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In this paper, we discuss the uniqueness limit cycle and the question of bifurcate about a class of general Liénard equation in the system .

当二次系统添加一个三次项变为三次系统后，这两个系统在原点附近的极限环的变化情况是否存在某种联系，亦是一个十分有趣的问题。

In order to get the exact value of the Hopf bifurcation point, we discuss the discrete version of the integro-differential equation, and use the approximation parameter as the initial value of the Newton iteration method.

为了得到Hopf参数的精确值，进一步讨论了延迟积分－微分方程的离散形式，利用Newton迭代法，得到了参数的逼近值。

Firstly, we discuss the boundary value problem of one dimensional biharmonic equation in an interval and its variational problem,multiresolution analysis in the Sobolev space , then solve it with wavelet-Galerkin methods.

首先本文讨论了一维双调和方程边值问题及其相应的变分问题，定义Sobolev空间的多分辨分析，用小波–伽辽金方法进行数值求解，两组基下得到的系数矩阵为七对角阵和块状对角阵。

Secondly, we discuss the boundary value problem of two dimensional biharmonic equation in a rectangular field and its variational problem,discretize it by using dual tensor product of and the direct product and lining up of matrices, we get some special matrices which are the presupposition in exploring the fast computation, then solve the system of linear equations.

其次本文讨论了矩形域上二维双调和方程边值问题及其相应的变分问题，利用二元张量积小波分析和矩阵的直积、拉直技巧将变分问题离散化，从而使求解偏微分方程问题变为求解线性方程组的问题。一维情况两组基的张量积下得到的系数矩阵分别为块状七对角阵和稀疏矩阵。这些特殊结构为以后快速算法的研究打下一个基础。

Objective To discuss the clinic application of serum total bile acid level in intrahepatic chiletasis of pregnancy.

目的 探讨血清总胆汁酸水平对妊娠期肝内胆汁淤积症的诊断价值。

objective to discuss the diagnostic value of ultrasonography to the diseases of common bile duct.

目的：探讨超声检查对胆总管疾病的诊断价值。

AIM: To discuss the preoperative evaluation and management of bile duct re-operation.

摘要目的：探讨胆道再次手术的术前评估及处理。

Objective To discuss the value of ERCP in treatment for patients with bile duct obstruction.

目的 探讨经内镜逆行胰胆管造影术在外科胆道梗阻性疾病治疗中的价值。

Objective To discuss the selection of the treatment of elderly biliary tract benign disease.

目的 探讨老年胆道良性疾病的治疗方式选择。

Objective To discuss the diagnosis and management of biliary tract stone.

目的 总结胆道结石合并胆道感染的诊治经验。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。