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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。
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The Kalahari Meerkat Project noted that the film was not completely accurate but praised it overall, though one reviewer found the "fictionalization" regrettable.
尽管有一位评论家认为影片令人遗憾的进行了虚构,但卡拉哈里猫鼬项目组对影片的评论是略有失真但面面俱全。
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Thus LES is proved to be suitable to simulate the flow and temperature fields of large scale vortices with complex geometric boundaries. LES cooperated with the second order full extension ETG finite element method is applied to simulate the forced convection heat transfer around two square cylinders arranged side by side. While the boundary conditions are symmetrical, the time history and power spectrums of drag coefficient, lift coefficient, averaged Nusselt number at the wall, and the streamwise velocity and temperature on the symmetrical points are calculated. The results show that the power spectrums are all almost symmetrical.
应用大涡模拟与二阶全展开ETG有限元离散格式相结合的方法对间距比为1.5的条件下横掠并列双方柱强制对流换热问题进行了数值模拟,通过边界条件对称时,对并列双方柱对称点上的速度和温度以及方柱的阻力系数、升力系数和壁面平均Nu数进行的时域分析和频域分析,得到了在对称边界条件下并列双方柱对称点上的速度和温度以及方柱的阻力系数、升力系数和壁面平均Nu数的功率谱均基本对称的结论。
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Second order incident boundary condition on fixed incident boundary is derived for numerical simulations, based on the cnoidal or sinusoidal motions of wave maker paddle, which shows that the prediction with second order incident boundary condition is more accurate than the prediction with first order incident boundary condition. 2 The analytical solution for higher-order Boussinesq equations is derived and its applicable range is discussed. 3 A 2-D fully non-linear numerical model using boundary element method is developed to obtain wave forces acting on rectangular obstacle. 4 The three-dimensional fully non-linear waves are studied in a numerical wave tank using finite element method.The studies on the coupled numerical model combined Boussinesq equations with Laplace equation are following.
非耦合非线性波浪计算模型:1 根据造波板做椭圆余弦运动或正弦运动速度,推导出数值模拟波浪水槽时固定入射边界上的二阶波浪入射边界条件,数值计算结果和实验结果的对比表明采用二阶入射边界条件对波面升高的预报比采用一阶入射边界条件对波面升高的预报更为精确;2 推导了波浪水槽造波板做正弦运动所产生波浪的高阶Boussinesq方程摄动展开解析解,讨论了该解析解的适用范围;3 对整个波浪水槽应用边界元方法数值模拟了波浪对物体的非线性作用;4 用有限元法求解三维Laplace方程模拟了三维完全非线性波浪水槽。
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In recent years, DO art is increasingly mature, the portion in showing to be with respect to its at the back of art of Jiao Zhi cleft palate caves to apply overview unbalancedly to be as follows. On operation of 1 cleft palate in the affects a tradition cleft palate taxis of share growth is with depart and shift oral cavity parenchyma comes mostly of repair cranny, put in two fundamental flaw: Mace of Huang Qiaoci Jiao receives health grave of Peng of creek of look of fish hawk of Tuo of Ken of put on the skin to cut pregnant Ru? 2 it is parenchyma depart and bone face are bare bring about scar organization to form, square afterwards delivers side of limitative palate ministry sexual development.
近年来,DO术日益成熟,现就其在矫治腭裂术后面中份凹陷畸形的应用综述如下。1腭裂手术对面中份发育的影响传统的腭裂整复术大多是以分离和移动口腔软组织来修复裂隙的,存在两个重要缺陷:一是未能达到硬腭非凡是其后部的骨性修复,二是软组织分离和骨面裸露导致瘢痕组织形成,限制腭部侧方的继发性发育。
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Rolling'.'' pin at the man or flagellate himself.
擀'。''面''。'杖'。''朝那人劈面摔去呢,还是该把自己痛打一顿。
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The building of flamelet database is very important a step in improving flamelet model.
火焰面数据库的建立是改进火焰面模型的重要一环,具体来说包括提高火焰燃烧状态数据的精确性和完备性,以及熄火极限的准确把握。
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Next, we developed direct calculation solvers and flamelet solvers based on OpenFOAM and used them to study and analyzed exactness and limitations of flamelet model in multi-dimensional CFD.
此后,基于OpenFOAM程序开发出多维流场中燃烧问题的直接求解器和火焰面模型求解器,分析了火焰面模型在多维燃烧CFD中的准确性和局限性。
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Electrostatic forces are employed to manipulate the shape of liquid polymer lens. Surface profile distortions of the liquid lens result in its focus variability. UV light is employed to cure the liquid lens when its surface profile and focal spot are appropriate. Therefore, aspherical micro-lens with nice optical imaging and focusing abilities can be fabricated.
在实时进行光学检测的条件下,选择光固化材料,利用电场作用操控液滴透镜的面形实现变焦,在检测到较好的透镜面形和聚焦状态时,采用紫外光固化技术使液滴透镜固化,可制作具有良好光学成像和聚焦性能的非球面微透镜。
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The fault-plan solutions for the two events of the injection-induced microearthquakes were determined by using the first-motion′s direction of P waves from records of the KTB surface stations the focal mechanism at 5.1 km: the nodal planes Ⅰ, strike 30°, dip 46°, slip 10°; the nodal planes Ⅱ: strike 293°, dip 83°, slip 136°; T-axis: azimuth 241°, plunge 35°; P-axis: azimuth 349°,plunge 24°.
用KTB地面台网记录的资料和P波初动方向得到了这次注水诱发地震中两个大地震的震源机制解。其中震源深度为5.1km的地震,其节面Ⅰ参数为:走向30°,倾角46°,滑动角10°;其节面Ⅱ参数为:走向293°,倾角83°,滑动角136°;T轴方位角:241°,倾角:35°;P轴方位角:349°,倾角:24°。
- 推荐网络例句
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For a big chunk of credit-card losses; the number of filings (and thus charge-off rates) would be rising again, whether
年美国个人破产法的一个改动使得破产登记急速下降,而后引起了信用卡大规模的亏损。
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Eph. 4:23 And that you be renewed in the spirit of your mind
弗四23 而在你们心思的灵里得以更新
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Lao Qiu is the Chairman of China Qiuyang Translation Group and the head master of the Confucius School. He has committed himself to the research and promotion of the classics of China.
老秋先生为中国秋阳翻译集团的董事长和孔子商学院的院长,致力于国学的研究和推广。