半球结构

with the development of satellite navigation communication,antenna is a very important unit,performance of the satellite navigation communication system is affected by it partly.a new type of bifilar helix for satellite navigation communication system is introduced,and the traving-wave bifilar helix is analyzed briefly.meanwhile,the design and the test results are given.the results show that the antenna possesses excellent circular hemispherical beam with wide angle circular polarization and better impedance match,and has a compact structure and high integration.it can be applied in caps systems successful.

小 摘要：随着卫星导航通信技术的迅速发展，天线作为卫星导航通信系统中的重要部分，在一定程度上决定着卫星导航通信系统的性能。介绍一种用于卫星导航通信系统的双臂螺旋天线，讲述爬行波式螺旋天线的设计过程，并给出最终测试结果。结果表明，该天线具有优良的圆对称半球波束，良好的广角圆极化特性和优良的阻抗匹配特性，其结构简单、紧凑，为通信入站回传提供了一种优良的选择。

1、Neural network correlated with LIFG and RIFG exists in normal subjects in resting-state,which might be the neural foundation in retaining the normal language function;2、The left fusiform gyrus,bilateral medial frontal gyrus and right anterior cingulum in aphasia patients after stroke showed low degree correlation,that might be one of the mechanisms of aphasia;3、The brain regions showed positive correlation with RIFG in aphasia patients only exist in right hemisphere in resting-state as well as which exist in bilateral hemisphere in normal subjects,suggested that RIFG is out of correlation with the left hemisphere in aphasia patients;4、The left thalamus showed positive correlation with RIFG only in normal subjects, inferred that the left thalamus might be an important mesomerism structure in the correlation of bilateral hemisphere;5、Left insula showed stronger positive correlation with RIFG in normal subjects than that in aphasia patients,suggested that dominant hemisphere insula is important in retaining in normal language function.

1、正常人在静息状态下即存在与LIFG和RIFG具有相关性的神经网络，该网络可能是维持正常语言功能的神经基础；2、脑梗死后运动性失语患者左侧梭状回、双侧额叶内侧回、右侧前扣带与LIFG的连接程度的减低可能是运动性失语的发生机制之一；3、与RIFG正相关的脑区在对照组为双侧半球分布，而在患者组仅出现在右侧半球，说明患者组RIFG与左侧半球的连接中断；4、RIFG与左侧丘脑的正相关性仅出现在正常对照组中，推测左侧丘脑可能是联系两侧半球功能区的重要中介结构；5、对照组与RIFG正相关性明显高于患者组的脑区位于左侧岛叶，说明优势半球岛叶对维持正常语言功能具有重要作用；第二部分脑梗死运动性失语患者语言恢复机制的静息态fMRI初步探讨目的：运用fMRI技术，采用种子点方法在静息状态下分析脑梗死运动性失语患者不同的恢复阶段语言功能连接方式。

Age, gender, and hemispheric location may be the main source of differences in iron concentration in the human brain.

通过对以往文献的回顾和分析，我们认为年龄、性别和大脑左右半球位置是影响各脑区结构铁含量的主要因素。

Large limbic structures of the medial temporal lobes, one in each hemisphere; the hippocampi are involved in certain kinds of memory.

中间颞叶的广大边缘结构，在各个半球；此结构被介入在某些记忆类型。

"The dissociation between writing (a more common trigger for reflex epilepsy) and drawing emphasizes the presence of anatomically distinctive cognitive modules in the dominant and nondominant hemispheres."

通常能触发癫痫的书写活动和绘画引发的癫痫之间的无关联性揭示了：在占优势和非占优势的两个脑半球中，解剖结构上的思维模式明显不同。

Cranial MRI showed round foci of signal change of different sizes in the subcortical white matter of the cerebral hemisphere, in the left paramedian portion of the pons and near the fourth ventricle.

脑部MRI见大脑半球皮质下白质的不同部位、左侧脑桥旁正中结构靠近第四脑室处散在许多圆形异常信号病灶。

Intriguingly, they found that in the musicians' planum temporale - a brain structure associated with auditory processing - was bigger in the left hemisphere and smaller in the right than in the non-musicians.

耐人寻味的是，他们发现，在音乐家平面副词-脑部结构与听觉加工、亚细亚在较小的左右半球比非音乐家。

2The VEPs amplitudes in right-handed subjects with right half - field stimulation were higher than left one. The neu-roanatomic asymmetry of occipital lobes bilaterally provided some basis for this electrophysi-ological results.

②右利手者右半视野刺激的 VEPs 振幅大于左半视野刺激的 VEPs 振幅，两半球枕叶皮层神经解剖学上的非对称性为我们的电生理结果提供了一定的形态结构基础。

In a few washrooms will show that water whirlpools both ways depending on the sink's structure, not the hemisphere.

你可以在一些盥洗室中轻易地验证这一点，无论是逆时针还是顺时针，水流旋涡的方向取决于水槽的结构，而非南北半球。

Not only is the Earth's rotation too weak to affect the direction of water flowing in a drain, tests you can easily perform in a few washrooms will show that water whirlpools both ways depending on the sink's structure, not the hemisphere.

其实，地球自转的作用很微弱，因此难以影响水流动的方向。你可以在一些盥洗室中轻易地验证这一点，无论是逆时针还是顺时针，水流旋涡的方向取决于水槽的结构，而非南北半球。

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了