查询词典 impression drawing

Drawing Drawing is used primarily to add new objects to the model or to modify objects one-at-a-time.

绘图 绘图是被用来在针对一个模型添加新对象或修改已有对象的操作。

In addition, the blank holding force that is required to avoid wrinkle and rupture during conical part deep drawing is researched. The necessity of reasonable blank holding force in pressing is expounded. From the view of mechanical analysis, the wrinkle critical condition of side-wall is derived for the first time by the stress state of side-wall, the main deformation region on blank. According to the critical condition of plastic instability for flange, side--wall, corner of punch on blank, The blank holding force in conical part deep drawing is divided into four different regions within its forming figure. The basic principle of reasonable blank holding force during stamping is summarized and provided. The mathematical model of reasonable blank holding force that avoids the wrinkle and rupture is established and verified by the finite element numerical simulation and the grid experiment method. The result shows that it is accurate and reliable.

此外，本文还研究了圆锥形件拉深成形过程中，随着拉深变形过程的进行，毛坯为避免产生起皱、破坏缺陷而对压边力的需求情况，阐明了圆锥形件拉深成形过程中压边力合理变化的必要性；由毛坯主要变形区悬空锥壁部分的受力变形情况，从力学分析的角度，首次推导得出了圆锥形零件悬空锥壁起皱失稳的临界条件；并根据主要变形区法兰、悬空锥壁及凸模圆角部分的塑性失稳临界条件，在其成形范围图中，将圆锥形件成形过程中的压边力划分为四个区域；总结并提出了圆锥形件成形过程中压边力合理变化的基本原则；建立了防止起皱、破坏缺陷产生的压边力合理变化的数学模式，并得到了有限元数值模拟及网格实验法的验证，证实了理论分析结果的正确性和可靠性。

Draughtsmen make drawing on a drawing board , using a pencil and a T-square, set square and scale

绘图员用铅笔、丁字尺、三角板和比例尺在绘图板上绘图。

The concept and method of adding a projection plane to AUTO CAD drawing-board and drawing non-Euclidean geometry graph on the board are discussed. The correlative application software is programmed. The analysis of the working angle of complicate shows that developing the new type cutters are rapidly and accurately with this software.

提出了将射影平面叠加到AUTO CAD绘图板上并进行电子非欧几何作图的思想和方法；编制了相关的实用程序；通过对一复杂刀具的工作角度解析结果表明，用该软件分析刀具角度，开发新型刀具可达到即快又准的效果。

So, that's the 1st impression about this country.

这是我在这个国家的第一印象。

My first impression? Honestly, it's just a hideous little building to me with a rough entrance covered in a sea of cigarette buds......... Old, smelly, dirty.... your name it......

当我到达中心的正门，眼前看到的，竟是一所细小又破落的建筑物，门前还被一大片的烟头覆盖，整个环境就是残旧和肮脏，还弥漫著臭味。。。。。。。。。。。。。

Before the birth of Deconstructionism, all architecture schools of thoughts are on rational creation. However, Deconstruction is totally irrational, it claims the separation of architecture, including the separation of the themes and the concept of unification. It proposes questions to all systems. In general forms, it emphasizes fragments, superposition, aberration and superimposing, but is against harmony; it emphasizes abiogenesis and process of the design, but is against following first impression; it emphasizes separation and conflict, but is against integration.

在此之前的建筑流派基本上是以理性思维进行创作的，而它则完全是非理性的，主张建筑的分离，包括主题的分散和对统一整体观念进行分散，他们对一切秩序提出质疑，大形态构成上他们强调片断、叠置、畸变和迭加，反对协调，强调设计的偶发性和过程性，反对先入为主，强调分裂和冲突，反对合成。

For the all classes of dies, if we analyse the fluctuate, tendency of increase and decrease and law which appeared in the die's whole life, we will find that the master of the error are changeless; the error that because the abrade of the cutter and impression will be as the cutter grinding times increased at the same time.

新冲模在指定的冲压设备上投入使用至失效报废的整个寿命过程中，其合格冲件误差的主导部分固定不变即所谓固定误差。其大小就是新冲模第一次刃磨前冲制的合格冲件的偏差，也即冲模的初始误差，而此时的冲模具有初始冲压精度。

For the all classes of dies, if we analyse the fluctuate, tendency of increase and decrease and law which appeared in the die's whole life, we will find that the master of the error are changeless; the error that because the abrade of the cutter and impression will be as the cutter grinding times increased at the same time. And that will cause the error oversize gradually; and also have another part error are unconventional , unforeseen.

对各类冲模冲件误差在冲模整个寿命中出现的波动、增减趋向及规律等进行全面分析便可发现：冲件误差的主导部分是不变的；因刃口或型腔的自然磨损而出现的误差增量随冲模刃磨冲数增加而使这部分误差逐渐加大；还有部分误差的增量是非常规的、不可预见的。

Higher algebra is an abstract and theoretical subject.In the teaching,it is hard to join the examples with the real life.This gives people the impression that learning algebra is not useful.

高等代数是一门抽象性和理论性较强的学科，在教学中所涉及的例子较少能与实际生活密切相连，让人感觉到学习的内容与生产实践脱节，体现不了数学的应用价值。

Molecular Distillation is a kind of high vacuum distillation method, which is suitable for the separation of high boiling, heat sensitivity and viscidity products.

分子蒸馏技术是一种在高真空条件下进行的连续蒸馏过程，适合于分离高沸点、热敏性及具有生物活性的混合物。

They are to the Noughties what yuppies were to the Eighties .

那在六十年代是时髦的，但在八十年代肯定是过时了