Existing 3-D printers, also called rapid prototyping machines, build structures layer by layer.
已有的三维打印机也被称做快速成型机，可以一层一层地构建出结构。
A numerical method for the lower bound limit analysis of 3-d structures under multi-loading systems is presented.
本文提出了多组载荷作用下三维结构下限分析的数值方法。
A mixed FE-BE method is used to analyze fluid-structure coupling free vibrations of 3-d structures in an infinite liquid with constant depth.
应用有限元-边界元混合法分析了等深度的无限大片状域流场中三维结构的自由耦振问题。
The means for doing so were found in a special moldable agarose gel, dubbed 3-D Petri dishes, that encourage cells to grow into certain shapes and structures.
他们发现专用的可塑琼脂糖胶（被称为3-D培养皿）就能刺激细胞，使之发育成特定的形状和结构。
The equivalent time method (ETM) for approximate calculation of the transient temperatures displacements and thermal stresses in 3-d structures is proposed in this paper.
本文提出了一种计算三维结构瞬态温度、位移和热应力的近似方法——等效时间法。
To reproduce the landscape in 3-D, a twin-engine plane flew over the city and fired laser beams through the dense tree canopy. The beams bounced off the ground, buildings, and other structures below.
为了在3 - D模型中重现，一架双引擎飞机飞越城市和浓密的树冠，发射并采集从地面，建筑物和其他结构反射回来的激光束。
Under these conditions, the cells will aggregate to form 3-d tissue-like structures.
在这个情况下，细胞能够聚集在一起形成一个三维结构。
Data binding won't allow you to perform complex mathematical formulae, create amazing 3-d graphics, or diagram cellular structures.
数据绑定不能执行复杂的数学公式、创建眩目的三维图像或者图表结构。
The view that competitive market structure is most helpful to motivate R&D is verified by this paper by comparing different market structures without R&D rivalry.
在无专利竞赛下，通过对不同市场结构下企业R& D动力的比较，本文认为竞争性市场结构有利于激励企业的技术创新。
The electronic structures of 10 kinds of D-form and L-form amino acids have been investigated by employing AM1 semiempirical quantum chemical method firstly.
首次采用AM1半经验量子化学计算方法研究了10种D型和L型氨基酸的电子结构。
D seismic prospecting is more and mo re extensively used in many aspectss uch as small faults , small structures and collapse column in mining areas of coal mine.
三维地震勘探在解决诸如小断层、小构造、煤矿采区陷落柱等方面的应用日益广泛。
Nonnatural amino acid 3 (4 thiazolyl) D, L alanine hydrochloride and its four intermediates were synthesized, their structures were detenmined by IR, NMR, elementary analysis and melting point.
合成了非天然氨基酸3- （4 -噻唑基） -D，L-丙氨酸盐酸盐以及三个中间体，其结构分别通过红外光谱、核磁共振、元素分析、熔点等测试手段得到确证。
Methods 49 patients with venous valvular insufficiency were examined using 2-D color Doppler flow imaging to observe the anatomic structures of valves and hemodynamics of venous flow in legs.
方法应用二维彩色多普勒血流显像检查下肢静脉瓣功能不全49例，观察下肢静脉血管及瓣膜的解剖结构和血流动力学的改变。
The 3-D numerical prediction proved that the copper pin fin structures have 24%-34% higher convection heat transfer coefficients with 10%-16% pressure drop increase.
在三维空间上的对流换热模拟表明，铜制的针肋结构的换热系数要高出百叶窗翅片24％-34％，而流阻仅高出10％-16％。
The ECL OR-AND-gate can simplify a generalized ECL circuits structures, for example, an ECL double-edge-triggered D flip-flop.
作为常规ECL门的补充类型，常可用于简化一般ECL电路结构，例如ECL双边沿D触发器。
The analyses of the scattering characteristics of some 3-D dis-continuity problems in guided wave structures verify the effective and reliability of the present method.
用这种方法对导波结构三维不连续性散射问题的分析，证实了它的有效性和可靠性。
The evolution of coherent structures in a 2-D time-developing mixing layer of the Oldroyd-B fluids are examined numerically.
混合层是一种在化工过程中经常见到的基本流场，对该流场拟序结构的研究具有理论和实际意义。
Combined with the topographic and physiognomic maps of natural terrains, a 3-D model which generates the geometrical structures of complex terrain, has been developed.
结合自然地表的地形地貌图，建立了复杂自然地表三维几何结构生成模型。
Two computationally efficient state-space structures for general 2-D digital systems described by Roesser's local state-space model are presented.
本文给出了一般二维数字系统的两种高效率状态空间结构；
The fan has a good aerodynamic performance, smooth operation, high efficiency, long life characteristics, a total of A, B, C, D four kinds of structures.
该风机具有良好的气动性能、运转平稳、振动小、效率高、寿命长等特点，共有A、B、C、D四种结构。
The compact 4-component 2-D finite-difference frequency-domain algorithm (2-D CFDFD) is one of the effective methods to calculate the propagation properties of ideal guided wave structures.
四分量紧凑格式二维频域有限差分（2-DCFDFD）算法，是求解理想导波结构传输特性的有效方法之一。
D., it is now supported by steel cables and concrete structures.
现在的桥为钢索混凝土桩。
Five triterpenoids were isolated and their structures were identified to be cauloside C (1), akebiasaponin D (2), akebiasaponin F (3), ursolic acid (4) and hederagenin (5).
分离鉴定了5个三萜类化合物：葳岩仙皂苷C（1）、木通皂苷D（2）、木通皂苷F（3）、 熊果酸（4）和常春藤皂苷元（5）。
In order to connect and fix all kinds of structures, there are usually a lot of threaded joints in the 2-d woven composite structures.
为了联接和固定各种结构，经常需要在二维编织复合材料结构上采用大量的螺纹联接。
Results 2-d and color Doppler ultrasound reflected SSOL structures and blood supply status clearly. The detective rate of SSOL on ultrasound was very high.
结果二维和彩色多普勒超声可以显示脾脏占位性病变的结构特征及血供状态，具有检出率高等特点。
Based on inverse method for supercritical flow control, this paper gives a direct computational method, for flows in 3-d controlling structures.
本文在急流控制逆命题的研究基础上，首次探讨性地提出了三维控制急流的正命题解法。
This paper describes the principle of a 3-d CNC system and the structures of software and hardware.
本文介绍高精度三座标联动cnc系统的原理及软、硬件组成。
This paper describes the principle of a 3-d CNC system and the structures of software and hardware.
本文介绍高精度三座标联动cnc系统的原理及软、硬件组成。
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