 Anser species, with sequenced mitochondrial genomes. TAA is the most frequent stop codon, one of three–TAA, TAG, and T- –commonly observed in Anseriformes. All tRNAs could be folded into canonical cloverleaf secondary structures except for tRNASer(AGY) and tRNALeu(CUN), which are missing the dihydrouridine (DHU) arm. The control region of Bean goose mtDNA, with some conserved sequence boxes, such as F, E, D, and C, identified in its central domain. Phylogenetic analysis of complete mtDNA data for 13 Anseriform species supports the classification of them into four major branches: Anatinae, Anserinae, Dendrocygninae and Anseranatidae. Phylogenetic analyses were also conducted on 36 Anseriform birds using combined Cyt b, ND2, and COI sequences. The results clearly support the genus Somateria as an independent lineage classified in its own tribe, the Somaterini. Recovered topologies from both complete mtDNA and combined DNA sequences strongly indicate that Dendrocygninae is an independent subfamily within the family Anatidae and Anseranatidae represents an independent family. Based on the results of this study, we conclude that combining ND2, Cyt b, and COI sequence data is a workable solution at present for resolving phylogenetic relationships among Anseriform species in the absence of sufficient complete mtDNA data.
Game Perspectives of DEA Models and Their Duals
Fang Xu,DaQun Zhang,GuoLiang Yang,WenBin Liu
Journal of Applied Mathematics , 2013, DOI: 10.1155/2013/879325
Abstract: We present a series of two-person games, which lead to various DEA models. The relationship between the DEA models and the games is explicit in our setting, although the Nash equilibrium solutions do not generally exist. Besides the classic DEA models, we also establish an explicit relationship between the games and some extended DEA models, such as free disposable hull DEA models and “negative” or “inverted” DEA models. 1. Introduction DEA has widely been used in performance evaluation or productivity evaluation. The DEA models have been derived from different perspectives like econometrics and operations research; see for example, Charnes et al. [1], Banker et al. [2], and Liu et al. [3] for the details. Also, several researchers found that there are close connections between DEA and the game theory [4]. As a pioneer, Banker et al. [5, 6] explored the connections between DEA and the game theory. In their work, they first built the following payoff matrix: In their formulation, the DMU0 being evaluated acts as player 1, who wishes to maximize its payoff and has pure strategies defined by the selection of some inputs . On the other hand, player 2 acts as a “central evaluator,” who wishes to minimize the payoff of player 1 and has pure strategies defined by the selection of a competitive DMU . Then, the authors used a mixed strategy formed from the pure strategies and computed an expected payoff function constructed from the finite payoff matrix above. They formulated the game model as the pair of linear programming problems shown in Table 1. Table 1 After several transformations of the problem (*), the authors obtained the “CCR ratio form,” which is also the maximal expected gains that DMU0 can obtain from the corresponding payoff matrix. However, the game model developed by Banker [5] requires that the output in the model is a number. Banker et al. [6] extended their initial work to include multiple outputs, but they had to replace the original CCR model with the BCC model, which makes it possible to write the linear programming problem for player 2 directly. To establish a rigorous connection between the CCR model and the game theory, Rousseau and Semple [7] developed a class of two-person ratio efficiency games, which have ratio payoff functions solved by two equivalent primal and dual linear programming problems. The authors argued that “the richest information is available from the primal-dual linear programs: one side emphasizes “envelopment” multipliers, the other emphasizes input-output multipliers.” And the most general form of the games is
Family History of Cancer and Smoking Cessation, Is There a Role for Physicians?  [PDF]
Wenbin Liang, Tanya Chikritzhs
International Journal of Clinical Medicine (IJCM) , 2012, DOI: 10.4236/ijcm.2012.31002
Abstract: Aim: This study aims to investigate the relationships among family history of cancer, physician’s advice on quitting, and motivation to quit among smokers in the United State. Method: This study using data collected by the 2010 National Health Interview Survey. Five separate sets of multivariate logistic regression models were used to investigate the three-direction relationships among: 1) effect of family cancer history on medical doctors’ advice on quitting, 2) effect of family cancer history on motivation to quit smoking, 3) effect of doctor’s advice on smokers’ motivation to quit. Results: Smoking cessation advice given by physicians has a significant effect on both smoker’s motivation and action taken to quit smoking, but a large proportion of the smokers with family cancer history did not receive doctor’s advice on quitting. Conclusion: Family history of lung cancer or other cancer types was not found to be associated with increased motivation to quit smoking. This is at least partly due to poor collection of family cancer history by physicians. This may be ameliorated by promoting the use of a recently developed self-administered tool for the collection of patient data on family cancer history in primary care settings.
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