查询词典 meshes

3D-CTM (Coupled Thermo-Mechanical Forming Simulation) software for precision forging process of aero-engine blade was developed. The key technologies of 3D coupled rigid-viscoplastic thermo-mechanical FEM simulation of blade forging process were studied systematically. By using the remeshing method of contracting from the boundary to the inner, new mesh system from old distorted mesh system can be obtained. A method of modifying the position of nodes touching on the die according to its original normal was proposed to avoid "dead lock" problem due to uncontinuity of normal of scatted die meshes. The pseudo-static iterative algorithm was used to simplify the coupled thermo-mechanical computation. In particular, formulations to determine relaxation factor β was established for rigid viscoplastic FEM adopting penalty function method, and an improved cubic factor rapid algorithm derived from these formulations was proposed by combining with the advantage of advance and retreat search method.

采用基于边界构形的内缩法，实现了三维畸变网格的重新划分；提出了初矢修正法对触模节点的位置进行修正，解决了由于离散的模具网格的法矢不连续造成的&死锁&问题；采用准静态迭代法简化了速度场和温度场耦合计算过程；特别是针对减速因子β的选取，建立了适用于三维复杂成形过程刚粘塑性罚函数法有限元三次因子法的计算公式，并结合进退搜索法提出了改进的三次因子快速算法，提高了模拟计算效率和稳定性，在此基础之上，开发了面向叶片精锻过程的三维刚粘塑性热力耦合有限元模拟分析系统(3D-CTM)，系统的可靠性得到了圆柱体镦粗的验证。

The optimum extraction method of amino acid was as follows: the samples were sieved by 60 meshes treatment and treated by ultrasonic extraction with 0.005 mol/L hydrochloride for 30 min.

最优的氨基酸提取方法是：样品过60目筛，用0.005mol/L的盐酸超声萃取30min。

In addition to Netlon sleeving, Netlon meshes offer a variety of solutions for industrial packaging.

除了奈特龙套管，奈特龙网提供的各种工业包装解决方案。

The result indicated that, the optimum parameters of organic solvent extraction pepper oil are acetone to organic solvent, chili powder fineness of 40 meshes, solid-liquid ratio of 1∶6, the extraction time is 40 min.

结果表明，制备辣椒油树脂的最佳工艺条件为：丙酮作有机溶剂，辣椒粉末细度为40目，固液比为1∶6，浸提时间40min；辣椒油树脂提纯辣椒红色素的超临界萃取条件为：萃取釜温度35℃，萃取压力30MPa，时间2.0h。

This company mainly produces stainless steel wire mesh, welded wire mesh, wire mesh, Crimped Wire Mesh, hexagonal wire mesh, black wire cloth, steel nets, round hole net, chain link fence, fencing wire mesh, copper wire cloth, wire meshes, mining screen mesh, the carrier network belt, such as galvanized wire mesh products.

本公司主要生产不锈钢网、电焊网、窗纱、轧花网、六角网、黑丝布、钢板网、圆孔网、勾花网、护栏网、铜丝布、烧烤网、矿筛网、输送网带、镀锌丝等丝网产品。

The solid modeling based on STL dare mesh instead of the one based on surface is created to increase morphological comparability. Topological relationship among polygons is reconstructed to modify and Boolean operation. Periodontal ligament, supporting bone and glass fibers are reasonably predigested and constructed in CAD system to reduce the amount of mesh. FEA meshes are generated through splitting method to improve quality of mesh.

本文以基于STL数据的网格实体建模代替传统的曲面实体建模，提高了模型的几何相似性；重建三角面片间的拓扑关系，便于了模型的更改及布尔运算；牙周组织与纤维的正向设计及其合理简化，降低了工作量，减少了网格数量；基于STL数据拆分法的有限元网格划分，提高了单元质量。

Experimental results show that: SFE-CO2 is the best, and the optimum technological condition of extracting oil from celery seeds was defined: particle size 60 meshes, temperature 45℃, working pressure 20 MPa, CO2 flow 15 L/h, operating time 2 h.

结果表明：超临界萃取优于常规方法，并确定了超临界CO2萃取芹菜籽精油的最佳工艺条件为：原料粒度60目，温度45℃，压力20 MPa，流量15L/h，萃取时间2h。

Royal Ro i , author of Basic Rockcraft writes,"When buying a carabiner, check to make sure the ring action is smooth but not too strong, that the gate meshes freely, that there are no burrs, and that they are strong."

攀岩技术要素》的作者罗亚尔·罗宾斯在书中写道：&在购买铁锁时，一定要保证弹簧的弹力正常，但强度不能太大。开口能够正常开闭。不能有损伤的刻边。而且必须很牢固。&

As feature extraction acts an important role in pattern recognition system, we propose three novel feature extraction methods for HCCR: a、Two structural feature extraction methods, Stroke Cross Counting Features and Peripheral Features are studied. According to the characteristics of Chinese handwriting samples, we extend the SCCF and PF respectively to weighted elastic SCCF and weighted elastic PF. Experiments show that the modified feature extraction approaches are better than original approaches. b、A new statistical feature extraction method——Elastic Meshing Directional Decomposition Feature extraction is proposed. According to the stroke statistical properties of Chinese character, we first decompose a handwritten character pattern into four directional subpatterns. Then a set of elastic meshes are applied to each of the four subpatterns respectively to extract the pixel distribution features.

统计识别方法：利用统计模式识别的经典方法——Bayes分类方法来进行汉字识别的研究，特征提取是统计模式识别的关键，本文着重围绕手写体汉字的特征分析和提取方法进行了研究，提出了三种特征提取的新方法： a、两种改进的结构特征提取方法：在笔划密度特征和外围特征的基础上，结合手写体汉字的特点，提出了加权非均匀笔划密度特征、加权非均匀外围特征的特征提取新方案； b、一种新的统计特征提取方法——弹性网格方向分解特征，根据汉字方块字的特点及笔划分布的统计特征，对手写体汉字进行横竖撇捺四方向的分解，并利用一系列的弹性网格对汉字分解后各分量的象素进行统计而提取特征，实验证明该特征提取方法用来进行手写体汉字识别是十分可行和有效的。

To check the accuracy of calculation, based on the global one, the meshes of the 19th to 21st dam blocks are locally densified. The results from the locally densified mesh are compared with that from the global one. The coincidence of the two results demonstrates the adequacy of accuracy of the global mesh.

为验证大坝整体有限元网格的计算精度，在大坝整体有限元网格的基础上，局部进行了有限元网格的细分，粗细网格的计算结果得到较好的吻合，证明整体网格精度是足够的。

In the United States, chronic alcoholism and hepatitis C are the most common ones.

在美国，慢性酒精中毒，肝炎是最常见的。

If you have any questions, you can contact me anytime.

如果有任何问题，你可以随时联系我。