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These kinds of analytical elements can describe the crack tip fields for the Dugdale model and can also be combined with the ordinate finite elements to form the semi-analytical finite element method.

该类超级单元能够准确地描述基于Dugdale模型的裂纹尖端场，可与普通有限单元相结合，构成半解析有限元法。

Extended the semi-analytical finite element method into the Dugdale model of elastic-plastic fracture mechanics, the analytical elements based on the Dugdale model of mode Ⅰ and mode Ⅱ crack are constructed. The formulas for the stiffness matrices and load vectors of analytical elements are deduced.

将上面的半解析有限元法应用于弹塑性断裂力学中的Dugdale模型，分别构造了基于Ⅰ型和Ⅱ型Dugdale模型的裂纹解析元，并建立了解析单元的出口刚度阵和荷载向量的列式。

The dissertation presents a mathematical modeling approach for the high-speed flexible linkage mechanisms equipped with bonded piezoelectric sensing/actuating elements employing a mixed variational approach with Hamilton's principle in conjunction with the finite element formulation. This model includes both the terms coupling the elastic and rigid-body motions of linkage mechanisms and the terms coupling the elastodynamics and piezoelectricity of the elements, incorporating their effects upon the mass and stiffness matrices which are in general non-symmetric.

本文以国家自然科学基金资助项目《弹性连杆机构有害振动的主、被动控制及混合控制研究》（资助号：59605001）和广东省自然科学基金项目《开链及闭链机构有害振动控制研究》（资助号：970381）为依托，对高速弹性连杆机构振动的主动控制中的建模、求解、控制律的选择、作动/传感元件的优化以及实验研究等几个关键问题进行了比较深入细致的研究，取得了一些具有重要理论意义和重大实际应用价值的成果。

To improve temperature uniformity,trolley electric furnace heated by three districts, in accordance with temperature arrangement method arrange heating elements, compensation for loss of furnace heat mouth, I District II District III district heating elements layout of the different, but the car high-precision temperature furnace heating and insulation in the process of maintaining three districts temperature consistent.

可为用户定做各种规格尺寸高精度高温台车电炉。为提高炉温均匀性，台车电炉采用三区加热，并按均温布丝法布置加热元件，为补偿炉口热损失，I区II区III区加热元件布置范围各不相同，但使高精度高温台车电炉在升温及保温过程中保持三区均温一致。

Carbon lies midway in the periodic chart between the strongly electropositive elements of group I-A and the strongly electronegative elements of group VII-B.

碳在元素周期表上位于I-A族强正电性元素和VII-B族强负电性元素之间。

Changzhou Lucheng Nanyang Electric Appliance Plant is an enterprise specializing in production of electrothermal elements and temperature control elements.

常州市戚墅堰区潞城南洋电热管厂是专业生产各种管状电热元件及配套的温度控制元件的企业。

Is welcomed buying the house , the first key elements is section of an area , second key elements are section of an area , third key element are still section of an area.

值得注意的是，表2和表3中职业所处的位置是动态而非静态的。如煤炭业，今年的表现就不俗，各项指标上涨幅度喜人。

The flora has the characteristics of both old and new elements, complicated differentiation, young elements mainly,obvious substitution and endemism phenomena. It is the center of alpine flowers and current diversified pine and cypress plants.

为主；替代现象明显、特有现象显著；与北温带联系紧密，高山花卉和现代松柏类植物多样化中心；是中国低纬度高海拔地区植物资源保存比较完整而原始的地区。

The contents of nine trace elements and constant elements in Erigeron BreviscapusHand.

目的研究中药灯盏花中总黄酮及微量元素的含量，为治疗心脑血管疾病的机理提供科学的依据。

You very eugenic awareness should really fill in advance, because any trace elements are not able to fill the entry into force of a body will take some time to accumulate, especially the Chinese people from the dietary intake of trace elements is low.

你很有优生意识，确实应该提前补，因为任何微量元素都不是一补就能生效的，人体需要一段时间来进行积累，特别是中国人从膳食中摄取微量元素的比例很低。

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％。