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Search Results: 1 - 10 of 55878 matches for " Bin Xu "
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Perineal Electric Burn Reconstruction Using Modified Thoraco-Umbilical Flap  [PDF]
Bin Xu, Jinlong Wang
International Journal of Clinical Medicine (IJCM) , 2016, DOI: 10.4236/ijcm.2016.77050
Abstract: Perineal reconstruction is an essential component of the overall treatment plan of perineal electric burn, but it is a very difficult and complex job. The modified thoraco-umbilical flap may be a perfect way of repairing perineal area. It is based on the deep inferior epigastric artery and vein and the superior epigastric artery and vein, which look like the “reverse TRAM flap”. The large flap could be fashioned into a perfect perineal area without the need for free flap. It left a satisfactory donor scar, and it avoided the need to change the patient’s position during the operation. Four cases were reconstructed by modified thoraco-umbilical flap after perineal electric burn, and all of them were satisfied with the results. The modified thoraco-umbilical flap has been emerged as a very useful reconstructive tool and is particularly valuable in reconstruction of the perineal electric burn.
Recent advances in pharmacologic study of natural anticancer agents in China
Xu, Bin;
Memórias do Instituto Oswaldo Cruz , 1991, DOI: 10.1590/S0074-02761991000600014
Abstract: in this paper a number of anticancer agents of natural origin will be presented. hydroxycamtothecin (hcpt) was found to produce a strong inhibitory action on a variety of animal tumors. it is also effective for treatment of patients with gastric carcinoma, liver carcinoma, tumor of head and neck or leukemia. pharmacologic studies showed that it could depress s phase of tumor cells significantly and cause formation of cellular chromatid breaks. by means of alkaline elution and nick translation methods it has been proved that hcpt induced dna singlo strand breaks remarkably. homoharringyonine (hhrt) was shown to be effective against acute leukemia. recent experiments in tumor-bearing mice inidcated that (hhrt) could diminish tumor metastasis. using molecular hybridization technique it was demonstrated that (hhrt) decreased the content of c-myc rna in the cytoplasm but not in the nuclei. lycobetaine (lbt) poddrddrf dytnh inhibitory effects on a number of ascites tumors. in clinical trials it was against ovarian and gastric carcinomas. it is able to intercalate into dna. oxalysine (oxl) is a new antibiotic and shown to be effective against tumor metastatis. when used in combination with 5-fu, its anticancer action could be enhanced. other natural compounds such as indirubin, ?-elemene, irisquinone, oridonine, norcantharidin and psp have been also found to possess antitumor action.
Exploring the Academic Collaboration Chance in Open Research Community
Bin Xu
Information Technology Journal , 2012,
Abstract: Due to the advance of information technology and the widely-used social network on Internet, research is being done in an open environment. While the researchers may share the published research achievements in paper format, its essential for the research groups to find the potential academic collaboration chance between them and the large scale academic social network. This article is to present our solution to find the chance of academic collaboration between different research groups in such an open research community. A prototype has been made and the core algorithms and an experiment with main interfaces are introduced.
Realizing Large Virtual Web-Based Collaborative E-Commerce with B2X Middleware
Information Technology Journal , 2009,
Abstract: E-commerce enterprises are facing the challenges from globalization. However, it costs much time and budget in building and maintaining web-based collaborative e-commerce platforms. It’s also difficult to integrate several collaborative platforms into a larger platform, so as to make better collaboration. Manual collaboration between different platforms results in non-timely information exchange in large scale e-commerce and un-efficient end-to-end business collaboration. Yet a new cost efficient middleware, B2X (business to any), is proposed to integrate different e-commerce platforms and related protocols are defined. The architecture and related protocol of B2X are presented. A prototype of B2X has been built and a continuous integration model for large virtual web-based B2B (Business to Business) collaboration with B2X is presented to enhance the collaboration between the e-commerce enterprises.
A Data Secure Solution for Heterogeneous Enterprise Legacy Systems Integration
Bin Xu
Journal of Software , 2009, DOI: 10.4304/jsw.4.6.622-629
Abstract: To stay competitive, enterprises have to meet or even exceed the expectations of consumers. Business data integration can be an efficient integration method for the enterprises with several distributed departments and heterogeneous legacy business systems. Due to the different functionalities of the different business departments, the access authority to the business data is different. This paper suggests yet a new method to establish a security business data integration framework among heterogeneous legacy business systems.
Asymptotic behavior of $L^2$-normalized eigenfunctions of the Laplace-Beltrami operator on a closed Riemannian manifold
Bin Xu
Mathematics , 2005,
Abstract: Let $e(x,y,\l)$ be the spectral function and ${\chi}_\l$ the unit band spectral projection operator, with respect to the Laplace-Beltrami operator $\D_M$ on a closed Riemannian manifold $M$. We firstly review the one-term asymptotic formula of $e(x,x,\l)$ as $\l\to\infty$ by H{\" o}rmander (1968) and the one of $\p^\al_x\p^\bt_y e(x,y,\l)|_{x=y}$ as $\l\to\infty$ in a geodesic normal coordinate chart by the author (2004) and the sharp asymptotic estimates from above of the mapping norm $\|\chi_\l\|_{L_2\to L_p}$ ($2\leq p\leq\infty$) by Sogge (1988 $&$ 1989) and of the mapping norm $\|\chi_\l\|_{L_2\to {\rm Sobolev} L_p}$ by the author (2004). In the paper we show the one term asymptotic formula for $e(x,y,\l)$ as $\l\to\infty$, provided that the Riemannian distance between $x$ and $y$ is ${\rm O}(1/\l)$. As a consequence, we obtain the sharp estimate of the mapping norm $\|\chi_\l\|_{L_2\to C^\d}$ ($0<\d<1$), where $C^\d(M)$ is the space of H{\" o}lder continuous functions with exponent $\d$ on $M$. Moreover, we show a geometric property of the eigenfunction $e_\l$: $\D_M e_\l+\l^2 e_\l=0$, which says that $1/\l$ is comparable to the distance between the nodal set of $e_\l$ (where $e_\l$ vanishes) and the concentrating set of $e_\l$ (where $e_\l$ attains its maximum or minimum) as $\l\to\infty$.
The Degree of Symmetry of Certain Compact Smooth Manifolds II
Bin Xu
Mathematics , 2005, DOI: 10.1007/s11401-005-0578-x
Abstract: In this paper, we give the sharp estimates for the degree of symmetry and the semi-simple degree of symmetry of certain four dimensional fiber bundles by virtue of the rigidity theorem of harmonic maps due to Schoen and Yau. As a corollary of this estimate, we compute the degree of symmetry and the semi-simple degree of symmetry of ${\Bbb C}P^2\times V$, where $V$ is closed smooth manifold admitting a real analytic Riemannian metric of non-positive curvature. In addition, by the Albanese map, we obtain the sharp estimate of the degree of symmetry of a compact smooth manifold with some restrictions on its one dimensional cohomology.
Compact Group Actions On Closed Manifolds of Non-positive Curvature
Bin Xu
Mathematics , 2005,
Abstract: A. Borel proved that, if a finite group $F$ acts effectively and continuously on a closed aspherical manifold $M$ with centerless fundamental group $\pi_1(M)$, then a natural homomorphism $\psi$ from $F$ to the outer automorphism group ${\rm Out} \pi_1(M)$ of $\pi_1(M)$, called the associated abstract kernel, is a monomorphism. In this paper, we investigate to what extent Borel's theorem holds for a compact Lie group $G$ acting effectively and smoothly on a particular orientable aspherical manifold $N$ admitting a Riemannian metric $g_0$ of non-positive curvature in case that $\pi_1(N)$ has a non-trivial center. It turns out that if $G$ attains the maximal dimension equal to the rank of Center $\pi_1(N)$ and the metric $g_0$ is real analytic, then any element of $G$ defining a diffemorphism homotopic to the identity of $N$ must be contained in the identity component $G^0$ of $G$. Moreover, if the inner automorphism group of $\pi_1(N)$ is torsion free, then the associated abstract kernel $\psi: G/G^0\to {\rm Out} \pi_1(N)$ is a monomorphism. The same result holds for the non-orientable $N$'s under certain techical assumptions. Our result is an application of a theorem by Schoen-Yau (Topology, {\bf 18} (1979), 361-380) on harmonic mappings.
On a lifting problem of L-packets
Bin Xu
Mathematics , 2015,
Abstract: Let $G \subseteq \tilde{G}$ be two quasisplit connected reductive groups over a local field of characteristic zero and $G_{der} = \tilde{G}_{der}$. Although the existence of L-packets is still conjectural in general, it is believed that the L-packets of $G$ should be the restriction of that of $\tilde{G}$. Motivated by this, we hope to construct the L-packets of $\tilde{G}$ from that of $G$. The primary example in our mind is when $G = Sp(2n)$, whose L-packets have been determined by Arthur (2013), and $\tilde{G} = GSp(2n)$. As a first step, we need to consider some well-known conjectural properties of L-packets. In this paper, we show how they can be deduced from the conjectural endoscopy theory. As an application, we obtain some structural information about L-packets of $\tilde{G}$ from that of $G$.
On M?glin's parametrization of Arthur packets for p-adic quasisplit $Sp(N)$ and $SO(N)$
Bin Xu
Mathematics , 2015,
Abstract: We give a survey on M{\oe}glin's construction of representations in the Arthur packets for $p$-adic quasisplit symplectic and orthogonal groups. The emphasis is on comparing M{\oe}glin's parametrization of elements in the Arthur packets with that of Arthur (2013). This comparison has already been done in the original works of M{\oe}glin, so our goal is only to make it more transparent.
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