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Search Results: 1 - 10 of 27566 matches for " Qinglong Hu "
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Several Theorems for the Trace of Self-conjugate Quaternion Matrix
Qinglong Hu,Limin Zou
Modern Applied Science , 2009, DOI: 10.5539/mas.v2n5p21
Abstract: The purpose of this paper is to discuss the inequalities for the trace of self-conjugate quaternion matrix. We present the inequality for eigenvalues and trace of self-conjugate quaternion matrices. Based on the inequality above, we obtain several inequalities for the trace of quaternion positive definite matrix.
New solutions to an open problem
Qinglong Huang
International Journal of Mathematical Analysis , 2012,
Abstract:
Expression of phospho-ERK1/2 and PI3-K in benign and malignant gallbladder lesions and its clinical and pathological correlations
Qinglong Li, Zhulin Yang
Journal of Experimental & Clinical Cancer Research , 2009, DOI: 10.1186/1756-9966-28-65
Abstract: Immunohistochemistry was used to detect and compare the frequency of p-ERK1/2 and PI3-K expression in gallbladder adenocarcinoma, peri-tumor tissues, adenomatous polyps, and chronic cholecystitis specimens.The positive staining for p-EKR1/2 and PI3-K were 63/108 (58.3%) and 55/108 (50.9%) in gallbladder adenocarcinoma; 14/46 (30.4%) and 5/46 (10.1%) in peri-tumor tissues; 3/15 (20%) and 3/15 (20%) in adenomatous polyps; and 4/35 (11.4%) and 3/35 (8.6%) in chronic cholecystitis. The positive rate of p-ERK1/2 or PI3-K in gallbladder adenocarcinoma was significantly higher than that in peri-tumor tissue (both, P < 0.01), adenomatous polyps (p-ERK1/2, P < 0.01; PI3-K, P < 0.05), and chronic cholecystitis (both, P < 0.01). The positive staining for p-ERK1/2 or PI3-K was significantly lower in well/highly-differentiated adenocancinomas with maximal diameter < 2.0 cm, no metastasis to lymph node, and no infiltration of regional tissues or organs compared to poorly-differentiated adenocarcinomas which are characterized by a maximal diameter ≥ 2.0 cm, with metastasis to lymph node and infiltration of regional tissues or organs (P < 0.05 or P < 0.01). Moreover, the frequency of p-ERK1/2 expression in gallbladder adenocarcinomas without gallstone was significantly lower than those with gallstones. Increased expression of p-ERK1/2 (P < 0.05) and PI3K (P = 0.062) was associated with decreased overall survival. Multivariate Cox regression analysis showed that increased p-ERK1/2 expression was an independent prognostic predictor in gallbladder carcinoma (P = 0.028).Increased expression of p-ERK1/2 and PI3K might contribute to gallbladder carcinogenesis. p-ERK1/2 over-expression is correlated with decreased survival and therefore may serve as an important biological marker in development of gallbladder adenocarcinoma.Gallbladder cancer is a relatively rare but terminal malignancy occurring predominantly in elderly women. It accounts for nearly two-thirds of biliary tract cancers, m
The linear stability of elliptic Euler-Moulton solutions of the n-body problem via those of 3-body problems
Qinglong Zhou,Yiming Long
Mathematics , 2015,
Abstract: In this paper, we study the linear stability of the elliptic collinear solutions of the classical $n$-body problem, where the $n$ bodies always stay on a straight line, and each of them moves on its own elliptic orbit with the same eccentricity. Such a motion is called an elliptic Euler-Moulton collinear solution. Here we prove that the corresponding linearized Hamiltonian system at such an elliptic Euler-Moulton collinear solution of $n$-bodies splits into $(n-1)$ independent linear Hamiltonian systems, the first one is the linearized Hamiltonian system of the Kepler $2$-body problem at Kepler elliptic orbit, and each of the other $(n-2)$ systems is the essential part of some linearized Hamiltonian system at an elliptic Euler collinear solution of the $3$-body problem whose mass parameter is modified. Then using analytical results proved by Zhou and Long in [21] and by Hu and Ou in [5] on $3$-body Euler solutions, the linear stability of such a solution in the $n$-body problem is reduced to those of the corresponding elliptic Euler collinear solutions in the $3$-body problems. As an example, we carried out the detailed derivation of the linear stability for an elliptic Euler-Moulton solution of the $4$-body problem with two small masses in the middle.
Maslov-type indices and linear stability of elliptic Euler solutions of the three-body problem
Qinglong Zhou,Yiming Long
Mathematics , 2015,
Abstract: In this paper, we use the central configuration coordinate decomposition to study the linearized Hamiltonian system near the elliptic Euler solutions. Then using the Maslov-type \omega-index theory of symplectic paths and the theory of linear operators we compute the \omega-indices and obtain certain properties of linear stability of the Euler elliptic solutions of the classical three-body problem.
Equivalence of linear stabilities of elliptic triangle solutions of the planar charged and classical three-body problems
Qinglong Zhou,Yiming Long
Mathematics , 2015, DOI: 10.1016/j.jde.2015.01.045
Abstract: In this paper, we prove that the linearized system of elliptic triangle homographic solution of planar charged three-body problem can be transformed to that of the elliptic equilateral triangle solution of the planar classical three-body problem. Consequently, the results of Mart\'{\i}nez, Sam\`{a} and Sim\'{o} ([15] in J. Diff. Equa.) of 2006 and results of Hu, Long and Sun ([6] in Arch. Ration. Mech.Anal.) of 2014 can be applied to these solutions of the charged three-body problem to get their linear stability.
Video Inter-Frame Forgery Identification Based on Consistency of Correlation Coefficients of Gray Values  [PDF]
Qi Wang, Zhaohong Li, Zhenzhen Zhang, Qinglong Ma
Journal of Computer and Communications (JCC) , 2014, DOI: 10.4236/jcc.2014.24008
Abstract:

Identifying inter-frame forgery is a hot topic in video forensics. In this paper, we propose a method based on the assumption that the correlation coefficients of gray values is consistent in an original video, while in forgeries the consistency will be destroyed. We first extract the consistency of correlation coefficients of gray values (CCCoGV for short) after normalization and quantization as distinguishing feature to identify interframe forgeries. Then we test the CCCoGV in a large database with the help of SVM (Support Vector Machine). Experimental results show that the proposed method is efficient in classifying original videos and forgeries. Furthermore, the proposed method performs also pretty well in classifying frame insertion and frame deletion forgeries.

Antiviral Treatment Alters the Frequency of Activating and Inhibitory Receptor-Expressing Natural Killer Cells in Chronic Hepatitis B Virus Infected Patients
Juan Lv,Qinglong Jin,Haibo Sun,Xiumei Chi,Xiaoli Hu,Hongqing Yan,Yu Pan,Weihua Xiao,Zhigang Tian,Jinlin Hou,Damo Xu,Zhengkun Tu,Junqi Niu
Mediators of Inflammation , 2012, DOI: 10.1155/2012/804043
Abstract: Natural killer (NK) cells play a critical role in innate antiviral immunity, but little is known about the impact of antiviral therapy on the frequency of NK cell subsets. To this aim, we performed this longitudinal study to examine the dynamic changes of the frequency of different subsets of NK cells in CHB patients after initiation of tenofovir or adefovir therapy. We found that NK cell numbers and subset distribution differ between CHB patients and normal subjects; furthermore, the association was found between ALT level and CD158b+ NK cell in HBV patients. In tenofovir group, the frequency of NK cells increased during the treatment accompanied by downregulated expression of NKG2A and KIR2DL3. In adefovir group, NK cell numbers did not differ during the treatment, but also accompanied by downregulated expression of NKG2A and KIR2DL3. Our results demonstrate that treatment with tenofovir leads to viral load reduction, and correlated with NK cell frequencies in peripheral blood of chronic hepatitis B virus infection. In addition, treatments with both tenofovir and adefovir in chronic HBV infected patients induce a decrease of the frequency of inhibitory receptor+ NK cells, which may account for the partial restoration of the function of NK cells in peripheral blood following treatment. 1. Introduction Chronic infection with hepatitis B virus (HBV) affects more than 350 million people worldwide and continues to be an important cause of morbidity and mortality [1]. The current therapy for chronic hepatitis B (CHB) is based on the use of immunomodulators like pegylated interferon or nucleos(t)ide analogues (NUCs) that inhibit both the priming and the elongation steps of viral DNA replication [2–10]. The high cost, side effects, and the fact that potent antiviral response can be only achieved in a minor population of patients limit the clinical use of PEG-IFN. In addition, as the off-treatment durability of response to NUCs is generally low, it is required to maintain a long-term continuous therapy when patients treated with NUCs. However, long-term continuous therapy with NUCs carries significant risks of occurrence of viral resistance, drug toxicity as well as unsustainable cost for many of the most heavily affected countries. All of these guidelines support both NUCs and PEG-IFN as first-line treatment options, but the optimal choice for individual patients remains controversial. The choice of therapy is determined by many factors including the stage of the disease, serum alanine transaminase (ALT), HBV DNA levels, and eAg status of the patient. Both
The Initial-Boundary Problem for a Class of the Third Order Non-Linear Pseudoparabolic Equations
一类三阶非线性伪抛物方程的初边值问题

WU Jiancheng,HUANG Qinglong,
吴建成

系统科学与数学 , 2008,
Abstract: Non-linear pseudoparabolic equation is currently of much interest because it arises in a variety of important physical processes. In this article, by using homeomorphism method, the above problem is investigated. An existence theorem of solutions for the problem is given. Also, an existence and uniqueness theorem of the semilinear equations is proved.
Poly[(μ2-3,6-di-4-pyridyl-1,2,4,5-tetrazine)(μ2-thiocyanato)copper(I)]
Yiming Wu,Qinglong Meng,Chi Zhang
Acta Crystallographica Section E , 2010, DOI: 10.1107/s1600536810001431
Abstract: The title compound, [Cu(NCS)(C12H8N6)]n, is a self-assembled two-dimensional metal–organic network. The Cu atom is linked by two N atoms from two 3,6-di-4-pyridyl-1,2,4,5-tetrazine ligands and by the N and S atoms from two thiocyanate ligands in a distorted tetrahedral environment. The Cu atom and the thiocyanate ligand occupy a crystallographic mirror plane m, and a crystallographic inversion centre is in the middle of the tetrazine ring, generating the zigzag fashion of the two-dimensional network. The infinite –Cu—SCN—Cu—SCN– chain is due to translational symmetry along the a axis. These chains are further connected through the 3,6-di-4-pyridyl-1,2,4,5-tetrazine ligands that bridge the CuI centers, generating a two-dimensional network. There are π—π stacking interactions between the pyridine and tetrazine rings (perpendicular distances of 3.357 and 3.418 ), with a centroid–centroid distance of 3.6785 (16) .
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