查询词典 tensor density

Results: In 6 patients the relationship of Broccas area and precentral motor area to the frontal lobe tumor was identified allowing pre-operative neurosurgical planning to minimize language and motor disruption. Diffusion tensor images were corrupted by motion in one patient but successfully demonstrate the impact of tumor on white matter tracts in 5 patients. Fractional anisotropy images, showed disruption of the left arcuate fasciculus in one patient, deviation/deformation in 2 cases and unaffected by tumor in the remaining two cases.

因刺激任务为按键反应模式，5例肿瘤患者双侧均可见初级运动皮质(M1)和辅助运动区的激活，1例因右侧肢体瘫痪而只显示右侧M1的激活。1例患者在DTI扫描过程中头动明显而失败，5例肿瘤患者FA图显示良好，纤维束重建后1例可见弓状束的浸润破坏，2例伴有弓状束变形及移位，2例弓状束未见破坏或移位。

The raw data was processed by using axial, coronal and double oblique multi-planar reformation; Images obtained were graded in terms of quality with a 5-point scale(5=excellent, 4=good, 3=fair, 2=poor, and 1=nondiagnostic). In grading image quality at axial MPR, The radiologic specialists focused on the subarcuate fossa, tendon of tensor tympani, facial recess, vestibular aqueduct and pyramidal eminence, In grading image quality at coronal MPR, attention was given to the scute, crista transversa, fenestra cochleae, lateral malleal ligament and snake eyes signature of cranial nerve, In the grading of the image quality at double oblique MPR, the radiologic specialists concentrated on the malleus, incus, stirrup bone, upper bony semicircular and aquaeductus fallopii, and then to implement statistical analysis. In order to choose the minimum tube current values and the maximum pitch that can satisfy the diagnosis request, image quality of axial, coronal and double oblique reformation images was compared with different tube current groups. 15 ears of volunteers were used to test the validity with the scanning parameter. Subsequently noise, MTF and dose length product were measured by phantoms in different tube current and pitch, the parameters obtained were compared and taken into statistics analysis.

扫描模式使用临床常用的颞骨螺旋扫描方式：管电压120 kV，准直宽度20×0.6 mm，视野200 mm，重建矩阵512×512，旋转时间1 s/r，重建层厚0.6 mm，重建间隔0.3 mm，分别改变管电流(380、300、200、160、120和80 mA)和螺距(0.8、1.0和1.2)进行扫描和重建，然后对颞骨进行横断面、冠状面和双斜面多平面重组，于重组后的横断层面图像上选取弓形下窝、鼓膜张肌腱、面神经隐窝、前庭导水管和锥隆起5个解剖结构，冠状面重组图像上选取盾板、横嵴、蜗窗、面神经的蛇眼征和锤骨外侧韧带5个解剖结构，双斜面重组图像上选取锤骨、砧骨、镫骨、上骨半规管和面神经管5个解剖结构，在双盲的情况下由放射学专家分别对各管电流和螺距下扫描的重组图像进行评分，随后进行统计学处理，从中筛选出满足诊断要求的最低管电流值和最大的螺距，分别采用患者25例(15耳)用该管电流值和螺距验证其可行性；然后利用模体分别测试各管电流和螺距下的图像的空间分辨率、噪声及其剂量长度积，并对测试所得参数数值进行比较和统计学处理。

Frontalis muscle suspension surgery with tensor fascia lata graft was performed secondarily.

我们利用大腿外侧筋膜作额肌悬吊以重建其上眼睑功能。

Results. Fundamental matrix and trifocal tensor indicates the internal relations of two and three images respectively.

本文利用基本矩阵和三视约束张量在平差前进行粗差观测值的剔除，尽可能减少整体平差时粗差观测值的数量，从而保证平差系统的稳定性。

Present dark material research may be deduced from the continuous medium, and it is very easy in the isotropic universe to obtain the tensor the fundamental mode.

摘要当代暗物质的研究从可压缩连续介质角度给出，在均匀各向同性的宇宙中很容易得到能动张量的基本形式。

They are both independent of scene structure and are determined by camera internal parameters and relative pose among images. The concepts and characteristics of fundamental matrix and trifocal tensor are described.

基本矩阵和三视张量分别表示两张和三张像片之间的内部投影几何关系，它与场景结构无关，由摄像机内方位元素和像片间摄像机的相对姿态唯一确定。

The calculation algorithms of fundamental matrix and trifocal tensor from camera projection matrices are deduced in detail. These matrices are successfully applied to outlier detection and elimination of point and line observations.

本文系统阐述了两者的概念及其性质，详细推导了利用已知的投影矩阵计算基本矩阵及三视张量的具体方法，并成功应用于粗差点、直线段观测值的剔除。

Different from existing techniques such as robust estimation which detect and eliminate outliers during the adjustment process, this thesis detects and eliminates outliers with fundamental matrix and trifocal tensor before point-line hybrid bundle adjustment to ensure the stability of adjustment

现有的大部分平差理论如抗差估计等都是在平差阶段进行粗差的剔除，如何有效地剔除粗差观测值并获得稳定可靠的平差结果一直是研究的重点和难点问题。

Main contents of the thesis include point and edge extraction based on least-squares template matching; space circle template matching and reconstruction; outlier detection and elimination with fundamental matrix and trifocal tensor; improvement of Homography-based calibration technique, 2D-DLT and bundle adjustment based non-metric camera calibration technique with planar-scenes, point-line hybrid photogrammetry and visual inspection.

本文的主要研究内容包括影像格网点与直线段的自动最小二乘模板匹配；基于物方直接解的空间圆匹配与重建；利用基本矩阵和三视张量进行观测值粗差的剔除；同形矩阵摄像机标定算法的改进；基于二维 DLT 和光束法平差的非量测数字摄像机标定；点、线混合摄影测量模型与视觉检测精度分析等。

Surfaces of Revolution in E_2~4 Space;2. The subdivision rules based on the geometric interpretation of the tensor product scheme, and it can reproduce the surfaces of revolution .

其细分规则基于张量积曲面细分模式的几何意义，不仅可以生成旋转曲面等特殊曲面，而且可以根据参数来控制细分曲面的形状。

Researches reveal that students who suffer from corporal punishment tend to resort to violence in their future life.

研究表明遭受过肉体惩罚的孩子倾向于在他们今后的人生中使用暴力。

Total sugar of sarcocarp and chlorophyll of pericarp increased firstly, and then decreased afterward along with altitude; Titratable acidity, ascorbicacid and anthocyanin of pericarp were increased along with altitude; The content of protein increased firstly and decreased afterward along with altitude; Carotenoid of pericarp were decreased along with altitude.

果肉总糖和果皮叶绿素含量随海拔高度升高先升高后降低；可滴定酸、维生素C和果皮花青苷含量均随海拔升高而升高；蛋白质在1720m处最大，1420m处最小；果皮类胡萝卜素随海拔升高而降低。