However, when the underlying lower-dimensional manifold is self-intersecting at some points, it's difficult to obtain local lower-dimensional structure from the Euclidean neighborhoods.
然而，当高维数据所逼近或近似的一个低维流形自相交时，欧氏距离意义上的邻域不能完全反映低维点的相邻关系，往往难以体现真实的局部线性结构。
The results showed moisture adsorption of the platen dried veneer was lower and its dimensional stability was better, but its impact strength dropped when pressing temperature was too high.
研究结果表明：高温热压后的板材吸湿性降低，尺寸稳定性好，但热压温度过高会产生木材热分解，冲击强度略有降低。
The results showed that the modified nylon 66 cord had higher tenacity and tenacity retention, but somewhat lower dimensional stability when compared to HMLS polyester cord;
结果表明，与高模量低收缩聚酯帘布相比，改性锦纶66帘布的强力及强力保持率高，但尺寸稳定性稍差；
Powder bed temperature of sintering process should be lower than agglomeration temperature of composite wax powder, which result in dimensional instability.
为了使蜡模获得稳定的尺寸，烧结过程中的粉床温度应尽量低于蜡粉材料的板结温度。
The dimensional stability of homemade polyimide film is far lower than that of overseas electro-thermal film. Improvement should be on the chemical structure, manufacturing technique and equipment.
国产聚酰亚胺薄膜的尺寸稳定性远低于国外电子膜，树脂的化学结构、生产工艺和生产设备都有待改进。
Compared with traditional stereo vision, rotational stereo takes advantages of lower cost, less calibration and being easy to reconstruct entire three-dimensional objects.
相对于传统立体视觉，旋转立体视觉具有标定次数少、成本低、易于对物体实现整体重建等优点。
A generalized KAM theorem for lower dimensional tori in Hamiltonian systems is obtained, which applies to the case where there are normal frequencies and hyperbolic normal components simultaneously.
本文给出了关于哈密顿系统低维环面的一个推广的KAM定理，它适用于同时存在法向频率和双曲法向分量的情况。
Objective: To explore the applications of two dimensional color Doppler imaging (2d CDFI) in diagnosing deep venous thrombosis (DVT) in lower limbs.
目的：探讨二维及彩色多谱勒超声(2dCDFI)在下肢深静脉血栓(DVT)诊断中的应用。
Transonic tube wind tunnel flows over supercritical airfoils with slots on both upper and lower walls have been simulated by using compressible unsteady two dimensional Navier-Stokes equations.
本文采用二维可压缩非定常N-S方程模拟了带有上下开槽壁的跨声速二维管风洞中超临界翼型绕流的流场。
The energy of the desired user may lie on a lower dimensional subspace, so the detection can be constrained on a reduced-rank subspace.
又由于期望用户的能量可能位于信号子空间的某一子空间，所以将检测器限制在降秩子空间上是可行的。
The higher dimensional linear complementary problem is transformed into quadratic (programming), and then decomposed into a series of lower dimensional quadratic programming.
把高维线性互补问题转化为与之等价的高维二次规划问题，然后把高维二次规划问题分解为一系列低维二次规划问题。
Lower dimensional AFH models show some novel properties such as quasi-long-range-order, spin gap, quantum phase transition, etc.
由于低维体系中有很强的量子涨落，使这些体系呈现出许多新奇的特性，如会有自旋准长程序、自旋能隙、量子相变等现象。
The current work examined the shift of spatial attention between the upper and lower visual fields and whether the attentional shift is influenced by perceived three-dimensional space.
本实验研究空间选择性注意在上下视野间的转移及其是否受知觉空间的影响。
The results in 3 and lower dimensional space are generally discussed in the literature, and the generalized result in arbitrary dimensional space is obtained.
文献上一般只讨论了到3维以及更低维空间的结果，作者推广得到了任意维的结果。
Objective To evaluate the application of two dimensional ultrasonography and CDFI in the preoperative diagnosis of deep venous valvular insufficiency of lower extremities.
目的探讨二维超声及彩色多普勒血流显像(CDFI)技术在术前诊断下肢静脉瓣膜功能不全的应用价值。
The comparison results show that, compared with multi-dimensional separable FFT, the DIF multi-dimensional vector radix FFT algorithm has lower calculation load.
计算量比较结果显示，频域抽取多维向量基FFT算法比多维分离式FFT算法计算量低。
Methods Six models with different lower jaw shapes were constructed by using three dimensional finite element method.
方法采用三维有限元法 ，根据下颌骨测量资料建立不同颌骨截面形态的种植修复模型并进行分析。
Methods Six models with different lower jaw shapes were constructed by using three dimensional finite element method.
方法采用三维有限元法 ，根据下颌骨测量资料建立不同颌骨截面形态的种植修复模型并进行分析。
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