弓形

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。

Patterns in Nature: Rainbows A fisheye lens captures arcs of light crowning the Canadian wilderness.

意译：彩虹在自然界的模式。使用鱼眼镜头能捕捉弓形光线在加拿大的荒野外高空。

The flaxen brow arched again, You think so.

" / 再一次弓形的亚麻眉毛，"你这麼认为。

Forefeet : Broad,with strong, tight, well arched toes.

前腿：宽阔，强健，紧密，脚趾成弓形。

In this paper, we show a formula for the arciform area enclosed with a parabola and a straight line by means of two kinds of clever separation and the knowledges of elements mathematics such as the sum formula of infinite decreasing geometric sequence .

文章运用两种巧妙的分割和利用无穷递缩等比数列求和公式等初等数学知识，求出了抛物线与相交直线围成的弓形面积计算公式。

Infections such as toxoplasmosis, Group B Streptococcus, listeriosis or German measles.

感染，如弓形虫病， B群链球菌，忒或德国麻疹。

They are slamming into neighboring gas to create a pair of bow shocks on either side of the globule.

它们撞进周围的气体在球状体两边制造了一对弓形击波。

They are slamming into neighboring gas to createa pair of bow shocks on either side of the globule.

它们撞进周围的气体在球状体两边制造了一对弓形击波。

Methods Supernatant (1.5 ml) of different doses of the traditional Chinese medicine was collected by normal saline immersion and 2.5×104 Toxoplasma gondi i tachyzoites were added in each paste well for 8 hours.

用生理盐水浸泡不同剂量的常青胶囊，各取上清液1.5 ml，加入2.5×104弓形虫速殖子，作用8h后，将速殖子腹腔接种及灌胃接种正常小鼠，观察发病情况。

Base on the summarization of the 50 years safety and high efficient coal mining achievements with hydraulic powered shield supports in Huainan coal mines the paper analyzed the rational layout of the gateway,optimized geometric parameters of thecoal mining face,improvement in potential,reform and invonvation,production process control,mien water and mine fire prevention and control,the siutbal conditions for the pseudo inclined coal mining with flexible shild support and other key technologies.

1概况1956年淮南煤矿先后试验了木结构的平板型、撬板形、"く"形、"人"形，钢结构的弧形、弓形、"く"形、"八"形等掩护支架，通过多次工业性试验并对所试验的掩护支架结构进行了一系列改革和完善，终于形成了目前所用的钢结构八字形掩护支架。以单腿支撑式掩护支架为例，八字形掩护支架是由钢梁、钢丝绳、垫板和绳卡、U形螺栓、扁铁、柱托、滑托板等组成。

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。