纤维束

We observed highly significant changes of fiber orientations at regions that correspond to the superior longitudinal fasciculus during the first 5 years.

我们发现在出生后的开始5年，上纵束相关纤维束的区域定向发生明显改变。这个结果说明上纵束的轴突和髓鞘发育很慢，而这个区域被认为和语言功能相关。

The results of functional magnetic resonance: N-acetyl-aspartic acid, choline and creatine in left temporal lobe and anterior part of frontal lobe decreased more obviously and regional cerebral blood volume and regional cerebral blood flow in these areas decreased,while average pass time and peak time of the contrast medium in these areas slightly increased as compared with those in the conitralateral areas; fraction of anisotropy values and the tracked fasciculus in left corticospinal tract decreased, and the connecting fibers between Broca and Wernicke areas also decreased as compared with those in the contralateral area.

功能磁共振检查结果：左侧颞叶和额叶前部的N-乙酰天门冬氨酸、胆碱、肌酸均较对侧明显降低，左侧颞极及额前部的局部脑血容量、局部脑血流量较对侧降低，对比剂平均通过时间、达峰时间较对侧轻度延长；左侧皮质脊髓束部分各向异性值及追踪到的纤维束较对侧减少，Broca区与Wernicke区之间的联系纤维与对侧相比减少。

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 patient showed atrophy in frontal and temporal lobe on regular MRI, significantly reduced amount of Nacetyl aspartic acid、cholineand creatinecompared with contralateral on MRS , remarkably decreased blood flow in the left temporal polar and front part of fontal lobe compared with contralateral on PWI. There were decreased association fibers between Broca and other regions meanwhile no association fibers were found between triangular area and wernicke region on DTI. The fibers projecting to opercular part of frontal lobe via archiform fibers were lessened. The mean FA and fibers of Broca and Wernick regions were less than that of the healthy subjects.

常规MRI显示左侧额叶及颞叶萎缩；磁共振波谱分析显示左侧颞叶和额叶N乙酰天门冬氨酸、胆碱、肌酸含量较对侧明显减低；磁共振灌注成像显示左侧颞极及额前部的血流量较对侧减低；弥散张量成像显示左Broca区与其他脑区间纤维联系减少，三角区与Wernicke区无纤维联络，左侧Wernicke区通过弓状纤维到达额叶岛盖部的纤维减少，Broca及Wernicke区平均FA及纤维束较正常人减少。

A 3-D solid unit cell geometry model is developed, the characteristics of geometry are studied and yarn-jamming condition is discussed.

该几何模型考虑了纤维束在内部、边界及边角的不同交织方式，纤维束在整个编织过程中的连续性，保证了三维编织复合材料的结构完整性。

A unit material cell including 19 fiber and matrix, the location and orientation of the fiber are given.

材料单胞含19根纤维束及基体，给出了纤维束的方向及位置。

RESULTS In normal volunteers group, anisotropy measurements in white matter regions were significantly larger than that of gray matter regions, different white matter structures show different anisotropy degree, with the commissural neurofibers of white matter having the highest value, followed by projection fibers and association fibers.

结果 在正常组DTI显示灰质与白质区各向异性存在显著差异，不同部位的白质纤维束各向异性程度亦不相同，脑白质连合纤维各向异性程度最高，其次为脑白质的投射纤维，再次为联络纤维、丘脑、基底节区灰质核团等。

The radioscapholunate ligament was mainly composed of loose connective tissue with no bulky tendinous collagen fiber fascicles, few fiber fascicles but rich vessel bundles.

桡舟月韧带主要由疏松结缔组织组成，没有粗大的肌腱样胶原纤维束，胶原纤维束很少，而血管束丰富。

In pulping and papermaking process, the existence of shives leads to many problems, such as affecting the performance of a paper machine negatively, decreasing the strength properties and printability of the paper, and so on.

摘 要：介绍了高得率制浆工艺对消除浆中纤维束的影响，论述了降低纤维束含量从而提高纸浆质量及成纸印刷适性的措施。

Results showed that, the specific refining energy consumption is decreased with increment of rotation speed of the primary refiner. At freeness level of about 670 mL CSF, for example, the specific refining energy consumptions is 363 kWh/t o.d. at 3000 r/min, and 305 kWh/t o.d. at 3500 r/min, which is equivalent to 16% energy saving, furthermore the specific energy consumption is only 265 kWh/t o.d. at 4000 r/min, which means 27% less refining energy required. At the same time, pulps produced at higher refiner speed have higher strength properties and lower shives contents. There is little change of optical properties of the pulps.

结果表明：小叶桉物料在相同条件下进行汽蒸、挤压和化学预浸渍后，分别采用3500 r/min和4000 r/min的盘磨转速进行第一段磨浆，浆料磨至游离度670 mL时所需磨浆电耗与3000 r/min时的相比，分别下降16%和27%；浆料中纤维束含量分别降低20%和35%；第一段磨后浆料再分别经相同盘磨转速（3000 r/min）的后续磨浆后，与相近游离度的浆料性能比较可知，随第一段磨浆盘磨转速的提高，浆料的细小组分含量略有增加，纤维束含量显著降低，强度性能有不同程度的改善，但光学性能变化不显著。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。