查询词典 piecewise linear element

Chapter 4 puts up the basic theory of non-linear finite element calculation methods and deduces calculation iterative formula and relevant accelerating iterative format. In the calculation of non-linear finite element, yielding element calculation is a difficult problem,"fictitious elastic stress" methods propounded in this paper puts the axe in the helve.

第四章提出了非线性随机有限元法的基本理论，并推导了计算迭代公式，为加快计算速度，提出了相应的加速迭代格式，对于基于非线性随机有限元的可靠度计算中，屈服单元的计算方法是一个难题，本文提出了"虚拟弹性应力"法，较好的解决这个难点。

It comprises a chassis, a bell cap, a begrime element and disperse oar. Wherein, said bell cap is mounted above the begrime element via the support element; the begrime element is mounted on the chassis which comprises a inner screen component, a outer screen component, a cover board and a chassis to form the annular space structure; stuffing or protective agent can be filled into annular space according to the demand; the inner cylinder formed by inner screen component is in the hollow cylinder structure; the part of chassis relative to the inner cylinder of inner screen component is on the open structure under which the disperse oar is mounted via the connection element.

包括底盘、泡帽、积垢部件和分散桨，泡帽通过支撑件固定在积垢部件上方，积垢部件固定在底盘上，其结构是内筛组件、外筛组件、盖板和底盘构成的环隙结构，环隙内根据需要使用填料或保护剂，内筛组件构成的内筒是空筒结构，底盘与内筛组件内筒对应部分为开口结构，开口结构下方是通过连接件固定的分散桨。

The energy-orthogonal character of Wilson element,Q_1 element,rotated Q_2 element,Bergan 9-parameter triangular element[6],5- parameter[23] and 8-parameter rectangular element[20] is analysed in this paper.

全文提供：购买充值卡，就可下载本篇论文全文中文摘要：本文分析了Wilson元，Q_1元，旋转Q_1元，Bergan 9参三角形元[6]，5节点元[23]和8参数矩形元[20]的能量正交性。

The coordinate transformation and numerical integration was executed on the discretized tetrahedral elements based on which the 3-D MT vector-finite element method was implemented. A whole computation framework for 3-D vector-finite element method with unstructured mesh was given. Based on this some typical models were tested which has demonstrated that our algorithm could distinctively avoid problems caused by the fake solution and both the accuracy and efficiency were enhanced which made our algorithm has a bright future for further application.3. According to theory of Sobolev vector space and the discretization of Helmholtz space, the error estimate which was suitable for 3-D MT vector-finite element modeling was deduced by which the procedure of adaptive technique was guaranteed.4. Based on the fully unstructured tetrahedralization and optical strategy, the 3-D magnetotelluric h-adaptive vector-finite element method was presented through combining the error estimate. With this work, the accuracy and creditableness for 3-D MT complicatedly modeling was guaranteed.5. The 3-D magnetotelluric h-adaptive vector-finite element algorithm with unstructured mesh was implemented.

针对非结构化的四面体单元，采用坐标变换和数值积分方法，实现了MT三维矢量有限单元分析，建立起基于非结构化网格的三维MT矢量有限元计算流程，并对典型模型和国际标准电磁模型进行了数值模拟，结果对比和分析表明，基于非结构化网格的三维MT矢量有限元不仅消除了节点型有限元的伪解，而且具有很高的计算精度和速度，有广阔的应用前景。3、根据Sobolev函数的向量空间和Hemlholtz空间的分解，推导出基于残差的三维大地电磁矢量有限元后验误差估计公式，为三维大地电磁自适应矢量有限元数值模拟的实现奠定了基础。4、在完全非结构化四面体单元剖分及优化基础上，结合三维大地电磁矢量有限元后验误差估计公式，提出了基于非结构化网格的三维大地电磁h-型自适应矢量有限元计算策略，保证了对复杂大地电磁模型数值计算的精度和可靠性。5、实现了基于非结构化网格的三维大地电磁h-型自适应矢量有限元计算流程，对典型模型和国际标准电磁模型进行了数值模拟。

Based on the prior information obtained by qualitative inversion, the two stages inversion method was put forward. That is, the first stage is that distinguishing the high-quality element and non- high-quality element, and determining the initial iteration value of element sound velocity reasonably. The second stage is that treating differentially the constraint weights of the high-quality element and non- high-quality element, and then quantitatively inversing the final sound velocity distribution. The results of two concrete specimens indicate that the two stages inversion method can inhibit artifacts effectively and has better defect identification effect than normal one stage inversion.

在获取定性反演先验信息的基础上，提出了两阶段反演的方法：第一阶段，区分优质像元和非优质像元，合理确定像元声速的迭代初值；第二阶段，区别对待优质像元和非优质像元的约束权重，定量反演最终的速度分布。2个混凝土试件的模型试验表明，两阶段反演能有效抑制伪像，具有比常规的一阶段反演更好的缺陷识别效果。

Based on the profound analysis of cable element and derivation of finite element method, measure of cable element affected by self-weight is put forward after the discussion of the affecting factors of self-weight. Taking full advantage of the UPFs development technology of Ansys, the user-element is developed and the procedure of implementation and technology of development is discussed seriously. And it is helpful to the redevelopment of other similar element.

基于对索单元的深入分析和有限元理论推导，并在对自重的影响因素进行了详细探讨后，提出了考虑自重影响的索单元开发的思路；充分利用基于Ansys的UPFs二次开发技术，开发用户索单元，并深入探讨了实现过程及开发技术，对类似的其它单元的开发有一定的参考价值。

Steps includes: first revise the comprehensive efficiency index of element awaiting assignment, then find out t he most allocation element of comprehensive efficiency index after revising, while appoint the assignment element appearance is shooting; as to the element awaiting assignment, which has sparking conflict with the forenamed element, appoint its appearance is fireless.

基于循环排序法的弹炮混编防空兵群火力分配优化，先对所有待分配元的综合效率指标进行修正，再找出修正后综合效率指标最大的分配元，指定该分配元状态为射击，并指定与其有转火矛盾的待分配元状态为不射击。

Steps includes: first revise the comprehensive efficiency index of element awaiting assignment, then find out the most allocation element of comprehensive efficiency index after revising, while appoint the assignment element appearance is shooting; as to the element awaiting assignment, which has sparking conflict with the forenamed element, appoint its appearance is fireless.

基于循环排序法的弹炮混编防空兵群火力分配优化，先对所有待分配元的综合效率指标进行修正，再找出修正后综合效率指标最大的分配元，指定该分配元状态为射击，并指定与其有转火矛盾的待分配元状态为不射击。

Finite element discretization was carried out on the mathematical model to get a fully coupled finite element equation with the parameters of element nodal displacement and element nodal pore pressure as unknown variables. Finally, the transient nonlinear finite element equation in incremental form for reservoir fluid-solid coupling is obtained by means of time discretization in implicit difference scheme.

基于与微分方程等价的加权余量公式，在空间域采用有限元离散，对时间域进行隐式差分格式离散，导出了以单元节点位移和单元节点孔隙压力为未知量的储层流固耦合的非线性有限元增量方程。

Longitudinal reinforcement has been modeled with discrete element and stirrup has been modeled with smeared element. Smeared element, stirrup has been modeled using membrane element in or on concrete isoperimetric element. The constitutive relationship and failure criterion for concrete is the inter-facial model.

在建立钢筋混凝土的有限元模型时，混凝土采用的单元为八节点六面体等参单元，钢筋单元分为两种情况，纵向钢筋采用分离式钢筋单元，箍筋采用埋藏式钢筋单元，即箍筋作为附着在混凝土等参数单元内或单元上的"膜单元"。

As a dominant party,CPC government should play a guardian,supervisee and guarantee role to overcome all the difficulties in the development of charitable cause and bring it into full play in the establishment of harmonious society on policies and regulations basis.

在中国共产党的文献中第一次把发展慈善事业提到&最广泛最充分地调动一切积极因素，不断提高构建社会主义和谐社会的能力&的高度来认识。近年来，社会学界对慈善事业的理论专著发表较多，有鉴于此，笔者不揣浅陋，谈谈自己的认识和见解。

Flow through the land, the land of the scale of operation allows the effectiveness of the land may be raised.

通过土地的流转，土地的规模经营可以让土地的效益得到提升。